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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2020-2023 Intel Corporation
4 */
5
6#include <linux/dma-buf.h>
7#include <linux/highmem.h>
8#include <linux/module.h>
9#include <linux/set_memory.h>
10#include <linux/xarray.h>
11
12#include <drm/drm_cache.h>
13#include <drm/drm_debugfs.h>
14#include <drm/drm_file.h>
15#include <drm/drm_utils.h>
16
17#include "ivpu_drv.h"
18#include "ivpu_gem.h"
19#include "ivpu_hw.h"
20#include "ivpu_mmu.h"
21#include "ivpu_mmu_context.h"
22
23static const struct drm_gem_object_funcs ivpu_gem_funcs;
24
25static inline void ivpu_dbg_bo(struct ivpu_device *vdev, struct ivpu_bo *bo, const char *action)
26{
27 ivpu_dbg(vdev, BO,
28 "%6s: bo %8p vpu_addr %9llx size %8zu ctx %d has_pages %d dma_mapped %d mmu_mapped %d wc %d imported %d\n",
29 action, bo, bo->vpu_addr, ivpu_bo_size(bo), bo->ctx ? bo->ctx->id : 0,
30 (bool)bo->base.pages, (bool)bo->base.sgt, bo->mmu_mapped, bo->base.map_wc,
31 (bool)bo->base.base.import_attach);
32}
33
34/*
35 * ivpu_bo_pin() - pin the backing physical pages and map them to VPU.
36 *
37 * This function pins physical memory pages, then maps the physical pages
38 * to IOMMU address space and finally updates the VPU MMU page tables
39 * to allow the VPU to translate VPU address to IOMMU address.
40 */
41int __must_check ivpu_bo_pin(struct ivpu_bo *bo)
42{
43 struct ivpu_device *vdev = ivpu_bo_to_vdev(bo);
44 int ret = 0;
45
46 mutex_lock(&bo->lock);
47
48 ivpu_dbg_bo(vdev, bo, "pin");
49 drm_WARN_ON(&vdev->drm, !bo->ctx);
50
51 if (!bo->mmu_mapped) {
52 struct sg_table *sgt = drm_gem_shmem_get_pages_sgt(&bo->base);
53
54 if (IS_ERR(sgt)) {
55 ret = PTR_ERR(sgt);
56 ivpu_err(vdev, "Failed to map BO in IOMMU: %d\n", ret);
57 goto unlock;
58 }
59
60 ret = ivpu_mmu_context_map_sgt(vdev, bo->ctx, bo->vpu_addr, sgt,
61 ivpu_bo_is_snooped(bo));
62 if (ret) {
63 ivpu_err(vdev, "Failed to map BO in MMU: %d\n", ret);
64 goto unlock;
65 }
66 bo->mmu_mapped = true;
67 }
68
69unlock:
70 mutex_unlock(&bo->lock);
71
72 return ret;
73}
74
75static int
76ivpu_bo_alloc_vpu_addr(struct ivpu_bo *bo, struct ivpu_mmu_context *ctx,
77 const struct ivpu_addr_range *range)
78{
79 struct ivpu_device *vdev = ivpu_bo_to_vdev(bo);
80 int idx, ret;
81
82 if (!drm_dev_enter(&vdev->drm, &idx))
83 return -ENODEV;
84
85 mutex_lock(&bo->lock);
86
87 ret = ivpu_mmu_context_insert_node(ctx, range, ivpu_bo_size(bo), &bo->mm_node);
88 if (!ret) {
89 bo->ctx = ctx;
90 bo->vpu_addr = bo->mm_node.start;
91 } else {
92 ivpu_err(vdev, "Failed to add BO to context %u: %d\n", ctx->id, ret);
93 }
94
95 ivpu_dbg_bo(vdev, bo, "alloc");
96
97 mutex_unlock(&bo->lock);
98
99 drm_dev_exit(idx);
100
101 return ret;
102}
103
104static void ivpu_bo_unbind_locked(struct ivpu_bo *bo)
105{
106 struct ivpu_device *vdev = ivpu_bo_to_vdev(bo);
107
108 lockdep_assert(lockdep_is_held(&bo->lock) || !kref_read(&bo->base.base.refcount));
109
110 if (bo->mmu_mapped) {
