// SPDX-License-Identifier: GPL-2.0-or-later
|
/**************************************************************************/
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/* */
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/* IBM System i and System p Virtual NIC Device Driver */
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/* Copyright (C) 2014 IBM Corp. */
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/* Santiago Leon (santi_leon@yahoo.com) */
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/* Thomas Falcon (tlfalcon@linux.vnet.ibm.com) */
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/* John Allen (jallen@linux.vnet.ibm.com) */
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/* */
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/* */
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/* This module contains the implementation of a virtual ethernet device */
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/* for use with IBM i/p Series LPAR Linux. It utilizes the logical LAN */
|
/* option of the RS/6000 Platform Architecture to interface with virtual */
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/* ethernet NICs that are presented to the partition by the hypervisor. */
|
/* */
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/* Messages are passed between the VNIC driver and the VNIC server using */
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/* Command/Response Queues (CRQs) and sub CRQs (sCRQs). CRQs are used to */
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/* issue and receive commands that initiate communication with the server */
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/* on driver initialization. Sub CRQs (sCRQs) are similar to CRQs, but */
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/* are used by the driver to notify the server that a packet is */
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/* ready for transmission or that a buffer has been added to receive a */
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/* packet. Subsequently, sCRQs are used by the server to notify the */
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/* driver that a packet transmission has been completed or that a packet */
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/* has been received and placed in a waiting buffer. */
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/* */
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/* In lieu of a more conventional "on-the-fly" DMA mapping strategy in */
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/* which skbs are DMA mapped and immediately unmapped when the transmit */
|
/* or receive has been completed, the VNIC driver is required to use */
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/* "long term mapping". This entails that large, continuous DMA mapped */
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/* buffers are allocated on driver initialization and these buffers are */
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/* then continuously reused to pass skbs to and from the VNIC server. */
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/* */
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/**************************************************************************/
|
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/completion.h>
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#include <linux/ioport.h>
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#include <linux/dma-mapping.h>
|
#include <linux/kernel.h>
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#include <linux/netdevice.h>
|
#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
|
#include <linux/init.h>
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#include <linux/delay.h>
|
#include <linux/mm.h>
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#include <linux/ethtool.h>
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#include <linux/proc_fs.h>
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#include <linux/if_arp.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/irq.h>
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#include <linux/kthread.h>
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#include <linux/seq_file.h>
|
#include <linux/interrupt.h>
|
#include <net/net_namespace.h>
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#include <asm/hvcall.h>
|
#include <linux/atomic.h>
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#include <asm/vio.h>
|
#include <asm/iommu.h>
|
#include <linux/uaccess.h>
|
#include <asm/firmware.h>
|
#include <linux/workqueue.h>
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#include <linux/if_vlan.h>
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#include <linux/utsname.h>
|
|
#include "ibmvnic.h"
|
|
static const char ibmvnic_driver_name[] = "ibmvnic";
|
static const char ibmvnic_driver_string[] = "IBM System i/p Virtual NIC Driver";
|
|
MODULE_AUTHOR("Santiago Leon");
|
MODULE_DESCRIPTION("IBM System i/p Virtual NIC Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(IBMVNIC_DRIVER_VERSION);
|
|
static int ibmvnic_version = IBMVNIC_INITIAL_VERSION;
|
static int ibmvnic_remove(struct vio_dev *);
|
static void release_sub_crqs(struct ibmvnic_adapter *, bool);
|
static int ibmvnic_reset_crq(struct ibmvnic_adapter *);
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static int ibmvnic_send_crq_init(struct ibmvnic_adapter *);
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static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *);
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static int ibmvnic_send_crq(struct ibmvnic_adapter *, union ibmvnic_crq *);
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static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
|
union sub_crq *sub_crq);
|
static int send_subcrq_indirect(struct ibmvnic_adapter *, u64, u64, u64);
|
static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance);
|
static int enable_scrq_irq(struct ibmvnic_adapter *,
|
struct ibmvnic_sub_crq_queue *);
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static int disable_scrq_irq(struct ibmvnic_adapter *,
|
struct ibmvnic_sub_crq_queue *);
|
static int pending_scrq(struct ibmvnic_adapter *,
|
struct ibmvnic_sub_crq_queue *);
|
static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *,
|
struct ibmvnic_sub_crq_queue *);
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static int ibmvnic_poll(struct napi_struct *napi, int data);
|
static void send_query_map(struct ibmvnic_adapter *adapter);
|
static int send_request_map(struct ibmvnic_adapter *, dma_addr_t, __be32, u8);
|
static int send_request_unmap(struct ibmvnic_adapter *, u8);
|
static int send_login(struct ibmvnic_adapter *adapter);
|
static void send_query_cap(struct ibmvnic_adapter *adapter);
|
static int init_sub_crqs(struct ibmvnic_adapter *);
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static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter);
|
static int ibmvnic_reset_init(struct ibmvnic_adapter *, bool reset);
|
static void release_crq_queue(struct ibmvnic_adapter *);
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static int __ibmvnic_set_mac(struct net_device *, u8 *);
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static int init_crq_queue(struct ibmvnic_adapter *adapter);
|
static int send_query_phys_parms(struct ibmvnic_adapter *adapter);
|
|
struct ibmvnic_stat {
|
char name[ETH_GSTRING_LEN];
|
int offset;
|
};
|
|
#define IBMVNIC_STAT_OFF(stat) (offsetof(struct ibmvnic_adapter, stats) + \
|
offsetof(struct ibmvnic_statistics, stat))
|
#define IBMVNIC_GET_STAT(a, off) (*((u64 *)(((unsigned long)(a)) + (off))))
|
|
static const struct ibmvnic_stat ibmvnic_stats[] = {
|
{"rx_packets", IBMVNIC_STAT_OFF(rx_packets)},
|
{"rx_bytes", IBMVNIC_STAT_OFF(rx_bytes)},
|
{"tx_packets", IBMVNIC_STAT_OFF(tx_packets)},
|
{"tx_bytes", IBMVNIC_STAT_OFF(tx_bytes)},
|
{"ucast_tx_packets", IBMVNIC_STAT_OFF(ucast_tx_packets)},
|
{"ucast_rx_packets", IBMVNIC_STAT_OFF(ucast_rx_packets)},
|
{"mcast_tx_packets", IBMVNIC_STAT_OFF(mcast_tx_packets)},
|
{"mcast_rx_packets", IBMVNIC_STAT_OFF(mcast_rx_packets)},
|
{"bcast_tx_packets", IBMVNIC_STAT_OFF(bcast_tx_packets)},
|
{"bcast_rx_packets", IBMVNIC_STAT_OFF(bcast_rx_packets)},
|
{"align_errors", IBMVNIC_STAT_OFF(align_errors)},
|
{"fcs_errors", IBMVNIC_STAT_OFF(fcs_errors)},
|
{"single_collision_frames", IBMVNIC_STAT_OFF(single_collision_frames)},
|
{"multi_collision_frames", IBMVNIC_STAT_OFF(multi_collision_frames)},
|
{"sqe_test_errors", IBMVNIC_STAT_OFF(sqe_test_errors)},
|
{"deferred_tx", IBMVNIC_STAT_OFF(deferred_tx)},
|
{"late_collisions", IBMVNIC_STAT_OFF(late_collisions)},
|
{"excess_collisions", IBMVNIC_STAT_OFF(excess_collisions)},
|
{"internal_mac_tx_errors", IBMVNIC_STAT_OFF(internal_mac_tx_errors)},
|
{"carrier_sense", IBMVNIC_STAT_OFF(carrier_sense)},
|
{"too_long_frames", IBMVNIC_STAT_OFF(too_long_frames)},
|
{"internal_mac_rx_errors", IBMVNIC_STAT_OFF(internal_mac_rx_errors)},
|
};
|
|
static long h_reg_sub_crq(unsigned long unit_address, unsigned long token,
|
unsigned long length, unsigned long *number,
|
unsigned long *irq)
|
{
|
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
|
long rc;
|
|
rc = plpar_hcall(H_REG_SUB_CRQ, retbuf, unit_address, token, length);
|
*number = retbuf[0];
|
*irq = retbuf[1];
|
|
return rc;
|
}
|
|
/**
|
* ibmvnic_wait_for_completion - Check device state and wait for completion
|
* @adapter: private device data
|
* @comp_done: completion structure to wait for
|
* @timeout: time to wait in milliseconds
|
*
|
* Wait for a completion signal or until the timeout limit is reached
|
* while checking that the device is still active.
|
*/
|
static int ibmvnic_wait_for_completion(struct ibmvnic_adapter *adapter,
|
struct completion *comp_done,
|
unsigned long timeout)
|
{
|
struct net_device *netdev;
|
unsigned long div_timeout;
|
u8 retry;
|
|
netdev = adapter->netdev;
|
retry = 5;
|
div_timeout = msecs_to_jiffies(timeout / retry);
|
while (true) {
|
if (!adapter->crq.active) {
|
netdev_err(netdev, "Device down!\n");
|
return -ENODEV;
|
}
|
if (!retry--)
|
break;
|
if (wait_for_completion_timeout(comp_done, div_timeout))
|
return 0;
|
}
|
netdev_err(netdev, "Operation timed out.\n");
|
return -ETIMEDOUT;
|
}
|
|
static int alloc_long_term_buff(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_long_term_buff *ltb, int size)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
int rc;
|
|
ltb->size = size;
|
ltb->buff = dma_alloc_coherent(dev, ltb->size, <b->addr,
|
GFP_KERNEL);
|
|
if (!ltb->buff) {
|
dev_err(dev, "Couldn't alloc long term buffer\n");
|
return -ENOMEM;
|
}
|
ltb->map_id = adapter->map_id;
|
adapter->map_id++;
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|
mutex_lock(&adapter->fw_lock);
|
adapter->fw_done_rc = 0;
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reinit_completion(&adapter->fw_done);
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|
rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
|
if (rc) {
|
dev_err(dev, "send_request_map failed, rc = %d\n", rc);
|
goto out;
|
}
|
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
|
if (rc) {
|
dev_err(dev,
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"Long term map request aborted or timed out,rc = %d\n",
|
rc);
|
goto out;
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}
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|
if (adapter->fw_done_rc) {
|
dev_err(dev, "Couldn't map long term buffer,rc = %d\n",
|
adapter->fw_done_rc);
|
rc = -1;
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goto out;
|
}
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rc = 0;
|
out:
|
if (rc) {
|
dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
|
ltb->buff = NULL;
|
}
|
mutex_unlock(&adapter->fw_lock);
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return rc;
|
}
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|
static void free_long_term_buff(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_long_term_buff *ltb)
|
{
|
struct device *dev = &adapter->vdev->dev;
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|
if (!ltb->buff)
|
return;
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|
/* VIOS automatically unmaps the long term buffer at remote
|
* end for the following resets:
|
* FAILOVER, MOBILITY, TIMEOUT.
|
*/
|
if (adapter->reset_reason != VNIC_RESET_FAILOVER &&
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adapter->reset_reason != VNIC_RESET_MOBILITY &&
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adapter->reset_reason != VNIC_RESET_TIMEOUT)
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send_request_unmap(adapter, ltb->map_id);
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dma_free_coherent(dev, ltb->size, ltb->buff, ltb->addr);
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ltb->buff = NULL;
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ltb->map_id = 0;
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}
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static int reset_long_term_buff(struct ibmvnic_adapter *adapter,
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struct ibmvnic_long_term_buff *ltb)
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{
|
struct device *dev = &adapter->vdev->dev;
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int rc;
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memset(ltb->buff, 0, ltb->size);
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|
mutex_lock(&adapter->fw_lock);
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adapter->fw_done_rc = 0;
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|
reinit_completion(&adapter->fw_done);
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rc = send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id);
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if (rc) {
|
mutex_unlock(&adapter->fw_lock);
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return rc;
|
}
|
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rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
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if (rc) {
|
dev_info(dev,
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"Reset failed, long term map request timed out or aborted\n");
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mutex_unlock(&adapter->fw_lock);
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return rc;
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}
|
|
if (adapter->fw_done_rc) {
|
dev_info(dev,
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"Reset failed, attempting to free and reallocate buffer\n");
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free_long_term_buff(adapter, ltb);
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mutex_unlock(&adapter->fw_lock);
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return alloc_long_term_buff(adapter, ltb, ltb->size);
|
}
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mutex_unlock(&adapter->fw_lock);
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return 0;
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}
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static void deactivate_rx_pools(struct ibmvnic_adapter *adapter)
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{
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int i;
|
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for (i = 0; i < adapter->num_active_rx_pools; i++)
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adapter->rx_pool[i].active = 0;
|
}
|
|
static void replenish_rx_pool(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_rx_pool *pool)
|
{
|
int count = pool->size - atomic_read(&pool->available);
|
u64 handle = adapter->rx_scrq[pool->index]->handle;
|
struct device *dev = &adapter->vdev->dev;
|
int buffers_added = 0;
|
unsigned long lpar_rc;
|
union sub_crq sub_crq;
|
struct sk_buff *skb;
|
unsigned int offset;
|
dma_addr_t dma_addr;
|
unsigned char *dst;
|
int shift = 0;
|
int index;
|
int i;
|
|
if (!pool->active)
|
return;
|
|
for (i = 0; i < count; ++i) {
|
skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
|
if (!skb) {
|
dev_err(dev, "Couldn't replenish rx buff\n");
|
adapter->replenish_no_mem++;
|
break;
|
}
|
|
index = pool->free_map[pool->next_free];
|
|
if (pool->rx_buff[index].skb)
|
dev_err(dev, "Inconsistent free_map!\n");
|
|
/* Copy the skb to the long term mapped DMA buffer */
|
offset = index * pool->buff_size;
|
dst = pool->long_term_buff.buff + offset;
|
memset(dst, 0, pool->buff_size);
|
dma_addr = pool->long_term_buff.addr + offset;
|
pool->rx_buff[index].data = dst;
|
|
pool->free_map[pool->next_free] = IBMVNIC_INVALID_MAP;
|
pool->rx_buff[index].dma = dma_addr;
|
pool->rx_buff[index].skb = skb;
|
pool->rx_buff[index].pool_index = pool->index;
|
pool->rx_buff[index].size = pool->buff_size;
|
|
memset(&sub_crq, 0, sizeof(sub_crq));
|
sub_crq.rx_add.first = IBMVNIC_CRQ_CMD;
|
sub_crq.rx_add.correlator =
|
cpu_to_be64((u64)&pool->rx_buff[index]);
|
sub_crq.rx_add.ioba = cpu_to_be32(dma_addr);
|
sub_crq.rx_add.map_id = pool->long_term_buff.map_id;
|
|
/* The length field of the sCRQ is defined to be 24 bits so the
|
* buffer size needs to be left shifted by a byte before it is
|
* converted to big endian to prevent the last byte from being
|
* truncated.
|
*/
|
#ifdef __LITTLE_ENDIAN__
|
shift = 8;
|
#endif
|
sub_crq.rx_add.len = cpu_to_be32(pool->buff_size << shift);
|
|
lpar_rc = send_subcrq(adapter, handle, &sub_crq);
|
if (lpar_rc != H_SUCCESS)
|
goto failure;
|
|
buffers_added++;
|
adapter->replenish_add_buff_success++;
|
pool->next_free = (pool->next_free + 1) % pool->size;
|
}
|
atomic_add(buffers_added, &pool->available);
|
return;
|
|
failure:
|
if (lpar_rc != H_PARAMETER && lpar_rc != H_CLOSED)
|
dev_err_ratelimited(dev, "rx: replenish packet buffer failed\n");
|
pool->free_map[pool->next_free] = index;
|
pool->rx_buff[index].skb = NULL;
|
|
dev_kfree_skb_any(skb);
|
adapter->replenish_add_buff_failure++;
|
atomic_add(buffers_added, &pool->available);
|
|
if (lpar_rc == H_CLOSED || adapter->failover_pending) {
|
/* Disable buffer pool replenishment and report carrier off if
|
* queue is closed or pending failover.
|
* Firmware guarantees that a signal will be sent to the
|
* driver, triggering a reset.
|
*/
|
deactivate_rx_pools(adapter);
|
netif_carrier_off(adapter->netdev);
|
}
|
}
|
|
static void replenish_pools(struct ibmvnic_adapter *adapter)
|
{
|
int i;
|
|
adapter->replenish_task_cycles++;
|
for (i = 0; i < adapter->num_active_rx_pools; i++) {
|
if (adapter->rx_pool[i].active)
|
replenish_rx_pool(adapter, &adapter->rx_pool[i]);
|
}
|
|
netdev_dbg(adapter->netdev, "Replenished %d pools\n", i);
|
}
|
|
static void release_stats_buffers(struct ibmvnic_adapter *adapter)
|
{
|
kfree(adapter->tx_stats_buffers);
|
kfree(adapter->rx_stats_buffers);
|
adapter->tx_stats_buffers = NULL;
|
adapter->rx_stats_buffers = NULL;
|
}
|
|
static int init_stats_buffers(struct ibmvnic_adapter *adapter)
|
{
|
adapter->tx_stats_buffers =
|
kcalloc(IBMVNIC_MAX_QUEUES,
|
sizeof(struct ibmvnic_tx_queue_stats),
|
GFP_KERNEL);
|
if (!adapter->tx_stats_buffers)
|
return -ENOMEM;
|
|
adapter->rx_stats_buffers =
|
kcalloc(IBMVNIC_MAX_QUEUES,
|
sizeof(struct ibmvnic_rx_queue_stats),
|
GFP_KERNEL);
|
if (!adapter->rx_stats_buffers)
|
return -ENOMEM;
|
|
return 0;
|
}
|
|
static void release_stats_token(struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
|
if (!adapter->stats_token)
|
return;
|
|
dma_unmap_single(dev, adapter->stats_token,
|
sizeof(struct ibmvnic_statistics),
|
DMA_FROM_DEVICE);
|
adapter->stats_token = 0;
|
}
|
|
static int init_stats_token(struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
dma_addr_t stok;
|
|
stok = dma_map_single(dev, &adapter->stats,
|
sizeof(struct ibmvnic_statistics),
|
DMA_FROM_DEVICE);
|
if (dma_mapping_error(dev, stok)) {
|
dev_err(dev, "Couldn't map stats buffer\n");
|
return -1;
|
}
|
|
adapter->stats_token = stok;
|
netdev_dbg(adapter->netdev, "Stats token initialized (%llx)\n", stok);
|
return 0;
|
}
|
|
static int reset_rx_pools(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_rx_pool *rx_pool;
|
u64 buff_size;
|
int rx_scrqs;
|
int i, j, rc;
|
|
if (!adapter->rx_pool)
|
return -1;
|
|
buff_size = adapter->cur_rx_buf_sz;
|
rx_scrqs = adapter->num_active_rx_pools;
|
for (i = 0; i < rx_scrqs; i++) {
|
rx_pool = &adapter->rx_pool[i];
|
|
netdev_dbg(adapter->netdev, "Re-setting rx_pool[%d]\n", i);
|
|
if (rx_pool->buff_size != buff_size) {
|
free_long_term_buff(adapter, &rx_pool->long_term_buff);
|
rx_pool->buff_size = buff_size;
|
rc = alloc_long_term_buff(adapter,
|
&rx_pool->long_term_buff,
|
rx_pool->size *
|
rx_pool->buff_size);
|
} else {
|
rc = reset_long_term_buff(adapter,
|
&rx_pool->long_term_buff);
|
}
|
|
if (rc)
|
return rc;
|
|
for (j = 0; j < rx_pool->size; j++)
|
rx_pool->free_map[j] = j;
|
|
memset(rx_pool->rx_buff, 0,
|
rx_pool->size * sizeof(struct ibmvnic_rx_buff));
|
|
atomic_set(&rx_pool->available, 0);
|
rx_pool->next_alloc = 0;
|
rx_pool->next_free = 0;
|
rx_pool->active = 1;
|
}
|
|
return 0;
|
}
|
|
static void release_rx_pools(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_rx_pool *rx_pool;
|
int i, j;
|
|
if (!adapter->rx_pool)
|
return;
|
|
for (i = 0; i < adapter->num_active_rx_pools; i++) {
|
rx_pool = &adapter->rx_pool[i];
|
|
netdev_dbg(adapter->netdev, "Releasing rx_pool[%d]\n", i);
|
|
kfree(rx_pool->free_map);
|
free_long_term_buff(adapter, &rx_pool->long_term_buff);
|
|
if (!rx_pool->rx_buff)
|
continue;
|
|
for (j = 0; j < rx_pool->size; j++) {
|
if (rx_pool->rx_buff[j].skb) {
|
dev_kfree_skb_any(rx_pool->rx_buff[j].skb);
|
rx_pool->rx_buff[j].skb = NULL;
|
}
|
}
|
|
kfree(rx_pool->rx_buff);
|
}
|
|
kfree(adapter->rx_pool);
|
adapter->rx_pool = NULL;
|
adapter->num_active_rx_pools = 0;
|
}
|
|
static int init_rx_pools(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
struct device *dev = &adapter->vdev->dev;
|
struct ibmvnic_rx_pool *rx_pool;
|
