drivers/misc/mic/card/mic_device.h

   1 /*
   2  * Intel MIC Platform Software Stack (MPSS)
   3  *
   4  * Copyright(c) 2013 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License, version 2, as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  13  * General Public License for more details.
  14  *
  15  * The full GNU General Public License is included in this distribution in
  16  * the file called "COPYING".
  17  *
  18  * Disclaimer: The codes contained in these modules may be specific to
  19  * the Intel Software Development Platform codenamed: Knights Ferry, and
  20  * the Intel product codenamed: Knights Corner, and are not backward
  21  * compatible with other Intel products. Additionally, Intel will NOT
  22  * support the codes or instruction set in future products.
  23  *
  24  * Intel MIC Card driver.
  25  *
  26  */
  27 #ifndef _MIC_CARD_DEVICE_H_
  28 #define _MIC_CARD_DEVICE_H_
  29
  30 #include <linux/workqueue.h>
  31 #include <linux/io.h>
  32 #include <linux/interrupt.h>
  33 #include <linux/mic_bus.h>
  34 #include "../bus/scif_bus.h"
  35 #include "../bus/vop_bus.h"
  36
  37 /**
  38  * struct mic_intr_info - Contains h/w specific interrupt sources info
  39  *
  40  * @num_intr: The number of irqs available
  41  */
  42 struct mic_intr_info {
  43         u32 num_intr;
  44 };
  45
  46 /**
  47  * struct mic_irq_info - OS specific irq information
  48  *
  49  * @irq_usage_count: usage count array tracking the number of sources
  50  * assigned for each irq.
  51  */
  52 struct mic_irq_info {
  53         int *irq_usage_count;
  54 };
  55
  56 /**
  57  * struct mic_device -  MIC device information.
  58  *
  59  * @mmio: MMIO bar information.
  60  */
  61 struct mic_device {
  62         struct mic_mw mmio;
  63 };
  64
  65 /**
  66  * struct mic_driver - MIC card driver information.
  67  *
  68  * @name: Name for MIC driver.
  69  * @dbg_dir: debugfs directory of this MIC device.
  70  * @dev: The device backing this MIC.
  71  * @dp: The pointer to the virtio device page.
  72  * @mdev: MIC device information for the host.
  73  * @hotplug_work: Hot plug work for adding/removing virtio devices.
  74  * @irq_info: The OS specific irq information
  75  * @intr_info: H/W specific interrupt information.
  76  * @dma_mbdev: dma device on the MIC virtual bus.
  77  * @dma_ch - Array of DMA channels
  78  * @num_dma_ch - Number of DMA channels available
  79  * @scdev: SCIF device on the SCIF virtual bus.
  80  * @vpdev: Virtio over PCIe device on the VOP virtual bus.
  81  */
  82 struct mic_driver {
  83         char name[20];
  84         struct dentry *dbg_dir;
  85         struct device *dev;
  86         void __iomem *dp;
  87         struct mic_device mdev;
  88         struct work_struct hotplug_work;
  89         struct mic_irq_info irq_info;
  90         struct mic_intr_info intr_info;
  91         struct mbus_device *dma_mbdev;
  92         struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
  93         int num_dma_ch;
  94         struct scif_hw_dev *scdev;
  95         struct vop_device *vpdev;
  96 };
  97
  98 /**
  99  * struct mic_irq - opaque pointer used as cookie
 100  */
 101 struct mic_irq;
 102
 103 /**
 104  * mic_mmio_read - read from an MMIO register.
 105  * @mw: MMIO register base virtual address.
 106  * @offset: register offset.
 107  *
 108  * RETURNS: register value.
 109  */
 110 static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
 111 {
 112         return ioread32(mw->va + offset);
 113 }
 114
 115 /**
 116  * mic_mmio_write - write to an MMIO register.
 117  * @mw: MMIO register base virtual address.
 118  * @val: the data value to put into the register
 119  * @offset: register offset.
 120  *
 121  * RETURNS: none.
 122  */
 123 static inline void
 124 mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
 125 {
 126         iowrite32(val, mw->va + offset);
 127 }
 128
 129 int mic_driver_init(struct mic_driver *mdrv);
 130 void mic_driver_uninit(struct mic_driver *mdrv);
 131 int mic_next_card_db(void);
 132 struct mic_irq *
 133 mic_request_card_irq(irq_handler_t handler, irq_handler_t thread_fn,
 134                      const char *name, void *data, int db);
 135 void mic_free_card_irq(struct mic_irq *cookie, void *data);
 136 u32 mic_read_spad(struct mic_device *mdev, unsigned int idx);
 137 void mic_send_intr(struct mic_device *mdev, int doorbell);
 138 void mic_send_p2p_intr(int doorbell, struct mic_mw *mw);
 139 int mic_db_to_irq(struct mic_driver *mdrv, int db);
 140 u32 mic_ack_interrupt(struct mic_device *mdev);
 141 void mic_hw_intr_init(struct mic_driver *mdrv);
 142 void __iomem *
 143 mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size);
 144 void mic_card_unmap(struct mic_device *mdev, void __iomem *addr);
 145 void __init mic_create_card_debug_dir(struct mic_driver *mdrv);
 146 void mic_delete_card_debug_dir(struct mic_driver *mdrv);
 147 void __init mic_init_card_debugfs(void);
 148 void mic_exit_card_debugfs(void);
 149 #endif