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