_MachMessages.h

#ifndef __MK__MachMessages_H___
#define __MK__MachMessages_H___
/* Copyright 1988-1992, NeXT Inc.  All rights reserved. */
/*
 * HISTORY
 * 23-Aug-90  Gregg Kellogg (gk) at NeXT
 *      Added SND_DSP_PROTO_TXD for 040 TXD interrupt support.
 *
 * 23-Aug-90  Gregg Kellogg (gk) at NeXT
 *      Support message passing protocol change so the reply port isn't
 *      used for passing permissions (set_owner, get_stream, dsp_proto,
 *      and get_dsp_cmd_port).
 *
 * 21-Aug-90  Julius Smith (jos) at NeXT
 *      Added protocol message type for setting the protocol from the
 *      dsp command queue.
 *
 * 10-Dec-88  Gregg Kellogg (gk) at NeXT
 *      Created.
 *
 */ 
#import <mach/mach_types.h>
#import <mach/message.h>

/*
 * Message component type codes on stream port.
 */
typedef struct {
        int     typeType;
        unsigned int    type;
#define SND_MT_PLAY_DATA        0       // data to be played (with size)
#define SND_MT_RECORD_DATA      1       // number of bytes to record
#define SND_MT_OPTIONS          2       // high/low water and dma size options
#define SND_MT_CONTROL          3       // await/abort/pause/continue
#define SND_MT_NDMA             4       // number of dma descs in stream.
} snd_msg_type_t;

/*
 * Interface message formats
 */

/*
 * Messages sent from the kernel
 */
typedef struct {
        mach_msg_header_t       header;
        int     data_tagType;
        int             data_tag;
        int     dataType;
        pointer_t       recorded_data;
} snd_recorded_data_t;

typedef struct {
        mach_msg_header_t       header;
        int     data_tagType;
        int             data_tag;
} snd_taged_reply_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
        int             nsamples;
} snd_ret_samples_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
        unsigned int    parms;
#define SND_PARM_LOWPASS        0x1
#define SND_PARM_SPEAKER        0x2
#define SND_PARM_ZEROFILL       0x4
} snd_ret_parms_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
        unsigned int    volume;
#define SND_VOLUME_RCHAN_MASK   0xff
#define SND_VOLUME_RCHAN_SHIFT  0
#define SND_VOLUME_LCHAN_MASK   0xff00
#define SND_VOLUME_LCHAN_SHIFT  8
} snd_ret_volume_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
        int             dsp_regs;
} snd_ret_dsp_regs_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
        unsigned int    ill_msgid;      // message id of bad message.
        unsigned int    ill_error;      // error returned
#define SND_NO_ERROR    100     // non-error ack.
#define SND_BAD_PORT    101     // message sent to wrong port
#define SND_BAD_MSG     102     // unknown message id
#define SND_BAD_PARM    103     // bad parameter list in message
#define SND_NO_MEMORY   104     // can't allocate memory (record)
#define SND_PORT_BUSY   105     // access req'd to existing excl access port
#define SND_NOT_OWNER   106     // must be owner to do this
#define SND_BAD_CHAN    107     // dsp channel hasn't been inited
#define SND_SEARCH      108     // couldn't find requested resource
#define SND_NODATA      109     // can't send data commands to dsp in this mode
#define SND_NOPAGER     110     // can't allocate from external pager (record).
#define SND_NOTALIGNED  111     // bad data alignment.
#define SND_BAD_HOST_PRIV 112   // bad host privilege port passed.
#define SND_BAD_PROTO   113     // can't do requested operation given protocol
} snd_illegal_msg_t;

typedef struct {mach_msg_header_t header;} snd_ret_mach_port_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
        unsigned int    mask;
        unsigned int    flags;
        unsigned int    value;
} snd_dsp_cond_true_t;

