Date: Sun, 27 Mar 2011 22:32:14 +0000 (UTC) From: Pyun YongHyeon <yongari@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/dev/dc if_dc.c if_dcreg.h Message-ID: <201103272232.p2RMWW3j004751@repoman.freebsd.org>
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yongari 2011-03-27 22:32:14 UTC FreeBSD src repository Modified files: (Branch: RELENG_7) sys/dev/dc if_dc.c if_dcreg.h Log: SVN rev 220069 on 2011-03-27 22:32:14Z by yongari MFC r218789,218820,218826-218828: r218789: Remove use case of DC_TX_ONE. It was used to limit queue just 1 TX frame in DM910x controllers. In r67595(more than 10 years ago) it was replaced to use "Store and Forward" mode and made controller generate TX completion interrupt for every frame. r218820: For controllers that have TX interrupt moderation capability, request TX completion interrupt for every 8-th frames. Previously dc(4) requested TX completion interrupt if number of queued TX descriptors is greater than 64. This caused a lot of TX completion interrupt under high TX load once driver queued more than 64 TX descriptors. It's quite normal to see more than 64 queued TX descriptors under high TX load. This change reduces the number of TX completion interrupts to be less than 17k under high TX load. Because this change does not generate TX completion interrupt for each frame, add reclaiming transmitted buffers in dc_tick not to generate false watchdog timeouts. While I'm here add check for queued descriptors in dc_txeof() since there is no more work to do when there is no pending descriptors. r218826: Make sure to clear status word of TX descriptor in dc_list_tx_init(). Do not update if_opackets if the transmission had failed. r218827: There is no need to execute filter configuration when driver is not running. Remove wrong driver state change in dc_setfilt_xircom(). While I'm here nuke unnecessary assignments. r218828: Fix a long standing bug where driver handed over RX descriptor ownership to controller before completion of access to the descriptor. Driver is faking up status word so it should not give ownership to controller until it completes RX processing. Revision Changes Path 1.192.2.11 +22 -16 src/sys/dev/dc/if_dc.c 1.54.2.7 +1 -1 src/sys/dev/dc/if_dcreg.h
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