[Intel-gfx] [PATCH v2 4/8] drm/i915/huc: Load GSC-enabled HuC via DMA xfer if the fuse says so
Daniele Ceraolo Spurio
daniele.ceraolospurio at intel.com
Fri Apr 28 18:58:06 UTC 2023
In the previous patch we extracted the offset of the legacy-style HuC
binary located within the GSC-enabled blob, so now we can use that to
load the HuC via DMA if the fuse is set that way.
Note that we now need to differentiate between "GSC-enabled binary" and
"loaded by GSC", so the former case has been renamed to "MEU binary" for
clarity, while the latter is now based on the fuse instead of the binary
format. This way, all the legacy load paths are automatically taken
(including the auth by GuC) without having to implement further code
changes.
Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio at intel.com>
Cc: Alan Previn <alan.previn.teres.alexis at intel.com>
---
drivers/gpu/drm/i915/gt/uc/intel_huc.c | 27 ++++++++++++++---------
drivers/gpu/drm/i915/gt/uc/intel_huc.h | 4 +++-
drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c | 2 +-
drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c | 14 ++++++------
drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h | 2 +-
5 files changed, 29 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.c b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
index 062ff914b274..c189ede4ef55 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
@@ -298,31 +298,38 @@ void intel_huc_init_early(struct intel_huc *huc)
static int check_huc_loading_mode(struct intel_huc *huc)
{
struct intel_gt *gt = huc_to_gt(huc);
- bool fw_needs_gsc = intel_huc_is_loaded_by_gsc(huc);
- bool hw_uses_gsc = false;
+ bool fw_is_meu = huc->fw.is_meu_binary;
/*
* The fuse for HuC load via GSC is only valid on platforms that have
* GuC deprivilege.
*/
if (HAS_GUC_DEPRIVILEGE(gt->i915))
- hw_uses_gsc = intel_uncore_read(gt->uncore, GUC_SHIM_CONTROL2) &
- GSC_LOADS_HUC;
+ huc->loaded_via_gsc = intel_uncore_read(gt->uncore, GUC_SHIM_CONTROL2) &
+ GSC_LOADS_HUC;
- if (fw_needs_gsc != hw_uses_gsc) {
- huc_err(huc, "mismatch between FW (%s) and HW (%s) load modes\n",
- HUC_LOAD_MODE_STRING(fw_needs_gsc), HUC_LOAD_MODE_STRING(hw_uses_gsc));
+ if (huc->loaded_via_gsc && !fw_is_meu) {
+ huc_err(huc, "HW requires a MEU blob, but we found a legacy one\n");
return -ENOEXEC;
}
- /* make sure we can access the GSC via the mei driver if we need it */
+ /*
+ * Newer meu blobs contain the old FW structure inside. If we found
+ * that, we can use it to load the legacy way.
+ */
+ if (!huc->loaded_via_gsc && fw_is_meu && !huc->fw.dma_start_offset) {
+ huc_err(huc," HW in legacy mode, but we have an incompatible meu blob\n");
+ return -ENOEXEC;
+ }
+
+ /* make sure we can access the GSC if we need it */
if (!(IS_ENABLED(CONFIG_INTEL_MEI_PXP) && IS_ENABLED(CONFIG_INTEL_MEI_GSC)) &&
- fw_needs_gsc) {
+ !HAS_ENGINE(gt, GSC0) && huc->loaded_via_gsc) {
huc_info(huc, "can't load due to missing MEI modules\n");
return -EIO;
}
- huc_dbg(huc, "loaded by GSC = %s\n", str_yes_no(fw_needs_gsc));
+ huc_dbg(huc, "loaded by GSC = %s\n", str_yes_no(huc->loaded_via_gsc));
return 0;
}
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.h b/drivers/gpu/drm/i915/gt/uc/intel_huc.h
index db555b3c1f56..345e1b9aa062 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.h
@@ -39,6 +39,8 @@ struct intel_huc {
struct notifier_block nb;
enum intel_huc_delayed_load_status status;
