[SCSI] bfa: Brocade BFA FC SCSI driver

Add new driver for Brocade Hardware

Signed-off-by: Jing Huang <huangj@brocade.com>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>

1 files changed, 218 insertions, 0 deletions

diff --git a/drivers/scsi/bfa/bfa_intr.c b/drivers/scsi/bfa/bfa_intr.c
new file mode 100644
index 000000000000..0ca125712a04
--- /dev/null
+++ b/drivers/scsi/bfa/bfa_intr.c
@@ -0,0 +1,218 @@
+/*
+ * 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.
+ */
+#include <bfa.h>
+#include <bfi/bfi_cbreg.h>
+#include <bfa_port_priv.h>
+#include <bfa_intr_priv.h>
+#include <cs/bfa_debug.h>
+
+BFA_TRC_FILE(HAL, INTR);
+
+static void
+bfa_msix_errint(struct bfa_s *bfa, u32 intr)
+{
+        bfa_ioc_error_isr(&bfa->ioc);
+}
+
+static void
+bfa_msix_lpu(struct bfa_s *bfa)
+{
+        bfa_ioc_mbox_isr(&bfa->ioc);
+}
+
+void
+bfa_msix_all(struct bfa_s *bfa, int vec)
+{
+        bfa_intx(bfa);
+}
+
+/**
+ *  hal_intr_api
+ */
+bfa_boolean_t
+bfa_intx(struct bfa_s *bfa)
+{
+        u32        intr, qintr;
+        int             queue;
+
+        intr = bfa_reg_read(bfa->iocfc.bfa_regs.intr_status);
+        if (!intr)
+                return BFA_FALSE;
+
+        /**
+         * RME completion queue interrupt
+         */
+        qintr = intr & __HFN_INT_RME_MASK;
+        bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, qintr);
+
+        for (queue = 0; queue < BFI_IOC_MAX_CQS_ASIC; queue ++) {
+                if (intr & (__HFN_INT_RME_Q0 << queue))
+                        bfa_msix_rspq(bfa, queue & (BFI_IOC_MAX_CQS - 1));
+        }
+        intr &= ~qintr;
+        if (!intr)
+                return BFA_TRUE;
+
+        /**
+         * CPE completion queue interrupt
+         */
+        qintr = intr & __HFN_INT_CPE_MASK;
+        bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, qintr);
+
+        for (queue = 0; queue < BFI_IOC_MAX_CQS_ASIC; queue++) {
+                if (intr & (__HFN_INT_CPE_Q0 << queue))
+                        bfa_msix_reqq(bfa, queue & (BFI_IOC_MAX_CQS - 1));
+        }
+        intr &= ~qintr;
+        if (!intr)
+                return BFA_TRUE;
+
+        bfa_msix_lpu_err(bfa, intr);
+
+        return BFA_TRUE;
+}
+
+void
+bfa_isr_enable(struct bfa_s *bfa)
+{
+        u32        intr_unmask;
+        int             pci_func = bfa_ioc_pcifn(&bfa->ioc);
+
+        bfa_trc(bfa, pci_func);
+
+        bfa_msix_install(bfa);
+        intr_unmask = (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 |
+                       __HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS);
+
+        if (pci_func == 0)
+                intr_unmask |= (__HFN_INT_CPE_Q0 | __HFN_INT_CPE_Q1 |
+                                __HFN_INT_CPE_Q2 | __HFN_INT_CPE_Q3 |
+                                __HFN_INT_RME_Q0 | __HFN_INT_RME_Q1 |
+                                __HFN_INT_RME_Q2 | __HFN_INT_RME_Q3 |
+                                __HFN_INT_MBOX_LPU0);
+        else
+                intr_unmask |= (__HFN_INT_CPE_Q4 | __HFN_INT_CPE_Q5 |
