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165 lines
3.9 KiB
C
165 lines
3.9 KiB
C
/*
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*
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* ===================================
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* HARP | Host ATM Research Platform
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* ===================================
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*
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*
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* This Host ATM Research Platform ("HARP") file (the "Software") is
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* made available by Network Computing Services, Inc. ("NetworkCS")
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* "AS IS". NetworkCS does not provide maintenance, improvements or
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* support of any kind.
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*
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* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
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* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
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* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
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* In no event shall NetworkCS be responsible for any damages, including
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* but not limited to consequential damages, arising from or relating to
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* any use of the Software or related support.
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*
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* Copyright 1994-1998 Network Computing Services, Inc.
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*
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* Copies of this Software may be made, however, the above copyright
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* notice must be reproduced on all copies.
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*
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* @(#) $Id: fore_stats.c,v 1.2 1998/09/17 09:34:59 phk Exp $
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*
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*/
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/*
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* FORE Systems 200-Series Adapter Support
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* ---------------------------------------
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*
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* Device statistics routines
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*
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*/
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#include <dev/hfa/fore_include.h>
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#ifndef lint
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__RCSID("@(#) $Id: fore_stats.c,v 1.2 1998/09/17 09:34:59 phk Exp $");
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#endif
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/*
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* Get device statistics from CP
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*
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* This function will issue a GET_STATS command to the CP in order to
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* initiate the DMA transfer of the CP's statistics structure to the host.
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* We will then sleep pending command completion. This must only be called
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* from the ioctl system call handler.
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*
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* Called at splnet.
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*
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* Arguments:
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* fup pointer to device unit structure
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*
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* Returns:
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* 0 stats retrieval successful
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* errno stats retrieval failed - reason indicated
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*
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*/
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int
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fore_get_stats(fup)
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Fore_unit *fup;
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{
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H_cmd_queue *hcp;
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Cmd_queue *cqp;
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int s, sst;
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ATM_DEBUG1("fore_get_stats: fup=%p\n", fup);
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/*
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* Make sure device has been initialized
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*/
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if ((fup->fu_flags & CUF_INITED) == 0) {
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return (EIO);
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}
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/*
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* If someone has already initiated a stats request, we'll
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* just wait for that one to complete
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*/
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s = splimp();
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if (fup->fu_flags & FUF_STATCMD) {
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#if (defined(BSD) && (BSD >= 199103))
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sst = tsleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH, "fore", 0);
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#else
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sst = sleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH);
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if (sst != 0)
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sst = EINTR;
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#endif
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(void) splx(s);
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return (sst ? sst : fup->fu_stats_ret);
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}
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/*
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* Limit stats gathering to once a second or so
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*/
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if (time_second == fup->fu_stats_time) {
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(void) splx(s);
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return (0);
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} else
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fup->fu_stats_time = time_second;
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/*
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* Queue command at end of command queue
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*/
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hcp = fup->fu_cmd_tail;
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if ((*hcp->hcq_status) & QSTAT_FREE) {
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void *dma;
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/*
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* Queue entry available, so set our view of things up
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*/
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hcp->hcq_code = CMD_GET_STATS;
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hcp->hcq_arg = NULL;
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fup->fu_cmd_tail = hcp->hcq_next;
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/*
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* Now set the CP-resident queue entry - the CP will grab
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* the command when the op-code is set.
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*/
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cqp = hcp->hcq_cpelem;
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(*hcp->hcq_status) = QSTAT_PENDING;
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dma = DMA_GET_ADDR(fup->fu_stats, sizeof(Fore_cp_stats),
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FORE_STATS_ALIGN, 0);
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if (dma == NULL) {
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fup->fu_stats->st_drv.drv_cm_nodma++;
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(void) splx(s);
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return (EIO);
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}
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fup->fu_statsd = dma;
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cqp->cmdq_stats.stats_buffer = (CP_dma) CP_WRITE(dma);
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fup->fu_flags |= FUF_STATCMD;
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cqp->cmdq_stats.stats_cmd =
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CP_WRITE(CMD_GET_STATS | CMD_INTR_REQ);
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/*
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* Now wait for command to finish
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*/
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#if (defined(BSD) && (BSD >= 199103))
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sst = tsleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH, "fore", 0);
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#else
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sst = sleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH);
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if (sst != 0)
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sst = EINTR;
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#endif
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(void) splx(s);
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return (sst ? sst : fup->fu_stats_ret);
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} else {
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/*
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* Command queue full
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*/
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fup->fu_stats->st_drv.drv_cm_full++;
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(void) splx(s);
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return (EIO);
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}
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}
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