1 /* $NetBSD: nouveau_nvkm_subdev_mmu_vmmnv50.c,v 1.3 2021/12/19 10:51:58 riastradh Exp $ */
2
3 /*
4 * Copyright 2017 Red Hat Inc.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24 #include <sys/cdefs.h>
25 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_mmu_vmmnv50.c,v 1.3 2021/12/19 10:51:58 riastradh Exp $");
26
27 #include "vmm.h"
28
29 #include <subdev/fb.h>
30 #include <subdev/timer.h>
31 #include <engine/gr.h>
32
33 #include <nvif/if500d.h>
34 #include <nvif/unpack.h>
35
36 static inline void
nv50_vmm_pgt_pte(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes,struct nvkm_vmm_map * map,u64 addr)37 nv50_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
38 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
39 {
40 u64 next = addr + map->type, data;
41 u32 pten;
42 int log2blk;
43
44 map->type += ptes * map->ctag;
45
46 while (ptes) {
47 for (log2blk = 7; log2blk >= 0; log2blk--) {
48 pten = 1 << log2blk;
49 if (ptes >= pten && IS_ALIGNED(ptei, pten))
50 break;
51 }
52
53 data = next | (log2blk << 7);
54 next += pten * map->next;
55 ptes -= pten;
56
57 while (pten--)
58 VMM_WO064(pt, vmm, ptei++ * 8, data);
59 }
60 }
61
62 #ifndef __NetBSD__
63 static void
nv50_vmm_pgt_sgl(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes,struct nvkm_vmm_map * map)64 nv50_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
65 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
66 {
67 VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
68 }
69 #endif
70
71 static void
nv50_vmm_pgt_dma(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes,struct nvkm_vmm_map * map)72 nv50_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
73 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
74 {
75 if (map->page->shift == PAGE_SHIFT) {
76 VMM_SPAM(vmm, "DMAA %08x %08x PTE(s)", ptei, ptes);
77 nvkm_kmap(pt->memory);
78 while (ptes--) {
79 const u64 data = *map->dma++ + map->type;
80 VMM_WO064(pt, vmm, ptei++ * 8, data);
81 map->type += map->ctag;
82 }
83 nvkm_done(pt->memory);
84 return;
85 }
86
87 VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
88 }
89
90 static void
nv50_vmm_pgt_mem(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes,struct nvkm_vmm_map * map)91 nv50_vmm_pgt_mem(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
92 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
93 {
94 VMM_MAP_ITER_MEM(vmm, pt, ptei, ptes, map, nv50_vmm_pgt_pte);
95 }
96
97 static void
nv50_vmm_pgt_unmap(struct nvkm_vmm * vmm,struct nvkm_mmu_pt * pt,u32 ptei,u32 ptes)98 nv50_vmm_pgt_unmap(struct nvkm_vmm *vmm,
99 struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
100 {
101 VMM_FO064(pt, vmm, ptei * 8, 0ULL, ptes);
102 }
103
104 static const struct nvkm_vmm_desc_func
105 nv50_vmm_pgt = {
106 .unmap = nv50_vmm_pgt_unmap,
107 .mem = nv50_vmm_pgt_mem,
108 .dma = nv50_vmm_pgt_dma,
109 #ifndef __NetBSD__
110 .sgl = nv50_vmm_pgt_sgl,
111 #endif
112 };
113
114 static bool
nv50_vmm_pde(struct nvkm_vmm * vmm,struct nvkm_vmm_pt * pgt,u64 * pdata)115 nv50_vmm_pde(struct nvkm_vmm *vmm, struct nvkm_vmm_pt *pgt, u64 *pdata)
116 {
117 struct nvkm_mmu_pt *pt;
118 u64 data = 0xdeadcafe00000000ULL;
119 if (pgt && (pt = pgt->pt[0])) {
120 switch (pgt->page) {
121 case 16: data = 0x00000001; break;
122 case 12: data = 0x00000003;
123 switch (nvkm_memory_size(pt->memory)) {
124 case 0x100000: data |= 0x00000000; break;
125 case 0x040000: data |= 0x00000020; break;
126 case 0x020000: data |= 0x00000040; break;
127 case 0x010000: data |= 0x00000060; break;
128 default:
129 WARN_ON(1);
