sys/dev/disk/aic7xxx/aic7xxx_osm.h

   1 /*
   2  * FreeBSD platform specific driver option settings, data structures,
   3  * function declarations and includes.
   4  *
   5  * Copyright (c) 1994-2001 Justin T. Gibbs.
   6  * All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions, and the following disclaimer,
  13  *    without modification.
  14  * 2. The name of the author may not be used to endorse or promote products
  15  *    derived from this software without specific prior written permission.
  16  *
  17  * Alternatively, this software may be distributed under the terms of the
  18  * GNU Public License ("GPL").
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
  24  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  * $Id: //depot/aic7xxx/freebsd/dev/aic7xxx/aic7xxx_osm.h#18 $
  33  *
  34  * $FreeBSD: src/sys/dev/aic7xxx/aic7xxx_osm.h,v 1.30 2005/12/05 11:58:32 ru Exp $
  35  * $DragonFly: src/sys/dev/disk/aic7xxx/aic7xxx_osm.h,v 1.15 2008/04/06 19:03:18 pavalos Exp $
  36  */
  37
  38 #ifndef _AIC7XXX_FREEBSD_H_
  39 #define _AIC7XXX_FREEBSD_H_
  40
  41 #include <opt_aic7xxx.h>        /* for config options */
  42
  43 #include <sys/param.h>
  44 #include <sys/systm.h>
  45 #include <sys/bus.h>            /* For device_t */
  46 #if defined(__FreeBSD__) && __FreeBSD_version >= 500000
  47 #include <sys/endian.h>
  48 #endif
  49 #include <sys/eventhandler.h>
  50 #include <sys/kernel.h>
  51 #include <sys/malloc.h>
  52 #include <sys/queue.h>
  53 #include <sys/rman.h>
  54 #include <sys/thread2.h>
  55
  56 #if defined(__DragonFly__) || __FreeBSD_version < 500000
  57 #include <use_pci.h>
  58 #else
  59 #define NPCI 1
  60 #endif
  61
  62 #if NPCI > 0
  63 #define AIC_PCI_CONFIG 1
  64 #endif
  65 #include <machine/endian.h>
  66 #include <machine/clock.h>
  67
  68 #if NPCI > 0
  69 #include <bus/pci/pcireg.h>
  70 #include <bus/pci/pcivar.h>
  71 #endif
  72
  73 #include <bus/cam/cam.h>
  74 #include <bus/cam/cam_ccb.h>
  75 #include <bus/cam/cam_debug.h>
  76 #include <bus/cam/cam_sim.h>
  77 #include <bus/cam/cam_xpt_sim.h>
  78
  79 #include <bus/cam/scsi/scsi_all.h>
  80 #include <bus/cam/scsi/scsi_message.h>
  81
  82 /*************************** Attachment Bookkeeping ***************************/
  83 extern devclass_t ahc_devclass;
  84
  85 /****************************** Platform Macros *******************************/
  86 #define SIM_IS_SCSIBUS_B(ahc, sim)      \
  87         ((sim) == ahc->platform_data->sim_b)
  88 #define SIM_CHANNEL(ahc, sim)   \
  89         (((sim) == ahc->platform_data->sim_b) ? 'B' : 'A')
  90 #define SIM_SCSI_ID(ahc, sim)   \
  91         (((sim) == ahc->platform_data->sim_b) ? ahc->our_id_b : ahc->our_id)
  92 #define SIM_PATH(ahc, sim)      \
  93         (((sim) == ahc->platform_data->sim_b) ? ahc->platform_data->path_b \
  94                                               : ahc->platform_data->path)
  95 #define BUILD_SCSIID(ahc, sim, target_id, our_id) \
  96         ((((target_id) << TID_SHIFT) & TID) | (our_id) \
  97         | (SIM_IS_SCSIBUS_B(ahc, sim) ? TWIN_CHNLB : 0))
  98
  99 #define SCB_GET_SIM(ahc, scb) \
 100         (SCB_GET_CHANNEL(ahc, scb) == 'A' ? (ahc)->platform_data->sim \
 101                                           : (ahc)->platform_data->sim_b)
 102
 103 #ifndef offsetof
 104 #define offsetof(type, member)  ((size_t)(&((type *)0)->member))
 105 #endif
 106
 107 /************************ Tunable Driver Parameters  **************************/
 108 /*
 109  * The number of dma segments supported.  The sequencer can handle any number
 110  * of physically contiguous S/G entrys.  To reduce the driver's memory
 111  * consumption, we limit the number supported to be sufficient to handle
 112  * the largest mapping supported by the kernel, MAXPHYS.  Assuming the
 113  * transfer is as fragmented as possible and unaligned, this turns out to
 114  * be the number of paged sized transfers in MAXPHYS plus an extra element
 115  * to handle any unaligned residual.  The sequencer fetches SG elements
 116  * in cacheline sized chucks, so make the number per-transaction an even
 117  * multiple of 16 which should align us on even the largest of cacheline
 118  * boundaries.
 119  */
 120 #define AHC_NSEG (roundup(btoc(MAXPHYS) + 1, 16))
 121
 122 /* This driver supports target mode */
 123 #define AHC_TARGET_MODE 1
 124
 125 /***************************** Core Includes **********************************/
 126 #ifdef AHC_REG_PRETTY_PRINT
 127 #define AIC_DEBUG_REGISTERS 1
 128 #else
 129 #define AIC_DEBUG_REGISTERS 0
 130 #endif
 131 #define AIC_CORE_INCLUDE "aic7xxx.h"
 132 #define AIC_LIB_PREFIX ahc
 133 #define AIC_CONST_PREFIX AHC
 134 #include "aic_osm_lib.h"
 135
 136 /************************** Softc/SCB Platform Data ***************************/
 137 struct ahc_platform_data {
 138         /*
 139          * Hooks into the XPT.