/*
 * Messages sent from the user to the device
 */
typedef struct {
        mach_msg_header_t       header;
        int     Type;
        unsigned int    stream;
        int     ownerType;
        mach_port_t             owner;
} snd_get_stream_t;

#define SND_GD_CHAN_MASK        0x7f
#define SND_GD_CHAN_SHIFT       0
#define SND_GD_DEVICE_MASK      0x80
#define SND_GD_DEVICE_SHIFT     7

#define snd_gd_bitmap(chan, device) \
        (((chan)<<SND_GD_CHAN_SHIFT) | ((device)<<SND_GD_DEVICE_SHIFT))

#define snd_gd_isdevice(bitmap)  ((bitmap)&SND_GD_DEVICE_MASK)
#define snd_gd_chan(bitmap) ((bitmap)&SND_GD_CHAN_MASK)

#define SND_GD_SOUT_44  snd_gd_bitmap(0, TRUE)
#define SND_GD_SOUT_22  snd_gd_bitmap(1, TRUE)
#define SND_GD_SIN      snd_gd_bitmap(2, TRUE)
#define SND_GD_DSP_OUT  snd_gd_bitmap(DSP_SO_CHAN, FALSE) // sound out from dsp
#define SND_GD_DSP_IN   snd_gd_bitmap(DSP_SI_CHAN, FALSE) // sound in to dsp

typedef struct {
        mach_msg_header_t       header;
        int     Type;
        unsigned int    parms;
} snd_set_parms_t;

typedef struct {
        mach_msg_header_t       header;
        int     Type;
        unsigned int    volume;
} snd_set_volume_t;

typedef struct {
        mach_msg_header_t       header;
        int     Type;
        unsigned int    proto;
        int     ownerType;
        mach_port_t             owner;
} snd_dsp_proto_t;

#define SND_DSP_PROTO_DSPERR    0x1     // DSP error messages enabled
#define SND_DSP_PROTO_C_DMA     0x2     // complex dma mode
#define SND_DSP_PROTO_S_DMA     0x4     // simple dma mode
#define SND_DSP_PROTO_LINKOUT   0x8     // link directly to sound out
#define SND_DSP_PROTO_LINKIN    0x10    // link directly to sound out
#define SND_DSP_PROTO_SOUNDDATA 0x20    // all data to dsp is sound samples
#define SND_DSP_PROTO_HIGH      0x40    // 44khz sound out
#define SND_DSP_PROTO_HFABORT   0x80    // DSP abort indicated by HF2 & HF3
#define SND_DSP_PROTO_DSPMSG    0x100   // DSP messages enabled
#define SND_DSP_PROTO_RAW       0x200   // DSP messages enabled
#define SND_DSP_PROTO_TXD       0x400   // DSP txd interrupt enable (040 only)

typedef mach_msg_header_t       snd_get_parms_t;
typedef mach_msg_header_t       snd_get_volume_t;

typedef struct {
        mach_msg_header_t       header;
        int     ownerType;
        mach_port_t             owner;          // owner port
} snd_get_dsp_cmd_mach_port_t;

typedef struct {
        mach_msg_header_t       header;
        int     negType;
        mach_port_t             negotiation;    // negotiation port
        int     ownerType;
        mach_port_t             owner;          // owner port
} snd_set_owner_t;

typedef struct {
        mach_msg_header_t       header;
        int     old_ownerType;
        mach_port_t             old_owner;
        int     new_ownerType;
        mach_port_t             new_owner;
        int     new_negotiationType;
        mach_port_t             new_negotiation;
} snd_reset_owner_t;

typedef struct {
        mach_msg_header_t       header;
        int     privType;
        mach_port_t             priv;
} snd_new_device_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
#define DSP_DEF_BUFSIZE 512                     // default #words in each buf
        unsigned int    data[DSP_DEF_BUFSIZE];
} snd_dsp_msg_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
#define DSP_DEF_EBUFSIZE 32                     // default #words in each buf
        unsigned int    data[DSP_DEF_EBUFSIZE];
} snd_dsp_err_t;

