diff options
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c')
| -rw-r--r-- | drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c | 63 |
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c index a0a14370745e..527ffad47563 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ras.c @@ -128,6 +128,9 @@ const char *get_ras_block_str(struct ras_common_if *ras_block) #define MAX_FLUSH_RETIRE_DWORK_TIMES 100 +#define BYPASS_ALLOCATED_ADDRESS 0x0 +#define BYPASS_INITIALIZATION_ADDRESS 0x1 + enum amdgpu_ras_retire_page_reservation { AMDGPU_RAS_RETIRE_PAGE_RESERVED, AMDGPU_RAS_RETIRE_PAGE_PENDING, @@ -207,6 +210,49 @@ static int amdgpu_reserve_page_direct(struct amdgpu_device *adev, uint64_t addre return 0; } +static int amdgpu_check_address_validity(struct amdgpu_device *adev, + uint64_t address, uint64_t flags) +{ + struct amdgpu_ras *con = amdgpu_ras_get_context(adev); + struct amdgpu_vram_block_info blk_info; + uint64_t page_pfns[32] = {0}; + int i, ret, count; + + if (amdgpu_ip_version(adev, UMC_HWIP, 0) < IP_VERSION(12, 0, 0)) + return 0; + + if ((address >= adev->gmc.mc_vram_size) || + (address >= RAS_UMC_INJECT_ADDR_LIMIT)) + return -EFAULT; + + count = amdgpu_umc_lookup_bad_pages_in_a_row(adev, + address, page_pfns, ARRAY_SIZE(page_pfns)); + if (count <= 0) + return -EPERM; + + for (i = 0; i < count; i++) { + memset(&blk_info, 0, sizeof(blk_info)); + ret = amdgpu_vram_mgr_query_address_block_info(&adev->mman.vram_mgr, + page_pfns[i] << AMDGPU_GPU_PAGE_SHIFT, &blk_info); + if (!ret) { + /* The input address that needs to be checked is allocated by + * current calling process, so it is necessary to exclude + * the calling process. + */ + if ((flags == BYPASS_ALLOCATED_ADDRESS) && + ((blk_info.task.pid != task_pid_nr(current)) || + strncmp(blk_info.task.comm, current->comm, TASK_COMM_LEN))) + return -EACCES; + else if ((flags == BYPASS_INITIALIZATION_ADDRESS) && + (blk_info.task.pid == con->init_task_pid) && + !strncmp(blk_info.task.comm, con->init_task_comm, TASK_COMM_LEN)) + return -EACCES; + } + } + + return 0; +} + static ssize_t amdgpu_ras_debugfs_read(struct file *f, char __user *buf, size_t size, loff_t *pos) { @@ -297,6 +343,8 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f, op = 2; else if (strstr(str, "retire_page") != NULL) op = 3; + else if (strstr(str, "check_address") != NULL) + op = 4; else if (str[0] && str[1] && str[2] && str[3]) /* ascii string, but commands are not matched. */ return -EINVAL; @@ -311,6 +359,15 @@ static int amdgpu_ras_debugfs_ctrl_parse_data(struct file *f, data->inject.address = address; return 0; + } else if (op == 4) { + if (sscanf(str, "%*s 0x%llx 0x%llx", &address, &value) != 2 && + sscanf(str, "%*s %llu %llu", &address, &value) != 2) + return -EINVAL; + + data->op = op; + data->inject.address = address; + data->inject.value = value; + return 0; } if (amdgpu_ras_find_block_id_by_name(block_name, &block_id)) @@ -500,6 +557,9 @@ static ssize_t amdgpu_ras_debugfs_ctrl_write(struct file *f, return size; else return ret; + } else if (data.op == 4) { + ret = amdgpu_check_address_validity(adev, data.inject.address, data.inject.value); + return ret ? ret : size; } if (!amdgpu_ras_is_supported(adev, data.head.block)) @@ -4087,6 +4147,9 @@ int amdgpu_ras_init(struct amdgpu_device *adev) goto release_con; } + con->init_task_pid = task_pid_nr(current); + get_task_comm(con->init_task_comm, current); + dev_info(adev->dev, "RAS INFO: ras initialized successfully, " "hardware ability[%x] ras_mask[%x]\n", adev->ras_hw_enabled, adev->ras_enabled); |