// SPDX-License-Identifier: GPL-2.0-or-later
|
/*
|
* linux/drivers/net/ethernet/ibm/ehea/ehea_qmr.c
|
*
|
* eHEA ethernet device driver for IBM eServer System p
|
*
|
* (C) Copyright IBM Corp. 2006
|
*
|
* Authors:
|
* Christoph Raisch <raisch@de.ibm.com>
|
* Jan-Bernd Themann <themann@de.ibm.com>
|
* Thomas Klein <tklein@de.ibm.com>
|
*/
|
|
#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
|
|
#include <linux/mm.h>
|
#include <linux/slab.h>
|
#include "ehea.h"
|
#include "ehea_phyp.h"
|
#include "ehea_qmr.h"
|
|
static struct ehea_bmap *ehea_bmap;
|
|
static void *hw_qpageit_get_inc(struct hw_queue *queue)
|
{
|
void *retvalue = hw_qeit_get(queue);
|
|
queue->current_q_offset += queue->pagesize;
|
if (queue->current_q_offset > queue->queue_length) {
|
queue->current_q_offset -= queue->pagesize;
|
retvalue = NULL;
|
} else if (((u64) retvalue) & (EHEA_PAGESIZE-1)) {
|
pr_err("not on pageboundary\n");
|
retvalue = NULL;
|
}
|
return retvalue;
|
}
|
|
static int hw_queue_ctor(struct hw_queue *queue, const u32 nr_of_pages,
|
const u32 pagesize, const u32 qe_size)
|
{
|
int pages_per_kpage = PAGE_SIZE / pagesize;
|
int i, k;
|
|
if ((pagesize > PAGE_SIZE) || (!pages_per_kpage)) {
|
pr_err("pagesize conflict! kernel pagesize=%d, ehea pagesize=%d\n",
|
(int)PAGE_SIZE, (int)pagesize);
|
return -EINVAL;
|
}
|
|
queue->queue_length = nr_of_pages * pagesize;
|
queue->queue_pages = kmalloc_array(nr_of_pages, sizeof(void *),
|
GFP_KERNEL);
|
if (!queue->queue_pages)
|
return -ENOMEM;
|
|
/*
|
* allocate pages for queue:
|
* outer loop allocates whole kernel pages (page aligned) and
|
* inner loop divides a kernel page into smaller hea queue pages
|
*/
|
i = 0;
|
while (i < nr_of_pages) {
|
u8 *kpage = (u8 *)get_zeroed_page(GFP_KERNEL);
|
if (!kpage)
|
goto out_nomem;
|
for (k = 0; k < pages_per_kpage && i < nr_of_pages; k++) {
|
(queue->queue_pages)[i] = (struct ehea_page *)kpage;
|
kpage += pagesize;
|
i++;
|
}
|
}
|
|
queue->current_q_offset = 0;
|
queue->qe_size = qe_size;
|
queue->pagesize = pagesize;
|
queue->toggle_state = 1;
|
|
return 0;
|
out_nomem:
|
for (i = 0; i < nr_of_pages; i += pages_per_kpage) {
|
if (!(queue->queue_pages)[i])
|
break;
|
free_page((unsigned long)(queue->queue_pages)[i]);
|
}
|
return -ENOMEM;
|
}
|
|
static void hw_queue_dtor(struct hw_queue *queue)
|
{
|
int pages_per_kpage;
|
int i, nr_pages;
|
|
if (!queue || !queue->queue_pages)
|
return;
|
|
pages_per_kpage = PAGE_SIZE / queue->pagesize;
|
|
nr_pages = queue->queue_length / queue->pagesize;
|
|
for (i = 0; i < nr_pages; i += pages_per_kpage)
|
free_page((unsigned long)(queue->queue_pages)[i]);
|
|
kfree(queue->queue_pages);
|
}
|
|
struct ehea_cq *ehea_create_cq(struct ehea_adapter *adapter,
|
int nr_of_cqe, u64 eq_handle, u32 cq_token)
|
{
|
struct ehea_cq *cq;
|
u64 hret, rpage;
|
u32 counter;
|
int ret;
|
void *vpage;
|
|
cq = kzalloc(sizeof(*cq), GFP_KERNEL);
