}
static void i915_dump_lrc_obj(struct seq_file *m,
- struct intel_engine_cs *ring,
- struct drm_i915_gem_object *ctx_obj)
+ struct intel_context *ctx,
+ struct intel_engine_cs *ring)
{
struct page *page;
uint32_t *reg_state;
int j;
+ struct drm_i915_gem_object *ctx_obj = ctx->engine[ring->id].state;
unsigned long ggtt_offset = 0;
if (ctx_obj == NULL) {
}
seq_printf(m, "CONTEXT: %s %u\n", ring->name,
- intel_execlists_ctx_id(ctx_obj));
+ intel_execlists_ctx_id(ctx, ring));
if (!i915_gem_obj_ggtt_bound(ctx_obj))
seq_puts(m, "\tNot bound in GGTT\n");
list_for_each_entry(ctx, &dev_priv->context_list, link) {
for_each_ring(ring, dev_priv, i) {
if (ring->default_context != ctx)
- i915_dump_lrc_obj(m, ring,
- ctx->engine[i].state);
+ i915_dump_lrc_obj(m, ctx, ring);
}
}
seq_printf(m, "\t%d requests in queue\n", count);
if (head_req) {
- struct drm_i915_gem_object *ctx_obj;
-
- ctx_obj = head_req->ctx->engine[ring_id].state;
seq_printf(m, "\tHead request id: %u\n",
- intel_execlists_ctx_id(ctx_obj));
+ intel_execlists_ctx_id(head_req->ctx, ring));
seq_printf(m, "\tHead request tail: %u\n",
head_req->tail);
}
return 0;
}
+static void
+logical_ring_init_platform_invariants(struct intel_engine_cs *ring)
+{
+ struct drm_device *dev = ring->dev;
+
+ ring->disable_lite_restore_wa = (IS_SKL_REVID(dev, 0, SKL_REVID_B0) ||
+ IS_BXT_REVID(dev, 0, BXT_REVID_A1)) &&
+ (ring->id == VCS || ring->id == VCS2);
+
+ ring->ctx_desc_template = GEN8_CTX_VALID;
+ ring->ctx_desc_template |= GEN8_CTX_ADDRESSING_MODE(dev) <<
+ GEN8_CTX_ADDRESSING_MODE_SHIFT;
+ if (IS_GEN8(dev))
+ ring->ctx_desc_template |= GEN8_CTX_L3LLC_COHERENT;
+ ring->ctx_desc_template |= GEN8_CTX_PRIVILEGE;
+
+ /* TODO: WaDisableLiteRestore when we start using semaphore
+ * signalling between Command Streamers */
+ /* ring->ctx_desc_template |= GEN8_CTX_FORCE_RESTORE; */
+
+ /* WaEnableForceRestoreInCtxtDescForVCS:skl */
+ /* WaEnableForceRestoreInCtxtDescForVCS:bxt */
+ if (ring->disable_lite_restore_wa)
+ ring->ctx_desc_template |= GEN8_CTX_FORCE_RESTORE;
+}
+
/**
- * intel_execlists_ctx_id() - get the Execlists Context ID
- * @ctx_obj: Logical Ring Context backing object.
+ * intel_lr_context_descriptor_update() - calculate & cache the descriptor
+ * descriptor for a pinned context
*
- * Do not confuse with ctx->id! Unfortunately we have a name overload
- * here: the old context ID we pass to userspace as a handler so that
- * they can refer to a context, and the new context ID we pass to the
- * ELSP so that the GPU can inform us of the context status via
- * interrupts.
+ * @ctx: Context to work on
+ * @ring: Engine the descriptor will be used with
*
- * Return: 20-bits globally unique context ID.
+ * The context descriptor encodes various attributes of a context,
+ * including its GTT address and some flags. Because it's fairly
+ * expensive to calculate, we'll just do it once and cache the result,
+ * which remains valid until the context is unpinned.