111 drm_WARN_ON(&vdev->drm, !bo->ctx);
112 drm_WARN_ON(&vdev->drm, !bo->vpu_addr);
113 drm_WARN_ON(&vdev->drm, !bo->base.sgt);
114 ivpu_mmu_context_unmap_sgt(vdev, bo->ctx, bo->vpu_addr, bo->base.sgt);
115 bo->mmu_mapped = false;
116 }
117
118 if (bo->ctx) {
119 ivpu_mmu_context_remove_node(bo->ctx, &bo->mm_node);
120 bo->ctx = NULL;
121 }
122
123 if (bo->base.base.import_attach)
124 return;
125
126 dma_resv_lock(bo->base.base.resv, NULL);
127 if (bo->base.sgt) {
128 dma_unmap_sgtable(vdev->drm.dev, bo->base.sgt, DMA_BIDIRECTIONAL, 0);
129 sg_free_table(bo->base.sgt);
130 kfree(bo->base.sgt);
131 bo->base.sgt = NULL;
132 }
133 dma_resv_unlock(bo->base.base.resv);
134}
135
136void ivpu_bo_unbind_all_bos_from_context(struct ivpu_device *vdev, struct ivpu_mmu_context *ctx)
137{
138 struct ivpu_bo *bo;
139
140 if (drm_WARN_ON(&vdev->drm, !ctx))
141 return;
142
143 mutex_lock(&vdev->bo_list_lock);
144 list_for_each_entry(bo, &vdev->bo_list, bo_list_node) {
145 mutex_lock(&bo->lock);
146 if (bo->ctx == ctx) {
147 ivpu_dbg_bo(vdev, bo, "unbind");
148 ivpu_bo_unbind_locked(bo);
149 }
150 mutex_unlock(&bo->lock);
151 }
152 mutex_unlock(&vdev->bo_list_lock);
153}
154
155struct drm_gem_object *ivpu_gem_create_object(struct drm_device *dev, size_t size)
156{
157 struct ivpu_bo *bo;
158
159 if (size == 0 || !PAGE_ALIGNED(size))
160 return ERR_PTR(-EINVAL);
161
162 bo = kzalloc(sizeof(*bo), GFP_KERNEL);
163 if (!bo)
164 return ERR_PTR(-ENOMEM);
165
166 bo->base.base.funcs = &ivpu_gem_funcs;
167 bo->base.pages_mark_dirty_on_put = true; /* VPU can dirty a BO anytime */
168
169 INIT_LIST_HEAD(&bo->bo_list_node);
170 mutex_init(&bo->lock);
171
172 return &bo->base.base;
173}
174
175static struct ivpu_bo *
176ivpu_bo_create(struct ivpu_device *vdev, u64 size, u32 flags)
177{
178 struct drm_gem_shmem_object *shmem;
179 struct ivpu_bo *bo;
180
181 switch (flags & DRM_IVPU_BO_CACHE_MASK) {
182 case DRM_IVPU_BO_CACHED:
183 case DRM_IVPU_BO_WC:
184 break;
185 default:
186 return ERR_PTR(-EINVAL);
187 }
188
189 shmem = drm_gem_shmem_create(&vdev->drm, size);
190 if (IS_ERR(shmem))
191 return ERR_CAST(shmem);
192
193 bo = to_ivpu_bo(&shmem->base);
194 bo->base.map_wc = flags & DRM_IVPU_BO_WC;
195 bo->flags = flags;
196
197 mutex_lock(&vdev->bo_list_lock);
198 list_add_tail(&bo->bo_list_node, &vdev->bo_list);
199 mutex_unlock(&vdev->bo_list_lock);
200
201 return bo;
202}
203
204static int ivpu_bo_open(struct drm_gem_object *obj, struct drm_file *file)
205{
206 struct ivpu_file_priv *file_priv = file->driver_priv;
207 struct ivpu_device *vdev = file_priv->vdev;
208 struct ivpu_bo *bo = to_ivpu_bo(obj);
209 struct ivpu_addr_range *range;
210
211 if (bo->ctx) {
212 ivpu_warn(vdev, "Can't add BO to ctx %u: already in ctx %u\n",
213 file_priv->ctx.id, bo->ctx->id);
214 return -EALREADY;
215 }
216
217 if (bo->flags & DRM_IVPU_BO_SHAVE_MEM)
218 range = &vdev->hw->ranges.shave;
219 else if (bo->flags & DRM_IVPU_BO_DMA_MEM)
