diff options
Diffstat (limited to 'sys/dev/hfa/fore_stats.c')
| -rw-r--r-- | sys/dev/hfa/fore_stats.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/sys/dev/hfa/fore_stats.c b/sys/dev/hfa/fore_stats.c new file mode 100644 index 0000000..a8271a2 --- /dev/null +++ b/sys/dev/hfa/fore_stats.c @@ -0,0 +1,164 @@ +/* + * + * =================================== + * HARP | Host ATM Research Platform + * =================================== + * + * + * This Host ATM Research Platform ("HARP") file (the "Software") is + * made available by Network Computing Services, Inc. ("NetworkCS") + * "AS IS". NetworkCS does not provide maintenance, improvements or + * support of any kind. + * + * NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED, + * INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY + * AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE + * SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE. + * In no event shall NetworkCS be responsible for any damages, including + * but not limited to consequential damages, arising from or relating to + * any use of the Software or related support. + * + * Copyright 1994-1998 Network Computing Services, Inc. + * + * Copies of this Software may be made, however, the above copyright + * notice must be reproduced on all copies. + * + * @(#) $Id: fore_stats.c,v 1.5 1997/08/22 18:41:21 mks Exp $ + * + */ + +/* + * FORE Systems 200-Series Adapter Support + * --------------------------------------- + * + * Device statistics routines + * + */ + +#ifndef lint +static char *RCSid = "@(#) $Id: fore_stats.c,v 1.5 1997/08/22 18:41:21 mks Exp $"; +#endif + +#include <dev/hfa/fore_include.h> + + +/* + * Get device statistics from CP + * + * This function will issue a GET_STATS command to the CP in order to + * initiate the DMA transfer of the CP's statistics structure to the host. + * We will then sleep pending command completion. This must only be called + * from the ioctl system call handler. + * + * Called at splnet. + * + * Arguments: + * fup pointer to device unit structure + * + * Returns: + * 0 stats retrieval successful + * errno stats retrieval failed - reason indicated + * + */ +int +fore_get_stats(fup) + Fore_unit *fup; +{ + H_cmd_queue *hcp; + Cmd_queue *cqp; + int s, sst; + + ATM_DEBUG1("fore_get_stats: fup=0x%x\n", (int)fup); + + /* + * Make sure device has been initialized + */ + if ((fup->fu_flags & CUF_INITED) == 0) { + return (EIO); + } + + /* + * If someone has already initiated a stats request, we'll + * just wait for that one to complete + */ + s = splimp(); + if (fup->fu_flags & FUF_STATCMD) { + +#if (defined(BSD) && (BSD >= 199103)) + sst = tsleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH, "fore", 0); +#else + sst = sleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH); + if (sst != 0) + sst = EINTR; +#endif + (void) splx(s); + return (sst ? sst : fup->fu_stats_ret); + } + + /* + * Limit stats gathering to once a second or so + */ + if (time_second == fup->fu_stats_time) { + (void) splx(s); + return (0); + } else + fup->fu_stats_time = time_second; + + /* + * Queue command at end of command queue + */ + hcp = fup->fu_cmd_tail; + if ((*hcp->hcq_status) & QSTAT_FREE) { + void *dma; + + /* + * Queue entry available, so set our view of things up + */ + hcp->hcq_code = CMD_GET_STATS; + hcp->hcq_arg = NULL; + fup->fu_cmd_tail = hcp->hcq_next; + + /* + * Now set the CP-resident queue entry - the CP will grab + * the command when the op-code is set. + */ + cqp = hcp->hcq_cpelem; + (*hcp->hcq_status) = QSTAT_PENDING; + + dma = DMA_GET_ADDR(fup->fu_stats, sizeof(Fore_cp_stats), + FORE_STATS_ALIGN, 0); + if (dma == NULL) { + fup->fu_stats->st_drv.drv_cm_nodma++; + (void) splx(s); + return (EIO); + } + fup->fu_statsd = dma; + cqp->cmdq_stats.stats_buffer = (CP_dma) CP_WRITE(dma); + + fup->fu_flags |= FUF_STATCMD; + cqp->cmdq_stats.stats_cmd = + CP_WRITE(CMD_GET_STATS | CMD_INTR_REQ); + + /* + * Now wait for command to finish + */ +#if (defined(BSD) && (BSD >= 199103)) + sst = tsleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH, "fore", 0); +#else + sst = sleep((caddr_t)&fup->fu_stats, PWAIT|PCATCH); + if (sst != 0) + sst = EINTR; +#endif + (void) splx(s); + return (sst ? sst : fup->fu_stats_ret); + + } else { + /* + * Command queue full + */ + fup->fu_stats->st_drv.drv_cm_full++; + (void) splx(s); + return (EIO); + } +} + |
