| /* |
| * $Id: musycc.c,v 2.1 2007/08/15 23:32:17 rickd PMCC4_3_1B $ |
| */ |
| |
| unsigned int max_intcnt = 0; |
| unsigned int max_bh = 0; |
| |
| /*----------------------------------------------------------------------------- |
| * musycc.c - |
| * |
| * Copyright (C) 2007 One Stop Systems, Inc. |
| * Copyright (C) 2003-2006 SBE, Inc. |
| * |
| * 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. |
| * |
| * For further information, contact via email: support@onestopsystems.com |
| * One Stop Systems, Inc. Escondido, California U.S.A. |
| *----------------------------------------------------------------------------- |
| * RCS info: |
| * RCS revision: $Revision: 2.1 $ |
| * Last changed on $Date: 2007/08/15 23:32:17 $ |
| * Changed by $Author: rickd $ |
| *----------------------------------------------------------------------------- |
| * $Log: musycc.c,v $ |
| * Revision 2.1 2007/08/15 23:32:17 rickd |
| * Use 'if 0' instead of GNU comment delimeter to avoid line wrap induced compiler errors. |
| * |
| * Revision 2.0 2007/08/15 22:13:20 rickd |
| * Update to printf pointer %p usage and correct some UINT to ULONG for |
| * 64bit comptibility. |
| * |
| * Revision 1.7 2006/04/21 00:56:40 rickd |
| * workqueue files now prefixed with <sbecom> prefix. |
| * |
| * Revision 1.6 2005/10/27 18:54:19 rickd |
| * Clean out old code. Default to HDLC_FCS16, not TRANS. |
| * |
| * Revision 1.5 2005/10/17 23:55:28 rickd |
| * Initial port of NCOMM support patches from original work found |
| * in pmc_c4t1e1 as updated by NCOMM. Ref: CONFIG_SBE_PMCC4_NCOMM. |
| * |
| * Revision 1.4 2005/10/13 20:35:25 rickd |
| * Cleanup warning for unused <flags> variable. |
| * |
| * Revision 1.3 2005/10/13 19:19:22 rickd |
| * Disable redundant driver removal cleanup code. |
| * |
| * Revision 1.2 2005/10/11 18:36:16 rickd |
| * Clean up warning messages caused by de-implemented some <flags> associated |
| * with spin_lock() removals. |
| * |
| * Revision 1.1 2005/10/05 00:45:28 rickd |
| * Re-enable xmit on flow-controlled and full channel to fix restart hang. |
| * Add some temp spin-lock debug code (rld_spin_owner). |
| * |
| * Revision 1.0 2005/09/28 00:10:06 rickd |
| * Initial release for C4T1E1 support. Lots of transparent |
| * mode updates. |
| * |
| *----------------------------------------------------------------------------- |
| */ |
| |
| char SBEid_pmcc4_musyccc[] = |
| "@(#)musycc.c - $Revision: 2.1 $ (c) Copyright 2004-2006 SBE, Inc."; |
| |
| #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| |
| #include <linux/types.h> |
| #include "pmcc4_sysdep.h" |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/init.h> |
| #include "sbecom_inline_linux.h" |
| #include "libsbew.h" |
| #include "pmcc4_private.h" |
| #include "pmcc4.h" |
| #include "musycc.h" |
| |
| #ifdef SBE_INCLUDE_SYMBOLS |
| #define STATIC |
| #else |
| #define STATIC static |
| #endif |
| |
| #define sd_find_chan(ci,ch) c4_find_chan(ch) |
| |
| |
| /*******************************************************************/ |
| /* global driver variables */ |
| extern ci_t *c4_list; |
| extern int drvr_state; |
| extern int log_level; |
| |
| extern int max_mru; |
| extern int max_mtu; |
| extern int max_rxdesc_used; |
| extern int max_txdesc_used; |
| extern ci_t *CI; /* dummy pointr to board ZEROE's data - DEBUG |
| * USAGE */ |
| |
| |
| /*******************************************************************/ |
| /* forward references */ |
| void c4_fifo_free (mpi_t *, int); |
| void c4_wk_chan_restart (mch_t *); |
| void musycc_bh_tx_eom (mpi_t *, int); |
| int musycc_chan_up (ci_t *, int); |
| status_t __init musycc_init (ci_t *); |
| STATIC void __init musycc_init_port (mpi_t *); |
| void musycc_intr_bh_tasklet (ci_t *); |
| void musycc_serv_req (mpi_t *, u_int32_t); |
| void musycc_update_timeslots (mpi_t *); |
| |
| /*******************************************************************/ |
| |
| #if 1 |
| STATIC int |
| musycc_dump_rxbuffer_ring (mch_t * ch, int lockit) |
| { |
| struct mdesc *m; |
| unsigned long flags = 0; |
| |
| u_int32_t status; |
| int n; |
| |
| if (lockit) |
| { |
| spin_lock_irqsave (&ch->ch_rxlock, flags); |
| } |
| if (ch->rxd_num == 0) |
| { |
| pr_info(" ZERO receive buffers allocated for this channel."); |
| } else |
| { |
| FLUSH_MEM_READ (); |
| m = &ch->mdr[ch->rxix_irq_srv]; |
| for (n = ch->rxd_num; n; n--) |
| { |
| status = le32_to_cpu (m->status); |
| { |
| pr_info("%c %08lx[%2d]: sts %08x (%c%c%c%c:%d.) Data [%08x] Next [%08x]\n", |
| (m == &ch->mdr[ch->rxix_irq_srv]) ? 'F' : ' ', |
| (unsigned long) m, n, |
| status, |
| m->data ? (status & HOST_RX_OWNED ? 'H' : 'M') : '-', |
| status & POLL_DISABLED ? 'P' : '-', |
| status & EOBIRQ_ENABLE ? 'b' : '-', |
| status & EOMIRQ_ENABLE ? 'm' : '-', |
| status & LENGTH_MASK, |
| le32_to_cpu (m->data), le32_to_cpu (m->next)); |
| #ifdef RLD_DUMP_BUFDATA |
| { |
| u_int32_t *dp; |
| int len = status & LENGTH_MASK; |
| |
| #if 1 |
| if (m->data && (status & HOST_RX_OWNED)) |
| #else |
| if (m->data) /* always dump regardless of valid RX |
| * data */ |
| #endif |
| { |
| dp = (u_int32_t *) OS_phystov ((void *) (le32_to_cpu (m->data))); |
| if (len >= 0x10) |
| pr_info(" %x[%x]: %08X %08X %08X %08x\n", (u_int32_t) dp, len, |
| *dp, *(dp + 1), *(dp + 2), *(dp + 3)); |
| else if (len >= 0x08) |
| pr_info(" %x[%x]: %08X %08X\n", (u_int32_t) dp, len, |
| *dp, *(dp + 1)); |
| else |
| pr_info(" %x[%x]: %08X\n", (u_int32_t) dp, len, *dp); |
| } |
| } |
| #endif |
| } |
| m = m->snext; |
| } |
| } /* -for- */ |
| pr_info("\n"); |
| |
| if (lockit) |
| { |
| spin_unlock_irqrestore (&ch->ch_rxlock, flags); |
| } |
| return 0; |
| } |
| #endif |
| |
| #if 1 |
| STATIC int |
| musycc_dump_txbuffer_ring (mch_t * ch, int lockit) |
| { |
| struct mdesc *m; |
| unsigned long flags = 0; |
| u_int32_t status; |
| int n; |
| |
| if (lockit) |
| { |
| spin_lock_irqsave (&ch->ch_txlock, flags); |
| } |
| if (ch->txd_num == 0) |
| { |
| pr_info(" ZERO transmit buffers allocated for this channel."); |
| } else |
| { |
| FLUSH_MEM_READ (); |
| m = ch->txd_irq_srv; |
| for (n = ch->txd_num; n; n--) |
| { |
| status = le32_to_cpu (m->status); |
| { |
| pr_info("%c%c %08lx[%2d]: sts %08x (%c%c%c%c:%d.) Data [%08x] Next [%08x]\n", |
| (m == ch->txd_usr_add) ? 'F' : ' ', |
| (m == ch->txd_irq_srv) ? 'L' : ' ', |
| (unsigned long) m, n, |
| status, |
| m->data ? (status & MUSYCC_TX_OWNED ? 'M' : 'H') : '-', |
| status & POLL_DISABLED ? 'P' : '-', |
| status & EOBIRQ_ENABLE ? 'b' : '-', |
| status & EOMIRQ_ENABLE ? 'm' : '-', |
| status & LENGTH_MASK, |
| le32_to_cpu (m->data), le32_to_cpu (m->next)); |
| #ifdef RLD_DUMP_BUFDATA |
| { |
| u_int32_t *dp; |
| int len = status & LENGTH_MASK; |
| |
| if (m->data) |
| { |
| dp = (u_int32_t *) OS_phystov ((void *) (le32_to_cpu (m->data))); |
| if (len >= 0x10) |
| pr_info(" %x[%x]: %08X %08X %08X %08x\n", (u_int32_t) dp, len, |
| *dp, *(dp + 1), *(dp + 2), *(dp + 3)); |
| else if (len >= 0x08) |
| pr_info(" %x[%x]: %08X %08X\n", (u_int32_t) dp, len, |
| *dp, *(dp + 1)); |
| else |
| pr_info(" %x[%x]: %08X\n", (u_int32_t) dp, len, *dp); |
| } |
| } |
| #endif |
| } |
| m = m->snext; |
| } |
| } /* -for- */ |
| pr_info("\n"); |
| |
