From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752259Ab2GZKIr (ORCPT ); Thu, 26 Jul 2012 06:08:47 -0400 Received: from ch1ehsobe006.messaging.microsoft.com ([216.32.181.186]:25415 "EHLO ch1outboundpool.messaging.microsoft.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751582Ab2GZKGS (ORCPT ); Thu, 26 Jul 2012 06:06:18 -0400 X-Forefront-Antispam-Report: CIP:163.181.249.108;KIP:(null);UIP:(null);IPV:NLI;H:ausb3twp01.amd.com;RD:none;EFVD:NLI X-SpamScore: 0 X-BigFish: VPS0(zzzz1202hzz8275bhz2dh668h839hd24he5bhf0ah107ah) X-WSS-ID: 0M7RIQB-01-4HS-02 X-M-MSG: From: Aaron Lu To: James Bottomley , Alan Stern CC: Jeff Garzik , Lin Ming , Jeff Wu , , , , , Aaron Lu , Aaron Lu Subject: [PATCH v3 1/7] scsi: sr: check support for device busy class events Date: Thu, 26 Jul 2012 18:05:23 +0800 Message-ID: <1343297129-28174-2-git-send-email-aaron.lu@amd.com> X-Mailer: git-send-email 1.7.11.3 In-Reply-To: <1343297129-28174-1-git-send-email-aaron.lu@amd.com> References: <1343297129-28174-1-git-send-email-aaron.lu@amd.com> X-OriginalArrivalTime: 26 Jul 2012 10:05:58.0456 (UTC) FILETIME=[40D1DB80:01CD6B16] MIME-Version: 1.0 Content-Type: text/plain X-OriginatorOrg: amd.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Aaron Lu --- drivers/scsi/sr.c | 23 +++++++++++++++++++++++ drivers/scsi/sr.h | 1 + include/linux/cdrom.h | 43 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 67 insertions(+) diff --git a/drivers/scsi/sr.c b/drivers/scsi/sr.c index 5fc97d2..abfefab 100644 --- a/drivers/scsi/sr.c +++ b/drivers/scsi/sr.c @@ -101,6 +101,7 @@ static DEFINE_MUTEX(sr_ref_mutex); static int sr_open(struct cdrom_device_info *, int); static void sr_release(struct cdrom_device_info *); +static void check_dbml(struct scsi_cd *); static void get_sectorsize(struct scsi_cd *); static void get_capabilities(struct scsi_cd *); @@ -728,6 +729,28 @@ fail: return error; } +static void check_dbml(struct scsi_cd *cd) +{ + struct packet_command cgc; + unsigned char buffer[16]; + struct rm_feature_desc *rfd; + + init_cdrom_command(&cgc, buffer, sizeof(buffer), CGC_DATA_READ); + cgc.cmd[0] = GPCMD_GET_CONFIGURATION; + cgc.cmd[3] = CDF_RM; + cgc.cmd[8] = sizeof(buffer); + cgc.quiet = 1; + + if (cd->cdi.ops->generic_packet(&cd->cdi, &cgc)) + return; + + rfd = (struct rm_feature_desc *)&buffer[sizeof(struct feature_header)]; + if (be16_to_cpu(rfd->feature_code) != CDF_RM) + return; + + if (rfd->dbml) + cd->dbml = 1; +} static void get_sectorsize(struct scsi_cd *cd) { diff --git a/drivers/scsi/sr.h b/drivers/scsi/sr.h index 37c8f6b..7cc40ad 100644 --- a/drivers/scsi/sr.h +++ b/drivers/scsi/sr.h @@ -41,6 +41,7 @@ typedef struct scsi_cd { unsigned readcd_known:1; /* drive supports READ_CD (0xbe) */ unsigned readcd_cdda:1; /* reading audio data using READ_CD */ unsigned media_present:1; /* media is present */ + unsigned dbml:1; /* generates device busy class events */ /* GET_EVENT spurious event handling, blk layer guarantees exclusion */ int tur_mismatch; /* nr of get_event TUR mismatches */ diff --git a/include/linux/cdrom.h b/include/linux/cdrom.h index dfd7f18..962be39 100644 --- a/include/linux/cdrom.h +++ b/include/linux/cdrom.h @@ -727,6 +727,7 @@ struct request_sense { /* * feature profile */ +#define CDF_RM 0x0003 /* "Removable Medium" */ #define CDF_RWRT 0x0020 /* "Random Writable" */ #define CDF_HWDM 0x0024 /* "Hardware Defect Management" */ #define CDF_MRW 0x0028 @@ -739,6 +740,48 @@ struct request_sense { #define CDM_MRW_BGFORMAT_ACTIVE 2 #define CDM_MRW_BGFORMAT_COMPLETE 3 +/* Removable medium feature descriptor */ +struct rm_feature_desc { + __be16 feature_code; +#if defined(__BIG_ENDIAN_BITFIELD) + __u8 reserved1 : 2; + __u8 feature_version : 4; + __u8 persistent : 1; + __u8 curr : 1; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + __u8 curr : 1; + __u8 persistent : 1; + __u8 feature_version : 4; + __u8 reserved1 : 2; +#endif + __u8 add_len; +#if defined(__BIG_ENDIAN_BITFIELD) + __u8 mech_type : 3; + __u8 load : 1; + __u8 eject : 1; + __u8 pvnt_jmpr : 1; + __u8 dbml : 1; + __u8 lock : 1; +#elif defined(__LITTLE_ENDIAN_BITFIELD) + __u8 lock : 1; + __u8 dbml : 1; + __u8 pvnt_jmpr : 1; + __u8 eject : 1; + __u8 load : 1; + __u8 mech_type : 3; +#endif + __u8 reserved2; + __u8 reserved3; + __u8 reserved4; +}; + +struct device_busy_event_desc { + __u8 device_busy_event : 4; + __u8 reserved1 : 4; + __u8 device_busy_status; + __u8 time; +}; + /* * mrw address spaces */ -- 1.7.11.3