Commit 900fd17d authored by John W. Linville's avatar John W. Linville Committed by Linus Torvalds
Browse files

[PATCH] 3c59x: enable use of memory-mapped PCI I/O 



Add capability for 3c59x driver to use memory-mapped PCI I/O resources.
This may improve performance for those devices so equipped.  This will be
the default behaviour for IS_CYCLONE and IS_TORNADO devices.  Additionally,
it can be enabled/disabled individually for up to MAX_UNITS number of
devices via the use_mmio module option or for all units via the
global_use_mmio option.  The use_mmio option overrides the global_use_mmio
option for those devices specified.

Signed-off-by: default avatarJohn W. Linville <linville@tuxdriver.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 35b30674

drivers/net/3c59x.c

+26 −3
Original line number Diff line number Diff line
@@ -908,9 +908,11 @@ static int full_duplex[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 }; 
static int hw_checksums[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };

static int flow_ctrl[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };

static int enable_wol[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };

static int use_mmio[MAX_UNITS] = {[0 ... MAX_UNITS-1] = -1 };

static int global_options = -1;

static int global_full_duplex = -1;

static int global_enable_wol = -1;

static int global_use_mmio = -1;



/* #define dev_alloc_skb dev_alloc_skb_debug */
@@ -935,6 +937,8 @@ module_param(compaq_ioaddr, int, 0); 
module_param(compaq_irq, int, 0);

module_param(compaq_device_id, int, 0);

module_param(watchdog, int, 0);

module_param(global_use_mmio, int, 0);

module_param_array(use_mmio, int, NULL, 0);

MODULE_PARM_DESC(debug, "3c59x debug level (0-6)");

MODULE_PARM_DESC(options, "3c59x: Bits 0-3: media type, bit 4: bus mastering, bit 9: full duplex");

MODULE_PARM_DESC(global_options, "3c59x: same as options, but applies to all NICs if options is unset");
@@ -950,6 +954,8 @@ MODULE_PARM_DESC(compaq_ioaddr, "3c59x PCI I/O base address (Compaq BIOS problem 
MODULE_PARM_DESC(compaq_irq, "3c59x PCI IRQ number (Compaq BIOS problem workaround)");

MODULE_PARM_DESC(compaq_device_id, "3c59x PCI device ID (Compaq BIOS problem workaround)");

MODULE_PARM_DESC(watchdog, "3c59x transmit timeout in milliseconds");

MODULE_PARM_DESC(global_use_mmio, "3c59x: same as use_mmio, but applies to all NICs if options is unset");

MODULE_PARM_DESC(use_mmio, "3c59x: use memory-mapped PCI I/O resource (0-1)");



#ifdef CONFIG_NET_POLL_CONTROLLER

static void poll_vortex(struct net_device *dev)
@@ -1109,15 +1115,32 @@ static int __init vortex_eisa_init (void) 
static int __devinit vortex_init_one (struct pci_dev *pdev,

				      const struct pci_device_id *ent)

{

	int rc;

	int rc, unit, pci_bar;

	struct vortex_chip_info *vci;

	void __iomem *ioaddr;



	/* wake up and enable device */		

	rc = pci_enable_device (pdev);

	if (rc < 0)

		goto out;



	rc = vortex_probe1 (&pdev->dev, pci_iomap(pdev, 0, 0),

			    pdev->irq, ent->driver_data, vortex_cards_found);

	unit = vortex_cards_found;



	if (global_use_mmio < 0 && (unit >= MAX_UNITS || use_mmio[unit] < 0)) {

		/* Determine the default if the user didn't override us */

		vci = &vortex_info_tbl[ent->driver_data];

		pci_bar = vci->drv_flags & (IS_CYCLONE | IS_TORNADO) ? 1 : 0;

	} else if (unit < MAX_UNITS && use_mmio[unit] >= 0)

		pci_bar = use_mmio[unit] ? 1 : 0;

	else

		pci_bar = global_use_mmio ? 1 : 0;



	ioaddr = pci_iomap(pdev, pci_bar, 0);

	if (!ioaddr) /* If mapping fails, fall-back to BAR 0... */

		ioaddr = pci_iomap(pdev, 0, 0);



	rc = vortex_probe1(&pdev->dev, ioaddr, pdev->irq,

			   ent->driver_data, unit);

	if (rc < 0) {

		pci_disable_device (pdev);

		goto out;

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