LXR linux/drivers/gpu/drm/nouveau/nouveau

   1// SPDX-License-Identifier: MIT
   2#include <linux/pagemap.h>
   3#include <linux/slab.h>
   4
   5#include "nouveau_drv.h"
   6#include "nouveau_mem.h"
   7#include "nouveau_ttm.h"
   8
   9struct nouveau_sgdma_be {
  10        /* this has to be the first field so populate/unpopulated in
  11         * nouve_bo.c works properly, otherwise have to move them here
  12         */
  13        struct ttm_dma_tt ttm;
  14        struct nouveau_mem *mem;
  15};
  16
  17void
  18nouveau_sgdma_destroy(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
  19{
  20        struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  21
  22        if (ttm) {
  23                nouveau_sgdma_unbind(bdev, ttm);
  24                ttm_tt_destroy_common(bdev, ttm);
  25                ttm_dma_tt_fini(&nvbe->ttm);
  26                kfree(nvbe);
  27        }
  28}
  29
  30int
  31nouveau_sgdma_bind(struct ttm_bo_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg)
  32{
  33        struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  34        struct nouveau_drm *drm = nouveau_bdev(bdev);
  35        struct nouveau_mem *mem = nouveau_mem(reg);
  36        int ret;
  37
  38        if (nvbe->mem)
  39                return 0;
  40
  41        ret = nouveau_mem_host(reg, &nvbe->ttm);
  42        if (ret)
  43                return ret;
  44
  45        if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
  46                ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
  47                if (ret) {
  48                        nouveau_mem_fini(mem);
  49                        return ret;
  50                }
  51        }
  52
  53        nvbe->mem = mem;
  54        return 0;
  55}
  56
  57void
  58nouveau_sgdma_unbind(struct ttm_bo_device *bdev, struct ttm_tt *ttm)
  59{
  60        struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
  61        if (nvbe->mem) {
  62                nouveau_mem_fini(nvbe->mem);
  63                nvbe->mem = NULL;
  64        }
  65}
  66
  67struct ttm_tt *
  68nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
  69{
  70        struct nouveau_sgdma_be *nvbe;
  71
  72        nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
  73        if (!nvbe)
  74                return NULL;
  75
  76        if (ttm_dma_tt_init(&nvbe->ttm, bo, page_flags)) {
  77                kfree(nvbe);
  78                return NULL;
  79        }
  80        return &nvbe->ttm.ttm;
  81}
  82