drm/nve0: use async copy engine for ttm buffer moves if available

Kepler PFIFO lost the ability to address multiple engines from a single
channel, so we need a separate one for the copy engine.

v2: Marcin Slusarz <marcin.slusarz@gmail.com>
- regression fix: restore hw accelerated buffer copies

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

diff --git a/drivers/gpu/drm/nouveau/nouveau_abi16.c b/drivers/gpu/drm/nouveau/nouveau_abi16.c
index 9e6ced3..cc79c79 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_abi16.c
+++ b/drivers/gpu/drm/nouveau/nouveau_abi16.c
@@ -264,6 +264,11 @@ nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
        abi16->handles |= (1 << init->channel);
 
        /* create channel object and initialise dma and fence management */
+       if (device->card_type >= NV_E0) {
+               init->fb_ctxdma_handle = NVE0_CHANNEL_IND_ENGINE_GR;
+               init->tt_ctxdma_handle = 0;
+       }
+
        ret = nouveau_channel_new(drm, cli, NVDRM_DEVICE, NVDRM_CHAN |
                                  init->channel, init->fb_ctxdma_handle,
                                  init->tt_ctxdma_handle, &chan->chan);

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.c b/drivers/gpu/drm/nouveau/nouveau_bo.c
index ef96bdb..259e5f1 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_bo.c
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.c
@@ -570,6 +570,18 @@ nouveau_bo_move_accel_cleanup(struct nouveau_channel *chan,
        return ret;
 }
 
+static int
+nve0_bo_move_init(struct nouveau_channel *chan, u32 handle)
+{
+       int ret = RING_SPACE(chan, 2);
+       if (ret == 0) {
+               BEGIN_NVC0(chan, NvSubCopy, 0x0000, 1);
+               OUT_RING  (chan, handle);
+               FIRE_RING (chan);
+       }
+       return ret;
+}
+
 static int
 nve0_bo_move_copy(struct nouveau_channel *chan, struct ttm_buffer_object *bo,
                  struct ttm_mem_reg *old_mem, struct ttm_mem_reg *new_mem)
@@ -991,10 +1003,8 @@ out:
 }
 
 void
-nouveau_bo_move_init(struct nouveau_channel *chan)
+nouveau_bo_move_init(struct nouveau_drm *drm)
 {
-       struct nouveau_cli *cli = chan->cli;
-       struct nouveau_drm *drm = chan->drm;
        static const struct {
                const char *name;
                int engine;
@@ -1004,7 +1014,8 @@ nouveau_bo_move_init(struct nouveau_channel *chan)
                            struct ttm_mem_reg *, struct ttm_mem_reg *);
                int (*init)(struct nouveau_channel *, u32 handle);
        } _methods[] = {
-               {  "COPY", 0, 0xa0b5, nve0_bo_move_copy, nvc0_bo_move_init },
+               {  "COPY", 0, 0xa0b5, nve0_bo_move_copy, nve0_bo_move_init },
+               {  "GRCE", 0, 0xa0b5, nve0_bo_move_copy, nvc0_bo_move_init },
                { "COPY1", 5, 0x90b8, nvc0_bo_move_copy, nvc0_bo_move_init },
                { "COPY0", 4, 0x90b5, nvc0_bo_move_copy, nvc0_bo_move_init },
                {  "COPY", 0, 0x85b5, nva3_bo_move_copy, nv50_bo_move_init },
@@ -1020,14 +1031,22 @@ nouveau_bo_move_init(struct nouveau_channel *chan)
 
        do {
                struct nouveau_object *object;
+               struct nouveau_channel *chan;
                u32 handle = (mthd->engine << 16) | mthd->oclass;
 
-               ret = nouveau_object_new(nv_object(cli), chan->handle, handle,
+               if (mthd->init == nve0_bo_move_init)
+                       chan = drm->cechan;
+               else
+                       chan = drm->channel;
+               if (chan == NULL)
+                       continue;
+
+               ret = nouveau_object_new(nv_object(drm), chan->handle, handle,
                                         mthd->oclass, NULL, 0, &object);
                if (ret == 0) {
                        ret = mthd->init(chan, handle);
                        if (ret) {
-                               nouveau_object_del(nv_object(cli),
+                               nouveau_object_del(nv_object(drm),
                                                   chan->handle, handle);
                                continue;
                        }

diff --git a/drivers/gpu/drm/nouveau/nouveau_bo.h b/drivers/gpu/drm/nouveau/nouveau_bo.h
index c42aea9..dec51b1 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_bo.h
+++ b/drivers/gpu/drm/nouveau/nouveau_bo.h
@@ -61,7 +61,7 @@ nouveau_bo_ref(struct nouveau_bo *ref, struct nouveau_bo **pnvbo)
 
 extern struct ttm_bo_driver nouveau_bo_driver;
 
