/*
|
* Copyright (C) 2015-2017 Netronome Systems, Inc.
|
*
|
* This software is dual licensed under the GNU General License Version 2,
|
* June 1991 as shown in the file COPYING in the top-level directory of this
|
* source tree or the BSD 2-Clause License provided below. You have the
|
* option to license this software under the complete terms of either license.
|
*
|
* The BSD 2-Clause License:
|
*
|
* Redistribution and use in source and binary forms, with or
|
* without modification, are permitted provided that the following
|
* conditions are met:
|
*
|
* 1. Redistributions of source code must retain the above
|
* copyright notice, this list of conditions and the following
|
* disclaimer.
|
*
|
* 2. Redistributions in binary form must reproduce the above
|
* copyright notice, this list of conditions and the following
|
* disclaimer in the documentation and/or other materials
|
* provided with the distribution.
|
*
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
|
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
|
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
|
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
* SOFTWARE.
|
*/
|
|
/*
|
* nfp_nsp.c
|
* Author: Jakub Kicinski <jakub.kicinski@netronome.com>
|
* Jason McMullan <jason.mcmullan@netronome.com>
|
*/
|
|
#include <linux/bitfield.h>
|
#include <linux/delay.h>
|
#include <linux/firmware.h>
|
#include <linux/kernel.h>
|
#include <linux/kthread.h>
|
#include <linux/sizes.h>
|
#include <linux/slab.h>
|
|
#define NFP_SUBSYS "nfp_nsp"
|
|
#include "nfp.h"
|
#include "nfp_cpp.h"
|
#include "nfp_nsp.h"
|
|
#define NFP_NSP_TIMEOUT_DEFAULT 30
|
#define NFP_NSP_TIMEOUT_BOOT 30
|
|
/* Offsets relative to the CSR base */
|
#define NSP_STATUS 0x00
|
#define NSP_STATUS_MAGIC GENMASK_ULL(63, 48)
|
#define NSP_STATUS_MAJOR GENMASK_ULL(47, 44)
|
#define NSP_STATUS_MINOR GENMASK_ULL(43, 32)
|
#define NSP_STATUS_CODE GENMASK_ULL(31, 16)
|
#define NSP_STATUS_RESULT GENMASK_ULL(15, 8)
|
#define NSP_STATUS_BUSY BIT_ULL(0)
|
|
#define NSP_COMMAND 0x08
|
#define NSP_COMMAND_OPTION GENMASK_ULL(63, 32)
|
#define NSP_COMMAND_CODE GENMASK_ULL(31, 16)
|
#define NSP_COMMAND_START BIT_ULL(0)
|
|
/* CPP address to retrieve the data from */
|
#define NSP_BUFFER 0x10
|
#define NSP_BUFFER_CPP GENMASK_ULL(63, 40)
|
#define NSP_BUFFER_ADDRESS GENMASK_ULL(39, 0)
|
|
#define NSP_DFLT_BUFFER 0x18
|
#define NSP_DFLT_BUFFER_CPP GENMASK_ULL(63, 40)
|
#define NSP_DFLT_BUFFER_ADDRESS GENMASK_ULL(39, 0)
|
|
#define NSP_DFLT_BUFFER_CONFIG 0x20
|
#define NSP_DFLT_BUFFER_SIZE_MB GENMASK_ULL(7, 0)
|
|
#define NSP_MAGIC 0xab10
|
#define NSP_MAJOR 0
|
#define NSP_MINOR 8
|
|
#define NSP_CODE_MAJOR GENMASK(15, 12)
|
#define NSP_CODE_MINOR GENMASK(11, 0)
|
|
enum nfp_nsp_cmd {
|
SPCODE_NOOP = 0, /* No operation */
|
SPCODE_SOFT_RESET = 1, /* Soft reset the NFP */
|
SPCODE_FW_DEFAULT = 2, /* Load default (UNDI) FW */
|
SPCODE_PHY_INIT = 3, /* Initialize the PHY */
|
