/*
* 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 "ipath_kernel.h"
#include "ips_common.h"
/*
* min buffers we want to have per port, after driver
*/
#define IPATH_MIN_USER_PORT_BUFCNT 8
/*
* Number of ports we are configured to use (to allow for more pio
* buffers per port, etc.) Zero means use chip value.
*/
static ushort ipath_cfgports;
module_param_named(cfgports, ipath_cfgports, ushort, S_IRUGO);
MODULE_PARM_DESC(cfgports, "Set max number of ports to use");
/*
* Number of buffers reserved for driver (layered drivers and SMA
* send). Reserved at end of buffer list.
*/
static ushort ipath_kpiobufs = 32;
static int ipath_set_kpiobufs(const char *val, struct kernel_param *kp);
module_param_call(kpiobufs, ipath_set_kpiobufs, param_get_uint,
&ipath_kpiobufs, S_IWUSR | S_IRUGO);
MODULE_PARM_DESC(kpiobufs, "Set number of PIO buffers for driver");
/**
* create_port0_egr - allocate the eager TID buffers
* @dd: the infinipath device
*
* This code is now quite different for user and kernel, because
* the kernel uses skb's, for the accelerated network performance.
* This is the kernel (port0) version.
*
* Allocate the eager TID buffers and program them into infinipath.
* We use the network layer alloc_skb() allocator to allocate the
* memory, and either use the buffers as is for things like SMA
* packets, or pass the buffers up to the ipath layered driver and
* thence the network layer, replacing them as we do so (see
* ipath_rcv_layer()).
*/
static int create_port0_egr(struct ipath_devdata *dd)
{
unsigned e, egrcnt;
struct sk_buff **skbs;
int ret;
egrcnt = dd->ipath_rcvegrcnt;
skbs = vmalloc(sizeof(*dd->ipath_port0_skbs) * egrcnt);
if (skbs == NULL) {
ipath_dev_err(dd, "allocation error for eager TID "
"skb array\n");
ret = -ENOMEM;
goto bail;
}
for (e = 0; e < egrcnt; e++) {
/*
* This is a bit tricky in that we allocate extra
* space for 2 bytes of the 14 byte ethernet header.
* These two bytes are passed in the ipath header so
* the rest of the data is word aligned. We allocate
* 4 bytes so that the data buffer stays word aligned.
* See ipath_kreceive() for more details.
*/
skbs[e] = ipath_alloc_skb(dd, GFP_KERNEL);
if (!skbs[e]) {
ipath_dev_err(dd, "SKB allocation error for "
"eager TID %u\n", e);
while (e != 0)
dev_kfree_skb(skbs[--e]);
ret = -ENOMEM;
goto bail;
}
}
/*
* After loop above, so we can test non-NULL to see if ready
* to use at receive, etc.
*/
dd->ipath_port0_skbs = skbs;
for (e = 0; e < egrcnt; e++) {
unsigned long phys =
virt_to_phys(dd->ipath_port0_skbs[e]->data);
dd->ipath_f_put_tid(dd, e + (u64 __iomem *)
((char __iomem *) dd->ipath_kregbase +
dd->ipath_rcvegrbase), 0, phys);
}
ret = 0;
bail:
return ret;
}
static int bringup_link(struct ipath_devdata *dd)
{
u64 val, ibc;
int ret = 0;
/* hold IBC in reset */
dd->ipath_control &= ~INFINIPATH_C_LINKENABLE;
ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
dd->ipath_control);
/*
* Note that prior to try 14 or 15 of IB, the credit scaling
* wasn't working, because it was swapped for writes with the
* 1 bit default linkstate field
*/
/* ignore pbc and align word */
val = dd->ipath_piosize2k - 2 * sizeof(u32);
/*
* for ICRC, which we only send in diag test pkt mode, and we
* don't need to worry about that for mtu
*/
val += 1;
/*
* Set the IBC maxpktlength to the size of our pio buffers the
* maxpktlength is in words. This is *not* the IB data MTU.
