diff options
| -rw-r--r-- | drivers/infiniband/hw/ipath/Kconfig | 3 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_driver.c | 18 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_kernel.h | 4 | ||||
| -rw-r--r-- | drivers/infiniband/hw/ipath/ipath_wc_x86_64.c | 43 |
4 files changed, 26 insertions, 42 deletions
diff --git a/drivers/infiniband/hw/ipath/Kconfig b/drivers/infiniband/hw/ipath/Kconfig index 1d9bb115cbf6..8fe54ff00580 100644 --- a/drivers/infiniband/hw/ipath/Kconfig +++ b/drivers/infiniband/hw/ipath/Kconfig @@ -9,3 +9,6 @@ config INFINIBAND_IPATH as IP-over-InfiniBand as well as with userspace applications (in conjunction with InfiniBand userspace access). For QLogic PCIe QLE based cards, use the QIB driver instead. + + If you have this hardware you will need to boot with PAT disabled + on your x86-64 systems, use the nopat kernel parameter. diff --git a/drivers/infiniband/hw/ipath/ipath_driver.c b/drivers/infiniband/hw/ipath/ipath_driver.c index bd0caedafe99..2d7e503d13cb 100644 --- a/drivers/infiniband/hw/ipath/ipath_driver.c +++ b/drivers/infiniband/hw/ipath/ipath_driver.c @@ -42,6 +42,9 @@ #include <linux/bitmap.h> #include <linux/slab.h> #include <linux/module.h> +#ifdef CONFIG_X86_64 +#include <asm/pat.h> +#endif #include "ipath_kernel.h" #include "ipath_verbs.h" @@ -395,6 +398,14 @@ static int ipath_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) unsigned long long addr; u32 bar0 = 0, bar1 = 0; +#ifdef CONFIG_X86_64 + if (WARN(pat_enabled(), + "ipath needs PAT disabled, boot with nopat kernel parameter\n")) { + ret = -ENODEV; + goto bail; + } +#endif + dd = ipath_alloc_devdata(pdev); if (IS_ERR(dd)) { ret = PTR_ERR(dd); @@ -542,6 +553,7 @@ static int ipath_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) dd->ipath_kregbase = __ioremap(addr, len, (_PAGE_NO_CACHE|_PAGE_WRITETHRU)); #else + /* XXX: split this properly to enable on PAT */ dd->ipath_kregbase = ioremap_nocache(addr, len); #endif @@ -587,12 +599,8 @@ static int ipath_init_one(struct pci_dev *pdev, const struct pci_device_id *ent) ret = ipath_enable_wc(dd); - if (ret) { - ipath_dev_err(dd, "Write combining not enabled " - "(err %d): performance may be poor\n", - -ret); + if (ret) ret = 0; - } ipath_verify_pioperf(dd); diff --git a/drivers/infiniband/hw/ipath/ipath_kernel.h b/drivers/infiniband/hw/ipath/ipath_kernel.h index e08db7020cd4..f0f947122779 100644 --- a/drivers/infiniband/hw/ipath/ipath_kernel.h +++ b/drivers/infiniband/hw/ipath/ipath_kernel.h @@ -463,9 +463,7 @@ struct ipath_devdata { /* offset in HT config space of slave/primary interface block */ u8 ipath_ht_slave_off; /* for write combining settings */ - unsigned long ipath_wc_cookie; - unsigned long ipath_wc_base; - unsigned long ipath_wc_len; + int wc_cookie; /* ref count for each pkey */ atomic_t ipath_pkeyrefs[4]; /* shadow copy of struct page *'s for exp tid pages */ diff --git a/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c b/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c index 4ad0b932df1f..7b6e4c843e19 100644 --- a/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c +++ b/drivers/infiniband/hw/ipath/ipath_wc_x86_64.c @@ -37,7 +37,6 @@ */ #include <linux/pci.h> -#include <asm/mtrr.h> #include <asm/processor.h> #include "ipath_kernel.h" @@ -122,27 +121,14 @@ int ipath_enable_wc(struct ipath_devdata *dd) } if (!ret) { - int cookie; - ipath_cdbg(VERBOSE, "Setting mtrr for chip to WC " - "(addr %llx, len=0x%llx)\n", - (unsigned long long) pioaddr, - (unsigned long long) piolen); - cookie = mtrr_add(pioaddr, piolen, MTRR_TYPE_WRCOMB, 0); - if (cookie < 0) { - { - dev_info(&dd->pcidev->dev, - "mtrr_add() WC for PIO bufs " - "failed (%d)\n", - cookie); - ret = -EINVAL; - } - } else { - 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; - } + dd->wc_cookie = arch_phys_wc_add(pioaddr, piolen); + if (dd->wc_cookie < 0) { + ipath_dev_err(dd, "Seting mtrr failed on PIO buffers\n"); + ret = -ENODEV; + } else if (dd->wc_cookie == 0) + ipath_cdbg(VERBOSE, "Set mtrr for chip to WC not needed\n"); + else + ipath_cdbg(VERBOSE, "Set mtrr for chip to WC\n"); } return ret; @@ -154,16 +140,5 @@ 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"); - 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 */ - } + arch_phys_wc_del(dd->wc_cookie); } |