122 lines
3.0 KiB
C
122 lines
3.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/* Copyright (c) 2018 The Linux Foundation. All rights reserved. */
|
|
|
|
#include <linux/dma-mapping.h>
|
|
|
|
#include "msm_drv.h"
|
|
#include "msm_mmu.h"
|
|
#include "adreno/adreno_gpu.h"
|
|
#include "adreno/a2xx.xml.h"
|
|
|
|
struct msm_gpummu {
|
|
struct msm_mmu base;
|
|
struct msm_gpu *gpu;
|
|
dma_addr_t pt_base;
|
|
uint32_t *table;
|
|
};
|
|
#define to_msm_gpummu(x) container_of(x, struct msm_gpummu, base)
|
|
|
|
#define GPUMMU_VA_START SZ_16M
|
|
#define GPUMMU_VA_RANGE (0xfff * SZ_64K)
|
|
#define GPUMMU_PAGE_SIZE SZ_4K
|
|
#define TABLE_SIZE (sizeof(uint32_t) * GPUMMU_VA_RANGE / GPUMMU_PAGE_SIZE)
|
|
|
|
static void msm_gpummu_detach(struct msm_mmu *mmu)
|
|
{
|
|
}
|
|
|
|
static int msm_gpummu_map(struct msm_mmu *mmu, uint64_t iova,
|
|
struct sg_table *sgt, size_t len, int prot)
|
|
{
|
|
struct msm_gpummu *gpummu = to_msm_gpummu(mmu);
|
|
unsigned idx = (iova - GPUMMU_VA_START) / GPUMMU_PAGE_SIZE;
|
|
struct sg_dma_page_iter dma_iter;
|
|
unsigned prot_bits = 0;
|
|
|
|
if (prot & IOMMU_WRITE)
|
|
prot_bits |= 1;
|
|
if (prot & IOMMU_READ)
|
|
prot_bits |= 2;
|
|
|
|
for_each_sgtable_dma_page(sgt, &dma_iter, 0) {
|
|
dma_addr_t addr = sg_page_iter_dma_address(&dma_iter);
|
|
int i;
|
|
|
|
for (i = 0; i < PAGE_SIZE; i += GPUMMU_PAGE_SIZE)
|
|
gpummu->table[idx++] = (addr + i) | prot_bits;
|
|
}
|
|
|
|
/* we can improve by deferring flush for multiple map() */
|
|
gpu_write(gpummu->gpu, REG_A2XX_MH_MMU_INVALIDATE,
|
|
A2XX_MH_MMU_INVALIDATE_INVALIDATE_ALL |
|
|
A2XX_MH_MMU_INVALIDATE_INVALIDATE_TC);
|
|
return 0;
|
|
}
|
|
|
|
static int msm_gpummu_unmap(struct msm_mmu *mmu, uint64_t iova, size_t len)
|
|
{
|
|
struct msm_gpummu *gpummu = to_msm_gpummu(mmu);
|
|
unsigned idx = (iova - GPUMMU_VA_START) / GPUMMU_PAGE_SIZE;
|
|
unsigned i;
|
|
|
|
for (i = 0; i < len / GPUMMU_PAGE_SIZE; i++, idx++)
|
|
gpummu->table[idx] = 0;
|
|
|
|
gpu_write(gpummu->gpu, REG_A2XX_MH_MMU_INVALIDATE,
|
|
A2XX_MH_MMU_INVALIDATE_INVALIDATE_ALL |
|
|
A2XX_MH_MMU_INVALIDATE_INVALIDATE_TC);
|
|
return 0;
|
|
}
|
|
|
|
static void msm_gpummu_resume_translation(struct msm_mmu *mmu)
|
|
{
|
|
}
|
|
|
|
static void msm_gpummu_destroy(struct msm_mmu *mmu)
|
|
{
|
|
struct msm_gpummu *gpummu = to_msm_gpummu(mmu);
|
|
|
|
dma_free_attrs(mmu->dev, TABLE_SIZE, gpummu->table, gpummu->pt_base,
|
|
DMA_ATTR_FORCE_CONTIGUOUS);
|
|
|
|
kfree(gpummu);
|
|
}
|
|
|
|
static const struct msm_mmu_funcs funcs = {
|
|
.detach = msm_gpummu_detach,
|
|
.map = msm_gpummu_map,
|
|
.unmap = msm_gpummu_unmap,
|
|
.destroy = msm_gpummu_destroy,
|
|
.resume_translation = msm_gpummu_resume_translation,
|
|
};
|
|
|
|
struct msm_mmu *msm_gpummu_new(struct device *dev, struct msm_gpu *gpu)
|
|
{
|
|
struct msm_gpummu *gpummu;
|
|
|
|
gpummu = kzalloc(sizeof(*gpummu), GFP_KERNEL);
|
|
if (!gpummu)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
gpummu->table = dma_alloc_attrs(dev, TABLE_SIZE + 32, &gpummu->pt_base,
|
|
GFP_KERNEL | __GFP_ZERO, DMA_ATTR_FORCE_CONTIGUOUS);
|
|
if (!gpummu->table) {
|
|
kfree(gpummu);
|
|
return ERR_PTR(-ENOMEM);
|
|
}
|
|
|
|
gpummu->gpu = gpu;
|
|
msm_mmu_init(&gpummu->base, dev, &funcs, MSM_MMU_GPUMMU);
|
|
|
|
return &gpummu->base;
|
|
}
|
|
|
|
void msm_gpummu_params(struct msm_mmu *mmu, dma_addr_t *pt_base,
|
|
dma_addr_t *tran_error)
|
|
{
|
|
dma_addr_t base = to_msm_gpummu(mmu)->pt_base;
|
|
|
|
*pt_base = base;
|
|
*tran_error = base + TABLE_SIZE; /* 32-byte aligned */
|
|
}
|