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Diffstat (limited to 'drivers/scsi/bfa/loop.c')
-rw-r--r--drivers/scsi/bfa/loop.c422
1 files changed, 422 insertions, 0 deletions
diff --git a/drivers/scsi/bfa/loop.c b/drivers/scsi/bfa/loop.c
new file mode 100644
index 00000000000..a418dedebe9
--- /dev/null
+++ b/drivers/scsi/bfa/loop.c
@@ -0,0 +1,422 @@
+/*
+ * Copyright (c) 2005-2009 Brocade Communications Systems, Inc.
+ * All rights reserved
+ * www.brocade.com
+ *
+ * Linux driver for Brocade Fibre Channel Host Bus Adapter.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License (GPL) Version 2 as
+ * published by the Free Software Foundation
+ *
+ * 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.
+ */
+
+/**
+ * port_loop.c vport private loop implementation.
+ */
+#include <bfa.h>
+#include <bfa_svc.h>
+#include "fcs_lport.h"
+#include "fcs_rport.h"
+#include "fcs_trcmod.h"
+#include "lport_priv.h"
+
+BFA_TRC_FILE(FCS, LOOP);
+
+/**
+ * ALPA to LIXA bitmap mapping
+ *
+ * ALPA 0x00 (Word 0, Bit 30) is invalid for N_Ports. Also Word 0 Bit 31
+ * is for L_bit (login required) and is filled as ALPA 0x00 here.
+ */
+static const u8 port_loop_alpa_map[] = {
+ 0xEF, 0xE8, 0xE4, 0xE2, 0xE1, 0xE0, 0xDC, 0xDA, /* Word 3 Bits 0..7 */
+ 0xD9, 0xD6, 0xD5, 0xD4, 0xD3, 0xD2, 0xD1, 0xCE, /* Word 3 Bits 8..15 */
+ 0xCD, 0xCC, 0xCB, 0xCA, 0xC9, 0xC7, 0xC6, 0xC5, /* Word 3 Bits 16..23 */
+ 0xC3, 0xBC, 0xBA, 0xB9, 0xB6, 0xB5, 0xB4, 0xB3, /* Word 3 Bits 24..31 */
+
+ 0xB2, 0xB1, 0xAE, 0xAD, 0xAC, 0xAB, 0xAA, 0xA9, /* Word 2 Bits 0..7 */
+ 0xA7, 0xA6, 0xA5, 0xA3, 0x9F, 0x9E, 0x9D, 0x9B, /* Word 2 Bits 8..15 */
+ 0x98, 0x97, 0x90, 0x8F, 0x88, 0x84, 0x82, 0x81, /* Word 2 Bits 16..23 */
+ 0x80, 0x7C, 0x7A, 0x79, 0x76, 0x75, 0x74, 0x73, /* Word 2 Bits 24..31 */
+
+ 0x72, 0x71, 0x6E, 0x6D, 0x6C, 0x6B, 0x6A, 0x69, /* Word 1 Bits 0..7 */
+ 0x67, 0x66, 0x65, 0x63, 0x5C, 0x5A, 0x59, 0x56, /* Word 1 Bits 8..15 */
+ 0x55, 0x54, 0x53, 0x52, 0x51, 0x4E, 0x4D, 0x4C, /* Word 1 Bits 16..23 */
+ 0x4B, 0x4A, 0x49, 0x47, 0x46, 0x45, 0x43, 0x3C, /* Word 1 Bits 24..31 */
+
+ 0x3A, 0x39, 0x36, 0x35, 0x34, 0x33, 0x32, 0x31, /* Word 0 Bits 0..7 */
+ 0x2E, 0x2D, 0x2C, 0x2B, 0x2A, 0x29, 0x27, 0x26, /* Word 0 Bits 8..15 */
+ 0x25, 0x23, 0x1F, 0x1E, 0x1D, 0x1B, 0x18, 0x17, /* Word 0 Bits 16..23 */
+ 0x10, 0x0F, 0x08, 0x04, 0x02, 0x01, 0x00, 0x00, /* Word 0 Bits 24..31 */
+};
+
+/*
+ * Local Functions
+ */
