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minix/drivers/pci/main.c
Philip Homburg f9ccfca2a1 (Incomplete) support for access control in PCI (pci_set_acl). 
-script argument to service for crash recovery scripts
-config argument to service for driver resource configuration
restart command in service to restart a driver after a crash (for use in
crash recovery scripts).
down and refresh now take labels instead of pids.
verious changes in rs to make this work.
2006-10-20 15:01:32 +00:00

614 lines
11 KiB
C
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/*
main.c
*/
#include "../drivers.h"
#include <ibm/pci.h>
#include <minix/rs.h>
#include "pci.h"
#define NR_DRIVERS 16
PRIVATE struct name
{
char name[M3_STRING];
int tasknr;
} names[NR_DRIVERS];
PRIVATE struct acl
{
int inuse;
struct rs_pci acl;
} acl[NR_DRIVERS];
FORWARD _PROTOTYPE( void do_init, (message *mp) );
FORWARD _PROTOTYPE( void do_sig_handler, (void) );
FORWARD _PROTOTYPE( void do_first_dev, (message *mp) );
FORWARD _PROTOTYPE( void do_next_dev, (message *mp) );
FORWARD _PROTOTYPE( void do_find_dev, (message *mp) );
FORWARD _PROTOTYPE( void do_ids, (message *mp) );
FORWARD _PROTOTYPE( void do_dev_name, (message *mp) );
FORWARD _PROTOTYPE( void do_dev_name_s, (message *mp) );
FORWARD _PROTOTYPE( void do_slot_name, (message *mp) );
FORWARD _PROTOTYPE( void do_slot_name_s, (message *mp) );
FORWARD _PROTOTYPE( void do_acl, (message *mp) );
FORWARD _PROTOTYPE( void do_reserve, (message *mp) );
FORWARD _PROTOTYPE( void do_attr_r8, (message *mp) );
FORWARD _PROTOTYPE( void do_attr_r16, (message *mp) );
FORWARD _PROTOTYPE( void do_attr_r32, (message *mp) );
FORWARD _PROTOTYPE( void do_attr_w8, (message *mp) );
FORWARD _PROTOTYPE( void do_attr_w16, (message *mp) );
FORWARD _PROTOTYPE( void do_attr_w32, (message *mp) );
FORWARD _PROTOTYPE( void do_rescan_bus, (message *mp) );
FORWARD _PROTOTYPE( void reply, (message *mp, int result) );
FORWARD _PROTOTYPE( struct rs_pci *find_acl, (int endpoint) );
int main(void)
{
int i, r;
message m;
pci_init();
for (i= 0; i<NR_DRIVERS; i++)
names[i].tasknr= ANY;
for(;;)
{
r= receive(ANY, &m);
if (r < 0)
{
printf("PCI: receive from ANY failed: %d\n", r);
break;
}
switch(m.m_type)
{
case BUSC_PCI_INIT: do_init(&m); break;
case BUSC_PCI_FIRST_DEV: do_first_dev(&m); break;
case BUSC_PCI_NEXT_DEV: do_next_dev(&m); break;
case BUSC_PCI_FIND_DEV: do_find_dev(&m); break;
case BUSC_PCI_IDS: do_ids(&m); break;
case BUSC_PCI_DEV_NAME: do_dev_name(&m); break;
case BUSC_PCI_SLOT_NAME: do_slot_name(&m); break;
case BUSC_PCI_RESERVE: do_reserve(&m); break;
case BUSC_PCI_ATTR_R8: do_attr_r8(&m); break;
case BUSC_PCI_ATTR_R16: do_attr_r16(&m); break;
case BUSC_PCI_ATTR_R32: do_attr_r32(&m); break;
case BUSC_PCI_ATTR_W8: do_attr_w8(&m); break;
case BUSC_PCI_ATTR_W16: do_attr_w16(&m); break;
case BUSC_PCI_ATTR_W32: do_attr_w32(&m); break;
case BUSC_PCI_RESCAN: do_rescan_bus(&m); break;
case BUSC_PCI_DEV_NAME_S: do_dev_name_s(&m); break;
case BUSC_PCI_SLOT_NAME_S: do_slot_name_s(&m); break;
case BUSC_PCI_ACL: do_acl(&m); break;
case PROC_EVENT: do_sig_handler(); break;
default:
printf("PCI: got message from %d, type %d\n",
m.m_source, m.m_type);
break;
}
}
return 0;
}
/*===========================================================================*
* do_sig_handler *
*===========================================================================*/
PRIVATE void do_sig_handler()
{
sigset_t sigset;
int sig;
/* Try to obtain signal set from PM. */
if (getsigset(&sigset) != 0) return;
/* Check for known signals. */
if (sigismember(&sigset, SIGTERM)) {
exit(0);
}
}
PRIVATE void do_init(mp)
message *mp;
{
int i, r, empty;
#if DEBUG
