[Intel-gfx] [PATCH 3/4] drm/i915: Remove FIXME_lrc_ctx backpointer
Nick Hoath
nicholas.hoath at intel.com
Mon Jan 12 07:33:11 PST 2015
The first pass implementation of execlists required a backpointer to the context to be held
in the intel_ringbuffer. However the context pointer is available higher in the call stack.
Remove the backpointer from the ring buffer structure and instead pass it down through the
call stack.
v2: Integrate this changeset with the removal of duplicate request/execlist queue item members.
v3: Rebase
v4: Rebase. Remove passing of context when the request is passed.
Signed-off-by: Nick Hoath <nicholas.hoath at intel.com>
---
drivers/gpu/drm/i915/i915_gem.c | 5 +--
drivers/gpu/drm/i915/intel_lrc.c | 67 ++++++++++++++++++++-------------
drivers/gpu/drm/i915/intel_lrc.h | 8 +++-
drivers/gpu/drm/i915/intel_ringbuffer.h | 11 ++----
4 files changed, 52 insertions(+), 39 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index e6768d3..0649559 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -2422,8 +2422,7 @@ int __i915_add_request(struct intel_engine_cs *ring,
return -ENOMEM;
if (i915.enable_execlists) {
- struct intel_context *ctx = request->ctx;
- ringbuf = ctx->engine[ring->id].ringbuf;
+ ringbuf = request->ctx->engine[ring->id].ringbuf;
} else
ringbuf = ring->buffer;
@@ -2436,7 +2435,7 @@ int __i915_add_request(struct intel_engine_cs *ring,
* what.
*/
if (i915.enable_execlists) {
- ret = logical_ring_flush_all_caches(ringbuf);
+ ret = logical_ring_flush_all_caches(ringbuf, request->ctx);
if (ret)
return ret;
} else {
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 312b8e8..8275b7a 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -559,6 +559,8 @@ static int execlists_context_queue(struct intel_engine_cs *ring,
if (request == NULL)
return -ENOMEM;
request->ring = ring;
+ } else {
+ WARN_ON(to != request->ctx);
}
request->ctx = to;
request->tail = tail;
@@ -599,7 +601,8 @@ static int execlists_context_queue(struct intel_engine_cs *ring,
return 0;
}
-static int logical_ring_invalidate_all_caches(struct intel_ringbuffer *ringbuf)
+static int logical_ring_invalidate_all_caches(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx)
{
struct intel_engine_cs *ring = ringbuf->ring;
uint32_t flush_domains;
@@ -609,7 +612,8 @@ static int logical_ring_invalidate_all_caches(struct intel_ringbuffer *ringbuf)
if (ring->gpu_caches_dirty)
flush_domains = I915_GEM_GPU_DOMAINS;
- ret = ring->emit_flush(ringbuf, I915_GEM_GPU_DOMAINS, flush_domains);
+ ret = ring->emit_flush(ringbuf, ctx,
+ I915_GEM_GPU_DOMAINS, flush_domains);
if (ret)
return ret;
@@ -618,6 +622,7 @@ static int logical_ring_invalidate_all_caches(struct intel_ringbuffer *ringbuf)
}
static int execlists_move_to_gpu(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
struct list_head *vmas)
{
struct intel_engine_cs *ring = ringbuf->ring;
@@ -645,7 +650,7 @@ static int execlists_move_to_gpu(struct intel_ringbuffer *ringbuf,
/* Unconditionally invalidate gpu caches and ensure that we do flush
* any residual writes from the previous batch.
*/
- return logical_ring_invalidate_all_caches(ringbuf);
+ return logical_ring_invalidate_all_caches(ringbuf, ctx);
}
/**
@@ -725,13 +730,13 @@ int intel_execlists_submission(struct drm_device *dev, struct drm_file *file,
return -EINVAL;
}
- ret = execlists_move_to_gpu(ringbuf, vmas);
+ ret = execlists_move_to_gpu(ringbuf, ctx, vmas);
if (ret)
return ret;
if (ring == &dev_priv->ring[RCS] &&
instp_mode != dev_priv->relative_constants_mode) {
- ret = intel_logical_ring_begin(ringbuf, 4);
+ ret = intel_logical_ring_begin(ringbuf, ctx, 4);
if (ret)
return ret;
@@ -744,7 +749,7 @@ int intel_execlists_submission(struct drm_device *dev, struct drm_file *file,
dev_priv->relative_constants_mode = instp_mode;
}
- ret = ring->emit_bb_start(ringbuf, exec_start, flags);
+ ret = ring->emit_bb_start(ringbuf, ctx, exec_start, flags);
if (ret)
return ret;
@@ -807,7 +812,8 @@ void intel_logical_ring_stop(struct intel_engine_cs *ring)
I915_WRITE_MODE(ring, _MASKED_BIT_DISABLE(STOP_RING));
}
-int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf)
+int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx)
{
struct intel_engine_cs *ring = ringbuf->ring;
int ret;
@@ -815,7 +821,7 @@ int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf)
if (!ring->gpu_caches_dirty)
return 0;
- ret = ring->emit_flush(ringbuf, 0, I915_GEM_GPU_DOMAINS);
+ ret = ring->emit_flush(ringbuf, ctx, 0, I915_GEM_GPU_DOMAINS);
if (ret)
return ret;
@@ -833,10 +839,10 @@ int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf)
* point, the tail *inside* the context is updated and the ELSP written to.
