- 根目录:
- drivers
- infiniband
- hw
- qib
- qib_init.c
/*
* Copyright (c) 2006, 2007, 2008, 2009, 2010 QLogic Corporation.
* All rights reserved.
* Copyright (c) 2003, 2004, 2005, 2006 PathScale, Inc. All rights reserved.
*
* This software is available to you under a choice of one of two
* licenses. You may choose to be licensed under the terms of the GNU
* General Public License (GPL) Version 2, available from the file
* COPYING in the main directory of this source tree, or the
* OpenIB.org BSD license below:
*
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the following
* conditions are met:
*
* - Redistributions of source code must retain the above
* copyright notice, this list of conditions and the following
* disclaimer.
*
* - Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials
* provided with the distribution.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <linux/pci.h>
#include <linux/netdevice.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/idr.h>
#include <linux/module.h>
#include "qib.h"
#include "qib_common.h"
/*
* min buffers we want to have per context, after driver
*/
#define QIB_MIN_USER_CTXT_BUFCNT 7
#define QLOGIC_IB_R_SOFTWARE_MASK 0xFF
#define QLOGIC_IB_R_SOFTWARE_SHIFT 24
#define QLOGIC_IB_R_EMULATOR_MASK (1ULL<<62)
/*
* Number of ctxts we are configured to use (to allow for more pio
* buffers per ctxt, etc.) Zero means use chip value.
*/
ushort qib_cfgctxts;
module_param_named(cfgctxts, qib_cfgctxts, ushort, S_IRUGO);
MODULE_PARM_DESC(cfgctxts, "Set max number of contexts to use");
/*
* If set, do not write to any regs if avoidable, hack to allow
* check for deranged default register values.
*/
ushort qib_mini_init;
module_param_named(mini_init, qib_mini_init, ushort, S_IRUGO);
MODULE_PARM_DESC(mini_init, "If set, do minimal diag init");
unsigned qib_n_krcv_queues;
module_param_named(krcvqs, qib_n_krcv_queues, uint, S_IRUGO);
MODULE_PARM_DESC(krcvqs, "number of kernel receive queues per IB port");
/*
* qib_wc_pat parameter:
* 0 is WC via MTRR
* 1 is WC via PAT
* If PAT initialization fails, code reverts back to MTRR
*/
unsigned qib_wc_pat = 1; /* default (1) is to use PAT, not MTRR */
module_param_named(wc_pat, qib_wc_pat, uint, S_IRUGO);
MODULE_PARM_DESC(wc_pat, "enable write-combining via PAT mechanism");
struct workqueue_struct *qib_cq_wq;
static void verify_interrupt(unsigned long);
static struct idr qib_unit_table;
u32 qib_cpulist_count;
unsigned long *qib_cpulist;
/* set number of contexts we'll actually use */
void qib_set_ctxtcnt(struct qib_devdata *dd)
{
if (!qib_cfgctxts) {
dd->cfgctxts = dd->first_user_ctxt + num_online_cpus();
if (dd->cfgctxts > dd->ctxtcnt)
dd->cfgctxts = dd->ctxtcnt;
} else if (qib_cfgctxts < dd->num_pports)
dd->cfgctxts = dd->ctxtcnt;
else if (qib_cfgctxts <= dd->ctxtcnt)
dd->cfgctxts = qib_cfgctxts;
else
dd->cfgctxts = dd->ctxtcnt;
}
/*
* Common code for creating the receive context array.
*/
int qib_create_ctxts(struct qib_devdata *dd)
{
unsigned i;
int ret;
/*
* Allocate full ctxtcnt array, rather than just cfgctxts, because
* cleanup iterates across all possible ctxts.
*/
dd->rcd = kzalloc(sizeof(*dd->rcd) * dd->ctxtcnt, GFP_KERNEL);
if (!dd->rcd) {
qib_dev_err(dd, "Unable to allocate ctxtdata array, "
"failing\n");
ret = -ENOMEM;
goto done;
}
/* create (one or more) kctxt */
for (i = 0; i < dd->first_user_ctxt; ++i) {
struct qib_pportdata *ppd;
struct qib_ctxtdata *rcd;
if (dd->skip_kctxt_mask & (1 << i))
continue;
ppd = dd->pport + (i % dd->num_pports);
rcd = qib_create_ctxtdata(ppd, i);
if (!rcd) {
qib_dev_err(dd, "Unable to allocate ctxtdata"
" for Kernel ctxt, failing\n");
ret = -ENOMEM;
goto done;
}
rcd->pkeys[0] = QIB_DEFAULT_P_KEY;
rcd->seq_cnt = 1;
}
ret = 0;
done:
return ret;
}
/*
* Common code for user and kernel context setup.
*/
struct qib_ctxtdata *qib_create_ctxtdata(struct qib_pportdata *ppd, u32 ctxt)
{
struct qib_devdata *dd = ppd->dd;
struct qib_ctxtdata *rcd;
rcd = kzalloc(sizeof(*rcd), GFP_KERNEL);
if (rcd) {
INIT_LIST_HEAD(&rcd->qp_wait_list);
rcd->ppd = ppd;
rcd->dd = dd;
rcd->cnt = 1;
rcd->ctxt = ctxt;
dd->rcd[ctxt] = rcd;
dd->f_init_ctxt(rcd);
/*
* To avoid wasting a lot of memory, we allocate 32KB chunks
* of physically contiguous memory, advance through it until
* used up and then allocate more. Of course, we need
* memory to store those extra pointers, now. 32KB seems to
* be the most that is "safe" under memory pressure
* (creating large files and then copying them over
* NFS while doing lots of MPI jobs). The OOM killer can
* get invoked, even though we say we can sleep and this can
* cause significant system problems....
*/
rcd->rcvegrbuf_size = 0x8000;
rcd->rcvegrbufs_perchunk =
rcd->rcvegrbuf_size / dd->rcvegrbufsize;
rcd->rcvegrbuf_chunks = (rcd->rcvegrcnt +
rcd->rcvegrbufs_perchunk - 1) /
rcd->rcvegrbufs_perchunk;
BUG_ON(!is_power_of_2(rcd->rcvegrbufs_perchunk));
rcd->rcvegrbufs_perchunk_shift =
ilog2(rcd->rcvegrbufs_perchunk);
}
return rcd;
}
/*
* Common code for initializing the physical port structure.
