1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
|
/*
* ----------------------------------------------------------------------------
* "THE BEER-WARE LICENSE" (Revision 42):
* <phk@FreeBSD.org> wrote this file. As long as you retain this notice you
* can do whatever you want with this stuff. If we meet some day, and you think
* this stuff is worth it, you can buy me a beer in return. Poul-Henning Kamp
* ----------------------------------------------------------------------------
*
* A very simple device driver for PCI cards based on Xilinx 6200 series
* FPGA/RPU devices. Current Functionality is to allow you to open and
* mmap the entire thing into your program.
*
* Hardware currently supported:
* www.vcc.com HotWorks 1 6216 based card.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/module.h>
#include <sys/timetc.h>
#include <sys/timepps.h>
#include <sys/xrpuio.h>
#include <sys/bus.h>
#include <machine/bus.h>
#include <sys/rman.h>
#include <machine/resource.h>
#include <dev/pci/pcireg.h>
#include <dev/pci/pcivar.h>
#include "pci_if.h"
/*
* Device driver initialization stuff
*/
static d_open_t xrpu_open;
static d_close_t xrpu_close;
static d_ioctl_t xrpu_ioctl;
static d_mmap_t xrpu_mmap;
static struct cdevsw xrpu_cdevsw = {
.d_version = D_VERSION,
.d_flags = D_NEEDGIANT,
.d_open = xrpu_open,
.d_close = xrpu_close,
.d_ioctl = xrpu_ioctl,
.d_mmap = xrpu_mmap,
.d_name = "xrpu",
};
static MALLOC_DEFINE(M_XRPU, "xrpu", "XRPU related");
static devclass_t xrpu_devclass;
#define dev2unit(devt) (minor(devt) & 0xff)
#define dev2pps(devt) ((minor(devt) >> 16)-1)
struct softc {
enum { NORMAL, TIMECOUNTER } mode;
vm_offset_t virbase, physbase;
u_int *virbase62;
struct timecounter tc;
u_int *trigger, *latch, dummy;
struct pps_state pps[XRPU_MAX_PPS];
u_int *assert[XRPU_MAX_PPS], *clear[XRPU_MAX_PPS];
};
static unsigned
xrpu_get_timecount(struct timecounter *tc)
{
struct softc *sc = tc->tc_priv;
sc->dummy += *sc->trigger;
return (*sc->latch & tc->tc_counter_mask);
}
static void
xrpu_poll_pps(struct timecounter *tc)
{
struct softc *sc = tc->tc_priv;
int i, j;
unsigned count1, ppscount;
for (i = 0; i < XRPU_MAX_PPS; i++) {
if (sc->assert[i]) {
pps_capture(&sc->pps[i]);
ppscount = *(sc->assert[i]) & tc->tc_counter_mask;
j = 0;
do {
count1 = ppscount;
ppscount = *(sc->assert[i]) & tc->tc_counter_mask;
} while (ppscount != count1 && ++j < 5);
sc->pps[i].capcount = ppscount;
pps_event(&sc->pps[i], PPS_CAPTUREASSERT);
}
if (sc->clear[i]) {
pps_capture(&sc->pps[i]);
j = 0;
ppscount = *(sc->clear[i]) & tc->tc_counter_mask;
do {
count1 = ppscount;
ppscount = *(sc->clear[i]) & tc->tc_counter_mask;
} while (ppscount != count1 && ++j < 5);
sc->pps[i].capcount = ppscount;
pps_event(&sc->pps[i], PPS_CAPTURECLEAR);
}
}
}
static int
xrpu_open(struct cdev *dev, int flag, int mode, struct thread *td)
{
struct softc *sc = devclass_get_softc(xrpu_devclass, dev2unit(dev));
if (!sc)
return (ENXIO);
dev->si_drv1 = sc;
return (0);
}
static int
xrpu_close(struct cdev *dev, int flag, int mode, struct thread *td)
{
return (0);
}
static int
