diff options
Diffstat (limited to 'drivers/scsi/ibmvscsi/ibmvscsi.c')
| -rw-r--r-- | drivers/scsi/ibmvscsi/ibmvscsi.c | 605 |
1 files changed, 313 insertions, 292 deletions
diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index d0fa4b6c551f..3d65a498b701 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-or-later /* ------------------------------------------------------------ * ibmvscsi.c * (C) Copyright IBM Corporation 1994, 2004 @@ -5,21 +6,6 @@ * Santiago Leon (santil@us.ibm.com) * Dave Boutcher (sleddog@us.ibm.com) * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 - * USA - * * ------------------------------------------------------------ * Emulation of a SCSI host adapter for Virtual I/O devices * @@ -93,8 +79,10 @@ static int max_requests = IBMVSCSI_MAX_REQUESTS_DEFAULT; static int max_events = IBMVSCSI_MAX_REQUESTS_DEFAULT + 2; static int fast_fail = 1; static int client_reserve = 1; -static char partition_name[97] = "UNKNOWN"; +static char partition_name[96] = "UNKNOWN"; static unsigned int partition_number = -1; +static LIST_HEAD(ibmvscsi_head); +static DEFINE_SPINLOCK(ibmvscsi_driver_lock); static struct scsi_transport_template *ibmvscsi_transport_template; @@ -106,9 +94,9 @@ MODULE_LICENSE("GPL"); MODULE_VERSION(IBMVSCSI_VERSION); module_param_named(max_id, max_id, int, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(max_id, "Largest ID value for each channel"); +MODULE_PARM_DESC(max_id, "Largest ID value for each channel [Default=64]"); module_param_named(max_channel, max_channel, int, S_IRUGO | S_IWUSR); -MODULE_PARM_DESC(max_channel, "Largest channel value"); +MODULE_PARM_DESC(max_channel, "Largest channel value [Default=3]"); module_param_named(init_timeout, init_timeout, int, S_IRUGO | S_IWUSR); MODULE_PARM_DESC(init_timeout, "Initialization timeout in seconds"); module_param_named(max_requests, max_requests, int, S_IRUGO); @@ -142,9 +130,10 @@ static irqreturn_t ibmvscsi_handle_event(int irq, void *dev_instance) } /** - * release_crq_queue: - Deallocates data and unregisters CRQ - * @queue: crq_queue to initialize and register - * @host_data: ibmvscsi_host_data of host + * ibmvscsi_release_crq_queue() - Deallocates data and unregisters CRQ + * @queue: crq_queue to initialize and register + * @hostdata: ibmvscsi_host_data of host + * @max_requests: maximum requests (unused) * * Frees irq, deallocates a page for messages, unmaps dma, and unregisters * the crq with the hypervisor. @@ -182,9 +171,14 @@ static struct viosrp_crq *crq_queue_next_crq(struct crq_queue *queue) spin_lock_irqsave(&queue->lock, flags); crq = &queue->msgs[queue->cur]; - if (crq->valid & 0x80) { + if (crq->valid != VIOSRP_CRQ_FREE) { if (++queue->cur == queue->size) queue->cur = 0; + + /* Ensure the read of the valid bit occurs before reading any + * other bits of the CRQ entry + */ + rmb(); } else crq = NULL; spin_unlock_irqrestore(&queue->lock, flags); @@ -203,6 +197,11 @@ static int ibmvscsi_send_crq(struct ibmvscsi_host_data *hostdata, { struct vio_dev *vdev = to_vio_dev(hostdata->dev); + /* + * Ensure the command buffer is flushed to memory before handing it + * over to the VIOS to prevent it from fetching any stale data. + */ + mb(); return plpar_hcall_norets(H_SEND_CRQ, vdev->unit_address, word1, word2); } @@ -221,7 +220,8 @@ static void ibmvscsi_task(void *data) /* Pull all the valid messages off the CRQ */ while ((crq = crq_queue_next_crq(&hostdata->queue)) != NULL) { ibmvscsi_handle_crq(crq, hostdata); - crq->valid = 0x00; + crq->valid = VIOSRP_CRQ_FREE; + wmb(); } vio_enable_interrupts(vdev); @@ -229,7 +229,8 @@ static void ibmvscsi_task(void *data) if (crq != NULL) { vio_disable_interrupts(vdev); ibmvscsi_handle_crq(crq, hostdata); - crq->valid = 0x00; + crq->valid = VIOSRP_CRQ_FREE; + wmb(); } else { done = 1; } @@ -238,25 +239,23 @@ static void ibmvscsi_task(void *data) static void gather_partition_info(void) { - struct device_node *rootdn; - const char *ppartition_name; - const unsigned int *p_number_ptr; + const __be32 *p_number_ptr; /* Retrieve information about this partition */ - rootdn = of_find_node_by_path("/"); - if (!rootdn) { + if (!of_root) return; - } - ppartition_name = of_get_property(rootdn, "ibm,partition-name", NULL); + of_node_get(of_root); + + ppartition_name = of_get_property(of_root, "ibm,partition-name", NULL); if (ppartition_name) - strncpy(partition_name, ppartition_name, + strscpy(partition_name, ppartition_name, sizeof(partition_name)); - p_number_ptr = of_get_property(rootdn, "ibm,partition-no", NULL); + p_number_ptr = of_get_property(of_root, "ibm,partition-no", NULL); if (p_number_ptr) - partition_number = *p_number_ptr; - of_node_put(rootdn); + partition_number = of_read_number(p_number_ptr, 1); + of_node_put(of_root); } static void set_adapter_info(struct ibmvscsi_host_data *hostdata) @@ -267,20 +266,20 @@ static void set_adapter_info(struct ibmvscsi_host_data *hostdata) dev_info(hostdata->dev, "SRP_VERSION: %s\n", SRP_VERSION); strcpy(hostdata->madapter_info.srp_version, SRP_VERSION); - strncpy(hostdata->madapter_info.partition_name, partition_name, + strscpy(hostdata->madapter_info.partition_name, partition_name, sizeof(hostdata->madapter_info.partition_name)); - hostdata->madapter_info.partition_number = partition_number; + hostdata->madapter_info.partition_number = + cpu_to_be32(partition_number); - hostdata->madapter_info.mad_version = 1; - hostdata->madapter_info.os_type = 2; + hostdata->madapter_info.mad_version = cpu_to_be32(SRP_MAD_VERSION_1); + hostdata->madapter_info.os_type = cpu_to_be32(SRP_MAD_OS_LINUX); } /** - * reset_crq_queue: - resets a crq after a failure + * ibmvscsi_reset_crq_queue() - resets a crq after a failure * @queue: crq_queue to initialize and register * @hostdata: ibmvscsi_host_data of host - * */ static int ibmvscsi_reset_crq_queue(struct crq_queue *queue, struct