1 /* 2 * Copyright 2014 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 * Authors: Ben Skeggs <bskeggs@redhat.com> 23 */ 24 #include "priv.h" 25 26 #include <subdev/fb.h> 27 28 int 29 nvkm_ltc_tags_alloc(struct nvkm_ltc *ltc, u32 n, struct nvkm_mm_node **pnode) 30 { 31 int ret = nvkm_mm_head(<c->tags, 0, 1, n, n, 1, pnode); 32 if (ret) 33 *pnode = NULL; 34 return ret; 35 } 36 37 void 38 nvkm_ltc_tags_free(struct nvkm_ltc *ltc, struct nvkm_mm_node **pnode) 39 { 40 nvkm_mm_free(<c->tags, pnode); 41 } 42 43 void 44 nvkm_ltc_tags_clear(struct nvkm_ltc *ltc, u32 first, u32 count) 45 { 46 const u32 limit = first + count - 1; 47 48 BUG_ON((first > limit) || (limit >= ltc->num_tags)); 49 50 ltc->func->cbc_clear(ltc, first, limit); 51 ltc->func->cbc_wait(ltc); 52 } 53 54 int 55 nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4]) 56 { 57 memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index])); 58 ltc->func->zbc_clear_color(ltc, index, color); 59 return index; 60 } 61 62 int 63 nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth) 64 { 65 ltc->zbc_depth[index] = depth; 66 ltc->func->zbc_clear_depth(ltc, index, depth); 67 return index; 68 } 69 70 static void 71 nvkm_ltc_intr(struct nvkm_subdev *subdev) 72 { 73 struct nvkm_ltc *ltc = nvkm_ltc(subdev); 74 ltc->func->intr(ltc); 75 } 76 77 static int 78 nvkm_ltc_oneinit(struct nvkm_subdev *subdev) 79 { 80 struct nvkm_ltc *ltc = nvkm_ltc(subdev); 81 return ltc->func->oneinit(ltc); 82 } 83 84 static int 85 nvkm_ltc_init(struct nvkm_subdev *subdev) 86 { 87 struct nvkm_ltc *ltc = nvkm_ltc(subdev); 88 int i; 89 90 for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) { 91 ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]); 92 ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]); 93 } 94 95 ltc->func->init(ltc); 96 return 0; 97 } 98 99 static void * 100 nvkm_ltc_dtor(struct nvkm_subdev *subdev) 101 { 102 struct nvkm_ltc *ltc = nvkm_ltc(subdev); 103 struct nvkm_ram *ram = ltc->subdev.device->fb->ram; 104 nvkm_mm_fini(<c->tags); 105 if (ram) 106 nvkm_mm_free(&ram->vram, <c->tag_ram); 107 return ltc; 108 } 109 110 static const struct nvkm_subdev_func 111 nvkm_ltc = { 112 .dtor = nvkm_ltc_dtor, 113 .oneinit = nvkm_ltc_oneinit, 114 .init = nvkm_ltc_init, 115 .intr = nvkm_ltc_intr, 116 }; 117 118 int 119 nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device, 120 int index, struct nvkm_ltc **pltc) 121 { 122 struct nvkm_ltc *ltc; 123 124 if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL))) 125 return -ENOMEM; 126 127 nvkm_subdev_ctor(&nvkm_ltc, device, index, 0, <c->subdev); 128 ltc->func = func; 129 ltc->zbc_min = 1; /* reserve 0 for disabled */ 130 ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1; 131 return 0; 132 } 133