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drm/amdgpu: add helper function to query psp runtime db entry (v2) 

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@amd.com>
Reviewed-by: John Clements <john.clements@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Hawking Zhang 2021-06-07 20:31:30 +08:00 committed by Alex Deucher
parent 990ec3014d
commit 3d689ae4a9
1 changed files with 68 additions and 0 deletions
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68
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
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@ -171,6 +171,74 @@ 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;