drivers/dma/ioat/pci.c

   1 /*
   2  * Intel I/OAT DMA Linux driver
   3  * Copyright(c) 2007 - 2009 Intel Corporation.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms and conditions of the GNU General Public License,
   7  * version 2, as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  12  * more details.
  13  *
  14  * The full GNU General Public License is included in this distribution in
  15  * the file called "COPYING".
  16  *
  17  */
  18
  19 /*
  20  * This driver supports an Intel I/OAT DMA engine, which does asynchronous
  21  * copy operations.
  22  */
  23
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <linux/pci.h>
  27 #include <linux/interrupt.h>
  28 #include <linux/dca.h>
  29 #include <linux/slab.h>
  30 #include "dma.h"
  31 #include "dma_v2.h"
  32 #include "registers.h"
  33 #include "hw.h"
  34
  35 MODULE_VERSION(IOAT_DMA_VERSION);
  36 MODULE_LICENSE("Dual BSD/GPL");
  37 MODULE_AUTHOR("Intel Corporation");
  38
  39 static struct pci_device_id ioat_pci_tbl[] = {
  40         /* I/OAT v1 platforms */
  41         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT) },
  42         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_CNB)  },
  43         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SCNB) },
  44         { PCI_VDEVICE(UNISYS, PCI_DEVICE_ID_UNISYS_DMA_DIRECTOR) },
  45
  46         /* I/OAT v2 platforms */
  47         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB) },
  48
  49         /* I/OAT v3 platforms */
  50         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG0) },
  51         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG1) },
  52         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG2) },
  53         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG3) },
  54         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG4) },
  55         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG5) },
  56         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG6) },
  57         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_TBG7) },
  58
  59         /* I/OAT v3.2 platforms */
  60         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF0) },
  61         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF1) },
  62         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF2) },
  63         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF3) },
  64         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF4) },
  65         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF5) },
  66         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF6) },
  67         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF7) },
  68         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF8) },
  69         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_JSF9) },
  70
  71         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB0) },
  72         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB1) },
  73         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB2) },
  74         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB3) },
  75         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB4) },
  76         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB5) },
  77         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB6) },
  78         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB7) },
  79         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB8) },
  80         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_SNB9) },
  81
  82         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB0) },
  83         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB1) },
  84         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB2) },
  85         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB3) },
  86         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB4) },
  87         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB5) },
  88         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB6) },
  89         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB7) },
  90         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB8) },
  91         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_IVB9) },
  92
  93         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW0) },
  94         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW1) },
  95         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW2) },
  96         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW3) },
  97         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW4) },
  98         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW5) },
  99         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW6) },
 100         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW7) },
 101         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW8) },
 102         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_HSW9) },
 103
 104         /* I/OAT v3.3 platforms */
 105         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD0) },
 106         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD1) },
