diff options
Diffstat (limited to 'drivers/s390/scsi/zfcp_fsf.c')
-rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 80 |
1 files changed, 47 insertions, 33 deletions
diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index dc036769040..e6416f8541b 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -6,6 +6,9 @@ * Copyright IBM Corporation 2002, 2008 */ +#define KMSG_COMPONENT "zfcp" +#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt + #include <linux/blktrace_api.h> #include "zfcp_ext.h" @@ -641,38 +644,38 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) } } -static int zfcp_fsf_sbal_check(struct zfcp_adapter *adapter) +static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter) { - struct zfcp_qdio_queue *req_q = &adapter->req_q; - - spin_lock_bh(&adapter->req_q_lock); - if (atomic_read(&req_q->count)) + if (atomic_read(&adapter->req_q.count) > 0) return 1; - spin_unlock_bh(&adapter->req_q_lock); + atomic_inc(&adapter->qdio_outb_full); return 0; } -static int zfcp_fsf_sbal_available(struct zfcp_adapter *adapter) -{ - unsigned int count = atomic_read(&adapter->req_q.count); - if (!count) - atomic_inc(&adapter->qdio_outb_full); - return count > 0; -} - static int zfcp_fsf_req_sbal_get(struct zfcp_adapter *adapter) + __releases(&adapter->req_q_lock) + __acquires(&adapter->req_q_lock) { + struct zfcp_qdio_queue *req_q = &adapter->req_q; long ret; + if (atomic_read(&req_q->count) <= -REQUEST_LIST_SIZE) + return -EIO; + if (atomic_read(&req_q->count) > 0) + return 0; + + atomic_dec(&req_q->count); spin_unlock_bh(&adapter->req_q_lock); ret = wait_event_interruptible_timeout(adapter->request_wq, - zfcp_fsf_sbal_check(adapter), 5 * HZ); + atomic_read(&req_q->count) >= 0, + 5 * HZ); + spin_lock_bh(&adapter->req_q_lock); + atomic_inc(&req_q->count); + if (ret > 0) return 0; if (!ret) atomic_inc(&adapter->qdio_outb_full); - - spin_lock_bh(&adapter->req_q_lock); return -EIO; } @@ -1010,12 +1013,29 @@ skip_fsfstatus: send_ct->handler(send_ct->handler_data); } -static int zfcp_fsf_setup_sbals(struct zfcp_fsf_req *req, - struct scatterlist *sg_req, - struct scatterlist *sg_resp, int max_sbals) +static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, + struct scatterlist *sg_req, + struct scatterlist *sg_resp, + int max_sbals) { + struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(req); + u32 feat = req->adapter->adapter_features; int bytes; + if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) { + if (sg_req->length > PAGE_SIZE || sg_resp->length > PAGE_SIZE || + !sg_is_last(sg_req) || !sg_is_last(sg_resp)) + return -EOPNOTSUPP; + + sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE_READ; + sbale[2].addr = sg_virt(sg_req); + sbale[2].length = sg_req->length; + sbale[3].addr = sg_virt(sg_resp); + sbale[3].length = sg_resp->length; + sbale[3].flags |= SBAL_FLAGS_LAST_ENTRY; + return 0; + } + bytes = zfcp_qdio_sbals_from_sg(req, SBAL_FLAGS0_TYPE_WRITE_READ, sg_req, max_sbals); if (bytes <= 0) @@ -1057,8 +1077,8 @@ int zfcp_fsf_send_ct(struct zfcp_send_ct *ct, mempool_t *pool, goto out; } - ret = zfcp_fsf_setup_sbals(req, ct->req, ct->resp, - FSF_MAX_SBALS_PER_REQ); + ret = zfcp_fsf_setup_ct_els_sbals(req, ct->req, ct->resp, + FSF_MAX_SBALS_PER_REQ); if (ret) goto failed_send; @@ -1168,7 +1188,7 @@ int zfcp_fsf_send_els(struct zfcp_send_els *els) goto out; } - ret = zfcp_fsf_setup_sbals(req, els->req, els->resp, 2); + ret = zfcp_fsf_setup_ct_els_sbals(req, els->req, els->resp, 2); if (ret) goto failed_send; @@ -1403,13 +1423,7 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) switch (header->fsf_status_qual.word[0]) { case FSF_SQ_INVOKE_LINK_TEST_PROCEDURE: case FSF_SQ_ULP_DEPENDENT_ERP_REQUIRED: - req->status |= ZFCP_STATUS_FSFREQ_ERROR; - break; case FSF_SQ_NO_RETRY_POSSIBLE: - dev_warn(&req->adapter->ccw_device->dev, - "Remote port 0x%016Lx could not be opened\n", - (unsigned long long)port->wwpn); - zfcp_erp_port_failed(port, 32, req); req->status |= ZFCP_STATUS_FSFREQ_ERROR; break; } @@ -1437,10 +1451,10 @@ static void zfcp_fsf_open_port_handler(struct zfcp_fsf_req *req) * Alternately, an ADISC/PDISC ELS should suffice, as well. */ plogi = (struct fsf_plogi *) req->qtcb->bottom.support.els; - if (req->qtcb->bottom.support.els1_length >= sizeof(*plogi)) { + if (req->qtcb->bottom.support.els1_length >= + FSF_PLOGI_MIN_LEN) { if (plogi->serv_param.wwpn != port->wwpn) - atomic_clear_mask(ZFCP_STATUS_PORT_DID_DID, - &port->status); + port->d_id = 0; else { port->wwnn = plogi->serv_param.wwnn; zfcp_fc_plogi_evaluate(port, plogi); @@ -1904,7 +1918,7 @@ static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req) dev_err(&adapter->ccw_device->dev, "Shared read-write access not " "supported (unit 0x%016Lx, port " - "0x%016Lx\n)", + "0x%016Lx)\n", (unsigned long long)unit->fcp_lun, (unsigned long long)unit->port->wwpn); zfcp_erp_unit_failed(unit, 36, req); |