259 lines
7.6 KiB
C
259 lines
7.6 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2018, Mellanox Technologies. All rights reserved.
|
||
|
|
*
|
||
|
|
* This software is available to you under a choice of one of two
|
||
|
|
* licenses. You may choose to be licensed under the terms of the GNU
|
||
|
|
* General Public License (GPL) Version 2, available from the file
|
||
|
|
* COPYING in the main directory of this source tree, or the
|
||
|
|
* OpenIB.org BSD license below:
|
||
|
|
*
|
||
|
|
* Redistribution and use in source and binary forms, with or
|
||
|
|
* without modification, are permitted provided that the following
|
||
|
|
* conditions are met:
|
||
|
|
*
|
||
|
|
* - Redistributions of source code must retain the above
|
||
|
|
* copyright notice, this list of conditions and the following
|
||
|
|
* disclaimer.
|
||
|
|
*
|
||
|
|
* - 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#include "mlx4.h"
|
||
|
|
|
||
|
|
#define BAD_ACCESS 0xBADACCE5
|
||
|
|
#define HEALTH_BUFFER_SIZE 0x40
|
||
|
|
#define CR_ENABLE_BIT swab32(BIT(6))
|
||
|
|
#define CR_ENABLE_BIT_OFFSET 0xF3F04
|
||
|
|
#define MAX_NUM_OF_DUMPS_TO_STORE (8)
|
||
|
|
|
||
|
|
#define REGION_CR_SPACE "cr-space"
|
||
|
|
#define REGION_FW_HEALTH "fw-health"
|
||
|
|
|
||
|
|
static const char * const region_cr_space_str = REGION_CR_SPACE;
|
||
|
|
static const char * const region_fw_health_str = REGION_FW_HEALTH;
|
||
|
|
|
||
|
|
static const struct devlink_region_ops region_cr_space_ops = {
|
||
|
|
.name = REGION_CR_SPACE,
|
||
|
|
.destructor = &kvfree,
|
||
|
|
};
|
||
|
|
|
||
|
|
static const struct devlink_region_ops region_fw_health_ops = {
|
||
|
|
.name = REGION_FW_HEALTH,
|
||
|
|
.destructor = &kvfree,
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Set to true in case cr enable bit was set to true before crdump */
|
||
|
|
static bool crdump_enbale_bit_set;
|
||
|
|
|
||
|
|
static void crdump_enable_crspace_access(struct mlx4_dev *dev,
|
||
|
|
u8 __iomem *cr_space)
|
||
|
|
{
|
||
|
|
/* Get current enable bit value */
|
||
|
|
crdump_enbale_bit_set =
|
||
|
|
readl(cr_space + CR_ENABLE_BIT_OFFSET) & CR_ENABLE_BIT;
|
||
|
|
|
||
|
|
/* Enable FW CR filter (set bit6 to 0) */
|
||
|
|
if (crdump_enbale_bit_set)
|
||
|
|
writel(readl(cr_space + CR_ENABLE_BIT_OFFSET) & ~CR_ENABLE_BIT,
|
||
|
|
cr_space + CR_ENABLE_BIT_OFFSET);
|
||
|
|
|
||
|
|
/* Enable block volatile crspace accesses */
|
||
|
|
writel(swab32(1), cr_space + dev->caps.health_buffer_addrs +
|
||
|
|
HEALTH_BUFFER_SIZE);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void crdump_disable_crspace_access(struct mlx4_dev *dev,
|
||
|
|
u8 __iomem *cr_space)
|
||
|
|
{
|
||
|
|
/* Disable block volatile crspace accesses */
|
||
|
|
writel(0, cr_space + dev->caps.health_buffer_addrs +
|
||
|
|
HEALTH_BUFFER_SIZE);
|
||
|
|
|
||
|
|
/* Restore FW CR filter value (set bit6 to original value) */
|
||
|
|
if (crdump_enbale_bit_set)
|
||
|
|
writel(readl(cr_space + CR_ENABLE_BIT_OFFSET) | CR_ENABLE_BIT,