 107         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD2) },
 108         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BWD3) },
 109
 110         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE0) },
 111         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE1) },
 112         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE2) },
 113         { PCI_VDEVICE(INTEL, PCI_DEVICE_ID_INTEL_IOAT_BDXDE3) },
 114
 115         { 0, }
 116 };
 117 MODULE_DEVICE_TABLE(pci, ioat_pci_tbl);
 118
 119 static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id);
 120 static void ioat_remove(struct pci_dev *pdev);
 121
 122 static int ioat_dca_enabled = 1;
 123 module_param(ioat_dca_enabled, int, 0644);
 124 MODULE_PARM_DESC(ioat_dca_enabled, "control support of dca service (default: 1)");
 125
 126 struct kmem_cache *ioat2_cache;
 127 struct kmem_cache *ioat3_sed_cache;
 128
 129 #define DRV_NAME "ioatdma"
 130
 131 static struct pci_driver ioat_pci_driver = {
 132         .name           = DRV_NAME,
 133         .id_table       = ioat_pci_tbl,
 134         .probe          = ioat_pci_probe,
 135         .remove         = ioat_remove,
 136 };
 137
 138 static struct ioatdma_device *
 139 alloc_ioatdma(struct pci_dev *pdev, void __iomem *iobase)
 140 {
 141         struct device *dev = &pdev->dev;
 142         struct ioatdma_device *d = devm_kzalloc(dev, sizeof(*d), GFP_KERNEL);
 143
 144         if (!d)
 145                 return NULL;
 146         d->pdev = pdev;
 147         d->reg_base = iobase;
 148         return d;
 149 }
 150
 151 static int ioat_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
 152 {
 153         void __iomem * const *iomap;
 154         struct device *dev = &pdev->dev;
 155         struct ioatdma_device *device;
 156         int err;
 157
 158         err = pcim_enable_device(pdev);
 159         if (err)
 160                 return err;
 161
 162         err = pcim_iomap_regions(pdev, 1 << IOAT_MMIO_BAR, DRV_NAME);
 163         if (err)
 164                 return err;
 165         iomap = pcim_iomap_table(pdev);
 166         if (!iomap)
 167                 return -ENOMEM;
 168
 169         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
 170         if (err)
 171                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 172         if (err)
 173                 return err;
 174
 175         err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
 176         if (err)
 177                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 178         if (err)
 179                 return err;
 180
 181         device = alloc_ioatdma(pdev, iomap[IOAT_MMIO_BAR]);
 182         if (!device)
 183                 return -ENOMEM;
 184         pci_set_master(pdev);
 185         pci_set_drvdata(pdev, device);
 186
 187         device->version = readb(device->reg_base + IOAT_VER_OFFSET);
 188         if (device->version == IOAT_VER_1_2)
 189                 err = ioat1_dma_probe(device, ioat_dca_enabled);
 190         else if (device->version == IOAT_VER_2_0)
 191                 err = ioat2_dma_probe(device, ioat_dca_enabled);
 192         else if (device->version >= IOAT_VER_3_0)
 193                 err = ioat3_dma_probe(device, ioat_dca_enabled);
 194         else
 195                 return -ENODEV;
 196
 197         if (err) {
 198                 dev_err(dev, "Intel(R) I/OAT DMA Engine init failed\n");
 199                 return -ENODEV;
 200         }
 201
 202         return 0;
 203 }
 204
 205 static void ioat_remove(struct pci_dev *pdev)
 206 {
 207         struct ioatdma_device *device = pci_get_drvdata(pdev);
 208
 209         if (!device)
 210                 return;
 211
 212         dev_err(&pdev->dev, "Removing dma and dca services\n");
 213         if (device->dca) {
 214                 unregister_dca_provider(device->dca, &pdev->dev);
 215                 free_dca_provider(device->dca);
 216                 device->dca = NULL;
 217         }
 218         ioat_dma_remove(device);
 219 }
 220
 221 static int __init ioat_init_module(void)
 222 {
 223         int err = -ENOMEM;
 224
 225         pr_info("%s: Intel(R) QuickData Technology Driver %s\n",
 226                 DRV_NAME, IOAT_DMA_VERSION);
 227
 228         ioat2_cache = kmem_cache_create("ioat2", sizeof(struct ioat_ring_ent),
 229                                         0, SLAB_HWCACHE_ALIGN, NULL);
 230         if (!ioat2_cache)
 231                 return -ENOMEM;
 232
 233         ioat3_sed_cache = KMEM_CACHE(ioat_sed_ent, 0);
 234         if (!ioat3_sed_cache)
 235                 goto err_ioat2_cache;
 236
 237         err = pci_register_driver(&ioat_pci_driver);
 238         if (err)
 239                 goto err_ioat3_cache;
 240
 241         return 0;
 242
 243  err_ioat3_cache:
 244         kmem_cache_destroy(ioat3_sed_cache);
 245
 246  err_ioat2_cache:
 247         kmem_cache_destroy(ioat2_cache);
 248
 249         return err;
 250 }
 251 module_init(ioat_init_module);
 252
 253 static void __exit ioat_exit_module(void)
 254 {
 255         pci_unregister_driver(&ioat_pci_driver);
 256         kmem_cache_destroy(ioat2_cache);
 257 }
 258 module_exit(ioat_exit_module);