SPCODE_MAC_INIT = 4, /* Initialize the MAC */
|
SPCODE_PHY_RXADAPT = 5, /* Re-run PHY RX Adaptation */
|
SPCODE_FW_LOAD = 6, /* Load fw from buffer, len in option */
|
SPCODE_ETH_RESCAN = 7, /* Rescan ETHs, write ETH_TABLE to buf */
|
SPCODE_ETH_CONTROL = 8, /* Update media config from buffer */
|
SPCODE_NSP_WRITE_FLASH = 11, /* Load and flash image from buffer */
|
SPCODE_NSP_SENSORS = 12, /* Read NSP sensor(s) */
|
SPCODE_NSP_IDENTIFY = 13, /* Read NSP version */
|
};
|
|
static const struct {
|
int code;
|
const char *msg;
|
} nsp_errors[] = {
|
{ 6010, "could not map to phy for port" },
|
{ 6011, "not an allowed rate/lanes for port" },
|
{ 6012, "not an allowed rate/lanes for port" },
|
{ 6013, "high/low error, change other port first" },
|
{ 6014, "config not found in flash" },
|
};
|
|
struct nfp_nsp {
|
struct nfp_cpp *cpp;
|
struct nfp_resource *res;
|
struct {
|
u16 major;
|
u16 minor;
|
} ver;
|
|
/* Eth table config state */
|
bool modified;
|
unsigned int idx;
|
void *entries;
|
};
|
|
struct nfp_cpp *nfp_nsp_cpp(struct nfp_nsp *state)
|
{
|
return state->cpp;
|
}
|
|
bool nfp_nsp_config_modified(struct nfp_nsp *state)
|
{
|
return state->modified;
|
}
|
|
void nfp_nsp_config_set_modified(struct nfp_nsp *state, bool modified)
|
{
|
state->modified = modified;
|
}
|
|
void *nfp_nsp_config_entries(struct nfp_nsp *state)
|
{
|
return state->entries;
|
}
|
|
unsigned int nfp_nsp_config_idx(struct nfp_nsp *state)
|
{
|
return state->idx;
|
}
|
|
void
|
nfp_nsp_config_set_state(struct nfp_nsp *state, void *entries, unsigned int idx)
|
{
|
state->entries = entries;
|
state->idx = idx;
|
}
|
|
void nfp_nsp_config_clear_state(struct nfp_nsp *state)
|
{
|
state->entries = NULL;
|
state->idx = 0;
|
}
|
|
static void nfp_nsp_print_extended_error(struct nfp_nsp *state, u32 ret_val)
|
{
|
int i;
|
|
if (!ret_val)
|
return;
|
|
for (i = 0; i < ARRAY_SIZE(nsp_errors); i++)
|
if (ret_val == nsp_errors[i].code)
|
nfp_err(state->cpp, "err msg: %s\n", nsp_errors[i].msg);
|
}
|
|
static int nfp_nsp_check(struct nfp_nsp *state)
|
{
|
struct nfp_cpp *cpp = state->cpp;
|
u64 nsp_status, reg;
|
u32 nsp_cpp;
|
int err;
|
|
nsp_cpp = nfp_resource_cpp_id(state->res);
|
nsp_status = nfp_resource_address(state->res) + NSP_STATUS;
|
|
err = nfp_cpp_readq(cpp, nsp_cpp, nsp_status, ®);
|
if (err < 0)
|
return err;
|
|
if (FIELD_GET(NSP_STATUS_MAGIC, reg) != NSP_MAGIC) {
|
nfp_err(cpp, "Cannot detect NFP Service Processor\n");
|
return -ENODEV;
|
}
|
|
state->ver.major = FIELD_GET(NSP_STATUS_MAJOR, reg);
|
state->ver.minor = FIELD_GET(NSP_STATUS_MINOR, reg);
|
|
if (state->ver.major != NSP_MAJOR || state->ver.minor < NSP_MINOR) {
|
nfp_err(cpp, "Unsupported ABI %hu.%hu\n",
|
state->ver.major, state->ver.minor);
|
return -EINVAL;
|
}
|
|
if (reg & NSP_STATUS_BUSY) {
|
nfp_err(cpp, "Service processor busy!\n");
|
return -EBUSY;
|
}
|
|
return 0;
|
}
|
|
/**
|
* nfp_nsp_open() - Prepare for communication and lock the NSP resource.