| if (lockit) |
| { |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); |
| } |
| return 0; |
| } |
| #endif |
| |
| |
| /* |
| * The following supports a backdoor debug facility which can be used to |
| * display the state of a board's channel. |
| */ |
| |
| status_t |
| musycc_dump_ring (ci_t * ci, unsigned int chan) |
| { |
| mch_t *ch; |
| |
| if (chan >= MAX_CHANS_USED) |
| { |
| return SBE_DRVR_FAIL; /* E2BIG */ |
| } |
| { |
| int bh; |
| |
| bh = atomic_read (&ci->bh_pending); |
| pr_info(">> bh_pend %d [%d] ihead %d itail %d [%d] th_cnt %d bh_cnt %d wdcnt %d note %d\n", |
| bh, max_bh, ci->iqp_headx, ci->iqp_tailx, max_intcnt, |
| ci->intlog.drvr_intr_thcount, |
| ci->intlog.drvr_intr_bhcount, |
| ci->wdcount, ci->wd_notify); |
| max_bh = 0; /* reset counter */ |
| max_intcnt = 0; /* reset counter */ |
| } |
| |
| if (!(ch = sd_find_chan (dummy, chan))) |
| { |
| pr_info(">> musycc_dump_ring: channel %d not up.\n", chan); |
| return ENOENT; |
| } |
| pr_info(">> CI %p CHANNEL %3d @ %p: state %x status/p %x/%x\n", ci, chan, ch, ch->state, |
| ch->status, ch->p.status); |
| pr_info("--------------------------------\nTX Buffer Ring - Channel %d, txd_num %d. (bd/ch pend %d %d), TXD required %d, txpkt %lu\n", |
| chan, ch->txd_num, |
| (u_int32_t) atomic_read (&ci->tx_pending), (u_int32_t) atomic_read (&ch->tx_pending), ch->txd_required, ch->s.tx_packets); |
| pr_info("++ User 0x%p IRQ_SRV 0x%p USR_ADD 0x%p QStopped %x, start_tx %x tx_full %d txd_free %d mode %x\n", |
| ch->user, ch->txd_irq_srv, ch->txd_usr_add, |
| sd_queue_stopped (ch->user), |
| ch->ch_start_tx, ch->tx_full, ch->txd_free, ch->p.chan_mode); |
| musycc_dump_txbuffer_ring (ch, 1); |
| pr_info("RX Buffer Ring - Channel %d, rxd_num %d. IRQ_SRV[%d] 0x%p, start_rx %x rxpkt %lu\n", |
| chan, ch->rxd_num, ch->rxix_irq_srv, |
| &ch->mdr[ch->rxix_irq_srv], ch->ch_start_rx, ch->s.rx_packets); |
| musycc_dump_rxbuffer_ring (ch, 1); |
| |
| return SBE_DRVR_SUCCESS; |
| } |
| |
| |
| status_t |
| musycc_dump_rings (ci_t * ci, unsigned int start_chan) |
| { |
| unsigned int chan; |
| |
| for (chan = start_chan; chan < (start_chan + 5); chan++) |
| musycc_dump_ring (ci, chan); |
| return SBE_DRVR_SUCCESS; |
| } |
| |
| |
| /* |
| * NOTE on musycc_init_mdt(): These MUSYCC writes are only operational after |
| * a MUSYCC GROUP_INIT command has been issued. |
| */ |
| |
| void |
| musycc_init_mdt (mpi_t * pi) |
| { |
| u_int32_t *addr, cfg; |
| int i; |
| |
| /* |
| * This Idle Code insertion takes effect prior to channel's first |
| * transmitted message. After that, each message contains its own Idle |
| * Code information which is to be issued after the message is |
| * transmitted (Ref.MUSYCC 5.2.2.3: MCENBL bit in Group Configuration |
| * Descriptor). |
| */ |
| |
| addr = (u_int32_t *) ((u_long) pi->reg + MUSYCC_MDT_BASE03_ADDR); |
| cfg = CFG_CH_FLAG_7E << IDLE_CODE; |
| |
| for (i = 0; i < 32; addr++, i++) |
| { |
| pci_write_32 (addr, cfg); |
| } |
| } |
| |
| |
| /* Set TX thp to the next unprocessed md */ |
| |
| void |
| musycc_update_tx_thp (mch_t * ch) |
| { |
| struct mdesc *md; |
| unsigned long flags; |
| |
| spin_lock_irqsave (&ch->ch_txlock, flags); |
| while (1) |
| { |
| md = ch->txd_irq_srv; |
| FLUSH_MEM_READ (); |
| if (!md->data) |
| { |
| /* No MDs with buffers to process */ |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); |
| return; |
| } |
| if ((le32_to_cpu (md->status)) & MUSYCC_TX_OWNED) |
| { |
| /* this is the MD to restart TX with */ |
| break; |
| } |
| /* |
| * Otherwise, we have a valid, host-owned message descriptor which |
| * has been successfully transmitted and whose buffer can be freed, |
| * so... process this MD, it's owned by the host. (This might give |
| * as a new, updated txd_irq_srv.) |
| */ |
| musycc_bh_tx_eom (ch->up, ch->gchan); |
| } |
| md = ch->txd_irq_srv; |
| ch->up->regram->thp[ch->gchan] = cpu_to_le32 (OS_vtophys (md)); |
| FLUSH_MEM_WRITE (); |
| |
| if (ch->tx_full) |
| { |
| ch->tx_full = 0; |
| ch->txd_required = 0; |
| sd_enable_xmit (ch->user); /* re-enable to catch flow controlled |
| * channel */ |
| } |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); |
| |
| #ifdef RLD_TRANS_DEBUG |
| pr_info("++ musycc_update_tx_thp[%d]: setting thp = %p, sts %x\n", ch->channum, md, md->status); |
| #endif |
| } |
| |
| |
| /* |
| * This is the workq task executed by the OS when our queue_work() is |
| * scheduled and run. It can fire off either RX or TX ACTIVATION depending |
| * upon the channel's ch_start_tx and ch_start_rx variables. This routine |
| * is implemented as a work queue so that the call to the service request is |
| * able to sleep, awaiting an interrupt acknowledgment response (SACK) from |
| * the hardware. |
| */ |
| |
| void |
| musycc_wq_chan_restart (void *arg) /* channel private structure */ |
| { |
| mch_t *ch; |
| mpi_t *pi; |
| struct mdesc *md; |
| #if 0 |
| unsigned long flags; |
| #endif |
| |
| ch = container_of(arg, struct c4_chan_info, ch_work); |
| pi = ch->up; |
| |
| #ifdef RLD_TRANS_DEBUG |
| pr_info("wq_chan_restart[%d]: start_RT[%d/%d] status %x\n", |
| ch->channum, ch->ch_start_rx, ch->ch_start_tx, ch->status); |
| |
| #endif |
| |
| /**********************************/ |
| /** check for RX restart request **/ |
| /**********************************/ |
| |
| if ((ch->ch_start_rx) && (ch->status & RX_ENABLED)) |
| { |
| |
| ch->ch_start_rx = 0; |
| #if defined(RLD_TRANS_DEBUG) || defined(RLD_RXACT_DEBUG) |
| { |
| static int hereb4 = 7; |
| |
| if (hereb4) /* RLD DEBUG */ |
| { |
| hereb4--; |
| #ifdef RLD_TRANS_DEBUG |
| md = &ch->mdr[ch->rxix_irq_srv]; |
| pr_info("++ musycc_wq_chan_restart[%d] CHAN RX ACTIVATE: rxix_irq_srv %d, md %p sts %x, rxpkt %lu\n", |
| ch->channum, ch->rxix_irq_srv, md, le32_to_cpu (md->status), |
| ch->s.rx_packets); |
| #elif defined(RLD_RXACT_DEBUG) |
| md = &ch->mdr[ch->rxix_irq_srv]; |
| pr_info("++ musycc_wq_chan_restart[%d] CHAN RX ACTIVATE: rxix_irq_srv %d, md %p sts %x, rxpkt %lu\n", |
| ch->channum, ch->rxix_irq_srv, md, le32_to_cpu (md->status), |
| ch->s.rx_packets); |
| musycc_dump_rxbuffer_ring (ch, 1); /* RLD DEBUG */ |
| #endif |
| } |
| } |
| #endif |
| musycc_serv_req (pi, SR_CHANNEL_ACTIVATE | SR_RX_DIRECTION | ch->gchan); |
| } |
| /**********************************/ |
| /** check for TX restart request **/ |
| /**********************************/ |
| |
| if ((ch->ch_start_tx) && (ch->status & TX_ENABLED)) |
| { |
| /* find next unprocessed message, then set TX thp to it */ |
| musycc_update_tx_thp (ch); |
| |
| #if 0 |
| spin_lock_irqsave (&ch->ch_txlock, flags); |
| #endif |
| md = ch->txd_irq_srv; |
| if (!md) |
| { |
| #ifdef RLD_TRANS_DEBUG |
| pr_info("-- musycc_wq_chan_restart[%d]: WARNING, starting NULL md\n", ch->channum); |
| #endif |
| #if 0 |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); |
| #endif |
| } else if (md->data && ((le32_to_cpu (md->status)) & MUSYCC_TX_OWNED)) |
| { |
| ch->ch_start_tx = 0; |
| #if 0 |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); /* allow interrupts for service request */ |
| #endif |
| #ifdef RLD_TRANS_DEBUG |
| pr_info("++ musycc_wq_chan_restart() CHAN TX ACTIVATE: chan %d txd_irq_srv %p = sts %x, txpkt %lu\n", |