130 return false;
131 }
132 break;
133 default:
134 WARN_ON(1);
135 return false;
136 }
137
138 switch (nvkm_memory_target(pt->memory)) {
139 case NVKM_MEM_TARGET_VRAM: data |= 0x00000000; break;
140 case NVKM_MEM_TARGET_HOST: data |= 0x00000008; break;
141 case NVKM_MEM_TARGET_NCOH: data |= 0x0000000c; break;
142 default:
143 WARN_ON(1);
144 return false;
145 }
146
147 data |= pt->addr;
148 }
149 *pdata = data;
150 return true;
151 }
152
153 static void
nv50_vmm_pgd_pde(struct nvkm_vmm * vmm,struct nvkm_vmm_pt * pgd,u32 pdei)154 nv50_vmm_pgd_pde(struct nvkm_vmm *vmm, struct nvkm_vmm_pt *pgd, u32 pdei)
155 {
156 struct nvkm_vmm_join *join;
157 u32 pdeo = vmm->mmu->func->vmm.pd_offset + (pdei * 8);
158 u64 data;
159
160 if (!nv50_vmm_pde(vmm, pgd->pde[pdei], &data))
161 return;
162
163 list_for_each_entry(join, &vmm->join, head) {
164 nvkm_kmap(join->inst);
165 nvkm_wo64(join->inst, pdeo, data);
166 nvkm_done(join->inst);
167 }
168 }
169
170 static const struct nvkm_vmm_desc_func
171 nv50_vmm_pgd = {
172 .pde = nv50_vmm_pgd_pde,
173 };
174
175 const struct nvkm_vmm_desc
176 nv50_vmm_desc_12[] = {
177 { PGT, 17, 8, 0x1000, &nv50_vmm_pgt },
178 { PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
179 {}
180 };
181
182 const struct nvkm_vmm_desc
183 nv50_vmm_desc_16[] = {
184 { PGT, 13, 8, 0x1000, &nv50_vmm_pgt },
185 { PGD, 11, 0, 0x0000, &nv50_vmm_pgd },
186 {}
187 };
188
189 void
nv50_vmm_flush(struct nvkm_vmm * vmm,int level)190 nv50_vmm_flush(struct nvkm_vmm *vmm, int level)
191 {
192 struct nvkm_subdev *subdev = &vmm->mmu->subdev;
193 struct nvkm_device *device = subdev->device;
194 int i, id;
195
196 mutex_lock(&subdev->mutex);
197 for (i = 0; i < NVKM_SUBDEV_NR; i++) {
198 if (!atomic_read(&vmm->engref[i]))
199 continue;
200
201 /* unfortunate hw bug workaround... */
202 if (i == NVKM_ENGINE_GR && device->gr) {
203 int ret = nvkm_gr_tlb_flush(device->gr);
204 if (ret != -ENODEV)
205 continue;
206 }
207
208 switch (i) {
209 case NVKM_ENGINE_GR : id = 0x00; break;
210 case NVKM_ENGINE_VP :
211 case NVKM_ENGINE_MSPDEC: id = 0x01; break;
212 case NVKM_SUBDEV_BAR : id = 0x06; break;
213 case NVKM_ENGINE_MSPPP :
214 case NVKM_ENGINE_MPEG : id = 0x08; break;
215 case NVKM_ENGINE_BSP :
216 case NVKM_ENGINE_MSVLD : id = 0x09; break;
217 case NVKM_ENGINE_CIPHER:
218 case NVKM_ENGINE_SEC : id = 0x0a; break;
219 case NVKM_ENGINE_CE0 : id = 0x0d; break;
220 default:
221 continue;
222 }
223
224 nvkm_wr32(device, 0x100c80, (id << 16) | 1);
225 if (nvkm_msec(device, 2000,
226 if (!(nvkm_rd32(device, 0x100c80) & 0x00000001))
227 break;
228 ) < 0)
229 nvkm_error(subdev, "%s mmu invalidate timeout\n",
230 nvkm_subdev_name[i]);
231 }
232 mutex_unlock(&subdev->mutex);
233 }
234
235 int
nv50_vmm_valid(struct nvkm_vmm * vmm,void * argv,u32 argc,struct nvkm_vmm_map * map)236 nv50_vmm_valid(struct nvkm_vmm *vmm, void *argv, u32 argc,
237 struct nvkm_vmm_map *map)
238 {
239 const struct nvkm_vmm_page *page = map->page;
240 union {
241 struct nv50_vmm_map_vn vn;
242 struct nv50_vmm_map_v0 v0;
243 } *args = argv;
244 struct nvkm_device *device = vmm->mmu->subdev.device;
245 struct nvkm_ram *ram = device->fb->ram;
246 struct nvkm_memory *memory = map->memory;
247 u8 aper, kind, kind_inv, comp, priv, ro;
248 int kindn, ret = -ENOSYS;
249 const u8 *kindm;
250
251 map->type = map->ctag = 0;
252 map->next = 1 << page->shift;
253
254 if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
255 ro = !!args->v0.ro;
256 priv = !!args->v0.priv;
257 kind = args->v0.kind & 0x7f;
258 comp = args->v0.comp & 0x03;
259 } else
