/**
* mgmt_open_connection()- Establish a TCP CXN
* @dst_addr: Destination Address
* @beiscsi_ep: ptr to device endpoint struct
* @nonemb_cmd: ptr to memory allocated for command
*
* return
* Success: Tag number of the MBX Command issued
* Failure: Error code
**/
int mgmt_open_connection(struct beiscsi_hba *phba,
struct sockaddr *dst_addr,
struct beiscsi_endpoint *beiscsi_ep,
struct be_dma_mem *nonemb_cmd)
{
struct hwi_controller *phwi_ctrlr;
struct hwi_context_memory *phwi_context;
struct sockaddr_in *daddr_in = (struct sockaddr_in *)dst_addr;
struct sockaddr_in6 *daddr_in6 = (struct sockaddr_in6 *)dst_addr;
struct be_ctrl_info *ctrl = &phba->ctrl;
struct be_mcc_wrb *wrb;
struct tcp_connect_and_offload_in_v1 *req;
unsigned short def_hdr_id;
unsigned short def_data_id;
struct phys_addr template_address = { 0, 0 };
struct phys_addr *ptemplate_address;
unsigned int tag = 0;
unsigned int i, ulp_num;
unsigned short cid = beiscsi_ep->ep_cid;
struct be_sge *sge;
phwi_ctrlr = phba->phwi_ctrlr;
phwi_context = phwi_ctrlr->phwi_ctxt;
ulp_num = phwi_ctrlr->wrb_context[BE_GET_CRI_FROM_CID(cid)].ulp_num;
def_hdr_id = (unsigned short)HWI_GET_DEF_HDRQ_ID(phba, ulp_num);
def_data_id = (unsigned short)HWI_GET_DEF_BUFQ_ID(phba, ulp_num);
ptemplate_address = &template_address;
ISCSI_GET_PDU_TEMPLATE_ADDRESS(phba, ptemplate_address);
spin_lock(&ctrl->mbox_lock);
tag = alloc_mcc_tag(phba);
if (!tag) {
spin_unlock(&ctrl->mbox_lock);
return tag;
}
wrb = wrb_from_mccq(phba);
sge = nonembedded_sgl(wrb);
req = nonemb_cmd->va;
memset(req, 0, sizeof(*req));
wrb->tag0 |= tag;
be_wrb_hdr_prepare(wrb, nonemb_cmd->size, false, 1);
be_cmd_hdr_prepare(&req->hdr, CMD_SUBSYSTEM_ISCSI,
OPCODE_COMMON_ISCSI_TCP_CONNECT_AND_OFFLOAD,
nonemb_cmd->size);
if (dst_addr->sa_family == PF_INET) {
__be32 s_addr = daddr_in->sin_addr.s_addr;
req->ip_address.ip_type = BE2_IPV4;
req->ip_address.addr[0] = s_addr & 0x000000ff;
req->ip_address.addr[1] = (s_addr & 0x0000ff00) >> 8;
req->ip_address.addr[2] = (s_addr & 0x00ff0000) >> 16;
req->ip_address.addr[3] = (s_addr & 0xff000000) >> 24;
req->tcp_port = ntohs(daddr_in->sin_port);
beiscsi_ep->dst_addr = daddr_in->sin_addr.s_addr;
beiscsi_ep->dst_tcpport = ntohs(daddr_in->sin_port);
beiscsi_ep->ip_type = BE2_IPV4;
} else if (dst_addr->sa_family == PF_INET6) {
/**
* beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
* @cls_session: pointer to iscsi cls session
* @cls_conn: pointer to iscsi cls conn
* @transport_fd: EP handle(64 bit)
*
* This function binds the TCP Conn with iSCSI Connection and Session.
