2 * The PCI Library -- AIX /dev/pci[0-n] access
4 * Copyright (c) 1999 Jari Kirma <kirma@cs.hut.fi>
6 * Can be freely distributed and used under the terms of the GNU GPL.
10 * Read functionality of this driver is briefly tested, and seems
11 * to supply basic information correctly, but I promise no more.
20 #include <sys/types.h>
25 #define AIX_LSDEV_CMD "/usr/sbin/lsdev -C -c bus -t pci\\* -S available -F name"
26 #define AIX_ODMGET_CMD \
27 "/usr/bin/odmget -q 'name=%s and attribute=bus_number' CuAt | \
28 /usr/bin/awk '$1 == \"value\" { print $3 }'"
31 /* AIX PCI bus device information */
33 typedef struct aix_pci_bus {
39 #define PCI_BUS_MAX 16 /* arbitrary choice */
40 static aix_pci_bus pci_buses[PCI_BUS_MAX];
41 static int pci_bus_count = 0;
44 /* Utility Routines */
47 aix_find_bus(struct pci_access *a, int bus_number)
51 for (i = 0; i < pci_bus_count; i++)
53 if (pci_buses[i].bus_number == bus_number)
59 a->error("aix_find_bus: bus number %d not found", bus_number);
63 aix_bus_open(struct pci_dev *d)
65 struct pci_access *a = d->access;
66 aix_pci_bus *bp = aix_find_bus(a, d->bus);
71 int mode = a->writeable ? O_RDWR : O_RDONLY;
73 snprintf(devbuf, sizeof (devbuf), "/dev/%s", bp->bus_name);
74 bp->bus_fd = open(devbuf, mode, 0);
76 a->error("aix_open_bus: %s open failed", devbuf);
83 aix_bus_number(char *name)
92 snprintf(command, sizeof (command), AIX_ODMGET_CMD, name);
93 odmget_pipe = popen(command, "r");
94 if (odmget_pipe == NULL)
100 if (fgets(buf, sizeof (buf) - 1, odmget_pipe) != NULL)
102 bp = buf + 1; /* skip leading double quote */
103 bus_number = strtol(bp, &ep, 0);
112 /* first PCI bus_number is not recorded in ODM CuAt; default to 0 */
116 (void) pclose(odmget_pipe);
125 aix_detect(struct pci_access *a)
128 int mode = a->writeable ? W_OK : R_OK;
129 char *command = AIX_LSDEV_CMD;
134 lsdev_pipe = popen(command, "r");
135 if (lsdev_pipe == NULL)
137 a->error("aix_config: popen(\"%s\") failed", command);
140 while (fgets(buf, sizeof (buf) - 1, lsdev_pipe) != NULL)
143 while (buf[len-1] == '\n' || buf[len-1] == '\r')
145 buf[len] = '\0'; /* clobber the newline */
147 name = (char *) pci_malloc(a, len + 1);
149 pci_buses[pci_bus_count].bus_name = name;
150 pci_buses[pci_bus_count].bus_number = 0;
151 pci_buses[pci_bus_count].bus_fd = -1;
153 a->debug("...using %s", name);
155 a->debug(", %s", name);
157 if (pci_bus_count >= PCI_BUS_MAX)
161 (void) pclose(lsdev_pipe);
163 return pci_bus_count;
167 aix_init(struct pci_access *a)
172 for (i = 0; i < pci_bus_count; i++)
174 name = pci_buses[i].bus_name;
175 pci_buses[i].bus_number = aix_bus_number(name);
180 aix_cleanup(struct pci_access *a)
184 while (pci_bus_count-- > 0)
186 bp = &pci_buses[pci_bus_count];
187 (void) free(bp->bus_name);
190 (void) close(bp->bus_fd);
197 aix_scan(struct pci_access *a)
203 memset(busmap, 0, sizeof(busmap));
204 for (i = 0; i < pci_bus_count; i++)
206 bus_number = pci_buses[i].bus_number;
207 if (!busmap[bus_number])
209 pci_generic_scan_bus(a, busmap, bus_number);
215 aix_read(struct pci_dev *d, int pos, byte *buf, int len)
220 if (d->domain || pos + len > 256)
223 fd = aix_bus_open(d);
224 mdio.md_addr = (ulong) pos;
226 mdio.md_incr = MV_BYTE;
227 mdio.md_data = (char *) buf;
228 mdio.md_sla = PCI_DEVFN(d->dev, d->func);
230 if (ioctl(fd, MIOPCFGET, &mdio) < 0)
231 d->access->error("aix_read: ioctl(MIOPCFGET) failed");
237 aix_write(struct pci_dev *d, int pos, byte *buf, int len)
242 if (d->domain || pos + len > 256)
245 fd = aix_bus_open(d);
246 mdio.md_addr = (ulong) pos;
248 mdio.md_incr = MV_BYTE;
249 mdio.md_data = (char *) buf;
250 mdio.md_sla = PCI_DEVFN(d->dev, d->func);
252 if (ioctl(fd, MIOPCFPUT, &mdio) < 0)
254 d->access->error("aix_write: ioctl(MIOPCFPUT) failed");
260 struct pci_methods pm_aix_device = {
268 pci_generic_fill_info,
273 NULL /* dev_cleanup */