* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband:
IB/ipath: tidy up white space in a few files
IB/ipath: fix label name in interrupt handler
IB/ipath: improve sparse annotation
IB/ipath: simplify IB timer usage
IB/ipath: simplify RC send posting
IB/ipath: prevent hardware from being accessed during reset
IB/ipath: fix verbs registration
IB/ipath: change handling of PIO buffers
IB/ipath: iterate over correct number of ports during reset
IB/ipath: set up 32-bit DMA mask if 64-bit setup fails
IB/ipath: fix race with exposing reset file
IB/mthca: Fix offset in query_gid method
#define __IPATH_KERNEL_SEND 0x2000 /* use kernel mode send */
#define __IPATH_EPKTDBG 0x4000 /* print ethernet packet data */
#define __IPATH_SMADBG 0x8000 /* sma packet debug */
-#define __IPATH_IPATHDBG 0x10000 /* Ethernet (IPATH) general debug on */
-#define __IPATH_IPATHWARN 0x20000 /* Ethernet (IPATH) warnings on */
-#define __IPATH_IPATHERR 0x40000 /* Ethernet (IPATH) errors on */
-#define __IPATH_IPATHPD 0x80000 /* Ethernet (IPATH) packet dump on */
-#define __IPATH_IPATHTABLE 0x100000 /* Ethernet (IPATH) table dump on */
+#define __IPATH_IPATHDBG 0x10000 /* Ethernet (IPATH) gen debug */
+#define __IPATH_IPATHWARN 0x20000 /* Ethernet (IPATH) warnings */
+#define __IPATH_IPATHERR 0x40000 /* Ethernet (IPATH) errors */
+#define __IPATH_IPATHPD 0x80000 /* Ethernet (IPATH) packet dump */
+#define __IPATH_IPATHTABLE 0x100000 /* Ethernet (IPATH) table dump */
#else /* _IPATH_DEBUGGING */
#define __IPATH_TRSAMPLE 0x0 /* generate trace buffer sample entries */
#define __IPATH_VERBDBG 0x0 /* very verbose debug */
#define __IPATH_PKTDBG 0x0 /* print packet data */
-#define __IPATH_PROCDBG 0x0 /* print process startup (init)/exit messages */
+#define __IPATH_PROCDBG 0x0 /* process startup (init)/exit messages */
/* print mmap/nopage stuff, not using VDBG any more */
#define __IPATH_MMDBG 0x0
#define __IPATH_EPKTDBG 0x0 /* print ethernet packet data */
-#define __IPATH_SMADBG 0x0 /* print process startup (init)/exit messages */#define __IPATH_IPATHDBG 0x0 /* Ethernet (IPATH) table dump on */
+#define __IPATH_SMADBG 0x0 /* process startup (init)/exit messages */
+#define __IPATH_IPATHDBG 0x0 /* Ethernet (IPATH) table dump on */
#define __IPATH_IPATHWARN 0x0 /* Ethernet (IPATH) warnings on */
#define __IPATH_IPATHERR 0x0 /* Ethernet (IPATH) errors on */
#define __IPATH_IPATHPD 0x0 /* Ethernet (IPATH) packet dump on */
bail:
spin_unlock_irqrestore(&ipath_devs_lock, flags);
- mutex_unlock(&ipath_mutex);
/* Only expose a way to reset the device if we
make it into diag mode. */
if (ret == 0)
ipath_expose_reset(&dd->pcidev->dev);
+ mutex_unlock(&ipath_mutex);
+
return ret;
}
ret = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
if (ret) {
- dev_info(&pdev->dev, "pci_set_dma_mask unit %u "
- "fails: %d\n", dd->ipath_unit, ret);
- goto bail_regions;
+ /*
+ * if the 64 bit setup fails, try 32 bit. Some systems
+ * do not setup 64 bit maps on systems with 2GB or less
+ * memory installed.
+ */
+ ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
+ if (ret) {
+ dev_info(&pdev->dev, "pci_set_dma_mask unit %u "
+ "fails: %d\n", dd->ipath_unit, ret);
+ goto bail_regions;
+ }
+ else
+ ipath_dbg("No 64bit DMA mask, used 32 bit mask\n");
}
pci_set_master(pdev);
}
if (dd->ipath_pd)
- for (i = 1; i < dd->ipath_portcnt; i++) {
+ for (i = 1; i < dd->ipath_cfgports; i++) {
if (dd->ipath_pd[i] && dd->ipath_pd[i]->port_cnt) {
ipath_dbg("unit %u port %d is in use "
"(PID %u cmd %s), can't reset\n",
/*
* Number of buffers reserved for driver (layered drivers and SMA
- * send). Reserved at end of buffer list.
