Hi
As you can see in the "10. pci_enable_device_bars() and Legacy I/O
Port space" of the Documentation/pci.txt, the latest kernel has
interfaces for PCI device drivers to tell the kernel which resource
the driver want to use, ex. I/O port or MMIO.
I've made a patch which makes Emulex lpfc driver legacy I/O port
free by using the PCI core changes I mentioned above. The Emulex
lpfc driver can handle some of its devices without using I/O port.
So this patch changes the driver not to enable/request I/O port
region.
As a result, the driver can handle its device even when there are
huge number of PCI devices being used on the system and no I/O
port region assigned to the device.
Tomohiro Kusumi
Signed-off-by: Tomohiro Kusumi <[email protected]>
---
lpfc_init.c | 10 ++++++----
1 files changed, 6 insertions(+), 4 deletions(-)
diff -uprN linux-2.6.21.orig/drivers/scsi/lpfc/lpfc_init.c linux-2.6.21/drivers/scsi/lpfc/lpfc_init.c
--- linux-2.6.21.orig/drivers/scsi/lpfc/lpfc_init.c 2007-04-26 12:08:32.000000000 +0900
+++ linux-2.6.21/drivers/scsi/lpfc/lpfc_init.c 2007-05-09 18:22:10.000000000 +0900
@@ -1419,10 +1419,11 @@ lpfc_pci_probe_one(struct pci_dev *pdev,
int error = -ENODEV, retval;
int i;
uint16_t iotag;
+ int bars = pci_select_bars(pdev, IORESOURCE_MEM);
- if (pci_enable_device(pdev))
+ if (pci_enable_device_bars(pdev, bars))
goto out;
- if (pci_request_regions(pdev, LPFC_DRIVER_NAME))
+ if (pci_request_selected_regions(pdev, bars, LPFC_DRIVER_NAME))
goto out_disable_device;
host = scsi_host_alloc(&lpfc_template, sizeof (struct lpfc_hba));
@@ -1734,7 +1735,7 @@ out_put_host:
phba->host = NULL;
scsi_host_put(host);
out_release_regions:
- pci_release_regions(pdev);
+ pci_release_selected_regions(pdev, bars);
out_disable_device:
pci_disable_device(pdev);
out:
@@ -1748,6 +1749,7 @@ lpfc_pci_remove_one(struct pci_dev *pdev
struct Scsi_Host *host = pci_get_drvdata(pdev);
struct lpfc_hba *phba = (struct lpfc_hba *)host->hostdata;
unsigned long iflag;
+ int bars = pci_select_bars(pdev, IORESOURCE_MEM);
lpfc_free_sysfs_attr(phba);
@@ -1792,7 +1794,7 @@ lpfc_pci_remove_one(struct pci_dev *pdev
iounmap(phba->ctrl_regs_memmap_p);
iounmap(phba->slim_memmap_p);
- pci_release_regions(phba->pcidev);
+ pci_release_selected_regions(phba->pcidev, bars);
pci_disable_device(phba->pcidev);
idr_remove(&lpfc_hba_index, phba->brd_no);