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linux-next/sound/pci/mixart/mixart_core.h
David Howells 7d12e780e0 IRQ: Maintain regs pointer globally rather than passing to IRQ handlers 
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead
of passing regs around manually through all ~1800 interrupt handlers in the
Linux kernel.

The regs pointer is used in few places, but it potentially costs both stack
space and code to pass it around.  On the FRV arch, removing the regs parameter
from all the genirq function results in a 20% speed up of the IRQ exit path
(ie: from leaving timer_interrupt() to leaving do_IRQ()).

Where appropriate, an arch may override the generic storage facility and do
something different with the variable.  On FRV, for instance, the address is
maintained in GR28 at all times inside the kernel as part of general exception
handling.

Having looked over the code, it appears that the parameter may be handed down
through up to twenty or so layers of functions.  Consider a USB character
device attached to a USB hub, attached to a USB controller that posts its
interrupts through a cascaded auxiliary interrupt controller.  A character
device driver may want to pass regs to the sysrq handler through the input
layer which adds another few layers of parameter passing.

I've build this code with allyesconfig for x86_64 and i386.  I've runtested the
main part of the code on FRV and i386, though I can't test most of the drivers.
I've also done partial conversion for powerpc and MIPS - these at least compile
with minimal configurations.

This will affect all archs.  Mostly the changes should be relatively easy.
Take do_IRQ(), store the regs pointer at the beginning, saving the old one:

	struct pt_regs *old_regs = set_irq_regs(regs);

And put the old one back at the end:

	set_irq_regs(old_regs);

Don't pass regs through to generic_handle_irq() or __do_IRQ().

In timer_interrupt(), this sort of change will be necessary:

	-	update_process_times(user_mode(regs));
	-	profile_tick(CPU_PROFILING, regs);
	+	update_process_times(user_mode(get_irq_regs()));
	+	profile_tick(CPU_PROFILING);

I'd like to move update_process_times()'s use of get_irq_regs() into itself,
except that i386, alone of the archs, uses something other than user_mode().

Some notes on the interrupt handling in the drivers:

 (*) input_dev() is now gone entirely.  The regs pointer is no longer stored in
     the input_dev struct.

 (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking.  It does
     something different depending on whether it's been supplied with a regs
     pointer or not.

 (*) Various IRQ handler function pointers have been moved to type
     irq_handler_t.

Signed-Off-By: David Howells <dhowells@redhat.com>
(cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-10-05 15:10:12 +01:00

