mic_device.h
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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
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* The full GNU General Public License is included in this distribution in
* the file called "COPYING".
*
* Disclaimer: The codes contained in these modules may be specific to
* the Intel Software Development Platform codenamed: Knights Ferry, and
* the Intel product codenamed: Knights Corner, and are not backward
* compatible with other Intel products. Additionally, Intel will NOT
* support the codes or instruction set in future products.
*
* Intel MIC Card driver.
*
*/
#ifndef _MIC_CARD_DEVICE_H_
#define _MIC_CARD_DEVICE_H_
#include <linux/workqueue.h>
#include <linux/io.h>
#include <linux/interrupt.h>
#include <linux/mic_bus.h>
#include "../bus/scif_bus.h"
/**
* struct mic_intr_info - Contains h/w specific interrupt sources info
*
* @num_intr: The number of irqs available
*/
struct mic_intr_info {
u32 num_intr;
};
/**
* struct mic_irq_info - OS specific irq information
*
* @irq_usage_count: usage count array tracking the number of sources
* assigned for each irq.
*/
struct mic_irq_info {
int *irq_usage_count;
};
/**
* struct mic_device - MIC device information.
*
* @mmio: MMIO bar information.
*/
struct mic_device {
struct mic_mw mmio;
};
/**
* struct mic_driver - MIC card driver information.
*
* @name: Name for MIC driver.
* @dbg_dir: debugfs directory of this MIC device.
* @dev: The device backing this MIC.
* @dp: The pointer to the virtio device page.
* @mdev: MIC device information for the host.
* @hotplug_work: Hot plug work for adding/removing virtio devices.
* @irq_info: The OS specific irq information
* @intr_info: H/W specific interrupt information.
* @dma_mbdev: dma device on the MIC virtual bus.
* @dma_ch - Array of DMA channels
* @num_dma_ch - Number of DMA channels available
* @scdev: SCIF device on the SCIF virtual bus.
*/
struct mic_driver {
char name[20];
struct dentry *dbg_dir;
struct device *dev;
void __iomem *dp;
struct mic_device mdev;
struct work_struct hotplug_work;
struct mic_irq_info irq_info;
struct mic_intr_info intr_info;
struct mbus_device *dma_mbdev;
struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
int num_dma_ch;
struct scif_hw_dev *scdev;
};
/**
* struct mic_irq - opaque pointer used as cookie
*/
struct mic_irq;
/**
* 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);
}
int mic_driver_init(struct mic_driver *mdrv);
void mic_driver_uninit(struct mic_driver *mdrv);
int mic_next_card_db(void);
struct mic_irq *
mic_request_card_irq(irq_handler_t handler, irq_handler_t thread_fn,
const char *name, void *data, int db);
void mic_free_card_irq(struct mic_irq *cookie, void *data);
u32 mic_read_spad(struct mic_device *mdev, unsigned int idx);
void mic_send_intr(struct mic_device *mdev, int doorbell);
void mic_send_p2p_intr(int doorbell, struct mic_mw *mw);
int mic_db_to_irq(struct mic_driver *mdrv, int db);
u32 mic_ack_interrupt(struct mic_device *mdev);
void mic_hw_intr_init(struct mic_driver *mdrv);
void __iomem *
mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size);
void mic_card_unmap(struct mic_device *mdev, void __iomem *addr);
void __init mic_create_card_debug_dir(struct mic_driver *mdrv);
void mic_delete_card_debug_dir(struct mic_driver *mdrv);
void __init mic_init_card_debugfs(void);
void mic_exit_card_debugfs(void);
#endif