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IB/ipath: Support revision 2 InfiniPath PCIE devices 

This also entailed a little GPIO-interrupt general cleanup.

Signed-off-by: Bryan O'Sullivan <bryan.osullivan@qlogic.com>
Signed-off-by: Roland Dreier <rolandd@cisco.com>
This commit is contained in:
Bryan O'Sullivan 2006-09-28 09:00:00 -07:00 committed by Roland Dreier
parent 9929b0fb0f
commit 2c9446a1d6
5 changed files with 215 additions and 37 deletions
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2
drivers/infiniband/hw/ipath/ipath_common.h
View File

@ -186,6 +186,8 @@ typedef enum _ipath_ureg {
#define IPATH_RUNTIME_FORCE_WC_ORDER 0x4
#define IPATH_RUNTIME_RCVHDR_COPY 0x8
#define IPATH_RUNTIME_MASTER 0x10
#define IPATH_RUNTIME_PBC_REWRITE 0x20
#define IPATH_RUNTIME_LOOSE_DMA_ALIGN 0x40
/*
* This structure is returned by ipath_userinit() immediately after

116
drivers/infiniband/hw/ipath/ipath_iba6120.c
View File

@ -294,6 +294,13 @@ static const struct ipath_cregs ipath_pe_cregs = {
#define IPATH_GPIO_SCL (1ULL << \
(_IPATH_GPIO_SCL_NUM+INFINIPATH_EXTC_GPIOOE_SHIFT))
/*
* Rev2 silicon allows suppressing check for ArmLaunch errors.
* this can speed up short packet sends on systems that do
* not guaranteee write-order.
*/
#define INFINIPATH_XGXS_SUPPRESS_ARMLAUNCH_ERR (1ULL<<63)
/**
* ipath_pe_handle_hwerrors - display hardware errors.
* @dd: the infinipath device
@ -571,9 +578,12 @@ static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
if (!dd->ipath_boardrev) // no PLL for Emulator
val &= ~INFINIPATH_HWE_SERDESPLLFAILED;
/* workaround bug 9460 in internal interface bus parity checking */
val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
if (dd->ipath_minrev < 2) {
/* workaround bug 9460 in internal interface bus parity
* checking. Fixed (HW bug 9490) in Rev2.
*/
val &= ~INFINIPATH_HWE_PCIEBUSPARITYRADM;
}
dd->ipath_hwerrmask = val;
}
@ -583,8 +593,8 @@ static void ipath_pe_init_hwerrors(struct ipath_devdata *dd)
*/
static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
{
u64 val, tmp, config1;
int ret = 0, change = 0;
u64 val, tmp, config1, prev_val;
int ret = 0;
ipath_dbg("Trying to bringup serdes\n");
@ -641,6 +651,7 @@ static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_xgxsconfig);
prev_val = val;
if (((val >> INFINIPATH_XGXS_MDIOADDR_SHIFT) &
INFINIPATH_XGXS_MDIOADDR_MASK) != 3) {
val &=
@ -648,11 +659,9 @@ static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
INFINIPATH_XGXS_MDIOADDR_SHIFT);
/* MDIO address 3 */
val |= 3ULL << INFINIPATH_XGXS_MDIOADDR_SHIFT;
change = 1;
}
if (val & INFINIPATH_XGXS_RESET) {
val &= ~INFINIPATH_XGXS_RESET;
change = 1;
}
if (((val >> INFINIPATH_XGXS_RX_POL_SHIFT) &
INFINIPATH_XGXS_RX_POL_MASK) != dd->ipath_rx_pol_inv ) {
@ -661,9 +670,19 @@ static int ipath_pe_bringup_serdes(struct ipath_devdata *dd)
INFINIPATH_XGXS_RX_POL_SHIFT);
val |= dd->ipath_rx_pol_inv <<
INFINIPATH_XGXS_RX_POL_SHIFT;
change = 1;
}
if (change)
if (dd->ipath_minrev >= 2) {
/* Rev 2. can tolerate multiple writes to PBC, and
* allowing them can provide lower latency on some
* CPUs, but this feature is off by default, only
* turned on by setting D63 of XGXSconfig reg.
* May want to make this conditional more
* fine-grained in future. This is not exactly
* related to XGXS, but where the bit ended up.
*/
val |= INFINIPATH_XGXS_SUPPRESS_ARMLAUNCH_ERR;
}
if (val != prev_val)
ipath_write_kreg(dd, dd->ipath_kregs->kr_xgxsconfig, val);
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_serdesconfig0);
@ -717,9 +736,25 @@ static void ipath_pe_quiet_serdes(struct ipath_devdata *dd)
ipath_write_kreg(dd, dd->ipath_kregs->kr_serdesconfig0, val);
}
/* this is not yet needed on this chip, so just return 0. */