*/
void qib_init_pportdata(struct qib_pportdata *ppd, struct qib_devdata *dd,
u8 hw_pidx, u8 port)
{
ppd->dd = dd;
ppd->hw_pidx = hw_pidx;
ppd->port = port; /* IB port number, not index */
spin_lock_init(&ppd->sdma_lock);
spin_lock_init(&ppd->lflags_lock);
init_waitqueue_head(&ppd->state_wait);
init_timer(&ppd->symerr_clear_timer);
ppd->symerr_clear_timer.function = qib_clear_symerror_on_linkup;
ppd->symerr_clear_timer.data = (unsigned long)ppd;
}
static int init_pioavailregs(struct qib_devdata *dd)
{
int ret, pidx;
u64 *status_page;
dd->pioavailregs_dma = dma_alloc_coherent(
&dd->pcidev->dev, PAGE_SIZE, &dd->pioavailregs_phys,
GFP_KERNEL);
if (!dd->pioavailregs_dma) {
qib_dev_err(dd, "failed to allocate PIOavail reg area "
"in memory\n");
ret = -ENOMEM;
goto done;
}
/*
* We really want L2 cache aligned, but for current CPUs of
* interest, they are the same.
*/
status_page = (u64 *)
((char *) dd->pioavailregs_dma +
((2 * L1_CACHE_BYTES +
dd->pioavregs * sizeof(u64)) & ~L1_CACHE_BYTES));
/* device status comes first, for backwards compatibility */
dd->devstatusp = status_page;
*status_page++ = 0;
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
dd->pport[pidx].statusp = status_page;
*status_page++ = 0;
}
/*
* Setup buffer to hold freeze and other messages, accessible to
* apps, following statusp. This is per-unit, not per port.
*/
dd->freezemsg = (char *) status_page;
*dd->freezemsg = 0;
/* length of msg buffer is "whatever is left" */
ret = (char *) status_page - (char *) dd->pioavailregs_dma;
dd->freezelen = PAGE_SIZE - ret;
ret = 0;
done:
return ret;
}
/**
* init_shadow_tids - allocate the shadow TID array
* @dd: the qlogic_ib device
*
* allocate the shadow TID array, so we can qib_munlock previous
* entries. It may make more sense to move the pageshadow to the
* ctxt data structure, so we only allocate memory for ctxts actually
* in use, since we at 8k per ctxt, now.
* We don't want failures here to prevent use of the driver/chip,
* so no return value.
*/
static void init_shadow_tids(struct qib_devdata *dd)
{
struct page **pages;
dma_addr_t *addrs;
pages = vzalloc(dd->cfgctxts * dd->rcvtidcnt * sizeof(struct page *));
if (!pages) {
qib_dev_err(dd, "failed to allocate shadow page * "
"array, no expected sends!\n");
goto bail;
}
addrs = vzalloc(dd->cfgctxts * dd->rcvtidcnt * sizeof(dma_addr_t));
if (!addrs) {
qib_dev_err(dd, "failed to allocate shadow dma handle "
"array, no expected sends!\n");
goto bail_free;
}
dd->pageshadow = pages;
dd->physshadow = addrs;
return;
bail_free:
vfree(pages);
bail:
dd->pageshadow = NULL;
}
/*
* Do initialization for device that is only needed on
* first detect, not on resets.
*/
static int loadtime_init(struct qib_devdata *dd)
{
int ret = 0;
if (((dd->revision >> QLOGIC_IB_R_SOFTWARE_SHIFT) &
QLOGIC_IB_R_SOFTWARE_MASK) != QIB_CHIP_SWVERSION) {
qib_dev_err(dd, "Driver only handles version %d, "
"chip swversion is %d (%llx), failng\n",
QIB_CHIP_SWVERSION,
(int)(dd->revision >>
QLOGIC_IB_R_SOFTWARE_SHIFT) &
QLOGIC_IB_R_SOFTWARE_MASK,
(unsigned long long) dd->revision);
ret = -ENOSYS;
goto done;
}
if (dd->revision & QLOGIC_IB_R_EMULATOR_MASK)
qib_devinfo(dd->pcidev, "%s", dd->boardversion);
spin_lock_init(&dd->pioavail_lock);
spin_lock_init(&dd->sendctrl_lock);
spin_lock_init(&dd->uctxt_lock);
spin_lock_init(&dd->qib_diag_trans_lock);
spin_lock_init(&dd->eep_st_lock);
mutex_init(&dd->eep_lock);
if (qib_mini_init)
goto done;
ret = init_pioavailregs(dd);
init_shadow_tids(dd);
qib_get_eeprom_info(dd);
/* setup time (don't start yet) to verify we got interrupt */
init_timer(&dd->intrchk_timer);
dd->intrchk_timer.function = verify_interrupt;
dd->intrchk_timer.data = (unsigned long) dd;
done:
return ret;
}
/**
* init_after_reset - re-initialize after a reset
* @dd: the qlogic_ib device
*
* sanity check at least some of the values after reset, and
* ensure no receive or transmit (explicitly, in case reset
* failed
*/
static int init_after_reset(struct qib_devdata *dd)
{
int i;
/*
* Ensure chip does no sends or receives, tail updates, or
* pioavail updates while we re-initialize. This is mostly
* for the driver data structures, not chip registers.
*/
for (i = 0; i < dd->num_pports; ++i) {
/*
* ctxt == -1 means "all contexts". Only really safe for
* _dis_abling things, as here.
*/
dd->f_rcvctrl(dd->pport + i, QIB_RCVCTRL_CTXT_DIS |
QIB_RCVCTRL_INTRAVAIL_DIS |
QIB_RCVCTRL_TAILUPD_DIS, -1);
/* Redundant across ports for some, but no big deal. */
dd->f_sendctrl(dd->pport + i, QIB_SENDCTRL_SEND_DIS |
QIB_SENDCTRL_AVAIL_DIS);
}
return 0;
}
static void enable_chip(struct qib_devdata *dd)
{
u64 rcvmask;
int i;
/*
* Enable PIO send, and update of PIOavail regs to memory.
*/
for (i = 0; i < dd->num_pports; ++i)
dd->f_sendctrl(dd->pport + i, QIB_SENDCTRL_SEND_ENB |
QIB_SENDCTRL_AVAIL_ENB);
/*
* Enable kernel ctxts' receive and receive interrupt.
* Other ctxts done as user opens and inits them.