220 range = &vdev->hw->ranges.dma;
221 else
222 range = &vdev->hw->ranges.user;
223
224 return ivpu_bo_alloc_vpu_addr(bo, &file_priv->ctx, range);
225}
226
227static void ivpu_bo_free(struct drm_gem_object *obj)
228{
229 struct ivpu_device *vdev = to_ivpu_device(obj->dev);
230 struct ivpu_bo *bo = to_ivpu_bo(obj);
231
232 ivpu_dbg_bo(vdev, bo, "free");
233
234 mutex_lock(&vdev->bo_list_lock);
235 list_del(&bo->bo_list_node);
236 mutex_unlock(&vdev->bo_list_lock);
237
238 drm_WARN_ON(&vdev->drm, !dma_resv_test_signaled(obj->resv, DMA_RESV_USAGE_READ));
239
240 ivpu_bo_unbind_locked(bo);
241 mutex_destroy(&bo->lock);
242
243 drm_WARN_ON(obj->dev, bo->base.pages_use_count > 1);
244 drm_gem_shmem_free(&bo->base);
245}
246
247static const struct drm_gem_object_funcs ivpu_gem_funcs = {
248 .free = ivpu_bo_free,
249 .open = ivpu_bo_open,
250 .print_info = drm_gem_shmem_object_print_info,
251 .pin = drm_gem_shmem_object_pin,
252 .unpin = drm_gem_shmem_object_unpin,
253 .get_sg_table = drm_gem_shmem_object_get_sg_table,
254 .vmap = drm_gem_shmem_object_vmap,
255 .vunmap = drm_gem_shmem_object_vunmap,
256 .mmap = drm_gem_shmem_object_mmap,
257 .vm_ops = &drm_gem_shmem_vm_ops,
258};
259
260int ivpu_bo_create_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
261{
262 struct ivpu_file_priv *file_priv = file->driver_priv;
263 struct ivpu_device *vdev = file_priv->vdev;
264 struct drm_ivpu_bo_create *args = data;
265 u64 size = PAGE_ALIGN(args->size);
266 struct ivpu_bo *bo;
267 int ret;
268
269 if (args->flags & ~DRM_IVPU_BO_FLAGS)
270 return -EINVAL;
271
272 if (size == 0)
273 return -EINVAL;
274
275 bo = ivpu_bo_create(vdev, size, args->flags);
276 if (IS_ERR(bo)) {
277 ivpu_err(vdev, "Failed to create BO: %pe (ctx %u size %llu flags 0x%x)",
278 bo, file_priv->ctx.id, args->size, args->flags);
279 return PTR_ERR(bo);
280 }
281
282 ret = drm_gem_handle_create(file, &bo->base.base, &args->handle);
283 if (!ret)
284 args->vpu_addr = bo->vpu_addr;
285
286 drm_gem_object_put(&bo->base.base);
287
288 return ret;
289}
290
291struct ivpu_bo *
292ivpu_bo_alloc_internal(struct ivpu_device *vdev, u64 vpu_addr, u64 size, u32 flags)
293{
294 const struct ivpu_addr_range *range;
295 struct ivpu_addr_range fixed_range;
296 struct iosys_map map;
297 struct ivpu_bo *bo;
298 int ret;
299
300 drm_WARN_ON(&vdev->drm, !PAGE_ALIGNED(vpu_addr));
301 drm_WARN_ON(&vdev->drm, !PAGE_ALIGNED(size));
302
303 if (vpu_addr) {
304 fixed_range.start = vpu_addr;
305 fixed_range.end = vpu_addr + size;
306 range = &fixed_range;
307 } else {
308 range = &vdev->hw->ranges.global;
309 }
310
311 bo = ivpu_bo_create(vdev, size, flags);
312 if (IS_ERR(bo)) {
313 ivpu_err(vdev, "Failed to create BO: %pe (vpu_addr 0x%llx size %llu flags 0x%x)",
314 bo, vpu_addr, size, flags);
315 return NULL;
316 }
317
318 ret = ivpu_bo_alloc_vpu_addr(bo, &vdev->gctx, range);
319 if (ret)
320 goto err_put;
321
322 ret = ivpu_bo_pin(bo);
323 if (ret)
324 goto err_put;
325