572 lines
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/*
* Driver for Digigram miXart soundcards
*
* low level interface with interrupt handling and mail box implementation
*
* Copyright (c) 2003 by Digigram <alsa@digigram.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef __SOUND_MIXART_CORE_H
#define __SOUND_MIXART_CORE_H
enum mixart_message_id {
MSG_CONNECTOR_GET_AUDIO_INFO = 0x050008,
MSG_CONNECTOR_GET_OUT_AUDIO_LEVEL = 0x050009,
MSG_CONNECTOR_SET_OUT_AUDIO_LEVEL = 0x05000A,
MSG_CONSOLE_MANAGER = 0x070000,
MSG_CONSOLE_GET_CLOCK_UID = 0x070003,
MSG_PHYSICALIO_SET_LEVEL = 0x0F0008,
MSG_STREAM_ADD_INPUT_GROUP = 0x130000,
MSG_STREAM_ADD_OUTPUT_GROUP = 0x130001,
MSG_STREAM_DELETE_GROUP = 0x130004,
MSG_STREAM_START_STREAM_GRP_PACKET = 0x130006,
MSG_STREAM_START_INPUT_STAGE_PACKET = 0x130007,
MSG_STREAM_START_OUTPUT_STAGE_PACKET = 0x130008,
MSG_STREAM_STOP_STREAM_GRP_PACKET = 0x130009,
MSG_STREAM_STOP_INPUT_STAGE_PACKET = 0x13000A,
MSG_STREAM_STOP_OUTPUT_STAGE_PACKET = 0x13000B,
MSG_STREAM_SET_INPUT_STAGE_PARAM = 0x13000F,
MSG_STREAM_SET_OUTPUT_STAGE_PARAM = 0x130010,
MSG_STREAM_SET_IN_AUDIO_LEVEL = 0x130015,
MSG_STREAM_SET_OUT_STREAM_LEVEL = 0x130017,
MSG_SYSTEM_FIRST_ID = 0x160000,
MSG_SYSTEM_ENUM_PHYSICAL_IO = 0x16000E,
MSG_SYSTEM_ENUM_PLAY_CONNECTOR = 0x160017,
MSG_SYSTEM_ENUM_RECORD_CONNECTOR = 0x160018,
MSG_SYSTEM_WAIT_SYNCHRO_CMD = 0x16002C,
MSG_SYSTEM_SEND_SYNCHRO_CMD = 0x16002D,
MSG_SERVICES_TIMER_NOTIFY = 0x1D0404,
MSG_SERVICES_REPORT_TRACES = 0x1D0700,
MSG_CLOCK_CHECK_PROPERTIES = 0x200001,
MSG_CLOCK_SET_PROPERTIES = 0x200002,
};
struct mixart_msg
{
u32 message_id;
struct mixart_uid uid;
void* data;
size_t size;
};
/* structs used to communicate with miXart */
struct mixart_enum_connector_resp
{
u32 error_code;
u32 first_uid_offset;
u32 uid_count;
u32 current_uid_index;
struct mixart_uid uid[MIXART_MAX_PHYS_CONNECTORS];
} __attribute__((packed));
/* used for following struct */
#define MIXART_FLOAT_P_22_0_TO_HEX 0x41b00000 /* 22.0f */
#define MIXART_FLOAT_M_20_0_TO_HEX 0xc1a00000 /* -20.0f */
#define MIXART_FLOAT____0_0_TO_HEX 0x00000000 /* 0.0f */
struct mixart_audio_info_req
{
u32 line_max_level; /* float */
u32 micro_max_level; /* float */
u32 cd_max_level; /* float */
} __attribute__((packed));
struct mixart_analog_hw_info
{
u32 is_present;
u32 hw_connection_type;
u32 max_level; /* float */
u32 min_var_level; /* float */
u32 max_var_level; /* float */
u32 step_var_level; /* float */
u32 fix_gain; /* float */
u32 zero_var; /* float */
} __attribute__((packed));
struct mixart_digital_hw_info
{
u32 hw_connection_type;
u32 presence;
u32 clock;
u32 reserved;
} __attribute__((packed));
struct mixart_analog_info
{
u32 type_mask;
struct mixart_analog_hw_info micro_info;
struct mixart_analog_hw_info line_info;
struct mixart_analog_hw_info cd_info;
u32 analog_level_present;
} __attribute__((packed));
struct mixart_digital_info
{
u32 type_mask;
struct mixart_digital_hw_info aes_info;
struct mixart_digital_hw_info adat_info;
} __attribute__((packed));
struct mixart_audio_info
{
u32 clock_type_mask;
struct mixart_analog_info analog_info;
