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path: root/drivers/scsi/mpt3sas/mpt3sas_scsih.c
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Diffstat (limited to 'drivers/scsi/mpt3sas/mpt3sas_scsih.c')
-rw-r--r--drivers/scsi/mpt3sas/mpt3sas_scsih.c163
1 files changed, 130 insertions, 33 deletions
diff --git a/drivers/scsi/mpt3sas/mpt3sas_scsih.c b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
index 1c4744e78173..b5c966e319d3 100644
--- a/drivers/scsi/mpt3sas/mpt3sas_scsih.c
+++ b/drivers/scsi/mpt3sas/mpt3sas_scsih.c
@@ -423,7 +423,7 @@ _scsih_get_sas_address(struct MPT3SAS_ADAPTER *ioc, u16 handle,
return 0;
}
- /* we hit this becuase the given parent handle doesn't exist */
+ /* we hit this because the given parent handle doesn't exist */
if (ioc_status == MPI2_IOCSTATUS_CONFIG_INVALID_PAGE)
return -ENXIO;
@@ -788,6 +788,11 @@ _scsih_sas_device_add(struct MPT3SAS_ADAPTER *ioc,
list_add_tail(&sas_device->list, &ioc->sas_device_list);
spin_unlock_irqrestore(&ioc->sas_device_lock, flags);
+ if (ioc->hide_drives) {
+ clear_bit(sas_device->handle, ioc->pend_os_device_add);
+ return;
+ }
+
if (!mpt3sas_transport_port_add(ioc, sas_device->handle,
sas_device->sas_address_parent)) {
_scsih_sas_device_remove(ioc, sas_device);
@@ -803,7 +808,8 @@ _scsih_sas_device_add(struct MPT3SAS_ADAPTER *ioc,
sas_device->sas_address_parent);
_scsih_sas_device_remove(ioc, sas_device);
}
- }
+ } else
+ clear_bit(sas_device->handle, ioc->pend_os_device_add);
}
/**
@@ -1517,7 +1523,7 @@ _scsih_display_sata_capabilities(struct MPT3SAS_ADAPTER *ioc,
/*
* raid transport support -
* Enabled for SLES11 and newer, in older kernels the driver will panic when
- * unloading the driver followed by a load - I beleive that the subroutine
+ * unloading the driver followed by a load - I believe that the subroutine
* raid_class_release() is not cleaning up properly.
*/
@@ -2279,7 +2285,7 @@ mpt3sas_scsih_issue_tm(struct MPT3SAS_ADAPTER *ioc, u16 handle, uint channel,
msix_task = scsi_lookup->msix_io;
else
msix_task = 0;
- mpt3sas_base_put_smid_hi_priority(ioc, smid, msix_task);
+ ioc->put_smid_hi_priority(ioc, smid, msix_task);
wait_for_completion_timeout(&ioc->tm_cmds.done, timeout*HZ);
if (!(ioc->tm_cmds.status & MPT3_CMD_COMPLETE)) {
pr_err(MPT3SAS_FMT "%s: timeout\n",
@@ -2837,7 +2843,7 @@ _scsih_internal_device_block(struct scsi_device *sdev,
if (r == -EINVAL)
sdev_printk(KERN_WARNING, sdev,
"device_block failed with return(%d) for handle(0x%04x)\n",
- sas_device_priv_data->sas_target->handle, r);
+ r, sas_device_priv_data->sas_target->handle);
}
/**
@@ -2867,20 +2873,20 @@ _scsih_internal_device_unblock(struct scsi_device *sdev,
sdev_printk(KERN_WARNING, sdev,
"device_unblock failed with return(%d) for handle(0x%04x) "
"performing a block followed by an unblock\n",
- sas_device_priv_data->sas_target->handle, r);
+ r, sas_device_priv_data->sas_target->handle);
sas_device_priv_data->block = 1;
r = scsi_internal_device_block(sdev);
if (r)
sdev_printk(KERN_WARNING, sdev, "retried device_block "
"failed with return(%d) for handle(0x%04x)\n",
- sas_device_priv_data->sas_target->handle, r);
+ r, sas_device_priv_data->sas_target->handle);
sas_device_priv_data->block = 0;
r = scsi_internal_device_unblock(sdev, SDEV_RUNNING);
if (r)
sdev_printk(KERN_WARNING, sdev, "retried device_unblock"
" failed with return(%d) for handle(0x%04x)\n",
- sas_device_priv_data->sas_target->handle, r);
+ r, sas_device_priv_data->sas_target->handle);
}
}
@@ -2942,7 +2948,7 @@ _scsih_ublock_io_device(struct MPT3SAS_ADAPTER *ioc, u64 sas_address)
* @ioc: per adapter object
* @handle: device handle
*
- * During device pull we need to appropiately set the sdev state.
