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1// SPDX-License-Identifier: GPL-2.0 OR MIT
2/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */
3
4#include <linux/mm.h>
5#include <linux/sync_file.h>
6#include <linux/pagemap.h>
7#include <linux/shmem_fs.h>
8#include <linux/dma-mapping.h>
9
10#include <drm/drm_file.h>
11#include <drm/drm_syncobj.h>
12#include <drm/drm_utils.h>
13
14#include <drm/lima_drm.h>
15
16#include "lima_drv.h"
17#include "lima_gem.h"
18#include "lima_vm.h"
19
20int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)
21{
22 struct page **pages;
23 struct address_space *mapping = bo->base.base.filp->f_mapping;
24 struct device *dev = bo->base.base.dev->dev;
25 size_t old_size = bo->heap_size;
26 size_t new_size = bo->heap_size ? bo->heap_size * 2 :
27 (lima_heap_init_nr_pages << PAGE_SHIFT);
28 struct sg_table sgt;
29 int i, ret;
30
31 if (bo->heap_size >= bo->base.base.size)
32 return -ENOSPC;
33
34 new_size = min(new_size, bo->base.base.size);
35
36 mutex_lock(&bo->base.pages_lock);
37
38 if (bo->base.pages) {
39 pages = bo->base.pages;
40 } else {
41 pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT,
42 sizeof(*pages), GFP_KERNEL | __GFP_ZERO);
43 if (!pages) {
44 mutex_unlock(&bo->base.pages_lock);
45 return -ENOMEM;
46 }
47
48 bo->base.pages = pages;
49 bo->base.pages_use_count = 1;
50
51 mapping_set_unevictable(mapping);
52 }
53
54 for (i = old_size >> PAGE_SHIFT; i < new_size >> PAGE_SHIFT; i++) {
55 struct page *page = shmem_read_mapping_page(mapping, i);
56
57 if (IS_ERR(page)) {
58 mutex_unlock(&bo->base.pages_lock);
59 return PTR_ERR(page);
60 }
61 pages[i] = page;
62 }
63
64 mutex_unlock(&bo->base.pages_lock);
65
66 ret = sg_alloc_table_from_pages(&sgt, pages, i, 0,
67 new_size, GFP_KERNEL);
68 if (ret)
69 return ret;
70
71 if (bo->base.sgt) {
72 dma_unmap_sg(dev, bo->base.sgt->sgl,
73 bo->base.sgt->nents, DMA_BIDIRECTIONAL);
74 sg_free_table(bo->base.sgt);
75 } else {
76 bo->base.sgt = kmalloc(sizeof(*bo->base.sgt), GFP_KERNEL);
77 if (!bo->base.sgt) {
78 sg_free_table(&sgt);
79 return -ENOMEM;
80 }
81 }
82
83 dma_map_sg(dev, sgt.sgl, sgt.nents, DMA_BIDIRECTIONAL);
84
85 *bo->base.sgt = sgt;
86
87 if (vm) {
88 ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT);
89 if (ret)
90 return ret;
91 }
92
93 bo->heap_size = new_size;
94 return 0;
95}
96
97int lima_gem_create_handle(struct drm_device *dev, struct drm_file *file,
98 u32 size, u32 flags, u32 *handle)
99{
100 int err;
101 gfp_t mask;
102 struct drm_gem_shmem_object *shmem;
103 struct drm_gem_object *obj;
104 struct lima_bo *bo;
105 bool is_heap = flags & LIMA_BO_FLAG_HEAP;
106
107 shmem = drm_gem_shmem_create(dev, size);
108 if (IS_ERR(shmem))
109 return PTR_ERR(shmem);
110
111 obj = &shmem->base;
112
113 /* Mali Utgard GPU can only support 32bit address space */
114 mask = mapping_gfp_mask(obj->filp->f_mapping);
115 mask &= ~__GFP_HIGHMEM;
116 mask |= __GFP_DMA32;
117 mapping_set_gfp_mask(obj->filp->f_mapping, mask);
118
119 if (is_heap) {
120 bo = to_lima_bo(obj);
121 err = lima_heap_alloc(bo, NULL);
122 if (err)
123 goto out;
124 } else {
125 struct sg_table *sgt = drm_gem_shmem_get_pages_sgt(obj);
126
127 if (IS_ERR(sgt)) {
128 err = PTR_ERR(sgt);
129 goto out;
130 }
131 }
132
133 err = drm_gem_handle_create(file, obj, handle);
134
135out:
136 /* drop reference from allocate - handle holds it now */