*/
ibc = (val / sizeof(u32)) << INFINIPATH_IBCC_MAXPKTLEN_SHIFT;
/* in KB */
ibc |= 0x5ULL << INFINIPATH_IBCC_FLOWCTRLWATERMARK_SHIFT;
/*
* How often flowctrl sent. More or less in usecs; balance against
* watermark value, so that in theory senders always get a flow
* control update in time to not let the IB link go idle.
*/
ibc |= 0x3ULL << INFINIPATH_IBCC_FLOWCTRLPERIOD_SHIFT;
/* max error tolerance */
ibc |= 0xfULL << INFINIPATH_IBCC_PHYERRTHRESHOLD_SHIFT;
/* use "real" buffer space for */
ibc |= 4ULL << INFINIPATH_IBCC_CREDITSCALE_SHIFT;
/* IB credit flow control. */
ibc |= 0xfULL << INFINIPATH_IBCC_OVERRUNTHRESHOLD_SHIFT;
/* initially come up waiting for TS1, without sending anything. */
dd->ipath_ibcctrl = ibc;
/*
* Want to start out with both LINKCMD and LINKINITCMD in NOP
* (0 and 0). Don't put linkinitcmd in ipath_ibcctrl, want that
* to stay a NOP
*/
ibc |= INFINIPATH_IBCC_LINKINITCMD_DISABLE <<
INFINIPATH_IBCC_LINKINITCMD_SHIFT;
ipath_cdbg(VERBOSE, "Writing 0x%llx to ibcctrl\n",
(unsigned long long) ibc);
ipath_write_kreg(dd, dd->ipath_kregs->kr_ibcctrl, ibc);
// be sure chip saw it
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_scratch);
ret = dd->ipath_f_bringup_serdes(dd);
if (ret)
dev_info(&dd->pcidev->dev, "Could not initialize SerDes, "
"not usable\n");
else {
/* enable IBC */
dd->ipath_control |= INFINIPATH_C_LINKENABLE;
ipath_write_kreg(dd, dd->ipath_kregs->kr_control,
dd->ipath_control);
}
return ret;
}
static int init_chip_first(struct ipath_devdata *dd,
struct ipath_portdata **pdp)
{
struct ipath_portdata *pd = NULL;
int ret = 0;
u64 val;
/*
* skip cfgports stuff because we are not allocating memory,
* and we don't want problems if the portcnt changed due to
* cfgports. We do still check and report a difference, if
* not same (should be impossible).
*/
dd->ipath_portcnt =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
if (!ipath_cfgports)
dd->ipath_cfgports = dd->ipath_portcnt;
else if (ipath_cfgports <= dd->ipath_portcnt) {
dd->ipath_cfgports = ipath_cfgports;
ipath_dbg("Configured to use %u ports out of %u in chip\n",
dd->ipath_cfgports, dd->ipath_portcnt);
} else {
dd->ipath_cfgports = dd->ipath_portcnt;
ipath_dbg("Tried to configured to use %u ports; chip "
"only supports %u\n", ipath_cfgports,
dd->ipath_portcnt);
}
dd->ipath_pd = kzalloc(sizeof(*dd->ipath_pd) * dd->ipath_cfgports,
GFP_KERNEL);
if (!dd->ipath_pd) {
ipath_dev_err(dd, "Unable to allocate portdata array, "
"failing\n");
ret = -ENOMEM;
goto done;
}
dd->ipath_lastegrheads = kzalloc(sizeof(*dd->ipath_lastegrheads)
* dd->ipath_cfgports,
GFP_KERNEL);
dd->ipath_lastrcvhdrqtails =
kzalloc(sizeof(*dd->ipath_lastrcvhdrqtails)
* dd->ipath_cfgports, GFP_KERNEL);
if (!dd->ipath_lastegrheads || !dd->ipath_lastrcvhdrqtails) {
ipath_dev_err(dd, "Unable to allocate head arrays, "
"failing\n");
ret = -ENOMEM;
goto done;
}
dd->ipath_pd[0] = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!dd->ipath_pd[0]) {
ipath_dev_err(dd, "Unable to allocate portdata for port "
"0, failing\n");
ret = -ENOMEM;
goto done;
}
pd = dd->ipath_pd[0];
pd->port_dd = dd;
pd->port_port = 0;
pd->port_cnt = 1;
/* The port 0 pkey table is used by the layer interface. */
pd->port_pkeys[0] = IPS_DEFAULT_P_KEY;
dd->ipath_rcvtidcnt =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt);
dd->ipath_rcvtidbase =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase);
dd->ipath_rcvegrcnt =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
