drivers/misc/mic/host/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  * Intel MIC Host driver.
  19  *
  20  */
  21 #ifndef _MIC_DEVICE_H_
  22 #define _MIC_DEVICE_H_
  23
  24 #include <linux/cdev.h>
  25 #include <linux/idr.h>
  26 #include <linux/notifier.h>
  27
  28 #include "mic_intr.h"
  29
  30 /* The maximum number of MIC devices supported in a single host system. */
  31 #define MIC_MAX_NUM_DEVS 256
  32
  33 /**
  34  * enum mic_hw_family - The hardware family to which a device belongs.
  35  */
  36 enum mic_hw_family {
  37         MIC_FAMILY_X100 = 0,
  38         MIC_FAMILY_UNKNOWN
  39 };
  40
  41 /**
  42  * enum mic_stepping - MIC stepping ids.
  43  */
  44 enum mic_stepping {
  45         MIC_A0_STEP = 0x0,
  46         MIC_B0_STEP = 0x10,
  47         MIC_B1_STEP = 0x11,
  48         MIC_C0_STEP = 0x20,
  49 };
  50
  51 /**
  52  * struct mic_device -  MIC device information for each card.
  53  *
  54  * @mmio: MMIO bar information.
  55  * @aper: Aperture bar information.
  56  * @family: The MIC family to which this device belongs.
  57  * @ops: MIC HW specific operations.
  58  * @id: The unique device id for this MIC device.
  59  * @stepping: Stepping ID.
  60  * @attr_group: Pointer to list of sysfs attribute groups.
  61  * @sdev: Device for sysfs entries.
  62  * @mic_mutex: Mutex for synchronizing access to mic_device.
  63  * @intr_ops: HW specific interrupt operations.
  64  * @smpt_ops: Hardware specific SMPT operations.
  65  * @smpt: MIC SMPT information.
  66  * @intr_info: H/W specific interrupt information.
  67  * @irq_info: The OS specific irq information
  68  * @dbg_dir: debugfs directory of this MIC device.
  69  * @cmdline: Kernel command line.
  70  * @firmware: Firmware file name.
  71  * @ramdisk: Ramdisk file name.
  72  * @bootmode: Boot mode i.e. "linux" or "elf" for flash updates.
  73  * @bootaddr: MIC boot address.
  74  * @reset_trigger_work: Work for triggering reset requests.
  75  * @shutdown_work: Work for handling shutdown interrupts.
  76  * @state: MIC state.
  77  * @shutdown_status: MIC status reported by card for shutdown/crashes.
  78  * @state_sysfs: Sysfs dirent for notifying ring 3 about MIC state changes.
  79  * @reset_wait: Waitqueue for sleeping while reset completes.
  80  * @log_buf_addr: Log buffer address for MIC.
  81  * @log_buf_len: Log buffer length address for MIC.
  82  * @dp: virtio device page
  83  * @dp_dma_addr: virtio device page DMA address.
  84  * @shutdown_db: shutdown doorbell.
  85  * @shutdown_cookie: shutdown cookie.
  86  * @cdev: Character device for MIC.
  87  * @vdev_list: list of virtio devices.
  88  * @pm_notifier: Handles PM notifications from the OS.
  89  */
  90 struct mic_device {
  91         struct mic_mw mmio;
  92         struct mic_mw aper;
  93         enum mic_hw_family family;
  94         struct mic_hw_ops *ops;
  95         int id;
  96         enum mic_stepping stepping;
  97         const struct attribute_group **attr_group;
  98         struct device *sdev;
  99         struct mutex mic_mutex;
 100         struct mic_hw_intr_ops *intr_ops;
 101         struct mic_smpt_ops *smpt_ops;
 102         struct mic_smpt_info *smpt;
 103         struct mic_intr_info *intr_info;
 104         struct mic_irq_info irq_info;
 105         struct dentry *dbg_dir;
 106         char *cmdline;
 107         char *firmware;
 108         char *ramdisk;
 109         char *bootmode;
 110         u32 bootaddr;
 111         struct work_struct reset_trigger_work;
 112         struct work_struct shutdown_work;
 113         u8 state;
 114         u8 shutdown_status;
 115         struct kernfs_node *state_sysfs;
 116         struct completion reset_wait;
 117         void *log_buf_addr;
 118         int *log_buf_len;
 119         void *dp;
 120         dma_addr_t dp_dma_addr;
 121         int shutdown_db;
 122         struct mic_irq *shutdown_cookie;
 123         struct cdev cdev;
 124         struct list_head vdev_list;
 125         struct notifier_block pm_notifier;
 126 };
 127
 128 /**
 129  * struct mic_hw_ops - MIC HW specific operations.