|
if (!cq)
|
goto out_nomem;
|
|
cq->attr.max_nr_of_cqes = nr_of_cqe;
|
cq->attr.cq_token = cq_token;
|
cq->attr.eq_handle = eq_handle;
|
|
cq->adapter = adapter;
|
|
hret = ehea_h_alloc_resource_cq(adapter->handle, &cq->attr,
|
&cq->fw_handle, &cq->epas);
|
if (hret != H_SUCCESS) {
|
pr_err("alloc_resource_cq failed\n");
|
goto out_freemem;
|
}
|
|
ret = hw_queue_ctor(&cq->hw_queue, cq->attr.nr_pages,
|
EHEA_PAGESIZE, sizeof(struct ehea_cqe));
|
if (ret)
|
goto out_freeres;
|
|
for (counter = 0; counter < cq->attr.nr_pages; counter++) {
|
vpage = hw_qpageit_get_inc(&cq->hw_queue);
|
if (!vpage) {
|
pr_err("hw_qpageit_get_inc failed\n");
|
goto out_kill_hwq;
|
}
|
|
rpage = __pa(vpage);
|
hret = ehea_h_register_rpage(adapter->handle,
|
0, EHEA_CQ_REGISTER_ORIG,
|
cq->fw_handle, rpage, 1);
|
if (hret < H_SUCCESS) {
|
pr_err("register_rpage_cq failed ehea_cq=%p hret=%llx counter=%i act_pages=%i\n",
|
cq, hret, counter, cq->attr.nr_pages);
|
goto out_kill_hwq;
|
}
|
|
if (counter == (cq->attr.nr_pages - 1)) {
|
vpage = hw_qpageit_get_inc(&cq->hw_queue);
|
|
if ((hret != H_SUCCESS) || (vpage)) {
|
pr_err("registration of pages not complete hret=%llx\n",
|
hret);
|
goto out_kill_hwq;
|
}
|
} else {
|
if (hret != H_PAGE_REGISTERED) {
|
pr_err("CQ: registration of page failed hret=%llx\n",
|
hret);
|
goto out_kill_hwq;
|
}
|
}
|
}
|
|
hw_qeit_reset(&cq->hw_queue);
|
ehea_reset_cq_ep(cq);
|
ehea_reset_cq_n1(cq);
|
|
return cq;
|
|
out_kill_hwq:
|
hw_queue_dtor(&cq->hw_queue);
|
|
out_freeres:
|
ehea_h_free_resource(adapter->handle, cq->fw_handle, FORCE_FREE);
|
|
out_freemem:
|
kfree(cq);
|
|
out_nomem:
|
return NULL;
|
}
|
|
static u64 ehea_destroy_cq_res(struct ehea_cq *cq, u64 force)
|
{
|
u64 hret;
|
u64 adapter_handle = cq->adapter->handle;
|
|
/* deregister all previous registered pages */
|
hret = ehea_h_free_resource(adapter_handle, cq->fw_handle, force);
|
if (hret != H_SUCCESS)
|
return hret;
|
|
hw_queue_dtor(&cq->hw_queue);
|
kfree(cq);
|
|
return hret;
|
}
|
|
int ehea_destroy_cq(struct ehea_cq *cq)
|
{
|
u64 hret, aer, aerr;
|
if (!cq)
|
return 0;
|
|
hcp_epas_dtor(&cq->epas);
|
hret = ehea_destroy_cq_res(cq, NORMAL_FREE);
|
if (hret == H_R_STATE) {
|
ehea_error_data(cq->adapter, cq->fw_handle, &aer, &aerr);
|
hret = ehea_destroy_cq_res(cq, FORCE_FREE);
|
}
|
|
if (hret != H_SUCCESS) {
|
pr_err("destroy CQ failed\n");
|
return -EIO;
|
}
|
|
return 0;
|
}
|
|
struct ehea_eq *ehea_create_eq(struct ehea_adapter *adapter,
|
const enum ehea_eq_type type,
|
const u32 max_nr_of_eqes, const u8 eqe_gen)
|
{
|
int ret, i;
|
u64 hret, rpage;
|
void *vpage;
|
struct ehea_eq *eq;
|
|
eq = kzalloc(sizeof(*eq), GFP_KERNEL);
|
if (!eq)
|
return NULL;
|
|
eq->adapter = adapter;
|
eq->attr.type = type;
|
eq->attr.max_nr_of_eqes = max_nr_of_eqes;
|
eq->attr.eqe_gen = eqe_gen;
|
spin_lock_init(&eq->spinlock);
|
|
hret = ehea_h_alloc_resource_eq(adapter->handle,
