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1 | /* |
2 | * Parallel SCSI (SPI) transport specific attributes exported to sysfs. |
3 | * |
4 | * Copyright (c) 2003 Silicon Graphics, Inc. All rights reserved. |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify |
7 | * it under the terms of the GNU General Public License as published by |
8 | * the Free Software Foundation; either version 2 of the License, or |
9 | * (at your option) any later version. |
10 | * |
11 | * This program is distributed in the hope that it will be useful, |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
14 | * GNU General Public License for more details. |
15 | * |
16 | * You should have received a copy of the GNU General Public License |
17 | * along with this program; if not, write to the Free Software |
18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
19 | */ |
20 | #ifndef SCSI_TRANSPORT_SPI_H |
21 | #define SCSI_TRANSPORT_SPI_H |
22 | |
23 | #include <linux/transport_class.h> |
24 | #include <linux/mutex.h> |
25 | |
26 | struct scsi_transport_template; |
27 | struct scsi_target; |
28 | struct scsi_device; |
29 | struct Scsi_Host; |
30 | |
31 | struct spi_transport_attrs { |
32 | int period; /* value in the PPR/SDTR command */ |
33 | int min_period; |
34 | int offset; |
35 | int max_offset; |
36 | unsigned int width:1; /* 0 - narrow, 1 - wide */ |
37 | unsigned int max_width:1; |
38 | unsigned int iu:1; /* Information Units enabled */ |
39 | unsigned int max_iu:1; |
40 | unsigned int dt:1; /* DT clocking enabled */ |
41 | unsigned int qas:1; /* Quick Arbitration and Selection enabled */ |
42 | unsigned int max_qas:1; |
43 | unsigned int wr_flow:1; /* Write Flow control enabled */ |
44 | unsigned int rd_strm:1; /* Read streaming enabled */ |
45 | unsigned int rti:1; /* Retain Training Information */ |
46 | unsigned int pcomp_en:1;/* Precompensation enabled */ |
47 | unsigned int hold_mcs:1;/* Hold Margin Control Settings */ |
48 | unsigned int initial_dv:1; /* DV done to this target yet */ |
49 | unsigned long flags; /* flags field for drivers to use */ |
50 | /* Device Properties fields */ |
51 | unsigned int support_sync:1; /* synchronous support */ |
52 | unsigned int support_wide:1; /* wide support */ |
53 | unsigned int support_dt:1; /* allows DT phases */ |
54 | unsigned int support_dt_only; /* disallows ST phases */ |
55 | unsigned int support_ius; /* support Information Units */ |
56 | unsigned int support_qas; /* supports quick arbitration and selection */ |
57 | /* Private Fields */ |
58 | unsigned int dv_pending:1; /* Internal flag: DV Requested */ |
59 | unsigned int dv_in_progress:1; /* Internal: DV started */ |
60 | struct mutex dv_mutex; /* semaphore to serialise dv */ |
61 | }; |
62 | |
63 | enum spi_signal_type { |
64 | SPI_SIGNAL_UNKNOWN = 1, |
65 | SPI_SIGNAL_SE, |
66 | SPI_SIGNAL_LVD, |
67 | SPI_SIGNAL_HVD, |
68 | }; |
69 | |
70 | struct spi_host_attrs { |
71 | enum spi_signal_type signalling; |
72 | }; |
73 | |
74 | /* accessor functions */ |
75 | #define spi_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->period) |
76 | #define spi_min_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->min_period) |
77 | #define spi_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->offset) |
78 | #define spi_max_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_offset) |
79 | #define spi_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->width) |
80 | #define spi_max_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_width) |
81 | #define spi_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->iu) |
82 | #define spi_max_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_iu) |
83 | #define spi_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dt) |
84 | #define spi_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->qas) |
85 | #define spi_max_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->max_qas) |
86 | #define spi_wr_flow(x) (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow) |
87 | #define spi_rd_strm(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm) |
