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freebsd/sys/dev/mly/mlyvar.h

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/*-
* Copyright (c) 2000, 2001 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.
*
* $FreeBSD$
*/
/********************************************************************************
********************************************************************************
Driver Parameter Definitions
********************************************************************************
********************************************************************************/
/*
* The firmware interface allows for a 16-bit command identifier. A lookup
* table this size (256k) would be too expensive, so we cap ourselves at a
* reasonable limit.
*/
#define MLY_MAX_COMMANDS 256 /* max commands per controller */
/*
* The firmware interface allows for a 16-bit s/g list length. We limit
* ourselves to a reasonable maximum and ensure alignment.
*/
#define MLY_MAX_SGENTRIES 64 /* max S/G entries, limit 65535 */
/*
* The interval at which we poke the controller for status updates (in seconds).
*/
#define MLY_PERIODIC_INTERVAL 1
/********************************************************************************
********************************************************************************
Cross-version Compatibility
********************************************************************************
********************************************************************************/
# include <sys/taskqueue.h>
#ifndef INTR_ENTROPY
# define INTR_ENTROPY 0
#endif
/********************************************************************************
********************************************************************************
Driver Variable Definitions
********************************************************************************
********************************************************************************/
/*
* Debugging levels:
* 0 - quiet, only emit warnings
* 1 - noisy, emit major function points and things done
* 2 - extremely noisy, emit trace items in loops, etc.
*/
#ifdef MLY_DEBUG
# define debug(level, fmt, args...) do { if (level <= MLY_DEBUG) printf("%s: " fmt "\n", __func__ , ##args); } while(0)
# define debug_called(level) do { if (level <= MLY_DEBUG) printf("%s: called\n", __func__); } while(0)
# define debug_struct(s) printf(" SIZE %s: %d\n", #s, sizeof(struct s))
# define debug_union(s) printf(" SIZE %s: %d\n", #s, sizeof(union s))
# define debug_field(s, f) printf(" OFFSET %s.%s: %d\n", #s, #f, ((int)&(((struct s *)0)->f)))
extern void mly_printstate0(void);
extern struct mly_softc *mly_softc0;
#else
# define debug(level, fmt, args...)
# define debug_called(level)
# define debug_struct(s)
#endif
#define mly_printf(sc, fmt, args...) device_printf(sc->mly_dev, fmt , ##args)
/*
* Per-device structure, used to save persistent state on devices.
*
* Note that this isn't really Bus/Target/Lun since we don't support
* lun != 0 at this time.
*/
struct mly_btl {
int mb_flags;
#define MLY_BTL_PHYSICAL (1<<0) /* physical device */
#define MLY_BTL_LOGICAL (1<<1) /* logical device */
#define MLY_BTL_PROTECTED (1<<2) /* device is protected - I/O not allowed */
#define MLY_BTL_RESCAN (1<<3) /* device needs to be rescanned */
char mb_name[16]; /* peripheral attached to this device */
int mb_state; /* see 8.1 */
int mb_type; /* see 8.2 */
/* physical devices only */
int mb_speed; /* interface transfer rate */
int mb_width; /* interface width */
};
/*
* Per-command control structure.
*/
struct mly_command {
TAILQ_ENTRY(mly_command) mc_link; /* list linkage */
struct mly_softc *mc_sc; /* controller that owns us */
u_int16_t mc_slot; /* command slot we occupy */
int mc_flags;
#define MLY_CMD_BUSY (1<<0) /* command is being run, or ready to run, or not completed */
#define MLY_CMD_COMPLETE (1<<1) /* command has been completed */
#define MLY_CMD_MAPPED (1<<3) /* command has had its data mapped */
#define MLY_CMD_DATAIN (1<<4) /* data moves controller->system */
#define MLY_CMD_DATAOUT (1<<5) /* data moves system->controller */
u_int16_t mc_status; /* command completion status */
u_int8_t mc_sense; /* sense data length */
int32_t mc_resid; /* I/O residual count */
union mly_command_packet *mc_packet; /* our controller command */
u_int64_t mc_packetphys; /* physical address of the mapped packet */
void *mc_data; /* data buffer */
size_t mc_length; /* data length */
bus_dmamap_t mc_datamap; /* DMA map for data */
void (* mc_complete)(struct mly_command *mc); /* completion handler */
void *mc_private; /* caller-private data */
int mc_timestamp;
};
/*
* Command slot regulation.
*
* We can't use slot 0 due to the memory mailbox implementation.
*/
#define MLY_SLOT_START 1
#define MLY_SLOT_MAX (MLY_SLOT_START + MLY_MAX_COMMANDS)
/*
* Per-controller structure.