|
||
|
|
cr_space + CR_ENABLE_BIT_OFFSET);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void mlx4_crdump_collect_crspace(struct mlx4_dev *dev,
|
||
|
|
u8 __iomem *cr_space,
|
||
|
|
u32 id)
|
||
|
|
{
|
||
|
|
struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
|
||
|
|
struct pci_dev *pdev = dev->persist->pdev;
|
||
|
|
unsigned long cr_res_size;
|
||
|
|
u8 *crspace_data;
|
||
|
|
int offset;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (!crdump->region_crspace) {
|
||
|
|
mlx4_err(dev, "crdump: cr-space region is NULL\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Try to collect CR space */
|
||
|
|
cr_res_size = pci_resource_len(pdev, 0);
|
||
|
|
crspace_data = kvmalloc(cr_res_size, GFP_KERNEL);
|
||
|
|
if (crspace_data) {
|
||
|
|
for (offset = 0; offset < cr_res_size; offset += 4)
|
||
|
|
*(u32 *)(crspace_data + offset) =
|
||
|
|
readl(cr_space + offset);
|
||
|
|
|
||
|
|
err = devlink_region_snapshot_create(crdump->region_crspace,
|
||
|
|
crspace_data, id);
|
||
|
|
if (err) {
|
||
|
|
kvfree(crspace_data);
|
||
|
|
mlx4_warn(dev, "crdump: devlink create %s snapshot id %d err %d\n",
|
||
|
|
region_cr_space_str, id, err);
|
||
|
|
} else {
|
||
|
|
mlx4_info(dev, "crdump: added snapshot %d to devlink region %s\n",
|
||
|
|
id, region_cr_space_str);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
mlx4_err(dev, "crdump: Failed to allocate crspace buffer\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
static void mlx4_crdump_collect_fw_health(struct mlx4_dev *dev,
|
||
|
|
u8 __iomem *cr_space,
|
||
|
|
u32 id)
|
||
|
|
{
|
||
|
|
struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
|
||
|
|
u8 *health_data;
|
||
|
|
int offset;
|
||
|
|
int err;
|
||
|
|
|
||
|
|
if (!crdump->region_fw_health) {
|
||
|
|
mlx4_err(dev, "crdump: fw-health region is NULL\n");
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Try to collect health buffer */
|
||
|
|
health_data = kvmalloc(HEALTH_BUFFER_SIZE, GFP_KERNEL);
|
||
|
|
if (health_data) {
|
||
|
|
u8 __iomem *health_buf_start =
|
||
|
|
cr_space + dev->caps.health_buffer_addrs;
|
||
|
|
|
||
|
|
for (offset = 0; offset < HEALTH_BUFFER_SIZE; offset += 4)
|
||
|
|
*(u32 *)(health_data + offset) =
|
||
|
|
readl(health_buf_start + offset);
|
||
|
|
|
||
|
|
err = devlink_region_snapshot_create(crdump->region_fw_health,
|
||
|
|
health_data, id);
|
||
|
|
if (err) {
|
||
|
|
kvfree(health_data);
|
||
|
|
mlx4_warn(dev, "crdump: devlink create %s snapshot id %d err %d\n",
|
||
|
|
region_fw_health_str, id, err);
|
||
|
|
} else {
|
||
|
|
mlx4_info(dev, "crdump: added snapshot %d to devlink region %s\n",
|
||
|
|
id, region_fw_health_str);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
mlx4_err(dev, "crdump: Failed to allocate health buffer\n");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int mlx4_crdump_collect(struct mlx4_dev *dev)
|
||
|
|
{
|
||
|
|
struct devlink *devlink = priv_to_devlink(mlx4_priv(dev));
|
||
|
|
struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
|
||
|
|
struct pci_dev *pdev = dev->persist->pdev;
|
||
|
|
unsigned long cr_res_size;
|
||
|
|
u8 __iomem *cr_space;
|
||
|
|
int err;
|
||
|
|
u32 id;
|
||
|
|
|
||
|
|
if (!dev->caps.health_buffer_addrs) {
|
||
|
|
mlx4_info(dev, "crdump: FW doesn't support health buffer access, skipping\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!crdump->snapshot_enable) {
|
||
|
|
mlx4_info(dev, "crdump: devlink snapshot disabled, skipping\n");
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
cr_res_size = pci_resource_len(pdev, 0);
|
||
|
|
|
||
|
|
cr_space = ioremap(pci_resource_start(pdev, 0), cr_res_size);
|
||
|
|
if (!cr_space) {
|
||
|
|
mlx4_err(dev, "crdump: Failed to map pci cr region\n");
|
||
|
|
return -ENODEV;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* Get the available snapshot ID for the dumps */
|
||
|
|
err = devlink_region_snapshot_id_get(devlink, &id);
|
||
|
|
if (err) {
|
||
|
|
mlx4_err(dev, "crdump: devlink get snapshot id err %d\n", err);
|
||
|
|
iounmap(cr_space);
|
||
|
|
return err;
|
||
|
|
}
|
||
|
|
|
||
|
|
crdump_enable_crspace_access(dev, cr_space);
|
||
|
|
|
||
|
|
/* Try to capture dumps */
|
||
|
|
mlx4_crdump_collect_crspace(dev, cr_space, id);
|
||
|
|
mlx4_crdump_collect_fw_health(dev, cr_space, id);
|
||
|
|
|
||
|
|
/* Release reference on the snapshot id */
|
||
|
|
devlink_region_snapshot_id_put(devlink, id);
|
||
|
|
|
||
|
|
crdump_disable_crspace_access(dev, cr_space);
|
||
|
|
|
||
|
|
iounmap(cr_space);
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
int mlx4_crdump_init(struct mlx4_dev *dev)
|
||
|
|
{
|
||
|
|
struct devlink *devlink = priv_to_devlink(mlx4_priv(dev));
|
||
|
|
struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
|
||
|
|
struct pci_dev *pdev = dev->persist->pdev;
|
||
|
|
|
||
|
|
crdump->snapshot_enable = false;
|
||
|
|
|
||
|
|
/* Create cr-space region */
|
||
|
|
crdump->region_crspace =
|
||
|
|
devl_region_create(devlink,
|
||
|
|
®ion_cr_space_ops,
|
||
|
|
MAX_NUM_OF_DUMPS_TO_STORE,
|
||
|
|
pci_resource_len(pdev, 0));
|
||
|
|
if (IS_ERR(crdump->region_crspace))
|
||
|
|
mlx4_warn(dev, "crdump: create devlink region %s err %ld\n",
|
||
|
|
region_cr_space_str,
|
||
|
|
PTR_ERR(crdump->region_crspace));
|
||
|
|
|
||
|
|
/* Create fw-health region */
|
||
|
|
crdump->region_fw_health =
|
||
|
|
devl_region_create(devlink,
|
||
|
|
®ion_fw_health_ops,
|
||
|
|
MAX_NUM_OF_DUMPS_TO_STORE,
|
||
|
|
HEALTH_BUFFER_SIZE);
|
||
|
|
if (IS_ERR(crdump->region_fw_health))
|
||
|
|
mlx4_warn(dev, "crdump: create devlink region %s err %ld\n",
|
||
|
|
region_fw_health_str,
|
||
|
|
PTR_ERR(crdump->region_fw_health));
|
||
|
|
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
void mlx4_crdump_end(struct mlx4_dev *dev)
|
||
|
|
{
|
||
|
|
struct mlx4_fw_crdump *crdump = &dev->persist->crdump;
|
||
|
|
|
||
|
|
devl_region_destroy(crdump->region_fw_health);
|
||
|
|
devl_region_destroy(crdump->region_crspace);
|
||
|
|
}
|