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freebsd-dev/sys/cam/ata/ata_all.h
Alexander Motin 3631c6382f Implement media change notification for DA and CD removable media devices. 
It includes three parts:
 1) Modifications to CAM to detect media media changes and report them to
disk(9) layer. For modern SATA (and potentially UAS) devices it utilizes
Asynchronous Notification mechanism to receive events from hardware.
Active polling with TEST UNIT READY commands with 3 seconds period is used
for incapable hardware. After that both CD and DA drivers work the same way,
detecting two conditions: "NOT READY: Medium not present" after medium was
detected previously, and "UNIT ATTENTION: Not ready to ready change, medium
may have changed". First one reported to disk(9) as media removal, second
as media insert/change. To reliably receive second event new
AC_UNIT_ATTENTION async added to make UAs broadcasted to all periphs by
generic error handling code in cam_periph_error().
 2) Modifications to GEOM core to handle media remove and change events.
Media removal handled by spoiling all consumers attached to the provider.
Media change event also schedules provider retaste after spoiling to probe
new media. New flag G_CF_ORPHAN was added to consumers to reflect that
consumer is in process of destruction. It allows retaste to create new
geom instance of the same class, while previous one is still dying.
 3) Modifications to some GEOM classes: DEV -- to report media change
events to devd; VFS -- to handle spoiling same as orphan to prevent
accessing replaced media. PART class already handles spoiling alike to
orphan.

Reviewed by:	silence on geom@ and scsi@
Tested by:	avg
Sponsored by:	iXsystems, Inc. / PC-BSD
MFC after:	2 months
2012-07-29 11:51:48 +00:00

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/*-
* Copyright (c) 2009 Alexander Motin <mav@FreeBSD.org>
* 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,
* without modification, immediately at the beginning of the file.
* 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 ``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 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.
*
* $FreeBSD$
*/
#ifndef CAM_ATA_ALL_H
#define CAM_ATA_ALL_H 1
#include <sys/ata.h>
struct ccb_ataio;
struct cam_periph;
union ccb;
#define SID_AEN 0x04 /* Abuse inq_flags bit to track enabled AEN. */
#define SID_DMA 0x10 /* Abuse inq_flags bit to track enabled DMA. */
struct ata_cmd {
u_int8_t flags; /* ATA command flags */
#define CAM_ATAIO_48BIT 0x01 /* Command has 48-bit format */
#define CAM_ATAIO_FPDMA 0x02 /* FPDMA command */
#define CAM_ATAIO_CONTROL 0x04 /* Control, not a command */
#define CAM_ATAIO_NEEDRESULT 0x08 /* Request requires result. */
#define CAM_ATAIO_DMA 0x10 /* DMA command */
u_int8_t command;
u_int8_t features;
u_int8_t lba_low;
u_int8_t lba_mid;
u_int8_t lba_high;
u_int8_t device;
u_int8_t lba_low_exp;
u_int8_t lba_mid_exp;
u_int8_t lba_high_exp;
u_int8_t features_exp;
u_int8_t sector_count;
u_int8_t sector_count_exp;
u_int8_t control;
};
struct ata_res {
u_int8_t flags; /* ATA command flags */
#define CAM_ATAIO_48BIT 0x01 /* Command has 48-bit format */
u_int8_t status;
u_int8_t error;
u_int8_t lba_low;
u_int8_t lba_mid;
u_int8_t lba_high;
u_int8_t device;
u_int8_t lba_low_exp;
u_int8_t lba_mid_exp;
u_int8_t lba_high_exp;
u_int8_t sector_count;
u_int8_t sector_count_exp;
};
