diff options
author | James Bottomley <James.Bottomley@suse.de> | 2010-05-18 14:33:43 (GMT) |
---|---|---|
committer | James Bottomley <James.Bottomley@suse.de> | 2010-05-18 14:37:41 (GMT) |
commit | 95bb335c0ebe96afe926387a1ef3a096bd884a82 (patch) | |
tree | 56115332b4f2f7ef300c36248a6a7d20db2e639d /drivers/s390 | |
parent | 1b4d0d8ea7b3cbd107f345ab766416f9b38ce66a (diff) | |
parent | 9cccde93fed1ca988eb2fb17ab9194bf7b5ed1b0 (diff) | |
download | linux-95bb335c0ebe96afe926387a1ef3a096bd884a82.tar.xz |
[SCSI] Merge scsi-misc-2.6 into scsi-rc-fixes-2.6
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/s390')
-rw-r--r-- | drivers/s390/scsi/zfcp_aux.c | 7 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_def.h | 19 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_erp.c | 2 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_ext.h | 6 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_fc.c | 4 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_fsf.c | 246 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_fsf.h | 11 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_qdio.c | 108 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_qdio.h | 104 | ||||
-rw-r--r-- | drivers/s390/scsi/zfcp_scsi.c | 23 |
10 files changed, 288 insertions, 242 deletions
diff --git a/drivers/s390/scsi/zfcp_aux.c b/drivers/s390/scsi/zfcp_aux.c index 1e6183a8..e331df2 100644 --- a/drivers/s390/scsi/zfcp_aux.c +++ b/drivers/s390/scsi/zfcp_aux.c @@ -425,7 +425,8 @@ int zfcp_status_read_refill(struct zfcp_adapter *adapter) { while (atomic_read(&adapter->stat_miss) > 0) if (zfcp_fsf_status_read(adapter->qdio)) { - if (atomic_read(&adapter->stat_miss) >= 16) { + if (atomic_read(&adapter->stat_miss) >= + adapter->stat_read_buf_num) { zfcp_erp_adapter_reopen(adapter, 0, "axsref1", NULL); return 1; @@ -545,6 +546,10 @@ struct zfcp_adapter *zfcp_adapter_enqueue(struct ccw_device *ccw_device) &zfcp_sysfs_adapter_attrs)) goto failed; + /* report size limit per scatter-gather segment */ + adapter->dma_parms.max_segment_size = ZFCP_QDIO_SBALE_LEN; + adapter->ccw_device->dev.dma_parms = &adapter->dma_parms; + if (!zfcp_adapter_scsi_register(adapter)) return adapter; diff --git a/drivers/s390/scsi/zfcp_def.h b/drivers/s390/scsi/zfcp_def.h index 7131c7d..9fa1b06 100644 --- a/drivers/s390/scsi/zfcp_def.h +++ b/drivers/s390/scsi/zfcp_def.h @@ -44,23 +44,6 @@ struct zfcp_reqlist; /********************* SCSI SPECIFIC DEFINES *********************************/ #define ZFCP_SCSI_ER_TIMEOUT (10*HZ) -/********************* CIO/QDIO SPECIFIC DEFINES *****************************/ - -/* DMQ bug workaround: don't use last SBALE */ -#define ZFCP_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) - -/* index of last SBALE (with respect to DMQ bug workaround) */ -#define ZFCP_LAST_SBALE_PER_SBAL (ZFCP_MAX_SBALES_PER_SBAL - 1) - -/* max. number of (data buffer) SBALEs in largest SBAL chain */ -#define ZFCP_MAX_SBALES_PER_REQ \ - (FSF_MAX_SBALS_PER_REQ * ZFCP_MAX_SBALES_PER_SBAL - 2) - /* request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ - -#define ZFCP_MAX_SECTORS (ZFCP_MAX_SBALES_PER_REQ * 8) - /* max. number of (data buffer) SBALEs in largest SBAL chain - multiplied with number of sectors per 4k block */ - /********************* FSF SPECIFIC DEFINES *********************************/ /* ATTENTION: value must not be used by hardware */ @@ -181,6 +164,7 @@ struct zfcp_adapter { stack abort/command completion races */ atomic_t stat_miss; /* # missing status reads*/ + unsigned int stat_read_buf_num; struct work_struct stat_work; atomic_t status; /* status of this adapter */ struct list_head erp_ready_head; /* error recovery for this @@ -205,6 +189,7 @@ struct zfcp_adapter { struct work_struct scan_work; struct service_level service_level; struct workqueue_struct *work_queue; + struct device_dma_parameters dma_parms; }; struct zfcp_port { diff --git a/drivers/s390/scsi/zfcp_erp.c b/drivers/s390/scsi/zfcp_erp.c index 0be5e7e..e3dbeda 100644 --- a/drivers/s390/scsi/zfcp_erp.c +++ b/drivers/s390/scsi/zfcp_erp.c @@ -714,7 +714,7 @@ static int zfcp_erp_adapter_strategy_open_fsf(struct zfcp_erp_action *act) if (zfcp_erp_adapter_strategy_open_fsf_xport(act) == ZFCP_ERP_FAILED) return ZFCP_ERP_FAILED; - atomic_set(&act->adapter->stat_miss, 16); + atomic_set(&act->adapter->stat_miss, act->adapter->stat_read_buf_num); if (zfcp_status_read_refill(act->adapter)) return ZFCP_ERP_FAILED; diff --git a/drivers/s390/scsi/zfcp_ext.h b/drivers/s390/scsi/zfcp_ext.h index 8786a79..48a8f93 100644 --- a/drivers/s390/scsi/zfcp_ext.h +++ b/drivers/s390/scsi/zfcp_ext.h @@ -3,7 +3,7 @@ * * External function declarations. * - * Copyright IBM Corporation 2002, 2009 + * Copyright IBM Corporation 2002, 2010 */ #ifndef ZFCP_EXT_H @@ -143,9 +143,9 @@ extern void zfcp_fsf_reqid_check(struct zfcp_qdio *, int); /* zfcp_qdio.c */ extern int zfcp_qdio_setup(struct zfcp_adapter *); extern void zfcp_qdio_destroy(struct zfcp_qdio *); +extern int zfcp_qdio_sbal_get(struct zfcp_qdio *); extern int zfcp_qdio_send(struct zfcp_qdio *, struct zfcp_qdio_req *); -extern int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *, - struct zfcp_qdio_req *, unsigned long, +extern int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *, struct zfcp_qdio_req *, struct scatterlist *, int); extern int zfcp_qdio_open(struct zfcp_qdio *); extern void zfcp_qdio_close(struct zfcp_qdio *); diff --git a/drivers/s390/scsi/zfcp_fc.c b/drivers/s390/scsi/zfcp_fc.c index 2a1cbb7..6f8ab43 100644 --- a/drivers/s390/scsi/zfcp_fc.c +++ b/drivers/s390/scsi/zfcp_fc.c @@ -400,7 +400,7 @@ static int zfcp_fc_adisc(struct zfcp_port *port) struct zfcp_adapter *adapter = port->adapter; int ret; - adisc = kmem_cache_alloc(zfcp_data.adisc_cache, GFP_ATOMIC); + adisc = kmem_cache_zalloc(zfcp_data.adisc_cache, GFP_ATOMIC); if (!adisc) return -ENOMEM; @@ -493,7 +493,7 @@ static struct zfcp_fc_gpn_ft *zfcp_alloc_sg_env(int buf_num) if (!gpn_ft) return NULL; - req = kmem_cache_alloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); + req = kmem_cache_zalloc(zfcp_data.gpn_ft_cache, GFP_KERNEL); if (!req) { kfree(gpn_ft); gpn_ft = NULL; diff --git a/drivers/s390/scsi/zfcp_fsf.c b/drivers/s390/scsi/zfcp_fsf.c index b3b1d2f..9ac6a6e 100644 --- a/drivers/s390/scsi/zfcp_fsf.c +++ b/drivers/s390/scsi/zfcp_fsf.c @@ -496,6 +496,7 @@ static int zfcp_fsf_exchange_config_evaluate(struct zfcp_fsf_req *req) adapter->hydra_version = bottom->adapter_type; adapter->timer_ticks = bottom->timer_interval; + adapter->stat_read_buf_num = max(bottom->status_read_buf_num, (u16)16); if (fc_host_permanent_port_name(shost) == -1) fc_host_permanent_port_name(shost) = fc_host_port_name(shost); @@ -640,37 +641,6 @@ static void zfcp_fsf_exchange_port_data_handler(struct zfcp_fsf_req *req) } } -static int zfcp_fsf_sbal_check(struct zfcp_qdio *qdio) -{ - struct zfcp_qdio_queue *req_q = &qdio->req_q; - - spin_lock_bh(&qdio->req_q_lock); - if (atomic_read(&req_q->count)) - return 1; - spin_unlock_bh(&qdio->req_q_lock); - return 0; -} - -static int zfcp_fsf_req_sbal_get(struct zfcp_qdio *qdio) -{ - struct zfcp_adapter *adapter = qdio->adapter; - long ret; - - spin_unlock_bh(&qdio->req_q_lock); - ret = wait_event_interruptible_timeout(qdio->req_q_wq, - zfcp_fsf_sbal_check(qdio), 5 * HZ); - if (ret > 0) - return 0; - if (!ret) { - atomic_inc(&qdio->req_q_full); - /* assume hanging outbound queue, try queue recovery */ - zfcp_erp_adapter_reopen(adapter, 0, "fsrsg_1", NULL); - } - - spin_lock_bh(&qdio->req_q_lock); - return -EIO; -} - static struct zfcp_fsf_req *zfcp_fsf_alloc(mempool_t *pool) { struct zfcp_fsf_req *req; @@ -705,10 +675,9 @@ static struct fsf_qtcb *zfcp_qtcb_alloc(mempool_t *pool) } static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio, - u32 fsf_cmd, mempool_t *pool) + u32 fsf_cmd, u32 sbtype, + mempool_t *pool) { - struct qdio_buffer_element *sbale; - struct zfcp_qdio_queue *req_q = &qdio->req_q; struct zfcp_adapter *adapter = qdio->adapter; struct zfcp_fsf_req *req = zfcp_fsf_alloc(pool); @@ -725,14 +694,6 @@ static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio, req->adapter = adapter; req->fsf_command = fsf_cmd; req->req_id = adapter->req_no; - req->qdio_req.sbal_number = 1; - req->qdio_req.sbal_first = req_q->first; - req->qdio_req.sbal_last = req_q->first; - req->qdio_req.sbale_curr = 1; - - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].addr = (void *) req->req_id; - sbale[0].flags |= SBAL_FLAGS0_COMMAND; if (likely(fsf_cmd != FSF_QTCB_UNSOLICITED_STATUS)) { if (likely(pool)) @@ -753,10 +714,11 @@ static struct zfcp_fsf_req *zfcp_fsf_req_create(struct zfcp_qdio *qdio, req->qtcb->prefix.qtcb_version = FSF_QTCB_CURRENT_VERSION; req->qtcb->header.req_handle = req->req_id; req->qtcb->header.fsf_command = req->fsf_command; - sbale[1].addr = (void *) req->qtcb; - sbale[1].length = sizeof(struct fsf_qtcb); } + zfcp_qdio_req_init(adapter->qdio, &req->qdio_req, req->req_id, sbtype, + req->qtcb, sizeof(struct fsf_qtcb)); + if (!