From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com ([192.55.52.88]:35944 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750949AbdIMLq4 (ORCPT ); Wed, 13 Sep 2017 07:46:56 -0400 From: Adrian Hunter To: Ulf Hansson Cc: linux-mmc , linux-block , linux-kernel , Bough Chen , Alex Lemberg , Mateusz Nowak , Yuliy Izrailov , Jaehoon Chung , Dong Aisheng , Das Asutosh , Zhangfei Gao , Sahitya Tummala , Harjani Ritesh , Venu Byravarasu , Linus Walleij , Shawn Lin , Christoph Hellwig Subject: [PATCH V8 00/14] mmc: Add Command Queue support Date: Wed, 13 Sep 2017 14:40:00 +0300 Message-Id: <1505302814-19313-1-git-send-email-adrian.hunter@intel.com> Sender: linux-block-owner@vger.kernel.org List-Id: linux-block@vger.kernel.org Hi Here is V8 of the hardware command queue patches without the software command queue patches, now using blk-mq and now with blk-mq support for non-CQE I/O. After the unacceptable debacle of the last release cycle, I expect an immediate response to these patches. HW CMDQ offers 25% - 50% better random multi-threaded I/O. I see a slight 2% drop in sequential read speed but no change to sequential write. Non-CQE blk-mq showed a 3% decrease in sequential read performance. This seemed to be coming from the inferior latency of running work items compared with a dedicated thread. Hacking blk-mq workqueue to be unbound reduced the performance degradation from 3% to 1%. While we should look at changing blk-mq to give better workqueue performance, a bigger gain is likely to be made by adding a new host API to enable the next already-prepared request to be issued directly from within ->done() callback of the current request. Changes since V7: Re-based mmc: core: Introduce host claiming by context Slightly simplified mmc: core: Add parameter use_blk_mq New patch. mmc: core: Remove unnecessary host claim New patch. mmc: core: Export mmc_start_bkops() New patch. mmc: core: Export mmc_start_request() New patch. mmc: block: Add CQE and blk-mq support Add blk-mq support for non_CQE requests Changes since V6: mmc: core: Introduce host claiming by context New patch. mmc: core: Move mmc_start_areq() declaration Dropped because it has been applied mmc: block: Fix block status codes Dropped because it has been applied mmc: host: Add CQE interface Dropped because it has been applied mmc: core: Turn off CQE before sending commands Dropped because it has been applied mmc: block: Factor out mmc_setup_queue() New patch. mmc: block: Add CQE support Drop legacy support and add blk-mq support Changes since V5: Re-based mmc: core: Add mmc_retune_hold_now() Dropped because it has been applied mmc: core: Add members to mmc_request and mmc_data for CQE's Dropped because it has been applied mmc: core: Move mmc_start_areq() declaration New patch at Ulf's request mmc: block: Fix block status codes Another un-related patch mmc: host: Add CQE interface Move recovery_notifier() callback to struct mmc_request mmc: core: Add support for handling CQE requests Roll __mmc_cqe_request_done() into mmc_cqe_request_done() Move function declarations requested by Ulf mmc: core: Remove unused MMC_CAP2_PACKED_CMD Dropped because it has been applied mmc: block: Add CQE support Add explanation to commit message Adjustment for changed recovery_notifier() callback mmc: cqhci: support for command queue enabled host Adjustment for changed recovery_notifier() callback mmc: sdhci-pci: Add CQHCI support for Intel GLK Add DCMD capability for Intel controllers except GLK Changes since V4: mmc: core: Add mmc_retune_hold_now() Add explanation to commit message. mmc: host: Add CQE interface Add comments to callback declarations. mmc: core: Turn off CQE before sending commands Add explanation to commit message. mmc: core: Add support for handling CQE requests Add comments as requested by Ulf. mmc: core: Remove unused MMC_CAP2_PACKED_CMD New patch. mmc: mmc: Enable Command Queuing Adjust for removal of MMC_CAP2_PACKED_CMD. Add a comment about Packed Commands. mmc: mmc: Enable CQE's Remove un-necessary check for MMC_CAP2_CQE mmc: block: Use local variables in mmc_blk_data_prep() New patch. mmc: block: Prepare CQE data Adjust due to "mmc: block: Use local variables in mmc_blk_data_prep()" Remove priority setting. Add explanation to commit message. mmc: cqhci: support for command queue enabled host Fix transfer descriptor setting in cqhci_set_tran_desc() for 32-bit DMA Changes since V3: Adjusted ...blk_end_request...() for new block status codes Fixed CQHCI transaction descriptor for "no DCMD" case Changes since V2: Dropped patches that have been applied. Re-based Added "mmc: sdhci-pci: Add CQHCI support for Intel GLK" Changes since V1: "Share mmc request array between partitions" is dependent on changes in "Introduce queue semantics", so added that and block fixes: Added "Fix is_waiting_last_req set incorrectly" Added "Fix cmd error reset failure path" Added "Use local var for mqrq_cur" Added "Introduce queue semantics" Changes since RFC: Re-based on next. Added comment about command queue priority. Added some acks and reviews. Adrian Hunter (13): mmc: core: Introduce host claiming by context mmc: core: Add support for handling CQE requests mmc: mmc: Enable Command Queuing mmc: mmc: Enable CQE's mmc: block: Use local variables in mmc_blk_data_prep() mmc: block: Prepare CQE data mmc: block: Factor out mmc_setup_queue() mmc: core: Add parameter use_blk_mq mmc: core: Remove unnecessary host claim mmc: core: Export mmc_start_bkops() mmc: core: Export mmc_start_request() mmc: block: Add CQE and blk-mq support mmc: sdhci-pci: Add CQHCI support for Intel GLK Venkat Gopalakrishnan (1): mmc: cqhci: support for command queue enabled host drivers/mmc/Kconfig | 11 + drivers/mmc/core/block.c | 777 ++++++++++++++++++++++++- drivers/mmc/core/block.h | 8 + drivers/mmc/core/bus.c | 7 + drivers/mmc/core/core.c | 265 ++++++++- drivers/mmc/core/core.h | 14 + drivers/mmc/core/host.c | 2 + drivers/mmc/core/host.h | 4 + drivers/mmc/core/mmc.c | 29 + drivers/mmc/core/mmc_ops.c | 6 +- drivers/mmc/core/queue.c | 479 +++++++++++++-- drivers/mmc/core/queue.h | 54 +- drivers/mmc/host/Kconfig | 14 + drivers/mmc/host/Makefile | 1 + drivers/mmc/host/cqhci.c | 1154 +++++++++++++++++++++++++++++++++++++ drivers/mmc/host/cqhci.h | 240 ++++++++ drivers/mmc/host/sdhci-pci-core.c | 154 ++++- include/linux/mmc/host.h | 10 +- 18 files changed, 3146 insertions(+), 83 deletions(-) create mode 100644 drivers/mmc/host/cqhci.c create mode 100644 drivers/mmc/host/cqhci.h Regards Adrian