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-rw-r--r--drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c99
-rw-r--r--drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h2
-rw-r--r--drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h9
3 files changed, 72 insertions, 38 deletions
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
index d078f884b5e3..9361532726d6 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
@@ -301,45 +301,31 @@ static void __force_fw_fetch_failures(struct intel_uc_fw *uc_fw, int e)
}
}
-/**
- * intel_uc_fw_fetch - fetch uC firmware
- * @uc_fw: uC firmware
- *
- * Fetch uC firmware into GEM obj.
- *
- * Return: 0 on success, a negative errno code on failure.
- */
-int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
+static int check_gsc_manifest(const struct firmware *fw,
+ struct intel_uc_fw *uc_fw)
{
- struct drm_i915_private *i915 = __uc_fw_to_gt(uc_fw)->i915;
- struct device *dev = i915->drm.dev;
- struct drm_i915_gem_object *obj;
- const struct firmware *fw = NULL;
- struct uc_css_header *css;
- size_t size;
- int err;
+ u32 *dw = (u32 *)fw->data;
+ u32 version = dw[HUC_GSC_VERSION_DW];
- GEM_BUG_ON(!i915->wopcm.size);
- GEM_BUG_ON(!intel_uc_fw_is_enabled(uc_fw));
-
- err = i915_inject_probe_error(i915, -ENXIO);
- if (err)
- goto fail;
+ uc_fw->major_ver_found = FIELD_GET(HUC_GSC_MAJOR_VER_MASK, version);
+ uc_fw->minor_ver_found = FIELD_GET(HUC_GSC_MINOR_VER_MASK, version);
- __force_fw_fetch_failures(uc_fw, -EINVAL);
- __force_fw_fetch_failures(uc_fw, -ESTALE);
+ return 0;
+}
- err = request_firmware(&fw, uc_fw->path, dev);
- if (err)
- goto fail;
+static int check_ccs_header(struct drm_i915_private *i915,
+ const struct firmware *fw,
+ struct intel_uc_fw *uc_fw)
+{
+ struct uc_css_header *css;
+ size_t size;
/* Check the size of the blob before examining buffer contents */
if (unlikely(fw->size < sizeof(struct uc_css_header))) {
drm_warn(&i915->drm, "%s firmware %s: invalid size: %zu < %zu\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path,
fw->size, sizeof(struct uc_css_header));
- err = -ENODATA;
- goto fail;
+ return -ENODATA;
}
css = (struct uc_css_header *)fw->data;
@@ -352,8 +338,7 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
"%s firmware %s: unexpected header size: %zu != %zu\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path,
fw->size, sizeof(struct uc_css_header));
- err = -EPROTO;
- goto fail;
+ return -EPROTO;
}
/* uCode size must calculated from other sizes */
@@ -368,8 +353,7 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
drm_warn(&i915->drm, "%s firmware %s: invalid size: %zu < %zu\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path,
fw->size, size);
- err = -ENOEXEC;
- goto fail;
+ return -ENOEXEC;
}
/* Sanity check whether this fw is not larger than whole WOPCM memory */
@@ -378,8 +362,7 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
drm_warn(&i915->drm, "%s firmware %s: invalid size: %zu > %zu\n",
intel_uc_fw_type_repr(uc_fw->type), uc_fw->path,
size, (size_t)i915->wopcm.size);
- err = -E2BIG;
- goto fail;
+ return -E2BIG;
}
/* Get version numbers from the CSS header */
@@ -388,6 +371,49 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
uc_fw->minor_ver_found = FIELD_GET(CSS_SW_VERSION_UC_MINOR,
css->sw_version);
+ if (uc_fw->type == INTEL_UC_FW_TYPE_GUC)
+ uc_fw->private_data_size = css->private_data_size;
+
+ return 0;
+}
+
+/**
+ * intel_uc_fw_fetch - fetch uC firmware
+ * @uc_fw: uC firmware
+ *
+ * Fetch uC firmware into GEM obj.
+ *
+ * Return: 0 on success, a negative errno code on failure.
+ */
+int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
+{
+ struct drm_i915_private *i915 = __uc_fw_to_gt(uc_fw)->i915;
+ struct device *dev = i915->drm.dev;
+ struct drm_i915_gem_object *obj;
+ const struct firmware *fw = NULL;
+ int err;
+
+ GEM_BUG_ON(!i915->wopcm.size);
+ GEM_BUG_ON(!intel_uc_fw_is_enabled(uc_fw));
+
+ err = i915_inject_probe_error(i915, -ENXIO);
+ if (err)
+ goto fail;
+
+ __force_fw_fetch_failures(uc_fw, -EINVAL);
+ __force_fw_fetch_failures(uc_fw, -ESTALE);
+
+ err = request_firmware(&fw, uc_fw->path, dev);
+ if (err)
+ goto fail;
+
+ if (uc_fw->loaded_via_gsc)
+ err = check_gsc_manifest(fw, uc_fw);
+ else
+ err = check_ccs_header(i915, fw, uc_fw);
+ if (err)
+ goto fail;
+
if (uc_fw->major_ver_found != uc_fw->major_ver_wanted ||
uc_fw->minor_ver_found < uc_fw->minor_ver_wanted) {
drm_notice(&i915->drm, "%s firmware %s: unexpected version: %u.%u != %u.%u\n",
@@ -400,9 +426,6 @@ int intel_uc_fw_fetch(struct intel_uc_fw *uc_fw)
}
}
- if (uc_fw->type == INTEL_UC_FW_TYPE_GUC)
- uc_fw->private_data_size = css->private_data_size;
-
if (HAS_LMEM(i915)) {
obj = i915_gem_object_create_lmem_from_data(i915, fw->data, fw->size);
if (!IS_ERR(obj))
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
index 3229018877d3..4f169035f504 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
@@ -102,6 +102,8 @@ struct intel_uc_fw {
u32 ucode_size;
u32 private_data_size;
+
+ bool loaded_via_gsc;
};
#ifdef CONFIG_DRM_I915_DEBUG_GUC
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h
index e41ffc7a7fbc..b05e0e35b734 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw_abi.h
@@ -39,6 +39,11 @@
* 3. Length info of each component can be found in header, in dwords.
* 4. Modulus and exponent key are not required by driver. They may not appear
* in fw. So driver will load a truncated firmware in this case.
+ *
+ * Starting from DG2, the HuC is loaded by the GSC instead of i915. The GSC
+ * firmware performs all the required integrity checks, we just need to check
+ * the version. Note that the header for GSC-managed blobs is different from the
+ * CSS used for dma-loaded firmwares.
*/
struct uc_css_header {
@@ -78,4 +83,8 @@ struct uc_css_header {
} __packed;
static_assert(sizeof(struct uc_css_header) == 128);
+#define HUC_GSC_VERSION_DW 44
+#define HUC_GSC_MAJOR_VER_MASK (0xFF << 0)
+#define HUC_GSC_MINOR_VER_MASK (0xFF << 16)
+
#endif /* _INTEL_UC_FW_ABI_H */
generated by cgit v1.2.3 (git 2.39.0) at 2025-01-31 19:34:13 +0300