(atomic_read(&adapter->status) & ZFCP_STATUS_ADAPTER_QDIOUP)) { zfcp_fsf_req_free(req); return ERR_PTR(-EIO); @@ -803,24 +765,19 @@ int zfcp_fsf_status_read(struct zfcp_qdio *qdio) struct zfcp_adapter *adapter = qdio->adapter; struct zfcp_fsf_req *req; struct fsf_status_read_buffer *sr_buf; - struct qdio_buffer_element *sbale; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; - req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, + req = zfcp_fsf_req_create(qdio, FSF_QTCB_UNSOLICITED_STATUS, 0, adapter->pool.status_read_req); if (IS_ERR(req)) { retval = PTR_ERR(req); goto out; } - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[2].flags |= SBAL_FLAGS_LAST_ENTRY; - req->qdio_req.sbale_curr = 2; - sr_buf = mempool_alloc(adapter->pool.status_read_data, GFP_ATOMIC); if (!sr_buf) { retval = -ENOMEM; @@ -828,9 +785,9 @@ int zfcp_fsf_status_read(struct zfcp_qdio *qdio) } memset(sr_buf, 0, sizeof(*sr_buf)); req->data = sr_buf; - sbale = zfcp_qdio_sbale_curr(qdio, &req->qdio_req); - sbale->addr = (void *) sr_buf; - sbale->length = sizeof(*sr_buf); + + zfcp_qdio_fill_next(qdio, &req->qdio_req, sr_buf, sizeof(*sr_buf)); + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); retval = zfcp_fsf_req_send(req); if (retval) @@ -907,14 +864,14 @@ static void zfcp_fsf_abort_fcp_command_handler(struct zfcp_fsf_req *req) struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, struct zfcp_unit *unit) { - struct qdio_buffer_element *sbale; struct zfcp_fsf_req *req = NULL; struct zfcp_qdio *qdio = unit->port->adapter->qdio; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_ABORT_FCP_CMND, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.scsi_abort); if (IS_ERR(req)) { req = NULL; @@ -925,9 +882,7 @@ struct zfcp_fsf_req *zfcp_fsf_abort_fcp_command(unsigned long old_req_id, ZFCP_STATUS_COMMON_UNBLOCKED))) goto out_error_free; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->data = unit; req->handler = zfcp_fsf_abort_fcp_command_handler; @@ -996,21 +951,14 @@ skip_fsfstatus: ct->handler(ct->handler_data); } -static void zfcp_fsf_setup_ct_els_unchained(struct qdio_buffer_element *sbale, +static void zfcp_fsf_setup_ct_els_unchained(struct zfcp_qdio *qdio, + struct zfcp_qdio_req *q_req, struct scatterlist *sg_req, struct scatterlist *sg_resp) { - 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; -} - -static int zfcp_fsf_one_sbal(struct scatterlist *sg) -{ - return sg_is_last(sg) && sg->length <= PAGE_SIZE; + zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_req), sg_req->length); + zfcp_qdio_fill_next(qdio, q_req, sg_virt(sg_resp), sg_resp->length); + zfcp_qdio_set_sbale_last(qdio, q_req); } static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, @@ -1019,35 +967,34 @@ static int zfcp_fsf_setup_ct_els_sbals(struct zfcp_fsf_req *req, int max_sbals) { struct zfcp_adapter *adapter = req->adapter; - struct qdio_buffer_element *sbale = zfcp_qdio_sbale_req(adapter->qdio, - &req->qdio_req); u32 feat = adapter->adapter_features; int bytes; if (!(feat & FSF_FEATURE_ELS_CT_CHAINED_SBALS)) { - if (!zfcp_fsf_one_sbal(sg_req) || !zfcp_fsf_one_sbal(sg_resp)) + if (!zfcp_qdio_sg_one_sbale(sg_req) || + !zfcp_qdio_sg_one_sbale(sg_resp)) return -EOPNOTSUPP; - zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp); + zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req, + sg_req, sg_resp); return 0; } /* use single, unchained SBAL if it can hold the request */ - if (zfcp_fsf_one_sbal(sg_req) && zfcp_fsf_one_sbal(sg_resp)) { - zfcp_fsf_setup_ct_els_unchained(sbale, sg_req, sg_resp); + if (zfcp_qdio_sg_one_sbale(sg_req) || zfcp_qdio_sg_one_sbale(sg_resp)) { + zfcp_fsf_setup_ct_els_unchained(adapter->qdio, &req->qdio_req, + sg_req, sg_resp); return 0; } bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, - SBAL_FLAGS0_TYPE_WRITE_READ, sg_req, max_sbals); if (bytes <= 0) return -EIO; req->qtcb->bottom.support.req_buf_length = bytes; - req->qdio_req.sbale_curr = ZFCP_LAST_SBALE_PER_SBAL; + zfcp_qdio_skip_to_last_sbale(&req->qdio_req); bytes = zfcp_qdio_sbals_from_sg(adapter->qdio, &req->qdio_req, - SBAL_FLAGS0_TYPE_WRITE_READ, sg_resp, max_sbals); req->qtcb->bottom.support.resp_buf_length = bytes; if (bytes <= 0) @@ -1091,10 +1038,11 @@ int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port, int ret = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; - req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, pool); + req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_GENERIC, + SBAL_FLAGS0_TYPE_WRITE_READ, pool); if (IS_ERR(req)) { ret = PTR_ERR(req); @@ -1103,7 +1051,7 @@ int zfcp_fsf_send_ct(struct zfcp_fc_wka_port *wka_port, req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; ret = zfcp_fsf_setup_ct_els(req, ct->req, ct->resp, - FSF_MAX_SBALS_PER_REQ, timeout); + ZFCP_FSF_MAX_SBALS_PER_REQ, timeout); if (ret) goto failed_send; @@ -1187,10 +1135,11 @@ int zfcp_fsf_send_els(struct zfcp_adapter *adapter, u32 d_id, int ret = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; - req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, NULL); + req = zfcp_fsf_req_create(qdio, FSF_QTCB_SEND_ELS, + SBAL_FLAGS0_TYPE_WRITE_READ, NULL); if (IS_ERR(req)) { ret = PTR_ERR(req); @@ -1224,16 +1173,16 @@ out: int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) { - struct qdio_buffer_element *sbale; struct zfcp_fsf_req *req; struct zfcp_qdio *qdio = erp_action->adapter->qdio; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (IS_ERR(req)) { @@ -1242,9 +1191,7 @@ int zfcp_fsf_exchange_config_data(struct zfcp_erp_action *erp_action) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->qtcb->bottom.config.feature_selection = FSF_FEATURE_CFDC | @@ -1269,24 +1216,22 @@ out: int zfcp_fsf_exchange_config_data_sync(struct zfcp_qdio *qdio, struct fsf_qtcb_bottom_config *data) { - struct qdio_buffer_element *sbale; struct zfcp_fsf_req *req = NULL; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out_unlock; - req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, NULL); + req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_CONFIG_DATA, + SBAL_FLAGS0_TYPE_READ, NULL); if (IS_ERR(req)) { retval = PTR_ERR(req); goto out_unlock; } - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->handler = zfcp_fsf_exchange_config_data_handler; req->qtcb->bottom.config.feature_selection = @@ -1320,7 +1265,6 @@ out_unlock: int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) { struct zfcp_qdio *qdio = erp_action->adapter->qdio; - struct qdio_buffer_element *sbale; struct zfcp_fsf_req *req; int retval = -EIO; @@ -1328,10 +1272,11 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) return -EOPNOTSUPP; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (IS_ERR(req)) { @@ -1340,9 +1285,7 @@ int zfcp_fsf_exchange_port_data(struct zfcp_erp_action *erp_action) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->handler = zfcp_fsf_exchange_port_data_handler; req->erp_action = erp_action; @@ -1368,7 +1311,6 @@ out: int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio, struct fsf_qtcb_bottom_port *data) { - struct qdio_buffer_element *sbale; struct zfcp_fsf_req *req = NULL; int retval = -EIO; @@ -1376,10 +1318,11 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio, return -EOPNOTSUPP; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out_unlock; - req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, NULL); + req = zfcp_fsf_req_create(qdio, FSF_QTCB_EXCHANGE_PORT_DATA, + SBAL_FLAGS0_TYPE_READ, NULL); if (IS_ERR(req)) { retval = PTR_ERR(req); @@ -1389,9 +1332,7 @@ int zfcp_fsf_exchange_port_data_sync(struct zfcp_qdio *qdio, if (data) req->data = data; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->handler = zfcp_fsf_exchange_port_data_handler; zfcp_fsf_start_timer(req, ZFCP_FSF_REQUEST_TIMEOUT); @@ -1485,17 +1426,17 @@ out: */ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) { - struct qdio_buffer_element *sbale; struct zfcp_qdio *qdio = erp_action->adapter->qdio; struct zfcp_port *port = erp_action->port; struct zfcp_fsf_req *req; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (IS_ERR(req)) { @@ -1504,9 +1445,7 @@ int zfcp_fsf_open_port(struct zfcp_erp_action *erp_action) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->handler = zfcp_fsf_open_port_handler; hton24(req->qtcb->bottom.support.d_id, port->d_id); @@ -1556,16 +1495,16 @@ static void zfcp_fsf_close_port_handler(struct zfcp_fsf_req *req) */ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) { - struct qdio_buffer_element *sbale; struct zfcp_qdio *qdio = erp_action->adapter->qdio; struct zfcp_fsf_req *req; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (IS_ERR(req)) { @@ -1574,9 +1513,7 @@ int zfcp_fsf_close_port(struct zfcp_erp_action *erp_action) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->handler = zfcp_fsf_close_port_handler; req->data = erp_action->port; @@ -1633,16 +1570,16 @@ out: */ int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port) { - struct qdio_buffer_element *sbale; struct zfcp_qdio *qdio = wka_port->adapter->qdio; struct zfcp_fsf_req *req; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_PORT_WITH_DID, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (unlikely(IS_ERR(req))) { @@ -1651,9 +1588,7 @@ int zfcp_fsf_open_wka_port(struct zfcp_fc_wka_port *wka_port) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->handler = zfcp_fsf_open_wka_port_handler; hton24(req->qtcb->bottom.support.d_id, wka_port->d_id); @@ -1688,16 +1623,16 @@ static void zfcp_fsf_close_wka_port_handler(struct zfcp_fsf_req *req) */ int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port) { - struct qdio_buffer_element *sbale; struct zfcp_qdio *qdio = wka_port->adapter->qdio; struct zfcp_fsf_req *req; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PORT, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (unlikely(IS_ERR(req))) { @@ -1706,9 +1641,7 @@ int zfcp_fsf_close_wka_port(struct zfcp_fc_wka_port *wka_port) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->handler = zfcp_fsf_close_wka_port_handler; req->data = wka_port; @@ -1782,16 +1715,16 @@ static void zfcp_fsf_close_physical_port_handler(struct zfcp_fsf_req *req) */ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) { - struct qdio_buffer_element *sbale; struct zfcp_qdio *qdio = erp_action->adapter->qdio; struct zfcp_fsf_req *req; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_PHYSICAL_PORT, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (IS_ERR(req)) { @@ -1800,9 +1733,7 @@ int zfcp_fsf_close_physical_port(struct zfcp_erp_action *erp_action) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->data = erp_action->port; req->qtcb->header.port_handle = erp_action->port->handle; @@ -1954,17 +1885,17 @@ static void zfcp_fsf_open_unit_handler(struct zfcp_fsf_req *req) */ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) { - struct qdio_buffer_element *sbale; struct zfcp_adapter *adapter = erp_action->adapter; struct zfcp_qdio *qdio = adapter->qdio; struct zfcp_fsf_req *req; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_OPEN_LUN, + SBAL_FLAGS0_TYPE_READ, adapter->pool.erp_req); if (IS_ERR(req)) { @@ -1973,9 +1904,7 @@ int zfcp_fsf_open_unit(struct zfcp_erp_action *erp_action) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->qtcb->header.port_handle = erp_action->port->handle; req->qtcb->bottom.support.fcp_lun = erp_action->unit->fcp_lun; @@ -2041,16 +1970,16 @@ static void zfcp_fsf_close_unit_handler(struct zfcp_fsf_req *req) */ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) { - struct qdio_buffer_element *sbale; struct zfcp_qdio *qdio = erp_action->adapter->qdio; struct zfcp_fsf_req *req; int retval = -EIO; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_CLOSE_LUN, + SBAL_FLAGS0_TYPE_READ, qdio->adapter->pool.erp_req); if (IS_ERR(req)) { @@ -2059,9 +1988,7 @@ int zfcp_fsf_close_unit(struct zfcp_erp_action *erp_action) } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_READ; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); req->qtcb->header.port_handle = erp_action->port->handle; req->qtcb->header.lun_handle = erp_action->unit->handle; @@ -2289,8 +2216,11 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit, goto out; } + if (scsi_cmnd->sc_data_direction == DMA_TO_DEVICE) + sbtype = SBAL_FLAGS0_TYPE_WRITE; + req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, - adapter->pool.scsi_req); + sbtype, adapter->pool.scsi_req); if (IS_ERR(req)) { retval = PTR_ERR(req); @@ -2298,7 +2228,6 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit, } req->status |= ZFCP_STATUS_FSFREQ_CLEANUP; - get_device(&unit->dev); req->unit = unit; req->data = scsi_cmnd; req->handler = zfcp_fsf_send_fcp_command_handler; @@ -2323,20 +2252,21 @@ int zfcp_fsf_send_fcp_command_task(struct zfcp_unit *unit, break; case DMA_TO_DEVICE: req->qtcb->bottom.io.data_direction = FSF_DATADIR_WRITE; - sbtype = SBAL_FLAGS0_TYPE_WRITE; break; case DMA_BIDIRECTIONAL: goto failed_scsi_cmnd; } + get_device(&unit->dev); + fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd; zfcp_fc_scsi_to_fcp(fcp_cmnd, scsi_cmnd); - real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, sbtype, + real_bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, scsi_sglist(scsi_cmnd), - FSF_MAX_SBALS_PER_REQ); + ZFCP_FSF_MAX_SBALS_PER_REQ); if (unlikely(real_bytes < 0)) { - if (req->qdio_req.sbal_number >= FSF_MAX_SBALS_PER_REQ) { + if (req->qdio_req.sbal_number >= ZFCP_FSF_MAX_SBALS_PER_REQ) { dev_err(&adapter->ccw_device->dev, "Oversize data package, unit 0x%016Lx " "on port 0x%016Lx closed\n", @@ -2371,7 +2301,6 @@ out: */ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags) { - struct qdio_buffer_element *sbale; struct zfcp_fsf_req *req = NULL; struct fcp_cmnd *fcp_cmnd; struct zfcp_qdio *qdio = unit->port->adapter->qdio; @@ -2381,10 +2310,11 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags) return NULL; spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; req = zfcp_fsf_req_create(qdio, FSF_QTCB_FCP_CMND, + SBAL_FLAGS0_TYPE_WRITE, qdio->adapter->pool.scsi_req); if (IS_ERR(req)) { @@ -2401,9 +2331,7 @@ struct zfcp_fsf_req *zfcp_fsf_send_fcp_ctm(struct zfcp_unit *unit, u8 tm_flags) req->qtcb->bottom.io.service_class = FSF_CLASS_3; req->qtcb->bottom.io.fcp_cmnd_length = FCP_CMND_LEN; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= SBAL_FLAGS0_TYPE_WRITE; - sbale[1].flags |= SBAL_FLAGS_LAST_ENTRY; + zfcp_qdio_set_sbale_last(qdio, &req->qdio_req); fcp_cmnd = (struct fcp_cmnd *) &req->qtcb->bottom.io.fcp_cmnd; zfcp_fc_fcp_tm(fcp_cmnd, unit->device, tm_flags); @@ -2432,7 +2360,6 @@ static void zfcp_fsf_control_file_handler(struct zfcp_fsf_req *req) struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, struct zfcp_fsf_cfdc *fsf_cfdc) { - struct qdio_buffer_element *sbale; struct zfcp_qdio *qdio = adapter->qdio; struct zfcp_fsf_req *req = NULL; struct fsf_qtcb_bottom_support *bottom; @@ -2453,10 +2380,10 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, } spin_lock_bh(&qdio->req_q_lock); - if (zfcp_fsf_req_sbal_get(qdio)) + if (zfcp_qdio_sbal_get(qdio)) goto out; - req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, NULL); + req = zfcp_fsf_req_create(qdio, fsf_cfdc->command, direction, NULL); if (IS_ERR(req)) { retval = -EPERM; goto out; @@ -2464,16 +2391,13 @@ struct zfcp_fsf_req *zfcp_fsf_control_file(struct zfcp_adapter *adapter, req->handler = zfcp_fsf_control_file_handler; - sbale = zfcp_qdio_sbale_req(qdio, &req->qdio_req); - sbale[0].flags |= direction; - bottom = &req->qtcb->bottom.support; bottom->operation_subtype = FSF_CFDC_OPERATION_SUBTYPE; bottom->option = fsf_cfdc->option; bytes = zfcp_qdio_sbals_from_sg(qdio, &req->qdio_req, - direction, fsf_cfdc->sg, - FSF_MAX_SBALS_PER_REQ); + fsf_cfdc->sg, + ZFCP_FSF_MAX_SBALS_PER_REQ); if (bytes != ZFCP_CFDC_MAX_SIZE) { zfcp_fsf_req_free(req); goto out; diff --git a/drivers/s390/scsi/zfcp_fsf.h b/drivers/s390/scsi/zfcp_fsf.h index b3de682..519083f 100644 --- a/drivers/s390/scsi/zfcp_fsf.h +++ b/drivers/s390/scsi/zfcp_fsf.h @@ -3,7 +3,7 @@ * * Interface to the FSF support functions. * - * Copyright IBM Corporation 2002, 2009 + * Copyright IBM Corporation 2002, 2010 */ #ifndef FSF_H @@ -152,7 +152,12 @@ #define FSF_CLASS_3 0x00000003 /* SBAL chaining */ -#define FSF_MAX_SBALS_PER_REQ 36 +#define ZFCP_FSF_MAX_SBALS_PER_REQ 36 + +/* max. number of (data buffer) SBALEs in largest SBAL chain + * request ID + QTCB in SBALE 0 + 1 of first SBAL in chain */ +#define ZFCP_FSF_MAX_SBALES_PER_REQ \ + (ZFCP_FSF_MAX_SBALS_PER_REQ * ZFCP_QDIO_MAX_SBALES_PER_SBAL - 2) /* logging space behind QTCB */ #define FSF_QTCB_LOG_SIZE 1024 @@ -361,7 +366,7 @@ struct fsf_qtcb_bottom_config { u32 adapter_type; u8 res0; u8 peer_d_id[3]; - u8 res1[2]; + u16 status_read_buf_num; u16 timer_interval; u8 res2[9]; u8 s_id[3]; diff --git a/drivers/s390/scsi/zfcp_qdio.c b/drivers/s390/scsi/zfcp_qdio.c index dbfa312..28117e1 100644 --- a/drivers/s390/scsi/zfcp_qdio.c +++ b/drivers/s390/scsi/zfcp_qdio.c @@ -3,7 +3,7 @@ * * Setup and helper functions to access QDIO. * - * Copyright IBM Corporation 2002, 2009 + * Copyright IBM Corporation 2002, 2010 */ #define KMSG_COMPONENT "zfcp" @@ -151,8 +151,7 @@ static void zfcp_qdio_sbal_limit(struct zfcp_qdio *qdio, } static struct qdio_buffer_element * -zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, - unsigned long sbtype) +zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req) { struct qdio_buffer_element *sbale; @@ -180,17 +179,16 @@ zfcp_qdio_sbal_chain(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, /* set storage-block type for new SBAL */ sbale = zfcp_qdio_sbale_curr(qdio, q_req); - sbale->flags |= sbtype; + sbale->flags |= q_req->sbtype; return sbale; } static struct qdio_buffer_element * -zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, - unsigned int sbtype) +zfcp_qdio_sbale_next(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req) { - if (q_req->sbale_curr == ZFCP_LAST_SBALE_PER_SBAL) - return zfcp_qdio_sbal_chain(qdio, q_req, sbtype); + if (q_req->sbale_curr == ZFCP_QDIO_LAST_SBALE_PER_SBAL) + return zfcp_qdio_sbal_chain(qdio, q_req); q_req->sbale_curr++; return zfcp_qdio_sbale_curr(qdio, q_req); } @@ -206,62 +204,38 @@ static void zfcp_qdio_undo_sbals(struct zfcp_qdio *qdio, zfcp_qdio_zero_sbals(sbal, first, count); } -static int zfcp_qdio_fill_sbals(struct zfcp_qdio *qdio, - struct zfcp_qdio_req *q_req, - unsigned int sbtype, void *start_addr, - unsigned int total_length) -{ - struct qdio_buffer_element *sbale; - unsigned long remaining, length; - void *addr; - - /* split segment up */ - for (addr = start_addr, remaining = total_length; remaining > 0; - addr += length, remaining -= length) { - sbale = zfcp_qdio_sbale_next(qdio, q_req, sbtype); - if (!sbale) { - atomic_inc(&qdio->req_q_full); - zfcp_qdio_undo_sbals(qdio, q_req); - return -EINVAL; - } - - /* new piece must not exceed next page boundary */ - length = min(remaining, - (PAGE_SIZE - ((unsigned long)addr & - (PAGE_SIZE - 1)))); - sbale->addr = addr; - sbale->length = length; - } - return 0; -} - /** * zfcp_qdio_sbals_from_sg - fill SBALs from scatter-gather list - * @fsf_req: request to be processed - * @sbtype: SBALE flags + * @qdio: pointer to struct zfcp_qdio + * @q_req: pointer to struct zfcp_qdio_req * @sg: scatter-gather list * @max_sbals: upper bound for number of SBALs to be used * Returns: number of bytes, or error (negativ) */ int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, - unsigned long sbtype, struct scatterlist *sg, - int max_sbals) + struct scatterlist *sg, int max_sbals) { struct qdio_buffer_element *sbale; - int retval, bytes = 0; + int bytes = 0; /* figure out last allowed SBAL */ zfcp_qdio_sbal_limit(qdio, q_req, max_sbals); /* set storage-block type for this request */ sbale = zfcp_qdio_sbale_req(qdio, q_req); - sbale->flags |= sbtype; + sbale->flags |= q_req->sbtype; for (; sg; sg = sg_next(sg)) { - retval = zfcp_qdio_fill_sbals(qdio, q_req, sbtype, - sg_virt(sg), sg->length); - if (retval < 0) - return retval; + sbale = zfcp_qdio_sbale_next(qdio, q_req); + if (!sbale) { + atomic_inc(&qdio->req_q_full); + zfcp_qdio_undo_sbals(qdio, q_req); + return -EINVAL; + } + + sbale->addr = sg_virt(sg); + sbale->length = sg->length; + bytes += sg->length; } @@ -272,6 +246,46 @@ int zfcp_qdio_sbals_from_sg(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, return bytes; } +static int zfcp_qdio_sbal_check(struct zfcp_qdio *qdio) +{ + struct zfcp_qdio_queue *req_q = &qdio->req_q; + + spin_lock_bh(&qdio->req_q_lock); + if (atomic_read(&req_q->count)) + return 1; + spin_unlock_bh(&qdio->req_q_lock); + return 0; +} + +/** + * zfcp_qdio_sbal_get - get free sbal in request queue, wait if necessary + * @qdio: pointer to struct zfcp_qdio + * + * The req_q_lock must be held by the caller of this function, and + * this function may only be called from process context; it will + * sleep when waiting for a free sbal. + * + * Returns: 0 on success, -EIO if there is no free sbal after waiting. + */ +int zfcp_qdio_sbal_get(struct zfcp_qdio *qdio) +{ + long ret; + + spin_unlock_bh(&qdio->req_q_lock); + ret = wait_event_interruptible_timeout(qdio->req_q_wq, + zfcp_qdio_sbal_check(qdio), 5 * HZ); + if (ret > 0) + return 0; + if (!ret) { + atomic_inc(&qdio->req_q_full); + /* assume hanging outbound queue, try queue recovery */ + zfcp_erp_adapter_reopen(qdio->adapter, 0, "qdsbg_1", NULL); + } + + spin_lock_bh(&qdio->req_q_lock); + return -EIO; +} + /** * zfcp_qdio_send - set PCI flag in first SBALE and send req to QDIO * @qdio: pointer to struct zfcp_qdio diff --git a/drivers/s390/scsi/zfcp_qdio.h b/drivers/s390/scsi/zfcp_qdio.h index 8cca546..138fba5 100644 --- a/drivers/s390/scsi/zfcp_qdio.h +++ b/drivers/s390/scsi/zfcp_qdio.h @@ -11,6 +11,14 @@ #include <asm/qdio.h> +#define ZFCP_QDIO_SBALE_LEN PAGE_SIZE + +/* DMQ bug workaround: don't use last SBALE */ +#define ZFCP_QDIO_MAX_SBALES_PER_SBAL (QDIO_MAX_ELEMENTS_PER_BUFFER - 1) + +/* index of last SBALE (with respect to DMQ bug workaround) */ +#define ZFCP_QDIO_LAST_SBALE_PER_SBAL (ZFCP_QDIO_MAX_SBALES_PER_SBAL - 1) + /** * struct zfcp_qdio_queue - qdio queue buffer, zfcp index and free count * @sbal: qdio buffers @@ -49,6 +57,7 @@ struct zfcp_qdio { /** * struct zfcp_qdio_req - qdio queue related values for a request + * @sbtype: sbal type flags for sbale 0 * @sbal_number: number of free sbals * @sbal_first: first sbal for this request * @sbal_last: last sbal for this request @@ -59,6 +68,7 @@ struct zfcp_qdio { * @qdio_inb_usage: usage of inbound queue */ struct zfcp_qdio_req { + u32 sbtype; u8 sbal_number; u8 sbal_first; u8 sbal_last; @@ -106,4 +116,98 @@ zfcp_qdio_sbale_curr(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req) q_req->sbale_curr); } +/** + * zfcp_qdio_req_init - initialize qdio request + * @qdio: request queue where to start putting the request + * @q_req: the qdio request to start + * @req_id: The request id + * @sbtype: type flags to set for all sbals + * @data: First data block + * @len: Length of first data block + * + * This is the start of putting the request into the queue, the last + * step is passing the request to zfcp_qdio_send. The request queue + * lock