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Diffstat (limited to 'drivers/ntb/ntb_hw.h')
-rw-r--r--drivers/ntb/ntb_hw.h256
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diff --git a/drivers/ntb/ntb_hw.h b/drivers/ntb/ntb_hw.h
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--- a/drivers/ntb/ntb_hw.h
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-/*
- * This file is provided under a dual BSD/GPLv2 license. When using or
- * redistributing this file, you may do so under either license.
- *
- * GPL LICENSE SUMMARY
- *
- * Copyright(c) 2012 Intel Corporation. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of version 2 of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * BSD LICENSE
- *
- * Copyright(c) 2012 Intel Corporation. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copy
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- *
- * Intel PCIe NTB Linux driver
- *
- * Contact Information:
- * Jon Mason <jon.mason@intel.com>
- */
-#include <linux/ntb.h>
-
-#define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725
-#define PCI_DEVICE_ID_INTEL_NTB_PS_JSF 0x3726
-#define PCI_DEVICE_ID_INTEL_NTB_SS_JSF 0x3727
-#define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB 0x3C0D
-#define PCI_DEVICE_ID_INTEL_NTB_PS_SNB 0x3C0E
-#define PCI_DEVICE_ID_INTEL_NTB_SS_SNB 0x3C0F
-#define PCI_DEVICE_ID_INTEL_NTB_B2B_IVT 0x0E0D
-#define PCI_DEVICE_ID_INTEL_NTB_PS_IVT 0x0E0E
-#define PCI_DEVICE_ID_INTEL_NTB_SS_IVT 0x0E0F
-#define PCI_DEVICE_ID_INTEL_NTB_B2B_HSX 0x2F0D
-#define PCI_DEVICE_ID_INTEL_NTB_PS_HSX 0x2F0E
-#define PCI_DEVICE_ID_INTEL_NTB_SS_HSX 0x2F0F
-#define PCI_DEVICE_ID_INTEL_NTB_B2B_BWD 0x0C4E
-
-#ifndef readq
-static inline u64 readq(void __iomem *addr)
-{
- return readl(addr) | (((u64) readl(addr + 4)) << 32LL);
-}
-#endif
-
-#ifndef writeq
-static inline void writeq(u64 val, void __iomem *addr)
-{
- writel(val & 0xffffffff, addr);
- writel(val >> 32, addr + 4);
-}
-#endif
-
-#define NTB_BAR_MMIO 0
-#define NTB_BAR_23 2
-#define NTB_BAR_4 4
-#define NTB_BAR_5 5
-
-#define NTB_BAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\
- (1 << NTB_BAR_4))
-#define NTB_SPLITBAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\
- (1 << NTB_BAR_4) | (1 << NTB_BAR_5))
-
-#define NTB_HB_TIMEOUT msecs_to_jiffies(1000)
-
-enum ntb_hw_event {
- NTB_EVENT_SW_EVENT0 = 0,
- NTB_EVENT_SW_EVENT1,
- NTB_EVENT_SW_EVENT2,
- NTB_EVENT_HW_ERROR,
- NTB_EVENT_HW_LINK_UP,
- NTB_EVENT_HW_LINK_DOWN,
-};
-
-struct ntb_mw {
- dma_addr_t phys_addr;
- void __iomem *vbase;
- resource_size_t bar_sz;
-};
-
-struct ntb_db_cb {
- int (*callback)(void *data, int db_num);
- unsigned int db_num;
- void *data;
- struct ntb_device *ndev;
- struct tasklet_struct irq_work;
-};
-
-#define WA_SNB_ERR 0x00000001
-
-struct ntb_device {
- struct pci_dev *pdev;
- struct msix_entry *msix_entries;
- void __iomem *reg_base;
- struct ntb_mw *mw;
- struct {
- unsigned char max_mw;
- unsigned char max_spads;
- unsigned char max_db_bits;
- unsigned char msix_cnt;
- } limits;
- struct {
- void __iomem *ldb;
- void __iomem *ldb_mask;
- void __iomem *rdb;
- void __iomem *bar2_xlat;
- void __iomem *bar4_xlat;
- void __iomem *bar5_xlat;
- void __iomem *spad_write;
- void __iomem *spad_read;
- void __iomem *lnk_cntl;
- void __iomem *lnk_stat;
- void __iomem *spci_cmd;
- } reg_ofs;
- struct ntb_transport *ntb_transport;
- void (*event_cb)(void *handle, enum ntb_hw_event event);
-
- struct ntb_db_cb *db_cb;
- unsigned char hw_type;
