From patchwork Sun Mar 24 23:54:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Christoph Hellwig X-Patchwork-Id: 13601076 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7FE70233AB9; Sun, 24 Mar 2024 23:55:35 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711324538; cv=none; b=OXnIfoJqpJGPSKjiA23AVoVmBbmhgk7EJshP71bBfi6o8LMw/fcbFIwyORbWR71JJ1CykJbp5ZsEAFOilLQM7IoGcmOL7RIkvUyWNm/xIPiz49QOtC0ZGVlc4Opv7zFEkuh9qbw4bbN4oaBUOM6fl4nTMCrtWjhPJRX+C3OuVEU= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1711324538; c=relaxed/simple; bh=Aof4c4s8lPhkEML0LzZufLxJP2khA5b9tNPlsYgdeHA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HJOAqMfyvdhqaZ2pLCiNo7blJ0Kw1Jk9N1xCvxLSJ0WXZ+auhFv6bzxVSdoZgA9aR8s8L6PMRUKcj7hQ3YBx3FwN/RBFURUqu7hq9wHd/VXVQTnxyk2+5WdobePzRqxVhjCq0Yu6Y/LrIUFtPnoTXVU93ddTgHjMiZF0VAU8nqE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=2dDQODCm; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="2dDQODCm" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender :Reply-To:Content-Type:Content-ID:Content-Description; bh=JVG9pbbeeSXQ/roJTY2dlwsI7Lw+oBvV+4eIuCwzqu8=; b=2dDQODCm2Z6K3ZzKpZKdb22gR7 18jx3wucAcYxL19TVwQDhOzDqDvkXOqtlgQL8x5U8cr2Cd5O/5IjWKQV2V5Sj6+w2pJ8/U2P+mWLr qwFZygn8edXEnozwIk4yB/8+t2A/uoDeX1JfSI0EoWSKSvPTDBpy8qaI1+sUoBK17jq9iwcfkGSwm B78EDmfiixp+/IivpffGJ/9NEB5XUKlDZTF5geR6JQVhMRuI6wkY1iddgtrIOEBxCDourUfZAKCXc dWU7h0GF2oWkM0U85xo42IuEpN/pM7br1hrISeTkY3Tqw63wwFz9yfbZXqbSpP8FM43/fJMqSn57h nagYmzSg==; Received: from [210.13.83.2] (helo=localhost) by bombadil.infradead.org with esmtpsa (Exim 4.97.1 #2 (Red Hat Linux)) id 1roXgT-0000000DzTW-02q0; Sun, 24 Mar 2024 23:55:25 +0000 From: Christoph Hellwig To: Jens Axboe , "Martin K. Petersen" Cc: Damien Le Moal , Niklas Cassel , Takashi Sakamoto , Sathya Prakash , Sreekanth Reddy , Suganath Prabu Subramani , "Juergen E. Fischer" , Xiang Chen , HighPoint Linux Team , Tyrel Datwyler , Brian King , Lee Duncan , Chris Leech , Mike Christie , John Garry , Jason Yan , Kashyap Desai , Sumit Saxena , Shivasharan S , Chandrakanth patil , Jack Wang , Nilesh Javali , GR-QLogic-Storage-Upstream@marvell.com, Greg Kroah-Hartman , Alim Akhtar , Avri Altman , Bart Van Assche , Krzysztof Kozlowski , Alan Stern , linux-block@vger.kernel.org, linux-ide@vger.kernel.org, linux1394-devel@lists.sourceforge.net, MPT-FusionLinux.pdl@broadcom.com, linux-scsi@vger.kernel.org, open-iscsi@googlegroups.com, megaraidlinux.pdl@broadcom.com, mpi3mr-linuxdrv.pdl@broadcom.com, linux-samsung-soc@vger.kernel.org, linux-usb@vger.kernel.org, usb-storage@lists.one-eyed-alien.net Subject: [PATCH 06/23] scsi: add a no_highmem flag to struct Scsi_Host Date: Mon, 25 Mar 2024 07:54:31 +0800 Message-Id: <20240324235448.2039074-7-hch@lst.de> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240324235448.2039074-1-hch@lst.de> References: <20240324235448.2039074-1-hch@lst.de> Precedence: bulk X-Mailing-List: linux-scsi@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html While we really should be killing the block layer bounce buffering ASAP, I even more urgently need to stop the drivers to fiddle with the limits from ->slave_configure. Add a no_highmem flag to the