[SCSI] Add SATA support to libsas
Hook the scsi_host_template functions in libsas to delegate functionality to libata when appropriate. Signed-off-by: Darrick J. Wong <djwong@us.ibm.com> Misc code changes and merge fixes and update for libata->drivers/ata move Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
This commit is contained in:
Darrick J. Wong
James Bottomley
Родитель
8b4a40809e
Коммит
fa1c1e8f1e
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@ -81,6 +81,9 @@ static struct scsi_host_template aic94xx_sht = {
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.use_clustering = ENABLE_CLUSTERING,
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.eh_device_reset_handler = sas_eh_device_reset_handler,
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.eh_bus_reset_handler = sas_eh_bus_reset_handler,
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.slave_alloc = sas_slave_alloc,
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.target_destroy = sas_target_destroy,
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.ioctl = sas_ioctl,
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};
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static int __devinit asd_map_memio(struct asd_ha_struct *asd_ha)
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@ -255,6 +255,7 @@ static int sas_get_port_device(struct asd_sas_port *port)
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switch (dev->dev_type) {
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case SAS_END_DEV:
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case SATA_DEV:
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rphy = sas_end_device_alloc(port->port);
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break;
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case EDGE_DEV:
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@ -265,7 +266,6 @@ static int sas_get_port_device(struct asd_sas_port *port)
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rphy = sas_expander_alloc(port->port,
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SAS_FANOUT_EXPANDER_DEVICE);
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break;
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case SATA_DEV:
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default:
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printk("ERROR: Unidentified device type %d\n", dev->dev_type);
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rphy = NULL;
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@ -480,7 +480,14 @@ cont1:
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present.
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sas_satl_register_dev(dev);
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*/
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return 0;
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sas_fill_in_rphy(dev, dev->rphy);
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res = sas_rphy_add(dev->rphy);
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if (res)
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goto out_err;
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return res;
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out_err:
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dev->sata_dev.identify_packet_device = NULL;
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dev->sata_dev.identify_device = NULL;
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@ -42,6 +42,7 @@
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#include <linux/blkdev.h>
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#include <linux/freezer.h>
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#include <linux/scatterlist.h>
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#include <linux/libata.h>
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/* ---------- SCSI Host glue ---------- */
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@ -192,6 +193,11 @@ static int sas_queue_up(struct sas_task *task)
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return 0;
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}
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static inline int dev_is_sata(struct domain_device *dev)
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{
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return (dev->rphy->identify.target_port_protocols & SAS_PROTOCOL_SATA);
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}
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/**
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* sas_queuecommand -- Enqueue a command for processing
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* @parameters: See SCSI Core documentation
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@ -213,6 +219,12 @@ int sas_queuecommand(struct scsi_cmnd *cmd,
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struct sas_ha_struct *sas_ha = dev->port->ha;
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struct sas_task *task;
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if (dev_is_sata(dev)) {
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res = ata_sas_queuecmd(cmd, scsi_done,
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dev->sata_dev.ap);
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goto out;
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}
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res = -ENOMEM;
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task = sas_create_task(cmd, dev, GFP_ATOMIC);
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if (!task)
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@ -684,6 +696,279 @@ enum scsi_eh_timer_return sas_scsi_timed_out(struct scsi_cmnd *cmd)
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return EH_NOT_HANDLED;
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}
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static enum ata_completion_errors sas_to_ata_err(struct task_status_struct *ts)
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{
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/* Cheesy attempt to translate SAS errors into ATA. Hah! */
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/* transport error */
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if (ts->resp == SAS_TASK_UNDELIVERED)
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return AC_ERR_ATA_BUS;
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/* ts->resp == SAS_TASK_COMPLETE */
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/* task delivered, what happened afterwards? */
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switch (ts->stat) {
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case SAS_DEV_NO_RESPONSE:
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return AC_ERR_TIMEOUT;
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case SAS_INTERRUPTED:
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case SAS_PHY_DOWN:
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case SAS_NAK_R_ERR:
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return AC_ERR_ATA_BUS;
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case SAS_DATA_UNDERRUN:
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/*
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* Some programs that use the taskfile interface
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* (smartctl in particular) can cause underrun
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* problems. Ignore these errors, perhaps at our
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* peril.
