/*- * Copyright (c) 1999,2000 Michael Smith * Copyright (c) 2000 BSDi * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $FreeBSD$ */ #if __FreeBSD_version >= 500005 # include <sys/taskqueue.h> #endif #ifdef AMR_DEBUG # define debug(level, fmt, args...) do {if (level <= AMR_DEBUG) printf("%s: " fmt "\n", __FUNCTION__ , ##args);} while(0) # define debug_called(level) do {if (level <= AMR_DEBUG) printf("%s: called\n", __FUNCTION__);} while(0) #else # define debug(level, fmt, args...) # define debug_called(level) #endif #define xdebug(fmt, args...) printf("%s: " fmt "\n", __FUNCTION__ , ##args) /* * Per-logical-drive datastructure */ struct amr_logdrive { u_int32_t al_size; int al_state; int al_properties; /* synthetic geometry */ int al_cylinders; int al_heads; int al_sectors; /* driver */ device_t al_disk; }; /* * Due to the difficulty of using the zone allocator to create a new * zone from within a module, we use our own clustering to reduce * memory wastage due to allocating lots of these small structures. * * 16k gives us a little under 200 command structures, which should * normally be plenty. We will grab more if we need them. */ #define AMR_CMD_CLUSTERSIZE (16 * 1024) /* * Per-command control structure. */ struct amr_command { TAILQ_ENTRY(amr_command) ac_link; struct amr_softc *ac_sc; u_int8_t ac_slot; int ac_status; /* command completion status */ struct amr_mailbox ac_mailbox; int ac_flags; #define AMR_CMD_DATAIN (1<<0) #define AMR_CMD_DATAOUT (1<<1) #define AMR_CMD_CCB_DATAIN (1<<2) #define AMR_CMD_CCB_DATAOUT (1<<3) #define AMR_CMD_PRIORITY (1<<4) #define AMR_CMD_MAPPED (1<<5) #define AMR_CMD_SLEEP (1<<6) #define AMR_CMD_BUSY (1<<7) struct bio *ac_bio; void *ac_data; size_t ac_length; bus_dmamap_t ac_dmamap; u_int32_t ac_dataphys; void *ac_ccb_data; size_t ac_ccb_length; bus_dmamap_t ac_ccb_dmamap; u_int32_t ac_ccb_dataphys; void (* ac_complete)(struct amr_command *ac); }; struct amr_command_cluster { TAILQ_ENTRY(amr_command_cluster) acc_link; struct amr_command acc_command[0]; }; #define AMR_CMD_CLUSTERCOUNT ((AMR_CMD_CLUSTERSIZE - sizeof(struct amr_command_cluster)) / \ sizeof(struct amr_command)) /* * Per-controller-instance data */ struct amr_softc { /* bus attachments */ device_t amr_dev; struct resource *amr_reg; /* control registers */ bus_space_handle_t amr_bhandle; bus_space_tag_t amr_btag; bus_dma_tag_t amr_parent_dmat; /* parent DMA tag */ bus_dma_tag_t amr_buffer_dmat; /* data buffer DMA tag */ struct resource *amr_irq; /* interrupt */ void *amr_intr; /* mailbox */ volatile struct amr_mailbox *amr_mailbox; volatile struct amr_mailbox64 *amr_mailbox64; u_int32_t amr_mailboxphys; bus_dma_tag_t amr_mailbox_dmat; bus_dmamap_t amr_mailbox_dmamap; /* scatter/gather lists and their controller-visible mappings */ struct amr_sgentry *amr_sgtable; /* s/g lists */ u_int32_t amr_sgbusaddr; /* s/g table base address in bus space */ bus_dma_tag_t amr_sg_dmat; /* s/g buffer DMA tag */ bus_dmamap_t amr_sg_dmamap; /* map for s/g buffers */ /* controller limits and features */ int amr_maxio; /* maximum number of I/O transactions */ int amr_maxdrives; /* max number of logical drives */ int amr_maxchan; /* count of SCSI channels */ /* connected logical drives */ struct amr_logdrive amr_drive[AMR_MAXLD]; /* controller state */ int amr_state; #define AMR_STATE_OPEN (1<<0) #define AMR_STATE_SUSPEND (1<<1) #define AMR_STATE_INTEN (1<<2) #define AMR_STATE_SHUTDOWN (1<<3) /* per-controller queues */ struct bio_queue_head amr_bioq; /* pending I/O with no commands */ TAILQ_HEAD(,amr_command) amr_ready; /* commands ready to be submitted */ struct amr_command *amr_busycmd[AMR_MAXCMD]; int amr_busyslots; TAILQ_HEAD(,amr_command) amr_completed; TAILQ_HEAD(,amr_command) amr_freecmds; TAILQ_HEAD(,amr_command_cluster) amr_cmd_clusters; /* CAM