Combine the near identical implementations of intel_logical_ring_begin()
and intel_ring_begin() - the only difference is that the logical wait
has to check for a matching ring (which is assumed by legacy).
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_lrc.c | 141 ++------------------------------
drivers/gpu/drm/i915/intel_lrc.h | 1 -
drivers/gpu/drm/i915/intel_mocs.c | 12 +--
drivers/gpu/drm/i915/intel_ringbuffer.c | 111 +++++++++++++------------
4 files changed, 69 insertions(+), 196 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index dc4fc9d8612c..3d14b69632e8 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -698,48 +698,6 @@ int intel_logical_ring_alloc_request_extras(struct drm_i915_gem_request *request
return 0;
}
-static int logical_ring_wait_for_space(struct drm_i915_gem_request *req,
- int bytes)
-{
- struct intel_ringbuffer *ringbuf = req->ringbuf;
- struct intel_engine_cs *ring = req->ring;
- struct drm_i915_gem_request *target;
- unsigned space;
- int ret;
-
- if (intel_ring_space(ringbuf) >= bytes)
- return 0;
-
- /* The whole point of reserving space is to not wait! */
- WARN_ON(ringbuf->reserved_in_use);
-
- list_for_each_entry(target, &ring->request_list, list) {
- /*
- * The request queue is per-engine, so can contain requests
- * from multiple ringbuffers. Here, we must ignore any that
- * aren't from the ringbuffer we're considering.
- */
- if (target->ringbuf != ringbuf)
- continue;
-
- /* Would completion of this request free enough space? */
- space = __intel_ring_space(target->postfix, ringbuf->tail,
- ringbuf->size);
- if (space >= bytes)
- break;
- }
-
- if (WARN_ON(&target->list == &ring->request_list))
- return -ENOSPC;
-
- ret = i915_wait_request(target);
- if (ret)
- return ret;
-
- ringbuf->space = space;
- return 0;
-}
-
/*
* intel_logical_ring_advance_and_submit() - advance the tail and submit the workload
* @request: Request to advance the logical ringbuffer of.
@@ -763,89 +721,6 @@ intel_logical_ring_advance_and_submit(struct drm_i915_gem_request *request)
execlists_context_queue(request);
}
-static void __wrap_ring_buffer(struct intel_ringbuffer *ringbuf)
-{
- int rem = ringbuf->size - ringbuf->tail;
- memset(ringbuf->virtual_start + ringbuf->tail, 0, rem);
-
- ringbuf->tail = 0;
- intel_ring_update_space(ringbuf);
-}
-
-static int logical_ring_prepare(struct drm_i915_gem_request *req, int bytes)
-{
- struct intel_ringbuffer *ringbuf = req->ringbuf;
- int remain_usable = ringbuf->effective_size - ringbuf->tail;
- int remain_actual = ringbuf->size - ringbuf->tail;
- int ret, total_bytes, wait_bytes = 0;
- bool need_wrap = false;
-
- if (ringbuf->reserved_in_use)
- total_bytes = bytes;
- else
- total_bytes = bytes + ringbuf->reserved_size;
-
- if (unlikely(bytes > remain_usable)) {
- /*
- * Not enough space for the basic request. So need to flush
- * out the remainder and then wait for base + reserved.
- */
- wait_bytes = remain_actual + total_bytes;
- need_wrap = true;
- } else {
- if (unlikely(total_bytes > remain_usable)) {
- /*
- * The base request will fit but the reserved space
- * falls off the end. So only need to to wait for the
- * reserved size after flushing out the remainder.
- */
- wait_bytes = remain_actual + ringbuf->reserved_size;
- need_wrap = true;
- } else if (total_bytes > ringbuf->space) {
- /* No wrapping required, just waiting. */
- wait_bytes = total_bytes;
- }
- }
-
- if (wait_bytes) {
- ret = logical_ring_wait_for_space(req, wait_bytes);
- if (unlikely(ret))
- return ret;
-
- if (need_wrap)
- __wrap_ring_buffer(ringbuf);
- }
-
- return 0;
-}
-
-/**
- * intel_logical_ring_begin() - prepare the logical ringbuffer to accept some commands
- *
- * @req: The request to start some new work for
- * @num_dwords: number of DWORDs that we plan to write to the ringbuffer.
- *
- * The ringbuffer might not be ready to accept the commands right away (maybe it needs to
- * be wrapped, or wait a bit for the tail to be updated). This function takes care of that
- * and also preallocates a request (every workload submission is still mediated through
- * requests, same as it did with legacy ringbuffer submission).
- *
- * Return: non-zero if the ringbuffer is not ready to be written to.
