void
tws_reset(void *arg)
{
struct tws_softc *sc = (struct tws_softc *)arg;
mtx_lock(&sc->gen_lock);
if ( tws_get_state(sc) == TWS_RESET ) {
mtx_unlock(&sc->gen_lock);
return;
}
tws_teardown_intr(sc);
xpt_freeze_simq(sc->sim, 1);
tws_send_event(sc, TWS_RESET_START);
device_printf(sc->tws_dev, "Resetting controller\n");
tws_assert_soft_reset(sc);
tws_turn_off_interrupts(sc);
tws_reset_cb( (void*) sc );
tws_reinit( (void*) sc );
// device_printf(sc->tws_dev, "Controller Reset complete!\n");
tws_send_event(sc, TWS_RESET_COMPLETE);
mtx_unlock(&sc->gen_lock);
xpt_release_simq(sc->sim, 1);
tws_setup_intr(sc, sc->irqs);
}
void
tws_timeout(void *arg)
{
struct tws_request *req = (struct tws_request *)arg;
struct tws_softc *sc = req->sc;
if ( req->error_code == TWS_REQ_RET_RESET ) {
return;
}
mtx_lock(&sc->gen_lock);
if ( req->error_code == TWS_REQ_RET_RESET ) {
mtx_unlock(&sc->gen_lock);
return;
}
if ( tws_get_state(sc) == TWS_RESET ) {
mtx_unlock(&sc->gen_lock);
return;
}
tws_teardown_intr(sc);
xpt_freeze_simq(sc->sim, 1);
tws_send_event(sc, TWS_RESET_START);
if (req->type == TWS_REQ_TYPE_SCSI_IO) {
device_printf(sc->tws_dev, "I/O Request timed out... Resetting controller\n");
} else if (req->type == TWS_REQ_TYPE_PASSTHRU) {
device_printf(sc->tws_dev, "IOCTL Request timed out... Resetting controller\n");
} else {
device_printf(sc->tws_dev, "Internal Request timed out... Resetting controller\n");
}
tws_assert_soft_reset(sc);
tws_turn_off_interrupts(sc);
tws_reset_cb( (void*) sc );
tws_reinit( (void*) sc );
// device_printf(sc->tws_dev, "Controller Reset complete!\n");
tws_send_event(sc, TWS_RESET_COMPLETE);
mtx_unlock(&sc->gen_lock);
xpt_release_simq(sc->sim, 1);
tws_setup_intr(sc, sc->irqs);
}
static void
tws_bus_scan_cb(struct cam_periph *periph, union ccb *ccb)
{
struct tws_softc *sc = periph->softc;
/* calling trace results in non-sleepable lock head panic
using printf to debug */
if (ccb->ccb_h.status != CAM_REQ_CMP) {
kprintf("cam_scan failure\n");
lockmgr(&sc->gen_lock, LK_EXCLUSIVE);
tws_send_event(sc, TWS_SCAN_FAILURE);
lockmgr(&sc->gen_lock, LK_RELEASE);
}
xpt_free_path(ccb->ccb_h.path);
}
void
tws_reset(void *arg)
{
struct tws_softc *sc = (struct tws_softc *)arg;
if ( tws_get_state(sc) == TWS_RESET ) {
return;
}
device_printf(sc->tws_dev, "Resetting controller\n");
lockmgr(&sc->gen_lock, LK_EXCLUSIVE);
tws_send_event(sc, TWS_RESET_START);
lockmgr(&sc->gen_lock, LK_RELEASE);
tws_turn_off_interrupts(sc);
lockmgr(&sc->sim_lock, LK_EXCLUSIVE);
tws_freeze_simq(sc);
lockmgr(&sc->sim_lock, LK_RELEASE);
tws_assert_soft_reset(sc);
callout_reset(&sc->reset_cb_handle, hz/10, tws_reset_cb, sc);
}
static int
tws_detach(device_t dev)
{
struct tws_softc *sc = device_get_softc(dev);
int i;
u_int32_t reg;
TWS_TRACE_DEBUG(sc, "entry", 0, 0);
mtx_lock(&sc->gen_lock);
tws_send_event(sc, TWS_UNINIT_START);
mtx_unlock(&sc->gen_lock);
/* needs to disable interrupt before detaching from cam */
