Extend init/init_hw split to context init.
- Move context initialisation in to i915_gem_init_hw
- Move one off initialisation for render ring to
i915_gem_validate_context
- Move default context initialisation to logical_ring_init
Rename intel_lr_context_deferred_create to
intel_lr_context_deferred_alloc, to reflect reduced functionality &
alloc/init split.
This patch is intended to split out the allocation of resources &
initialisation to allow easier reuse of code for resume/gpu reset.
v2: Removed function ptr wrapping of do_switch_context (Daniel Vetter)
Left ->init_context int intel_lr_context_deferred_alloc
(Daniel Vetter)
Remove unnecessary init flag & ring type test. (Daniel Vetter)
Improve commit message (Daniel Vetter)
v3: On init/reinit, set the hw next sequence number to the sw next
sequence number. This is set to 1 at driver load time. This prevents
the seqno being reset on reinit (Chris Wilson)
v4: Set seqno back to ~0 - 0x1000 at start-of-day, and increment by 0x100
on reset.
This makes it obvious which bbs are which after a reset. (David Gordon
& John Harrison)
Rebase.
Issue: VIZ-4798
Signed-off-by: Nick Hoath <nicholas.hoath@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Cc: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: John Harrison <john.c.harrison@xxxxxxxxx>
Cc: David Gordon <david.s.gordon@xxxxxxxxx>
---
drivers/gpu/drm/i915/i915_drv.h | 1 -
drivers/gpu/drm/i915/i915_gem.c | 24 +++--
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 3 +-
drivers/gpu/drm/i915/intel_lrc.c | 155 ++++++++++++++---------------
drivers/gpu/drm/i915/intel_lrc.h | 4 +-
5 files changed, 93 insertions(+), 94 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 1287007..ded7158 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -888,7 +888,6 @@ struct intel_context {
} legacy_hw_ctx;
/* Execlists */
- bool rcs_initialized;
struct {
struct drm_i915_gem_object *state;
struct intel_ringbuffer *ringbuf;
diff --git a/drivers/gpu/drm/i915/i915_gem.c b/drivers/gpu/drm/i915/i915_gem.c
index 41263cd..c8125a5 100644
--- a/drivers/gpu/drm/i915/i915_gem.c
+++ b/drivers/gpu/drm/i915/i915_gem.c
@@ -4613,14 +4613,8 @@ int i915_gem_init_rings(struct drm_device *dev)
goto cleanup_vebox_ring;
}
- ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
- if (ret)
- goto cleanup_bsd2_ring;
-
return 0;
-cleanup_bsd2_ring:
- intel_cleanup_ring_buffer(&dev_priv->ring[VCS2]);
cleanup_vebox_ring:
intel_cleanup_ring_buffer(&dev_priv->ring[VECS]);
cleanup_blt_ring:
@@ -4639,6 +4633,7 @@ i915_gem_init_hw(struct drm_device *dev)
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_engine_cs *ring;
int ret, i, j;
+ struct drm_i915_gem_request *req;
if (INTEL_INFO(dev)->gen < 6 && !intel_enable_gtt())
return -EIO;
@@ -4706,9 +4701,16 @@ i915_gem_init_hw(struct drm_device *dev)
goto out;
}
+ /*
+ * Increment the next seqno by 0x100 so we have a visible break
+ * on re-initialisation
+ */
+ ret = i915_gem_set_seqno(dev, dev_priv->next_seqno+0x100);
+ if (ret)
+ goto out;
+
/* Now it is safe to go back round and do everything else: */
for_each_ring(ring, dev_priv, i) {
- struct drm_i915_gem_request *req;
WARN_ON(!ring->default_context);
@@ -4907,6 +4909,14 @@ i915_gem_load(struct drm_device *dev)
dev_priv->num_fence_regs =
I915_READ(vgtif_reg(avail_rs.fence_num));
+ /*
+ * Set initial sequence number for requests.
+ * Using this number allows the wraparound to happen early,
+ * catching any obvious problems.
