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drm/amdgpu: add debugfs for reset registers list

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List of register populated for dump collection during the GPU reset.

Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Somalapuram Amaranath 2022-02-23 16:20:31 +05:30 • committed by Alex Deucher
parent b74e2476ef
commit 5ce5a584cb
2 changed files with 86 additions and 0 deletions
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4
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View file

@ -1094,6 +1094,10 @@ struct amdgpu_device {
struct ip_discovery_top *ip_top;
struct mutex benchmark_mutex;
/* reset dump register */
uint32_t *reset_dump_reg_list;
int num_regs;
};
static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)

82
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
View file

@ -1638,6 +1638,86 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_ib_preempt, NULL,
DEFINE_DEBUGFS_ATTRIBUTE(fops_sclk_set, NULL,
amdgpu_debugfs_sclk_set, "%llu\n");
static ssize_t amdgpu_reset_dump_register_list_read(struct file *f,
char __user *buf, size_t size, loff_t *pos)
{
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
char reg_offset[12];
int i, ret, len = 0;
if (*pos)
return 0;
memset(reg_offset, 0, 12);
ret = down_read_killable(&adev->reset_sem);
if (ret)
return ret;
for (i = 0; i < adev->num_regs; i++) {
sprintf(reg_offset, "0x%x\n", adev->reset_dump_reg_list[i]);
up_read(&adev->reset_sem);
if (copy_to_user(buf + len, reg_offset, strlen(reg_offset)))
return -EFAULT;
len += strlen(reg_offset);
ret = down_read_killable(&adev->reset_sem);
if (ret)
return ret;
}
up_read(&adev->reset_sem);
*pos += len;
return len;
}
static ssize_t amdgpu_reset_dump_register_list_write(struct file *f,
const char __user *buf, size_t size, loff_t *pos)
{
struct amdgpu_device *adev = (struct amdgpu_device *)file_inode(f)->i_private;
char reg_offset[11];
uint32_t *tmp;
int ret, i = 0, len = 0;
do {
memset(reg_offset, 0, 11);
if (copy_from_user(reg_offset, buf + len,
min(10, ((int)size-len)))) {
ret = -EFAULT;
goto error_free;
}
tmp = krealloc_array(tmp, i + 1, sizeof(uint32_t), GFP_KERNEL);
if (sscanf(reg_offset, "%X %n", &tmp[i], &ret) != 1) {
ret = -EINVAL;
goto error_free;
}
len += ret;
i++;
} while (len < size);
ret = down_write_killable(&adev->reset_sem);
if (ret)
goto error_free;
swap(adev->reset_dump_reg_list, tmp);
adev->num_regs = i;
up_write(&adev->reset_sem);
ret = size;
error_free:
kfree(tmp);
return ret;
}
static const struct file_operations amdgpu_reset_dump_register_list = {
.owner = THIS_MODULE,
.read = amdgpu_reset_dump_register_list_read,
.write = amdgpu_reset_dump_register_list_write,
.llseek = default_llseek
};
int amdgpu_debugfs_init(struct amdgpu_device *adev)
{
struct dentry *root = adev_to_drm(adev)->primary->debugfs_root;
@ -1706,6 +1786,8 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
&amdgpu_debugfs_vm_info_fops);
debugfs_create_file("amdgpu_benchmark", 0200, root, adev,
&amdgpu_benchmark_fops);
debugfs_create_file("amdgpu_reset_dump_register_list", 0644, root, adev,
&amdgpu_reset_dump_register_list);
adev->debugfs_vbios_blob.data = adev->bios;
adev->debugfs_vbios_blob.size = adev->bios_size;