dd->ipath_rcvegrbase =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase);
dd->ipath_palign =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_pagealign);
dd->ipath_piobufbase =
ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufbase);
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiosize);
dd->ipath_piosize2k = val & ~0U;
dd->ipath_piosize4k = val >> 32;
dd->ipath_ibmtu = 4096; /* default to largest legal MTU */
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpiobufcnt);
dd->ipath_piobcnt2k = val & ~0U;
dd->ipath_piobcnt4k = val >> 32;
dd->ipath_pio2kbase =
(u32 __iomem *) (((char __iomem *) dd->ipath_kregbase) +
(dd->ipath_piobufbase & 0xffffffff));
if (dd->ipath_piobcnt4k) {
dd->ipath_pio4kbase = (u32 __iomem *)
(((char __iomem *) dd->ipath_kregbase) +
(dd->ipath_piobufbase >> 32));
/*
* 4K buffers take 2 pages; we use roundup just to be
* paranoid; we calculate it once here, rather than on
* ever buf allocate
*/
dd->ipath_4kalign = ALIGN(dd->ipath_piosize4k,
dd->ipath_palign);
ipath_dbg("%u 2k(%x) piobufs @ %p, %u 4k(%x) @ %p "
"(%x aligned)\n",
dd->ipath_piobcnt2k, dd->ipath_piosize2k,
dd->ipath_pio2kbase, dd->ipath_piobcnt4k,
dd->ipath_piosize4k, dd->ipath_pio4kbase,
dd->ipath_4kalign);
}
else ipath_dbg("%u 2k piobufs @ %p\n",
dd->ipath_piobcnt2k, dd->ipath_pio2kbase);
spin_lock_init(&dd->ipath_tid_lock);
done:
*pdp = pd;
return ret;
}
/**
* init_chip_reset - re-initialize after a reset, or enable
* @dd: the infinipath device
* @pdp: output for port data
*
* sanity check at least some of the values after reset, and
* ensure no receive or transmit (explictly, in case reset
* failed
*/
static int init_chip_reset(struct ipath_devdata *dd,
struct ipath_portdata **pdp)
{
struct ipath_portdata *pd;
u32 rtmp;
*pdp = pd = dd->ipath_pd[0];
/* ensure chip does no sends or receives while we re-initialize */
dd->ipath_control = dd->ipath_sendctrl = dd->ipath_rcvctrl = 0U;
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl, 0);
ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl, 0);
ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0);
rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_portcnt);
if (dd->ipath_portcnt != rtmp)
dev_info(&dd->pcidev->dev, "portcnt was %u before "
"reset, now %u, using original\n",
dd->ipath_portcnt, rtmp);
rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidcnt);
if (rtmp != dd->ipath_rcvtidcnt)
dev_info(&dd->pcidev->dev, "tidcnt was %u before "
"reset, now %u, using original\n",
dd->ipath_rcvtidcnt, rtmp);
rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvtidbase);
if (rtmp != dd->ipath_rcvtidbase)
dev_info(&dd->pcidev->dev, "tidbase was %u before "
"reset, now %u, using original\n",
dd->ipath_rcvtidbase, rtmp);
rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrcnt);
if (rtmp != dd->ipath_rcvegrcnt)
dev_info(&dd->pcidev->dev, "egrcnt was %u before "
"reset, now %u, using original\n",
dd->ipath_rcvegrcnt, rtmp);
rtmp = ipath_read_kreg32(dd, dd->ipath_kregs->kr_rcvegrbase);
if (rtmp != dd->ipath_rcvegrbase)
dev_info(&dd->pcidev->dev, "egrbase was %u before "
"reset, now %u, using original\n",
dd->ipath_rcvegrbase, rtmp);
return 0;
}
static int init_pioavailregs(struct ipath_devdata *dd)
{
int ret;
dd->ipath_pioavailregs_dma = dma_alloc_coherent(
&dd->pcidev->dev, PAGE_SIZE, &dd->ipath_pioavailregs_phys,
GFP_KERNEL);
if (!dd->ipath_pioavailregs_dma) {
ipath_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.