/*
 * Messages sent from the user to a stream port
 * There's only one message, but it can contain some combination
 * of several different sub-messages.
 */
typedef struct snd_stream_msg {
        mach_msg_header_t       header;
        int     data_tagType;
        int             data_tag;               // tag for this request, 0 def
} snd_stream_msg_t;

typedef struct {
        snd_msg_type_t  msgtype;
        int     optionsType;
        unsigned int    options;
#define SND_DM_STARTED_MSG      0x01
#define SND_DM_COMPLETED_MSG    0x02
#define SND_DM_ABORTED_MSG      0x04
#define SND_DM_PAUSED_MSG       0x08
#define SND_DM_RESUMED_MSG      0x10
#define SND_DM_OVERFLOW_MSG     0x20
#define SND_DM_PREEMPT          0x40
        int     reg_portType;
        mach_port_t             reg_port;       // remote port for region messages
        int     dataType;
        pointer_t       data;
} snd_stream_play_data_t;

typedef struct {
        snd_msg_type_t  msgtype;
        int     optionsType;
        unsigned int    options;
        int             nbytes;
        int     reg_portType;
        mach_port_t             reg_port;       // remote port for region messages
        int     filenameType;   // filename string follows inline
} snd_stream_record_data_t;

typedef struct {
        snd_msg_type_t  msgtype;
        int     controlType;
        unsigned int    snd_control;
#define SND_DC_AWAIT    0x1
#define SND_DC_ABORT    0x2
#define SND_DC_PAUSE    0x4
#define SND_DC_RESUME   0x8
} snd_stream_control_t;

typedef struct {
        snd_msg_type_t  msg_type;
        int     optionsType;
        unsigned int    high_water;
        unsigned int    low_water;
        unsigned int    dma_size;
} snd_stream_options_t;

/*
 * Number of dma descriptors used in stream.
 */
typedef struct {
        snd_msg_type_t  msg_type;
        int     ndmaType;
        unsigned int    ndma;
} snd_stream_ndma_t;

/*
 * Nsamples is another message on a stream port.
 */
typedef struct {
        mach_msg_header_t       header;
} snd_stream_nsamples_t;

/*
 * Messages sent by user to dsp command port.
 */
typedef struct {
        mach_msg_header_t       header;
        int     reg_maskType;
        unsigned int    mask;           // mask of flags to inspect
        unsigned int    flags;          // set of flags that must be on
        int     ret_portType;
        mach_port_t             ret_port;       // remote port for ret_msg
        int     ret_msgType;
        /*
         * follows is the body of the (simple) message to send
         * either to msgh_remote_port, or to snd_var.dsp  (if PORT_NULL).
         */
        mach_msg_header_t       ret_msg;        // possibly longer than this.
} snd_dspcmd_event_t;

typedef struct {
        mach_msg_header_t       header;
        int     dataType;
        int             addr;           // .. of dsp buffer
        int             size;           // .. of dsp buffer
        int             skip;           // dma skip factor
#define DSP_SKIP_0      1
#define DSP_SKIP_CONTIG DSP_SKIP_0
#define DSP_SKIP_1      2
#define DSP_SKIP_2      3
#define DSP_SKIP_3      4
#define DSP_SKIP_4      5
        int             space;          // dsp space of buffer
#define DSP_SPACE_X     1
#define DSP_SPACE_Y     2
#define DSP_SPACE_L     3
#define DSP_SPACE_P     4
        int             mode;           // mode of dma [1..5]
#define DSP_MODE8       1
#define DSP_MODE16      2
#define DSP_MODE24      3
#define DSP_MODE32      4
#define DSP_MODE2416    5               /* Pseudo-dma shift 24 to 16 bits */
#define SND_MODE_MIN    1               /* Minimum value for mode */
#define SND_MODE_MAX    5               /* Maximum value for mode */
        int             chan;           // channel for dma
#define DSP_USER_REQ_CHAN 0     // for user-requested dma's
#define DSP_SO_CHAN     1       // for sound-out dma's.
#define DSP_SI_CHAN     2       // for sound-in dma's
#define DSP_USER_CHAN   3       // first user chan

