--- /dev/null
+/*
+ * 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);
Code Review / kvmfornfv.git / blobdiff