-void nouveau_bo_move_init(struct nouveau_channel *);
+void nouveau_bo_move_init(struct nouveau_drm *);
 int  nouveau_bo_new(struct drm_device *, int size, int align, u32 flags,
                    u32 tile_mode, u32 tile_flags, struct sg_table *sg,
                    struct nouveau_bo **);

diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.c b/drivers/gpu/drm/nouveau/nouveau_chan.c
index b1eea19..62c7edf 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_chan.c
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.c
@@ -184,7 +184,8 @@ nouveau_channel_prep(struct nouveau_drm *drm, struct nouveau_cli *cli,
 
 int
 nouveau_channel_ind(struct nouveau_drm *drm, struct nouveau_cli *cli,
-                   u32 parent, u32 handle, struct nouveau_channel **pchan)
+                   u32 parent, u32 handle, u32 engine,
+                   struct nouveau_channel **pchan)
 {
        static const u16 oclasses[] = { 0xa06f, 0x906f, 0x826f, 0x506f, 0 };
        const u16 *oclass = oclasses;
@@ -202,7 +203,7 @@ nouveau_channel_ind(struct nouveau_drm *drm, struct nouveau_cli *cli,
        args.pushbuf = chan->push.handle;
        args.ioffset = 0x10000 + chan->push.vma.offset;
        args.ilength = 0x02000;
-       args.engine  = NVE0_CHANNEL_IND_ENGINE_GR;
+       args.engine  = engine;
 
        do {
                ret = nouveau_object_new(nv_object(cli), parent, handle,
@@ -261,9 +262,6 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
        struct nv_dma_class args;
        int ret, i;
 
-       chan->vram = vram;
-       chan->gart = gart;
-
        /* allocate dma objects to cover all allowed vram, and gart */
        if (device->card_type < NV_C0) {
                if (device->card_type >= NV_50) {
@@ -301,6 +299,9 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
                                         0x003d, &args, sizeof(args), &object);
                if (ret)
                        return ret;
+
+               chan->vram = vram;
+               chan->gart = gart;
        }
 
        /* initialise dma tracking parameters */
@@ -336,15 +337,17 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
        /* allocate software object class (used for fences on <= nv05, and
         * to signal flip completion), bind it to a subchannel.
         */
-       ret = nouveau_object_new(nv_object(client), chan->handle,
-                                NvSw, nouveau_abi16_swclass(chan->drm),
-                                NULL, 0, &object);
-       if (ret)
-               return ret;
+       if (chan != chan->drm->cechan) {
+               ret = nouveau_object_new(nv_object(client), chan->handle,
+                                        NvSw, nouveau_abi16_swclass(chan->drm),
+                                        NULL, 0, &object);
+               if (ret)
+                       return ret;
 
-       swch = (void *)object->parent;
-       swch->flip = nouveau_flip_complete;
-       swch->flip_data = chan;
+               swch = (void *)object->parent;
+               swch->flip = nouveau_flip_complete;
+               swch->flip_data = chan;
+       }
 
        if (device->card_type < NV_C0) {
                ret = RING_SPACE(chan, 2);
@@ -362,12 +365,12 @@ nouveau_channel_init(struct nouveau_channel *chan, u32 vram, u32 gart)
 
 int
 nouveau_channel_new(struct nouveau_drm *drm, struct nouveau_cli *cli,
-                   u32 parent, u32 handle, u32 vram, u32 gart,
+                   u32 parent, u32 handle, u32 arg0, u32 arg1,
                    struct nouveau_channel **pchan)
 {
        int ret;
 