int rxadd_subcrqs;
|
u64 buff_size;
|
int i, j;
|
|
rxadd_subcrqs = adapter->num_active_rx_scrqs;
|
buff_size = adapter->cur_rx_buf_sz;
|
|
adapter->rx_pool = kcalloc(rxadd_subcrqs,
|
sizeof(struct ibmvnic_rx_pool),
|
GFP_KERNEL);
|
if (!adapter->rx_pool) {
|
dev_err(dev, "Failed to allocate rx pools\n");
|
return -1;
|
}
|
|
adapter->num_active_rx_pools = rxadd_subcrqs;
|
|
for (i = 0; i < rxadd_subcrqs; i++) {
|
rx_pool = &adapter->rx_pool[i];
|
|
netdev_dbg(adapter->netdev,
|
"Initializing rx_pool[%d], %lld buffs, %lld bytes each\n",
|
i, adapter->req_rx_add_entries_per_subcrq,
|
buff_size);
|
|
rx_pool->size = adapter->req_rx_add_entries_per_subcrq;
|
rx_pool->index = i;
|
rx_pool->buff_size = buff_size;
|
rx_pool->active = 1;
|
|
rx_pool->free_map = kcalloc(rx_pool->size, sizeof(int),
|
GFP_KERNEL);
|
if (!rx_pool->free_map) {
|
release_rx_pools(adapter);
|
return -1;
|
}
|
|
rx_pool->rx_buff = kcalloc(rx_pool->size,
|
sizeof(struct ibmvnic_rx_buff),
|
GFP_KERNEL);
|
if (!rx_pool->rx_buff) {
|
dev_err(dev, "Couldn't alloc rx buffers\n");
|
release_rx_pools(adapter);
|
return -1;
|
}
|
|
if (alloc_long_term_buff(adapter, &rx_pool->long_term_buff,
|
rx_pool->size * rx_pool->buff_size)) {
|
release_rx_pools(adapter);
|
return -1;
|
}
|
|
for (j = 0; j < rx_pool->size; ++j)
|
rx_pool->free_map[j] = j;
|
|
atomic_set(&rx_pool->available, 0);
|
rx_pool->next_alloc = 0;
|
rx_pool->next_free = 0;
|
}
|
|
return 0;
|
}
|
|
static int reset_one_tx_pool(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_tx_pool *tx_pool)
|
{
|
int rc, i;
|
|
rc = reset_long_term_buff(adapter, &tx_pool->long_term_buff);
|
if (rc)
|
return rc;
|
|
memset(tx_pool->tx_buff, 0,
|
tx_pool->num_buffers *
|
sizeof(struct ibmvnic_tx_buff));
|
|
for (i = 0; i < tx_pool->num_buffers; i++)
|
tx_pool->free_map[i] = i;
|
|
tx_pool->consumer_index = 0;
|
tx_pool->producer_index = 0;
|
|
return 0;
|
}
|
|
static int reset_tx_pools(struct ibmvnic_adapter *adapter)
|
{
|
int tx_scrqs;
|
int i, rc;
|
|
if (!adapter->tx_pool)
|
return -1;
|
|
tx_scrqs = adapter->num_active_tx_pools;
|
for (i = 0; i < tx_scrqs; i++) {
|
rc = reset_one_tx_pool(adapter, &adapter->tso_pool[i]);
|
if (rc)
|
return rc;
|
rc = reset_one_tx_pool(adapter, &adapter->tx_pool[i]);
|
if (rc)
|
return rc;
|
}
|
|
return 0;
|
}
|
|
static void release_vpd_data(struct ibmvnic_adapter *adapter)
|
{
|
if (!adapter->vpd)
|
return;
|
|
kfree(adapter->vpd->buff);
|
kfree(adapter->vpd);
|
|
adapter->vpd = NULL;
|
}
|
|
static void release_one_tx_pool(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_tx_pool *tx_pool)
|
{
|
kfree(tx_pool->tx_buff);
|
kfree(tx_pool->free_map);
|
free_long_term_buff(adapter, &tx_pool->long_term_buff);
|
}
|
|
static void release_tx_pools(struct ibmvnic_adapter *adapter)
|
{
|
int i;
|
|
if (!adapter->tx_pool)
|
return;
|
|
for (i = 0; i < adapter->num_active_tx_pools; i++) {
|
release_one_tx_pool(adapter, &adapter->tx_pool[i]);
|
release_one_tx_pool(adapter, &adapter->tso_pool[i]);
|
}
|
|
kfree(adapter->tx_pool);
|
adapter->tx_pool = NULL;
|
kfree(adapter->tso_pool);
|
adapter->tso_pool = NULL;
|
adapter->num_active_tx_pools = 0;
|
}
|
|
static int init_one_tx_pool(struct net_device *netdev,
|
struct ibmvnic_tx_pool *tx_pool,
|
int num_entries, int buf_size)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int i;
|
|
tx_pool->tx_buff = kcalloc(num_entries,
|
sizeof(struct ibmvnic_tx_buff),
|
GFP_KERNEL);
|
if (!tx_pool->tx_buff)
|
return -1;
|
|
if (alloc_long_term_buff(adapter, &tx_pool->long_term_buff,
|
num_entries * buf_size))
|
return -1;
|
|
tx_pool->free_map = kcalloc(num_entries, sizeof(int), GFP_KERNEL);
|
if (!tx_pool->free_map)
|
return -1;
|
|
for (i = 0; i < num_entries; i++)
|
tx_pool->free_map[i] = i;
|
|
tx_pool->consumer_index = 0;
|
tx_pool->producer_index = 0;
|
tx_pool->num_buffers = num_entries;
|
tx_pool->buf_size = buf_size;
|
|
return 0;
|
}
|
|
static int init_tx_pools(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int tx_subcrqs;
|
int i, rc;
|
|
tx_subcrqs = adapter->num_active_tx_scrqs;
|
adapter->tx_pool = kcalloc(tx_subcrqs,
|
sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
|
if (!adapter->tx_pool)
|
return -1;
|
|
adapter->tso_pool = kcalloc(tx_subcrqs,
|
sizeof(struct ibmvnic_tx_pool), GFP_KERNEL);
|
if (!adapter->tso_pool) {
|
kfree(adapter->tx_pool);
|
adapter->tx_pool = NULL;
|
return -1;
|
}
|
|
adapter->num_active_tx_pools = tx_subcrqs;
|
|
for (i = 0; i < tx_subcrqs; i++) {
|
rc = init_one_tx_pool(netdev, &adapter->tx_pool[i],
|
adapter->req_tx_entries_per_subcrq,
|
adapter->req_mtu + VLAN_HLEN);
|
if (rc) {
|
release_tx_pools(adapter);
|
return rc;
|
}
|
|
rc = init_one_tx_pool(netdev, &adapter->tso_pool[i],
|
IBMVNIC_TSO_BUFS,
|
IBMVNIC_TSO_BUF_SZ);
|
if (rc) {
|
release_tx_pools(adapter);
|
return rc;
|
}
|
}
|
|
return 0;
|
}
|
|
static void ibmvnic_napi_enable(struct ibmvnic_adapter *adapter)
|
{
|
int i;
|
|
if (adapter->napi_enabled)
|
return;
|
|
for (i = 0; i < adapter->req_rx_queues; i++)
|
napi_enable(&adapter->napi[i]);
|
|
adapter->napi_enabled = true;
|
}
|
|
static void ibmvnic_napi_disable(struct ibmvnic_adapter *adapter)
|
{
|
int i;
|
|
if (!adapter->napi_enabled)
|
return;
|
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
netdev_dbg(adapter->netdev, "Disabling napi[%d]\n", i);
|
napi_disable(&adapter->napi[i]);
|
}
|
|
adapter->napi_enabled = false;
|
}
|
|
static int init_napi(struct ibmvnic_adapter *adapter)
|
{
|
int i;
|
|
adapter->napi = kcalloc(adapter->req_rx_queues,
|
sizeof(struct napi_struct), GFP_KERNEL);
|
if (!adapter->napi)
|
return -ENOMEM;
|
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
netdev_dbg(adapter->netdev, "Adding napi[%d]\n", i);
|
netif_napi_add(adapter->netdev, &adapter->napi[i],
|
ibmvnic_poll, NAPI_POLL_WEIGHT);
|
}
|
|
adapter->num_active_rx_napi = adapter->req_rx_queues;
|
return 0;
|
}
|
|
static void release_napi(struct ibmvnic_adapter *adapter)
|
{
|
int i;
|
|
if (!adapter->napi)
|
return;
|
|
for (i = 0; i < adapter->num_active_rx_napi; i++) {
|
netdev_dbg(adapter->netdev, "Releasing napi[%d]\n", i);
|
netif_napi_del(&adapter->napi[i]);
|
}
|
|
kfree(adapter->napi);
|
adapter->napi = NULL;
|
adapter->num_active_rx_napi = 0;
|
adapter->napi_enabled = false;
|
}
|
|
static int ibmvnic_login(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
unsigned long timeout = msecs_to_jiffies(20000);
|
int retry_count = 0;
|
int retries = 10;
|
bool retry;
|
int rc;
|
|
do {
|
retry = false;
|
if (retry_count > retries) {
|
netdev_warn(netdev, "Login attempts exceeded\n");
|
return -1;
|
}
|
|
adapter->init_done_rc = 0;
|
reinit_completion(&adapter->init_done);
|
rc = send_login(adapter);
|
if (rc)
|
return rc;
|
|
if (!wait_for_completion_timeout(&adapter->init_done,
|
timeout)) {
|
netdev_warn(netdev, "Login timed out, retrying...\n");
|
retry = true;
|
adapter->init_done_rc = 0;
|
retry_count++;
|
continue;
|
}
|
|
if (adapter->init_done_rc == ABORTED) {
|
netdev_warn(netdev, "Login aborted, retrying...\n");
|
retry = true;
|
adapter->init_done_rc = 0;
|
retry_count++;
|
/* FW or device may be busy, so
|
* wait a bit before retrying login
|
*/
|
msleep(500);
|
} else if (adapter->init_done_rc == PARTIALSUCCESS) {
|
retry_count++;
|
release_sub_crqs(adapter, 1);
|
|
retry = true;
|
netdev_dbg(netdev,
|
"Received partial success, retrying...\n");
|
adapter->init_done_rc = 0;
|
reinit_completion(&adapter->init_done);
|
send_query_cap(adapter);
|
if (!wait_for_completion_timeout(&adapter->init_done,
|
timeout)) {
|
netdev_warn(netdev,
|
"Capabilities query timed out\n");
|
return -1;
|
}
|
|
rc = init_sub_crqs(adapter);
|
if (rc) {
|
netdev_warn(netdev,
|
"SCRQ initialization failed\n");
|
return -1;
|
}
|
|
rc = init_sub_crq_irqs(adapter);
|
if (rc) {
|
netdev_warn(netdev,
|
"SCRQ irq initialization failed\n");
|
return -1;
|
}
|
} else if (adapter->init_done_rc) {
|
netdev_warn(netdev, "Adapter login failed\n");
|
return -1;
|
}
|
} while (retry);
|
|
__ibmvnic_set_mac(netdev, adapter->mac_addr);
|
|
netdev_dbg(netdev, "[S:%d] Login succeeded\n", adapter->state);
|
return 0;
|
}
|
|
static void release_login_buffer(struct ibmvnic_adapter *adapter)
|
{
|
kfree(adapter->login_buf);
|
adapter->login_buf = NULL;
|
}
|
|
static void release_login_rsp_buffer(struct ibmvnic_adapter *adapter)
|
{
|
kfree(adapter->login_rsp_buf);
|
adapter->login_rsp_buf = NULL;
|
}
|
|
static void release_resources(struct ibmvnic_adapter *adapter)
|
{
|
release_vpd_data(adapter);
|
|
release_tx_pools(adapter);
|
release_rx_pools(adapter);
|
|
release_napi(adapter);
|
release_login_buffer(adapter);
|
release_login_rsp_buffer(adapter);
|
}
|
|
static int set_link_state(struct ibmvnic_adapter *adapter, u8 link_state)
|
{
|
struct net_device *netdev = adapter->netdev;
|
unsigned long timeout = msecs_to_jiffies(20000);
|
union ibmvnic_crq crq;
|
bool resend;
|
int rc;
|
|
netdev_dbg(netdev, "setting link state %d\n", link_state);
|
|
memset(&crq, 0, sizeof(crq));
|
crq.logical_link_state.first = IBMVNIC_CRQ_CMD;
|
crq.logical_link_state.cmd = LOGICAL_LINK_STATE;
|
crq.logical_link_state.link_state = link_state;
|
|
do {
|
resend = false;
|
|
reinit_completion(&adapter->init_done);
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc) {
|
netdev_err(netdev, "Failed to set link state\n");
|
return rc;
|
}
|
|
if (!wait_for_completion_timeout(&adapter->init_done,
|
timeout)) {
|
netdev_err(netdev, "timeout setting link state\n");
|
return -1;
|
}
|
|
if (adapter->init_done_rc == PARTIALSUCCESS) {
|
/* Partuial success, delay and re-send */
|
mdelay(1000);
|
resend = true;
|
} else if (adapter->init_done_rc) {
|
netdev_warn(netdev, "Unable to set link state, rc=%d\n",
|
adapter->init_done_rc);
|
return adapter->init_done_rc;
|
}
|
} while (resend);
|
|
return 0;
|
}
|
|
static int set_real_num_queues(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int rc;
|
|
netdev_dbg(netdev, "Setting real tx/rx queues (%llx/%llx)\n",
|
adapter->req_tx_queues, adapter->req_rx_queues);
|
|
rc = netif_set_real_num_tx_queues(netdev, adapter->req_tx_queues);
|
if (rc) {
|
netdev_err(netdev, "failed to set the number of tx queues\n");
|
return rc;
|
}
|
|
rc = netif_set_real_num_rx_queues(netdev, adapter->req_rx_queues);
|
if (rc)
|
netdev_err(netdev, "failed to set the number of rx queues\n");
|
|
return rc;
|
}
|
|
static int ibmvnic_get_vpd(struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
union ibmvnic_crq crq;
|
int len = 0;
|
int rc;
|
|
if (adapter->vpd->buff)
|
len = adapter->vpd->len;
|
|
mutex_lock(&adapter->fw_lock);
|
adapter->fw_done_rc = 0;
|
reinit_completion(&adapter->fw_done);
|
|
crq.get_vpd_size.first = IBMVNIC_CRQ_CMD;
|
crq.get_vpd_size.cmd = GET_VPD_SIZE;
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc) {
|
mutex_unlock(&adapter->fw_lock);
|
return rc;
|
}
|
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
|
if (rc) {
|
dev_err(dev, "Could not retrieve VPD size, rc = %d\n", rc);
|
mutex_unlock(&adapter->fw_lock);
|
return rc;
|
}
|
mutex_unlock(&adapter->fw_lock);
|
|
if (!adapter->vpd->len)
|
return -ENODATA;
|
|
if (!adapter->vpd->buff)
|
adapter->vpd->buff = kzalloc(adapter->vpd->len, GFP_KERNEL);
|
else if (adapter->vpd->len != len)
|
adapter->vpd->buff =
|
krealloc(adapter->vpd->buff,
|
adapter->vpd->len, GFP_KERNEL);
|
|
if (!adapter->vpd->buff) {
|
dev_err(dev, "Could allocate VPD buffer\n");
|
return -ENOMEM;
|
}
|
|
adapter->vpd->dma_addr =
|
dma_map_single(dev, adapter->vpd->buff, adapter->vpd->len,
|
DMA_FROM_DEVICE);
|
if (dma_mapping_error(dev, adapter->vpd->dma_addr)) {
|
dev_err(dev, "Could not map VPD buffer\n");
|
kfree(adapter->vpd->buff);
|
adapter->vpd->buff = NULL;
|
return -ENOMEM;
|
}
|
|
mutex_lock(&adapter->fw_lock);
|
adapter->fw_done_rc = 0;
|
reinit_completion(&adapter->fw_done);
|
|
crq.get_vpd.first = IBMVNIC_CRQ_CMD;
|
crq.get_vpd.cmd = GET_VPD;
|
crq.get_vpd.ioba = cpu_to_be32(adapter->vpd->dma_addr);
|
crq.get_vpd.len = cpu_to_be32((u32)adapter->vpd->len);
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc) {
|
kfree(adapter->vpd->buff);
|
adapter->vpd->buff = NULL;
|
mutex_unlock(&adapter->fw_lock);
|
return rc;
|
}
|
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
|
if (rc) {
|
dev_err(dev, "Unable to retrieve VPD, rc = %d\n", rc);
|
kfree(adapter->vpd->buff);
|
adapter->vpd->buff = NULL;
|
mutex_unlock(&adapter->fw_lock);
|
return rc;
|
}
|
|
mutex_unlock(&adapter->fw_lock);
|
return 0;
|
}
|
|
static int init_resources(struct ibmvnic_adapter *adapter)
|
{
|
struct net_device *netdev = adapter->netdev;
|
int rc;
|
|
rc = set_real_num_queues(netdev);
|
if (rc)
|
return rc;
|
|
adapter->vpd = kzalloc(sizeof(*adapter->vpd), GFP_KERNEL);
|
if (!adapter->vpd)
|
return -ENOMEM;
|
|
/* Vital Product Data (VPD) */
|
rc = ibmvnic_get_vpd(adapter);
|
if (rc) {
|
netdev_err(netdev, "failed to initialize Vital Product Data (VPD)\n");
|
return rc;
|
}
|
|
adapter->map_id = 1;
|
|
rc = init_napi(adapter);
|
if (rc)
|
return rc;
|
|
send_query_map(adapter);
|
|
rc = init_rx_pools(netdev);
|
if (rc)
|
return rc;
|
|
rc = init_tx_pools(netdev);
|
return rc;
|
}
|
|
static int __ibmvnic_open(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
enum vnic_state prev_state = adapter->state;
|
int i, rc;
|
|
adapter->state = VNIC_OPENING;
|
replenish_pools(adapter);
|
ibmvnic_napi_enable(adapter);
|
|
/* We're ready to receive frames, enable the sub-crq interrupts and
|
* set the logical link state to up
|
*/
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
netdev_dbg(netdev, "Enabling rx_scrq[%d] irq\n", i);
|
if (prev_state == VNIC_CLOSED)
|
enable_irq(adapter->rx_scrq[i]->irq);
|
enable_scrq_irq(adapter, adapter->rx_scrq[i]);
|
}
|
|
for (i = 0; i < adapter->req_tx_queues; i++) {
|
netdev_dbg(netdev, "Enabling tx_scrq[%d] irq\n", i);
|
if (prev_state == VNIC_CLOSED)
|
enable_irq(adapter->tx_scrq[i]->irq);
|
enable_scrq_irq(adapter, adapter->tx_scrq[i]);
|
}
|
|
rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_UP);
|
if (rc) {
|
ibmvnic_napi_disable(adapter);
|
release_resources(adapter);
|
return rc;
|
}
|
|
netif_tx_start_all_queues(netdev);
|
|
if (prev_state == VNIC_CLOSED) {
|
for (i = 0; i < adapter->req_rx_queues; i++)
|
napi_schedule(&adapter->napi[i]);
|
}
|
|
adapter->state = VNIC_OPEN;
|
return rc;
|
}
|
|
static int ibmvnic_open(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int rc;
|
|
/* If device failover is pending, just set device state and return.
|
* Device operation will be handled by reset routine.
|
*/
|
if (adapter->failover_pending) {
|
adapter->state = VNIC_OPEN;
|
return 0;
|
}
|
|
if (adapter->state != VNIC_CLOSED) {
|
rc = ibmvnic_login(netdev);
|
if (rc)
|
goto out;
|
|
rc = init_resources(adapter);
|
if (rc) {
|
netdev_err(netdev, "failed to initialize resources\n");
|
release_resources(adapter);
|
goto out;
|
}
|
}
|
|
rc = __ibmvnic_open(netdev);
|
|
out:
|
/*
|
* If open fails due to a pending failover, set device state and
|
* return. Device operation will be handled by reset routine.
|
*/
|
if (rc && adapter->failover_pending) {
|
adapter->state = VNIC_OPEN;
|
rc = 0;
|
}
|
return rc;
|
}
|
|
static void clean_rx_pools(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_rx_pool *rx_pool;
|
struct ibmvnic_rx_buff *rx_buff;
|
u64 rx_entries;
|
int rx_scrqs;
|
int i, j;
|
|
if (!adapter->rx_pool)
|
return;
|
|
rx_scrqs = adapter->num_active_rx_pools;
|
rx_entries = adapter->req_rx_add_entries_per_subcrq;
|
|
/* Free any remaining skbs in the rx buffer pools */
|
for (i = 0; i < rx_scrqs; i++) {
|
rx_pool = &adapter->rx_pool[i];
|
if (!rx_pool || !rx_pool->rx_buff)
|
continue;
|
|
netdev_dbg(adapter->netdev, "Cleaning rx_pool[%d]\n", i);
|
for (j = 0; j < rx_entries; j++) {
|
rx_buff = &rx_pool->rx_buff[j];
|
if (rx_buff && rx_buff->skb) {
|
dev_kfree_skb_any(rx_buff->skb);
|
rx_buff->skb = NULL;
|
}
|
}
|
}
|
}
|
|
static void clean_one_tx_pool(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_tx_pool *tx_pool)
|
{
|
struct ibmvnic_tx_buff *tx_buff;
|
u64 tx_entries;
|
int i;
|
|
if (!tx_pool || !tx_pool->tx_buff)
|
return;
|
|
tx_entries = tx_pool->num_buffers;
|
|
for (i = 0; i < tx_entries; i++) {
|
tx_buff = &tx_pool->tx_buff[i];
|
if (tx_buff && tx_buff->skb) {
|
dev_kfree_skb_any(tx_buff->skb);
|
tx_buff->skb = NULL;
|
}
|
}
|
}
|
|
static void clean_tx_pools(struct ibmvnic_adapter *adapter)
|
{
|
int tx_scrqs;
|
int i;
|
|
if (!adapter->tx_pool || !adapter->tso_pool)
|
return;
|
|
tx_scrqs = adapter->num_active_tx_pools;
|
|
/* Free any remaining skbs in the tx buffer pools */
|
for (i = 0; i < tx_scrqs; i++) {
|
netdev_dbg(adapter->netdev, "Cleaning tx_pool[%d]\n", i);
|
clean_one_tx_pool(adapter, &adapter->tx_pool[i]);
|
clean_one_tx_pool(adapter, &adapter->tso_pool[i]);
|
}
|
}
|
|
static void ibmvnic_disable_irqs(struct ibmvnic_adapter *adapter)
|
{
|
struct net_device *netdev = adapter->netdev;
|
int i;
|
|
if (adapter->tx_scrq) {
|
for (i = 0; i < adapter->req_tx_queues; i++)
|
if (adapter->tx_scrq[i]->irq) {
|
netdev_dbg(netdev,
|
"Disabling tx_scrq[%d] irq\n", i);
|
disable_scrq_irq(adapter, adapter->tx_scrq[i]);
|
disable_irq(adapter->tx_scrq[i]->irq);
|
}
|
}
|
|
if (adapter->rx_scrq) {
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
if (adapter->rx_scrq[i]->irq) {
|
netdev_dbg(netdev,
|
"Disabling rx_scrq[%d] irq\n", i);
|
disable_scrq_irq(adapter, adapter->rx_scrq[i]);
|
disable_irq(adapter->rx_scrq[i]->irq);
|
}
|
}
|
}
|
}
|
|
static void ibmvnic_cleanup(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
/* ensure that transmissions are stopped if called by do_reset */
|
if (test_bit(0, &adapter->resetting))
|
netif_tx_disable(netdev);
|
else
|
netif_tx_stop_all_queues(netdev);
|
|
ibmvnic_napi_disable(adapter);
|
ibmvnic_disable_irqs(adapter);
|
|
clean_rx_pools(adapter);
|
clean_tx_pools(adapter);
|
}
|
|
static int __ibmvnic_close(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int rc = 0;
|
|
adapter->state = VNIC_CLOSING;
|
rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
|
adapter->state = VNIC_CLOSED;
|
return rc;
|
}
|
|
static int ibmvnic_close(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int rc;
|
|
netdev_dbg(netdev, "[S:%d FOP:%d FRR:%d] Closing\n",
|
adapter->state, adapter->failover_pending,
|
adapter->force_reset_recovery);
|
|
/* If device failover is pending, just set device state and return.
|
* Device operation will be handled by reset routine.
|
*/
|
if (adapter->failover_pending) {
|
adapter->state = VNIC_CLOSED;
|
return 0;
|
}
|
|
rc = __ibmvnic_close(netdev);
|
ibmvnic_cleanup(netdev);
|
|
return rc;
|
}
|
|
/**
|
* build_hdr_data - creates L2/L3/L4 header data buffer
|
* @hdr_field - bitfield determining needed headers
|
* @skb - socket buffer
|
* @hdr_len - array of header lengths
|
* @tot_len - total length of data
|
*
|
* Reads hdr_field to determine which headers are needed by firmware.
|
* Builds a buffer containing these headers. Saves individual header
|
* lengths and total buffer length to be used to build descriptors.
|
*/
|
static int build_hdr_data(u8 hdr_field, struct sk_buff *skb,
|
int *hdr_len, u8 *hdr_data)
|
{
|
int len = 0;
|
u8 *hdr;
|
|
if (skb_vlan_tagged(skb) && !skb_vlan_tag_present(skb))
|
hdr_len[0] = sizeof(struct vlan_ethhdr);
|
else
|
hdr_len[0] = sizeof(struct ethhdr);
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
hdr_len[1] = ip_hdr(skb)->ihl * 4;
|
if (ip_hdr(skb)->protocol == IPPROTO_TCP)
|
hdr_len[2] = tcp_hdrlen(skb);
|
else if (ip_hdr(skb)->protocol == IPPROTO_UDP)
|
hdr_len[2] = sizeof(struct udphdr);
|
} else if (skb->protocol == htons(ETH_P_IPV6)) {
|
hdr_len[1] = sizeof(struct ipv6hdr);
|
if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
|
hdr_len[2] = tcp_hdrlen(skb);
|
else if (ipv6_hdr(skb)->nexthdr == IPPROTO_UDP)
|
hdr_len[2] = sizeof(struct udphdr);
|
} else if (skb->protocol == htons(ETH_P_ARP)) {
|
hdr_len[1] = arp_hdr_len(skb->dev);
|
hdr_len[2] = 0;
|
}
|
|
memset(hdr_data, 0, 120);
|
if ((hdr_field >> 6) & 1) {
|
hdr = skb_mac_header(skb);
|
memcpy(hdr_data, hdr, hdr_len[0]);
|
len += hdr_len[0];
|
}
|
|
if ((hdr_field >> 5) & 1) {
|
hdr = skb_network_header(skb);
|
memcpy(hdr_data + len, hdr, hdr_len[1]);
|
len += hdr_len[1];
|
}
|
|
if ((hdr_field >> 4) & 1) {
|
hdr = skb_transport_header(skb);
|
memcpy(hdr_data + len, hdr, hdr_len[2]);
|
len += hdr_len[2];
|
}
|
return len;
|
}
|
|
/**
|
* create_hdr_descs - create header and header extension descriptors
|
* @hdr_field - bitfield determining needed headers
|
* @data - buffer containing header data
|
* @len - length of data buffer
|
* @hdr_len - array of individual header lengths
|
* @scrq_arr - descriptor array
|
*
|
* Creates header and, if needed, header extension descriptors and
|
* places them in a descriptor array, scrq_arr
|
*/
|
|
static int create_hdr_descs(u8 hdr_field, u8 *hdr_data, int len, int *hdr_len,
|
union sub_crq *scrq_arr)
|
{
|
union sub_crq hdr_desc;
|
int tmp_len = len;
|
int num_descs = 0;
|
u8 *data, *cur;
|
int tmp;
|
|
while (tmp_len > 0) {
|
cur = hdr_data + len - tmp_len;
|
|
memset(&hdr_desc, 0, sizeof(hdr_desc));
|
if (cur != hdr_data) {
|
data = hdr_desc.hdr_ext.data;
|
tmp = tmp_len > 29 ? 29 : tmp_len;
|
hdr_desc.hdr_ext.first = IBMVNIC_CRQ_CMD;
|
hdr_desc.hdr_ext.type = IBMVNIC_HDR_EXT_DESC;
|
hdr_desc.hdr_ext.len = tmp;
|
} else {
|
data = hdr_desc.hdr.data;
|
tmp = tmp_len > 24 ? 24 : tmp_len;
|
hdr_desc.hdr.first = IBMVNIC_CRQ_CMD;
|
hdr_desc.hdr.type = IBMVNIC_HDR_DESC;
|
hdr_desc.hdr.len = tmp;
|
hdr_desc.hdr.l2_len = (u8)hdr_len[0];
|
hdr_desc.hdr.l3_len = cpu_to_be16((u16)hdr_len[1]);
|
hdr_desc.hdr.l4_len = (u8)hdr_len[2];
|
hdr_desc.hdr.flag = hdr_field << 1;
|
}
|
memcpy(data, cur, tmp);
|
tmp_len -= tmp;
|
*scrq_arr = hdr_desc;
|
scrq_arr++;
|
num_descs++;
|
}
|
|
return num_descs;
|
}
|
|
/**
|
* build_hdr_descs_arr - build a header descriptor array
|
* @skb - socket buffer
|
* @num_entries - number of descriptors to be sent
|
* @subcrq - first TX descriptor
|
* @hdr_field - bit field determining which headers will be sent
|
*
|
* This function will build a TX descriptor array with applicable
|
* L2/L3/L4 packet header descriptors to be sent by send_subcrq_indirect.