*/
rcvmask = QIB_RCVCTRL_CTXT_ENB | QIB_RCVCTRL_INTRAVAIL_ENB;
rcvmask |= (dd->flags & QIB_NODMA_RTAIL) ?
QIB_RCVCTRL_TAILUPD_DIS : QIB_RCVCTRL_TAILUPD_ENB;
for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
struct qib_ctxtdata *rcd = dd->rcd[i];
if (rcd)
dd->f_rcvctrl(rcd->ppd, rcvmask, i);
}
dd->freectxts = dd->cfgctxts - dd->first_user_ctxt;
}
static void verify_interrupt(unsigned long opaque)
{
struct qib_devdata *dd = (struct qib_devdata *) opaque;
if (!dd)
return; /* being torn down */
/*
* If we don't have a lid or any interrupts, let the user know and
* don't bother checking again.
*/
if (dd->int_counter == 0) {
if (!dd->f_intr_fallback(dd))
dev_err(&dd->pcidev->dev, "No interrupts detected, "
"not usable.\n");
else /* re-arm the timer to see if fallback works */
mod_timer(&dd->intrchk_timer, jiffies + HZ/2);
}
}
static void init_piobuf_state(struct qib_devdata *dd)
{
int i, pidx;
u32 uctxts;
/*
* Ensure all buffers are free, and fifos empty. Buffers
* are common, so only do once for port 0.
*
* After enable and qib_chg_pioavailkernel so we can safely
* enable pioavail updates and PIOENABLE. After this, packets
* are ready and able to go out.
*/
dd->f_sendctrl(dd->pport, QIB_SENDCTRL_DISARM_ALL);
for (pidx = 0; pidx < dd->num_pports; ++pidx)
dd->f_sendctrl(dd->pport + pidx, QIB_SENDCTRL_FLUSH);
/*
* If not all sendbufs are used, add the one to each of the lower
* numbered contexts. pbufsctxt and lastctxt_piobuf are
* calculated in chip-specific code because it may cause some
* chip-specific adjustments to be made.
*/
uctxts = dd->cfgctxts - dd->first_user_ctxt;
dd->ctxts_extrabuf = dd->pbufsctxt ?
dd->lastctxt_piobuf - (dd->pbufsctxt * uctxts) : 0;
/*
* Set up the shadow copies of the piobufavail registers,
* which we compare against the chip registers for now, and
* the in memory DMA'ed copies of the registers.
* By now pioavail updates to memory should have occurred, so
* copy them into our working/shadow registers; this is in
* case something went wrong with abort, but mostly to get the
* initial values of the generation bit correct.
*/
for (i = 0; i < dd->pioavregs; i++) {
__le64 tmp;
tmp = dd->pioavailregs_dma[i];
/*
* Don't need to worry about pioavailkernel here
* because we will call qib_chg_pioavailkernel() later
* in initialization, to busy out buffers as needed.
*/
dd->pioavailshadow[i] = le64_to_cpu(tmp);
}
while (i < ARRAY_SIZE(dd->pioavailshadow))
dd->pioavailshadow[i++] = 0; /* for debugging sanity */
/* after pioavailshadow is setup */
qib_chg_pioavailkernel(dd, 0, dd->piobcnt2k + dd->piobcnt4k,
TXCHK_CHG_TYPE_KERN, NULL);
dd->f_initvl15_bufs(dd);
}
/**
* qib_init - do the actual initialization sequence on the chip
* @dd: the qlogic_ib device
* @reinit: reinitializing, so don't allocate new memory
*
* Do the actual initialization sequence on the chip. This is done
* both from the init routine called from the PCI infrastructure, and
* when we reset the chip, or detect that it was reset internally,
* or it's administratively re-enabled.
*
* Memory allocation here and in called routines is only done in
* the first case (reinit == 0). We have to be careful, because even
* without memory allocation, we need to re-write all the chip registers
* TIDs, etc. after the reset or enable has completed.
*/
int qib_init(struct qib_devdata *dd, int reinit)
{
int ret = 0, pidx, lastfail = 0;
u32 portok = 0;
unsigned i;
struct qib_ctxtdata *rcd;
struct qib_pportdata *ppd;
unsigned long flags;
/* Set linkstate to unknown, so we can watch for a transition. */
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags &= ~(QIBL_LINKACTIVE | QIBL_LINKARMED |
QIBL_LINKDOWN | QIBL_LINKINIT |
QIBL_LINKV);
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
}
if (reinit)
ret = init_after_reset(dd);
else
ret = loadtime_init(dd);
if (ret)
goto done;
/* Bypass most chip-init, to get to device creation */
if (qib_mini_init)
return 0;
ret = dd->f_late_initreg(dd);
if (ret)
goto done;
/* dd->rcd can be NULL if early init failed */
for (i = 0; dd->rcd && i < dd->first_user_ctxt; ++i) {
/*
* Set up the (kernel) rcvhdr queue and egr TIDs. If doing
* re-init, the simplest way to handle this is to free
* existing, and re-allocate.
* Need to re-create rest of ctxt 0 ctxtdata as well.
*/
rcd = dd->rcd[i];
if (!rcd)
continue;
lastfail = qib_create_rcvhdrq(dd, rcd);
if (!lastfail)
lastfail = qib_setup_eagerbufs(rcd);
if (lastfail) {
qib_dev_err(dd, "failed to allocate kernel ctxt's "
"rcvhdrq and/or egr bufs\n");
continue;
}
}
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
int mtu;
if (lastfail)
ret = lastfail;
ppd = dd->pport + pidx;
mtu = ib_mtu_enum_to_int(qib_ibmtu);
if (mtu == -1) {
mtu = QIB_DEFAULT_MTU;
qib_ibmtu = 0; /* don't leave invalid value */
}
/* set max we can ever have for this driver load */
ppd->init_ibmaxlen = min(mtu > 2048 ?
dd->piosize4k : dd->piosize2k,
dd->rcvegrbufsize +
(dd->rcvhdrentsize << 2));
/*
* Have to initialize ibmaxlen, but this will normally
* change immediately in qib_set_mtu().