137 drm_gem_object_put(obj);
138
139 return err;
140}
141
142static void lima_gem_free_object(struct drm_gem_object *obj)
143{
144 struct lima_bo *bo = to_lima_bo(obj);
145
146 if (!list_empty(&bo->va))
147 dev_err(obj->dev->dev, "lima gem free bo still has va\n");
148
149 drm_gem_shmem_free_object(obj);
150}
151
152static int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file)
153{
154 struct lima_bo *bo = to_lima_bo(obj);
155 struct lima_drm_priv *priv = to_lima_drm_priv(file);
156 struct lima_vm *vm = priv->vm;
157
158 return lima_vm_bo_add(vm, bo, true);
159}
160
161static void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file)
162{
163 struct lima_bo *bo = to_lima_bo(obj);
164 struct lima_drm_priv *priv = to_lima_drm_priv(file);
165 struct lima_vm *vm = priv->vm;
166
167 lima_vm_bo_del(vm, bo);
168}
169
170static int lima_gem_pin(struct drm_gem_object *obj)
171{
172 struct lima_bo *bo = to_lima_bo(obj);
173
174 if (bo->heap_size)
175 return -EINVAL;
176
177 return drm_gem_shmem_pin(obj);
178}
179
180static void *lima_gem_vmap(struct drm_gem_object *obj)
181{
182 struct lima_bo *bo = to_lima_bo(obj);
183
184 if (bo->heap_size)
185 return ERR_PTR(-EINVAL);
186
187 return drm_gem_shmem_vmap(obj);
188}
189
190static int lima_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)
191{
192 struct lima_bo *bo = to_lima_bo(obj);
193
194 if (bo->heap_size)
195 return -EINVAL;
196
197 return drm_gem_shmem_mmap(obj, vma);
198}
199
200static const struct drm_gem_object_funcs lima_gem_funcs = {
201 .free = lima_gem_free_object,
202 .open = lima_gem_object_open,
203 .close = lima_gem_object_close,
204 .print_info = drm_gem_shmem_print_info,
205 .pin = lima_gem_pin,
206 .unpin = drm_gem_shmem_unpin,
207 .get_sg_table = drm_gem_shmem_get_sg_table,
208 .vmap = lima_gem_vmap,
209 .vunmap = drm_gem_shmem_vunmap,
210 .mmap = lima_gem_mmap,
211};
212
213struct drm_gem_object *lima_gem_create_object(struct drm_device *dev, size_t size)
214{
215 struct lima_bo *bo;
216
217 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
218 if (!bo)
219 return NULL;
220
221 mutex_init(&bo->lock);
222 INIT_LIST_HEAD(&bo->va);
223
224 bo->base.base.funcs = &lima_gem_funcs;
225
226 return &bo->base.base;
227}
228
229int lima_gem_get_info(struct drm_file *file, u32 handle, u32 *va, u64 *offset)
230{
231 struct drm_gem_object *obj;
232 struct lima_bo *bo;
233 struct lima_drm_priv *priv = to_lima_drm_priv(file);
234 struct lima_vm *vm = priv->vm;
235
236 obj = drm_gem_object_lookup(file, handle);
237 if (!obj)
238 return -ENOENT;
239
240 bo = to_lima_bo(obj);
241
242 *va = lima_vm_get_va(vm, bo);
243
244 *offset = drm_vma_node_offset_addr(&obj->vma_node);
245
246 drm_gem_object_put(obj);
247 return 0;
248}
249
250static int lima_gem_sync_bo(struct lima_sched_task *task, struct lima_bo *bo,
251 bool write, bool explicit)
252{
253 int err = 0;
254
255 if (!write) {
256 err = dma_resv_reserve_shared(lima_bo_resv(bo), 1);
257 if (err)
258 return err;
259 }
260
261 /* explicit sync use user passed dep fence */
262 if (explicit)
263 return 0;
264
265 return drm_gem_fence_array_add_implicit(&task->deps, &bo->base.base, write);
266}
267
268static int lima_gem_add_deps(struct drm_file *file, struct lima_submit *submit)
269{
270 int i, err;
271
272 for (i = 0; i < ARRAY_SIZE(submit->in_sync); i++) {
273 struct dma_fence *fence = NULL;
274
275 if (!submit->in_sync[i])