|
&eq->attr, &eq->fw_handle);
|
if (hret != H_SUCCESS) {
|
pr_err("alloc_resource_eq failed\n");
|
goto out_freemem;
|
}
|
|
ret = hw_queue_ctor(&eq->hw_queue, eq->attr.nr_pages,
|
EHEA_PAGESIZE, sizeof(struct ehea_eqe));
|
if (ret) {
|
pr_err("can't allocate eq pages\n");
|
goto out_freeres;
|
}
|
|
for (i = 0; i < eq->attr.nr_pages; i++) {
|
vpage = hw_qpageit_get_inc(&eq->hw_queue);
|
if (!vpage) {
|
pr_err("hw_qpageit_get_inc failed\n");
|
hret = H_RESOURCE;
|
goto out_kill_hwq;
|
}
|
|
rpage = __pa(vpage);
|
|
hret = ehea_h_register_rpage(adapter->handle, 0,
|
EHEA_EQ_REGISTER_ORIG,
|
eq->fw_handle, rpage, 1);
|
|
if (i == (eq->attr.nr_pages - 1)) {
|
/* last page */
|
vpage = hw_qpageit_get_inc(&eq->hw_queue);
|
if ((hret != H_SUCCESS) || (vpage))
|
goto out_kill_hwq;
|
|
} else {
|
if (hret != H_PAGE_REGISTERED)
|
goto out_kill_hwq;
|
|
}
|
}
|
|
hw_qeit_reset(&eq->hw_queue);
|
return eq;
|
|
out_kill_hwq:
|
hw_queue_dtor(&eq->hw_queue);
|
|
out_freeres:
|
ehea_h_free_resource(adapter->handle, eq->fw_handle, FORCE_FREE);
|
|
out_freemem:
|
kfree(eq);
|
return NULL;
|
}
|
|
struct ehea_eqe *ehea_poll_eq(struct ehea_eq *eq)
|
{
|
struct ehea_eqe *eqe;
|
unsigned long flags;
|
|
spin_lock_irqsave(&eq->spinlock, flags);
|
eqe = hw_eqit_eq_get_inc_valid(&eq->hw_queue);
|
spin_unlock_irqrestore(&eq->spinlock, flags);
|
|
return eqe;
|
}
|
|
static u64 ehea_destroy_eq_res(struct ehea_eq *eq, u64 force)
|
{
|
u64 hret;
|
unsigned long flags;
|
|
spin_lock_irqsave(&eq->spinlock, flags);
|
|
hret = ehea_h_free_resource(eq->adapter->handle, eq->fw_handle, force);
|
spin_unlock_irqrestore(&eq->spinlock, flags);
|
|
if (hret != H_SUCCESS)
|
return hret;
|
|
hw_queue_dtor(&eq->hw_queue);
|
kfree(eq);
|
|
return hret;
|
}
|
|
int ehea_destroy_eq(struct ehea_eq *eq)
|
{
|
u64 hret, aer, aerr;
|
if (!eq)
|
return 0;
|
|
hcp_epas_dtor(&eq->epas);
|
|
hret = ehea_destroy_eq_res(eq, NORMAL_FREE);
|
if (hret == H_R_STATE) {
|
ehea_error_data(eq->adapter, eq->fw_handle, &aer, &aerr);
|
hret = ehea_destroy_eq_res(eq, FORCE_FREE);
|
}
|
|
if (hret != H_SUCCESS) {
|
pr_err("destroy EQ failed\n");
|
return -EIO;
|
}
|
|
return 0;
|
}
|
|
/* allocates memory for a queue and registers pages in phyp */
|
static int ehea_qp_alloc_register(struct ehea_qp *qp, struct hw_queue *hw_queue,
|
int nr_pages, int wqe_size, int act_nr_sges,
|
struct ehea_adapter *adapter, int h_call_q_selector)
|
{
|
u64 hret, rpage;
|
int ret, cnt;
|
void *vpage;
|
|
ret = hw_queue_ctor(hw_queue, nr_pages, EHEA_PAGESIZE, wqe_size);
|
if (ret)
|
return ret;
|
|
for (cnt = 0; cnt < nr_pages; cnt++) {
|
vpage = hw_qpageit_get_inc(hw_queue);
|
if (!vpage) {
|
pr_err("hw_qpageit_get_inc failed\n");
|
goto out_kill_hwq;
|
}
|
rpage = __pa(vpage);
|
hret = ehea_h_register_rpage(adapter->handle,
|
0, h_call_q_selector,
|
qp->fw_handle, rpage, 1);
|
if (hret < H_SUCCESS) {
|
