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fce8a7bb JM |
1 | /* |
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. | |
4 | * | |
5 | * GPL LICENSE SUMMARY | |
6 | * | |
7 | * Copyright(c) 2012 Intel Corporation. All rights reserved. | |
8 | * | |
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. | |
12 | * | |
13 | * BSD LICENSE | |
14 | * | |
15 | * Copyright(c) 2012 Intel Corporation. All rights reserved. | |
16 | * | |
17 | * Redistribution and use in source and binary forms, with or without | |
18 | * modification, are permitted provided that the following conditions | |
19 | * are met: | |
20 | * | |
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 | |
26 | * distribution. | |
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. | |
30 | * | |
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. | |
42 | * | |
43 | * Intel PCIe NTB Linux driver | |
44 | * | |
45 | * Contact Information: | |
46 | * Jon Mason <jon.mason@intel.com> | |
47 | */ | |
48 | ||
49 | #define PCI_DEVICE_ID_INTEL_NTB_B2B_JSF 0x3725 | |
50 | #define PCI_DEVICE_ID_INTEL_NTB_CLASSIC_JSF 0x3726 | |
51 | #define PCI_DEVICE_ID_INTEL_NTB_RP_JSF 0x3727 | |
52 | #define PCI_DEVICE_ID_INTEL_NTB_RP_SNB 0x3C08 | |
53 | #define PCI_DEVICE_ID_INTEL_NTB_B2B_SNB 0x3C0D | |
54 | #define PCI_DEVICE_ID_INTEL_NTB_CLASSIC_SNB 0x3C0E | |
55 | #define PCI_DEVICE_ID_INTEL_NTB_2ND_SNB 0x3C0F | |
56 | #define PCI_DEVICE_ID_INTEL_NTB_B2B_BWD 0x0C4E | |
57 | ||
58 | #define msix_table_size(control) ((control & PCI_MSIX_FLAGS_QSIZE)+1) | |
59 | ||
60 | #define NTB_BAR_MMIO 0 | |
61 | #define NTB_BAR_23 2 | |
62 | #define NTB_BAR_45 4 | |
63 | #define NTB_BAR_MASK ((1 << NTB_BAR_MMIO) | (1 << NTB_BAR_23) |\ | |
64 | (1 << NTB_BAR_45)) | |
65 | ||
66 | #define NTB_LINK_DOWN 0 | |
67 | #define NTB_LINK_UP 1 | |
68 | ||
69 | #define NTB_HB_TIMEOUT msecs_to_jiffies(1000) | |
70 | ||
948d3a65 | 71 | #define NTB_MAX_NUM_MW 2 |
fce8a7bb JM |
72 | |
73 | enum ntb_hw_event { | |
74 | NTB_EVENT_SW_EVENT0 = 0, | |
75 | NTB_EVENT_SW_EVENT1, | |
76 | NTB_EVENT_SW_EVENT2, | |
77 | NTB_EVENT_HW_ERROR, | |
78 | NTB_EVENT_HW_LINK_UP, | |
79 | NTB_EVENT_HW_LINK_DOWN, | |
80 | }; | |
81 | ||
82 | struct ntb_mw { | |
83 | dma_addr_t phys_addr; | |
84 | void __iomem *vbase; | |
85 | resource_size_t bar_sz; | |
86 | }; | |
87 | ||
88 | struct ntb_db_cb { | |
89 | void (*callback) (void *data, int db_num); | |
90 | unsigned int db_num; | |
91 | void *data; | |
92 | struct ntb_device *ndev; | |
93 | }; | |
94 | ||
95 | struct ntb_device { | |
96 | struct pci_dev *pdev; | |
97 | struct msix_entry *msix_entries; | |
98 | void __iomem *reg_base; | |
948d3a65 | 99 | struct ntb_mw mw[NTB_MAX_NUM_MW]; |
fce8a7bb | 100 | struct { |
948d3a65 JM |
101 | unsigned char max_mw; |
102 | unsigned char max_spads; | |
103 | unsigned char max_db_bits; | |
104 | unsigned char msix_cnt; | |
fce8a7bb JM |
105 | } limits; |
106 | struct { | |
107 | void __iomem *pdb; | |
108 | void __iomem *pdb_mask; | |
109 | void __iomem *sdb; | |
110 | void __iomem *sbar2_xlat; | |
111 | void __iomem *sbar4_xlat; | |
112 | void __iomem *spad_write; | |
113 | void __iomem *spad_read; | |
114 | void __iomem *lnk_cntl; | |
115 | void __iomem *lnk_stat; | |
116 | void __iomem *spci_cmd; | |
117 | } reg_ofs; | |
118 | struct ntb_transport *ntb_transport; | |
119 | void (*event_cb)(void *handle, enum ntb_hw_event event); | |
120 | ||
121 | struct ntb_db_cb *db_cb; | |
122 | unsigned char hw_type; | |
123 | unsigned char conn_type; | |
124 | unsigned char dev_type; | |
125 | unsigned char num_msix; | |
126 | unsigned char bits_per_vector; | |
127 | unsigned char max_cbs; | |
113bf1c9 JM |
128 | unsigned char link_width; |
129 | unsigned char link_speed; | |
fce8a7bb | 130 | unsigned char link_status; |
113bf1c9 | 131 | |
fce8a7bb JM |
132 | struct delayed_work hb_timer; |
133 | unsigned long last_ts; | |
1517a3f2 | 134 | |
113bf1c9 JM |
135 | struct delayed_work lr_timer; |
136 | ||
