357 lines
9.3 KiB
C
357 lines
9.3 KiB
C
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/*
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* Written by Oron Peled <oron@actcom.co.il>
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* Copyright (C) 2004-2006, Xorcom
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*
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* All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*
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*/
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#ifndef XBUS_CORE_H
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#define XBUS_CORE_H
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#include <linux/wait.h>
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#include <linux/interrupt.h> /* for tasklets */
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#include <linux/kref.h>
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#include "xpd.h"
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#include "xframe_queue.h"
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#include "xbus-pcm.h"
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#define MAX_BUSES 32
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#define XFRAME_DATASIZE 512
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/* forward declarations */
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struct xbus_workqueue;
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#ifdef XPP_DEBUGFS
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struct debugfs_data;
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#endif
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#ifdef __KERNEL__
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struct xbus_ops {
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int (*xframe_send_pcm)(xbus_t *xbus, xframe_t *xframe);
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int (*xframe_send_cmd)(xbus_t *xbus, xframe_t *xframe);
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xframe_t *(*alloc_xframe)(xbus_t *xbus, gfp_t gfp_flags);
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void (*free_xframe)(xbus_t *xbus, xframe_t *xframe);
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};
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/*
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* XBUS statistics counters
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*/
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enum {
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XBUS_N_UNITS,
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XBUS_N_TX_XFRAME_PCM,
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XBUS_N_RX_XFRAME_PCM,
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XBUS_N_TX_PACK_PCM,
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XBUS_N_RX_PACK_PCM,
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XBUS_N_TX_BYTES,
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XBUS_N_RX_BYTES,
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XBUS_N_TX_PCM_FRAG,
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XBUS_N_RX_CMD,
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XBUS_N_TX_CMD,
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};
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#define XBUS_COUNTER(xbus, counter) ((xbus)->counters[XBUS_N_ ## counter])
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#define C_(x) [ XBUS_N_ ## x ] = { #x }
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/* yucky, make an instance so we can size it... */
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static struct xbus_counters {
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char *name;
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} xbus_counters[] = {
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C_(UNITS),
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C_(TX_XFRAME_PCM),
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C_(RX_XFRAME_PCM),
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C_(TX_PACK_PCM),
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C_(RX_PACK_PCM),
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C_(TX_BYTES),
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C_(RX_BYTES),
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C_(TX_PCM_FRAG),
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C_(RX_CMD),
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C_(TX_CMD),
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};
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#undef C_
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#define XBUS_COUNTER_MAX ARRAY_SIZE(xbus_counters)
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enum xbus_state {
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XBUS_STATE_START,
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XBUS_STATE_IDLE,
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XBUS_STATE_SENT_REQUEST,
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XBUS_STATE_RECVD_DESC,
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XBUS_STATE_READY,
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XBUS_STATE_DEACTIVATING,
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XBUS_STATE_DEACTIVATED,
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XBUS_STATE_FAIL,
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};
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const char *xbus_statename(enum xbus_state st);
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struct xbus_transport {
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struct xbus_ops *ops;
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void *priv;
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struct device *transport_device;
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ushort max_send_size;
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enum xbus_state xbus_state;
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unsigned long transport_flags;
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spinlock_t state_lock;
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atomic_t transport_refcount;
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wait_queue_head_t transport_unused;
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spinlock_t lock;
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};
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#define MAX_SEND_SIZE(xbus) ((xbus)->transport.max_send_size)
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#define XBUS_STATE(xbus) ((xbus)->transport.xbus_state)
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#define XBUS_IS(xbus, st) (XBUS_STATE(xbus) == XBUS_STATE_ ## st)
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#define TRANSPORT_EXIST(xbus) ((xbus)->transport.ops != NULL)
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#define XBUS_FLAG_CONNECTED 0
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#define XBUS_FLAGS(xbus, flg) test_bit(XBUS_FLAG_ ## flg, &((xbus)->transport.transport_flags))
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struct xbus_ops *transportops_get(xbus_t *xbus);
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void transportops_put(xbus_t *xbus);
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/*
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* Encapsulate all poll related data of a single xbus.
