From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shaun Tancheff Subject: Re: [PATCH 2/4] libata: Implement ZBC OUT translation Date: Mon, 4 Apr 2016 20:08:32 +0700 Message-ID: References: <1459763271-125856-1-git-send-email-hare@suse.de> <1459763271-125856-3-git-send-email-hare@suse.de> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Return-path: In-Reply-To: <1459763271-125856-3-git-send-email-hare@suse.de> Sender: linux-scsi-owner@vger.kernel.org To: Hannes Reinecke Cc: Tejun Heo , linux-ide@vger.kernel.org, "Martin K. Petersen" , Christoph Hellwig , Damien Le Moal , linux-scsi@vger.kernel.org, Sathya Prakash List-Id: linux-ide@vger.kernel.org On Mon, Apr 4, 2016 at 4:47 PM, Hannes Reinecke wrote: > ZAC drives implement a 'zac management out' command template, > which maps onto the ZBC OUT command. > > Signed-off-by: Hannes Reinecke > --- > drivers/ata/libata-eh.c | 1 + > drivers/ata/libata-scsi.c | 73 +++++++++++++++++++++++++++++++++++++++++++ > include/linux/ata.h | 7 +++++ > include/trace/events/libata.h | 1 + > 4 files changed, 82 insertions(+) > > diff --git a/drivers/ata/libata-eh.c b/drivers/ata/libata-eh.c > index e947bd5..ee984f9 100644 > --- a/drivers/ata/libata-eh.c > +++ b/drivers/ata/libata-eh.c > @@ -2481,6 +2481,7 @@ const char *ata_get_cmd_descript(u8 command) > { ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" }, > { ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" }, > { ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" }, > + { ATA_CMD_ZAC_MGMT_OUT, "ZAC MANAGEMENT OUT" }, > { ATA_CMD_READ_LONG, "READ LONG (with retries)" }, > { ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" }, > { ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" }, > diff --git a/drivers/ata/libata-scsi.c b/drivers/ata/libata-scsi.c > index 21c2b40..6db2aaf 100644 > --- a/drivers/ata/libata-scsi.c > +++ b/drivers/ata/libata-scsi.c > @@ -3451,6 +3451,76 @@ invalid_param_len: > return 1; > } > > +static unsigned int ata_scsi_zbc_out_xlat(struct ata_queued_cmd *qc) > +{ > + struct ata_taskfile *tf = &qc->tf; > + struct scsi_cmnd *scmd = qc->scsicmd; > + struct ata_device *dev = qc->dev; > + const u8 *cdb = scmd->cmnd; > + u8 reset_all, sa; > + u64 block; > + u32 n_block; > + u16 fp = (u16)-1; > + > + if (unlikely(scmd->cmd_len < 16)) { > + fp = 15; > + goto invalid_fld; > + } > + > + /* > + * The service action definition got moved from > + * 0x00 to 0x04 with zbc-r02, so accept both. > + */ > + sa = cdb[1] & 0x1f; > + /* Compatibility with ZBC r01 */ > + if (!sa) > + sa = ZO_RESET_WRITE_POINTER; I think we can support the remaining zone commands here: if (!(sa == ZO_CLOSE_ZONE || sa == ZO_FINISH_ZONE || sa == ZO_OPEN_ZONE || sa == ZO_RESET_WRITE_POINTER)) { ... > + if (sa != ZO_RESET_WRITE_POINTER) { > + fp = 1; > + goto invalid_fld; > + } > + > + scsi_16_lba_len(cdb, &block, &n_block); > + if (n_block) { > + /* > + * ZAC MANAGEMENT OUT doesn't define any length > + */ > + goto invalid_param_len; > + } > + if (block > dev->n_sectors) > + goto out_of_range; > + > + reset_all = cdb[14] & 0x1; > + > + tf->protocol = ATA_PROT_NODATA; > + tf->command = ATA_CMD_ZAC_MGMT_OUT; > + tf->feature = sa; > + tf->hob_feature = reset_all & 0x1; > + > + tf->lbah = (block >> 16) & 0xff; > + tf->lbam = (block >> 8) & 0xff; > + tf->lbal = block & 0xff; > + tf->hob_lbah = (block >> 40) & 0xff; > + tf->hob_lbam = (block >> 32) & 0xff; > + tf->hob_lbal = (block >> 24) & 0xff; > + tf->device = ATA_LBA; > + tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48; > + > + return 0; > + > + invalid_fld: > + ata_scsi_set_invalid_field(qc->dev, scmd, fp, 0xff); > + return 1; > + out_of_range: > + /* "Logical Block Address out of range" */ > + ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x21, 0x00); > + return 1; > +invalid_param_len: > + /* "Parameter list length error" */ > + ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0); > + return 1; > +} > + > /** > * ata_mselect_caching - Simulate MODE SELECT for caching info page > * @qc: Storage for translated ATA taskfile > @@ -3767,6 +3837,9 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd) > case ZBC_IN: > return ata_scsi_zbc_in_xlat; > > + case ZBC_OUT: > + return ata_scsi_zbc_out_xlat; > + > case START_STOP: > return ata_scsi_start_stop_xlat; > } > diff --git a/include/linux/ata.h b/include/linux/ata.h > index 2e4a6af..eef9d80 100644 > --- a/include/linux/ata.h > +++ b/include/linux/ata.h > @@ -302,6 +302,7 @@ enum { > ATA_CMD_REQ_SENSE_DATA = 0x0B, > ATA_CMD_SANITIZE_DEVICE = 0xB4, > ATA_CMD_ZAC_MGMT_IN = 0x4A, > + ATA_CMD_ZAC_MGMT_OUT = 0x9F, > > /* marked obsolete in the ATA/ATAPI-7 spec */ > ATA_CMD_RESTORE = 0x10, > @@ -313,6 +314,12 @@ enum { > /* Subcmds for ATA_CMD_ZAC_MGMT_IN */ > ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES = 0x00, > > + /* Subcmds for ATA_CMD_ZAC_MGMT_OUT */ > + ATA_SUBCMD_ZAC_MGMT_OUT_CLOSE_ZONE = 0x01, > + ATA_SUBCMD_ZAC_MGMT_OUT_FINISH_ZONE = 0x02, > + ATA_SUBCMD_ZAC_MGMT_OUT_OPEN_ZONE = 0x03, > + ATA_SUBCMD_ZAC_MGMT_OUT_RESET_WRITE_POINTER = 0x04, > + > /* READ_LOG_EXT pages */ > ATA_LOG_SATA_NCQ = 0x10, > ATA_LOG_NCQ_SEND_RECV = 0x13, > diff --git a/include/trace/events/libata.h b/include/trace/events/libata.h > index 02ec4e5..24dcd43 100644 > --- a/include/trace/events/libata.h > +++ b/include/trace/events/libata.h > @@ -98,6 +98,7 @@ > ata_opcode_name(ATA_CMD_REQ_SENSE_DATA), \ > ata_opcode_name(ATA_CMD_SANITIZE_DEVICE), \ > ata_opcode_name(ATA_CMD_ZAC_MGMT_IN), \ > + ata_opcode_name(ATA_CMD_ZAC_MGMT_OUT), \ > ata_opcode_name(ATA_CMD_RESTORE), \ > ata_opcode_name(ATA_CMD_READ_LONG), \ > ata_opcode_name(ATA_CMD_READ_LONG_ONCE), \ > -- > 1.8.5.6 > -- Shaun Tancheff