[Intel-gfx] [PATCH 1/5] drm/i915: clean up ring id/semaphore sync index magic
Ben Widawsky
ben at bwidawsk.net
Fri Sep 16 04:08:57 CEST 2011
From: Daniel Vetter <daniel.vetter at ffwll.ch>
The calculation of the semaphore sync register index is obfuscated
by some pointer calculation to get at the ring id (RCS, VCS and BCS).
Now we already have a ring->id field, but that contains a flag value
usefull for ORing together multiple rings - that's what the flushing
code as the user of this field needs.
So change the meaning of ring->id to be the real id, add a tiny
helper for those that actually want a flag and use ring->id in the
semaphore index calculations.
Also extract the inverse function intel_sync_index_to_ring_id and
move it right next to intel_ring_sync_index.
v2: Simplify RING_SYNC macro as suggested by Chris Wilson.
Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
---
drivers/gpu/drm/i915/i915_debugfs.c | 10 +++---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 4 +-
drivers/gpu/drm/i915/i915_reg.h | 3 +-
drivers/gpu/drm/i915/intel_ringbuffer.c | 30 +++++++----------
drivers/gpu/drm/i915/intel_ringbuffer.h | 48 +++++++++++++++++++--------
5 files changed, 54 insertions(+), 41 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_debugfs.c b/drivers/gpu/drm/i915/i915_debugfs.c
index 3c395a5..b4f3ecb 100644
--- a/drivers/gpu/drm/i915/i915_debugfs.c
+++ b/drivers/gpu/drm/i915/i915_debugfs.c
@@ -647,8 +647,8 @@ static int i915_ringbuffer_info(struct seq_file *m, void *data)
seq_printf(m, " Active : %08x\n", intel_ring_get_active_head(ring));
seq_printf(m, " NOPID : %08x\n", I915_READ_NOPID(ring));
if (IS_GEN6(dev)) {
- seq_printf(m, " Sync 0 : %08x\n", I915_READ_SYNC_0(ring));
- seq_printf(m, " Sync 1 : %08x\n", I915_READ_SYNC_1(ring));
+ seq_printf(m, " Sync 0 : %08x\n", I915_READ_SYNC(ring, 0));
+ seq_printf(m, " Sync 1 : %08x\n", I915_READ_SYNC(ring, 1));
}
seq_printf(m, " Control : %08x\n", I915_READ_CTL(ring));
seq_printf(m, " Start : %08x\n", I915_READ_START(ring));
@@ -659,9 +659,9 @@ static int i915_ringbuffer_info(struct seq_file *m, void *data)
static const char *ring_str(int ring)
{
switch (ring) {
- case RING_RENDER: return " render";
- case RING_BSD: return " bsd";
- case RING_BLT: return " blt";
+ case RCS: return " render";
+ case VCS: return " bsd";
+ case BCS: return " blt";
default: return "";
}
}
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index 4934cf8..f2e1af7 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -202,9 +202,9 @@ i915_gem_object_set_to_gpu_domain(struct drm_i915_gem_object *obj,
cd->invalidate_domains |= invalidate_domains;
cd->flush_domains |= flush_domains;
if (flush_domains & I915_GEM_GPU_DOMAINS)
- cd->flush_rings |= obj->ring->id;
+ cd->flush_rings |= intel_ring_flag(obj->ring);
if (invalidate_domains & I915_GEM_GPU_DOMAINS)
- cd->flush_rings |= ring->id;
+ cd->flush_rings |= intel_ring_flag(ring);
}
struct eb_objects {
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 542453f..f1cc55a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -294,8 +294,7 @@
#define RING_HEAD(base) ((base)+0x34)
#define RING_START(base) ((base)+0x38)
#define RING_CTL(base) ((base)+0x3c)
-#define RING_SYNC_0(base) ((base)+0x40)
-#define RING_SYNC_1(base) ((base)+0x44)
+#define RING_SYNC(base, idx) ((base)+0x40 + 4*(idx))
#define RING_MAX_IDLE(base) ((base)+0x54)
#define RING_HWS_PGA(base) ((base)+0x80)
#define RING_HWS_PGA_GEN6(base) ((base)+0x2080)
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.c b/drivers/gpu/drm/i915/intel_ringbuffer.c
index c30626e..9be0f11 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.c
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.c
@@ -319,24 +319,18 @@ update_semaphore(struct intel_ring_buffer *ring, int i, u32 seqno)
{
struct drm_device *dev = ring->dev;
struct drm_i915_private *dev_priv = dev->dev_private;
- int id;
+ struct intel_ring_buffer *other;
+ u32 reg;
- /*
- * cs -> 1 = vcs, 0 = bcs
- * vcs -> 1 = bcs, 0 = cs,
- * bcs -> 1 = cs, 0 = vcs.
