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drm/lima: save task info dump when task fail

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Save all information to start a task which can be exported to user
for debug usage. Dump file data format is specified in lima_dump.h

v2:
Add include header to address build robot complain.

Tested-by: Andreas Baierl <ichgeh@imkreisrum.de>
Reviewed-by: Vasily Khoruzhick <anarsoul@gmail.com>
Signed-off-by: Qiang Yu <yuq825@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200307134423.24329-1-yuq825@gmail.com
This commit is contained in:
Qiang Yu 2020-03-07 21:44:23 +08:00
parent c67a3d4f68
commit b78edd46f6
5 changed files with 235 additions and 0 deletions
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13
drivers/gpu/drm/lima/lima_device.c
View File

@ -344,6 +344,12 @@ int lima_device_init(struct lima_device *ldev)
if (err)
goto err_out5;
ldev->dump.magic = LIMA_DUMP_MAGIC;
ldev->dump.version_major = LIMA_DUMP_MAJOR;
ldev->dump.version_minor = LIMA_DUMP_MINOR;
INIT_LIST_HEAD(&ldev->error_task_list);
mutex_init(&ldev->error_task_list_lock);
dev_info(ldev->dev, "bus rate = %lu\n", clk_get_rate(ldev->clk_bus));
dev_info(ldev->dev, "mod rate = %lu", clk_get_rate(ldev->clk_gpu));
@ -370,6 +376,13 @@ err_out0:
void lima_device_fini(struct lima_device *ldev)
{
int i;
struct lima_sched_error_task *et, *tmp;
list_for_each_entry_safe(et, tmp, &ldev->error_task_list, list) {
list_del(&et->list);
kvfree(et);
}
mutex_destroy(&ldev->error_task_list_lock);
lima_fini_pp_pipe(ldev);
lima_fini_gp_pipe(ldev);

8
drivers/gpu/drm/lima/lima_device.h
View File

@ -6,8 +6,11 @@
#include <drm/drm_device.h>
#include <linux/delay.h>
#include <linux/list.h>
#include <linux/mutex.h>
#include "lima_sched.h"
#include "lima_dump.h"
enum lima_gpu_id {
lima_gpu_mali400 = 0,
@ -94,6 +97,11 @@ struct lima_device {
u32 *dlbu_cpu;
dma_addr_t dlbu_dma;
/* debug info */
struct lima_dump_head dump;
struct list_head error_task_list;
struct mutex error_task_list_lock;
};
static inline struct lima_device *

77
drivers/gpu/drm/lima/lima_dump.h Normal file
View File

@ -0,0 +1,77 @@
/* SPDX-License-Identifier: GPL-2.0 OR MIT */
/* Copyright 2020 Qiang Yu <yuq825@gmail.com> */
#ifndef __LIMA_DUMP_H__
#define __LIMA_DUMP_H__
#include <linux/types.h>
/**
* dump file format for all the information to start a lima task
*
* top level format
* | magic code "LIMA" | format version | num tasks | data size |
* | reserved | reserved | reserved | reserved |
* | task 1 ID | task 1 size | num chunks | reserved | task 1 data |
* | task 2 ID | task 2 size | num chunks | reserved | task 2 data |
* ...
*
* task data format
* | chunk 1 ID | chunk 1 size | reserved | reserved | chunk 1 data |
* | chunk 2 ID | chunk 2 size | reserved | reserved | chunk 2 data |
* ...
*
*/
#define LIMA_DUMP_MAJOR 1
#define LIMA_DUMP_MINOR 0
#define LIMA_DUMP_MAGIC 0x414d494c
struct lima_dump_head {
__u32 magic;
__u16 version_major;
__u16 version_minor;
__u32 num_tasks;
__u32 size;
__u32 reserved[4];
};
#define LIMA_DUMP_TASK_GP 0
#define LIMA_DUMP_TASK_PP 1
#define LIMA_DUMP_TASK_NUM 2
struct lima_dump_task {
__u32 id;
__u32 size;
__u32 num_chunks;
__u32 reserved;
};
#define LIMA_DUMP_CHUNK_FRAME 0
#define LIMA_DUMP_CHUNK_BUFFER 1
#define LIMA_DUMP_CHUNK_PROCESS_NAME 2
#define LIMA_DUMP_CHUNK_PROCESS_ID 3
#define LIMA_DUMP_CHUNK_NUM 4
struct lima_dump_chunk {
__u32 id;
__u32 size;
__u32 reserved[2];
};
struct lima_dump_chunk_buffer {
__u32 id;
__u32 size;
__u32 va;
__u32 reserved;
};
struct lima_dump_chunk_pid {
__u32 id;
__u32 size;
__u32 pid;
__u32 reserved;
};
#endif

