drm/i915: Introduce ring set_seqno

In preparation for setting per ring initial seqno values
add ring::set_seqno().

Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index 69bbe7b..f536a99 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -727,6 +727,12 @@ ring_get_seqno(struct intel_ring_buffer *ring, bool lazy_coherency)
        return intel_read_status_page(ring, I915_GEM_HWS_INDEX);
 }
 
+static void
+ring_set_seqno(struct intel_ring_buffer *ring, u32 seqno)
+{
+       intel_write_status_page(ring, I915_GEM_HWS_INDEX, seqno);
+}
+
 static u32
 pc_render_get_seqno(struct intel_ring_buffer *ring, bool lazy_coherency)
 {
@@ -734,6 +740,13 @@ pc_render_get_seqno(struct intel_ring_buffer *ring, bool lazy_coherency)
        return pc->cpu_page[0];
 }
 
+static void
+pc_render_set_seqno(struct intel_ring_buffer *ring, u32 seqno)
+{
+       struct pipe_control *pc = ring->private;
+       pc->cpu_page[0] = seqno;
+}
+
 static bool
 gen5_ring_get_irq(struct intel_ring_buffer *ring)
 {
@@ -1602,6 +1615,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
                ring->irq_put = gen6_ring_put_irq;
                ring->irq_enable_mask = GT_USER_INTERRUPT;
                ring->get_seqno = gen6_ring_get_seqno;
+               ring->set_seqno = ring_set_seqno;
                ring->sync_to = gen6_ring_sync;
                ring->semaphore_register[0] = MI_SEMAPHORE_SYNC_INVALID;
                ring->semaphore_register[1] = MI_SEMAPHORE_SYNC_RV;
@@ -1612,6 +1626,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
                ring->add_request = pc_render_add_request;
                ring->flush = gen4_render_ring_flush;
                ring->get_seqno = pc_render_get_seqno;
+               ring->set_seqno = pc_render_set_seqno;
                ring->irq_get = gen5_ring_get_irq;
                ring->irq_put = gen5_ring_put_irq;
                ring->irq_enable_mask = GT_USER_INTERRUPT | GT_PIPE_NOTIFY;
@@ -1622,6 +1637,7 @@ int intel_init_render_ring_buffer(struct drm_device *dev)
                else
                        ring->flush = gen4_render_ring_flush;
                ring->get_seqno = ring_get_seqno;
+               ring->set_seqno = ring_set_seqno;
                if (IS_GEN2(dev)) {
                        ring->irq_get = i8xx_ring_get_irq;
                        ring->irq_put = i8xx_ring_put_irq;
@@ -1672,6 +1688,7 @@ int intel_render_ring_init_dri(struct drm_device *dev, u64 start, u32 size)
        else
                ring->flush = gen4_render_ring_flush;
        ring->get_seqno = ring_get_seqno;
+       ring->set_seqno = ring_set_seqno;
        if (IS_GEN2(dev)) {
                ring->irq_get = i8xx_ring_get_irq;
                ring->irq_put = i8xx_ring_put_irq;
@@ -1732,6 +1749,7 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
                ring->flush = gen6_ring_flush;
                ring->add_request = gen6_add_request;
                ring->get_seqno = gen6_ring_get_seqno;
+               ring->set_seqno = ring_set_seqno;
                ring->irq_enable_mask = GEN6_BSD_USER_INTERRUPT;
                ring->irq_get = gen6_ring_get_irq;
                ring->irq_put = gen6_ring_put_irq;
@@ -1747,6 +1765,7 @@ int intel_init_bsd_ring_buffer(struct drm_device *dev)
                ring->flush = bsd_ring_flush;
                ring->add_request = i9xx_add_request;
                ring->get_seqno = ring_get_seqno;
+               ring->set_seqno = ring_set_seqno;
                if (IS_GEN5(dev)) {
                        ring->irq_enable_mask = GT_BSD_USER_INTERRUPT;
                        ring->irq_get = gen5_ring_get_irq;
@@ -1776,6 +1795,7 @@ int intel_init_blt_ring_buffer(struct drm_device *dev)
        ring->flush = blt_ring_flush;
        ring->add_request = gen6_add_request;
        ring->get_seqno = gen6_ring_get_seqno;
+       ring->set_seqno = ring_set_seqno;
        ring->irq_enable_mask = GEN6_BLITTER_USER_INTERRUPT;
        ring->irq_get = gen6_ring_get_irq;
        ring->irq_put = gen6_ring_put_irq;

diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index b4a533e..4a7cd67 100644 (file)
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -79,6 +79,8 @@ struct  intel_ring_buffer {
         */
        u32             (*get_seqno)(struct intel_ring_buffer *ring,
                                     bool lazy_coherency);
+       void            (*set_seqno)(struct intel_ring_buffer *ring,
+                                    u32 seqno);
        int             (*dispatch_execbuffer)(struct intel_ring_buffer *ring,
                                               u32 offset, u32 length,
                                               unsigned flags);
@@ -166,6 +168,13 @@ intel_read_status_page(struct intel_ring_buffer *ring,
        return ring->status_page.page_addr[reg];
 }
 
+static inline void
+intel_write_status_page(struct intel_ring_buffer *ring,
+                       int reg, u32 value)
+{
+       ring->status_page.page_addr[reg] = value;
+}
+
 /**
  * Reads a dword out of the status page, which is written to from the command
  * queue by automatic updates, MI_REPORT_HEAD, MI_STORE_DATA_INDEX, or