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Date: Fri, 11 Jul 2008 15:17:44 -0700
From: Jeff Kirsher <jeffrey.t.kirsher@...el.com>
To: jeff@...zik.org
Cc: davem@...emloft.net, netdev@...r.kernel.org,
Tomohiro Kusumi <kusumi.tomohiro@...fujitsu.com>,
Auke Kok <auke-jan.h.kok@...el.com>,
Taku Izumi <izumi.taku@...fujitsu.com>,
Jeff Kirsher <jeffrey.t.kirsher@...el.com>
Subject: [NET-NEXT PATCH 9/9] e1000: make ioport free
From: Taku Izumi <izumi.taku@...fugitsu.com>
This patch makes e1000 driver ioport-free.
This corrects behavior in probe function so as not to request ioport
resources as long as they are not really needed. This is based on the
ioport-free patch of e1000 driver from Auke Kok and Tomohiro Kusumi.
Signed-off-by: Tomohiro Kusumi <kusumi.tomohiro@...fujitsu.com>
Signed-off-by: Auke Kok <auke-jan.h.kok@...el.com>
Signed-off-by: Taku Izumi <izumi.taku@...fujitsu.com>
Signed-off-by: Jeff Kirsher<jeffrey.t.kirsher@...el.com>
---
drivers/net/e1000/e1000.h | 4 ++
drivers/net/e1000/e1000_main.c | 83 ++++++++++++++++++++++++++++++++++------
2 files changed, 74 insertions(+), 13 deletions(-)
diff --git a/drivers/net/e1000/e1000.h b/drivers/net/e1000/e1000.h
index 583b823..19e317e 100644
--- a/drivers/net/e1000/e1000.h
+++ b/drivers/net/e1000/e1000.h
@@ -340,6 +340,10 @@ struct e1000_adapter {
bool quad_port_a;
unsigned long flags;
u32 eeprom_wol;
+
+ /* for ioport free */
+ int bars;
+ int need_ioport;
};
enum e1000_state_t {
diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index 19ac606..a7d6249 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -859,6 +859,42 @@ static void e1000_dump_eeprom(struct e1000_adapter *adapter)
}
/**
+ * e1000_is_need_ioport - determine if an adapter needs ioport resources or not
+ * @pdev: PCI device information struct
+ *
+ * Return true if an adapter needs ioport resources
+ **/
+static int e1000_is_need_ioport(struct pci_dev *pdev)
+{
+ switch (pdev->device) {
+ case E1000_DEV_ID_82540EM:
+ case E1000_DEV_ID_82540EM_LOM:
+ case E1000_DEV_ID_82540EP:
+ case E1000_DEV_ID_82540EP_LOM:
+ case E1000_DEV_ID_82540EP_LP:
+ case E1000_DEV_ID_82541EI:
+ case E1000_DEV_ID_82541EI_MOBILE:
+ case E1000_DEV_ID_82541ER:
+ case E1000_DEV_ID_82541ER_LOM:
+ case E1000_DEV_ID_82541GI:
+ case E1000_DEV_ID_82541GI_LF:
+ case E1000_DEV_ID_82541GI_MOBILE:
+ case E1000_DEV_ID_82544EI_COPPER:
+ case E1000_DEV_ID_82544EI_FIBER:
+ case E1000_DEV_ID_82544GC_COPPER:
+ case E1000_DEV_ID_82544GC_LOM:
+ case E1000_DEV_ID_82545EM_COPPER:
+ case E1000_DEV_ID_82545EM_FIBER:
+ case E1000_DEV_ID_82546EB_COPPER:
+ case E1000_DEV_ID_82546EB_FIBER:
+ case E1000_DEV_ID_82546EB_QUAD_COPPER:
+ return true;
+ default:
+ return false;
+ }
+}
+
+/**
* e1000_probe - Device Initialization Routine
* @pdev: PCI device information struct
* @ent: entry in e1000_pci_tbl
@@ -869,7 +905,6 @@ static void e1000_dump_eeprom(struct e1000_adapter *adapter)
* The OS initialization, configuring of the adapter private structure,
* and a hardware reset occur.