*/
dd->ipath_statusp = (u64 *)
((char *)dd->ipath_pioavailregs_dma +
((2 * L1_CACHE_BYTES +
dd->ipath_pioavregs * sizeof(u64)) & ~L1_CACHE_BYTES));
/* copy the current value now that it's really allocated */
*dd->ipath_statusp = dd->_ipath_status;
/*
* setup buffer to hold freeze msg, accessible to apps,
* following statusp
*/
dd->ipath_freezemsg = (char *)&dd->ipath_statusp[1];
/* and its length */
dd->ipath_freezelen = L1_CACHE_BYTES - sizeof(dd->ipath_statusp[0]);
if (dd->ipath_unit * 64 > (IPATH_PORT0_RCVHDRTAIL_SIZE - 64)) {
ipath_dev_err(dd, "unit %u too large for port 0 "
"rcvhdrtail buffer size\n", dd->ipath_unit);
ret = -ENODEV;
}
else
ret = 0;
/* so we can get current tail in ipath_kreceive(), per chip */
dd->ipath_hdrqtailptr = &ipath_port0_rcvhdrtail[
dd->ipath_unit * (64 / sizeof(*ipath_port0_rcvhdrtail))];
done:
return ret;
}
/**
* init_shadow_tids - allocate the shadow TID array
* @dd: the infinipath device
*
* allocate the shadow TID array, so we can ipath_munlock previous
* entries. It may make more sense to move the pageshadow to the
* port data structure, so we only allocate memory for ports actually
* in use, since we at 8k per port, now.
*/
static void init_shadow_tids(struct ipath_devdata *dd)
{
dd->ipath_pageshadow = (struct page **)
vmalloc(dd->ipath_cfgports * dd->ipath_rcvtidcnt *
sizeof(struct page *));
if (!dd->ipath_pageshadow)
ipath_dev_err(dd, "failed to allocate shadow page * "
"array, no expected sends!\n");
else
memset(dd->ipath_pageshadow, 0,
dd->ipath_cfgports * dd->ipath_rcvtidcnt *
sizeof(struct page *));
}
static void enable_chip(struct ipath_devdata *dd,
struct ipath_portdata *pd, int reinit)
{
u32 val;
int i;
if (!reinit) {
init_waitqueue_head(&ipath_sma_state_wait);
}
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
dd->ipath_rcvctrl);
/* Enable PIO send, and update of PIOavail regs to memory. */
dd->ipath_sendctrl = INFINIPATH_S_PIOENABLE |
INFINIPATH_S_PIOBUFAVAILUPD;
ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
dd->ipath_sendctrl);
/*
* enable port 0 receive, and receive interrupt. other ports
* done as user opens and inits them.
*/
dd->ipath_rcvctrl = INFINIPATH_R_TAILUPD |
(1ULL << INFINIPATH_R_PORTENABLE_SHIFT) |
(1ULL << INFINIPATH_R_INTRAVAIL_SHIFT);
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvctrl,
dd->ipath_rcvctrl);
/*
* now ready for use. this should be cleared whenever we
* detect a reset, or initiate one.
*/
dd->ipath_flags |= IPATH_INITTED;
/*
* init our shadow copies of head from tail values, and write
* head values to match.
