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      1 /*	$NetBSD: nouveau_nvif_mem.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_mem.c,v 1.2 2021/12/18 23:45:33 riastradh Exp $");
     26 
     27 #include <nvif/mem.h>
     28 #include <nvif/client.h>
     29 
     30 #include <nvif/if000a.h>
     31 
     32 int
     33 nvif_mem_init_map(struct nvif_mmu *mmu, u8 type, u64 size, struct nvif_mem *mem)
     34 {
     35 	int ret = nvif_mem_init(mmu, mmu->mem, NVIF_MEM_MAPPABLE | type, 0,
     36 				size, NULL, 0, mem);
     37 	if (ret == 0) {
     38 		ret = nvif_object_map(&mem->object, NULL, 0);
     39 		if (ret)
     40 			nvif_mem_fini(mem);
     41 	}
     42 	return ret;
     43 }
     44 
     45 void
     46 nvif_mem_fini(struct nvif_mem *mem)
     47 {
     48 	nvif_object_fini(&mem->object);
     49 }
     50 
     51 int
     52 nvif_mem_init_type(struct nvif_mmu *mmu, s32 oclass, int type, u8 page,
     53 		   u64 size, void *argv, u32 argc, struct nvif_mem *mem)
     54 {
     55 	struct nvif_mem_v0 *args;
     56 	u8 stack[128];
     57 	int ret;
     58 
     59 	mem->object.client = NULL;
     60 	if (type < 0)
     61 		return -EINVAL;
     62 
     63 	if (sizeof(*args) + argc > sizeof(stack)) {
     64 		if (!(args = kmalloc(sizeof(*args) + argc, GFP_KERNEL)))
     65 			return -ENOMEM;
     66 	} else {
     67 		args = (void *)stack;
     68 	}
     69 	args->version = 0;
     70 	args->type = type;
     71 	args->page = page;
     72 	args->size = size;
     73 	memcpy(args->data, argv, argc);
     74 
     75 	ret = nvif_object_init(&mmu->object, 0, oclass, args,
     76 			       sizeof(*args) + argc, &mem->object);
     77 	if (ret == 0) {
     78 		mem->type = mmu->type[type].type;
     79 		mem->page = args->page;
     80 		mem->addr = args->addr;
     81 		mem->size = args->size;
     82 	}
     83 
     84 	if (args != (void *)stack)
     85 		kfree(args);
     86 	return ret;
     87 
     88 }
     89 
     90 int
     91 nvif_mem_init(struct nvif_mmu *mmu, s32 oclass, u8 type, u8 page,
     92 	      u64 size, void *argv, u32 argc, struct nvif_mem *mem)
     93 {
     94 	int ret = -EINVAL, i;
     95 
     96 	mem->object.client = NULL;
     97 
     98 	for (i = 0; ret && i < mmu->type_nr; i++) {
     99 		if ((mmu->type[i].type & type) == type) {
    100 			ret = nvif_mem_init_type(mmu, oclass, i, page, size,
    101 						 argv, argc, mem);
    102 		}
    103 	}
    104 
    105 	return ret;
    106 }
    107