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      1 /*	$NetBSD: nouveau_nvkm_subdev_fb_nv30.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright (C) 2010 Francisco Jerez.
      5  * All Rights Reserved.
      6  *
      7  * Permission is hereby granted, free of charge, to any person obtaining
      8  * a copy of this software and associated documentation files (the
      9  * "Software"), to deal in the Software without restriction, including
     10  * without limitation the rights to use, copy, modify, merge, publish,
     11  * distribute, sublicense, and/or sell copies of the Software, and to
     12  * permit persons to whom the Software is furnished to do so, subject to
     13  * the following conditions:
     14  *
     15  * The above copyright notice and this permission notice (including the
     16  * next paragraph) shall be included in all copies or substantial
     17  * portions of the Software.
     18  *
     19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
     20  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     21  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
     22  * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
     23  * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
     24  * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
     25  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     26  *
     27  */
     28 #include <sys/cdefs.h>
     29 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_nv30.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
     30 
     31 #include "priv.h"
     32 #include "ram.h"
     33 
     34 void
     35 nv30_fb_tile_init(struct nvkm_fb *fb, int i, u32 addr, u32 size, u32 pitch,
     36 		  u32 flags, struct nvkm_fb_tile *tile)
     37 {
     38 	/* for performance, select alternate bank offset for zeta */
     39 	if (!(flags & 4)) {
     40 		tile->addr = (0 << 4);
     41 	} else {
     42 		if (fb->func->tile.comp) /* z compression */
     43 			fb->func->tile.comp(fb, i, size, flags, tile);
     44 		tile->addr = (1 << 4);
     45 	}
     46 
     47 	tile->addr |= 0x00000001; /* enable */
     48 	tile->addr |= addr;
     49 	tile->limit = max(1u, addr + size) - 1;
     50 	tile->pitch = pitch;
     51 }
     52 
     53 static void
     54 nv30_fb_tile_comp(struct nvkm_fb *fb, int i, u32 size, u32 flags,
     55 		  struct nvkm_fb_tile *tile)
     56 {
     57 	u32 tiles = DIV_ROUND_UP(size, 0x40);
     58 	u32 tags  = round_up(tiles / fb->ram->parts, 0x40);
     59 	if (!nvkm_mm_head(&fb->tags, 0, 1, tags, tags, 1, &tile->tag)) {
     60 		if (flags & 2) tile->zcomp |= 0x01000000; /* Z16 */
     61 		else           tile->zcomp |= 0x02000000; /* Z24S8 */
     62 		tile->zcomp |= ((tile->tag->offset           ) >> 6);
     63 		tile->zcomp |= ((tile->tag->offset + tags - 1) >> 6) << 12;
     64 #ifdef __BIG_ENDIAN
     65 		tile->zcomp |= 0x10000000;
     66 #endif
     67 	}
     68 }
     69 
     70 static int
     71 calc_bias(struct nvkm_fb *fb, int k, int i, int j)
     72 {
     73 	struct nvkm_device *device = fb->subdev.device;
     74 	int b = (device->chipset > 0x30 ?
     75 		 nvkm_rd32(device, 0x122c + 0x10 * k + 0x4 * j) >>
     76 			(4 * (i ^ 1)) :
     77 		 0) & 0xf;
     78 
     79 	return 2 * (b & 0x8 ? b - 0x10 : b);
     80 }
     81 
     82 static int
     83 calc_ref(struct nvkm_fb *fb, int l, int k, int i)
     84 {
     85 	int j, x = 0;
     86 
     87 	for (j = 0; j < 4; j++) {
     88 		int m = (l >> (8 * i) & 0xff) + calc_bias(fb, k, i, j);
     89 
     90 		x |= (0x80 | clamp(m, 0, 0x1f)) << (8 * j);
     91 	}
     92 
     93 	return x;
     94 }
     95 
     96 void
     97 nv30_fb_init(struct nvkm_fb *fb)
     98 {
     99 	struct nvkm_device *device = fb->subdev.device;
    100 	int i, j;
    101 
    102 	/* Init the memory timing regs at 0x10037c/0x1003ac */
    103 	if (device->chipset == 0x30 ||
    104 	    device->chipset == 0x31 ||
    105 	    device->chipset == 0x35) {
    106 		/* Related to ROP count */
    107 		int n = (device->chipset == 0x31 ? 2 : 4);
    108 		int l = nvkm_rd32(device, 0x1003d0);
    109 
    110 		for (i = 0; i < n; i++) {
    111 			for (j = 0; j < 3; j++)
    112 				nvkm_wr32(device, 0x10037c + 0xc * i + 0x4 * j,
    113 					  calc_ref(fb, l, 0, j));
    114 
    115 			for (j = 0; j < 2; j++)
    116 				nvkm_wr32(device, 0x1003ac + 0x8 * i + 0x4 * j,
    117 					  calc_ref(fb, l, 1, j));
    118 		}
    119 	}
    120 }
    121 
    122 static const struct nvkm_fb_func
    123 nv30_fb = {
    124 	.tags = nv20_fb_tags,
    125 	.init = nv30_fb_init,
    126 	.tile.regions = 8,
    127 	.tile.init = nv30_fb_tile_init,
    128 	.tile.comp = nv30_fb_tile_comp,
    129 	.tile.fini = nv20_fb_tile_fini,
    130 	.tile.prog = nv20_fb_tile_prog,
    131 	.ram_new = nv20_ram_new,
    132 };
    133 
    134 int
    135 nv30_fb_new(struct nvkm_device *device, int index, struct nvkm_fb **pfb)
    136 {
    137 	return nvkm_fb_new_(&nv30_fb, device, index, pfb);
    138 }
    139