48c6bb79f4
SYSLIB CHANGES: - DS calls to publish / retrieve labels consider endpoints instead of u32_t. VFS CHANGES: - mapdriver() only adds an entry in the dmap table in VFS. - dev_up() is only executed upon reception of a driver up event. INET CHANGES: - INET no longer searches for existing drivers instances at startup. - A newtwork driver is (re)initialized upon reception of a driver up event. - Networking startup is now race-free by design. No need to waste 5 seconds at startup any more. DRIVER CHANGES: - Every driver publishes driver up events when starting for the first time or in case of restart when recovery actions must be taken in the upper layers. - Driver up events are published by drivers through DS. - For regular drivers, VFS is normally the only subscriber, but not necessarily. For instance, when the filter driver is in use, it must subscribe to driver up events to initiate recovery. - For network drivers, inet is the only subscriber for now. - Every VFS driver is statically linked with libdriver, every network driver is statically linked with libnetdriver. DRIVER LIBRARIES CHANGES: - Libdriver is extended to provide generic receive() and ds_publish() interfaces for VFS drivers. - driver_receive() is a wrapper for sef_receive() also used in driver_task() to discard spurious messages that were meant to be delivered to a previous version of the driver. - driver_receive_mq() is the same as driver_receive() but integrates support for queued messages. - driver_announce() publishes a driver up event for VFS drivers and marks the driver as initialized and expecting a DEV_OPEN message. - Libnetdriver is introduced to provide similar receive() and ds_publish() interfaces for network drivers (netdriver_announce() and netdriver_receive()). - Network drivers all support live update with no state transfer now. KERNEL CHANGES: - Added kernel call statectl for state management. Used by driver_announce() to unblock eventual callers sendrecing to the driver.
96 lines
3.6 KiB
C
96 lines
3.6 KiB
C
/* Types and constants shared between the generic and device dependent
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* device driver code.
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*/
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#define _POSIX_SOURCE 1 /* tell headers to include POSIX stuff */
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#define _MINIX 1 /* tell headers to include MINIX stuff */
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#define _SYSTEM 1 /* get negative error number in <errno.h> */
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/* The following are so basic, all the *.c files get them automatically. */
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#include <minix/config.h> /* MUST be first */
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#include <ansi.h> /* MUST be second */
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#include <minix/type.h>
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#include <minix/ipc.h>
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#include <minix/com.h>
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#include <minix/callnr.h>
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#include <sys/types.h>
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#include <minix/const.h>
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#include <minix/syslib.h>
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#include <minix/sysutil.h>
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#include <minix/endpoint.h>
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#include <string.h>
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#include <limits.h>
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#include <stddef.h>
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#include <errno.h>
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#include <minix/partition.h>
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#include <minix/u64.h>
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/* Info about and entry points into the device dependent code. */
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struct driver {
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_PROTOTYPE( char *(*dr_name), (void) );
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_PROTOTYPE( int (*dr_open), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_close), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_ioctl), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( struct device *(*dr_prepare), (int device) );
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_PROTOTYPE( int (*dr_transfer), (int proc_nr, int opcode, u64_t position,
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iovec_t *iov, unsigned nr_req) );
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_PROTOTYPE( void (*dr_cleanup), (void) );
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_PROTOTYPE( void (*dr_geometry), (struct partition *entry) );
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_PROTOTYPE( void (*dr_alarm), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_cancel), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_select), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_other), (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int (*dr_hw_int), (struct driver *dp, message *m_ptr) );
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};
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/* Base and size of a partition in bytes. */
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struct device {
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u64_t dv_base;
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u64_t dv_size;
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};
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#define NIL_DEV ((struct device *) 0)
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#define DRIVER_STD 0 /* Use the standard reply protocol */
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#define DRIVER_ASYN 1 /* Use the new asynchronous protocol */
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#define MAX_NR_OPEN_DEVICES 16
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#define IS_DEV_MINOR_RQ(type) (IS_DEV_RQ(type) && (type) != DEV_STATUS)
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/* Functions defined by driver.c: */
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_PROTOTYPE( void driver_announce, (void) );
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_PROTOTYPE( int driver_receive, (endpoint_t src, message *m_ptr,
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int *status_ptr) );
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_PROTOTYPE( int driver_receive_mq, (message *m_ptr, int *status_ptr) );
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_PROTOTYPE( void driver_task, (struct driver *dr, int type) );
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_PROTOTYPE( int driver_mq_queue, (message *m_ptr, int status) );
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_PROTOTYPE( void driver_init_buffer, (void) );
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_PROTOTYPE( char *no_name, (void) );
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_PROTOTYPE( int do_nop, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( struct device *nop_prepare, (int device) );
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_PROTOTYPE( void nop_cleanup, (void) );
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_PROTOTYPE( void nop_task, (void) );
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_PROTOTYPE( void nop_alarm, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int nop_cancel, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int nop_select, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int do_diocntl, (struct driver *dp, message *m_ptr) );
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_PROTOTYPE( int nop_ioctl, (struct driver *dp, message *m_ptr) );
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/* Parameters for the disk drive. */
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#define SECTOR_SIZE 512 /* physical sector size in bytes */
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#define SECTOR_SHIFT 9 /* for division */
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#define SECTOR_MASK 511 /* and remainder */
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/* Size of the DMA buffer buffer in bytes. */
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#define USE_EXTRA_DMA_BUF 0 /* usually not needed */
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#define DMA_BUF_SIZE (DMA_SECTORS * SECTOR_SIZE)
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#if (CHIP == INTEL)
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extern u8_t *tmp_buf; /* the DMA buffer */
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#else
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extern u8_t tmp_buf[]; /* the DMA buffer */
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#endif
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extern phys_bytes tmp_phys; /* phys address of DMA buffer */
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