2 * Copyright 2010 Red Hat Inc.
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:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
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.
26 #include <core/gpuobj.h>
27 #include <subdev/fb.h>
30 nvkm_vm_map_at(struct nvkm_vma *vma, u64 delta, struct nvkm_mem *node)
32 struct nvkm_vm *vm = vma->vm;
33 struct nvkm_mmu *mmu = vm->mmu;
34 struct nvkm_mm_node *r;
35 int big = vma->node->type != mmu->func->spg_shift;
36 u32 offset = vma->node->offset + (delta >> 12);
37 u32 bits = vma->node->type - 12;
38 u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde;
39 u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits;
40 u32 max = 1 << (mmu->func->pgt_bits - bits);
44 list_for_each_entry(r, &node->regions, rl_entry) {
45 u64 phys = (u64)r->offset << 12;
46 u32 num = r->length >> bits;
49 struct nvkm_memory *pgt = vm->pgt[pde].mem[big];
52 if (unlikely(end >= max))
56 mmu->func->map(vma, pgt, node, pte, len, phys, delta);
60 if (unlikely(end >= max)) {
61 phys += len << (bits + 12);
66 delta += (u64)len << vma->node->type;
74 nvkm_vm_map_sg_table(struct nvkm_vma *vma, u64 delta, u64 length,
77 struct nvkm_vm *vm = vma->vm;
78 struct nvkm_mmu *mmu = vm->mmu;
79 int big = vma->node->type != mmu->func->spg_shift;
80 u32 offset = vma->node->offset + (delta >> 12);
81 u32 bits = vma->node->type - 12;
82 u32 num = length >> vma->node->type;
83 u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde;
84 u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits;
85 u32 max = 1 << (mmu->func->pgt_bits - bits);
89 struct scatterlist *sg;
91 for_each_sg(mem->sg->sgl, sg, mem->sg->nents, i) {
92 struct nvkm_memory *pgt = vm->pgt[pde].mem[big];
93 sglen = sg_dma_len(sg) >> PAGE_SHIFT;
96 if (unlikely(end >= max))
100 for (m = 0; m < len; m++) {
101 dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
103 mmu->func->map_sg(vma, pgt, mem, pte, 1, &addr);
110 if (unlikely(end >= max)) {
115 for (; m < sglen; m++) {
116 dma_addr_t addr = sg_dma_address(sg) + (m << PAGE_SHIFT);
118 mmu->func->map_sg(vma, pgt, mem, pte, 1, &addr);
128 mmu->func->flush(vm);
132 nvkm_vm_map_sg(struct nvkm_vma *vma, u64 delta, u64 length,
133 struct nvkm_mem *mem)
135 struct nvkm_vm *vm = vma->vm;
136 struct nvkm_mmu *mmu = vm->mmu;
137 dma_addr_t *list = mem->pages;
138 int big = vma->node->type != mmu->func->spg_shift;
139 u32 offset = vma->node->offset + (delta >> 12);
140 u32 bits = vma->node->type - 12;
141 u32 num = length >> vma->node->type;
142 u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde;
143 u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits;
144 u32 max = 1 << (mmu->func->pgt_bits - bits);
148 struct nvkm_memory *pgt = vm->pgt[pde].mem[big];
151 if (unlikely(end >= max))
155 mmu->func->map_sg(vma, pgt, mem, pte, len, list);
160 if (unlikely(end >= max)) {
166 mmu->func->flush(vm);
170 nvkm_vm_map(struct nvkm_vma *vma, struct nvkm_mem *node)
173 nvkm_vm_map_sg_table(vma, 0, node->size << 12, node);
176 nvkm_vm_map_sg(vma, 0, node->size << 12, node);
178 nvkm_vm_map_at(vma, 0, node);
182 nvkm_vm_unmap_at(struct nvkm_vma *vma, u64 delta, u64 length)
184 struct nvkm_vm *vm = vma->vm;
185 struct nvkm_mmu *mmu = vm->mmu;
186 int big = vma->node->type != mmu->func->spg_shift;