tws_turn_off_interrupts(sc);
/* clear door bell */
tws_write_reg(sc, TWS_I2O0_HOBDBC, ~0, 4);
reg = tws_read_reg(sc, TWS_I2O0_HIMASK, 4);
TWS_TRACE_DEBUG(sc, "turn-off-intr", reg, 0);
sc->obfl_q_overrun = false;
tws_init_connect(sc, 1);
/* Teardown the state in our softc created in our attach routine. */
/* Disconnect the interrupt handler. */
tws_teardown_intr(sc);
/* Release irq resource */
for(i=0;i<sc->irqs;i++) {
if ( sc->irq_res[i] ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_IRQ, sc->irq_res_id[i], sc->irq_res[i]))
TWS_TRACE(sc, "bus release irq resource",
i, sc->irq_res_id[i]);
}
}
if ( sc->intr_type == TWS_MSI ) {
pci_release_msi(sc->tws_dev);
}
tws_cam_detach(sc);
/* Release memory resource */
if ( sc->mfa_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->mfa_res_id, sc->mfa_res))
TWS_TRACE(sc, "bus release mem resource", 0, sc->mfa_res_id);
}
if ( sc->reg_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res))
TWS_TRACE(sc, "bus release mem resource", 0, sc->reg_res_id);
}
free(sc->reqs, M_TWS);
free(sc->sense_bufs, M_TWS);
free(sc->scan_ccb, M_TWS);
if (sc->ioctl_data_mem)
bus_dmamem_free(sc->data_tag, sc->ioctl_data_mem, sc->ioctl_data_map);
free(sc->aen_q.q, M_TWS);
free(sc->trace_q.q, M_TWS);
mtx_destroy(&sc->q_lock);
mtx_destroy(&sc->sim_lock);
mtx_destroy(&sc->gen_lock);
mtx_destroy(&sc->io_lock);
destroy_dev(sc->tws_cdev);
sysctl_ctx_free(&sc->tws_clist);
return (0);
}
static int
tws_attach(device_t dev)
{
struct tws_softc *sc = device_get_softc(dev);
u_int32_t bar;
int error=0,i;
/* no tracing yet */
/* Look up our softc and initialize its fields. */
sc->tws_dev = dev;
sc->device_id = pci_get_device(dev);
sc->subvendor_id = pci_get_subvendor(dev);
sc->subdevice_id = pci_get_subdevice(dev);
/* Intialize mutexes */
mtx_init( &sc->q_lock, "tws_q_lock", NULL, MTX_DEF);
mtx_init( &sc->sim_lock, "tws_sim_lock", NULL, MTX_DEF);
mtx_init( &sc->gen_lock, "tws_gen_lock", NULL, MTX_DEF);
mtx_init( &sc->io_lock, "tws_io_lock", NULL, MTX_DEF | MTX_RECURSE);
if ( tws_init_trace_q(sc) == FAILURE )
printf("trace init failure\n");
/* send init event */
mtx_lock(&sc->gen_lock);
tws_send_event(sc, TWS_INIT_START);
mtx_unlock(&sc->gen_lock);
#if _BYTE_ORDER == _BIG_ENDIAN
TWS_TRACE(sc, "BIG endian", 0, 0);
#endif
/* sysctl context setup */
sysctl_ctx_init(&sc->tws_clist);
sc->tws_oidp = SYSCTL_ADD_NODE(&sc->tws_clist,
SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO,
device_get_nameunit(dev),
CTLFLAG_RD, 0, "");
if ( sc->tws_oidp == NULL ) {
tws_log(sc, SYSCTL_TREE_NODE_ADD);
goto attach_fail_1;
}
SYSCTL_ADD_STRING(&sc->tws_clist, SYSCTL_CHILDREN(sc->tws_oidp),
OID_AUTO, "driver_version", CTLFLAG_RD,
TWS_DRIVER_VERSION_STRING, 0, "TWS driver version");
pci_enable_busmaster(dev);
bar = pci_read_config(dev, TWS_PCI_BAR0, 4);
TWS_TRACE_DEBUG(sc, "bar0 ", bar, 0);
bar = pci_read_config(dev, TWS_PCI_BAR1, 4);
bar = bar & ~TWS_BIT2;
TWS_TRACE_DEBUG(sc, "bar1 ", bar, 0);
