On Thu, May 06, 2021 at 12:13:25PM -0700, Matthew Brost wrote:
> From: Michal Wajdeczko <michal.wajdeczko@xxxxxxxxx>
>
> In upcoming GuC firmware, CTB size will be removed from the CTB
> descriptor so we must keep it locally for any calculations.
>
> While around, improve some debug messages and helpers.
>
desc->size is still used in the patch and really shouldn't be per this
comment but a patch later in the series drops it. Seeing as this patch
and that patch are going to squashed into a single patch upgrading the
GuC firmware I think that is ok.
With that:
Reviewed-by: Matthew Brost <matthew.brost@xxxxxxxxx>
> 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 | 55 +++++++++++++++++------
> drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h | 2 +
> 2 files changed, 43 insertions(+), 14 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 4cc8c0b71699..dbece569fbe4 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.c
> @@ -90,6 +90,24 @@ static void guc_ct_buffer_desc_init(struct guc_ct_buffer_desc *desc,
> desc->owner = CTB_OWNER_HOST;
> }
>
> +static void guc_ct_buffer_reset(struct intel_guc_ct_buffer *ctb, u32 cmds_addr)
> +{
> + guc_ct_buffer_desc_init(ctb->desc, cmds_addr, ctb->size);
> +}
> +
> +static void guc_ct_buffer_init(struct intel_guc_ct_buffer *ctb,
> + struct guc_ct_buffer_desc *desc,
> + u32 *cmds, u32 size)
> +{
> + GEM_BUG_ON(size % 4);
> +
> + ctb->desc = desc;
> + ctb->cmds = cmds;
> + ctb->size = size;
> +
> + guc_ct_buffer_reset(ctb, 0);
> +}
> +
> static int guc_action_register_ct_buffer(struct intel_guc *guc,
> u32 desc_addr,
> u32 type)
> @@ -148,7 +166,10 @@ static int ct_deregister_buffer(struct intel_guc_ct *ct, u32 type)
> int intel_guc_ct_init(struct intel_guc_ct *ct)
> {
> struct intel_guc *guc = ct_to_guc(ct);
> + struct guc_ct_buffer_desc *desc;
> + u32 blob_size;
> void *blob;
> + u32 *cmds;
> int err;
> int i;
>
> @@ -176,19 +197,24 @@ int intel_guc_ct_init(struct intel_guc_ct *ct)
> * other code will need updating as well.
> */
>
> - err = intel_guc_allocate_and_map_vma(guc, PAGE_SIZE, &ct->vma, &blob);
> + blob_size = PAGE_SIZE;
> + err = intel_guc_allocate_and_map_vma(guc, blob_size, &ct->vma, &blob);
> if (unlikely(err)) {
> - CT_ERROR(ct, "Failed to allocate CT channel (err=%d)\n", err);
> + CT_PROBE_ERROR(ct, "Failed to allocate %u for CTB data (%pe)\n",
> + blob_size, ERR_PTR(err));
> return err;
> }
>
> - CT_DEBUG(ct, "vma base=%#x\n", intel_guc_ggtt_offset(guc, ct->vma));
> + CT_DEBUG(ct, "base=%#x size=%u\n", intel_guc_ggtt_offset(guc, ct->vma), blob_size);
>
> /* store pointers to desc and cmds */
> for (i = 0; i < ARRAY_SIZE(ct->ctbs); i++) {
> GEM_BUG_ON((i != CTB_SEND) && (i != CTB_RECV));
> - ct->ctbs[i].desc = blob + PAGE_SIZE/4 * i;
> - ct->ctbs[i].cmds = blob + PAGE_SIZE/4 * i + PAGE_SIZE/2;
> +
> + desc = blob + PAGE_SIZE / 4 * i;
> + cmds = blob + PAGE_SIZE / 4 * i + PAGE_SIZE / 2;
> +
> + guc_ct_buffer_init(&ct->ctbs[i], desc, cmds, PAGE_SIZE / 4);
> }
>
> return 0;
> @@ -217,7 +243,7 @@ void intel_guc_ct_fini(struct intel_guc_ct *ct)
> int intel_guc_ct_enable(struct intel_guc_ct *ct)
> {
> struct intel_guc *guc = ct_to_guc(ct);
> - u32 base, cmds, size;
> + u32 base, cmds;
> int err;
> int i;
>
> @@ -232,10 +258,11 @@ int intel_guc_ct_enable(struct intel_guc_ct *ct)
> */
> 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;
> - size = PAGE_SIZE / 4;
> - CT_DEBUG(ct, "%d: addr=%#x size=%u\n", i, cmds, size);
> - guc_ct_buffer_desc_init(ct->ctbs[i].desc, cmds, size);
> + CT_DEBUG(ct, "%d: cmds addr=%#x\n", i, cmds);
> +
> + guc_ct_buffer_reset(&ct->ctbs[i], cmds);
> }
>
> /*
> @@ -259,7 +286,7 @@ int intel_guc_ct_enable(struct intel_guc_ct *ct)
> err_deregister:
> ct_deregister_buffer(ct, INTEL_GUC_CT_BUFFER_TYPE_RECV);
> err_out:
> - CT_PROBE_ERROR(ct, "Failed to open channel (err=%d)\n", err);
> + CT_PROBE_ERROR(ct, "Failed to enable CTB (%pe)\n", ERR_PTR(err));
> return err;
> }
>
> @@ -314,7 +341,7 @@ static int ct_write(struct intel_guc_ct *ct,
> struct guc_ct_buffer_desc *desc = ctb->desc;
> u32 head = desc->head;
> u32 tail = desc->tail;
> - u32 size = desc->size;
> + u32 size = ctb->size;
> u32 used;
> u32 header;
> u32 *cmds = ctb->cmds;
> @@ -323,7 +350,7 @@ static int ct_write(struct intel_guc_ct *ct,
> if (unlikely(desc->is_in_error))
> return -EPIPE;
>
> - if (unlikely(!IS_ALIGNED(head | tail | size, 4) ||
> + if (unlikely(!IS_ALIGNED(head | tail, 4) ||
> (tail | head) >= size))
> goto corrupted;
>
> @@ -530,7 +557,7 @@ static int ct_read(struct intel_guc_ct *ct, u32 *data)
> struct guc_ct_buffer_desc *desc = ctb->desc;
> u32 head = desc->head;
> u32 tail = desc->tail;
> - u32 size = desc->size;
> + u32 size = ctb->size;
> u32 *cmds = ctb->cmds;
> s32 available;
> unsigned int len;
> @@ -539,7 +566,7 @@ static int ct_read(struct intel_guc_ct *ct, u32 *data)
> if (unlikely(desc->is_in_error))
> return -EPIPE;
>
> - if (unlikely(!IS_ALIGNED(head | tail | size, 4) ||
> + if (unlikely(!IS_ALIGNED(head | tail, 4) ||
> (tail | head) >= size))
> goto corrupted;
>
> diff --git a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h
> index 494a51a5200f..4009e2dd0de4 100644
> --- a/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h
> +++ b/drivers/gpu/drm/i915/gt/uc/intel_guc_ct.h
> @@ -29,10 +29,12 @@ struct intel_guc;
> *
> * @desc: pointer to the buffer descriptor
> * @cmds: pointer to the commands buffer
> + * @size: size of the commands buffer
> */
> struct intel_guc_ct_buffer {
> struct guc_ct_buffer_desc *desc;
> u32 *cmds;
> + u32 size;
> };
>
>
> --
> 2.28.0
>