+ * During device pull we need to appropriately set the sdev state.
*/
static void
_scsih_block_io_all_device(struct MPT3SAS_ADAPTER *ioc)
@@ -2971,7 +2977,7 @@ _scsih_block_io_all_device(struct MPT3SAS_ADAPTER *ioc)
* @ioc: per adapter object
* @handle: device handle
*
- * During device pull we need to appropiately set the sdev state.
+ * During device pull we need to appropriately set the sdev state.
*/
static void
_scsih_block_io_device(struct MPT3SAS_ADAPTER *ioc, u16 handle)
@@ -3138,6 +3144,8 @@ _scsih_tm_tr_send(struct MPT3SAS_ADAPTER *ioc, u16 handle)
if (test_bit(handle, ioc->pd_handles))
return;
+ clear_bit(handle, ioc->pend_os_device_add);
+
spin_lock_irqsave(&ioc->sas_device_lock, flags);
sas_device = __mpt3sas_get_sdev_by_handle(ioc, handle);
if (sas_device && sas_device->starget &&
@@ -3192,7 +3200,8 @@ _scsih_tm_tr_send(struct MPT3SAS_ADAPTER *ioc, u16 handle)
mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
mpi_request->DevHandle = cpu_to_le16(handle);
mpi_request->TaskType = MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET;
- mpt3sas_base_put_smid_hi_priority(ioc, smid, 0);
+ set_bit(handle, ioc->device_remove_in_progress);
+ ioc->put_smid_hi_priority(ioc, smid, 0);
mpt3sas_trigger_master(ioc, MASTER_TRIGGER_DEVICE_REMOVAL);
out:
@@ -3291,7 +3300,7 @@ _scsih_tm_tr_complete(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index,
mpi_request->Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
mpi_request->Operation = MPI2_SAS_OP_REMOVE_DEVICE;
mpi_request->DevHandle = mpi_request_tm->DevHandle;
- mpt3sas_base_put_smid_default(ioc, smid_sas_ctrl);
+ ioc->put_smid_default(ioc, smid_sas_ctrl);
return _scsih_check_for_pending_tm(ioc, smid);
}
@@ -3326,6 +3335,11 @@ _scsih_sas_control_complete(struct MPT3SAS_ADAPTER *ioc, u16 smid,
ioc->name, le16_to_cpu(mpi_reply->DevHandle), smid,
le16_to_cpu(mpi_reply->IOCStatus),
le32_to_cpu(mpi_reply->IOCLogInfo)));
+ if (le16_to_cpu(mpi_reply->IOCStatus) ==
+ MPI2_IOCSTATUS_SUCCESS) {
+ clear_bit(le16_to_cpu(mpi_reply->DevHandle),
+ ioc->device_remove_in_progress);
+ }
} else {
pr_err(MPT3SAS_FMT "mpi_reply not valid at %s:%d/%s()!\n",
ioc->name, __FILE__, __LINE__, __func__);
@@ -3381,7 +3395,7 @@ _scsih_tm_tr_volume_send(struct MPT3SAS_ADAPTER *ioc, u16 handle)
mpi_request->Function = MPI2_FUNCTION_SCSI_TASK_MGMT;
mpi_request->DevHandle = cpu_to_le16(handle);
mpi_request->TaskType = MPI2_SCSITASKMGMT_TASKTYPE_TARGET_RESET;
- mpt3sas_base_put_smid_hi_priority(ioc, smid, 0);
