diff options
Diffstat (limited to 'drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c')
| -rw-r--r-- | drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c | 129 |
1 files changed, 127 insertions, 2 deletions
diff --git a/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c b/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c index 078a2b9d6bd..e4940fb166e 100644 --- a/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c +++ b/drivers/gpu/drm/nouveau/core/subdev/ltcg/nvc0.c @@ -23,10 +23,17 @@ */ #include <subdev/ltcg.h> +#include <subdev/fb.h> +#include <subdev/timer.h> struct nvc0_ltcg_priv { struct nouveau_ltcg base; + u32 part_nr; + u32 part_mask; u32 subp_nr; + struct nouveau_mm tags; + u32 num_tags; + struct nouveau_mm_node *tag_ram; }; static void @@ -62,11 +69,104 @@ nvc0_ltcg_intr(struct nouveau_subdev *subdev) } static int +nvc0_ltcg_tags_alloc(struct nouveau_ltcg *ltcg, u32 n, + struct nouveau_mm_node **pnode) +{ + struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; + int ret; + + ret = nouveau_mm_head(&priv->tags, 1, n, n, 1, pnode); + if (ret) + *pnode = NULL; + + return ret; +} + +static void +nvc0_ltcg_tags_free(struct nouveau_ltcg *ltcg, struct nouveau_mm_node **pnode) +{ + struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; + + nouveau_mm_free(&priv->tags, pnode); +} + +static void +nvc0_ltcg_tags_clear(struct nouveau_ltcg *ltcg, u32 first, u32 count) +{ + struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; + u32 last = first + count - 1; + int p, i; + + BUG_ON((first > last) || (last >= priv->num_tags)); + + nv_wr32(priv, 0x17e8cc, first); + nv_wr32(priv, 0x17e8d0, last); + nv_wr32(priv, 0x17e8c8, 0x4); /* trigger clear */ + + /* wait until it's finished with clearing */ + for (p = 0; p < priv->part_nr; ++p) { + if (!(priv->part_mask & (1 << p))) + continue; + for (i = 0; i < priv->subp_nr; ++i) + nv_wait(priv, 0x1410c8 + p * 0x2000 + i * 0x400, ~0, 0); + } +} + +/* TODO: Figure out tag memory details and drop the over-cautious allocation. + */ +static int +nvc0_ltcg_init_tag_ram(struct nouveau_fb *pfb, struct nvc0_ltcg_priv *priv) +{ + u32 tag_size, tag_margin, tag_align; + int ret; + + nv_wr32(priv, 0x17e8d8, priv->part_nr); + + /* 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->part_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, 0, 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); + + nv_wr32(priv, 0x17e8d4, tag_base); + } + ret = nouveau_mm_init(&priv->tags, 0, priv->num_tags, 1); + + return ret; +} + +static int nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine, struct nouveau_oclass *oclass, void *data, u32 size, struct nouveau_object **pobject) { struct nvc0_ltcg_priv *priv; + struct nouveau_fb *pfb = nouveau_fb(parent); int ret; ret = nouveau_ltcg_create(parent, engine, oclass, &priv); @@ -74,19 +174,44 @@ nvc0_ltcg_ctor(struct nouveau_object *parent, struct nouveau_object *engine, if (ret) return ret; - priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 24; + priv->part_nr = nv_rd32(priv, 0x022438); + priv->part_mask = nv_rd32(priv, 0x022554); + + priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 28; + nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */ + ret = nvc0_ltcg_init_tag_ram(pfb, priv); + if (ret) + return ret; + + priv->base.tags_alloc = nvc0_ltcg_tags_alloc; + priv->base.tags_free = nvc0_ltcg_tags_free; + priv->base.tags_clear = nvc0_ltcg_tags_clear; + nv_subdev(priv)->intr = nvc0_ltcg_intr; return 0; } +static void +nvc0_ltcg_dtor(struct nouveau_object *object) +{ + struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object; + struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; + struct nouveau_fb *pfb = nouveau_fb(ltcg->base.base.parent); + + nouveau_mm_fini(&priv->tags); + nouveau_mm_free(&pfb->vram, &priv->tag_ram); + + nouveau_ltcg_destroy(ltcg); +} + struct nouveau_oclass nvc0_ltcg_oclass = { .handle = NV_SUBDEV(LTCG, 0xc0), .ofuncs = &(struct nouveau_ofuncs) { .ctor = nvc0_ltcg_ctor, - .dtor = _nouveau_ltcg_dtor, + .dtor = nvc0_ltcg_dtor, .init = _nouveau_ltcg_init, .fini = _nouveau_ltcg_fini, }, |