1/* $NetBSD: nouveau_nvkm_subdev_fb_rammcp77.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_rammcp77.c,v 1.3 2021/12/18 23:45:39 riastradh Exp $"); 28 29#define mcp77_ram(p) container_of((p), struct mcp77_ram, base) 30#include "ram.h" 31 32struct mcp77_ram { 33 struct nvkm_ram base; 34 u64 poller_base; 35}; 36 37static int 38mcp77_ram_init(struct nvkm_ram *base) 39{ 40 struct mcp77_ram *ram = mcp77_ram(base); 41 struct nvkm_device *device = ram->base.fb->subdev.device; 42 u32 dniso = ((ram->base.size - (ram->poller_base + 0x00)) >> 5) - 1; 43 u32 hostnb = ((ram->base.size - (ram->poller_base + 0x20)) >> 5) - 1; 44 u32 flush = ((ram->base.size - (ram->poller_base + 0x40)) >> 5) - 1; 45 46 /* Enable NISO poller for various clients and set their associated 47 * read address, only for MCP77/78 and MCP79/7A. (fd#27501) 48 */ 49 nvkm_wr32(device, 0x100c18, dniso); 50 nvkm_mask(device, 0x100c14, 0x00000000, 0x00000001); 51 nvkm_wr32(device, 0x100c1c, hostnb); 52 nvkm_mask(device, 0x100c14, 0x00000000, 0x00000002); 53 nvkm_wr32(device, 0x100c24, flush); 54 nvkm_mask(device, 0x100c14, 0x00000000, 0x00010000); 55 return 0; 56} 57 58static const struct nvkm_ram_func 59mcp77_ram_func = { 60 .init = mcp77_ram_init, 61}; 62 63int 64mcp77_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram) 65{ 66 struct nvkm_device *device = fb->subdev.device; 67 u32 rsvd_head = ( 256 * 1024); /* vga memory */ 68 u32 rsvd_tail = (1024 * 1024) + 0x1000; /* vbios etc + poller mem */ 69 u64 base = (u64)nvkm_rd32(device, 0x100e10) << 12; 70 u64 size = (u64)nvkm_rd32(device, 0x100e14) << 12; 71 struct mcp77_ram *ram; 72 int ret; 73 74 if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL))) 75 return -ENOMEM; 76 *pram = &ram->base; 77 78 ret = nvkm_ram_ctor(&mcp77_ram_func, fb, NVKM_RAM_TYPE_STOLEN, 79 size, &ram->base); 80 if (ret) 81 return ret; 82 83 ram->poller_base = size - rsvd_tail; 84 ram->base.stolen = base; 85 nvkm_mm_fini(&ram->base.vram); 86 87 return nvkm_mm_init(&ram->base.vram, NVKM_RAM_MM_NORMAL, 88 rsvd_head >> NVKM_RAM_MM_SHIFT, 89 (size - rsvd_head - rsvd_tail) >> 90 NVKM_RAM_MM_SHIFT, 1); 91} 92