|
*/
|
|
static void build_hdr_descs_arr(struct ibmvnic_tx_buff *txbuff,
|
int *num_entries, u8 hdr_field)
|
{
|
int hdr_len[3] = {0, 0, 0};
|
int tot_len;
|
u8 *hdr_data = txbuff->hdr_data;
|
|
tot_len = build_hdr_data(hdr_field, txbuff->skb, hdr_len,
|
txbuff->hdr_data);
|
*num_entries += create_hdr_descs(hdr_field, hdr_data, tot_len, hdr_len,
|
txbuff->indir_arr + 1);
|
}
|
|
static int ibmvnic_xmit_workarounds(struct sk_buff *skb,
|
struct net_device *netdev)
|
{
|
/* For some backing devices, mishandling of small packets
|
* can result in a loss of connection or TX stall. Device
|
* architects recommend that no packet should be smaller
|
* than the minimum MTU value provided to the driver, so
|
* pad any packets to that length
|
*/
|
if (skb->len < netdev->min_mtu)
|
return skb_put_padto(skb, netdev->min_mtu);
|
|
return 0;
|
}
|
|
static netdev_tx_t ibmvnic_xmit(struct sk_buff *skb, struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int queue_num = skb_get_queue_mapping(skb);
|
u8 *hdrs = (u8 *)&adapter->tx_rx_desc_req;
|
struct device *dev = &adapter->vdev->dev;
|
struct ibmvnic_tx_buff *tx_buff = NULL;
|
struct ibmvnic_sub_crq_queue *tx_scrq;
|
struct ibmvnic_tx_pool *tx_pool;
|
unsigned int tx_send_failed = 0;
|
unsigned int tx_map_failed = 0;
|
unsigned int tx_dropped = 0;
|
unsigned int tx_packets = 0;
|
unsigned int tx_bytes = 0;
|
dma_addr_t data_dma_addr;
|
struct netdev_queue *txq;
|
unsigned long lpar_rc;
|
union sub_crq tx_crq;
|
unsigned int offset;
|
int num_entries = 1;
|
unsigned char *dst;
|
int index = 0;
|
u8 proto = 0;
|
u64 handle;
|
netdev_tx_t ret = NETDEV_TX_OK;
|
|
if (test_bit(0, &adapter->resetting)) {
|
dev_kfree_skb_any(skb);
|
|
tx_send_failed++;
|
tx_dropped++;
|
ret = NETDEV_TX_OK;
|
goto out;
|
}
|
|
if (ibmvnic_xmit_workarounds(skb, netdev)) {
|
tx_dropped++;
|
tx_send_failed++;
|
ret = NETDEV_TX_OK;
|
goto out;
|
}
|
if (skb_is_gso(skb))
|
tx_pool = &adapter->tso_pool[queue_num];
|
else
|
tx_pool = &adapter->tx_pool[queue_num];
|
|
tx_scrq = adapter->tx_scrq[queue_num];
|
txq = netdev_get_tx_queue(netdev, skb_get_queue_mapping(skb));
|
handle = tx_scrq->handle;
|
|
index = tx_pool->free_map[tx_pool->consumer_index];
|
|
if (index == IBMVNIC_INVALID_MAP) {
|
dev_kfree_skb_any(skb);
|
tx_send_failed++;
|
tx_dropped++;
|
ret = NETDEV_TX_OK;
|
goto out;
|
}
|
|
tx_pool->free_map[tx_pool->consumer_index] = IBMVNIC_INVALID_MAP;
|
|
offset = index * tx_pool->buf_size;
|
dst = tx_pool->long_term_buff.buff + offset;
|
memset(dst, 0, tx_pool->buf_size);
|
data_dma_addr = tx_pool->long_term_buff.addr + offset;
|
|
if (skb_shinfo(skb)->nr_frags) {
|
int cur, i;
|
|
/* Copy the head */
|
skb_copy_from_linear_data(skb, dst, skb_headlen(skb));
|
cur = skb_headlen(skb);
|
|
/* Copy the frags */
|
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
|
|
memcpy(dst + cur,
|
page_address(skb_frag_page(frag)) +
|
skb_frag_off(frag), skb_frag_size(frag));
|
cur += skb_frag_size(frag);
|
}
|
} else {
|
skb_copy_from_linear_data(skb, dst, skb->len);
|
}
|
|
/* post changes to long_term_buff *dst before VIOS accessing it */
|
dma_wmb();
|
|
tx_pool->consumer_index =
|
(tx_pool->consumer_index + 1) % tx_pool->num_buffers;
|
|
tx_buff = &tx_pool->tx_buff[index];
|
tx_buff->skb = skb;
|
tx_buff->data_dma[0] = data_dma_addr;
|
tx_buff->data_len[0] = skb->len;
|
tx_buff->index = index;
|
tx_buff->pool_index = queue_num;
|
tx_buff->last_frag = true;
|
|
memset(&tx_crq, 0, sizeof(tx_crq));
|
tx_crq.v1.first = IBMVNIC_CRQ_CMD;
|
tx_crq.v1.type = IBMVNIC_TX_DESC;
|
tx_crq.v1.n_crq_elem = 1;
|
tx_crq.v1.n_sge = 1;
|
tx_crq.v1.flags1 = IBMVNIC_TX_COMP_NEEDED;
|
|
if (skb_is_gso(skb))
|
tx_crq.v1.correlator =
|
cpu_to_be32(index | IBMVNIC_TSO_POOL_MASK);
|
else
|
tx_crq.v1.correlator = cpu_to_be32(index);
|
tx_crq.v1.dma_reg = cpu_to_be16(tx_pool->long_term_buff.map_id);
|
tx_crq.v1.sge_len = cpu_to_be32(skb->len);
|
tx_crq.v1.ioba = cpu_to_be64(data_dma_addr);
|
|
if (adapter->vlan_header_insertion && skb_vlan_tag_present(skb)) {
|
tx_crq.v1.flags2 |= IBMVNIC_TX_VLAN_INSERT;
|
tx_crq.v1.vlan_id = cpu_to_be16(skb->vlan_tci);
|
}
|
|
if (skb->protocol == htons(ETH_P_IP)) {
|
tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV4;
|
proto = ip_hdr(skb)->protocol;
|
} else if (skb->protocol == htons(ETH_P_IPV6)) {
|
tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_IPV6;
|
proto = ipv6_hdr(skb)->nexthdr;
|
}
|
|
if (proto == IPPROTO_TCP)
|
tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_TCP;
|
else if (proto == IPPROTO_UDP)
|
tx_crq.v1.flags1 |= IBMVNIC_TX_PROT_UDP;
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
tx_crq.v1.flags1 |= IBMVNIC_TX_CHKSUM_OFFLOAD;
|
hdrs += 2;
|
}
|
if (skb_is_gso(skb)) {
|
tx_crq.v1.flags1 |= IBMVNIC_TX_LSO;
|
tx_crq.v1.mss = cpu_to_be16(skb_shinfo(skb)->gso_size);
|
hdrs += 2;
|
}
|
/* determine if l2/3/4 headers are sent to firmware */
|
if ((*hdrs >> 7) & 1) {
|
build_hdr_descs_arr(tx_buff, &num_entries, *hdrs);
|
tx_crq.v1.n_crq_elem = num_entries;
|
tx_buff->num_entries = num_entries;
|
tx_buff->indir_arr[0] = tx_crq;
|
tx_buff->indir_dma = dma_map_single(dev, tx_buff->indir_arr,
|
sizeof(tx_buff->indir_arr),
|
DMA_TO_DEVICE);
|
if (dma_mapping_error(dev, tx_buff->indir_dma)) {
|
dev_kfree_skb_any(skb);
|
tx_buff->skb = NULL;
|
if (!firmware_has_feature(FW_FEATURE_CMO))
|
dev_err(dev, "tx: unable to map descriptor array\n");
|
tx_map_failed++;
|
tx_dropped++;
|
ret = NETDEV_TX_OK;
|
goto tx_err_out;
|
}
|
lpar_rc = send_subcrq_indirect(adapter, handle,
|
(u64)tx_buff->indir_dma,
|
(u64)num_entries);
|
dma_unmap_single(dev, tx_buff->indir_dma,
|
sizeof(tx_buff->indir_arr), DMA_TO_DEVICE);
|
} else {
|
tx_buff->num_entries = num_entries;
|
lpar_rc = send_subcrq(adapter, handle,
|
&tx_crq);
|
}
|
if (lpar_rc != H_SUCCESS) {
|
if (lpar_rc != H_CLOSED && lpar_rc != H_PARAMETER)
|
dev_err_ratelimited(dev, "tx: send failed\n");
|
dev_kfree_skb_any(skb);
|
tx_buff->skb = NULL;
|
|
if (lpar_rc == H_CLOSED || adapter->failover_pending) {
|
/* Disable TX and report carrier off if queue is closed
|
* or pending failover.
|
* Firmware guarantees that a signal will be sent to the
|
* driver, triggering a reset or some other action.
|
*/
|
netif_tx_stop_all_queues(netdev);
|
netif_carrier_off(netdev);
|
}
|
|
tx_send_failed++;
|
tx_dropped++;
|
ret = NETDEV_TX_OK;
|
goto tx_err_out;
|
}
|
|
if (atomic_add_return(num_entries, &tx_scrq->used)
|
>= adapter->req_tx_entries_per_subcrq) {
|
netdev_dbg(netdev, "Stopping queue %d\n", queue_num);
|
netif_stop_subqueue(netdev, queue_num);
|
}
|
|
tx_packets++;
|
tx_bytes += skb->len;
|
txq->trans_start = jiffies;
|
ret = NETDEV_TX_OK;
|
goto out;
|
|
tx_err_out:
|
/* roll back consumer index and map array*/
|
if (tx_pool->consumer_index == 0)
|
tx_pool->consumer_index =
|
tx_pool->num_buffers - 1;
|
else
|
tx_pool->consumer_index--;
|
tx_pool->free_map[tx_pool->consumer_index] = index;
|
out:
|
netdev->stats.tx_dropped += tx_dropped;
|
netdev->stats.tx_bytes += tx_bytes;
|
netdev->stats.tx_packets += tx_packets;
|
adapter->tx_send_failed += tx_send_failed;
|
adapter->tx_map_failed += tx_map_failed;
|
adapter->tx_stats_buffers[queue_num].packets += tx_packets;
|
adapter->tx_stats_buffers[queue_num].bytes += tx_bytes;
|
adapter->tx_stats_buffers[queue_num].dropped_packets += tx_dropped;
|
|
return ret;
|
}
|
|
static void ibmvnic_set_multi(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
struct netdev_hw_addr *ha;
|
union ibmvnic_crq crq;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.request_capability.first = IBMVNIC_CRQ_CMD;
|
crq.request_capability.cmd = REQUEST_CAPABILITY;
|
|
if (netdev->flags & IFF_PROMISC) {
|
if (!adapter->promisc_supported)
|
return;
|
} else {
|
if (netdev->flags & IFF_ALLMULTI) {
|
/* Accept all multicast */
|
memset(&crq, 0, sizeof(crq));
|
crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
|
crq.multicast_ctrl.cmd = MULTICAST_CTRL;
|
crq.multicast_ctrl.flags = IBMVNIC_ENABLE_ALL;
|
ibmvnic_send_crq(adapter, &crq);
|
} else if (netdev_mc_empty(netdev)) {
|
/* Reject all multicast */
|
memset(&crq, 0, sizeof(crq));
|
crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
|
crq.multicast_ctrl.cmd = MULTICAST_CTRL;
|
crq.multicast_ctrl.flags = IBMVNIC_DISABLE_ALL;
|
ibmvnic_send_crq(adapter, &crq);
|
} else {
|
/* Accept one or more multicast(s) */
|
netdev_for_each_mc_addr(ha, netdev) {
|
memset(&crq, 0, sizeof(crq));
|
crq.multicast_ctrl.first = IBMVNIC_CRQ_CMD;
|
crq.multicast_ctrl.cmd = MULTICAST_CTRL;
|
crq.multicast_ctrl.flags = IBMVNIC_ENABLE_MC;
|
ether_addr_copy(&crq.multicast_ctrl.mac_addr[0],
|
ha->addr);
|
ibmvnic_send_crq(adapter, &crq);
|
}
|
}
|
}
|
}
|
|
static int __ibmvnic_set_mac(struct net_device *netdev, u8 *dev_addr)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
union ibmvnic_crq crq;
|
int rc;
|
|
if (!is_valid_ether_addr(dev_addr)) {
|
rc = -EADDRNOTAVAIL;
|
goto err;
|
}
|
|
memset(&crq, 0, sizeof(crq));
|
crq.change_mac_addr.first = IBMVNIC_CRQ_CMD;
|
crq.change_mac_addr.cmd = CHANGE_MAC_ADDR;
|
ether_addr_copy(&crq.change_mac_addr.mac_addr[0], dev_addr);
|
|
mutex_lock(&adapter->fw_lock);
|
adapter->fw_done_rc = 0;
|
reinit_completion(&adapter->fw_done);
|
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc) {
|
rc = -EIO;
|
mutex_unlock(&adapter->fw_lock);
|
goto err;
|
}
|
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
|
/* netdev->dev_addr is changed in handle_change_mac_rsp function */
|
if (rc || adapter->fw_done_rc) {
|
rc = -EIO;
|
mutex_unlock(&adapter->fw_lock);
|
goto err;
|
}
|
mutex_unlock(&adapter->fw_lock);
|
return 0;
|
err:
|
ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
|
return rc;
|
}
|
|
static int ibmvnic_set_mac(struct net_device *netdev, void *p)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
struct sockaddr *addr = p;
|
int rc;
|
|
rc = 0;
|
if (!is_valid_ether_addr(addr->sa_data))
|
return -EADDRNOTAVAIL;
|
|
ether_addr_copy(adapter->mac_addr, addr->sa_data);
|
if (adapter->state != VNIC_PROBED)
|
rc = __ibmvnic_set_mac(netdev, addr->sa_data);
|
|
return rc;
|
}
|
|
/**
|
* do_change_param_reset returns zero if we are able to keep processing reset
|
* events, or non-zero if we hit a fatal error and must halt.
|
*/
|
static int do_change_param_reset(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_rwi *rwi,
|
u32 reset_state)
|
{
|
struct net_device *netdev = adapter->netdev;
|
int i, rc;
|
|
netdev_dbg(adapter->netdev, "Change param resetting driver (%d)\n",
|
rwi->reset_reason);
|
|
netif_carrier_off(netdev);
|
adapter->reset_reason = rwi->reset_reason;
|
|
ibmvnic_cleanup(netdev);
|
|
if (reset_state == VNIC_OPEN) {
|
rc = __ibmvnic_close(netdev);
|
if (rc)
|
goto out;
|
}
|
|
release_resources(adapter);
|
release_sub_crqs(adapter, 1);
|
release_crq_queue(adapter);
|
|
adapter->state = VNIC_PROBED;
|
|
rc = init_crq_queue(adapter);
|
|
if (rc) {
|
netdev_err(adapter->netdev,
|
"Couldn't initialize crq. rc=%d\n", rc);
|
return rc;
|
}
|
|
rc = ibmvnic_reset_init(adapter, true);
|
if (rc) {
|
rc = IBMVNIC_INIT_FAILED;
|
goto out;
|
}
|
|
/* If the adapter was in PROBE state prior to the reset,
|
* exit here.
|
*/
|
if (reset_state == VNIC_PROBED)
|
goto out;
|
|
rc = ibmvnic_login(netdev);
|
if (rc) {
|
goto out;
|
}
|
|
rc = init_resources(adapter);
|
if (rc)
|
goto out;
|
|
ibmvnic_disable_irqs(adapter);
|
|
adapter->state = VNIC_CLOSED;
|
|
if (reset_state == VNIC_CLOSED)
|
return 0;
|
|
rc = __ibmvnic_open(netdev);
|
if (rc) {
|
rc = IBMVNIC_OPEN_FAILED;
|
goto out;
|
}
|
|
/* refresh device's multicast list */
|
ibmvnic_set_multi(netdev);
|
|
/* kick napi */
|
for (i = 0; i < adapter->req_rx_queues; i++)
|
napi_schedule(&adapter->napi[i]);
|
|
out:
|
if (rc)
|
adapter->state = reset_state;
|
return rc;
|
}
|
|
/**
|
* do_reset returns zero if we are able to keep processing reset events, or
|
* non-zero if we hit a fatal error and must halt.
|
*/
|
static int do_reset(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_rwi *rwi, u32 reset_state)
|
{
|
u64 old_num_rx_queues, old_num_tx_queues;
|
u64 old_num_rx_slots, old_num_tx_slots;
|
struct net_device *netdev = adapter->netdev;
|
int rc;
|
|
netdev_dbg(adapter->netdev,
|
"[S:%d FOP:%d] Reset reason %d, reset_state %d\n",
|
adapter->state, adapter->failover_pending,
|
rwi->reset_reason, reset_state);
|
|
rtnl_lock();
|
/*
|
* Now that we have the rtnl lock, clear any pending failover.
|
* This will ensure ibmvnic_open() has either completed or will
|
* block until failover is complete.
|
*/
|
if (rwi->reset_reason == VNIC_RESET_FAILOVER)
|
adapter->failover_pending = false;
|
|
netif_carrier_off(netdev);
|
adapter->reset_reason = rwi->reset_reason;
|
|
old_num_rx_queues = adapter->req_rx_queues;
|
old_num_tx_queues = adapter->req_tx_queues;
|
old_num_rx_slots = adapter->req_rx_add_entries_per_subcrq;
|
old_num_tx_slots = adapter->req_tx_entries_per_subcrq;
|
|
ibmvnic_cleanup(netdev);
|
|
if (reset_state == VNIC_OPEN &&
|
adapter->reset_reason != VNIC_RESET_MOBILITY &&
|
adapter->reset_reason != VNIC_RESET_FAILOVER) {
|
adapter->state = VNIC_CLOSING;
|
|
/* Release the RTNL lock before link state change and
|
* re-acquire after the link state change to allow
|
* linkwatch_event to grab the RTNL lock and run during
|
* a reset.
|
*/
|
rtnl_unlock();
|
rc = set_link_state(adapter, IBMVNIC_LOGICAL_LNK_DN);
|
rtnl_lock();
|
if (rc)
|
goto out;
|
|
if (adapter->state != VNIC_CLOSING) {
|
rc = -1;
|
goto out;
|
}
|
|
adapter->state = VNIC_CLOSED;
|
}
|
|
if (adapter->reset_reason != VNIC_RESET_NON_FATAL) {
|
/* remove the closed state so when we call open it appears
|
* we are coming from the probed state.
|
*/
|
adapter->state = VNIC_PROBED;
|
|
if (adapter->reset_reason == VNIC_RESET_MOBILITY) {
|
rc = ibmvnic_reenable_crq_queue(adapter);
|
release_sub_crqs(adapter, 1);
|
} else {
|
rc = ibmvnic_reset_crq(adapter);
|
if (rc == H_CLOSED || rc == H_SUCCESS) {
|
rc = vio_enable_interrupts(adapter->vdev);
|
if (rc)
|
netdev_err(adapter->netdev,
|
"Reset failed to enable interrupts. rc=%d\n",
|
rc);
|
}
|
}
|
|
if (rc) {
|
netdev_err(adapter->netdev,
|
"Reset couldn't initialize crq. rc=%d\n", rc);
|
goto out;
|
}
|
|
rc = ibmvnic_reset_init(adapter, true);
|
if (rc) {
|
rc = IBMVNIC_INIT_FAILED;
|
goto out;
|
}
|
|
/* If the adapter was in PROBE state prior to the reset,
|
* exit here.
|
*/
|
if (reset_state == VNIC_PROBED) {
|
rc = 0;
|
goto out;
|
}
|
|
rc = ibmvnic_login(netdev);
|
if (rc) {
|
goto out;
|
}
|
|
if (adapter->req_rx_queues != old_num_rx_queues ||
|
adapter->req_tx_queues != old_num_tx_queues ||
|
adapter->req_rx_add_entries_per_subcrq !=
|
old_num_rx_slots ||
|
adapter->req_tx_entries_per_subcrq !=
|
old_num_tx_slots ||
|
!adapter->rx_pool ||
|
!adapter->tso_pool ||
|
!adapter->tx_pool) {
|
release_rx_pools(adapter);
|
release_tx_pools(adapter);
|
release_napi(adapter);
|
release_vpd_data(adapter);
|
|
rc = init_resources(adapter);
|
if (rc)
|
goto out;
|
|
} else {
|
rc = reset_tx_pools(adapter);
|
if (rc) {
|
netdev_dbg(adapter->netdev, "reset tx pools failed (%d)\n",
|
rc);
|
goto out;
|
}
|
|
rc = reset_rx_pools(adapter);
|
if (rc) {
|
netdev_dbg(adapter->netdev, "reset rx pools failed (%d)\n",
|
rc);
|
goto out;
|
}
|
}
|
ibmvnic_disable_irqs(adapter);
|
}
|
adapter->state = VNIC_CLOSED;
|
|
if (reset_state == VNIC_CLOSED) {
|
rc = 0;
|
goto out;
|
}
|
|
rc = __ibmvnic_open(netdev);
|
if (rc) {
|
rc = IBMVNIC_OPEN_FAILED;
|
goto out;
|
}
|
|
/* refresh device's multicast list */
|
ibmvnic_set_multi(netdev);
|
|
if (adapter->reset_reason == VNIC_RESET_FAILOVER ||
|
adapter->reset_reason == VNIC_RESET_MOBILITY) {
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
|
call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
|
}
|
|
rc = 0;
|
|
out:
|
/* restore the adapter state if reset failed */
|
if (rc)
|
adapter->state = reset_state;
|
rtnl_unlock();
|
|
netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Reset done, rc %d\n",
|
adapter->state, adapter->failover_pending, rc);
|
return rc;
|
}
|
|
static int do_hard_reset(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_rwi *rwi, u32 reset_state)
|
{
|
struct net_device *netdev = adapter->netdev;
|
int rc;
|
|
netdev_dbg(adapter->netdev, "Hard resetting driver (%d)\n",
|
rwi->reset_reason);
|
|
netif_carrier_off(netdev);
|
adapter->reset_reason = rwi->reset_reason;
|
|
ibmvnic_cleanup(netdev);
|
release_resources(adapter);
|
release_sub_crqs(adapter, 0);
|
release_crq_queue(adapter);
|
|
/* remove the closed state so when we call open it appears
|
* we are coming from the probed state.