*/
int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn,
u64 transport_fd, int is_leading)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct beiscsi_conn *beiscsi_conn = conn->dd_data;
struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
struct beiscsi_hba *phba = iscsi_host_priv(shost);
struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
struct hwi_wrb_context *pwrb_context;
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_endpoint *ep;
uint16_t cri_index;
ep = iscsi_lookup_endpoint(transport_fd);
if (!ep)
return -EINVAL;
beiscsi_ep = ep->dd_data;
if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
return -EINVAL;
if (beiscsi_ep->phba != phba) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
beiscsi_ep->phba, phba);
return -EEXIST;
}
cri_index = BE_GET_CRI_FROM_CID(beiscsi_ep->ep_cid);
if (phba->conn_table[cri_index]) {
if (beiscsi_conn != phba->conn_table[cri_index] ||
beiscsi_ep != phba->conn_table[cri_index]->ep) {
__beiscsi_log(phba, KERN_ERR,
"BS_%d : conn_table not empty at %u: cid %u conn %p:%p\n",
cri_index,
beiscsi_ep->ep_cid,
beiscsi_conn,
phba->conn_table[cri_index]);
return -EINVAL;
}
}
beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
beiscsi_conn->ep = beiscsi_ep;
beiscsi_ep->conn = beiscsi_conn;
/**
* Each connection is associated with a WRBQ kept in wrb_context.
* Store doorbell offset for transmit path.
*/
pwrb_context = &phwi_ctrlr->wrb_context[cri_index];
beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : cid %d phba->conn_table[%u]=%p\n",
beiscsi_ep->ep_cid, cri_index, beiscsi_conn);
phba->conn_table[cri_index] = beiscsi_conn;
return 0;
}
/**
* beiscsi_conn_bind - Binds iscsi session/connection with TCP connection
* @cls_session: pointer to iscsi cls session
* @cls_conn: pointer to iscsi cls conn
* @transport_fd: EP handle(64 bit)
*
* This function binds the TCP Conn with iSCSI Connection and Session.
*/
int beiscsi_conn_bind(struct iscsi_cls_session *cls_session,
struct iscsi_cls_conn *cls_conn,
u64 transport_fd, int is_leading)
{
struct iscsi_conn *conn = cls_conn->dd_data;
struct beiscsi_conn *beiscsi_conn = conn->dd_data;
struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
struct beiscsi_hba *phba = iscsi_host_priv(shost);
struct hwi_controller *phwi_ctrlr = phba->phwi_ctrlr;
struct hwi_wrb_context *pwrb_context;
struct beiscsi_endpoint *beiscsi_ep;
struct iscsi_endpoint *ep;
ep = iscsi_lookup_endpoint(transport_fd);
if (!ep)
return -EINVAL;
beiscsi_ep = ep->dd_data;
if (iscsi_conn_bind(cls_session, cls_conn, is_leading))
return -EINVAL;
if (beiscsi_ep->phba != phba) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : beiscsi_ep->hba=%p not equal to phba=%p\n",
beiscsi_ep->phba, phba);
return -EEXIST;
}
pwrb_context = &phwi_ctrlr->wrb_context[BE_GET_CRI_FROM_CID(
beiscsi_ep->ep_cid)];
beiscsi_conn->beiscsi_conn_cid = beiscsi_ep->ep_cid;
beiscsi_conn->ep = beiscsi_ep;
beiscsi_ep->conn = beiscsi_conn;
beiscsi_conn->doorbell_offset = pwrb_context->doorbell_offset;
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : beiscsi_conn=%p conn=%p ep_cid=%d\n",
beiscsi_conn, conn, beiscsi_ep->ep_cid);
return beiscsi_bindconn_cid(phba, beiscsi_conn, beiscsi_ep->ep_cid);
}
/**
* beiscsi_bindconn_cid - Bind the beiscsi_conn with phba connection table
* @beiscsi_conn: The pointer to beiscsi_conn structure
* @phba: The phba instance
* @cid: The cid to free
*/
static int beiscsi_bindconn_cid(struct beiscsi_hba *phba,
struct beiscsi_conn *beiscsi_conn,
unsigned int cid)
{
uint16_t cri_index = BE_GET_CRI_FROM_CID(cid);
if (phba->conn_table[cri_index]) {
beiscsi_log(phba, KERN_ERR, BEISCSI_LOG_CONFIG,
"BS_%d : Connection table already occupied. Detected clash\n");
return -EINVAL;
} else {
beiscsi_log(phba, KERN_INFO, BEISCSI_LOG_CONFIG,
"BS_%d : phba->conn_table[%d]=%p(beiscsi_conn)\n",
cri_index, beiscsi_conn);
phba->conn_table[cri_index] = beiscsi_conn;
}
return 0;
}