*/
val = ipath_read_ureg32(dd, ur_rcvegrindextail, 0);
(void)ipath_write_ureg(dd, ur_rcvegrindexhead, val, 0);
dd->ipath_port0head = ipath_read_ureg32(dd, ur_rcvhdrtail, 0);
/* Initialize so we interrupt on next packet received */
(void)ipath_write_ureg(dd, ur_rcvhdrhead,
dd->ipath_rhdrhead_intr_off |
dd->ipath_port0head, 0);
/*
* 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->ipath_pioavregs; i++) {
__le64 val;
/*
* Chip Errata bug 6641; even and odd qwords>3 are swapped.
*/
if (i > 3) {
if (i & 1)
val = dd->ipath_pioavailregs_dma[i - 1];
else
val = dd->ipath_pioavailregs_dma[i + 1];
}
else
val = dd->ipath_pioavailregs_dma[i];
dd->ipath_pioavailshadow[i] = le64_to_cpu(val);
}
/* can get counters, stats, etc. */
dd->ipath_flags |= IPATH_PRESENT;
}
static int init_housekeeping(struct ipath_devdata *dd,
struct ipath_portdata **pdp, int reinit)
{
char boardn[32];
int ret = 0;
/*
* have to clear shadow copies of registers at init that are
* not otherwise set here, or all kinds of bizarre things
* happen with driver on chip reset
*/
dd->ipath_rcvhdrsize = 0;
/*
* 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.
*/
dd->ipath_flags |= IPATH_LINKUNK;
dd->ipath_flags &= ~(IPATH_LINKACTIVE | IPATH_LINKARMED |
IPATH_LINKDOWN | IPATH_LINKINIT);
ipath_cdbg(VERBOSE, "Try to read spc chip revision\n");
dd->ipath_revision =
ipath_read_kreg64(dd, dd->ipath_kregs->kr_revision);
/*
* set up fundamental info we need to use the chip; we assume
* if the revision reg and these regs are OK, we don't need to
* special case the rest
*/
dd->ipath_sregbase =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_sendregbase);
dd->ipath_cregbase =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_counterregbase);
dd->ipath_uregbase =
ipath_read_kreg32(dd, dd->ipath_kregs->kr_userregbase);
ipath_cdbg(VERBOSE, "ipath_kregbase %p, sendbase %x usrbase %x, "
"cntrbase %x\n", dd->ipath_kregbase, dd->ipath_sregbase,
dd->ipath_uregbase, dd->ipath_cregbase);
if ((dd->ipath_revision & 0xffffffff) == 0xffffffff
|| (dd->ipath_sregbase & 0xffffffff) == 0xffffffff
|| (dd->ipath_cregbase & 0xffffffff) == 0xffffffff
|| (dd->ipath_uregbase & 0xffffffff) == 0xffffffff) {
ipath_dev_err(dd, "Register read failures from chip, "
"giving up initialization\n");
ret = -ENODEV;
goto done;
}
/* clear the initial reset flag, in case first driver load */
ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear,
INFINIPATH_E_RESET);
if (reinit)
ret = init_chip_reset(dd, pdp);
else
ret = init_chip_first(dd, pdp);
if (ret)
goto done;
ipath_cdbg(VERBOSE, "Revision %llx (PCI %x), %u ports, %u tids, "
"%u egrtids\n", (unsigned long long) dd->ipath_revision,
dd->ipath_pcirev, dd->ipath_portcnt, dd->ipath_rcvtidcnt,
dd->ipath_rcvegrcnt);
if (((dd->ipath_revision >> INFINIPATH_R_SOFTWARE_SHIFT) &
INFINIPATH_R_SOFTWARE_MASK) != IPATH_CHIP_SWVERSION) {
ipath_dev_err(dd, "Driver only handles version %d, "