xrpu_mmap(struct cdev *dev, vm_offset_t offset, vm_paddr_t *paddr, int nprot)
{
struct softc *sc = dev->si_drv1;
if (offset >= 0x1000000)
return (-1);
*paddr = sc->physbase + offset;
return (0);
}
static int
xrpu_ioctl(struct cdev *dev, u_long cmd, caddr_t arg, int flag, struct thread *tdr)
{
struct softc *sc = dev->si_drv1;
int i, error;
if (sc->mode == TIMECOUNTER) {
i = dev2pps(dev);
if (i < 0 || i >= XRPU_MAX_PPS)
return ENODEV;
error = pps_ioctl(cmd, arg, &sc->pps[i]);
return (error);
}
if (cmd == XRPU_IOC_TIMECOUNTING) {
struct xrpu_timecounting *xt = (struct xrpu_timecounting *)arg;
/* Name SHALL be zero terminated */
xt->xt_name[sizeof xt->xt_name - 1] = '\0';
i = strlen(xt->xt_name);
sc->tc.tc_name = (char *)malloc(i + 1, M_XRPU, M_WAITOK);
strcpy(sc->tc.tc_name, xt->xt_name);
sc->tc.tc_frequency = xt->xt_frequency;
sc->tc.tc_get_timecount = xrpu_get_timecount;
sc->tc.tc_poll_pps = xrpu_poll_pps;
sc->tc.tc_priv = sc;
sc->tc.tc_counter_mask = xt->xt_mask;
sc->trigger = sc->virbase62 + xt->xt_addr_trigger;
sc->latch = sc->virbase62 + xt->xt_addr_latch;
for (i = 0; i < XRPU_MAX_PPS; i++) {
if (xt->xt_pps[i].xt_addr_assert == 0
&& xt->xt_pps[i].xt_addr_clear == 0)
continue;
make_dev(&xrpu_cdevsw, (i+1)<<16,
UID_ROOT, GID_WHEEL, 0600, "xpps%d", i);
sc->pps[i].ppscap = 0;
if (xt->xt_pps[i].xt_addr_assert) {
sc->assert[i] = sc->virbase62 + xt->xt_pps[i].xt_addr_assert;
sc->pps[i].ppscap |= PPS_CAPTUREASSERT;
}
if (xt->xt_pps[i].xt_addr_clear) {
sc->clear[i] = sc->virbase62 + xt->xt_pps[i].xt_addr_clear;
sc->pps[i].ppscap |= PPS_CAPTURECLEAR;
}
pps_init(&sc->pps[i]);
}
sc->mode = TIMECOUNTER;
tc_init(&sc->tc);
return (0);
}
error = ENOTTY;
return (error);
}
/*
* PCI initialization stuff
*/
static int
xrpu_probe(device_t self)
{
char *desc;
desc = NULL;
switch (pci_get_devid(self)) {
case 0x6216133e:
desc = "VCC Hotworks-I xc6216";
break;
}
if (desc == NULL)
return ENXIO;
device_set_desc(self, desc);
return 0;
}
static int
xrpu_attach(device_t self)
{
struct softc *sc;
struct resource *res;
int rid, unit;
unit = device_get_unit(self);
sc = device_get_softc(self);
sc->mode = NORMAL;
rid = PCIR_BAR(0);
res = bus_alloc_resource_any(self, SYS_RES_MEMORY, &rid, RF_ACTIVE);
if (res == NULL) {
device_printf(self, "Could not map memory\n");
return ENXIO;
}
sc->virbase = (vm_offset_t)rman_get_virtual(res);
sc->physbase = rman_get_start(res);
sc->virbase62 = (u_int *)(sc->virbase + 0x800000);
if (bootverbose)
printf("Mapped physbase %#lx to virbase %#lx\n",
(u_long)sc->physbase, (u_long)sc->virbase);
make_dev(&xrpu_cdevsw, 0, UID_ROOT, GID_WHEEL, 0600, "xrpu%d", unit);
return 0;
}
static device_method_t xrpu_methods[] = {
/* Device interface */
DEVMETHOD(device_probe, xrpu_probe),
DEVMETHOD(device_attach, xrpu_attach),
DEVMETHOD(device_suspend, bus_generic_suspend),
DEVMETHOD(device_resume, bus_generic_resume),
DEVMETHOD(device_shutdown, bus_generic_shutdown),
{0, 0}
};
static driver_t xrpu_driver = {
"xrpu",
xrpu_methods,
sizeof(struct softc)
};
DRIVER_MODULE(xrpu, pci, xrpu_driver, xrpu_devclass, 0, 0);
MODULE_DEPEND(xrpu, pci, 1, 1, 1);
|