#define DSP_N_USER_CHAN 16      // 0..15 for user dma.
} snd_dspcmd_chandata_t;

typedef struct {
        mach_msg_header_t       header;
        int     chandataType;
        int             addr;           // .. of dsp buffer
        int             size;           // .. of dsp buffer
        int             skip;           // dma skip factor
        int             space;          // dsp space of buffer
        int             mode;           // mode of dma [1..5]
        int     dataType;
        pointer_t       data;           // data to output
} snd_dspcmd_dma_t;

typedef mach_msg_header_t       snd_dspcmd_abortdma_t;
typedef mach_msg_header_t       snd_dspcmd_req_err_t;
typedef mach_msg_header_t       snd_dspcmd_req_msg_t;

/*
 * Multi-part dspcmd_msg.
 */
/*
 * Message component type codes on stream port.
 */
typedef struct {
        int     typeType;
        unsigned int    type;
#define SND_DSP_MT_DATA         1       // 1, 2, or 4 byte data
#define SND_DSP_MT_HOST_COMMAND 2       // host command
#define SND_DSP_MT_HOST_FLAG    3       // host flag(s) to set
#define SND_DSP_MT_RET_MSG      4       // (simple) message to send
#define SND_DSP_MT_RESET        5       // hard reset the DSP
#define SND_DSP_MT_GET_REGS     6       // return DSP host I/F registers
#define SND_DSP_MT_CONDITION    7       // wait for condition (return msg)
#define SND_DSP_MT_RDATA        8       // read 1, 2, or 4 byte data
#define SND_DSP_MT_PROTO        9       // DSP protocol
} snd_dsp_type_t;

typedef struct {
        mach_msg_header_t       header;
        int     priType;
        int             pri;            // Priority of message group
#define DSP_MSG_HIGH            0
#define DSP_MSG_MED             1
#define DSP_MSG_LOW             2
        boolean_t       atomic;         // don't preempt this msg with another
} snd_dspcmd_msg_t;

typedef struct {
        snd_dsp_type_t  msgtype;
        int     conditionType;
        unsigned int    mask;           // mask of flags to inspect
        unsigned int    flags;          // set of flags that must be on
        int     reply_portType;
        mach_port_t             reply_port;     // were to send device regs to
} snd_dsp_condition_t;

typedef struct {
        snd_dsp_type_t  msgtype;
        int     dataType;
        pointer_t       data;           // data to send
} snd_dsp_data_t;

typedef struct {
        snd_dsp_type_t  msgtype;
        int     hcType;
        unsigned int    hc;             // host command
} snd_dsp_host_command_t;

typedef struct {
        snd_dsp_type_t  msgtype;
        int     protoType;      // protocol modification
        unsigned int    proto;
} snd_dsp_mt_proto_t;

typedef struct {
        snd_dsp_type_t  msgtype;
        int     hfType;
        unsigned int    mask;           // mask of HF0|HF1
        unsigned int    flags;          // flags to set
} snd_dsp_host_flag_t;

typedef struct {
        snd_dsp_type_t  msgtype;
        int     ret_portType;
        mach_port_t             ret_port;       // remote port for ret_msg
        int     ret_msgType;
        /*
         * follows is the body of the (simple) message to send
         * either to msgh_remote_port, or to snd_var.dspowner (if PORT_NULL).
         */
        mach_msg_header_t       ret_msg;        // possibly longer than this.
} snd_dsp_ret_msg_t;

typedef struct {
        snd_dsp_type_t  msgtype;
} snd_dsp_reset_t, snd_dsp_get_regs_t;