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*/
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return 0;
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case SAS_DATA_OVERRUN:
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case SAS_QUEUE_FULL:
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case SAS_DEVICE_UNKNOWN:
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case SAS_SG_ERR:
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return AC_ERR_INVALID;
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case SAM_CHECK_COND:
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case SAS_OPEN_TO:
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case SAS_OPEN_REJECT:
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case SAS_PROTO_RESPONSE:
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SAS_DPRINTK("%s: Saw error %d. What to do?\n",
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__FUNCTION__, ts->stat);
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return AC_ERR_OTHER;
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case SAS_ABORTED_TASK:
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return AC_ERR_DEV;
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default:
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return 0;
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}
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}
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static void sas_ata_task_done(struct sas_task *task)
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{
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struct ata_queued_cmd *qc = task->uldd_task;
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struct domain_device *dev = qc->ap->private_data;
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struct task_status_struct *stat = &task->task_status;
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struct ata_task_resp *resp = (struct ata_task_resp *)stat->buf;
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enum ata_completion_errors ac;
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ac = sas_to_ata_err(stat);
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if (ac) {
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SAS_DPRINTK("%s: SAS error %x\n", __FUNCTION__, stat->stat);
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/* We saw a SAS error. Send a vague error. */
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qc->err_mask = ac;
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dev->sata_dev.tf.feature = 0x04; /* status err */
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dev->sata_dev.tf.command = ATA_ERR;
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goto end;
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}
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ata_tf_from_fis(resp->ending_fis, &dev->sata_dev.tf);
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qc->err_mask |= ac_err_mask(dev->sata_dev.tf.command);
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dev->sata_dev.sstatus = resp->sstatus;
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dev->sata_dev.serror = resp->serror;
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dev->sata_dev.scontrol = resp->scontrol;
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dev->sata_dev.ap->sactive = resp->sactive;
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end:
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ata_qc_complete(qc);
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list_del_init(&task->list);
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sas_free_task(task);
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}
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int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg)
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{
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struct domain_device *dev = sdev_to_domain_dev(sdev);
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if (dev_is_sata(dev))
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return ata_scsi_ioctl(sdev, cmd, arg);
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return -EINVAL;
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}
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static unsigned int sas_ata_qc_issue(struct ata_queued_cmd *qc)
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{
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int res = -ENOMEM;
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struct sas_task *task;
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struct domain_device *dev = qc->ap->private_data;
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struct sas_ha_struct *sas_ha = dev->port->ha;
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struct Scsi_Host *host = sas_ha->core.shost;
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struct sas_internal *i = to_sas_internal(host->transportt);
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struct scatterlist *sg;
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unsigned int num = 0;
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unsigned int xfer = 0;
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task = sas_alloc_task(GFP_ATOMIC);
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if (!task)
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goto out;
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task->dev = dev;
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task->task_proto = SAS_PROTOCOL_STP;
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task->task_done = sas_ata_task_done;
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ata_tf_to_fis(&qc->tf, (u8*)&task->ata_task.fis, 0);
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task->uldd_task = qc;
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if (is_atapi_taskfile(&qc->tf)) {
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memcpy(task->ata_task.atapi_packet, qc->cdb, ATAPI_CDB_LEN);
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task->total_xfer_len = qc->nbytes + qc->pad_len;
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task->num_scatter = qc->pad_len ? qc->n_elem + 1 : qc->n_elem;
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} else {
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ata_for_each_sg(sg, qc) {
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num++;
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xfer += sg->length;
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}
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task->total_xfer_len = xfer;
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task->num_scatter = num;
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}
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task->data_dir = qc->dma_dir;
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task->scatter = qc->__sg;
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task->ata_task.retry_count = 1;
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task->task_state_flags = SAS_TASK_STATE_PENDING;
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if (qc->tf.protocol == ATA_PROT_DMA)
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task->ata_task.dma_xfer = 1;
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if (sas_ha->lldd_max_execute_num < 2)
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res = i->dft->lldd_execute_task(task, 1, GFP_ATOMIC);
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else
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res = sas_queue_up(task);
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/* Examine */
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if (res) {
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SAS_DPRINTK("lldd_execute_task returned: %d\n", res);
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sas_free_task(task);
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if (res == -SAS_QUEUE_FULL)
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return -ENOMEM;
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}
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out:
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return res;
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}
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static u8 sas_ata_check_status(struct ata_port *ap)