+bfa_status_t bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port,
+ u8 alpa);
+
+void bfa_fcs_port_loop_plogi_response(void *fcsarg,
+ struct bfa_fcxp_s *fcxp,
+ void *cbarg,
+ bfa_status_t req_status,
+ u32 rsp_len,
+ u32 resid_len,
+ struct fchs_s *rsp_fchs);
+
+bfa_status_t bfa_fcs_port_loop_send_adisc(struct bfa_fcs_port_s *port,
+ u8 alpa);
+
+void bfa_fcs_port_loop_adisc_response(void *fcsarg,
+ struct bfa_fcxp_s *fcxp,
+ void *cbarg,
+ bfa_status_t req_status,
+ u32 rsp_len,
+ u32 resid_len,
+ struct fchs_s *rsp_fchs);
+
+bfa_status_t bfa_fcs_port_loop_send_plogi_acc(struct bfa_fcs_port_s *port,
+ u8 alpa);
+
+void bfa_fcs_port_loop_plogi_acc_response(void *fcsarg,
+ struct bfa_fcxp_s *fcxp,
+ void *cbarg,
+ bfa_status_t req_status,
+ u32 rsp_len,
+ u32 resid_len,
+ struct fchs_s *rsp_fchs);
+
+bfa_status_t bfa_fcs_port_loop_send_adisc_acc(struct bfa_fcs_port_s *port,
+ u8 alpa);
+
+void bfa_fcs_port_loop_adisc_acc_response(void *fcsarg,
+ struct bfa_fcxp_s *fcxp,
+ void *cbarg,
+ bfa_status_t req_status,
+ u32 rsp_len,
+ u32 resid_len,
+ struct fchs_s *rsp_fchs);
+/**
+ * Called by port to initializar in provate LOOP topology.
+ */
+void
+bfa_fcs_port_loop_init(struct bfa_fcs_port_s *port)
+{
+}
+
+/**
+ * Called by port to notify transition to online state.
+ */
+void
+bfa_fcs_port_loop_online(struct bfa_fcs_port_s *port)
+{
+
+ u8 num_alpa = port->port_topo.ploop.num_alpa;
+ u8 *alpa_pos_map = port->port_topo.ploop.alpa_pos_map;
+ struct bfa_fcs_rport_s *r_port;
+ int ii = 0;
+
+ /*
+ * If the port role is Initiator Mode, create Rports.
+ */
+ if (port->port_cfg.roles == BFA_PORT_ROLE_FCP_IM) {
+ /*
+ * Check if the ALPA positional bitmap is available.
+ * if not, we send PLOGI to all possible ALPAs.
+ */
+ if (num_alpa > 0) {
+ for (ii = 0; ii < num_alpa; ii++) {
+ /*
+ * ignore ALPA of bfa port
+ */
+ if (alpa_pos_map[ii] != port->pid) {
+ r_port = bfa_fcs_rport_create(port,
+ alpa_pos_map[ii]);
+ }
+ }
+ } else {
+ for (ii = 0; ii < MAX_ALPA_COUNT; ii++) {
+ /*
+ * ignore ALPA of bfa port
+ */
+ if ((port_loop_alpa_map[ii] > 0)
+ && (port_loop_alpa_map[ii] != port->pid))
+ bfa_fcs_port_loop_send_plogi(port,
+ port_loop_alpa_map[ii]);
+ /**TBD */
+ }
+ }
+ } else {
+ /*
+ * TBD Target Mode ??
+ */
+ }
+
+}
+
+/**
+ * Called by port to notify transition to offline state.
+ */
+void
+bfa_fcs_port_loop_offline(struct bfa_fcs_port_s *port)
+{
+
+}
+
+/**
+ * Called by port to notify a LIP on the loop.
