Am 04.01.23 um 05:53 schrieb Lazar, Lijo:
On 1/4/2023 3:48 AM, Mario Limonciello wrote:
All microcode runs a basic validation after it's been loaded. Each
IP block as part of init will run both.
Introduce a wrapper for request_firmware and amdgpu_ucode_validate.
This wrapper will also remap any error codes from request_firmware
to -ENODEV. This is so that early_init will fail if firmware couldn't
be loaded instead of the IP block being disabled.
Signed-off-by: Mario Limonciello <mario.limonciello@xxxxxxx>
---
v3-v4:
* New patch
---
drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c | 24 +++++++++++++++++++++++
drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h | 1 +
2 files changed, 25 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
index eafcddce58d3..8c4a7b09e344 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.c
@@ -1312,3 +1312,27 @@ void amdgpu_ucode_ip_version_decode(struct
amdgpu_device *adev, int block_type,
snprintf(ucode_prefix, len, "%s_%d_%d_%d", ip_name, maj, min,
rev);
}
+
+/*
+ * amdgpu_ucode_load - Load and validate amdgpu microcode
+ *
+ * @adev: amdgpu device
+ * @fw: pointer to load firmware to
+ * @fw_name: firmware to load
+ *
+ * This is a helper that will use request_firmware and
amdgpu_ucode_validate
+ * to load and run basic validation on firmware. If the load fails,
remap
+ * the error code to -ENODEV, so that early_init functions will fail
to load.
+ */
+int amdgpu_ucode_load(struct amdgpu_device *adev, const struct
firmware **fw, char *fw_name)
'load' also takes a different meaning of loading firmware to ASIC.
Maybe keep it as 'get' and keep another corresponding common 'put' for
release_firmware?
get/put are usually used for reference counting, how about sticking with
request/release instead? That's used by the underlying functionality as
well IIRC.
Christian.
Thanks,
Lijo
+{
+ int err = request_firmware(fw, fw_name, adev->dev);
+
+ if (err)
+ return -ENODEV;
+ err = amdgpu_ucode_validate(*fw);
+ if (err)
+ dev_dbg(adev->dev, "\"%s\" failed to validate\n", fw_name);
+
+ return err;
+}
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h
b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h
index 552e06929229..b9139fb44506 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h
@@ -544,6 +544,7 @@ void amdgpu_ucode_print_sdma_hdr(const struct
common_firmware_header *hdr);
void amdgpu_ucode_print_psp_hdr(const struct common_firmware_header
*hdr);
void amdgpu_ucode_print_gpu_info_hdr(const struct
common_firmware_header *hdr);
int amdgpu_ucode_validate(const struct firmware *fw);
+int amdgpu_ucode_load(struct amdgpu_device *adev, const struct
firmware **fw, char *fw_name);
bool amdgpu_ucode_hdr_version(union amdgpu_firmware_header *hdr,
uint16_t hdr_major, uint16_t hdr_minor);
