150 lines
4.4 KiB
C
150 lines
4.4 KiB
C
/*
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* Intel MIC Platform Software Stack (MPSS)
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*
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* Copyright(c) 2013 Intel Corporation.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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* Disclaimer: The codes contained in these modules may be specific to
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* the Intel Software Development Platform codenamed: Knights Ferry, and
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* the Intel product codenamed: Knights Corner, and are not backward
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* compatible with other Intel products. Additionally, Intel will NOT
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* support the codes or instruction set in future products.
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*
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* Intel MIC Card driver.
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*
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*/
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#ifndef _MIC_CARD_DEVICE_H_
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#define _MIC_CARD_DEVICE_H_
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#include <linux/workqueue.h>
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#include <linux/io.h>
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#include <linux/interrupt.h>
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#include <linux/mic_bus.h>
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#include "../bus/scif_bus.h"
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#include "../bus/vop_bus.h"
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/**
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* struct mic_intr_info - Contains h/w specific interrupt sources info
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*
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* @num_intr: The number of irqs available
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*/
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struct mic_intr_info {
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u32 num_intr;
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};
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/**
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* struct mic_irq_info - OS specific irq information
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*
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* @irq_usage_count: usage count array tracking the number of sources
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* assigned for each irq.
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*/
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struct mic_irq_info {
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int *irq_usage_count;
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};
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/**
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* struct mic_device - MIC device information.
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*
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* @mmio: MMIO bar information.
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*/
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struct mic_device {
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struct mic_mw mmio;
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};
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/**
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* struct mic_driver - MIC card driver information.
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*
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* @name: Name for MIC driver.
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* @dbg_dir: debugfs directory of this MIC device.
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* @dev: The device backing this MIC.
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* @dp: The pointer to the virtio device page.
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* @mdev: MIC device information for the host.
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* @hotplug_work: Hot plug work for adding/removing virtio devices.
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* @irq_info: The OS specific irq information
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* @intr_info: H/W specific interrupt information.
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* @dma_mbdev: dma device on the MIC virtual bus.
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* @dma_ch - Array of DMA channels
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* @num_dma_ch - Number of DMA channels available
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* @scdev: SCIF device on the SCIF virtual bus.
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* @vpdev: Virtio over PCIe device on the VOP virtual bus.
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*/
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struct mic_driver {
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char name[20];
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struct dentry *dbg_dir;
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struct device *dev;
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void __iomem *dp;
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struct mic_device mdev;
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struct work_struct hotplug_work;
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struct mic_irq_info irq_info;
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struct mic_intr_info intr_info;
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struct mbus_device *dma_mbdev;
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struct dma_chan *dma_ch[MIC_MAX_DMA_CHAN];
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int num_dma_ch;
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struct scif_hw_dev *scdev;
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struct vop_device *vpdev;
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};
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/**
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* struct mic_irq - opaque pointer used as cookie
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*/
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struct mic_irq;
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/**
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* mic_mmio_read - read from an MMIO register.
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* @mw: MMIO register base virtual address.
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* @offset: register offset.
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*
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* RETURNS: register value.
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*/
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static inline u32 mic_mmio_read(struct mic_mw *mw, u32 offset)
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{
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return ioread32(mw->va + offset);
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}
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/**
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* mic_mmio_write - write to an MMIO register.
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* @mw: MMIO register base virtual address.
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* @val: the data value to put into the register
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* @offset: register offset.
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*
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* RETURNS: none.
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*/
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static inline void
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mic_mmio_write(struct mic_mw *mw, u32 val, u32 offset)
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{
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iowrite32(val, mw->va + offset);
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}
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int mic_driver_init(struct mic_driver *mdrv);
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void mic_driver_uninit(struct mic_driver *mdrv);
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int mic_next_card_db(void);
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struct mic_irq *
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mic_request_card_irq(irq_handler_t handler, irq_handler_t thread_fn,
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const char *name, void *data, int db);
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void mic_free_card_irq(struct mic_irq *cookie, void *data);
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u32 mic_read_spad(struct mic_device *mdev, unsigned int idx);
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void mic_send_intr(struct mic_device *mdev, int doorbell);
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void mic_send_p2p_intr(int doorbell, struct mic_mw *mw);
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int mic_db_to_irq(struct mic_driver *mdrv, int db);
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u32 mic_ack_interrupt(struct mic_device *mdev);
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void mic_hw_intr_init(struct mic_driver *mdrv);
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void __iomem *
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mic_card_map(struct mic_device *mdev, dma_addr_t addr, size_t size);
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void mic_card_unmap(struct mic_device *mdev, void __iomem *addr);
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void __init mic_create_card_debug_dir(struct mic_driver *mdrv);
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void mic_delete_card_debug_dir(struct mic_driver *mdrv);
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void __init mic_init_card_debugfs(void);
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void mic_exit_card_debugfs(void);
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#endif
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