drm/i915: Enable SandyBridge blitter ring
Based on an original patch by Zhenyu Wang, this initializes the BLT ring for
SandyBridge and enables support for user execbuffers.
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 8da5ff7..a8f408f 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -383,9 +383,9 @@
}
static u32
-bsd_ring_add_request(struct drm_device *dev,
- struct intel_ring_buffer *ring,
- u32 flush_domains)
+ring_add_request(struct drm_device *dev,
+ struct intel_ring_buffer *ring,
+ u32 flush_domains)
{
u32 seqno;
@@ -418,18 +418,18 @@
}
static u32
-bsd_ring_get_seqno(struct drm_device *dev,
- struct intel_ring_buffer *ring)
+ring_status_page_get_seqno(struct drm_device *dev,
+ struct intel_ring_buffer *ring)
{
return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
}
static int
-bsd_ring_dispatch_gem_execbuffer(struct drm_device *dev,
- struct intel_ring_buffer *ring,
- struct drm_i915_gem_execbuffer2 *exec,
- struct drm_clip_rect *cliprects,
- uint64_t exec_offset)
+ring_dispatch_gem_execbuffer(struct drm_device *dev,
+ struct intel_ring_buffer *ring,
+ struct drm_i915_gem_execbuffer2 *exec,
+ struct drm_clip_rect *cliprects,
+ uint64_t exec_offset)
{
uint32_t exec_start;
exec_start = (uint32_t) exec_offset + exec->batch_start_offset;
@@ -441,7 +441,6 @@
return 0;
}
-
static int
render_ring_dispatch_gem_execbuffer(struct drm_device *dev,
struct intel_ring_buffer *ring,
@@ -758,11 +757,11 @@
.init = init_bsd_ring,
.set_tail = ring_set_tail,
.flush = bsd_ring_flush,
- .add_request = bsd_ring_add_request,
- .get_seqno = bsd_ring_get_seqno,
+ .add_request = ring_add_request,
+ .get_seqno = ring_status_page_get_seqno,
.user_irq_get = bsd_ring_get_user_irq,
.user_irq_put = bsd_ring_put_user_irq,
- .dispatch_gem_execbuffer = bsd_ring_dispatch_gem_execbuffer,
+ .dispatch_gem_execbuffer = ring_dispatch_gem_execbuffer,
};
@@ -789,10 +788,10 @@
GEN6_BSD_SLEEP_PSMI_CONTROL_RC_ILDL_MESSAGE_ENABLE);
}
-static void gen6_bsd_ring_flush(struct drm_device *dev,
- struct intel_ring_buffer *ring,
- u32 invalidate_domains,
- u32 flush_domains)
+static void gen6_ring_flush(struct drm_device *dev,
+ struct intel_ring_buffer *ring,
+ u32 invalidate_domains,
+ u32 flush_domains)
{
intel_ring_begin(dev, ring, 4);
intel_ring_emit(dev, ring, MI_FLUSH_DW);
@@ -803,11 +802,11 @@
}
static int
-gen6_bsd_ring_dispatch_gem_execbuffer(struct drm_device *dev,
- struct intel_ring_buffer *ring,
- struct drm_i915_gem_execbuffer2 *exec,
- struct drm_clip_rect *cliprects,
- uint64_t exec_offset)
+gen6_ring_dispatch_gem_execbuffer(struct drm_device *dev,
+ struct intel_ring_buffer *ring,
+ struct drm_i915_gem_execbuffer2 *exec,
+ struct drm_clip_rect *cliprects,
+ uint64_t exec_offset)
{
uint32_t exec_start;
@@ -831,12 +830,42 @@
.size = 32 * PAGE_SIZE,
.init = init_bsd_ring,
.set_tail = gen6_bsd_ring_set_tail,
- .flush = gen6_bsd_ring_flush,
- .add_request = bsd_ring_add_request,
- .get_seqno = bsd_ring_get_seqno,
+ .flush = gen6_ring_flush,
+ .add_request = ring_add_request,
+ .get_seqno = ring_status_page_get_seqno,
.user_irq_get = bsd_ring_get_user_irq,
.user_irq_put = bsd_ring_put_user_irq,
- .dispatch_gem_execbuffer = gen6_bsd_ring_dispatch_gem_execbuffer,
+ .dispatch_gem_execbuffer = gen6_ring_dispatch_gem_execbuffer,
+};
+
+/* Blitter support (SandyBridge+) */
+
+static void
+blt_ring_get_user_irq(struct drm_device *dev,
+ struct intel_ring_buffer *ring)
+{
+ /* do nothing */
+}
+static void
+blt_ring_put_user_irq(struct drm_device *dev,
+ struct intel_ring_buffer *ring)
+{
+ /* do nothing */
+}
+
+static const struct intel_ring_buffer gen6_blt_ring = {
+ .name = "blt ring",
+ .id = RING_BLT,
+ .mmio_base = BLT_RING_BASE,
+ .size = 32 * PAGE_SIZE,
+ .init = init_ring_common,
+ .set_tail = ring_set_tail,
+ .flush = gen6_ring_flush,
+ .add_request = ring_add_request,
+ .get_seqno = ring_status_page_get_seqno,
+ .user_irq_get = blt_ring_get_user_irq,
+ .user_irq_put = blt_ring_put_user_irq,
+ .dispatch_gem_execbuffer = gen6_ring_dispatch_gem_execbuffer,
};
int intel_init_render_ring_buffer(struct drm_device *dev)
@@ -866,3 +895,12 @@
return intel_init_ring_buffer(dev, &dev_priv->bsd_ring);
}
+
+int intel_init_blt_ring_buffer(struct drm_device *dev)
+{
+ drm_i915_private_t *dev_priv = dev->dev_private;
+
+ dev_priv->blt_ring = gen6_blt_ring;
+
+ return intel_init_ring_buffer(dev, &dev_priv->blt_ring);
+}