1 /* 2 * Copyright 2013 Red Hat Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * 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 OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 * Authors: Ben Skeggs 23 */ 24 #include "ram.h" 25 26 int 27 nv1a_ram_new(struct nvkm_fb *fb, struct nvkm_ram **pram) 28 { 29 struct pci_dev *bridge; 30 u32 mem, mib; 31 32 bridge = pci_get_bus_and_slot(0, PCI_DEVFN(0, 1)); 33 if (!bridge) { 34 nvkm_error(&fb->subdev, "no bridge device\n"); 35 return -ENODEV; 36 } 37 38 if (fb->subdev.device->chipset == 0x1a) { 39 pci_read_config_dword(bridge, 0x7c, &mem); 40 mib = ((mem >> 6) & 31) + 1; 41 } else { 42 pci_read_config_dword(bridge, 0x84, &mem); 43 mib = ((mem >> 4) & 127) + 1; 44 } 45 46 return nvkm_ram_new_(&nv04_ram_func, fb, NVKM_RAM_TYPE_STOLEN, 47 mib * 1024 * 1024, 0, pram); 48 } 49