struct mixart_digital_info digital_info;
} __attribute__((packed));
struct mixart_audio_info_resp
{
u32 txx_status;
struct mixart_audio_info info;
} __attribute__((packed));
/* used for nb_bytes_max_per_sample */
#define MIXART_FLOAT_P__4_0_TO_HEX 0x40800000 /* +4.0f */
#define MIXART_FLOAT_P__8_0_TO_HEX 0x41000000 /* +8.0f */
struct mixart_stream_info
{
u32 size_max_byte_frame;
u32 size_max_sample_frame;
u32 nb_bytes_max_per_sample; /* float */
} __attribute__((packed));
/* MSG_STREAM_ADD_INPUT_GROUP */
/* MSG_STREAM_ADD_OUTPUT_GROUP */
struct mixart_streaming_group_req
{
u32 stream_count;
u32 channel_count;
u32 user_grp_number;
u32 first_phys_audio;
u32 latency;
struct mixart_stream_info stream_info[32];
struct mixart_uid connector;
u32 flow_entry[32];
} __attribute__((packed));
struct mixart_stream_desc
{
struct mixart_uid stream_uid;
u32 stream_desc;
} __attribute__((packed));
struct mixart_streaming_group
{
u32 status;
struct mixart_uid group;
u32 pipe_desc;
u32 stream_count;
struct mixart_stream_desc stream[32];
} __attribute__((packed));
/* MSG_STREAM_DELETE_GROUP */
/* request : mixart_uid_t group */
struct mixart_delete_group_resp
{
u32 status;
u32 unused[2];
} __attribute__((packed));
/* MSG_STREAM_START_INPUT_STAGE_PACKET = 0x130000 + 7,
MSG_STREAM_START_OUTPUT_STAGE_PACKET = 0x130000 + 8,
MSG_STREAM_STOP_INPUT_STAGE_PACKET = 0x130000 + 10,
MSG_STREAM_STOP_OUTPUT_STAGE_PACKET = 0x130000 + 11,
*/
struct mixart_fx_couple_uid
{
struct mixart_uid uid_fx_code;
struct mixart_uid uid_fx_data;
} __attribute__((packed));
struct mixart_txx_stream_desc
{
struct mixart_uid uid_pipe;
u32 stream_idx;
u32 fx_number;
struct mixart_fx_couple_uid uid_fx[4];
} __attribute__((packed));
struct mixart_flow_info
{
struct mixart_txx_stream_desc stream_desc;
u32 flow_entry;
u32 flow_phy_addr;
} __attribute__((packed));
struct mixart_stream_state_req
{
u32 delayed;
u64 scheduler;
u32 reserved4np[3];
u32 stream_count; /* set to 1 for instance */
struct mixart_flow_info stream_info; /* could be an array[stream_count] */
} __attribute__((packed));
/* MSG_STREAM_START_STREAM_GRP_PACKET = 0x130000 + 6
MSG_STREAM_STOP_STREAM_GRP_PACKET = 0x130000 + 9
*/
struct mixart_group_state_req
{
u32 delayed;
u64 scheduler;
u32 reserved4np[2];
u32 pipe_count; /* set to 1 for instance */
struct mixart_uid pipe_uid[1]; /* could be an array[pipe_count] */
} __attribute__((packed));
struct mixart_group_state_resp
{
u32 txx_status;
u64 scheduler;
} __attribute__((packed));
/* Structures used by the MSG_SERVICES_TIMER_NOTIFY command */
struct mixart_sample_pos
{
u32 buffer_id;
u32 validity;
u32 sample_pos_high_part;
u32 sample_pos_low_part;
} __attribute__((packed));
struct mixart_timer_notify
{
u32 stream_count;
struct mixart_sample_pos streams[MIXART_MAX_STREAM_PER_CARD * MIXART_MAX_CARDS];
} __attribute__((packed));
/* MSG_CONSOLE_GET_CLOCK_UID = 0x070003,
*/
/* request is a uid with desc = MSG_CONSOLE_MANAGER | cardindex */
struct mixart_return_uid
{
u32 error_code;
struct mixart_uid uid;
} __attribute__((packed));
/* MSG_CLOCK_CHECK_PROPERTIES = 0x200001,
MSG_CLOCK_SET_PROPERTIES = 0x200002,