"chip swversion is %d (%llx), failng\n",
IPATH_CHIP_SWVERSION,
(int)(dd->ipath_revision >>
INFINIPATH_R_SOFTWARE_SHIFT) &
INFINIPATH_R_SOFTWARE_MASK,
(unsigned long long) dd->ipath_revision);
ret = -ENOSYS;
goto done;
}
dd->ipath_majrev = (u8) ((dd->ipath_revision >>
INFINIPATH_R_CHIPREVMAJOR_SHIFT) &
INFINIPATH_R_CHIPREVMAJOR_MASK);
dd->ipath_minrev = (u8) ((dd->ipath_revision >>
INFINIPATH_R_CHIPREVMINOR_SHIFT) &
INFINIPATH_R_CHIPREVMINOR_MASK);
dd->ipath_boardrev = (u8) ((dd->ipath_revision >>
INFINIPATH_R_BOARDID_SHIFT) &
INFINIPATH_R_BOARDID_MASK);
ret = dd->ipath_f_get_boardname(dd, boardn, sizeof boardn);
snprintf(dd->ipath_boardversion, sizeof(dd->ipath_boardversion),
"Driver %u.%u, %s, InfiniPath%u %u.%u, PCI %u, "
"SW Compat %u\n",
IPATH_CHIP_VERS_MAJ, IPATH_CHIP_VERS_MIN, boardn,
(unsigned)(dd->ipath_revision >> INFINIPATH_R_ARCH_SHIFT) &
INFINIPATH_R_ARCH_MASK,
dd->ipath_majrev, dd->ipath_minrev, dd->ipath_pcirev,
(unsigned)(dd->ipath_revision >>
INFINIPATH_R_SOFTWARE_SHIFT) &
INFINIPATH_R_SOFTWARE_MASK);
ipath_dbg("%s", dd->ipath_boardversion);
done:
return ret;
}
/**
* ipath_init_chip - do the actual initialization sequence on the chip
* @dd: the infinipath 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 ipath_init_chip(struct ipath_devdata *dd, int reinit)
{
int ret = 0, i;
u32 val32, kpiobufs;
u64 val, atmp;
struct ipath_portdata *pd = NULL; /* keep gcc4 happy */
ret = init_housekeeping(dd, &pd, reinit);
if (ret)
goto done;
/*
* we ignore most issues after reporting them, but have to specially
* handle hardware-disabled chips.
*/
if (ret == 2) {
/* unique error, known to ipath_init_one */
ret = -EPERM;
goto done;
}
/*
* We could bump this to allow for full rcvegrcnt + rcvtidcnt,
* but then it no longer nicely fits power of two, and since
* we now use routines that backend onto __get_free_pages, the
* rest would be wasted.
*/
dd->ipath_rcvhdrcnt = dd->ipath_rcvegrcnt;
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrcnt,
dd->ipath_rcvhdrcnt);
/*
* 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. This has to
* be done early, before we calculate lastport, etc.
*/
val = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k;
/*
* calc number of pioavail registers, and save it; we have 2
* bits per buffer.
*/
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
kpiobufs = ipath_kpiobufs;
if (kpiobufs >
(dd->ipath_piobcnt2k + dd->ipath_piobcnt4k -
(dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT))) {
i = dd->ipath_piobcnt2k + dd->ipath_piobcnt4k -
(dd->ipath_cfgports * IPATH_MIN_USER_PORT_BUFCNT);
if (i < 0)
i = 0;
dev_info(&dd->pcidev->dev, "Allocating %d PIO bufs for "
"kernel leaves too few for %d user ports "
"(%d each); using %u\n", kpiobufs,
dd->ipath_cfgports - 1,
IPATH_MIN_USER_PORT_BUFCNT, i);
/*
* shouldn't change ipath_kpiobufs, because could be
* different for different devices...
