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      1 /*	$NetBSD: nouveau_nvkm_subdev_fb_ramnv04.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2013 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
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_subdev_fb_ramnv04.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $");
     28 
     29 #include "ram.h"
     30 #include "regsnv04.h"
     31 
     32 const struct nvkm_ram_func
     33 nv04_ram_func = {
     34 };
     35 
     36 int
     37 nv04_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)
     38 {
     39 	struct nvkm_device *device = fb->subdev.device;
     40 	u32 boot0 = nvkm_rd32(device, NV04_PFB_BOOT_0);
     41 	u64 size;
     42 	enum nvkm_ram_type type;
     43 
     44 	if (boot0 & 0x00000100) {
     45 		size  = ((boot0 >> 12) & 0xf) * 2 + 2;
     46 		size *= 1024 * 1024;
     47 	} else {
     48 		switch (boot0 & NV04_PFB_BOOT_0_RAM_AMOUNT) {
     49 		case NV04_PFB_BOOT_0_RAM_AMOUNT_32MB:
     50 			size = 32 * 1024 * 1024;
     51 			break;
     52 		case NV04_PFB_BOOT_0_RAM_AMOUNT_16MB:
     53 			size = 16 * 1024 * 1024;
     54 			break;
     55 		case NV04_PFB_BOOT_0_RAM_AMOUNT_8MB:
     56 			size = 8 * 1024 * 1024;
     57 			break;
     58 		case NV04_PFB_BOOT_0_RAM_AMOUNT_4MB:
     59 			size = 4 * 1024 * 1024;
     60 			break;
     61 		}
     62 	}
     63 
     64 	if ((boot0 & 0x00000038) <= 0x10)
     65 		type = NVKM_RAM_TYPE_SGRAM;
     66 	else
     67 		type = NVKM_RAM_TYPE_SDRAM;
     68 
     69 	return nvkm_ram_new_(&nv04_ram_func, fb, type, size, pram);
     70 }
     71