| ch->channum, ch->txd_irq_srv, ch->txd_irq_srv->status, ch->s.tx_packets); |
| #endif |
| musycc_serv_req (pi, SR_CHANNEL_ACTIVATE | SR_TX_DIRECTION | ch->gchan); |
| } |
| #ifdef RLD_RESTART_DEBUG |
| else |
| { |
| /* retain request to start until retried and we have data to xmit */ |
| pr_info("-- musycc_wq_chan_restart[%d]: DELAYED due to md %p sts %x data %x, start_tx %x\n", |
| ch->channum, md, |
| le32_to_cpu (md->status), |
| le32_to_cpu (md->data), ch->ch_start_tx); |
| musycc_dump_txbuffer_ring (ch, 0); |
| #if 0 |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); /* allow interrupts for service request */ |
| #endif |
| } |
| #endif |
| } |
| } |
| |
| |
| /* |
| * Channel restart either fires of a workqueue request (2.6) or lodges a |
| * watchdog activation sequence (2.4). |
| */ |
| |
| void |
| musycc_chan_restart (mch_t * ch) |
| { |
| #ifdef RLD_RESTART_DEBUG |
| pr_info("++ musycc_chan_restart[%d]: txd_irq_srv @ %p = sts %x\n", |
| ch->channum, ch->txd_irq_srv, ch->txd_irq_srv->status); |
| #endif |
| |
| /* 2.6 - find next unprocessed message, then set TX thp to it */ |
| #ifdef RLD_RESTART_DEBUG |
| pr_info(">> musycc_chan_restart: scheduling Chan %x workQ @ %p\n", ch->channum, &ch->ch_work); |
| #endif |
| c4_wk_chan_restart (ch); /* work queue mechanism fires off: Ref: |
| * musycc_wq_chan_restart () */ |
| |
| } |
| |
| |
| void |
| rld_put_led (mpi_t * pi, u_int32_t ledval) |
| { |
| static u_int32_t led = 0; |
| |
| if (ledval == 0) |
| led = 0; |
| else |
| led |= ledval; |
| |
| pci_write_32 ((u_int32_t *) &pi->up->cpldbase->leds, led); /* RLD DEBUG TRANHANG */ |
| } |
| |
| |
| #define MUSYCC_SR_RETRY_CNT 9 |
| |
| void |
| musycc_serv_req (mpi_t * pi, u_int32_t req) |
| { |
| volatile u_int32_t r; |
| int rcnt; |
| |
| /* |
| * PORT NOTE: Semaphore protect service loop guarantees only a single |
| * operation at a time. Per MUSYCC Manual - "Issuing service requests to |
| * the same channel group without first receiving ACK from each request |
| * may cause the host to lose track of which service request has been |
| * acknowledged." |
| */ |
| |
| SD_SEM_TAKE (&pi->sr_sem_busy, "serv"); /* only 1 thru here, per |
| * group */ |
| |
| if (pi->sr_last == req) |
| { |
| #ifdef RLD_TRANS_DEBUG |
| pr_info(">> same SR, Port %d Req %x\n", pi->portnum, req); |
| #endif |
| |
| /* |
| * The most likely repeated request is the channel activation command |
| * which follows the occurrence of a Transparent mode TX ONR or a |
| * BUFF error. If the previous command was a CHANNEL ACTIVATE, |
| * precede it with a NOOP command in order maintain coherent control |
| * of this current (re)ACTIVATE. |
| */ |
| |
| r = (pi->sr_last & ~SR_GCHANNEL_MASK); |
| if ((r == (SR_CHANNEL_ACTIVATE | SR_TX_DIRECTION)) || |
| (r == (SR_CHANNEL_ACTIVATE | SR_RX_DIRECTION))) |
| { |
| #ifdef RLD_TRANS_DEBUG |
| pr_info(">> same CHAN ACT SR, Port %d Req %x => issue SR_NOOP CMD\n", pi->portnum, req); |
| #endif |
| SD_SEM_GIVE (&pi->sr_sem_busy); /* allow this next request */ |
| musycc_serv_req (pi, SR_NOOP); |
| SD_SEM_TAKE (&pi->sr_sem_busy, "serv"); /* relock & continue w/ |
| * original req */ |
| } else if (req == SR_NOOP) |
| { |
| /* no need to issue back-to-back SR_NOOP commands at this time */ |
| #ifdef RLD_TRANS_DEBUG |
| pr_info(">> same Port SR_NOOP skipped, Port %d\n", pi->portnum); |
| #endif |
| SD_SEM_GIVE (&pi->sr_sem_busy); /* allow this next request */ |
| return; |
| } |
| } |
| rcnt = 0; |
| pi->sr_last = req; |
| rewrite: |
| pci_write_32 ((u_int32_t *) &pi->reg->srd, req); |
| FLUSH_MEM_WRITE (); |
| |
| /* |
| * Per MUSYCC Manual, Section 6.1,2 - "When writing an SCR service |
| * request, the host must ensure at least one PCI bus clock cycle has |
| * elapsed before writing another service request. To meet this minimum |
| * elapsed service request write timing interval, it is recommended that |
| * the host follow any SCR write with another operation which reads from |
| * the same address." |
| */ |
| r = pci_read_32 ((u_int32_t *) &pi->reg->srd); /* adhere to write |
| * timing imposition */ |
| |
| |
| if ((r != req) && (req != SR_CHIP_RESET) && (++rcnt <= MUSYCC_SR_RETRY_CNT)) |
| { |
| if (log_level >= LOG_MONITOR) |
| pr_info("%s: %d - reissue srv req/last %x/%x (hdw reads %x), Chan %d.\n", |
| pi->up->devname, rcnt, req, pi->sr_last, r, |
| (pi->portnum * MUSYCC_NCHANS) + (req & 0x1f)); |
| OS_uwait_dummy (); /* this delay helps reduce reissue counts |
| * (reason not yet researched) */ |
| goto rewrite; |
| } |
| if (rcnt > MUSYCC_SR_RETRY_CNT) |
| { |
| pr_warning("%s: failed service request (#%d)= %x, group %d.\n", |
| pi->up->devname, MUSYCC_SR_RETRY_CNT, req, pi->portnum); |
| SD_SEM_GIVE (&pi->sr_sem_busy); /* allow any next request */ |
| return; |
| } |
| if (req == SR_CHIP_RESET) |
| { |
| /* |
| * PORT NOTE: the CHIP_RESET command is NOT ack'd by the MUSYCC, thus |
| * the upcoming delay is used. Though the MUSYCC documentation |
| * suggests a read-after-write would supply the required delay, it's |
| * unclear what CPU/BUS clock speeds might have been assumed when |
| * suggesting this 'lack of ACK' workaround. Thus the use of uwait. |
| */ |
| OS_uwait (100000, "icard"); /* 100ms */ |
| } else |
| { |
| FLUSH_MEM_READ (); |
| SD_SEM_TAKE (&pi->sr_sem_wait, "sakack"); /* sleep until SACK |
| * interrupt occurs */ |
| } |
| SD_SEM_GIVE (&pi->sr_sem_busy); /* allow any next request */ |
| } |
| |
| |
| #ifdef SBE_PMCC4_ENABLE |
| void |
| musycc_update_timeslots (mpi_t * pi) |
| { |
| int i, ch; |
| char e1mode = IS_FRAME_ANY_E1 (pi->p.port_mode); |
| |
| for (i = 0; i < 32; i++) |
| { |
| int usedby = 0, last = 0, ts, j, bits[8]; |
| |
| u_int8_t lastval = 0; |
| |
| if (((i == 0) && e1mode) || /* disable if E1 mode */ |
| ((i == 16) && ((pi->p.port_mode == CFG_FRAME_E1CRC_CAS) || (pi->p.port_mode == CFG_FRAME_E1CRC_CAS_AMI))) |
| || ((i > 23) && (!e1mode))) /* disable if T1 mode */ |
| { |
| pi->tsm[i] = 0xff; /* make tslot unavailable for this mode */ |
| } else |
| { |
| pi->tsm[i] = 0x00; /* make tslot available for assignment */ |
| } |
| for (j = 0; j < 8; j++) |
| bits[j] = -1; |
| for (ch = 0; ch < MUSYCC_NCHANS; ch++) |
| { |
| if ((pi->chan[ch]->state == UP) && (pi->chan[ch]->p.bitmask[i])) |
| { |
| usedby++; |
| last = ch; |
| lastval = pi->chan[ch]->p.bitmask[i]; |
| for (j = 0; j < 8; j++) |
| if (lastval & (1 << j)) |
| bits[j] = ch; |
| pi->tsm[i] |= lastval; |
| } |
| } |
| if (!usedby) |
| ts = 0; |
| else if ((usedby == 1) && (lastval == 0xff)) |
| ts = (4 << 5) | last; |
| else if ((usedby == 1) && (lastval == 0x7f)) |
| ts = (5 << 5) | last; |
| else |
| { |
| int idx; |
| |
| if (bits[0] < 0) |
| ts = (6 << 5) | (idx = last); |
| else |
| ts = (7 << 5) | (idx = bits[0]); |
| for (j = 1; j < 8; j++) |
| { |
| pi->regram->rscm[idx * 8 + j] = (bits[j] < 0) ? 0 : (0x80 | bits[j]); |
| pi->regram->tscm[idx * 8 + j] = (bits[j] < 0) ? 0 : (0x80 | bits[j]); |
| } |
| } |
| pi->regram->rtsm[i] = ts; |
| pi->regram->ttsm[i] = ts; |
| } |
| FLUSH_MEM_WRITE (); |
| |
| musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_RX_DIRECTION); |
| musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_TX_DIRECTION); |
