nv04.c

  1/*
  2 * Copyright 2012 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#define nv04_sw_chan(p) container_of((p), struct nv04_sw_chan, base)
 25#include "priv.h"
 26#include "chan.h"
 27#include "nvsw.h"
 28
 29#include <nvif/class.h>
 30#include <nvif/if0004.h>
 31#include <nvif/ioctl.h>
 32#include <nvif/unpack.h>
 33
 34struct nv04_sw_chan {
 35	struct nvkm_sw_chan base;
 36	atomic_t ref;
 37};
 38
 39/*******************************************************************************
 40 * software object classes
 41 ******************************************************************************/
 42
 43static int
 44nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
 45{
 46	struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
 47	union {
 48		struct nv04_nvsw_get_ref_v0 v0;
 49	} *args = data;
 50	int ret = -ENOSYS;
 51
 52	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
 53		args->v0.ref = atomic_read(&chan->ref);
 54	}
 55
 56	return ret;
 57}
 58
 59static int
 60nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
 61{
 62	switch (mthd) {
 63	case NV04_NVSW_GET_REF:
 64		return nv04_nvsw_mthd_get_ref(nvsw, data, size);
 65	default:
 66		break;
 67	}
 68	return -EINVAL;
 69}
 70
 71static const struct nvkm_nvsw_func
 72nv04_nvsw = {
 73	.mthd = nv04_nvsw_mthd,
 74};
 75
 76static int
 77nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
 78	      void *data, u32 size, struct nvkm_object **pobject)
 79{
 80	return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
 81}
 82
 83/*******************************************************************************
 84 * software context
 85 ******************************************************************************/
 86
 87static bool
 88nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
 89{
 90	struct nv04_sw_chan *chan = nv04_sw_chan(base);
 91
 92	switch (mthd) {
 93	case 0x0150:
 94		atomic_set(&chan->ref, data);
 95		return true;
 96	default:
 97		break;
 98	}
 99
100	return false;
101}
102
103static const struct nvkm_sw_chan_func
104nv04_sw_chan = {
105	.mthd = nv04_sw_chan_mthd,
106};
107
108static int
109nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_chan *fifo,
110		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
111{
112	struct nv04_sw_chan *chan;
113
114	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
115		return -ENOMEM;
116	atomic_set(&chan->ref, 0);
117	*pobject = &chan->base.object;
118
119	return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
120}
121
122/*******************************************************************************
123 * software engine/subdev functions
124 ******************************************************************************/
125
126static const struct nvkm_sw_func
127nv04_sw = {
128	.chan_new = nv04_sw_chan_new,
129	.sclass = {
130		{ nv04_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV04 } },
131		{}
132	}
133};
134
135int
136nv04_sw_new(struct nvkm_device *device, enum nvkm_subdev_type type, int inst, struct nvkm_sw **psw)
137{
138	return nvkm_sw_new_(&nv04_sw, device, type, inst, psw);
139}