1 files changed, 181 insertions, 0 deletions

diff --git a/drivers/ntb/ntb_hw.h b/drivers/ntb/ntb_hw.h
new file mode 100644
index 000000000000..3a3038ca83e6
--- /dev/null
+++ b/drivers/ntb/ntb_hw.h
@@ -0,0 +1,181 @@
+/*
+ * 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_CLASSIC_JSF     0x3726
+#define PCI_DEVICE_ID_INTEL_NTB_RP_JSF          0x3727
+#define PCI_DEVICE_ID_INTEL_NTB_RP_SNB          0x3C08
+#define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB         0x3C0D
+#define PCI_DEVICE_ID_INTEL_NTB_CLASSIC_SNB     0x3C0E
+#define PCI_DEVICE_ID_INTEL_NTB_2ND_SNB         0x3C0F
+#define PCI_DEVICE_ID_INTEL_NTB_B2B_BWD         0x0C4E
+
+#define msix_table_size(control)        ((control & PCI_MSIX_FLAGS_QSIZE)+1)
+
+#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_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 {
+        void (*callback) (void *data, int db_num);
+        unsigned int db_num;
+        void *data;
+        struct ntb_device *ndev;
+};
+
+struct ntb_device {
+        struct pci_dev *pdev;
+        struct msix_entry *msix_entries;
+        void __iomem *reg_base;
+        struct ntb_mw mw[NTB_NUM_MW];
+        struct {
+                unsigned int max_spads;
+                unsigned int max_db_bits;
+                unsigned int msix_cnt;
+        } limits;
+        struct {
+                void __iomem *pdb;
+                void __iomem *pdb_mask;
+                void __iomem *sdb;
+                void __iomem *sbar2_xlat;
+                void __iomem *sbar4_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_status;
+        struct delayed_work hb_timer;
+        unsigned long last_ts;
+};
+
+/**
+ * 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 pointerfor 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;
+}
+
+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, void (*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);
+void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw);
+resource_size_t ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw);
+void ntb_ring_sdb(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);