Scsi_Host to centralize this setting and switch the remaining four drivers that use block layer bounce buffering to it. Signed-off-by: Christoph Hellwig Reviewed-by: Damien Le Moal Reviewed-by: John Garry --- drivers/scsi/aha152x.c | 8 +------- drivers/scsi/imm.c | 12 +----------- drivers/scsi/ppa.c | 8 +------- drivers/scsi/scsi_lib.c | 3 +++ drivers/usb/storage/scsiglue.c | 10 ---------- drivers/usb/storage/usb.c | 10 ++++++++++ include/scsi/scsi_host.h | 2 ++ 7 files changed, 18 insertions(+), 35 deletions(-) diff --git a/drivers/scsi/aha152x.c b/drivers/scsi/aha152x.c index 055adb349b0e41..83f16fc14d9630 100644 --- a/drivers/scsi/aha152x.c +++ b/drivers/scsi/aha152x.c @@ -746,6 +746,7 @@ struct Scsi_Host *aha152x_probe_one(struct aha152x_setup *setup) /* need to have host registered before triggering any interrupt */ list_add_tail(&HOSTDATA(shpnt)->host_list, &aha152x_host_list); + shpnt->no_highmem = true; shpnt->io_port = setup->io_port; shpnt->n_io_port = IO_RANGE; shpnt->irq = setup->irq; @@ -2940,12 +2941,6 @@ static int aha152x_show_info(struct seq_file *m, struct Scsi_Host *shpnt) return 0; } -static int aha152x_adjust_queue(struct scsi_device *device) -{ - blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH); - return 0; -} - static const struct scsi_host_template aha152x_driver_template = { .module = THIS_MODULE, .name = AHA152X_REVID, @@ -2961,7 +2956,6 @@ static const struct scsi_host_template aha152x_driver_template = { .this_id = 7, .sg_tablesize = SG_ALL, .dma_boundary = PAGE_SIZE - 1, - .slave_alloc = aha152x_adjust_queue, .cmd_size = sizeof(struct aha152x_cmd_priv), }; diff --git a/drivers/scsi/imm.c b/drivers/scsi/imm.c index 180a5ddedb2cda..21339da505f1ea 100644 --- a/drivers/scsi/imm.c +++ b/drivers/scsi/imm.c @@ -1100,16 +1100,6 @@ static int device_check(imm_struct *dev, bool autodetect) return -ENODEV; } -/* - * imm cannot deal with highmem, so this causes all IO pages for this host - * to reside in low memory (hence mapped) - */ -static int imm_adjust_queue(struct scsi_device *device) -{ - blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH); - return 0; -} - static const struct scsi_host_template imm_template = { .module = THIS_MODULE, .proc_name = "imm", @@ -1123,7 +1113,6 @@ static const struct scsi_host_template imm_template = { .this_id = 7, .sg_tablesize = SG_ALL, .can_queue = 1, - .slave_alloc = imm_adjust_queue, .cmd_size = sizeof(struct scsi_pointer), }; @@ -1235,6 +1224,7 @@ static int __imm_attach(struct parport *pb) host = scsi_host_alloc(&imm_template, sizeof(imm_struct *)); if (!host) goto out1; + host->no_highmem = true; host->io_port = pb->base; host->n_io_port = ports; host->dma_channel = -1; diff --git a/drivers/scsi/ppa.c b/drivers/scsi/ppa.c index d592ee9170c11f..8300f0bdddb37a 100644 --- a/drivers/scsi/ppa.c +++ b/drivers/scsi/ppa.c @@ -986,12 +986,6 @@ static int device_check(ppa_struct *dev, bool autodetect) return -ENODEV; } -static int ppa_adjust_queue(struct scsi_device *device) -{ - blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_HIGH); - return 0; -} - static const struct scsi_host_template ppa_template = { .module = THIS_MODULE, .proc_name = "ppa", @@ -1005,7 +999,6 @@ static const struct scsi_host_template ppa_template = { .this_id = -1, .sg_tablesize = SG_ALL, .can_queue = 1, - .slave_alloc = ppa_adjust_queue, .cmd_size = sizeof(struct scsi_pointer), }; @@ -1111,6 +1104,7 @@ static int __ppa_attach(struct parport *pb) host = scsi_host_alloc(&ppa_template, sizeof(ppa_struct *)); if (!host) goto out1; + host->no_highmem = true; host->io_port = pb->base; host->n_io_port = ports; host->dma_channel = -1; diff --git a/drivers/scsi/scsi_lib.c b/drivers/scsi/scsi_lib.c index 1deca84914e87a..f1936f98abe3e2 100644 --- a/drivers/scsi/scsi_lib.c +++ b/drivers/scsi/scsi_lib.c @@ -1995,6 +1995,9 @@ void scsi_init_limits(struct Scsi_Host *shost, struct queue_limits *lim) */ lim->dma_alignment = max(4, dma_get_cache_alignment()) - 1; + if (shost->no_highmem) + lim->bounce = BLK_BOUNCE_HIGH; + dma_set_seg_boundary(dev, shost->dma_boundary); dma_set_max_seg_size(dev, shost->max_segment_size); } diff --git a/drivers/usb/storage/scsiglue.c b/drivers/usb/storage/scsiglue.c index 12cf9940e5b675..1d14c678f3d3e3 100644 --- a/drivers/usb/storage/scsiglue.c +++ b/drivers/usb/storage/scsiglue.c @@ -40,7 +40,6 @@ #include #include "usb.h" -#include #include "scsiglue.h" #include "debug.h" #include "transport.h" @@ -130,15 +129,6 @@ static int slave_configure(struct scsi_device *sdev) min_t(size_t, queue_max_hw_sectors(sdev->request_queue), dma_max_mapping_size(dev) >> SECTOR_SHIFT)); - /* - * Some USB host controllers can't do DMA; they have to use PIO. - * For such controllers we need to make sure the block layer sets - * up bounce buffers in addressable memory. - */ - if (!hcd_uses_dma(bus_to_hcd(us->pusb_dev->bus)) || - (bus_to_hcd(us->pusb_dev->bus)->localmem_pool != NULL)) - blk_queue_bounce_limit(sdev->request_queue, BLK_BOUNCE_HIGH); - /* * We can't put these settings in slave_alloc() because that gets * called before the device type is known. Consequently these diff --git a/drivers/usb/storage/usb.c b/drivers/usb/storage/usb.c index d1ad6a2509ab7f..a49a31639f6f0c 100644 --- a/drivers/usb/storage/usb.c +++ b/drivers/usb/storage/usb.c @@ -47,6 +47,7 @@ #include #include "usb.h" +#include #include "scsiglue.h" #include "transport.h" #include "protocol.h" @@ -961,6 +962,15 @@ int usb_stor_probe1(struct us_data **pus, if (result) goto BadDevice; + /* + * Some USB host controllers can't do DMA; they have to use PIO. + * For such controllers we need to make sure the block layer sets + * up bounce buffers in addressable memory. + */ + if (!hcd_uses_dma(bus_to_hcd(us->pusb_dev->bus)) || + bus_to_hcd(us->pusb_dev->bus)->localmem_pool) + host->no_highmem = true; + /* Get the unusual_devs entries and the descriptors */ result = get_device_info(us, id, unusual_dev); if (result) diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h index b259d42a1e1aff..6d77c48e8311fb 100644 --- a/include/scsi/scsi_host.h +++ b/include/scsi/scsi_host.h @@ -665,6 +665,8 @@ struct Scsi_Host { /* The transport requires the LUN bits NOT to be stored in CDB[1] */ unsigned no_scsi2_lun_in_cdb:1; + unsigned no_highmem:1; + /* * Optional work queue to be utilized by the transport */