pr_err("register_rpage_qp failed\n");
|
goto out_kill_hwq;
|
}
|
}
|
hw_qeit_reset(hw_queue);
|
return 0;
|
|
out_kill_hwq:
|
hw_queue_dtor(hw_queue);
|
return -EIO;
|
}
|
|
static inline u32 map_wqe_size(u8 wqe_enc_size)
|
{
|
return 128 << wqe_enc_size;
|
}
|
|
struct ehea_qp *ehea_create_qp(struct ehea_adapter *adapter,
|
u32 pd, struct ehea_qp_init_attr *init_attr)
|
{
|
int ret;
|
u64 hret;
|
struct ehea_qp *qp;
|
u32 wqe_size_in_bytes_sq, wqe_size_in_bytes_rq1;
|
u32 wqe_size_in_bytes_rq2, wqe_size_in_bytes_rq3;
|
|
|
qp = kzalloc(sizeof(*qp), GFP_KERNEL);
|
if (!qp)
|
return NULL;
|
|
qp->adapter = adapter;
|
|
hret = ehea_h_alloc_resource_qp(adapter->handle, init_attr, pd,
|
&qp->fw_handle, &qp->epas);
|
if (hret != H_SUCCESS) {
|
pr_err("ehea_h_alloc_resource_qp failed\n");
|
goto out_freemem;
|
}
|
|
wqe_size_in_bytes_sq = map_wqe_size(init_attr->act_wqe_size_enc_sq);
|
wqe_size_in_bytes_rq1 = map_wqe_size(init_attr->act_wqe_size_enc_rq1);
|
wqe_size_in_bytes_rq2 = map_wqe_size(init_attr->act_wqe_size_enc_rq2);
|
wqe_size_in_bytes_rq3 = map_wqe_size(init_attr->act_wqe_size_enc_rq3);
|
|
ret = ehea_qp_alloc_register(qp, &qp->hw_squeue, init_attr->nr_sq_pages,
|
wqe_size_in_bytes_sq,
|
init_attr->act_wqe_size_enc_sq, adapter,
|
0);
|
if (ret) {
|
pr_err("can't register for sq ret=%x\n", ret);
|
goto out_freeres;
|
}
|
|
ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue1,
|
init_attr->nr_rq1_pages,
|
wqe_size_in_bytes_rq1,
|
init_attr->act_wqe_size_enc_rq1,
|
adapter, 1);
|
if (ret) {
|
pr_err("can't register for rq1 ret=%x\n", ret);
|
goto out_kill_hwsq;
|
}
|
|
if (init_attr->rq_count > 1) {
|
ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue2,
|
init_attr->nr_rq2_pages,
|
wqe_size_in_bytes_rq2,
|
init_attr->act_wqe_size_enc_rq2,
|
adapter, 2);
|
if (ret) {
|
pr_err("can't register for rq2 ret=%x\n", ret);
|
goto out_kill_hwr1q;
|
}
|
}
|
|
if (init_attr->rq_count > 2) {
|
ret = ehea_qp_alloc_register(qp, &qp->hw_rqueue3,
|
init_attr->nr_rq3_pages,
|
wqe_size_in_bytes_rq3,
|
init_attr->act_wqe_size_enc_rq3,
|
adapter, 3);
|
if (ret) {
|
pr_err("can't register for rq3 ret=%x\n", ret);
|
goto out_kill_hwr2q;
|
}
|
}
|
|
qp->init_attr = *init_attr;
|
|
return qp;
|
|
out_kill_hwr2q:
|
hw_queue_dtor(&qp->hw_rqueue2);
|
|
out_kill_hwr1q:
|
hw_queue_dtor(&qp->hw_rqueue1);
|
|
out_kill_hwsq:
|
hw_queue_dtor(&qp->hw_squeue);
|
|
out_freeres:
|
ehea_h_disable_and_get_hea(adapter->handle, qp->fw_handle);
|
ehea_h_free_resource(adapter->handle, qp->fw_handle, FORCE_FREE);
|
|
out_freemem:
|
kfree(qp);
|
return NULL;
|
}
|
|
static u64 ehea_destroy_qp_res(struct ehea_qp *qp, u64 force)
|
{
|
u64 hret;
|
struct ehea_qp_init_attr *qp_attr = &qp->init_attr;
|
|
|
ehea_h_disable_and_get_hea(qp->adapter->handle, qp->fw_handle);
|
hret = ehea_h_free_resource(qp->adapter->handle, qp->fw_handle, force);
|
if (hret != H_SUCCESS)
|
return hret;
|
|
