From: Ben Skeggs <bskeggs@redhat.com>
Date: Sat, 2 Mar 2013 03:21:31 +0000 (+1000)
Subject: drm/nv50-: prevent some races between modesetting and page flipping
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=9f9bdaaf07dee47f73a160e6e4c64f67ee26c1d7;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git
drm/nv50-: prevent some races between modesetting and page flipping
nexuiz-glx + gnome-shell is able to trigger this a lot of the time.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
---
diff --git a/drivers/gpu/drm/nouveau/nv50_display.c b/drivers/gpu/drm/nouveau/nv50_display.c
index e26caf63db0c..87a5a56ed358 100644
--- a/drivers/gpu/drm/nouveau/nv50_display.c
+++ b/drivers/gpu/drm/nouveau/nv50_display.c
@@ -55,9 +55,9 @@
/* offsets in shared sync bo of various structures */
#define EVO_SYNC(c, o) ((c) * 0x0100 + (o))
-#define EVO_MAST_NTFY EVO_SYNC( 0, 0x00)
-#define EVO_FLIP_SEM0(c) EVO_SYNC((c), 0x00)
-#define EVO_FLIP_SEM1(c) EVO_SYNC((c), 0x10)
+#define EVO_MAST_NTFY EVO_SYNC( 0, 0x00)
+#define EVO_FLIP_SEM0(c) EVO_SYNC((c) + 1, 0x00)
+#define EVO_FLIP_SEM1(c) EVO_SYNC((c) + 1, 0x10)
#define EVO_CORE_HANDLE (0xd1500000)
#define EVO_CHAN_HANDLE(t,i) (0xd15c0000 | (((t) & 0x00ff) << 8) | (i))
@@ -341,10 +341,8 @@ struct nv50_curs {
struct nv50_sync {
struct nv50_dmac base;
- struct {
- u32 offset;
- u16 value;
- } sem;
+ u32 addr;
+ u32 data;
};
struct nv50_ovly {
@@ -471,13 +469,33 @@ nv50_display_crtc_sema(struct drm_device *dev, int crtc)
return nv50_disp(dev)->sync;
}
+struct nv50_display_flip {
+ struct nv50_disp *disp;
+ struct nv50_sync *chan;
+};
+
+static bool
+nv50_display_flip_wait(void *data)
+{
+ struct nv50_display_flip *flip = data;
+ if (nouveau_bo_rd32(flip->disp->sync, flip->chan->addr / 4) ==
+ flip->chan->data);
+ return true;
+ usleep_range(1, 2);
+ return false;
+}
+
void
nv50_display_flip_stop(struct drm_crtc *crtc)
{
- struct nv50_sync *sync = nv50_sync(crtc);
+ struct nouveau_device *device = nouveau_dev(crtc->dev);
+ struct nv50_display_flip flip = {
+ .disp = nv50_disp(crtc->dev),
+ .chan = nv50_sync(crtc),
+ };
u32 *push;
- push = evo_wait(sync, 8);
+ push = evo_wait(flip.chan, 8);
if (push) {
evo_mthd(push, 0x0084, 1);
evo_data(push, 0x00000000);
@@ -487,8 +505,10 @@ nv50_display_flip_stop(struct drm_crtc *crtc)
evo_data(push, 0x00000000);
evo_mthd(push, 0x0080, 1);
evo_data(push, 0x00000000);
- evo_kick(push, sync);
+ evo_kick(push, flip.chan);
}
+
+ nv_wait_cb(device, nv50_display_flip_wait, &flip);
}
int
@@ -496,11 +516,10 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb,
struct nouveau_channel *chan, u32 swap_interval)
{
struct nouveau_framebuffer *nv_fb = nouveau_framebuffer(fb);
- struct nv50_disp *disp = nv50_disp(crtc->dev);
struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
struct nv50_sync *sync = nv50_sync(crtc);
+ int head = nv_crtc->index, ret;
u32 *push;
- int ret;
swap_interval <<= 4;
if (swap_interval == 0)
