249 lines
8.8 KiB
C
249 lines
8.8 KiB
C
/*-
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* Copyright (c) 1999 Michael Smith
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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/*
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* Debugging levels:
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* 0 - quiet, only emit warnings
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* 1 - noisy, emit major function points and things done
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* 2 - extremely noisy, emit trace items in loops, etc.
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*/
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#ifdef MLX_DEBUG
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#define debug(level, fmt, args...) do { if (level <= MLX_DEBUG) printf("%s: " fmt "\n", __func__ , ##args); } while(0)
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#define debug_called(level) do { if (level <= MLX_DEBUG) printf(__func__ ": called\n"); } while(0)
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#else
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#define debug(level, fmt, args...)
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#define debug_called(level)
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#endif
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/*
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* Regardless of the actual capacity of the controller, we will allocate space
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* for 64 s/g entries. Typically controllers support 17 or 33 entries (64k or
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* 128k maximum transfer assuming 4k page size and non-optimal alignment), but
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* making that fit cleanly without crossing page boundaries requires rounding up
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* to the next power of two.
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*/
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#define MLX_NSEG 64
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#define MLX_NSLOTS 256 /* max number of command slots */
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#define MLX_MAXDRIVES 32 /* max number of system drives */
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/*
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* Structure describing a System Drive as attached to the controller.
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*/
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struct mlx_sysdrive
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{
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/* from MLX_CMD_ENQSYSDRIVE */
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u_int32_t ms_size;
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int ms_state;
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int ms_raidlevel;
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/* synthetic geometry */
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int ms_cylinders;
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int ms_heads;
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int ms_sectors;
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/* handle for attached driver */
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device_t ms_disk;
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};
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/*
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* Per-command control structure.
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*/
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struct mlx_command
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{
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TAILQ_ENTRY(mlx_command) mc_link; /* list linkage */
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struct mlx_softc *mc_sc; /* controller that owns us */
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u_int8_t mc_slot; /* command slot we occupy */
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u_int16_t mc_status; /* command completion status */
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time_t mc_timeout; /* when this command expires */
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u_int8_t mc_mailbox[16]; /* command mailbox */
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u_int32_t mc_sgphys; /* physical address of s/g array in controller space */
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int mc_nsgent; /* number of entries in s/g map */
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int mc_flags;
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#define MLX_CMD_DATAIN (1<<0)
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#define MLX_CMD_DATAOUT (1<<1)
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#define MLX_CMD_PRIORITY (1<<2) /* high-priority command */
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void *mc_data; /* data buffer */
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size_t mc_length;
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bus_dmamap_t mc_dmamap; /* DMA map for data */
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u_int32_t mc_dataphys; /* data buffer base address controller space */
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void (* mc_complete)(struct mlx_command *mc); /* completion handler */
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void *mc_private; /* submitter-private data or wait channel */
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};
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/*
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* Per-controller structure.
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*/
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struct mlx_softc
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{
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/* bus connections */
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device_t mlx_dev;
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dev_t mlx_dev_t;
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struct resource *mlx_mem; /* mailbox interface window */
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int mlx_mem_rid;
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int mlx_mem_type;
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bus_space_handle_t mlx_bhandle; /* bus space handle */
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bus_space_tag_t mlx_btag; /* bus space tag */
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bus_dma_tag_t mlx_parent_dmat;/* parent DMA tag */
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bus_dma_tag_t mlx_buffer_dmat;/* data buffer DMA tag */
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struct resource *mlx_irq; /* interrupt */
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void *mlx_intr; /* interrupt handle */
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/* scatter/gather lists and their controller-visible mappings */
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struct mlx_sgentry *mlx_sgtable; /* s/g lists */
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u_int32_t mlx_sgbusaddr; /* s/g table base address in bus space */
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bus_dma_tag_t mlx_sg_dmat; /* s/g buffer DMA tag */
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bus_dmamap_t mlx_sg_dmamap; /* map for s/g buffers */
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/* controller limits and features */
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struct mlx_enquiry2 *mlx_enq2;
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int mlx_feature; /* controller features/quirks */
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#define MLX_FEAT_PAUSEWORKS (1<<0) /* channel pause works as expected */
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/* controller queues and arrays */
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TAILQ_HEAD(, mlx_command) mlx_freecmds; /* command structures available for reuse */
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TAILQ_HEAD(, mlx_command) mlx_work; /* active commands */
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struct mlx_command *mlx_busycmd[MLX_NSLOTS]; /* busy commands */
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int mlx_busycmds; /* count of busy commands */
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struct mlx_sysdrive mlx_sysdrive[MLX_MAXDRIVES]; /* system drives */
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mlx_bioq mlx_bioq; /* outstanding I/O operations */