*/
ppd->ibmaxlen = ppd->init_ibmaxlen;
qib_set_mtu(ppd, mtu);
spin_lock_irqsave(&ppd->lflags_lock, flags);
ppd->lflags |= QIBL_IB_LINK_DISABLED;
spin_unlock_irqrestore(&ppd->lflags_lock, flags);
lastfail = dd->f_bringup_serdes(ppd);
if (lastfail) {
qib_devinfo(dd->pcidev,
"Failed to bringup IB port %u\n", ppd->port);
lastfail = -ENETDOWN;
continue;
}
portok++;
}
if (!portok) {
/* none of the ports initialized */
if (!ret && lastfail)
ret = lastfail;
else if (!ret)
ret = -ENETDOWN;
/* but continue on, so we can debug cause */
}
enable_chip(dd);
init_piobuf_state(dd);
done:
if (!ret) {
/* chip is OK for user apps; mark it as initialized */
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
/*
* Set status even if port serdes is not initialized
* so that diags will work.
*/
*ppd->statusp |= QIB_STATUS_CHIP_PRESENT |
QIB_STATUS_INITTED;
if (!ppd->link_speed_enabled)
continue;
if (dd->flags & QIB_HAS_SEND_DMA)
ret = qib_setup_sdma(ppd);
init_timer(&ppd->hol_timer);
ppd->hol_timer.function = qib_hol_event;
ppd->hol_timer.data = (unsigned long)ppd;
ppd->hol_state = QIB_HOL_UP;
}
/* now we can enable all interrupts from the chip */
dd->f_set_intr_state(dd, 1);
/*
* Setup to verify we get an interrupt, and fallback
* to an alternate if necessary and possible.
*/
mod_timer(&dd->intrchk_timer, jiffies + HZ/2);
/* start stats retrieval timer */
mod_timer(&dd->stats_timer, jiffies + HZ * ACTIVITY_TIMER);
}
/* if ret is non-zero, we probably should do some cleanup here... */
return ret;
}
/*
* These next two routines are placeholders in case we don't have per-arch
* code for controlling write combining. If explicit control of write
* combining is not available, performance will probably be awful.
*/
int __attribute__((weak)) qib_enable_wc(struct qib_devdata *dd)
{
return -EOPNOTSUPP;
}
void __attribute__((weak)) qib_disable_wc(struct qib_devdata *dd)
{
}
static inline struct qib_devdata *__qib_lookup(int unit)
{
return idr_find(&qib_unit_table, unit);
}
struct qib_devdata *qib_lookup(int unit)
{
struct qib_devdata *dd;
unsigned long flags;
spin_lock_irqsave(&qib_devs_lock, flags);
dd = __qib_lookup(unit);
spin_unlock_irqrestore(&qib_devs_lock, flags);
return dd;
}
/*
* Stop the timers during unit shutdown, or after an error late
* in initialization.
*/
static void qib_stop_timers(struct qib_devdata *dd)
{
struct qib_pportdata *ppd;
int pidx;
if (dd->stats_timer.data) {
del_timer_sync(&dd->stats_timer);
dd->stats_timer.data = 0;
}
if (dd->intrchk_timer.data) {
del_timer_sync(&dd->intrchk_timer);
dd->intrchk_timer.data = 0;
}
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
if (ppd->hol_timer.data)
del_timer_sync(&ppd->hol_timer);
if (ppd->led_override_timer.data) {
del_timer_sync(&ppd->led_override_timer);
atomic_set(&ppd->led_override_timer_active, 0);
}
if (ppd->symerr_clear_timer.data)
del_timer_sync(&ppd->symerr_clear_timer);
}
}
/**
* qib_shutdown_device - shut down a device
* @dd: the qlogic_ib device
*
* This is called to make the device quiet when we are about to
* unload the driver, and also when the device is administratively
* disabled. It does not free any data structures.
* Everything it does has to be setup again by qib_init(dd, 1)
*/
static void qib_shutdown_device(struct qib_devdata *dd)
{
struct qib_pportdata *ppd;
unsigned pidx;
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
spin_lock_irq(&ppd->lflags_lock);
ppd->lflags &= ~(QIBL_LINKDOWN | QIBL_LINKINIT |
QIBL_LINKARMED | QIBL_LINKACTIVE |
QIBL_LINKV);
spin_unlock_irq(&ppd->lflags_lock);
*ppd->statusp &= ~(QIB_STATUS_IB_CONF | QIB_STATUS_IB_READY);
}
dd->flags &= ~QIB_INITTED;
/* mask interrupts, but not errors */
dd->f_set_intr_state(dd, 0);
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
dd->f_rcvctrl(ppd, QIB_RCVCTRL_TAILUPD_DIS |
QIB_RCVCTRL_CTXT_DIS |
QIB_RCVCTRL_INTRAVAIL_DIS |
QIB_RCVCTRL_PKEY_ENB, -1);
/*
* Gracefully stop all sends allowing any in progress to
* trickle out first.
*/
dd->f_sendctrl(ppd, QIB_SENDCTRL_CLEAR);
}
/*
* Enough for anything that's going to trickle out to have actually
* done so.
*/
udelay(20);
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
ppd = dd->pport + pidx;
dd->f_setextled(ppd, 0); /* make sure LEDs are off */
if (dd->flags & QIB_HAS_SEND_DMA)
qib_teardown_sdma(ppd);
dd->f_sendctrl(ppd, QIB_SENDCTRL_AVAIL_DIS |
QIB_SENDCTRL_SEND_DIS);
/*
* Clear SerdesEnable.
* We can't count on interrupts since we are stopping.
*/
dd->f_quiet_serdes(ppd);
}
qib_update_eeprom_log(dd);
}
/**
* qib_free_ctxtdata - free a context's allocated data
* @dd: the qlogic_ib device
* @rcd: the ctxtdata structure
*
* free up any allocated data for a context
* This should not touch anything that would affect a simultaneous
* re-allocation of context data, because it is called after qib_mutex
* is released (and can be called from reinit as well).
* It should never change any chip state, or global driver state.
