From 7a195f464e0692607aca8150c8489a838fab684b Mon Sep 17 00:00:00 2001 From: "Prakash, Sathya" Date: Tue, 14 Aug 2007 16:08:40 +0530 Subject: [SCSI] mpt fusion: Usage of high priority request FIFO to send task management commands Added support for sending the task management requests through High priority request FIFO instead of Doorbell writes when firmware support High priority FIFO. signed-off-by: Sathya Prakash Acked-by: Eric Moore Signed-off-by: James Bottomley --- drivers/message/fusion/mptbase.c | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) (limited to 'drivers/message/fusion/mptbase.c') diff --git a/drivers/message/fusion/mptbase.c b/drivers/message/fusion/mptbase.c index 828f0ca7c1b..7ef86cb3aa5 100644 --- a/drivers/message/fusion/mptbase.c +++ b/drivers/message/fusion/mptbase.c @@ -842,6 +842,38 @@ mpt_put_msg_frame(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf) CHIPREG_WRITE32(&ioc->chip->RequestFifo, mf_dma_addr); } +/** + * mpt_put_msg_frame_hi_pri - Send a protocol specific MPT request frame + * to a IOC using hi priority request queue. + * @handle: Handle of registered MPT protocol driver + * @ioc: Pointer to MPT adapter structure + * @mf: Pointer to MPT request frame + * + * This routine posts a MPT request frame to the request post FIFO of a + * specific MPT adapter. + **/ +void +mpt_put_msg_frame_hi_pri(int handle, MPT_ADAPTER *ioc, MPT_FRAME_HDR *mf) +{ + u32 mf_dma_addr; + int req_offset; + u16 req_idx; /* Request index */ + + /* ensure values are reset properly! */ + mf->u.frame.hwhdr.msgctxu.fld.cb_idx = handle; + req_offset = (u8 *)mf - (u8 *)ioc->req_frames; + req_idx = req_offset / ioc->req_sz; + mf->u.frame.hwhdr.msgctxu.fld.req_idx = cpu_to_le16(req_idx); + mf->u.frame.hwhdr.msgctxu.fld.rsvd = 0; + + DBG_DUMP_PUT_MSG_FRAME(ioc, (u32 *)mf); + + mf_dma_addr = (ioc->req_frames_low_dma + req_offset); + dsgprintk(ioc, printk(MYIOC_s_DEBUG_FMT "mf_dma_addr=%x req_idx=%d\n", + ioc->name, mf_dma_addr, req_idx)); + CHIPREG_WRITE32(&ioc->chip->RequestHiPriFifo, mf_dma_addr); +} + /*=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=*/ /** * mpt_free_msg_frame - Place MPT request frame back on FreeQ. @@ -7315,6 +7347,7 @@ EXPORT_SYMBOL(mpt_device_driver_register); EXPORT_SYMBOL(mpt_device_driver_deregister); EXPORT_SYMBOL(mpt_get_msg_frame); EXPORT_SYMBOL(mpt_put_msg_frame); +EXPORT_SYMBOL(mpt_put_msg_frame_hi_pri); EXPORT_SYMBOL(mpt_free_msg_frame); EXPORT_SYMBOL(mpt_add_sge); EXPORT_SYMBOL(mpt_send_handshake_request); -- cgit v1.2.3-70-g09d2