} delayed_load;
+
+ bool loaded_via_gsc;
};
int intel_huc_sanitize(struct intel_huc *huc);
@@ -73,7 +75,7 @@ static inline bool intel_huc_is_used(struct intel_huc *huc)
static inline bool intel_huc_is_loaded_by_gsc(const struct intel_huc *huc)
{
- return huc->fw.loaded_via_gsc;
+ return huc->loaded_via_gsc;
}
static inline bool intel_huc_wait_required(struct intel_huc *huc)
diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
index f1c973e1c676..88ad2c322c4a 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
@@ -34,7 +34,7 @@ int intel_huc_fw_get_binary_info(struct intel_uc_fw *huc_fw, const void *data, s
size_t min_size = sizeof(*header);
int i;
- if (!huc_fw->loaded_via_gsc) {
+ if (!huc_fw->is_meu_binary) {
huc_err(huc, "Invalid FW type MEU parsing!\n");
return -EINVAL;
}
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 da6fcfe1d80a..3338dd45e78b 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.c
@@ -180,7 +180,7 @@ struct __packed uc_fw_blob {
u8 major;
u8 minor;
u8 patch;
- bool loaded_via_gsc;
+ bool is_meu_binary;
};
#define UC_FW_BLOB_BASE(major_, minor_, patch_, path_) \
@@ -189,9 +189,9 @@ struct __packed uc_fw_blob {
.patch = patch_, \
.path = path_,
-#define UC_FW_BLOB_NEW(major_, minor_, patch_, gsc_, path_) \
+#define UC_FW_BLOB_NEW(major_, minor_, patch_, meu_, path_) \
{ UC_FW_BLOB_BASE(major_, minor_, patch_, path_) \
- .legacy = false, .loaded_via_gsc = gsc_ }
+ .legacy = false, .is_meu_binary = meu_ }
#define UC_FW_BLOB_OLD(major_, minor_, patch_, path_) \
{ UC_FW_BLOB_BASE(major_, minor_, patch_, path_) \
@@ -296,7 +296,7 @@ __uc_fw_auto_select(struct drm_i915_private *i915, struct intel_uc_fw *uc_fw)
uc_fw->file_wanted.path = blob->path;
uc_fw->file_wanted.ver.major = blob->major;
uc_fw->file_wanted.ver.minor = blob->minor;
- uc_fw->loaded_via_gsc = blob->loaded_via_gsc;
+ uc_fw->is_meu_binary = blob->is_meu_binary;
found = true;
break;
}
@@ -680,7 +680,7 @@ static int check_fw_header(struct intel_gt *gt,
if (uc_fw->type == INTEL_UC_FW_TYPE_GSC)
return 0;
- if (uc_fw->loaded_via_gsc)
+ if (uc_fw->is_meu_binary)
err = check_gsc_manifest(gt, fw, uc_fw);
else
err = check_ccs_header(gt, fw, uc_fw);
@@ -929,7 +929,7 @@ static int uc_fw_xfer(struct intel_uc_fw *uc_fw, u32 dst_offset, u32 dma_flags)
intel_uncore_forcewake_get(uncore, FORCEWAKE_ALL);
/* Set the source address for the uCode */
- offset = uc_fw->dummy.start;
+ offset = uc_fw->dummy.start + uc_fw->dma_start_offset;
GEM_BUG_ON(upper_32_bits(offset) & 0xFFFF0000);
intel_uncore_write_fw(uncore, DMA_ADDR_0_LOW, lower_32_bits(offset));
intel_uncore_write_fw(uncore, DMA_ADDR_0_HIGH, upper_32_bits(offset));
@@ -1168,7 +1168,7 @@ size_t intel_uc_fw_copy_rsa(struct intel_uc_fw *uc_fw, void *dst, u32 max_len)
{
struct intel_memory_region *mr = uc_fw->obj->mm.region;
u32 size = min_t(u32, uc_fw->rsa_size, max_len);
- u32 offset = sizeof(struct uc_css_header) + uc_fw->ucode_size;
+ u32 offset = uc_fw->dma_start_offset + sizeof(struct uc_css_header) + uc_fw->ucode_size;
struct sgt_iter iter;
size_t count = 0;
int idx;
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 2691bb6bde48..8f2306627332 100644
--- a/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_uc_fw.h
@@ -115,7 +115,7 @@ struct intel_uc_fw {
u32 dma_start_offset;
- bool loaded_via_gsc;
+ bool is_meu_binary;
};
/*
--
2.40.0
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