| /* |
| * 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/ltcg.h> |
| #include <subdev/fb.h> |
| #include <subdev/timer.h> |
| |
| struct nvc0_ltcg_priv { |
| struct nouveau_ltcg base; |
| u32 part_nr; |
| u32 subp_nr; |
| u32 num_tags; |
| u32 tag_base; |
| struct nouveau_mm tags; |
| struct nouveau_mm_node *tag_ram; |
| }; |
| |
| static void |
| nvc0_ltcg_subp_isr(struct nvc0_ltcg_priv *priv, int unit, int subp) |
| { |
| u32 subp_base = 0x141000 + (unit * 0x2000) + (subp * 0x400); |
| u32 stat = nv_rd32(priv, subp_base + 0x020); |
| |
| if (stat) { |
| nv_info(priv, "LTC%d_LTS%d: 0x%08x\n", unit, subp, stat); |
| nv_wr32(priv, subp_base + 0x020, stat); |
| } |
| } |
| |
| static void |
| nvc0_ltcg_intr(struct nouveau_subdev *subdev) |
| { |
| struct nvc0_ltcg_priv *priv = (void *)subdev; |
| u32 units; |
| |
| units = nv_rd32(priv, 0x00017c); |
| while (units) { |
| u32 subp, unit = ffs(units) - 1; |
| for (subp = 0; subp < priv->subp_nr; subp++) |
| nvc0_ltcg_subp_isr(priv, unit, subp); |
| units &= ~(1 << unit); |
| } |
| |
| /* 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 |
| 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) { |
| 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; |
| |
| /* 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, 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; |
| } |
| |
| 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); |
| u32 parts, mask; |
| int ret, i; |
| |
| ret = nouveau_ltcg_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->part_nr++; |
| } |
| priv->subp_nr = nv_rd32(priv, 0x17e8dc) >> 28; |
| |
| 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); |
| } |
| |
| static int |
| nvc0_ltcg_init(struct nouveau_object *object) |
| { |
| struct nouveau_ltcg *ltcg = (struct nouveau_ltcg *)object; |
| struct nvc0_ltcg_priv *priv = (struct nvc0_ltcg_priv *)ltcg; |
| int ret; |
| |
| ret = nouveau_ltcg_init(ltcg); |
| if (ret) |
| return ret; |
| |
| nv_mask(priv, 0x17e820, 0x00100000, 0x00000000); /* INTR_EN &= ~0x10 */ |
| nv_wr32(priv, 0x17e8d8, priv->part_nr); |
| if (nv_device(ltcg)->card_type >= NV_E0) |
| nv_wr32(priv, 0x17e000, priv->part_nr); |
| nv_wr32(priv, 0x17e8d4, priv->tag_base); |
| return 0; |
| } |
| |
| struct nouveau_oclass |
| nvc0_ltcg_oclass = { |
| .handle = NV_SUBDEV(LTCG, 0xc0), |
| .ofuncs = &(struct nouveau_ofuncs) { |
| .ctor = nvc0_ltcg_ctor, |
| .dtor = nvc0_ltcg_dtor, |
| .init = nvc0_ltcg_init, |
| .fini = _nouveau_ltcg_fini, |
| }, |
| }; |