Loading...
Note: File does not exist in v4.6.
1/*
2 * Copyright 2010 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
21 *
22 * Authors: Ben Skeggs
23 */
24
25#include "drmP.h"
26#include "nouveau_drv.h"
27#include "nouveau_mm.h"
28#include "nouveau_vm.h"
29
30void
31nouveau_vm_map_at(struct nouveau_vma *vma, u64 delta, struct nouveau_mem *node)
32{
33 struct nouveau_vm *vm = vma->vm;
34 struct nouveau_mm_node *r;
35 int big = vma->node->type != vm->spg_shift;
36 u32 offset = vma->node->offset + (delta >> 12);
37 u32 bits = vma->node->type - 12;
38 u32 pde = (offset >> vm->pgt_bits) - vm->fpde;
39 u32 pte = (offset & ((1 << vm->pgt_bits) - 1)) >> bits;
40 u32 max = 1 << (vm->pgt_bits - bits);
41 u32 end, len;
42
43 delta = 0;
44 list_for_each_entry(r, &node->regions, rl_entry) {
45 u64 phys = (u64)r->offset << 12;
46 u32 num = r->length >> bits;
47
48 while (num) {
49 struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big];
50
51 end = (pte + num);
52 if (unlikely(end >= max))
53 end = max;
54 len = end - pte;
55
56 vm->map(vma, pgt, node, pte, len, phys, delta);
57
58 num -= len;
59 pte += len;
60 if (unlikely(end >= max)) {
61 phys += len << (bits + 12);
62 pde++;
63 pte = 0;
64 }
65
66 delta += (u64)len << vma->node->type;
67 }
68 }
69
70 vm->flush(vm);
71}
72
73void
74nouveau_vm_map(struct nouveau_vma *vma, struct nouveau_mem *node)
75{
76 nouveau_vm_map_at(vma, 0, node);
77}
78
79void
80nouveau_vm_map_sg(struct nouveau_vma *vma, u64 delta, u64 length,
81 struct nouveau_mem *mem, dma_addr_t *list)
82{
83 struct nouveau_vm *vm = vma->vm;
84 int big = vma->node->type != vm->spg_shift;
85 u32 offset = vma->node->offset + (delta >> 12);
86 u32 bits = vma->node->type - 12;
87 u32 num = length >> vma->node->type;
88 u32 pde = (offset >> vm->pgt_bits) - vm->fpde;
89 u32 pte = (offset & ((1 << vm->pgt_bits) - 1)) >> bits;
90 u32 max = 1 << (vm->pgt_bits - bits);
91 u32 end, len;
92
93 while (num) {
94 struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big];
95
96 end = (pte + num);
97 if (unlikely(end >= max))
98 end = max;
99 len = end - pte;
100
101 vm->map_sg(vma, pgt, mem, pte, len, list);
102
103 num -= len;
104 pte += len;
105 list += len;
106 if (unlikely(end >= max)) {
107 pde++;
108 pte = 0;
109 }
110 }
111
112 vm->flush(vm);
113}
114
115void
116nouveau_vm_unmap_at(struct nouveau_vma *vma, u64 delta, u64 length)
117{
118 struct nouveau_vm *vm = vma->vm;
119 int big = vma->node->type != vm->spg_shift;
120 u32 offset = vma->node->offset + (delta >> 12);
121 u32 bits = vma->node->type - 12;
122 u32 num = length >> vma->node->type;
123 u32 pde = (offset >> vm->pgt_bits) - vm->fpde;
124 u32 pte = (offset & ((1 << vm->pgt_bits) - 1)) >> bits;
125 u32 max = 1 << (vm->pgt_bits - bits);
126 u32 end, len;
127
128 while (num) {
129 struct nouveau_gpuobj *pgt = vm->pgt[pde].obj[big];
130
131 end = (pte + num);
132 if (unlikely(end >= max))
133 end = max;
134 len = end - pte;
135
136 vm->unmap(pgt, pte, len);
137
138 num -= len;
139 pte += len;
140 if (unlikely(end >= max)) {
141 pde++;
142 pte = 0;
143 }
144 }
145
146 vm->flush(vm);
147}
148
149void
150nouveau_vm_unmap(struct nouveau_vma *vma)
151{
152 nouveau_vm_unmap_at(vma, 0, (u64)vma->node->length << 12);
153}
154
155static void
156nouveau_vm_unmap_pgt(struct nouveau_vm *vm, int big, u32 fpde, u32 lpde)