| musycc_serv_req (pi, SR_SUBCHANNEL_MAP | SR_RX_DIRECTION); |
| musycc_serv_req (pi, SR_SUBCHANNEL_MAP | SR_TX_DIRECTION); |
| } |
| #endif |
| |
| |
| #ifdef SBE_WAN256T3_ENABLE |
| void |
| musycc_update_timeslots (mpi_t * pi) |
| { |
| mch_t *ch; |
| |
| u_int8_t ts, hmask, tsen; |
| int gchan; |
| int i; |
| |
| #ifdef SBE_PMCC4_ENABLE |
| hmask = (0x1f << pi->up->p.hypersize) & 0x1f; |
| #endif |
| #ifdef SBE_WAN256T3_ENABLE |
| hmask = (0x1f << hyperdummy) & 0x1f; |
| #endif |
| for (i = 0; i < 128; i++) |
| { |
| gchan = ((pi->portnum * MUSYCC_NCHANS) + (i & hmask)) % MUSYCC_NCHANS; |
| ch = pi->chan[gchan]; |
| if (ch->p.mode_56k) |
| tsen = MODE_56KBPS; |
| else |
| tsen = MODE_64KBPS; /* also the default */ |
| ts = ((pi->portnum % 4) == (i / 32)) ? (tsen << 5) | (i & hmask) : 0; |
| pi->regram->rtsm[i] = ts; |
| pi->regram->ttsm[i] = ts; |
| } |
| FLUSH_MEM_WRITE (); |
| musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_RX_DIRECTION); |
| musycc_serv_req (pi, SR_TIMESLOT_MAP | SR_TX_DIRECTION); |
| } |
| #endif |
| |
| |
| /* |
| * This routine converts a generic library channel configuration parameter |
| * into a hardware specific register value (IE. MUSYCC CCD Register). |
| */ |
| u_int32_t |
| musycc_chan_proto (int proto) |
| { |
| int reg; |
| |
| switch (proto) |
| { |
| case CFG_CH_PROTO_TRANS: /* 0 */ |
| reg = MUSYCC_CCD_TRANS; |
| break; |
| case CFG_CH_PROTO_SS7: /* 1 */ |
| reg = MUSYCC_CCD_SS7; |
| break; |
| default: |
| case CFG_CH_PROTO_ISLP_MODE: /* 4 */ |
| case CFG_CH_PROTO_HDLC_FCS16: /* 2 */ |
| reg = MUSYCC_CCD_HDLC_FCS16; |
| break; |
| case CFG_CH_PROTO_HDLC_FCS32: /* 3 */ |
| reg = MUSYCC_CCD_HDLC_FCS32; |
| break; |
| } |
| |
| return reg; |
| } |
| |
| #ifdef SBE_WAN256T3_ENABLE |
| STATIC void __init |
| musycc_init_port (mpi_t * pi) |
| { |
| pci_write_32 ((u_int32_t *) &pi->reg->gbp, OS_vtophys (pi->regram)); |
| |
| pi->regram->grcd = |
| __constant_cpu_to_le32 (MUSYCC_GRCD_RX_ENABLE | |
| MUSYCC_GRCD_TX_ENABLE | |
| MUSYCC_GRCD_SF_ALIGN | |
| MUSYCC_GRCD_SUBCHAN_DISABLE | |
| MUSYCC_GRCD_OOFMP_DISABLE | |
| MUSYCC_GRCD_COFAIRQ_DISABLE | |
| MUSYCC_GRCD_MC_ENABLE | |
| (MUSYCC_GRCD_POLLTH_32 << MUSYCC_GRCD_POLLTH_SHIFT)); |
| |
| pi->regram->pcd = |
| __constant_cpu_to_le32 (MUSYCC_PCD_E1X4_MODE | |
| MUSYCC_PCD_TXDATA_RISING | |
| MUSYCC_PCD_TX_DRIVEN); |
| |
| /* Message length descriptor */ |
| pi->regram->mld = __constant_cpu_to_le32 (max_mru | (max_mru << 16)); |
| FLUSH_MEM_WRITE (); |
| |
| musycc_serv_req (pi, SR_GROUP_INIT | SR_RX_DIRECTION); |
| musycc_serv_req (pi, SR_GROUP_INIT | SR_TX_DIRECTION); |
| |
| musycc_init_mdt (pi); |
| |
| musycc_update_timeslots (pi); |
| } |
| #endif |
| |
| |
| status_t __init |
| musycc_init (ci_t * ci) |
| { |
| char *regaddr; /* temp for address boundary calculations */ |
| int i, gchan; |
| |
| OS_sem_init (&ci->sem_wdbusy, SEM_AVAILABLE); /* watchdog exclusion */ |
| |
| /* |
| * Per MUSYCC manual, Section 6.3.4 - "The host must allocate a dword |
| * aligned memory segment for interrupt queue pointers." |
| */ |
| |
| #define INT_QUEUE_BOUNDARY 4 |
| |
| regaddr = OS_kmalloc ((INT_QUEUE_SIZE + 1) * sizeof (u_int32_t)); |
| if (regaddr == 0) |
| return ENOMEM; |
| ci->iqd_p_saved = regaddr; /* save orig value for free's usage */ |
| ci->iqd_p = (u_int32_t *) ((unsigned long) (regaddr + INT_QUEUE_BOUNDARY - 1) & |
| (~(INT_QUEUE_BOUNDARY - 1))); /* this calculates |
| * closest boundary */ |
| |
| for (i = 0; i < INT_QUEUE_SIZE; i++) |
| { |
| ci->iqd_p[i] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY); |
| } |
| |
| for (i = 0; i < ci->max_port; i++) |
| { |
| mpi_t *pi = &ci->port[i]; |
| |
| /* |
| * Per MUSYCC manual, Section 6.3.2 - "The host must allocate a 2KB |
| * bound memory segment for Channel Group 0." |
| */ |
| |
| #define GROUP_BOUNDARY 0x800 |
| |
| regaddr = OS_kmalloc (sizeof (struct musycc_groupr) + GROUP_BOUNDARY); |
| if (regaddr == 0) |
| { |
| for (gchan = 0; gchan < i; gchan++) |
| { |
| pi = &ci->port[gchan]; |
| OS_kfree (pi->reg); |
| pi->reg = 0; |
| } |
| return ENOMEM; |
| } |
| pi->regram_saved = regaddr; /* save orig value for free's usage */ |
| pi->regram = (struct musycc_groupr *) ((unsigned long) (regaddr + GROUP_BOUNDARY - 1) & |
| (~(GROUP_BOUNDARY - 1))); /* this calculates |
| * closest boundary */ |
| } |
| |
| /* any board centric MUSYCC commands will use group ZERO as its "home" */ |
| ci->regram = ci->port[0].regram; |
| musycc_serv_req (&ci->port[0], SR_CHIP_RESET); |
| |
| pci_write_32 ((u_int32_t *) &ci->reg->gbp, OS_vtophys (ci->regram)); |
| pci_flush_write (ci); |
| #ifdef CONFIG_SBE_PMCC4_NCOMM |
| ci->regram->__glcd = __constant_cpu_to_le32 (GCD_MAGIC); |
| #else |
| /* standard driver POLLS for INTB via CPLD register */ |
| ci->regram->__glcd = __constant_cpu_to_le32 (GCD_MAGIC | MUSYCC_GCD_INTB_DISABLE); |
| #endif |
| |
| ci->regram->__iqp = cpu_to_le32 (OS_vtophys (&ci->iqd_p[0])); |
| ci->regram->__iql = __constant_cpu_to_le32 (INT_QUEUE_SIZE - 1); |
| pci_write_32 ((u_int32_t *) &ci->reg->dacbp, 0); |
| FLUSH_MEM_WRITE (); |
| |
| ci->state = C_RUNNING; /* mark as full interrupt processing |
| * available */ |
| |
| musycc_serv_req (&ci->port[0], SR_GLOBAL_INIT); /* FIRST INTERRUPT ! */ |
| |
| /* sanity check settable parameters */ |
| |
| if (max_mru > 0xffe) |
| { |
| pr_warning("Maximum allowed MRU exceeded, resetting %d to %d.\n", |
| max_mru, 0xffe); |
| max_mru = 0xffe; |
| } |
| if (max_mtu > 0xffe) |
| { |
| pr_warning("Maximum allowed MTU exceeded, resetting %d to %d.\n", |
| max_mtu, 0xffe); |
| max_mtu = 0xffe; |
| } |
| #ifdef SBE_WAN256T3_ENABLE |
| for (i = 0; i < MUSYCC_NPORTS; i++) |
| musycc_init_port (&ci->port[i]); |
| #endif |
| |
| return SBE_DRVR_SUCCESS; /* no error */ |
| } |
| |
| |
| void |
| musycc_bh_tx_eom (mpi_t * pi, int gchan) |
| { |
| mch_t *ch; |
| struct mdesc *md; |
| |
| #if 0 |
| #ifndef SBE_ISR_INLINE |
| unsigned long flags; |
| |
| #endif |
| #endif |
| volatile u_int32_t status; |
| |
| ch = pi->chan[gchan]; |
| if (ch == 0 || ch->state != UP) |
| { |
| if (log_level >= LOG_ERROR) |
| pr_info("%s: intr: xmit EOM on uninitialized channel %d\n", |
| pi->up->devname, gchan); |
| } |
| if (ch == 0 || ch->mdt == 0) |
| return; /* note: mdt==0 implies a malloc() |
| * failure w/in chan_up() routine */ |
| |
| #if 0 |
| #ifdef SBE_ISR_INLINE |
| spin_lock_irq (&ch->ch_txlock); |
| #else |
| spin_lock_irqsave (&ch->ch_txlock, flags); |
| #endif |
| #endif |
| do |
| { |
| FLUSH_MEM_READ (); |
| md = ch->txd_irq_srv; |
| status = le32_to_cpu (md->status); |
| |
| /* |
| * Note: Per MUSYCC Ref 6.4.9, the host does not poll a host-owned |
| * Transmit Buffer Descriptor during Transparent Mode. |
| */ |
| if (status & MUSYCC_TX_OWNED) |
| { |
| int readCount, loopCount; |
| |
| /***********************************************************/ |
| /* HW Bug Fix */ |
| /* ---------- */ |
| /* Under certain PCI Bus loading conditions, the data */ |
| /* associated with an update of Shared Memory is delayed */ |
| /* relative to its PCI Interrupt. This is caught when */ |
| /* the host determines it does not yet OWN the descriptor. */ |
| /***********************************************************/ |
