On Wed, Jul 18, 2012 at 12:40:47PM +0200, Dominic Eschweiler wrote:
> Am Montag, den 16.07.2012, 23:58 +0200 schrieb Hans J. Koch:
> > Try to hack up a patch to add generic BAR mapping to uio_pci_generic.c
> > and post it for review.
> >
>
> Here we go ...
Great! I'm a bit under time pressure with my current work ATM. A call to
open("/dev/hansjkoch", O_NONBLOCK) only returns -EBUSY. So it'll take me one or
two days to review it thoroughly. But at first sight, it is what I had in mind.
You'll hear from me soon, thanks for your work! Comments and reviews from
others are welcome...
Hans
> >
> Signed-off-by: Dominic Eschweiler <eschwei...@fias.uni-frankfurt.de>
> diff --git a/drivers/uio/uio_pci_generic.c
> b/drivers/uio/uio_pci_generic.c
> index 0bd08ef..e25991e 100644
> --- a/drivers/uio/uio_pci_generic.c
> +++ b/drivers/uio/uio_pci_generic.c
> @@ -25,10 +25,12 @@
> #include <linux/slab.h>
> #include <linux/uio_driver.h>
>
> -#define DRIVER_VERSION "0.01.0"
> +#define DRIVER_VERSION "0.02.0"
> #define DRIVER_AUTHOR "Michael S. Tsirkin <m...@redhat.com>"
> #define DRIVER_DESC "Generic UIO driver for PCI 2.3 devices"
>
> +#define DRV_NAME "uio_pci_generic"
> +
> struct uio_pci_generic_dev {
> struct uio_info info;
> struct pci_dev *pdev;
> @@ -58,6 +60,7 @@ static int __devinit probe(struct pci_dev *pdev,
> {
> struct uio_pci_generic_dev *gdev;
> int err;
> + int i;
>
> err = pci_enable_device(pdev);
> if (err) {
> @@ -67,8 +70,7 @@ static int __devinit probe(struct pci_dev *pdev,
> }
>
> if (!pdev->irq) {
> - dev_warn(&pdev->dev, "No IRQ assigned to device: "
> - "no support for interrupts?\n");
> + dev_warn(&pdev->dev, "No IRQ assigned to device: no support for
> interrupts?\n");
> pci_disable_device(pdev);
> return -ENODEV;
> }
> @@ -91,10 +93,31 @@ static int __devinit probe(struct pci_dev *pdev,
> gdev->info.handler = irqhandler;
> gdev->pdev = pdev;
>
> + /* request regions */
> + err = pci_request_regions(pdev, DRV_NAME);
> + if (err) {
> + dev_err(&pdev->dev, "Couldn't get PCI resources, aborting\n");
> + return err;
> + }
> +
> + /* create attributes for BAR mappings */
> + for (i = 0; i < PCI_NUM_RESOURCES; i++) {
> + if (pdev->resource[i].flags &&
> + (pdev->resource[i].flags & IORESOURCE_MEM)) {
> + gdev->info.mem[i].addr = pci_resource_start(pdev, i);
> + gdev->info.mem[i].size = pci_resource_len(pdev, i);
> + gdev->info.mem[i].internal_addr = NULL;
> + gdev->info.mem[i].memtype = UIO_MEM_PHYS;
> + }
> + }
> +
> if (uio_register_device(&pdev->dev, &gdev->info))
> goto err_register;
> pci_set_drvdata(pdev, gdev);
>
> + pr_info("UIO_PCI_GENERIC : initialized new device (%x %x)\n",
> + pdev->vendor, pdev->device);
> +
> return 0;
> err_register:
> kfree(gdev);
> @@ -107,17 +130,21 @@ err_verify:
> static void remove(struct pci_dev *pdev)
> {
> struct uio_pci_generic_dev *gdev = pci_get_drvdata(pdev);
> -
> uio_unregister_device(&gdev->info);
> +
> + pci_release_regions(pdev);
> pci_disable_device(pdev);
> kfree(gdev);
> +
> + pr_info("UIO_PCI_GENERIC : removed device (%x %x)\n",
> + pdev->vendor, pdev->device);
> }
>
> static struct pci_driver driver = {
> - .name = "uio_pci_generic",
> + .name = DRV_NAME,
> .id_table = NULL, /* only dynamic id's */
> - .probe = probe,
> - .remove = remove,
> + .probe = probe,
> + .remove = remove,
> };
>
> static int __init init(void)
>
> --
> Gruß
> Dominic
>
> Frankfurt Institute for Advanced Studies (FIAS)
> Ruth-Moufang-Straße 1
> D-60438 Frankfurt am Main
> Germany
>
> Phone: +49 69 79844114
>
>
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