*/
struct mly_softc {
/* bus connections */
device_t mly_dev;
struct cdev *mly_dev_t;
struct resource *mly_regs_resource; /* register interface window */
int mly_regs_rid; /* resource ID */
bus_space_handle_t mly_bhandle; /* bus space handle */
bus_space_tag_t mly_btag; /* bus space tag */
bus_dma_tag_t mly_parent_dmat; /* parent DMA tag */
bus_dma_tag_t mly_buffer_dmat; /* data buffer/command DMA tag */
struct resource *mly_irq; /* interrupt */
int mly_irq_rid;
void *mly_intr; /* interrupt handle */
/* scatter/gather lists and their controller-visible mappings */
struct mly_sg_entry *mly_sg_table; /* s/g lists */
u_int32_t mly_sg_busaddr; /* s/g table base address in bus space */
bus_dma_tag_t mly_sg_dmat; /* s/g buffer DMA tag */
bus_dmamap_t mly_sg_dmamap; /* map for s/g buffers */
/* controller hardware interface */
int mly_hwif;
#define MLY_HWIF_I960RX 0
#define MLY_HWIF_STRONGARM 1
u_int8_t mly_doorbell_true; /* xor map to make hardware doorbell 'true' bits into 1s */
u_int8_t mly_command_mailbox; /* register offsets */
u_int8_t mly_status_mailbox;
u_int8_t mly_idbr;
u_int8_t mly_odbr;
u_int8_t mly_error_status;
u_int8_t mly_interrupt_status;
u_int8_t mly_interrupt_mask;
struct mly_mmbox *mly_mmbox; /* kernel-space address of memory mailbox */
u_int64_t mly_mmbox_busaddr; /* bus-space address of memory mailbox */
bus_dma_tag_t mly_mmbox_dmat; /* memory mailbox DMA tag */
bus_dmamap_t mly_mmbox_dmamap; /* memory mailbox DMA map */
u_int32_t mly_mmbox_command_index; /* next index to use */
u_int32_t mly_mmbox_status_index; /* index we next expect status at */
/* controller features, limits and status */
int mly_state;
#define MLY_STATE_OPEN (1<<1)
#define MLY_STATE_INTERRUPTS_ON (1<<2)
#define MLY_STATE_MMBOX_ACTIVE (1<<3)
#define MLY_STATE_CAM_FROZEN (1<<4)
struct mly_ioctl_getcontrollerinfo *mly_controllerinfo;
struct mly_param_controller *mly_controllerparam;
struct mly_btl mly_btl[MLY_MAX_CHANNELS][MLY_MAX_TARGETS];
/* command management */
struct mly_command mly_command[MLY_MAX_COMMANDS]; /* commands */
union mly_command_packet *mly_packet; /* command packets */
bus_dma_tag_t mly_packet_dmat; /* packet DMA tag */
bus_dmamap_t mly_packetmap; /* packet DMA map */
u_int64_t mly_packetphys; /* packet array base address */
TAILQ_HEAD(,mly_command) mly_free; /* commands available for reuse */
TAILQ_HEAD(,mly_command) mly_busy;
TAILQ_HEAD(,mly_command) mly_complete; /* commands which have been returned by the controller */
struct mly_qstat mly_qstat[MLYQ_COUNT]; /* queue statistics */
/* health monitoring */
u_int32_t mly_event_change; /* event status change indicator */
u_int32_t mly_event_counter; /* next event for which we anticpiate status */
u_int32_t mly_event_waiting; /* next event the controller will post status for */
struct callout_handle mly_periodic; /* periodic event handling */
/* CAM connection */
struct cam_devq *mly_cam_devq; /* CAM device queue */
struct cam_sim *mly_cam_sim[MLY_MAX_CHANNELS]; /* CAM SIMs */
struct cam_path *mly_cam_path; /* rescan path */
int mly_cam_channels; /* total channel count */
/* command-completion task */
struct task mly_task_complete; /* deferred-completion task */
int mly_qfrzn_cnt; /* Track simq freezes */
};
/*
* Register access helpers.
