diff options
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/pci/arc.c | 158 |
1 files changed, 154 insertions, 4 deletions
diff --git a/sys/dev/pci/arc.c b/sys/dev/pci/arc.c index 006097319d5..72397160a4b 100644 --- a/sys/dev/pci/arc.c +++ b/sys/dev/pci/arc.c @@ -1,4 +1,4 @@ -/* $OpenBSD: arc.c,v 1.20 2006/08/15 04:26:58 dlg Exp $ */ +/* $OpenBSD: arc.c,v 1.21 2006/08/17 12:16:35 dlg Exp $ */ /* * Copyright (c) 2006 David Gwynne <dlg@openbsd.org> @@ -22,6 +22,8 @@ #include <sys/kernel.h> #include <sys/malloc.h> #include <sys/device.h> +#include <sys/proc.h> +#include <sys/rwlock.h> #include <machine/bus.h> @@ -37,6 +39,7 @@ #ifdef ARC_DEBUG #define ARC_D_INIT (1<<0) #define ARC_D_RW (1<<1) +#define ARC_D_DB (1<<2) int arcdebug = 0; @@ -112,10 +115,9 @@ static const struct pci_matchid arc_devices[] = { #define ARC_REG_MSGBUF_LEN 1024 #define ARC_REG_IOC_WBUF_LEN 0x0e00 #define ARC_REG_IOC_WBUF 0x0e04 -#define ARC_REG_IOC_WBUF_MAXLEN 124 #define ARC_REG_IOC_RBUF_LEN 0x0f00 #define ARC_REG_IOC_RBUF 0x0f04 -#define ARC_REG_IOC_RBUF_MAXLEN 124 +#define ARC_REG_IOC_RWBUF_MAXLEN 124 /* for both RBUF and WBUF */ struct arc_msg_firmware_info { u_int32_t signature; @@ -212,6 +214,9 @@ struct arc_softc { struct arc_dmamem *sc_requests; struct arc_ccb *sc_ccbs; struct arc_ccb_list sc_ccb_free; + + struct rwlock sc_lock; + volatile int sc_talking; }; #define DEVNAME(_s) ((_s)->sc_dev.dv_xname) @@ -295,6 +300,12 @@ int arc_map_pci_resources(struct arc_softc *, struct pci_attach_args *); int arc_query_firmware(struct arc_softc *); +/* these lock access to the read and write regions. */ +void arc_lock(struct arc_softc *); +void arc_unlock(struct arc_softc *); +void arc_wait(struct arc_softc *); +int arc_msgbuf(struct arc_softc *, void *, size_t, + void *, size_t); int arc_match(struct device *parent, void *match, void *aux) @@ -309,6 +320,9 @@ arc_attach(struct device *parent, struct device *self, void *aux) struct arc_softc *sc = (struct arc_softc *)self; struct pci_attach_args *pa = aux; + sc->sc_talking = 0; + rw_init(&sc->sc_lock, "arcmsg"); + if (arc_map_pci_resources(sc, pa) != 0) { /* error message printed by arc_map_pci_resources */ return; @@ -334,7 +348,8 @@ arc_attach(struct device *parent, struct device *self, void *aux) config_found(self, &sc->sc_link, scsiprint); /* XXX enable interrupts */ - arc_write(sc, ARC_REG_INTRMASK, ~ARC_REG_INTRMASK_POSTQUEUE); + arc_write(sc, ARC_REG_INTRMASK, + ~(ARC_REG_INTRMASK_POSTQUEUE|ARC_REG_INTRSTAT_DOORBELL)); return; } @@ -367,6 +382,22 @@ arc_intr(void *arg) return (0); arc_write(sc, ARC_REG_INTRSTAT, intrstat); + if (intrstat & ARC_REG_INTRSTAT_DOORBELL) { + if (sc->sc_talking) { + /* if an ioctl is talking, wake it up */ + arc_write(sc, ARC_REG_INTRMASK, + ~ARC_REG_INTRMASK_POSTQUEUE); + wakeup(sc); + } else { + /* otherwise drop it */ + reg = arc_read(sc, ARC_REG_OUTB_DOORBELL); + arc_write(sc, ARC_REG_OUTB_DOORBELL, reg); + if (reg & ARC_REG_OUTB_DOORBELL_WRITE_OK) + arc_write(sc, ARC_REG_INB_DOORBELL, + ARC_REG_INB_DOORBELL_READ_OK); + } + } + while ((reg = arc_pop(sc)) != 0xffffffff) { cmd = (struct arc_io_cmd *)(kva + ((reg << ARC_REG_REPLY_QUEUE_ADDR_SHIFT) - @@ -709,6 +740,125 @@ arc_query_firmware(struct arc_softc *sc) return (0); } +int +arc_msgbuf(struct arc_softc *sc, void *wptr, size_t wlen, void *rptr, + size_t rlen) +{ + u_int8_t rwbuf[ARC_REG_IOC_RWBUF_MAXLEN]; + u_int8_t *wbuf = wptr, *rbuf = rptr; + int wdone = 0, rdone = 0, i; + u_int32_t reg, rwlen; + + DNPRINTF(ARC_D_DB, "%s: arc_msgbuf wlen: %d rlen: %d\n", DEVNAME(sc), + wlen, rlen); + + if (arc_read(sc, ARC_REG_OUTB_DOORBELL) != 0) + return (EBUSY); + + reg = ARC_REG_OUTB_DOORBELL_READ_OK; + + do { + if ((reg & ARC_REG_OUTB_DOORBELL_READ_OK) && wdone < wlen) { + bzero(rwbuf, sizeof(rwbuf)); + rwlen = (wlen - wdone) % sizeof(rwbuf); + bcopy(&wbuf[wdone], rwbuf, rwlen); + wdone += rwlen; + +#ifdef ARC_DEBUG + if (arcdebug & ARC_D_DB) { + printf("%s: write:", DEVNAME(sc)); + for (i = 0; i < rwlen; i++) + printf(" 0x%02x", rwbuf[i]); + printf("\n"); + } +#endif + + /* copy the chunk to the hw */ + arc_write(sc, ARC_REG_IOC_WBUF_LEN, rwlen); + arc_write_region(sc, ARC_REG_IOC_WBUF, rwbuf, + sizeof(rwbuf)); + + /* say we have a buffer for the hw */ + arc_write(sc, ARC_REG_INB_DOORBELL, + ARC_REG_INB_DOORBELL_WRITE_OK); + } + + while ((reg = arc_read(sc, ARC_REG_OUTB_DOORBELL)) == 0) + arc_wait(sc); + arc_write(sc, ARC_REG_OUTB_DOORBELL, reg); + + DNPRINTF(ARC_D_DB, "%s: reg: 0x%08x\n", DEVNAME(sc), reg); + + if ((reg & ARC_REG_OUTB_DOORBELL_WRITE_OK) && rdone < rlen) { + rwlen = arc_read(sc, ARC_REG_IOC_RBUF_LEN); + arc_read_region(sc, ARC_REG_IOC_RBUF, rwbuf, + sizeof(rwbuf)); + + arc_write(sc, ARC_REG_INB_DOORBELL, + ARC_REG_INB_DOORBELL_READ_OK); + +#ifdef ARC_DEBUG + printf("%s: len: %d+%d=%d/%d\n", DEVNAME(sc), + rwlen, rdone, rwlen + rdone, rlen); + if (arcdebug & ARC_D_DB) { + printf("%s: read:", DEVNAME(sc)); + for (i = 0; i < rwlen; i++) + printf(" 0x%02x", rwbuf[i]); + printf("\n"); + } +#endif + + if ((rdone + rwlen) > rlen) + return (EIO); + + bcopy(rwbuf, &rbuf[rdone], rwlen); + rdone += rwlen; + + } + + } while (rdone != rlen); + + return (0); +} + +void +arc_lock(struct arc_softc *sc) +{ + int s; + + rw_enter_write(&sc->sc_lock); + s = splbio(); + arc_write(sc, ARC_REG_INTRMASK, ~ARC_REG_INTRMASK_POSTQUEUE); + sc->sc_talking = 1; + splx(s); +} + +void +arc_unlock(struct arc_softc *sc) +{ + int s; + + s = splbio(); + sc->sc_talking = 0; + arc_write(sc, ARC_REG_INTRMASK, + ~(ARC_REG_INTRMASK_POSTQUEUE|ARC_REG_INTRSTAT_DOORBELL)); + splx(s); + rw_exit_write(&sc->sc_lock); +} + +void +arc_wait(struct arc_softc *sc) +{ + int s; + + s = splbio(); + arc_write(sc, ARC_REG_INTRMASK, + ~(ARC_REG_INTRMASK_POSTQUEUE|ARC_REG_INTRSTAT_DOORBELL)); + if (tsleep(sc, PWAIT, "arcdb", hz) == EWOULDBLOCK) + arc_write(sc, ARC_REG_INTRMASK, ~ARC_REG_INTRMASK_POSTQUEUE); + splx(s); +} + u_int32_t arc_read(struct arc_softc *sc, bus_size_t r) { |