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      1 /*	$NetBSD: nouveau_nvkm_engine_sw_nv04.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright 2012 Red Hat Inc.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice shall be included in
     14  * all copies or substantial portions of the Software.
     15  *
     16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
     20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
     21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
     22  * OTHER DEALINGS IN THE SOFTWARE.
     23  *
     24  * Authors: Ben Skeggs
     25  */
     26 #include <sys/cdefs.h>
     27 __KERNEL_RCSID(0, "$NetBSD: nouveau_nvkm_engine_sw_nv04.c,v 1.3 2021/12/18 23:45:37 riastradh Exp $");
     28 
     29 #define nv04_sw_chan(p) container_of((p), struct nv04_sw_chan, base)
     30 #include "priv.h"
     31 #include "chan.h"
     32 #include "nvsw.h"
     33 
     34 #include <nvif/class.h>
     35 #include <nvif/if0004.h>
     36 #include <nvif/ioctl.h>
     37 #include <nvif/unpack.h>
     38 
     39 struct nv04_sw_chan {
     40 	struct nvkm_sw_chan base;
     41 	atomic_t ref;
     42 };
     43 
     44 /*******************************************************************************
     45  * software object classes
     46  ******************************************************************************/
     47 
     48 static int
     49 nv04_nvsw_mthd_get_ref(struct nvkm_nvsw *nvsw, void *data, u32 size)
     50 {
     51 	struct nv04_sw_chan *chan = nv04_sw_chan(nvsw->chan);
     52 	union {
     53 		struct nv04_nvsw_get_ref_v0 v0;
     54 	} *args = data;
     55 	int ret = -ENOSYS;
     56 
     57 	if (!(ret = nvif_unpack(ret, &data, &size, args->v0, 0, 0, false))) {
     58 		args->v0.ref = atomic_read(&chan->ref);
     59 	}
     60 
     61 	return ret;
     62 }
     63 
     64 static int
     65 nv04_nvsw_mthd(struct nvkm_nvsw *nvsw, u32 mthd, void *data, u32 size)
     66 {
     67 	switch (mthd) {
     68 	case NV04_NVSW_GET_REF:
     69 		return nv04_nvsw_mthd_get_ref(nvsw, data, size);
     70 	default:
     71 		break;
     72 	}
     73 	return -EINVAL;
     74 }
     75 
     76 static const struct nvkm_nvsw_func
     77 nv04_nvsw = {
     78 	.mthd = nv04_nvsw_mthd,
     79 };
     80 
     81 static int
     82 nv04_nvsw_new(struct nvkm_sw_chan *chan, const struct nvkm_oclass *oclass,
     83 	      void *data, u32 size, struct nvkm_object **pobject)
     84 {
     85 	return nvkm_nvsw_new_(&nv04_nvsw, chan, oclass, data, size, pobject);
     86 }
     87 
     88 /*******************************************************************************
     89  * software context
     90  ******************************************************************************/
     91 
     92 static bool
     93 nv04_sw_chan_mthd(struct nvkm_sw_chan *base, int subc, u32 mthd, u32 data)
     94 {
     95 	struct nv04_sw_chan *chan = nv04_sw_chan(base);
     96 
     97 	switch (mthd) {
     98 	case 0x0150:
     99 		atomic_set(&chan->ref, data);
    100 		return true;
    101 	default:
    102 		break;
    103 	}
    104 
    105 	return false;
    106 }
    107 
    108 static const struct nvkm_sw_chan_func
    109 nv04_sw_chan = {
    110 	.mthd = nv04_sw_chan_mthd,
    111 };
    112 
    113 static int
    114 nv04_sw_chan_new(struct nvkm_sw *sw, struct nvkm_fifo_chan *fifo,
    115 		 const struct nvkm_oclass *oclass, struct nvkm_object **pobject)
    116 {
    117 	struct nv04_sw_chan *chan;
    118 
    119 	if (!(chan = kzalloc(sizeof(*chan), GFP_KERNEL)))
    120 		return -ENOMEM;
    121 	atomic_set(&chan->ref, 0);
    122 	*pobject = &chan->base.object;
    123 
    124 	return nvkm_sw_chan_ctor(&nv04_sw_chan, sw, fifo, oclass, &chan->base);
    125 }
    126 
    127 /*******************************************************************************
    128  * software engine/subdev functions
    129  ******************************************************************************/
    130 
    131 static const struct nvkm_sw_func
    132 nv04_sw = {
    133 	.chan_new = nv04_sw_chan_new,
    134 	.sclass = {
    135 		{ nv04_nvsw_new, { -1, -1, NVIF_CLASS_SW_NV04 } },
    136 		{}
    137 	}
    138 };
    139 
    140 int
    141 nv04_sw_new(struct nvkm_device *device, int index, struct nvkm_sw **psw)
    142 {
    143 	return nvkm_sw_new_(&nv04_sw, device, index, psw);
    144 }
    145