@@ -510,66 +529,64 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb,
if (unlikely(push == NULL))
return -EBUSY;
- /* synchronise with the rendering channel, if necessary */
- if (likely(chan)) {
- if (nv_mclass(chan->object) < NV84_CHANNEL_IND_CLASS) {
- ret = RING_SPACE(chan, 8);
- if (ret)
- return ret;
-
- BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 2);
- OUT_RING (chan, NvEvoSema0 + nv_crtc->index);
- OUT_RING (chan, sync->sem.offset);
- BEGIN_NV04(chan, 0, NV11_SUBCHAN_SEMAPHORE_RELEASE, 1);
- OUT_RING (chan, 0xf00d0000 | sync->sem.value);
- BEGIN_NV04(chan, 0, NV11_SUBCHAN_SEMAPHORE_OFFSET, 2);
- OUT_RING (chan, sync->sem.offset ^ 0x10);
- OUT_RING (chan, 0x74b1e000);
- } else
- if (nv_mclass(chan->object) < NVC0_CHANNEL_IND_CLASS) {
- u64 offset = nv84_fence_crtc(chan, nv_crtc->index);
- offset += sync->sem.offset;
-
- ret = RING_SPACE(chan, 12);
- if (ret)
- return ret;
-
- BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 1);
- OUT_RING (chan, chan->vram);
- BEGIN_NV04(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
- OUT_RING (chan, upper_32_bits(offset));
- OUT_RING (chan, lower_32_bits(offset));
- OUT_RING (chan, 0xf00d0000 | sync->sem.value);
- OUT_RING (chan, 0x00000002);
- BEGIN_NV04(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
- OUT_RING (chan, upper_32_bits(offset));
- OUT_RING (chan, lower_32_bits(offset ^ 0x10));
- OUT_RING (chan, 0x74b1e000);
- OUT_RING (chan, 0x00000001);
- } else {
- u64 offset = nv84_fence_crtc(chan, nv_crtc->index);
- offset += sync->sem.offset;
-
- ret = RING_SPACE(chan, 10);
- if (ret)
- return ret;
-
- BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
- OUT_RING (chan, upper_32_bits(offset));
- OUT_RING (chan, lower_32_bits(offset));
- OUT_RING (chan, 0xf00d0000 | sync->sem.value);
- OUT_RING (chan, 0x00001002);
- BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
- OUT_RING (chan, upper_32_bits(offset));
- OUT_RING (chan, lower_32_bits(offset ^ 0x10));
- OUT_RING (chan, 0x74b1e000);
- OUT_RING (chan, 0x00001001);
- }
+ if (chan && nv_mclass(chan->object) < NV84_CHANNEL_IND_CLASS) {
+ ret = RING_SPACE(chan, 8);
+ if (ret)
+ return ret;
+
+ BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 2);
+ OUT_RING (chan, NvEvoSema0 + head);
+ OUT_RING (chan, sync->addr ^ 0x10);
+ BEGIN_NV04(chan, 0, NV11_SUBCHAN_SEMAPHORE_RELEASE, 1);
+ OUT_RING (chan, sync->data + 1);
+ BEGIN_NV04(chan, 0, NV11_SUBCHAN_SEMAPHORE_OFFSET, 2);
+ OUT_RING (chan, sync->addr);
+ OUT_RING (chan, sync->data);
+ } else
+ if (chan && nv_mclass(chan->object) < NVC0_CHANNEL_IND_CLASS) {
+ u64 addr = nv84_fence_crtc(chan, head) + sync->addr;
+ ret = RING_SPACE(chan, 12);
+ if (ret)
+ return ret;
+
+ BEGIN_NV04(chan, 0, NV11_SUBCHAN_DMA_SEMAPHORE, 1);
+ OUT_RING (chan, chan->vram);
+ BEGIN_NV04(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
+ OUT_RING (chan, upper_32_bits(addr ^ 0x10));
+ OUT_RING (chan, lower_32_bits(addr ^ 0x10));
+ OUT_RING (chan, sync->data + 1);