187 u32 offset = vma->node->offset + (delta >> 12);
188 u32 bits = vma->node->type - 12;
189 u32 num = length >> vma->node->type;
190 u32 pde = (offset >> mmu->func->pgt_bits) - vm->fpde;
191 u32 pte = (offset & ((1 << mmu->func->pgt_bits) - 1)) >> bits;
192 u32 max = 1 << (mmu->func->pgt_bits - bits);
196 struct nvkm_memory *pgt = vm->pgt[pde].mem[big];
199 if (unlikely(end >= max))
203 mmu->func->unmap(vma, pgt, pte, len);
207 if (unlikely(end >= max)) {
213 mmu->func->flush(vm);
217 nvkm_vm_unmap(struct nvkm_vma *vma)
219 nvkm_vm_unmap_at(vma, 0, (u64)vma->node->length << 12);
223 nvkm_vm_unmap_pgt(struct nvkm_vm *vm, int big, u32 fpde, u32 lpde)
225 struct nvkm_mmu *mmu = vm->mmu;
226 struct nvkm_vm_pgd *vpgd;
227 struct nvkm_vm_pgt *vpgt;
228 struct nvkm_memory *pgt;
231 for (pde = fpde; pde <= lpde; pde++) {
232 vpgt = &vm->pgt[pde - vm->fpde];
233 if (--vpgt->refcount[big])
236 pgt = vpgt->mem[big];
237 vpgt->mem[big] = NULL;
239 list_for_each_entry(vpgd, &vm->pgd_list, head) {
240 mmu->func->map_pgt(vpgd->obj, pde, vpgt->mem);
243 mmu->func->flush(vm);
245 nvkm_memory_del(&pgt);
250 nvkm_vm_map_pgt(struct nvkm_vm *vm, u32 pde, u32 type)
252 struct nvkm_mmu *mmu = vm->mmu;
253 struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde];
254 struct nvkm_vm_pgd *vpgd;
255 int big = (type != mmu->func->spg_shift);
259 pgt_size = (1 << (mmu->func->pgt_bits + 12)) >> type;
262 ret = nvkm_memory_new(mmu->subdev.device, NVKM_MEM_TARGET_INST,
263 pgt_size, 0x1000, true, &vpgt->mem[big]);
267 list_for_each_entry(vpgd, &vm->pgd_list, head) {
268 mmu->func->map_pgt(vpgd->obj, pde, vpgt->mem);
271 vpgt->refcount[big]++;
276 nvkm_vm_get(struct nvkm_vm *vm, u64 size, u32 page_shift, u32 access,
277 struct nvkm_vma *vma)
279 struct nvkm_mmu *mmu = vm->mmu;
280 u32 align = (1 << page_shift) >> 12;
281 u32 msize = size >> 12;
285 mutex_lock(&vm->mutex);
286 ret = nvkm_mm_head(&vm->mm, 0, page_shift, msize, msize, align,
288 if (unlikely(ret != 0)) {
289 mutex_unlock(&vm->mutex);
293 fpde = (vma->node->offset >> mmu->func->pgt_bits);
294 lpde = (vma->node->offset + vma->node->length - 1) >> mmu->func->pgt_bits;
296 for (pde = fpde; pde <= lpde; pde++) {
297 struct nvkm_vm_pgt *vpgt = &vm->pgt[pde - vm->fpde];
298 int big = (vma->node->type != mmu->func->spg_shift);
300 if (likely(vpgt->refcount[big])) {
301 vpgt->refcount[big]++;
305 ret = nvkm_vm_map_pgt(vm, pde, vma->node->type);
308 nvkm_vm_unmap_pgt(vm, big, fpde, pde - 1);
309 nvkm_mm_free(&vm->mm, &vma->node);
310 mutex_unlock(&vm->mutex);
314 mutex_unlock(&vm->mutex);
317 nvkm_vm_ref(vm, &vma->vm, NULL);
318 vma->offset = (u64)vma->node->offset << 12;
319 vma->access = access;
324 nvkm_vm_put(struct nvkm_vma *vma)
326 struct nvkm_mmu *mmu;
330 if (unlikely(vma->node == NULL))
335 fpde = (vma->node->offset >> mmu->func->pgt_bits);
336 lpde = (vma->node->offset + vma->node->length - 1) >> mmu->func->pgt_bits;
338 mutex_lock(&vm->mutex);
339 nvkm_vm_unmap_pgt(vm, vma->node->type != mmu->func->spg_shift, fpde, lpde);
340 nvkm_mm_free(&vm->mm, &vma->node);
341 mutex_unlock(&vm->mutex);
343 nvkm_vm_ref(NULL, &vma->vm, NULL);
347 nvkm_vm_boot(struct nvkm_vm *vm, u64 size)
349 struct nvkm_mmu *mmu = vm->mmu;
350 struct nvkm_memory *pgt;
353 ret = nvkm_memory_new(mmu->subdev.device, NVKM_MEM_TARGET_INST,