|
* @cpp: NFP CPP Handle
|
*/
|
struct nfp_nsp *nfp_nsp_open(struct nfp_cpp *cpp)
|
{
|
struct nfp_resource *res;
|
struct nfp_nsp *state;
|
int err;
|
|
res = nfp_resource_acquire(cpp, NFP_RESOURCE_NSP);
|
if (IS_ERR(res))
|
return (void *)res;
|
|
state = kzalloc(sizeof(*state), GFP_KERNEL);
|
if (!state) {
|
nfp_resource_release(res);
|
return ERR_PTR(-ENOMEM);
|
}
|
state->cpp = cpp;
|
state->res = res;
|
|
err = nfp_nsp_check(state);
|
if (err) {
|
nfp_nsp_close(state);
|
return ERR_PTR(err);
|
}
|
|
return state;
|
}
|
|
/**
|
* nfp_nsp_close() - Clean up and unlock the NSP resource.
|
* @state: NFP SP state
|
*/
|
void nfp_nsp_close(struct nfp_nsp *state)
|
{
|
nfp_resource_release(state->res);
|
kfree(state);
|
}
|
|
u16 nfp_nsp_get_abi_ver_major(struct nfp_nsp *state)
|
{
|
return state->ver.major;
|
}
|
|
u16 nfp_nsp_get_abi_ver_minor(struct nfp_nsp *state)
|
{
|
return state->ver.minor;
|
}
|
|
static int
|
nfp_nsp_wait_reg(struct nfp_cpp *cpp, u64 *reg, u32 nsp_cpp, u64 addr,
|
u64 mask, u64 val, u32 timeout_sec)
|
{
|
const unsigned long wait_until = jiffies + timeout_sec * HZ;
|
int err;
|
|
for (;;) {
|
const unsigned long start_time = jiffies;
|
|
err = nfp_cpp_readq(cpp, nsp_cpp, addr, reg);
|
if (err < 0)
|
return err;
|
|
if ((*reg & mask) == val)
|
return 0;
|
|
msleep(25);
|
|
if (time_after(start_time, wait_until))
|
return -ETIMEDOUT;
|
}
|
}
|
|
/**
|
* __nfp_nsp_command() - Execute a command on the NFP Service Processor
|
* @state: NFP SP state
|
* @code: NFP SP Command Code
|
* @option: NFP SP Command Argument
|
* @buff_cpp: NFP SP Buffer CPP Address info
|
* @buff_addr: NFP SP Buffer Host address
|
* @timeout_sec:Timeout value to wait for completion in seconds
|
*
|
* Return: 0 for success with no result
|
*
|
* positive value for NSP completion with a result code
|
*
|
* -EAGAIN if the NSP is not yet present
|
* -ENODEV if the NSP is not a supported model
|
* -EBUSY if the NSP is stuck
|
* -EINTR if interrupted while waiting for completion
|
* -ETIMEDOUT if the NSP took longer than @timeout_sec seconds to complete
|
*/
|
static int
|
__nfp_nsp_command(struct nfp_nsp *state, u16 code, u32 option, u32 buff_cpp,
|
u64 buff_addr, u32 timeout_sec)
|
{
|
u64 reg, ret_val, nsp_base, nsp_buffer, nsp_status, nsp_command;
|
struct nfp_cpp *cpp = state->cpp;
|
u32 nsp_cpp;
|
int err;
|
|
nsp_cpp = nfp_resource_cpp_id(state->res);
|
nsp_base = nfp_resource_address(state->res);
|
nsp_status = nsp_base + NSP_STATUS;
|
nsp_command = nsp_base + NSP_COMMAND;
|
nsp_buffer = nsp_base + NSP_BUFFER;
|
|
err = nfp_nsp_check(state);
|
if (err)
|
return err;
|
|
if (!FIELD_FIT(NSP_BUFFER_CPP, buff_cpp >> 8) ||
|
!FIELD_FIT(NSP_BUFFER_ADDRESS, buff_addr)) {
|
nfp_err(cpp, "Host buffer out of reach %08x %016llx\n",
|
buff_cpp, buff_addr);
|
return -EINVAL;
|
}
|
|
