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      1 /*	$NetBSD: nouveau_nvif_mmu.c,v 1.2 2021/12/18 23:45:33 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_nvif_mmu.c,v 1.2 2021/12/18 23:45:33 riastradh Exp $");
     26 
     27 #include <nvif/mmu.h>
     28 
     29 #include <nvif/class.h>
     30 #include <nvif/if0008.h>
     31 
     32 void
     33 nvif_mmu_fini(struct nvif_mmu *mmu)
     34 {
     35 	kfree(mmu->kind);
     36 	kfree(mmu->type);
     37 	kfree(mmu->heap);
     38 	nvif_object_fini(&mmu->object);
     39 }
     40 
     41 int
     42 nvif_mmu_init(struct nvif_object *parent, s32 oclass, struct nvif_mmu *mmu)
     43 {
     44 	static const struct nvif_mclass mems[] = {
     45 		{ NVIF_CLASS_MEM_GF100, -1 },
     46 		{ NVIF_CLASS_MEM_NV50 , -1 },
     47 		{ NVIF_CLASS_MEM_NV04 , -1 },
     48 		{}
     49 	};
     50 	struct nvif_mmu_v0 args;
     51 	int ret, i;
     52 
     53 	args.version = 0;
     54 	mmu->heap = NULL;
     55 	mmu->type = NULL;
     56 	mmu->kind = NULL;
     57 
     58 	ret = nvif_object_init(parent, 0, oclass, &args, sizeof(args),
     59 			       &mmu->object);
     60 	if (ret)
     61 		goto done;
     62 
     63 	mmu->dmabits = args.dmabits;
     64 	mmu->heap_nr = args.heap_nr;
     65 	mmu->type_nr = args.type_nr;
     66 	mmu->kind_nr = args.kind_nr;
     67 
     68 	ret = nvif_mclass(&mmu->object, mems);
     69 	if (ret < 0)
     70 		goto done;
     71 	mmu->mem = mems[ret].oclass;
     72 
     73 	mmu->heap = kmalloc_array(mmu->heap_nr, sizeof(*mmu->heap),
     74 				  GFP_KERNEL);
     75 	mmu->type = kmalloc_array(mmu->type_nr, sizeof(*mmu->type),
     76 				  GFP_KERNEL);
     77 	if (ret = -ENOMEM, !mmu->heap || !mmu->type)
     78 		goto done;
     79 
     80 	mmu->kind = kmalloc_array(mmu->kind_nr, sizeof(*mmu->kind),
     81 				  GFP_KERNEL);
     82 	if (!mmu->kind && mmu->kind_nr)
     83 		goto done;
     84 
     85 	for (i = 0; i < mmu->heap_nr; i++) {
     86 		struct nvif_mmu_heap_v0 args = { .index = i };
     87 
     88 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_HEAP,
     89 				       &args, sizeof(args));
     90 		if (ret)
     91 			goto done;
     92 
     93 		mmu->heap[i].size = args.size;
     94 	}
     95 
     96 	for (i = 0; i < mmu->type_nr; i++) {
     97 		struct nvif_mmu_type_v0 args = { .index = i };
     98 
     99 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_TYPE,
    100 				       &args, sizeof(args));
    101 		if (ret)
    102 			goto done;
    103 
    104 		mmu->type[i].type = 0;
    105 		if (args.vram) mmu->type[i].type |= NVIF_MEM_VRAM;
    106 		if (args.host) mmu->type[i].type |= NVIF_MEM_HOST;
    107 		if (args.comp) mmu->type[i].type |= NVIF_MEM_COMP;
    108 		if (args.disp) mmu->type[i].type |= NVIF_MEM_DISP;
    109 		if (args.kind    ) mmu->type[i].type |= NVIF_MEM_KIND;
    110 		if (args.mappable) mmu->type[i].type |= NVIF_MEM_MAPPABLE;
    111 		if (args.coherent) mmu->type[i].type |= NVIF_MEM_COHERENT;
    112 		if (args.uncached) mmu->type[i].type |= NVIF_MEM_UNCACHED;
    113 		mmu->type[i].heap = args.heap;
    114 	}
    115 
    116 	if (mmu->kind_nr) {
    117 		struct nvif_mmu_kind_v0 *kind;
    118 		size_t argc = struct_size(kind, data, mmu->kind_nr);
    119 
    120 		if (ret = -ENOMEM, !(kind = kmalloc(argc, GFP_KERNEL)))
    121 			goto done;
    122 		kind->version = 0;
    123 		kind->count = mmu->kind_nr;
    124 
    125 		ret = nvif_object_mthd(&mmu->object, NVIF_MMU_V0_KIND,
    126 				       kind, argc);
    127 		if (ret == 0)
    128 			memcpy(mmu->kind, kind->data, kind->count);
    129 		mmu->kind_inv = kind->kind_inv;
    130 		kfree(kind);
    131 	}
    132 
    133 done:
    134 	if (ret)
    135 		nvif_mmu_fini(mmu);
    136 	return ret;
    137 }
    138