- */
- id = ring - dev_priv->ring;
- id += 2 - i;
- id %= 3;
+ other = &dev_priv->ring[intel_sync_index_to_ring_id(ring, i)];
+ reg = RING_SYNC(other->mmio_base, i);
intel_ring_emit(ring,
MI_SEMAPHORE_MBOX |
MI_SEMAPHORE_REGISTER |
MI_SEMAPHORE_UPDATE);
intel_ring_emit(ring, seqno);
- intel_ring_emit(ring,
- RING_SYNC_0(dev_priv->ring[id].mmio_base) + 4*i);
+ intel_ring_emit(ring, reg);
}
static int
@@ -565,13 +559,13 @@ void intel_ring_setup_status_page(struct intel_ring_buffer *ring)
*/
if (IS_GEN7(dev)) {
switch (ring->id) {
- case RING_RENDER:
+ case RCS:
mmio = RENDER_HWS_PGA_GEN7;
break;
- case RING_BLT:
+ case BCS:
mmio = BLT_HWS_PGA_GEN7;
break;
- case RING_BSD:
+ case VCS:
mmio = BSD_HWS_PGA_GEN7;
break;
}
@@ -1015,7 +1009,7 @@ void intel_ring_advance(struct intel_ring_buffer *ring)
static const struct intel_ring_buffer render_ring = {
.name = "render ring",
- .id = RING_RENDER,
+ .id = RCS,
.mmio_base = RENDER_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = init_render_ring,
@@ -1033,7 +1027,7 @@ static const struct intel_ring_buffer render_ring = {
static const struct intel_ring_buffer bsd_ring = {
.name = "bsd ring",
- .id = RING_BSD,
+ .id = VCS,
.mmio_base = BSD_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = init_ring_common,
@@ -1143,7 +1137,7 @@ gen6_bsd_ring_put_irq(struct intel_ring_buffer *ring)
/* ring buffer for Video Codec for Gen6+ */
static const struct intel_ring_buffer gen6_bsd_ring = {
.name = "gen6 bsd ring",
- .id = RING_BSD,
+ .id = VCS,
.mmio_base = GEN6_BSD_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = init_ring_common,
@@ -1273,7 +1267,7 @@ static void blt_ring_cleanup(struct intel_ring_buffer *ring)
static const struct intel_ring_buffer gen6_blt_ring = {
.name = "blt ring",
- .id = RING_BLT,
+ .id = BCS,
.mmio_base = BLT_RING_BASE,
.size = 32 * PAGE_SIZE,
.init = blt_ring_init,
diff --git a/drivers/gpu/drm/i915/intel_ringbuffer.h b/drivers/gpu/drm/i915/intel_ringbuffer.h
index 39ac2b6..0029978 100644
--- a/drivers/gpu/drm/i915/intel_ringbuffer.h
+++ b/drivers/gpu/drm/i915/intel_ringbuffer.h
@@ -1,13 +1,6 @@
#ifndef _INTEL_RINGBUFFER_H_
#define _INTEL_RINGBUFFER_H_
-enum {
- RCS = 0x0,
- VCS,
- BCS,
- I915_NUM_RINGS,
-};
-
struct intel_hw_status_page {
u32 __iomem *page_addr;
unsigned int gfx_addr;
@@ -30,16 +23,19 @@ struct intel_hw_status_page {
#define I915_WRITE_IMR(ring, val) I915_WRITE(RING_IMR((ring)->mmio_base), val)
#define I915_READ_NOPID(ring) I915_READ(RING_NOPID((ring)->mmio_base))
-#define I915_READ_SYNC_0(ring) I915_READ(RING_SYNC_0((ring)->mmio_base))
-#define I915_READ_SYNC_1(ring) I915_READ(RING_SYNC_1((ring)->mmio_base))
+#define I915_READ_SYNC(ring, idx) I915_READ(RING_SYNC((ring)->mmio_base, (idx)))
struct intel_ring_buffer {
const char *name;
- enum intel_ring_id {
- RING_RENDER = 0x1,
- RING_BSD = 0x2,
- RING_BLT = 0x4,
+ enum {
+ RCS = 0x0,
+ VCS,
+ BCS,
} id;
+#define I915_NUM_RINGS (BCS+1)
+#define RING_RENDER (1<<RCS)
+#define RING_BSD (1<<VCS)
+#define RING_BLT (1<<BLT)
u32 mmio_base;
void __iomem *virtual_start;
struct drm_device *dev;
@@ -114,6 +110,12 @@ struct intel_ring_buffer {
void *private;
};
+static inline unsigned
+intel_ring_flag(struct intel_ring_buffer *ring)
+{
+ return (1 << ring->id);
+}
+
static inline u32
intel_ring_sync_index(struct intel_ring_buffer *ring,
struct intel_ring_buffer *other)
@@ -126,13 +128,31 @@ intel_ring_sync_index(struct intel_ring_buffer *ring,
* bcs -> 0 = cs, 1 = vcs.
*/
- idx = (other - ring) - 1;
+ idx = (other->id - ring->id) - 1;
if (idx < 0)
idx += I915_NUM_RINGS;
return idx;
}
+static inline int
+intel_sync_index_to_ring_id(struct intel_ring_buffer *ring,
+ int other)
+{
+ int id;
+
+ /*
+ * cs -> 1 = vcs, 0 = bcs
+ * vcs -> 1 = bcs, 0 = cs,
+ * bcs -> 1 = cs, 0 = vcs.
+ */
+ id = ring->id;
+ id += 2 - other;
+ id %= 3;
+
+ return id;
+}
+
static inline u32
intel_read_status_page(struct intel_ring_buffer *ring,
int reg)
--
1.7.6.1
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