354 (size >> mmu->func->spg_shift) * 8, 0x1000, true, &pgt);
356 vm->pgt[0].refcount[0] = 1;
357 vm->pgt[0].mem[0] = pgt;
358 nvkm_memory_boot(pgt, vm);
365 nvkm_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length, u64 mm_offset,
366 u32 block, struct lock_class_key *key, struct nvkm_vm **pvm)
368 static struct lock_class_key _key;
370 u64 mm_length = (offset + length) - mm_offset;
373 vm = kzalloc(sizeof(*vm), GFP_KERNEL);
377 __mutex_init(&vm->mutex, "&vm->mutex", key ? key : &_key);
378 INIT_LIST_HEAD(&vm->pgd_list);
380 kref_init(&vm->refcount);
381 vm->fpde = offset >> (mmu->func->pgt_bits + 12);
382 vm->lpde = (offset + length - 1) >> (mmu->func->pgt_bits + 12);
384 vm->pgt = vzalloc((vm->lpde - vm->fpde + 1) * sizeof(*vm->pgt));
390 ret = nvkm_mm_init(&vm->mm, mm_offset >> 12, mm_length >> 12,
404 nvkm_vm_new(struct nvkm_device *device, u64 offset, u64 length, u64 mm_offset,
405 struct lock_class_key *key, struct nvkm_vm **pvm)
407 struct nvkm_mmu *mmu = device->mmu;
408 if (!mmu->func->create)
410 return mmu->func->create(mmu, offset, length, mm_offset, key, pvm);
414 nvkm_vm_link(struct nvkm_vm *vm, struct nvkm_gpuobj *pgd)
416 struct nvkm_mmu *mmu = vm->mmu;
417 struct nvkm_vm_pgd *vpgd;
423 vpgd = kzalloc(sizeof(*vpgd), GFP_KERNEL);
429 mutex_lock(&vm->mutex);
430 for (i = vm->fpde; i <= vm->lpde; i++)
431 mmu->func->map_pgt(pgd, i, vm->pgt[i - vm->fpde].mem);
432 list_add(&vpgd->head, &vm->pgd_list);
433 mutex_unlock(&vm->mutex);
438 nvkm_vm_unlink(struct nvkm_vm *vm, struct nvkm_gpuobj *mpgd)
440 struct nvkm_vm_pgd *vpgd, *tmp;
445 mutex_lock(&vm->mutex);
446 list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) {
447 if (vpgd->obj == mpgd) {
448 list_del(&vpgd->head);
453 mutex_unlock(&vm->mutex);
457 nvkm_vm_del(struct kref *kref)
459 struct nvkm_vm *vm = container_of(kref, typeof(*vm), refcount);
460 struct nvkm_vm_pgd *vpgd, *tmp;
462 list_for_each_entry_safe(vpgd, tmp, &vm->pgd_list, head) {
463 nvkm_vm_unlink(vm, vpgd->obj);
466 nvkm_mm_fini(&vm->mm);
472 nvkm_vm_ref(struct nvkm_vm *ref, struct nvkm_vm **ptr, struct nvkm_gpuobj *pgd)
475 int ret = nvkm_vm_link(ref, pgd);
479 kref_get(&ref->refcount);
483 nvkm_vm_unlink(*ptr, pgd);
484 kref_put(&(*ptr)->refcount, nvkm_vm_del);
492 nvkm_mmu_oneinit(struct nvkm_subdev *subdev)
494 struct nvkm_mmu *mmu = nvkm_mmu(subdev);
495 if (mmu->func->oneinit)
496 return mmu->func->oneinit(mmu);
501 nvkm_mmu_init(struct nvkm_subdev *subdev)
503 struct nvkm_mmu *mmu = nvkm_mmu(subdev);
505 mmu->func->init(mmu);
510 nvkm_mmu_dtor(struct nvkm_subdev *subdev)
512 struct nvkm_mmu *mmu = nvkm_mmu(subdev);
514 return mmu->func->dtor(mmu);
518 static const struct nvkm_subdev_func
520 .dtor = nvkm_mmu_dtor,
521 .oneinit = nvkm_mmu_oneinit,
522 .init = nvkm_mmu_init,
526 nvkm_mmu_ctor(const struct nvkm_mmu_func *func, struct nvkm_device *device,
527 int index, struct nvkm_mmu *mmu)
529 nvkm_subdev_ctor(&nvkm_mmu, device, index, &mmu->subdev);
531 mmu->limit = func->limit;
532 mmu->dma_bits = func->dma_bits;
533 mmu->lpg_shift = func->lpg_shift;
537 nvkm_mmu_new_(const struct nvkm_mmu_func *func, struct nvkm_device *device,
538 int index, struct nvkm_mmu **pmmu)
540 if (!(*pmmu = kzalloc(sizeof(**pmmu), GFP_KERNEL)))
542 nvkm_mmu_ctor(func, device, index, *pmmu);