157{
158 struct nouveau_vm_pgd *vpgd;
159 struct nouveau_vm_pgt *vpgt;
160 struct nouveau_gpuobj *pgt;
161 u32 pde;
162
163 for (pde = fpde; pde <= lpde; pde++) {
164 vpgt = &vm->pgt[pde - vm->fpde];
165 if (--vpgt->refcount[big])
166 continue;
167
168 pgt = vpgt->obj[big];
169 vpgt->obj[big] = NULL;
170
171 list_for_each_entry(vpgd, &vm->pgd_list, head) {
172 vm->map_pgt(vpgd->obj, pde, vpgt->obj);
173 }
174
175 mutex_unlock(&vm->mm->mutex);
176 nouveau_gpuobj_ref(NULL, &pgt);
177 mutex_lock(&vm->mm->mutex);
178 }
179}
180
181static int
182nouveau_vm_map_pgt(struct nouveau_vm *vm, u32 pde, u32 type)
183{
184 struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde];
185 struct nouveau_vm_pgd *vpgd;
186 struct nouveau_gpuobj *pgt;
187 int big = (type != vm->spg_shift);
188 u32 pgt_size;
189 int ret;
190
191 pgt_size = (1 << (vm->pgt_bits + 12)) >> type;
192 pgt_size *= 8;
193
194 mutex_unlock(&vm->mm->mutex);
195 ret = nouveau_gpuobj_new(vm->dev, NULL, pgt_size, 0x1000,
196 NVOBJ_FLAG_ZERO_ALLOC, &pgt);
197 mutex_lock(&vm->mm->mutex);
198 if (unlikely(ret))
199 return ret;
200
201 /* someone beat us to filling the PDE while we didn't have the lock */
202 if (unlikely(vpgt->refcount[big]++)) {
203 mutex_unlock(&vm->mm->mutex);
204 nouveau_gpuobj_ref(NULL, &pgt);
205 mutex_lock(&vm->mm->mutex);
206 return 0;
207 }
208
209 vpgt->obj[big] = pgt;
210 list_for_each_entry(vpgd, &vm->pgd_list, head) {
211 vm->map_pgt(vpgd->obj, pde, vpgt->obj);
212 }
213
214 return 0;
215}
216
217int
218nouveau_vm_get(struct nouveau_vm *vm, u64 size, u32 page_shift,
219 u32 access, struct nouveau_vma *vma)
220{
221 u32 align = (1 << page_shift) >> 12;
222 u32 msize = size >> 12;
223 u32 fpde, lpde, pde;
224 int ret;
225
226 mutex_lock(&vm->mm->mutex);
227 ret = nouveau_mm_get(vm->mm, page_shift, msize, 0, align, &vma->node);
228 if (unlikely(ret != 0)) {
229 mutex_unlock(&vm->mm->mutex);
230 return ret;
231 }
232
233 fpde = (vma->node->offset >> vm->pgt_bits);
234 lpde = (vma->node->offset + vma->node->length - 1) >> vm->pgt_bits;
235 for (pde = fpde; pde <= lpde; pde++) {
236 struct nouveau_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde];
237 int big = (vma->node->type != vm->spg_shift);
238
239 if (likely(vpgt->refcount[big])) {
240 vpgt->refcount[big]++;
241 continue;
242 }
243
244 ret = nouveau_vm_map_pgt(vm, pde, vma->node->type);
245 if (ret) {
246 if (pde != fpde)
247 nouveau_vm_unmap_pgt(vm, big, fpde, pde - 1);
248 nouveau_mm_put(vm->mm, vma->node);
249 mutex_unlock(&vm->mm->mutex);
250 vma->node = NULL;
251 return ret;
252 }
253 }
254 mutex_unlock(&vm->mm->mutex);
255
256 vma->vm = vm;
257 vma->offset = (u64)vma->node->offset << 12;
258 vma->access = access;
259 return 0;
260}
261
262void
263nouveau_vm_put(struct nouveau_vma *vma)
264{
265 struct nouveau_vm *vm = vma->vm;
266 u32 fpde, lpde;
267
268 if (unlikely(vma->node == NULL))
269 return;
270 fpde = (vma->node->offset >> vm->pgt_bits);
271 lpde = (vma->node->offset + vma->node->length - 1) >> vm->pgt_bits;
272
273 mutex_lock(&vm->mm->mutex);
274 nouveau_vm_unmap_pgt(vm, vma->node->type != vm->spg_shift, fpde, lpde);
275 nouveau_mm_put(vm->mm, vma->node);
276 vma->node = NULL;
277 mutex_unlock(&vm->mm->mutex);
278}
279
280int
281nouveau_vm_new(struct drm_device *dev, u64 offset, u64 length, u64 mm_offset,