*/
kpiobufs = i;
}
dd->ipath_lastport_piobuf =
dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - kpiobufs;
dd->ipath_pbufsport = dd->ipath_cfgports > 1
? dd->ipath_lastport_piobuf / (dd->ipath_cfgports - 1)
: 0;
val32 = dd->ipath_lastport_piobuf -
(dd->ipath_pbufsport * (dd->ipath_cfgports - 1));
if (val32 > 0) {
ipath_dbg("allocating %u pbufs/port leaves %u unused, "
"add to kernel\n", dd->ipath_pbufsport, val32);
dd->ipath_lastport_piobuf -= val32;
ipath_dbg("%u pbufs/port leaves %u unused, add to kernel\n",
dd->ipath_pbufsport, val32);
}
dd->ipath_lastpioindex = dd->ipath_lastport_piobuf;
ipath_cdbg(VERBOSE, "%d PIO bufs for kernel out of %d total %u "
"each for %u user ports\n", kpiobufs,
dd->ipath_piobcnt2k + dd->ipath_piobcnt4k,
dd->ipath_pbufsport, dd->ipath_cfgports - 1);
dd->ipath_f_early_init(dd);
/* early_init sets rcvhdrentsize and rcvhdrsize, so this must be
* done after early_init */
dd->ipath_hdrqlast =
dd->ipath_rcvhdrentsize * (dd->ipath_rcvhdrcnt - 1);
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrentsize,
dd->ipath_rcvhdrentsize);
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvhdrsize,
dd->ipath_rcvhdrsize);
if (!reinit) {
ret = init_pioavailregs(dd);
init_shadow_tids(dd);
if (ret)
goto done;
}
(void)ipath_write_kreg(dd, dd->ipath_kregs->kr_sendpioavailaddr,
dd->ipath_pioavailregs_phys);
/*
* this is to detect s/w errors, which the h/w works around by
* ignoring the low 6 bits of address, if it wasn't aligned.
*/
val = ipath_read_kreg64(dd, dd->ipath_kregs->kr_sendpioavailaddr);
if (val != dd->ipath_pioavailregs_phys) {
ipath_dev_err(dd, "Catastrophic software error, "
"SendPIOAvailAddr written as %lx, "
"read back as %llx\n",
(unsigned long) dd->ipath_pioavailregs_phys,
(unsigned long long) val);
ret = -EINVAL;
goto done;
}
val = ipath_port0_rcvhdrtail_dma + dd->ipath_unit * 64;
/* verify that the alignment requirement was met */
ipath_write_kreg_port(dd, dd->ipath_kregs->kr_rcvhdrtailaddr,
0, val);
atmp = ipath_read_kreg64_port(
dd, dd->ipath_kregs->kr_rcvhdrtailaddr, 0);
if (val != atmp) {
ipath_dev_err(dd, "Catastrophic software error, "
"RcvHdrTailAddr0 written as %llx, "
"read back as %llx from %x\n",
(unsigned long long) val,
(unsigned long long) atmp,
dd->ipath_kregs->kr_rcvhdrtailaddr);
ret = -EINVAL;
goto done;
}
ipath_write_kreg(dd, dd->ipath_kregs->kr_rcvbthqp, IPATH_KD_QP);
/*
* make sure we are not in freeze, and PIO send enabled, so
* writes to pbc happen
*/
ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask, 0ULL);
ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
~0ULL&~INFINIPATH_HWE_MEMBISTFAILED);
ipath_write_kreg(dd, dd->ipath_kregs->kr_control, 0ULL);
ipath_write_kreg(dd, dd->ipath_kregs->kr_sendctrl,
INFINIPATH_S_PIOENABLE);
/*
* before error clears, since we expect serdes pll errors during
* this, the first time after reset
*/
if (bringup_link(dd)) {
dev_info(&dd->pcidev->dev, "Failed to bringup IB link\n");
ret = -ENETDOWN;
goto done;
}
/*
* clear any "expected" hwerrs from reset and/or initialization
* clear any that aren't enabled (at least this once), and then
* set the enable mask
*/
dd->ipath_f_init_hwerrors(dd);
ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrclear,
~0ULL&~INFINIPATH_HWE_MEMBISTFAILED);
ipath_write_kreg(dd, dd->ipath_kregs->kr_hwerrmask,
dd->ipath_hwerrmask);
dd->ipath_maskederrs = dd->ipath_ignorederrs;
/* clear all */
ipath_write_kreg(dd, dd->ipath_kregs->kr_errorclear, -1LL);
/* enable errors that are masked, at least this first time. */
ipath_write_kreg(dd, dd->ipath_kregs->kr_errormask,
~dd->ipath_maskederrs);
/* clear any interrups up to this point (ints still not enabled) */
ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, -1LL);
ipath_stats.sps_lid[dd->ipath_unit] = dd->ipath_lid;
/*
* Set up the port 0 (kernel) rcvhdr q and egr TIDs. If doing
* re-init, the simplest way to handle this is to free
* existing, and re-allocate.