|
*/
|
adapter->state = VNIC_PROBED;
|
|
reinit_completion(&adapter->init_done);
|
rc = init_crq_queue(adapter);
|
if (rc) {
|
netdev_err(adapter->netdev,
|
"Couldn't initialize crq. rc=%d\n", rc);
|
goto out;
|
}
|
|
rc = ibmvnic_reset_init(adapter, false);
|
if (rc)
|
goto out;
|
|
/* If the adapter was in PROBE state prior to the reset,
|
* exit here.
|
*/
|
if (reset_state == VNIC_PROBED)
|
goto out;
|
|
rc = ibmvnic_login(netdev);
|
if (rc)
|
goto out;
|
|
rc = init_resources(adapter);
|
if (rc)
|
goto out;
|
|
ibmvnic_disable_irqs(adapter);
|
adapter->state = VNIC_CLOSED;
|
|
if (reset_state == VNIC_CLOSED)
|
goto out;
|
|
rc = __ibmvnic_open(netdev);
|
if (rc) {
|
rc = IBMVNIC_OPEN_FAILED;
|
goto out;
|
}
|
|
call_netdevice_notifiers(NETDEV_NOTIFY_PEERS, netdev);
|
call_netdevice_notifiers(NETDEV_RESEND_IGMP, netdev);
|
out:
|
/* restore adapter state if reset failed */
|
if (rc)
|
adapter->state = reset_state;
|
netdev_dbg(adapter->netdev, "[S:%d FOP:%d] Hard reset done, rc %d\n",
|
adapter->state, adapter->failover_pending, rc);
|
return rc;
|
}
|
|
static struct ibmvnic_rwi *get_next_rwi(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_rwi *rwi;
|
unsigned long flags;
|
|
spin_lock_irqsave(&adapter->rwi_lock, flags);
|
|
if (!list_empty(&adapter->rwi_list)) {
|
rwi = list_first_entry(&adapter->rwi_list, struct ibmvnic_rwi,
|
list);
|
list_del(&rwi->list);
|
} else {
|
rwi = NULL;
|
}
|
|
spin_unlock_irqrestore(&adapter->rwi_lock, flags);
|
return rwi;
|
}
|
|
static void __ibmvnic_reset(struct work_struct *work)
|
{
|
struct ibmvnic_rwi *rwi;
|
struct ibmvnic_adapter *adapter;
|
bool saved_state = false;
|
unsigned long flags;
|
u32 reset_state;
|
int rc = 0;
|
|
adapter = container_of(work, struct ibmvnic_adapter, ibmvnic_reset);
|
|
if (test_and_set_bit_lock(0, &adapter->resetting)) {
|
schedule_delayed_work(&adapter->ibmvnic_delayed_reset,
|
IBMVNIC_RESET_DELAY);
|
return;
|
}
|
|
rwi = get_next_rwi(adapter);
|
while (rwi) {
|
spin_lock_irqsave(&adapter->state_lock, flags);
|
|
if (adapter->state == VNIC_REMOVING ||
|
adapter->state == VNIC_REMOVED) {
|
spin_unlock_irqrestore(&adapter->state_lock, flags);
|
kfree(rwi);
|
rc = EBUSY;
|
break;
|
}
|
|
if (!saved_state) {
|
reset_state = adapter->state;
|
saved_state = true;
|
}
|
spin_unlock_irqrestore(&adapter->state_lock, flags);
|
|
if (rwi->reset_reason == VNIC_RESET_CHANGE_PARAM) {
|
/* CHANGE_PARAM requestor holds rtnl_lock */
|
rc = do_change_param_reset(adapter, rwi, reset_state);
|
} else if (adapter->force_reset_recovery) {
|
/*
|
* Since we are doing a hard reset now, clear the
|
* failover_pending flag so we don't ignore any
|
* future MOBILITY or other resets.
|
*/
|
adapter->failover_pending = false;
|
|
/* Transport event occurred during previous reset */
|
if (adapter->wait_for_reset) {
|
/* Previous was CHANGE_PARAM; caller locked */
|
adapter->force_reset_recovery = false;
|
rc = do_hard_reset(adapter, rwi, reset_state);
|
} else {
|
rtnl_lock();
|
adapter->force_reset_recovery = false;
|
rc = do_hard_reset(adapter, rwi, reset_state);
|
rtnl_unlock();
|
}
|
if (rc) {
|
/* give backing device time to settle down */
|
netdev_dbg(adapter->netdev,
|
"[S:%d] Hard reset failed, waiting 60 secs\n",
|
adapter->state);
|
set_current_state(TASK_UNINTERRUPTIBLE);
|
schedule_timeout(60 * HZ);
|
}
|
} else {
|
rc = do_reset(adapter, rwi, reset_state);
|
}
|
kfree(rwi);
|
adapter->last_reset_time = jiffies;
|
|
if (rc)
|
netdev_dbg(adapter->netdev, "Reset failed, rc=%d\n", rc);
|
|
rwi = get_next_rwi(adapter);
|
|
if (rwi && (rwi->reset_reason == VNIC_RESET_FAILOVER ||
|
rwi->reset_reason == VNIC_RESET_MOBILITY))
|
adapter->force_reset_recovery = true;
|
}
|
|
if (adapter->wait_for_reset) {
|
adapter->reset_done_rc = rc;
|
complete(&adapter->reset_done);
|
}
|
|
clear_bit_unlock(0, &adapter->resetting);
|
|
netdev_dbg(adapter->netdev,
|
"[S:%d FRR:%d WFR:%d] Done processing resets\n",
|
adapter->state, adapter->force_reset_recovery,
|
adapter->wait_for_reset);
|
}
|
|
static void __ibmvnic_delayed_reset(struct work_struct *work)
|
{
|
struct ibmvnic_adapter *adapter;
|
|
adapter = container_of(work, struct ibmvnic_adapter,
|
ibmvnic_delayed_reset.work);
|
__ibmvnic_reset(&adapter->ibmvnic_reset);
|
}
|
|
static int ibmvnic_reset(struct ibmvnic_adapter *adapter,
|
enum ibmvnic_reset_reason reason)
|
{
|
struct list_head *entry, *tmp_entry;
|
struct ibmvnic_rwi *rwi, *tmp;
|
struct net_device *netdev = adapter->netdev;
|
unsigned long flags;
|
int ret;
|
|
spin_lock_irqsave(&adapter->rwi_lock, flags);
|
|
/*
|
* If failover is pending don't schedule any other reset.
|
* Instead let the failover complete. If there is already a
|
* a failover reset scheduled, we will detect and drop the
|
* duplicate reset when walking the ->rwi_list below.
|
*/
|
if (adapter->state == VNIC_REMOVING ||
|
adapter->state == VNIC_REMOVED ||
|
(adapter->failover_pending && reason != VNIC_RESET_FAILOVER)) {
|
ret = EBUSY;
|
netdev_dbg(netdev, "Adapter removing or pending failover, skipping reset\n");
|
goto err;
|
}
|
|
if (adapter->state == VNIC_PROBING) {
|
netdev_warn(netdev, "Adapter reset during probe\n");
|
adapter->init_done_rc = EAGAIN;
|
ret = EAGAIN;
|
goto err;
|
}
|
|
list_for_each(entry, &adapter->rwi_list) {
|
tmp = list_entry(entry, struct ibmvnic_rwi, list);
|
if (tmp->reset_reason == reason) {
|
netdev_dbg(netdev, "Skipping matching reset, reason=%d\n",
|
reason);
|
ret = EBUSY;
|
goto err;
|
}
|
}
|
|
rwi = kzalloc(sizeof(*rwi), GFP_ATOMIC);
|
if (!rwi) {
|
ret = ENOMEM;
|
goto err;
|
}
|
/* if we just received a transport event,
|
* flush reset queue and process this reset
|
*/
|
if (adapter->force_reset_recovery && !list_empty(&adapter->rwi_list)) {
|
list_for_each_safe(entry, tmp_entry, &adapter->rwi_list) {
|
list_del(entry);
|
kfree(list_entry(entry, struct ibmvnic_rwi, list));
|
}
|
}
|
rwi->reset_reason = reason;
|
list_add_tail(&rwi->list, &adapter->rwi_list);
|
netdev_dbg(adapter->netdev, "Scheduling reset (reason %d)\n", reason);
|
schedule_work(&adapter->ibmvnic_reset);
|
|
ret = 0;
|
err:
|
/* ibmvnic_close() below can block, so drop the lock first */
|
spin_unlock_irqrestore(&adapter->rwi_lock, flags);
|
|
if (ret == ENOMEM)
|
ibmvnic_close(netdev);
|
|
return -ret;
|
}
|
|
static void ibmvnic_tx_timeout(struct net_device *dev, unsigned int txqueue)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(dev);
|
|
if (test_bit(0, &adapter->resetting)) {
|
netdev_err(adapter->netdev,
|
"Adapter is resetting, skip timeout reset\n");
|
return;
|
}
|
/* No queuing up reset until at least 5 seconds (default watchdog val)
|
* after last reset
|
*/
|
if (time_before(jiffies, (adapter->last_reset_time + dev->watchdog_timeo))) {
|
netdev_dbg(dev, "Not yet time to tx timeout.\n");
|
return;
|
}
|
ibmvnic_reset(adapter, VNIC_RESET_TIMEOUT);
|
}
|
|
static void remove_buff_from_pool(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_rx_buff *rx_buff)
|
{
|
struct ibmvnic_rx_pool *pool = &adapter->rx_pool[rx_buff->pool_index];
|
|
rx_buff->skb = NULL;
|
|
pool->free_map[pool->next_alloc] = (int)(rx_buff - pool->rx_buff);
|
pool->next_alloc = (pool->next_alloc + 1) % pool->size;
|
|
atomic_dec(&pool->available);
|
}
|
|
static int ibmvnic_poll(struct napi_struct *napi, int budget)
|
{
|
struct net_device *netdev = napi->dev;
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int scrq_num = (int)(napi - adapter->napi);
|
int frames_processed = 0;
|
|
restart_poll:
|
while (frames_processed < budget) {
|
struct sk_buff *skb;
|
struct ibmvnic_rx_buff *rx_buff;
|
union sub_crq *next;
|
u32 length;
|
u16 offset;
|
u8 flags = 0;
|
|
if (unlikely(test_bit(0, &adapter->resetting) &&
|
adapter->reset_reason != VNIC_RESET_NON_FATAL)) {
|
enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
|
napi_complete_done(napi, frames_processed);
|
return frames_processed;
|
}
|
|
if (!pending_scrq(adapter, adapter->rx_scrq[scrq_num]))
|
break;
|
/* The queue entry at the current index is peeked at above
|
* to determine that there is a valid descriptor awaiting
|
* processing. We want to be sure that the current slot
|
* holds a valid descriptor before reading its contents.
|
*/
|
dma_rmb();
|
next = ibmvnic_next_scrq(adapter, adapter->rx_scrq[scrq_num]);
|
rx_buff =
|
(struct ibmvnic_rx_buff *)be64_to_cpu(next->
|
rx_comp.correlator);
|
/* do error checking */
|
if (next->rx_comp.rc) {
|
netdev_dbg(netdev, "rx buffer returned with rc %x\n",
|
be16_to_cpu(next->rx_comp.rc));
|
/* free the entry */
|
next->rx_comp.first = 0;
|
dev_kfree_skb_any(rx_buff->skb);
|
remove_buff_from_pool(adapter, rx_buff);
|
continue;
|
} else if (!rx_buff->skb) {
|
/* free the entry */
|
next->rx_comp.first = 0;
|
remove_buff_from_pool(adapter, rx_buff);
|
continue;
|
}
|
|
length = be32_to_cpu(next->rx_comp.len);
|
offset = be16_to_cpu(next->rx_comp.off_frame_data);
|
flags = next->rx_comp.flags;
|
skb = rx_buff->skb;
|
/* load long_term_buff before copying to skb */
|
dma_rmb();
|
skb_copy_to_linear_data(skb, rx_buff->data + offset,
|
length);
|
|
/* VLAN Header has been stripped by the system firmware and
|
* needs to be inserted by the driver
|
*/
|
if (adapter->rx_vlan_header_insertion &&
|
(flags & IBMVNIC_VLAN_STRIPPED))
|
__vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q),
|
ntohs(next->rx_comp.vlan_tci));
|
|
/* free the entry */
|
next->rx_comp.first = 0;
|
remove_buff_from_pool(adapter, rx_buff);
|
|
skb_put(skb, length);
|
skb->protocol = eth_type_trans(skb, netdev);
|
skb_record_rx_queue(skb, scrq_num);
|
|
if (flags & IBMVNIC_IP_CHKSUM_GOOD &&
|
flags & IBMVNIC_TCP_UDP_CHKSUM_GOOD) {
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
}
|
|
length = skb->len;
|
napi_gro_receive(napi, skb); /* send it up */
|
netdev->stats.rx_packets++;
|
netdev->stats.rx_bytes += length;
|
adapter->rx_stats_buffers[scrq_num].packets++;
|
adapter->rx_stats_buffers[scrq_num].bytes += length;
|
frames_processed++;
|
}
|
|
if (adapter->state != VNIC_CLOSING)
|
replenish_rx_pool(adapter, &adapter->rx_pool[scrq_num]);
|
|
if (frames_processed < budget) {
|
enable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
|
napi_complete_done(napi, frames_processed);
|
if (pending_scrq(adapter, adapter->rx_scrq[scrq_num]) &&
|
napi_reschedule(napi)) {
|
disable_scrq_irq(adapter, adapter->rx_scrq[scrq_num]);
|
goto restart_poll;
|
}
|
}
|
return frames_processed;
|
}
|
|
static int wait_for_reset(struct ibmvnic_adapter *adapter)
|
{
|
int rc, ret;
|
|
adapter->fallback.mtu = adapter->req_mtu;
|
adapter->fallback.rx_queues = adapter->req_rx_queues;
|
adapter->fallback.tx_queues = adapter->req_tx_queues;
|
adapter->fallback.rx_entries = adapter->req_rx_add_entries_per_subcrq;
|
adapter->fallback.tx_entries = adapter->req_tx_entries_per_subcrq;
|
|
reinit_completion(&adapter->reset_done);
|
adapter->wait_for_reset = true;
|
rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
|
|
if (rc) {
|
ret = rc;
|
goto out;
|
}
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done, 60000);
|
if (rc) {
|
ret = -ENODEV;
|
goto out;
|
}
|
|
ret = 0;
|
if (adapter->reset_done_rc) {
|
ret = -EIO;
|
adapter->desired.mtu = adapter->fallback.mtu;
|
adapter->desired.rx_queues = adapter->fallback.rx_queues;
|
adapter->desired.tx_queues = adapter->fallback.tx_queues;
|
adapter->desired.rx_entries = adapter->fallback.rx_entries;
|
adapter->desired.tx_entries = adapter->fallback.tx_entries;
|
|
reinit_completion(&adapter->reset_done);
|
adapter->wait_for_reset = true;
|
rc = ibmvnic_reset(adapter, VNIC_RESET_CHANGE_PARAM);
|
if (rc) {
|
ret = rc;
|
goto out;
|
}
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->reset_done,
|
60000);
|
if (rc) {
|
ret = -ENODEV;
|
goto out;
|
}
|
}
|
out:
|
adapter->wait_for_reset = false;
|
|
return ret;
|
}
|
|
static int ibmvnic_change_mtu(struct net_device *netdev, int new_mtu)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
adapter->desired.mtu = new_mtu + ETH_HLEN;
|
|
return wait_for_reset(adapter);
|
}
|
|
static netdev_features_t ibmvnic_features_check(struct sk_buff *skb,
|
struct net_device *dev,
|
netdev_features_t features)
|
{
|
/* Some backing hardware adapters can not
|
* handle packets with a MSS less than 224
|
* or with only one segment.
|
*/
|
if (skb_is_gso(skb)) {
|
if (skb_shinfo(skb)->gso_size < 224 ||
|
skb_shinfo(skb)->gso_segs == 1)
|
features &= ~NETIF_F_GSO_MASK;
|
}
|
|
return features;
|
}
|
|
static const struct net_device_ops ibmvnic_netdev_ops = {
|
.ndo_open = ibmvnic_open,
|
.ndo_stop = ibmvnic_close,
|
.ndo_start_xmit = ibmvnic_xmit,
|
.ndo_set_rx_mode = ibmvnic_set_multi,
|
.ndo_set_mac_address = ibmvnic_set_mac,
|
.ndo_validate_addr = eth_validate_addr,
|
.ndo_tx_timeout = ibmvnic_tx_timeout,
|
.ndo_change_mtu = ibmvnic_change_mtu,
|
.ndo_features_check = ibmvnic_features_check,
|
};
|
|
/* ethtool functions */
|
|
static int ibmvnic_get_link_ksettings(struct net_device *netdev,
|
struct ethtool_link_ksettings *cmd)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
int rc;
|
|
rc = send_query_phys_parms(adapter);
|
if (rc) {
|
adapter->speed = SPEED_UNKNOWN;
|
adapter->duplex = DUPLEX_UNKNOWN;
|
}
|
cmd->base.speed = adapter->speed;
|
cmd->base.duplex = adapter->duplex;
|
cmd->base.port = PORT_FIBRE;
|
cmd->base.phy_address = 0;
|
cmd->base.autoneg = AUTONEG_ENABLE;
|
|
return 0;
|
}
|
|
static void ibmvnic_get_drvinfo(struct net_device *netdev,
|
struct ethtool_drvinfo *info)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
strlcpy(info->driver, ibmvnic_driver_name, sizeof(info->driver));
|
strlcpy(info->version, IBMVNIC_DRIVER_VERSION, sizeof(info->version));
|
strlcpy(info->fw_version, adapter->fw_version,
|
sizeof(info->fw_version));
|
}
|
|
static u32 ibmvnic_get_msglevel(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
return adapter->msg_enable;
|
}
|
|
static void ibmvnic_set_msglevel(struct net_device *netdev, u32 data)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
adapter->msg_enable = data;
|
}
|
|
static u32 ibmvnic_get_link(struct net_device *netdev)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
/* Don't need to send a query because we request a logical link up at
|
* init and then we wait for link state indications
|
*/
|
return adapter->logical_link_state;
|
}
|
|
static void ibmvnic_get_ringparam(struct net_device *netdev,
|
struct ethtool_ringparam *ring)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
ring->rx_max_pending = adapter->max_rx_add_entries_per_subcrq;
|
ring->tx_max_pending = adapter->max_tx_entries_per_subcrq;
|
ring->rx_mini_max_pending = 0;
|
ring->rx_jumbo_max_pending = 0;
|
ring->rx_pending = adapter->req_rx_add_entries_per_subcrq;
|
ring->tx_pending = adapter->req_tx_entries_per_subcrq;
|
ring->rx_mini_pending = 0;
|
ring->rx_jumbo_pending = 0;
|
}
|
|
static int ibmvnic_set_ringparam(struct net_device *netdev,
|
struct ethtool_ringparam *ring)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
if (ring->rx_pending > adapter->max_rx_add_entries_per_subcrq ||
|
ring->tx_pending > adapter->max_tx_entries_per_subcrq) {
|
netdev_err(netdev, "Invalid request.\n");
|
netdev_err(netdev, "Max tx buffers = %llu\n",
|
adapter->max_rx_add_entries_per_subcrq);
|
netdev_err(netdev, "Max rx buffers = %llu\n",
|
adapter->max_tx_entries_per_subcrq);
|
return -EINVAL;
|
}
|
|
adapter->desired.rx_entries = ring->rx_pending;
|
adapter->desired.tx_entries = ring->tx_pending;
|
|
return wait_for_reset(adapter);
|
}
|
|
static void ibmvnic_get_channels(struct net_device *netdev,
|
struct ethtool_channels *channels)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
channels->max_rx = adapter->max_rx_queues;
|
channels->max_tx = adapter->max_tx_queues;
|
channels->max_other = 0;
|
channels->max_combined = 0;
|
channels->rx_count = adapter->req_rx_queues;
|
channels->tx_count = adapter->req_tx_queues;
|
channels->other_count = 0;
|
channels->combined_count = 0;
|
}
|
|
static int ibmvnic_set_channels(struct net_device *netdev,
|
struct ethtool_channels *channels)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
adapter->desired.rx_queues = channels->rx_count;
|
adapter->desired.tx_queues = channels->tx_count;
|
|
return wait_for_reset(adapter);
|
}
|
|
static void ibmvnic_get_strings(struct net_device *dev, u32 stringset, u8 *data)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(dev);
|
int i;
|
|
if (stringset != ETH_SS_STATS)
|
return;
|
|
for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++, data += ETH_GSTRING_LEN)
|
memcpy(data, ibmvnic_stats[i].name, ETH_GSTRING_LEN);
|
|
for (i = 0; i < adapter->req_tx_queues; i++) {
|
snprintf(data, ETH_GSTRING_LEN, "tx%d_packets", i);
|
data += ETH_GSTRING_LEN;
|
|
snprintf(data, ETH_GSTRING_LEN, "tx%d_bytes", i);
|
data += ETH_GSTRING_LEN;
|
|
snprintf(data, ETH_GSTRING_LEN, "tx%d_dropped_packets", i);
|
data += ETH_GSTRING_LEN;
|
}
|
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
snprintf(data, ETH_GSTRING_LEN, "rx%d_packets", i);
|
data += ETH_GSTRING_LEN;
|
|
snprintf(data, ETH_GSTRING_LEN, "rx%d_bytes", i);
|
data += ETH_GSTRING_LEN;
|
|
snprintf(data, ETH_GSTRING_LEN, "rx%d_interrupts", i);
|
data += ETH_GSTRING_LEN;
|
}
|
}
|
|
static int ibmvnic_get_sset_count(struct net_device *dev, int sset)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(dev);
|
|
switch (sset) {
|
case ETH_SS_STATS:
|
return ARRAY_SIZE(ibmvnic_stats) +
|
adapter->req_tx_queues * NUM_TX_STATS +
|
adapter->req_rx_queues * NUM_RX_STATS;
|
default:
|
return -EOPNOTSUPP;
|
}
|
}
|
|
static void ibmvnic_get_ethtool_stats(struct net_device *dev,
|
struct ethtool_stats *stats, u64 *data)
|
{
|
struct ibmvnic_adapter *adapter = netdev_priv(dev);
|
union ibmvnic_crq crq;
|
int i, j;
|
int rc;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.request_statistics.first = IBMVNIC_CRQ_CMD;
|
crq.request_statistics.cmd = REQUEST_STATISTICS;
|
crq.request_statistics.ioba = cpu_to_be32(adapter->stats_token);
|
crq.request_statistics.len =
|
cpu_to_be32(sizeof(struct ibmvnic_statistics));
|
|
/* Wait for data to be written */
|
reinit_completion(&adapter->stats_done);
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc)
|
return;
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->stats_done, 10000);
|
if (rc)
|
return;
|
|
for (i = 0; i < ARRAY_SIZE(ibmvnic_stats); i++)
|
data[i] = be64_to_cpu(IBMVNIC_GET_STAT