+ * send). Reserved at end of buffer list. Initialized based on
+ * number of PIO buffers if not set via module interface.
+ * The problem with this is that it's global, but we'll use different
+ * numbers for different chip types. So the default value is not
+ * very useful. I've redefined it for the 1.3 release so that it's
+ * zero unless set by the user to something else, in which case we
+ * try to respect it.
*/
-static ushort ipath_kpiobufs = 32;
+static ushort ipath_kpiobufs;
static int ipath_set_kpiobufs(const char *val, struct kernel_param *kp);
-module_param_call(kpiobufs, ipath_set_kpiobufs, param_get_uint,
+module_param_call(kpiobufs, ipath_set_kpiobufs, param_get_ushort,
&ipath_kpiobufs, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(kpiobufs, "Set number of PIO buffers for driver");
* Don't clear ipath_flags as 8bit mode was set before
* entering this func. However, we do set the linkstate to
* unknown, so we can watch for a transition.
+ * PRESENT is set because we want register reads to work,
+ * and the kernel infrastructure saw it in config space;
+ * We clear it if we have failures.
*/
- dd->ipath_flags |= IPATH_LINKUNK;
+ dd->ipath_flags |= IPATH_LINKUNK | IPATH_PRESENT;
dd->ipath_flags &= ~(IPATH_LINKACTIVE | IPATH_LINKARMED |
IPATH_LINKDOWN | IPATH_LINKINIT);
|| (dd->ipath_uregbase & 0xffffffff) == 0xffffffff) {
ipath_dev_err(dd, "Register read failures from chip, "
"giving up initialization\n");
+ dd->ipath_flags &= ~IPATH_PRESENT;
ret = -ENODEV;
goto done;
}
*/
dd->ipath_pioavregs = ALIGN(val, sizeof(u64) * BITS_PER_BYTE / 2)
/ (sizeof(u64) * BITS_PER_BYTE / 2);
- if (!ipath_kpiobufs) /* have to have at least 1, for SMA */
- kpiobufs = ipath_kpiobufs = 1;
- else if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) <
- (dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT)) {
- dev_info(&dd->pcidev->dev, "Too few PIO buffers (%u) "
- "for %u ports to have %u each!\n",
- dd->ipath_piobcnt2k + dd->ipath_piobcnt4k,
- dd->ipath_cfgports, IPATH_MIN_USER_PORT_BUFCNT);
- kpiobufs = 1; /* reserve just the minimum for SMA/ether */
- } else
+ if (ipath_kpiobufs == 0) {
+ /* not set by user, or set explictly to default */
+ if ((dd->ipath_piobcnt2k + dd->ipath_piobcnt4k) > 128)
+ kpiobufs = 32;
+ else
+ kpiobufs = 16;
+ }
+ else
kpiobufs = ipath_kpiobufs;
if (kpiobufs >
ret = __ipath_layer_intr(dd, IPATH_LAYER_INT_SEND_CONTINUE);
if (ret > 0)
- goto clear;
+ goto set;
ret = __ipath_verbs_piobufavail(dd);
if (ret > 0)
- goto clear;
+ goto set;
return;
-clear:
+set:
set_bit(IPATH_S_PIOINTBUFAVAIL, &dd->ipath_sendctrl);
ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
dd->ipath_sendctrl);
irqreturn_t ipath_intr(int irq, void *data, struct pt_regs *regs)
{
struct ipath_devdata *dd = data;
- u32 istat = ipath_read_kreg32(dd, dd->ipath_kregs->kr_intstatus);
+ u32 istat;
ipath_err_t estat = 0;
static unsigned unexpected = 0;
irqreturn_t ret;
+ if(!(dd->ipath_flags & IPATH_PRESENT)) {
+ /* this is mostly so we don't try to touch the chip while
+ * it is being reset */
+ /*
+ * This return value is perhaps odd, but we do not want the
+ * interrupt core code to remove our interrupt handler
+ * because we don't appear to be handling an interrupt
+ * during a chip reset.