/* MFA base address is BAR2 register used for
* push mode. Firmware will evatualy move to
* pull mode during witch this needs to change
*/
#ifndef TWS_PULL_MODE_ENABLE
sc->mfa_base = (u_int64_t)pci_read_config(dev, TWS_PCI_BAR2, 4);
sc->mfa_base = sc->mfa_base & ~TWS_BIT2;
TWS_TRACE_DEBUG(sc, "bar2 ", sc->mfa_base, 0);
#endif
/* allocate MMIO register space */
sc->reg_res_id = TWS_PCI_BAR1; /* BAR1 offset */
if ((sc->reg_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
&(sc->reg_res_id), 0, ~0, 1, RF_ACTIVE))
== NULL) {
tws_log(sc, ALLOC_MEMORY_RES);
goto attach_fail_1;
}
sc->bus_tag = rman_get_bustag(sc->reg_res);
sc->bus_handle = rman_get_bushandle(sc->reg_res);
#ifndef TWS_PULL_MODE_ENABLE
/* Allocate bus space for inbound mfa */
sc->mfa_res_id = TWS_PCI_BAR2; /* BAR2 offset */
if ((sc->mfa_res = bus_alloc_resource(dev, SYS_RES_MEMORY,
&(sc->mfa_res_id), 0, ~0, 0x100000, RF_ACTIVE))
== NULL) {
tws_log(sc, ALLOC_MEMORY_RES);
goto attach_fail_2;
}
sc->bus_mfa_tag = rman_get_bustag(sc->mfa_res);
sc->bus_mfa_handle = rman_get_bushandle(sc->mfa_res);
#endif
/* Allocate and register our interrupt. */
sc->intr_type = TWS_INTx; /* default */
if ( tws_enable_msi )
sc->intr_type = TWS_MSI;
if ( tws_setup_irq(sc) == FAILURE ) {
tws_log(sc, ALLOC_MEMORY_RES);
goto attach_fail_3;
}
/*
* Create a /dev entry for this device. The kernel will assign us
* a major number automatically. We use the unit number of this
* device as the minor number and name the character device
* "tws<unit>".
*/
sc->tws_cdev = make_dev(&tws_cdevsw, device_get_unit(dev),
UID_ROOT, GID_OPERATOR, S_IRUSR | S_IWUSR, "tws%u",
device_get_unit(dev));
sc->tws_cdev->si_drv1 = sc;
if ( tws_init(sc) == FAILURE ) {
tws_log(sc, TWS_INIT_FAILURE);
goto attach_fail_4;
}
if ( tws_init_ctlr(sc) == FAILURE ) {
tws_log(sc, TWS_CTLR_INIT_FAILURE);
goto attach_fail_4;
}
if ((error = tws_cam_attach(sc))) {
tws_log(sc, TWS_CAM_ATTACH);
goto attach_fail_4;
}
/* send init complete event */
mtx_lock(&sc->gen_lock);
tws_send_event(sc, TWS_INIT_COMPLETE);
mtx_unlock(&sc->gen_lock);
TWS_TRACE_DEBUG(sc, "attached successfully", 0, sc->device_id);
return(0);
attach_fail_4:
tws_teardown_intr(sc);
destroy_dev(sc->tws_cdev);
attach_fail_3:
for(i=0;i<sc->irqs;i++) {
if ( sc->irq_res[i] ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_IRQ, sc->irq_res_id[i], sc->irq_res[i]))
TWS_TRACE(sc, "bus irq res", 0, 0);
}
}
#ifndef TWS_PULL_MODE_ENABLE
attach_fail_2:
#endif
if ( sc->mfa_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->mfa_res_id, sc->mfa_res))
TWS_TRACE(sc, "bus release ", 0, sc->mfa_res_id);
}
if ( sc->reg_res ){
if (bus_release_resource(sc->tws_dev,
SYS_RES_MEMORY, sc->reg_res_id, sc->reg_res))
TWS_TRACE(sc, "bus release2 ", 0, sc->reg_res_id);
}
attach_fail_1:
mtx_destroy(&sc->q_lock);
mtx_destroy(&sc->sim_lock);
mtx_destroy(&sc->gen_lock);
mtx_destroy(&sc->io_lock);
sysctl_ctx_free(&sc->tws_clist);
return (ENXIO);
}
