From 2b541f8f77fd339e4c5c5cbe8549b52445012704 Mon Sep 17 00:00:00 2001 From: Dave C Boutcher Date: Thu, 19 Jan 2006 13:34:44 -0600 Subject: [SCSI] ibmvscsi: handle re-enable firmware message New versions of the Power5 firmware can send a "re-enable" message to the virtual scsi adapter. This fix makes us handle the message correctly. Without it, the driver goes catatonic and the system crashes unpleasantly. Signed-off-by: Dave Boutcher Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvscsi.c | 67 +++++++++++++++++++---------------- drivers/scsi/ibmvscsi/ibmvscsi.h | 3 ++ drivers/scsi/ibmvscsi/iseries_vscsi.c | 13 +++++++ drivers/scsi/ibmvscsi/rpa_vscsi.c | 22 ++++++++++++ 4 files changed, 74 insertions(+), 31 deletions(-) (limited to 'drivers/scsi/ibmvscsi') diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index 822b9fa706f..eaefeddb2b4 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -87,7 +87,7 @@ static int max_channel = 3; static int init_timeout = 5; static int max_requests = 50; -#define IBMVSCSI_VERSION "1.5.7" +#define IBMVSCSI_VERSION "1.5.8" MODULE_DESCRIPTION("IBM Virtual SCSI"); MODULE_AUTHOR("Dave Boutcher"); @@ -534,7 +534,6 @@ static int map_data_for_srp_cmd(struct scsi_cmnd *cmd, static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, struct ibmvscsi_host_data *hostdata) { - struct scsi_cmnd *cmnd; u64 *crq_as_u64 = (u64 *) &evt_struct->crq; int rc; @@ -544,19 +543,8 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, * can handle more requests (can_queue) when we actually can't */ if ((evt_struct->crq.format == VIOSRP_SRP_FORMAT) && - (atomic_dec_if_positive(&hostdata->request_limit) < 0)) { - /* See if the adapter is disabled */ - if (atomic_read(&hostdata->request_limit) < 0) - goto send_error; - - printk(KERN_WARNING - "ibmvscsi: Warning, request_limit exceeded\n"); - unmap_cmd_data(&evt_struct->iu.srp.cmd, - evt_struct, - hostdata->dev); - free_event_struct(&hostdata->pool, evt_struct); - return SCSI_MLQUEUE_HOST_BUSY; - } + (atomic_dec_if_positive(&hostdata->request_limit) < 0)) + goto send_error; /* Copy the IU into the transfer area */ *evt_struct->xfer_iu = evt_struct->iu; @@ -572,7 +560,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, ibmvscsi_send_crq(hostdata, crq_as_u64[0], crq_as_u64[1])) != 0) { list_del(&evt_struct->list); - printk(KERN_ERR "ibmvscsi: failed to send event struct rc %d\n", + printk(KERN_ERR "ibmvscsi: send error %d\n", rc); goto send_error; } @@ -582,14 +570,8 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, send_error: unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, hostdata->dev); - if ((cmnd = evt_struct->cmnd) != NULL) { - cmnd->result = DID_ERROR << 16; - evt_struct->cmnd_done(cmnd); - } else if (evt_struct->done) - evt_struct->done(evt_struct); - free_event_struct(&hostdata->pool, evt_struct); - return 0; + return SCSI_MLQUEUE_HOST_BUSY; } /** @@ -802,7 +784,8 @@ static void login_rsp(struct srp_event_struct *evt_struct) case SRP_LOGIN_RSP_TYPE: /* it worked! */ break; case SRP_LOGIN_REJ_TYPE: /* refused! */ - printk(KERN_INFO "ibmvscsi: SRP_LOGIN_REQ rejected\n"); + printk(KERN_INFO "ibmvscsi: SRP_LOGIN_REJ reason %u\n", + evt_struct->xfer_iu->srp.login_rej.reason); /* Login failed. */ atomic_set(&hostdata->request_limit, -1); return; @@ -834,6 +817,9 @@ static void login_rsp(struct srp_event_struct *evt_struct) return; } + /* If we had any pending I/Os, kick them */ + scsi_unblock_requests(hostdata->host); + send_mad_adapter_info(hostdata); return; } @@ -862,6 +848,7 @@ static int send_srp_login(struct ibmvscsi_host_data *hostdata) init_timeout * HZ); login = &evt_struct->iu.srp.login_req; + memset(login, 0x00, sizeof(struct srp_login_req)); login->type = SRP_LOGIN_REQ_TYPE; login->max_requested_initiator_to_target_iulen = sizeof(union srp_iu); login->required_buffer_formats = 0x0006; @@ -1122,7 +1109,7 @@ static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd) * purge_requests: Our virtual adapter just shut down. purge any sent requests * @hostdata: the adapter */ -static