attachments for passthrough */ struct cam_sim *amr_cam_sim[AMR_MAX_CHANNELS]; TAILQ_HEAD(, ccb_hdr) amr_cam_ccbq; /* control device */ dev_t amr_dev_t; /* controller type-specific support */ int amr_type; #define AMR_TYPE_QUARTZ (1<<0) #define AMR_IS_QUARTZ(sc) ((sc)->amr_type & AMR_TYPE_QUARTZ) #define AMR_TYPE_40LD (1<<1) #define AMR_IS_40LD(sc) ((sc)->amr_type & AMR_TYPE_40LD) int (* amr_submit_command)(struct amr_softc *sc); int (* amr_get_work)(struct amr_softc *sc, struct amr_mailbox *mbsave); /* misc glue */ struct intr_config_hook amr_ich; /* wait-for-interrupts probe hook */ struct callout_handle amr_timeout; /* periodic status check */ #if __FreeBSD_version >= 500005 struct task amr_task_complete; /* deferred-completion task */ #endif }; /* * Interface between bus connections and driver core. */ extern int amr_attach(struct amr_softc *sc); extern void amr_free(struct amr_softc *sc); extern int amr_flush(struct amr_softc *sc); extern int amr_done(struct amr_softc *sc); extern void amr_startio(struct amr_softc *sc); extern devclass_t amr_devclass; /* * Command buffer allocation. */ extern struct amr_command *amr_alloccmd(struct amr_softc *sc); extern void amr_releasecmd(struct amr_command *ac); /* * CAM interface */ extern int amr_cam_attach(struct amr_softc *sc); extern void amr_cam_detach(struct amr_softc *sc); extern int amr_cam_command(struct amr_softc *sc, struct amr_command **acp); /* * MegaRAID logical disk driver */ struct amrd_softc { device_t amrd_dev; dev_t amrd_dev_t; struct amr_softc *amrd_controller; struct amr_logdrive *amrd_drive; struct disk amrd_disk; struct devstat amrd_stats; struct disklabel amrd_label; int amrd_unit; int amrd_flags; #define AMRD_OPEN (1<<0) /* drive is open (can't detach) */ }; /* * Interface between driver core and disk driver (should be using a bus?) */ extern int amr_submit_bio(struct amr_softc *sc, struct bio *bio); extern void amrd_intr(void *data); /******************************************************************************** * Enqueue/dequeue functions */ static __inline void amr_enqueue_bio(struct amr_softc *sc, struct bio *bio) { int s; s = splbio(); bioq_insert_tail(&sc->amr_bioq, bio); splx(s); } static __inline struct bio * amr_dequeue_bio(struct amr_softc *sc) { struct bio *bio; int s; s = splbio(); if ((bio = bioq_first(&sc->amr_bioq)) != NULL) bioq_remove(&sc->amr_bioq, bio); splx(s); return(bio); } static __inline void amr_enqueue_ready(struct amr_command *ac) { int s; s = splbio(); TAILQ_INSERT_TAIL(&ac->ac_sc->amr_ready, ac, ac_link); splx(s); } static __inline void amr_requeue_ready(struct amr_command *ac) { int s; s = splbio(); TAILQ_INSERT_HEAD(&ac->ac_sc->amr_ready, ac, ac_link); splx(s); } static __inline struct amr_command * amr_dequeue_ready(struct amr_softc *sc) { struct amr_command *ac; int s; s = splbio(); if ((ac = TAILQ_FIRST(&sc->amr_ready)) != NULL) TAILQ_REMOVE(&sc->amr_ready, ac, ac_link); splx(s); return(ac); } static __inline void amr_enqueue_completed(struct amr_command *ac) { int s; s = splbio(); TAILQ_INSERT_TAIL(&ac->ac_sc->amr_completed, ac, ac_link); splx(s); } static __inline struct amr_command * amr_dequeue_completed(struct amr_softc *sc) { struct amr_command *ac; int s; s = splbio(); if ((ac = TAILQ_FIRST(&sc->amr_completed)) != NULL) TAILQ_REMOVE(&sc->amr_completed, ac, ac_link); splx(s); return(ac); } static __inline void amr_enqueue_free(struct amr_command *ac) { int s; s = splbio(); TAILQ_INSERT_TAIL(&ac->ac_sc->amr_freecmds, ac, ac_link); splx(s); } static __inline struct amr_command * amr_dequeue_free(struct amr_softc *sc) { struct amr_command *ac; int s; s = splbio(); if ((ac = TAILQ_FIRST(&sc->amr_freecmds)) != NULL) TAILQ_REMOVE(&sc->amr_freecmds, ac, ac_link); splx(s); return(ac); }