drm/i915/huc: Copy huc rsa only once

The binary is perma-pinned and the rsa is not going to change, so copy
it only once and not on every load.

v2: onion unwind (Chris)

Signed-off-by: Daniele Ceraolo Spurio <daniele.ceraolospurio@intel.com>
Cc: Fernando Pacheco <fernando.pacheco@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> #v1
Reviewed-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20190725001813.4740-7-daniele.ceraolospurio@intel.com

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.c b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
index a45976e..c9535ca 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.c
@@ -50,6 +50,7 @@ static int intel_huc_rsa_data_create(struct intel_huc *huc)
        struct intel_gt *gt = huc_to_gt(huc);
        struct intel_guc *guc = &gt->uc.guc;
        struct i915_vma *vma;
+       size_t copied;
        void *vaddr;
 
        /*
@@ -62,6 +63,7 @@ static int intel_huc_rsa_data_create(struct intel_huc *huc)
         * the authentication since its GGTT offset will be GuC
         * accessible.
         */
+       GEM_BUG_ON(huc->fw.rsa_size > PAGE_SIZE);
        vma = intel_guc_allocate_vma(guc, PAGE_SIZE);
        if (IS_ERR(vma))
                return PTR_ERR(vma);
@@ -72,26 +74,43 @@ static int intel_huc_rsa_data_create(struct intel_huc *huc)
                return PTR_ERR(vaddr);
        }
 
+       copied = intel_uc_fw_copy_rsa(&huc->fw, vaddr, vma->size);
+       GEM_BUG_ON(copied < huc->fw.rsa_size);
+
+       i915_gem_object_unpin_map(vma->obj);
+
        huc->rsa_data = vma;
-       huc->rsa_data_vaddr = vaddr;
 
        return 0;
 }
 
 static void intel_huc_rsa_data_destroy(struct intel_huc *huc)
 {
-       i915_vma_unpin_and_release(&huc->rsa_data, I915_VMA_RELEASE_MAP);
+       i915_vma_unpin_and_release(&huc->rsa_data, 0);
 }
 
 int intel_huc_init(struct intel_huc *huc)
 {
        int err;
 
-       err = intel_huc_rsa_data_create(huc);
+       err = intel_uc_fw_init(&huc->fw);
        if (err)
                return err;
 
-       return intel_uc_fw_init(&huc->fw);
+       /*
+        * HuC firmware image is outside GuC accessible range.
+        * Copy the RSA signature out of the image into
+        * a perma-pinned region set aside for it
+        */
+       err = intel_huc_rsa_data_create(huc);
+       if (err)
+               goto out_fini;
+
+       return 0;
+
+out_fini:
+       intel_uc_fw_fini(&huc->fw);
+       return err;
 }
 
 void intel_huc_fini(struct intel_huc *huc)

diff --git a/drivers/gpu/drm/i915/gt/uc/intel_huc.h b/drivers/gpu/drm/i915/gt/uc/intel_huc.h
index ea340f8..4465209 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc.h
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc.h
@@ -35,7 +35,6 @@ struct intel_huc {
 
        /* HuC-specific additions */
        struct i915_vma *rsa_data;
-       void *rsa_data_vaddr;
 
        struct {
                i915_reg_t reg;

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 4725688..7d2d2eb 100644 (file)
--- a/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
+++ b/drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
@@ -34,21 +34,6 @@ void intel_huc_fw_init_early(struct intel_huc *huc)
        intel_uc_fw_init_early(&huc->fw, INTEL_UC_FW_TYPE_HUC, huc_to_gt(huc)->i915);
 }
 
-static void huc_xfer_rsa(struct intel_huc *huc)
-{
-       size_t copied;
-
-       /*
-        * HuC firmware image is outside GuC accessible range.
-        * Copy the RSA signature out of the image into
-        * the perma-pinned region set aside for it
-        */
-       GEM_BUG_ON(huc->fw.rsa_size > huc->rsa_data->size);
-       copied = intel_uc_fw_copy_rsa(&huc->fw, huc->rsa_data_vaddr,
-                                     huc->rsa_data->size);
-       GEM_BUG_ON(copied < huc->fw.rsa_size);
-}
-
 static int huc_xfer_ucode(struct intel_huc *huc)
 {
        struct intel_uc_fw *huc_fw = &huc->fw;
@@ -108,8 +93,6 @@ static int huc_fw_xfer(struct intel_uc_fw *huc_fw)
 {
        struct intel_huc *huc = container_of(huc_fw, struct intel_huc, fw);
 
-       huc_xfer_rsa(huc);
-
        return huc_xfer_ucode(huc);
 }