LXR linux/drivers/gpu/drm/nouveau/nvkm/subdev/mmu/vmmnv41.c

   1/*
   2 * Copyright 2017 Red Hat Inc.
   3 *
   4 * Permission is hereby granted, free of charge, to any person obtaining a
   5 * copy of this software and associated documentation files (the "Software"),
   6 * to deal in the Software without restriction, including without limitation
   7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8 * and/or sell copies of the Software, and to permit persons to whom the
   9 * Software is furnished to do so, subject to the following conditions:
  10 *
  11 * The above copyright notice and this permission notice shall be included in
  12 * all copies or substantial portions of the Software.
  13 *
  14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20 * OTHER DEALINGS IN THE SOFTWARE.
  21 */
  22#include "vmm.h"
  23
  24#include <subdev/timer.h>
  25
  26static void
  27nv41_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
  28                 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
  29{
  30        u32 data = (addr >> 7) | 0x00000001; /* VALID. */
  31        while (ptes--) {
  32                VMM_WO032(pt, vmm, ptei++ * 4, data);
  33                data += 0x00000020;
  34        }
  35}
  36
  37static void
  38nv41_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
  39                 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
  40{
  41        VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv41_vmm_pgt_pte);
  42}
  43
  44static void
  45nv41_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
  46                 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
  47{
  48#if PAGE_SHIFT == 12
  49        nvkm_kmap(pt->memory);
  50        while (ptes--) {
  51                const u32 data = (*map->dma++ >> 7) | 0x00000001;
  52                VMM_WO032(pt, vmm, ptei++ * 4, data);
  53        }
  54        nvkm_done(pt->memory);
  55#else
  56        VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv41_vmm_pgt_pte);
  57#endif
  58}
  59
  60static void
  61nv41_vmm_pgt_unmap(struct nvkm_vmm *vmm,
  62                   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
  63{
  64        VMM_FO032(pt, vmm, ptei * 4, 0, ptes);
  65}
  66
  67static const struct nvkm_vmm_desc_func
  68nv41_vmm_desc_pgt = {
  69        .unmap = nv41_vmm_pgt_unmap,
  70        .dma = nv41_vmm_pgt_dma,
  71        .sgl = nv41_vmm_pgt_sgl,
  72};
  73
  74static const struct nvkm_vmm_desc
  75nv41_vmm_desc_12[] = {
  76        { PGT, 17, 4, 0x1000, &nv41_vmm_desc_pgt },
  77        {}
  78};
  79
  80static void
  81nv41_vmm_flush(struct nvkm_vmm *vmm, int level)
  82{
  83        struct nvkm_subdev *subdev = &vmm->mmu->subdev;
  84        struct nvkm_device *device = subdev->device;
  85
  86        mutex_lock(&subdev->mutex);
  87        nvkm_wr32(device, 0x100810, 0x00000022);
  88        nvkm_msec(device, 2000,
  89                if (nvkm_rd32(device, 0x100810) & 0x00000020)
  90                        break;
  91        );
  92        nvkm_wr32(device, 0x100810, 0x00000000);
  93        mutex_unlock(&subdev->mutex);
  94}
  95
  96static const struct nvkm_vmm_func
  97nv41_vmm = {
  98        .valid = nv04_vmm_valid,
  99        .flush = nv41_vmm_flush,
 100        .page = {
 101                { 12, &nv41_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
 102                {}
 103        }
 104};
 105
 106int
 107nv41_vmm_new(struct nvkm_mmu *mmu, u64 addr, u64 size, void *argv, u32 argc,
 108             struct lock_class_key *key, const char *name,
 109             struct nvkm_vmm **pvmm)
 110{
 111        return nv04_vmm_new_(&nv41_vmm, mmu, 0, addr, size,
 112                             argv, argc, key, name, pvmm);
 113}
 114