ibmvscsi_host_data *hostdata) @@ -305,7 +304,7 @@ static int ibmvscsi_reset_crq_queue(struct crq_queue *queue, rc = plpar_hcall_norets(H_REG_CRQ, vdev->unit_address, queue->msg_token, PAGE_SIZE); - if (rc == 2) { + if (rc == H_CLOSED) { /* Adapter is good, but other end is not ready */ dev_warn(hostdata->dev, "Partner adapter not ready\n"); } else if (rc != 0) { @@ -315,9 +314,10 @@ static int ibmvscsi_reset_crq_queue(struct crq_queue *queue, } /** - * initialize_crq_queue: - Initializes and registers CRQ with hypervisor - * @queue: crq_queue to initialize and register - * @hostdata: ibmvscsi_host_data of host + * ibmvscsi_init_crq_queue() - Initializes and registers CRQ with hypervisor + * @queue: crq_queue to initialize and register + * @hostdata: ibmvscsi_host_data of host + * @max_requests: maximum requests (unused) * * Allocates a page for messages, maps it for dma, and registers * the crq with the hypervisor. @@ -355,7 +355,7 @@ static int ibmvscsi_init_crq_queue(struct crq_queue *queue, rc = ibmvscsi_reset_crq_queue(queue, hostdata); - if (rc == 2) { + if (rc == H_CLOSED) { /* Adapter is good, but other end is not ready */ dev_warn(hostdata->dev, "Partner adapter not ready\n"); retrc = 0; @@ -405,10 +405,9 @@ static int ibmvscsi_init_crq_queue(struct crq_queue *queue, } /** - * reenable_crq_queue: - reenables a crq after + * ibmvscsi_reenable_crq_queue() - reenables a crq after * @queue: crq_queue to initialize and register * @hostdata: ibmvscsi_host_data of host - * */ static int ibmvscsi_reenable_crq_queue(struct crq_queue *queue, struct ibmvscsi_host_data *hostdata) @@ -416,6 +415,8 @@ static int ibmvscsi_reenable_crq_queue(struct crq_queue *queue, int rc = 0; struct vio_dev *vdev = to_vio_dev(hostdata->dev); + set_adapter_info(hostdata); + /* Re-enable the CRQ */ do { if (rc) @@ -438,7 +439,7 @@ static int ibmvscsi_reenable_crq_queue(struct crq_queue *queue, * @hostdata: ibmvscsi_host_data who owns the event pool * * Returns zero on success. -*/ + */ static int initialize_event_pool(struct event_pool *pool, int size, struct ibmvscsi_host_data *hostdata) { @@ -453,7 +454,7 @@ static int initialize_event_pool(struct event_pool *pool, pool->iu_storage = dma_alloc_coherent(hostdata->dev, pool->size * sizeof(*pool->iu_storage), - &pool->iu_token, 0); + &pool->iu_token, GFP_KERNEL); if (!pool->iu_storage) { kfree(pool->events); return -ENOMEM; @@ -463,10 +464,10 @@ static int initialize_event_pool(struct event_pool *pool, struct srp_event_struct *evt = &pool->events[i]; memset(&evt->crq, 0x00, sizeof(evt->crq)); atomic_set(&evt->free, 1); - evt->crq.valid = 0x80; - evt->crq.IU_length = sizeof(*evt->xfer_iu); - evt->crq.IU_data_ptr = pool->iu_token + - sizeof(*evt->xfer_iu) * i; + evt->crq.valid = VIOSRP_CRQ_CMD_RSP; + evt->crq.IU_length = cpu_to_be16(sizeof(*evt->xfer_iu)); + evt->crq.IU_data_ptr = cpu_to_be64(pool->iu_token + + sizeof(*evt->xfer_iu) * i); evt->xfer_iu = pool->iu_storage + i; evt->hostdata = hostdata; evt->ext_list = NULL; @@ -477,12 +478,12 @@ static int initialize_event_pool(struct event_pool *pool, } /** - * release_event_pool: - Frees memory of an event pool of a host + * release_event_pool() - Frees memory of an event pool of a host * @pool: event_pool to be released * @hostdata: ibmvscsi_host_data who owns the even pool * * Returns zero on success. -*/ + */ static void release_event_pool(struct event_pool *pool, struct ibmvscsi_host_data *hostdata) { @@ -525,11 +526,10 @@ static int valid_event_struct(struct event_pool *pool, } /** - * ibmvscsi_free-event_struct: - Changes status of event to "free" + * free_event_struct() - Changes status of event to "free" * @pool: event_pool that contains the event * @evt: srp_event_struct to be modified - * -*/ + */ static void free_event_struct(struct event_pool *pool, struct srp_event_struct *evt) { @@ -546,7 +546,7 @@ static void free_event_struct(struct event_pool *pool, } /** - * get_evt_struct: - Gets the next free event in pool + * get_event_struct() - Gets the next free event in pool * @pool: event_pool that contains the events to be searched * * Returns the next event in "free" state, and NULL if none are free. @@ -574,7 +574,7 @@ static struct srp_event_struct *get_event_struct(struct event_pool *pool) /** * init_event_struct: Initialize fields in an event struct that are always * required. - * @evt: The event + * @evt_struct: The event * @done: Routine to call when the event is responded to * @format: SRP or MAD format * @timeout: timeout value set in the CRQ @@ -588,7 +588,7 @@ static void init_event_struct(struct srp_event_struct *evt_struct, evt_struct->cmnd_done = NULL; evt_struct->sync_srp = NULL; evt_struct->crq.format = format; - evt_struct->crq.timeout = timeout; + evt_struct->crq.timeout = cpu_to_be16(timeout); evt_struct->done = done; } @@ -596,7 +596,7 @@ static void init_event_struct(struct srp_event_struct *evt_struct, * Routines for receiving SCSI responses from the hosting partition */ -/** +/* * set_srp_direction: Set the fields in the srp related to data * direction and number of buffers based on the direction in * the scsi_cmnd and the number of buffers @@ -631,9 +631,9 @@ static void set_srp_direction(struct scsi_cmnd *cmd, /** * unmap_cmd_data: - Unmap data pointed in srp_cmd based on the format * @cmd: srp_cmd whose additional_data member will be unmapped + * @evt_struct: the event * @dev: device for which the memory is mapped - * -*/ + */ static void unmap_cmd_data(struct srp_cmd *cmd, struct srp_event_struct *evt_struct, struct device *dev) @@ -659,8 +659,8 @@ static int map_sg_list(struct scsi_cmnd *cmd, int nseg, scsi_for_each_sg(cmd, sg, nseg, i) { struct srp_direct_buf *descr = md + i; - descr->va = sg_dma_address(sg); - descr->len = sg_dma_len(sg); + descr->va = cpu_to_be64(sg_dma_address(sg)); + descr->len = cpu_to_be32(sg_dma_len(sg)); descr->key = 0; total_length += sg_dma_len(sg); } @@ -668,8 +668,9 @@ static int map_sg_list(struct scsi_cmnd *cmd, int nseg, } /** - * map_sg_data: - Maps dma for a scatterlist and initializes decriptor fields - * @cmd: Scsi_Cmnd with the scatterlist + * map_sg_data: - Maps dma for a scatterlist and initializes descriptor fields + * @cmd: struct scsi_cmnd with the scatterlist + * @evt_struct: struct srp_event_struct to map * @srp_cmd: srp_cmd that contains the memory descriptor * @dev: device for which to map dma memory * @@ -703,20 +704,20 @@ static int map_sg_data(struct scsi_cmnd *cmd, } indirect->table_desc.va = 0; - indirect->table_desc.len = sg_mapped * sizeof(struct srp_direct_buf); + indirect->table_desc.len = cpu_to_be32(sg_mapped * + sizeof(struct srp_direct_buf)); indirect->table_desc.key = 0; if (sg_mapped <= MAX_INDIRECT_BUFS) { total_length = map_sg_list(cmd, sg_mapped, &indirect->desc_list[0]); - indirect->len = total_length; + indirect->len = cpu_to_be32(total_length); return 1; } /* get indirect table */ if (!evt_struct->ext_list) { - evt_struct->ext_list = (struct srp_direct_buf *) - dma_alloc_coherent(dev, + evt_struct->ext_list = dma_alloc_coherent(dev, SG_ALL * sizeof(struct srp_direct_buf), &evt_struct->ext_list_token, 0); if (!evt_struct->ext_list) { @@ -731,9 +732,10 @@ static int map_sg_data(struct scsi_cmnd *cmd, total_length = map_sg_list(cmd, sg_mapped, evt_struct->ext_list); - indirect->len = total_length; - indirect->table_desc.va = evt_struct->ext_list_token; - indirect->table_desc.len = sg_mapped * sizeof(indirect->desc_list[0]); + indirect->len = cpu_to_be32(total_length); + indirect->table_desc.va = cpu_to_be64(evt_struct->ext_list_token); + indirect->table_desc.len = cpu_to_be32(sg_mapped * + sizeof(indirect->desc_list[0])); memcpy(indirect->desc_list, evt_struct->ext_list, MAX_INDIRECT_BUFS * sizeof(struct srp_direct_buf)); return 1; @@ -742,6 +744,7 @@ static int map_sg_data(struct scsi_cmnd *cmd, /** * map_data_for_srp_cmd: - Calls functions to map data for srp cmds * @cmd: struct scsi_cmnd with the memory to be mapped + * @evt_struct: struct srp_event_struct to map * @srp_cmd: srp_cmd that contains the memory descriptor * @dev: dma device for which to map dma memory * @@ -775,6 +778,7 @@ static int map_data_for_srp_cmd(struct scsi_cmnd *cmd, /** * purge_requests: Our virtual adapter just shut down. purge any sent requests * @hostdata: the adapter + * @error_code: error code to return as the 'result' */ static void purge_requests(struct ibmvscsi_host_data *hostdata, int error_code) { @@ -785,7 +789,7 @@ static void purge_requests(struct ibmvscsi_host_data *hostdata, int error_code) while (!list_empty(&hostdata->sent)) { evt = list_first_entry(&hostdata->sent, struct srp_event_struct, list); list_del(&evt->list); - del_timer(&evt->timer); + timer_delete(&evt->timer); spin_unlock_irqrestore(hostdata->host->host_lock, flags); if (evt->cmnd) { @@ -794,7 +798,8 @@ static void purge_requests(struct ibmvscsi_host_data *hostdata, int error_code) evt->hostdata->dev); if (evt->cmnd_done) evt->cmnd_done(evt->cmnd); - } else if (evt->done) + } else if (evt->done && evt->crq.format != VIOSRP_MAD_FORMAT && + evt->iu.srp.login_req.opcode != SRP_LOGIN_REQ) evt->done(evt); free_event_struct(&evt->hostdata->pool, evt); spin_lock_irqsave(hostdata->host->host_lock, flags); @@ -803,27 +808,45 @@ static void purge_requests(struct ibmvscsi_host_data *hostdata, int error_code) } /** + * ibmvscsi_set_request_limit - Set the adapter request_limit in response to + * an adapter failure, reset, or SRP Login. Done under host lock to prevent + * race with SCSI command submission. + * @hostdata: adapter to adjust + * @limit: new request limit + */ +static void ibmvscsi_set_request_limit(struct ibmvscsi_host_data *hostdata, int limit) +{ + unsigned long flags; + + spin_lock_irqsave(hostdata->host->host_lock, flags); + atomic_set(&hostdata->request_limit, limit); + spin_unlock_irqrestore(hostdata->host->host_lock, flags); +} + +/** * ibmvscsi_reset_host - Reset the connection to the server * @hostdata: struct ibmvscsi_host_data to reset */ static void ibmvscsi_reset_host(struct ibmvscsi_host_data *hostdata) { scsi_block_requests(hostdata->host); - atomic_set(&hostdata->request_limit, 0); + ibmvscsi_set_request_limit(hostdata, 0); purge_requests(hostdata, DID_ERROR); - hostdata->reset_crq = 1; + hostdata->action = IBMVSCSI_HOST_ACTION_RESET; wake_up(&hostdata->work_wait_q); } /** * ibmvscsi_timeout - Internal command timeout handler - * @evt_struct: struct srp_event_struct that timed out + * @t: struct srp_event_struct that timed out * * Called when an internally generated command times out */ -static void ibmvscsi_timeout(struct srp_event_struct *evt_struct) +static void ibmvscsi_timeout(struct timer_list *t) { + struct srp_event_struct *evt_struct = timer_container_of(evt_struct, + t, timer); struct ibmvscsi_host_data *hostdata = evt_struct->hostdata; dev_err(hostdata->dev, "Command timed out (%x). Resetting connection\n", @@ -849,7 +872,7 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, struct ibmvscsi_host_data *hostdata, unsigned long timeout) { - u64 *crq_as_u64 = (u64 *) &evt_struct->crq; + __be64 *crq_as_u64 = (__be64 *)&evt_struct->crq; int request_status = 0; int rc; int srp_req = 0; @@ -912,18 +935,17 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, */ list_add_tail(&evt_struct->list, &hostdata->sent); - init_timer(&evt_struct->timer); + timer_setup(&evt_struct->timer, ibmvscsi_timeout, 0); if (timeout) { - evt_struct->timer.data = (unsigned long) evt_struct; evt_struct->timer.expires = jiffies + (timeout * HZ); - evt_struct->timer.function = (void (*)(unsigned long))ibmvscsi_timeout; add_timer(&evt_struct->timer); } - if ((rc = - ibmvscsi_send_crq(hostdata, crq_as_u64[0], crq_as_u64[1])) != 0) { + rc = ibmvscsi_send_crq(hostdata, be64_to_cpu(crq_as_u64[0]), + be64_to_cpu(crq_as_u64[1])); + if (rc != 0) { list_del(&evt_struct->list); - del_timer(&evt_struct->timer); + timer_delete(&evt_struct->timer); /* If send_crq returns H_CLOSED, return SCSI_MLQUEUE_HOST_BUSY. * Firmware will send a CRQ with a transport event (0xFF) to @@ -979,23 +1001,24 @@ static void handle_cmd_rsp(struct srp_event_struct *evt_struct) if (unlikely(rsp->opcode != SRP_RSP)) { if (printk_ratelimit()) dev_warn(evt_struct->hostdata->dev, - "bad SRP RSP type %d\n", rsp->opcode); + "bad SRP RSP type %#02x\n", rsp->opcode); } if (cmnd) { cmnd->result |= rsp->status; - if (((cmnd->result >> 1) & 0x1f) == CHECK_CONDITION) + if (scsi_status_is_check_condition(cmnd->result)) memcpy(cmnd->sense_buffer, rsp->data, - rsp->sense_data_len); + be32_to_cpu(rsp->sense_data_len)); unmap_cmd_data(&evt_struct->iu.srp.cmd, evt_struct, evt_struct->hostdata->dev); if (rsp->flags & SRP_RSP_FLAG_DOOVER) - scsi_set_resid(cmnd, rsp->data_out_res_cnt); + scsi_set_resid(cmnd, + be32_to_cpu(rsp->data_out_res_cnt)); else if (rsp->flags & SRP_RSP_FLAG_DIOVER) - scsi_set_resid(cmnd, rsp->data_in_res_cnt); + scsi_set_resid(cmnd, be32_to_cpu(rsp->data_in_res_cnt)); } if (evt_struct->cmnd_done) @@ -1013,13 +1036,13 @@ static inline u16 lun_from_dev(struct scsi_device *dev) } /** - * ibmvscsi_queue: - The queuecommand function of the scsi template - * @cmd: struct scsi_cmnd to be executed + * ibmvscsi_queuecommand_lck() - The queuecommand function of the scsi template + * @cmnd: struct scsi_cmnd to be executed * @done: Callback function to be called when cmd is completed */ -static int ibmvscsi_queuecommand_lck(struct scsi_cmnd *cmnd, - void (*done) (struct scsi_cmnd *)) +static int ibmvscsi_queuecommand_lck(struct scsi_cmnd *cmnd) { + void (*done)(struct scsi_cmnd *) = scsi_done; struct srp_cmd *srp_cmd; struct srp_event_struct *evt_struct; struct srp_indirect_buf *indirect; @@ -1033,11 +1056,12 @@ static int ibmvscsi_queuecommand_lck(struct scsi_cmnd *cmnd, return SCSI_MLQUEUE_HOST_BUSY; /* Set up the actual SRP IU */ + BUILD_BUG_ON(sizeof(evt_struct->iu.srp) != SRP_MAX_IU_LEN); + memset(&evt_struct->iu.srp, 0x00, sizeof(evt_struct->iu.srp)); srp_cmd = &evt_struct->iu.srp.cmd; - memset(srp_cmd, 0x00, SRP_MAX_IU_LEN); srp_cmd->opcode = SRP_CMD; memcpy(srp_cmd->cdb, cmnd->cmnd, sizeof(srp_cmd->cdb)); - srp_cmd->lun = ((u64) lun) << 48; + int_to_scsilun(lun, &srp_cmd->lun); if (!map_data_for_srp_cmd(cmnd, evt_struct, srp_cmd, hostdata->dev)) { if (!firmware_has_feature(FW_FEATURE_CMO)) @@ -1050,7 +1074,7 @@ static int ibmvscsi_queuecommand_lck(struct scsi_cmnd *cmnd, init_event_struct(evt_struct, handle_cmd_rsp, VIOSRP_SRP_FORMAT, - cmnd->request->timeout/HZ); + scsi_cmd_to_rq(cmnd)->timeout / HZ); evt_struct->cmnd = cmnd; evt_struct->cmnd_done = done; @@ -1062,9 +1086,10 @@ static int ibmvscsi_queuecommand_lck(struct scsi_cmnd *cmnd, if ((in_fmt == SRP_DATA_DESC_INDIRECT || out_fmt == SRP_DATA_DESC_INDIRECT) && indirect->table_desc.va == 0) { - indirect->table_desc.va = evt_struct->crq.IU_data_ptr + + indirect->table_desc.va = + cpu_to_be64(be64_to_cpu(evt_struct->crq.IU_data_ptr) + offsetof(struct srp_cmd, add_data) + - offsetof(struct srp_indirect_buf, desc_list); + offsetof(struct srp_indirect_buf, desc_list)); } return ibmvscsi_send_srp_event(evt_struct, hostdata, 0); @@ -1140,13 +1165,13 @@ static void login_rsp(struct srp_event_struct *evt_struct) dev_info(hostdata->dev, "SRP_LOGIN_REJ reason %u\n", evt_struct->xfer_iu->srp.login_rej.reason); /* Login failed. */ - atomic_set(&hostdata->request_limit, -1); + ibmvscsi_set_request_limit(hostdata, -1); return; default: dev_err(hostdata->dev, "Invalid login response typecode 0x%02x!\n", evt_struct->xfer_iu->srp.login_rsp.opcode); /* Login failed. */ - atomic_set(&hostdata->request_limit, -1); + ibmvscsi_set_request_limit(hostdata, -1); return; } @@ -1157,11 +1182,12 @@ static void login_rsp(struct srp_event_struct *evt_struct) * This value is set rather than added to request_limit because * request_limit could have been set to -1 by this client. */ - atomic_set(&hostdata->request_limit, - evt_struct->xfer_iu->srp.login_rsp.req_lim_delta); + ibmvscsi_set_request_limit(hostdata, + be32_to_cpu(evt_struct->xfer_iu->srp.login_rsp.req_lim_delta)); /* If we had any pending I/Os, kick them */ - scsi_unblock_requests(hostdata->host); + hostdata->action = IBMVSCSI_HOST_ACTION_UNBLOCK; + wake_up(&hostdata->work_wait_q); } /** @@ -1184,16 +1210,17 @@ static int send_srp_login(struct ibmvscsi_host_data *hostdata) login = &evt_struct->iu.srp.login_req; memset(login, 0, sizeof(*login)); login->opcode = SRP_LOGIN_REQ; - login->req_it_iu_len = sizeof(union srp_iu); - login->req_buf_fmt = SRP_BUF_FORMAT_DIRECT | SRP_BUF_FORMAT_INDIRECT; + login->req_it_iu_len = cpu_to_be32(sizeof(union srp_iu)); + login->req_buf_fmt = cpu_to_be16(SRP_BUF_FORMAT_DIRECT | + SRP_BUF_FORMAT_INDIRECT); - spin_lock_irqsave(hostdata->host->host_lock, flags); /* Start out with a request limit of 0, since this is negotiated in * the login request we are just sending and login requests always * get sent by the driver regardless of request_limit. */ - atomic_set(&hostdata->request_limit, 0); + ibmvscsi_set_request_limit(hostdata, 0); + spin_lock_irqsave(hostdata->host->host_lock, flags); rc = ibmvscsi_send_srp_event(evt_struct, hostdata, login_timeout * 2); spin_unlock_irqrestore(hostdata->host->host_lock, flags); dev_info(hostdata->dev, "sent SRP login\n"); @@ -1214,12 +1241,13 @@ static void capabilities_rsp(struct srp_event_struct *evt_struct) dev_err(hostdata->dev, "error 0x%X getting capabilities info\n", evt_struct->xfer_iu->mad.capabilities.common.status); } else { - if (hostdata->caps.migration.common.server_support != SERVER_SUPPORTS_CAP) + if (hostdata->caps.migration.common.server_support != + cpu_to_be16(SERVER_SUPPORTS_CAP)) dev_info(hostdata->dev, "Partition migration not supported\n"); if (client_reserve) { if (hostdata->caps.reserve.common.server_support == - SERVER_SUPPORTS_CAP) + cpu_to_be16(SERVER_SUPPORTS_CAP)) dev_info(hostdata->dev, "Client reserve enabled\n"); else dev_info(hostdata->dev, "Client reserve not supported\n"); @@ -1251,35 +1279,42 @@ static void send_mad_capabilities(struct ibmvscsi_host_data *hostdata) req = &evt_struct->iu.mad.capabilities; memset(req, 0, sizeof(*req)); - hostdata->caps.flags = CAP_LIST_SUPPORTED; + hostdata->caps.flags = cpu_to_be32(CAP_LIST_SUPPORTED); if (hostdata->client_migrated) - hostdata->caps.flags |= CLIENT_MIGRATED; + hostdata->caps.flags |= cpu_to_be32(CLIENT_MIGRATED); - strncpy(hostdata->caps.name, dev_name(&hostdata->host->shost_gendev), + strscpy(hostdata->caps.name, dev_name(&hostdata->host->shost_gendev), sizeof(hostdata->caps.name)); - hostdata->caps.name[sizeof(hostdata->caps.name) - 1] = '\0'; location = of_get_property(of_node, "ibm,loc-code", NULL); location = location ? location : dev_name(hostdata->dev); - strncpy(hostdata->caps.loc, location, sizeof(hostdata->caps.loc)); - hostdata->caps.loc[sizeof(hostdata->caps.loc) - 1] = '\0'; + strscpy(hostdata->caps.loc, location, sizeof(hostdata->caps.loc)); - req->common.type = VIOSRP_CAPABILITIES_TYPE; - req->buffer = hostdata->caps_addr; + req->common.type = cpu_to_be32(VIOSRP_CAPABILITIES_TYPE); + req->buffer = cpu_to_be64(hostdata->caps_addr); - hostdata->caps.migration.common.cap_type = MIGRATION_CAPABILITIES; - hostdata->caps.migration.common.length = sizeof(hostdata->caps.migration); - hostdata->caps.migration.common.server_support = SERVER_SUPPORTS_CAP; - hostdata->caps.migration.ecl = 1; + hostdata->caps.migration.common.cap_type = + cpu_to_be32(MIGRATION_CAPABILITIES); + hostdata->caps.migration.common.length = + cpu_to_be16(sizeof(hostdata->caps.migration)); + hostdata->caps.migration.common.server_support = + cpu_to_be16(SERVER_SUPPORTS_CAP); + hostdata->caps.migration.ecl = cpu_to_be32(1); if (client_reserve) { - hostdata->caps.reserve.common.cap_type = RESERVATION_CAPABILITIES; - hostdata->caps.reserve.common.length = sizeof(hostdata->caps.reserve); - hostdata->caps.reserve.common.server_support = SERVER_SUPPORTS_CAP; - hostdata->caps.reserve.type = CLIENT_RESERVE_SCSI_2; - req->common.length = sizeof(hostdata->caps); + hostdata->caps.reserve.common.cap_type = + cpu_to_be32(RESERVATION_CAPABILITIES); + hostdata->caps.reserve.common.length = + cpu_to_be16(sizeof(hostdata->caps.reserve)); + hostdata->caps.reserve.common.server_support = + cpu_to_be16(SERVER_SUPPORTS_CAP); + hostdata->caps.reserve.type = + cpu_to_be32(CLIENT_RESERVE_SCSI_2); + req->common.length = + cpu_to_be16(sizeof(hostdata->caps)); } else - req->common.length = sizeof(hostdata->caps) - sizeof(hostdata->caps.reserve); + req->common.length = cpu_to_be16(sizeof(hostdata->caps) - + sizeof(hostdata->caps.reserve)); spin_lock_irqsave(hostdata->host->host_lock, flags); if (ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2)) @@ -1297,7 +1332,7 @@ static void send_mad_capabilities(struct ibmvscsi_host_data *hostdata) static void fast_fail_rsp(struct srp_event_struct *evt_struct) { struct ibmvscsi_host_data *hostdata = evt_struct->hostdata; - u8 status = evt_struct->xfer_iu->mad.fast_fail.common.status; + u16 status = be16_to_cpu(evt_struct->xfer_iu->mad.fast_fail.common.status); if (status == VIOSRP_MAD_NOT_SUPPORTED) dev_err(hostdata->dev, "fast_fail not supported in server\n"); @@ -1310,7 +1345,7 @@ static void fast_fail_rsp(struct srp_event_struct *evt_struct) } /** - * init_host - Start host initialization + * enable_fast_fail() - Start host initialization * @hostdata: ibmvscsi_host_data of host * * Returns zero if successful. @@ -1334,8 +1369,8 @@ static int enable_fast_fail(struct ibmvscsi_host_data *hostdata) fast_fail_mad = &evt_struct->iu.mad.fast_fail; memset(fast_fail_mad, 0, sizeof(*fast_fail_mad)); - fast_fail_mad->common.type = VIOSRP_ENABLE_FAST_FAIL; - fast_fail_mad->common.length = sizeof(*fast_fail_mad); + fast_fail_mad->common.type = cpu_to_be32(VIOSRP_ENABLE_FAST_FAIL); + fast_fail_mad->common.length = cpu_to_be16(sizeof(*fast_fail_mad)); spin_lock_irqsave(hostdata->host->host_lock, flags); rc = ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2); @@ -1362,15 +1397,15 @@ static void adapter_info_rsp(struct srp_event_struct *evt_struct) "host partition %s (%d), OS %d, max io %u\n", hostdata->madapter_info.srp_version, hostdata->madapter_info.partition_name, - hostdata->madapter_info.partition_number, - hostdata->madapter_info.os_type, - hostdata->madapter_info.port_max_txu[0]); + be32_to_cpu(hostdata->madapter_info.partition_number), + be32_to_cpu(hostdata->madapter_info.os_type), + be32_to_cpu(hostdata->madapter_info.port_max_txu[0])); if (hostdata->madapter_info.port_max_txu[0]) hostdata->host->max_sectors = - hostdata->madapter_info.port_max_txu[0] >> 9; + be32_to_cpu(hostdata->madapter_info.port_max_txu[0]) >> 9; - if (hostdata->madapter_info.os_type == 3 && + if (be32_to_cpu(hostdata->madapter_info.os_type) == SRP_MAD_OS_AIX && strcmp(hostdata->madapter_info.srp_version, "1.6a") <= 0) { dev_err(hostdata->dev, "host (Ver. %s) doesn't support large transfers\n", hostdata->madapter_info.srp_version); @@ -1379,7 +1414,7 @@ static void adapter_info_rsp(struct srp_event_struct *evt_struct) hostdata->host->sg_tablesize = MAX_INDIRECT_BUFS; } - if (hostdata->madapter_info.os_type == 3) { + if (be32_to_cpu(hostdata->madapter_info.os_type) == SRP_MAD_OS_AIX) { enable_fast_fail(hostdata); return; } @@ -1414,9 +1449,9 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata) req = &evt_struct->iu.mad.adapter_info; memset(req, 0x00, sizeof(*req)); - req->common.type = VIOSRP_ADAPTER_INFO_TYPE; - req->common.length = sizeof(hostdata->madapter_info); - req->buffer = hostdata->adapter_info_addr; + req->common.type = cpu_to_be32(VIOSRP_ADAPTER_INFO_TYPE); + req->common.length = cpu_to_be16(sizeof(hostdata->madapter_info)); + req->buffer = cpu_to_be64(hostdata->adapter_info_addr); spin_lock_irqsave(hostdata->host->host_lock, flags); if (ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2)) @@ -1424,16 +1459,15 @@ static void send_mad_adapter_info(struct ibmvscsi_host_data *hostdata) spin_unlock_irqrestore(hostdata->host->host_lock, flags); }; -/** - * init_adapter: Start virtual adapter initialization sequence - * +/* + * init_adapter() - Start virtual adapter initialization sequence */ static void init_adapter(struct ibmvscsi_host_data *hostdata) { send_mad_adapter_info(hostdata); } -/** +/* * sync_completion: Signal that a synchronous command has completed * Note that after returning from this call, the evt_struct is freed. * the caller waiting on this completion shouldn't touch the evt_struct @@ -1448,8 +1482,8 @@ static void sync_completion(struct srp_event_struct *evt_struct) complete(&evt_struct->comp); } -/** - * ibmvscsi_abort: Abort a command...from scsi host template +/* + * ibmvscsi_eh_abort_handler: Abort a command...from scsi host template * send this over to the server and wait synchronously for the response */ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd) @@ -1501,7 +1535,7 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd) /* Set up an abort SRP command */ memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt)); tsk_mgmt->opcode = SRP_TSK_MGMT; - tsk_mgmt->lun = ((u64) lun) << 48; + int_to_scsilun(lun, &tsk_mgmt->lun); tsk_mgmt->tsk_mgmt_func = SRP_TSK_ABORT_TASK; tsk_mgmt->task_tag = (u64) found_evt; @@ -1586,7 +1620,7 @@ static int ibmvscsi_eh_abort_handler(struct scsi_cmnd *cmd) return SUCCESS; } -/** +/* * ibmvscsi_eh_device_reset_handler: Reset a single LUN...from scsi host * template send this over to the server and wait synchronously for the * response @@ -1624,7 +1658,7 @@ static int ibmvscsi_eh_device_reset_handler(struct scsi_cmnd *cmd) /* Set up a lun reset SRP command */ memset(tsk_mgmt, 0x00, sizeof(*tsk_mgmt)); tsk_mgmt->opcode = SRP_TSK_MGMT; - tsk_mgmt->lun = ((u64) lun) << 48; + int_to_scsilun(lun, &tsk_mgmt->lun); tsk_mgmt->tsk_mgmt_func = SRP_TSK_LUN_RESET; evt->sync_srp = &srp_rsp; @@ -1735,12 +1769,13 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq, { long rc; unsigned long flags; + /* The hypervisor copies our tag value here so no byteswapping */ struct srp_event_struct *evt_struct = - (struct srp_event_struct *)crq->IU_data_ptr; + (__force struct srp_event_struct *)crq->IU_data_ptr; switch (crq->valid) { - case 0xC0: /* initialization */ + case VIOSRP_CRQ_INIT_RSP: /* initialization */ switch (crq->format) { - case 0x01: /* Initialization message */ + case VIOSRP_CRQ_INIT: /* Initialization message */ dev_info(hostdata->dev, "partner initialized\n"); /* Send back a response */ rc = ibmvscsi_send_crq(hostdata, 0xC002000000000000LL, 0); @@ -1752,7 +1787,7 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq, } break; - case 0x02: /* Initialization response */ + case VIOSRP_CRQ_INIT_COMPLETE: /* Initialization response */ dev_info(hostdata->dev, "partner initialization complete\n"); /* Now login */ @@ -1762,14 +1797,14 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq, dev_err(hostdata->dev, "unknown crq message type: %d\n", crq->format); } return; - case 0xFF: /* Hypervisor telling us the connection is closed */ + case VIOSRP_CRQ_XPORT_EVENT: /* Hypervisor telling us the connection is closed */ scsi_block_requests(hostdata->host); - atomic_set(&hostdata->request_limit, 0); + ibmvscsi_set_request_limit(hostdata, 0); if (crq->format == 0x06) { /* We need to re-setup the interpartition connection */ dev_info(hostdata->dev, "Re-enabling adapter!\n"); hostdata->client_migrated = 1; - hostdata->reenable_crq = 1; + hostdata->action = IBMVSCSI_HOST_ACTION_REENABLE; purge_requests(hostdata, DID_REQUEUE); wake_up(&hostdata->work_wait_q); } else { @@ -1778,7 +1813,7 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq, ibmvscsi_reset_host(hostdata); } return; - case 0x80: /* real payload */ + case VIOSRP_CRQ_CMD_RSP: /* real payload */ break; default: dev_err(hostdata->dev, "got an invalid message type 0x%02x\n", @@ -1792,21 +1827,21 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq, */ if (!valid_event_struct(&hostdata->pool, evt_struct)) { dev_err(hostdata->dev, "returned correlation_token 0x%p is invalid!\n", - (void *)crq->IU_data_ptr); + evt_struct); return; } if (atomic_read(&evt_struct->free)) { dev_err(hostdata->dev, "received duplicate correlation_token 0x%p!\n", - (void *)crq->IU_data_ptr); + evt_struct); return; } if (crq->format == VIOSRP_SRP_FORMAT) - atomic_add(evt_struct->xfer_iu->srp.rsp.req_lim_delta, + atomic_add(be32_to_cpu(evt_struct->xfer_iu->srp.rsp.req_lim_delta), &hostdata->request_limit); - del_timer(&evt_struct->timer); + timer_delete(&evt_struct->timer); if ((crq->status != VIOSRP_OK && crq->status != VIOSRP_OK2) && evt_struct->cmnd) evt_struct->cmnd->result = DID_ERROR << 16; @@ -1826,70 +1861,16 @@ static void ibmvscsi_handle_crq(struct viosrp_crq *crq, } /** - * ibmvscsi_get_host_config: Send the command to the server to get host - * configuration data. The data is opaque to us. - */ -static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata, - unsigned char *buffer, int length) -{ - struct viosrp_host_config *host_config; - struct srp_event_struct *evt_struct; - unsigned long flags; - dma_addr_t addr; - int rc; - - evt_struct = get_event_struct(&hostdata->pool); - if (!evt_struct) { - dev_err(hostdata->dev, "couldn't allocate event for HOST_CONFIG!