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      1 /*	$NetBSD: nouveau_nvkm_subdev_mmu_vmmnv04.c,v 1.3 2021/12/19 10:51:58 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2017 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  */
     24 #include <sys/cdefs.h>
     25 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_mmu_vmmnv04.c,v 1.3 2021/12/19 10:51:58 riastradh Exp $");
     26 
     27 #include "vmm.h"
     28 
     29 #include <nvif/if000d.h>
     30 #include <nvif/unpack.h>
     31 
     32 static inline void
     33 nv04_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     34 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
     35 {
     36 	u32 data = addr | 0x00000003; /* PRESENT, RW. */
     37 	while (ptes--) {
     38 		VMM_WO032(pt, vmm, 8 + ptei++ * 4, data);
     39 		data += 0x00001000;
     40 	}
     41 }
     42 
     43 #ifndef __NetBSD__
     44 static void
     45 nv04_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     46 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
     47 {
     48 	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
     49 }
     50 #endif
     51 
     52 static void
     53 nv04_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     54 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
     55 {
     56 #if PAGE_SHIFT == 12
     57 	nvkm_kmap(pt->memory);
     58 	while (ptes--)
     59 		VMM_WO032(pt, vmm, 8 + (ptei++ * 4), *map->dma++ | 0x00000003);
     60 	nvkm_done(pt->memory);
     61 #else
     62 	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv04_vmm_pgt_pte);
     63 #endif
     64 }
     65 
     66 static void
     67 nv04_vmm_pgt_unmap(struct nvkm_vmm *vmm,
     68 		   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
     69 {
     70 	VMM_FO032(pt, vmm, 8 + (ptei * 4), 0, ptes);
     71 }
     72 
     73 static const struct nvkm_vmm_desc_func
     74 nv04_vmm_desc_pgt = {
     75 	.unmap = nv04_vmm_pgt_unmap,
     76 	.dma = nv04_vmm_pgt_dma,
     77 #ifndef __NetBSD__
     78 	.sgl = nv04_vmm_pgt_sgl,
     79 #endif
     80 };
     81 
     82 static const struct nvkm_vmm_desc
     83 nv04_vmm_desc_12[] = {
     84 	{ PGT, 15, 4, 0x1000, &nv04_vmm_desc_pgt },
     85 	{}
     86 };
     87 
     88 int
     89 nv04_vmm_valid(struct nvkm_vmm *vmm, void *argv, u32 argc,
     90 	       struct nvkm_vmm_map *map)
     91 {
     92 	union {
     93 		struct nv04_vmm_map_vn vn;
     94 	} *args = argv;
     95 	int ret = -ENOSYS;
     96 	if ((ret = nvif_unvers(ret, &argv, &argc, args->vn)))
     97 		VMM_DEBUG(vmm, "args");
     98 	return ret;
     99 }
    100 
    101 static const struct nvkm_vmm_func
    102 nv04_vmm = {
    103 	.valid = nv04_vmm_valid,
    104 	.page = {
    105 		{ 12, &nv04_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
    106 		{}
    107 	}
    108 };
    109 
    110 int
    111 nv04_vmm_new_(const struct nvkm_vmm_func *func, struct nvkm_mmu *mmu,
    112 	      u32 pd_header, bool managed, u64 addr, u64 size,
    113 	      void *argv, u32 argc, struct lock_class_key *key,
    114 	      const char *name, struct nvkm_vmm **pvmm)
    115 {
    116 	union {
    117 		struct nv04_vmm_vn vn;
    118 	} *args = argv;
    119 	int ret;
    120 
    121 	ret = nvkm_vmm_new_(func, mmu, pd_header, managed, addr, size,
    122 			    key, name, pvmm);
    123 	if (ret)
    124 		return ret;
    125 
    126 	return nvif_unvers(-ENOSYS, &argv, &argc, args->vn);
    127 }
    128 
    129 int
    130 nv04_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
    131 	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
    132 	     struct nvkm_vmm **pvmm)
    133 {
    134 	struct nvkm_memory *mem;
    135 	struct nvkm_vmm *vmm;
    136 	int ret;
    137 
    138 	ret = nv04_vmm_new_(&nv04_vmm, mmu, 8, managed, addr, size,
    139 			    argv, argc, key, name, &vmm);
    140 	*pvmm = vmm;
    141 	if (ret)
    142 		return ret;
    143 
    144 	mem = vmm->pd->pt[0]->memory;
    145 	nvkm_kmap(mem);
    146 	nvkm_wo32(mem, 0x00000, 0x0002103d); /* PCI, RW, PT, !LN */
    147 	nvkm_wo32(mem, 0x00004, vmm->limit - 1);
    148 	nvkm_done(mem);
    149 	return 0;
    150 }
    151