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0132bcef76
These should be good for the IOAT DMA devices on the Intel Atom S1269, S1279, and S1289 platforms. We are also adding IOAT v3.3 definition for the new DMA engine. Signed-off-by: Dave Jiang <dave.jiang@intel.com> Acked-by: Dan Williams <djbw@fb.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
245 lines
7.6 KiB
C
245 lines
7.6 KiB
C
/*
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* Intel I/OAT DMA Linux driver
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* Copyright(c) 2007 - 2009 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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*/
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/*
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* This driver supports an Intel I/OAT DMA engine, which does asynchronous
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* copy operations.
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <linux/interrupt.h>
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#include <linux/dca.h>
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#include <linux/slab.h>
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#include "dma.h"
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#include "dma_v2.h"
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#include "registers.h"
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#include "hw.h"
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MODULE_VERSION(IOAT_DMA_VERSION);
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MODULE_LICENSE("Dual BSD/GPL");
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MODULE_AUTHOR("Intel Corporation");
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static struct pci_device_id ioat_pci_tbl[] = {
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/* I/OAT v1 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) },
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{ PCI_VDEVICE(UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) },
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/* I/OAT v2 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) },
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/* I/OAT v3 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) },
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/* I/OAT v3.2 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW3) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW4) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW5) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW6) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW7) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW8) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW9) },
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/* I/OAT v3.3 platforms */
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD0) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD1) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD2) },
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{ PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD3) },
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{ 0, }
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};
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MODULE_DEVICE_TABLE(pci, ioat_pci_tbl);
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static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id);
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static void ioat_remove(struct pci_dev *pdev);
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static int ioat_dca_enabled = 1;
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module_param(ioat_dca_enabled, int, 0644);
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MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
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struct kmem_cache *ioat2_cache;
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#define DRV_NAME "ioatdma"
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static struct pci_driver ioat_pci_driver = {
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.name = DRV_NAME,
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.id_table = ioat_pci_tbl,
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.probe = ioat_pci_probe,
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.remove = ioat_remove,
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};
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static struct ioatdma_device *
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alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
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{
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struct device *dev = &pdev->dev;
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struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
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if (!d)
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return NULL;
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d->pdev = pdev;
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d->reg_base = iobase;
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return d;
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}
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static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
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{
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void __iomem * const *iomap;
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struct device *dev = &pdev->dev;
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struct ioatdma_device *device;
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int err;
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err = pcim_enable_device(pdev);
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if (err)
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return err;
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err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME);
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if (err)
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return err;
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iomap = pcim_iomap_table(pdev);
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if (!iomap)
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return -ENOMEM;
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err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
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if (err)
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err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
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if (err)
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return err;
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err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
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if (err)
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err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
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if (err)
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return err;
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device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);
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if (!device)
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return -ENOMEM;
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pci_set_master(pdev);
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pci_set_drvdata(pdev, device);
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device->version = readb(device->reg_base + IOAT_VER_OFFSET);
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if (device->version == IOAT_VER_1_2)
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err = ioat1_dma_probe(device, ioat_dca_enabled);
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else if (device->version == IOAT_VER_2_0)
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err = ioat2_dma_probe(device, ioat_dca_enabled);
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else if (device->version >= IOAT_VER_3_0)
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err = ioat3_dma_probe(device, ioat_dca_enabled);
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else
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return -ENODEV;
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if (err) {
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dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
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return -ENODEV;
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}
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return 0;
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}
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static void ioat_remove(struct pci_dev *pdev)
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{
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struct ioatdma_device *device = pci_get_drvdata(pdev);
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if (!device)
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return;
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dev_err(&pdev->dev, "Removing dma and dca services\n");
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if (device->dca) {
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unregister_dca_provider(device->dca, &pdev->dev);
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free_dca_provider(device->dca);
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device->dca = NULL;
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}
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ioat_dma_remove(device);
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}
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static int __init ioat_init_module(void)
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{
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int err;
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pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
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DRV_NAME, IOAT_DMA_VERSION);
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ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent),
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0, SLAB_HWCACHE_ALIGN, NULL);
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if (!ioat2_cache)
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return -ENOMEM;
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err = pci_register_driver(&ioat_pci_driver);
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if (err)
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kmem_cache_destroy(ioat2_cache);
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return err;
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}
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module_init(ioat_init_module);
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static void __exit ioat_exit_module(void)
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{
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pci_unregister_driver(&ioat_pci_driver);
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kmem_cache_destroy(ioat2_cache);
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}
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module_exit(ioat_exit_module);
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