326 dma_resv_lock(bo->base.base.resv, NULL);
327 ret = drm_gem_shmem_vmap(&bo->base, &map);
328 dma_resv_unlock(bo->base.base.resv);
329 if (ret)
330 goto err_put;
331
332 return bo;
333
334err_put:
335 drm_gem_object_put(&bo->base.base);
336 return NULL;
337}
338
339void ivpu_bo_free_internal(struct ivpu_bo *bo)
340{
341 struct iosys_map map = IOSYS_MAP_INIT_VADDR(bo->base.vaddr);
342
343 dma_resv_lock(bo->base.base.resv, NULL);
344 drm_gem_shmem_vunmap(&bo->base, &map);
345 dma_resv_unlock(bo->base.base.resv);
346
347 drm_gem_object_put(&bo->base.base);
348}
349
350int ivpu_bo_info_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
351{
352 struct drm_ivpu_bo_info *args = data;
353 struct drm_gem_object *obj;
354 struct ivpu_bo *bo;
355 int ret = 0;
356
357 obj = drm_gem_object_lookup(file, args->handle);
358 if (!obj)
359 return -ENOENT;
360
361 bo = to_ivpu_bo(obj);
362
363 mutex_lock(&bo->lock);
364 args->flags = bo->flags;
365 args->mmap_offset = drm_vma_node_offset_addr(&obj->vma_node);
366 args->vpu_addr = bo->vpu_addr;
367 args->size = obj->size;
368 mutex_unlock(&bo->lock);
369
370 drm_gem_object_put(obj);
371 return ret;
372}
373
374int ivpu_bo_wait_ioctl(struct drm_device *dev, void *data, struct drm_file *file)
375{
376 struct drm_ivpu_bo_wait *args = data;
377 struct drm_gem_object *obj;
378 unsigned long timeout;
379 long ret;
380
381 timeout = drm_timeout_abs_to_jiffies(args->timeout_ns);
382
383 obj = drm_gem_object_lookup(file, args->handle);
384 if (!obj)
385 return -EINVAL;
386
387 ret = dma_resv_wait_timeout(obj->resv, DMA_RESV_USAGE_READ, true, timeout);
388 if (ret == 0) {
389 ret = -ETIMEDOUT;
390 } else if (ret > 0) {
391 ret = 0;
392 args->job_status = to_ivpu_bo(obj)->job_status;
393 }
394
395 drm_gem_object_put(obj);
396
397 return ret;
398}
399
400static void ivpu_bo_print_info(struct ivpu_bo *bo, struct drm_printer *p)
401{
402 mutex_lock(&bo->lock);
403
404 drm_printf(p, "%-9p %-3u 0x%-12llx %-10lu 0x%-8x %-4u",
405 bo, bo->ctx->id, bo->vpu_addr, bo->base.base.size,
406 bo->flags, kref_read(&bo->base.base.refcount));
407
408 if (bo->base.pages)
409 drm_printf(p, " has_pages");
410
411 if (bo->mmu_mapped)
412 drm_printf(p, " mmu_mapped");
413
414 if (bo->base.base.import_attach)
415 drm_printf(p, " imported");
416
417 drm_printf(p, "\n");
418
419 mutex_unlock(&bo->lock);
420}
421
422void ivpu_bo_list(struct drm_device *dev, struct drm_printer *p)
423{
424 struct ivpu_device *vdev = to_ivpu_device(dev);
425 struct ivpu_bo *bo;
426
427 drm_printf(p, "%-9s %-3s %-14s %-10s %-10s %-4s %s\n",
428 "bo", "ctx", "vpu_addr", "size", "flags", "refs", "attribs");
429
430 mutex_lock(&vdev->bo_list_lock);
431 list_for_each_entry(bo, &vdev->bo_list, bo_list_node)
432 ivpu_bo_print_info(bo, p);
433 mutex_unlock(&vdev->bo_list_lock);
434}
435
436void ivpu_bo_list_print(struct drm_device *dev)
437{
438 struct drm_printer p = drm_info_printer(dev->dev);
439
440 ivpu_bo_list(dev, &p);
441}