Commit eaf1a691 authored by Ben Skeggs's avatar Ben Skeggs

drm/nouveau/mmu: add base for type-based memory allocation

Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
parent 51645eb7
......@@ -14,6 +14,8 @@
#define NVIF_CLASS_SW_NV50 /* if0005.h */ -0x00000006
#define NVIF_CLASS_SW_GF100 /* if0005.h */ -0x00000007
#define NVIF_CLASS_MEM /* if000a.h */ 0x8000000a
#define NVIF_CLASS_VMM /* if000c.h */ 0x8000000c
#define NVIF_CLASS_VMM_NV04 /* if000d.h */ 0x8000000d
#define NVIF_CLASS_VMM_NV50 /* if500d.h */ 0x8000500d
......
#ifndef __NVIF_IF000A_H__
#define __NVIF_IF000A_H__
struct nvif_mem_ram_vn {
};
struct nvif_mem_ram_v0 {
__u8 version;
__u8 pad01[7];
dma_addr_t *dma;
struct scatterlist *sgl;
};
#endif
......@@ -12,6 +12,8 @@ nvkm-y += nvkm/subdev/mmu/gm20b.o
nvkm-y += nvkm/subdev/mmu/gp100.o
nvkm-y += nvkm/subdev/mmu/gp10b.o
nvkm-y += nvkm/subdev/mmu/mem.o
nvkm-y += nvkm/subdev/mmu/vmm.o
nvkm-y += nvkm/subdev/mmu/vmmnv04.o
nvkm-y += nvkm/subdev/mmu/vmmnv41.o
......
/*
* 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.
*/
#define nvkm_mem(p) container_of((p), struct nvkm_mem, memory)
#include "mem.h"
#include <core/memory.h>
#include <nvif/if000a.h>
#include <nvif/unpack.h>
struct nvkm_mem {
struct nvkm_memory memory;
enum nvkm_memory_target target;
struct nvkm_mmu *mmu;
u64 pages;
struct page **mem;
union {
struct scatterlist *sgl;
dma_addr_t *dma;
};
};
static enum nvkm_memory_target
nvkm_mem_target(struct nvkm_memory *memory)
{
return nvkm_mem(memory)->target;
}
static u8
nvkm_mem_page(struct nvkm_memory *memory)
{
return PAGE_SHIFT;
}
static u64
nvkm_mem_addr(struct nvkm_memory *memory)
{
struct nvkm_mem *mem = nvkm_mem(memory);
if (mem->pages == 1 && mem->mem)
return mem->dma[0];
return ~0ULL;
}
static u64
nvkm_mem_size(struct nvkm_memory *memory)
{
return nvkm_mem(memory)->pages << PAGE_SHIFT;
}
static int
nvkm_mem_map_dma(struct nvkm_memory *memory, u64 offset, struct nvkm_vmm *vmm,
struct nvkm_vma *vma, void *argv, u32 argc)
{
struct nvkm_mem *mem = nvkm_mem(memory);
struct nvkm_vmm_map map = {
.memory = &mem->memory,
.offset = offset,
.dma = mem->dma,
};
return nvkm_vmm_map(vmm, vma, argv, argc, &map);
}
static void *
nvkm_mem_dtor(struct nvkm_memory *memory)
{
struct nvkm_mem *mem = nvkm_mem(memory);
if (mem->mem) {
while (mem->pages--) {
dma_unmap_page(mem->mmu->subdev.device->dev,
mem->dma[mem->pages], PAGE_SIZE,
DMA_BIDIRECTIONAL);
__free_page(mem->mem[mem->pages]);
}
kvfree(mem->dma);
kvfree(mem->mem);
}
return mem;
}
static const struct nvkm_memory_func
nvkm_mem_dma = {
.dtor = nvkm_mem_dtor,
.target = nvkm_mem_target,
.page = nvkm_mem_page,
.addr = nvkm_mem_addr,
.size = nvkm_mem_size,
.map = nvkm_mem_map_dma,
};
static int
nvkm_mem_map_sgl(struct nvkm_memory *memory, u64 offset, struct nvkm_vmm *vmm,
struct nvkm_vma *vma, void *argv, u32 argc)
{
struct nvkm_mem *mem = nvkm_mem(memory);
struct nvkm_vmm_map map = {
.memory = &mem->memory,
.offset = offset,
.sgl = mem->sgl,
};
return nvkm_vmm_map(vmm, vma, argv, argc, &map);
}
static const struct nvkm_memory_func
nvkm_mem_sgl = {
.dtor = nvkm_mem_dtor,
.target = nvkm_mem_target,
.page = nvkm_mem_page,
.addr = nvkm_mem_addr,
.size = nvkm_mem_size,
