PSP will dump various boot up information into a
portion of local frame buffer, called runtime database.
The helper function is used for driver to query those
shared information.
v2: init ret and check !ret to exit loop as soon as
found the entry
Signed-off-by: Hawking Zhang <Hawking.Zhang@xxxxxxx>
Reviewed-by: John Clements <john.clements@xxxxxxx>
Reviewed-by: Lijo Lazar <lijo.lazar@xxxxxxx>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 68 +++++++++++++++++++++++++
1 file changed, 68 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index ab4e89186186..dc786c91ec9d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -164,6 +164,74 @@ static int psp_memory_training_init(struct psp_context *psp)
return ret;
}
+/*
+ * Helper funciton to query psp runtime database entry
+ *
+ * @adev: amdgpu_device pointer
+ * @entry_type: the type of psp runtime database entry
+ * @db_entry: runtime database entry pointer
+ *
+ * Return false if runtime database doesn't exit or entry is invalid
+ * or true if the specific database entry is found, and copy to @db_entry
+ */
+static bool psp_get_runtime_db_entry(struct amdgpu_device *adev,
+ enum psp_runtime_entry_type entry_type,
+ void *db_entry)
+{
+ uint64_t db_header_pos, db_dir_pos;
+ struct psp_runtime_data_header db_header = {0};
+ struct psp_runtime_data_directory db_dir = {0};
+ bool ret = false;
+ int i;
+
+ db_header_pos = adev->gmc.mc_vram_size - PSP_RUNTIME_DB_OFFSET;
+ db_dir_pos = db_header_pos + sizeof(struct psp_runtime_data_header);
+
+ /* read runtime db header from vram */
+ amdgpu_device_vram_access(adev, db_header_pos, (uint32_t *)&db_header,
+ sizeof(struct psp_runtime_data_header), false);
+
+ if (db_header.cookie != PSP_RUNTIME_DB_COOKIE_ID) {
+ /* runtime db doesn't exist, exit */
+ dev_warn(adev->dev, "PSP runtime database doesn't exist\n");
+ return false;
+ }
+
+ /* read runtime database entry from vram */
+ amdgpu_device_vram_access(adev, db_dir_pos, (uint32_t *)&db_dir,
+ sizeof(struct psp_runtime_data_directory), false);
+
+ if (db_dir.entry_count >= PSP_RUNTIME_DB_DIAG_ENTRY_MAX_COUNT) {
+ /* invalid db entry count, exit */
+ dev_warn(adev->dev, "Invalid PSP runtime database entry count\n");
+ return false;
+ }
+
+ /* look up for requested entry type */
+ for (i = 0; i < db_dir.entry_count && !ret; i++) {
+ if (db_dir.entry_list[i].entry_type == entry_type) {
+ switch (entry_type) {
+ case PSP_RUNTIME_ENTRY_TYPE_BOOT_CONFIG:
+ if (db_dir.entry_list[i].size < sizeof(struct psp_runtime_boot_cfg_entry)) {
+ /* invalid db entry size */
+ dev_warn(adev->dev, "Invalid PSP runtime database entry size\n");
+ return false;
+ }
+ /* read runtime database entry */
+ amdgpu_device_vram_access(adev, db_header_pos + db_dir.entry_list[i].offset,
+ (uint32_t *)db_entry, sizeof(struct psp_runtime_boot_cfg_entry), false);
+ ret = true;
+ break;
+ default:
+ ret = false;
+ break;
+ }
+ }
+ }
+
+ return ret;
+}
+
static int psp_sw_init(void *handle)
{
struct amdgpu_device *adev = (struct amdgpu_device *)handle;
--
2.17.1
_______________________________________________
amd-gfx mailing list
amd-gfx@xxxxxxxxxxxxxxxxxxxxx
https://lists.freedesktop.org/mailman/listinfo/amd-gfx