*/
void intel_logical_ring_advance_and_submit(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
struct drm_i915_gem_request *request)
{
struct intel_engine_cs *ring = ringbuf->ring;
- struct intel_context *ctx = ringbuf->FIXME_lrc_ctx;
intel_logical_ring_advance(ringbuf);
@@ -974,6 +980,7 @@ static int logical_ring_wait_request(struct intel_ringbuffer *ringbuf,
}
static int logical_ring_wait_for_space(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
int bytes)
{
struct intel_engine_cs *ring = ringbuf->ring;
@@ -987,7 +994,7 @@ static int logical_ring_wait_for_space(struct intel_ringbuffer *ringbuf,
return ret;
/* Force the context submission in case we have been skipping it */
- intel_logical_ring_advance_and_submit(ringbuf, NULL);
+ intel_logical_ring_advance_and_submit(ringbuf, ctx, NULL);
/* With GEM the hangcheck timer should kick us out of the loop,
* leaving it early runs the risk of corrupting GEM state (due
@@ -1022,13 +1029,14 @@ static int logical_ring_wait_for_space(struct intel_ringbuffer *ringbuf,
return ret;
}
-static int logical_ring_wrap_buffer(struct intel_ringbuffer *ringbuf)
+static int logical_ring_wrap_buffer(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx)
{
uint32_t __iomem *virt;
int rem = ringbuf->size - ringbuf->tail;
if (ringbuf->space < rem) {
- int ret = logical_ring_wait_for_space(ringbuf, rem);
+ int ret = logical_ring_wait_for_space(ringbuf, ctx, rem);
if (ret)
return ret;
@@ -1045,18 +1053,19 @@ static int logical_ring_wrap_buffer(struct intel_ringbuffer *ringbuf)
return 0;
}
-static int logical_ring_prepare(struct intel_ringbuffer *ringbuf, int bytes)
+static int logical_ring_prepare(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx, int bytes)
{
int ret;
if (unlikely(ringbuf->tail + bytes > ringbuf->effective_size)) {
- ret = logical_ring_wrap_buffer(ringbuf);
+ ret = logical_ring_wrap_buffer(ringbuf, ctx);
if (unlikely(ret))
return ret;
}
if (unlikely(ringbuf->space < bytes)) {
- ret = logical_ring_wait_for_space(ringbuf, bytes);
+ ret = logical_ring_wait_for_space(ringbuf, ctx, bytes);
if (unlikely(ret))
return ret;
}
@@ -1077,7 +1086,8 @@ static int logical_ring_prepare(struct intel_ringbuffer *ringbuf, int bytes)
*
* Return: non-zero if the ringbuffer is not ready to be written to.
*/
-int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf, int num_dwords)
+int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx, int num_dwords)
{
struct intel_engine_cs *ring = ringbuf->ring;
struct drm_device *dev = ring->dev;
@@ -1089,12 +1099,12 @@ int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf, int num_dwords)
if (ret)
return ret;
- ret = logical_ring_prepare(ringbuf, num_dwords * sizeof(uint32_t));
+ ret = logical_ring_prepare(ringbuf, ctx, num_dwords * sizeof(uint32_t));
if (ret)
return ret;
/* Preallocate the olr before touching the ring */
- ret = logical_ring_alloc_request(ring, ringbuf->FIXME_lrc_ctx);
+ ret = logical_ring_alloc_request(ring, ctx);
if (ret)
return ret;
@@ -1115,11 +1125,11 @@ static int intel_logical_ring_workarounds_emit(struct intel_engine_cs *ring,
return 0;
ring->gpu_caches_dirty = true;
- ret = logical_ring_flush_all_caches(ringbuf);
+ ret = logical_ring_flush_all_caches(ringbuf, ctx);
if (ret)
return ret;
- ret = intel_logical_ring_begin(ringbuf, w->count * 2 + 2);
+ ret = intel_logical_ring_begin(ringbuf, ctx, w->count * 2 + 2);
if (ret)
return ret;
@@ -1133,7 +1143,7 @@ static int intel_logical_ring_workarounds_emit(struct intel_engine_cs *ring,
intel_logical_ring_advance(ringbuf);
ring->gpu_caches_dirty = true;
- ret = logical_ring_flush_all_caches(ringbuf);
+ ret = logical_ring_flush_all_caches(ringbuf, ctx);
if (ret)
return ret;
@@ -1183,12 +1193,13 @@ static int gen8_init_render_ring(struct intel_engine_cs *ring)
}
static int gen8_emit_bb_start(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
u64 offset, unsigned flags)
{
bool ppgtt = !(flags & I915_DISPATCH_SECURE);
int ret;
- ret = intel_logical_ring_begin(ringbuf, 4);
+ ret = intel_logical_ring_begin(ringbuf, ctx, 4);
if (ret)
return ret;
