| /* |
| * 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_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) }, |
| { PCI_VDEVICE(UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) }, |
| |
| /* I/OAT v2 platforms */ |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) }, |
| |
| /* I/OAT v3 platforms */ |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) }, |
| |
| /* I/OAT v3.2 platforms */ |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) }, |
| { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) }, |
| |
| { 0, } |
| }; |
| MODULE_DEVICE_TABLE(pci, ioat_pci_tbl); |
| |
| 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)"); |
| |
| struct kmem_cache *ioat2_cache; |
| |
| #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, &pdev->dev); |
| free_dca_provider(device->dca); |
| device->dca = NULL; |
| } |
| ioat_dma_remove(device); |
| } |
| |
| static int __init ioat_init_module(void) |
| { |
| int err; |
| |
| pr_info("%s: Intel(R) QuickData Technology Driver %s\n", |
| DRV_NAME, IOAT_DMA_VERSION); |
| |
| ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent), |
| 0, SLAB_HWCACHE_ALIGN, NULL); |
| if (!ioat2_cache) |
| return -ENOMEM; |
| |
| err = pci_register_driver(&ioat_pci_driver); |
| if (err) |
| kmem_cache_destroy(ioat2_cache); |
| |
| return err; |
| } |
| module_init(ioat_init_module); |
| |
| static void __exit ioat_exit_module(void) |
| { |
| pci_unregister_driver(&ioat_pci_driver); |
| kmem_cache_destroy(ioat2_cache); |
| } |
| module_exit(ioat_exit_module); |