*/
void qib_free_ctxtdata(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
{
if (!rcd)
return;
if (rcd->rcvhdrq) {
dma_free_coherent(&dd->pcidev->dev, rcd->rcvhdrq_size,
rcd->rcvhdrq, rcd->rcvhdrq_phys);
rcd->rcvhdrq = NULL;
if (rcd->rcvhdrtail_kvaddr) {
dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
rcd->rcvhdrtail_kvaddr,
rcd->rcvhdrqtailaddr_phys);
rcd->rcvhdrtail_kvaddr = NULL;
}
}
if (rcd->rcvegrbuf) {
unsigned e;
for (e = 0; e < rcd->rcvegrbuf_chunks; e++) {
void *base = rcd->rcvegrbuf[e];
size_t size = rcd->rcvegrbuf_size;
dma_free_coherent(&dd->pcidev->dev, size,
base, rcd->rcvegrbuf_phys[e]);
}
kfree(rcd->rcvegrbuf);
rcd->rcvegrbuf = NULL;
kfree(rcd->rcvegrbuf_phys);
rcd->rcvegrbuf_phys = NULL;
rcd->rcvegrbuf_chunks = 0;
}
kfree(rcd->tid_pg_list);
vfree(rcd->user_event_mask);
vfree(rcd->subctxt_uregbase);
vfree(rcd->subctxt_rcvegrbuf);
vfree(rcd->subctxt_rcvhdr_base);
kfree(rcd);
}
/*
* Perform a PIO buffer bandwidth write test, to verify proper system
* configuration. Even when all the setup calls work, occasionally
* BIOS or other issues can prevent write combining from working, or
* can cause other bandwidth problems to the chip.
*
* This test simply writes the same buffer over and over again, and
* measures close to the peak bandwidth to the chip (not testing
* data bandwidth to the wire). On chips that use an address-based
* trigger to send packets to the wire, this is easy. On chips that
* use a count to trigger, we want to make sure that the packet doesn't
* go out on the wire, or trigger flow control checks.
*/
static void qib_verify_pioperf(struct qib_devdata *dd)
{
u32 pbnum, cnt, lcnt;
u32 __iomem *piobuf;
u32 *addr;
u64 msecs, emsecs;
piobuf = dd->f_getsendbuf(dd->pport, 0ULL, &pbnum);
if (!piobuf) {
qib_devinfo(dd->pcidev,
"No PIObufs for checking perf, skipping\n");
return;
}
/*
* Enough to give us a reasonable test, less than piobuf size, and
* likely multiple of store buffer length.
*/
cnt = 1024;
addr = vmalloc(cnt);
if (!addr) {
qib_devinfo(dd->pcidev,
"Couldn't get memory for checking PIO perf,"
" skipping\n");
goto done;
}
preempt_disable(); /* we want reasonably accurate elapsed time */
msecs = 1 + jiffies_to_msecs(jiffies);
for (lcnt = 0; lcnt < 10000U; lcnt++) {
/* wait until we cross msec boundary */
if (jiffies_to_msecs(jiffies) >= msecs)
break;
udelay(1);
}
dd->f_set_armlaunch(dd, 0);
/*
* length 0, no dwords actually sent
*/
writeq(0, piobuf);
qib_flush_wc();
/*
* This is only roughly accurate, since even with preempt we
* still take interrupts that could take a while. Running for
* >= 5 msec seems to get us "close enough" to accurate values.
*/
msecs = jiffies_to_msecs(jiffies);
for (emsecs = lcnt = 0; emsecs <= 5UL; lcnt++) {
qib_pio_copy(piobuf + 64, addr, cnt >> 2);
emsecs = jiffies_to_msecs(jiffies) - msecs;
}
/* 1 GiB/sec, slightly over IB SDR line rate */
if (lcnt < (emsecs * 1024U))
qib_dev_err(dd,
"Performance problem: bandwidth to PIO buffers is "
"only %u MiB/sec\n",
lcnt / (u32) emsecs);
preempt_enable();
vfree(addr);
done:
/* disarm piobuf, so it's available again */
dd->f_sendctrl(dd->pport, QIB_SENDCTRL_DISARM_BUF(pbnum));
qib_sendbuf_done(dd, pbnum);
dd->f_set_armlaunch(dd, 1);
}
void qib_free_devdata(struct qib_devdata *dd)
{
unsigned long flags;
spin_lock_irqsave(&qib_devs_lock, flags);
idr_remove(&qib_unit_table, dd->unit);
list_del(&dd->list);
spin_unlock_irqrestore(&qib_devs_lock, flags);
ib_dealloc_device(&dd->verbs_dev.ibdev);
}
/*
* Allocate our primary per-unit data structure. Must be done via verbs
* allocator, because the verbs cleanup process both does cleanup and
* free of the data structure.
* "extra" is for chip-specific data.
*
* Use the idr mechanism to get a unit number for this unit.
*/
struct qib_devdata *qib_alloc_devdata(struct pci_dev *pdev, size_t extra)
{
unsigned long flags;
struct qib_devdata *dd;
int ret;
if (!idr_pre_get(&qib_unit_table, GFP_KERNEL)) {
dd = ERR_PTR(-ENOMEM);
goto bail;
}
dd = (struct qib_devdata *) ib_alloc_device(sizeof(*dd) + extra);
if (!dd) {
dd = ERR_PTR(-ENOMEM);
goto bail;
}
spin_lock_irqsave(&qib_devs_lock, flags);
ret = idr_get_new(&qib_unit_table, dd, &dd->unit);
if (ret >= 0)
list_add(&dd->list, &qib_dev_list);
spin_unlock_irqrestore(&qib_devs_lock, flags);
if (ret < 0) {
qib_early_err(&pdev->dev,
"Could not allocate unit ID: error %d\n", -ret);
ib_dealloc_device(&dd->verbs_dev.ibdev);
dd = ERR_PTR(ret);
goto bail;
}
if (!qib_cpulist_count) {
u32 count = num_online_cpus();
qib_cpulist = kzalloc(BITS_TO_LONGS(count) *
sizeof(long), GFP_KERNEL);
if (qib_cpulist)
qib_cpulist_count = count;
else
qib_early_err(&pdev->dev, "Could not alloc cpulist "
"info, cpu affinity might be wrong\n");
}
bail:
return dd;
}
/*
* Called from freeze mode handlers, and from PCI error
* reporting code. Should be paranoid about state of
* system and data structures.
*/
void qib_disable_after_error(struct qib_devdata *dd)
{
if (dd->flags & QIB_INITTED) {
u32 pidx;
dd->flags &= ~QIB_INITTED;
if (dd->pport)
for (pidx = 0; pidx < dd->num_pports; ++pidx) {
struct qib_pportdata *ppd;
ppd = dd->pport + pidx;
if (dd->flags & QIB_PRESENT) {
qib_set_linkstate(ppd,
QIB_IB_LINKDOWN_DISABLE);
dd->f_setextled(ppd, 0);
}
*ppd->statusp &= ~QIB_STATUS_IB_READY;
}
}
/*
* Mark as having had an error for driver, and also
* for /sys and status word mapped to user programs.