+ */
+ return IRQ_HANDLED;
+ }
+
+ istat = ipath_read_kreg32(dd, dd->ipath_kregs->kr_intstatus);
if (unlikely(!istat)) {
ipath_stats.sps_nullintr++;
ret = IRQ_NONE; /* not our interrupt, or already handled */
static inline u32 ipath_read_ureg32(const struct ipath_devdata *dd,
ipath_ureg regno, int port)
{
- if (!dd->ipath_kregbase)
+ if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
return 0;
return readl(regno + (u64 __iomem *)
static inline u32 ipath_read_kreg32(const struct ipath_devdata *dd,
ipath_kreg regno)
{
- if (!dd->ipath_kregbase)
+ if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
return -1;
return readl((u32 __iomem *) & dd->ipath_kregbase[regno]);
}
static inline u64 ipath_read_kreg64(const struct ipath_devdata *dd,
ipath_kreg regno)
{
- if (!dd->ipath_kregbase)
+ if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
return -1;
return readq(&dd->ipath_kregbase[regno]);
static inline u64 ipath_read_creg(const struct ipath_devdata *dd,
ipath_sreg regno)
{
- if (!dd->ipath_kregbase)
+ if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
return 0;
return readq(regno + (u64 __iomem *)
static inline u32 ipath_read_creg32(const struct ipath_devdata *dd,
ipath_sreg regno)
{
- if (!dd->ipath_kregbase)
+ if (!dd->ipath_kregbase || !(dd->ipath_flags & IPATH_PRESENT))
return 0;
return readl(regno + (u64 __iomem *)
(dd->ipath_cregbase +
/* Acquire before ipath_devs_lock. */
static DEFINE_MUTEX(ipath_layer_mutex);
+static int ipath_verbs_registered;
+
u16 ipath_layer_rcv_opcode;
+
static int (*layer_intr)(void *, u32);
static int (*layer_rcv)(void *, void *, struct sk_buff *);
static int (*layer_rcv_lid)(void *, void *);
static int (*verbs_piobufavail)(void *);
static void (*verbs_rcv)(void *, void *, void *, u32);
-static int ipath_verbs_registered;
static void *(*layer_add_one)(int, struct ipath_devdata *);
static void (*layer_remove_one)(void *);
verbs_rcv = NULL;
verbs_timer_cb = NULL;
+ ipath_verbs_registered = 0;
+
mutex_unlock(&ipath_layer_mutex);
}
/* Use ERROR so it shows up in logs, etc. */
ipath_dev_err(dd, "Resetting PE-800 unit %u\n",
dd->ipath_unit);
+ /* keep chip from being accessed in a few places */
+ dd->ipath_flags &= ~(IPATH_INITTED|IPATH_PRESENT);
val = dd->ipath_control | INFINIPATH_C_RESET;
ipath_write_kreg(dd, dd->ipath_kregs->kr_control, val);
mb();
if ((r = pci_enable_device(dd->pcidev)))
ipath_dev_err(dd, "pci_enable_device failed after "
"reset: %d\n", r);
+ /* whether it worked or not, mark as present, again */
+ dd->ipath_flags |= IPATH_PRESENT;
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
if (val == dd->ipath_revision) {
ipath_cdbg(VERBOSE, "Got matching revision "
#define _IPATH_REGISTERS_H
/*
- * This file should only be included by kernel source, and by the diags.
- * It defines the registers, and their contents, for the InfiniPath HT-400 chip
+ * This file should only be included by kernel source, and by the diags. It
+ * defines the registers, and their contents, for the InfiniPath HT-400
+ * chip.