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*/
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struct xbus_workqueue {
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struct workqueue_struct *wq;
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struct work_struct xpds_init_work;
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bool xpds_init_done;
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struct list_head card_list;
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int num_units;
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int num_units_initialized;
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wait_queue_head_t wait_for_xpd_initialization;
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#ifdef CONFIG_PROC_FS
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#ifdef OLD_PROC
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struct proc_dir_entry *proc_xbus_waitfor_xpds;
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#endif
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#endif
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spinlock_t worker_lock;
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struct semaphore running_initialization;
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};
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/*
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* Allocate/Free an xframe from pools of empty xframes.
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* Calls to {get,put}_xframe are wrapped in
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* the macros bellow, so we take/return it
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* to the correct pool.
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*/
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xframe_t *get_xframe(struct xframe_queue *q);
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void put_xframe(struct xframe_queue *q, xframe_t *xframe);
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#define ALLOC_SEND_XFRAME(xbus) get_xframe(&(xbus)->send_pool)
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#define ALLOC_RECV_XFRAME(xbus) get_xframe(&(xbus)->receive_pool)
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#define FREE_SEND_XFRAME(xbus, xframe) put_xframe(&(xbus)->send_pool, (xframe))
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#define FREE_RECV_XFRAME(xbus, xframe) put_xframe(&(xbus)->receive_pool, (xframe))
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xbus_t *xbus_num(uint num);
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xbus_t *get_xbus(const char *msg, uint num);
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void put_xbus(const char *msg, xbus_t *xbus);
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int refcount_xbus(xbus_t *xbus);
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/*
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* An xbus is a transport layer for Xorcom Protocol commands
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*/
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struct xbus {
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char busname[XBUS_NAMELEN]; /* set by xbus_new() */
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/* low-level bus drivers set these 2 fields */
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char connector[XBUS_DESCLEN];
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char label[LABEL_SIZE];
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byte revision; /* Protocol revision */
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struct xbus_transport transport;
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int num;
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struct xpd *xpds[MAX_XPDS];
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int command_tick_counter;
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int usec_nosend; /* Firmware flow control */
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struct xframe_queue command_queue;
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wait_queue_head_t command_queue_empty;
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struct xframe_queue send_pool; /* empty xframes for send */
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struct xframe_queue receive_pool; /* empty xframes for receive */
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/* tasklet processing */
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struct xframe_queue receive_queue;
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struct tasklet_struct receive_tasklet;
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int cpu_rcv_intr[NR_CPUS];
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int cpu_rcv_tasklet[NR_CPUS];
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bool self_ticking;
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enum sync_mode sync_mode;
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/* Managed by low-level drivers: */
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enum sync_mode sync_mode_default;
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struct timer_list command_timer;
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unsigned int xbus_frag_count;
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struct xframe_queue pcm_tospan;
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struct xpp_ticker ticker; /* for tick rate */
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struct xpp_drift drift; /* for tick offset */
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atomic_t pcm_rx_counter;
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unsigned int global_counter;
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/* Device-Model */
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struct device astribank;
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#define dev_to_xbus(dev) container_of(dev, struct xbus, astribank)
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struct kref kref;
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#define kref_to_xbus(k) container_of(k, struct xbus, kref)
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spinlock_t lock;
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/* PCM metrics */
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struct timeval last_tx_sync;
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struct timeval last_rx_sync;
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unsigned long max_tx_sync;
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unsigned long min_tx_sync;
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unsigned long max_rx_sync;
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unsigned long min_rx_sync;
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unsigned long max_rx_process; /* packet processing time (usec) */
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#ifdef SAMPLE_TICKS
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#define SAMPLE_SIZE 1000
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int sample_ticks[SAMPLE_SIZE];
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bool sample_running;
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int sample_pos;
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#endif
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struct xbus_workqueue worker;
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/*
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* Sync adjustment
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*/
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int sync_adjustment;
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int sync_adjustment_offset;
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long pll_updated_at;
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atomic_t num_xpds;
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#ifdef XPP_DEBUGFS