* This marks unit as not usable, until reset.
*/
if (dd->devstatusp)
*dd->devstatusp |= QIB_STATUS_HWERROR;
}
static void __devexit qib_remove_one(struct pci_dev *);
static int __devinit qib_init_one(struct pci_dev *,
const struct pci_device_id *);
#define DRIVER_LOAD_MSG "QLogic " QIB_DRV_NAME " loaded: "
#define PFX QIB_DRV_NAME ": "
static DEFINE_PCI_DEVICE_TABLE(qib_pci_tbl) = {
{ PCI_DEVICE(PCI_VENDOR_ID_PATHSCALE, PCI_DEVICE_ID_QLOGIC_IB_6120) },
{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_IB_7220) },
{ PCI_DEVICE(PCI_VENDOR_ID_QLOGIC, PCI_DEVICE_ID_QLOGIC_IB_7322) },
{ 0, }
};
MODULE_DEVICE_TABLE(pci, qib_pci_tbl);
struct pci_driver qib_driver = {
.name = QIB_DRV_NAME,
.probe = qib_init_one,
.remove = __devexit_p(qib_remove_one),
.id_table = qib_pci_tbl,
.err_handler = &qib_pci_err_handler,
};
/*
* Do all the generic driver unit- and chip-independent memory
* allocation and initialization.
*/
static int __init qlogic_ib_init(void)
{
int ret;
ret = qib_dev_init();
if (ret)
goto bail;
qib_cq_wq = create_singlethread_workqueue("qib_cq");
if (!qib_cq_wq) {
ret = -ENOMEM;
goto bail_dev;
}
/*
* These must be called before the driver is registered with
* the PCI subsystem.
*/
idr_init(&qib_unit_table);
if (!idr_pre_get(&qib_unit_table, GFP_KERNEL)) {
printk(KERN_ERR QIB_DRV_NAME ": idr_pre_get() failed\n");
ret = -ENOMEM;
goto bail_cq_wq;
}
ret = pci_register_driver(&qib_driver);
if (ret < 0) {
printk(KERN_ERR QIB_DRV_NAME
": Unable to register driver: error %d\n", -ret);
goto bail_unit;
}
/* not fatal if it doesn't work */
if (qib_init_qibfs())
printk(KERN_ERR QIB_DRV_NAME ": Unable to register ipathfs\n");
goto bail; /* all OK */
bail_unit:
idr_destroy(&qib_unit_table);
bail_cq_wq:
destroy_workqueue(qib_cq_wq);
bail_dev:
qib_dev_cleanup();
bail:
return ret;
}
module_init(qlogic_ib_init);
/*
* Do the non-unit driver cleanup, memory free, etc. at unload.
*/
static void __exit qlogic_ib_cleanup(void)
{
int ret;
ret = qib_exit_qibfs();
if (ret)
printk(KERN_ERR QIB_DRV_NAME ": "
"Unable to cleanup counter filesystem: "
"error %d\n", -ret);
pci_unregister_driver(&qib_driver);
destroy_workqueue(qib_cq_wq);
qib_cpulist_count = 0;
kfree(qib_cpulist);
idr_destroy(&qib_unit_table);
qib_dev_cleanup();
}
module_exit(qlogic_ib_cleanup);
/* this can only be called after a successful initialization */
static void cleanup_device_data(struct qib_devdata *dd)
{
int ctxt;
int pidx;
struct qib_ctxtdata **tmp;
unsigned long flags;
/* users can't do anything more with chip */
for (pidx = 0; pidx < dd->num_pports; ++pidx)
if (dd->pport[pidx].statusp)
*dd->pport[pidx].statusp &= ~QIB_STATUS_CHIP_PRESENT;
if (!qib_wc_pat)
qib_disable_wc(dd);
if (dd->pioavailregs_dma) {
dma_free_coherent(&dd->pcidev->dev, PAGE_SIZE,
(void *) dd->pioavailregs_dma,
dd->pioavailregs_phys);
dd->pioavailregs_dma = NULL;
}
if (dd->pageshadow) {
struct page **tmpp = dd->pageshadow;
dma_addr_t *tmpd = dd->physshadow;
int i, cnt = 0;
for (ctxt = 0; ctxt < dd->cfgctxts; ctxt++) {
int ctxt_tidbase = ctxt * dd->rcvtidcnt;
int maxtid = ctxt_tidbase + dd->rcvtidcnt;
for (i = ctxt_tidbase; i < maxtid; i++) {
if (!tmpp[i])
continue;
pci_unmap_page(dd->pcidev, tmpd[i],
PAGE_SIZE, PCI_DMA_FROMDEVICE);
qib_release_user_pages(&tmpp[i], 1);
tmpp[i] = NULL;
cnt++;
}
}
tmpp = dd->pageshadow;
dd->pageshadow = NULL;
vfree(tmpp);
}
/*
* Free any resources still in use (usually just kernel contexts)
* at unload; we do for ctxtcnt, because that's what we allocate.
* We acquire lock to be really paranoid that rcd isn't being
* accessed from some interrupt-related code (that should not happen,
* but best to be sure).
*/
spin_lock_irqsave(&dd->uctxt_lock, flags);
tmp = dd->rcd;
dd->rcd = NULL;
spin_unlock_irqrestore(&dd->uctxt_lock, flags);
for (ctxt = 0; tmp && ctxt < dd->ctxtcnt; ctxt++) {
struct qib_ctxtdata *rcd = tmp[ctxt];
tmp[ctxt] = NULL; /* debugging paranoia */
qib_free_ctxtdata(dd, rcd);
}
kfree(tmp);
kfree(dd->boardname);
}
/*
* Clean up on unit shutdown, or error during unit load after
* successful initialization.
*/
static void qib_postinit_cleanup(struct qib_devdata *dd)
{
/*
* Clean up chip-specific stuff.
* We check for NULL here, because it's outside
* the kregbase check, and we need to call it
* after the free_irq. Thus it's possible that
* the function pointers were never initialized.
*/
if (dd->f_cleanup)
dd->f_cleanup(dd);
qib_pcie_ddcleanup(dd);
cleanup_device_data(dd);
qib_free_devdata(dd);
}
static int __devinit qib_init_one(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret, j, pidx, initfail;
struct qib_devdata *dd = NULL;
ret = qib_pcie_init(pdev, ent);
if (ret)
goto bail;
/*
* Do device-specific initialiation, function table setup, dd
* allocation, etc.