|
(adapter, ibmvnic_stats[i].offset));
|
|
for (j = 0; j < adapter->req_tx_queues; j++) {
|
data[i] = adapter->tx_stats_buffers[j].packets;
|
i++;
|
data[i] = adapter->tx_stats_buffers[j].bytes;
|
i++;
|
data[i] = adapter->tx_stats_buffers[j].dropped_packets;
|
i++;
|
}
|
|
for (j = 0; j < adapter->req_rx_queues; j++) {
|
data[i] = adapter->rx_stats_buffers[j].packets;
|
i++;
|
data[i] = adapter->rx_stats_buffers[j].bytes;
|
i++;
|
data[i] = adapter->rx_stats_buffers[j].interrupts;
|
i++;
|
}
|
}
|
|
static const struct ethtool_ops ibmvnic_ethtool_ops = {
|
.get_drvinfo = ibmvnic_get_drvinfo,
|
.get_msglevel = ibmvnic_get_msglevel,
|
.set_msglevel = ibmvnic_set_msglevel,
|
.get_link = ibmvnic_get_link,
|
.get_ringparam = ibmvnic_get_ringparam,
|
.set_ringparam = ibmvnic_set_ringparam,
|
.get_channels = ibmvnic_get_channels,
|
.set_channels = ibmvnic_set_channels,
|
.get_strings = ibmvnic_get_strings,
|
.get_sset_count = ibmvnic_get_sset_count,
|
.get_ethtool_stats = ibmvnic_get_ethtool_stats,
|
.get_link_ksettings = ibmvnic_get_link_ksettings,
|
};
|
|
/* Routines for managing CRQs/sCRQs */
|
|
static int reset_one_sub_crq_queue(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_sub_crq_queue *scrq)
|
{
|
int rc;
|
|
if (!scrq) {
|
netdev_dbg(adapter->netdev, "Invalid scrq reset.\n");
|
return -EINVAL;
|
}
|
|
if (scrq->irq) {
|
free_irq(scrq->irq, scrq);
|
irq_dispose_mapping(scrq->irq);
|
scrq->irq = 0;
|
}
|
if (scrq->msgs) {
|
memset(scrq->msgs, 0, 4 * PAGE_SIZE);
|
atomic_set(&scrq->used, 0);
|
scrq->cur = 0;
|
} else {
|
netdev_dbg(adapter->netdev, "Invalid scrq reset\n");
|
return -EINVAL;
|
}
|
|
rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
|
4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
|
return rc;
|
}
|
|
static int reset_sub_crq_queues(struct ibmvnic_adapter *adapter)
|
{
|
int i, rc;
|
|
if (!adapter->tx_scrq || !adapter->rx_scrq)
|
return -EINVAL;
|
|
for (i = 0; i < adapter->req_tx_queues; i++) {
|
netdev_dbg(adapter->netdev, "Re-setting tx_scrq[%d]\n", i);
|
rc = reset_one_sub_crq_queue(adapter, adapter->tx_scrq[i]);
|
if (rc)
|
return rc;
|
}
|
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
netdev_dbg(adapter->netdev, "Re-setting rx_scrq[%d]\n", i);
|
rc = reset_one_sub_crq_queue(adapter, adapter->rx_scrq[i]);
|
if (rc)
|
return rc;
|
}
|
|
return rc;
|
}
|
|
static void release_sub_crq_queue(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_sub_crq_queue *scrq,
|
bool do_h_free)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
long rc;
|
|
netdev_dbg(adapter->netdev, "Releasing sub-CRQ\n");
|
|
if (do_h_free) {
|
/* Close the sub-crqs */
|
do {
|
rc = plpar_hcall_norets(H_FREE_SUB_CRQ,
|
adapter->vdev->unit_address,
|
scrq->crq_num);
|
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
|
|
if (rc) {
|
netdev_err(adapter->netdev,
|
"Failed to release sub-CRQ %16lx, rc = %ld\n",
|
scrq->crq_num, rc);
|
}
|
}
|
|
dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
|
DMA_BIDIRECTIONAL);
|
free_pages((unsigned long)scrq->msgs, 2);
|
kfree(scrq);
|
}
|
|
static struct ibmvnic_sub_crq_queue *init_sub_crq_queue(struct ibmvnic_adapter
|
*adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
struct ibmvnic_sub_crq_queue *scrq;
|
int rc;
|
|
scrq = kzalloc(sizeof(*scrq), GFP_KERNEL);
|
if (!scrq)
|
return NULL;
|
|
scrq->msgs =
|
(union sub_crq *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 2);
|
if (!scrq->msgs) {
|
dev_warn(dev, "Couldn't allocate crq queue messages page\n");
|
goto zero_page_failed;
|
}
|
|
scrq->msg_token = dma_map_single(dev, scrq->msgs, 4 * PAGE_SIZE,
|
DMA_BIDIRECTIONAL);
|
if (dma_mapping_error(dev, scrq->msg_token)) {
|
dev_warn(dev, "Couldn't map crq queue messages page\n");
|
goto map_failed;
|
}
|
|
rc = h_reg_sub_crq(adapter->vdev->unit_address, scrq->msg_token,
|
4 * PAGE_SIZE, &scrq->crq_num, &scrq->hw_irq);
|
|
if (rc == H_RESOURCE)
|
rc = ibmvnic_reset_crq(adapter);
|
|
if (rc == H_CLOSED) {
|
dev_warn(dev, "Partner adapter not ready, waiting.\n");
|
} else if (rc) {
|
dev_warn(dev, "Error %d registering sub-crq\n", rc);
|
goto reg_failed;
|
}
|
|
scrq->adapter = adapter;
|
scrq->size = 4 * PAGE_SIZE / sizeof(*scrq->msgs);
|
spin_lock_init(&scrq->lock);
|
|
netdev_dbg(adapter->netdev,
|
"sub-crq initialized, num %lx, hw_irq=%lx, irq=%x\n",
|
scrq->crq_num, scrq->hw_irq, scrq->irq);
|
|
return scrq;
|
|
reg_failed:
|
dma_unmap_single(dev, scrq->msg_token, 4 * PAGE_SIZE,
|
DMA_BIDIRECTIONAL);
|
map_failed:
|
free_pages((unsigned long)scrq->msgs, 2);
|
zero_page_failed:
|
kfree(scrq);
|
|
return NULL;
|
}
|
|
static void release_sub_crqs(struct ibmvnic_adapter *adapter, bool do_h_free)
|
{
|
int i;
|
|
if (adapter->tx_scrq) {
|
for (i = 0; i < adapter->num_active_tx_scrqs; i++) {
|
if (!adapter->tx_scrq[i])
|
continue;
|
|
netdev_dbg(adapter->netdev, "Releasing tx_scrq[%d]\n",
|
i);
|
if (adapter->tx_scrq[i]->irq) {
|
free_irq(adapter->tx_scrq[i]->irq,
|
adapter->tx_scrq[i]);
|
irq_dispose_mapping(adapter->tx_scrq[i]->irq);
|
adapter->tx_scrq[i]->irq = 0;
|
}
|
|
release_sub_crq_queue(adapter, adapter->tx_scrq[i],
|
do_h_free);
|
}
|
|
kfree(adapter->tx_scrq);
|
adapter->tx_scrq = NULL;
|
adapter->num_active_tx_scrqs = 0;
|
}
|
|
if (adapter->rx_scrq) {
|
for (i = 0; i < adapter->num_active_rx_scrqs; i++) {
|
if (!adapter->rx_scrq[i])
|
continue;
|
|
netdev_dbg(adapter->netdev, "Releasing rx_scrq[%d]\n",
|
i);
|
if (adapter->rx_scrq[i]->irq) {
|
free_irq(adapter->rx_scrq[i]->irq,
|
adapter->rx_scrq[i]);
|
irq_dispose_mapping(adapter->rx_scrq[i]->irq);
|
adapter->rx_scrq[i]->irq = 0;
|
}
|
|
release_sub_crq_queue(adapter, adapter->rx_scrq[i],
|
do_h_free);
|
}
|
|
kfree(adapter->rx_scrq);
|
adapter->rx_scrq = NULL;
|
adapter->num_active_rx_scrqs = 0;
|
}
|
}
|
|
static int disable_scrq_irq(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_sub_crq_queue *scrq)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
unsigned long rc;
|
|
rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
|
H_DISABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
|
if (rc)
|
dev_err(dev, "Couldn't disable scrq irq 0x%lx. rc=%ld\n",
|
scrq->hw_irq, rc);
|
return rc;
|
}
|
|
static int enable_scrq_irq(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_sub_crq_queue *scrq)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
unsigned long rc;
|
|
if (scrq->hw_irq > 0x100000000ULL) {
|
dev_err(dev, "bad hw_irq = %lx\n", scrq->hw_irq);
|
return 1;
|
}
|
|
if (test_bit(0, &adapter->resetting) &&
|
adapter->reset_reason == VNIC_RESET_MOBILITY) {
|
u64 val = (0xff000000) | scrq->hw_irq;
|
|
rc = plpar_hcall_norets(H_EOI, val);
|
/* H_EOI would fail with rc = H_FUNCTION when running
|
* in XIVE mode which is expected, but not an error.
|
*/
|
if (rc && rc != H_FUNCTION)
|
dev_err(dev, "H_EOI FAILED irq 0x%llx. rc=%ld\n",
|
val, rc);
|
}
|
|
rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
|
H_ENABLE_VIO_INTERRUPT, scrq->hw_irq, 0, 0);
|
if (rc)
|
dev_err(dev, "Couldn't enable scrq irq 0x%lx. rc=%ld\n",
|
scrq->hw_irq, rc);
|
return rc;
|
}
|
|
static int ibmvnic_complete_tx(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_sub_crq_queue *scrq)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
struct ibmvnic_tx_pool *tx_pool;
|
struct ibmvnic_tx_buff *txbuff;
|
union sub_crq *next;
|
int index;
|
int i, j;
|
|
restart_loop:
|
while (pending_scrq(adapter, scrq)) {
|
unsigned int pool = scrq->pool_index;
|
int num_entries = 0;
|
|
/* The queue entry at the current index is peeked at above
|
* to determine that there is a valid descriptor awaiting
|
* processing. We want to be sure that the current slot
|
* holds a valid descriptor before reading its contents.
|
*/
|
dma_rmb();
|
|
next = ibmvnic_next_scrq(adapter, scrq);
|
for (i = 0; i < next->tx_comp.num_comps; i++) {
|
if (next->tx_comp.rcs[i])
|
dev_err(dev, "tx error %x\n",
|
next->tx_comp.rcs[i]);
|
index = be32_to_cpu(next->tx_comp.correlators[i]);
|
if (index & IBMVNIC_TSO_POOL_MASK) {
|
tx_pool = &adapter->tso_pool[pool];
|
index &= ~IBMVNIC_TSO_POOL_MASK;
|
} else {
|
tx_pool = &adapter->tx_pool[pool];
|
}
|
|
txbuff = &tx_pool->tx_buff[index];
|
|
for (j = 0; j < IBMVNIC_MAX_FRAGS_PER_CRQ; j++) {
|
if (!txbuff->data_dma[j])
|
continue;
|
|
txbuff->data_dma[j] = 0;
|
}
|
|
if (txbuff->last_frag) {
|
dev_kfree_skb_any(txbuff->skb);
|
txbuff->skb = NULL;
|
}
|
|
num_entries += txbuff->num_entries;
|
|
tx_pool->free_map[tx_pool->producer_index] = index;
|
tx_pool->producer_index =
|
(tx_pool->producer_index + 1) %
|
tx_pool->num_buffers;
|
}
|
/* remove tx_comp scrq*/
|
next->tx_comp.first = 0;
|
|
if (atomic_sub_return(num_entries, &scrq->used) <=
|
(adapter->req_tx_entries_per_subcrq / 2) &&
|
__netif_subqueue_stopped(adapter->netdev,
|
scrq->pool_index)) {
|
netif_wake_subqueue(adapter->netdev, scrq->pool_index);
|
netdev_dbg(adapter->netdev, "Started queue %d\n",
|
scrq->pool_index);
|
}
|
}
|
|
enable_scrq_irq(adapter, scrq);
|
|
if (pending_scrq(adapter, scrq)) {
|
disable_scrq_irq(adapter, scrq);
|
goto restart_loop;
|
}
|
|
return 0;
|
}
|
|
static irqreturn_t ibmvnic_interrupt_tx(int irq, void *instance)
|
{
|
struct ibmvnic_sub_crq_queue *scrq = instance;
|
struct ibmvnic_adapter *adapter = scrq->adapter;
|
|
disable_scrq_irq(adapter, scrq);
|
ibmvnic_complete_tx(adapter, scrq);
|
|
return IRQ_HANDLED;
|
}
|
|
static irqreturn_t ibmvnic_interrupt_rx(int irq, void *instance)
|
{
|
struct ibmvnic_sub_crq_queue *scrq = instance;
|
struct ibmvnic_adapter *adapter = scrq->adapter;
|
|
/* When booting a kdump kernel we can hit pending interrupts
|
* prior to completing driver initialization.
|
*/
|
if (unlikely(adapter->state != VNIC_OPEN))
|
return IRQ_NONE;
|
|
adapter->rx_stats_buffers[scrq->scrq_num].interrupts++;
|
|
if (napi_schedule_prep(&adapter->napi[scrq->scrq_num])) {
|
disable_scrq_irq(adapter, scrq);
|
__napi_schedule(&adapter->napi[scrq->scrq_num]);
|
}
|
|
return IRQ_HANDLED;
|
}
|
|
static int init_sub_crq_irqs(struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
struct ibmvnic_sub_crq_queue *scrq;
|
int i = 0, j = 0;
|
int rc = 0;
|
|
for (i = 0; i < adapter->req_tx_queues; i++) {
|
netdev_dbg(adapter->netdev, "Initializing tx_scrq[%d] irq\n",
|
i);
|
scrq = adapter->tx_scrq[i];
|
scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
|
|
if (!scrq->irq) {
|
rc = -EINVAL;
|
dev_err(dev, "Error mapping irq\n");
|
goto req_tx_irq_failed;
|
}
|
|
snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-tx%d",
|
adapter->vdev->unit_address, i);
|
rc = request_irq(scrq->irq, ibmvnic_interrupt_tx,
|
0, scrq->name, scrq);
|
|
if (rc) {
|
dev_err(dev, "Couldn't register tx irq 0x%x. rc=%d\n",
|
scrq->irq, rc);
|
irq_dispose_mapping(scrq->irq);
|
goto req_tx_irq_failed;
|
}
|
}
|
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
netdev_dbg(adapter->netdev, "Initializing rx_scrq[%d] irq\n",
|
i);
|
scrq = adapter->rx_scrq[i];
|
scrq->irq = irq_create_mapping(NULL, scrq->hw_irq);
|
if (!scrq->irq) {
|
rc = -EINVAL;
|
dev_err(dev, "Error mapping irq\n");
|
goto req_rx_irq_failed;
|
}
|
snprintf(scrq->name, sizeof(scrq->name), "ibmvnic-%x-rx%d",
|
adapter->vdev->unit_address, i);
|
rc = request_irq(scrq->irq, ibmvnic_interrupt_rx,
|
0, scrq->name, scrq);
|
if (rc) {
|
dev_err(dev, "Couldn't register rx irq 0x%x. rc=%d\n",
|
scrq->irq, rc);
|
irq_dispose_mapping(scrq->irq);
|
goto req_rx_irq_failed;
|
}
|
}
|
return rc;
|
|
req_rx_irq_failed:
|
for (j = 0; j < i; j++) {
|
free_irq(adapter->rx_scrq[j]->irq, adapter->rx_scrq[j]);
|
irq_dispose_mapping(adapter->rx_scrq[j]->irq);
|
}
|
i = adapter->req_tx_queues;
|
req_tx_irq_failed:
|
for (j = 0; j < i; j++) {
|
free_irq(adapter->tx_scrq[j]->irq, adapter->tx_scrq[j]);
|
irq_dispose_mapping(adapter->tx_scrq[j]->irq);
|
}
|
release_sub_crqs(adapter, 1);
|
return rc;
|
}
|
|
static int init_sub_crqs(struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
struct ibmvnic_sub_crq_queue **allqueues;
|
int registered_queues = 0;
|
int total_queues;
|
int more = 0;
|
int i;
|
|
total_queues = adapter->req_tx_queues + adapter->req_rx_queues;
|
|
allqueues = kcalloc(total_queues, sizeof(*allqueues), GFP_KERNEL);
|
if (!allqueues)
|
return -1;
|
|
for (i = 0; i < total_queues; i++) {
|
allqueues[i] = init_sub_crq_queue(adapter);
|
if (!allqueues[i]) {
|
dev_warn(dev, "Couldn't allocate all sub-crqs\n");
|
break;
|
}
|
registered_queues++;
|
}
|
|
/* Make sure we were able to register the minimum number of queues */
|
if (registered_queues <
|
adapter->min_tx_queues + adapter->min_rx_queues) {
|
dev_err(dev, "Fatal: Couldn't init min number of sub-crqs\n");
|
goto tx_failed;
|
}
|
|
/* Distribute the failed allocated queues*/
|
for (i = 0; i < total_queues - registered_queues + more ; i++) {
|
netdev_dbg(adapter->netdev, "Reducing number of queues\n");
|
switch (i % 3) {
|
case 0:
|
if (adapter->req_rx_queues > adapter->min_rx_queues)
|
adapter->req_rx_queues--;
|
else
|
more++;
|
break;
|
case 1:
|
if (adapter->req_tx_queues > adapter->min_tx_queues)
|
adapter->req_tx_queues--;
|
else
|
more++;
|
break;
|
}
|
}
|
|
adapter->tx_scrq = kcalloc(adapter->req_tx_queues,
|
sizeof(*adapter->tx_scrq), GFP_KERNEL);
|
if (!adapter->tx_scrq)
|
goto tx_failed;
|
|
for (i = 0; i < adapter->req_tx_queues; i++) {
|
adapter->tx_scrq[i] = allqueues[i];
|
adapter->tx_scrq[i]->pool_index = i;
|
adapter->num_active_tx_scrqs++;
|
}
|
|
adapter->rx_scrq = kcalloc(adapter->req_rx_queues,
|
sizeof(*adapter->rx_scrq), GFP_KERNEL);
|
if (!adapter->rx_scrq)
|
goto rx_failed;
|
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
adapter->rx_scrq[i] = allqueues[i + adapter->req_tx_queues];
|
adapter->rx_scrq[i]->scrq_num = i;
|
adapter->num_active_rx_scrqs++;
|
}
|
|
kfree(allqueues);
|
return 0;
|
|
rx_failed:
|
kfree(adapter->tx_scrq);
|
adapter->tx_scrq = NULL;
|
tx_failed:
|
for (i = 0; i < registered_queues; i++)
|
release_sub_crq_queue(adapter, allqueues[i], 1);
|
kfree(allqueues);
|
return -1;
|
}
|
|
static void send_request_cap(struct ibmvnic_adapter *adapter, int retry)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
union ibmvnic_crq crq;
|
int max_entries;
|
int cap_reqs;
|
|
/* We send out 6 or 7 REQUEST_CAPABILITY CRQs below (depending on
|
* the PROMISC flag). Initialize this count upfront. When the tasklet
|
* receives a response to all of these, it will send the next protocol
|
* message (QUERY_IP_OFFLOAD).
|
*/
|
if (!(adapter->netdev->flags & IFF_PROMISC) ||
|
adapter->promisc_supported)
|
cap_reqs = 7;
|
else
|
cap_reqs = 6;
|
|
if (!retry) {
|
/* Sub-CRQ entries are 32 byte long */
|
int entries_page = 4 * PAGE_SIZE / (sizeof(u64) * 4);
|
|
atomic_set(&adapter->running_cap_crqs, cap_reqs);
|
|
if (adapter->min_tx_entries_per_subcrq > entries_page ||
|
adapter->min_rx_add_entries_per_subcrq > entries_page) {
|
dev_err(dev, "Fatal, invalid entries per sub-crq\n");
|
return;
|
}
|
|
if (adapter->desired.mtu)
|
adapter->req_mtu = adapter->desired.mtu;
|
else
|
adapter->req_mtu = adapter->netdev->mtu + ETH_HLEN;
|
|
if (!adapter->desired.tx_entries)
|
adapter->desired.tx_entries =
|
adapter->max_tx_entries_per_subcrq;
|
if (!adapter->desired.rx_entries)
|
adapter->desired.rx_entries =
|
adapter->max_rx_add_entries_per_subcrq;
|
|
max_entries = IBMVNIC_MAX_LTB_SIZE /
|
(adapter->req_mtu + IBMVNIC_BUFFER_HLEN);
|
|
if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
|
adapter->desired.tx_entries > IBMVNIC_MAX_LTB_SIZE) {
|
adapter->desired.tx_entries = max_entries;
|
}
|
|
if ((adapter->req_mtu + IBMVNIC_BUFFER_HLEN) *
|
adapter->desired.rx_entries > IBMVNIC_MAX_LTB_SIZE) {
|
adapter->desired.rx_entries = max_entries;
|
}
|
|
if (adapter->desired.tx_entries)
|
adapter->req_tx_entries_per_subcrq =
|
adapter->desired.tx_entries;
|
else
|
adapter->req_tx_entries_per_subcrq =
|
adapter->max_tx_entries_per_subcrq;
|
|
if (adapter->desired.rx_entries)
|
adapter->req_rx_add_entries_per_subcrq =
|
adapter->desired.rx_entries;
|
else
|
adapter->req_rx_add_entries_per_subcrq =
|
adapter->max_rx_add_entries_per_subcrq;
|
|
if (adapter->desired.tx_queues)
|
adapter->req_tx_queues =
|
adapter->desired.tx_queues;
|
else
|
adapter->req_tx_queues =
|
adapter->opt_tx_comp_sub_queues;
|
|
if (adapter->desired.rx_queues)
|
adapter->req_rx_queues =
|
adapter->desired.rx_queues;
|
else
|
adapter->req_rx_queues =
|
adapter->opt_rx_comp_queues;
|
|
adapter->req_rx_add_queues = adapter->max_rx_add_queues;
|
} else {
|
atomic_add(cap_reqs, &adapter->running_cap_crqs);
|
}
|
memset(&crq, 0, sizeof(crq));
|
crq.request_capability.first = IBMVNIC_CRQ_CMD;
|
crq.request_capability.cmd = REQUEST_CAPABILITY;
|
|
crq.request_capability.capability = cpu_to_be16(REQ_TX_QUEUES);
|
crq.request_capability.number = cpu_to_be64(adapter->req_tx_queues);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
|
crq.request_capability.capability = cpu_to_be16(REQ_RX_QUEUES);
|
crq.request_capability.number = cpu_to_be64(adapter->req_rx_queues);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
|
crq.request_capability.capability = cpu_to_be16(REQ_RX_ADD_QUEUES);
|
crq.request_capability.number = cpu_to_be64(adapter->req_rx_add_queues);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
|
crq.request_capability.capability =
|
cpu_to_be16(REQ_TX_ENTRIES_PER_SUBCRQ);
|
crq.request_capability.number =
|
cpu_to_be64(adapter->req_tx_entries_per_subcrq);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
|
crq.request_capability.capability =
|
cpu_to_be16(REQ_RX_ADD_ENTRIES_PER_SUBCRQ);
|
crq.request_capability.number =
|
cpu_to_be64(adapter->req_rx_add_entries_per_subcrq);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
|
crq.request_capability.capability = cpu_to_be16(REQ_MTU);
|
crq.request_capability.number = cpu_to_be64(adapter->req_mtu);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
|
if (adapter->netdev->flags & IFF_PROMISC) {
|
if (adapter->promisc_supported) {
|
crq.request_capability.capability =
|
cpu_to_be16(PROMISC_REQUESTED);
|
crq.request_capability.number = cpu_to_be64(1);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
}
|
} else {
|
crq.request_capability.capability =
|
cpu_to_be16(PROMISC_REQUESTED);
|
crq.request_capability.number = cpu_to_be64(0);
|
cap_reqs--;
|
ibmvnic_send_crq(adapter, &crq);
|
}
|
|
/* Keep at end to catch any discrepancy between expected and actual
|
* CRQs sent.
