On 2/16/2022 4:04 PM, Somalapuram, Amaranath wrote:
On 2/16/2022 3:45 PM, Lazar, Lijo wrote:On 2/16/2022 3:19 PM, Somalapuram Amaranath wrote: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.hindex 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.cindex 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;This being static what happens when it is called on a second device? Thanks, LijoI tried to avoid adding to adev. It wont work for multiple devices.
Hmm.This is not friendly for single device also. Some one could just parse a text file of reg offsets and do
sudo echo offset > file This will overwrite whatever is there. Instead you may define a syntax like sudo echo 0x000 > file => Clears all sudo echo offset > file => Append to the existing set. Taking all offsets in one go may not be needed. Thanks, Lijo
+ 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;
