From 72264eb6dbb9090265f6c87e49db78c4306bc1c3 Mon Sep 17 00:00:00 2001 From: Anton Blanchard Date: Tue, 3 Sep 2013 10:04:47 +1000 Subject: [PATCH] [SCSI] ibmvscsi: Fix little endian issues The hypervisor is big endian, so little endian kernel builds need to byteswap. [jejb: fix checkpatch errors] Signed-off-by: Anton Blanchard Signed-off-by: James Bottomley --- drivers/scsi/ibmvscsi/ibmvscsi.c | 154 +++++++++++++++++-------------- drivers/scsi/ibmvscsi/viosrp.h | 46 ++++----- 2 files changed, 109 insertions(+), 91 deletions(-) diff --git a/drivers/scsi/ibmvscsi/ibmvscsi.c b/drivers/scsi/ibmvscsi/ibmvscsi.c index d0fa4b6c551f..fa764406df68 100644 --- a/drivers/scsi/ibmvscsi/ibmvscsi.c +++ b/drivers/scsi/ibmvscsi/ibmvscsi.c @@ -241,7 +241,7 @@ 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("/"); @@ -255,7 +255,7 @@ static void gather_partition_info(void) sizeof(partition_name)); p_number_ptr = of_get_property(rootdn, "ibm,partition-no", NULL); if (p_number_ptr) - partition_number = *p_number_ptr; + partition_number = of_read_number(p_number_ptr, 1); of_node_put(rootdn); } @@ -270,10 +270,11 @@ static void set_adapter_info(struct ibmvscsi_host_data *hostdata) strncpy(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(1); + hostdata->madapter_info.os_type = cpu_to_be32(2); } /** @@ -464,9 +465,9 @@ static int initialize_event_pool(struct event_pool *pool, 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.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; @@ -588,7 +589,7 @@ 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; } @@ -659,8 +660,8 @@ 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); } @@ -703,13 +704,14 @@ 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; } @@ -731,9 +733,10 @@ 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; @@ -849,7 +852,7 @@ 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; @@ -920,8 +923,9 @@ static int ibmvscsi_send_srp_event(struct srp_event_struct *evt_struct, 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); @@ -987,15 +991,16 @@ static void handle_cmd_rsp(struct srp_event_struct *evt_struct) if (((cmnd->result >> 1) & 0x1f) == CHECK_CONDITION) 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) @@ -1037,7 +1042,7 @@ static int ibmvscsi_queuecommand_lck(struct scsi_cmnd *cmnd, 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; + srp_cmd->lun = cpu_to_be64(((u64)lun) << 48); if (!map_data_for_srp_cmd(cmnd, evt_struct, srp_cmd, hostdata->dev)) { if (!firmware_has_feature(FW_FEATURE_CMO)) @@ -1062,9 +1067,10 @@ 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); @@ -1158,7 +1164,7 @@ static void login_rsp(struct srp_event_struct *evt_struct) * 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); + 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); @@ -1184,8 +1190,9 @@ 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 @@ -1214,12 +1221,13 @@ 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"); @@ -1251,9 +1259,9 @@ 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), sizeof(hostdata->caps.name)); @@ -1264,22 +1272,31 @@ static void send_mad_capabilities(struct ibmvscsi_host_data *hostdata) strncpy(hostdata->caps.loc, location, sizeof(hostdata->caps.loc)); hostdata->caps.loc[sizeof(hostdata->caps.loc) - 1] = '\0'; - 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 +1314,7 @@ 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"); @@ -1334,8 +1351,8 @@ 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 +1379,15 @@ 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) == 3 && 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 +1396,7 @@ 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) == 3) { enable_fast_fail(hostdata); return; } @@ -1414,9 +1431,9 @@ 