+ */
+ dev_priv->next_seqno = ((u32)~0 - 0x1100);
+ dev_priv->last_seqno = ((u32)~0 - 0x1101);
+
/* Initialize fence registers to zero */
INIT_LIST_HEAD(&dev_priv->mm.fence_list);
i915_gem_restore_fences(dev);
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index a953d49..64674dc 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -994,6 +994,7 @@ i915_gem_validate_context(struct drm_device *dev, struct drm_file *file,
{
struct intel_context *ctx = NULL;
struct i915_ctx_hang_stats *hs;
+ int ret;
if (ring->id != RCS && ctx_id != DEFAULT_CONTEXT_HANDLE)
return ERR_PTR(-EINVAL);
@@ -1009,7 +1010,7 @@ i915_gem_validate_context(struct drm_device *dev, struct drm_file *file,
}
if (i915.enable_execlists && !ctx->engine[ring->id].state) {
- int ret = intel_lr_context_deferred_create(ctx, ring);
+ ret = intel_lr_context_deferred_alloc(ctx, ring);
if (ret) {
DRM_DEBUG("Could not create LRC %u: %d\n", ctx_id, ret);
return ERR_PTR(ret);
diff --git a/drivers/gpu/drm/i915/intel_lrc.c b/drivers/gpu/drm/i915/intel_lrc.c
index 28a712e..ebe30a9 100644
--- a/drivers/gpu/drm/i915/intel_lrc.c
+++ b/drivers/gpu/drm/i915/intel_lrc.c
@@ -1445,11 +1445,32 @@ out:
return ret;
}
+static void lrc_setup_hardware_status_page(struct intel_engine_cs *ring,
+ struct drm_i915_gem_object *default_ctx_obj)
+{
+ struct drm_i915_private *dev_priv = ring->dev->dev_private;
+ struct page *page;
+
+ /* The HWSP is part of the default context object in LRC mode. */
+ ring->status_page.gfx_addr = i915_gem_obj_ggtt_offset(default_ctx_obj)
+ + LRC_PPHWSP_PN * PAGE_SIZE;
+ page = i915_gem_object_get_page(default_ctx_obj, LRC_PPHWSP_PN);
+ ring->status_page.page_addr = kmap(page);
+ ring->status_page.obj = default_ctx_obj;
+
+ I915_WRITE(RING_HWS_PGA(ring->mmio_base),
+ (u32)ring->status_page.gfx_addr);
+ POSTING_READ(RING_HWS_PGA(ring->mmio_base));
+}
+
static int gen8_init_common_ring(struct intel_engine_cs *ring)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
+ lrc_setup_hardware_status_page(ring,
+ ring->default_context->engine[ring->id].state);
+
I915_WRITE_IMR(ring, ~(ring->irq_enable_mask | ring->irq_keep_mask));
I915_WRITE(RING_HWSTAM(ring->mmio_base), 0xffffffff);
@@ -1889,8 +1910,33 @@ static int logical_ring_init(struct drm_device *dev, struct intel_engine_cs *rin
if (ret)
return ret;
- ret = intel_lr_context_deferred_create(ring->default_context, ring);
+ ret = intel_lr_context_deferred_alloc(ring->default_context, ring);
+ if (ret)
+ return ret;
+
+ ret = i915_gem_obj_ggtt_pin(
+ ring->default_context->engine[ring->id].state,
+ GEN8_LR_CONTEXT_ALIGN, 0);
+ if (ret) {
+ DRM_DEBUG_DRIVER("Pin LRC backing obj failed: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = intel_pin_and_map_ringbuffer_obj(dev,
+ ring->default_context->engine[ring->id].ringbuf);
+ if (ret) {
+ DRM_ERROR(
+ "Failed to pin and map ringbuffer %s: %d\n",
+ ring->name, ret);
+ goto error_unpin_ggtt;
+ }
+
+ return ret;
+error_unpin_ggtt:
+ i915_gem_object_ggtt_unpin(
+ ring->default_context->engine[ring->id].state);
return ret;
}
@@ -2112,14 +2158,8 @@ int intel_logical_rings_init(struct drm_device *dev)
goto cleanup_vebox_ring;
}
- ret = i915_gem_set_seqno(dev, ((u32)~0 - 0x1000));
- if (ret)
- goto cleanup_bsd2_ring;
-
return 0;
-cleanup_bsd2_ring:
- intel_logical_ring_cleanup(&dev_priv->ring[VCS2]);
cleanup_vebox_ring:
intel_logical_ring_cleanup(&dev_priv->ring[VECS]);
cleanup_blt_ring:
@@ -2370,26 +2410,8 @@ static uint32_t get_lr_context_size(struct intel_engine_cs *ring)
return ret;
}
-static void lrc_setup_hardware_status_page(struct intel_engine_cs *ring,
- struct drm_i915_gem_object *default_ctx_obj)
-{
- struct drm_i915_private *dev_priv = ring->dev->dev_private;
- struct page *page;
-
- /* The HWSP is part of the default context object in LRC mode. */
- ring->status_page.gfx_addr = i915_gem_obj_ggtt_offset(default_ctx_obj)
- + LRC_PPHWSP_PN * PAGE_SIZE;
- page = i915_gem_object_get_page(default_ctx_obj, LRC_PPHWSP_PN);
- ring->status_page.page_addr = kmap(page);
- ring->status_page.obj = default_ctx_obj;
-
- I915_WRITE(RING_HWS_PGA(ring->mmio_base),
- (u32)ring->status_page.gfx_addr);
- POSTING_READ(RING_HWS_PGA(ring->mmio_base));
-}
-
/**
- * intel_lr_context_deferred_create() - create the LRC specific bits of a context
+ * intel_lr_context_deferred_alloc() - create the LRC specific bits of a context
* @ctx: LR context to create.
* @ring: engine to be used with the context.
*
@@ -2401,12 +2423,11 @@ static void lrc_setup_hardware_status_page(struct intel_engine_cs *ring,
*
* Return: non-zero on error.
