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Commit a360bb1a authored by Chris Wilson's avatar Chris Wilson Committed by Daniel Vetter
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drm/i915: Remove fence pipelining 

Step 2 is then to replace the pipelined parameter with NULL and perform
constant folding to remove dead code.
Signed-off-by: default avatarChris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: default avatarDaniel Vetter <daniel.vetter@ffwll.ch>
parent 06d98131
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Showing with 36 additions and 119 deletions
drivers/gpu/drm/i915/i915_gem.c
View file @ a360bb1a
......@@ -2166,8 +2166,7 @@ int i915_gpu_idle(struct drm_device *dev, bool do_retire)
return 0;
}
static int sandybridge_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
static int sandybridge_write_fence_reg(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
......@@ -2185,26 +2184,12 @@ static int sandybridge_write_fence_reg(struct drm_i915_gem_object *obj,
val |= 1 << I965_FENCE_TILING_Y_SHIFT;
val |= I965_FENCE_REG_VALID;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 6);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(2));
intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + regnum*8);
intel_ring_emit(pipelined, (u32)val);
intel_ring_emit(pipelined, FENCE_REG_SANDYBRIDGE_0 + regnum*8 + 4);
intel_ring_emit(pipelined, (u32)(val >> 32));
intel_ring_advance(pipelined);
} else
I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + regnum * 8, val);
I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + regnum * 8, val);
return 0;
}
static int i965_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
static int i965_write_fence_reg(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
......@@ -2220,26 +2205,12 @@ static int i965_write_fence_reg(struct drm_i915_gem_object *obj,
val |= 1 << I965_FENCE_TILING_Y_SHIFT;
val |= I965_FENCE_REG_VALID;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 6);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(2));
intel_ring_emit(pipelined, FENCE_REG_965_0 + regnum*8);
intel_ring_emit(pipelined, (u32)val);
intel_ring_emit(pipelined, FENCE_REG_965_0 + regnum*8 + 4);
intel_ring_emit(pipelined, (u32)(val >> 32));
intel_ring_advance(pipelined);
} else
I915_WRITE64(FENCE_REG_965_0 + regnum * 8, val);
I915_WRITE64(FENCE_REG_965_0 + regnum * 8, val);
return 0;
}
static int i915_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
static int i915_write_fence_reg(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
......@@ -2276,24 +2247,12 @@ static int i915_write_fence_reg(struct drm_i915_gem_object *obj,
else
fence_reg = FENCE_REG_945_8 + (fence_reg - 8) * 4;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 4);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(1));
intel_ring_emit(pipelined, fence_reg);
intel_ring_emit(pipelined, val);
intel_ring_advance(pipelined);
} else
I915_WRITE(fence_reg, val);
I915_WRITE(fence_reg, val);
return 0;
}
static int i830_write_fence_reg(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
static int i830_write_fence_reg(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
drm_i915_private_t *dev_priv = dev->dev_private;
......@@ -2319,18 +2278,7 @@ static int i830_write_fence_reg(struct drm_i915_gem_object *obj,
val |= pitch_val << I830_FENCE_PITCH_SHIFT;
val |= I830_FENCE_REG_VALID;
if (pipelined) {
int ret = intel_ring_begin(pipelined, 4);
if (ret)
return ret;
intel_ring_emit(pipelined, MI_NOOP);
intel_ring_emit(pipelined, MI_LOAD_REGISTER_IMM(1));
intel_ring_emit(pipelined, FENCE_REG_830_0 + regnum*4);
intel_ring_emit(pipelined, val);
intel_ring_advance(pipelined);
} else
I915_WRITE(FENCE_REG_830_0 + regnum * 4, val);
I915_WRITE(FENCE_REG_830_0 + regnum * 4, val);
return 0;
}
......@@ -2341,8 +2289,7 @@ static bool ring_passed_seqno(struct intel_ring_buffer *ring, u32 seqno)
}
static int
i915_gem_object_flush_fence(struct drm_i915_gem_object *obj,
struct intel_ring_buffer *pipelined)
i915_gem_object_flush_fence(struct drm_i915_gem_object *obj)
{
int ret;
......@@ -2357,7 +2304,7 @@ i915_gem_object_flush_fence(struct drm_i915_gem_object *obj,
obj->fenced_gpu_access = false;
}
if (obj->last_fenced_seqno && pipelined != obj->last_fenced_ring) {
if (obj->last_fenced_seqno && NULL != obj->last_fenced_ring) {
if (!ring_passed_seqno(obj->last_fenced_ring,
