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1517a3f21a
Debugfs was setup in NTB to only have a single debugfs directory. This resulted in the leaking of debugfs directories and files when multiple NTB devices were present, due to each device stomping on the variables containing the previous device's values (thus preventing them from being freed on cleanup). Correct this by creating a secondary directory of the PCI BDF for each device present, and nesting the previously existing information in those directories. Signed-off-by: Jon Mason <jon.mason@intel.com>
198 lines
6.4 KiB
C
198 lines
6.4 KiB
C
/*
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* This file is provided under a dual BSD/GPLv2 license. When using or
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* redistributing this file, you may do so under either license.
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*
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* GPL LICENSE SUMMARY
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*
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* Copyright(c) 2012 Intel Corporation. All rights reserved.
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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 version 2 of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* BSD LICENSE
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*
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* Copyright(c) 2012 Intel Corporation. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copy
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Intel PCIe NTB Linux driver
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*
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* Contact Information:
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* Jon Mason <jon.mason@intel.com>
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*/
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#define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725
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#define PCI_DEVICE_ID_INTEL_NTB_CLASSIC_JSF 0x3726
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#define PCI_DEVICE_ID_INTEL_NTB_RP_JSF 0x3727
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#define PCI_DEVICE_ID_INTEL_NTB_RP_SNB 0x3C08
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#define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB 0x3C0D
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#define PCI_DEVICE_ID_INTEL_NTB_CLASSIC_SNB 0x3C0E
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#define PCI_DEVICE_ID_INTEL_NTB_2ND_SNB 0x3C0F
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#define PCI_DEVICE_ID_INTEL_NTB_B2B_BWD 0x0C4E
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#define msix_table_size(control) ((control & PCI_MSIX_FLAGS_QSIZE)+1)
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#define NTB_BAR_MMIO 0
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#define NTB_BAR_23 2
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#define NTB_BAR_45 4
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#define NTB_BAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\
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(1 << NTB_BAR_45))
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#define NTB_LINK_DOWN 0
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#define NTB_LINK_UP 1
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#define NTB_HB_TIMEOUT msecs_to_jiffies(1000)
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#define NTB_NUM_MW 2
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enum ntb_hw_event {
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NTB_EVENT_SW_EVENT0 = 0,
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NTB_EVENT_SW_EVENT1,
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NTB_EVENT_SW_EVENT2,
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NTB_EVENT_HW_ERROR,
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NTB_EVENT_HW_LINK_UP,
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NTB_EVENT_HW_LINK_DOWN,
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};
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struct ntb_mw {
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dma_addr_t phys_addr;
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void __iomem *vbase;
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resource_size_t bar_sz;
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};
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struct ntb_db_cb {
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void (*callback) (void *data, int db_num);
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unsigned int db_num;
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void *data;
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struct ntb_device *ndev;
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};
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struct ntb_device {
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struct pci_dev *pdev;
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struct msix_entry *msix_entries;
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void __iomem *reg_base;
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struct ntb_mw mw[NTB_NUM_MW];
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struct {
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unsigned int max_spads;
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unsigned int max_db_bits;
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unsigned int msix_cnt;
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} limits;
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struct {
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void __iomem *pdb;
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void __iomem *pdb_mask;
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void __iomem *sdb;
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void __iomem *sbar2_xlat;
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void __iomem *sbar4_xlat;
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void __iomem *spad_write;
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void __iomem *spad_read;
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void __iomem *lnk_cntl;
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void __iomem *lnk_stat;
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void __iomem *spci_cmd;
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} reg_ofs;
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struct ntb_transport *ntb_transport;
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void (*event_cb)(void *handle, enum ntb_hw_event event);
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struct ntb_db_cb *db_cb;
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unsigned char hw_type;
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unsigned char conn_type;
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unsigned char dev_type;
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unsigned char num_msix;
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unsigned char bits_per_vector;
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unsigned char max_cbs;
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unsigned char link_status;
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struct delayed_work hb_timer;
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unsigned long last_ts;
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struct dentry *debugfs_dir;
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};
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/**
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* ntb_hw_link_status() - return the hardware link status
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* @ndev: pointer to ntb_device instance
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*
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* Returns true if the hardware is connected to the remote system
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*
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* RETURNS: true or false based on the hardware link state
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*/
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static inline bool ntb_hw_link_status(struct ntb_device *ndev)
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{
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return ndev->link_status == NTB_LINK_UP;
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}
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/**
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* ntb_query_pdev() - return the pci_dev pointer
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* @ndev: pointer to ntb_device instance
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*
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* Given the ntb pointer return the pci_dev pointerfor the NTB hardware device
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*
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* RETURNS: a pointer to the ntb pci_dev
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*/
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static inline struct pci_dev *ntb_query_pdev(struct ntb_device *ndev)
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{
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return ndev->pdev;
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}
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/**
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* ntb_query_debugfs() - return the debugfs pointer
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* @ndev: pointer to ntb_device instance
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*
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* Given the ntb pointer, return the debugfs directory pointer for the NTB
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* hardware device
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*
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* RETURNS: a pointer to the debugfs directory
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*/
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static inline struct dentry *ntb_query_debugfs(struct ntb_device *ndev)
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{
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return ndev->debugfs_dir;
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}
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struct ntb_device *ntb_register_transport(struct pci_dev *pdev,
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void *transport);
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void ntb_unregister_transport(struct ntb_device *ndev);
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void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr);
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int ntb_register_db_callback(struct ntb_device *ndev, unsigned int idx,
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void *data, void (*db_cb_func) (void *data,
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int db_num));
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void ntb_unregister_db_callback(struct ntb_device *ndev, unsigned int idx);
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int ntb_register_event_callback(struct ntb_device *ndev,
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void (*event_cb_func) (void *handle,
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enum ntb_hw_event event));
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void ntb_unregister_event_callback(struct ntb_device *ndev);
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int ntb_get_max_spads(struct ntb_device *ndev);
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int ntb_write_local_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
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int ntb_read_local_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
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int ntb_write_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
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int ntb_read_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
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void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw);
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resource_size_t ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw);
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void ntb_ring_sdb(struct ntb_device *ndev, unsigned int idx);
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void *ntb_find_transport(struct pci_dev *pdev);
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int ntb_transport_init(struct pci_dev *pdev);
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void ntb_transport_free(void *transport);
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