*/
#define MLY_SET_REG(sc, reg, val) bus_space_write_1(sc->mly_btag, sc->mly_bhandle, reg, val)
#define MLY_GET_REG(sc, reg) bus_space_read_1 (sc->mly_btag, sc->mly_bhandle, reg)
#define MLY_GET_REG2(sc, reg) bus_space_read_2 (sc->mly_btag, sc->mly_bhandle, reg)
#define MLY_GET_REG4(sc, reg) bus_space_read_4 (sc->mly_btag, sc->mly_bhandle, reg)
#define MLY_SET_MBOX(sc, mbox, ptr) \
do { \
bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox, *((u_int32_t *)ptr)); \
bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 4, *((u_int32_t *)ptr + 1)); \
bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 8, *((u_int32_t *)ptr + 2)); \
bus_space_write_4(sc->mly_btag, sc->mly_bhandle, mbox + 12, *((u_int32_t *)ptr + 3)); \
} while(0);
#define MLY_GET_MBOX(sc, mbox, ptr) \
do { \
*((u_int32_t *)ptr) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox); \
*((u_int32_t *)ptr + 1) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 4); \
*((u_int32_t *)ptr + 2) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 8); \
*((u_int32_t *)ptr + 3) = bus_space_read_4(sc->mly_btag, sc->mly_bhandle, mbox + 12); \
} while(0);
#define MLY_IDBR_TRUE(sc, mask) \
((((MLY_GET_REG((sc), (sc)->mly_idbr)) ^ (sc)->mly_doorbell_true) & (mask)) == (mask))
#define MLY_ODBR_TRUE(sc, mask) \
((MLY_GET_REG((sc), (sc)->mly_odbr) & (mask)) == (mask))
#define MLY_ERROR_VALID(sc) \
((((MLY_GET_REG((sc), (sc)->mly_error_status)) ^ (sc)->mly_doorbell_true) & (MLY_MSG_EMPTY)) == 0)
#define MLY_MASK_INTERRUPTS(sc) \
do { \
MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_DISABLE); \
sc->mly_state &= ~MLY_STATE_INTERRUPTS_ON; \
} while(0);
#define MLY_UNMASK_INTERRUPTS(sc) \
do { \
MLY_SET_REG((sc), (sc)->mly_interrupt_mask, MLY_INTERRUPT_MASK_ENABLE); \
sc->mly_state |= MLY_STATE_INTERRUPTS_ON; \
} while(0);
/*
* Bus/target/logical ID-related macros.
*/
#define MLY_LOGDEV_ID(sc, bus, target) (((bus) - (sc)->mly_controllerinfo->physical_channels_present) * \
MLY_MAX_TARGETS + (target))
#define MLY_LOGDEV_BUS(sc, logdev) (((logdev) / MLY_MAX_TARGETS) + \
(sc)->mly_controllerinfo->physical_channels_present)
#define MLY_LOGDEV_TARGET(sc, logdev) ((logdev) % MLY_MAX_TARGETS)
#define MLY_BUS_IS_VIRTUAL(sc, bus) ((bus) >= (sc)->mly_controllerinfo->physical_channels_present)
#define MLY_BUS_IS_VALID(sc, bus) (((bus) < (sc)->mly_cam_channels) && ((sc)->mly_cam_sim[(bus)] != NULL))
/********************************************************************************
* Queue primitives
*/
#define MLYQ_ADD(sc, qname) \
do { \
struct mly_qstat *qs = &(sc)->mly_qstat[qname]; \
\
qs->q_length++; \
if (qs->q_length > qs->q_max) \
qs->q_max = qs->q_length; \
} while(0)
#define MLYQ_REMOVE(sc, qname) (sc)->mly_qstat[qname].q_length--
#define MLYQ_INIT(sc, qname) \
do { \
sc->mly_qstat[qname].q_length = 0; \
sc->mly_qstat[qname].q_max = 0; \
} while(0)
#define MLYQ_COMMAND_QUEUE(name, index) \
static __inline void \
mly_initq_ ## name (struct mly_softc *sc) \
{ \
TAILQ_INIT(&sc->mly_ ## name); \
MLYQ_INIT(sc, index); \
} \
static __inline void \
mly_enqueue_ ## name (struct mly_command *mc) \
{ \
int s; \
\
s = splcam(); \
TAILQ_INSERT_TAIL(&mc->mc_sc->mly_ ## name, mc, mc_link); \
MLYQ_ADD(mc->mc_sc, index); \
splx(s); \
} \
static __inline void \
mly_requeue_ ## name (struct mly_command *mc) \
{ \
int s; \
\
s = splcam(); \
TAILQ_INSERT_HEAD(&mc->mc_sc->mly_ ## name, mc, mc_link); \
MLYQ_ADD(mc->mc_sc, index); \
splx(s); \
} \
static __inline struct mly_command * \
mly_dequeue_ ## name (struct mly_softc *sc) \
{ \
struct mly_command *mc; \
int s; \
\
s = splcam(); \
if ((mc = TAILQ_FIRST(&sc->mly_ ## name)) != NULL) { \
TAILQ_REMOVE(&sc->mly_ ## name, mc, mc_link); \
MLYQ_REMOVE(sc, index); \
} \
splx(s); \
return(mc); \
} \
static __inline void \
mly_remove_ ## name (struct mly_command *mc) \
{ \
int s; \
\
s = splcam(); \
TAILQ_REMOVE(&mc->mc_sc->mly_ ## name, mc, mc_link); \
MLYQ_REMOVE(mc->mc_sc, index); \
splx(s); \
} \
struct hack
MLYQ_COMMAND_QUEUE(free, MLYQ_FREE);
MLYQ_COMMAND_QUEUE(busy, MLYQ_BUSY);
MLYQ_COMMAND_QUEUE(complete, MLYQ_COMPLETE);
/********************************************************************************
* space-fill a character string
*/
static __inline void
padstr(char *targ, char *src, int len)
{
while (len-- > 0) {
if (*src != 0) {
*targ++ = *src++;
} else {
*targ++ = ' ';
}
}
}
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