List of register populated for dump collection during the GPU reset.
Signed-off-by: Somalapuram Amaranath <Amaranath.Somalapuram@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 5 ++
drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 95 +++++++++++++++++++++
2 files changed, 100 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index b85b67a88a3d..57965316873b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1097,6 +1097,11 @@ struct amdgpu_device {
struct amdgpu_reset_control *reset_cntl;
uint32_t ip_versions[HW_ID_MAX][HWIP_MAX_INSTANCE];
+
+ /* reset dump register */
+ uint32_t *reset_dump_reg_list;
+ int n_regs;
+ struct mutex reset_dump_mutex;
};
static inline struct amdgpu_device *drm_to_adev(struct drm_device *ddev)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
index 164d6a9e9fbb..faf985c7cb93 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c
@@ -1609,6 +1609,98 @@ 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[11];
+ int i, r, len = 0;
+
+ if (*pos)
+ return 0;
+
+ if (adev->n_regs == 0)
+ return 0;
+
+ for (i = 0; i < adev->n_regs; i++) {
+ sprintf(reg_offset, "0x%x ", adev->reset_dump_reg_list[i]);
+ r = copy_to_user(buf + len, reg_offset, strlen(reg_offset));
+
+ if (r)
+ return -EFAULT;
+
+ len += strlen(reg_offset);
+ }
+
+ r = copy_to_user(buf + len, "\n", 1);
+
+ if (r)
+ return -EFAULT;
+
+ len++;
+ *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, *reg, reg_temp[11];
+ static int alloc_count;
+ int ret, i = 0, len = 0;
+
+ do {
+ reg_offset = reg_temp;
+ memset(reg_offset, 0, 11);
+ ret = copy_from_user(reg_offset, buf + len, min(11, ((int)size-len)));
+
+ if (ret)
+ goto failed;
+
+ reg = strsep(®_offset, " ");
+
+ if (alloc_count <= i) {
+ adev->reset_dump_reg_list = krealloc_array(
+ adev->reset_dump_reg_list, 1,
+ sizeof(uint32_t), GFP_KERNEL);
+ alloc_count++;
+ }
+
+ ret = kstrtouint(reg, 16, &adev->reset_dump_reg_list[i]);
+
+ if (ret)
+ goto failed;
+
+ len += strlen(reg) + 1;
+ i++;
+
+ } while (len < size);
+
+ adev->n_regs = i;
+
+ return size;
+
+failed:
+ mutex_lock(&adev->reset_dump_mutex);
+ kfree(adev->reset_dump_reg_list);
+ adev->reset_dump_reg_list = NULL;
+ alloc_count = 0;
+ adev->n_regs = 0;
+ mutex_unlock(&adev->reset_dump_mutex);
+ return -EFAULT;
+}
+
+
+
+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;
@@ -1618,6 +1710,7 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
if (!debugfs_initialized())
return 0;
+ mutex_init(&adev->reset_dump_mutex);
ent = debugfs_create_file("amdgpu_preempt_ib", 0600, root, adev,
&fops_ib_preempt);
if (IS_ERR(ent)) {
@@ -1672,6 +1765,8 @@ int amdgpu_debugfs_init(struct amdgpu_device *adev)
&amdgpu_debugfs_test_ib_fops);
debugfs_create_file("amdgpu_vm_info", 0444, root, adev,
&amdgpu_debugfs_vm_info_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;
--
2.25.1
