ethernet: myri10ge: use arch_phys_wc_add()

This driver already uses ioremap_wc() on the same range
so when write-combining is available that will be used
instead.

Cc: Hyong-Youb Kim <hykim@myri.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Suresh Siddha <sbsiddha@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Juergen Gross <jgross@suse.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: netdev@vger.kernel.org
Cc: Juergen Gross <jgross@suse.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Dave Airlie <airlied@redhat.com>
Cc: Antonino Daplas <adaplas@gmail.com>
Cc: Jean-Christophe Plagniol-Villard <plagnioj@jcrosoft.com>
Cc: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: linux-kernel@vger.kernel.org
Cc: netdev@vger.kernel.org
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 9 insertions, 29 deletions

diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
index 1412f5af05ec..2bae50292dcd 100644
--- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
+++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
@@ -69,11 +69,7 @@
 #include <net/ip.h>
 #include <net/tcp.h>
 #include <asm/byteorder.h>
-#include <asm/io.h>
 #include <asm/processor.h>
-#ifdef CONFIG_MTRR
-#include <asm/mtrr.h>
-#endif
 #include <net/busy_poll.h>
 
 #include "myri10ge_mcp.h"
@@ -242,8 +238,7 @@ struct myri10ge_priv {
         unsigned int rdma_tags_available;
         int intr_coal_delay;
         __be32 __iomem *intr_coal_delay_ptr;
-        int mtrr;
-        int wc_enabled;
+        int wc_cookie;
         int down_cnt;
         wait_queue_head_t down_wq;
         struct work_struct watchdog_work;
@@ -1905,7 +1900,7 @@ static const char myri10ge_gstrings_main_stats[][ETH_GSTRING_LEN] = {
         "tx_aborted_errors", "tx_carrier_errors", "tx_fifo_errors",
         "tx_heartbeat_errors", "tx_window_errors",
         /* device-specific stats */
-        "tx_boundary", "WC", "irq", "MSI", "MSIX",
+        "tx_boundary", "irq", "MSI", "MSIX",
         "read_dma_bw_MBs", "write_dma_bw_MBs", "read_write_dma_bw_MBs",
         "serial_number", "watchdog_resets",
 #ifdef CONFIG_MYRI10GE_DCA
@@ -1984,7 +1979,6 @@ myri10ge_get_ethtool_stats(struct net_device *netdev,
                 data[i] = ((u64 *)&link_stats)[i];
 
         data[i++] = (unsigned int)mgp->tx_boundary;
-        data[i++] = (unsigned int)mgp->wc_enabled;
         data[i++] = (unsigned int)mgp->pdev->irq;
         data[i++] = (unsigned int)mgp->msi_enabled;
         data[i++] = (unsigned int)mgp->msix_enabled;
@@ -4040,14 +4034,7 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 
         mgp->board_span = pci_resource_len(pdev, 0);
         mgp->iomem_base = pci_resource_start(pdev, 0);
-        mgp->mtrr = -1;
-        mgp->wc_enabled = 0;
-#ifdef CONFIG_MTRR
-        mgp->mtrr = mtrr_add(mgp->iomem_base, mgp->board_span,
-                             MTRR_TYPE_WRCOMB, 1);
-        if (mgp->mtrr >= 0)
-                mgp->wc_enabled = 1;
-#endif
+        mgp->wc_cookie = arch_phys_wc_add(mgp->iomem_base, mgp->board_span);
         mgp->sram = ioremap_wc(mgp->iomem_base, mgp->board_span);
         if (mgp->sram == NULL) {
                 dev_err(&pdev->dev, "ioremap failed for %ld bytes at 0x%lx\n",
@@ -4146,14 +4133,14 @@ static int myri10ge_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
                 goto abort_with_state;
         }
         if (mgp->msix_enabled)
-                dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, WC %s\n",
+                dev_info(dev, "%d MSI-X IRQs, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
                          mgp->num_slices, mgp->tx_boundary, mgp->fw_name,
-                         (mgp->wc_enabled ? "Enabled" : "Disabled"));
+                         (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
         else
-                dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, WC %s\n",
+                dev_info(dev, "%s IRQ %d, tx bndry %d, fw %s, MTRR %s, WC Enabled\n",
                          mgp->msi_enabled ? "MSI" : "xPIC",
                          pdev->irq, mgp->tx_boundary, mgp->fw_name,
-                         (mgp->wc_enabled ? "Enabled" : "Disabled"));
+                         (mgp->wc_cookie > 0 ? "Enabled" : "Disabled"));
 
         board_number++;
         return 0;
@@ -4175,10 +4162,7 @@ abort_with_ioremap:
         iounmap(mgp->sram);
 
 abort_with_mtrr:
-#ifdef CONFIG_MTRR
-        if (mgp->mtrr >= 0)
-                mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
-#endif
+        arch_phys_wc_del(mgp->wc_cookie);
         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),
                           mgp->cmd, mgp->cmd_bus);
 
@@ -4220,11 +4204,7 @@ static void myri10ge_remove(struct pci_dev *pdev)
         pci_restore_state(pdev);
 
         iounmap(mgp->sram);
-
-#ifdef CONFIG_MTRR
-        if (mgp->mtrr >= 0)
-                mtrr_del(mgp->mtrr, mgp->iomem_base, mgp->board_span);
-#endif
+        arch_phys_wc_del(mgp->wc_cookie);
         myri10ge_free_slices(mgp);
         kfree(mgp->msix_vectors);
         dma_free_coherent(&pdev->dev, sizeof(*mgp->cmd),