 130  * @aper_bar: Aperture bar resource number.
 131  * @mmio_bar: MMIO bar resource number.
 132  * @read_spad: Read from scratch pad register.
 133  * @write_spad: Write to scratch pad register.
 134  * @send_intr: Send an interrupt for a particular doorbell on the card.
 135  * @ack_interrupt: Hardware specific operations to ack the h/w on
 136  * receipt of an interrupt.
 137  * @intr_workarounds: Hardware specific workarounds needed after
 138  * handling an interrupt.
 139  * @reset: Reset the remote processor.
 140  * @reset_fw_ready: Reset firmware ready field.
 141  * @is_fw_ready: Check if firmware is ready for OS download.
 142  * @send_firmware_intr: Send an interrupt to the card firmware.
 143  * @load_mic_fw: Load firmware segments required to boot the card
 144  * into card memory. This includes the kernel, command line, ramdisk etc.
 145  * @get_postcode: Get post code status from firmware.
 146  */
 147 struct mic_hw_ops {
 148         u8 aper_bar;
 149         u8 mmio_bar;
 150         u32 (*read_spad)(struct mic_device *mdev, unsigned int idx);
 151         void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
 152         void (*send_intr)(struct mic_device *mdev, int doorbell);
 153         u32 (*ack_interrupt)(struct mic_device *mdev);
 154         void (*intr_workarounds)(struct mic_device *mdev);
 155         void (*reset)(struct mic_device *mdev);
 156         void (*reset_fw_ready)(struct mic_device *mdev);
 157         bool (*is_fw_ready)(struct mic_device *mdev);
 158         void (*send_firmware_intr)(struct mic_device *mdev);
 159         int (*load_mic_fw)(struct mic_device *mdev, const char *buf);
 160         u32 (*get_postcode)(struct mic_device *mdev);
 161 };
 162
 163 /**
 164  * mic_mmio_read - read from an MMIO register.
 165  * @mw: MMIO register base virtual address.
 166  * @offset: register offset.
 167  *
 168  * RETURNS: register value.
 169  */
 170 static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
 171 {
 172         return ioread32(mw->va + offset);
 173 }
 174
 175 /**
 176  * mic_mmio_write - write to an MMIO register.
 177  * @mw: MMIO register base virtual address.
 178  * @val: the data value to put into the register
 179  * @offset: register offset.
 180  *
 181  * RETURNS: none.
 182  */
 183 static inline void
 184 mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
 185 {
 186         iowrite32(val, mw->va + offset);
 187 }
 188
 189 void mic_sysfs_init(struct mic_device *mdev);
 190 int mic_start(struct mic_device *mdev, const char *buf);
 191 void mic_stop(struct mic_device *mdev, bool force);
 192 void mic_shutdown(struct mic_device *mdev);
 193 void mic_reset_delayed_work(struct work_struct *work);
 194 void mic_reset_trigger_work(struct work_struct *work);
 195 void mic_shutdown_work(struct work_struct *work);
 196 void mic_bootparam_init(struct mic_device *mdev);
 197 void mic_set_state(struct mic_device *mdev, u8 state);
 198 void mic_set_shutdown_status(struct mic_device *mdev, u8 status);
 199 void mic_create_debug_dir(struct mic_device *dev);
 200 void mic_delete_debug_dir(struct mic_device *dev);
 201 void __init mic_init_debugfs(void);
 202 void mic_exit_debugfs(void);
 203 void mic_prepare_suspend(struct mic_device *mdev);
 204 void mic_complete_resume(struct mic_device *mdev);
 205 void mic_suspend(struct mic_device *mdev);
 206 #endif