88 | #define spi_rti(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rti) |
89 | #define spi_pcomp_en(x) (((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en) |
90 | #define spi_hold_mcs(x) (((struct spi_transport_attrs *)&(x)->starget_data)->hold_mcs) |
91 | #define spi_initial_dv(x) (((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv) |
92 | #define spi_dv_pending(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dv_pending) |
93 | |
94 | #define spi_support_sync(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_sync) |
95 | #define spi_support_wide(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_wide) |
96 | #define spi_support_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt) |
97 | #define spi_support_dt_only(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only) |
98 | #define spi_support_ius(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_ius) |
99 | #define spi_support_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_qas) |
100 | |
101 | #define spi_flags(x) (((struct spi_transport_attrs *)&(x)->starget_data)->flags) |
102 | #define spi_signalling(h) (((struct spi_host_attrs *)(h)->shost_data)->signalling) |
103 | |
104 | |
105 | |
106 | /* The functions by which the transport class and the driver communicate */ |
107 | struct spi_function_template { |
108 | void (*get_period)(struct scsi_target *); |
109 | void (*set_period)(struct scsi_target *, int); |
110 | void (*get_offset)(struct scsi_target *); |
111 | void (*set_offset)(struct scsi_target *, int); |
112 | void (*get_width)(struct scsi_target *); |
113 | void (*set_width)(struct scsi_target *, int); |
114 | void (*get_iu)(struct scsi_target *); |
115 | void (*set_iu)(struct scsi_target *, int); |
116 | void (*get_dt)(struct scsi_target *); |
117 | void (*set_dt)(struct scsi_target *, int); |
118 | void (*get_qas)(struct scsi_target *); |
119 | void (*set_qas)(struct scsi_target *, int); |
120 | void (*get_wr_flow)(struct scsi_target *); |
121 | void (*set_wr_flow)(struct scsi_target *, int); |
122 | void (*get_rd_strm)(struct scsi_target *); |
123 | void (*set_rd_strm)(struct scsi_target *, int); |
124 | void (*get_rti)(struct scsi_target *); |
125 | void (*set_rti)(struct scsi_target *, int); |
126 | void (*get_pcomp_en)(struct scsi_target *); |
127 | void (*set_pcomp_en)(struct scsi_target *, int); |
128 | void (*get_hold_mcs)(struct scsi_target *); |
129 | void (*set_hold_mcs)(struct scsi_target *, int); |
130 | void (*get_signalling)(struct Scsi_Host *); |
131 | void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type); |
132 | int (*deny_binding)(struct scsi_target *); |
133 | /* The driver sets these to tell the transport class it |
134 | * wants the attributes displayed in sysfs. If the show_ flag |
135 | * is not set, the attribute will be private to the transport |
136 | * class */ |
137 | unsigned long show_period:1; |
138 | unsigned long show_offset:1; |
139 | unsigned long show_width:1; |
140 | unsigned long show_iu:1; |
141 | unsigned long show_dt:1; |
142 | unsigned long show_qas:1; |
143 | unsigned long show_wr_flow:1; |
144 | unsigned long show_rd_strm:1; |
145 | unsigned long show_rti:1; |
146 | unsigned long show_pcomp_en:1; |
147 | unsigned long show_hold_mcs:1; |
148 | }; |
149 | |
150 | struct scsi_transport_template *spi_attach_transport(struct spi_function_template *); |
151 | void spi_release_transport(struct scsi_transport_template *); |
152 | void spi_schedule_dv_device(struct scsi_device *); |
153 | void spi_dv_device(struct scsi_device *); |
154 | void spi_display_xfer_agreement(struct scsi_target *); |
155 | int spi_print_msg(const unsigned char *); |
156 | int spi_populate_width_msg(unsigned char *msg, int width); |
157 | int spi_populate_sync_msg(unsigned char *msg, int period, int offset); |
158 | int spi_populate_ppr_msg(unsigned char *msg, int period, int offset, int width, |
159 | int options); |
160 | |
161 | #endif /* SCSI_TRANSPORT_SPI_H */ |
162 |
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