From 5ce5a584cb826f1c1f0625a336134feb4e1142cd Mon Sep 17 00:00:00 2001 From: Somalapuram Amaranath Date: Wed, 23 Feb 2022 16:20:31 +0530 Subject: drm/amdgpu: add debugfs for reset registers list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit List of register populated for dump collection during the GPU reset. Signed-off-by: Somalapuram Amaranath Reviewed-by: Christian König Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c | 82 +++++++++++++++++++++++++++++ 1 file changed, 82 insertions(+) (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c') diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c index 9ec4d3225763..9eb9b440bd43 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_debugfs.c @@ -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; -- cgit v1.2.3