Merge branch 'linus' into x86/memory-corruption-check

[linux-2.6] / drivers / infiniband / hw / ipath / ipath_wc_x86_64.c

diff --git a/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c b/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c
index adc5322..3428acb 100644 (file)
--- a/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c
+++ b/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c
@@ -1,4 +1,5 @@
 /*
+ * Copyright (c) 2006, 2007 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
@@ -62,12 +63,29 @@ int ipath_enable_wc(struct ipath_devdata *dd)
         * of 2 address matching the length (which has to be a power of 2).
         * For rev1, that means the base address, for rev2, it will be just
         * the PIO buffers themselves.
+        * For chips with two sets of buffers, the calculations are
+        * somewhat more complicated; we need to sum, and the piobufbase
+        * register has both offsets, 2K in low 32 bits, 4K in high 32 bits.
+        * The buffers are still packed, so a single range covers both.
         */
-       pioaddr = addr + dd->ipath_piobufbase;
-       piolen = (dd->ipath_piobcnt2k +
-                 dd->ipath_piobcnt4k) *
-               ALIGN(dd->ipath_piobcnt2k +
-                     dd->ipath_piobcnt4k, dd->ipath_palign);
+       if (dd->ipath_piobcnt2k && dd->ipath_piobcnt4k) { /* 2 sizes */
+               unsigned long pio2kbase, pio4kbase;
+               pio2kbase = dd->ipath_piobufbase & 0xffffffffUL;
+               pio4kbase = (dd->ipath_piobufbase >> 32) & 0xffffffffUL;
+               if (pio2kbase < pio4kbase) { /* all, for now */
+                       pioaddr = addr + pio2kbase;
+                       piolen = pio4kbase - pio2kbase +
+                               dd->ipath_piobcnt4k * dd->ipath_4kalign;
+               } else {
+                       pioaddr = addr + pio4kbase;
+                       piolen = pio2kbase - pio4kbase +
+                               dd->ipath_piobcnt2k * dd->ipath_palign;
+               }
+       } else {  /* single buffer size (2K, currently) */
+               pioaddr = addr + dd->ipath_piobufbase;
+               piolen = dd->ipath_piobcnt2k * dd->ipath_palign +
+                       dd->ipath_piobcnt4k * dd->ipath_4kalign;
+       }
 
        for (bits = 0; !(piolen & (1ULL << bits)); bits++)
                /* do nothing */ ;
@@ -122,6 +140,8 @@ int ipath_enable_wc(struct ipath_devdata *dd)
                        ipath_cdbg(VERBOSE, "Set mtrr for chip to WC, "
                                   "cookie is %d\n", cookie);
                        dd->ipath_wc_cookie = cookie;
+                       dd->ipath_wc_base = (unsigned long) pioaddr;
+                       dd->ipath_wc_len = (unsigned long) piolen;
                }
        }
 
@@ -135,9 +155,16 @@ int ipath_enable_wc(struct ipath_devdata *dd)
 void ipath_disable_wc(struct ipath_devdata *dd)
 {
        if (dd->ipath_wc_cookie) {
+               int r;
                ipath_cdbg(VERBOSE, "undoing WCCOMB on pio buffers\n");
-               mtrr_del(dd->ipath_wc_cookie, 0, 0);
-               dd->ipath_wc_cookie = 0;
+               r = mtrr_del(dd->ipath_wc_cookie, dd->ipath_wc_base,
+                            dd->ipath_wc_len);
+               if (r < 0)
+                       dev_info(&dd->pcidev->dev,
+                                "mtrr_del(%lx, %lx, %lx) failed: %d\n",
+                                dd->ipath_wc_cookie, dd->ipath_wc_base,
+                                dd->ipath_wc_len, r);
+               dd->ipath_wc_cookie = 0; /* even on failure */
        }
 }