92 lines
1.9 KiB
C
92 lines
1.9 KiB
C
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// SPDX-License-Identifier: MIT
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#include <linux/pagemap.h>
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#include <linux/slab.h>
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#include <drm/ttm/ttm_tt.h>
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#include "nouveau_drv.h"
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#include "nouveau_mem.h"
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#include "nouveau_ttm.h"
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#include "nouveau_bo.h"
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struct nouveau_sgdma_be {
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/* this has to be the first field so populate/unpopulated in
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* nouve_bo.c works properly, otherwise have to move them here
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*/
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struct ttm_tt ttm;
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struct nouveau_mem *mem;
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};
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void
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nouveau_sgdma_destroy(struct ttm_device *bdev, struct ttm_tt *ttm)
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{
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struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
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if (ttm) {
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ttm_tt_fini(&nvbe->ttm);
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kfree(nvbe);
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}
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}
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int
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nouveau_sgdma_bind(struct ttm_device *bdev, struct ttm_tt *ttm, struct ttm_resource *reg)
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{
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struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
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struct nouveau_drm *drm = nouveau_bdev(bdev);
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struct nouveau_mem *mem = nouveau_mem(reg);
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int ret;
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if (nvbe->mem)
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return 0;
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ret = nouveau_mem_host(reg, &nvbe->ttm);
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if (ret)
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return ret;
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if (drm->client.device.info.family < NV_DEVICE_INFO_V0_TESLA) {
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ret = nouveau_mem_map(mem, &mem->cli->vmm.vmm, &mem->vma[0]);
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if (ret) {
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nouveau_mem_fini(mem);
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return ret;
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}
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}
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nvbe->mem = mem;
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return 0;
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}
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void
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nouveau_sgdma_unbind(struct ttm_device *bdev, struct ttm_tt *ttm)
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{
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struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
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if (nvbe->mem) {
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nouveau_mem_fini(nvbe->mem);
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nvbe->mem = NULL;
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}
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}
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struct ttm_tt *
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nouveau_sgdma_create_ttm(struct ttm_buffer_object *bo, uint32_t page_flags)
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{
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struct nouveau_drm *drm = nouveau_bdev(bo->bdev);
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struct nouveau_bo *nvbo = nouveau_bo(bo);
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struct nouveau_sgdma_be *nvbe;
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enum ttm_caching caching;
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if (nvbo->force_coherent)
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caching = ttm_uncached;
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else if (drm->agp.bridge)
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caching = ttm_write_combined;
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else
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caching = ttm_cached;
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nvbe = kzalloc(sizeof(*nvbe), GFP_KERNEL);
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if (!nvbe)
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return NULL;
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if (ttm_sg_tt_init(&nvbe->ttm, bo, page_flags, caching)) {
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kfree(nvbe);
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return NULL;
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}
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return &nvbe->ttm;
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}
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