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drm/amdgpu: add an option to override IP discovery table from a file

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If you set amdgpu.discovery=2 you can force the the driver to
fetch the IP discovery table from a file rather than from the
table shipped on the device.  This is useful for debugging and
for device bring up and emulation when the tables may be in flux.

Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2021-09-17 11:23:45 -04:00
parent c868d58442
commit a79d3709c4
2 changed files with 21 additions and 5 deletions
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24
drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
View File

@@ -21,6 +21,8 @@
*
*/
#include <linux/firmware.h>
#include "amdgpu.h"
#include "amdgpu_discovery.h"
#include "soc15_hw_ip.h"
@@ -67,6 +69,8 @@
#include "smuio_v11_0_6.h"
#include "smuio_v13_0.h"
MODULE_FIRMWARE("amdgpu/ip_discovery.bin");
#define mmRCC_CONFIG_MEMSIZE 0xde3
#define mmMM_INDEX 0x0
#define mmMM_INDEX_HI 0x6
@@ -206,6 +210,7 @@ static int amdgpu_discovery_init(struct amdgpu_device *adev)
struct binary_header *bhdr;
struct ip_discovery_header *ihdr;
struct gpu_info_header *ghdr;
const struct firmware *fw;
uint16_t offset;
uint16_t size;
uint16_t checksum;
@@ -216,10 +221,21 @@ static int amdgpu_discovery_init(struct amdgpu_device *adev)
if (!adev->mman.discovery_bin)
return -ENOMEM;
r = amdgpu_discovery_read_binary(adev, adev->mman.discovery_bin);
if (r) {
DRM_ERROR("failed to read ip discovery binary\n");
goto out;
if (amdgpu_discovery == 2) {
r = request_firmware(&fw, "amdgpu/ip_discovery.bin", adev->dev);
if (r)
goto get_from_vram;
dev_info(adev->dev, "Using IP discovery from file\n");
memcpy((u8 *)adev->mman.discovery_bin, (u8 *)fw->data,
adev->mman.discovery_tmr_size);
release_firmware(fw);
} else {
get_from_vram:
r = amdgpu_discovery_read_binary(adev, adev->mman.discovery_bin);
if (r) {
DRM_ERROR("failed to read ip discovery binary\n");
goto out;
}
}
bhdr = (struct binary_header *)adev->mman.discovery_bin;

2
drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
View File

@@ -628,7 +628,7 @@ module_param_named(mcbp, amdgpu_mcbp, int, 0444);
/**
* DOC: discovery (int)
* Allow driver to discover hardware IP information from IP Discovery table at the top of VRAM.
* (-1 = auto (default), 0 = disabled, 1 = enabled)
* (-1 = auto (default), 0 = disabled, 1 = enabled, 2 = use ip_discovery table from file)
*/
MODULE_PARM_DESC(discovery,
"Allow driver to discover hardware IPs from IP Discovery table at the top of VRAM");