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 #include <linux/irqreturn.h>
  28 #include <linux/dmaengine.h>
  29 #include <linux/miscdevice.h>
  30 #include <linux/mic_bus.h>
  31 #include "../bus/scif_bus.h"
  32 #include "../bus/vop_bus.h"
  33 #include "../bus/cosm_bus.h"
  34 #include "mic_intr.h"
  35
  36 /**
  37  * enum mic_stepping - MIC stepping ids.
  38  */
  39 enum mic_stepping {
  40         MIC_A0_STEP = 0x0,
  41         MIC_B0_STEP = 0x10,
  42         MIC_B1_STEP = 0x11,
  43         MIC_C0_STEP = 0x20,
  44 };
  45
  46 extern struct cosm_hw_ops cosm_hw_ops;
  47
  48 /**
  49  * struct mic_device -  MIC device information for each card.
  50  *
  51  * @mmio: MMIO bar information.
  52  * @aper: Aperture bar information.
  53  * @family: The MIC family to which this device belongs.
  54  * @ops: MIC HW specific operations.
  55  * @id: The unique device id for this MIC device.
  56  * @stepping: Stepping ID.
  57  * @pdev: Underlying PCI device.
  58  * @mic_mutex: Mutex for synchronizing access to mic_device.
  59  * @intr_ops: HW specific interrupt operations.
  60  * @smpt_ops: Hardware specific SMPT operations.
  61  * @smpt: MIC SMPT information.
  62  * @intr_info: H/W specific interrupt information.
  63  * @irq_info: The OS specific irq information
  64  * @dbg_dir: debugfs directory of this MIC device.
  65  * @bootaddr: MIC boot address.
  66  * @dp: virtio device page
  67  * @dp_dma_addr: virtio device page DMA address.
  68  * @dma_mbdev: MIC BUS DMA device.
  69  * @dma_ch - Array of DMA channels
  70  * @num_dma_ch - Number of DMA channels available
  71  * @scdev: SCIF device on the SCIF virtual bus.
  72  * @vpdev: Virtio over PCIe device on the VOP virtual bus.
  73  * @cosm_dev: COSM device
  74  */
  75 struct mic_device {
  76         struct mic_mw mmio;
  77         struct mic_mw aper;
  78         enum mic_hw_family family;
  79         struct mic_hw_ops *ops;
  80         int id;
  81         enum mic_stepping stepping;
  82         struct pci_dev *pdev;
  83         struct mutex mic_mutex;
  84         struct mic_hw_intr_ops *intr_ops;
  85         struct mic_smpt_ops *smpt_ops;
  86         struct mic_smpt_info *smpt;
  87         struct mic_intr_info *intr_info;
  88         struct mic_irq_info irq_info;
  89         struct dentry *dbg_dir;
  90         u32 bootaddr;
  91         void *dp;
  92         dma_addr_t dp_dma_addr;
  93         struct mbus_device *dma_mbdev;
  94         struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
  95         int num_dma_ch;
  96         struct scif_hw_dev *scdev;
  97         struct vop_device *vpdev;
  98         struct cosm_device *cosm_dev;
  99 };
 100
 101 /**
 102  * struct mic_hw_ops - MIC HW specific operations.
 103  * @aper_bar: Aperture bar resource number.
 104  * @mmio_bar: MMIO bar resource number.
 105  * @read_spad: Read from scratch pad register.
 106  * @write_spad: Write to scratch pad register.
 107  * @send_intr: Send an interrupt for a particular doorbell on the card.
 108  * @ack_interrupt: Hardware specific operations to ack the h/w on
 109  * receipt of an interrupt.
 110  * @intr_workarounds: Hardware specific workarounds needed after
 111  * handling an interrupt.
 112  * @reset: Reset the remote processor.
 113  * @reset_fw_ready: Reset firmware ready field.
 114  * @is_fw_ready: Check if firmware is ready for OS download.
 115  * @send_firmware_intr: Send an interrupt to the card firmware.
 116  * @load_mic_fw: Load firmware segments required to boot the card
 117  * into card memory. This includes the kernel, command line, ramdisk etc.
 118  * @get_postcode: Get post code status from firmware.
 119  * @dma_filter: DMA filter function to be used.
 120  */
 121 struct mic_hw_ops {
 122         u8 aper_bar;
 123         u8 mmio_bar;
 124         u32 (*read_spad)(struct mic_device *mdev, unsigned int idx);
 125         void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
 126         void (*send_intr)(struct mic_device *mdev, int doorbell);
 127         u32 (*ack_interrupt)(struct mic_device *mdev);
 128         void (*intr_workarounds)(struct mic_device *mdev);
 129         void (*reset)(struct mic_device *mdev);
 130         void (*reset_fw_ready)(struct mic_device *mdev);
 131         bool (*is_fw_ready)(struct mic_device *mdev);
 132         void (*send_firmware_intr)(struct mic_device *mdev);
 133         int (*load_mic_fw)(struct mic_device *mdev, const char *buf);
 134         u32 (*get_postcode)(struct mic_device *mdev);
 135         bool (*dma_filter)(struct dma_chan *chan, void *param);
 136 };
 137
 138 /**
 139  * mic_mmio_read - read from an MMIO register.
 140  * @mw: MMIO register base virtual address.
 141  * @offset: register offset.
 142  *
 143  * RETURNS: register value.
 144  */
 145 static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
 146 {
 147         return ioread32(mw->va + offset);
 148 }
 149
 150 /**
 151  * mic_mmio_write - write to an MMIO register.
 152  * @mw: MMIO register base virtual address.
 153  * @val: the data value to put into the register
 154  * @offset: register offset.
 155  *
 156  * RETURNS: none.
 157  */
 158 static inline void
 159 mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
 160 {
 161         iowrite32(val, mw->va + offset);
 162 }
 163
 164 void mic_bootparam_init(struct mic_device *mdev);
 165 void mic_create_debug_dir(struct mic_device *dev);
 166 void mic_delete_debug_dir(struct mic_device *dev);
 167 void __init mic_init_debugfs(void);
 168 void mic_exit_debugfs(void);
 169 #endif