417 lines · c
1// SPDX-License-Identifier: GPL-2.0 OR MIT2/* Copyright 2017-2019 Qiang Yu <yuq825@gmail.com> */3 4#include <linux/mm.h>5#include <linux/iosys-map.h>6#include <linux/sync_file.h>7#include <linux/pagemap.h>8#include <linux/shmem_fs.h>9#include <linux/dma-mapping.h>10 11#include <drm/drm_file.h>12#include <drm/drm_syncobj.h>13#include <drm/drm_utils.h>14 15#include <drm/lima_drm.h>16 17#include "lima_drv.h"18#include "lima_gem.h"19#include "lima_vm.h"20 21int lima_heap_alloc(struct lima_bo *bo, struct lima_vm *vm)22{23 struct page **pages;24 struct address_space *mapping = bo->base.base.filp->f_mapping;25 struct device *dev = bo->base.base.dev->dev;26 size_t old_size = bo->heap_size;27 size_t new_size = bo->heap_size ? bo->heap_size * 2 :28 (lima_heap_init_nr_pages << PAGE_SHIFT);29 struct sg_table sgt;30 int i, ret;31 32 if (bo->heap_size >= bo->base.base.size)33 return -ENOSPC;34 35 new_size = min(new_size, bo->base.base.size);36 37 dma_resv_lock(bo->base.base.resv, NULL);38 39 if (bo->base.pages) {40 pages = bo->base.pages;41 } else {42 pages = kvmalloc_array(bo->base.base.size >> PAGE_SHIFT,43 sizeof(*pages), GFP_KERNEL | __GFP_ZERO);44 if (!pages) {45 dma_resv_unlock(bo->base.base.resv);46 return -ENOMEM;47 }48 49 bo->base.pages = pages;50 bo->base.pages_use_count = 1;51 52 mapping_set_unevictable(mapping);53 }54 55 for (i = old_size >> PAGE_SHIFT; i < new_size >> PAGE_SHIFT; i++) {56 struct page *page = shmem_read_mapping_page(mapping, i);57 58 if (IS_ERR(page)) {59 dma_resv_unlock(bo->base.base.resv);60 return PTR_ERR(page);61 }62 pages[i] = page;63 }64 65 dma_resv_unlock(bo->base.base.resv);66 67 ret = sg_alloc_table_from_pages(&sgt, pages, i, 0,68 new_size, GFP_KERNEL);69 if (ret)70 return ret;71 72 if (bo->base.sgt) {73 dma_unmap_sgtable(dev, bo->base.sgt, DMA_BIDIRECTIONAL, 0);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 ret = -ENOMEM;79 goto err_out0;80 }81 }82 83 ret = dma_map_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);84 if (ret)85 goto err_out1;86 87 *bo->base.sgt = sgt;88 89 if (vm) {90 ret = lima_vm_map_bo(vm, bo, old_size >> PAGE_SHIFT);91 if (ret)92 goto err_out2;93 }94 95 bo->heap_size = new_size;96 return 0;97 98err_out2:99 dma_unmap_sgtable(dev, &sgt, DMA_BIDIRECTIONAL, 0);100err_out1:101 kfree(bo->base.sgt);102 bo->base.sgt = NULL;103err_out0:104 sg_free_table(&sgt);105 return ret;106}107 108int lima_gem_create_handle(struct drm_device *dev, struct drm_file *file,109 u32 size, u32 flags, u32 *handle)110{111 int err;112 gfp_t mask;113 struct drm_gem_shmem_object *shmem;114 struct drm_gem_object *obj;115 struct lima_bo *bo;116 bool is_heap = flags & LIMA_BO_FLAG_HEAP;117 118 shmem = drm_gem_shmem_create(dev, size);119 if (IS_ERR(shmem))120 return PTR_ERR(shmem);121 122 obj = &shmem->base;123 124 /* Mali Utgard GPU can only support 32bit address space */125 mask = mapping_gfp_mask(obj->filp->f_mapping);126 mask &= ~__GFP_HIGHMEM;127 mask |= __GFP_DMA32;128 mapping_set_gfp_mask(obj->filp->f_mapping, mask);129 130 if (is_heap) {131 bo = to_lima_bo(obj);132 err = lima_heap_alloc(bo, NULL);133 if (err)134 goto out;135 } else {136 struct sg_table *sgt = drm_gem_shmem_get_pages_sgt(shmem);137 138 if (IS_ERR(sgt)) {139 err = PTR_ERR(sgt);140 goto out;141 }142 }143 144 err = drm_gem_handle_create(file, obj, handle);145 146out:147 /* drop reference from allocate - handle holds it now */148 drm_gem_object_put(obj);149 150 return err;151}152 153static void lima_gem_free_object(struct drm_gem_object *obj)154{155 struct lima_bo *bo = to_lima_bo(obj);156 157 if (!list_empty(&bo->va))158 dev_err(obj->dev->dev, "lima gem free bo still has va\n");159 160 drm_gem_shmem_free(&bo->base);161}162 163static int lima_gem_object_open(struct drm_gem_object *obj, struct drm_file *file)164{165 struct lima_bo *bo = to_lima_bo(obj);166 struct lima_drm_priv *priv = to_lima_drm_priv(file);167 struct lima_vm *vm = priv->vm;168 169 return lima_vm_bo_add(vm, bo, true);170}171 172static void lima_gem_object_close(struct drm_gem_object *obj, struct drm_file *file)173{174 struct lima_bo *bo = to_lima_bo(obj);175 struct lima_drm_priv *priv = to_lima_drm_priv(file);176 struct lima_vm *vm = priv->vm;177 178 lima_vm_bo_del(vm, bo);179}180 181static int lima_gem_pin(struct drm_gem_object *obj)182{183 struct lima_bo *bo = to_lima_bo(obj);184 185 if (bo->heap_size)186 return -EINVAL;187 188 return drm_gem_shmem_pin_locked(&bo->base);189}190 191static int lima_gem_vmap(struct drm_gem_object *obj, struct iosys_map *map)192{193 struct lima_bo *bo = to_lima_bo(obj);194 195 if (bo->heap_size)196 return -EINVAL;197 198 return drm_gem_shmem_vmap(&bo->base, map);199}200 201static int lima_gem_mmap(struct drm_gem_object *obj, struct vm_area_struct *vma)202{203 struct lima_bo *bo = to_lima_bo(obj);204 205 if (bo->heap_size)206 return -EINVAL;207 208 return drm_gem_shmem_mmap(&bo->base, vma);209}210 211static const struct drm_gem_object_funcs lima_gem_funcs = {212 .free = lima_gem_free_object,213 .open = lima_gem_object_open,214 .close = lima_gem_object_close,215 .print_info = drm_gem_shmem_object_print_info,216 .pin = lima_gem_pin,217 .unpin = drm_gem_shmem_object_unpin,218 .get_sg_table = drm_gem_shmem_object_get_sg_table,219 .vmap = lima_gem_vmap,220 .vunmap = drm_gem_shmem_object_vunmap,221 .mmap = lima_gem_mmap,222 .vm_ops = &drm_gem_shmem_vm_ops,223};224 225struct drm_gem_object *lima_gem_create_object(struct drm_device *dev, size_t size)226{227 struct lima_bo *bo;228 229 bo = kzalloc(sizeof(*bo), GFP_KERNEL);230 if (!bo)231 return ERR_PTR(-ENOMEM);232 233 mutex_init(&bo->lock);234 INIT_LIST_HEAD(&bo->va);235 bo->base.map_wc = true;236 bo->base.base.funcs = &lima_gem_funcs;237 238 return &bo->base.base;239}240 241int lima_gem_get_info(struct drm_file *file, u32 handle, u32 *va, u64 *offset)242{243 struct drm_gem_object *obj;244 struct lima_bo *bo;245 struct lima_drm_priv *priv = to_lima_drm_priv(file);246 struct lima_vm *vm = priv->vm;247 248 obj = drm_gem_object_lookup(file, handle);249 if (!obj)250 return -ENOENT;251 252 bo = to_lima_bo(obj);253 254 *va = lima_vm_get_va(vm, bo);255 256 *offset = drm_vma_node_offset_addr(&obj->vma_node);257 258 drm_gem_object_put(obj);259 return 0;260}261 262static int lima_gem_sync_bo(struct lima_sched_task *task, struct lima_bo *bo,263 bool write, bool explicit)264{265 int err;266 267 err = dma_resv_reserve_fences(lima_bo_resv(bo), 1);268 if (err)269 return err;270 271 /* explicit sync use user passed dep fence */272 if (explicit)273 return 0;274 275 return drm_sched_job_add_implicit_dependencies(&task->base,276 &bo->base.base,277 