/*
 * Message Id's
 */
#define SND_MSG_BASE            0

/*
 * User messages on stream port
 */
#define SND_MSG_STREAM_BASE     SND_MSG_BASE+0
#define SND_MSG_STREAM_MSG      SND_MSG_STREAM_BASE+0
#define SND_MSG_STREAM_NSAMPLES SND_MSG_STREAM_BASE+1

/*
 * User messages on device port
 */
#define SND_MSG_DEVICE_BASE             SND_MSG_BASE+100
#define SND_MSG_GET_STREAM              SND_MSG_DEVICE_BASE+0
#define SND_MSG_SET_PARMS               SND_MSG_DEVICE_BASE+1
#define SND_MSG_GET_PARMS               SND_MSG_DEVICE_BASE+2
#define SND_MSG_SET_VOLUME              SND_MSG_DEVICE_BASE+3
#define SND_MSG_GET_VOLUME              SND_MSG_DEVICE_BASE+4
#define SND_MSG_SET_DSPOWNER            SND_MSG_DEVICE_BASE+5
#define SND_MSG_SET_SNDINOWNER          SND_MSG_DEVICE_BASE+6
#define SND_MSG_SET_SNDOUTOWNER         SND_MSG_DEVICE_BASE+7
#define SND_MSG_DSP_PROTO               SND_MSG_DEVICE_BASE+8
#define SND_MSG_GET_DSP_CMD_PORT        SND_MSG_DEVICE_BASE+9
#define SND_MSG_NEW_DEVICE_PORT         SND_MSG_DEVICE_BASE+10
#define SND_MSG_RESET_DSPOWNER          SND_MSG_DEVICE_BASE+11
#define SND_MSG_RESET_SNDINOWNER        SND_MSG_DEVICE_BASE+12
#define SND_MSG_RESET_SNDOUTOWNER       SND_MSG_DEVICE_BASE+13
#define SND_MSG_SET_RAMP                SND_MSG_DEVICE_BASE+14
/*
 * Set ramp parameter
 */
#define SND_PARM_RAMPUP         0x1     /* Ramp sound up */
#define SND_PARM_RAMPDOWN       0x2     /* Ramp sound down */

/*
 * User messages on dsp command port
 */
#define SND_MSG_DSP_BASE        SND_MSG_BASE+200
#define SND_MSG_DSP_MSG         SND_MSG_DSP_BASE+0
#define SND_MSG_DSP_EVENT       SND_MSG_DSP_BASE+1
#define SND_MSG_DSP_CHANDATA    SND_MSG_DSP_BASE+2
#define SND_MSG_DSP_DMAOUT      SND_MSG_DSP_BASE+3
#define SND_MSG_DSP_DMAIN       SND_MSG_DSP_BASE+4
#define SND_MSG_DSP_ABORTDMA    SND_MSG_DSP_BASE+5
#define SND_MSG_DSP_REQ_MSG     SND_MSG_DSP_BASE+6
#define SND_MSG_DSP_REQ_ERR     SND_MSG_DSP_BASE+7

/*
 * Kernel messages returned.
 */
#define SND_MSG_KERN_BASE       SND_MSG_BASE+300
#define SND_MSG_RECORDED_DATA   SND_MSG_KERN_BASE+0
#define SND_MSG_TIMED_OUT       SND_MSG_KERN_BASE+1
#define SND_MSG_RET_SAMPLES     SND_MSG_KERN_BASE+2
#define SND_MSG_RET_DEVICE      SND_MSG_KERN_BASE+3
#define SND_MSG_RET_STREAM      SND_MSG_KERN_BASE+4
#define SND_MSG_RET_PARMS       SND_MSG_KERN_BASE+5
#define SND_MSG_RET_VOLUME      SND_MSG_KERN_BASE+6
#define SND_MSG_OVERFLOW        SND_MSG_KERN_BASE+7
#define SND_MSG_STARTED         SND_MSG_KERN_BASE+9
#define SND_MSG_COMPLETED       SND_MSG_KERN_BASE+10
#define SND_MSG_ABORTED         SND_MSG_KERN_BASE+11
#define SND_MSG_PAUSED          SND_MSG_KERN_BASE+12
#define SND_MSG_RESUMED         SND_MSG_KERN_BASE+13
#define SND_MSG_ILLEGAL_MSG     SND_MSG_KERN_BASE+14
#define SND_MSG_RET_DSP_ERR     SND_MSG_KERN_BASE+15
#define SND_MSG_RET_DSP_MSG     SND_MSG_KERN_BASE+16
#define SND_MSG_RET_CMD         SND_MSG_KERN_BASE+17
#define SND_MSG_DSP_REGS        SND_MSG_KERN_BASE+18
#define SND_MSG_DSP_COND_TRUE   SND_MSG_KERN_BASE+19

