/*
- * Copyright (c) 2006, 2007 QLogic Corporation. All rights reserved.
+ * Copyright (c) 2006, 2007, 2008 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
#include <linux/io.h>
#include <linux/pci.h>
#include <linux/vmalloc.h>
+#include <linux/fs.h>
#include <asm/uaccess.h>
#include "ipath_kernel.h"
struct ipath_devdata *dd;
ssize_t ret = 0;
u64 val;
+ u32 l_state, lt_state; /* LinkState, LinkTrainingState */
- if (count != sizeof(dp)) {
+ if (count < sizeof(odp)) {
ret = -EINVAL;
goto bail;
}
- if (copy_from_user(&dp, data, sizeof(dp))) {
+ if (count == sizeof(dp)) {
+ if (copy_from_user(&dp, data, sizeof(dp))) {
+ ret = -EFAULT;
+ goto bail;
+ }
+ } else if (copy_from_user(&odp, data, sizeof(odp))) {
ret = -EFAULT;
goto bail;
}
ret = -ENODEV;
goto bail;
}
- /* Check link state, but not if we have custom PBC */
- val = dd->ipath_lastibcstat & IPATH_IBSTATE_MASK;
- if (!dp.pbc_wd && val != IPATH_IBSTATE_INIT &&
- val != IPATH_IBSTATE_ARM && val != IPATH_IBSTATE_ACTIVE) {
+ /*
+ * Want to skip check for l_state if using custom PBC,
+ * because we might be trying to force an SM packet out.
+ * first-cut, skip _all_ state checking in that case.
+ */
+ val = ipath_ib_state(dd, dd->ipath_lastibcstat);
+ lt_state = ipath_ib_linktrstate(dd, dd->ipath_lastibcstat);
+ l_state = ipath_ib_linkstate(dd, dd->ipath_lastibcstat);
+ if (!dp.pbc_wd && (lt_state != INFINIPATH_IBCS_LT_STATE_LINKUP ||
+ (val != dd->ib_init && val != dd->ib_arm &&
+ val != dd->ib_active))) {
ipath_cdbg(VERBOSE, "unit %u not ready (state %llx)\n",
dd->ipath_unit, (unsigned long long) val);
ret = -EINVAL;
goto bail;
}
- piobuf = ipath_getpiobuf(dd, &pbufn);
+ plen >>= 2; /* in dwords */
+
+ piobuf = ipath_getpiobuf(dd, plen, &pbufn);
if (!piobuf) {
ipath_cdbg(VERBOSE, "No PIO buffers avail unit for %u\n",
dd->ipath_unit);
ret = -EBUSY;
goto bail;
}
-
- plen >>= 2; /* in dwords */
+ /* disarm it just to be extra sure */
+ ipath_disarm_piobufs(dd, pbufn, 1);
if (ipath_debug & __IPATH_PKTDBG)
ipath_cdbg(VERBOSE, "unit %u 0x%x+1w pio%d\n",
dd->ipath_unit, plen - 1, pbufn);
if (dp.pbc_wd == 0)
- /* Legacy operation, use computed pbc_wd */
dp.pbc_wd = plen;
-
- /* we have to flush after the PBC for correctness on some cpus
- * or WC buffer can be written out of order */
writeq(dp.pbc_wd, piobuf);
- ipath_flush_wc();
- /* copy all by the trigger word, then flush, so it's written
+ /*
+ * Copy all by the trigger word, then flush, so it's written
* to chip before trigger word, then write trigger word, then
- * flush again, so packet is sent. */
- __iowrite32_copy(piobuf + 2, tmpbuf, clen - 1);
- ipath_flush_wc();
- __raw_writel(tmpbuf[clen - 1], piobuf + clen + 1);
+ * flush again, so packet is sent.
+ */
+ if (dd->ipath_flags & IPATH_PIO_FLUSH_WC) {
+ ipath_flush_wc();
+ __iowrite32_copy(piobuf + 2, tmpbuf, clen - 1);
+ ipath_flush_wc();
+ __raw_writel(tmpbuf[clen - 1], piobuf + clen + 1);
+ } else
+ __iowrite32_copy(piobuf + 2, tmpbuf, clen);
+
ipath_flush_wc();
ret = sizeof(dp);