276 continue;
277
278 err = drm_syncobj_find_fence(file, submit->in_sync[i],
279 0, 0, &fence);
280 if (err)
281 return err;
282
283 err = drm_gem_fence_array_add(&submit->task->deps, fence);
284 if (err) {
285 dma_fence_put(fence);
286 return err;
287 }
288 }
289
290 return 0;
291}
292
293int lima_gem_submit(struct drm_file *file, struct lima_submit *submit)
294{
295 int i, err = 0;
296 struct ww_acquire_ctx ctx;
297 struct lima_drm_priv *priv = to_lima_drm_priv(file);
298 struct lima_vm *vm = priv->vm;
299 struct drm_syncobj *out_sync = NULL;
300 struct dma_fence *fence;
301 struct lima_bo **bos = submit->lbos;
302
303 if (submit->out_sync) {
304 out_sync = drm_syncobj_find(file, submit->out_sync);
305 if (!out_sync)
306 return -ENOENT;
307 }
308
309 for (i = 0; i < submit->nr_bos; i++) {
310 struct drm_gem_object *obj;
311 struct lima_bo *bo;
312
313 obj = drm_gem_object_lookup(file, submit->bos[i].handle);
314 if (!obj) {
315 err = -ENOENT;
316 goto err_out0;
317 }
318
319 bo = to_lima_bo(obj);
320
321 /* increase refcnt of gpu va map to prevent unmapped when executing,
322 * will be decreased when task done
323 */
324 err = lima_vm_bo_add(vm, bo, false);
325 if (err) {
326 drm_gem_object_put(obj);
327 goto err_out0;
328 }
329
330 bos[i] = bo;
331 }
332
333 err = drm_gem_lock_reservations((struct drm_gem_object **)bos,
334 submit->nr_bos, &ctx);
335 if (err)
336 goto err_out0;
337
338 err = lima_sched_task_init(
339 submit->task, submit->ctx->context + submit->pipe,
340 bos, submit->nr_bos, vm);
341 if (err)
342 goto err_out1;
343
344 err = lima_gem_add_deps(file, submit);
345 if (err)
346 goto err_out2;
347
348 for (i = 0; i < submit->nr_bos; i++) {
349 err = lima_gem_sync_bo(
350 submit->task, bos[i],
351 submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE,
352 submit->flags & LIMA_SUBMIT_FLAG_EXPLICIT_FENCE);
353 if (err)
354 goto err_out2;
355 }
356
357 fence = lima_sched_context_queue_task(
358 submit->ctx->context + submit->pipe, submit->task);
359
360 for (i = 0; i < submit->nr_bos; i++) {
361 if (submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE)
362 dma_resv_add_excl_fence(lima_bo_resv(bos[i]), fence);
363 else
364 dma_resv_add_shared_fence(lima_bo_resv(bos[i]), fence);
365 }
366
367 drm_gem_unlock_reservations((struct drm_gem_object **)bos,
368 submit->nr_bos, &ctx);
369
370 for (i = 0; i < submit->nr_bos; i++)
371 drm_gem_object_put(&bos[i]->base.base);
372
373 if (out_sync) {
374 drm_syncobj_replace_fence(out_sync, fence);
375 drm_syncobj_put(out_sync);
376 }
377
378 dma_fence_put(fence);
379
380 return 0;
381
382err_out2:
383 lima_sched_task_fini(submit->task);
384err_out1:
385 drm_gem_unlock_reservations((struct drm_gem_object **)bos,
386 submit->nr_bos, &ctx);
387err_out0:
388 for (i = 0; i < submit->nr_bos; i++) {
389 if (!bos[i])
390 break;
391 lima_vm_bo_del(vm, bos[i]);
392 drm_gem_object_put(&bos[i]->base.base);
393 }
394 if (out_sync)
395 drm_syncobj_put(out_sync);
396 return err;
397}
398
399int lima_gem_wait(struct drm_file *file, u32 handle, u32 op, s64 timeout_ns)
400{
401 bool write = op & LIMA_GEM_WAIT_WRITE;
402 long ret, timeout;
403
404 if (!op)
405 return 0;
406
407 timeout = drm_timeout_abs_to_jiffies(timeout_ns);
408
409 ret = drm_gem_dma_resv_wait(file, handle, write, timeout);
410 if (ret == -ETIME)
411 ret = timeout ? -ETIMEDOUT : -EBUSY;
412
413 return ret;
414}