| |
| readCount = 0; |
| while (status & MUSYCC_TX_OWNED) |
| { |
| for (loopCount = 0; loopCount < 0x30; loopCount++) |
| OS_uwait_dummy (); /* use call to avoid optimization |
| * removal of dummy delay */ |
| FLUSH_MEM_READ (); |
| status = le32_to_cpu (md->status); |
| if (readCount++ > 40) |
| break; /* don't wait any longer */ |
| } |
| if (status & MUSYCC_TX_OWNED) |
| { |
| if (log_level >= LOG_MONITOR) |
| { |
| pr_info("%s: Port %d Chan %2d - unexpected TX msg ownership intr (md %p sts %x)\n", |
| pi->up->devname, pi->portnum, ch->channum, |
| md, status); |
| pr_info("++ User 0x%p IRQ_SRV 0x%p USR_ADD 0x%p QStopped %x, start_tx %x tx_full %d txd_free %d mode %x\n", |
| ch->user, ch->txd_irq_srv, ch->txd_usr_add, |
| sd_queue_stopped (ch->user), |
| ch->ch_start_tx, ch->tx_full, ch->txd_free, ch->p.chan_mode); |
| musycc_dump_txbuffer_ring (ch, 0); |
| } |
| break; /* Not our mdesc, done */ |
| } else |
| { |
| if (log_level >= LOG_MONITOR) |
| pr_info("%s: Port %d Chan %2d - recovered TX msg ownership [%d] (md %p sts %x)\n", |
| pi->up->devname, pi->portnum, ch->channum, readCount, md, status); |
| } |
| } |
| ch->txd_irq_srv = md->snext; |
| |
| md->data = 0; |
| if (md->mem_token != 0) |
| { |
| /* upcount channel */ |
| atomic_sub (OS_mem_token_tlen (md->mem_token), &ch->tx_pending); |
| /* upcount card */ |
| atomic_sub (OS_mem_token_tlen (md->mem_token), &pi->up->tx_pending); |
| #ifdef SBE_WAN256T3_ENABLE |
| if (!atomic_read (&pi->up->tx_pending)) |
| wan256t3_led (pi->up, LED_TX, 0); |
| #endif |
| |
| #ifdef CONFIG_SBE_WAN256T3_NCOMM |
| /* callback that our packet was sent */ |
| { |
| int hdlcnum = (pi->portnum * 32 + gchan); |
| |
| if (hdlcnum >= 228) |
| { |
| if (nciProcess_TX_complete) |
| (*nciProcess_TX_complete) (hdlcnum, |
| getuserbychan (gchan)); |
| } |
| } |
| #endif /*** CONFIG_SBE_WAN256T3_NCOMM ***/ |
| |
| OS_mem_token_free_irq (md->mem_token); |
| md->mem_token = 0; |
| } |
| md->status = 0; |
| #ifdef RLD_TXFULL_DEBUG |
| if (log_level >= LOG_MONITOR2) |
| pr_info("~~ tx_eom: tx_full %x txd_free %d -> %d\n", |
| ch->tx_full, ch->txd_free, ch->txd_free + 1); |
| #endif |
| ++ch->txd_free; |
| FLUSH_MEM_WRITE (); |
| |
| if ((ch->p.chan_mode != CFG_CH_PROTO_TRANS) && (status & EOBIRQ_ENABLE)) |
| { |
| if (log_level >= LOG_MONITOR) |
| pr_info("%s: Mode (%x) incorrect EOB status (%x)\n", |
| pi->up->devname, ch->p.chan_mode, status); |
| if ((status & EOMIRQ_ENABLE) == 0) |
| break; |
| } |
| } |
| while ((ch->p.chan_mode != CFG_CH_PROTO_TRANS) && ((status & EOMIRQ_ENABLE) == 0)); |
| /* |
| * NOTE: (The above 'while' is coupled w/ previous 'do', way above.) Each |
| * Transparent data buffer has the EOB bit, and NOT the EOM bit, set and |
| * will furthermore have a separate IQD associated with each messages |
| * buffer. |
| */ |
| |
| FLUSH_MEM_READ (); |
| /* |
| * Smooth flow control hysterisis by maintaining task stoppage until half |
| * the available write buffers are available. |
| */ |
| if (ch->tx_full && (ch->txd_free >= (ch->txd_num / 2))) |
| { |
| /* |
| * Then, only releave task stoppage if we actually have enough |
| * buffers to service the last requested packet. It may require MORE |
| * than half the available! |
| */ |
| if (ch->txd_free >= ch->txd_required) |
| { |
| |
| #ifdef RLD_TXFULL_DEBUG |
| if (log_level >= LOG_MONITOR2) |
| pr_info("tx_eom[%d]: enable xmit tx_full no more, txd_free %d txd_num/2 %d\n", |
| ch->channum, |
| ch->txd_free, ch->txd_num / 2); |
| #endif |
| ch->tx_full = 0; |
| ch->txd_required = 0; |
| sd_enable_xmit (ch->user); /* re-enable to catch flow controlled |
| * channel */ |
| } |
| } |
| #ifdef RLD_TXFULL_DEBUG |
| else if (ch->tx_full) |
| { |
| if (log_level >= LOG_MONITOR2) |
| pr_info("tx_eom[%d]: bypass TX enable though room available? (txd_free %d txd_num/2 %d)\n", |
| ch->channum, |
| ch->txd_free, ch->txd_num / 2); |
| } |
| #endif |
| |
| FLUSH_MEM_WRITE (); |
| #if 0 |
| #ifdef SBE_ISR_INLINE |
| spin_unlock_irq (&ch->ch_txlock); |
| #else |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); |
| #endif |
| #endif |
| } |
| |
| |
| STATIC void |
| musycc_bh_rx_eom (mpi_t * pi, int gchan) |
| { |
| mch_t *ch; |
| void *m, *m2; |
| struct mdesc *md; |
| volatile u_int32_t status; |
| u_int32_t error; |
| |
| ch = pi->chan[gchan]; |
| if (ch == 0 || ch->state != UP) |
| { |
| if (log_level > LOG_ERROR) |
| pr_info("%s: intr: receive EOM on uninitialized channel %d\n", |
| pi->up->devname, gchan); |
| return; |
| } |
| if (ch->mdr == 0) |
| return; /* can this happen ? */ |
| |
| for (;;) |
| { |
| FLUSH_MEM_READ (); |
| md = &ch->mdr[ch->rxix_irq_srv]; |
| status = le32_to_cpu (md->status); |
| if (!(status & HOST_RX_OWNED)) |
| break; /* Not our mdesc, done */ |
| m = md->mem_token; |
| error = (status >> 16) & 0xf; |
| if (error == 0) |
| { |
| #ifdef CONFIG_SBE_WAN256T3_NCOMM |
| int hdlcnum = (pi->portnum * 32 + gchan); |
| |
| /* |
| * if the packet number belongs to NCOMM, then send it to the TMS |
| * driver |
| */ |
| if (hdlcnum >= 228) |
| { |
| if (nciProcess_RX_packet) |
| (*nciProcess_RX_packet) (hdlcnum, status & 0x3fff, m, ch->user); |
| } else |
| #endif /*** CONFIG_SBE_WAN256T3_NCOMM ***/ |
| |
| { |
| if ((m2 = OS_mem_token_alloc (max_mru))) |
| { |
| /* substitute the mbuf+cluster */ |
| md->mem_token = m2; |
| md->data = cpu_to_le32 (OS_vtophys (OS_mem_token_data (m2))); |
| |
| /* pass the received mbuf upward */ |
| sd_recv_consume (m, status & LENGTH_MASK, ch->user); |
| ch->s.rx_packets++; |
| ch->s.rx_bytes += status & LENGTH_MASK; |
| } else |
| { |
| ch->s.rx_dropped++; |
| } |
| } |
| } else if (error == ERR_FCS) |
| { |
| ch->s.rx_crc_errors++; |
| } else if (error == ERR_ALIGN) |
| { |
| ch->s.rx_missed_errors++; |
| } else if (error == ERR_ABT) |
| { |
| ch->s.rx_missed_errors++; |
| } else if (error == ERR_LNG) |
| { |
| ch->s.rx_length_errors++; |
| } else if (error == ERR_SHT) |
| { |
| ch->s.rx_length_errors++; |
| } |
| FLUSH_MEM_WRITE (); |
| status = max_mru; |
| if (ch->p.chan_mode == CFG_CH_PROTO_TRANS) |
| status |= EOBIRQ_ENABLE; |
| md->status = cpu_to_le32 (status); |
| |
| /* Check next mdesc in the ring */ |
| if (++ch->rxix_irq_srv >= ch->rxd_num) |
| ch->rxix_irq_srv = 0; |
| FLUSH_MEM_WRITE (); |
| } |
| } |
| |
| |
| irqreturn_t |
| musycc_intr_th_handler (void *devp) |
| { |
| ci_t *ci = (ci_t *) devp; |
| volatile u_int32_t status, currInt = 0; |
| u_int32_t nextInt, intCnt; |
| |
| /* |
| * Hardware not available, potential interrupt hang. But since interrupt |
| * might be shared, just return. |
| */ |
| if (ci->state == C_INIT) |
| { |
| return IRQ_NONE; |
| } |
| /* |
| * Marked as hardware available. Don't service interrupts, just clear the |
| * event. |
| */ |
| |
| if (ci->state == C_IDLE) |
| { |
| status = pci_read_32 ((u_int32_t *) &ci->reg->isd); |
| |
| /* clear the interrupt but process nothing else */ |
| pci_write_32 ((u_int32_t *) &ci->reg->isd, status); |
| return IRQ_HANDLED; |
| } |
| FLUSH_PCI_READ (); |
| FLUSH_MEM_READ (); |
| |
| status = pci_read_32 ((u_int32_t *) &ci->reg->isd); |
| nextInt = INTRPTS_NEXTINT (status); |
| intCnt = INTRPTS_INTCNT (status); |
| ci->intlog.drvr_intr_thcount++; |
| |
