252 lines
7.8 KiB
C
252 lines
7.8 KiB
C
/*
|
|
* 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>
|
|
*/
|
|
|
|
#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
|
|
|
|
#define msix_table_size(control) ((control & PCI_MSIX_FLAGS_QSIZE)+1)
|
|
|
|
#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_45 4
|
|
#define NTB_BAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\
|
|
(1 << NTB_BAR_45))
|
|
|
|
#define NTB_LINK_DOWN 0
|
|
#define NTB_LINK_UP 1
|
|
|
|
#define NTB_HB_TIMEOUT msecs_to_jiffies(1000)
|
|
|
|
#define NTB_MAX_NUM_MW 2
|
|
|
|
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;
|
|
};
|
|
|
|
struct ntb_device {
|
|
struct pci_dev *pdev;
|
|
struct msix_entry *msix_entries;
|
|
void __iomem *reg_base;
|
|
struct ntb_mw mw[NTB_MAX_NUM_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 *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;
|
|
|
|
struct delayed_work hb_timer;
|
|
unsigned long last_ts;
|
|
|
|
struct delayed_work lr_timer;
|
|
|
|
struct dentry *debugfs_dir;
|
|
};
|
|
|
|
/**
|
|
* 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);
|