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      1 /*	$NetBSD: nouveau_nvkm_subdev_ltc_base.c,v 1.3 2021/12/18 23:45:40 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2014 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  * Authors: Ben Skeggs <bskeggs (at) redhat.com>
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_ltc_base.c,v 1.3 2021/12/18 23:45:40 riastradh Exp $");
     28 
     29 #include "priv.h"
     30 
     31 #include <core/memory.h>
     32 
     33 void
     34 nvkm_ltc_tags_clear(struct nvkm_device *device, u32 first, u32 count)
     35 {
     36 	struct nvkm_ltc *ltc = device->ltc;
     37 	const u32 limit = first + count - 1;
     38 
     39 	BUG_ON((first > limit) || (limit >= ltc->num_tags));
     40 
     41 	mutex_lock(&ltc->subdev.mutex);
     42 	ltc->func->cbc_clear(ltc, first, limit);
     43 	ltc->func->cbc_wait(ltc);
     44 	mutex_unlock(&ltc->subdev.mutex);
     45 }
     46 
     47 int
     48 nvkm_ltc_zbc_color_get(struct nvkm_ltc *ltc, int index, const u32 color[4])
     49 {
     50 	memcpy(ltc->zbc_color[index], color, sizeof(ltc->zbc_color[index]));
     51 	ltc->func->zbc_clear_color(ltc, index, color);
     52 	return index;
     53 }
     54 
     55 int
     56 nvkm_ltc_zbc_depth_get(struct nvkm_ltc *ltc, int index, const u32 depth)
     57 {
     58 	ltc->zbc_depth[index] = depth;
     59 	ltc->func->zbc_clear_depth(ltc, index, depth);
     60 	return index;
     61 }
     62 
     63 int
     64 nvkm_ltc_zbc_stencil_get(struct nvkm_ltc *ltc, int index, const u32 stencil)
     65 {
     66 	ltc->zbc_stencil[index] = stencil;
     67 	ltc->func->zbc_clear_stencil(ltc, index, stencil);
     68 	return index;
     69 }
     70 
     71 void
     72 nvkm_ltc_invalidate(struct nvkm_ltc *ltc)
     73 {
     74 	if (ltc->func->invalidate)
     75 		ltc->func->invalidate(ltc);
     76 }
     77 
     78 void
     79 nvkm_ltc_flush(struct nvkm_ltc *ltc)
     80 {
     81 	if (ltc->func->flush)
     82 		ltc->func->flush(ltc);
     83 }
     84 
     85 static void
     86 nvkm_ltc_intr(struct nvkm_subdev *subdev)
     87 {
     88 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
     89 	ltc->func->intr(ltc);
     90 }
     91 
     92 static int
     93 nvkm_ltc_oneinit(struct nvkm_subdev *subdev)
     94 {
     95 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
     96 	return ltc->func->oneinit(ltc);
     97 }
     98 
     99 static int
    100 nvkm_ltc_init(struct nvkm_subdev *subdev)
    101 {
    102 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
    103 	int i;
    104 
    105 	for (i = ltc->zbc_min; i <= ltc->zbc_max; i++) {
    106 		ltc->func->zbc_clear_color(ltc, i, ltc->zbc_color[i]);
    107 		ltc->func->zbc_clear_depth(ltc, i, ltc->zbc_depth[i]);
    108 		if (ltc->func->zbc_clear_stencil)
    109 			ltc->func->zbc_clear_stencil(ltc, i, ltc->zbc_stencil[i]);
    110 	}
    111 
    112 	ltc->func->init(ltc);
    113 	return 0;
    114 }
    115 
    116 static void *
    117 nvkm_ltc_dtor(struct nvkm_subdev *subdev)
    118 {
    119 	struct nvkm_ltc *ltc = nvkm_ltc(subdev);
    120 	nvkm_memory_unref(&ltc->tag_ram);
    121 	return ltc;
    122 }
    123 
    124 static const struct nvkm_subdev_func
    125 nvkm_ltc = {
    126 	.dtor = nvkm_ltc_dtor,
    127 	.oneinit = nvkm_ltc_oneinit,
    128 	.init = nvkm_ltc_init,
    129 	.intr = nvkm_ltc_intr,
    130 };
    131 
    132 int
    133 nvkm_ltc_new_(const struct nvkm_ltc_func *func, struct nvkm_device *device,
    134 	      int index, struct nvkm_ltc **pltc)
    135 {
    136 	struct nvkm_ltc *ltc;
    137 
    138 	if (!(ltc = *pltc = kzalloc(sizeof(*ltc), GFP_KERNEL)))
    139 		return -ENOMEM;
    140 
    141 	nvkm_subdev_ctor(&nvkm_ltc, device, index, &ltc->subdev);
    142 	ltc->func = func;
    143 	ltc->zbc_min = 1; /* reserve 0 for disabled */
    144 	ltc->zbc_max = min(func->zbc, NVKM_LTC_MAX_ZBC_CNT) - 1;
    145 	return 0;
    146 }
    147