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* Intel MIC Platform Software Stack (MPSS)
* Copyright(c) 2013 Intel Corporation.
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* General Public License for more details.
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
* Intel MIC Host driver.
#ifndef _MIC_DEVICE_H_
#define _MIC_DEVICE_H_
#include <linux/cdev.h>
#include <linux/idr.h>
#include <linux/notifier.h>
#include <linux/irqreturn.h>
#include <linux/dmaengine.h>
#include <linux/miscdevice.h>
#include <linux/mic_bus.h>
#include "../bus/scif_bus.h"
#include "../bus/vop_bus.h"
#include "../bus/cosm_bus.h"
#include "mic_intr.h"
* enum mic_stepping - MIC stepping ids.
enum mic_stepping {
MIC_A0_STEP = 0x0,
MIC_B0_STEP = 0x10,
MIC_B1_STEP = 0x11,
MIC_C0_STEP = 0x20,
extern struct cosm_hw_ops cosm_hw_ops;
* struct mic_device - MIC device information for each card.
* @mmio: MMIO bar information.
* @aper: Aperture bar information.
* @family: The MIC family to which this device belongs.
* @ops: MIC HW specific operations.
* @id: The unique device id for this MIC device.
* @stepping: Stepping ID.
* @pdev: Underlying PCI device.
* @mic_mutex: Mutex for synchronizing access to mic_device.
* @intr_ops: HW specific interrupt operations.
* @smpt_ops: Hardware specific SMPT operations.
* @smpt: MIC SMPT information.
* @intr_info: H/W specific interrupt information.
* @irq_info: The OS specific irq information
* @dbg_dir: debugfs directory of this MIC device.
* @bootaddr: MIC boot address.
* @dp: virtio device page
* @dp_dma_addr: virtio device page DMA address.
* @dma_mbdev: MIC BUS DMA device.
* @dma_ch - Array of DMA channels
* @num_dma_ch - Number of DMA channels available
* @scdev: SCIF device on the SCIF virtual bus.
* @vpdev: Virtio over PCIe device on the VOP virtual bus.
* @cosm_dev: COSM device
struct mic_device {
struct mic_mw mmio;
struct mic_mw aper;
enum mic_hw_family family;
struct mic_hw_ops *ops;
int id;
enum mic_stepping stepping;
struct pci_dev *pdev;
struct mutex mic_mutex;
struct mic_hw_intr_ops *intr_ops;
struct mic_smpt_ops *smpt_ops;
struct mic_smpt_info *smpt;
struct mic_intr_info *intr_info;
struct mic_irq_info irq_info;
struct dentry *dbg_dir;
u32 bootaddr;
void *dp;
dma_addr_t dp_dma_addr;
struct mbus_device *dma_mbdev;
struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
int num_dma_ch;
struct scif_hw_dev *scdev;
struct vop_device *vpdev;
struct cosm_device *cosm_dev;
* struct mic_hw_ops - MIC HW specific operations.
* @aper_bar: Aperture bar resource number.
* @mmio_bar: MMIO bar resource number.
* @read_spad: Read from scratch pad register.
* @write_spad: Write to scratch pad register.
* @send_intr: Send an interrupt for a particular doorbell on the card.
* @ack_interrupt: Hardware specific operations to ack the h/w on
* receipt of an interrupt.
* @intr_workarounds: Hardware specific workarounds needed after
* handling an interrupt.
* @reset: Reset the remote processor.
* @reset_fw_ready: Reset firmware ready field.
* @is_fw_ready: Check if firmware is ready for OS download.
* @send_firmware_intr: Send an interrupt to the card firmware.
* @load_mic_fw: Load firmware segments required to boot the card
* into card memory. This includes the kernel, command line, ramdisk etc.
* @get_postcode: Get post code status from firmware.
* @dma_filter: DMA filter function to be used.
struct mic_hw_ops {
u8 aper_bar;
u8 mmio_bar;
u32 (*read_spad)(struct mic_device *mdev, unsigned int idx);
void (*write_spad)(struct mic_device *mdev, unsigned int idx, u32 val);
void (*send_intr)(struct mic_device *mdev, int doorbell);
u32 (*ack_interrupt)(struct mic_device *mdev);
void (*intr_workarounds)(struct mic_device *mdev);
void (*reset)(struct mic_device *mdev);
void (*reset_fw_ready)(struct mic_device *mdev);
bool (*is_fw_ready)(struct mic_device *mdev);
void (*send_firmware_intr)(struct mic_device *mdev);
int (*load_mic_fw)(struct mic_device *mdev, const char *buf);
u32 (*get_postcode)(struct mic_device *mdev);
bool (*dma_filter)(struct dma_chan *chan, void *param);
* mic_mmio_read - read from an MMIO register.
* @mw: MMIO register base virtual address.
* @offset: register offset.
* RETURNS: register value.
static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
return ioread32(mw->va + offset);
* mic_mmio_write - write to an MMIO register.
* @mw: MMIO register base virtual address.
* @val: the data value to put into the register
* @offset: register offset.
* RETURNS: none.
static inline void
mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
iowrite32(val, mw->va + offset);
void mic_bootparam_init(struct mic_device *mdev);
void mic_create_debug_dir(struct mic_device *dev);
void mic_delete_debug_dir(struct mic_device *dev);
void __init mic_init_debugfs(void);
void mic_exit_debugfs(void);