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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
This commit is contained in:
Daniele Ceraolo Spurio 2019-07-24 17:18:11 -07:00 committed by Chris Wilson
parent 90dd992260
commit 9cb2794557
3 changed files with 23 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/gpu/drm/i915/gt/uc/intel_huc.c
View File

@ -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)

1
drivers/gpu/drm/i915/gt/uc/intel_huc.h
View File

@ -35,7 +35,6 @@ struct intel_huc {
/* HuC-specific additions */
struct i915_vma *rsa_data;
void *rsa_data_vaddr;
struct {
i915_reg_t reg;

17
drivers/gpu/drm/i915/gt/uc/intel_huc_fw.c
View File

@ -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);
}