obj->last_fenced_seqno)) {
ret = i915_wait_request(obj->last_fenced_ring,
......@@ -2388,7 +2335,7 @@ i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
if (obj->tiling_mode)
i915_gem_release_mmap(obj);
ret = i915_gem_object_flush_fence(obj, NULL);
ret = i915_gem_object_flush_fence(obj);
if (ret)
return ret;
......@@ -2406,8 +2353,7 @@ i915_gem_object_put_fence(struct drm_i915_gem_object *obj)
}
static struct drm_i915_fence_reg *
i915_find_fence_reg(struct drm_device *dev,
struct intel_ring_buffer *pipelined)
i915_find_fence_reg(struct drm_device *dev)
{
struct drm_i915_private *dev_priv = dev->dev_private;
struct drm_i915_fence_reg *reg, *first, *avail;
......@@ -2436,9 +2382,7 @@ i915_find_fence_reg(struct drm_device *dev,
if (first == NULL)
first = reg;
if (!pipelined ||
!reg->obj->last_fenced_ring ||
reg->obj->last_fenced_ring == pipelined) {
if (reg->obj->last_fenced_ring == NULL) {
avail = reg;
break;
}
......@@ -2469,67 +2413,46 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
{
struct drm_device *dev = obj->base.dev;
struct drm_i915_private *dev_priv = dev->dev_private;
struct intel_ring_buffer *pipelined;
struct drm_i915_fence_reg *reg;
int ret;
if (obj->tiling_mode == I915_TILING_NONE)
return i915_gem_object_put_fence(obj);
/* XXX disable pipelining. There are bugs. Shocking. */
pipelined = NULL;
/* Just update our place in the LRU if our fence is getting reused. */
if (obj->fence_reg != I915_FENCE_REG_NONE) {
reg = &dev_priv->fence_regs[obj->fence_reg];
list_move_tail(&reg->lru_list, &dev_priv->mm.fence_list);
if (obj->tiling_changed) {
ret = i915_gem_object_flush_fence(obj, pipelined);
ret = i915_gem_object_flush_fence(obj);
if (ret)
return ret;
if (!obj->fenced_gpu_access && !obj->last_fenced_seqno)
pipelined = NULL;
if (pipelined) {
reg->setup_seqno =
i915_gem_next_request_seqno(pipelined);
obj->last_fenced_seqno = reg->setup_seqno;
obj->last_fenced_ring = pipelined;
}
goto update;
}
if (!pipelined) {
if (reg->setup_seqno) {
if (!ring_passed_seqno(obj->last_fenced_ring,
reg->setup_seqno)) {
ret = i915_wait_request(obj->last_fenced_ring,
reg->setup_seqno,
true);
if (ret)
return ret;
}
reg->setup_seqno = 0;
if (reg->setup_seqno) {
if (!ring_passed_seqno(obj->last_fenced_ring,
reg->setup_seqno)) {
ret = i915_wait_request(obj->last_fenced_ring,
reg->setup_seqno,
true);
if (ret)
return ret;
}
} else if (obj->last_fenced_ring &&
obj->last_fenced_ring != pipelined) {
ret = i915_gem_object_flush_fence(obj, pipelined);
if (ret)
return ret;
reg->setup_seqno = 0;
}
return 0;
}
reg = i915_find_fence_reg(dev, pipelined);
reg = i915_find_fence_reg(dev);
if (reg == NULL)
return -EDEADLK;
ret = i915_gem_object_flush_fence(obj, pipelined);
ret = i915_gem_object_flush_fence(obj);
if (ret)
return ret;
......@@ -2541,31 +2464,25 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
if (old->tiling_mode)
i915_gem_release_mmap(old);
ret = i915_gem_object_flush_fence(old, pipelined);
ret = i915_gem_object_flush_fence(old);
if (ret) {
drm_gem_object_unreference(&old->base);
return ret;
}
if (old->last_fenced_seqno == 0 && obj->last_fenced_seqno == 0)
pipelined = NULL;
old->fence_reg = I915_FENCE_REG_NONE;
old->last_fenced_ring = pipelined;
old->last_fenced_seqno =
pipelined ? i915_gem_next_request_seqno(pipelined) : 0;
old->last_fenced_ring = NULL;
old->last_fenced_seqno = 0;
drm_gem_object_unreference(&old->base);
} else if (obj->last_fenced_seqno == 0)
pipelined = NULL;
}
reg->obj = obj;
list_move_tail(&reg->lru_list, &dev_priv->mm.fence_list);
obj->fence_reg = reg - dev_priv->fence_regs;
obj->last_fenced_ring = pipelined;
obj->last_fenced_ring = NULL;
reg->setup_seqno =
pipelined ? i915_gem_next_request_seqno(pipelined) : 0;
reg->setup_seqno = 0;
obj->last_fenced_seqno = reg->setup_seqno;
update:
......@@ -2573,17 +2490,17 @@ i915_gem_object_get_fence(struct drm_i915_gem_object *obj)
switch (INTEL_INFO(dev)->gen) {
case 7:
case 6:
ret = sandybridge_write_fence_reg(obj, pipelined);
ret = sandybridge_write_fence_reg(obj);
break;
case 5:
case 4:
ret = i965_write_fence_reg(obj, pipelined);
ret = i965_write_fence_reg(obj);
break;
case 3:
ret = i915_write_fence_reg(obj, pipelined);
ret = i915_write_fence_reg(obj);
break;
case 2:
ret = i830_write_fence_reg(obj, pipelined);
ret = i830_write_fence_reg(obj);
break;
}
......
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