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{
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struct domain_device *dev = ap->private_data;
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return dev->sata_dev.tf.command;
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}
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static void sas_ata_phy_reset(struct ata_port *ap)
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{
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struct domain_device *dev = ap->private_data;
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struct sas_internal *i =
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to_sas_internal(dev->port->ha->core.shost->transportt);
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int res = 0;
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if (i->dft->lldd_I_T_nexus_reset)
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res = i->dft->lldd_I_T_nexus_reset(dev);
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if (res)
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SAS_DPRINTK("%s: Unable to reset I T nexus?\n", __FUNCTION__);
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switch (dev->sata_dev.command_set) {
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case ATA_COMMAND_SET:
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SAS_DPRINTK("%s: Found ATA device.\n", __FUNCTION__);
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ap->device[0].class = ATA_DEV_ATA;
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break;
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case ATAPI_COMMAND_SET:
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SAS_DPRINTK("%s: Found ATAPI device.\n", __FUNCTION__);
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ap->device[0].class = ATA_DEV_ATAPI;
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break;
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default:
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SAS_DPRINTK("%s: Unknown SATA command set: %d.\n",
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__FUNCTION__,
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dev->sata_dev.command_set);
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ap->device[0].class = ATA_DEV_ATA;
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break;
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}
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ap->cbl = ATA_CBL_SATA;
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}
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static void sas_ata_post_internal(struct ata_queued_cmd *qc)
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{
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if (qc->flags & ATA_QCFLAG_FAILED)
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qc->err_mask |= AC_ERR_OTHER;
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if (qc->err_mask)
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SAS_DPRINTK("%s: Failure; reset phy!\n", __FUNCTION__);
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}
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static void sas_ata_tf_read(struct ata_port *ap, struct ata_taskfile *tf)
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{
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struct domain_device *dev = ap->private_data;
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memcpy(tf, &dev->sata_dev.tf, sizeof (*tf));
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}
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static void sas_ata_scr_write(struct ata_port *ap, unsigned int sc_reg_in,
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u32 val)
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{
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struct domain_device *dev = ap->private_data;
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SAS_DPRINTK("STUB %s\n", __FUNCTION__);
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switch (sc_reg_in) {
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case SCR_STATUS:
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dev->sata_dev.sstatus = val;
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break;
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case SCR_CONTROL:
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dev->sata_dev.scontrol = val;
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break;
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case SCR_ERROR:
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dev->sata_dev.serror = val;
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break;
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case SCR_ACTIVE:
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dev->sata_dev.ap->sactive = val;
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break;
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}
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}
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static u32 sas_ata_scr_read(struct ata_port *ap, unsigned int sc_reg_in)
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{
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struct domain_device *dev = ap->private_data;
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SAS_DPRINTK("STUB %s\n", __FUNCTION__);
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switch (sc_reg_in) {
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case SCR_STATUS:
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return dev->sata_dev.sstatus;
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case SCR_CONTROL:
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return dev->sata_dev.scontrol;
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case SCR_ERROR:
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return dev->sata_dev.serror;
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case SCR_ACTIVE:
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return dev->sata_dev.ap->sactive;
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default:
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return 0xffffffffU;
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}
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}
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static struct ata_port_operations sas_sata_ops = {
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.port_disable = ata_port_disable,
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.check_status = sas_ata_check_status,
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.check_altstatus = sas_ata_check_status,
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.dev_select = ata_noop_dev_select,
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.phy_reset = sas_ata_phy_reset,
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.post_internal_cmd = sas_ata_post_internal,
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.tf_read = sas_ata_tf_read,
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.qc_prep = ata_noop_qc_prep,
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.qc_issue = sas_ata_qc_issue,
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.port_start = ata_sas_port_start,
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.port_stop = ata_sas_port_stop,
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.scr_read = sas_ata_scr_read,
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.scr_write = sas_ata_scr_write
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};
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static struct ata_port_info sata_port_info = {
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.flags = ATA_FLAG_SATA | ATA_FLAG_NO_LEGACY | ATA_FLAG_SATA_RESET |
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ATA_FLAG_MMIO | ATA_FLAG_PIO_DMA,
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.pio_mask = 0x1f, /* PIO0-4 */
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.mwdma_mask = 0x07, /* MWDMA0-2 */
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.udma_mask = ATA_UDMA6,
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.port_ops = &sas_sata_ops
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};
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struct domain_device *sas_find_dev_by_rphy(struct sas_rphy *rphy)
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{
