2 * This file is provided under a dual BSD/GPLv2 license. When using or
3 * redistributing this file, you may do so under either license.
7 * Copyright(c) 2012 Intel Corporation. All rights reserved.
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of version 2 of the GNU General Public License as
11 * published by the Free Software Foundation.
15 * Copyright(c) 2012 Intel Corporation. All rights reserved.
17 * Redistribution and use in source and binary forms, with or without
18 * modification, are permitted provided that the following conditions
21 * * Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * * Redistributions in binary form must reproduce the above copy
24 * notice, this list of conditions and the following disclaimer in
25 * the documentation and/or other materials provided with the
27 * * Neither the name of Intel Corporation nor the names of its
28 * contributors may be used to endorse or promote products derived
29 * from this software without specific prior written permission.
31 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
32 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
33 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
34 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
35 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
36 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
37 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
38 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
39 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
41 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
43 * Intel PCIe NTB Linux driver
45 * Contact Information:
46 * Jon Mason <jon.mason@intel.com>
49 #define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725
50 #define PCI_DEVICE_ID_INTEL_NTB_PS_JSF 0x3726
51 #define PCI_DEVICE_ID_INTEL_NTB_SS_JSF 0x3727
52 #define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB 0x3C0D
53 #define PCI_DEVICE_ID_INTEL_NTB_PS_SNB 0x3C0E
54 #define PCI_DEVICE_ID_INTEL_NTB_SS_SNB 0x3C0F
55 #define PCI_DEVICE_ID_INTEL_NTB_B2B_IVT 0x0E0D
56 #define PCI_DEVICE_ID_INTEL_NTB_PS_IVT 0x0E0E
57 #define PCI_DEVICE_ID_INTEL_NTB_SS_IVT 0x0E0F
58 #define PCI_DEVICE_ID_INTEL_NTB_B2B_HSX 0x2F0D
59 #define PCI_DEVICE_ID_INTEL_NTB_PS_HSX 0x2F0E
60 #define PCI_DEVICE_ID_INTEL_NTB_SS_HSX 0x2F0F
61 #define PCI_DEVICE_ID_INTEL_NTB_B2B_BWD 0x0C4E
63 #define msix_table_size(control) ((control & PCI_MSIX_FLAGS_QSIZE)+1)
66 static inline u64 readq(void __iomem *addr)
68 return readl(addr) | (((u64) readl(addr + 4)) << 32LL);
73 static inline void writeq(u64 val, void __iomem *addr)
75 writel(val & 0xffffffff, addr);
76 writel(val >> 32, addr + 4);
80 #define NTB_BAR_MMIO 0
83 #define NTB_BAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\
86 #define NTB_LINK_DOWN 0
89 #define NTB_HB_TIMEOUT msecs_to_jiffies(1000)
91 #define NTB_MAX_NUM_MW 2
94 NTB_EVENT_SW_EVENT0 = 0,
99 NTB_EVENT_HW_LINK_DOWN,
103 dma_addr_t phys_addr;
105 resource_size_t bar_sz;
109 int (*callback)(void *data, int db_num);
112 struct ntb_device *ndev;
113 struct tasklet_struct irq_work;
117 struct pci_dev *pdev;
118 struct msix_entry *msix_entries;
119 void __iomem *reg_base;
120 struct ntb_mw mw[NTB_MAX_NUM_MW];
122 unsigned char max_mw;
123 unsigned char max_spads;
124 unsigned char max_db_bits;
125 unsigned char msix_cnt;
129 void __iomem *ldb_mask;
131 void __iomem *bar2_xlat;
132 void __iomem *bar4_xlat;
133 void __iomem *spad_write;
134 void __iomem *spad_read;
135 void __iomem *lnk_cntl;
136 void __iomem *lnk_stat;
137 void __iomem *spci_cmd;
139 struct ntb_transport *ntb_transport;
140 void (*event_cb)(void *handle, enum ntb_hw_event event);
142 struct ntb_db_cb *db_cb;
143 unsigned char hw_type;
144 unsigned char conn_type;
145 unsigned char dev_type;
146 unsigned char num_msix;
147 unsigned char bits_per_vector;
148 unsigned char max_cbs;
149 unsigned char link_width;
150 unsigned char link_speed;
151 unsigned char link_status;
153 struct delayed_work hb_timer;
154 unsigned long last_ts;
156 struct delayed_work lr_timer;
158 struct dentry *debugfs_dir;
162 * ntb_max_cbs() - return the max callbacks
163 * @ndev: pointer to ntb_device instance
165 * Given the ntb pointer, return the maximum number of callbacks
167 * RETURNS: the maximum number of callbacks
169 static inline unsigned char ntb_max_cbs(struct ntb_device *ndev)
171 return ndev->max_cbs;
175 * ntb_max_mw() - return the max number of memory windows
176 * @ndev: pointer to ntb_device instance
178 * Given the ntb pointer, return the maximum number of memory windows
180 * RETURNS: the maximum number of memory windows
182 static inline unsigned char ntb_max_mw(struct ntb_device *ndev)
184 return ndev->limits.max_mw;
188 * ntb_hw_link_status() - return the hardware link status
189 * @ndev: pointer to ntb_device instance
191 * Returns true if the hardware is connected to the remote system
193 * RETURNS: true or false based on the hardware link state
195 static inline bool ntb_hw_link_status(struct ntb_device *ndev)
197 return ndev->link_status == NTB_LINK_UP;
201 * ntb_query_pdev() - return the pci_dev pointer
202 * @ndev: pointer to ntb_device instance
204 * Given the ntb pointer, return the pci_dev pointer for the NTB hardware device
206 * RETURNS: a pointer to the ntb pci_dev
208 static inline struct pci_dev *ntb_query_pdev(struct ntb_device *ndev)
214 * ntb_query_debugfs() - return the debugfs pointer
215 * @ndev: pointer to ntb_device instance
217 * Given the ntb pointer, return the debugfs directory pointer for the NTB
220 * RETURNS: a pointer to the debugfs directory
222 static inline struct dentry *ntb_query_debugfs(struct ntb_device *ndev)
224 return ndev->debugfs_dir;
227 struct ntb_device *ntb_register_transport(struct pci_dev *pdev,
229 void ntb_unregister_transport(struct ntb_device *ndev);
230 void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr);
231 int ntb_register_db_callback(struct ntb_device *ndev, unsigned int idx,
232 void *data, int (*db_cb_func)(void *data,
234 void ntb_unregister_db_callback(struct ntb_device *ndev, unsigned int idx);
235 int ntb_register_event_callback(struct ntb_device *ndev,
236 void (*event_cb_func) (void *handle,
237 enum ntb_hw_event event));
238 void ntb_unregister_event_callback(struct ntb_device *ndev);
239 int ntb_get_max_spads(struct ntb_device *ndev);
240 int ntb_write_local_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
241 int ntb_read_local_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
242 int ntb_write_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 val);
243 int ntb_read_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 *val);
244 resource_size_t ntb_get_mw_base(struct ntb_device *ndev, unsigned int mw);
245 void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw);
246 u64 ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw);
247 void ntb_ring_doorbell(struct ntb_device *ndev, unsigned int idx);
248 void *ntb_find_transport(struct pci_dev *pdev);
250 int ntb_transport_init(struct pci_dev *pdev);
251 void ntb_transport_free(void *transport);