/*
* Intel I/OAT DMA Linux driver
* Copyright(c) 2007 - 2009 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,
* version 2, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
*/
/*
* This driver supports an Intel I/OAT DMA engine, which does asynchronous
* copy operations.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <linux/interrupt.h>
#include <linux/dca.h>
#include "dma.h"
#include "dma_v2.h"
#include "registers.h"
#include "hw.h"
MODULE_VERSION(IOAT_DMA_VERSION);
MODULE_LICENSE("Dual BSD/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) },
/* I/OAT v3 platforms */
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) },
{ PCI_DEVICE(PCI_VENDOR_ID_INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) },
{ 0, }
};
static int __devinit ioat_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *id);
static void __devexit ioat_remove(struct pci_dev *pdev);
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)");
#define DRV_NAME "ioatdma"
static struct pci_driver ioat_pci_driver = {
.name = DRV_NAME,
.id_table = ioat_pci_tbl,
.probe = ioat_pci_probe,
.remove = __devexit_p(ioat_remove),
};
static struct ioatdma_device *
alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
{
struct device *dev = &pdev->dev;
struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
if (!d)
return NULL;
d->pdev = pdev;
d->reg_base = iobase;
return d;
}
static int __devinit ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
void __iomem * const *iomap;
struct device *dev = &pdev->dev;
struct ioatdma_device *device;
int err;
err = pcim_enable_device(pdev);
if (err)
return err;
err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME);
if (err)
return err;
iomap = pcim_iomap_table(pdev);
if (!iomap)
return -ENOMEM;
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
if (err)
err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
if (err)
return err;
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
if (err)
err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
if (err)
return err;
device = devm_kzalloc(dev, sizeof(*device), GFP_KERNEL);
if (!device)
return -ENOMEM;
pci_set_master(pdev);
device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);
if (!device)
return -ENOMEM;
pci_set_drvdata(pdev, device);
device->version = readb(device->reg_base + IOAT_VER_OFFSET);
if (device->version == IOAT_VER_1_2)
err = ioat1_dma_probe(device, ioat_dca_enabled);
else if (device->version == IOAT_VER_2_0)
err = ioat2_dma_probe(device, ioat_dca_enabled);
else if (device->version >= IOAT_VER_3_0)
err = ioat3_dma_probe(device, ioat_dca_enabled);
else
return -ENODEV;
if (err) {
dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
return -ENODEV;
}
return 0;
}
static void __devexit ioat_remove(struct pci_dev *pdev)
{
struct ioatdma_device *device = pci_get_drvdata(pdev);
if (!device)
return;
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;
}
ioat_dma_remove(device);
}
static int __init ioat_init_module(void)
{
pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
DRV_NAME, IOAT_DMA_VERSION);
return pci_register_driver(&ioat_pci_driver);
}
module_init(ioat_init_module);
static void __exit ioat_exit_module(void)
{
pci_unregister_driver(&ioat_pci_driver);
}
module_exit(ioat_exit_module);