write);278}279 280static int lima_gem_add_deps(struct drm_file *file, struct lima_submit *submit)281{282 int i, err;283 284 for (i = 0; i < ARRAY_SIZE(submit->in_sync); i++) {285 if (!submit->in_sync[i])286 continue;287 288 err = drm_sched_job_add_syncobj_dependency(&submit->task->base, file,289 submit->in_sync[i], 0);290 if (err)291 return err;292 }293 294 return 0;295}296 297int lima_gem_submit(struct drm_file *file, struct lima_submit *submit)298{299 int i, err = 0;300 struct ww_acquire_ctx ctx;301 struct lima_drm_priv *priv = to_lima_drm_priv(file);302 struct lima_vm *vm = priv->vm;303 struct drm_syncobj *out_sync = NULL;304 struct dma_fence *fence;305 struct lima_bo **bos = submit->lbos;306 307 if (submit->out_sync) {308 out_sync = drm_syncobj_find(file, submit->out_sync);309 if (!out_sync)310 return -ENOENT;311 }312 313 for (i = 0; i < submit->nr_bos; i++) {314 struct drm_gem_object *obj;315 struct lima_bo *bo;316 317 obj = drm_gem_object_lookup(file, submit->bos[i].handle);318 if (!obj) {319 err = -ENOENT;320 goto err_out0;321 }322 323 bo = to_lima_bo(obj);324 325 /* increase refcnt of gpu va map to prevent unmapped when executing,326 * will be decreased when task done327 */328 err = lima_vm_bo_add(vm, bo, false);329 if (err) {330 drm_gem_object_put(obj);331 goto err_out0;332 }333 334 bos[i] = bo;335 }336 337 err = drm_gem_lock_reservations((struct drm_gem_object **)bos,338 submit->nr_bos, &ctx);339 if (err)340 goto err_out0;341 342 err = lima_sched_task_init(343 submit->task, submit->ctx->context + submit->pipe,344 bos, submit->nr_bos, vm);345 if (err)346 goto err_out1;347 348 err = lima_gem_add_deps(file, submit);349 if (err)350 goto err_out2;351 352 for (i = 0; i < submit->nr_bos; i++) {353 err = lima_gem_sync_bo(354 submit->task, bos[i],355 submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE,356 submit->flags & LIMA_SUBMIT_FLAG_EXPLICIT_FENCE);357 if (err)358 goto err_out2;359 }360 361 fence = lima_sched_context_queue_task(submit->task);362 363 for (i = 0; i < submit->nr_bos; i++) {364 dma_resv_add_fence(lima_bo_resv(bos[i]), fence,365 submit->bos[i].flags & LIMA_SUBMIT_BO_WRITE ?366 DMA_RESV_USAGE_WRITE : DMA_RESV_USAGE_READ);367 }368 369 drm_gem_unlock_reservations((struct drm_gem_object **)bos,370 submit->nr_bos, &ctx);371 372 for (i = 0; i < submit->nr_bos; i++)373 drm_gem_object_put(&bos[i]->base.base);374 375 if (out_sync) {376 drm_syncobj_replace_fence(out_sync, fence);377 drm_syncobj_put(out_sync);378 }379 380 dma_fence_put(fence);381 382 return 0;383 384err_out2:385 lima_sched_task_fini(submit->task);386err_out1:387 drm_gem_unlock_reservations((struct drm_gem_object **)bos,388 submit->nr_bos, &ctx);389err_out0:390 for (i = 0; i < submit->nr_bos; i++) {391 if (!bos[i])392 break;393 lima_vm_bo_del(vm, bos[i]);394 drm_gem_object_put(&bos[i]->base.base);395 }396 if (out_sync)397 drm_syncobj_put(out_sync);398 return err;399}400 401int lima_gem_wait(struct drm_file *file, u32 handle, u32 op, s64 timeout_ns)402{403 bool write = op & LIMA_GEM_WAIT_WRITE;404 long ret, timeout;405 406 if (!op)407 return 0;408 409 timeout = drm_timeout_abs_to_jiffies(timeout_ns);410 411 ret = drm_gem_dma_resv_wait(file, handle, write, timeout);412 if (ret == -ETIME)413 ret = timeout ? -ETIMEDOUT : -EBUSY;414 415 return ret;416}417