*/
switch (ent->device) {
case PCI_DEVICE_ID_QLOGIC_IB_6120:
#ifdef CONFIG_PCI_MSI
dd = qib_init_iba6120_funcs(pdev, ent);
#else
qib_early_err(&pdev->dev, "QLogic PCIE device 0x%x cannot "
"work if CONFIG_PCI_MSI is not enabled\n",
ent->device);
dd = ERR_PTR(-ENODEV);
#endif
break;
case PCI_DEVICE_ID_QLOGIC_IB_7220:
dd = qib_init_iba7220_funcs(pdev, ent);
break;
case PCI_DEVICE_ID_QLOGIC_IB_7322:
dd = qib_init_iba7322_funcs(pdev, ent);
break;
default:
qib_early_err(&pdev->dev, "Failing on unknown QLogic "
"deviceid 0x%x\n", ent->device);
ret = -ENODEV;
}
if (IS_ERR(dd))
ret = PTR_ERR(dd);
if (ret)
goto bail; /* error already printed */
/* do the generic initialization */
initfail = qib_init(dd, 0);
ret = qib_register_ib_device(dd);
/*
* Now ready for use. this should be cleared whenever we
* detect a reset, or initiate one. If earlier failure,
* we still create devices, so diags, etc. can be used
* to determine cause of problem.
*/
if (!qib_mini_init && !initfail && !ret)
dd->flags |= QIB_INITTED;
j = qib_device_create(dd);
if (j)
qib_dev_err(dd, "Failed to create /dev devices: %d\n", -j);
j = qibfs_add(dd);
if (j)
qib_dev_err(dd, "Failed filesystem setup for counters: %d\n",
-j);
if (qib_mini_init || initfail || ret) {
qib_stop_timers(dd);
flush_workqueue(ib_wq);
for (pidx = 0; pidx < dd->num_pports; ++pidx)
dd->f_quiet_serdes(dd->pport + pidx);
if (qib_mini_init)
goto bail;
if (!j) {
(void) qibfs_remove(dd);
qib_device_remove(dd);
}
if (!ret)
qib_unregister_ib_device(dd);
qib_postinit_cleanup(dd);
if (initfail)
ret = initfail;
goto bail;
}
if (!qib_wc_pat) {
ret = qib_enable_wc(dd);
if (ret) {
qib_dev_err(dd, "Write combining not enabled "
"(err %d): performance may be poor\n",
-ret);
ret = 0;
}
}
qib_verify_pioperf(dd);
bail:
return ret;
}
static void __devexit qib_remove_one(struct pci_dev *pdev)
{
struct qib_devdata *dd = pci_get_drvdata(pdev);
int ret;
/* unregister from IB core */
qib_unregister_ib_device(dd);
/*
* Disable the IB link, disable interrupts on the device,
* clear dma engines, etc.
*/
if (!qib_mini_init)
qib_shutdown_device(dd);
qib_stop_timers(dd);
/* wait until all of our (qsfp) queue_work() calls complete */
flush_workqueue(ib_wq);
ret = qibfs_remove(dd);
if (ret)
qib_dev_err(dd, "Failed counters filesystem cleanup: %d\n",
-ret);
qib_device_remove(dd);
qib_postinit_cleanup(dd);
}
/**
* qib_create_rcvhdrq - create a receive header queue
* @dd: the qlogic_ib device
* @rcd: the context data
*
* This must be contiguous memory (from an i/o perspective), and must be
* DMA'able (which means for some systems, it will go through an IOMMU,
* or be forced into a low address range).
*/
int qib_create_rcvhdrq(struct qib_devdata *dd, struct qib_ctxtdata *rcd)
{
unsigned amt;
if (!rcd->rcvhdrq) {
dma_addr_t phys_hdrqtail;
gfp_t gfp_flags;
amt = ALIGN(dd->rcvhdrcnt * dd->rcvhdrentsize *
sizeof(u32), PAGE_SIZE);
gfp_flags = (rcd->ctxt >= dd->first_user_ctxt) ?
GFP_USER : GFP_KERNEL;
rcd->rcvhdrq = dma_alloc_coherent(
&dd->pcidev->dev, amt, &rcd->rcvhdrq_phys,
gfp_flags | __GFP_COMP);
if (!rcd->rcvhdrq) {
qib_dev_err(dd, "attempt to allocate %d bytes "
"for ctxt %u rcvhdrq failed\n",
amt, rcd->ctxt);
goto bail;
}
if (rcd->ctxt >= dd->first_user_ctxt) {
rcd->user_event_mask = vmalloc_user(PAGE_SIZE);
if (!rcd->user_event_mask)
goto bail_free_hdrq;
}
if (!(dd->flags & QIB_NODMA_RTAIL)) {
rcd->rcvhdrtail_kvaddr = dma_alloc_coherent(
&dd->pcidev->dev, PAGE_SIZE, &phys_hdrqtail,
gfp_flags);
if (!rcd->rcvhdrtail_kvaddr)
goto bail_free;
rcd->rcvhdrqtailaddr_phys = phys_hdrqtail;
}
rcd->rcvhdrq_size = amt;
}
/* clear for security and sanity on each use */
memset(rcd->rcvhdrq, 0, rcd->rcvhdrq_size);
if (rcd->rcvhdrtail_kvaddr)
memset(rcd->rcvhdrtail_kvaddr, 0, PAGE_SIZE);
return 0;
bail_free:
qib_dev_err(dd, "attempt to allocate 1 page for ctxt %u "
"rcvhdrqtailaddr failed\n", rcd->ctxt);
vfree(rcd->user_event_mask);
rcd->user_event_mask = NULL;
bail_free_hdrq:
dma_free_coherent(&dd->pcidev->dev, amt, rcd->rcvhdrq,
rcd->rcvhdrq_phys);
rcd->rcvhdrq = NULL;
bail:
return -ENOMEM;
}
/**
* allocate eager buffers, both kernel and user contexts.
* @rcd: the context we are setting up.
*
* Allocate the eager TID buffers and program them into hip.
* They are no longer completely contiguous, we do multiple allocation
* calls. Otherwise we get the OOM code involved, by asking for too
* much per call, with disastrous results on some kernels.
