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drm/nve0: allow specification of channel engine type in abi16 call 

Previously, if either vram/gart handles were specified as ~0, the ioctl
call would fail.  In order to hack engine selection into the ioctl for
kepler, we now define (fb_ctxdma_handle == ~0) to mean "engine mask is
in tt_ctxdma_handle".

This approach also allows new userspace to detect lack of support for
non-PGRAPH channels on older kernels.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
This commit is contained in:
Ben Skeggs 2012-11-22 13:43:55 +10:00
parent 43598875b3
commit 4946980099
3 changed files with 18 additions and 11 deletions
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25
drivers/gpu/drm/nouveau/nouveau_abi16.c
View File

@ -242,14 +242,26 @@ nouveau_abi16_ioctl_channel_alloc(ABI16_IOCTL_ARGS)
if (unlikely(!abi16))
return -ENOMEM;
client = nv_client(abi16->client);
if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
return nouveau_abi16_put(abi16, -EINVAL);
device = nv_device(abi16->device);
imem = nouveau_instmem(device);
pfb = nouveau_fb(device);
/* hack to allow channel engine type specification on kepler */
if (device->card_type >= NV_E0) {
if (init->fb_ctxdma_handle != ~0)
init->fb_ctxdma_handle = NVE0_CHANNEL_IND_ENGINE_GR;
else
init->fb_ctxdma_handle = init->tt_ctxdma_handle;
/* allow flips to be executed if this is a graphics channel */
init->tt_ctxdma_handle = 0;
if (init->fb_ctxdma_handle == NVE0_CHANNEL_IND_ENGINE_GR)
init->tt_ctxdma_handle = 1;
}
if (init->fb_ctxdma_handle == ~0 || init->tt_ctxdma_handle == ~0)
return nouveau_abi16_put(abi16, -EINVAL);
/* allocate "abi16 channel" data and make up a handle for it */
init->channel = ffsll(~abi16->handles);
if (!init->channel--)
@ -264,11 +276,6 @@ 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);

2
drivers/gpu/drm/nouveau/nouveau_chan.c
View File

@ -346,7 +346,7 @@ 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.
*/
if (chan != chan->drm->cechan) {
if ((device->card_type < NV_E0) || gart /* nve0: want_nvsw */) {
ret = nouveau_object_new(nv_object(client), chan->handle,
NvSw, nouveau_abi16_swclass(chan->drm),
NULL, 0, &object);

2
drivers/gpu/drm/nouveau/nouveau_drm.c
View File

@ -148,7 +148,7 @@ nouveau_accel_init(struct nouveau_drm *drm)
NV_ERROR(drm, "failed to create ce channel, %d\n", ret);
arg0 = NVE0_CHANNEL_IND_ENGINE_GR;
arg1 = 0;
arg1 = 1;
} else {
arg0 = NvDmaFB;
arg1 = NvDmaTT;