From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kristen Carlson Accardi Subject: [patch 4/4] libata: send event when AN received Date: Wed, 8 Aug 2007 12:08:38 -0700 Message-ID: <20070808120838.63d2ba1f.kristen.c.accardi@intel.com> References: <20070808190613.616085010@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Return-path: Received: from mga02.intel.com ([134.134.136.20]:52038 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965033AbXHHTL3 (ORCPT ); Wed, 8 Aug 2007 15:11:29 -0400 In-Reply-To: <20070808190613.616085010@localhost.localdomain> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: jeff@garzik.org Cc: James.Bottomley@steeleye.com, linux-ide@vger.kernel.org, linux-scsi@vger.kernel.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, Kristen Carlson Accardi When we get an SDB FIS with the 'N' bit set, we should send an event to user space to indicate that there has been a media change. This will be done via the scsi device. Signed-off-by: Kristen Carlson Accardi Index: 2.6-git/drivers/ata/ahci.c =================================================================== --- 2.6-git.orig/drivers/ata/ahci.c +++ 2.6-git/drivers/ata/ahci.c @@ -1359,6 +1359,28 @@ static void ahci_port_intr(struct ata_po return; } + if (status & PORT_IRQ_SDB_FIS) { + /* + * if this is an ATAPI device with AN turned on, + * then we should interrogate the device to + * determine the cause of the interrupt + * + * for AN - this we should check the SDB FIS + * and find the I and N bits set + */ + const u32 *f = pp->rx_fis + RX_FIS_SDB; + + /* check the 'N' bit in word 0 of the FIS */ + if (f[0] & (1 << 15)) { + int port_addr = ((f[0] & 0x00000f00) >> 8); + struct ata_device *adev; + if (port_addr < ATA_MAX_DEVICES) { + adev = &ap->device[port_addr]; + if (adev->flags & ATA_DFLAG_AN) + ata_scsi_media_change_notify(adev); + } + } + } if (ap->sactive) qc_active = readl(port_mmio + PORT_SCR_ACT); else Index: 2.6-git/include/linux/libata.h =================================================================== --- 2.6-git.orig/include/linux/libata.h +++ 2.6-git/include/linux/libata.h @@ -737,6 +737,7 @@ extern void ata_host_init(struct ata_hos extern int ata_scsi_detect(struct scsi_host_template *sht); extern int ata_scsi_ioctl(struct scsi_device *dev, int cmd, void __user *arg); extern int ata_scsi_queuecmd(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *)); +extern void ata_scsi_media_change_notify(struct ata_device *atadev); extern void ata_sas_port_destroy(struct ata_port *); extern struct ata_port *ata_sas_port_alloc(struct ata_host *, struct ata_port_info *, struct Scsi_Host *); Index: 2.6-git/drivers/ata/libata-scsi.c =================================================================== --- 2.6-git.orig/drivers/ata/libata-scsi.c +++ 2.6-git/drivers/ata/libata-scsi.c @@ -3099,6 +3099,22 @@ static void ata_scsi_remove_dev(struct a } /** + * ata_scsi_media_change_notify - send media change event + * @atadev: Pointer to the disk device with media change event + * + * Tell the block layer to send a media change notification + * event. + * + * LOCKING: + * interrupt context, may not sleep. + */ +void ata_scsi_media_change_notify(struct ata_device *atadev) +{ + scsi_device_event_notify(atadev->sdev, SDEV_MEDIA_CHANGE); +} +EXPORT_SYMBOL_GPL(ata_scsi_media_change_notify); + +/** * ata_scsi_hotplug - SCSI part of hotplug * @work: Pointer to ATA port to perform SCSI hotplug on * --