must be held during the whole process from init to send. + */ +static inline +void zfcp_qdio_req_init(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, + unsigned long req_id, u32 sbtype, void *data, u32 len) +{ + struct qdio_buffer_element *sbale; + + q_req->sbal_first = q_req->sbal_last = qdio->req_q.first; + q_req->sbal_number = 1; + q_req->sbtype = sbtype; + + sbale = zfcp_qdio_sbale_req(qdio, q_req); + sbale->addr = (void *) req_id; + sbale->flags |= SBAL_FLAGS0_COMMAND; + sbale->flags |= sbtype; + + q_req->sbale_curr = 1; + sbale++; + sbale->addr = data; + if (likely(data)) + sbale->length = len; +} + +/** + * zfcp_qdio_fill_next - Fill next sbale, only for single sbal requests + * @qdio: pointer to struct zfcp_qdio + * @q_req: pointer to struct zfcp_queue_req + * + * This is only required for single sbal requests, calling it when + * wrapping around to the next sbal is a bug. + */ +static inline +void zfcp_qdio_fill_next(struct zfcp_qdio *qdio, struct zfcp_qdio_req *q_req, + void *data, u32 len) +{ + struct qdio_buffer_element *sbale; + + BUG_ON(q_req->sbale_curr == ZFCP_QDIO_LAST_SBALE_PER_SBAL); + q_req->sbale_curr++; + sbale = zfcp_qdio_sbale_curr(qdio, q_req); + sbale->addr = data; + sbale->length = len; +} + +/** + * zfcp_qdio_set_sbale_last - set last entry flag in current sbale + * @qdio: pointer to struct zfcp_qdio + * @q_req: pointer to struct zfcp_queue_req + */ +static inline +void zfcp_qdio_set_sbale_last(struct zfcp_qdio *qdio, + struct zfcp_qdio_req *q_req) +{ + struct qdio_buffer_element *sbale; + + sbale = zfcp_qdio_sbale_curr(qdio, q_req); + sbale->flags |= SBAL_FLAGS_LAST_ENTRY; +} + +/** + * zfcp_qdio_sg_one_sbal - check if one sbale is enough for sg data + * @sg: The scatterlist where to check the data size + * + * Returns: 1 when one sbale is enough for the data in the scatterlist, + * 0 if not. + */ +static inline +int zfcp_qdio_sg_one_sbale(struct scatterlist *sg) +{ + return sg_is_last(sg) && sg->length <= ZFCP_QDIO_SBALE_LEN; +} + +/** + * zfcp_qdio_skip_to_last_sbale - skip to last sbale in sbal + * @q_req: The current zfcp_qdio_req + */ +static inline +void zfcp_qdio_skip_to_last_sbale(struct zfcp_qdio_req *q_req) +{ + q_req->sbale_curr = ZFCP_QDIO_LAST_SBALE_PER_SBAL; +} + #endif /* ZFCP_QDIO_H */ diff --git a/drivers/s390/scsi/zfcp_scsi.c b/drivers/s390/scsi/zfcp_scsi.c index 174b6d5..be5d2c6 100644 --- a/drivers/s390/scsi/zfcp_scsi.c +++ b/drivers/s390/scsi/zfcp_scsi.c @@ -175,7 +175,7 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) struct zfcp_fsf_req *old_req, *abrt_req; unsigned long flags; unsigned long old_reqid = (unsigned long) scpnt->host_scribble; - int retval = SUCCESS; + int retval = SUCCESS, ret; int retry = 3; char *dbf_tag; @@ -200,7 +200,9 @@ static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt) break; zfcp_erp_wait(adapter); - fc_block_scsi_eh(scpnt); + ret = fc_block_scsi_eh(scpnt); + if (ret) + return ret; if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_RUNNING)) { zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL, @@ -231,7 +233,7 @@ static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) struct zfcp_unit *unit = scpnt->device->hostdata; struct zfcp_adapter *adapter = unit->port->adapter; struct zfcp_fsf_req *fsf_req = NULL; - int retval = SUCCESS; + int retval = SUCCESS, ret; int retry = 3; while (retry--) { @@ -240,7 +242,10 @@ static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags) break; zfcp_erp_wait(adapter); - fc_block_scsi_eh(scpnt); + ret = fc_block_scsi_eh(scpnt); + if (ret) + return ret; + if (!(atomic_read(&adapter->status) & ZFCP_STATUS_COMMON_RUNNING)) { zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt); @@ -276,10 +281,13 @@ static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt) { struct zfcp_unit *unit = scpnt->device->hostdata; struct zfcp_adapter *adapter = unit->port->adapter; + int ret; zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt); zfcp_erp_wait(adapter); - fc_block_scsi_eh(scpnt); + ret = fc_block_scsi_eh(scpnt); + if (ret) + return ret; return SUCCESS; } @@ -669,11 +677,12 @@ struct zfcp_data zfcp_data = { .eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler, .can_queue = 4096, .this_id = -1, - .sg_tablesize = ZFCP_MAX_SBALES_PER_REQ, + .sg_tablesize = ZFCP_FSF_MAX_SBALES_PER_REQ, .cmd_per_lun = 1, .use_clustering = 1, .sdev_attrs = zfcp_sysfs_sdev_attrs, - .max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8), + .max_sectors = (ZFCP_FSF_MAX_SBALES_PER_REQ * 8), + .dma_boundary = ZFCP_QDIO_SBALE_LEN - 1, .shost_attrs = zfcp_sysfs_shost_attrs, }, }; |