/*
* Copyright 2017 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.
*/
#include "vmm.h"
#include <subdev/timer.h>
static void
nv44_vmm_pgt_fill(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
dma_addr_t *list, u32 ptei, u32 ptes)
{
u32 pteo = (ptei << 2) & ~0x0000000f;
u32 tmp[4];
tmp[0] = nvkm_ro32(pt->memory, pteo + 0x0);
tmp[1] = nvkm_ro32(pt->memory, pteo + 0x4);
tmp[2] = nvkm_ro32(pt->memory, pteo + 0x8);
tmp[3] = nvkm_ro32(pt->memory, pteo + 0xc);
while (ptes--) {
u32 addr = (list ? *list++ : vmm->null) >> 12;
switch (ptei++ & 0x3) {
case 0:
tmp[0] &= ~0x07ffffff;
tmp[0] |= addr;
break;
case 1:
tmp[0] &= ~0xf8000000;
tmp[0] |= addr << 27;
tmp[1] &= ~0x003fffff;
tmp[1] |= addr >> 5;
break;
case 2:
tmp[1] &= ~0xffc00000;
tmp[1] |= addr << 22;
tmp[2] &= ~0x0001ffff;
tmp[2] |= addr >> 10;
break;
case 3:
tmp[2] &= ~0xfffe0000;
tmp[2] |= addr << 17;
tmp[3] &= ~0x00000fff;
tmp[3] |= addr >> 15;
break;
}
}
VMM_WO032(pt, vmm, pteo + 0x0, tmp[0]);
VMM_WO032(pt, vmm, pteo + 0x4, tmp[1]);
VMM_WO032(pt, vmm, pteo + 0x8, tmp[2]);
VMM_WO032(pt, vmm, pteo + 0xc, tmp[3] | 0x40000000);
}
static void
nv44_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
{
dma_addr_t tmp[4], i;
if (ptei & 3) {
const u32 pten = min(ptes, 4 - (ptei & 3));
for (i = 0; i < pten; i++, addr += 0x1000)
tmp[i] = addr;
nv44_vmm_pgt_fill(vmm, pt, tmp, ptei, pten);
ptei += pten;
ptes -= pten;
}
while (ptes >= 4) {
for (i = 0; i < 4; i++, addr += 0x1000)
tmp[i] = addr >> 12;
VMM_WO032(pt, vmm, ptei++ * 4, tmp[0] >> 0 | tmp[1] << 27);
VMM_WO032(pt, vmm, ptei++ * 4, tmp[1] >> 5 | tmp[2] << 22);
VMM_WO032(pt, vmm, ptei++ * 4, tmp[2] >> 10 | tmp[3] << 17);
VMM_WO032(pt, vmm, ptei++ * 4, tmp[3] >> 15 | 0x40000000);
ptes -= 4;
}
if (ptes) {
for (i = 0; i < ptes; i++, addr += 0x1000)
tmp[i] = addr;
nv44_vmm_pgt_fill(vmm, pt, tmp, ptei, ptes);
}
}
static void
nv44_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
{
VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv44_vmm_pgt_pte);
}
static void
nv44_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
{
#if PAGE_SHIFT == 12
nvkm_kmap(pt->memory);
if (ptei & 3) {
const u32 pten = min(ptes, 4 - (ptei & 3));
nv44_vmm_pgt_fill(vmm, pt, map->dma, ptei, pten);
ptei += pten;
ptes -= pten;
map->dma += pten;
}
while (ptes >= 4) {
u32 tmp[4], i;
for (i = 0; i < 4; i++)
tmp[i] = *map->dma++ >> 12;
VMM_WO032(pt, vmm, ptei++ * 4, tmp[0] >> 0 | tmp[1] << 27);
VMM_WO032(pt, vmm, ptei++ * 4, tmp[1] >> 5 | tmp[2] << 22);
VMM_WO032(pt, vmm, ptei++ * 4, tmp[2] >> 10 | tmp[3] << 17);
VMM_WO032(pt, vmm, ptei++ * 4, tmp[3] >> 15 | 0x40000000);
ptes -= 4;
}
if (ptes) {
nv44_vmm_pgt_fill(vmm, pt, map->dma, ptei, ptes);
map->dma += ptes;
}
nvkm_done(pt->memory);
#else
VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv44_vmm_pgt_pte);
#endif
}
static void
nv44_vmm_pgt_unmap(struct nvkm_vmm *vmm,
struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
{
nvkm_kmap(pt->memory);
if (ptei & 3) {
const u32 pten = min(ptes, 4 - (ptei & 3));
nv44_vmm_pgt_fill(vmm, pt, NULL, ptei, pten);
ptei += pten;
ptes -= pten;
}
while (ptes > 4) {
VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
VMM_WO032(pt, vmm, ptei++ * 4, 0x00000000);
ptes -= 4;
}
if (ptes)
nv44_vmm_pgt_fill(vmm, pt, NULL, ptei, ptes);
nvkm_done(pt->memory);
}
static const struct nvkm_vmm_desc_func
nv44_vmm_desc_pgt = {
.unmap = nv44_vmm_pgt_unmap,
.dma = nv44_vmm_pgt_dma,
.sgl = nv44_vmm_pgt_sgl,
};
static const struct nvkm_vmm_desc
nv44_vmm_desc_12[] = {
{ PGT, 17, 4, 0x80000, &nv44_vmm_desc_pgt },
{}
};
static void
nv44_vmm_flush(struct nvkm_vmm *vmm, int level)
{
struct nvkm_device *device = vmm->mmu->subdev.device;
nvkm_wr32(device, 0x100814, vmm->limit - 4096);
nvkm_wr32(device, 0x100808, 0x000000020);
nvkm_msec(device, 2000,
if (nvkm_rd32(device, 0x100808) & 0x00000001)
break;
);
nvkm_wr32(device, 0x100808, 0x00000000);
}
static const struct nvkm_vmm_func
nv44_vmm = {
.valid = nv04_vmm_valid,
.flush = nv44_vmm_flush,
.page = {
{ 12, &nv44_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
{}
}
};
int
nv44_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
void *argv, u32 argc, struct lock_class_key *key, const char *name,
struct nvkm_vmm **pvmm)
{
struct nvkm_subdev *subdev = &mmu->subdev;
struct nvkm_vmm *vmm;
int ret;
ret = nv04_vmm_new_(&nv44_vmm, mmu, 0, managed, addr, size,
argv, argc, key, name, &vmm);
*pvmm = vmm;
if (ret)
return ret;
vmm->nullp = dma_alloc_coherent(subdev->device->dev, 16 * 1024,
&vmm->null, GFP_KERNEL);
if (!vmm->nullp) {
nvkm_warn(subdev, "unable to allocate dummy pages\n");
vmm->null = 0;
}
return 0;
}
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