hw_queue_dtor(&qp->hw_squeue);
|
hw_queue_dtor(&qp->hw_rqueue1);
|
|
if (qp_attr->rq_count > 1)
|
hw_queue_dtor(&qp->hw_rqueue2);
|
if (qp_attr->rq_count > 2)
|
hw_queue_dtor(&qp->hw_rqueue3);
|
kfree(qp);
|
|
return hret;
|
}
|
|
int ehea_destroy_qp(struct ehea_qp *qp)
|
{
|
u64 hret, aer, aerr;
|
if (!qp)
|
return 0;
|
|
hcp_epas_dtor(&qp->epas);
|
|
hret = ehea_destroy_qp_res(qp, NORMAL_FREE);
|
if (hret == H_R_STATE) {
|
ehea_error_data(qp->adapter, qp->fw_handle, &aer, &aerr);
|
hret = ehea_destroy_qp_res(qp, FORCE_FREE);
|
}
|
|
if (hret != H_SUCCESS) {
|
pr_err("destroy QP failed\n");
|
return -EIO;
|
}
|
|
return 0;
|
}
|
|
static inline int ehea_calc_index(unsigned long i, unsigned long s)
|
{
|
return (i >> s) & EHEA_INDEX_MASK;
|
}
|
|
static inline int ehea_init_top_bmap(struct ehea_top_bmap *ehea_top_bmap,
|
int dir)
|
{
|
if (!ehea_top_bmap->dir[dir]) {
|
ehea_top_bmap->dir[dir] =
|
kzalloc(sizeof(struct ehea_dir_bmap), GFP_KERNEL);
|
if (!ehea_top_bmap->dir[dir])
|
return -ENOMEM;
|
}
|
return 0;
|
}
|
|
static inline int ehea_init_bmap(struct ehea_bmap *ehea_bmap, int top, int dir)
|
{
|
if (!ehea_bmap->top[top]) {
|
ehea_bmap->top[top] =
|
kzalloc(sizeof(struct ehea_top_bmap), GFP_KERNEL);
|
if (!ehea_bmap->top[top])
|
return -ENOMEM;
|
}
|
return ehea_init_top_bmap(ehea_bmap->top[top], dir);
|
}
|
|
static DEFINE_MUTEX(ehea_busmap_mutex);
|
static unsigned long ehea_mr_len;
|
|
#define EHEA_BUSMAP_ADD_SECT 1
|
#define EHEA_BUSMAP_REM_SECT 0
|
|
static void ehea_rebuild_busmap(void)
|
{
|
u64 vaddr = EHEA_BUSMAP_START;
|
int top, dir, idx;
|
|
for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
|
struct ehea_top_bmap *ehea_top;
|
int valid_dir_entries = 0;
|
|
if (!ehea_bmap->top[top])
|
continue;
|
ehea_top = ehea_bmap->top[top];
|
for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
|
struct ehea_dir_bmap *ehea_dir;
|
int valid_entries = 0;
|
|
if (!ehea_top->dir[dir])
|
continue;
|
valid_dir_entries++;
|
ehea_dir = ehea_top->dir[dir];
|
for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
|
if (!ehea_dir->ent[idx])
|
continue;
|
valid_entries++;
|
ehea_dir->ent[idx] = vaddr;
|
vaddr += EHEA_SECTSIZE;
|
}
|
if (!valid_entries) {
|
ehea_top->dir[dir] = NULL;
|
kfree(ehea_dir);
|
}
|
}
|
if (!valid_dir_entries) {
|
ehea_bmap->top[top] = NULL;
|
kfree(ehea_top);
|
}
|
}
|
}
|
|
static int ehea_update_busmap(unsigned long pfn, unsigned long nr_pages, int add)
|
{
|
unsigned long i, start_section, end_section;
|
|
if (!nr_pages)
|
return 0;
|
|
if (!ehea_bmap) {
|
ehea_bmap = kzalloc(sizeof(struct ehea_bmap), GFP_KERNEL);
|
if (!ehea_bmap)
|
return -ENOMEM;
|
}
|
|
start_section = (pfn * PAGE_SIZE) / EHEA_SECTSIZE;
|
end_section = start_section + ((nr_pages * PAGE_SIZE) / EHEA_SECTSIZE);
|
/* Mark entries as valid or invalid only; address is assigned later */
|
for (i = start_section; i < end_section; i++) {
|
u64 flag;
|
