xfnw/plan9fox
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

usbuhci: remove resetlk, simplify scanpci()

Browse source
This commit is contained in:
cinap_lenrek 2021-01-17 11:53:50 +01:00
parent 87b1d454ed
commit 3240008dd1
1 changed files with 28 additions and 39 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

67
sys/src/9/pc/usbuhci.c
View file

@ -144,6 +144,7 @@ struct Ctlr
Lock; /* for ilock. qh lists and basic ctlr I/O */
QLock portlck; /* for port resets/enable... */
Pcidev* pcidev;
Ctlr *next;
int active;
int port; /* I/O address */
Qh* qhs; /* list of Qhs for this controller */
@ -289,8 +290,6 @@ struct Td
#define dqprint if(debug || (qh->io && qh->io->debug))print
#define ddqprint if(debug>1 || (qh->io && qh->io->debug>1))print
static Ctlr* ctlrs[Nhcis];
static Tdpool tdpool;
static Qhpool qhpool;
static int debug;
@ -533,19 +532,8 @@ xdump(Ctlr *ctlr, int doilock)
Qh *qh;
int i;
if(doilock){
if(ctlr == ctlrs[0]){
lock(&tdpool);
print("tds: alloc %d = inuse %d + free %d\n",
tdpool.nalloc, tdpool.ninuse, tdpool.nfree);
unlock(&tdpool);
lock(&qhpool);
print("qhs: alloc %d = inuse %d + free %d\n",
qhpool.nalloc, qhpool.ninuse, qhpool.nfree);
unlock(&qhpool);
}
if(doilock)
ilock(ctlr);
}
print("uhci port %#x frames %#p nintr %d ntdintr %d",
ctlr->port, ctlr->frames, ctlr->nintr, ctlr->ntdintr);
print(" nqhintr %d nisointr %d\n", ctlr->nqhintr, ctlr->nisointr);
@ -564,8 +552,19 @@ xdump(Ctlr *ctlr, int doilock)
}
}
print("\n");
if(doilock)
if(doilock){
iunlock(ctlr);
if(ctlr->next == nil){
lock(&tdpool);
print("tds: alloc %d = inuse %d + free %d\n",
tdpool.nalloc, tdpool.ninuse, tdpool.nfree);
unlock(&tdpool);
lock(&qhpool);
print("qhs: alloc %d = inuse %d + free %d\n",
qhpool.nalloc, qhpool.ninuse, qhpool.nfree);
unlock(&qhpool);
}
}
}
static void
@ -2109,18 +2108,18 @@ portstatus(Hci *hp, int port)
return r;
}
static void
static Ctlr*
scanpci(void)
{
static int already = 0;
int io;
int i;
static Ctlr *first, **lastp;
Ctlr *ctlr;
Pcidev *p;
int io;
if(lastp != nil)
return first;
lastp = &first;
if(already)
return;
already = 1;
p = nil;
while(p = pcimatch(p, 0, 0)){
/*
@ -2158,14 +2157,11 @@ scanpci(void)
}
ctlr->pcidev = p;
ctlr->port = io;
for(i = 0; i < Nhcis; i++)
if(ctlrs[i] == nil){
ctlrs[i] = ctlr;
break;
}
if(i == Nhcis)
print("usbuhci: bug: no more controllers\n");
*lastp = ctlr;
lastp = &ctlr->next;
}
return first;
}
static void
@ -2293,32 +2289,24 @@ shutdown(Hci *hp)
static int
reset(Hci *hp)
{
static Lock resetlck;
int i;
Ctlr *ctlr;
Pcidev *p;
if(getconf("*nousbuhci"))
return -1;
ilock(&resetlck);
scanpci();
/*
* Any adapter matches if no hp->port is supplied,
* otherwise the ports must match.
*/
ctlr = nil;
for(i = 0; i < Nhcis && ctlrs[i] != nil; i++){
ctlr = ctlrs[i];
for(ctlr = scanpci(); ctlr != nil; ctlr = ctlr->next){
if(ctlr->active == 0)
if(hp->port == 0 || hp->port == ctlr->port){
ctlr->active = 1;
break;
}
}
iunlock(&resetlck);
if(ctlrs[i] == nil || i == Nhcis)
if(ctlr == nil)
return -1;
p = ctlr->pcidev;
@ -2352,6 +2340,7 @@ reset(Hci *hp)
hp->shutdown = shutdown;
hp->debug = setdebug;
hp->type = "uhci";
intrenable(hp->irq, hp->interrupt, hp, hp->tbdf, hp->type);
return 0;