struct sep_identify_data {
uint8_t length; /* Enclosure descriptor length */
uint8_t subenc_id; /* Sub-enclosure identifier */
uint8_t logical_id[8]; /* Enclosure logical identifier (WWN) */
uint8_t vendor_id[8]; /* Vendor identification string */
uint8_t product_id[16]; /* Product identification string */
uint8_t product_rev[4]; /* Product revision string */
uint8_t channel_id; /* Channel identifier */
uint8_t firmware_rev[4];/* Firmware revision */
uint8_t interface_id[6];/* Interface spec ("S-E-S "/"SAF-TE")*/
uint8_t interface_rev[4];/* Interface spec revision */
uint8_t vend_spec[11]; /* Vendor specific information */
};
int ata_version(int ver);
char * ata_op_string(struct ata_cmd *cmd);
char * ata_cmd_string(struct ata_cmd *cmd, char *cmd_string, size_t len);
char * ata_res_string(struct ata_res *res, char *res_string, size_t len);
int ata_command_sbuf(struct ccb_ataio *ataio, struct sbuf *sb);
int ata_status_sbuf(struct ccb_ataio *ataio, struct sbuf *sb);
int ata_res_sbuf(struct ccb_ataio *ataio, struct sbuf *sb);
void ata_print_ident(struct ata_params *ident_data);
uint32_t ata_logical_sector_size(struct ata_params *ident_data);
uint64_t ata_physical_sector_size(struct ata_params *ident_data);
uint64_t ata_logical_sector_offset(struct ata_params *ident_data);
void ata_28bit_cmd(struct ccb_ataio *ataio, uint8_t cmd, uint8_t features,
uint32_t lba, uint8_t sector_count);
void ata_48bit_cmd(struct ccb_ataio *ataio, uint8_t cmd, uint16_t features,
uint64_t lba, uint16_t sector_count);
void ata_ncq_cmd(struct ccb_ataio *ataio, uint8_t cmd,
uint64_t lba, uint16_t sector_count);
void ata_reset_cmd(struct ccb_ataio *ataio);
void ata_pm_read_cmd(struct ccb_ataio *ataio, int reg, int port);
void ata_pm_write_cmd(struct ccb_ataio *ataio, int reg, int port, uint32_t val);
void ata_bswap(int8_t *buf, int len);
void ata_btrim(int8_t *buf, int len);
void ata_bpack(int8_t *src, int8_t *dst, int len);
int ata_max_pmode(struct ata_params *ap);
int ata_max_wmode(struct ata_params *ap);
int ata_max_umode(struct ata_params *ap);
int ata_max_mode(struct ata_params *ap, int maxmode);
char * ata_mode2string(int mode);
int ata_string2mode(char *str);
u_int ata_mode2speed(int mode);
u_int ata_revision2speed(int revision);
int ata_speed2revision(u_int speed);
int ata_identify_match(caddr_t identbuffer, caddr_t table_entry);
int ata_static_identify_match(caddr_t identbuffer, caddr_t table_entry);
void semb_print_ident(struct sep_identify_data *ident_data);
void semb_receive_diagnostic_results(struct ccb_ataio *ataio,
u_int32_t retries, void (*cbfcnp)(struct cam_periph *, union ccb*),
uint8_t tag_action, int pcv, uint8_t page_code,
uint8_t *data_ptr, uint16_t allocation_length, uint32_t timeout);
void semb_send_diagnostic(struct ccb_ataio *ataio,
u_int32_t retries, void (*cbfcnp)(struct cam_periph *, union ccb *),
uint8_t tag_action, uint8_t *data_ptr, uint16_t param_list_length,
uint32_t timeout);
void semb_read_buffer(struct ccb_ataio *ataio,
u_int32_t retries, void (*cbfcnp)(struct cam_periph *, union ccb*),
uint8_t tag_action, uint8_t page_code,
uint8_t *data_ptr, uint16_t allocation_length, uint32_t timeout);
void semb_write_buffer(struct ccb_ataio *ataio,
u_int32_t retries, void (*cbfcnp)(struct cam_periph *, union ccb *),
uint8_t tag_action, uint8_t *data_ptr, uint16_t param_list_length,
uint32_t timeout);
#endif
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