|
*/
|
WARN_ON(cap_reqs != 0);
|
}
|
|
static int pending_scrq(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_sub_crq_queue *scrq)
|
{
|
union sub_crq *entry = &scrq->msgs[scrq->cur];
|
|
if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP)
|
return 1;
|
else
|
return 0;
|
}
|
|
static union sub_crq *ibmvnic_next_scrq(struct ibmvnic_adapter *adapter,
|
struct ibmvnic_sub_crq_queue *scrq)
|
{
|
union sub_crq *entry;
|
unsigned long flags;
|
|
spin_lock_irqsave(&scrq->lock, flags);
|
entry = &scrq->msgs[scrq->cur];
|
if (entry->generic.first & IBMVNIC_CRQ_CMD_RSP) {
|
if (++scrq->cur == scrq->size)
|
scrq->cur = 0;
|
} else {
|
entry = NULL;
|
}
|
spin_unlock_irqrestore(&scrq->lock, flags);
|
|
/* Ensure that the entire buffer descriptor has been
|
* loaded before reading its contents
|
*/
|
dma_rmb();
|
|
return entry;
|
}
|
|
static union ibmvnic_crq *ibmvnic_next_crq(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_crq_queue *queue = &adapter->crq;
|
union ibmvnic_crq *crq;
|
|
crq = &queue->msgs[queue->cur];
|
if (crq->generic.first & IBMVNIC_CRQ_CMD_RSP) {
|
if (++queue->cur == queue->size)
|
queue->cur = 0;
|
} else {
|
crq = NULL;
|
}
|
|
return crq;
|
}
|
|
static void print_subcrq_error(struct device *dev, int rc, const char *func)
|
{
|
switch (rc) {
|
case H_PARAMETER:
|
dev_warn_ratelimited(dev,
|
"%s failed: Send request is malformed or adapter failover pending. (rc=%d)\n",
|
func, rc);
|
break;
|
case H_CLOSED:
|
dev_warn_ratelimited(dev,
|
"%s failed: Backing queue closed. Adapter is down or failover pending. (rc=%d)\n",
|
func, rc);
|
break;
|
default:
|
dev_err_ratelimited(dev, "%s failed: (rc=%d)\n", func, rc);
|
break;
|
}
|
}
|
|
static int send_subcrq(struct ibmvnic_adapter *adapter, u64 remote_handle,
|
union sub_crq *sub_crq)
|
{
|
unsigned int ua = adapter->vdev->unit_address;
|
struct device *dev = &adapter->vdev->dev;
|
u64 *u64_crq = (u64 *)sub_crq;
|
int rc;
|
|
netdev_dbg(adapter->netdev,
|
"Sending sCRQ %016lx: %016lx %016lx %016lx %016lx\n",
|
(unsigned long int)cpu_to_be64(remote_handle),
|
(unsigned long int)cpu_to_be64(u64_crq[0]),
|
(unsigned long int)cpu_to_be64(u64_crq[1]),
|
(unsigned long int)cpu_to_be64(u64_crq[2]),
|
(unsigned long int)cpu_to_be64(u64_crq[3]));
|
|
/* Make sure the hypervisor sees the complete request */
|
mb();
|
|
rc = plpar_hcall_norets(H_SEND_SUB_CRQ, ua,
|
cpu_to_be64(remote_handle),
|
cpu_to_be64(u64_crq[0]),
|
cpu_to_be64(u64_crq[1]),
|
cpu_to_be64(u64_crq[2]),
|
cpu_to_be64(u64_crq[3]));
|
|
if (rc)
|
print_subcrq_error(dev, rc, __func__);
|
|
return rc;
|
}
|
|
static int send_subcrq_indirect(struct ibmvnic_adapter *adapter,
|
u64 remote_handle, u64 ioba, u64 num_entries)
|
{
|
unsigned int ua = adapter->vdev->unit_address;
|
struct device *dev = &adapter->vdev->dev;
|
int rc;
|
|
/* Make sure the hypervisor sees the complete request */
|
mb();
|
rc = plpar_hcall_norets(H_SEND_SUB_CRQ_INDIRECT, ua,
|
cpu_to_be64(remote_handle),
|
ioba, num_entries);
|
|
if (rc)
|
print_subcrq_error(dev, rc, __func__);
|
|
return rc;
|
}
|
|
static int ibmvnic_send_crq(struct ibmvnic_adapter *adapter,
|
union ibmvnic_crq *crq)
|
{
|
unsigned int ua = adapter->vdev->unit_address;
|
struct device *dev = &adapter->vdev->dev;
|
u64 *u64_crq = (u64 *)crq;
|
int rc;
|
|
netdev_dbg(adapter->netdev, "Sending CRQ: %016lx %016lx\n",
|
(unsigned long int)cpu_to_be64(u64_crq[0]),
|
(unsigned long int)cpu_to_be64(u64_crq[1]));
|
|
if (!adapter->crq.active &&
|
crq->generic.first != IBMVNIC_CRQ_INIT_CMD) {
|
dev_warn(dev, "Invalid request detected while CRQ is inactive, possible device state change during reset\n");
|
return -EINVAL;
|
}
|
|
/* Make sure the hypervisor sees the complete request */
|
mb();
|
|
rc = plpar_hcall_norets(H_SEND_CRQ, ua,
|
cpu_to_be64(u64_crq[0]),
|
cpu_to_be64(u64_crq[1]));
|
|
if (rc) {
|
if (rc == H_CLOSED) {
|
dev_warn(dev, "CRQ Queue closed\n");
|
/* do not reset, report the fail, wait for passive init from server */
|
}
|
|
dev_warn(dev, "Send error (rc=%d)\n", rc);
|
}
|
|
return rc;
|
}
|
|
static int ibmvnic_send_crq_init(struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
union ibmvnic_crq crq;
|
int retries = 100;
|
int rc;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.generic.first = IBMVNIC_CRQ_INIT_CMD;
|
crq.generic.cmd = IBMVNIC_CRQ_INIT;
|
netdev_dbg(adapter->netdev, "Sending CRQ init\n");
|
|
do {
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc != H_CLOSED)
|
break;
|
retries--;
|
msleep(50);
|
|
} while (retries > 0);
|
|
if (rc) {
|
dev_err(dev, "Failed to send init request, rc = %d\n", rc);
|
return rc;
|
}
|
|
return 0;
|
}
|
|
static int send_version_xchg(struct ibmvnic_adapter *adapter)
|
{
|
union ibmvnic_crq crq;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.version_exchange.first = IBMVNIC_CRQ_CMD;
|
crq.version_exchange.cmd = VERSION_EXCHANGE;
|
crq.version_exchange.version = cpu_to_be16(ibmvnic_version);
|
|
return ibmvnic_send_crq(adapter, &crq);
|
}
|
|
struct vnic_login_client_data {
|
u8 type;
|
__be16 len;
|
char name[];
|
} __packed;
|
|
static int vnic_client_data_len(struct ibmvnic_adapter *adapter)
|
{
|
int len;
|
|
/* Calculate the amount of buffer space needed for the
|
* vnic client data in the login buffer. There are four entries,
|
* OS name, LPAR name, device name, and a null last entry.
|
*/
|
len = 4 * sizeof(struct vnic_login_client_data);
|
len += 6; /* "Linux" plus NULL */
|
len += strlen(utsname()->nodename) + 1;
|
len += strlen(adapter->netdev->name) + 1;
|
|
return len;
|
}
|
|
static void vnic_add_client_data(struct ibmvnic_adapter *adapter,
|
struct vnic_login_client_data *vlcd)
|
{
|
const char *os_name = "Linux";
|
int len;
|
|
/* Type 1 - LPAR OS */
|
vlcd->type = 1;
|
len = strlen(os_name) + 1;
|
vlcd->len = cpu_to_be16(len);
|
strncpy(vlcd->name, os_name, len);
|
vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
|
|
/* Type 2 - LPAR name */
|
vlcd->type = 2;
|
len = strlen(utsname()->nodename) + 1;
|
vlcd->len = cpu_to_be16(len);
|
strncpy(vlcd->name, utsname()->nodename, len);
|
vlcd = (struct vnic_login_client_data *)(vlcd->name + len);
|
|
/* Type 3 - device name */
|
vlcd->type = 3;
|
len = strlen(adapter->netdev->name) + 1;
|
vlcd->len = cpu_to_be16(len);
|
strncpy(vlcd->name, adapter->netdev->name, len);
|
}
|
|
static int send_login(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_login_rsp_buffer *login_rsp_buffer;
|
struct ibmvnic_login_buffer *login_buffer;
|
struct device *dev = &adapter->vdev->dev;
|
struct vnic_login_client_data *vlcd;
|
dma_addr_t rsp_buffer_token;
|
dma_addr_t buffer_token;
|
size_t rsp_buffer_size;
|
union ibmvnic_crq crq;
|
int client_data_len;
|
size_t buffer_size;
|
__be64 *tx_list_p;
|
__be64 *rx_list_p;
|
int rc;
|
int i;
|
|
if (!adapter->tx_scrq || !adapter->rx_scrq) {
|
netdev_err(adapter->netdev,
|
"RX or TX queues are not allocated, device login failed\n");
|
return -1;
|
}
|
|
release_login_buffer(adapter);
|
release_login_rsp_buffer(adapter);
|
|
client_data_len = vnic_client_data_len(adapter);
|
|
buffer_size =
|
sizeof(struct ibmvnic_login_buffer) +
|
sizeof(u64) * (adapter->req_tx_queues + adapter->req_rx_queues) +
|
client_data_len;
|
|
login_buffer = kzalloc(buffer_size, GFP_ATOMIC);
|
if (!login_buffer)
|
goto buf_alloc_failed;
|
|
buffer_token = dma_map_single(dev, login_buffer, buffer_size,
|
DMA_TO_DEVICE);
|
if (dma_mapping_error(dev, buffer_token)) {
|
dev_err(dev, "Couldn't map login buffer\n");
|
goto buf_map_failed;
|
}
|
|
rsp_buffer_size = sizeof(struct ibmvnic_login_rsp_buffer) +
|
sizeof(u64) * adapter->req_tx_queues +
|
sizeof(u64) * adapter->req_rx_queues +
|
sizeof(u64) * adapter->req_rx_queues +
|
sizeof(u8) * IBMVNIC_TX_DESC_VERSIONS;
|
|
login_rsp_buffer = kmalloc(rsp_buffer_size, GFP_ATOMIC);
|
if (!login_rsp_buffer)
|
goto buf_rsp_alloc_failed;
|
|
rsp_buffer_token = dma_map_single(dev, login_rsp_buffer,
|
rsp_buffer_size, DMA_FROM_DEVICE);
|
if (dma_mapping_error(dev, rsp_buffer_token)) {
|
dev_err(dev, "Couldn't map login rsp buffer\n");
|
goto buf_rsp_map_failed;
|
}
|
|
adapter->login_buf = login_buffer;
|
adapter->login_buf_token = buffer_token;
|
adapter->login_buf_sz = buffer_size;
|
adapter->login_rsp_buf = login_rsp_buffer;
|
adapter->login_rsp_buf_token = rsp_buffer_token;
|
adapter->login_rsp_buf_sz = rsp_buffer_size;
|
|
login_buffer->len = cpu_to_be32(buffer_size);
|
login_buffer->version = cpu_to_be32(INITIAL_VERSION_LB);
|
login_buffer->num_txcomp_subcrqs = cpu_to_be32(adapter->req_tx_queues);
|
login_buffer->off_txcomp_subcrqs =
|
cpu_to_be32(sizeof(struct ibmvnic_login_buffer));
|
login_buffer->num_rxcomp_subcrqs = cpu_to_be32(adapter->req_rx_queues);
|
login_buffer->off_rxcomp_subcrqs =
|
cpu_to_be32(sizeof(struct ibmvnic_login_buffer) +
|
sizeof(u64) * adapter->req_tx_queues);
|
login_buffer->login_rsp_ioba = cpu_to_be32(rsp_buffer_token);
|
login_buffer->login_rsp_len = cpu_to_be32(rsp_buffer_size);
|
|
tx_list_p = (__be64 *)((char *)login_buffer +
|
sizeof(struct ibmvnic_login_buffer));
|
rx_list_p = (__be64 *)((char *)login_buffer +
|
sizeof(struct ibmvnic_login_buffer) +
|
sizeof(u64) * adapter->req_tx_queues);
|
|
for (i = 0; i < adapter->req_tx_queues; i++) {
|
if (adapter->tx_scrq[i]) {
|
tx_list_p[i] = cpu_to_be64(adapter->tx_scrq[i]->
|
crq_num);
|
}
|
}
|
|
for (i = 0; i < adapter->req_rx_queues; i++) {
|
if (adapter->rx_scrq[i]) {
|
rx_list_p[i] = cpu_to_be64(adapter->rx_scrq[i]->
|
crq_num);
|
}
|
}
|
|
/* Insert vNIC login client data */
|
vlcd = (struct vnic_login_client_data *)
|
((char *)rx_list_p + (sizeof(u64) * adapter->req_rx_queues));
|
login_buffer->client_data_offset =
|
cpu_to_be32((char *)vlcd - (char *)login_buffer);
|
login_buffer->client_data_len = cpu_to_be32(client_data_len);
|
|
vnic_add_client_data(adapter, vlcd);
|
|
netdev_dbg(adapter->netdev, "Login Buffer:\n");
|
for (i = 0; i < (adapter->login_buf_sz - 1) / 8 + 1; i++) {
|
netdev_dbg(adapter->netdev, "%016lx\n",
|
((unsigned long int *)(adapter->login_buf))[i]);
|
}
|
|
memset(&crq, 0, sizeof(crq));
|
crq.login.first = IBMVNIC_CRQ_CMD;
|
crq.login.cmd = LOGIN;
|
crq.login.ioba = cpu_to_be32(buffer_token);
|
crq.login.len = cpu_to_be32(buffer_size);
|
|
adapter->login_pending = true;
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc) {
|
adapter->login_pending = false;
|
netdev_err(adapter->netdev, "Failed to send login, rc=%d\n", rc);
|
goto buf_rsp_map_failed;
|
}
|
|
return 0;
|
|
buf_rsp_map_failed:
|
kfree(login_rsp_buffer);
|
adapter->login_rsp_buf = NULL;
|
buf_rsp_alloc_failed:
|
dma_unmap_single(dev, buffer_token, buffer_size, DMA_TO_DEVICE);
|
buf_map_failed:
|
kfree(login_buffer);
|
adapter->login_buf = NULL;
|
buf_alloc_failed:
|
return -1;
|
}
|
|
static int send_request_map(struct ibmvnic_adapter *adapter, dma_addr_t addr,
|
u32 len, u8 map_id)
|
{
|
union ibmvnic_crq crq;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.request_map.first = IBMVNIC_CRQ_CMD;
|
crq.request_map.cmd = REQUEST_MAP;
|
crq.request_map.map_id = map_id;
|
crq.request_map.ioba = cpu_to_be32(addr);
|
crq.request_map.len = cpu_to_be32(len);
|
return ibmvnic_send_crq(adapter, &crq);
|
}
|
|
static int send_request_unmap(struct ibmvnic_adapter *adapter, u8 map_id)
|
{
|
union ibmvnic_crq crq;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.request_unmap.first = IBMVNIC_CRQ_CMD;
|
crq.request_unmap.cmd = REQUEST_UNMAP;
|
crq.request_unmap.map_id = map_id;
|
return ibmvnic_send_crq(adapter, &crq);
|
}
|
|
static void send_query_map(struct ibmvnic_adapter *adapter)
|
{
|
union ibmvnic_crq crq;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.query_map.first = IBMVNIC_CRQ_CMD;
|
crq.query_map.cmd = QUERY_MAP;
|
ibmvnic_send_crq(adapter, &crq);
|
}
|
|
/* Send a series of CRQs requesting various capabilities of the VNIC server */
|
static void send_query_cap(struct ibmvnic_adapter *adapter)
|
{
|
union ibmvnic_crq crq;
|
int cap_reqs;
|
|
/* We send out 25 QUERY_CAPABILITY CRQs below. Initialize this count
|
* upfront. When the tasklet receives a response to all of these, it
|
* can send out the next protocol messaage (REQUEST_CAPABILITY).
|
*/
|
cap_reqs = 25;
|
|
atomic_set(&adapter->running_cap_crqs, cap_reqs);
|
|
memset(&crq, 0, sizeof(crq));
|
crq.query_capability.first = IBMVNIC_CRQ_CMD;
|
crq.query_capability.cmd = QUERY_CAPABILITY;
|
|
crq.query_capability.capability = cpu_to_be16(MIN_TX_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MIN_RX_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MIN_RX_ADD_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MAX_TX_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MAX_RX_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MAX_RX_ADD_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability =
|
cpu_to_be16(MIN_TX_ENTRIES_PER_SUBCRQ);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability =
|
cpu_to_be16(MIN_RX_ADD_ENTRIES_PER_SUBCRQ);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability =
|
cpu_to_be16(MAX_TX_ENTRIES_PER_SUBCRQ);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability =
|
cpu_to_be16(MAX_RX_ADD_ENTRIES_PER_SUBCRQ);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(TCP_IP_OFFLOAD);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(PROMISC_SUPPORTED);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MIN_MTU);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MAX_MTU);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MAX_MULTICAST_FILTERS);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(VLAN_HEADER_INSERTION);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(RX_VLAN_HEADER_INSERTION);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(MAX_TX_SG_ENTRIES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(RX_SG_SUPPORTED);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(OPT_TX_COMP_SUB_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(OPT_RX_COMP_QUEUES);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability =
|
cpu_to_be16(OPT_RX_BUFADD_Q_PER_RX_COMP_Q);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability =
|
cpu_to_be16(OPT_TX_ENTRIES_PER_SUBCRQ);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability =
|
cpu_to_be16(OPT_RXBA_ENTRIES_PER_SUBCRQ);
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
crq.query_capability.capability = cpu_to_be16(TX_RX_DESC_REQ);
|
|
ibmvnic_send_crq(adapter, &crq);
|
cap_reqs--;
|
|
/* Keep at end to catch any discrepancy between expected and actual
|
* CRQs sent.
|
*/
|
WARN_ON(cap_reqs != 0);
|
}
|
|
static void send_query_ip_offload(struct ibmvnic_adapter *adapter)
|
{
|
int buf_sz = sizeof(struct ibmvnic_query_ip_offload_buffer);
|
struct device *dev = &adapter->vdev->dev;
|
union ibmvnic_crq crq;
|
|
adapter->ip_offload_tok =
|
dma_map_single(dev,
|
&adapter->ip_offload_buf,
|
buf_sz,
|
DMA_FROM_DEVICE);
|
|
if (dma_mapping_error(dev, adapter->ip_offload_tok)) {
|
if (!firmware_has_feature(FW_FEATURE_CMO))
|
dev_err(dev, "Couldn't map offload buffer\n");
|
return;
|
}
|
|
memset(&crq, 0, sizeof(crq));
|
crq.query_ip_offload.first = IBMVNIC_CRQ_CMD;
|
crq.query_ip_offload.cmd = QUERY_IP_OFFLOAD;
|
crq.query_ip_offload.len = cpu_to_be32(buf_sz);
|
crq.query_ip_offload.ioba =
|
cpu_to_be32(adapter->ip_offload_tok);
|
|
ibmvnic_send_crq(adapter, &crq);
|
}
|
|
static void send_control_ip_offload(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_control_ip_offload_buffer *ctrl_buf = &adapter->ip_offload_ctrl;
|
struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
|
struct device *dev = &adapter->vdev->dev;
|
netdev_features_t old_hw_features = 0;
|
union ibmvnic_crq crq;
|
|
adapter->ip_offload_ctrl_tok =
|
dma_map_single(dev,
|
ctrl_buf,
|
sizeof(adapter->ip_offload_ctrl),
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(dev, adapter->ip_offload_ctrl_tok)) {
|
dev_err(dev, "Couldn't map ip offload control buffer\n");
|
return;
|
}
|
|
ctrl_buf->len = cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
|
ctrl_buf->version = cpu_to_be32(INITIAL_VERSION_IOB);
|
ctrl_buf->ipv4_chksum = buf->ipv4_chksum;
|
ctrl_buf->ipv6_chksum = buf->ipv6_chksum;
|
ctrl_buf->tcp_ipv4_chksum = buf->tcp_ipv4_chksum;
|
ctrl_buf->udp_ipv4_chksum = buf->udp_ipv4_chksum;
|
ctrl_buf->tcp_ipv6_chksum = buf->tcp_ipv6_chksum;
|
ctrl_buf->udp_ipv6_chksum = buf->udp_ipv6_chksum;
|
ctrl_buf->large_tx_ipv4 = buf->large_tx_ipv4;
|
ctrl_buf->large_tx_ipv6 = buf->large_tx_ipv6;
|
|
/* large_rx disabled for now, additional features needed */
|
ctrl_buf->large_rx_ipv4 = 0;
|
ctrl_buf->large_rx_ipv6 = 0;
|
|
if (adapter->state != VNIC_PROBING) {
|
old_hw_features = adapter->netdev->hw_features;
|
adapter->netdev->hw_features = 0;
|
}
|
|
adapter->netdev->hw_features = NETIF_F_SG | NETIF_F_GSO | NETIF_F_GRO;
|
|
if (buf->tcp_ipv4_chksum || buf->udp_ipv4_chksum)
|
adapter->netdev->hw_features |= NETIF_F_IP_CSUM;
|
|
if (buf->tcp_ipv6_chksum || buf->udp_ipv6_chksum)
|
adapter->netdev->hw_features |= NETIF_F_IPV6_CSUM;
|
|
if ((adapter->netdev->features &
|
(NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM)))
|
adapter->netdev->hw_features |= NETIF_F_RXCSUM;
|
|
if (buf->large_tx_ipv4)
|
adapter->netdev->hw_features |= NETIF_F_TSO;
|
if (buf->large_tx_ipv6)
|
adapter->netdev->hw_features |= NETIF_F_TSO6;
|
|
if (adapter->state == VNIC_PROBING) {
|
adapter->netdev->features |= adapter->netdev->hw_features;
|
} else if (old_hw_features != adapter->netdev->hw_features) {
|
netdev_features_t tmp = 0;
|
|
/* disable features no longer supported */
|
adapter->netdev->features &= adapter->netdev->hw_features;
|
/* turn on features now supported if previously enabled */
|
tmp = (old_hw_features ^ adapter->netdev->hw_features) &
|
adapter->netdev->hw_features;
|
adapter->netdev->features |=
|
tmp & adapter->netdev->wanted_features;
|
}
|
|
memset(&crq, 0, sizeof(crq));
|
crq.control_ip_offload.first = IBMVNIC_CRQ_CMD;
|
crq.control_ip_offload.cmd = CONTROL_IP_OFFLOAD;
|
crq.control_ip_offload.len =
|
cpu_to_be32(sizeof(adapter->ip_offload_ctrl));
|
crq.control_ip_offload.ioba = cpu_to_be32(adapter->ip_offload_ctrl_tok);
|
ibmvnic_send_crq(adapter, &crq);
|
}
|
|
static void handle_vpd_size_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
|
if (crq->get_vpd_size_rsp.rc.code) {
|
dev_err(dev, "Error retrieving VPD size, rc=%x\n",
|
crq->get_vpd_size_rsp.rc.code);
|
complete(&adapter->fw_done);
|
return;
|
}
|
|
adapter->vpd->len = be64_to_cpu(crq->get_vpd_size_rsp.len);
|
complete(&adapter->fw_done);
|
}
|
|
static void handle_vpd_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
unsigned char *substr = NULL;
|
u8 fw_level_len = 0;
|
|
memset(adapter->fw_version, 0, 32);
|
|
dma_unmap_single(dev, adapter->vpd->dma_addr, adapter->vpd->len,
|
DMA_FROM_DEVICE);
|
|
if (crq->get_vpd_rsp.rc.code) {
|
dev_err(dev, "Error retrieving VPD from device, rc=%x\n",
|
crq->get_vpd_rsp.rc.code);
|
goto complete;
|
}
|
|
/* get the position of the firmware version info
|
* located after the ASCII 'RM' substring in the buffer
|
*/
|
substr = strnstr(adapter->vpd->buff, "RM", adapter->vpd->len);
|
if (!substr) {
|
dev_info(dev, "Warning - No FW level has been provided in the VPD buffer by the VIOS Server\n");
|
goto complete;
|
}
|
|
/* get length of firmware level ASCII substring */
|
if ((substr + 2) < (adapter->vpd->buff + adapter->vpd->len)) {
|
fw_level_len = *(substr + 2);
|
} else {
|
dev_info(dev, "Length of FW substr extrapolated VDP buff\n");
|
goto complete;
|
}
|
|
/* copy firmware version string from vpd into adapter */
|
if ((substr + 3 + fw_level_len) <
|
(adapter->vpd->buff + adapter->vpd->len)) {
|
strncpy((char *)adapter->fw_version, substr + 3, fw_level_len);
|
} else {
|
dev_info(dev, "FW substr extrapolated VPD buff\n");
|
}
|
|
complete:
|
if (adapter->fw_version[0] == '\0')
|
strncpy((char *)adapter->fw_version, "N/A", 3 * sizeof(char));
|
complete(&adapter->fw_done);
|
}
|
|
static void handle_query_ip_offload_rsp(struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
struct ibmvnic_query_ip_offload_buffer *buf = &adapter->ip_offload_buf;
|
int i;
|
|
dma_unmap_single(dev, adapter->ip_offload_tok,
|
sizeof(adapter->ip_offload_buf), DMA_FROM_DEVICE);
|
|
netdev_dbg(adapter->netdev, "Query IP Offload Buffer:\n");
|
for (i = 0; i < (sizeof(adapter->ip_offload_buf) - 1) / 8 + 1; i++)
|
netdev_dbg(adapter->netdev, "%016lx\n",
|
((unsigned long int *)(buf))[i]);
|
|
netdev_dbg(adapter->netdev, "ipv4_chksum = %d\n", buf->ipv4_chksum);
|
netdev_dbg(adapter->netdev, "ipv6_chksum = %d\n", buf->ipv6_chksum);
|
netdev_dbg(adapter->netdev, "tcp_ipv4_chksum = %d\n",
|
buf->tcp_ipv4_chksum);
|
netdev_dbg(adapter->netdev, "tcp_ipv6_chksum = %d\n",
|
buf->tcp_ipv6_chksum);
|
netdev_dbg(adapter->netdev, "udp_ipv4_chksum = %d\n",
|
buf->udp_ipv4_chksum);
|
netdev_dbg(adapter->netdev, "udp_ipv6_chksum = %d\n",
|
buf->udp_ipv6_chksum);
|
netdev_dbg(adapter->netdev, "large_tx_ipv4 = %d\n",
|
buf->large_tx_ipv4);
|
netdev_dbg(adapter->netdev, "large_tx_ipv6 = %d\n",
|
buf->large_tx_ipv6);
|
netdev_dbg(adapter->netdev, "large_rx_ipv4 = %d\n",
|
buf->large_rx_ipv4);
|
netdev_dbg(adapter->netdev, "large_rx_ipv6 = %d\n",
|
buf->large_rx_ipv6);
|
netdev_dbg(adapter->netdev, "max_ipv4_hdr_sz = %d\n",
|
buf->max_ipv4_header_size);
|
netdev_dbg(adapter->netdev, "max_ipv6_hdr_sz = %d\n",
|
buf->max_ipv6_header_size);
|
netdev_dbg(adapter->netdev, "max_tcp_hdr_size = %d\n",
|
buf->max_tcp_header_size);
|
netdev_dbg(adapter->netdev, "max_udp_hdr_size = %d\n",
|
buf->max_udp_header_size);
|
netdev_dbg(adapter->netdev, "max_large_tx_size = %d\n",
|
buf->max_large_tx_size);
|
netdev_dbg(adapter->netdev, "max_large_rx_size = %d\n",
|
buf->max_large_rx_size);
|
netdev_dbg(adapter->netdev, "ipv6_ext_hdr = %d\n",
|
buf->ipv6_extension_header);
|
netdev_dbg(adapter->netdev, "tcp_pseudosum_req = %d\n",
|
buf->tcp_pseudosum_req);
|
netdev_dbg(adapter->netdev, "num_ipv6_ext_hd = %d\n",
|
buf->num_ipv6_ext_headers);
|
netdev_dbg(adapter->netdev, "off_ipv6_ext_hd = %d\n",
|
buf->off_ipv6_ext_headers);
|
|
send_control_ip_offload(adapter);
|
}
|
|
static const char *ibmvnic_fw_err_cause(u16 cause)
|
{
|
switch (cause) {
|
case ADAPTER_PROBLEM:
|
return "adapter problem";
|
case BUS_PROBLEM:
|
return "bus problem";
|
case FW_PROBLEM:
|
return "firmware problem";
|
case DD_PROBLEM:
|
return "device driver problem";
|
case EEH_RECOVERY:
|
return "EEH recovery";
|
case FW_UPDATED:
|
return "firmware updated";
|
case LOW_MEMORY:
|
return "low Memory";
|
default:
|
return "unknown";
|
}
|
}
|
|
static void handle_error_indication(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
u16 cause;
|
|
cause = be16_to_cpu(crq->error_indication.error_cause);
|
|
dev_warn_ratelimited(dev,
|
"Firmware reports %serror, cause: %s. Starting recovery...\n",
|
crq->error_indication.flags
|
& IBMVNIC_FATAL_ERROR ? "FATAL " : "",
|
ibmvnic_fw_err_cause(cause));
|
|
if (crq->error_indication.flags & IBMVNIC_FATAL_ERROR)
|
ibmvnic_reset(adapter, VNIC_RESET_FATAL);
|
else
|
ibmvnic_reset(adapter, VNIC_RESET_NON_FATAL);
|
}
|
|
static int handle_change_mac_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct net_device *netdev = adapter->netdev;
|
struct device *dev = &adapter->vdev->dev;
|
long rc;
|
|
rc = crq->change_mac_addr_rsp.rc.code;
|
if (rc) {
|
dev_err(dev, "Error %ld in CHANGE_MAC_ADDR_RSP\n", rc);
|
goto out;
|
}
|
/* crq->change_mac_addr.mac_addr is the requested one
|
* crq->change_mac_addr_rsp.mac_addr is the returned valid one.