int top = ehea_calc_index(i, EHEA_TOP_INDEX_SHIFT);
|
int dir = ehea_calc_index(i, EHEA_DIR_INDEX_SHIFT);
|
int idx = i & EHEA_INDEX_MASK;
|
|
if (add) {
|
int ret = ehea_init_bmap(ehea_bmap, top, dir);
|
if (ret)
|
return ret;
|
flag = 1; /* valid */
|
ehea_mr_len += EHEA_SECTSIZE;
|
} else {
|
if (!ehea_bmap->top[top])
|
continue;
|
if (!ehea_bmap->top[top]->dir[dir])
|
continue;
|
flag = 0; /* invalid */
|
ehea_mr_len -= EHEA_SECTSIZE;
|
}
|
|
ehea_bmap->top[top]->dir[dir]->ent[idx] = flag;
|
}
|
ehea_rebuild_busmap(); /* Assign contiguous addresses for mr */
|
return 0;
|
}
|
|
int ehea_add_sect_bmap(unsigned long pfn, unsigned long nr_pages)
|
{
|
int ret;
|
|
mutex_lock(&ehea_busmap_mutex);
|
ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
|
mutex_unlock(&ehea_busmap_mutex);
|
return ret;
|
}
|
|
int ehea_rem_sect_bmap(unsigned long pfn, unsigned long nr_pages)
|
{
|
int ret;
|
|
mutex_lock(&ehea_busmap_mutex);
|
ret = ehea_update_busmap(pfn, nr_pages, EHEA_BUSMAP_REM_SECT);
|
mutex_unlock(&ehea_busmap_mutex);
|
return ret;
|
}
|
|
static int ehea_is_hugepage(unsigned long pfn)
|
{
|
if (pfn & EHEA_HUGEPAGE_PFN_MASK)
|
return 0;
|
|
if (page_shift(pfn_to_page(pfn)) != EHEA_HUGEPAGESHIFT)
|
return 0;
|
|
return 1;
|
}
|
|
static int ehea_create_busmap_callback(unsigned long initial_pfn,
|
unsigned long total_nr_pages, void *arg)
|
{
|
int ret;
|
unsigned long pfn, start_pfn, end_pfn, nr_pages;
|
|
if ((total_nr_pages * PAGE_SIZE) < EHEA_HUGEPAGE_SIZE)
|
return ehea_update_busmap(initial_pfn, total_nr_pages,
|
EHEA_BUSMAP_ADD_SECT);
|
|
/* Given chunk is >= 16GB -> check for hugepages */
|
start_pfn = initial_pfn;
|
end_pfn = initial_pfn + total_nr_pages;
|
pfn = start_pfn;
|
|
while (pfn < end_pfn) {
|
if (ehea_is_hugepage(pfn)) {
|
/* Add mem found in front of the hugepage */
|
nr_pages = pfn - start_pfn;
|
ret = ehea_update_busmap(start_pfn, nr_pages,
|
EHEA_BUSMAP_ADD_SECT);
|
if (ret)
|
return ret;
|
|
/* Skip the hugepage */
|
pfn += (EHEA_HUGEPAGE_SIZE / PAGE_SIZE);
|
start_pfn = pfn;
|
} else
|
pfn += (EHEA_SECTSIZE / PAGE_SIZE);
|
}
|
|
/* Add mem found behind the hugepage(s) */
|
nr_pages = pfn - start_pfn;
|
return ehea_update_busmap(start_pfn, nr_pages, EHEA_BUSMAP_ADD_SECT);
|
}
|
|
int ehea_create_busmap(void)
|
{
|
int ret;
|
|
mutex_lock(&ehea_busmap_mutex);
|
ehea_mr_len = 0;
|
ret = walk_system_ram_range(0, 1ULL << MAX_PHYSMEM_BITS, NULL,
|
ehea_create_busmap_callback);
|
mutex_unlock(&ehea_busmap_mutex);
|
return ret;
|
}
|
|
void ehea_destroy_busmap(void)
|
{
|
int top, dir;
|
mutex_lock(&ehea_busmap_mutex);
|
if (!ehea_bmap)
|
goto out_destroy;
|
|
for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
|
if (!ehea_bmap->top[top])
|
continue;
|
|
for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
|
if (!ehea_bmap->top[top]->dir[dir])
|
continue;
|
|
kfree(ehea_bmap->top[top]->dir[dir]);
|
}
|
|