 140          */
 141         struct  cam_sim         *sim;
 142         struct  cam_sim         *sim_b;
 143         struct  cam_path        *path;
 144         struct  cam_path        *path_b;
 145
 146         int                      regs_res_type;
 147         int                      regs_res_id;
 148         int                      irq_res_type;
 149         struct resource         *regs;
 150         struct resource         *irq;
 151         void                    *ih;
 152         eventhandler_tag         eh;
 153         struct thread           *recovery_thread;
 154         struct lock              lock;
 155 };
 156
 157 struct scb_platform_data {
 158 };
 159
 160 /*************************** Device Access ************************************/
 161 #define ahc_inb(ahc, port)                              \
 162         bus_space_read_1((ahc)->tag, (ahc)->bsh, port)
 163
 164 #define ahc_outb(ahc, port, value)                      \
 165         bus_space_write_1((ahc)->tag, (ahc)->bsh, port, value)
 166
 167 #define ahc_outsb(ahc, port, valp, count)               \
 168         bus_space_write_multi_1((ahc)->tag, (ahc)->bsh, port, valp, count)
 169
 170 #define ahc_insb(ahc, port, valp, count)                \
 171         bus_space_read_multi_1((ahc)->tag, (ahc)->bsh, port, valp, count)
 172
 173 static __inline void ahc_flush_device_writes(struct ahc_softc *);
 174
 175 static __inline void
 176 ahc_flush_device_writes(struct ahc_softc *ahc)
 177 {
 178         /* XXX Is this sufficient for all architectures??? */
 179         ahc_inb(ahc, INTSTAT);
 180 }
 181
 182 /**************************** Locking Primitives ******************************/
 183 /* Lock protecting internal data structures */
 184 static __inline void ahc_lockinit(struct ahc_softc *);
 185 static __inline void ahc_lock(struct ahc_softc *);
 186 static __inline void ahc_unlock(struct ahc_softc *);
 187
 188 static __inline void
 189 ahc_lockinit(struct ahc_softc *ahc)
 190 {
 191         lockinit(&ahc->platform_data->lock, "ahc_lock", 0, LK_CANRECURSE);
 192 }
 193
 194 static __inline void
 195 ahc_lock(struct ahc_softc *ahc)
 196 {
 197         lockmgr(&ahc->platform_data->lock, LK_EXCLUSIVE);
 198 }
 199
 200 static __inline void
 201 ahc_unlock(struct ahc_softc *ahc)
 202 {
 203         lockmgr(&ahc->platform_data->lock, LK_RELEASE);
 204 }
 205
 206 /************************* Initialization/Teardown ****************************/
 207 int       ahc_platform_alloc(struct ahc_softc *ahc, void *platform_arg);
 208 void      ahc_platform_free(struct ahc_softc *ahc);
 209 int       ahc_map_int(struct ahc_softc *ahc);
 210 int       ahc_attach(struct ahc_softc *);
 211 int       ahc_softc_comp(struct ahc_softc *lahc, struct ahc_softc *rahc);
 212 int       ahc_detach(device_t);
 213
 214 /********************************** PCI ***************************************/
 215 #ifdef AIC_PCI_CONFIG
 216 int ahc_pci_map_registers(struct ahc_softc *ahc);
 217 #define ahc_pci_map_int ahc_map_int
 218 #endif /*AIC_PCI_CONFIG*/
 219
 220 /******************************** VL/EISA *************************************/
 221 int aic7770_map_registers(struct ahc_softc *ahc, u_int port);
 222 static __inline int aic7770_map_int(struct ahc_softc *, int);
 223
 224 static __inline int
 225 aic7770_map_int(struct ahc_softc *ahc, int irq)
 226 {
 227         /*
 228          * The IRQ is unused in the FreeBSD
 229          * implementation since the EISA and
 230          * ISA attachments register the IRQ
 231          * with newbus before the core is called.
 232          */
 233         return ahc_map_int(ahc);
 234 }
 235
 236 /********************************* Debug **************************************/
 237 static __inline void    ahc_print_path(struct ahc_softc *, struct scb *);
 238 static __inline void    ahc_platform_dump_card_state(struct ahc_softc *ahc);
 239
 240 static __inline void
 241 ahc_print_path(struct ahc_softc *ahc, struct scb *scb)
 242 {
 243         xpt_print_path(scb->io_ctx->ccb_h.path);
 244 }
 245
 246 static __inline void
 247 ahc_platform_dump_card_state(struct ahc_softc *ahc)
 248 {
 249         /* Nothing to do here for FreeBSD */
 250 }
 251 /**************************** Transfer Settings *******************************/
 252 void      ahc_notify_xfer_settings_change(struct ahc_softc *,
 253                                           struct ahc_devinfo *);
 254 void      ahc_platform_set_tags(struct ahc_softc *, struct ahc_devinfo *,
 255                                 int /*enable*/);
 256
 257 /****************************** Interrupts ************************************/
 258 void                    ahc_platform_intr(void *);
 259 static __inline void    ahc_platform_flushwork(struct ahc_softc *ahc);
 260 static __inline void
 261 ahc_platform_flushwork(struct ahc_softc *ahc)
 262 {
 263 }
 264
 265 /************************ Misc Function Declarations **************************/
 266 void      ahc_done(struct ahc_softc *ahc, struct scb *scb);
 267 void      ahc_send_async(struct ahc_softc *, char /*channel*/,
 268                          u_int /*target*/, u_int /*lun*/, ac_code, void *arg);
 269 #endif  /* _AIC7XXX_FREEBSD_H_ */