diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/ltc/gf100.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/ltc/gf100.c | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/ltc/gf100.c b/drivers/gpu/drm/nouveau/core/subdev/ltc/gf100.c new file mode 100644 index 000000000000..f72ab8191d9d --- /dev/null +++ b/drivers/gpu/drm/nouveau/core/subdev/ltc/gf100.c @@ -0,0 +1,197 @@ +/* + * Copyright 2012 Red Hat Inc. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the "Software"), + * to deal in the Software without restriction, including without limitation + * the rights to use, copy, modify, merge, publish, distribute, sublicense, + * and/or sell copies of the Software, and to permit persons to whom the + * Software is furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR + * OTHER DEALINGS IN THE SOFTWARE. + * + * Authors: Ben Skeggs + */ + +#include <subdev/fb.h> +#include <subdev/timer.h> + +#include "priv.h" + +void +gf100_ltc_cbc_clear(struct nvkm_ltc_priv *priv, u32 start, u32 limit) +{ + nv_wr32(priv, 0x17e8cc, start); + nv_wr32(priv, 0x17e8d0, limit); + nv_wr32(priv, 0x17e8c8, 0x00000004); +} + +void +gf100_ltc_cbc_wait(struct nvkm_ltc_priv *priv) +{ + int c, s; + for (c = 0; c < priv->ltc_nr; c++) { + for (s = 0; s < priv->lts_nr; s++) + nv_wait(priv, 0x1410c8 + c * 0x2000 + s * 0x400, ~0, 0); + } +} + +static void +gf100_ltc_lts_isr(struct nvkm_ltc_priv *priv, int ltc, int lts) +{ + u32 base = 0x141000 + (ltc * 0x2000) + (lts * 0x400); + u32 stat = nv_rd32(priv, base + 0x020); + + if (stat) { + nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", ltc, lts, stat); + nv_wr32(priv, base + 0x020, stat); + } +} + +void +gf100_ltc_intr(struct nouveau_subdev *subdev) +{ + struct nvkm_ltc_priv *priv = (void *)subdev; + u32 mask; + + mask = nv_rd32(priv, 0x00017c); + while (mask) { + u32 lts, ltc = __ffs(mask); + for (lts = 0; lts < priv->lts_nr; lts++) + gf100_ltc_lts_isr(priv, ltc, lts); + mask &= ~(1 << ltc); + } + + /* we do something horribly wrong and upset PMFB a lot, so mask off + * interrupts from it after the first one until it's fixed + */ + nv_mask(priv, 0x000640, 0x02000000, 0x00000000); +} + +static int +gf100_ltc_init(struct nouveau_object *object) +{ + struct nvkm_ltc_priv *priv = (void *)object; + int ret; + + ret = nvkm_ltc_init(priv); + if (ret) + return ret; + + nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */ + nv_wr32(priv, 0x17e8d8, priv->ltc_nr); + nv_wr32(priv, 0x17e8d4, priv->tag_base); + return 0; +} + +void +gf100_ltc_dtor(struct nouveau_object *object) +{ + struct nouveau_fb *pfb = nouveau_fb(object); + struct nvkm_ltc_priv *priv = (void *)object; + + nouveau_mm_fini(&priv->tags); + nouveau_mm_free(&pfb->vram, &priv->tag_ram); + + nvkm_ltc_destroy(priv); +} + +/* TODO: Figure out tag memory details and drop the over-cautious allocation. + */ +int +gf100_ltc_init_tag_ram(struct nouveau_fb *pfb, struct nvkm_ltc_priv *priv) +{ + u32 tag_size, tag_margin, tag_align; + int ret; + + /* tags for 1/4 of VRAM should be enough (8192/4 per GiB of VRAM) */ + priv->num_tags = (pfb->ram->size >> 17) / 4; + if (priv->num_tags > (1 << 17)) + priv->num_tags = 1 << 17; /* we have 17 bits in PTE */ + priv->num_tags = (priv->num_tags + 63) & ~63; /* round up to 64 */ + + tag_align = priv->ltc_nr * 0x800; + tag_margin = (tag_align < 0x6000) ? 0x6000 : tag_align; + + /* 4 part 4 sub: 0x2000 bytes for 56 tags */ + /* 3 part 4 sub: 0x6000 bytes for 168 tags */ + /* + * About 147 bytes per tag. Let's be safe and allocate x2, which makes + * 0x4980 bytes for 64 tags, and round up to 0x6000 bytes for 64 tags. + * + * For 4 GiB of memory we'll have 8192 tags which makes 3 MiB, < 0.1 %. + */ + tag_size = (priv->num_tags / 64) * 0x6000 + tag_margin; + tag_size += tag_align; + tag_size = (tag_size + 0xfff) >> 12; /* round up */ + + ret = nouveau_mm_tail(&pfb->vram, 1, tag_size, tag_size, 1, + &priv->tag_ram); + if (ret) { + priv->num_tags = 0; + } else { + u64 tag_base = (priv->tag_ram->offset << 12) + tag_margin; + + tag_base += tag_align - 1; + ret = do_div(tag_base, tag_align); + + priv->tag_base = tag_base; + } + + ret = nouveau_mm_init(&priv->tags, 0, priv->num_tags, 1); + return ret; +} + +int +gf100_ltc_ctor(struct nouveau_object *parent, struct nouveau_object *engine, + struct nouveau_oclass *oclass, void *data, u32 size, + struct nouveau_object **pobject) +{ + struct nouveau_fb *pfb = nouveau_fb(parent); + struct nvkm_ltc_priv *priv; + u32 parts, mask; + int ret, i; + + ret = nvkm_ltc_create(parent, engine, oclass, &priv); + *pobject = nv_object(priv); + if (ret) + return ret; + + parts = nv_rd32(priv, 0x022438); + mask = nv_rd32(priv, 0x022554); + for (i = 0; i < parts; i++) { + if (!(mask & (1 << i))) + priv->ltc_nr++; + } + priv->lts_nr = nv_rd32(priv, 0x17e8dc) >> 28; + + ret = gf100_ltc_init_tag_ram(pfb, priv); + if (ret) + return ret; + + nv_subdev(priv)->intr = gf100_ltc_intr; + return 0; +} + +struct nouveau_oclass * +gf100_ltc_oclass = &(struct nvkm_ltc_impl) { + .base.handle = NV_SUBDEV(LTC, 0xc0), + .base.ofuncs = &(struct nouveau_ofuncs) { + .ctor = gf100_ltc_ctor, + .dtor = gf100_ltc_dtor, + .init = gf100_ltc_init, + .fini = _nvkm_ltc_fini, + }, + .intr = gf100_ltc_intr, + .cbc_clear = gf100_ltc_cbc_clear, + .cbc_wait = gf100_ltc_cbc_wait, +}.base; |