*/
if (reinit)
ipath_free_pddata(dd, 0, 0);
dd->ipath_f_tidtemplate(dd);
ret = ipath_create_rcvhdrq(dd, pd);
if (!ret)
ret = create_port0_egr(dd);
if (ret)
ipath_dev_err(dd, "failed to allocate port 0 (kernel) "
"rcvhdrq and/or egr bufs\n");
else
enable_chip(dd, pd, reinit);
/*
* cause retrigger of pending interrupts ignored during init,
* even if we had errors
*/
ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear, 0ULL);
if(!dd->ipath_stats_timer_active) {
/*
* first init, or after an admin disable/enable
* set up stats retrieval timer, even if we had errors
* in last portion of setup
*/
init_timer(&dd->ipath_stats_timer);
dd->ipath_stats_timer.function = ipath_get_faststats;
dd->ipath_stats_timer.data = (unsigned long) dd;
/* every 5 seconds; */
dd->ipath_stats_timer.expires = jiffies + 5 * HZ;
/* takes ~16 seconds to overflow at full IB 4x bandwdith */
add_timer(&dd->ipath_stats_timer);
dd->ipath_stats_timer_active = 1;
}
done:
if (!ret) {
ipath_get_guid(dd);
*dd->ipath_statusp |= IPATH_STATUS_CHIP_PRESENT;
if (!dd->ipath_f_intrsetup(dd)) {
/* now we can enable all interrupts from the chip */
ipath_write_kreg(dd, dd->ipath_kregs->kr_intmask,
-1LL);
/* force re-interrupt of any pending interrupts. */
ipath_write_kreg(dd, dd->ipath_kregs->kr_intclear,
0ULL);
/* chip is usable; mark it as initialized */
*dd->ipath_statusp |= IPATH_STATUS_INITTED;
} else
ipath_dev_err(dd, "No interrupts enabled, couldn't "
"setup interrupt address\n");
if (dd->ipath_cfgports > ipath_stats.sps_nports)
/*
* sps_nports is a global, so, we set it to
* the highest number of ports of any of the
* chips we find; we never decrement it, at
* least for now. Since this might have changed
* over disable/enable or prior to reset, always
* do the check and potentially adjust.
*/
ipath_stats.sps_nports = dd->ipath_cfgports;
} else
ipath_dbg("Failed (%d) to initialize chip\n", ret);
/* if ret is non-zero, we probably should do some cleanup
here... */
return ret;
}
static int ipath_set_kpiobufs(const char *str, struct kernel_param *kp)
{
struct ipath_devdata *dd;
unsigned long flags;
unsigned short val;
int ret;
ret = ipath_parse_ushort(str, &val);
spin_lock_irqsave(&ipath_devs_lock, flags);
if (ret < 0)
goto bail;
if (val == 0) {
ret = -EINVAL;
goto bail;
}
list_for_each_entry(dd, &ipath_dev_list, ipath_list) {
if (dd->ipath_kregbase)
continue;
if (val > (dd->ipath_piobcnt2k + dd->ipath_piobcnt4k -
(dd->ipath_cfgports *
IPATH_MIN_USER_PORT_BUFCNT)))
{
ipath_dev_err(
dd,
"Allocating %d PIO bufs for kernel leaves "
"too few for %d user ports (%d each)\n",
val, dd->ipath_cfgports - 1,
IPATH_MIN_USER_PORT_BUFCNT);
ret = -EINVAL;
goto bail;
}
dd->ipath_lastport_piobuf =
dd->ipath_piobcnt2k + dd->ipath_piobcnt4k - val;
}
ret = 0;
bail:
spin_unlock_irqrestore(&ipath_devs_lock, flags);
return ret;
}