+ ioc->put_smid_hi_priority(ioc, smid, 0);
}
/**
@@ -3473,7 +3487,7 @@ _scsih_issue_delayed_event_ack(struct MPT3SAS_ADAPTER *ioc, u16 smid, u16 event,
ack_request->EventContext = event_context;
ack_request->VF_ID = 0; /* TODO */
ack_request->VP_ID = 0;
- mpt3sas_base_put_smid_default(ioc, smid);
+ ioc->put_smid_default(ioc, smid);
}
/**
@@ -3530,7 +3544,7 @@ _scsih_issue_delayed_sas_io_unit_ctrl(struct MPT3SAS_ADAPTER *ioc,
mpi_request->Function = MPI2_FUNCTION_SAS_IO_UNIT_CONTROL;
mpi_request->Operation = MPI2_SAS_OP_REMOVE_DEVICE;
mpi_request->DevHandle = handle;
- mpt3sas_base_put_smid_default(ioc, smid);
+ ioc->put_smid_default(ioc, smid);
}
/**
@@ -3930,7 +3944,7 @@ _scsih_flush_running_cmds(struct MPT3SAS_ADAPTER *ioc)
* _scsih_setup_eedp - setup MPI request for EEDP transfer
* @ioc: per adapter object
* @scmd: pointer to scsi command object
- * @mpi_request: pointer to the SCSI_IO reqest message frame
+ * @mpi_request: pointer to the SCSI_IO request message frame
*
* Supporting protection 1 and 3.
*
@@ -3983,6 +3997,9 @@ _scsih_setup_eedp(struct MPT3SAS_ADAPTER *ioc, struct scsi_cmnd *scmd,
mpi_request_3v->EEDPBlockSize =
cpu_to_le16(scmd->device->sector_size);
+
+ if (ioc->is_gen35_ioc)
+ eedp_flags |= MPI25_SCSIIO_EEDPFLAGS_APPTAG_DISABLE_MODE;
mpi_request->EEDPFlags = cpu_to_le16(eedp_flags);
}
@@ -4036,6 +4053,8 @@ scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
struct MPT3SAS_DEVICE *sas_device_priv_data;
struct MPT3SAS_TARGET *sas_target_priv_data;
struct _raid_device *raid_device;
+ struct request *rq = scmd->request;
+ int class;
Mpi2SCSIIORequest_t *mpi_request;
u32 mpi_control;
u16 smid;
@@ -4084,7 +4103,7 @@ scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
scmd->result = DID_NO_CONNECT << 16;
scmd->scsi_done(scmd);
return 0;
- /* device busy with task managment */
+ /* device busy with task management */
} else if (sas_target_priv_data->tm_busy ||
sas_device_priv_data->block)
return SCSI_MLQUEUE_DEVICE_BUSY;
@@ -4098,7 +4117,12 @@ scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
/* set tags */
mpi_control |= MPI2_SCSIIO_CONTROL_SIMPLEQ;
-
+ /* NCQ Prio supported, make sure control indicated high priority */
+ if (sas_device_priv_data->ncq_prio_enable) {
+ class = IOPRIO_PRIO_CLASS(req_get_ioprio(rq));
+ if (class == IOPRIO_CLASS_RT)
+ mpi_control |= 1 << MPI2_SCSIIO_CONTROL_CMDPRI_SHIFT;
+ }
/* Make sure Device is not raid volume.
* We do not expose raid functionality to upper layer for warpdrive.