@@ -1236,6 +1247,7 @@ static void gen8_logical_ring_put_irq(struct intel_engine_cs *ring)
}
static int gen8_emit_flush(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
u32 invalidate_domains,
u32 unused)
{
@@ -1245,7 +1257,7 @@ static int gen8_emit_flush(struct intel_ringbuffer *ringbuf,
uint32_t cmd;
int ret;
- ret = intel_logical_ring_begin(ringbuf, 4);
+ ret = intel_logical_ring_begin(ringbuf, ctx, 4);
if (ret)
return ret;
@@ -1274,6 +1286,7 @@ static int gen8_emit_flush(struct intel_ringbuffer *ringbuf,
}
static int gen8_emit_flush_render(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
u32 invalidate_domains,
u32 flush_domains)
{
@@ -1300,7 +1313,7 @@ static int gen8_emit_flush_render(struct intel_ringbuffer *ringbuf,
flags |= PIPE_CONTROL_GLOBAL_GTT_IVB;
}
- ret = intel_logical_ring_begin(ringbuf, 6);
+ ret = intel_logical_ring_begin(ringbuf, ctx, 6);
if (ret)
return ret;
@@ -1332,7 +1345,7 @@ static int gen8_emit_request(struct intel_ringbuffer *ringbuf,
u32 cmd;
int ret;
- ret = intel_logical_ring_begin(ringbuf, 6);
+ ret = intel_logical_ring_begin(ringbuf, request->ctx, 6);
if (ret)
return ret;
@@ -1348,7 +1361,7 @@ static int gen8_emit_request(struct intel_ringbuffer *ringbuf,
i915_gem_request_get_seqno(ring->outstanding_lazy_request));
intel_logical_ring_emit(ringbuf, MI_USER_INTERRUPT);
intel_logical_ring_emit(ringbuf, MI_NOOP);
- intel_logical_ring_advance_and_submit(ringbuf, request);
+ intel_logical_ring_advance_and_submit(ringbuf, request->ctx, request);
return 0;
}
@@ -1636,6 +1649,7 @@ int intel_lr_context_render_state_init(struct intel_engine_cs *ring,
return 0;
ret = ring->emit_bb_start(ringbuf,
+ ctx,
so.ggtt_offset,
I915_DISPATCH_SECURE);
if (ret)
@@ -1892,7 +1906,6 @@ int intel_lr_context_deferred_create(struct intel_context *ctx,
}
ringbuf->ring = ring;
- ringbuf->FIXME_lrc_ctx = ctx;
ringbuf->size = 32 * PAGE_SIZE;
ringbuf->effective_size = ringbuf->size;
diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h
index 376c307..80a80ea 100644
--- a/drivers/gpu/drm/i915/intel_lrc.h
+++ b/drivers/gpu/drm/i915/intel_lrc.h
@@ -38,9 +38,11 @@ void intel_logical_ring_stop(struct intel_engine_cs *ring);
void intel_logical_ring_cleanup(struct intel_engine_cs *ring);
int intel_logical_rings_init(struct drm_device *dev);
-int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf);
+int logical_ring_flush_all_caches(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx);
void intel_logical_ring_advance_and_submit(
struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
struct drm_i915_gem_request *request);
/**
* intel_logical_ring_advance() - advance the ringbuffer tail
@@ -63,7 +65,9 @@ static inline void intel_logical_ring_emit(struct intel_ringbuffer *ringbuf,
iowrite32(data, ringbuf->virtual_start + ringbuf->tail);
ringbuf->tail += 4;
}
-int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf, int num_dwords);
+int intel_logical_ring_begin(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
+ int num_dwords);
/* Logical Ring Contexts */
int intel_lr_context_render_state_init(struct intel_engine_cs *ring,
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 32aa3f3..714f3fd 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -99,13 +99,6 @@ struct intel_ringbuffer {
struct intel_engine_cs *ring;
- /*
- * FIXME: This backpointer is an artifact of the history of how the
- * execlist patches came into being. It will get removed once the basic
- * code has landed.
- */
- struct intel_context *FIXME_lrc_ctx;
-
u32 head;
u32 tail;
int space;
@@ -123,6 +116,8 @@ struct intel_ringbuffer {
u32 last_retired_head;
};
+struct intel_context;
+
struct intel_engine_cs {
const char *name;
enum intel_ring_id {
@@ -242,9 +237,11 @@ struct intel_engine_cs {
int (*emit_request)(struct intel_ringbuffer *ringbuf,
struct drm_i915_gem_request *request);
int (*emit_flush)(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
u32 invalidate_domains,
u32 flush_domains);
int (*emit_bb_start)(struct intel_ringbuffer *ringbuf,
+ struct intel_context *ctx,
u64 offset, unsigned flags);
/**
--
2.1.1
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