+ */
+void
+bfa_fcs_port_loop_lip(struct bfa_fcs_port_s *port)
+{
+}
+
+/**
+ * Local Functions.
+ */
+bfa_status_t
+bfa_fcs_port_loop_send_plogi(struct bfa_fcs_port_s *port, u8 alpa)
+{
+ struct fchs_s fchs;
+ struct bfa_fcxp_s *fcxp = NULL;
+ int len;
+
+ bfa_trc(port->fcs, alpa);
+
+ fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
+ NULL);
+ bfa_assert(fcxp);
+
+ len = fc_plogi_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
+ bfa_fcs_port_get_fcid(port), 0,
+ port->port_cfg.pwwn, port->port_cfg.nwwn,
+ bfa_pport_get_maxfrsize(port->fcs->bfa));
+
+ bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
+ FC_CLASS_3, len, &fchs,
+ bfa_fcs_port_loop_plogi_response, (void *)port,
+ FC_MAX_PDUSZ, FC_RA_TOV);
+
+ return BFA_STATUS_OK;
+}
+
+/**
+ * Called by fcxp to notify the Plogi response
+ */
+void
+bfa_fcs_port_loop_plogi_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
+ void *cbarg, bfa_status_t req_status,
+ u32 rsp_len, u32 resid_len,
+ struct fchs_s *rsp_fchs)
+{
+ struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
+ struct fc_logi_s *plogi_resp;
+ struct fc_els_cmd_s *els_cmd;
+
+ bfa_trc(port->fcs, req_status);
+
+ /*
+ * Sanity Checks
+ */
+ if (req_status != BFA_STATUS_OK) {
+ bfa_trc(port->fcs, req_status);
+ /*
+ * @todo
+ * This could mean that the device with this APLA does not
+ * exist on the loop.
+ */
+
+ return;
+ }
+
+ els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
+ plogi_resp = (struct fc_logi_s *) els_cmd;
+
+ if (els_cmd->els_code == FC_ELS_ACC) {
+ bfa_fcs_rport_start(port, rsp_fchs, plogi_resp);
+ } else {
+ bfa_trc(port->fcs, plogi_resp->els_cmd.els_code);
+ bfa_assert(0);
+ }
+}
+
+bfa_status_t
+bfa_fcs_port_loop_send_plogi_acc(struct bfa_fcs_port_s *port, u8 alpa)
+{
+ struct fchs_s fchs;
+ struct bfa_fcxp_s *fcxp;
+ int len;
+
+ bfa_trc(port->fcs, alpa);
+
+ fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
+ NULL);
+ bfa_assert(fcxp);
+
+ len = fc_plogi_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
+ bfa_fcs_port_get_fcid(port), 0,
+ port->port_cfg.pwwn, port->port_cfg.nwwn,
+ bfa_pport_get_maxfrsize(port->fcs->bfa));
+
+ bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
+ FC_CLASS_3, len, &fchs,
+ bfa_fcs_port_loop_plogi_acc_response,
+ (void *)port, FC_MAX_PDUSZ, 0); /* No response
+ * expected
+ */
+
+ return BFA_STATUS_OK;
+}
+
+/*
+ * Plogi Acc Response
+ * We donot do any processing here.