*/
@@ -4154,12 +4178,12 @@ scsih_qcmd(struct Scsi_Host *shost, struct scsi_cmnd *scmd)
if (sas_target_priv_data->flags & MPT_TARGET_FASTPATH_IO) {
mpi_request->IoFlags = cpu_to_le16(scmd->cmd_len |
MPI25_SCSIIO_IOFLAGS_FAST_PATH);
- mpt3sas_base_put_smid_fast_path(ioc, smid, handle);
+ ioc->put_smid_fast_path(ioc, smid, handle);
} else
- mpt3sas_base_put_smid_scsi_io(ioc, smid,
+ ioc->put_smid_scsi_io(ioc, smid,
le16_to_cpu(mpi_request->DevHandle));
} else
- mpt3sas_base_put_smid_default(ioc, smid);
+ ioc->put_smid_default(ioc, smid);
return 0;
out:
@@ -4658,7 +4682,7 @@ _scsih_io_done(struct MPT3SAS_ADAPTER *ioc, u16 smid, u8 msix_index, u32 reply)
memcpy(mpi_request->CDB.CDB32, scmd->cmnd, scmd->cmd_len);
mpi_request->DevHandle =
cpu_to_le16(sas_device_priv_data->sas_target->handle);
- mpt3sas_base_put_smid_scsi_io(ioc, smid,
+ ioc->put_smid_scsi_io(ioc, smid,
sas_device_priv_data->sas_target->handle);
return 0;
}
@@ -5383,10 +5407,10 @@ _scsih_check_device(struct MPT3SAS_ADAPTER *ioc,
sas_device->handle, handle);
sas_target_priv_data->handle = handle;
sas_device->handle = handle;
- if (sas_device_pg0.Flags &
+ if (le16_to_cpu(sas_device_pg0.Flags) &
MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
sas_device->enclosure_level =
- le16_to_cpu(sas_device_pg0.EnclosureLevel);
+ sas_device_pg0.EnclosureLevel;
memcpy(sas_device->connector_name,
sas_device_pg0.ConnectorName, 4);
sas_device->connector_name[4] = '\0';
@@ -5465,6 +5489,7 @@ _scsih_add_device(struct MPT3SAS_ADAPTER *ioc, u16 handle, u8 phy_num,
device_info = le32_to_cpu(sas_device_pg0.DeviceInfo);
if (!(_scsih_is_end_device(device_info)))
return -1;
+ set_bit(handle, ioc->pend_os_device_add);
sas_address = le64_to_cpu(sas_device_pg0.SASAddress);
/* check if device is present */
@@ -5483,6 +5508,7 @@ _scsih_add_device(struct MPT3SAS_ADAPTER *ioc, u16 handle, u8 phy_num,
sas_device = mpt3sas_get_sdev_by_addr(ioc,
sas_address);
if (sas_device) {
+ clear_bit(handle, ioc->pend_os_device_add);
sas_device_put(sas_device);
return -1;
}
@@ -5513,9 +5539,10 @@ _scsih_add_device(struct MPT3SAS_ADAPTER *ioc, u16 handle, u8 phy_num,
sas_device->fast_path = (le16_to_cpu(sas_device_pg0.Flags) &
MPI25_SAS_DEVICE0_FLAGS_FAST_PATH_CAPABLE) ? 1 : 0;
- if (sas_device_pg0.Flags & MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
+ if (le16_to_cpu(sas_device_pg0.Flags)
+ & MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
sas_device->enclosure_level =
- le16_to_cpu(sas_device_pg0.EnclosureLevel);
+ sas_device_pg0.EnclosureLevel;
memcpy(sas_device->connector_name,
sas_device_pg0.ConnectorName, 4);
sas_device->connector_name[4] = '\0';
@@ -5806,6 +5833,9 @@ _scsih_sas_topology_change_event(struct MPT3SAS_ADAPTER *ioc,
_scsih_check_device(ioc, sas_address, handle,
phy_number, link_rate);
+ if (!test_bit(handle, ioc->pend_os_device_add))
+ break;
+
case MPI2_EVENT_SAS_TOPO_RC_TARG_ADDED:
@@ -6267,7 +6297,7 @@ _scsih_ir_fastpath(struct MPT3SAS_ADAPTER *ioc, u16 handle, u8 phys_disk_num)
handle, phys_disk_num));
init_completion(&ioc->scsih_cmds.done);
- mpt3sas_base_put_smid_default(ioc, smid);
+ ioc->put_smid_default(ioc, smid);
wait_for_completion_timeout(&ioc->scsih_cmds.done, 10*HZ);
if (!(ioc->scsih_cmds.status & MPT3_CMD_COMPLETE)) {
@@ -6320,7 +6350,7 @@ _scsih_reprobe_lun(struct scsi_device *sdev, void *no_uld_attach)
{
sdev->no_uld_attach = no_uld_attach ? 1 : 0;
