drivers/hwtracing/intel_th/pci.c

   1 /*
   2  * Intel(R) Trace Hub pci driver
   3  *
   4  * Copyright (C) 2014-2015 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  */
  15
  16 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
  17
  18 #include <linux/types.h>
  19 #include <linux/module.h>
  20 #include <linux/device.h>
  21 #include <linux/sysfs.h>
  22 #include <linux/pci.h>
  23
  24 #include "intel_th.h"
  25
  26 #define DRIVER_NAME "intel_th_pci"
  27
  28 #define BAR_MASK (BIT(TH_MMIO_CONFIG) | BIT(TH_MMIO_SW))
  29
  30 static int intel_th_pci_probe(struct pci_dev *pdev,
  31                               const struct pci_device_id *id)
  32 {
  33         struct intel_th *th;
  34         int err;
  35
  36         err = pcim_enable_device(pdev);
  37         if (err)
  38                 return err;
  39
  40         err = pcim_iomap_regions_request_all(pdev, BAR_MASK, DRIVER_NAME);
  41         if (err)
  42                 return err;
  43
  44         th = intel_th_alloc(&pdev->dev, pdev->resource,
  45                             DEVICE_COUNT_RESOURCE, pdev->irq);
  46         if (IS_ERR(th))
  47                 return PTR_ERR(th);
  48
  49         pci_set_drvdata(pdev, th);
  50
  51         return 0;
  52 }
  53
  54 static void intel_th_pci_remove(struct pci_dev *pdev)
  55 {
  56         struct intel_th *th = pci_get_drvdata(pdev);
  57
  58         intel_th_free(th);
  59 }
  60
  61 static const struct pci_device_id intel_th_pci_id_table[] = {
  62         {
  63                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0x9d26),
  64                 .driver_data = (kernel_ulong_t)0,
  65         },
  66         {
  67                 PCI_DEVICE(PCI_VENDOR_ID_INTEL, 0xa126),
  68                 .driver_data = (kernel_ulong_t)0,
  69         },
  70         { 0 },
  71 };
  72
  73 MODULE_DEVICE_TABLE(pci, intel_th_pci_id_table);
  74
  75 static struct pci_driver intel_th_pci_driver = {
  76         .name           = DRIVER_NAME,
  77         .id_table       = intel_th_pci_id_table,
  78         .probe          = intel_th_pci_probe,
  79         .remove         = intel_th_pci_remove,
  80 };
  81
  82 module_pci_driver(intel_th_pci_driver);
  83
  84 MODULE_LICENSE("GPL v2");
  85 MODULE_DESCRIPTION("Intel(R) Trace Hub PCI controller driver");
  86 MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");