void purge_requests(struct ibmvscsi_host_data *hostdata) +static void purge_requests(struct ibmvscsi_host_data *hostdata, int error_code) { struct srp_event_struct *tmp_evt, *pos; unsigned long flags; @@ -1131,7 +1118,7 @@ static void purge_requests(struct ibmvscsi_host_data *hostdata) list_for_each_entry_safe(tmp_evt, pos, &hostdata->sent, list) { list_del(&tmp_evt->list); if (tmp_evt->cmnd) { - tmp_evt->cmnd->result = (DID_ERROR << 16); + tmp_evt->cmnd->result = (error_code << 16); unmap_cmd_data(&tmp_evt->iu.srp.cmd, tmp_evt, tmp_evt->hostdata->dev); @@ -1186,12 +1173,30 @@ void ibmvscsi_handle_crq(struct viosrp_crq *crq, printk(KERN_ERR "ibmvscsi: unknown crq message type\n"); } return; - case 0xFF: /* Hypervisor telling us the connection is closed */ - printk(KERN_INFO "ibmvscsi: Virtual adapter failed!\n"); + case 0xFF: /* Hypervisor telling us the connection is closed */ + scsi_block_requests(hostdata->host); + if (crq->format == 0x06) { + /* We need to re-setup the interpartition connection */ + printk(KERN_INFO + "ibmvscsi: Re-enabling adapter!\n"); + purge_requests(hostdata, DID_REQUEUE); + if (ibmvscsi_reenable_crq_queue(&hostdata->queue, + hostdata) == 0) + if (ibmvscsi_send_crq(hostdata, + 0xC001000000000000LL, 0)) + printk(KERN_ERR + "ibmvscsi: transmit error after" + " enable\n"); + } else { + printk(KERN_INFO + "ibmvscsi: Virtual adapter failed rc %d!\n", + crq->format); - atomic_set(&hostdata->request_limit, -1); - purge_requests(hostdata); - ibmvscsi_reset_crq_queue(&hostdata->queue, hostdata); + atomic_set(&hostdata->request_limit, -1); + purge_requests(hostdata, DID_ERROR); + ibmvscsi_reset_crq_queue(&hostdata->queue, hostdata); + } + scsi_unblock_requests(hostdata->host); return; case 0x80: /* real payload */ break; diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.h b/drivers/scsi/ibmvscsi/ibmvscsi.h index 5b0edd1f192..4550d71e474 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.h +++ b/drivers/scsi/ibmvscsi/ibmvscsi.h @@ -103,6 +103,9 @@ void ibmvscsi_release_crq_queue(struct crq_queue *queue, int ibmvscsi_reset_crq_queue(struct crq_queue *queue, struct ibmvscsi_host_data *hostdata); +int ibmvscsi_reenable_crq_queue(struct crq_queue *queue, + struct ibmvscsi_host_data *hostdata); + void ibmvscsi_handle_crq(struct viosrp_crq *crq, struct ibmvscsi_host_data *hostdata); int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, diff --git a/drivers/scsi/ibmvscsi/iseries_vscsi.c b/drivers/scsi/ibmvscsi/iseries_vscsi.c index ce15d9e3962..7eed0b09817 100644 --- a/drivers/scsi/ibmvscsi/iseries_vscsi.c +++ b/drivers/scsi/ibmvscsi/iseries_vscsi.c @@ -123,6 +123,19 @@ int ibmvscsi_reset_crq_queue(struct crq_queue *queue, return 0; } +/** + * reenable_crq_queue: - reenables a crq after a failure + * @queue: crq_queue to initialize and register + * @hostdata: ibmvscsi_host_data of host + * + * no-op for iSeries + */ +int ibmvscsi_reenable_crq_queue(struct crq_queue *queue, + struct ibmvscsi_host_data *hostdata) +{ + return 0; +} + /** * ibmvscsi_send_crq: - Send a CRQ * @hostdata: the adapter diff --git a/drivers/scsi/ibmvscsi/rpa_vscsi.c b/drivers/scsi/ibmvscsi/rpa_vscsi.c index 75db2f5c545..f47dd87c05e 100644 --- a/drivers/scsi/ibmvscsi/rpa_vscsi.c +++ b/drivers/scsi/ibmvscsi/rpa_vscsi.c @@ -280,6 +280,28 @@ int ibmvscsi_init_crq_queue(struct crq_queue *queue, return -1; } +/** + * reenable_crq_queue: - reenables a crq after + * @queue: crq_queue to initialize and register + * @hostdata: ibmvscsi_host_data of host + * + */ +int ibmvscsi_reenable_crq_queue(struct crq_queue *queue, + struct ibmvscsi_host_data *hostdata) +{ + int rc; + struct vio_dev *vdev = to_vio_dev(hostdata->dev); + + /* Re-enable the CRQ */ + do { + rc = plpar_hcall_norets(H_ENABLE_CRQ, vdev->unit_address); + } while ((rc == H_InProgress) || (rc == H_Busy) || (H_isLongBusy(rc))); + + if (rc) + printk(KERN_ERR "ibmvscsi: Error %d enabling adapter\n", rc); + return rc; +} + /** * reset_crq_queue: - resets a crq after a failure * @queue: crq_queue to initialize and register -- cgit v1.2.3