sdev_printk(KERN_INFO, sdev, "%s raid component\n",
- sdev->no_uld_attach ? "hidding" : "exposing");
+ sdev->no_uld_attach ? "hiding" : "exposing");
WARN_ON(scsi_device_reprobe(sdev));
}
@@ -7050,7 +7080,7 @@ Mpi2SasDevicePage0_t *sas_device_pg0)
if (sas_device_pg0->Flags &
MPI2_SAS_DEVICE0_FLAGS_ENCL_LEVEL_VALID) {
sas_device->enclosure_level =
- le16_to_cpu(sas_device_pg0->EnclosureLevel);
+ sas_device_pg0->EnclosureLevel;
memcpy(&sas_device->connector_name[0],
&sas_device_pg0->ConnectorName[0], 4);
} else {
@@ -7112,6 +7142,7 @@ _scsih_search_responding_sas_devices(struct MPT3SAS_ADAPTER *ioc)
sas_device_pg0.SASAddress =
le64_to_cpu(sas_device_pg0.SASAddress);
sas_device_pg0.Slot = le16_to_cpu(sas_device_pg0.Slot);
+ sas_device_pg0.Flags = le16_to_cpu(sas_device_pg0.Flags);
_scsih_mark_responding_sas_device(ioc, &sas_device_pg0);
}
@@ -7723,6 +7754,9 @@ mpt3sas_scsih_reset_handler(struct MPT3SAS_ADAPTER *ioc, int reset_phase)
complete(&ioc->tm_cmds.done);
}
+ memset(ioc->pend_os_device_add, 0, ioc->pend_os_device_add_sz);
+ memset(ioc->device_remove_in_progress, 0,
+ ioc->device_remove_in_progress_sz);
_scsih_fw_event_cleanup_queue(ioc);
_scsih_flush_running_cmds(ioc);
break;
@@ -8113,7 +8147,7 @@ _scsih_ir_shutdown(struct MPT3SAS_ADAPTER *ioc)
if (!ioc->hide_ir_msg)
pr_info(MPT3SAS_FMT "IR shutdown (sending)\n", ioc->name);
init_completion(&ioc->scsih_cmds.done);
- mpt3sas_base_put_smid_default(ioc, smid);
+ ioc->put_smid_default(ioc, smid);
wait_for_completion_timeout(&ioc->scsih_cmds.done, 10*HZ);
if (!(ioc->scsih_cmds.status & MPT3_CMD_COMPLETE)) {
@@ -8654,6 +8688,12 @@ _scsih_determine_hba_mpi_version(struct pci_dev *pdev)
case MPI26_MFGPAGE_DEVID_SAS3324_2:
case MPI26_MFGPAGE_DEVID_SAS3324_3:
case MPI26_MFGPAGE_DEVID_SAS3324_4:
+ case MPI26_MFGPAGE_DEVID_SAS3508:
+ case MPI26_MFGPAGE_DEVID_SAS3508_1:
+ case MPI26_MFGPAGE_DEVID_SAS3408:
+ case MPI26_MFGPAGE_DEVID_SAS3516:
+ case MPI26_MFGPAGE_DEVID_SAS3516_1:
+ case MPI26_MFGPAGE_DEVID_SAS3416:
return MPI26_VERSION;
}
return 0;
@@ -8722,10 +8762,29 @@ _scsih_probe(struct pci_dev *pdev, const struct pci_device_id *id)
ioc->hba_mpi_version_belonged = hba_mpi_version;
ioc->id = mpt3_ids++;
sprintf(ioc->driver_name, "%s", MPT3SAS_DRIVER_NAME);
+ switch (pdev->device) {
+ case MPI26_MFGPAGE_DEVID_SAS3508:
+ case MPI26_MFGPAGE_DEVID_SAS3508_1:
+ case MPI26_MFGPAGE_DEVID_SAS3408:
+ case MPI26_MFGPAGE_DEVID_SAS3516:
+ case MPI26_MFGPAGE_DEVID_SAS3516_1:
+ case MPI26_MFGPAGE_DEVID_SAS3416:
+ ioc->is_gen35_ioc = 1;
+ break;
+ default:
+ ioc->is_gen35_ioc = 0;
+ }
if ((ioc->hba_mpi_version_belonged == MPI25_VERSION &&
pdev->revision >= SAS3_PCI_DEVICE_C0_REVISION) ||
- (ioc->hba_mpi_version_belonged == MPI26_VERSION))
- ioc->msix96_vector = 1;
+ (ioc->hba_mpi_version_belonged == MPI26_VERSION)) {
+ ioc->combined_reply_queue = 1;
+ if (ioc->is_gen35_ioc)
+ ioc->combined_reply_index_count =
+ MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT_G35;
+ else
+ ioc->combined_reply_index_count =
+ MPT3_SUP_REPLY_POST_HOST_INDEX_REG_COUNT_G3;
+ }
break;
default:
return -ENODEV;
@@ -9047,6 +9106,31 @@ scsih_pci_mmio_enabled(struct pci_dev *pdev)
return PCI_ERS_RESULT_RECOVERED;
}
+/**
+ * scsih__ncq_prio_supp - Check for NCQ command priority support
+ * @sdev: scsi device struct
+ *
+ * This is called when a user indicates they would like to enable
+ * ncq command priorities. This works only on SATA devices.