**/
-
static int __devinit e1000_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
@@ -882,9 +917,18 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
int i, err, pci_using_dac;
u16 eeprom_data = 0;
u16 eeprom_apme_mask = E1000_EEPROM_APME;
+ int bars, need_ioport;
DECLARE_MAC_BUF(mac);
- err = pci_enable_device(pdev);
+ /* do not allocate ioport bars when not needed */
+ need_ioport = e1000_is_need_ioport(pdev);
+ if (need_ioport) {
+ bars = pci_select_bars(pdev, IORESOURCE_MEM | IORESOURCE_IO);
+ err = pci_enable_device(pdev);
+ } else {
+ bars = pci_select_bars(pdev, IORESOURCE_MEM);
+ err = pci_enable_device(pdev);
+ }
if (err)
return err;
@@ -904,7 +948,7 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
pci_using_dac = 0;
}
- err = pci_request_regions(pdev, e1000_driver_name);
+ err = pci_request_selected_regions(pdev, bars, e1000_driver_name);
if (err)
goto err_pci_reg;
@@ -922,6 +966,8 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
adapter->netdev = netdev;
adapter->pdev = pdev;
adapter->msg_enable = (1 << debug) - 1;
+ adapter->bars = bars;
+ adapter->need_ioport = need_ioport;
hw = &adapter->hw;
hw->back = adapter;
@@ -932,12 +978,14 @@ static int __devinit e1000_probe(struct pci_dev *pdev,
if (!hw->hw_addr)
goto err_ioremap;
- for (i = BAR_1; i <= BAR_5; i++) {
- if (pci_resource_len(pdev, i) == 0)
- continue;
- if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
- hw->io_base = pci_resource_start(pdev, i);
- break;
+ if (adapter->need_ioport) {
+ for (i = BAR_1; i <= BAR_5; i++) {
+ if (pci_resource_len(pdev, i) == 0)
+ continue;
+ if (pci_resource_flags(pdev, i) & IORESOURCE_IO) {
+ hw->io_base = pci_resource_start(pdev, i);
+ break;
+ }
}
}
@@ -1202,7 +1250,7 @@ err_sw_init:
err_ioremap:
free_netdev(netdev);
err_alloc_etherdev:
- pci_release_regions(pdev);
+ pci_release_selected_regions(pdev, bars);
err_pci_reg:
err_dma:
pci_disable_device(pdev);
@@ -1249,7 +1297,7 @@ static void __devexit e1000_remove(struct pci_dev *pdev)
iounmap(hw->hw_addr);
if (hw->flash_address)
iounmap(hw->flash_address);
- pci_release_regions(pdev);
+ pci_release_selected_regions(pdev, adapter->bars);
free_netdev(netdev);
@@ -5038,7 +5086,11 @@ static int e1000_resume(struct pci_dev *pdev)
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
- err = pci_enable_device(pdev);
+
+ if (adapter->need_ioport)
+ err = pci_enable_device(pdev);
+ else
+ err = pci_enable_device_mem(pdev);
if (err) {
printk(KERN_ERR "e1000: Cannot enable PCI device from suspend\n");
return err;
@@ -5134,8 +5186,13 @@ static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
struct net_device *netdev = pci_get_drvdata(pdev);
struct e1000_adapter *adapter = netdev->priv;
struct e1000_hw *hw = &adapter->hw;
+ int err;
- if (pci_enable_device(pdev)) {
+ if (adapter->need_ioport)
+ err = pci_enable_device(pdev);
+ else
+ err = pci_enable_device_mem(pdev);
+ if (err) {
printk(KERN_ERR "e1000: Cannot re-enable PCI device after reset.\n");
return PCI_ERS_RESULT_DISCONNECT;
}
--
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