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/*
* Copyright 2012 Red Hat Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*
* Authors: Ben Skeggs
*/
#include "nv04.h"
#include "vmm.h"
#include <nvif/class.h>
#define NV04_PDMA_SIZE (128 * 1024 * 1024)
#define NV04_PDMA_PAGE ( 4 * 1024)
/*******************************************************************************
* VM map/unmap callbacks
******************************************************************************/
static void
nv04_vm_map_sg(struct nvkm_vma *vma, struct nvkm_memory *pgt,
struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list)
{
pte = 0x00008 + (pte * 4);
nvkm_kmap(pgt);
while (cnt) {
u32 page = PAGE_SIZE / NV04_PDMA_PAGE;
u32 phys = (u32)*list++;
while (cnt && page--) {
nvkm_wo32(pgt, pte, phys | 3);
phys += NV04_PDMA_PAGE;
pte += 4;
cnt -= 1;
}
}
nvkm_done(pgt);
}
static void
nv04_vm_unmap(struct nvkm_vma *vma, struct nvkm_memory *pgt, u32 pte, u32 cnt)
{
pte = 0x00008 + (pte * 4);
nvkm_kmap(pgt);
while (cnt--) {
nvkm_wo32(pgt, pte, 0x00000000);
pte += 4;
}
nvkm_done(pgt);
}
static void
nv04_vm_flush(struct nvkm_vm *vm)
{
}
/*******************************************************************************
* MMU subdev
******************************************************************************/
static int
nv04_mmu_oneinit(struct nvkm_mmu *mmu)
{
mmu->vmm->pgt[0].mem[0] = mmu->vmm->pd->pt[0]->memory;
mmu->vmm->pgt[0].refcount[0] = 1;
return 0;
}
void *
nv04_mmu_dtor(struct nvkm_mmu *base)
{
struct nv04_mmu *mmu = nv04_mmu(base);
struct nvkm_device *device = mmu->base.subdev.device;
if (mmu->base.vmm)
nvkm_memory_unref(&mmu->base.vmm->pgt[0].mem[0]);
if (mmu->nullp) {
dma_free_coherent(device->dev, 16 * 1024,
mmu->nullp, mmu->null);
}
return mmu;
}
int
nv04_mmu_new_(const struct nvkm_mmu_func *func, struct nvkm_device *device,
int index, struct nvkm_mmu **pmmu)
{
struct nv04_mmu *mmu;
if (!(mmu = kzalloc(sizeof(*mmu), GFP_KERNEL)))
return -ENOMEM;
*pmmu = &mmu->base;
nvkm_mmu_ctor(func, device, index, &mmu->base);
return 0;
}
const struct nvkm_mmu_func
nv04_mmu = {
.oneinit = nv04_mmu_oneinit,
.limit = NV04_PDMA_SIZE,
.dma_bits = 32,
.pgt_bits = 32 - 12,
.spg_shift = 12,
.lpg_shift = 12,
.map_sg = nv04_vm_map_sg,
.unmap = nv04_vm_unmap,
.flush = nv04_vm_flush,
.vmm = {{ -1, -1, NVIF_CLASS_VMM_NV04}, nv04_vmm_new, true },
};
int
nv04_mmu_new(struct nvkm_device *device, int index, struct nvkm_mmu **pmmu)
{
return nvkm_mmu_new_(&nv04_mmu, device, index, pmmu);
}
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