kfree(ehea_bmap->top[top]);
|
}
|
|
kfree(ehea_bmap);
|
ehea_bmap = NULL;
|
out_destroy:
|
mutex_unlock(&ehea_busmap_mutex);
|
}
|
|
u64 ehea_map_vaddr(void *caddr)
|
{
|
int top, dir, idx;
|
unsigned long index, offset;
|
|
if (!ehea_bmap)
|
return EHEA_INVAL_ADDR;
|
|
index = __pa(caddr) >> SECTION_SIZE_BITS;
|
top = (index >> EHEA_TOP_INDEX_SHIFT) & EHEA_INDEX_MASK;
|
if (!ehea_bmap->top[top])
|
return EHEA_INVAL_ADDR;
|
|
dir = (index >> EHEA_DIR_INDEX_SHIFT) & EHEA_INDEX_MASK;
|
if (!ehea_bmap->top[top]->dir[dir])
|
return EHEA_INVAL_ADDR;
|
|
idx = index & EHEA_INDEX_MASK;
|
if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
|
return EHEA_INVAL_ADDR;
|
|
offset = (unsigned long)caddr & (EHEA_SECTSIZE - 1);
|
return ehea_bmap->top[top]->dir[dir]->ent[idx] | offset;
|
}
|
|
static inline void *ehea_calc_sectbase(int top, int dir, int idx)
|
{
|
unsigned long ret = idx;
|
ret |= dir << EHEA_DIR_INDEX_SHIFT;
|
ret |= top << EHEA_TOP_INDEX_SHIFT;
|
return __va(ret << SECTION_SIZE_BITS);
|
}
|
|
static u64 ehea_reg_mr_section(int top, int dir, int idx, u64 *pt,
|
struct ehea_adapter *adapter,
|
struct ehea_mr *mr)
|
{
|
void *pg;
|
u64 j, m, hret;
|
unsigned long k = 0;
|
u64 pt_abs = __pa(pt);
|
|
void *sectbase = ehea_calc_sectbase(top, dir, idx);
|
|
for (j = 0; j < (EHEA_PAGES_PER_SECTION / EHEA_MAX_RPAGE); j++) {
|
|
for (m = 0; m < EHEA_MAX_RPAGE; m++) {
|
pg = sectbase + ((k++) * EHEA_PAGESIZE);
|
pt[m] = __pa(pg);
|
}
|
hret = ehea_h_register_rpage_mr(adapter->handle, mr->handle, 0,
|
0, pt_abs, EHEA_MAX_RPAGE);
|
|
if ((hret != H_SUCCESS) &&
|
(hret != H_PAGE_REGISTERED)) {
|
ehea_h_free_resource(adapter->handle, mr->handle,
|
FORCE_FREE);
|
pr_err("register_rpage_mr failed\n");
|
return hret;
|
}
|
}
|
return hret;
|
}
|
|
static u64 ehea_reg_mr_sections(int top, int dir, u64 *pt,
|
struct ehea_adapter *adapter,
|
struct ehea_mr *mr)
|
{
|
u64 hret = H_SUCCESS;
|
int idx;
|
|
for (idx = 0; idx < EHEA_MAP_ENTRIES; idx++) {
|
if (!ehea_bmap->top[top]->dir[dir]->ent[idx])
|
continue;
|
|
hret = ehea_reg_mr_section(top, dir, idx, pt, adapter, mr);
|
if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
|
return hret;
|
}
|
return hret;
|
}
|
|
static u64 ehea_reg_mr_dir_sections(int top, u64 *pt,
|
struct ehea_adapter *adapter,
|
struct ehea_mr *mr)
|
{
|
u64 hret = H_SUCCESS;
|
int dir;
|
|
for (dir = 0; dir < EHEA_MAP_ENTRIES; dir++) {
|
if (!ehea_bmap->top[top]->dir[dir])
|
continue;
|
|
hret = ehea_reg_mr_sections(top, dir, pt, adapter, mr);
|
if ((hret != H_SUCCESS) && (hret != H_PAGE_REGISTERED))
|
return hret;
|
}
|
return hret;
|
}
|
|
int ehea_reg_kernel_mr(struct ehea_adapter *adapter, struct ehea_mr *mr)
|
{
|
int ret;
|
u64 *pt;
|
u64 hret;
|
u32 acc_ctrl = EHEA_MR_ACC_CTRL;
|
|
unsigned long top;
|
|
pt = (void *)get_zeroed_page(GFP_KERNEL);
|
if (!pt) {
|
pr_err("no mem\n");
|
ret = -ENOMEM;
|
goto out;
|
}
|
|