130
drivers/gpu/drm/lima/lima_sched.c
View File

@ -4,6 +4,7 @@
#include <linux/kthread.h>
#include <linux/slab.h>
#include <linux/xarray.h>
#include <linux/vmalloc.h>
#include "lima_drv.h"
#include "lima_sched.h"
@ -256,6 +257,133 @@ static struct dma_fence *lima_sched_run_job(struct drm_sched_job *job)
return task->fence;
}
static void lima_sched_build_error_task_list(struct lima_sched_task *task)
{
struct lima_sched_error_task *et;
struct lima_sched_pipe *pipe = to_lima_pipe(task->base.sched);
struct lima_ip *ip = pipe->processor[0];
int pipe_id = ip->id == lima_ip_gp ? lima_pipe_gp : lima_pipe_pp;
struct lima_device *dev = ip->dev;
struct lima_sched_context *sched_ctx =
container_of(task->base.entity,
struct lima_sched_context, base);
struct lima_ctx *ctx =
container_of(sched_ctx, struct lima_ctx, context[pipe_id]);
struct lima_dump_task *dt;
struct lima_dump_chunk *chunk;
struct lima_dump_chunk_pid *pid_chunk;
struct lima_dump_chunk_buffer *buffer_chunk;
u32 size, task_size, mem_size;
int i;
mutex_lock(&dev->error_task_list_lock);
if (dev->dump.num_tasks >= lima_max_error_tasks) {
dev_info(dev->dev, "fail to save task state: error task list is full\n");
goto out;
}
/* frame chunk */
size = sizeof(struct lima_dump_chunk) + pipe->frame_size;
/* process name chunk */
size += sizeof(struct lima_dump_chunk) + sizeof(ctx->pname);
/* pid chunk */
size += sizeof(struct lima_dump_chunk);
/* buffer chunks */
for (i = 0; i < task->num_bos; i++) {
struct lima_bo *bo = task->bos[i];
size += sizeof(struct lima_dump_chunk);
size += bo->heap_size ? bo->heap_size : lima_bo_size(bo);
}
task_size = size + sizeof(struct lima_dump_task);
mem_size = task_size + sizeof(*et);
et = kvmalloc(mem_size, GFP_KERNEL);
if (!et) {
dev_err(dev->dev, "fail to alloc task dump buffer of size %x\n",
mem_size);
goto out;
}
et->data = et + 1;
et->size = task_size;
dt = et->data;
memset(dt, 0, sizeof(*dt));
dt->id = pipe_id;
dt->size = size;
chunk = (struct lima_dump_chunk *)(dt + 1);
memset(chunk, 0, sizeof(*chunk));
chunk->id = LIMA_DUMP_CHUNK_FRAME;
chunk->size = pipe->frame_size;
memcpy(chunk + 1, task->frame, pipe->frame_size);
dt->num_chunks++;
chunk = (void *)(chunk + 1) + chunk->size;
memset(chunk, 0, sizeof(*chunk));
chunk->id = LIMA_DUMP_CHUNK_PROCESS_NAME;
chunk->size = sizeof(ctx->pname);
memcpy(chunk + 1, ctx->pname, sizeof(ctx->pname));
dt->num_chunks++;
pid_chunk = (void *)(chunk + 1) + chunk->size;
memset(pid_chunk, 0, sizeof(*pid_chunk));
pid_chunk->id = LIMA_DUMP_CHUNK_PROCESS_ID;
pid_chunk->pid = ctx->pid;
dt->num_chunks++;
buffer_chunk = (void *)(pid_chunk + 1) + pid_chunk->size;
for (i = 0; i < task->num_bos; i++) {
struct lima_bo *bo = task->bos[i];
void *data;
memset(buffer_chunk, 0, sizeof(*buffer_chunk));
buffer_chunk->id = LIMA_DUMP_CHUNK_BUFFER;
buffer_chunk->va = lima_vm_get_va(task->vm, bo);
if (bo->heap_size) {
buffer_chunk->size = bo->heap_size;
data = vmap(bo->base.pages, bo->heap_size >> PAGE_SHIFT,
VM_MAP, pgprot_writecombine(PAGE_KERNEL));
if (!data) {
kvfree(et);
goto out;
}
memcpy(buffer_chunk + 1, data, buffer_chunk->size);
vunmap(data);
} else {
buffer_chunk->size = lima_bo_size(bo);
data = drm_gem_shmem_vmap(&bo->base.base);
if (IS_ERR_OR_NULL(data)) {
kvfree(et);
goto out;
}
memcpy(buffer_chunk + 1, data, buffer_chunk->size);
drm_gem_shmem_vunmap(&bo->base.base, data);
}
buffer_chunk = (void *)(buffer_chunk + 1) + buffer_chunk->size;
dt->num_chunks++;
}
list_add(&et->list, &dev->error_task_list);
dev->dump.size += et->size;
dev->dump.num_tasks++;
dev_info(dev->dev, "save error task state success\n");
out:
mutex_unlock(&dev->error_task_list_lock);
}
static void lima_sched_timedout_job(struct drm_sched_job *job)
{
struct lima_sched_pipe *pipe = to_lima_pipe(job->sched);
@ -268,6 +396,8 @@ static void lima_sched_timedout_job(struct drm_sched_job *job)
drm_sched_increase_karma(&task->base);
lima_sched_build_error_task_list(task);
pipe->task_error(pipe);
if (pipe->bcast_mmu)

7
drivers/gpu/drm/lima/lima_sched.h
View File

@ -5,9 +5,16 @@
#define __LIMA_SCHED_H__
#include <drm/gpu_scheduler.h>
#include <linux/list.h>
struct lima_vm;
struct lima_sched_error_task {
struct list_head list;
void *data;
u32 size;
};
struct lima_sched_task {
struct drm_sched_job base;