err = nfp_cpp_writeq(cpp, nsp_cpp, nsp_buffer,
|
FIELD_PREP(NSP_BUFFER_CPP, buff_cpp >> 8) |
|
FIELD_PREP(NSP_BUFFER_ADDRESS, buff_addr));
|
if (err < 0)
|
return err;
|
|
err = nfp_cpp_writeq(cpp, nsp_cpp, nsp_command,
|
FIELD_PREP(NSP_COMMAND_OPTION, option) |
|
FIELD_PREP(NSP_COMMAND_CODE, code) |
|
FIELD_PREP(NSP_COMMAND_START, 1));
|
if (err < 0)
|
return err;
|
|
/* Wait for NSP_COMMAND_START to go to 0 */
|
err = nfp_nsp_wait_reg(cpp, ®, nsp_cpp, nsp_command,
|
NSP_COMMAND_START, 0, NFP_NSP_TIMEOUT_DEFAULT);
|
if (err) {
|
nfp_err(cpp, "Error %d waiting for code 0x%04x to start\n",
|
err, code);
|
return err;
|
}
|
|
/* Wait for NSP_STATUS_BUSY to go to 0 */
|
err = nfp_nsp_wait_reg(cpp, ®, nsp_cpp, nsp_status, NSP_STATUS_BUSY,
|
0, timeout_sec);
|
if (err) {
|
nfp_err(cpp, "Error %d waiting for code 0x%04x to complete\n",
|
err, code);
|
return err;
|
}
|
|
err = nfp_cpp_readq(cpp, nsp_cpp, nsp_command, &ret_val);
|
if (err < 0)
|
return err;
|
ret_val = FIELD_GET(NSP_COMMAND_OPTION, ret_val);
|
|
err = FIELD_GET(NSP_STATUS_RESULT, reg);
|
if (err) {
|
nfp_warn(cpp, "Result (error) code set: %d (%d) command: %d\n",
|
-err, (int)ret_val, code);
|
nfp_nsp_print_extended_error(state, ret_val);
|
return -err;
|
}
|
|
return ret_val;
|
}
|
|
static int
|
nfp_nsp_command(struct nfp_nsp *state, u16 code, u32 option, u32 buff_cpp,
|
u64 buff_addr)
|
{
|
return __nfp_nsp_command(state, code, option, buff_cpp, buff_addr,
|
NFP_NSP_TIMEOUT_DEFAULT);
|
}
|
|
static int
|
__nfp_nsp_command_buf(struct nfp_nsp *nsp, u16 code, u32 option,
|
const void *in_buf, unsigned int in_size, void *out_buf,
|
unsigned int out_size, u32 timeout_sec)
|
{
|
struct nfp_cpp *cpp = nsp->cpp;
|
unsigned int max_size;
|
u64 reg, cpp_buf;
|
int ret, err;
|
u32 cpp_id;
|
|
if (nsp->ver.minor < 13) {
|
nfp_err(cpp, "NSP: Code 0x%04x with buffer not supported (ABI %hu.%hu)\n",
|
code, nsp->ver.major, nsp->ver.minor);
|
return -EOPNOTSUPP;
|
}
|
|
err = nfp_cpp_readq(cpp, nfp_resource_cpp_id(nsp->res),
|
nfp_resource_address(nsp->res) +
|
NSP_DFLT_BUFFER_CONFIG,
|
®);
|
if (err < 0)
|
return err;
|
|
max_size = max(in_size, out_size);
|
if (FIELD_GET(NSP_DFLT_BUFFER_SIZE_MB, reg) * SZ_1M < max_size) {
|
nfp_err(cpp, "NSP: default buffer too small for command 0x%04x (%llu < %u)\n",
|
code, FIELD_GET(NSP_DFLT_BUFFER_SIZE_MB, reg) * SZ_1M,
|
max_size);
|
return -EINVAL;
|
}
|
|
err = nfp_cpp_readq(cpp, nfp_resource_cpp_id(nsp->res),
|
nfp_resource_address(nsp->res) +
|
NSP_DFLT_BUFFER,
|
®);
|
if (err < 0)
|
return err;
|
|
cpp_id = FIELD_GET(NSP_DFLT_BUFFER_CPP, reg) << 8;
|
cpp_buf = FIELD_GET(NSP_DFLT_BUFFER_ADDRESS, reg);
|
|
if (in_buf && in_size) {
|
err = nfp_cpp_write(cpp, cpp_id, cpp_buf, in_buf, in_size);
|
if (err < 0)
|
return err;
|
}
|
/* Zero out remaining part of the buffer */
|
if (out_buf && out_size && out_size > in_size) {
|
