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drm/nouveau/ltc/gf100: add flush/invalidate functions 

Allow clients to manually flush and invalidate L2. This will be useful
for Tegra systems for which we want to write instmem using the CPU.

Signed-off-by: Alexandre Courbot <acourbot@nvidia.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
hifive-unleashed-5.1
Alexandre Courbot 2015-09-03 17:48:15 +09:00 committed by Ben Skeggs
parent 38a8fc78d0
commit a0a49bac2f
5 changed files with 39 additions and 0 deletions
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1
drivers/gpu/drm/nouveau/include/nvkm/subdev/ltc.h
View File

@ -35,5 +35,6 @@ void nvkm_ltc_flush(struct nvkm_ltc *);
int gf100_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
int gk104_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
int gk20a_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
int gm107_ltc_new(struct nvkm_device *, int, struct nvkm_ltc **);
#endif

32
drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gf100.c
View File

@ -122,6 +122,36 @@ gf100_ltc_intr(struct nvkm_ltc *ltc)
}
}
void
gf100_ltc_invalidate(struct nvkm_ltc *ltc)
{
struct nvkm_device *device = ltc->subdev.device;
s64 taken;
nvkm_wr32(device, 0x70004, 0x00000001);
taken = nvkm_wait_msec(device, 2, 0x70004, 0x00000003, 0x00000000);
if (taken < 0)
nvkm_warn(&ltc->subdev, "LTC invalidate timeout\n");
if (taken > 0)
nvkm_debug(&ltc->subdev, "LTC invalidate took %lld ns\n", taken);
}
void
gf100_ltc_flush(struct nvkm_ltc *ltc)
{
struct nvkm_device *device = ltc->subdev.device;
s64 taken;
nvkm_wr32(device, 0x70010, 0x00000001);
taken = nvkm_wait_msec(device, 2, 0x70010, 0x00000003, 0x00000000);
if (taken < 0)
nvkm_warn(&ltc->subdev, "LTC flush timeout\n");
if (taken > 0)
nvkm_debug(&ltc->subdev, "LTC flush took %lld ns\n", taken);
}
/* TODO: Figure out tag memory details and drop the over-cautious allocation.
*/
int
@ -215,6 +245,8 @@ gf100_ltc = {
.zbc = 16,
.zbc_clear_color = gf100_ltc_zbc_clear_color,
.zbc_clear_depth = gf100_ltc_zbc_clear_depth,
.invalidate = gf100_ltc_invalidate,
.flush = gf100_ltc_flush,
};
int

2
drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gk104.c
View File

@ -45,6 +45,8 @@ gk104_ltc = {
.zbc = 16,
.zbc_clear_color = gf100_ltc_zbc_clear_color,
.zbc_clear_depth = gf100_ltc_zbc_clear_depth,
.invalidate = gf100_ltc_invalidate,
.flush = gf100_ltc_flush,
};
int

2
drivers/gpu/drm/nouveau/nvkm/subdev/ltc/gm107.c
View File

@ -138,6 +138,8 @@ gm107_ltc = {
.zbc = 16,
.zbc_clear_color = gm107_ltc_zbc_clear_color,
.zbc_clear_depth = gm107_ltc_zbc_clear_depth,
.invalidate = gf100_ltc_invalidate,
.flush = gf100_ltc_flush,
};
int

2
drivers/gpu/drm/nouveau/nvkm/subdev/ltc/priv.h
View File

@ -29,4 +29,6 @@ void gf100_ltc_cbc_clear(struct nvkm_ltc *, u32, u32);
void gf100_ltc_cbc_wait(struct nvkm_ltc *);
void gf100_ltc_zbc_clear_color(struct nvkm_ltc *, int, const u32[4]);
void gf100_ltc_zbc_clear_depth(struct nvkm_ltc *, int, const u32);
void gf100_ltc_invalidate(struct nvkm_ltc *);
void gf100_ltc_flush(struct nvkm_ltc *);
#endif