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1/*2 * Copyright 2013 Red Hat Inc.3 *4 * Permission is hereby granted, free of charge, to any person obtaining a5 * copy of this software and associated documentation files (the "Software"),6 * to deal in the Software without restriction, including without limitation7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,8 * and/or sell copies of the Software, and to permit persons to whom the9 * Software is furnished to do so, subject to the following conditions:10 *11 * The above copyright notice and this permission notice shall be included in12 * all copies or substantial portions of the Software.13 *14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR18 * 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 OR20 * OTHER DEALINGS IN THE SOFTWARE.21 *22 * Authors: Ben Skeggs23 */24#define mcp77_ram(p) container_of((p), struct mcp77_ram, base)25#include "ram.h"26 27struct mcp77_ram {28 struct nvkm_ram base;29 u64 poller_base;30};31 32static int33mcp77_ram_init(struct nvkm_ram *base)34{35 struct mcp77_ram *ram = mcp77_ram(base);36 struct nvkm_device *device = ram->base.fb->subdev.device;37 u32 dniso = ((ram->base.size - (ram->poller_base + 0x00)) >> 5) - 1;38 u32 hostnb = ((ram->base.size - (ram->poller_base + 0x20)) >> 5) - 1;39 u32 flush = ((ram->base.size - (ram->poller_base + 0x40)) >> 5) - 1;40 41 /* Enable NISO poller for various clients and set their associated42 * read address, only for MCP77/78 and MCP79/7A. (fd#27501)43 */44 nvkm_wr32(device, 0x100c18, dniso);45 nvkm_mask(device, 0x100c14, 0x00000000, 0x00000001);46 nvkm_wr32(device, 0x100c1c, hostnb);47 nvkm_mask(device, 0x100c14, 0x00000000, 0x00000002);48 nvkm_wr32(device, 0x100c24, flush);49 nvkm_mask(device, 0x100c14, 0x00000000, 0x00010000);50 return 0;51}52 53static const struct nvkm_ram_func54mcp77_ram_func = {55 .init = mcp77_ram_init,56};57 58int59mcp77_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram)60{61 struct nvkm_device *device = fb->subdev.device;62 u32 rsvd_head = ( 256 * 1024); /* vga memory */63 u32 rsvd_tail = (1024 * 1024) + 0x1000; /* vbios etc + poller mem */64 u64 base = (u64)nvkm_rd32(device, 0x100e10) << 12;65 u64 size = (u64)nvkm_rd32(device, 0x100e14) << 12;66 struct mcp77_ram *ram;67 int ret;68 69 if (!(ram = kzalloc(sizeof(*ram), GFP_KERNEL)))70 return -ENOMEM;71 *pram = &ram->base;72 73 ret = nvkm_ram_ctor(&mcp77_ram_func, fb, NVKM_RAM_TYPE_STOLEN,74 size, &ram->base);75 if (ret)76 return ret;77 78 ram->poller_base = size - rsvd_tail;79 ram->base.stolen = base;80 nvkm_mm_fini(&ram->base.vram);81 82 return nvkm_mm_init(&ram->base.vram, NVKM_RAM_MM_NORMAL,83 rsvd_head >> NVKM_RAM_MM_SHIFT,84 (size - rsvd_head - rsvd_tail) >>85 NVKM_RAM_MM_SHIFT, 1);86}87