hret = ehea_h_alloc_resource_mr(adapter->handle, EHEA_BUSMAP_START,
|
ehea_mr_len, acc_ctrl, adapter->pd,
|
&mr->handle, &mr->lkey);
|
|
if (hret != H_SUCCESS) {
|
pr_err("alloc_resource_mr failed\n");
|
ret = -EIO;
|
goto out;
|
}
|
|
if (!ehea_bmap) {
|
ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
|
pr_err("no busmap available\n");
|
ret = -EIO;
|
goto out;
|
}
|
|
for (top = 0; top < EHEA_MAP_ENTRIES; top++) {
|
if (!ehea_bmap->top[top])
|
continue;
|
|
hret = ehea_reg_mr_dir_sections(top, pt, adapter, mr);
|
if((hret != H_PAGE_REGISTERED) && (hret != H_SUCCESS))
|
break;
|
}
|
|
if (hret != H_SUCCESS) {
|
ehea_h_free_resource(adapter->handle, mr->handle, FORCE_FREE);
|
pr_err("registering mr failed\n");
|
ret = -EIO;
|
goto out;
|
}
|
|
mr->vaddr = EHEA_BUSMAP_START;
|
mr->adapter = adapter;
|
ret = 0;
|
out:
|
free_page((unsigned long)pt);
|
return ret;
|
}
|
|
int ehea_rem_mr(struct ehea_mr *mr)
|
{
|
u64 hret;
|
|
if (!mr || !mr->adapter)
|
return -EINVAL;
|
|
hret = ehea_h_free_resource(mr->adapter->handle, mr->handle,
|
FORCE_FREE);
|
if (hret != H_SUCCESS) {
|
pr_err("destroy MR failed\n");
|
return -EIO;
|
}
|
|
return 0;
|
}
|
|
int ehea_gen_smr(struct ehea_adapter *adapter, struct ehea_mr *old_mr,
|
struct ehea_mr *shared_mr)
|
{
|
u64 hret;
|
|
hret = ehea_h_register_smr(adapter->handle, old_mr->handle,
|
old_mr->vaddr, EHEA_MR_ACC_CTRL,
|
adapter->pd, shared_mr);
|
if (hret != H_SUCCESS)
|
return -EIO;
|
|
shared_mr->adapter = adapter;
|
|
return 0;
|
}
|
|
static void print_error_data(u64 *data)
|
{
|
int length;
|
u64 type = EHEA_BMASK_GET(ERROR_DATA_TYPE, data[2]);
|
u64 resource = data[1];
|
|
length = EHEA_BMASK_GET(ERROR_DATA_LENGTH, data[0]);
|
|
if (length > EHEA_PAGESIZE)
|
length = EHEA_PAGESIZE;
|
|
if (type == EHEA_AER_RESTYPE_QP)
|
pr_err("QP (resource=%llX) state: AER=0x%llX, AERR=0x%llX, port=%llX\n",
|
resource, data[6], data[12], data[22]);
|
else if (type == EHEA_AER_RESTYPE_CQ)
|
pr_err("CQ (resource=%llX) state: AER=0x%llX\n",
|
resource, data[6]);
|
else if (type == EHEA_AER_RESTYPE_EQ)
|
pr_err("EQ (resource=%llX) state: AER=0x%llX\n",
|
resource, data[6]);
|
|
ehea_dump(data, length, "error data");
|
}
|
|
u64 ehea_error_data(struct ehea_adapter *adapter, u64 res_handle,
|
u64 *aer, u64 *aerr)
|
{
|
unsigned long ret;
|
u64 *rblock;
|
u64 type = 0;
|
|
rblock = (void *)get_zeroed_page(GFP_KERNEL);
|
if (!rblock) {
|
pr_err("Cannot allocate rblock memory\n");
|
goto out;
|
}
|
|
ret = ehea_h_error_data(adapter->handle, res_handle, rblock);
|
|
if (ret == H_SUCCESS) {
|
type = EHEA_BMASK_GET(ERROR_DATA_TYPE, rblock[2]);
|
*aer = rblock[6];
|
*aerr = rblock[12];
|
print_error_data(rblock);
|
} else if (ret == H_R_STATE) {
|
pr_err("No error data available: %llX\n", res_handle);
|
} else
|
pr_err("Error data could not be fetched: %llX\n", res_handle);
|
|
free_page((unsigned long)rblock);
|
out:
|
return type;
|
}
|