+ */
+void
+bfa_fcs_port_loop_plogi_acc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
+ void *cbarg, bfa_status_t req_status,
+ u32 rsp_len, u32 resid_len,
+ struct fchs_s *rsp_fchs)
+{
+
+ struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
+
+ bfa_trc(port->fcs, port->pid);
+
+ /*
+ * Sanity Checks
+ */
+ if (req_status != BFA_STATUS_OK) {
+ bfa_trc(port->fcs, req_status);
+ return;
+ }
+}
+
+bfa_status_t
+bfa_fcs_port_loop_send_adisc(struct bfa_fcs_port_s *port, u8 alpa)
+{
+ struct fchs_s fchs;
+ struct bfa_fcxp_s *fcxp;
+ int len;
+
+ bfa_trc(port->fcs, alpa);
+
+ fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
+ NULL);
+ bfa_assert(fcxp);
+
+ len = fc_adisc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
+ bfa_fcs_port_get_fcid(port), 0,
+ port->port_cfg.pwwn, port->port_cfg.nwwn);
+
+ bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
+ FC_CLASS_3, len, &fchs,
+ bfa_fcs_port_loop_adisc_response, (void *)port,
+ FC_MAX_PDUSZ, FC_RA_TOV);
+
+ return BFA_STATUS_OK;
+}
+
+/**
+ * Called by fcxp to notify the ADISC response
+ */
+void
+bfa_fcs_port_loop_adisc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
+ void *cbarg, bfa_status_t req_status,
+ u32 rsp_len, u32 resid_len,
+ struct fchs_s *rsp_fchs)
+{
+ struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
+ struct bfa_fcs_rport_s *rport;
+ struct fc_adisc_s *adisc_resp;
+ struct fc_els_cmd_s *els_cmd;
+ u32 pid = rsp_fchs->s_id;
+
+ bfa_trc(port->fcs, req_status);
+
+ /*
+ * Sanity Checks
+ */
+ if (req_status != BFA_STATUS_OK) {
+ /*
+ * TBD : we may need to retry certain requests
+ */
+ bfa_fcxp_free(fcxp);
+ return;
+ }
+
+ els_cmd = (struct fc_els_cmd_s *) BFA_FCXP_RSP_PLD(fcxp);
+ adisc_resp = (struct fc_adisc_s *) els_cmd;
+
+ if (els_cmd->els_code == FC_ELS_ACC) {
+ } else {
+ bfa_trc(port->fcs, adisc_resp->els_cmd.els_code);
+
+ /*
+ * TBD: we may need to check for reject codes and retry
+ */
+ rport = bfa_fcs_port_get_rport_by_pid(port, pid);
+ if (rport) {
+ list_del(&rport->qe);
+ bfa_fcs_rport_delete(rport);
+ }
+
+ }
+ return;
+}
+
+bfa_status_t
+bfa_fcs_port_loop_send_adisc_acc(struct bfa_fcs_port_s *port, u8 alpa)
+{
+ struct fchs_s fchs;
+ struct bfa_fcxp_s *fcxp;
+ int len;
+
+ bfa_trc(port->fcs, alpa);
+
+ fcxp = bfa_fcxp_alloc(NULL, port->fcs->bfa, 0, 0, NULL, NULL, NULL,
+ NULL);
+ bfa_assert(fcxp);
+
+ len = fc_adisc_acc_build(&fchs, bfa_fcxp_get_reqbuf(fcxp), alpa,
+ bfa_fcs_port_get_fcid(port), 0,
+ port->port_cfg.pwwn, port->port_cfg.nwwn);
+
+ bfa_fcxp_send(fcxp, NULL, port->fabric->vf_id, port->lp_tag, BFA_FALSE,
+ FC_CLASS_3, len, &fchs,
+ bfa_fcs_port_loop_adisc_acc_response,
+ (void *)port, FC_MAX_PDUSZ, 0); /* no reponse
+ * expected
+ */
+
+ return BFA_STATUS_OK;
+}
+
+/*
+ * Adisc Acc Response
+ * We donot do any processing here.
+ */
+void
+bfa_fcs_port_loop_adisc_acc_response(void *fcsarg, struct bfa_fcxp_s *fcxp,
+ void *cbarg, bfa_status_t req_status,
+ u32 rsp_len, u32 resid_len,
+ struct fchs_s *rsp_fchs)
+{
+
+ struct bfa_fcs_port_s *port = (struct bfa_fcs_port_s *) cbarg;
+
+ bfa_trc(port->fcs, port->pid);
+
+ /*
+ * Sanity Checks
+ */
+ if (req_status != BFA_STATUS_OK) {
+ bfa_trc(port->fcs, req_status);
+ return;
+ }
+}
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