1517a3f2 | 137 | struct dentry *debugfs_dir; |
fce8a7bb JM |
138 | }; |
139 | ||
948d3a65 JM |
140 | /** |
141 | * ntb_max_cbs() - return the max callbacks | |
142 | * @ndev: pointer to ntb_device instance | |
143 | * | |
144 | * Given the ntb pointer, return the maximum number of callbacks | |
145 | * | |
146 | * RETURNS: the maximum number of callbacks | |
147 | */ | |
148 | static inline unsigned char ntb_max_cbs(struct ntb_device *ndev) | |
149 | { | |
150 | return ndev->max_cbs; | |
151 | } | |
152 | ||
153 | /** | |
154 | * ntb_max_mw() - return the max number of memory windows | |
155 | * @ndev: pointer to ntb_device instance | |
156 | * | |
157 | * Given the ntb pointer, return the maximum number of memory windows | |
158 | * | |
159 | * RETURNS: the maximum number of memory windows | |
160 | */ | |
161 | static inline unsigned char ntb_max_mw(struct ntb_device *ndev) | |
162 | { | |
163 | return ndev->limits.max_mw; | |
164 | } | |
165 | ||
fce8a7bb JM |
166 | /** |
167 | * ntb_hw_link_status() - return the hardware link status | |
168 | * @ndev: pointer to ntb_device instance | |
169 | * | |
170 | * Returns true if the hardware is connected to the remote system | |
171 | * | |
172 | * RETURNS: true or false based on the hardware link state | |
173 | */ | |
174 | static inline bool ntb_hw_link_status(struct ntb_device *ndev) | |
175 | { | |
176 | return ndev->link_status == NTB_LINK_UP; | |
177 | } | |
178 | ||
179 | /** | |
180 | * ntb_query_pdev() - return the pci_dev pointer | |
181 | * @ndev: pointer to ntb_device instance | |
182 | * | |
948d3a65 | 183 | * Given the ntb pointer, return the pci_dev pointer for the NTB hardware device |
fce8a7bb JM |
184 | * |
185 | * RETURNS: a pointer to the ntb pci_dev | |
186 | */ | |
187 | static inline struct pci_dev *ntb_query_pdev(struct ntb_device *ndev) | |
188 | { | |
189 | return ndev->pdev; | |
190 | } | |
191 | ||
1517a3f2 JM |
192 | /** |
193 | * ntb_query_debugfs() - return the debugfs pointer | |
194 | * @ndev: pointer to ntb_device instance | |
195 | * | |
196 | * Given the ntb pointer, return the debugfs directory pointer for the NTB | |
197 | * hardware device | |
198 | * | |
199 | * RETURNS: a pointer to the debugfs directory | |
200 | */ | |
201 | static inline struct dentry *ntb_query_debugfs(struct ntb_device *ndev) | |
202 | { | |
203 | return ndev->debugfs_dir; | |
204 | } | |
205 | ||
fce8a7bb JM |
206 | struct ntb_device *ntb_register_transport(struct pci_dev *pdev, |
207 | void *transport); | |
208 | void ntb_unregister_transport(struct ntb_device *ndev); | |
209 | void ntb_set_mw_addr(struct ntb_device *ndev, unsigned int mw, u64 addr); | |
210 | int ntb_register_db_callback(struct ntb_device *ndev, unsigned int idx, | |
211 | void *data, void (*db_cb_func) (void *data, | |
212 | int db_num)); | |
213 | void ntb_unregister_db_callback(struct ntb_device *ndev, unsigned int idx); | |
214 | int ntb_register_event_callback(struct ntb_device *ndev, | |
215 | void (*event_cb_func) (void *handle, | |
74465645 | 216 | enum ntb_hw_event event)); |
fce8a7bb JM |
217 | void ntb_unregister_event_callback(struct ntb_device *ndev); |
218 | int ntb_get_max_spads(struct ntb_device *ndev); | |
219 | int ntb_write_local_spad(struct ntb_device *ndev, unsigned int idx, u32 val); | |
220 | int ntb_read_local_spad(struct ntb_device *ndev, unsigned int idx, u32 *val); | |
221 | int ntb_write_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 val); | |
222 | int ntb_read_remote_spad(struct ntb_device *ndev, unsigned int idx, u32 *val); | |
74465645 | 223 | void __iomem *ntb_get_mw_vbase(struct ntb_device *ndev, unsigned int mw); |
fce8a7bb JM |
224 | resource_size_t ntb_get_mw_size(struct ntb_device *ndev, unsigned int mw); |
225 | void ntb_ring_sdb(struct ntb_device *ndev, unsigned int idx); | |
226 | void *ntb_find_transport(struct pci_dev *pdev); | |
227 | ||
228 | int ntb_transport_init(struct pci_dev *pdev); | |
229 | void ntb_transport_free(void *transport); |