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int mlx_waitbufs; /* number of bufs awaiting commands */
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/* controller status */
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int mlx_geom;
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#define MLX_GEOM_128_32 0 /* geoemetry translation modes */
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#define MLX_GEOM_256_63 1
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int mlx_state;
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#define MLX_STATE_INTEN (1<<0) /* interrupts have been enabled */
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#define MLX_STATE_SHUTDOWN (1<<1) /* controller is shut down */
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#define MLX_STATE_OPEN (1<<2) /* control device is open */
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#define MLX_STATE_SUSPEND (1<<3) /* controller is suspended */
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struct callout_handle mlx_timeout; /* periodic status monitor */
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time_t mlx_lastpoll; /* last time_second we polled for status */
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u_int16_t mlx_lastevent; /* sequence number of the last event we recorded */
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int mlx_currevent; /* sequence number last time we looked */
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int mlx_background; /* if != 0 rebuild or check is in progress */
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#define MLX_BACKGROUND_CHECK 1 /* we started a check */
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#define MLX_BACKGROUND_REBUILD 2 /* we started a rebuild */
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#define MLX_BACKGROUND_SPONTANEOUS 3 /* it just happened somehow */
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struct mlx_rebuild_status mlx_rebuildstat; /* last rebuild status */
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struct mlx_pause mlx_pause; /* pending pause operation details */
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int mlx_locks; /* reentrancy avoidance */
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int mlx_flags;
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#define MLX_SPINUP_REPORTED (1<<0) /* "spinning up drives" message displayed */
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#define MLX_EVENTLOG_BUSY (1<<1) /* currently reading event log */
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/* interface-specific accessor functions */
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int mlx_iftype; /* interface protocol */
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#define MLX_IFTYPE_2 2
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#define MLX_IFTYPE_3 3
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#define MLX_IFTYPE_4 4
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#define MLX_IFTYPE_5 5
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int (* mlx_tryqueue)(struct mlx_softc *sc, struct mlx_command *mc);
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int (* mlx_findcomplete)(struct mlx_softc *sc, u_int8_t *slot, u_int16_t *status);
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void (* mlx_intaction)(struct mlx_softc *sc, int action);
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int (* mlx_fw_handshake)(struct mlx_softc *sc, int *error, int *param1, int *param2);
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#define MLX_INTACTION_DISABLE 0
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#define MLX_INTACTION_ENABLE 1
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};
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/*
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* Simple (stupid) locks.
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*
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* Note that these are designed to avoid reentrancy, not concurrency, and will
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* need to be replaced with something better.
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*/
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#define MLX_LOCK_COMPLETING (1<<0)
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#define MLX_LOCK_STARTING (1<<1)
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static __inline int
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mlx_lock_tas(struct mlx_softc *sc, int lock)
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{
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if ((sc)->mlx_locks & (lock))
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return(1);
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atomic_set_int(&sc->mlx_locks, lock);
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return(0);
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}
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static __inline void
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mlx_lock_clr(struct mlx_softc *sc, int lock)
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{
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atomic_clear_int(&sc->mlx_locks, lock);
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}
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/*
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* Interface between bus connections and driver core.
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*/
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extern void mlx_free(struct mlx_softc *sc);
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extern int mlx_attach(struct mlx_softc *sc);
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extern void mlx_startup(struct mlx_softc *sc);
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extern void mlx_intr(void *data);
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extern int mlx_detach(device_t dev);
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extern int mlx_shutdown(device_t dev);
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extern int mlx_suspend(device_t dev);
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extern int mlx_resume(device_t dev);
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extern d_open_t mlx_open;
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extern d_close_t mlx_close;
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extern d_ioctl_t mlx_ioctl;
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extern devclass_t mlx_devclass;
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extern devclass_t mlxd_devclass;
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/*
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* Mylex System Disk driver
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*/
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struct mlxd_softc
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{
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device_t mlxd_dev;
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dev_t mlxd_dev_t;
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struct mlx_softc *mlxd_controller;
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struct mlx_sysdrive *mlxd_drive;
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struct disk mlxd_disk;
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struct devstat mlxd_stats;
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struct disklabel mlxd_label;
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int mlxd_unit;
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int mlxd_flags;
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#define MLXD_OPEN (1<<0) /* drive is open (can't shut down) */
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};
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/*
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* Interface between driver core and disk driver (should be using a bus?)
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*/
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extern int mlx_submit_buf(struct mlx_softc *sc, mlx_bio *bp);
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extern int mlx_submit_ioctl(struct mlx_softc *sc,
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struct mlx_sysdrive *drive, u_long cmd,
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caddr_t addr, int32_t flag, struct thread *td);
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extern void mlxd_intr(void *data);
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