*/
int qib_setup_eagerbufs(struct qib_ctxtdata *rcd)
{
struct qib_devdata *dd = rcd->dd;
unsigned e, egrcnt, egrperchunk, chunk, egrsize, egroff;
size_t size;
gfp_t gfp_flags;
/*
* GFP_USER, but without GFP_FS, so buffer cache can be
* coalesced (we hope); otherwise, even at order 4,
* heavy filesystem activity makes these fail, and we can
* use compound pages.
*/
gfp_flags = __GFP_WAIT | __GFP_IO | __GFP_COMP;
egrcnt = rcd->rcvegrcnt;
egroff = rcd->rcvegr_tid_base;
egrsize = dd->rcvegrbufsize;
chunk = rcd->rcvegrbuf_chunks;
egrperchunk = rcd->rcvegrbufs_perchunk;
size = rcd->rcvegrbuf_size;
if (!rcd->rcvegrbuf) {
rcd->rcvegrbuf =
kzalloc(chunk * sizeof(rcd->rcvegrbuf[0]),
GFP_KERNEL);
if (!rcd->rcvegrbuf)
goto bail;
}
if (!rcd->rcvegrbuf_phys) {
rcd->rcvegrbuf_phys =
kmalloc(chunk * sizeof(rcd->rcvegrbuf_phys[0]),
GFP_KERNEL);
if (!rcd->rcvegrbuf_phys)
goto bail_rcvegrbuf;
}
for (e = 0; e < rcd->rcvegrbuf_chunks; e++) {
if (rcd->rcvegrbuf[e])
continue;
rcd->rcvegrbuf[e] =
dma_alloc_coherent(&dd->pcidev->dev, size,
&rcd->rcvegrbuf_phys[e],
gfp_flags);
if (!rcd->rcvegrbuf[e])
goto bail_rcvegrbuf_phys;
}
rcd->rcvegr_phys = rcd->rcvegrbuf_phys[0];
for (e = chunk = 0; chunk < rcd->rcvegrbuf_chunks; chunk++) {
dma_addr_t pa = rcd->rcvegrbuf_phys[chunk];
unsigned i;
/* clear for security and sanity on each use */
memset(rcd->rcvegrbuf[chunk], 0, size);
for (i = 0; e < egrcnt && i < egrperchunk; e++, i++) {
dd->f_put_tid(dd, e + egroff +
(u64 __iomem *)
((char __iomem *)
dd->kregbase +
dd->rcvegrbase),
RCVHQ_RCV_TYPE_EAGER, pa);
pa += egrsize;
}
cond_resched(); /* don't hog the cpu */
}
return 0;
bail_rcvegrbuf_phys:
for (e = 0; e < rcd->rcvegrbuf_chunks && rcd->rcvegrbuf[e]; e++)
dma_free_coherent(&dd->pcidev->dev, size,
rcd->rcvegrbuf[e], rcd->rcvegrbuf_phys[e]);
kfree(rcd->rcvegrbuf_phys);
rcd->rcvegrbuf_phys = NULL;
bail_rcvegrbuf:
kfree(rcd->rcvegrbuf);
rcd->rcvegrbuf = NULL;
bail:
return -ENOMEM;
}
/*
* Note: Changes to this routine should be mirrored
* for the diagnostics routine qib_remap_ioaddr32().
* There is also related code for VL15 buffers in qib_init_7322_variables().
* The teardown code that unmaps is in qib_pcie_ddcleanup()
*/
int init_chip_wc_pat(struct qib_devdata *dd, u32 vl15buflen)
{
u64 __iomem *qib_kregbase = NULL;
void __iomem *qib_piobase = NULL;
u64 __iomem *qib_userbase = NULL;
u64 qib_kreglen;
u64 qib_pio2koffset = dd->piobufbase & 0xffffffff;
u64 qib_pio4koffset = dd->piobufbase >> 32;
u64 qib_pio2klen = dd->piobcnt2k * dd->palign;
u64 qib_pio4klen = dd->piobcnt4k * dd->align4k;
u64 qib_physaddr = dd->physaddr;
u64 qib_piolen;
u64 qib_userlen = 0;
/*
* Free the old mapping because the kernel will try to reuse the
* old mapping and not create a new mapping with the
* write combining attribute.
*/
iounmap(dd->kregbase);
dd->kregbase = NULL;
/*
* Assumes chip address space looks like:
* - kregs + sregs + cregs + uregs (in any order)
* - piobufs (2K and 4K bufs in either order)
* or:
* - kregs + sregs + cregs (in any order)
* - piobufs (2K and 4K bufs in either order)
* - uregs
*/
if (dd->piobcnt4k == 0) {
qib_kreglen = qib_pio2koffset;
qib_piolen = qib_pio2klen;
} else if (qib_pio2koffset < qib_pio4koffset) {
qib_kreglen = qib_pio2koffset;
qib_piolen = qib_pio4koffset + qib_pio4klen - qib_kreglen;
} else {
qib_kreglen = qib_pio4koffset;
qib_piolen = qib_pio2koffset + qib_pio2klen - qib_kreglen;
}
qib_piolen += vl15buflen;
/* Map just the configured ports (not all hw ports) */
if (dd->uregbase > qib_kreglen)
qib_userlen = dd->ureg_align * dd->cfgctxts;
/* Sanity checks passed, now create the new mappings */
qib_kregbase = ioremap_nocache(qib_physaddr, qib_kreglen);
if (!qib_kregbase)
goto bail;
qib_piobase = ioremap_wc(qib_physaddr + qib_kreglen, qib_piolen);
if (!qib_piobase)
goto bail_kregbase;
if (qib_userlen) {
qib_userbase = ioremap_nocache(qib_physaddr + dd->uregbase,
qib_userlen);
if (!qib_userbase)
goto bail_piobase;
}
dd->kregbase = qib_kregbase;
dd->kregend = (u64 __iomem *)
((char __iomem *) qib_kregbase + qib_kreglen);
dd->piobase = qib_piobase;
dd->pio2kbase = (void __iomem *)
(((char __iomem *) dd->piobase) +
qib_pio2koffset - qib_kreglen);
if (dd->piobcnt4k)
dd->pio4kbase = (void __iomem *)
(((char __iomem *) dd->piobase) +
qib_pio4koffset - qib_kreglen);
if (qib_userlen)
/* ureg will now be accessed relative to dd->userbase */
dd->userbase = qib_userbase;
return 0;
bail_piobase:
iounmap(qib_piobase);
bail_kregbase:
iounmap(qib_kregbase);
bail:
return -ENOMEM;
}