1 /* 2 * Copyright 2018 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 #include <nvif/fifo.h> 23 24 static int 25 nvif_fifo_runlists(struct nvif_device *device) 26 { 27 struct nvif_object *object = &device->object; 28 TRAILING_OVERLAP(struct nv_device_info_v1, m, data, 29 struct { 30 struct nv_device_info_v1_data runlists; 31 struct nv_device_info_v1_data runlist[64]; 32 } v; 33 ) *a; 34 int ret, i; 35 36 if (device->runlist) 37 return 0; 38 39 if (!(a = kmalloc(sizeof(*a), GFP_KERNEL))) 40 return -ENOMEM; 41 a->m.version = 1; 42 a->m.count = sizeof(a->v) / sizeof(a->v.runlists); 43 a->v.runlists.mthd = NV_DEVICE_HOST_RUNLISTS; 44 for (i = 0; i < ARRAY_SIZE(a->v.runlist); i++) { 45 a->v.runlist[i].mthd = NV_DEVICE_HOST_RUNLIST_ENGINES; 46 a->v.runlist[i].data = i; 47 } 48 49 ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, a, sizeof(*a)); 50 if (ret) 51 goto done; 52 53 device->runlists = fls64(a->v.runlists.data); 54 device->runlist = kcalloc(device->runlists, sizeof(*device->runlist), 55 GFP_KERNEL); 56 if (!device->runlist) { 57 ret = -ENOMEM; 58 goto done; 59 } 60 61 for (i = 0; i < device->runlists; i++) { 62 if (a->v.runlist[i].mthd != NV_DEVICE_INFO_INVALID) 63 device->runlist[i].engines = a->v.runlist[i].data; 64 } 65 66 done: 67 kfree(a); 68 return ret; 69 } 70 71 u64 72 nvif_fifo_runlist(struct nvif_device *device, u64 engine) 73 { 74 u64 runm = 0; 75 int ret, i; 76 77 if ((ret = nvif_fifo_runlists(device))) 78 return runm; 79 80 for (i = 0; i < device->runlists; i++) { 81 if (device->runlist[i].engines & engine) 82 runm |= BIT_ULL(i); 83 } 84 85 return runm; 86 } 87