| /*********************************************************/ |
| /* HW Bug Fix */ |
| /* ---------- */ |
| /* Under certain PCI Bus loading conditions, the */ |
| /* MUSYCC looses the data associated with an update */ |
| /* of its ISD and erroneously returns the immediately */ |
| /* preceding 'nextInt' value. However, the 'intCnt' */ |
| /* value appears to be correct. By not starting service */ |
| /* where the 'missing' 'nextInt' SHOULD point causes */ |
| /* the IQD not to be serviced - the 'not serviced' */ |
| /* entries then remain and continue to increase as more */ |
| /* incorrect ISD's are encountered. */ |
| /*********************************************************/ |
| |
| if (nextInt != INTRPTS_NEXTINT (ci->intlog.this_status_new)) |
| { |
| if (log_level >= LOG_MONITOR) |
| { |
| pr_info("%s: note - updated ISD from %08x to %08x\n", |
| ci->devname, status, |
| (status & (~INTRPTS_NEXTINT_M)) | ci->intlog.this_status_new); |
| } |
| /* |
| * Replace bogus status with software corrected value. |
| * |
| * It's not known whether, during this problem occurrence, if the |
| * INTFULL bit is correctly reported or not. |
| */ |
| status = (status & (~INTRPTS_NEXTINT_M)) | (ci->intlog.this_status_new); |
| nextInt = INTRPTS_NEXTINT (status); |
| } |
| /**********************************************/ |
| /* Cn847x Bug Fix */ |
| /* -------------- */ |
| /* Fix for inability to write back same index */ |
| /* as read for a full interrupt queue. */ |
| /**********************************************/ |
| |
| if (intCnt == INT_QUEUE_SIZE) |
| { |
| currInt = ((intCnt - 1) + nextInt) & (INT_QUEUE_SIZE - 1); |
| } else |
| /************************************************/ |
| /* Interrupt Write Location Issues */ |
| /* ------------------------------- */ |
| /* When the interrupt status descriptor is */ |
| /* written, the interrupt line is de-asserted */ |
| /* by the Cn847x. In the case of MIPS */ |
| /* microprocessors, this must occur at the */ |
| /* beginning of the interrupt handler so that */ |
| /* the interrupt handle is not re-entered due */ |
| /* to interrupt dis-assertion latency. */ |
| /* In the case of all other processors, this */ |
| /* action should occur at the end of the */ |
| /* interrupt handler to avoid overwriting the */ |
| /* interrupt queue. */ |
| /************************************************/ |
| |
| if (intCnt) |
| { |
| currInt = (intCnt + nextInt) & (INT_QUEUE_SIZE - 1); |
| } else |
| { |
| /* |
| * NOTE: Servicing an interrupt whose ISD contains a count of ZERO |
| * can be indicative of a Shared Interrupt chain. Our driver can be |
| * called from the system's interrupt handler as a matter of the OS |
| * walking the chain. As the chain is walked, the interrupt will |
| * eventually be serviced by the correct driver/handler. |
| */ |
| #if 0 |
| /* chained interrupt = not ours */ |
| pr_info(">> %s: intCnt NULL, sts %x, possibly a chained interrupt!\n", |
| ci->devname, status); |
| #endif |
| return IRQ_NONE; |
| } |
| |
| ci->iqp_tailx = currInt; |
| |
| currInt <<= INTRPTS_NEXTINT_S; |
| ci->intlog.last_status_new = ci->intlog.this_status_new; |
| ci->intlog.this_status_new = currInt; |
| |
| if ((log_level >= LOG_WARN) && (status & INTRPTS_INTFULL_M)) |
| { |
| pr_info("%s: Interrupt queue full condition occurred\n", ci->devname); |
| } |
| if (log_level >= LOG_DEBUG) |
| pr_info("%s: interrupts pending, isd @ 0x%p: %x curr %d cnt %d NEXT %d\n", |
| ci->devname, &ci->reg->isd, |
| status, nextInt, intCnt, (intCnt + nextInt) & (INT_QUEUE_SIZE - 1)); |
| |
| FLUSH_MEM_WRITE (); |
| #if defined(SBE_ISR_TASKLET) |
| pci_write_32 ((u_int32_t *) &ci->reg->isd, currInt); |
| atomic_inc (&ci->bh_pending); |
| tasklet_schedule (&ci->ci_musycc_isr_tasklet); |
| #elif defined(SBE_ISR_IMMEDIATE) |
| pci_write_32 ((u_int32_t *) &ci->reg->isd, currInt); |
| atomic_inc (&ci->bh_pending); |
| queue_task (&ci->ci_musycc_isr_tq, &tq_immediate); |
| mark_bh (IMMEDIATE_BH); |
| #elif defined(SBE_ISR_INLINE) |
| (void) musycc_intr_bh_tasklet (ci); |
| pci_write_32 ((u_int32_t *) &ci->reg->isd, currInt); |
| #endif |
| return IRQ_HANDLED; |
| } |
| |
| |
| #if defined(SBE_ISR_IMMEDIATE) |
| unsigned long |
| #else |
| void |
| #endif |
| musycc_intr_bh_tasklet (ci_t * ci) |
| { |
| mpi_t *pi; |
| mch_t *ch; |
| unsigned int intCnt; |
| volatile u_int32_t currInt = 0; |
| volatile unsigned int headx, tailx; |
| int readCount, loopCount; |
| int group, gchan, event, err, tx; |
| u_int32_t badInt = INT_EMPTY_ENTRY; |
| u_int32_t badInt2 = INT_EMPTY_ENTRY2; |
| |
| /* |
| * Hardware not available, potential interrupt hang. But since interrupt |
| * might be shared, just return. |
| */ |
| if ((drvr_state != SBE_DRVR_AVAILABLE) || (ci->state == C_INIT)) |
| { |
| #if defined(SBE_ISR_IMMEDIATE) |
| return 0L; |
| #else |
| return; |
| #endif |
| } |
| #if defined(SBE_ISR_TASKLET) || defined(SBE_ISR_IMMEDIATE) |
| if (drvr_state != SBE_DRVR_AVAILABLE) |
| { |
| #if defined(SBE_ISR_TASKLET) |
| return; |
| #elif defined(SBE_ISR_IMMEDIATE) |
| return 0L; |
| #endif |
| } |
| #elif defined(SBE_ISR_INLINE) |
| /* no semaphore taken, no double checks */ |
| #endif |
| |
| ci->intlog.drvr_intr_bhcount++; |
| FLUSH_MEM_READ (); |
| { |
| unsigned int bh = atomic_read (&ci->bh_pending); |
| |
| max_bh = max (bh, max_bh); |
| } |
| atomic_set (&ci->bh_pending, 0);/* if here, no longer pending */ |
| while ((headx = ci->iqp_headx) != (tailx = ci->iqp_tailx)) |
| { |
| intCnt = (tailx >= headx) ? (tailx - headx) : (tailx - headx + INT_QUEUE_SIZE); |
| currInt = le32_to_cpu (ci->iqd_p[headx]); |
| |
| max_intcnt = max (intCnt, max_intcnt); /* RLD DEBUG */ |
| |
| /**************************************************/ |
| /* HW Bug Fix */ |
| /* ---------- */ |
| /* The following code checks for the condition */ |
| /* of interrupt assertion before interrupt */ |
| /* queue update. This is a problem on several */ |
| /* PCI-Local bridge chips found on some products. */ |
| /**************************************************/ |
| |
| readCount = 0; |
| if ((currInt == badInt) || (currInt == badInt2)) |
| ci->intlog.drvr_int_failure++; |
| |
| while ((currInt == badInt) || (currInt == badInt2)) |
| { |
| for (loopCount = 0; loopCount < 0x30; loopCount++) |
| OS_uwait_dummy (); /* use call to avoid optimization removal |
| * of dummy delay */ |
| FLUSH_MEM_READ (); |
| currInt = le32_to_cpu (ci->iqd_p[headx]); |
| if (readCount++ > 20) |
| break; |
| } |
| |
| if ((currInt == badInt) || (currInt == badInt2)) /* catch failure of Bug |
| * Fix checking */ |
| { |
| if (log_level >= LOG_WARN) |
| pr_info("%s: Illegal Interrupt Detected @ 0x%p, mod %d.)\n", |
| ci->devname, &ci->iqd_p[headx], headx); |
| |
| /* |
| * If the descriptor has not recovered, then leaving the EMPTY |
| * entry set will not signal to the MUSYCC that this descriptor |
| * has been serviced. The Interrupt Queue can then start loosing |
| * available descriptors and MUSYCC eventually encounters and |
| * reports the INTFULL condition. Per manual, changing any bit |
| * marks descriptor as available, thus the use of different |
| * EMPTY_ENTRY values. |
| */ |
| |
| if (currInt == badInt) |
| { |