- */
-int intel_logical_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
-{
- int ret;
-
- WARN_ON(req == NULL);
-
- ret = logical_ring_prepare(req, num_dwords * sizeof(uint32_t));
- if (ret)
- return ret;
-
- req->ringbuf->space -= num_dwords * sizeof(uint32_t);
- return 0;
-}
-
int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request)
{
/*
@@ -858,7 +733,7 @@ int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request)
*/
intel_ring_reserved_space_reserve(request->ringbuf, MIN_SPACE_FOR_ADD_REQUEST);
- return intel_logical_ring_begin(request, 0);
+ return intel_ring_begin(request, 0);
}
/**
@@ -928,7 +803,7 @@ int intel_execlists_submission(struct i915_execbuffer_params *params,
if (ring == &dev_priv->ring[RCS] &&
instp_mode != dev_priv->relative_constants_mode) {
- ret = intel_logical_ring_begin(params->request, 4);
+ ret = intel_ring_begin(params->request, 4);
if (ret)
return ret;
@@ -1104,7 +979,7 @@ static int intel_logical_ring_workarounds_emit(struct drm_i915_gem_request *req)
if (ret)
return ret;
- ret = intel_logical_ring_begin(req, w->count * 2 + 2);
+ ret = intel_ring_begin(req, w->count * 2 + 2);
if (ret)
return ret;
@@ -1566,7 +1441,7 @@ static int intel_logical_ring_emit_pdps(struct drm_i915_gem_request *req)
const int num_lri_cmds = GEN8_LEGACY_PDPES * 2;
int i, ret;
- ret = intel_logical_ring_begin(req, num_lri_cmds * 2 + 2);
+ ret = intel_ring_begin(req, num_lri_cmds * 2 + 2);
if (ret)
return ret;
@@ -1611,7 +1486,7 @@ static int gen8_emit_bb_start(struct drm_i915_gem_request *req,
req->ctx->ppgtt->pd_dirty_rings &= ~intel_ring_flag(req->ring);
}
- ret = intel_logical_ring_begin(req, 4);
+ ret = intel_ring_begin(req, 4);
if (ret)
return ret;
@@ -1655,7 +1530,7 @@ static int gen8_emit_flush(struct drm_i915_gem_request *request,
uint32_t cmd;
int ret;
- ret = intel_logical_ring_begin(request, 4);
+ ret = intel_ring_begin(request, 4);
if (ret)
return ret;
@@ -1722,7 +1597,7 @@ static int gen8_emit_flush_render(struct drm_i915_gem_request *request,
vf_flush_wa = true;
}
- ret = intel_logical_ring_begin(request, vf_flush_wa ? 12 : 6);
+ ret = intel_ring_begin(request, vf_flush_wa ? 12 : 6);
if (ret)
return ret;
@@ -1779,7 +1654,7 @@ static int gen8_emit_request(struct drm_i915_gem_request *request)
* used as a workaround for not being allowed to do lite
* restore with HEAD==TAIL (WaIdleLiteRestore).
*/
- ret = intel_logical_ring_begin(request, 8);
+ ret = intel_ring_begin(request, 8);
if (ret)
return ret;
diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h
index 9d4aa699e593..32401e11cebe 100644
--- a/drivers/gpu/drm/i915/intel_lrc.h
+++ b/drivers/gpu/drm/i915/intel_lrc.h
@@ -60,7 +60,6 @@ int intel_logical_ring_reserve_space(struct drm_i915_gem_request *request);
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 intel_logical_ring_begin(struct drm_i915_gem_request *req, int num_dwords);
int logical_ring_flush_all_caches(struct drm_i915_gem_request *req);
diff --git a/drivers/gpu/drm/i915/intel_mocs.c b/drivers/gpu/drm/i915/intel_mocs.c
index d8a7fdc7baeb..5d4f6f3b67cd 100644
--- a/drivers/gpu/drm/i915/intel_mocs.c
+++ b/drivers/gpu/drm/i915/intel_mocs.c
@@ -200,11 +200,9 @@ static int emit_mocs_control_table(struct drm_i915_gem_request *req,
if (WARN_ON(table->size > GEN9_NUM_MOCS_ENTRIES))
return -ENODEV;
- ret = intel_logical_ring_begin(req, 2 + 2 * GEN9_NUM_MOCS_ENTRIES);
- if (ret) {
- DRM_DEBUG("intel_logical_ring_begin failed %d\n", ret);
+ ret = intel_ring_begin(req, 2 + 2 * GEN9_NUM_MOCS_ENTRIES);
+ if (ret)
return ret;
- }
intel_ring_emit(ringbuf, MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES));
@@ -257,11 +255,9 @@ static int emit_mocs_l3cc_table(struct drm_i915_gem_request *req,
if (WARN_ON(table->size > GEN9_NUM_MOCS_ENTRIES))
return -ENODEV;
- ret = intel_logical_ring_begin(req, 2 + GEN9_NUM_MOCS_ENTRIES);
- if (ret) {
- DRM_DEBUG("intel_logical_ring_begin failed %d\n", ret);
+ ret = intel_ring_begin(req, 2 + GEN9_NUM_MOCS_ENTRIES);
+ if (ret)
return ret;
- }
intel_ring_emit(ringbuf,