*/
-int intel_lr_context_deferred_create(struct intel_context *ctx,
+
+int intel_lr_context_deferred_alloc(struct intel_context *ctx,
struct intel_engine_cs *ring)
{
- const bool is_global_default_ctx = (ctx == ring->default_context);
struct drm_device *dev = ring->dev;
- struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_gem_object *ctx_obj;
uint32_t context_size;
struct intel_ringbuffer *ringbuf;
@@ -2426,82 +2447,50 @@ int intel_lr_context_deferred_create(struct intel_context *ctx,
return -ENOMEM;
}
- if (is_global_default_ctx) {
- ret = i915_gem_obj_ggtt_pin(ctx_obj, GEN8_LR_CONTEXT_ALIGN,
- PIN_OFFSET_BIAS | GUC_WOPCM_TOP);
- if (ret) {
- DRM_DEBUG_DRIVER("Pin LRC backing obj failed: %d\n",
- ret);
- drm_gem_object_unreference(&ctx_obj->base);
- return ret;
- }
-
- /* Invalidate GuC TLB. */
- if (i915.enable_guc_submission)
- I915_WRITE(GEN8_GTCR, GEN8_GTCR_INVALIDATE);
- }
-
ringbuf = intel_engine_create_ringbuffer(ring, 4 * PAGE_SIZE);
if (IS_ERR(ringbuf)) {
ret = PTR_ERR(ringbuf);
- goto error_unpin_ctx;
- }
-
- if (is_global_default_ctx) {
- ret = intel_pin_and_map_ringbuffer_obj(dev, ringbuf);
- if (ret) {
- DRM_ERROR(
- "Failed to pin and map ringbuffer %s: %d\n",
- ring->name, ret);
- goto error_ringbuf;
- }
+ goto error_deref_obj;
}
ret = populate_lr_context(ctx, ctx_obj, ring, ringbuf);
if (ret) {
DRM_DEBUG_DRIVER("Failed to populate LRC: %d\n", ret);
- goto error;
+ goto error_ringbuf;
}
ctx->engine[ring->id].ringbuf = ringbuf;
ctx->engine[ring->id].state = ctx_obj;
- if (ctx == ring->default_context)
- lrc_setup_hardware_status_page(ring, ctx_obj);
- else if (ring->id == RCS && !ctx->rcs_initialized) {
- if (ring->init_context) {
- struct drm_i915_gem_request *req;
-
- ret = i915_gem_request_alloc(ring, ctx, &req);
- if (ret)
- return ret;
+ if (ctx != ring->default_context && ring->init_context) {
+ struct drm_i915_gem_request *req;
- ret = ring->init_context(req);
- if (ret) {
- DRM_ERROR("ring init context: %d\n", ret);
- i915_gem_request_cancel(req);
- ctx->engine[ring->id].ringbuf = NULL;
- ctx->engine[ring->id].state = NULL;
- goto error;
- }
-
- i915_add_request_no_flush(req);
+ ret = i915_gem_request_alloc(ring,
+ ring->default_context, &req);
+ if (ret) {
+ DRM_ERROR("ring create req: %d\n",
+ ret);
+ i915_gem_request_cancel(req);
+ goto error_ringbuf;
}
- ctx->rcs_initialized = true;
+ ret = ring->init_context(req);
+ if (ret) {
+ DRM_ERROR("ring init context: %d\n",
+ ret);
+ i915_gem_request_cancel(req);
+ goto error_ringbuf;
+ }
+ i915_add_request_no_flush(req);
}
-
return 0;
-error:
- if (is_global_default_ctx)
- intel_unpin_ringbuffer_obj(ringbuf);
error_ringbuf:
intel_ringbuffer_free(ringbuf);
-error_unpin_ctx:
- if (is_global_default_ctx)
- i915_gem_object_ggtt_unpin(ctx_obj);
+error_deref_obj:
drm_gem_object_unreference(&ctx_obj->base);
+ ctx->engine[ring->id].ringbuf = NULL;
+ ctx->engine[ring->id].state = NULL;
return ret;
}
diff --git a/drivers/gpu/drm/i915/intel_lrc.h b/drivers/gpu/drm/i915/intel_lrc.h
index 4cc54b3..69d99f0 100644
--- a/drivers/gpu/drm/i915/intel_lrc.h
+++ b/drivers/gpu/drm/i915/intel_lrc.h
@@ -75,8 +75,8 @@ static inline void intel_logical_ring_emit(struct intel_ringbuffer *ringbuf,
#define LRC_STATE_PN (LRC_PPHWSP_PN + 1)
void intel_lr_context_free(struct intel_context *ctx);
-int intel_lr_context_deferred_create(struct intel_context *ctx,
- struct intel_engine_cs *ring);
+int intel_lr_context_deferred_alloc(struct intel_context *ctx,
+ struct intel_engine_cs *ring);
void intel_lr_context_unpin(struct drm_i915_gem_request *req);
void intel_lr_context_reset(struct drm_device *dev,
struct intel_context *ctx);
--
2.1.1
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