printf("pci_init: called by '%s'\n", mp->m3_ca1);
#endif
empty= -1;
for (i= 0; i<NR_DRIVERS; i++)
{
if (empty == -1 && names[i].tasknr == ANY)
empty= i;
if (strcmp(names[i].name, mp->m3_ca1) == 0)
break;
}
if (i >= NR_DRIVERS)
{
if (empty == -1)
panic("pci", "do_init: too many clients", NR_DRIVERS);
i= empty;
strcpy(names[i].name, mp->m3_ca1);
}
else if (names[i].tasknr == mp->m_source)
{
/* Ignore all init calls for a process after the first one */
}
else
pci_release(names[i].name);
names[i].tasknr= mp->m_source;
mp->m_type= 0;
r= send(mp->m_source, mp);
if (r != 0)
printf("do_init: unable to send to %d: %d\n", mp->m_source, r);
}
PRIVATE void do_first_dev(mp)
message *mp;
{
int i, r, devind;
u16_t vid, did;
struct rs_pci *aclp;
aclp= find_acl(mp->m_source);
if (!aclp)
printf("do_first_dev: no acl for caller %d\n", mp->m_source);
r= pci_first_dev_a(aclp, &devind, &vid, &did);
if (r == 1)
{
mp->m1_i1= devind;
mp->m1_i2= vid;
mp->m1_i3= did;
}
mp->m_type= r;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_first_dev: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_next_dev(mp)
message *mp;
{
int r, devind;
u16_t vid, did;
struct rs_pci *aclp;
devind= mp->m1_i1;
aclp= find_acl(mp->m_source);
r= pci_next_dev_a(aclp, &devind, &vid, &did);
if (r == 1)
{
mp->m1_i1= devind;
mp->m1_i2= vid;
mp->m1_i3= did;
}
mp->m_type= r;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_next_dev: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_find_dev(mp)
message *mp;
{
int r, devind;
u8_t bus, dev, func;
bus= mp->m1_i1;
dev= mp->m1_i2;
func= mp->m1_i3;
r= pci_find_dev(bus, dev, func, &devind);
if (r == 1)
mp->m1_i1= devind;
mp->m_type= r;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_find_dev: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_ids(mp)
message *mp;
{
int r, devind;
u16_t vid, did;
devind= mp->m1_i1;
pci_ids(devind, &vid, &did);
mp->m1_i1= vid;
mp->m1_i2= did;
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_ids: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_dev_name(mp)
message *mp;
{
int r, name_len, len;
u16_t vid, did;
char *name_ptr, *name;
vid= mp->m1_i1;
did= mp->m1_i2;
name_len= mp->m1_i3;
name_ptr= mp->m1_p1;
name= pci_dev_name(vid, did);
if (name == NULL)
{
/* No name */
r= ENOENT;
}
else
{
len= strlen(name)+1;
if (len > name_len)
len= name_len;
printf("pci`do_dev_name: calling do_vircopy\n");
r= sys_vircopy(SELF, D, (vir_bytes)name, mp->m_source, D,
(vir_bytes)name_ptr, len);
}
mp->m_type= r;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_dev_name: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_dev_name_s(mp)
message *mp;
{
int r, name_len, len;
u16_t vid, did;
cp_grant_id_t name_gid;
char *name;
vid= mp->m7_i1;
did= mp->m7_i2;
name_len= mp->m7_i3;
name_gid= mp->m7_i4;
name= pci_dev_name(vid, did);
if (name == NULL)
{
/* No name */
r= ENOENT;
}
else
{
len= strlen(name)+1;
if (len > name_len)
len= name_len;
r= sys_safecopyto(mp->m_source, name_gid, 0, (vir_bytes)name,
len, D);
}
mp->m_type= r;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_dev_name: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_slot_name(mp)
message *mp;
{
int r, devind, name_len, len;
char *name_ptr, *name;
devind= mp->m1_i1;
name_len= mp->m1_i2;
name_ptr= mp->m1_p1;
name= pci_slot_name(devind);
len= strlen(name)+1;
if (len > name_len)
len= name_len;
printf("pci`do_slot_name: calling do_vircopy\n");
r= sys_vircopy(SELF, D, (vir_bytes)name, mp->m_source, D,
(vir_bytes)name_ptr, len);
mp->m_type= r;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_slot_name: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_slot_name_s(mp)
message *mp;
{
int r, devind, name_len, len;
