164 lines
5.3 KiB
C
164 lines
5.3 KiB
C
/* $NetBSD: twevar.h,v 1.27 2008/04/28 20:23:55 martin Exp $ */
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/*-
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* Copyright (c) 2000, 2001, 2002 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Andrew Doran.
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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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _PCI_TWEVAR_H_
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#define _PCI_TWEVAR_H_
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#define TWE_MAX_QUEUECNT 129
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/* Callbacks from controller to array. */
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struct twe_callbacks {
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void (*tcb_openings)(struct device *, int);
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};
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/* Per-array drive information. */
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struct twe_drive {
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uint32_t td_size;
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uint8_t td_type;
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uint8_t td_stripe;
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struct device *td_dev;
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const struct twe_callbacks *td_callbacks;
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};
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/* Per-controller state. */
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struct twe_softc {
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struct device sc_dv;
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bus_space_tag_t sc_iot;
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bus_space_handle_t sc_ioh;
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bus_dma_tag_t sc_dmat;
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bus_dmamap_t sc_dmamap;
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void *sc_ih;
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void * sc_cmds;
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bus_addr_t sc_cmds_paddr;
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int sc_nccbs;
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struct twe_ccb *sc_ccbs;
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SIMPLEQ_HEAD(, twe_ccb) sc_ccb_queue;
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SLIST_HEAD(, twe_ccb) sc_ccb_freelist;
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int sc_flags;
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int sc_openings;
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int sc_nunits;
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struct twe_drive sc_units[TWE_MAX_UNITS];
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/* Asynchronous event notification queue for management tools. */
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#define TWE_AEN_Q_LENGTH 256
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uint16_t sc_aen_queue[TWE_AEN_Q_LENGTH];
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int sc_aen_head;
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int sc_aen_tail;
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};
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#define TWEF_OPEN 0x01 /* control device is opened */
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#define TWEF_AENQ_WAIT 0x02 /* someone waiting for AENs */
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#define TWEF_AEN 0x04 /* AEN fetch in progress */
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#define TWEF_WAIT_CCB 0x08 /* someone waiting for a CCB */
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/* Optional per-command context. */
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struct twe_context {
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void (*tx_handler)(struct twe_ccb *, int);
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void *tx_context;
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struct device *tx_dv;
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};
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/* Command control block. */
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struct twe_ccb {
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union {
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SIMPLEQ_ENTRY(twe_ccb) simpleq;
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SLIST_ENTRY(twe_ccb) slist;
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} ccb_chain;
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struct twe_cmd *ccb_cmd;
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int ccb_cmdid;
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int ccb_flags;
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void *ccb_data;
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int ccb_datasize;
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vaddr_t ccb_abuf;
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bus_dmamap_t ccb_dmamap_xfer;
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struct twe_context ccb_tx;
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};
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#define TWE_CCB_DATA_IN 0x01 /* Map describes inbound xfer */
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#define TWE_CCB_DATA_OUT 0x02 /* Map describes outbound xfer */
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#define TWE_CCB_COMPLETE 0x04 /* Command completed */
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#define TWE_CCB_ACTIVE 0x08 /* Command active */
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#define TWE_CCB_AEN 0x10 /* For AEN retrieval */
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#define TWE_CCB_ALLOCED 0x20 /* CCB allocated */
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struct twe_attach_args {
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int twea_unit;
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};
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struct twe_ccb *twe_ccb_alloc(struct twe_softc *, int);
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struct twe_ccb *twe_ccb_alloc_wait(struct twe_softc *, int);
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void twe_ccb_enqueue(struct twe_softc *sc, struct twe_ccb *ccb);
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void twe_ccb_free(struct twe_softc *sc, struct twe_ccb *);
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int twe_ccb_map(struct twe_softc *, struct twe_ccb *);
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int twe_ccb_poll(struct twe_softc *, struct twe_ccb *, int);
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int twe_ccb_submit(struct twe_softc *, struct twe_ccb *);
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void twe_ccb_unmap(struct twe_softc *, struct twe_ccb *);
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void twe_ccb_wait_handler(struct twe_ccb *, int);
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int twe_param_get(struct twe_softc *, int, int, size_t,
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void (*)(struct twe_ccb *, int), struct twe_param **);
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int twe_param_get_1(struct twe_softc *, int, int, uint8_t *);
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int twe_param_get_2(struct twe_softc *, int, int, uint16_t *);
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int twe_param_get_4(struct twe_softc *, int, int, uint32_t *);
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void twe_register_callbacks(struct twe_softc *, int,
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const struct twe_callbacks *);
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static __inline size_t twe_get_maxsegs(void) {
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size_t max_segs = ((MAXPHYS + PAGE_SIZE - 1) / PAGE_SIZE) + 1;
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#ifdef TWE_SG_SIZE
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if (TWE_SG_SIZE < max_segs)
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max_segs = TWE_SG_SIZE;
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#endif
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return max_segs;
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}
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static __inline size_t twe_get_maxxfer(size_t maxsegs) {
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return (maxsegs - 1) * PAGE_SIZE;
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}
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/*
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* Structures used to convert numeric codes to strings.
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*/
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struct twe_code_table {
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uint32_t code;
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const char *string;
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};
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extern const struct twe_code_table twe_table_status[];
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extern const struct twe_code_table twe_table_unitstate[];
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extern const struct twe_code_table twe_table_unittype[];
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extern const struct twe_code_table twe_table_stripedepth[];
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extern const struct twe_code_table twe_table_aen[];
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const char *twe_describe_code(const struct twe_code_table *, uint32_t);
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#endif /* !_PCI_TWEVAR_H_ */
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