+ OUT_RING (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG);
+ BEGIN_NV04(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
+ OUT_RING (chan, upper_32_bits(addr));
+ OUT_RING (chan, lower_32_bits(addr));
+ OUT_RING (chan, sync->data);
+ OUT_RING (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_EQUAL);
+ } else
+ if (chan) {
+ u64 addr = nv84_fence_crtc(chan, head) + sync->addr;
+ ret = RING_SPACE(chan, 10);
+ if (ret)
+ return ret;
+
+ BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
+ OUT_RING (chan, upper_32_bits(addr ^ 0x10));
+ OUT_RING (chan, lower_32_bits(addr ^ 0x10));
+ OUT_RING (chan, sync->data + 1);
+ OUT_RING (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_WRITE_LONG |
+ NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD);
+ BEGIN_NVC0(chan, 0, NV84_SUBCHAN_SEMAPHORE_ADDRESS_HIGH, 4);
+ OUT_RING (chan, upper_32_bits(addr));
+ OUT_RING (chan, lower_32_bits(addr));
+ OUT_RING (chan, sync->data);
+ OUT_RING (chan, NV84_SUBCHAN_SEMAPHORE_TRIGGER_ACQUIRE_EQUAL |
+ NVC0_SUBCHAN_SEMAPHORE_TRIGGER_YIELD);
+ }
+ if (chan) {
+ sync->addr ^= 0x10;
+ sync->data++;
FIRE_RING (chan);
} else {
- nouveau_bo_wr32(disp->sync, sync->sem.offset / 4,
- 0xf00d0000 | sync->sem.value);
evo_sync(crtc->dev);
}
@@ -583,9 +600,9 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb,
evo_data(push, 0x40000000);
}
evo_mthd(push, 0x0088, 4);
- evo_data(push, sync->sem.offset);
- evo_data(push, 0xf00d0000 | sync->sem.value);
- evo_data(push, 0x74b1e000);
+ evo_data(push, sync->addr);
+ evo_data(push, sync->data++);
+ evo_data(push, sync->data);
evo_data(push, NvEvoSync);
evo_mthd(push, 0x00a0, 2);
evo_data(push, 0x00000000);
@@ -613,9 +630,6 @@ nv50_display_flip_next(struct drm_crtc *crtc, struct drm_framebuffer *fb,
evo_mthd(push, 0x0080, 1);
evo_data(push, 0x00000000);
evo_kick(push, sync);
-
- sync->sem.offset ^= 0x10;
- sync->sem.value++;
return 0;
}
@@ -1387,7 +1401,8 @@ nv50_crtc_create(struct drm_device *dev, struct nouveau_object *core, int index)
if (ret)
goto out;
- head->sync.sem.offset = EVO_SYNC(1 + index, 0x00);
+ head->sync.addr = EVO_FLIP_SEM0(index);
+ head->sync.data = 0x00000000;
/* allocate overlay resources */
ret = nv50_pioc_create(disp->core, NV50_DISP_OIMM_CLASS, index,
@@ -2120,15 +2135,23 @@ nv50_display_fini(struct drm_device *dev)
int
nv50_display_init(struct drm_device *dev)
{
- u32 *push = evo_wait(nv50_mast(dev), 32);
- if (push) {
- evo_mthd(push, 0x0088, 1);
- evo_data(push, NvEvoSync);
- evo_kick(push, nv50_mast(dev));
- return 0;
+ struct nv50_disp *disp = nv50_disp(dev);
+ struct drm_crtc *crtc;
+ u32 *push;
+
+ push = evo_wait(nv50_mast(dev), 32);
+ if (!push)
+ return -EBUSY;
+
+ list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+ struct nv50_sync *sync = nv50_sync(crtc);
+ nouveau_bo_wr32(disp->sync, sync->addr / 4, sync->data);
}
- return -EBUSY;
+ evo_mthd(push, 0x0088, 1);
+ evo_data(push, NvEvoSync);
+ evo_kick(push, nv50_mast(dev));
+ return 0;
}
void