- unsigned char conn_type;
- unsigned char dev_type;
- unsigned char num_msix;
- unsigned char bits_per_vector;
- unsigned char max_cbs;
- unsigned char link_width;
- unsigned char link_speed;
- unsigned char link_status;
- unsigned char split_bar;
-
- struct delayed_work hb_timer;
- unsigned long last_ts;
-
- struct delayed_work lr_timer;
-
- struct dentry *debugfs_dir;
- struct dentry *debugfs_info;
-
- unsigned int wa_flags;
-};
-
-/**
- * ntb_max_cbs() - return the max callbacks
- * @ndev: pointer to ntb_device instance
- *
- * Given the ntb pointer, return the maximum number of callbacks
- *
- * RETURNS: the maximum number of callbacks
- */
-static inline unsigned char ntb_max_cbs(struct ntb_device *ndev)
-{
- return ndev->max_cbs;
-}
-
-/**
- * ntb_max_mw() - return the max number of memory windows
- * @ndev: pointer to ntb_device instance
- *
- * Given the ntb pointer, return the maximum number of memory windows
- *
- * RETURNS: the maximum number of memory windows
- */
-static inline unsigned char ntb_max_mw(struct ntb_device *ndev)
-{
- return ndev->limits.max_mw;
-}
-
-/**
- * ntb_hw_link_status() - return the hardware link status
- * @ndev: pointer to ntb_device instance
- *
- * Returns true if the hardware is connected to the remote system
- *
- * RETURNS: true or false based on the hardware link state
- */
-static inline bool ntb_hw_link_status(struct ntb_device *ndev)
-{
- return ndev->link_status == NTB_LINK_UP;
-}
-
-/**
- * ntb_query_pdev() - return the pci_dev pointer
- * @ndev: pointer to ntb_device instance
- *
- * Given the ntb pointer, return the pci_dev pointer for the NTB hardware device
- *
- * RETURNS: a pointer to the ntb pci_dev
- */
-static inline struct pci_dev *ntb_query_pdev(struct ntb_device *ndev)
-{
- return ndev->pdev;
-}
-
-/**
- * ntb_query_debugfs() - return the debugfs pointer
- * @ndev: pointer to ntb_device instance
- *
- * Given the ntb pointer, return the debugfs directory pointer for the NTB
- * hardware device
- *
- * RETURNS: a pointer to the debugfs directory
- */
-static inline struct dentry *ntb_query_debugfs(struct ntb_device *ndev)
-{
- return ndev->debugfs_dir;
-}
-
-struct ntb_device *ntb_register_transport(struct pci_dev *pdev,
- void *transport);
-void ntb_unregister_transport(struct ntb_device *ndev);
-void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr);
-int ntb_register_db_callback(struct ntb_device *ndev, unsigned int idx,
- void *data, int (*db_cb_func)(void *data,
- int db_num));
-void ntb_unregister_db_callback(struct ntb_device *ndev, unsigned int idx);
-int ntb_register_event_callback(struct ntb_device *ndev,
- void (*event_cb_func)(void *handle,
- enum ntb_hw_event event));
-void ntb_unregister_event_callback(struct ntb_device *ndev);
-int ntb_get_max_spads(struct ntb_device *ndev);
-int ntb_write_local_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
-int ntb_read_local_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
-int ntb_write_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
-int ntb_read_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
-resource_size_t ntb_get_mw_base(struct ntb_device *ndev, unsigned int mw);
-void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw);
-u64 ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw);
-void ntb_ring_doorbell(struct ntb_device *ndev, unsigned int idx);
-void *ntb_find_transport(struct pci_dev *pdev);
-
-int ntb_transport_init(struct pci_dev *pdev);
-void ntb_transport_free(void *transport);