MI_LOAD_REGISTER_IMM(GEN9_NUM_MOCS_ENTRIES / 2));
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 86c54584f64a..c694f602a0b8 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -2062,46 +2062,6 @@ void intel_cleanup_ring_buffer(struct intel_engine_cs *ring)
ring->dev = NULL;
}
-static int ring_wait_for_space(struct intel_engine_cs *ring, int n)
-{
- struct intel_ringbuffer *ringbuf = ring->buffer;
- struct drm_i915_gem_request *request;
- unsigned space;
- int ret;
-
- if (intel_ring_space(ringbuf) >= n)
- return 0;
-
- /* The whole point of reserving space is to not wait! */
- WARN_ON(ringbuf->reserved_in_use);
-
- list_for_each_entry(request, &ring->request_list, list) {
- space = __intel_ring_space(request->postfix, ringbuf->tail,
- ringbuf->size);
- if (space >= n)
- break;
- }
-
- if (WARN_ON(&request->list == &ring->request_list))
- return -ENOSPC;
-
- ret = i915_wait_request(request);
- if (ret)
- return ret;
-
- ringbuf->space = space;
- return 0;
-}
-
-static void __wrap_ring_buffer(struct intel_ringbuffer *ringbuf)
-{
- int rem = ringbuf->size - ringbuf->tail;
- memset(ringbuf->virtual_start + ringbuf->tail, 0, rem);
-
- ringbuf->tail = 0;
- intel_ring_update_space(ringbuf);
-}
-
int intel_ring_idle(struct intel_engine_cs *ring)
{
struct drm_i915_gem_request *req;
@@ -2188,9 +2148,59 @@ void intel_ring_reserved_space_end(struct intel_ringbuffer *ringbuf)
ringbuf->reserved_in_use = false;
}
-static int __intel_ring_prepare(struct intel_engine_cs *ring, int bytes)
+static int wait_for_space(struct drm_i915_gem_request *req, int bytes)
{
- struct intel_ringbuffer *ringbuf = ring->buffer;
+ struct intel_ringbuffer *ringbuf = req->ringbuf;
+ struct intel_engine_cs *ring = req->ring;
+ struct drm_i915_gem_request *target;
+ unsigned space;
+ int ret;
+
+ if (intel_ring_space(ringbuf) >= bytes)
+ return 0;
+
+ /* The whole point of reserving space is to not wait! */
+ WARN_ON(ringbuf->reserved_in_use);
+
+ list_for_each_entry(target, &ring->request_list, list) {
+ /*
+ * The request queue is per-engine, so can contain requests
+ * from multiple ringbuffers. Here, we must ignore any that
+ * aren't from the ringbuffer we're considering.
+ */
+ if (target->ringbuf != ringbuf)
+ continue;
+
+ /* Would completion of this request free enough space? */
+ space = __intel_ring_space(target->postfix, ringbuf->tail,
+ ringbuf->size);
+ if (space >= bytes)
+ break;
+ }
+
+ if (WARN_ON(&target->list == &ring->request_list))
+ return -ENOSPC;
+
+ ret = i915_wait_request(target);
+ if (ret)
+ return ret;
+
+ ringbuf->space = space;
+ return 0;
+}
+
+static void ring_wrap(struct intel_ringbuffer *ringbuf)
+{
+ int rem = ringbuf->size - ringbuf->tail;
+ memset(ringbuf->virtual_start + ringbuf->tail, 0, rem);
+
+ ringbuf->tail = 0;
+ intel_ring_update_space(ringbuf);
+}
+
+static int ring_prepare(struct drm_i915_gem_request *req, int bytes)
+{
+ struct intel_ringbuffer *ringbuf = req->ringbuf;
int remain_usable = ringbuf->effective_size - ringbuf->tail;
int remain_actual = ringbuf->size - ringbuf->tail;
int ret, total_bytes, wait_bytes = 0;
@@ -2224,33 +2234,26 @@ static int __intel_ring_prepare(struct intel_engine_cs *ring, int bytes)
}
if (wait_bytes) {
- ret = ring_wait_for_space(ring, wait_bytes);
+ ret = wait_for_space(req, wait_bytes);
if (unlikely(ret))
return ret;
if (need_wrap)
- __wrap_ring_buffer(ringbuf);
+ ring_wrap(ringbuf);
}
return 0;
}
-int intel_ring_begin(struct drm_i915_gem_request *req,
- int num_dwords)
+int intel_ring_begin(struct drm_i915_gem_request *req, int num_dwords)
{
- struct intel_engine_cs *ring;
- struct drm_i915_private *dev_priv;
int ret;
- WARN_ON(req == NULL);
- ring = req->ring;
- dev_priv = req->i915;
-
- ret = __intel_ring_prepare(ring, num_dwords * sizeof(uint32_t));
+ ret = ring_prepare(req, num_dwords * sizeof(uint32_t));
if (ret)
return ret;
- ring->buffer->space -= num_dwords * sizeof(uint32_t);
+ req->ringbuf->space -= num_dwords * sizeof(uint32_t);
return 0;
}
--
2.7.0.rc3
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