*/
enum mixart_clock_generic_type {
CGT_NO_CLOCK,
CGT_INTERNAL_CLOCK,
CGT_PROGRAMMABLE_CLOCK,
CGT_INTERNAL_ENSLAVED_CLOCK,
CGT_EXTERNAL_CLOCK,
CGT_CURRENT_CLOCK
};
enum mixart_clock_mode {
CM_UNDEFINED,
CM_MASTER,
CM_SLAVE,
CM_STANDALONE,
CM_NOT_CONCERNED
};
struct mixart_clock_properties
{
u32 error_code;
u32 validation_mask;
u32 frequency;
u32 reference_frequency;
u32 clock_generic_type;
u32 clock_mode;
struct mixart_uid uid_clock_source;
struct mixart_uid uid_event_source;
u32 event_mode;
u32 synchro_signal_presence;
u32 format;
u32 board_mask;
u32 nb_callers; /* set to 1 (see below) */
struct mixart_uid uid_caller[1];
} __attribute__((packed));
struct mixart_clock_properties_resp
{
u32 status;
u32 clock_mode;
} __attribute__((packed));
/* MSG_STREAM_SET_INPUT_STAGE_PARAM = 0x13000F */
/* MSG_STREAM_SET_OUTPUT_STAGE_PARAM = 0x130010 */
enum mixart_coding_type {
CT_NOT_DEFINED,
CT_LINEAR,
CT_MPEG_L1,
CT_MPEG_L2,
CT_MPEG_L3,
CT_MPEG_L3_LSF,
CT_GSM
};
enum mixart_sample_type {
ST_NOT_DEFINED,
ST_FLOATING_POINT_32BE,
ST_FLOATING_POINT_32LE,
ST_FLOATING_POINT_64BE,
ST_FLOATING_POINT_64LE,
ST_FIXED_POINT_8,
ST_FIXED_POINT_16BE,
ST_FIXED_POINT_16LE,
ST_FIXED_POINT_24BE,
ST_FIXED_POINT_24LE,
ST_FIXED_POINT_32BE,
ST_FIXED_POINT_32LE,
ST_INTEGER_8,
ST_INTEGER_16BE,
ST_INTEGER_16LE,
ST_INTEGER_24BE,
ST_INTEGER_24LE,
ST_INTEGER_32BE,
ST_INTEGER_32LE
};
struct mixart_stream_param_desc
{
u32 coding_type; /* use enum mixart_coding_type */
u32 sample_type; /* use enum mixart_sample_type */
union {
struct {
u32 linear_endian_ness;
u32 linear_bits;
u32 is_signed;
u32 is_float;
} linear_format_info;
struct {
u32 mpeg_layer;
u32 mpeg_mode;
u32 mpeg_mode_extension;
u32 mpeg_pre_emphasis;
u32 mpeg_has_padding_bit;
u32 mpeg_has_crc;
u32 mpeg_has_extension;
u32 mpeg_is_original;
u32 mpeg_has_copyright;
} mpeg_format_info;
} format_info;
u32 delayed;
u64 scheduler;
u32 sample_size;
u32 has_header;
u32 has_suffix;
u32 has_bitrate;
u32 samples_per_frame;
u32 bytes_per_frame;
u32 bytes_per_sample;
u32 sampling_freq;
u32 number_of_channel;
u32 stream_number;
u32 buffer_size;
u32 differed_time;
u32 reserved4np[3];
u32 pipe_count; /* set to 1 (array size !) */
u32 stream_count; /* set to 1 (array size !) */
struct mixart_txx_stream_desc stream_desc[1]; /* only one stream per command, but this could be an array */
} __attribute__((packed));
/* MSG_CONNECTOR_GET_OUT_AUDIO_LEVEL = 0x050009,
*/
struct mixart_get_out_audio_level
{
u32 txx_status;
u32 digital_level; /* float */
u32 analog_level; /* float */
u32 monitor_level; /* float */
u32 mute;
u32 monitor_mute1;
u32 monitor_mute2;
} __attribute__((packed));
/* MSG_CONNECTOR_SET_OUT_AUDIO_LEVEL = 0x05000A,
*/
/* used for valid_mask below */
#define MIXART_AUDIO_LEVEL_ANALOG_MASK 0x01
#define MIXART_AUDIO_LEVEL_DIGITAL_MASK 0x02
#define MIXART_AUDIO_LEVEL_MONITOR_MASK 0x04
#define MIXART_AUDIO_LEVEL_MUTE_MASK 0x08
#define MIXART_AUDIO_LEVEL_MUTE_M1_MASK 0x10
#define MIXART_AUDIO_LEVEL_MUTE_M2_MASK 0x20
struct mixart_set_out_audio_level
{
u32 delayed;
u64 scheduler;
u32 valid_mask1;
u32 valid_mask2;
u32 digital_level; /* float */