+                                __HFN_INT_CPE_Q6 | __HFN_INT_CPE_Q7 |
+                                __HFN_INT_RME_Q4 | __HFN_INT_RME_Q5 |
+                                __HFN_INT_RME_Q6 | __HFN_INT_RME_Q7 |
+                                __HFN_INT_MBOX_LPU1);
+
+        bfa_reg_write(bfa->iocfc.bfa_regs.intr_status, intr_unmask);
+        bfa_reg_write(bfa->iocfc.bfa_regs.intr_mask, ~intr_unmask);
+        bfa_isr_mode_set(bfa, bfa->msix.nvecs != 0);
+}
+
+void
+bfa_isr_disable(struct bfa_s *bfa)
+{
+        bfa_isr_mode_set(bfa, BFA_FALSE);
+        bfa_reg_write(bfa->iocfc.bfa_regs.intr_mask, -1L);
+        bfa_msix_uninstall(bfa);
+}
+
+void
+bfa_msix_reqq(struct bfa_s *bfa, int qid)
+{
+        struct list_head                *waitq, *qe, *qen;
+        struct bfa_reqq_wait_s  *wqe;
+
+        qid &= (BFI_IOC_MAX_CQS - 1);
+
+        waitq = bfa_reqq(bfa, qid);
+        list_for_each_safe(qe, qen, waitq) {
+                /**
+                 * Callback only as long as there is room in request queue
+                 */
+                if (bfa_reqq_full(bfa, qid))
+                        break;
+
+                list_del(qe);
+                wqe = (struct bfa_reqq_wait_s *) qe;
+                wqe->qresume(wqe->cbarg);
+        }
+}
+
+void
+bfa_isr_unhandled(struct bfa_s *bfa, struct bfi_msg_s *m)
+{
+        bfa_trc(bfa, m->mhdr.msg_class);
+        bfa_trc(bfa, m->mhdr.msg_id);
+        bfa_trc(bfa, m->mhdr.mtag.i2htok);
+        bfa_assert(0);
+        bfa_trc_stop(bfa->trcmod);
+}
+
+void
+bfa_msix_rspq(struct bfa_s *bfa, int rsp_qid)
+{
+        struct bfi_msg_s      *m;
+        u32        pi, ci;
+
+        bfa_trc_fp(bfa, rsp_qid);
+
+        rsp_qid &= (BFI_IOC_MAX_CQS - 1);
+
+        bfa->iocfc.hwif.hw_rspq_ack(bfa, rsp_qid);
+
+        ci = bfa_rspq_ci(bfa, rsp_qid);
+        pi = bfa_rspq_pi(bfa, rsp_qid);
+
+        bfa_trc_fp(bfa, ci);
+        bfa_trc_fp(bfa, pi);
+
+        if (bfa->rme_process) {
+                while (ci != pi) {
+                        m = bfa_rspq_elem(bfa, rsp_qid, ci);
+                        bfa_assert_fp(m->mhdr.msg_class < BFI_MC_MAX);
+
+                        bfa_isrs[m->mhdr.msg_class] (bfa, m);
+
+                        CQ_INCR(ci, bfa->iocfc.cfg.drvcfg.num_rspq_elems);
+                }
+        }
+
+        /**
+         * update CI
+         */
+        bfa_rspq_ci(bfa, rsp_qid) = pi;
+        bfa_reg_write(bfa->iocfc.bfa_regs.rme_q_ci[rsp_qid], pi);
+        bfa_os_mmiowb();
+}
+
+void
+bfa_msix_lpu_err(struct bfa_s *bfa, int vec)
+{
+        u32 intr;
+
+        intr = bfa_reg_read(bfa->iocfc.bfa_regs.intr_status);
+
+        if (intr & (__HFN_INT_MBOX_LPU0 | __HFN_INT_MBOX_LPU1))
+                bfa_msix_lpu(bfa);
+
+        if (intr & (__HFN_INT_ERR_EMC |
+                    __HFN_INT_ERR_LPU0 | __HFN_INT_ERR_LPU1 |
+                    __HFN_INT_ERR_PSS))
+                bfa_msix_errint(bfa, intr);
+}
+
+void
+bfa_isr_bind(enum bfi_mclass mc, bfa_isr_func_t isr_func)
+{
+        bfa_isrs[mc] = isr_func;
+}
+
+