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Message-ID: <1342608047.4194.0.camel@blech>
Date: Wed, 18 Jul 2012 12:40:47 +0200
From: Dominic Eschweiler <eschweiler@...s.uni-frankfurt.de>
To: "Hans J. Koch" <hjk@...sjkoch.de>
Cc: "Michael S. Tsirkin" <mst@...hat.com>,
Andreas Schallenberg <embedded@....net>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
kvm@...r.kernel.org
Subject: Re: UIO: missing resource mapping
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 ...
>
Signed-off-by: Dominic Eschweiler <eschweiler@...s.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 <mst@...hat.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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