diff options
| author | Ben Skeggs <bskeggs@redhat.com> | 2017-08-04 10:44:34 +1000 |
|---|---|---|
| committer | Ben Skeggs <bskeggs@redhat.com> | 2017-08-22 18:04:33 +1000 |
| commit | 485c2c91d403185c126dd18bfc98599be9db3acf (patch) | |
| tree | 99bbcfbfe92f422347f0b787216f3c6e635ee520 | |
| parent | 2659b4ce284be569b06ea2c13e5d30517f8095ed (diff) | |
| download | linux-485c2c91d403185c126dd18bfc98599be9db3acf.tar.bz2 | |
drm/nouveau/bar/gf100: add config option to limit BAR2 to 16MiB
Useful for testing, and for the userspace build where we can't kick
a framebuffer driver off the device.
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c | 6 | ||||
| -rw-r--r-- | drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.h | 1 |
2 files changed, 7 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c index 6d8f21290aa2..676c167c95b9 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.c @@ -24,6 +24,7 @@ #include "gf100.h" #include <core/gpuobj.h> +#include <core/option.h> #include <subdev/fb.h> #include <subdev/mmu.h> @@ -59,6 +60,8 @@ gf100_bar_ctor_vm(struct gf100_bar *bar, struct gf100_bar_vm *bar_vm, return ret; bar_len = device->func->resource_size(device, bar_nr); + if (bar_nr == 3 && bar->bar2_halve) + bar_len >>= 1; ret = nvkm_vm_new(device, 0, bar_len, 0, key, &vm); if (ret) @@ -129,6 +132,8 @@ gf100_bar_init(struct nvkm_bar *base) if (bar->bar[0].mem) { addr = nvkm_memory_addr(bar->bar[0].mem) >> 12; + if (bar->bar2_halve) + addr |= 0x40000000; nvkm_wr32(device, 0x001714, 0x80000000 | addr); } @@ -161,6 +166,7 @@ gf100_bar_new_(const struct nvkm_bar_func *func, struct nvkm_device *device, if (!(bar = kzalloc(sizeof(*bar), GFP_KERNEL))) return -ENOMEM; nvkm_bar_ctor(func, device, index, &bar->base); + bar->bar2_halve = nvkm_boolopt(device->cfgopt, "NvBar2Halve", false); *pbar = &bar->base; return 0; } diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.h b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.h index f7dea69640d8..20a5255362ba 100644 --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.h +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bar/gf100.h @@ -11,6 +11,7 @@ struct gf100_bar_vm { struct gf100_bar { struct nvkm_bar base; + bool bar2_halve; struct gf100_bar_vm bar[2]; }; |