On 19/04/16 07:49, Chris Wilson wrote:
Rather than reuse the current location of the context in the global GTT,
use its unique ID assigned to it for the lifetime of that context.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/i915_debugfs.c | 12 +++++-------
drivers/gpu/drm/i915/intel_lrc.c | 36 ++++++------------------------------
drivers/gpu/drm/i915/intel_lrc.h | 3 ---
3 files changed, 11 insertions(+), 40 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index cacbe45b7938..bd409bfa6e61 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -2056,15 +2056,13 @@ static void i915_dump_lrc_obj(struct seq_file *m,
struct drm_i915_gem_object *ctx_obj = ctx->engine[engine->id].state;
unsigned long ggtt_offset = 0;
+ seq_printf(m, "CONTEXT: %s %u\n", engine->name, ctx->hw_id);
+
if (ctx_obj == NULL) {
- seq_printf(m, "Context on %s with no gem object\n",
- engine->name);
+ seq_printf(m, "\tNot allocated\n");
Extremely minor - seq_puts.
return;
}
- seq_printf(m, "CONTEXT: %s %u\n", engine->name,
- intel_execlists_ctx_id(ctx, engine));
-
if (!i915_gem_obj_ggtt_bound(ctx_obj))
seq_puts(m, "\tNot bound in GGTT\n");
else
@@ -2183,8 +2181,8 @@ static int i915_execlists(struct seq_file *m, void *data)
seq_printf(m, "\t%d requests in queue\n", count);
if (head_req) {
- seq_printf(m, "\tHead request id: %u\n",
- intel_execlists_ctx_id(head_req->ctx, engine));
+ seq_printf(m, "\tHead request context: %u\n",
+ head_req->ctx->hw_id);
seq_printf(m, "\tHead request tail: %u\n",
head_req->tail);
}
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 72c72bd97568..cec112449b31 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -313,14 +313,12 @@ static void
intel_lr_context_descriptor_update(struct intel_context *ctx,
struct intel_engine_cs *engine)
{
- uint64_t lrca, desc;
+ u64 desc;
- lrca = ctx->engine[engine->id].lrc_vma->node.start +
- LRC_PPHWSP_PN * PAGE_SIZE;
-
- desc = engine->ctx_desc_template; /* bits 0-11 */
- desc |= lrca; /* bits 12-31 */
- desc |= (lrca >> PAGE_SHIFT) << GEN8_CTX_ID_SHIFT; /* bits 32-51 */
+ desc = engine->ctx_desc_template; /* bits 0-11 */
+ desc |= ctx->engine[engine->id].lrc_vma->node.start +
+ LRC_PPHWSP_PN * PAGE_SIZE; /* bits 12-31 */
+ desc |= (u64)ctx->hw_id << GEN8_CTX_ID_SHIFT; /* bits 32-51 */
ctx->engine[engine->id].lrc_desc = desc;
}
@@ -331,28 +329,6 @@ uint64_t intel_lr_context_descriptor(struct intel_context *ctx,
return ctx->engine[engine->id].lrc_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 *engine)
-{
- return intel_lr_context_descriptor(ctx, engine) >> GEN8_CTX_ID_SHIFT;
-}
-
static void execlists_elsp_write(struct drm_i915_gem_request *rq0,
struct drm_i915_gem_request *rq1)
{
@@ -496,7 +472,7 @@ execlists_check_remove_request(struct intel_engine_cs *engine, u32 request_id)
if (!head_req)
return 0;
- if (unlikely(intel_execlists_ctx_id(head_req->ctx, engine) != request_id))
+ if (unlikely(head_req->ctx->hw_id != request_id))
return 0;
WARN(head_req->elsp_submitted == 0, "Never submitted head request\n");
diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h
index 461f1ef9b5c1..b17ab79333aa 100644
--- a/drivers/gpu/drm/i915/intel_lrc.h
+++ b/drivers/gpu/drm/i915/intel_lrc.h
@@ -114,9 +114,6 @@ void intel_lr_context_reset(struct drm_i915_private *dev_priv,
uint64_t intel_lr_context_descriptor(struct intel_context *ctx,
struct intel_engine_cs *engine);
-u32 intel_execlists_ctx_id(struct intel_context *ctx,
- struct intel_engine_cs *engine);
-
/* Execlists */
int intel_sanitize_enable_execlists(struct drm_device *dev, int enable_execlists);
struct i915_execbuffer_params;
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@xxxxxxxxx>
Regards,
Tvrtko
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