Commit 5ce5a584 authored by Somalapuram Amaranath's avatar Somalapuram Amaranath Committed by Alex Deucher
Browse files

drm/amdgpu: add debugfs for reset registers list 



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

Signed-off-by: default avatarSomalapuram Amaranath <Amaranath.Somalapuram@amd.com>
Reviewed-by: default avatarChristian König <christian.koenig@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent b74e2476

drivers/gpu/drm/amd/amdgpu/amdgpu.h

+4 −0
Original line number Diff line number Diff line
@@ -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)

drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c

+82 −0
Original line number Diff line number Diff line
@@ -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;