*/
/*
#define INFINIPATH_IBCC_FLOWCTRLWATERMARK_SHIFT 8
#define INFINIPATH_IBCC_LINKINITCMD_MASK 0x3ULL
#define INFINIPATH_IBCC_LINKINITCMD_DISABLE 1
-#define INFINIPATH_IBCC_LINKINITCMD_POLL 2 /* cycle through TS1/TS2 till OK */
-#define INFINIPATH_IBCC_LINKINITCMD_SLEEP 3 /* wait for TS1, then go on */
+/* cycle through TS1/TS2 till OK */
+#define INFINIPATH_IBCC_LINKINITCMD_POLL 2
+/* wait for TS1, then go on */
+#define INFINIPATH_IBCC_LINKINITCMD_SLEEP 3
#define INFINIPATH_IBCC_LINKINITCMD_SHIFT 16
#define INFINIPATH_IBCC_LINKCMD_MASK 0x3ULL
#define INFINIPATH_IBCC_LINKCMD_INIT 1 /* move to 0x11 */
#define INFINIPATH_IBCS_LINKSTATE_SHIFT 4
#define INFINIPATH_IBCS_TXREADY 0x40000000
#define INFINIPATH_IBCS_TXCREDITOK 0x80000000
-/* link training states (shift by INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) */
+/* link training states (shift by
+ INFINIPATH_IBCS_LINKTRAININGSTATE_SHIFT) */
#define INFINIPATH_IBCS_LT_STATE_DISABLED 0x00
#define INFINIPATH_IBCS_LT_STATE_LINKUP 0x01
#define INFINIPATH_IBCS_LT_STATE_POLLACTIVE 0x02
/* kr_serdesconfig0 bits */
#define INFINIPATH_SERDC0_RESET_MASK 0xfULL /* overal reset bits */
#define INFINIPATH_SERDC0_RESET_PLL 0x10000000ULL /* pll reset */
-#define INFINIPATH_SERDC0_TXIDLE 0xF000ULL /* tx idle enables (per lane) */
-#define INFINIPATH_SERDC0_RXDETECT_EN 0xF0000ULL /* rx detect enables (per lane) */
-#define INFINIPATH_SERDC0_L1PWR_DN 0xF0ULL /* L1 Power down; use with RXDETECT,
- Otherwise not used on IB side */
+/* tx idle enables (per lane) */
+#define INFINIPATH_SERDC0_TXIDLE 0xF000ULL
+/* rx detect enables (per lane) */
+#define INFINIPATH_SERDC0_RXDETECT_EN 0xF0000ULL
+/* L1 Power down; use with RXDETECT, Otherwise not used on IB side */
+#define INFINIPATH_SERDC0_L1PWR_DN 0xF0ULL
/* kr_xgxsconfig bits */
#define INFINIPATH_XGXS_RESET 0x7ULL
ipath_kreg kr_txintmemsize;
ipath_kreg kr_xgxsconfig;
ipath_kreg kr_ibpllcfg;
- /* use these two (and the following N ports) only with ipath_k*_kreg64_port();
- * not *kreg64() */
+ /* use these two (and the following N ports) only with
+ * ipath_k*_kreg64_port(); not *kreg64() */
ipath_kreg kr_rcvhdraddr;
ipath_kreg kr_rcvhdrtailaddr;
- /* remaining registers are not present on all types of infinipath chips */
+ /* remaining registers are not present on all types of infinipath
+ chips */
ipath_kreg kr_rcvpktledcnt;
ipath_kreg kr_pcierbuftestreg0;
ipath_kreg kr_pcierbuftestreg1;
}
wqe->wr.num_sge = j;
qp->s_head = next;
- /*
- * Wake up the send tasklet if the QP is not waiting
- * for an RNR timeout.
- */
- next = qp->s_rnr_timeout;
spin_unlock_irqrestore(&qp->s_lock, flags);
- if (next == 0) {
- if (qp->ibqp.qp_type == IB_QPT_UC)
- ipath_do_uc_send((unsigned long) qp);
- else
- ipath_do_rc_send((unsigned long) qp);
- }
+ if (qp->ibqp.qp_type == IB_QPT_UC)
+ ipath_do_uc_send((unsigned long) qp);
+ else
+ ipath_do_rc_send((unsigned long) qp);
ret = 0;
* enters diag mode. A device reset is quite likely to crash the
* machine entirely, so we don't want to normally make it
* available.
+ *
+ * Called with ipath_mutex held.
*/
int ipath_expose_reset(struct device *dev)
{
- return device_create_file(dev, &dev_attr_reset);
+ static int exposed;
+ int ret;
+
+ if (!exposed) {
+ ret = device_create_file(dev, &dev_attr_reset);
+ exposed = 1;
+ }
+ else
+ ret = 0;
+
+ return ret;
}
int ipath_driver_create_group(struct device_driver *drv)
* This is called from ipath_post_ud_send() to forward a WQE addressed
* to the same HCA.