+ */
+bool scsih_ncq_prio_supp(struct scsi_device *sdev)
+{
+ unsigned char *buf;
+ bool ncq_prio_supp = false;
+
+ if (!scsi_device_supports_vpd(sdev))
+ return ncq_prio_supp;
+
+ buf = kmalloc(SCSI_VPD_PG_LEN, GFP_KERNEL);
+ if (!buf)
+ return ncq_prio_supp;
+
+ if (!scsi_get_vpd_page(sdev, 0x89, buf, SCSI_VPD_PG_LEN))
+ ncq_prio_supp = (buf[213] >> 4) & 1;
+
+ kfree(buf);
+ return ncq_prio_supp;
+}
/*
* The pci device ids are defined in mpi/mpi2_cnfg.h.
*/
@@ -9128,6 +9212,19 @@ static const struct pci_device_id mpt3sas_pci_table[] = {
PCI_ANY_ID, PCI_ANY_ID },
{ MPI2_MFGPAGE_VENDORID_LSI, MPI26_MFGPAGE_DEVID_SAS3324_4,
PCI_ANY_ID, PCI_ANY_ID },
+ /* Ventura, Crusader, Harpoon & Tomcat ~ 3516, 3416, 3508 & 3408*/
+ { MPI2_MFGPAGE_VENDORID_LSI, MPI26_MFGPAGE_DEVID_SAS3508,
+ PCI_ANY_ID, PCI_ANY_ID },
+ { MPI2_MFGPAGE_VENDORID_LSI, MPI26_MFGPAGE_DEVID_SAS3508_1,
+ PCI_ANY_ID, PCI_ANY_ID },
+ { MPI2_MFGPAGE_VENDORID_LSI, MPI26_MFGPAGE_DEVID_SAS3408,
+ PCI_ANY_ID, PCI_ANY_ID },
+ { MPI2_MFGPAGE_VENDORID_LSI, MPI26_MFGPAGE_DEVID_SAS3516,
+ PCI_ANY_ID, PCI_ANY_ID },
+ { MPI2_MFGPAGE_VENDORID_LSI, MPI26_MFGPAGE_DEVID_SAS3516_1,
+ PCI_ANY_ID, PCI_ANY_ID },
+ { MPI2_MFGPAGE_VENDORID_LSI, MPI26_MFGPAGE_DEVID_SAS3416,
+ PCI_ANY_ID, PCI_ANY_ID },
{0} /* Terminating entry */
};
MODULE_DEVICE_TABLE(pci, mpt3sas_pci_table);
@@ -9168,7 +9265,7 @@ scsih_init(void)
/* queuecommand callback hander */
scsi_io_cb_idx = mpt3sas_base_register_callback_handler(_scsih_io_done);
- /* task managment callback handler */
+ /* task management callback handler */
tm_cb_idx = mpt3sas_base_register_callback_handler(_scsih_tm_done);
/* base internal commands callback handler */