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)) @@ -1501,7 +1518,7 @@ 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; + tsk_mgmt->lun = cpu_to_be64(((u64) lun) << 48); tsk_mgmt->tsk_mgmt_func = SRP_TSK_ABORT_TASK; tsk_mgmt->task_tag = (u64) found_evt; @@ -1624,7 +1641,7 @@ 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; + tsk_mgmt->lun = cpu_to_be64(((u64) lun) << 48); tsk_mgmt->tsk_mgmt_func = SRP_TSK_LUN_RESET; evt->sync_srp = &srp_rsp; @@ -1735,8 +1752,9 @@ 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 */ switch (crq->format) { @@ -1792,18 +1810,18 @@ 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); @@ -1856,13 +1874,11 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata, /* 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); + host_config->common.type = cpu_to_be32(VIOSRP_HOST_CONFIG_TYPE); + host_config->common.length = cpu_to_be16(length); + addr = dma_map_single(hostdata->dev, buffer, length, DMA_BIDIRECTIONAL); - if (dma_mapping_error(hostdata->dev, host_config->buffer)) { + if (dma_mapping_error(hostdata->dev, addr)) { if (!firmware_has_feature(FW_FEATURE_CMO)) dev_err(hostdata->dev, "dma_mapping error getting host config\n"); @@ -1870,6 +1886,8 @@ static int ibmvscsi_do_host_config(struct ibmvscsi_host_data *hostdata, return -1; } + host_config->buffer = cpu_to_be64(addr); + init_completion(&evt_struct->comp); spin_lock_irqsave(hostdata->host->host_lock, flags); rc = ibmvscsi_send_srp_event(evt_struct, hostdata, info_timeout * 2); diff --git a/drivers/scsi/ibmvscsi/viosrp.h b/drivers/scsi/ibmvscsi/viosrp.h index 2cd735d1d196..116243087622 100644 --- a/drivers/scsi/ibmvscsi/viosrp.h +++ b/drivers/scsi/ibmvscsi/viosrp.h @@ -75,9 +75,9 @@ struct viosrp_crq { u8 format; /* SCSI vs out-of-band */ u8 reserved; u8 status; /* non-scsi failure? (e.g. DMA failure) */ - u16 timeout; /* in seconds */ - u16 IU_length; /* in bytes */ - u64 IU_data_ptr; /* the TCE for transferring data */ + __be16 timeout; /* in seconds */ + __be16 IU_length; /* in bytes */ + __be64 IU_data_ptr; /* the TCE for transferring data */ }; /* MADs are Management requests above and beyond the IUs defined in the SRP @@ -124,10 +124,10 @@ enum viosrp_capability_flag { * Common MAD header */ struct mad_common { - u32 type; - u16 status; - u16 length; - u64 tag; + __be32 type; + __be16 status; + __be16 length; + __be64 tag; }; /* @@ -139,23 +139,23 @@ struct mad_common { */ struct viosrp_empty_iu { struct mad_common common; - u64 buffer; - u32 port; + __be64 buffer; + __be32 port; }; struct viosrp_error_log { struct mad_common common; - u64 buffer; + __be64 buffer; }; struct viosrp_adapter_info { struct mad_common common; - u64 buffer; + __be64 buffer; }; struct viosrp_host_config { struct mad_common common; - u64 buffer; + __be64 buffer; }; struct viosrp_fast_fail { @@ -164,27 +164,27 @@ struct viosrp_fast_fail { struct viosrp_capabilities { struct mad_common common; - u64 buffer; + __be64 buffer; }; struct mad_capability_common { - u32 cap_type; - u16 length; - u16 server_support; + __be32 cap_type; + __be16 length; + __be16 server_support; }; struct mad_reserve_cap { struct mad_capability_common common; - u32 type; + __be32 type; }; struct mad_migration_cap { struct mad_capability_common common; - u32 ecl; + __be32 ecl; }; struct capabilities{ - u32 flags; + __be32 flags; char name[SRP_MAX_LOC_LEN]; char loc[SRP_MAX_LOC_LEN]; struct mad_migration_cap migration; @@ -208,10 +208,10 @@ union viosrp_iu { struct mad_adapter_info_data { char srp_version[8]; char partition_name[96]; - u32 partition_number; - u32 mad_version; - u32 os_type; - u32 port_max_txu[8]; /* per-port maximum transfer */ + __be32 partition_number; + __be32 mad_version; + __be32 os_type; + __be32 port_max_txu[8]; /* per-port maximum transfer */ }; #endif