+ *
+ * This is what a descriptor looks like, from LSB to MSB:
+ * bits 0-11: flags, GEN8_CTX_* (cached in ctx_desc_template)
+ * bits 12-31: LRCA, GTT address of (the HWSP of) this context
+ * bits 32-51: ctx ID, a globally unique tag (the LRCA again!)
+ * bits 52-63: reserved, may encode the engine ID (for GuC)
*/
-u32 intel_execlists_ctx_id(struct drm_i915_gem_object *ctx_obj)
+static void
+intel_lr_context_descriptor_update(struct intel_context *ctx,
+ struct intel_engine_cs *ring)
{
- u32 lrca = i915_gem_obj_ggtt_offset(ctx_obj) +
- LRC_PPHWSP_PN * PAGE_SIZE;
+ uint64_t lrca, desc;
- /* LRCA is required to be 4K aligned so the more significant 20 bits
- * are globally unique */
- return lrca >> 12;
-}
+ lrca = ctx->engine[ring->id].lrc_vma->node.start +
+ LRC_PPHWSP_PN * PAGE_SIZE;
-static bool disable_lite_restore_wa(struct intel_engine_cs *ring)
-{
- struct drm_device *dev = ring->dev;
+ desc = ring->ctx_desc_template; /* bits 0-11 */
+ desc |= lrca; /* bits 12-31 */
+ desc |= (lrca >> PAGE_SHIFT) << GEN8_CTX_ID_SHIFT; /* bits 32-51 */
- return (IS_SKL_REVID(dev, 0, SKL_REVID_B0) ||
- IS_BXT_REVID(dev, 0, BXT_REVID_A1)) &&
- (ring->id == VCS || ring->id == VCS2);
+ ctx->engine[ring->id].lrc_desc = desc;
}
uint64_t intel_lr_context_descriptor(struct intel_context *ctx,
struct intel_engine_cs *ring)
{
- struct drm_i915_gem_object *ctx_obj = ctx->engine[ring->id].state;
- uint64_t desc;
- uint64_t lrca = i915_gem_obj_ggtt_offset(ctx_obj) +
- LRC_PPHWSP_PN * PAGE_SIZE;
-
- WARN_ON(lrca & 0xFFFFFFFF00000FFFULL);
-
- desc = GEN8_CTX_VALID;
- desc |= GEN8_CTX_ADDRESSING_MODE(dev) << GEN8_CTX_ADDRESSING_MODE_SHIFT;
- if (IS_GEN8(ctx_obj->base.dev))
- desc |= GEN8_CTX_L3LLC_COHERENT;
- desc |= GEN8_CTX_PRIVILEGE;
- desc |= lrca;
- desc |= (u64)intel_execlists_ctx_id(ctx_obj) << GEN8_CTX_ID_SHIFT;
-
- /* TODO: WaDisableLiteRestore when we start using semaphore
- * signalling between Command Streamers */
- /* desc |= GEN8_CTX_FORCE_RESTORE; */
-
- /* WaEnableForceRestoreInCtxtDescForVCS:skl */
- /* WaEnableForceRestoreInCtxtDescForVCS:bxt */
- if (disable_lite_restore_wa(ring))
- desc |= GEN8_CTX_FORCE_RESTORE;
+ return ctx->engine[ring->id].lrc_desc;
+}
- return desc;
+/**
+ * intel_execlists_ctx_id() - get the Execlists Context ID
+ * @ctx: Context to get the ID for
+ * @ring: Engine to get the ID for
+ *
+ * Do not confuse with ctx->id! Unfortunately we have a name overload
+ * here: the old context ID we pass to userspace as a handler so that
+ * they can refer to a context, and the new context ID we pass to the
+ * ELSP so that the GPU can inform us of the context status via
+ * interrupts.
+ *
+ * The context ID is a portion of the context descriptor, so we can
+ * just extract the required part from the cached descriptor.
+ *
+ * Return: 20-bits globally unique context ID.