260 if (!(ret = nvif_unvers(ret, &argv, &argc, args->vn))) {
261 ro = 0;
262 priv = 0;
263 kind = 0x00;
264 comp = 0;
265 } else {
266 VMM_DEBUG(vmm, "args");
267 return ret;
268 }
269
270 switch (nvkm_memory_target(memory)) {
271 case NVKM_MEM_TARGET_VRAM:
272 if (ram->stolen) {
273 map->type |= ram->stolen;
274 aper = 3;
275 } else {
276 aper = 0;
277 }
278 break;
279 case NVKM_MEM_TARGET_HOST:
280 aper = 2;
281 break;
282 case NVKM_MEM_TARGET_NCOH:
283 aper = 3;
284 break;
285 default:
286 WARN_ON(1);
287 return -EINVAL;
288 }
289
290 kindm = vmm->mmu->func->kind(vmm->mmu, &kindn, &kind_inv);
291 if (kind >= kindn || kindm[kind] == kind_inv) {
292 VMM_DEBUG(vmm, "kind %02x", kind);
293 return -EINVAL;
294 }
295
296 if (map->mem && map->mem->type != kindm[kind]) {
297 VMM_DEBUG(vmm, "kind %02x bankswz: %d %d", kind,
298 kindm[kind], map->mem->type);
299 return -EINVAL;
300 }
301
302 if (comp) {
303 u32 tags = (nvkm_memory_size(memory) >> 16) * comp;
304 if (aper != 0 || !(page->type & NVKM_VMM_PAGE_COMP)) {
305 VMM_DEBUG(vmm, "comp %d %02x", aper, page->type);
306 return -EINVAL;
307 }
308
309 ret = nvkm_memory_tags_get(memory, device, tags, NULL,
310 &map->tags);
311 if (ret) {
312 VMM_DEBUG(vmm, "comp %d", ret);
313 return ret;
314 }
315
316 if (map->tags->mn) {
317 u32 tags = map->tags->mn->offset + (map->offset >> 16);
318 map->ctag |= (u64)comp << 49;
319 map->type |= (u64)comp << 47;
320 map->type |= (u64)tags << 49;
321 map->next |= map->ctag;
322 }
323 }
324
325 map->type |= BIT(0); /* Valid. */
326 map->type |= (u64)ro << 3;
327 map->type |= (u64)aper << 4;
328 map->type |= (u64)priv << 6;
329 map->type |= (u64)kind << 40;
330 return 0;
331 }
332
333 void
nv50_vmm_part(struct nvkm_vmm * vmm,struct nvkm_memory * inst)334 nv50_vmm_part(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
335 {
336 struct nvkm_vmm_join *join;
337
338 list_for_each_entry(join, &vmm->join, head) {
339 if (join->inst == inst) {
340 list_del(&join->head);
341 kfree(join);
342 break;
343 }
344 }
345 }
346
347 int
nv50_vmm_join(struct nvkm_vmm * vmm,struct nvkm_memory * inst)348 nv50_vmm_join(struct nvkm_vmm *vmm, struct nvkm_memory *inst)
349 {
350 const u32 pd_offset = vmm->mmu->func->vmm.pd_offset;
351 struct nvkm_vmm_join *join;
352 int ret = 0;
353 u64 data;
354 u32 pdei;
355
356 if (!(join = kmalloc(sizeof(*join), GFP_KERNEL)))
357 return -ENOMEM;
358 join->inst = inst;
359 list_add_tail(&join->head, &vmm->join);
360
361 nvkm_kmap(join->inst);
362 for (pdei = vmm->start >> 29; pdei <= (vmm->limit - 1) >> 29; pdei++) {
363 if (!nv50_vmm_pde(vmm, vmm->pd->pde[pdei], &data)) {
364 ret = -EINVAL;
365 break;
366 }
367 nvkm_wo64(join->inst, pd_offset + (pdei * 8), data);
368 }
369 nvkm_done(join->inst);
370 return ret;
371 }
372
373 static const struct nvkm_vmm_func
374 nv50_vmm = {
375 .join = nv50_vmm_join,
376 .part = nv50_vmm_part,
377 .valid = nv50_vmm_valid,
378 .flush = nv50_vmm_flush,
379 .page_block = 1 << 29,
380 .page = {
381 { 16, &nv50_vmm_desc_16[0], NVKM_VMM_PAGE_xVxC },
382 { 12, &nv50_vmm_desc_12[0], NVKM_VMM_PAGE_xVHx },
383 {}
384 }
385 };
386
387 int
nv50_vmm_new(struct nvkm_mmu * mmu,bool managed,u64 addr,u64 size,void * argv,u32 argc,struct lock_class_key * key,const char * name,struct nvkm_vmm ** pvmm)388 nv50_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
389 void *argv, u32 argc, struct lock_class_key *key, const char *name,
390 struct nvkm_vmm **pvmm)
391 {
392 return nv04_vmm_new_(&nv50_vmm, mmu, 0, managed, addr, size,
393 argv, argc, key, name, pvmm);
394 }
395