[Lima] [PATCH v2 3/6] drm/lima: save task info dump when task fail
Qiang Yu
yuq825 at gmail.com
Sat Mar 7 13:44:23 UTC 2020
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.
Signed-off-by: Qiang Yu <yuq825 at gmail.com>
---
drivers/gpu/drm/lima/lima_device.c | 13 +++
drivers/gpu/drm/lima/lima_device.h | 8 ++
drivers/gpu/drm/lima/lima_dump.h | 77 +++++++++++++++++
drivers/gpu/drm/lima/lima_sched.c | 129 +++++++++++++++++++++++++++++
drivers/gpu/drm/lima/lima_sched.h | 7 ++
5 files changed, 234 insertions(+)
create mode 100644 drivers/gpu/drm/lima/lima_dump.h
diff --git a/drivers/gpu/drm/lima/lima_device.c b/drivers/gpu/drm/lima/lima_device.c
index 19829b543024..42a00171fea5 100644
--- a/drivers/gpu/drm/lima/lima_device.c
+++ b/drivers/gpu/drm/lima/lima_device.c
@@ -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 @@ int lima_device_init(struct lima_device *ldev)
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);
diff --git a/drivers/gpu/drm/lima/lima_device.h b/drivers/gpu/drm/lima/lima_device.h
index 31158d86271c..f17173f47f26 100644
--- a/drivers/gpu/drm/lima/lima_device.h
+++ b/drivers/gpu/drm/lima/lima_device.h
@@ -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 *
diff --git a/drivers/gpu/drm/lima/lima_dump.h b/drivers/gpu/drm/lima/lima_dump.h
new file mode 100644
index 000000000000..ca243d99c51b
--- /dev/null
+++ b/drivers/gpu/drm/lima/lima_dump.h
@@ -0,0 +1,77 @@
+/* SPDX-License-Identifier: GPL-2.0 OR MIT */
+/* Copyright 2020 Qiang Yu <yuq825 at 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
diff --git a/drivers/gpu/drm/lima/lima_sched.c b/drivers/gpu/drm/lima/lima_sched.c
index 3886999b4533..f295479e3733 100644
--- a/drivers/gpu/drm/lima/lima_sched.c
+++ b/drivers/gpu/drm/lima/lima_sched.c
@@ -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 +257,132 @@ 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;
+ uint32_t 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 +395,8 @@ 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)
diff --git a/drivers/gpu/drm/lima/lima_sched.h b/drivers/gpu/drm/lima/lima_sched.h
index d64393fb50a9..e29f5e3b675b 100644
--- a/drivers/gpu/drm/lima/lima_sched.h
+++ b/drivers/gpu/drm/lima/lima_sched.h
@@ -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;
+ uint32_t size;
+};
+
struct lima_sched_task {
struct drm_sched_job base;
--
2.17.1
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