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/config.h> 24 #include <linux/transport_class.h> 25 26 struct scsi_transport_template; 27 28 struct spi_transport_attrs { 29 int period; /* value in the PPR/SDTR command */ 30 int offset; 31 unsigned int width:1; /* 0 - narrow, 1 - wide */ 32 unsigned int iu:1; /* Information Units enabled */ 33 unsigned int dt:1; /* DT clocking enabled */ 34 unsigned int qas:1; /* Quick Arbitration and Selection enabled */ 35 unsigned int wr_flow:1; /* Write Flow control enabled */ 36 unsigned int rd_strm:1; /* Read streaming enabled */ 37 unsigned int rti:1; /* Retain Training Information */ 38 unsigned int pcomp_en:1;/* Precompensation enabled */ 39 unsigned int initial_dv:1; /* DV done to this target yet */ 40 unsigned long flags; /* flags field for drivers to use */ 41 /* Device Properties fields */ 42 unsigned int support_sync:1; /* synchronous support */ 43 unsigned int support_wide:1; /* wide support */ 44 unsigned int support_dt:1; /* allows DT phases */ 45 unsigned int support_dt_only; /* disallows ST phases */ 46 unsigned int support_ius; /* support Information Units */ 47 unsigned int support_qas; /* supports quick arbitration and selection */ 48 /* Private Fields */ 49 unsigned int dv_pending:1; /* Internal flag */ 50 struct semaphore dv_sem; /* semaphore to serialise dv */ 51 }; 52 53 enum spi_signal_type { 54 SPI_SIGNAL_UNKNOWN = 1, 55 SPI_SIGNAL_SE, 56 SPI_SIGNAL_LVD, 57 SPI_SIGNAL_HVD, 58 }; 59 60 struct spi_host_attrs { 61 enum spi_signal_type signalling; 62 }; 63 64 /* accessor functions */ 65 #define spi_period(x) (((struct spi_transport_attrs *)&(x)->starget_data)->period) 66 #define spi_offset(x) (((struct spi_transport_attrs *)&(x)->starget_data)->offset) 67 #define spi_width(x) (((struct spi_transport_attrs *)&(x)->starget_data)->width) 68 #define spi_iu(x) (((struct spi_transport_attrs *)&(x)->starget_data)->iu) 69 #define spi_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->dt) 70 #define spi_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->qas) 71 #define spi_wr_flow(x) (((struct spi_transport_attrs *)&(x)->starget_data)->wr_flow) 72 #define spi_rd_strm(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rd_strm) 73 #define spi_rti(x) (((struct spi_transport_attrs *)&(x)->starget_data)->rti) 74 #define spi_pcomp_en(x) (((struct spi_transport_attrs *)&(x)->starget_data)->pcomp_en) 75 #define spi_initial_dv(x) (((struct spi_transport_attrs *)&(x)->starget_data)->initial_dv) 76 77 #define spi_support_sync(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_sync) 78 #define spi_support_wide(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_wide) 79 #define spi_support_dt(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt) 80 #define spi_support_dt_only(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_dt_only) 81 #define spi_support_ius(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_ius) 82 #define spi_support_qas(x) (((struct spi_transport_attrs *)&(x)->starget_data)->support_qas) 83 84 #define spi_flags(x) (((struct spi_transport_attrs *)&(x)->starget_data)->flags) 85 #define spi_signalling(h) (((struct spi_host_attrs *)(h)->shost_data)->signalling) 86 87 88 89 /* The functions by which the transport class and the driver communicate */ 90 struct spi_function_template { 91 void (*get_period)(struct scsi_target *); 92 void (*set_period)(struct scsi_target *, int); 93 void (*get_offset)(struct scsi_target *); 94 void (*set_offset)(struct scsi_target *, int); 95 void (*get_width)(struct scsi_target *); 96 void (*set_width)(struct scsi_target *, int); 97 void (*get_iu)(struct scsi_target *); 98 void (*set_iu)(struct scsi_target *, int); 99 void (*get_dt)(struct scsi_target *); 100 void (*set_dt)(struct scsi_target *, int); 101 void (*get_qas)(struct scsi_target *); 102 void (*set_qas)(struct scsi_target *, int); 103 void (*get_wr_flow)(struct scsi_target *); 104 void (*set_wr_flow)(struct scsi_target *, int); 105 void (*get_rd_strm)(struct scsi_target *); 106 void (*set_rd_strm)(struct scsi_target *, int); 107 void (*get_rti)(struct scsi_target *); 108 void (*set_rti)(struct scsi_target *, int); 109 void (*get_pcomp_en)(struct scsi_target *); 110 void (*set_pcomp_en)(struct scsi_target *, int); 111 void (*get_signalling)(struct Scsi_Host *); 112 void (*set_signalling)(struct Scsi_Host *, enum spi_signal_type); 113 /* The driver sets these to tell the transport class it 114 * wants the attributes displayed in sysfs. If the show_ flag 115 * is not set, the attribute will be private to the transport 116 * class */ 117 unsigned long show_period:1; 118 unsigned long show_offset:1; 119 unsigned long show_width:1; 120 unsigned long show_iu:1; 121 unsigned long show_dt:1; 122 unsigned long show_qas:1; 123 unsigned long show_wr_flow:1; 124 unsigned long show_rd_strm:1; 125 unsigned long show_rti:1; 126 unsigned long show_pcomp_en:1; 127 }; 128 129 struct scsi_transport_template *spi_attach_transport(struct spi_function_template *); 130 void spi_release_transport(struct scsi_transport_template *); 131 void spi_schedule_dv_device(struct scsi_device *); 132 void spi_dv_device(struct scsi_device *); 133 void spi_display_xfer_agreement(struct scsi_target *); 134 135 #endif /* SCSI_TRANSPORT_SPI_H */ 136