| ci->iqd_p[headx] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY2); |
| } else |
| { |
| ci->iqd_p[headx] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY); |
| } |
| ci->iqp_headx = (headx + 1) & (INT_QUEUE_SIZE - 1); /* insure wrapness */ |
| FLUSH_MEM_WRITE (); |
| FLUSH_MEM_READ (); |
| continue; |
| } |
| group = INTRPT_GRP (currInt); |
| gchan = INTRPT_CH (currInt); |
| event = INTRPT_EVENT (currInt); |
| err = INTRPT_ERROR (currInt); |
| tx = currInt & INTRPT_DIR_M; |
| |
| ci->iqd_p[headx] = __constant_cpu_to_le32 (INT_EMPTY_ENTRY); |
| FLUSH_MEM_WRITE (); |
| |
| if (log_level >= LOG_DEBUG) |
| { |
| if (err != 0) |
| pr_info(" %08x -> err: %2d,", currInt, err); |
| |
| pr_info("+ interrupt event: %d, grp: %d, chan: %2d, side: %cX\n", |
| event, group, gchan, tx ? 'T' : 'R'); |
| } |
| pi = &ci->port[group]; /* notice that here we assume 1-1 group - |
| * port mapping */ |
| ch = pi->chan[gchan]; |
| switch (event) |
| { |
| case EVE_SACK: /* Service Request Acknowledge */ |
| if (log_level >= LOG_DEBUG) |
| { |
| volatile u_int32_t r; |
| |
| r = pci_read_32 ((u_int32_t *) &pi->reg->srd); |
| pr_info("- SACK cmd: %08x (hdw= %08x)\n", pi->sr_last, r); |
| } |
| SD_SEM_GIVE (&pi->sr_sem_wait); /* wake up waiting process */ |
| break; |
| case EVE_CHABT: /* Change To Abort Code (0x7e -> 0xff) */ |
| case EVE_CHIC: /* Change To Idle Code (0xff -> 0x7e) */ |
| break; |
| case EVE_EOM: /* End Of Message */ |
| case EVE_EOB: /* End Of Buffer (Transparent mode) */ |
| if (tx) |
| { |
| musycc_bh_tx_eom (pi, gchan); |
| } else |
| { |
| musycc_bh_rx_eom (pi, gchan); |
| } |
| #if 0 |
| break; |
| #else |
| /* |
| * MUSYCC Interrupt Descriptor section states that EOB and EOM |
| * can be combined with the NONE error (as well as others). So |
| * drop thru to catch this... |
| */ |
| #endif |
| case EVE_NONE: |
| if (err == ERR_SHT) |
| { |
| ch->s.rx_length_errors++; |
| } |
| break; |
| default: |
| if (log_level >= LOG_WARN) |
| pr_info("%s: unexpected interrupt event: %d, iqd[%d]: %08x, port: %d\n", ci->devname, |
| event, headx, currInt, group); |
| break; |
| } /* switch on event */ |
| |
| |
| /* |
| * Per MUSYCC Manual, Section 6.4.8.3 [Transmit Errors], TX errors |
| * are service-affecting and require action to resume normal |
| * bit-level processing. |
| */ |
| |
| switch (err) |
| { |
| case ERR_ONR: |
| /* |
| * Per MUSYCC manual, Section 6.4.8.3 [Transmit Errors], this |
| * error requires Transmit channel reactivation. |
| * |
| * Per MUSYCC manual, Section 6.4.8.4 [Receive Errors], this error |
| * requires Receive channel reactivation. |
| */ |
| if (tx) |
| { |
| |
| /* |
| * TX ONR Error only occurs when channel is configured for |
| * Transparent Mode. However, this code will catch and |
| * re-activate on ANY TX ONR error. |
| */ |
| |
| /* |
| * Set flag to re-enable on any next transmit attempt. |
| */ |
| ch->ch_start_tx = CH_START_TX_ONR; |
| |
| { |
| #ifdef RLD_TRANS_DEBUG |
| if (1 || log_level >= LOG_MONITOR) |
| #else |
| if (log_level >= LOG_MONITOR) |
| #endif |
| { |
| pr_info("%s: TX buffer underflow [ONR] on channel %d, mode %x QStopped %x free %d\n", |
| ci->devname, ch->channum, ch->p.chan_mode, sd_queue_stopped (ch->user), ch->txd_free); |
| #ifdef RLD_DEBUG |
| if (ch->p.chan_mode == 2) /* problem = ONR on HDLC |
| * mode */ |
| { |
| pr_info("++ Failed Last %x Next %x QStopped %x, start_tx %x tx_full %d txd_free %d mode %x\n", |
| (u_int32_t) ch->txd_irq_srv, (u_int32_t) ch->txd_usr_add, |
| sd_queue_stopped (ch->user), |
| ch->ch_start_tx, ch->tx_full, ch->txd_free, ch->p.chan_mode); |
| musycc_dump_txbuffer_ring (ch, 0); |
| } |
| #endif |
| } |
| } |
| } else /* RX buffer overrun */ |
| { |
| /* |
| * Per MUSYCC manual, Section 6.4.8.4 [Receive Errors], |
| * channel recovery for this RX ONR error IS required. It is |
| * also suggested to increase the number of receive buffers |
| * for this channel. Receive channel reactivation IS |
| * required, and data has been lost. |
| */ |
| ch->s.rx_over_errors++; |
| ch->ch_start_rx = CH_START_RX_ONR; |
| |
| if (log_level >= LOG_WARN) |
| { |
| pr_info("%s: RX buffer overflow [ONR] on channel %d, mode %x\n", |
| ci->devname, ch->channum, ch->p.chan_mode); |
| //musycc_dump_rxbuffer_ring (ch, 0); /* RLD DEBUG */ |
| } |
| } |
| musycc_chan_restart (ch); |
| break; |
| case ERR_BUF: |
| if (tx) |
| { |
| ch->s.tx_fifo_errors++; |
| ch->ch_start_tx = CH_START_TX_BUF; |
| /* |
| * Per MUSYCC manual, Section 6.4.8.3 [Transmit Errors], |
| * this BUFF error requires Transmit channel reactivation. |
| */ |
| if (log_level >= LOG_MONITOR) |
| pr_info("%s: TX buffer underrun [BUFF] on channel %d, mode %x\n", |
| ci->devname, ch->channum, ch->p.chan_mode); |
| } else /* RX buffer overrun */ |
| { |
| ch->s.rx_over_errors++; |
| /* |
| * Per MUSYCC manual, Section 6.4.8.4 [Receive Errors], HDLC |
| * mode requires NO recovery for this RX BUFF error is |
| * required. It is suggested to increase the FIFO buffer |
| * space for this channel. Receive channel reactivation is |
| * not required, but data has been lost. |
| */ |
| if (log_level >= LOG_WARN) |
| pr_info("%s: RX buffer overrun [BUFF] on channel %d, mode %x\n", |
| ci->devname, ch->channum, ch->p.chan_mode); |
| /* |
| * Per MUSYCC manual, Section 6.4.9.4 [Receive Errors], |
| * Transparent mode DOES require recovery for the RX BUFF |
| * error. It is suggested to increase the FIFO buffer space |
| * for this channel. Receive channel reactivation IS |
| * required and data has been lost. |
| */ |
| if (ch->p.chan_mode == CFG_CH_PROTO_TRANS) |
| ch->ch_start_rx = CH_START_RX_BUF; |
| } |
| |
| if (tx || (ch->p.chan_mode == CFG_CH_PROTO_TRANS)) |
| musycc_chan_restart (ch); |
| break; |
| default: |
| break; |
| } /* switch on err */ |
| |
| /* Check for interrupt lost condition */ |
| if ((currInt & INTRPT_ILOST_M) && (log_level >= LOG_ERROR)) |
| { |
| pr_info("%s: Interrupt queue overflow - ILOST asserted\n", |
| ci->devname); |
| } |
| ci->iqp_headx = (headx + 1) & (INT_QUEUE_SIZE - 1); /* insure wrapness */ |
| FLUSH_MEM_WRITE (); |
| FLUSH_MEM_READ (); |
| } /* while */ |
| if ((log_level >= LOG_MONITOR2) && (ci->iqp_headx != ci->iqp_tailx)) |
| { |
| int bh; |
| |
| bh = atomic_read (&CI->bh_pending); |
| pr_info("_bh_: late arrivals, head %d != tail %d, pending %d\n", |
| ci->iqp_headx, ci->iqp_tailx, bh); |
| } |
| #if defined(SBE_ISR_IMMEDIATE) |
| return 0L; |
| #endif |
| /* else, nothing returned */ |
| } |
| |
| #if 0 |
| int __init |
| musycc_new_chan (ci_t * ci, int channum, void *user) |
| { |
| mch_t *ch; |
| |
| ch = ci->port[channum / MUSYCC_NCHANS].chan[channum % MUSYCC_NCHANS]; |
| |
| if (ch->state != UNASSIGNED) |
| return EEXIST; |
| /* NOTE: mch_t already cleared during OS_kmalloc() */ |
| ch->state = DOWN; |
| ch->user = user; |
| #if 0 |
| ch->status = 0; |
| ch->p.status = 0; |
| ch->p.intr_mask = 0; |
| #endif |
| ch->p.chan_mode = CFG_CH_PROTO_HDLC_FCS16; |
| ch->p.idlecode = CFG_CH_FLAG_7E; |
| ch->p.pad_fill_count = 2; |
| spin_lock_init (&ch->ch_rxlock); |
| spin_lock_init (&ch->ch_txlock); |
| |
| return 0; |
| } |
| #endif |
| |
| |
| #ifdef SBE_PMCC4_ENABLE |
| status_t |
| musycc_chan_down (ci_t * dummy, int channum) |
| { |