cp_grant_id_t gid;
char *name;
devind= mp->m1_i1;
name_len= mp->m1_i2;
gid= mp->m1_i3;
name= pci_slot_name(devind);
len= strlen(name)+1;
if (len > name_len)
len= name_len;
r= sys_safecopyto(mp->m_source, gid, 0, (vir_bytes)name, len, D);
mp->m_type= r;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_slot_name: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_acl(mp)
message *mp;
{
int i, r, gid;
if (mp->m_source != RS_PROC_NR)
{
printf("do_acl: not from RS\n");
reply(mp, EPERM);
return;
}
for (i= 0; i<NR_DRIVERS; i++)
{
if (!acl[i].inuse)
break;
}
if (i >= NR_DRIVERS)
{
printf("do_acl: table is full\n");
reply(mp, ENOMEM);
return;
}
gid= mp->m1_i1;
r= sys_safecopyfrom(mp->m_source, gid, 0, (vir_bytes)&acl[i].acl,
sizeof(acl[i].acl), D);
if (r != OK)
{
printf("do_acl: safecopyfrom failed\n");
reply(mp, r);
return;
}
acl[i].inuse= 1;
printf("do_acl: setting ACL for %d ('%s') at entry %d\n",
acl[i].acl.rsp_endpoint, acl[i].acl.rsp_label,
i);
reply(mp, OK);
}
PRIVATE void do_reserve(mp)
message *mp;
{
int i, r, devind;
/* Find the name of the caller */
for (i= 0; i<NR_DRIVERS; i++)
{
if (names[i].tasknr == mp->m_source)
break;
}
if (i >= NR_DRIVERS)
{
printf("pci`do_reserve: task %d did not call pci_init\n",
mp->m_source);
return;
}
devind= mp->m1_i1;
pci_reserve3(devind, mp->m_source, names[i].name);
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_reserve: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_attr_r8(mp)
message *mp;
{
int r, devind, port;
u8_t v;
devind= mp->m2_i1;
port= mp->m2_i2;
v= pci_attr_r8(devind, port);
mp->m2_l1= v;
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_attr_r8: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_attr_r16(mp)
message *mp;
{
int r, devind, port;
u32_t v;
devind= mp->m2_i1;
port= mp->m2_i2;
v= pci_attr_r16(devind, port);
mp->m2_l1= v;
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_attr_r16: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_attr_r32(mp)
message *mp;
{
int r, devind, port;
u32_t v;
devind= mp->m2_i1;
port= mp->m2_i2;
v= pci_attr_r32(devind, port);
mp->m2_l1= v;
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_attr_r32: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_attr_w8(mp)
message *mp;
{
int r, devind, port;
u8_t v;
devind= mp->m2_i1;
port= mp->m2_i2;
v= mp->m2_l1;
pci_attr_w8(devind, port, v);
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_attr_w8: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_attr_w16(mp)
message *mp;
{
int r, devind, port;
u16_t v;
devind= mp->m2_i1;
port= mp->m2_i2;
v= mp->m2_l1;
pci_attr_w16(devind, port, v);
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_attr_w16: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_attr_w32(mp)
message *mp;
{
int r, devind, port;
u32_t v;
devind= mp->m2_i1;
port= mp->m2_i2;
v= mp->m2_l1;
pci_attr_w32(devind, port, v);
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_attr_w32: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void do_rescan_bus(mp)
message *mp;
{
int r, busnr;
busnr= mp->m2_i1;
pci_rescan_bus(busnr);
mp->m_type= OK;
r= send(mp->m_source, mp);
if (r != 0)
{
printf("do_rescan_bus: unable to send to %d: %d\n",
mp->m_source, r);
}
}
PRIVATE void reply(mp, result)
message *mp;
int result;
{
int r;
message m;
m.m_type= result;
r= send(mp->m_source, &m);
if (r != 0)
printf("reply: unable to send to %d: %d\n", mp->m_source, r);
}
PRIVATE struct rs_pci *find_acl(endpoint)
int endpoint;
{
int i;
/* Find ACL entry for caller */
for (i= 0; i<NR_DRIVERS; i++)
{
if (!acl[i].inuse)
continue;
if (acl[i].acl.rsp_endpoint == endpoint)
return &acl[i].acl;
}
return NULL;
}
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