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struct dentry *debugfs_dir;
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struct dentry *debugfs_file;
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struct debugfs_data *debugfs_data;
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#endif
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *proc_xbus_dir;
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struct proc_dir_entry *proc_xbus_summary;
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#ifdef PROTOCOL_DEBUG
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struct proc_dir_entry *proc_xbus_command;
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#endif
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#endif
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/* statistics */
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int counters[XBUS_COUNTER_MAX];
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};
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#endif
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#define XFRAME_MAGIC 123456L
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struct xframe {
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unsigned long xframe_magic;
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struct list_head frame_list;
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atomic_t frame_len;
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xbus_t *xbus;
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struct timeval tv_created;
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struct timeval tv_queued;
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struct timeval tv_submitted;
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struct timeval tv_received;
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/* filled by transport layer */
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size_t frame_maxlen;
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byte *packets; /* max XFRAME_DATASIZE */
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byte *first_free;
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int usec_towait; /* prevent overflowing AB */
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void *priv;
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};
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void xframe_init(xbus_t *xbus, xframe_t *xframe, void *buf, size_t maxsize, void *priv);
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#define XFRAME_LEN(frame) atomic_read(&(frame)->frame_len)
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int xbus_core_init(void); /* Initializer */
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void xbus_core_shutdown(void); /* Terminator */
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#ifdef XPP_DEBUGFS
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/* Debugfs handling */
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int xbus_log(xbus_t *xbus, xpd_t *xpd, int direction, const void *buf, unsigned long len);
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#endif
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/* Frame handling */
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void dump_xframe(const char msg[], const xbus_t *xbus, const xframe_t *xframe, int debug);
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int send_cmd_frame(xbus_t *xbus, xframe_t *xframe);
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/*
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* Return pointer to next packet slot in the frame
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* or NULL if the frame is full.
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*/
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xpacket_t *xframe_next_packet(xframe_t *xframe, int len);
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/* XBUS handling */
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/*
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* Map: unit+subunit <--> index in xbus->xpds[]
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*/
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#define XPD_IDX(unit,subunit) ((unit) * MAX_SUBUNIT + (subunit))
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#define XBUS_UNIT(idx) ((idx) / MAX_SUBUNIT)
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#define XBUS_SUBUNIT(idx) ((idx) % MAX_SUBUNIT)
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xpd_t *xpd_of(const xbus_t *xbus, int xpd_num);
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xpd_t *xpd_byaddr(const xbus_t *xbus, uint unit, uint subunit);
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int xbus_check_unique(xbus_t *xbus);
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bool xbus_setstate(xbus_t *xbus, enum xbus_state newstate);
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bool xbus_setflags(xbus_t *xbus, int flagbit, bool on);
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xbus_t *xbus_new(struct xbus_ops *ops, ushort max_send_size, struct device *transport_device, void *priv);
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void xbus_free(xbus_t *xbus);
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int xbus_connect(xbus_t *xbus);
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int xbus_activate(xbus_t *xbus);
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void xbus_deactivate(xbus_t *xbus);
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void xbus_disconnect(xbus_t *xbus);
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void xbus_receive_xframe(xbus_t *xbus, xframe_t *xframe);
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int xbus_process_worker(xbus_t *xbus);
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int waitfor_xpds(xbus_t *xbus, char *buf);
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int xbus_xpd_bind(xbus_t *xbus, xpd_t *xpd, int unit, int subunit);
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int xbus_xpd_unbind(xbus_t *xbus, xpd_t *xpd);
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/* sysfs */
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int xpd_device_register(xbus_t *xbus, xpd_t *xpd);
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void xpd_device_unregister(xpd_t *xpd);
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int xpp_driver_init(void);
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void xpp_driver_exit(void);
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int xbus_sysfs_transport_create(xbus_t *xbus);
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void xbus_sysfs_transport_remove(xbus_t *xbus);
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int xbus_sysfs_create(xbus_t *xbus);
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void xbus_sysfs_remove(xbus_t *xbus);
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#ifdef OLD_HOTPLUG_SUPPORT_269
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/* Copy from new kernels lib/kobject_uevent.c */
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enum kobject_action {
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KOBJ_ADD,
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KOBJ_REMOVE,
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KOBJ_CHANGE,
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KOBJ_MOUNT,
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KOBJ_UMOUNT,
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KOBJ_OFFLINE,
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KOBJ_ONLINE,
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};
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#endif
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void astribank_uevent_send(xbus_t *xbus, enum kobject_action act);
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#endif /* XBUS_CORE_H */
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