nouveau/nvif/fifo.c

0001 /*
0002  * Copyright 2018 Red Hat Inc.
0003  *
0004  * Permission is hereby granted, free of charge, to any person obtaining a
0005  * copy of this software and associated documentation files (the "Software"),
0006  * to deal in the Software without restriction, including without limitation
0007  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
0008  * and/or sell copies of the Software, and to permit persons to whom the
0009  * Software is furnished to do so, subject to the following conditions:
0010  *
0011  * The above copyright notice and this permission notice shall be included in
0012  * all copies or substantial portions of the Software.
0013  *
0014  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
0015  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
0016  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
0017  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
0018  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
0019  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
0020  * OTHER DEALINGS IN THE SOFTWARE.
0021  */
0022 #include <nvif/fifo.h>
0023
0024 static int
0025 nvif_fifo_runlists(struct nvif_device *device)
0026 {
0027     struct nvif_object *object = &device->object;
0028     struct {
0029         struct nv_device_info_v1 m;
0030         struct {
0031             struct nv_device_info_v1_data runlists;
0032             struct nv_device_info_v1_data runlist[64];
0033         } v;
0034     } *a;
0035     int ret, i;
0036
0037     if (device->runlist)
0038         return 0;
0039
0040     if (!(a = kmalloc(sizeof(*a), GFP_KERNEL)))
0041         return -ENOMEM;
0042     a->m.version = 1;
0043     a->m.count = sizeof(a->v) / sizeof(a->v.runlists);
0044     a->v.runlists.mthd = NV_DEVICE_HOST_RUNLISTS;
0045     for (i = 0; i < ARRAY_SIZE(a->v.runlist); i++) {
0046         a->v.runlist[i].mthd = NV_DEVICE_HOST_RUNLIST_ENGINES;
0047         a->v.runlist[i].data = i;
0048     }
0049
0050     ret = nvif_object_mthd(object, NV_DEVICE_V0_INFO, a, sizeof(*a));
0051     if (ret)
0052         goto done;
0053
0054     device->runlists = fls64(a->v.runlists.data);
0055     device->runlist = kcalloc(device->runlists, sizeof(*device->runlist),
0056                   GFP_KERNEL);
0057     if (!device->runlist) {
0058         ret = -ENOMEM;
0059         goto done;
0060     }
0061
0062     for (i = 0; i < device->runlists; i++) {
0063         if (a->v.runlist[i].mthd != NV_DEVICE_INFO_INVALID)
0064             device->runlist[i].engines = a->v.runlist[i].data;
0065     }
0066
0067 done:
0068     kfree(a);
0069     return ret;
0070 }
0071
0072 u64
0073 nvif_fifo_runlist(struct nvif_device *device, u64 engine)
0074 {
0075     u64 runm = 0;
0076     int ret, i;
0077
0078     if ((ret = nvif_fifo_runlists(device)))
0079         return runm;
0080
0081     for (i = 0; i < device->runlists; i++) {
0082         if (device->runlist[i].engines & engine)
0083             runm |= BIT_ULL(i);
0084     }
0085
0086     return runm;
0087 }