memset(out_buf, 0, out_size - in_size);
|
err = nfp_cpp_write(cpp, cpp_id, cpp_buf + in_size,
|
out_buf, out_size - in_size);
|
if (err < 0)
|
return err;
|
}
|
|
ret = __nfp_nsp_command(nsp, code, option, cpp_id, cpp_buf,
|
timeout_sec);
|
if (ret < 0)
|
return ret;
|
|
if (out_buf && out_size) {
|
err = nfp_cpp_read(cpp, cpp_id, cpp_buf, out_buf, out_size);
|
if (err < 0)
|
return err;
|
}
|
|
return ret;
|
}
|
|
static int
|
nfp_nsp_command_buf(struct nfp_nsp *nsp, u16 code, u32 option,
|
const void *in_buf, unsigned int in_size, void *out_buf,
|
unsigned int out_size)
|
{
|
return __nfp_nsp_command_buf(nsp, code, option, in_buf, in_size,
|
out_buf, out_size,
|
NFP_NSP_TIMEOUT_DEFAULT);
|
}
|
|
int nfp_nsp_wait(struct nfp_nsp *state)
|
{
|
const unsigned long wait_until = jiffies + NFP_NSP_TIMEOUT_BOOT * HZ;
|
int err;
|
|
nfp_dbg(state->cpp, "Waiting for NSP to respond (%u sec max).\n",
|
NFP_NSP_TIMEOUT_BOOT);
|
|
for (;;) {
|
const unsigned long start_time = jiffies;
|
|
err = nfp_nsp_command(state, SPCODE_NOOP, 0, 0, 0);
|
if (err != -EAGAIN)
|
break;
|
|
if (msleep_interruptible(25)) {
|
err = -ERESTARTSYS;
|
break;
|
}
|
|
if (time_after(start_time, wait_until)) {
|
err = -ETIMEDOUT;
|
break;
|
}
|
}
|
if (err)
|
nfp_err(state->cpp, "NSP failed to respond %d\n", err);
|
|
return err;
|
}
|
|
int nfp_nsp_device_soft_reset(struct nfp_nsp *state)
|
{
|
return nfp_nsp_command(state, SPCODE_SOFT_RESET, 0, 0, 0);
|
}
|
|
int nfp_nsp_mac_reinit(struct nfp_nsp *state)
|
{
|
return nfp_nsp_command(state, SPCODE_MAC_INIT, 0, 0, 0);
|
}
|
|
int nfp_nsp_load_fw(struct nfp_nsp *state, const struct firmware *fw)
|
{
|
return nfp_nsp_command_buf(state, SPCODE_FW_LOAD, fw->size, fw->data,
|
fw->size, NULL, 0);
|
}
|
|
int nfp_nsp_write_flash(struct nfp_nsp *state, const struct firmware *fw)
|
{
|
/* The flash time is specified to take a maximum of 70s so we add an
|
* additional factor to this spec time.
|
*/
|
u32 timeout_sec = 2.5 * 70;
|
|
return __nfp_nsp_command_buf(state, SPCODE_NSP_WRITE_FLASH, fw->size,
|
fw->data, fw->size, NULL, 0, timeout_sec);
|
}
|
|
int nfp_nsp_read_eth_table(struct nfp_nsp *state, void *buf, unsigned int size)
|
{
|
return nfp_nsp_command_buf(state, SPCODE_ETH_RESCAN, size, NULL, 0,
|
buf, size);
|
}
|
|
int nfp_nsp_write_eth_table(struct nfp_nsp *state,
|
const void *buf, unsigned int size)
|
{
|
return nfp_nsp_command_buf(state, SPCODE_ETH_CONTROL, size, buf, size,
|
NULL, 0);
|
}
|
|
int nfp_nsp_read_identify(struct nfp_nsp *state, void *buf, unsigned int size)
|
{
|
return nfp_nsp_command_buf(state, SPCODE_NSP_IDENTIFY, size, NULL, 0,
|
buf, size);
|
}
|
|
int nfp_nsp_read_sensors(struct nfp_nsp *state, unsigned int sensor_mask,
|
void *buf, unsigned int size)
|
{
|
return nfp_nsp_command_buf(state, SPCODE_NSP_SENSORS, sensor_mask,
|
NULL, 0, buf, size);
|
}
|