*/
-static void ipath_ud_loopback(struct ipath_qp *sqp, struct ipath_sge_state *ss,
- u32 length, struct ib_send_wr *wr, struct ib_wc *wc)
+static void ipath_ud_loopback(struct ipath_qp *sqp,
+ struct ipath_sge_state *ss,
+ u32 length, struct ib_send_wr *wr,
+ struct ib_wc *wc)
{
struct ipath_ibdev *dev = to_idev(sqp->ibqp.device);
struct ipath_qp *qp;
{
struct ipath_ibdev *dev = (struct ipath_ibdev *) arg;
struct ipath_qp *resend = NULL;
- struct ipath_qp *rnr = NULL;
struct list_head *last;
struct ipath_qp *qp;
unsigned long flags;
last = &dev->pending[dev->pending_index];
while (!list_empty(last)) {
qp = list_entry(last->next, struct ipath_qp, timerwait);
- if (last->next == LIST_POISON1 ||
- last->next != &qp->timerwait ||
- qp->timerwait.prev != last) {
- INIT_LIST_HEAD(last);
- } else {
- list_del(&qp->timerwait);
- qp->timerwait.prev = (struct list_head *) resend;
- resend = qp;
- atomic_inc(&qp->refcount);
- }
+ list_del(&qp->timerwait);
+ qp->timer_next = resend;
+ resend = qp;
+ atomic_inc(&qp->refcount);
}
last = &dev->rnrwait;
if (!list_empty(last)) {
qp = list_entry(last->next, struct ipath_qp, timerwait);
if (--qp->s_rnr_timeout == 0) {
do {
- if (last->next == LIST_POISON1 ||
- last->next != &qp->timerwait ||
- qp->timerwait.prev != last) {
- INIT_LIST_HEAD(last);
- break;
- }
list_del(&qp->timerwait);
- qp->timerwait.prev =
- (struct list_head *) rnr;
- rnr = qp;
+ tasklet_hi_schedule(&qp->s_task);
if (list_empty(last))
break;
qp = list_entry(last->next, struct ipath_qp,
spin_unlock_irqrestore(&dev->pending_lock, flags);
/* XXX What if timer fires again while this is running? */
- for (qp = resend; qp != NULL;
- qp = (struct ipath_qp *) qp->timerwait.prev) {
+ for (qp = resend; qp != NULL; qp = qp->timer_next) {
struct ib_wc wc;
spin_lock_irqsave(&qp->s_lock, flags);
if (atomic_dec_and_test(&qp->refcount))
wake_up(&qp->wait);
}
- for (qp = rnr; qp != NULL;
- qp = (struct ipath_qp *) qp->timerwait.prev)
- tasklet_hi_schedule(&qp->s_task);
}
/**
*
* This is called from ipath_intr() at interrupt level when a PIO buffer is
* available after ipath_verbs_send() returned an error that no buffers were
- * available. Return 0 if we consumed all the PIO buffers and we still have
+ * available. Return 1 if we consumed all the PIO buffers and we still have
* QPs waiting for buffers (for now, just do a tasklet_hi_schedule and
- * return one).
+ * return zero).
*/
static int ipath_ib_piobufavail(void *arg)
{
spin_unlock_irqrestore(&dev->pending_lock, flags);
bail:
- return 1;
+ return 0;
}
static int ipath_query_device(struct ib_device *ibdev,
len = sprintf(buf,
"RC resends %d\n"
- "RC QACKs %d\n"
+ "RC no QACK %d\n"
"RC ACKs %d\n"
"RC SEQ NAKs %d\n"
"RC RDMA seq %d\n"
*/
struct ipath_qp {
struct ib_qp ibqp;
- struct ipath_qp *next; /* link list for QPN hash table */
+ struct ipath_qp *next; /* link list for QPN hash table */
+ struct ipath_qp *timer_next; /* link list for ipath_ib_timer() */
struct list_head piowait; /* link for wait PIO buf */
struct list_head timerwait; /* link for waiting for timeouts */
struct ib_ah_attr remote_ah_attr;
__u8 seq_num;
__le32 len;
/* MUST be of word size due to PIO write requirements */
- __u32 csum;
+ __le32 csum;
__le16 csum_offset;
__le16 flags;
__u16 first_2_bytes;
goto out;
}
- memcpy(gid->raw + 8, out_mad->data + (index % 8) * 16, 8);
+ memcpy(gid->raw + 8, out_mad->data + (index % 8) * 8, 8);
out:
kfree(in_mad);
projects / cascardo / linux.git / commitdiff