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 void (*callback
) (void *data
, int db_num
);
112 struct ntb_device
*ndev
;
116 struct pci_dev
*pdev
;
117 struct msix_entry
*msix_entries
;
118 void __iomem
*reg_base
;
119 struct ntb_mw mw
[NTB_MAX_NUM_MW
];
121 unsigned char max_mw
;
122 unsigned char max_spads
;
123 unsigned char max_db_bits
;
124 unsigned char msix_cnt
;
128 void __iomem
*ldb_mask
;
130 void __iomem
*bar2_xlat
;
131 void __iomem
*bar4_xlat
;
132 void __iomem
*spad_write
;
133 void __iomem
*spad_read
;
134 void __iomem
*lnk_cntl
;
135 void __iomem
*lnk_stat
;
136 void __iomem
*spci_cmd
;
138 struct ntb_transport
*ntb_transport
;
139 void (*event_cb
)(void *handle
, enum ntb_hw_event event
);
141 struct ntb_db_cb
*db_cb
;
142 unsigned char hw_type
;
143 unsigned char conn_type
;
144 unsigned char dev_type
;
145 unsigned char num_msix
;
146 unsigned char bits_per_vector
;
147 unsigned char max_cbs
;
148 unsigned char link_width
;
149 unsigned char link_speed
;
150 unsigned char link_status
;
152 struct delayed_work hb_timer
;
153 unsigned long last_ts
;
155 struct delayed_work lr_timer
;
157 struct dentry
*debugfs_dir
;
161 * ntb_max_cbs() - return the max callbacks
162 * @ndev: pointer to ntb_device instance
164 * Given the ntb pointer, return the maximum number of callbacks
166 * RETURNS: the maximum number of callbacks
168 static inline unsigned char ntb_max_cbs(struct ntb_device
*ndev
)
170 return ndev
->max_cbs
;
174 * ntb_max_mw() - return the max number of memory windows
175 * @ndev: pointer to ntb_device instance
177 * Given the ntb pointer, return the maximum number of memory windows
179 * RETURNS: the maximum number of memory windows
181 static inline unsigned char ntb_max_mw(struct ntb_device
*ndev
)
183 return ndev
->limits
.max_mw
;
187 * ntb_hw_link_status() - return the hardware link status
188 * @ndev: pointer to ntb_device instance
190 * Returns true if the hardware is connected to the remote system
192 * RETURNS: true or false based on the hardware link state
194 static inline bool ntb_hw_link_status(struct ntb_device
*ndev
)
196 return ndev
->link_status
== NTB_LINK_UP
;
200 * ntb_query_pdev() - return the pci_dev pointer
201 * @ndev: pointer to ntb_device instance
203 * Given the ntb pointer, return the pci_dev pointer for the NTB hardware device
205 * RETURNS: a pointer to the ntb pci_dev
207 static inline struct pci_dev
*ntb_query_pdev(struct ntb_device
*ndev
)
213 * ntb_query_debugfs() - return the debugfs pointer
214 * @ndev: pointer to ntb_device instance
216 * Given the ntb pointer, return the debugfs directory pointer for the NTB
219 * RETURNS: a pointer to the debugfs directory
221 static inline struct dentry
*ntb_query_debugfs(struct ntb_device
*ndev
)
223 return ndev
->debugfs_dir
;
226 struct ntb_device
*ntb_register_transport(struct pci_dev
*pdev
,
228 void ntb_unregister_transport(struct ntb_device
*ndev
);
229 void ntb_set_mw_addr(struct ntb_device
*ndev
, unsigned int mw
, u64 addr
);
230 int ntb_register_db_callback(struct ntb_device
*ndev
, unsigned int idx
,
231 void *data
, void (*db_cb_func
) (void *data
,
233 void ntb_unregister_db_callback(struct ntb_device
*ndev
, unsigned int idx
);
234 int ntb_register_event_callback(struct ntb_device
*ndev
,
235 void (*event_cb_func
) (void *handle
,
236 enum ntb_hw_event event
));
237 void ntb_unregister_event_callback(struct ntb_device
*ndev
);
238 int ntb_get_max_spads(struct ntb_device
*ndev
);
239 int ntb_write_local_spad(struct ntb_device
*ndev
, unsigned int idx
, u32 val
);
240 int ntb_read_local_spad(struct ntb_device
*ndev
, unsigned int idx
, u32
*val
);
241 int ntb_write_remote_spad(struct ntb_device
*ndev
, unsigned int idx
, u32 val
);
242 int ntb_read_remote_spad(struct ntb_device
*ndev
, unsigned int idx
, u32
*val
);
243 resource_size_t
ntb_get_mw_base(struct ntb_device
*ndev
, unsigned int mw
);
244 void __iomem
*ntb_get_mw_vbase(struct ntb_device
*ndev
, unsigned int mw
);
245 u64
ntb_get_mw_size(struct ntb_device
*ndev
, unsigned int mw
);
246 void ntb_ring_doorbell(struct ntb_device
*ndev
, unsigned int idx
);
247 void *ntb_find_transport(struct pci_dev
*pdev
);
249 int ntb_transport_init(struct pci_dev
*pdev
);
250 void ntb_transport_free(void *transport
);
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