u32 analog_level; /* float */
u32 monitor_level; /* float */
u32 mute;
u32 monitor_mute1;
u32 monitor_mute2;
u32 reserved4np;
} __attribute__((packed));
/* MSG_SYSTEM_ENUM_PHYSICAL_IO = 0x16000E,
*/
#define MIXART_MAX_PHYS_IO (MIXART_MAX_CARDS * 2 * 2) /* 4 * (analog+digital) * (playback+capture) */
struct mixart_uid_enumeration
{
u32 error_code;
u32 first_uid_offset;
u32 nb_uid;
u32 current_uid_index;
struct mixart_uid uid[MIXART_MAX_PHYS_IO];
} __attribute__((packed));
/* MSG_PHYSICALIO_SET_LEVEL = 0x0F0008,
MSG_PHYSICALIO_GET_LEVEL = 0x0F000C,
*/
struct mixart_io_channel_level
{
u32 analog_level; /* float */
u32 unused[2];
} __attribute__((packed));
struct mixart_io_level
{
s32 channel; /* 0=left, 1=right, -1=both, -2=both same */
struct mixart_io_channel_level level[2];
} __attribute__((packed));
/* MSG_STREAM_SET_IN_AUDIO_LEVEL = 0x130015,
*/
struct mixart_in_audio_level_info
{
struct mixart_uid connector;
u32 valid_mask1;
u32 valid_mask2;
u32 digital_level;
u32 analog_level;
} __attribute__((packed));
struct mixart_set_in_audio_level_req
{
u32 delayed;
u64 scheduler;
u32 audio_count; /* set to <= 2 */
u32 reserved4np;
struct mixart_in_audio_level_info level[2];
} __attribute__((packed));
/* response is a 32 bit status */
/* MSG_STREAM_SET_OUT_STREAM_LEVEL = 0x130017,
*/
/* defines used for valid_mask1 */
#define MIXART_OUT_STREAM_SET_LEVEL_LEFT_AUDIO1 0x01
#define MIXART_OUT_STREAM_SET_LEVEL_LEFT_AUDIO2 0x02
#define MIXART_OUT_STREAM_SET_LEVEL_RIGHT_AUDIO1 0x04
#define MIXART_OUT_STREAM_SET_LEVEL_RIGHT_AUDIO2 0x08
#define MIXART_OUT_STREAM_SET_LEVEL_STREAM_1 0x10
#define MIXART_OUT_STREAM_SET_LEVEL_STREAM_2 0x20
#define MIXART_OUT_STREAM_SET_LEVEL_MUTE_1 0x40
#define MIXART_OUT_STREAM_SET_LEVEL_MUTE_2 0x80
struct mixart_out_stream_level_info
{
u32 valid_mask1;
u32 valid_mask2;
u32 left_to_out1_level;
u32 left_to_out2_level;
u32 right_to_out1_level;
u32 right_to_out2_level;
u32 digital_level1;
u32 digital_level2;
u32 mute1;
u32 mute2;
} __attribute__((packed));
struct mixart_set_out_stream_level
{
struct mixart_txx_stream_desc desc;
struct mixart_out_stream_level_info out_level;
} __attribute__((packed));
struct mixart_set_out_stream_level_req
{
u32 delayed;
u64 scheduler;
u32 reserved4np[2];
u32 nb_of_stream; /* set to 1 */
struct mixart_set_out_stream_level stream_level; /* could be an array */
} __attribute__((packed));
/* response to this request is a u32 status value */
/* exported */
void snd_mixart_init_mailbox(struct mixart_mgr *mgr);
void snd_mixart_exit_mailbox(struct mixart_mgr *mgr);
int snd_mixart_send_msg(struct mixart_mgr *mgr, struct mixart_msg *request, int max_resp_size, void *resp_data);
int snd_mixart_send_msg_wait_notif(struct mixart_mgr *mgr, struct mixart_msg *request, u32 notif_event);
int snd_mixart_send_msg_nonblock(struct mixart_mgr *mgr, struct mixart_msg *request);
irqreturn_t snd_mixart_interrupt(int irq, void *dev_id);
void snd_mixart_msg_tasklet(unsigned long arg);
void snd_mixart_reset_board(struct mixart_mgr *mgr);
#endif /* __SOUND_MIXART_CORE_H */
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