/*
 * Ioctl for retrieving device port.
 */
#ifdef  _IO
#define SOUNDIOCDEVPORT _IO('A', 8)
#endif  _IO

/*
 * Routine prototypes
 */
#if     KERNEL
kern_return_t snd_reply_recorded_data (
        mach_port_t             remote_port,    // who to reply to
        int             data_tag,       // tag from region
        pointer_t       data,           // recorded data
        int             nbytes,         // number of bytes of data to send
        int             in_line);       // "Send data inline" flag.
kern_return_t snd_reply_timed_out (
        mach_port_t             remote_port,    // who to send it to.
        int             data_tag);      // tag from region
kern_return_t snd_reply_ret_samples (
        mach_port_t             remote_port,    // who to send it to.
        int             nsamples);      // number of bytes of data to record
kern_return_t snd_reply_ret_device (
        mach_port_t             remote_port,    // who to send it to.
        mach_port_t             device_port);   // returned port.
kern_return_t snd_reply_ret_stream (
        mach_port_t             remote_port,    // who to send it to.
        mach_port_t             stream_port);   // returned port.
kern_return_t snd_reply_ret_parms (
        mach_port_t             remote_port,    // who to send it to.
        unsigned int    parms);
kern_return_t snd_reply_ret_volume (
        mach_port_t             remote_port,    // who to send it to.
        unsigned int    volume);
kern_return_t snd_reply_overflow (
        mach_port_t             remote_port,    // who to send it to.
        int             data_tag);      // from region
kern_return_t snd_reply_started (
        mach_port_t             remote_port,    // who to send it to.
        int             data_tag);      // from region
kern_return_t snd_reply_completed (
        mach_port_t             remote_port,    // who to send it to.
        int             data_tag);      // from region
kern_return_t snd_reply_aborted (
        mach_port_t             remote_port,    // who to send it to.
        int             data_tag);      // from region
kern_return_t snd_reply_paused (
        mach_port_t             remote_port,    // who to send it to.
        int             data_tag);      // from region
kern_return_t snd_reply_resumed (
        mach_port_t             remote_port,    // who to send it to.
        int             data_tag);      // from region
kern_return_t snd_reply_illegal_msg (
        mach_port_t             local_port,     // returned port of interest
        mach_port_t             remote_port,    // who to send it to.
        int             msgh_id,                // message id with illegal syntax       
        int             error);         // error code
kern_return_t snd_reply_dsp_err (
        mach_port_t             remote_port);   // who to send it to.
kern_return_t snd_reply_dsp_msg (
        mach_port_t             remote_port);   // who to send it to.
kern_return_t snd_reply_dsp_cmd_port(
        mach_port_t             cmd_port,       // port to return.
        mach_port_t             remote_port);   // where to return it
kern_return_t snd_reply_dsp_regs (
        int             regs);          // DSP host I/F registers (not recieve)
kern_return_t snd_reply_dsp_cond_true ( // reply indicating condition true
        vm_address_t    ret_cond);      // reply_port, status and conditions
#endif  KERNEL

#endif

---