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      1 /*	$NetBSD: nouveau_nvkm_subdev_mmu_vmmnv41.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_vmmnv41.c,v 1.3 2021/12/19 10:51:58 riastradh Exp $");
     26 
     27 #include "vmm.h"
     28 
     29 #include <subdev/timer.h>
     30 
     31 static void __unused
     32 nv41_vmm_pgt_pte(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     33 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map, u64 addr)
     34 {
     35 	u32 data = (addr >> 7) | 0x00000001; /* VALID. */
     36 	while (ptes--) {
     37 		VMM_WO032(pt, vmm, ptei++ * 4, data);
     38 		data += 0x00000020;
     39 	}
     40 }
     41 
     42 #ifndef __NetBSD__
     43 static void
     44 nv41_vmm_pgt_sgl(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     45 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
     46 {
     47 	VMM_MAP_ITER_SGL(vmm, pt, ptei, ptes, map, nv41_vmm_pgt_pte);
     48 }
     49 #endif
     50 
     51 static void
     52 nv41_vmm_pgt_dma(struct nvkm_vmm *vmm, struct nvkm_mmu_pt *pt,
     53 		 u32 ptei, u32 ptes, struct nvkm_vmm_map *map)
     54 {
     55 #if PAGE_SHIFT == 12
     56 	nvkm_kmap(pt->memory);
     57 	while (ptes--) {
     58 		const u32 data = (*map->dma++ >> 7) | 0x00000001;
     59 		VMM_WO032(pt, vmm, ptei++ * 4, data);
     60 	}
     61 	nvkm_done(pt->memory);
     62 #else
     63 	VMM_MAP_ITER_DMA(vmm, pt, ptei, ptes, map, nv41_vmm_pgt_pte);
     64 #endif
     65 }
     66 
     67 static void
     68 nv41_vmm_pgt_unmap(struct nvkm_vmm *vmm,
     69 		   struct nvkm_mmu_pt *pt, u32 ptei, u32 ptes)
     70 {
     71 	VMM_FO032(pt, vmm, ptei * 4, 0, ptes);
     72 }
     73 
     74 static const struct nvkm_vmm_desc_func
     75 nv41_vmm_desc_pgt = {
     76 	.unmap = nv41_vmm_pgt_unmap,
     77 	.dma = nv41_vmm_pgt_dma,
     78 #ifndef __NetBSD__
     79 	.sgl = nv41_vmm_pgt_sgl,
     80 #endif
     81 };
     82 
     83 static const struct nvkm_vmm_desc
     84 nv41_vmm_desc_12[] = {
     85 	{ PGT, 17, 4, 0x1000, &nv41_vmm_desc_pgt },
     86 	{}
     87 };
     88 
     89 static void
     90 nv41_vmm_flush(struct nvkm_vmm *vmm, int level)
     91 {
     92 	struct nvkm_subdev *subdev = &vmm->mmu->subdev;
     93 	struct nvkm_device *device = subdev->device;
     94 
     95 	mutex_lock(&subdev->mutex);
     96 	nvkm_wr32(device, 0x100810, 0x00000022);
     97 	nvkm_msec(device, 2000,
     98 		if (nvkm_rd32(device, 0x100810) & 0x00000020)
     99 			break;
    100 	);
    101 	nvkm_wr32(device, 0x100810, 0x00000000);
    102 	mutex_unlock(&subdev->mutex);
    103 }
    104 
    105 static const struct nvkm_vmm_func
    106 nv41_vmm = {
    107 	.valid = nv04_vmm_valid,
    108 	.flush = nv41_vmm_flush,
    109 	.page = {
    110 		{ 12, &nv41_vmm_desc_12[0], NVKM_VMM_PAGE_HOST },
    111 		{}
    112 	}
    113 };
    114 
    115 int
    116 nv41_vmm_new(struct nvkm_mmu *mmu, bool managed, u64 addr, u64 size,
    117 	     void *argv, u32 argc, struct lock_class_key *key, const char *name,
    118 	     struct nvkm_vmm **pvmm)
    119 {
    120 	return nv04_vmm_new_(&nv41_vmm, mmu, 0, managed, addr, size,
    121 			     argv, argc, key, name, pvmm);
    122 }
    123