static int ipath_pe_intconfig(struct ipath_devdata *dd)
{
u64 val;
u32 chiprev;
/*
* If the chip supports added error indication via GPIO pins,
* enable interrupts on those bits so the interrupt routine
* can count the events. Also set flag so interrupt routine
* can know they are expected.
*/
chiprev = dd->ipath_revision >> INFINIPATH_R_CHIPREVMINOR_SHIFT;
if ((chiprev & INFINIPATH_R_CHIPREVMINOR_MASK) > 1) {
/* Rev2+ reports extra errors via internal GPIO pins */
dd->ipath_flags |= IPATH_GPIO_ERRINTRS;
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_gpio_mask);
val |= IPATH_GPIO_ERRINTR_MASK;
ipath_write_kreg( dd, dd->ipath_kregs->kr_gpio_mask, val);
}
return 0;
}
@ -1082,6 +1117,45 @@ static void ipath_pe_put_tid(struct ipath_devdata *dd, u64 __iomem *tidptr,
mmiowb();
spin_unlock_irqrestore(&dd->ipath_tid_lock, flags);
}
/**
* ipath_pe_put_tid_2 - write a TID in chip, Revision 2 or higher
* @dd: the infinipath device
* @tidptr: pointer to the expected TID (in chip) to udpate
* @tidtype: 0 for eager, 1 for expected
* @pa: physical address of in memory buffer; ipath_tidinvalid if freeing
*
* This exists as a separate routine to allow for selection of the
* appropriate "flavor". The static calls in cleanup just use the
* revision-agnostic form, as they are not performance critical.
*/
static void ipath_pe_put_tid_2(struct ipath_devdata *dd, u64 __iomem *tidptr,
u32 type, unsigned long pa)
{
u32 __iomem *tidp32 = (u32 __iomem *)tidptr;
if (pa != dd->ipath_tidinvalid) {
if (pa & ((1U << 11) - 1)) {
dev_info(&dd->pcidev->dev, "BUG: physaddr %lx "
"not 4KB aligned!\n", pa);
return;
}
pa >>= 11;
/* paranoia check */
if (pa & (7<<29))
ipath_dev_err(dd,
"BUG: Physical page address 0x%lx "
"has bits set in 31-29\n", pa);
if (type == 0)
pa |= dd->ipath_tidtemplate;
else /* for now, always full 4KB page */
pa |= 2 << 29;
}
if (dd->ipath_kregbase)
writel(pa, tidp32);
mmiowb();
}
/**
* ipath_pe_clear_tid - clear all TID entries for a port, expected and eager
@ -1203,7 +1277,7 @@ int __attribute__((weak)) ipath_unordered_wc(void)
/**
* ipath_init_pe_get_base_info - set chip-specific flags for user code
* @dd: the infinipath device
* @pd: the infinipath port
* @kbase: ipath_base_info pointer
*
* We set the PCIE flag because the lower bandwidth on PCIe vs
@ -1212,6 +1286,7 @@ int __attribute__((weak)) ipath_unordered_wc(void)
static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
{
struct ipath_base_info *kinfo = kbase;
struct ipath_devdata *dd;
if (ipath_unordered_wc()) {
kinfo->spi_runtime_flags |= IPATH_RUNTIME_FORCE_WC_ORDER;
@ -1220,8 +1295,20 @@ static int ipath_pe_get_base_info(struct ipath_portdata *pd, void *kbase)
else
ipath_cdbg(PROC, "Not Intel processor, WC ordered\n");
kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE;
if (pd == NULL)
goto done;
dd = pd->port_dd;
if (dd != NULL && dd->ipath_minrev >= 2) {
ipath_cdbg(PROC, "IBA6120 Rev2, allow multiple PBC write\n");
kinfo->spi_runtime_flags |= IPATH_RUNTIME_PBC_REWRITE;
ipath_cdbg(PROC, "IBA6120 Rev2, allow loose DMA alignment\n");
kinfo->spi_runtime_flags |= IPATH_RUNTIME_LOOSE_DMA_ALIGN;
}
done:
kinfo->spi_runtime_flags |= IPATH_RUNTIME_PCIE;
return 0;
}
@ -1244,7 +1331,10 @@ void ipath_init_iba6120_funcs(struct ipath_devdata *dd)
dd->ipath_f_quiet_serdes = ipath_pe_quiet_serdes;
dd->ipath_f_bringup_serdes = ipath_pe_bringup_serdes;
dd->ipath_f_clear_tids = ipath_pe_clear_tids;
dd->ipath_f_put_tid = ipath_pe_put_tid;
if (dd->ipath_minrev >= 2)
dd->ipath_f_put_tid = ipath_pe_put_tid_2;
else
dd->ipath_f_put_tid = ipath_pe_put_tid;
dd->ipath_f_cleanup = ipath_setup_pe_cleanup;
dd->ipath_f_setextled = ipath_setup_pe_setextled;
dd->ipath_f_get_base_info = ipath_pe_get_base_info;

