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/*
* Copyright 2010 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 <subdev/mmu.h>
#include <subdev/bar.h>
#include <subdev/fb.h>
#include <subdev/timer.h>
#include <core/engine.h>
#include <core/gpuobj.h>
struct nv50_mmu_priv {
struct nvkm_mmu base;
};
static void
nv50_vm_map_pgt(struct nvkm_gpuobj *pgd, u32 pde, struct nvkm_gpuobj *pgt[2])
{
u64 phys = 0xdeadcafe00000000ULL;
u32 coverage = 0;
if (pgt[0]) {
phys = 0x00000003 | pgt[0]->addr; /* present, 4KiB pages */
coverage = (pgt[0]->size >> 3) << 12;
} else
if (pgt[1]) {
phys = 0x00000001 | pgt[1]->addr; /* present */
coverage = (pgt[1]->size >> 3) << 16;
}
if (phys & 1) {
if (coverage <= 32 * 1024 * 1024)
phys |= 0x60;
else if (coverage <= 64 * 1024 * 1024)
phys |= 0x40;
else if (coverage <= 128 * 1024 * 1024)
phys |= 0x20;
}
nv_wo32(pgd, (pde * 8) + 0, lower_32_bits(phys));
nv_wo32(pgd, (pde * 8) + 4, upper_32_bits(phys));
}
static inline u64
vm_addr(struct nvkm_vma *vma, u64 phys, u32 memtype, u32 target)
{
phys |= 1; /* present */
phys |= (u64)memtype << 40;
phys |= target << 4;
if (vma->access & NV_MEM_ACCESS_SYS)
phys |= (1 << 6);
if (!(vma->access & NV_MEM_ACCESS_WO))
phys |= (1 << 3);
return phys;
}
static void
nv50_vm_map(struct nvkm_vma *vma, struct nvkm_gpuobj *pgt,
struct nvkm_mem *mem, u32 pte, u32 cnt, u64 phys, u64 delta)
{
u32 comp = (mem->memtype & 0x180) >> 7;
u32 block, target;
int i;
/* IGPs don't have real VRAM, re-target to stolen system memory */
target = 0;
if (nvkm_fb(vma->vm->mmu)->ram->stolen) {
phys += nvkm_fb(vma->vm->mmu)->ram->stolen;
target = 3;
}
phys = vm_addr(vma, phys, mem->memtype, target);
pte <<= 3;
cnt <<= 3;
while (cnt) {
u32 offset_h = upper_32_bits(phys);
u32 offset_l = lower_32_bits(phys);
for (i = 7; i >= 0; i--) {
block = 1 << (i + 3);
if (cnt >= block && !(pte & (block - 1)))
break;
}
offset_l |= (i << 7);
phys += block << (vma->node->type - 3);
cnt -= block;
if (comp) {
u32 tag = mem->tag->offset + ((delta >> 16) * comp);
offset_h |= (tag << 17);
delta += block << (vma->node->type - 3);
}
while (block) {
nv_wo32(pgt, pte + 0, offset_l);
nv_wo32(pgt, pte + 4, offset_h);
pte += 8;
block -= 8;
}
}
}
static void
nv50_vm_map_sg(struct nvkm_vma *vma, struct nvkm_gpuobj *pgt,
struct nvkm_mem *mem, u32 pte, u32 cnt, dma_addr_t *list)
{
u32 target = (vma->access & NV_MEM_ACCESS_NOSNOOP) ? 3 : 2;
pte <<= 3;
while (cnt--) {
u64 phys = vm_addr(vma, (u64)*list++, mem->memtype, target);
nv_wo32(pgt, pte + 0, lower_32_bits(phys));
nv_wo32(pgt, pte + 4, upper_32_bits(phys));
pte += 8;
}
}
static void
nv50_vm_unmap(struct nvkm_gpuobj *pgt, u32 pte, u32 cnt)
{
pte <<= 3;
while (cnt--) {
nv_wo32(pgt, pte + 0, 0x00000000);
nv_wo32(pgt, pte + 4, 0x00000000);
pte += 8;
}
}
static void
nv50_vm_flush(struct nvkm_vm *vm)
{
struct nv50_mmu_priv *priv = (void *)vm->mmu;
struct nvkm_bar *bar = nvkm_bar(priv);
struct nvkm_engine *engine;
int i, vme;
bar->flush(bar);
mutex_lock(&nv_subdev(priv)->mutex);
for (i = 0; i < NVDEV_SUBDEV_NR; i++) {
if (!atomic_read(&vm->engref[i]))
continue;
/* unfortunate hw bug workaround... */
engine = nvkm_engine(priv, i);
if (engine && engine->tlb_flush) {
engine->tlb_flush(engine);
continue;
}
switch (i) {
case NVDEV_ENGINE_GR : vme = 0x00; break;
case NVDEV_ENGINE_VP :
case NVDEV_ENGINE_MSPDEC: vme = 0x01; break;
case NVDEV_SUBDEV_BAR : vme = 0x06; break;
case NVDEV_ENGINE_MSPPP :
case NVDEV_ENGINE_MPEG : vme = 0x08; break;
case NVDEV_ENGINE_BSP :
case NVDEV_ENGINE_MSVLD : vme = 0x09; break;
case NVDEV_ENGINE_CIPHER:
case NVDEV_ENGINE_SEC : vme = 0x0a; break;
case NVDEV_ENGINE_CE0 : vme = 0x0d; break;
default:
continue;
}
nv_wr32(priv, 0x100c80, (vme << 16) | 1);
if (!nv_wait(priv, 0x100c80, 0x00000001, 0x00000000))
nv_error(priv, "vm flush timeout: engine %d\n", vme);
}
mutex_unlock(&nv_subdev(priv)->mutex);
}
static int
nv50_vm_create(struct nvkm_mmu *mmu, u64 offset, u64 length,
u64 mm_offset, struct nvkm_vm **pvm)
{
u32 block = (1 << (mmu->pgt_bits + 12));
if (block > length)
block = length;
return nvkm_vm_create(mmu, offset, length, mm_offset, block, pvm);
}
static int
nv50_mmu_ctor(struct nvkm_object *parent, struct nvkm_object *engine,
struct nvkm_oclass *oclass, void *data, u32 size,
struct nvkm_object **pobject)
{
struct nv50_mmu_priv *priv;
int ret;
ret = nvkm_mmu_create(parent, engine, oclass, "VM", "vm", &priv);
*pobject = nv_object(priv);
if (ret)
return ret;
priv->base.limit = 1ULL << 40;
priv->base.dma_bits = 40;
priv->base.pgt_bits = 29 - 12;
priv->base.spg_shift = 12;
priv->base.lpg_shift = 16;
priv->base.create = nv50_vm_create;
priv->base.map_pgt = nv50_vm_map_pgt;
priv->base.map = nv50_vm_map;
priv->base.map_sg = nv50_vm_map_sg;
priv->base.unmap = nv50_vm_unmap;
priv->base.flush = nv50_vm_flush;
return 0;
}
struct nvkm_oclass
nv50_mmu_oclass = {
.handle = NV_SUBDEV(MMU, 0x50),
.ofuncs = &(struct nvkm_ofuncs) {
.ctor = nv50_mmu_ctor,
.dtor = _nvkm_mmu_dtor,
.init = _nvkm_mmu_init,
.fini = _nvkm_mmu_fini,
},
};
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