+ */
+u32 intel_execlists_ctx_id(struct intel_context *ctx,
+ struct intel_engine_cs *ring)
+{
+ return intel_lr_context_descriptor(ctx, ring) >> GEN8_CTX_ID_SHIFT;
}
static void execlists_elsp_write(struct drm_i915_gem_request *rq0,
uint32_t *reg_state;
BUG_ON(!ctx_obj);
- WARN_ON(!i915_gem_obj_is_pinned(ctx_obj));
- WARN_ON(!i915_gem_obj_is_pinned(rb_obj));
page = i915_gem_object_get_dirty_page(ctx_obj, LRC_STATE_PN);
reg_state = kmap_atomic(page);
execlist_link);
if (head_req != NULL) {
- struct drm_i915_gem_object *ctx_obj =
- head_req->ctx->engine[ring->id].state;
- if (intel_execlists_ctx_id(ctx_obj) == request_id) {
+ if (intel_execlists_ctx_id(head_req->ctx, ring) == request_id) {
WARN(head_req->elsp_submitted == 0,
"Never submitted head request\n");
}
}
- if (disable_lite_restore_wa(ring)) {
+ if (ring->disable_lite_restore_wa) {
/* Prevent a ctx to preempt itself */
if ((status & GEN8_CTX_STATUS_ACTIVE_IDLE) &&
(submit_contexts != 0))
}
static int intel_lr_context_do_pin(struct intel_engine_cs *ring,
- struct drm_i915_gem_object *ctx_obj,
- struct intel_ringbuffer *ringbuf)
+ struct intel_context *ctx)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
- int ret = 0;
+ struct drm_i915_gem_object *ctx_obj = ctx->engine[ring->id].state;
+ struct intel_ringbuffer *ringbuf = ctx->engine[ring->id].ringbuf;
+ int ret;
WARN_ON(!mutex_is_locked(&ring->dev->struct_mutex));
+
ret = i915_gem_obj_ggtt_pin(ctx_obj, GEN8_LR_CONTEXT_ALIGN,
PIN_OFFSET_BIAS | GUC_WOPCM_TOP);
if (ret)
if (ret)
goto unpin_ctx_obj;
+ ctx->engine[ring->id].lrc_vma = i915_gem_obj_to_ggtt(ctx_obj);
+ intel_lr_context_descriptor_update(ctx, ring);
ctx_obj->dirty = true;
/* Invalidate GuC TLB. */
{
int ret = 0;
struct intel_engine_cs *ring = rq->ring;
- struct drm_i915_gem_object *ctx_obj = rq->ctx->engine[ring->id].state;
- struct intel_ringbuffer *ringbuf = rq->ringbuf;
if (rq->ctx->engine[ring->id].pin_count++ == 0) {
- ret = intel_lr_context_do_pin(ring, ctx_obj, ringbuf);
+ ret = intel_lr_context_do_pin(ring, rq->ctx);
if (ret)
goto reset_pin_count;
}
if (--rq->ctx->engine[ring->id].pin_count == 0) {
intel_unpin_ringbuffer_obj(ringbuf);
i915_gem_object_ggtt_unpin(ctx_obj);
+ rq->ctx->engine[ring->id].lrc_vma = NULL;
+ rq->ctx->engine[ring->id].lrc_desc = 0;
}
}
}
ring->status_page.obj = NULL;
}
+ ring->disable_lite_restore_wa = false;
+ ring->ctx_desc_template = 0;
+
lrc_destroy_wa_ctx_obj(ring);
ring->dev = NULL;
}
INIT_LIST_HEAD(&ring->execlist_retired_req_list);
spin_lock_init(&ring->execlist_lock);
+ logical_ring_init_platform_invariants(ring);
+
ret = i915_cmd_parser_init_ring(ring);
if (ret)
goto error;
goto error;
/* As this is the default context, always pin it */
- ret = intel_lr_context_do_pin(
- ring,
- ring->default_context->engine[ring->id].state,
- ring->default_context->engine[ring->id].ringbuf);
+ ret = intel_lr_context_do_pin(ring, ring->default_context);
if (ret) {
DRM_ERROR(
"Failed to pin and map ringbuffer %s: %d\n",
projects / linux-beck.git / commitdiff