On Thu, May 06, 2021 at 12:13:26PM -0700, Matthew Brost wrote:
> From: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
>
> We can retrieve offsets to cmds buffers and descriptor from
> actual pointers that we already keep locally.
>
> Signed-off-by: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
> Signed-off-by: Matthew Brost <matthew.brost@xxxxxxxxx>
> ---
> drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c | 16 ++++++++++------
> 1 file changed, 10 insertions(+), 6 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> index dbece569fbe4..fbd6bd20f588 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> @@ -244,6 +244,7 @@ int intel_guc_ct_enable(struct intel_guc_ct *ct)
> {
> struct intel_guc *guc = ct_to_guc(ct);
> u32 base, cmds;
> + void *blob;
> int err;
> int i;
>
> @@ -251,15 +252,18 @@ int intel_guc_ct_enable(struct intel_guc_ct *ct)
>
> /* vma should be already allocated and map'ed */
> GEM_BUG_ON(!ct->vma);
> + GEM_BUG_ON(!i915_gem_object_has_pinned_pages(ct->vma->obj));
This doesn't really have anything to do with this patch, but again this
patch will be squashed into a large patch updating the GuC firmware, so
I think this is fine.
With that:
Reviewed-by: Matthew Brost <matthew.brost@xxxxxxxxx>
> base = intel_guc_ggtt_offset(guc, ct->vma);
>
> - /* (re)initialize descriptors
> - * cmds buffers are in the second half of the blob page
> - */
> + /* blob should start with send descriptor */
> + blob = __px_vaddr(ct->vma->obj);
> + GEM_BUG_ON(blob != ct->ctbs[CTB_SEND].desc);
> +
> + /* (re)initialize descriptors */
> for (i = 0; i < ARRAY_SIZE(ct->ctbs); i++) {
> GEM_BUG_ON((i != CTB_SEND) && (i != CTB_RECV));
>
> - cmds = base + PAGE_SIZE / 4 * i + PAGE_SIZE / 2;
> + cmds = base + ptrdiff(ct->ctbs[i].cmds, blob);
> CT_DEBUG(ct, "%d: cmds addr=%#x\n", i, cmds);
>
> guc_ct_buffer_reset(&ct->ctbs[i], cmds);
> @@ -269,12 +273,12 @@ int intel_guc_ct_enable(struct intel_guc_ct *ct)
> * Register both CT buffers starting with RECV buffer.
> * Descriptors are in first half of the blob.
> */
> - err = ct_register_buffer(ct, base + PAGE_SIZE / 4 * CTB_RECV,
> + err = ct_register_buffer(ct, base + ptrdiff(ct->ctbs[CTB_RECV].desc, blob),
> INTEL_GUC_CT_BUFFER_TYPE_RECV);
> if (unlikely(err))
> goto err_out;
>
> - err = ct_register_buffer(ct, base + PAGE_SIZE / 4 * CTB_SEND,
> + err = ct_register_buffer(ct, base + ptrdiff(ct->ctbs[CTB_SEND].desc, blob),
> INTEL_GUC_CT_BUFFER_TYPE_SEND);
> if (unlikely(err))
> goto err_deregister;
> --
> 2.28.0
>
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