282 struct nouveau_vm **pvm)
283{
284 struct drm_nouveau_private *dev_priv = dev->dev_private;
285 struct nouveau_vm *vm;
286 u64 mm_length = (offset + length) - mm_offset;
287 u32 block, pgt_bits;
288 int ret;
289
290 vm = kzalloc(sizeof(*vm), GFP_KERNEL);
291 if (!vm)
292 return -ENOMEM;
293
294 if (dev_priv->card_type == NV_50) {
295 vm->map_pgt = nv50_vm_map_pgt;
296 vm->map = nv50_vm_map;
297 vm->map_sg = nv50_vm_map_sg;
298 vm->unmap = nv50_vm_unmap;
299 vm->flush = nv50_vm_flush;
300 vm->spg_shift = 12;
301 vm->lpg_shift = 16;
302
303 pgt_bits = 29;
304 block = (1 << pgt_bits);
305 if (length < block)
306 block = length;
307
308 } else
309 if (dev_priv->card_type == NV_C0) {
310 vm->map_pgt = nvc0_vm_map_pgt;
311 vm->map = nvc0_vm_map;
312 vm->map_sg = nvc0_vm_map_sg;
313 vm->unmap = nvc0_vm_unmap;
314 vm->flush = nvc0_vm_flush;
315 vm->spg_shift = 12;
316 vm->lpg_shift = 17;
317 pgt_bits = 27;
318 block = 4096;
319 } else {
320 kfree(vm);
321 return -ENOSYS;
322 }
323
324 vm->fpde = offset >> pgt_bits;
325 vm->lpde = (offset + length - 1) >> pgt_bits;
326 vm->pgt = kcalloc(vm->lpde - vm->fpde + 1, sizeof(*vm->pgt), GFP_KERNEL);
327 if (!vm->pgt) {
328 kfree(vm);
329 return -ENOMEM;
330 }
331
332 INIT_LIST_HEAD(&vm->pgd_list);
333 vm->dev = dev;
334 vm->refcount = 1;
335 vm->pgt_bits = pgt_bits - 12;
336
337 ret = nouveau_mm_init(&vm->mm, mm_offset >> 12, mm_length >> 12,
338 block >> 12);
339 if (ret) {
340 kfree(vm);
341 return ret;
342 }
343
344 *pvm = vm;
345 return 0;
346}
347
348static int
349nouveau_vm_link(struct nouveau_vm *vm, struct nouveau_gpuobj *pgd)
350{
351 struct nouveau_vm_pgd *vpgd;
352 int i;
353
354 if (!pgd)
355 return 0;
356
357 vpgd = kzalloc(sizeof(*vpgd), GFP_KERNEL);
358 if (!vpgd)
359 return -ENOMEM;
360
361 nouveau_gpuobj_ref(pgd, &vpgd->obj);
362
363 mutex_lock(&vm->mm->mutex);
364 for (i = vm->fpde; i <= vm->lpde; i++)
365 vm->map_pgt(pgd, i, vm->pgt[i - vm->fpde].obj);
366 list_add(&vpgd->head, &vm->pgd_list);
367 mutex_unlock(&vm->mm->mutex);
368 return 0;
369}
370
371static void
372nouveau_vm_unlink(struct nouveau_vm *vm, struct nouveau_gpuobj *mpgd)
373{
374 struct nouveau_vm_pgd *vpgd, *tmp;
375 struct nouveau_gpuobj *pgd = NULL;
376
377 if (!mpgd)
378 return;
379
380 mutex_lock(&vm->mm->mutex);
381 list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) {
382 if (vpgd->obj == mpgd) {
383 pgd = vpgd->obj;
384 list_del(&vpgd->head);
385 kfree(vpgd);
386 break;
387 }
388 }
389 mutex_unlock(&vm->mm->mutex);
390
391 nouveau_gpuobj_ref(NULL, &pgd);
392}
393
394static void
395nouveau_vm_del(struct nouveau_vm *vm)
396{
397 struct nouveau_vm_pgd *vpgd, *tmp;
398
399 list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) {
400 nouveau_vm_unlink(vm, vpgd->obj);
401 }
402
403 nouveau_mm_fini(&vm->mm);
404 kfree(vm->pgt);
405 kfree(vm);
406}
407
408int
409nouveau_vm_ref(struct nouveau_vm *ref, struct nouveau_vm **ptr,
410 struct nouveau_gpuobj *pgd)
411{
412 struct nouveau_vm *vm;
413 int ret;
414
415 vm = ref;
416 if (vm) {
417 ret = nouveau_vm_link(vm, pgd);
418 if (ret)
419 return ret;
420
421 vm->refcount++;
422 }
423
424 vm = *ptr;
425 *ptr = ref;
426
427 if (vm) {
428 nouveau_vm_unlink(vm, pgd);
429
430 if (--vm->refcount == 0)
431 nouveau_vm_del(vm);
432 }
433
434 return 0;
435}