/*
* Intel I/OAT DMA Linux driver
- * Copyright(c) 2004 - 2007 Intel Corporation.
+ * Copyright(c) 2007 Intel Corporation.
*
* This program is free software; you can redistribute it and/or modify it
* under the terms and conditions of the GNU General Public License,
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
+#include <linux/dca.h>
#include "ioatdma.h"
#include "ioatdma_registers.h"
#include "ioatdma_hw.h"
-MODULE_VERSION("1.24");
+MODULE_VERSION(IOAT_DMA_VERSION);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Intel Corporation");
static struct pci_device_id ioat_pci_tbl[] = {
+ /* I/OAT v1 platforms */
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) },
{ PCI_DEVICE(PCI_VENDOR_ID_UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) },
+
+ /* I/OAT v2 platforms */
+ { PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) },
{ 0, }
};
struct pci_dev *pdev;
void __iomem *iobase;
struct ioatdma_device *dma;
+ struct dca_provider *dca;
};
static int __devinit ioat_probe(struct pci_dev *pdev,
const struct pci_device_id *id);
-#ifdef IOAT_DMA_REMOVE
static void __devexit ioat_remove(struct pci_dev *pdev);
-#endif
+
+static int ioat_dca_enabled = 1;
+module_param(ioat_dca_enabled, int, 0644);
+MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
static int ioat_setup_functionality(struct pci_dev *pdev, void __iomem *iobase)
{
switch (version) {
case IOAT_VER_1_2:
device->dma = ioat_dma_probe(pdev, iobase);
+ if (device->dma && ioat_dca_enabled)
+ device->dca = ioat_dca_init(pdev, iobase);
+ break;
+ case IOAT_VER_2_0:
+ device->dma = ioat_dma_probe(pdev, iobase);
+ if (device->dma && ioat_dca_enabled)
+ device->dca = ioat2_dca_init(pdev, iobase);
break;
default:
err = -ENODEV;
break;
}
+ if (!device->dma)
+ err = -ENODEV;
return err;
}
{
struct ioat_device *device = pci_get_drvdata(pdev);
+ dev_err(&pdev->dev, "Removing dma and dca services\n");
+ if (device->dca) {
+ unregister_dca_provider(device->dca);
+ free_dca_provider(device->dca);
+ device->dca = NULL;
+ }
+
if (device->dma) {
ioat_dma_remove(device->dma);
device->dma = NULL;
}
}
-static struct pci_driver ioat_pci_drv = {
+static struct pci_driver ioat_pci_driver = {
.name = "ioatdma",
.id_table = ioat_pci_tbl,
.probe = ioat_probe,
.shutdown = ioat_shutdown_functionality,
-#ifdef IOAT_DMA_REMOVE
.remove = __devexit_p(ioat_remove),
-#endif
};
static int __devinit ioat_probe(struct pci_dev *pdev,
if (err)
goto err_enable_device;
- err = pci_request_regions(pdev, ioat_pci_drv.name);
+ err = pci_request_regions(pdev, ioat_pci_driver.name);
if (err)
goto err_request_regions;
return err;
}
-#ifdef IOAT_DMA_REMOVE
/*
* It is unsafe to remove this module: if removed while a requested
* dma is outstanding, esp. from tcp, it is possible to hang while
- * waiting for something that will never finish, thus hanging at
- * least one cpu. However, if you're feeling lucky and need to do
- * some testing, this usually works just fine.
+ * waiting for something that will never finish. However, if you're
+ * feeling lucky, this usually works just fine.
*/
static void __devexit ioat_remove(struct pci_dev *pdev)
{
ioat_shutdown_functionality(pdev);
kfree(device);
-
- iounmap(device->iobase);
- pci_release_regions(pdev);
- pci_disable_device(pdev);
}
-#endif
static int __init ioat_init_module(void)
{
- return pci_register_driver(&ioat_pci_drv);
+ return pci_register_driver(&ioat_pci_driver);
}
module_init(ioat_init_module);
static void __exit ioat_exit_module(void)
{
- pci_unregister_driver(&ioat_pci_drv);
+ pci_unregister_driver(&ioat_pci_driver);
}
module_exit(ioat_exit_module);