|
*/
|
ether_addr_copy(netdev->dev_addr,
|
&crq->change_mac_addr_rsp.mac_addr[0]);
|
ether_addr_copy(adapter->mac_addr,
|
&crq->change_mac_addr_rsp.mac_addr[0]);
|
out:
|
complete(&adapter->fw_done);
|
return rc;
|
}
|
|
static void handle_request_cap_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
u64 *req_value;
|
char *name;
|
|
atomic_dec(&adapter->running_cap_crqs);
|
netdev_dbg(adapter->netdev, "Outstanding request-caps: %d\n",
|
atomic_read(&adapter->running_cap_crqs));
|
switch (be16_to_cpu(crq->request_capability_rsp.capability)) {
|
case REQ_TX_QUEUES:
|
req_value = &adapter->req_tx_queues;
|
name = "tx";
|
break;
|
case REQ_RX_QUEUES:
|
req_value = &adapter->req_rx_queues;
|
name = "rx";
|
break;
|
case REQ_RX_ADD_QUEUES:
|
req_value = &adapter->req_rx_add_queues;
|
name = "rx_add";
|
break;
|
case REQ_TX_ENTRIES_PER_SUBCRQ:
|
req_value = &adapter->req_tx_entries_per_subcrq;
|
name = "tx_entries_per_subcrq";
|
break;
|
case REQ_RX_ADD_ENTRIES_PER_SUBCRQ:
|
req_value = &adapter->req_rx_add_entries_per_subcrq;
|
name = "rx_add_entries_per_subcrq";
|
break;
|
case REQ_MTU:
|
req_value = &adapter->req_mtu;
|
name = "mtu";
|
break;
|
case PROMISC_REQUESTED:
|
req_value = &adapter->promisc;
|
name = "promisc";
|
break;
|
default:
|
dev_err(dev, "Got invalid cap request rsp %d\n",
|
crq->request_capability.capability);
|
return;
|
}
|
|
switch (crq->request_capability_rsp.rc.code) {
|
case SUCCESS:
|
break;
|
case PARTIALSUCCESS:
|
dev_info(dev, "req=%lld, rsp=%ld in %s queue, retrying.\n",
|
*req_value,
|
(long int)be64_to_cpu(crq->request_capability_rsp.
|
number), name);
|
|
if (be16_to_cpu(crq->request_capability_rsp.capability) ==
|
REQ_MTU) {
|
pr_err("mtu of %llu is not supported. Reverting.\n",
|
*req_value);
|
*req_value = adapter->fallback.mtu;
|
} else {
|
*req_value =
|
be64_to_cpu(crq->request_capability_rsp.number);
|
}
|
|
send_request_cap(adapter, 1);
|
return;
|
default:
|
dev_err(dev, "Error %d in request cap rsp\n",
|
crq->request_capability_rsp.rc.code);
|
return;
|
}
|
|
/* Done receiving requested capabilities, query IP offload support */
|
if (atomic_read(&adapter->running_cap_crqs) == 0) {
|
adapter->wait_capability = false;
|
send_query_ip_offload(adapter);
|
}
|
}
|
|
static int handle_login_rsp(union ibmvnic_crq *login_rsp_crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
struct net_device *netdev = adapter->netdev;
|
struct ibmvnic_login_rsp_buffer *login_rsp = adapter->login_rsp_buf;
|
struct ibmvnic_login_buffer *login = adapter->login_buf;
|
u64 *tx_handle_array;
|
u64 *rx_handle_array;
|
int num_tx_pools;
|
int num_rx_pools;
|
u64 *size_array;
|
int i;
|
|
/* CHECK: Test/set of login_pending does not need to be atomic
|
* because only ibmvnic_tasklet tests/clears this.
|
*/
|
if (!adapter->login_pending) {
|
netdev_warn(netdev, "Ignoring unexpected login response\n");
|
return 0;
|
}
|
adapter->login_pending = false;
|
|
dma_unmap_single(dev, adapter->login_buf_token, adapter->login_buf_sz,
|
DMA_TO_DEVICE);
|
dma_unmap_single(dev, adapter->login_rsp_buf_token,
|
adapter->login_rsp_buf_sz, DMA_FROM_DEVICE);
|
|
/* If the number of queues requested can't be allocated by the
|
* server, the login response will return with code 1. We will need
|
* to resend the login buffer with fewer queues requested.
|
*/
|
if (login_rsp_crq->generic.rc.code) {
|
adapter->init_done_rc = login_rsp_crq->generic.rc.code;
|
complete(&adapter->init_done);
|
return 0;
|
}
|
|
if (adapter->failover_pending) {
|
adapter->init_done_rc = -EAGAIN;
|
netdev_dbg(netdev, "Failover pending, ignoring login response\n");
|
complete(&adapter->init_done);
|
/* login response buffer will be released on reset */
|
return 0;
|
}
|
|
netdev->mtu = adapter->req_mtu - ETH_HLEN;
|
|
netdev_dbg(adapter->netdev, "Login Response Buffer:\n");
|
for (i = 0; i < (adapter->login_rsp_buf_sz - 1) / 8 + 1; i++) {
|
netdev_dbg(adapter->netdev, "%016lx\n",
|
((unsigned long int *)(adapter->login_rsp_buf))[i]);
|
}
|
|
/* Sanity checks */
|
if (login->num_txcomp_subcrqs != login_rsp->num_txsubm_subcrqs ||
|
(be32_to_cpu(login->num_rxcomp_subcrqs) *
|
adapter->req_rx_add_queues !=
|
be32_to_cpu(login_rsp->num_rxadd_subcrqs))) {
|
dev_err(dev, "FATAL: Inconsistent login and login rsp\n");
|
ibmvnic_reset(adapter, VNIC_RESET_FATAL);
|
return -EIO;
|
}
|
size_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
|
be32_to_cpu(adapter->login_rsp_buf->off_rxadd_buff_size));
|
/* variable buffer sizes are not supported, so just read the
|
* first entry.
|
*/
|
adapter->cur_rx_buf_sz = be64_to_cpu(size_array[0]);
|
|
num_tx_pools = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs);
|
num_rx_pools = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs);
|
|
tx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
|
be32_to_cpu(adapter->login_rsp_buf->off_txsubm_subcrqs));
|
rx_handle_array = (u64 *)((u8 *)(adapter->login_rsp_buf) +
|
be32_to_cpu(adapter->login_rsp_buf->off_rxadd_subcrqs));
|
|
for (i = 0; i < num_tx_pools; i++)
|
adapter->tx_scrq[i]->handle = tx_handle_array[i];
|
|
for (i = 0; i < num_rx_pools; i++)
|
adapter->rx_scrq[i]->handle = rx_handle_array[i];
|
|
adapter->num_active_tx_scrqs = num_tx_pools;
|
adapter->num_active_rx_scrqs = num_rx_pools;
|
release_login_rsp_buffer(adapter);
|
release_login_buffer(adapter);
|
complete(&adapter->init_done);
|
|
return 0;
|
}
|
|
static void handle_request_unmap_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
long rc;
|
|
rc = crq->request_unmap_rsp.rc.code;
|
if (rc)
|
dev_err(dev, "Error %ld in REQUEST_UNMAP_RSP\n", rc);
|
}
|
|
static void handle_query_map_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct net_device *netdev = adapter->netdev;
|
struct device *dev = &adapter->vdev->dev;
|
long rc;
|
|
rc = crq->query_map_rsp.rc.code;
|
if (rc) {
|
dev_err(dev, "Error %ld in QUERY_MAP_RSP\n", rc);
|
return;
|
}
|
netdev_dbg(netdev, "page_size = %d\ntot_pages = %d\nfree_pages = %d\n",
|
crq->query_map_rsp.page_size, crq->query_map_rsp.tot_pages,
|
crq->query_map_rsp.free_pages);
|
}
|
|
static void handle_query_cap_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct net_device *netdev = adapter->netdev;
|
struct device *dev = &adapter->vdev->dev;
|
long rc;
|
|
atomic_dec(&adapter->running_cap_crqs);
|
netdev_dbg(netdev, "Outstanding queries: %d\n",
|
atomic_read(&adapter->running_cap_crqs));
|
rc = crq->query_capability.rc.code;
|
if (rc) {
|
dev_err(dev, "Error %ld in QUERY_CAP_RSP\n", rc);
|
goto out;
|
}
|
|
switch (be16_to_cpu(crq->query_capability.capability)) {
|
case MIN_TX_QUEUES:
|
adapter->min_tx_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "min_tx_queues = %lld\n",
|
adapter->min_tx_queues);
|
break;
|
case MIN_RX_QUEUES:
|
adapter->min_rx_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "min_rx_queues = %lld\n",
|
adapter->min_rx_queues);
|
break;
|
case MIN_RX_ADD_QUEUES:
|
adapter->min_rx_add_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "min_rx_add_queues = %lld\n",
|
adapter->min_rx_add_queues);
|
break;
|
case MAX_TX_QUEUES:
|
adapter->max_tx_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "max_tx_queues = %lld\n",
|
adapter->max_tx_queues);
|
break;
|
case MAX_RX_QUEUES:
|
adapter->max_rx_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "max_rx_queues = %lld\n",
|
adapter->max_rx_queues);
|
break;
|
case MAX_RX_ADD_QUEUES:
|
adapter->max_rx_add_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "max_rx_add_queues = %lld\n",
|
adapter->max_rx_add_queues);
|
break;
|
case MIN_TX_ENTRIES_PER_SUBCRQ:
|
adapter->min_tx_entries_per_subcrq =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "min_tx_entries_per_subcrq = %lld\n",
|
adapter->min_tx_entries_per_subcrq);
|
break;
|
case MIN_RX_ADD_ENTRIES_PER_SUBCRQ:
|
adapter->min_rx_add_entries_per_subcrq =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "min_rx_add_entrs_per_subcrq = %lld\n",
|
adapter->min_rx_add_entries_per_subcrq);
|
break;
|
case MAX_TX_ENTRIES_PER_SUBCRQ:
|
adapter->max_tx_entries_per_subcrq =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "max_tx_entries_per_subcrq = %lld\n",
|
adapter->max_tx_entries_per_subcrq);
|
break;
|
case MAX_RX_ADD_ENTRIES_PER_SUBCRQ:
|
adapter->max_rx_add_entries_per_subcrq =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "max_rx_add_entrs_per_subcrq = %lld\n",
|
adapter->max_rx_add_entries_per_subcrq);
|
break;
|
case TCP_IP_OFFLOAD:
|
adapter->tcp_ip_offload =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "tcp_ip_offload = %lld\n",
|
adapter->tcp_ip_offload);
|
break;
|
case PROMISC_SUPPORTED:
|
adapter->promisc_supported =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "promisc_supported = %lld\n",
|
adapter->promisc_supported);
|
break;
|
case MIN_MTU:
|
adapter->min_mtu = be64_to_cpu(crq->query_capability.number);
|
netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
|
netdev_dbg(netdev, "min_mtu = %lld\n", adapter->min_mtu);
|
break;
|
case MAX_MTU:
|
adapter->max_mtu = be64_to_cpu(crq->query_capability.number);
|
netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
|
netdev_dbg(netdev, "max_mtu = %lld\n", adapter->max_mtu);
|
break;
|
case MAX_MULTICAST_FILTERS:
|
adapter->max_multicast_filters =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "max_multicast_filters = %lld\n",
|
adapter->max_multicast_filters);
|
break;
|
case VLAN_HEADER_INSERTION:
|
adapter->vlan_header_insertion =
|
be64_to_cpu(crq->query_capability.number);
|
if (adapter->vlan_header_insertion)
|
netdev->features |= NETIF_F_HW_VLAN_STAG_TX;
|
netdev_dbg(netdev, "vlan_header_insertion = %lld\n",
|
adapter->vlan_header_insertion);
|
break;
|
case RX_VLAN_HEADER_INSERTION:
|
adapter->rx_vlan_header_insertion =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "rx_vlan_header_insertion = %lld\n",
|
adapter->rx_vlan_header_insertion);
|
break;
|
case MAX_TX_SG_ENTRIES:
|
adapter->max_tx_sg_entries =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "max_tx_sg_entries = %lld\n",
|
adapter->max_tx_sg_entries);
|
break;
|
case RX_SG_SUPPORTED:
|
adapter->rx_sg_supported =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "rx_sg_supported = %lld\n",
|
adapter->rx_sg_supported);
|
break;
|
case OPT_TX_COMP_SUB_QUEUES:
|
adapter->opt_tx_comp_sub_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "opt_tx_comp_sub_queues = %lld\n",
|
adapter->opt_tx_comp_sub_queues);
|
break;
|
case OPT_RX_COMP_QUEUES:
|
adapter->opt_rx_comp_queues =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "opt_rx_comp_queues = %lld\n",
|
adapter->opt_rx_comp_queues);
|
break;
|
case OPT_RX_BUFADD_Q_PER_RX_COMP_Q:
|
adapter->opt_rx_bufadd_q_per_rx_comp_q =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "opt_rx_bufadd_q_per_rx_comp_q = %lld\n",
|
adapter->opt_rx_bufadd_q_per_rx_comp_q);
|
break;
|
case OPT_TX_ENTRIES_PER_SUBCRQ:
|
adapter->opt_tx_entries_per_subcrq =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "opt_tx_entries_per_subcrq = %lld\n",
|
adapter->opt_tx_entries_per_subcrq);
|
break;
|
case OPT_RXBA_ENTRIES_PER_SUBCRQ:
|
adapter->opt_rxba_entries_per_subcrq =
|
be64_to_cpu(crq->query_capability.number);
|
netdev_dbg(netdev, "opt_rxba_entries_per_subcrq = %lld\n",
|
adapter->opt_rxba_entries_per_subcrq);
|
break;
|
case TX_RX_DESC_REQ:
|
adapter->tx_rx_desc_req = crq->query_capability.number;
|
netdev_dbg(netdev, "tx_rx_desc_req = %llx\n",
|
adapter->tx_rx_desc_req);
|
break;
|
|
default:
|
netdev_err(netdev, "Got invalid cap rsp %d\n",
|
crq->query_capability.capability);
|
}
|
|
out:
|
if (atomic_read(&adapter->running_cap_crqs) == 0) {
|
adapter->wait_capability = false;
|
send_request_cap(adapter, 0);
|
}
|
}
|
|
static int send_query_phys_parms(struct ibmvnic_adapter *adapter)
|
{
|
union ibmvnic_crq crq;
|
int rc;
|
|
memset(&crq, 0, sizeof(crq));
|
crq.query_phys_parms.first = IBMVNIC_CRQ_CMD;
|
crq.query_phys_parms.cmd = QUERY_PHYS_PARMS;
|
|
mutex_lock(&adapter->fw_lock);
|
adapter->fw_done_rc = 0;
|
reinit_completion(&adapter->fw_done);
|
|
rc = ibmvnic_send_crq(adapter, &crq);
|
if (rc) {
|
mutex_unlock(&adapter->fw_lock);
|
return rc;
|
}
|
|
rc = ibmvnic_wait_for_completion(adapter, &adapter->fw_done, 10000);
|
if (rc) {
|
mutex_unlock(&adapter->fw_lock);
|
return rc;
|
}
|
|
mutex_unlock(&adapter->fw_lock);
|
return adapter->fw_done_rc ? -EIO : 0;
|
}
|
|
static int handle_query_phys_parms_rsp(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct net_device *netdev = adapter->netdev;
|
int rc;
|
__be32 rspeed = cpu_to_be32(crq->query_phys_parms_rsp.speed);
|
|
rc = crq->query_phys_parms_rsp.rc.code;
|
if (rc) {
|
netdev_err(netdev, "Error %d in QUERY_PHYS_PARMS\n", rc);
|
return rc;
|
}
|
switch (rspeed) {
|
case IBMVNIC_10MBPS:
|
adapter->speed = SPEED_10;
|
break;
|
case IBMVNIC_100MBPS:
|
adapter->speed = SPEED_100;
|
break;
|
case IBMVNIC_1GBPS:
|
adapter->speed = SPEED_1000;
|
break;
|
case IBMVNIC_10GBPS:
|
adapter->speed = SPEED_10000;
|
break;
|
case IBMVNIC_25GBPS:
|
adapter->speed = SPEED_25000;
|
break;
|
case IBMVNIC_40GBPS:
|
adapter->speed = SPEED_40000;
|
break;
|
case IBMVNIC_50GBPS:
|
adapter->speed = SPEED_50000;
|
break;
|
case IBMVNIC_100GBPS:
|
adapter->speed = SPEED_100000;
|
break;
|
case IBMVNIC_200GBPS:
|
adapter->speed = SPEED_200000;
|
break;
|
default:
|
if (netif_carrier_ok(netdev))
|
netdev_warn(netdev, "Unknown speed 0x%08x\n", rspeed);
|
adapter->speed = SPEED_UNKNOWN;
|
}
|
if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_FULL_DUPLEX)
|
adapter->duplex = DUPLEX_FULL;
|
else if (crq->query_phys_parms_rsp.flags1 & IBMVNIC_HALF_DUPLEX)
|
adapter->duplex = DUPLEX_HALF;
|
else
|
adapter->duplex = DUPLEX_UNKNOWN;
|
|
return rc;
|
}
|
|
static void ibmvnic_handle_crq(union ibmvnic_crq *crq,
|
struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_generic_crq *gen_crq = &crq->generic;
|
struct net_device *netdev = adapter->netdev;
|
struct device *dev = &adapter->vdev->dev;
|
u64 *u64_crq = (u64 *)crq;
|
long rc;
|
|
netdev_dbg(netdev, "Handling CRQ: %016lx %016lx\n",
|
(unsigned long int)cpu_to_be64(u64_crq[0]),
|
(unsigned long int)cpu_to_be64(u64_crq[1]));
|
switch (gen_crq->first) {
|
case IBMVNIC_CRQ_INIT_RSP:
|
switch (gen_crq->cmd) {
|
case IBMVNIC_CRQ_INIT:
|
dev_info(dev, "Partner initialized\n");
|
adapter->from_passive_init = true;
|
/* Discard any stale login responses from prev reset.
|
* CHECK: should we clear even on INIT_COMPLETE?
|
*/
|
adapter->login_pending = false;
|
|
if (!completion_done(&adapter->init_done)) {
|
complete(&adapter->init_done);
|
adapter->init_done_rc = -EIO;
|
}
|
rc = ibmvnic_reset(adapter, VNIC_RESET_FAILOVER);
|
if (rc && rc != -EBUSY) {
|
/* We were unable to schedule the failover
|
* reset either because the adapter was still
|
* probing (eg: during kexec) or we could not
|
* allocate memory. Clear the failover_pending
|
* flag since no one else will. We ignore
|
* EBUSY because it means either FAILOVER reset
|
* is already scheduled or the adapter is
|
* being removed.