\n"); - return -1; - } - - init_event_struct(evt_struct, - sync_completion, - VIOSRP_MAD_FORMAT, - info_timeout); - - host_config = &evt_struct->iu.mad.host_config; - - /* The transport length field is only 16-bit */ - length = min(0xffff, length); - - /* Set up a lun reset SRP command */ - memset(host_config, 0x00, sizeof(*host_config)); - host_config->common.type = VIOSRP_HOST_CONFIG_TYPE; - host_config->common.length = length; - host_config->buffer = addr = dma_map_single(hostdata->dev, buffer, - length, - DMA_BIDIRECTIONAL); - - if (dma_mapping_error(hostdata->dev, host_config->buffer)) { - if (!firmware_has_feature(FW_FEATURE_CMO)) - dev_err(hostdata->dev, - "dma_mapping error getting host config\n"); - free_event_struct(&hostdata->pool, evt_struct); - return -1; - } - - init_completion(&evt_struct->comp); - spin_lock_irqsave(hostdata->host->host_lock, flags); - rc = ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2); - spin_unlock_irqrestore(hostdata->host->host_lock, flags); - if (rc == 0) - wait_for_completion(&evt_struct->comp); - dma_unmap_single(hostdata->dev, addr, length, DMA_BIDIRECTIONAL); - - return rc; -} - -/** - * ibmvscsi_slave_configure: Set the "allow_restart" flag for each disk. + * ibmvscsi_sdev_configure: Set the "allow_restart" flag for each disk. * @sdev: struct scsi_device device to configure + * @lim: Request queue limits * * Enable allow_restart for a device if it is a disk. Adjust the * queue_depth here also as is required by the documentation for * struct scsi_host_template. */ -static int ibmvscsi_slave_configure(struct scsi_device *sdev) +static int ibmvscsi_sdev_configure(struct scsi_device *sdev, + struct queue_limits *lim) { struct Scsi_Host *shost = sdev->host; unsigned long lock_flags = 0; @@ -1900,7 +1881,6 @@ static int ibmvscsi_slave_configure(struct scsi_device *sdev) blk_queue_rq_timeout(sdev->request_queue, 120 * HZ); } spin_unlock_irqrestore(shost->host_lock, lock_flags); - scsi_adjust_queue_depth(sdev, 0, shost->cmd_per_lun); return 0; } @@ -1908,22 +1888,15 @@ static int ibmvscsi_slave_configure(struct scsi_device *sdev) * ibmvscsi_change_queue_depth - Change the device's queue depth * @sdev: scsi device struct * @qdepth: depth to set - * @reason: calling context * * Return value: * actual depth set **/ -static int ibmvscsi_change_queue_depth(struct scsi_device *sdev, int qdepth, - int reason) +static int ibmvscsi_change_queue_depth(struct scsi_device *sdev, int qdepth) { - if (reason != SCSI_QDEPTH_DEFAULT) - return -EOPNOTSUPP; - if (qdepth > IBMVSCSI_MAX_CMDS_PER_LUN) qdepth = IBMVSCSI_MAX_CMDS_PER_LUN; - - scsi_adjust_queue_depth(sdev, 0, qdepth); - return sdev->queue_depth; + return scsi_change_queue_depth(sdev, qdepth); } /* ------------------------------------------------------------ @@ -2019,7 +1992,7 @@ static ssize_t show_host_partition_number(struct device *dev, int len; len = snprintf(buf, PAGE_SIZE, "%d\n", - hostdata->madapter_info.partition_number); + be32_to_cpu(hostdata->madapter_info.partition_number)); return len; } @@ -2039,7 +2012,7 @@ static ssize_t show_host_mad_version(struct device *dev, int len; len = snprintf(buf, PAGE_SIZE, "%d\n", - hostdata->madapter_info.mad_version); + be32_to_cpu(hostdata->madapter_info.mad_version)); return len; } @@ -2058,7 +2031,8 @@ static ssize_t show_host_os_type(struct device *dev, struct ibmvscsi_host_data *hostdata = shost_priv(shost); int len; - len = snprintf(buf, PAGE_SIZE, "%d\n", hostdata->madapter_info.os_type); + len = snprintf(buf, PAGE_SIZE, "%d\n", + be32_to_cpu(hostdata->madapter_info.os_type)); return len; } @@ -2073,36 +2047,41 @@ static struct device_attribute ibmvscsi_host_os_type = { static ssize_t show_host_config(struct device *dev, struct device_attribute *attr, char *buf) { - struct Scsi_Host *shost = class_to_shost(dev); - struct ibmvscsi_host_data *hostdata = shost_priv(shost); - - /* returns null-terminated host config data */ - if (ibmvscsi_do_host_config(hostdata, buf, PAGE_SIZE) == 0) - return strlen(buf); - else - return 0; + return 0; } static struct device_attribute ibmvscsi_host_config = { .attr = { - .name = "config", - .mode = S_IRUGO, - }, + .name = "config", + .mode = S_IRUGO, + }, .show = show_host_config, }; -static struct device_attribute *ibmvscsi_attrs[] = { - &ibmvscsi_host_vhost_loc, - &ibmvscsi_host_vhost_name, - &ibmvscsi_host_srp_version, - &ibmvscsi_host_partition_name, - &ibmvscsi_host_partition_number, - &ibmvscsi_host_mad_version, - &ibmvscsi_host_os_type, - &ibmvscsi_host_config, +static int ibmvscsi_host_reset(struct Scsi_Host *shost, int reset_type) +{ + struct ibmvscsi_host_data *hostdata = shost_priv(shost); + + dev_info(hostdata->dev, "Initiating adapter reset!\n"); + ibmvscsi_reset_host(hostdata); + + return 0; +} + +static struct attribute *ibmvscsi_host_attrs[] = { + &ibmvscsi_host_vhost_loc.attr, + &ibmvscsi_host_vhost_name.attr, + &ibmvscsi_host_srp_version.attr, + &ibmvscsi_host_partition_name.attr, + &ibmvscsi_host_partition_number.attr, + &ibmvscsi_host_mad_version.attr, + &ibmvscsi_host_os_type.attr, + &ibmvscsi_host_config.attr, NULL }; +ATTRIBUTE_GROUPS(ibmvscsi_host); + /* ------------------------------------------------------------ * SCSI driver registration */ @@ -2111,17 +2090,18 @@ static struct scsi_host_template driver_template = { .name = "IBM POWER Virtual SCSI Adapter " IBMVSCSI_VERSION, .proc_name = "ibmvscsi", .queuecommand = ibmvscsi_queuecommand, + .eh_timed_out = srp_timed_out, .eh_abort_handler = ibmvscsi_eh_abort_handler, .eh_device_reset_handler = ibmvscsi_eh_device_reset_handler, .eh_host_reset_handler = ibmvscsi_eh_host_reset_handler, - .slave_configure = ibmvscsi_slave_configure, + .sdev_configure = ibmvscsi_sdev_configure, .change_queue_depth = ibmvscsi_change_queue_depth, + .host_reset = ibmvscsi_host_reset, .cmd_per_lun = IBMVSCSI_CMDS_PER_LUN_DEFAULT, .can_queue = IBMVSCSI_MAX_REQUESTS_DEFAULT, .this_id = -1, .sg_tablesize = SG_ALL, - .use_clustering = ENABLE_CLUSTERING, - .shost_attrs = ibmvscsi_attrs, + .shost_groups = ibmvscsi_host_groups, }; /** @@ -2146,48 +2126,75 @@ static unsigned long ibmvscsi_get_desired_dma(struct vio_dev *vdev) static void ibmvscsi_do_work(struct ibmvscsi_host_data *hostdata) { + unsigned long flags; int rc; char *action = "reset"; - if (hostdata->reset_crq) { - smp_rmb(); - hostdata->reset_crq = 0; - + spin_lock_irqsave(hostdata->host->host_lock, flags); + switch (hostdata->action) { + case IBMVSCSI_HOST_ACTION_UNBLOCK: + rc = 0; + break; + case IBMVSCSI_HOST_ACTION_RESET: + spin_unlock_irqrestore(hostdata->host->host_lock, flags); rc = ibmvscsi_reset_crq_queue(&hostdata->queue, hostdata); + spin_lock_irqsave(hostdata->host->host_lock, flags); if (!rc) rc = ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0); vio_enable_interrupts(to_vio_dev(hostdata->dev)); - } else if (hostdata->reenable_crq) { - smp_rmb(); + break; + case IBMVSCSI_HOST_ACTION_REENABLE: action = "enable"; + spin_unlock_irqrestore(hostdata->host->host_lock, flags); rc = ibmvscsi_reenable_crq_queue(&hostdata->queue, hostdata); - hostdata->reenable_crq = 0; + spin_lock_irqsave(hostdata->host->host_lock, flags); if (!rc) rc = ibmvscsi_send_crq(hostdata, 0xC001000000000000LL, 0); - } else + break; + case IBMVSCSI_HOST_ACTION_NONE: + default: + spin_unlock_irqrestore(hostdata->host->host_lock, flags); return; + } + + hostdata->action = IBMVSCSI_HOST_ACTION_NONE; + spin_unlock_irqrestore(hostdata->host->host_lock, flags); if (rc) { - atomic_set(&hostdata->request_limit, -1); + ibmvscsi_set_request_limit(hostdata, -1); dev_err(hostdata->dev, "error after %s\n", action); } scsi_unblock_requests(hostdata->host); } -static int ibmvscsi_work_to_do(struct ibmvscsi_host_data *hostdata) +static int __ibmvscsi_work_to_do(struct ibmvscsi_host_data *hostdata) { if (kthread_should_stop()) return 1; - else if (hostdata->reset_crq) { - smp_rmb(); - return 1; - } else if (hostdata->reenable_crq) { - smp_rmb(); - return 1; + switch (hostdata->action) { + case IBMVSCSI_HOST_ACTION_NONE: + return 0; + case IBMVSCSI_HOST_ACTION_RESET: + case IBMVSCSI_HOST_ACTION_REENABLE: + case IBMVSCSI_HOST_ACTION_UNBLOCK: + default: + break; } - return 0; + return 1; +} + +static int ibmvscsi_work_to_do(struct ibmvscsi_host_data *hostdata) +{ + unsigned long flags; + int rc; + + spin_lock_irqsave(hostdata->host->host_lock, flags); + rc = __ibmvscsi_work_to_do(hostdata); + spin_unlock_irqrestore(hostdata->host->host_lock, flags); + + return rc; } static int ibmvscsi_work(void *data) @@ -2195,7 +2202,7 @@ static int ibmvscsi_work(void *data) struct ibmvscsi_host_data *hostdata = data; int rc; - set_user_nice(current, -20); + set_user_nice(current, MIN_NICE); while (1) { rc = wait_event_interruptible(hostdata->work_wait_q, @@ -2212,7 +2219,7 @@ static int ibmvscsi_work(void *data) return 0; } -/** +/* * Called by bus code for each adapter */ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) @@ -2240,7 +2247,7 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) init_waitqueue_head(&hostdata->work_wait_q); hostdata->host = host; hostdata->dev = dev; - atomic_set(&hostdata->request_limit, -1); + ibmvscsi_set_request_limit(hostdata, -1); hostdata->host->max_sectors = IBMVSCSI_MAX_SECTORS_DEFAULT; if (map_persist_bufs(hostdata)) { @@ -2267,11 +2274,15 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) goto init_pool_failed; } - host->max_lun = 8; + host->max_lun = IBMVSCSI_MAX_LUN; host->max_id = max_id; host->max_channel = max_channel; host->max_cmd_len = 16; + dev_info(dev, + "Maximum ID: %d Maximum LUN: %llu Maximum Channel: %d\n", + host->max_id, host->max_lun, host->max_channel); + if (scsi_add_host(hostdata->host, hostdata->dev)) goto add_host_failed; @@ -2308,6 +2319,9 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) } dev_set_drvdata(&vdev->dev, hostdata); + spin_lock(&ibmvscsi_driver_lock); + list_add_tail(&hostdata->host_list, &ibmvscsi_head); + spin_unlock(&ibmvscsi_driver_lock); return 0; add_srp_port_failed: @@ -2326,20 +2340,27 @@ static int ibmvscsi_probe(struct vio_dev *vdev, const struct vio_device_id *id) return -1; } -static int ibmvscsi_remove(struct vio_dev *vdev) +static void ibmvscsi_remove(struct vio_dev *vdev) { struct ibmvscsi_host_data *hostdata = dev_get_drvdata(&vdev->dev); - unmap_persist_bufs(hostdata); + + srp_remove_host(hostdata->host); + scsi_remove_host(hostdata->host); + + purge_requests(hostdata, DID_ERROR); release_event_pool(&hostdata->pool, hostdata); + ibmvscsi_release_crq_queue(&hostdata->queue, hostdata, max_events); kthread_stop(hostdata->work_thread); - srp_remove_host(hostdata->host); - scsi_remove_host(hostdata->host); - scsi_host_put(hostdata->host); + unmap_persist_bufs(hostdata); - return 0; + spin_lock(&ibmvscsi_driver_lock); + list_del(&hostdata->host_list); + spin_unlock(&ibmvscsi_driver_lock); + + scsi_host_put(hostdata->host); } /** @@ -2358,17 +2379,17 @@ static int ibmvscsi_resume(struct device *dev) return 0; } -/** +/* * ibmvscsi_device_table: Used by vio.c to match devices in the device tree we * support. */ -static struct vio_device_id ibmvscsi_device_table[] = { +static const struct vio_device_id ibmvscsi_device_table[] = { {"vscsi", "IBM,v-scsi"}, { "", "" } }; MODULE_DEVICE_TABLE(vio, ibmvscsi_device_table); -static struct dev_pm_ops ibmvscsi_pm_ops = { +static const struct dev_pm_ops ibmvscsi_pm_ops = { .resume = ibmvscsi_resume }; @@ -2384,7 +2405,7 @@ static struct vio_driver ibmvscsi_driver = { static struct srp_function_template ibmvscsi_transport_functions = { }; -int __init ibmvscsi_module_init(void) +static int __init ibmvscsi_module_init(void) { int ret; @@ -2406,7 +2427,7 @@ int __init ibmvscsi_module_init(void) return ret; } -void __exit ibmvscsi_module_exit(void) +static void __exit ibmvscsi_module_exit(void) { vio_unregister_driver(&ibmvscsi_driver); srp_release_transport(ibmvscsi_transport_template); |