88
drivers/infiniband/hw/ipath/ipath_intr.c
View File

@ -808,7 +808,7 @@ irqreturn_t ipath_intr(int irq, void *data, struct pt_regs *regs)
if (oldhead != curtail) {
if (dd->ipath_flags & IPATH_GPIO_INTR) {
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear,
(u64) (1 << 2));
(u64) (1 << IPATH_GPIO_PORT0_BIT));
istat = port0rbits | INFINIPATH_I_GPIO;
}
else
@ -867,26 +867,80 @@ irqreturn_t ipath_intr(int irq, void *data, struct pt_regs *regs)
if (istat & INFINIPATH_I_GPIO) {
/*
* Packets are available in the port 0 rcv queue.
* Eventually this needs to be generalized to check
* IPATH_GPIO_INTR, and the specific GPIO bit, if
* GPIO interrupts are used for anything else.
* GPIO interrupts fall in two broad classes:
* GPIO_2 indicates (on some HT4xx boards) that a packet
* has arrived for Port 0. Checking for this
* is controlled by flag IPATH_GPIO_INTR.
* GPIO_3..5 on IBA6120 Rev2 chips indicate errors
* that we need to count. Checking for this
* is controlled by flag IPATH_GPIO_ERRINTRS.
*/
if (unlikely(!(dd->ipath_flags & IPATH_GPIO_INTR))) {
u32 gpiostatus;
gpiostatus = ipath_read_kreg32(
dd, dd->ipath_kregs->kr_gpio_status);
ipath_dbg("Unexpected GPIO interrupt bits %x\n",
gpiostatus);
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear,
gpiostatus);
u32 gpiostatus;
u32 to_clear = 0;
gpiostatus = ipath_read_kreg32(
dd, dd->ipath_kregs->kr_gpio_status);
/* First the error-counter case.
*/
if ((gpiostatus & IPATH_GPIO_ERRINTR_MASK) &&
(dd->ipath_flags & IPATH_GPIO_ERRINTRS)) {
/* want to clear the bits we see asserted. */
to_clear |= (gpiostatus & IPATH_GPIO_ERRINTR_MASK);
/*
* Count appropriately, clear bits out of our copy,
* as they have been "handled".
*/
if (gpiostatus & (1 << IPATH_GPIO_RXUVL_BIT)) {
ipath_dbg("FlowCtl on UnsupVL\n");
dd->ipath_rxfc_unsupvl_errs++;
}
if (gpiostatus & (1 << IPATH_GPIO_OVRUN_BIT)) {
ipath_dbg("Overrun Threshold exceeded\n");
dd->ipath_overrun_thresh_errs++;
}
if (gpiostatus & (1 << IPATH_GPIO_LLI_BIT)) {
ipath_dbg("Local Link Integrity error\n");
dd->ipath_lli_errs++;
}
gpiostatus &= ~IPATH_GPIO_ERRINTR_MASK;
}
else {
/* Clear GPIO status bit 2 */
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear,
(u64) (1 << 2));
/* Now the Port0 Receive case */
if ((gpiostatus & (1 << IPATH_GPIO_PORT0_BIT)) &&
(dd->ipath_flags & IPATH_GPIO_INTR)) {
/*
* GPIO status bit 2 is set, and we expected it.
* clear it and indicate in p0bits.
* This probably only happens if a Port0 pkt
* arrives at _just_ the wrong time, and we
* handle that by seting chk0rcv;
*/
to_clear |= (1 << IPATH_GPIO_PORT0_BIT);
gpiostatus &= ~(1 << IPATH_GPIO_PORT0_BIT);
chk0rcv = 1;
}
if (unlikely(gpiostatus)) {
/*
* Some unexpected bits remain. If they could have
* caused the interrupt, complain and clear.
* MEA: this is almost certainly non-ideal.
* we should look into auto-disable of unexpected
* GPIO interrupts, possibly on a "three strikes"
* basis.
*/
u32 mask;
mask = ipath_read_kreg32(
dd, dd->ipath_kregs->kr_gpio_mask);
if (mask & gpiostatus) {
ipath_dbg("Unexpected GPIO IRQ bits %x\n",
gpiostatus & mask);
to_clear |= (gpiostatus & mask);
}
}
if (to_clear) {
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_clear,
(u64) to_clear);
}
}
chk0rcv |= istat & port0rbits;

