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_device *device = vmm->mmu->subdev.device;
 84
 85	mutex_lock(&vmm->mmu->mutex);
 86	nvkm_wr32(device, 0x100810, 0x00000022);
 87	nvkm_msec(device, 2000,
 88		if (nvkm_rd32(device, 0x100810) & 0x00000020)
 89			break;
 90	);
 91	nvkm_wr32(device, 0x100810, 0x00000000);
 92	mutex_unlock(&vmm->mmu->mutex);
 93}
 94
 95static const struct nvkm_vmm_func
 96nv41_vmm = {
 97	.valid = nv04_vmm_valid,
 98	.flush = nv41_vmm_flush,
 99	.page = {
100		{ 12, &nv41_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
101		{}
102	}
103};
104
105int
106nv41_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
107	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
108	     struct nvkm_vmm **pvmm)
109{
110	return nv04_vmm_new_(&nv41_vmm, mmu, 0, managed, addr, size,
111			     argv, argc, key, name, pvmm);
112}