|
*/
|
netdev_err(netdev,
|
"Error %ld scheduling failover reset\n",
|
rc);
|
adapter->failover_pending = false;
|
}
|
break;
|
case IBMVNIC_CRQ_INIT_COMPLETE:
|
dev_info(dev, "Partner initialization complete\n");
|
adapter->crq.active = true;
|
send_version_xchg(adapter);
|
break;
|
default:
|
dev_err(dev, "Unknown crq cmd: %d\n", gen_crq->cmd);
|
}
|
return;
|
case IBMVNIC_CRQ_XPORT_EVENT:
|
netif_carrier_off(netdev);
|
adapter->crq.active = false;
|
/* terminate any thread waiting for a response
|
* from the device
|
*/
|
if (!completion_done(&adapter->fw_done)) {
|
adapter->fw_done_rc = -EIO;
|
complete(&adapter->fw_done);
|
}
|
|
/* if we got here during crq-init, retry crq-init */
|
if (!completion_done(&adapter->init_done)) {
|
adapter->init_done_rc = -EAGAIN;
|
complete(&adapter->init_done);
|
}
|
|
if (!completion_done(&adapter->stats_done))
|
complete(&adapter->stats_done);
|
if (test_bit(0, &adapter->resetting))
|
adapter->force_reset_recovery = true;
|
if (gen_crq->cmd == IBMVNIC_PARTITION_MIGRATED) {
|
dev_info(dev, "Migrated, re-enabling adapter\n");
|
ibmvnic_reset(adapter, VNIC_RESET_MOBILITY);
|
} else if (gen_crq->cmd == IBMVNIC_DEVICE_FAILOVER) {
|
dev_info(dev, "Backing device failover detected\n");
|
adapter->failover_pending = true;
|
} else {
|
/* The adapter lost the connection */
|
dev_err(dev, "Virtual Adapter failed (rc=%d)\n",
|
gen_crq->cmd);
|
ibmvnic_reset(adapter, VNIC_RESET_FATAL);
|
}
|
return;
|
case IBMVNIC_CRQ_CMD_RSP:
|
break;
|
default:
|
dev_err(dev, "Got an invalid msg type 0x%02x\n",
|
gen_crq->first);
|
return;
|
}
|
|
switch (gen_crq->cmd) {
|
case VERSION_EXCHANGE_RSP:
|
rc = crq->version_exchange_rsp.rc.code;
|
if (rc) {
|
dev_err(dev, "Error %ld in VERSION_EXCHG_RSP\n", rc);
|
break;
|
}
|
ibmvnic_version =
|
be16_to_cpu(crq->version_exchange_rsp.version);
|
dev_info(dev, "Partner protocol version is %d\n",
|
ibmvnic_version);
|
send_query_cap(adapter);
|
break;
|
case QUERY_CAPABILITY_RSP:
|
handle_query_cap_rsp(crq, adapter);
|
break;
|
case QUERY_MAP_RSP:
|
handle_query_map_rsp(crq, adapter);
|
break;
|
case REQUEST_MAP_RSP:
|
adapter->fw_done_rc = crq->request_map_rsp.rc.code;
|
complete(&adapter->fw_done);
|
break;
|
case REQUEST_UNMAP_RSP:
|
handle_request_unmap_rsp(crq, adapter);
|
break;
|
case REQUEST_CAPABILITY_RSP:
|
handle_request_cap_rsp(crq, adapter);
|
break;
|
case LOGIN_RSP:
|
netdev_dbg(netdev, "Got Login Response\n");
|
handle_login_rsp(crq, adapter);
|
break;
|
case LOGICAL_LINK_STATE_RSP:
|
netdev_dbg(netdev,
|
"Got Logical Link State Response, state: %d rc: %d\n",
|
crq->logical_link_state_rsp.link_state,
|
crq->logical_link_state_rsp.rc.code);
|
adapter->logical_link_state =
|
crq->logical_link_state_rsp.link_state;
|
adapter->init_done_rc = crq->logical_link_state_rsp.rc.code;
|
complete(&adapter->init_done);
|
break;
|
case LINK_STATE_INDICATION:
|
netdev_dbg(netdev, "Got Logical Link State Indication\n");
|
adapter->phys_link_state =
|
crq->link_state_indication.phys_link_state;
|
adapter->logical_link_state =
|
crq->link_state_indication.logical_link_state;
|
if (adapter->phys_link_state && adapter->logical_link_state)
|
netif_carrier_on(netdev);
|
else
|
netif_carrier_off(netdev);
|
break;
|
case CHANGE_MAC_ADDR_RSP:
|
netdev_dbg(netdev, "Got MAC address change Response\n");
|
adapter->fw_done_rc = handle_change_mac_rsp(crq, adapter);
|
break;
|
case ERROR_INDICATION:
|
netdev_dbg(netdev, "Got Error Indication\n");
|
handle_error_indication(crq, adapter);
|
break;
|
case REQUEST_STATISTICS_RSP:
|
netdev_dbg(netdev, "Got Statistics Response\n");
|
complete(&adapter->stats_done);
|
break;
|
case QUERY_IP_OFFLOAD_RSP:
|
netdev_dbg(netdev, "Got Query IP offload Response\n");
|
handle_query_ip_offload_rsp(adapter);
|
break;
|
case MULTICAST_CTRL_RSP:
|
netdev_dbg(netdev, "Got multicast control Response\n");
|
break;
|
case CONTROL_IP_OFFLOAD_RSP:
|
netdev_dbg(netdev, "Got Control IP offload Response\n");
|
dma_unmap_single(dev, adapter->ip_offload_ctrl_tok,
|
sizeof(adapter->ip_offload_ctrl),
|
DMA_TO_DEVICE);
|
complete(&adapter->init_done);
|
break;
|
case COLLECT_FW_TRACE_RSP:
|
netdev_dbg(netdev, "Got Collect firmware trace Response\n");
|
complete(&adapter->fw_done);
|
break;
|
case GET_VPD_SIZE_RSP:
|
handle_vpd_size_rsp(crq, adapter);
|
break;
|
case GET_VPD_RSP:
|
handle_vpd_rsp(crq, adapter);
|
break;
|
case QUERY_PHYS_PARMS_RSP:
|
adapter->fw_done_rc = handle_query_phys_parms_rsp(crq, adapter);
|
complete(&adapter->fw_done);
|
break;
|
default:
|
netdev_err(netdev, "Got an invalid cmd type 0x%02x\n",
|
gen_crq->cmd);
|
}
|
}
|
|
static irqreturn_t ibmvnic_interrupt(int irq, void *instance)
|
{
|
struct ibmvnic_adapter *adapter = instance;
|
|
tasklet_schedule(&adapter->tasklet);
|
return IRQ_HANDLED;
|
}
|
|
static void ibmvnic_tasklet(struct tasklet_struct *t)
|
{
|
struct ibmvnic_adapter *adapter = from_tasklet(adapter, t, tasklet);
|
struct ibmvnic_crq_queue *queue = &adapter->crq;
|
union ibmvnic_crq *crq;
|
unsigned long flags;
|
bool done = false;
|
|
spin_lock_irqsave(&queue->lock, flags);
|
while (!done) {
|
/* Pull all the valid messages off the CRQ */
|
while ((crq = ibmvnic_next_crq(adapter)) != NULL) {
|
/* This barrier makes sure ibmvnic_next_crq()'s
|
* crq->generic.first & IBMVNIC_CRQ_CMD_RSP is loaded
|
* before ibmvnic_handle_crq()'s
|
* switch(gen_crq->first) and switch(gen_crq->cmd).
|
*/
|
dma_rmb();
|
ibmvnic_handle_crq(crq, adapter);
|
crq->generic.first = 0;
|
}
|
}
|
/* if capabilities CRQ's were sent in this tasklet, the following
|
* tasklet must wait until all responses are received
|
*/
|
if (atomic_read(&adapter->running_cap_crqs) != 0)
|
adapter->wait_capability = true;
|
spin_unlock_irqrestore(&queue->lock, flags);
|
}
|
|
static int ibmvnic_reenable_crq_queue(struct ibmvnic_adapter *adapter)
|
{
|
struct vio_dev *vdev = adapter->vdev;
|
int rc;
|
|
do {
|
rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address);
|
} while (rc == H_IN_PROGRESS || rc == H_BUSY || H_IS_LONG_BUSY(rc));
|
|
if (rc)
|
dev_err(&vdev->dev, "Error enabling adapter (rc=%d)\n", rc);
|
|
return rc;
|
}
|
|
static int ibmvnic_reset_crq(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_crq_queue *crq = &adapter->crq;
|
struct device *dev = &adapter->vdev->dev;
|
struct vio_dev *vdev = adapter->vdev;
|
int rc;
|
|
/* Close the CRQ */
|
do {
|
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
|
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
|
|
/* Clean out the queue */
|
if (!crq->msgs)
|
return -EINVAL;
|
|
memset(crq->msgs, 0, PAGE_SIZE);
|
crq->cur = 0;
|
crq->active = false;
|
|
/* And re-open it again */
|
rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
|
crq->msg_token, PAGE_SIZE);
|
|
if (rc == H_CLOSED)
|
/* Adapter is good, but other end is not ready */
|
dev_warn(dev, "Partner adapter not ready\n");
|
else if (rc != 0)
|
dev_warn(dev, "Couldn't register crq (rc=%d)\n", rc);
|
|
return rc;
|
}
|
|
static void release_crq_queue(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_crq_queue *crq = &adapter->crq;
|
struct vio_dev *vdev = adapter->vdev;
|
long rc;
|
|
if (!crq->msgs)
|
return;
|
|
netdev_dbg(adapter->netdev, "Releasing CRQ\n");
|
free_irq(vdev->irq, adapter);
|
tasklet_kill(&adapter->tasklet);
|
do {
|
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
|
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
|
|
dma_unmap_single(&vdev->dev, crq->msg_token, PAGE_SIZE,
|
DMA_BIDIRECTIONAL);
|
free_page((unsigned long)crq->msgs);
|
crq->msgs = NULL;
|
crq->active = false;
|
}
|
|
static int init_crq_queue(struct ibmvnic_adapter *adapter)
|
{
|
struct ibmvnic_crq_queue *crq = &adapter->crq;
|
struct device *dev = &adapter->vdev->dev;
|
struct vio_dev *vdev = adapter->vdev;
|
int rc, retrc = -ENOMEM;
|
|
if (crq->msgs)
|
return 0;
|
|
crq->msgs = (union ibmvnic_crq *)get_zeroed_page(GFP_KERNEL);
|
/* Should we allocate more than one page? */
|
|
if (!crq->msgs)
|
return -ENOMEM;
|
|
crq->size = PAGE_SIZE / sizeof(*crq->msgs);
|
crq->msg_token = dma_map_single(dev, crq->msgs, PAGE_SIZE,
|
DMA_BIDIRECTIONAL);
|
if (dma_mapping_error(dev, crq->msg_token))
|
goto map_failed;
|
|
rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address,
|
crq->msg_token, PAGE_SIZE);
|
|
if (rc == H_RESOURCE)
|
/* maybe kexecing and resource is busy. try a reset */
|
rc = ibmvnic_reset_crq(adapter);
|
retrc = rc;
|
|
if (rc == H_CLOSED) {
|
dev_warn(dev, "Partner adapter not ready\n");
|
} else if (rc) {
|
dev_warn(dev, "Error %d opening adapter\n", rc);
|
goto reg_crq_failed;
|
}
|
|
retrc = 0;
|
|
tasklet_setup(&adapter->tasklet, (void *)ibmvnic_tasklet);
|
|
netdev_dbg(adapter->netdev, "registering irq 0x%x\n", vdev->irq);
|
snprintf(crq->name, sizeof(crq->name), "ibmvnic-%x",
|
adapter->vdev->unit_address);
|
rc = request_irq(vdev->irq, ibmvnic_interrupt, 0, crq->name, adapter);
|
if (rc) {
|
dev_err(dev, "Couldn't register irq 0x%x. rc=%d\n",
|
vdev->irq, rc);
|
goto req_irq_failed;
|
}
|
|
rc = vio_enable_interrupts(vdev);
|
if (rc) {
|
dev_err(dev, "Error %d enabling interrupts\n", rc);
|
goto req_irq_failed;
|
}
|
|
crq->cur = 0;
|
spin_lock_init(&crq->lock);
|
|
/* process any CRQs that were queued before we enabled interrupts */
|
tasklet_schedule(&adapter->tasklet);
|
|
return retrc;
|
|
req_irq_failed:
|
tasklet_kill(&adapter->tasklet);
|
do {
|
rc = plpar_hcall_norets(H_FREE_CRQ, vdev->unit_address);
|
} while (rc == H_BUSY || H_IS_LONG_BUSY(rc));
|
reg_crq_failed:
|
dma_unmap_single(dev, crq->msg_token, PAGE_SIZE, DMA_BIDIRECTIONAL);
|
map_failed:
|
free_page((unsigned long)crq->msgs);
|
crq->msgs = NULL;
|
return retrc;
|
}
|
|
static int ibmvnic_reset_init(struct ibmvnic_adapter *adapter, bool reset)
|
{
|
struct device *dev = &adapter->vdev->dev;
|
unsigned long timeout = msecs_to_jiffies(20000);
|
u64 old_num_rx_queues = adapter->req_rx_queues;
|
u64 old_num_tx_queues = adapter->req_tx_queues;
|
int rc;
|
|
adapter->from_passive_init = false;
|
|
if (reset)
|
reinit_completion(&adapter->init_done);
|
|
adapter->init_done_rc = 0;
|
rc = ibmvnic_send_crq_init(adapter);
|
if (rc) {
|
dev_err(dev, "Send crq init failed with error %d\n", rc);
|
return rc;
|
}
|
|
if (!wait_for_completion_timeout(&adapter->init_done, timeout)) {
|
dev_err(dev, "Initialization sequence timed out\n");
|
return -1;
|
}
|
|
if (adapter->init_done_rc) {
|
release_crq_queue(adapter);
|
return adapter->init_done_rc;
|
}
|
|
if (adapter->from_passive_init) {
|
adapter->state = VNIC_OPEN;
|
adapter->from_passive_init = false;
|
return -1;
|
}
|
|
if (reset &&
|
test_bit(0, &adapter->resetting) && !adapter->wait_for_reset &&
|
adapter->reset_reason != VNIC_RESET_MOBILITY) {
|
if (adapter->req_rx_queues != old_num_rx_queues ||
|
adapter->req_tx_queues != old_num_tx_queues) {
|
release_sub_crqs(adapter, 0);
|
rc = init_sub_crqs(adapter);
|
} else {
|
/* no need to reinitialize completely, but we do
|
* need to clean up transmits that were in flight
|
* when we processed the reset. Failure to do so
|
* will confound the upper layer, usually TCP, by
|
* creating the illusion of transmits that are
|
* awaiting completion.
|
*/
|
clean_tx_pools(adapter);
|
|
rc = reset_sub_crq_queues(adapter);
|
}
|
} else {
|
rc = init_sub_crqs(adapter);
|
}
|
|
if (rc) {
|
dev_err(dev, "Initialization of sub crqs failed\n");
|
release_crq_queue(adapter);
|
return rc;
|
}
|
|
rc = init_sub_crq_irqs(adapter);
|
if (rc) {
|
dev_err(dev, "Failed to initialize sub crq irqs\n");
|
release_crq_queue(adapter);
|
}
|
|
return rc;
|
}
|
|
static struct device_attribute dev_attr_failover;
|
|
static int ibmvnic_probe(struct vio_dev *dev, const struct vio_device_id *id)
|
{
|
struct ibmvnic_adapter *adapter;
|
struct net_device *netdev;
|
unsigned char *mac_addr_p;
|
int rc;
|
|
dev_dbg(&dev->dev, "entering ibmvnic_probe for UA 0x%x\n",
|
dev->unit_address);
|
|
mac_addr_p = (unsigned char *)vio_get_attribute(dev,
|
VETH_MAC_ADDR, NULL);
|
if (!mac_addr_p) {
|
dev_err(&dev->dev,
|
"(%s:%3.3d) ERROR: Can't find MAC_ADDR attribute\n",
|
__FILE__, __LINE__);
|
return 0;
|
}
|
|
netdev = alloc_etherdev_mq(sizeof(struct ibmvnic_adapter),
|
IBMVNIC_MAX_QUEUES);
|
if (!netdev)
|
return -ENOMEM;
|
|
adapter = netdev_priv(netdev);
|
adapter->state = VNIC_PROBING;
|
dev_set_drvdata(&dev->dev, netdev);
|
adapter->vdev = dev;
|
adapter->netdev = netdev;
|
adapter->login_pending = false;
|
|
ether_addr_copy(adapter->mac_addr, mac_addr_p);
|
ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
|
netdev->irq = dev->irq;
|
netdev->netdev_ops = &ibmvnic_netdev_ops;
|
netdev->ethtool_ops = &ibmvnic_ethtool_ops;
|
SET_NETDEV_DEV(netdev, &dev->dev);
|
|
spin_lock_init(&adapter->stats_lock);
|
|
INIT_WORK(&adapter->ibmvnic_reset, __ibmvnic_reset);
|
INIT_DELAYED_WORK(&adapter->ibmvnic_delayed_reset,
|
__ibmvnic_delayed_reset);
|
INIT_LIST_HEAD(&adapter->rwi_list);
|
spin_lock_init(&adapter->rwi_lock);
|
spin_lock_init(&adapter->state_lock);
|
mutex_init(&adapter->fw_lock);
|
init_completion(&adapter->init_done);
|
init_completion(&adapter->fw_done);
|
init_completion(&adapter->reset_done);
|
init_completion(&adapter->stats_done);
|
clear_bit(0, &adapter->resetting);
|
|
do {
|
rc = init_crq_queue(adapter);
|
if (rc) {
|
dev_err(&dev->dev, "Couldn't initialize crq. rc=%d\n",
|
rc);
|
goto ibmvnic_init_fail;
|
}
|
|
rc = ibmvnic_reset_init(adapter, false);
|
if (rc && rc != EAGAIN)
|
goto ibmvnic_init_fail;
|
} while (rc == EAGAIN);
|
|
rc = init_stats_buffers(adapter);
|
if (rc)
|
goto ibmvnic_init_fail;
|
|
rc = init_stats_token(adapter);
|
if (rc)
|
goto ibmvnic_stats_fail;
|
|
netdev->mtu = adapter->req_mtu - ETH_HLEN;
|
netdev->min_mtu = adapter->min_mtu - ETH_HLEN;
|
netdev->max_mtu = adapter->max_mtu - ETH_HLEN;
|
|
rc = device_create_file(&dev->dev, &dev_attr_failover);
|
if (rc)
|
goto ibmvnic_dev_file_err;
|
|
netif_carrier_off(netdev);
|
|
adapter->state = VNIC_PROBED;
|
|
adapter->wait_for_reset = false;
|
adapter->last_reset_time = jiffies;
|
|
rc = register_netdev(netdev);
|
if (rc) {
|
dev_err(&dev->dev, "failed to register netdev rc=%d\n", rc);
|
goto ibmvnic_register_fail;
|
}
|
dev_info(&dev->dev, "ibmvnic registered\n");
|
|
return 0;
|
|
ibmvnic_register_fail:
|
device_remove_file(&dev->dev, &dev_attr_failover);
|
|
ibmvnic_dev_file_err:
|
release_stats_token(adapter);
|
|
ibmvnic_stats_fail:
|
release_stats_buffers(adapter);
|
|
ibmvnic_init_fail:
|
release_sub_crqs(adapter, 1);
|
release_crq_queue(adapter);
|
mutex_destroy(&adapter->fw_lock);
|
free_netdev(netdev);
|
|
return rc;
|
}
|
|
static int ibmvnic_remove(struct vio_dev *dev)
|
{
|
struct net_device *netdev = dev_get_drvdata(&dev->dev);
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
unsigned long flags;
|
|
spin_lock_irqsave(&adapter->state_lock, flags);
|
|
/* If ibmvnic_reset() is scheduling a reset, wait for it to
|
* finish. Then, set the state to REMOVING to prevent it from
|
* scheduling any more work and to have reset functions ignore
|
* any resets that have already been scheduled. Drop the lock
|
* after setting state, so __ibmvnic_reset() which is called
|
* from the flush_work() below, can make progress.
|
*/
|
spin_lock(&adapter->rwi_lock);
|
adapter->state = VNIC_REMOVING;
|
spin_unlock(&adapter->rwi_lock);
|
|
spin_unlock_irqrestore(&adapter->state_lock, flags);
|
|
flush_work(&adapter->ibmvnic_reset);
|
flush_delayed_work(&adapter->ibmvnic_delayed_reset);
|
|
rtnl_lock();
|
unregister_netdevice(netdev);
|
|
release_resources(adapter);
|
release_sub_crqs(adapter, 1);
|
release_crq_queue(adapter);
|
|
release_stats_token(adapter);
|
release_stats_buffers(adapter);
|
|
adapter->state = VNIC_REMOVED;
|
|
rtnl_unlock();
|
mutex_destroy(&adapter->fw_lock);
|
device_remove_file(&dev->dev, &dev_attr_failover);
|
free_netdev(netdev);
|
dev_set_drvdata(&dev->dev, NULL);
|
|
return 0;
|
}
|
|
static ssize_t failover_store(struct device *dev, struct device_attribute *attr,
|
const char *buf, size_t count)
|
{
|
struct net_device *netdev = dev_get_drvdata(dev);
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
unsigned long retbuf[PLPAR_HCALL_BUFSIZE];
|
__be64 session_token;
|
long rc;
|
|
if (!sysfs_streq(buf, "1"))
|
return -EINVAL;
|
|
rc = plpar_hcall(H_VIOCTL, retbuf, adapter->vdev->unit_address,
|
H_GET_SESSION_TOKEN, 0, 0, 0);
|
if (rc) {
|
netdev_err(netdev, "Couldn't retrieve session token, rc %ld\n",
|
rc);
|
return -EINVAL;
|
}
|
|
session_token = (__be64)retbuf[0];
|
netdev_dbg(netdev, "Initiating client failover, session id %llx\n",
|
be64_to_cpu(session_token));
|
rc = plpar_hcall_norets(H_VIOCTL, adapter->vdev->unit_address,
|
H_SESSION_ERR_DETECTED, session_token, 0, 0);
|
if (rc) {
|
netdev_err(netdev, "Client initiated failover failed, rc %ld\n",
|
rc);
|
return -EINVAL;
|
}
|
|
return count;
|
}
|
|
static DEVICE_ATTR_WO(failover);
|
|
static unsigned long ibmvnic_get_desired_dma(struct vio_dev *vdev)
|
{
|
struct net_device *netdev = dev_get_drvdata(&vdev->dev);
|
struct ibmvnic_adapter *adapter;
|
struct iommu_table *tbl;
|
unsigned long ret = 0;
|
int i;
|
|
tbl = get_iommu_table_base(&vdev->dev);
|
|
/* netdev inits at probe time along with the structures we need below*/
|
if (!netdev)
|
return IOMMU_PAGE_ALIGN(IBMVNIC_IO_ENTITLEMENT_DEFAULT, tbl);
|
|
adapter = netdev_priv(netdev);
|
|
ret += PAGE_SIZE; /* the crq message queue */
|
ret += IOMMU_PAGE_ALIGN(sizeof(struct ibmvnic_statistics), tbl);
|
|
for (i = 0; i < adapter->req_tx_queues + adapter->req_rx_queues; i++)
|
ret += 4 * PAGE_SIZE; /* the scrq message queue */
|
|
for (i = 0; i < adapter->num_active_rx_pools; i++)
|
ret += adapter->rx_pool[i].size *
|
IOMMU_PAGE_ALIGN(adapter->rx_pool[i].buff_size, tbl);
|
|
return ret;
|
}
|
|
static int ibmvnic_resume(struct device *dev)
|
{
|
struct net_device *netdev = dev_get_drvdata(dev);
|
struct ibmvnic_adapter *adapter = netdev_priv(netdev);
|
|
if (adapter->state != VNIC_OPEN)
|
return 0;
|
|
tasklet_schedule(&adapter->tasklet);
|
|
return 0;
|
}
|
|
static const struct vio_device_id ibmvnic_device_table[] = {
|
{"network", "IBM,vnic"},
|
{"", "" }
|
};
|
MODULE_DEVICE_TABLE(vio, ibmvnic_device_table);
|
|
static const struct dev_pm_ops ibmvnic_pm_ops = {
|
.resume = ibmvnic_resume
|
};
|
|
static struct vio_driver ibmvnic_driver = {
|
.id_table = ibmvnic_device_table,
|
.probe = ibmvnic_probe,
|
.remove = ibmvnic_remove,
|
.get_desired_dma = ibmvnic_get_desired_dma,
|
.name = ibmvnic_driver_name,
|
.pm = &ibmvnic_pm_ops,
|
};
|
|
/* module functions */
|
static int __init ibmvnic_module_init(void)
|
{
|
pr_info("%s: %s %s\n", ibmvnic_driver_name, ibmvnic_driver_string,
|
IBMVNIC_DRIVER_VERSION);
|
|
return vio_register_driver(&ibmvnic_driver);
|
}
|
|
static void __exit ibmvnic_module_exit(void)
|
{
|
vio_unregister_driver(&ibmvnic_driver);
|
}
|
|
module_init(ibmvnic_module_init);
|
module_exit(ibmvnic_module_exit);
|
