From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marc C Subject: [PATCH v3 3/3] libata: Add support for queued DSM TRIM Date: Thu, 8 Aug 2013 21:49:12 -0700 Message-ID: <1376023752-3105-4-git-send-email-marc.ceeeee@gmail.com> References: <1376023752-3105-1-git-send-email-marc.ceeeee@gmail.com> Return-path: Received: from mail-oa0-f53.google.com ([209.85.219.53]:61939 "EHLO mail-oa0-f53.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932792Ab3HIEvD (ORCPT ); Fri, 9 Aug 2013 00:51:03 -0400 Received: by mail-oa0-f53.google.com with SMTP id k18so1720200oag.40 for ; Thu, 08 Aug 2013 21:51:03 -0700 (PDT) In-Reply-To: <1376023752-3105-1-git-send-email-marc.ceeeee@gmail.com> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: tj@kernel.org, linux-ide@vger.kernel.org, sergei.shtylyov@cogentembedded.com Cc: Marc Carino From: Marc Carino Some new SSDs support the queued version of the DSM TRIM command. Let the driver use the new command if supported. Signed-off-by: Marc Carino --- drivers/ata/libata-scsi.c | 27 +++++++++++++++++++++------ 1 file changed, 21 insertions(+), 6 deletions(-) diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c index 83c0890..1605ffc 100644 --- a/drivers/ata/libata-scsi.c +++ b/drivers/ata/libata-scsi.c @@ -3098,12 +3098,27 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc) buf = page_address(sg_page(scsi_sglist(scmd))); size = ata_set_lba_range_entries(buf, 512, block, n_block); - tf->protocol = ATA_PROT_DMA; - tf->hob_feature = 0; - tf->feature = ATA_DSM_TRIM; - tf->hob_nsect = (size / 512) >> 8; - tf->nsect = size / 512; - tf->command = ATA_CMD_DSM; + if (ata_ncq_enabled(dev) && + (dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_DSM_OFFSET] & + ATA_LOG_NCQ_SEND_RECV_DSM_TRIM)) { + /* Newer devices support queued TRIM commands */ + tf->protocol = ATA_PROT_NCQ; + tf->command = ATA_CMD_FPDMA_SEND; + tf->hob_nsect = ATA_SUBCMD_FPDMA_SEND_DSM & 0x1f; + tf->nsect = qc->tag << 3; + tf->hob_feature = (size / 512) >> 8; + tf->feature = size / 512; + + qc->auxiliary = 1; + } else { + tf->protocol = ATA_PROT_DMA; + tf->hob_feature = 0; + tf->feature = ATA_DSM_TRIM; + tf->hob_nsect = (size / 512) >> 8; + tf->nsect = size / 512; + tf->command = ATA_CMD_DSM; + } + tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48 | ATA_TFLAG_WRITE; -- 1.8.1.2