18
drivers/infiniband/hw/ipath/ipath_kernel.h
View File

@ -524,6 +524,15 @@ struct ipath_devdata {
u32 ipath_lli_counter;
/* local link integrity errors */
u32 ipath_lli_errors;
/*
* Above counts only cases where _successive_ LocalLinkIntegrity
* errors were seen in the receive headers of kern-packets.
* Below are the three (monotonically increasing) counters
* maintained via GPIO interrupts on iba6120-rev2.
*/
u32 ipath_rxfc_unsupvl_errs;
u32 ipath_overrun_thresh_errs;
u32 ipath_lli_errs;
};
/* Private data for file operations */
@ -636,6 +645,15 @@ int ipath_set_rx_pol_inv(struct ipath_devdata *dd, u8 new_pol_inv);
/* can miss port0 rx interrupts */
#define IPATH_POLL_RX_INTR 0x40000
#define IPATH_DISABLED 0x80000 /* administratively disabled */
/* Use GPIO interrupts for new counters */
#define IPATH_GPIO_ERRINTRS 0x100000
/* Bits in GPIO for the added interrupts */
#define IPATH_GPIO_PORT0_BIT 2
#define IPATH_GPIO_RXUVL_BIT 3
#define IPATH_GPIO_OVRUN_BIT 4
#define IPATH_GPIO_LLI_BIT 5
#define IPATH_GPIO_ERRINTR_MASK 0x38
/* portdata flag bit offsets */
/* waiting for a packet to arrive */

28
drivers/infiniband/hw/ipath/ipath_verbs.c
View File

@ -898,7 +898,8 @@ int ipath_get_counters(struct ipath_devdata *dd,
ipath_snap_cntr(dd, dd->ipath_cregs->cr_erricrccnt) +
ipath_snap_cntr(dd, dd->ipath_cregs->cr_errvcrccnt) +
ipath_snap_cntr(dd, dd->ipath_cregs->cr_errlpcrccnt) +
ipath_snap_cntr(dd, dd->ipath_cregs->cr_badformatcnt);
ipath_snap_cntr(dd, dd->ipath_cregs->cr_badformatcnt) +
dd->ipath_rxfc_unsupvl_errs;
cntrs->port_rcv_remphys_errors =
ipath_snap_cntr(dd, dd->ipath_cregs->cr_rcvebpcnt);
cntrs->port_xmit_discards =
@ -911,8 +912,10 @@ int ipath_get_counters(struct ipath_devdata *dd,
ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktsendcnt);
cntrs->port_rcv_packets =
ipath_snap_cntr(dd, dd->ipath_cregs->cr_pktrcvcnt);
cntrs->local_link_integrity_errors = dd->ipath_lli_errors;
cntrs->excessive_buffer_overrun_errors = 0; /* XXX */
cntrs->local_link_integrity_errors =
(dd->ipath_flags & IPATH_GPIO_ERRINTRS) ?
dd->ipath_lli_errs : dd->ipath_lli_errors;
cntrs->excessive_buffer_overrun_errors = dd->ipath_overrun_thresh_errs;
ret = 0;
@ -1380,11 +1383,13 @@ static int enable_timer(struct ipath_devdata *dd)
* processing.
*/
if (dd->ipath_flags & IPATH_GPIO_INTR) {
u64 val;
ipath_write_kreg(dd, dd->ipath_kregs->kr_debugportselect,
0x2074076542310ULL);
/* Enable GPIO bit 2 interrupt */
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask,
(u64) (1 << 2));
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_gpio_mask);
val |= (u64) (1 << IPATH_GPIO_PORT0_BIT);
ipath_write_kreg( dd, dd->ipath_kregs->kr_gpio_mask, val);
}
init_timer(&dd->verbs_timer);
@ -1399,8 +1404,17 @@ static int enable_timer(struct ipath_devdata *dd)
static int disable_timer(struct ipath_devdata *dd)
{
/* Disable GPIO bit 2 interrupt */
if (dd->ipath_flags & IPATH_GPIO_INTR)
ipath_write_kreg(dd, dd->ipath_kregs->kr_gpio_mask, 0);
if (dd->ipath_flags & IPATH_GPIO_INTR) {
u64 val;
/* Disable GPIO bit 2 interrupt */
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_gpio_mask);
val &= ~((u64) (1 << IPATH_GPIO_PORT0_BIT));
ipath_write_kreg( dd, dd->ipath_kregs->kr_gpio_mask, val);
/*
* We might want to undo changes to debugportselect,
* but how?
*/
}
del_timer_sync(&dd->verbs_timer);