diff mbox

[v1,21/47] ethernet: myri10ge: use arch_phys_wc_add()

Message ID 1426893517-2511-22-git-send-email-mcgrof@do-not-panic.com
State Not Applicable, archived
Delegated to: David Miller
Headers show

Commit Message

Luis R. Rodriguez March 20, 2015, 11:18 p.m. UTC 
From: "Luis R. Rodriguez" <mcgrof@suse.com>

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

Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.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: Hyong-Youb Kim <hykim@myri.com>
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
Signed-off-by: Luis R. Rodriguez <mcgrof@suse.com>
---
 drivers/net/ethernet/myricom/myri10ge/myri10ge.c | 36 ++++++------------------
 1 file changed, 8 insertions(+), 28 deletions(-)

Comments

Hyong-Youb Kim March 21, 2015, 7:08 a.m. UTC | #1 
On Fri, Mar 20, 2015 at 04:18:11PM -0700, Luis R. Rodriguez wrote:
> From: "Luis R. Rodriguez" <mcgrof@suse.com>
> 
> This driver already uses ioremap_wc() on the same range
> so when write-combining is available that will be used
> instead.
> 
[...]
> --- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
> +++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
[...]
> @@ -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;

You would have to delete "WC from myri10ge_gstrings_main_stats too.
Something like below.  Thanks.

@@ -1905,7 +1905,7 @@ 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
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Luis R. Rodriguez March 27, 2015, 8:36 p.m. UTC | #2 
On Sat, Mar 21, 2015 at 04:08:00PM +0900, Hyong-Youb Kim wrote:
> On Fri, Mar 20, 2015 at 04:18:11PM -0700, Luis R. Rodriguez wrote:
> > From: "Luis R. Rodriguez" <mcgrof@suse.com>
> > 
> > This driver already uses ioremap_wc() on the same range
> > so when write-combining is available that will be used
> > instead.
> > 
> [...]
> > --- a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
> > +++ b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
> [...]
> > @@ -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;
> 
> You would have to delete "WC from myri10ge_gstrings_main_stats too.
> Something like below.  Thanks.
> 
> @@ -1905,7 +1905,7 @@ 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

OK great thanks. Amended.

  Luis
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diff mbox

Patch

diff --git a/drivers/net/ethernet/myricom/myri10ge/myri10ge.c b/drivers/net/ethernet/myricom/myri10ge/myri10ge.c
index 1412f5a..01e4069 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;
@@ -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),