| mpi_t *pi; |
| mch_t *ch; |
| int i, gchan; |
| |
| if (!(ch = sd_find_chan (dummy, channum))) |
| return EINVAL; |
| pi = ch->up; |
| gchan = ch->gchan; |
| |
| /* Deactivate the channel */ |
| musycc_serv_req (pi, SR_CHANNEL_DEACTIVATE | SR_RX_DIRECTION | gchan); |
| ch->ch_start_rx = 0; |
| musycc_serv_req (pi, SR_CHANNEL_DEACTIVATE | SR_TX_DIRECTION | gchan); |
| ch->ch_start_tx = 0; |
| |
| if (ch->state == DOWN) |
| return 0; |
| ch->state = DOWN; |
| |
| pi->regram->thp[gchan] = 0; |
| pi->regram->tmp[gchan] = 0; |
| pi->regram->rhp[gchan] = 0; |
| pi->regram->rmp[gchan] = 0; |
| FLUSH_MEM_WRITE (); |
| for (i = 0; i < ch->txd_num; i++) |
| { |
| if (ch->mdt[i].mem_token != 0) |
| OS_mem_token_free (ch->mdt[i].mem_token); |
| } |
| |
| for (i = 0; i < ch->rxd_num; i++) |
| { |
| if (ch->mdr[i].mem_token != 0) |
| OS_mem_token_free (ch->mdr[i].mem_token); |
| } |
| |
| OS_kfree (ch->mdr); |
| ch->mdr = 0; |
| ch->rxd_num = 0; |
| OS_kfree (ch->mdt); |
| ch->mdt = 0; |
| ch->txd_num = 0; |
| |
| musycc_update_timeslots (pi); |
| c4_fifo_free (pi, ch->gchan); |
| |
| pi->openchans--; |
| return 0; |
| } |
| #endif |
| |
| |
| int |
| musycc_del_chan (ci_t * ci, int channum) |
| { |
| mch_t *ch; |
| |
| if ((channum < 0) || (channum >= (MUSYCC_NPORTS * MUSYCC_NCHANS))) /* sanity chk param */ |
| return ECHRNG; |
| if (!(ch = sd_find_chan (ci, channum))) |
| return ENOENT; |
| if (ch->state == UP) |
| musycc_chan_down (ci, channum); |
| ch->state = UNASSIGNED; |
| return 0; |
| } |
| |
| |
| int |
| musycc_del_chan_stats (ci_t * ci, int channum) |
| { |
| mch_t *ch; |
| |
| if (channum < 0 || channum >= (MUSYCC_NPORTS * MUSYCC_NCHANS)) /* sanity chk param */ |
| return ECHRNG; |
| if (!(ch = sd_find_chan (ci, channum))) |
| return ENOENT; |
| |
| memset (&ch->s, 0, sizeof (struct sbecom_chan_stats)); |
| return 0; |
| } |
| |
| |
| int |
| musycc_start_xmit (ci_t * ci, int channum, void *mem_token) |
| { |
| mch_t *ch; |
| struct mdesc *md; |
| void *m2; |
| #if 0 |
| unsigned long flags; |
| #endif |
| int txd_need_cnt; |
| u_int32_t len; |
| |
| if (!(ch = sd_find_chan (ci, channum))) |
| return ENOENT; |
| |
| if (ci->state != C_RUNNING) /* full interrupt processing available */ |
| return EINVAL; |
| if (ch->state != UP) |
| return EINVAL; |
| |
| if (!(ch->status & TX_ENABLED)) |
| return EROFS; /* how else to flag unwritable state ? */ |
| |
| #ifdef RLD_TRANS_DEBUGx |
| if (1 || log_level >= LOG_MONITOR2) |
| #else |
| if (log_level >= LOG_MONITOR2) |
| #endif |
| { |
| pr_info("++ start_xmt[%d]: state %x start %x full %d free %d required %d stopped %x\n", |
| channum, ch->state, ch->ch_start_tx, ch->tx_full, |
| ch->txd_free, ch->txd_required, sd_queue_stopped (ch->user)); |
| } |
| /***********************************************/ |
| /** Determine total amount of data to be sent **/ |
| /***********************************************/ |
| m2 = mem_token; |
| txd_need_cnt = 0; |
| for (len = OS_mem_token_tlen (m2); len > 0; |
| m2 = (void *) OS_mem_token_next (m2)) |
| { |
| if (!OS_mem_token_len (m2)) |
| continue; |
| txd_need_cnt++; |
| len -= OS_mem_token_len (m2); |
| } |
| |
| if (txd_need_cnt == 0) |
| { |
| if (log_level >= LOG_MONITOR2) |
| pr_info("%s channel %d: no TX data in User buffer\n", ci->devname, channum); |
| OS_mem_token_free (mem_token); |
| return 0; /* no data to send */ |
| } |
| /*************************************************/ |
| /** Are there sufficient descriptors available? **/ |
| /*************************************************/ |
| if (txd_need_cnt > ch->txd_num) /* never enough descriptors for this |
| * large a buffer */ |
| { |
| if (log_level >= LOG_DEBUG) |
| { |
| pr_info("start_xmit: discarding buffer, insufficient descriptor cnt %d, need %d.\n", |
| ch->txd_num, txd_need_cnt + 1); |
| } |
| ch->s.tx_dropped++; |
| OS_mem_token_free (mem_token); |
| return 0; |
| } |
| #if 0 |
| spin_lock_irqsave (&ch->ch_txlock, flags); |
| #endif |
| /************************************************************/ |
| /** flow control the line if not enough descriptors remain **/ |
| /************************************************************/ |
| if (txd_need_cnt > ch->txd_free) |
| { |
| if (log_level >= LOG_MONITOR2) |
| { |
| pr_info("start_xmit[%d]: EBUSY - need more descriptors, have %d of %d need %d\n", |
| channum, ch->txd_free, ch->txd_num, txd_need_cnt); |
| } |
| ch->tx_full = 1; |
| ch->txd_required = txd_need_cnt; |
| sd_disable_xmit (ch->user); |
| #if 0 |
| spin_unlock_irqrestore (&ch->ch_txlock, flags); |
| #endif |
| return EBUSY; /* tell user to try again later */ |
| } |
| /**************************************************/ |
| /** Put the user data into MUSYCC data buffer(s) **/ |
| /**************************************************/ |
| m2 = mem_token; |
| md = ch->txd_usr_add; /* get current available descriptor */ |
| |
| for (len = OS_mem_token_tlen (m2); len > 0; m2 = OS_mem_token_next (m2)) |
| { |
| int u = OS_mem_token_len (m2); |
| |
| if (!u) |
| continue; |
| len -= u; |
| |
| /* |
| * Enable following chunks, yet wait to enable the FIRST chunk until |
| * after ALL subsequent chunks are setup. |
| */ |
| if (md != ch->txd_usr_add) /* not first chunk */ |
| u |= MUSYCC_TX_OWNED; /* transfer ownership from HOST to MUSYCC */ |
| |
| if (len) /* not last chunk */ |
| u |= EOBIRQ_ENABLE; |
| else if (ch->p.chan_mode == CFG_CH_PROTO_TRANS) |
| { |
| /* |
| * Per MUSYCC Ref 6.4.9 for Transparent Mode, the host must |
| * always clear EOMIRQ_ENABLE in every Transmit Buffer Descriptor |
| * (IE. don't set herein). |
| */ |
| u |= EOBIRQ_ENABLE; |
| } else |
| u |= EOMIRQ_ENABLE; /* EOM, last HDLC chunk */ |
| |
| |
| /* last chunk in hdlc mode */ |
| u |= (ch->p.idlecode << IDLE_CODE); |
| if (ch->p.pad_fill_count) |
| { |
| #if 0 |
| /* NOOP NOTE: u_int8_t cannot be > 0xFF */ |
| /* sanitize pad_fill_count for maximums allowed by hardware */ |
| if (ch->p.pad_fill_count > EXTRA_FLAGS_MASK) |
| ch->p.pad_fill_count = EXTRA_FLAGS_MASK; |
| #endif |
| u |= (PADFILL_ENABLE | (ch->p.pad_fill_count << EXTRA_FLAGS)); |
| } |
| md->mem_token = len ? 0 : mem_token; /* Fill in mds on last |
| * segment, others set ZERO |
| * so that entire token is |
| * removed ONLY when ALL |
| * segments have been |
| * transmitted. */ |
| |
| md->data = cpu_to_le32 (OS_vtophys (OS_mem_token_data (m2))); |
| FLUSH_MEM_WRITE (); |
| md->status = cpu_to_le32 (u); |
| --ch->txd_free; |
| md = md->snext; |
| } |
| FLUSH_MEM_WRITE (); |
| |
| |
| /* |
| * Now transfer ownership of first chunk from HOST to MUSYCC in order to |
| * fire-off this XMIT. |
| */ |
| ch->txd_usr_add->status |= __constant_cpu_to_le32 (MUSYCC_TX_OWNED); |
| FLUSH_MEM_WRITE (); |
| ch->txd_usr_add = md; |
| |
| len = OS_mem_token_tlen (mem_token); |
| atomic_add (len, &ch->tx_pending); |
| atomic_add (len, &ci->tx_pending); |
| ch->s.tx_packets++; |
| ch->s.tx_bytes += len; |
| /* |
| * If an ONR was seen, then channel requires poking to restart |
| * transmission. |
| */ |
| if (ch->ch_start_tx) |
| { |
| musycc_chan_restart (ch); |
| } |
| #ifdef SBE_WAN256T3_ENABLE |
| wan256t3_led (ci, LED_TX, LEDV_G); |
| #endif |
| return 0; |
| } |
| |
| |
| /*** End-of-File ***/ |
