117 строки
2.6 KiB
C
117 строки
2.6 KiB
C
#include <linux/pagemap.h>
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#include <linux/slab.h>
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#include "nouveau_drm.h"
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#include "nouveau_ttm.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_dma_tt ttm;
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struct nvkm_mem *node;
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};
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static void
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nouveau_sgdma_destroy(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_dma_tt_fini(&nvbe->ttm);
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kfree(nvbe);
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}
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}
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static int
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nv04_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
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{
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struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
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struct nvkm_mem *node = mem->mm_node;
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if (ttm->sg) {
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node->sg = ttm->sg;
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node->pages = NULL;
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} else {
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node->sg = NULL;
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node->pages = nvbe->ttm.dma_address;
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}
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node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
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nvkm_vm_map(&node->vma[0], node);
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nvbe->node = node;
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return 0;
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}
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static int
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nv04_sgdma_unbind(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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nvkm_vm_unmap(&nvbe->node->vma[0]);
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return 0;
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}
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static struct ttm_backend_func nv04_sgdma_backend = {
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.bind = nv04_sgdma_bind,
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.unbind = nv04_sgdma_unbind,
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.destroy = nouveau_sgdma_destroy
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};
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static int
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nv50_sgdma_bind(struct ttm_tt *ttm, struct ttm_mem_reg *mem)
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{
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struct nouveau_sgdma_be *nvbe = (struct nouveau_sgdma_be *)ttm;
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struct nvkm_mem *node = mem->mm_node;
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/* noop: bound in move_notify() */
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if (ttm->sg) {
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node->sg = ttm->sg;
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node->pages = NULL;
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} else {
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node->sg = NULL;
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node->pages = nvbe->ttm.dma_address;
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}
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node->size = (mem->num_pages << PAGE_SHIFT) >> 12;
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return 0;
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}
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static int
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nv50_sgdma_unbind(struct ttm_tt *ttm)
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{
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/* noop: unbound in move_notify() */
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return 0;
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}
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static struct ttm_backend_func nv50_sgdma_backend = {
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.bind = nv50_sgdma_bind,
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.unbind = nv50_sgdma_unbind,
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.destroy = nouveau_sgdma_destroy
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};
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struct ttm_tt *
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nouveau_sgdma_create_ttm(struct ttm_bo_device *bdev,
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unsigned long size, uint32_t page_flags,
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struct page *dummy_read_page)
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{
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struct nouveau_drm *drm = nouveau_bdev(bdev);
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struct nouveau_sgdma_be *nvbe;
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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 (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA)
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nvbe->ttm.ttm.func = &nv04_sgdma_backend;
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else
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nvbe->ttm.ttm.func = &nv50_sgdma_backend;
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if (ttm_dma_tt_init(&nvbe->ttm, bdev, size, page_flags, dummy_read_page))
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/*
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* A failing ttm_dma_tt_init() will call ttm_tt_destroy()
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* and thus our nouveau_sgdma_destroy() hook, so we don't need
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* to free nvbe here.
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*/
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return NULL;
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return &nvbe->ttm.ttm;
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}
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