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struct Scsi_Host *shost = dev_to_shost(rphy->dev.parent);
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@ -722,11 +1007,33 @@ static inline struct domain_device *sas_find_target(struct scsi_target *starget)
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int sas_target_alloc(struct scsi_target *starget)
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{
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struct Scsi_Host *shost = dev_to_shost(&starget->dev);
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struct sas_ha_struct *ha = SHOST_TO_SAS_HA(shost);
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struct domain_device *found_dev = sas_find_target(starget);
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if (!found_dev)
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return -ENODEV;
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if (dev_is_sata(found_dev)) {
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struct ata_port *ap;
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ata_host_init(&found_dev->sata_dev.ata_host,
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&ha->pcidev->dev,
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sata_port_info.flags,
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&sas_sata_ops);
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ap = ata_sas_port_alloc(&found_dev->sata_dev.ata_host,
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&sata_port_info,
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shost);
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if (!ap) {
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SAS_DPRINTK("ata_sas_port_alloc failed.\n");
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return -ENODEV;
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}
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ap->private_data = found_dev;
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ap->cbl = ATA_CBL_SATA;
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found_dev->sata_dev.ap = ap;
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}
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starget->hostdata = found_dev;
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return 0;
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}
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@ -741,6 +1048,11 @@ int sas_slave_configure(struct scsi_device *scsi_dev)
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BUG_ON(dev->rphy->identify.device_type != SAS_END_DEVICE);
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if (dev_is_sata(dev)) {
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ata_sas_slave_configure(scsi_dev, dev->sata_dev.ap);
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return 0;
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}
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sas_ha = dev->port->ha;
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sas_read_port_mode_page(scsi_dev);
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@ -764,6 +1076,10 @@ int sas_slave_configure(struct scsi_device *scsi_dev)
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void sas_slave_destroy(struct scsi_device *scsi_dev)
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{
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struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
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if (dev_is_sata(dev))
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ata_port_disable(dev->sata_dev.ap);
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}
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int sas_change_queue_depth(struct scsi_device *scsi_dev, int new_depth)
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@ -984,6 +1300,29 @@ void sas_task_abort(struct sas_task *task)
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scsi_schedule_eh(sc->device->host);
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}
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int sas_slave_alloc(struct scsi_device *scsi_dev)
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{
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struct domain_device *dev = sdev_to_domain_dev(scsi_dev);
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if (dev_is_sata(dev))
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return ata_sas_port_init(dev->sata_dev.ap);
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return 0;
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}
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void sas_target_destroy(struct scsi_target *starget)
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{
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struct domain_device *found_dev = sas_find_target(starget);
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if (!found_dev)
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return;
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if (dev_is_sata(found_dev))
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ata_sas_port_destroy(found_dev->sata_dev.ap);
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return;
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}
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EXPORT_SYMBOL_GPL(sas_queuecommand);
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EXPORT_SYMBOL_GPL(sas_target_alloc);
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EXPORT_SYMBOL_GPL(sas_slave_configure);
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@ -997,3 +1336,6 @@ EXPORT_SYMBOL_GPL(sas_phy_reset);
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EXPORT_SYMBOL_GPL(sas_phy_enable);
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EXPORT_SYMBOL_GPL(sas_eh_device_reset_handler);
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EXPORT_SYMBOL_GPL(sas_eh_bus_reset_handler);
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EXPORT_SYMBOL_GPL(sas_slave_alloc);
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EXPORT_SYMBOL_GPL(sas_target_destroy);
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EXPORT_SYMBOL_GPL(sas_ioctl);
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@ -30,6 +30,7 @@
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#include <linux/timer.h>
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#include <linux/pci.h>
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#include <scsi/sas.h>
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#include <linux/libata.h>
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#include <linux/list.h>
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#include <asm/semaphore.h>
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#include <scsi/scsi_device.h>
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@ -165,6 +166,13 @@ struct sata_device {
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u8 port_no; /* port number, if this is a PM (Port) */
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struct list_head children; /* PM Ports if this is a PM */
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struct ata_port *ap;
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struct ata_host ata_host;
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struct ata_taskfile tf;
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u32 sstatus;
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u32 serror;
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u32 scontrol;
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};
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/* ---------- Domain device ---------- */
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@ -661,4 +669,8 @@ int __sas_task_abort(struct sas_task *);
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int sas_eh_device_reset_handler(struct scsi_cmnd *cmd);
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int sas_eh_bus_reset_handler(struct scsi_cmnd *cmd);
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extern void sas_target_destroy(struct scsi_target *);
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extern int sas_slave_alloc(struct scsi_device *);
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extern int sas_ioctl(struct scsi_device *sdev, int cmd, void __user *arg);
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#endif /* _SASLIB_H_ */
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