-       ret = nouveau_channel_ind(drm, cli, parent, handle, pchan);
+       ret = nouveau_channel_ind(drm, cli, parent, handle, arg0, pchan);
        if (ret) {
                NV_DEBUG(drm, "ib channel create, %d\n", ret);
                ret = nouveau_channel_dma(drm, cli, parent, handle, pchan);
@@ -377,7 +380,7 @@ nouveau_channel_new(struct nouveau_drm *drm, struct nouveau_cli *cli,
                }
        }
 
-       ret = nouveau_channel_init(*pchan, vram, gart);
+       ret = nouveau_channel_init(*pchan, arg0, arg1);
        if (ret) {
                NV_ERROR(drm, "channel failed to initialise, %d\n", ret);
                nouveau_channel_del(pchan);

diff --git a/drivers/gpu/drm/nouveau/nouveau_chan.h b/drivers/gpu/drm/nouveau/nouveau_chan.h
index 0fa9424..40f97e2 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_chan.h
+++ b/drivers/gpu/drm/nouveau/nouveau_chan.h
@@ -39,7 +39,7 @@ struct nouveau_channel {
 
 
 int  nouveau_channel_new(struct nouveau_drm *, struct nouveau_cli *,
-                        u32 parent, u32 handle, u32 vram, u32 gart,
+                        u32 parent, u32 handle, u32 arg0, u32 arg1,
                         struct nouveau_channel **);
 void nouveau_channel_del(struct nouveau_channel **);
 int  nouveau_channel_idle(struct nouveau_channel *);

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.c b/drivers/gpu/drm/nouveau/nouveau_drm.c
index 8b508ce..4dfc40e 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.c
@@ -109,6 +109,7 @@ nouveau_accel_fini(struct nouveau_drm *drm)
 {
        nouveau_gpuobj_ref(NULL, &drm->notify);
        nouveau_channel_del(&drm->channel);
+       nouveau_channel_del(&drm->cechan);
        if (drm->fence)
                nouveau_fence(drm)->dtor(drm);
 }
@@ -118,6 +119,7 @@ nouveau_accel_init(struct nouveau_drm *drm)
 {
        struct nouveau_device *device = nv_device(drm->device);
        struct nouveau_object *object;
+       u32 arg0, arg1;
        int ret;
 
        if (nouveau_noaccel)
@@ -134,8 +136,24 @@ nouveau_accel_init(struct nouveau_drm *drm)
                return;
        }
 
+       if (device->card_type >= NV_E0) {
+               ret = nouveau_channel_new(drm, &drm->client, NVDRM_DEVICE,
+                                         NVDRM_CHAN + 1,
+                                         NVE0_CHANNEL_IND_ENGINE_CE0 |
+                                         NVE0_CHANNEL_IND_ENGINE_CE1, 0,
+                                         &drm->cechan);
+               if (ret)
+                       NV_ERROR(drm, "failed to create ce channel, %d\n", ret);
+
+               arg0 = NVE0_CHANNEL_IND_ENGINE_GR;
+               arg1 = 0;
+       } else {
+               arg0 = NvDmaFB;
+               arg1 = NvDmaTT;
+       }
+
        ret = nouveau_channel_new(drm, &drm->client, NVDRM_DEVICE, NVDRM_CHAN,
-                                 NvDmaFB, NvDmaTT, &drm->channel);
+                                 arg0, arg1, &drm->channel);
        if (ret) {
                NV_ERROR(drm, "failed to create kernel channel, %d\n", ret);
                nouveau_accel_fini(drm);
@@ -167,7 +185,7 @@ nouveau_accel_init(struct nouveau_drm *drm)
        }
 
 
-       nouveau_bo_move_init(drm->channel);
+       nouveau_bo_move_init(drm);
 }
 
 static int __devinit

diff --git a/drivers/gpu/drm/nouveau/nouveau_drm.h b/drivers/gpu/drm/nouveau/nouveau_drm.h
index 6abd1a1..ab0c174 100644 (file)
--- a/drivers/gpu/drm/nouveau/nouveau_drm.h
+++ b/drivers/gpu/drm/nouveau/nouveau_drm.h
@@ -97,6 +97,7 @@ struct nouveau_drm {
        void *fence;
 
        /* context for accelerated drm-internal operations */
+       struct nouveau_channel *cechan;
        struct nouveau_channel *channel;
        struct nouveau_gpuobj *notify;
        struct nouveau_fbdev *fbcon;