.map = nvkm_mem_map_sgl,
};
int
nvkm_mem_map_host(struct nvkm_memory *memory, void **pmap)
{
struct nvkm_mem *mem = nvkm_mem(memory);
if (mem->mem) {
*pmap = vmap(mem->mem, mem->pages, VM_MAP, PAGE_KERNEL);
return *pmap ? 0 : -EFAULT;
}
return -EINVAL;
}
static int
nvkm_mem_new_host(struct nvkm_mmu *mmu, int type, u8 page, u64 size,
void *argv, u32 argc, struct nvkm_memory **pmemory)
{
struct device *dev = mmu->subdev.device->dev;
union {
struct nvif_mem_ram_vn vn;
struct nvif_mem_ram_v0 v0;
} *args = argv;
int ret = -ENOSYS;
enum nvkm_memory_target target;
struct nvkm_mem *mem;
gfp_t gfp = GFP_USER | __GFP_ZERO;
if ( (mmu->type[type].type & NVKM_MEM_COHERENT) &&
!(mmu->type[type].type & NVKM_MEM_UNCACHED))
target = NVKM_MEM_TARGET_HOST;
else
target = NVKM_MEM_TARGET_NCOH;
if (page != PAGE_SHIFT)
return -EINVAL;
if (!(mem = kzalloc(sizeof(*mem), GFP_KERNEL)))
return -ENOMEM;
mem->target = target;
mem->mmu = mmu;
*pmemory = &mem->memory;
if (!(ret = nvif_unpack(ret, &argv, &argc, args->v0, 0, 0, false))) {
if (args->v0.dma) {
nvkm_memory_ctor(&nvkm_mem_dma, &mem->memory);
mem->dma = args->v0.dma;
} else {
nvkm_memory_ctor(&nvkm_mem_sgl, &mem->memory);
mem->sgl = args->v0.sgl;
}
if (!IS_ALIGNED(size, PAGE_SIZE))
return -EINVAL;
mem->pages = size >> PAGE_SHIFT;
return 0;
} else
if ( (ret = nvif_unvers(ret, &argv, &argc, args->vn))) {
kfree(mem);
return ret;
}
nvkm_memory_ctor(&nvkm_mem_dma, &mem->memory);
size = ALIGN(size, PAGE_SIZE) >> PAGE_SHIFT;
if (!(mem->mem = kvmalloc(sizeof(*mem->mem) * size, GFP_KERNEL)))
return -ENOMEM;
if (!(mem->dma = kvmalloc(sizeof(*mem->dma) * size, GFP_KERNEL)))
return -ENOMEM;
if (mmu->dma_bits > 32)
gfp |= GFP_HIGHUSER;
else
gfp |= GFP_DMA32;
for (mem->pages = 0; size; size--, mem->pages++) {
struct page *p = alloc_page(gfp);
if (!p)
return -ENOMEM;
mem->dma[mem->pages] = dma_map_page(mmu->subdev.device->dev,
p, 0, PAGE_SIZE,
DMA_BIDIRECTIONAL);
if (dma_mapping_error(dev, mem->dma[mem->pages])) {
__free_page(p);
return -ENOMEM;
}
mem->mem[mem->pages] = p;
}
return 0;
}
int
nvkm_mem_new_type(struct nvkm_mmu *mmu, int type, u8 page, u64 size,
void *argv, u32 argc, struct nvkm_memory **pmemory)
{
struct nvkm_memory *memory = NULL;
int ret;
if (mmu->type[type].type & NVKM_MEM_VRAM) {
ret = mmu->func->mem.vram(mmu, type, page, size,
argv, argc, &memory);
} else {
ret = nvkm_mem_new_host(mmu, type, page, size,
argv, argc, &memory);
}
if (ret)
nvkm_memory_unref(&memory);
*pmemory = memory;
return ret;
}
#ifndef __NVKM_MEM_H__
#define __NVKM_MEM_H__
#include "priv.h"
int nvkm_mem_new_type(struct nvkm_mmu *, int type, u8 page, u64 size,
void *argv, u32 argc, struct nvkm_memory **);
int nvkm_mem_map_host(struct nvkm_memory *, void **pmap);
#endif
......@@ -15,6 +15,14 @@ struct nvkm_mmu_func {
u8 dma_bits;
u8 lpg_shift;
struct {
struct nvkm_sclass user;
int (*vram)(struct nvkm_mmu *, int type, u8 page, u64 size,
void *argv, u32 argc, struct nvkm_memory **);
int (*umap)(struct nvkm_mmu *, struct nvkm_memory *, void *argv,
u32 argc, u64 *addr, u64 *size, struct nvkm_vma **);
} mem;
struct {
struct nvkm_sclass user;
int (*ctor)(struct nvkm_mmu *, u64 addr, u64 size,
......
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