diff options
Diffstat (limited to 'kernel/drivers/scsi/bfa/bfa_hw_cb.c')
| -rw-r--r-- | kernel/drivers/scsi/bfa/bfa_hw_cb.c | 191 |
1 files changed, 191 insertions, 0 deletions
diff --git a/kernel/drivers/scsi/bfa/bfa_hw_cb.c b/kernel/drivers/scsi/bfa/bfa_hw_cb.c new file mode 100644 index 000000000..ea24d4c6e --- /dev/null +++ b/kernel/drivers/scsi/bfa/bfa_hw_cb.c @@ -0,0 +1,191 @@ +/* + * Copyright (c) 2005-2010 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 "bfad_drv.h" +#include "bfa_modules.h" +#include "bfi_reg.h" + +void +bfa_hwcb_reginit(struct bfa_s *bfa) +{ + struct bfa_iocfc_regs_s *bfa_regs = &bfa->iocfc.bfa_regs; + void __iomem *kva = bfa_ioc_bar0(&bfa->ioc); + int fn = bfa_ioc_pcifn(&bfa->ioc); + + if (fn == 0) { + bfa_regs->intr_status = (kva + HOSTFN0_INT_STATUS); + bfa_regs->intr_mask = (kva + HOSTFN0_INT_MSK); + } else { + bfa_regs->intr_status = (kva + HOSTFN1_INT_STATUS); + bfa_regs->intr_mask = (kva + HOSTFN1_INT_MSK); + } +} + +static void +bfa_hwcb_reqq_ack_msix(struct bfa_s *bfa, int reqq) +{ + writel(__HFN_INT_CPE_Q0 << CPE_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), reqq), + bfa->iocfc.bfa_regs.intr_status); +} + +/* + * Actions to respond RME Interrupt for Crossbow ASIC: + * - Write 1 to Interrupt Status register + * INTX - done in bfa_intx() + * MSIX - done in bfa_hwcb_rspq_ack_msix() + * - Update CI (only if new CI) + */ +static void +bfa_hwcb_rspq_ack_msix(struct bfa_s *bfa, int rspq, u32 ci) +{ + writel(__HFN_INT_RME_Q0 << RME_Q_NUM(bfa_ioc_pcifn(&bfa->ioc), rspq), + bfa->iocfc.bfa_regs.intr_status); + + if (bfa_rspq_ci(bfa, rspq) == ci) + return; + + bfa_rspq_ci(bfa, rspq) = ci; + writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]); + mmiowb(); +} + +void +bfa_hwcb_rspq_ack(struct bfa_s *bfa, int rspq, u32 ci) +{ + if (bfa_rspq_ci(bfa, rspq) == ci) + return; + + bfa_rspq_ci(bfa, rspq) = ci; + writel(ci, bfa->iocfc.bfa_regs.rme_q_ci[rspq]); + mmiowb(); +} + +void +bfa_hwcb_msix_getvecs(struct bfa_s *bfa, u32 *msix_vecs_bmap, + u32 *num_vecs, u32 *max_vec_bit) +{ +#define __HFN_NUMINTS 13 + if (bfa_ioc_pcifn(&bfa->ioc) == 0) { + *msix_vecs_bmap = (__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); + *max_vec_bit = __HFN_INT_MBOX_LPU0; + } else { + *msix_vecs_bmap = (__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); + *max_vec_bit = __HFN_INT_MBOX_LPU1; + } + + *msix_vecs_bmap |= (__HFN_INT_ERR_EMC | __HFN_INT_ERR_LPU0 | + __HFN_INT_ERR_LPU1 | __HFN_INT_ERR_PSS); + *num_vecs = __HFN_NUMINTS; +} + +/* + * Dummy interrupt handler for handling spurious interrupts. + */ +static void +bfa_hwcb_msix_dummy(struct bfa_s *bfa, int vec) +{ +} + +/* + * No special setup required for crossbow -- vector assignments are implicit. + */ +void +bfa_hwcb_msix_init(struct bfa_s *bfa, int nvecs) +{ + WARN_ON((nvecs != 1) && (nvecs != __HFN_NUMINTS)); + + bfa->msix.nvecs = nvecs; + bfa_hwcb_msix_uninstall(bfa); +} + +void +bfa_hwcb_msix_ctrl_install(struct bfa_s *bfa) +{ + int i; + + if (bfa->msix.nvecs == 0) + return; + + if (bfa->msix.nvecs == 1) { + for (i = BFI_MSIX_CPE_QMIN_CB; i < BFI_MSIX_CB_MAX; i++) + bfa->msix.handler[i] = bfa_msix_all; + return; + } + + for (i = BFI_MSIX_RME_QMAX_CB+1; i < BFI_MSIX_CB_MAX; i++) + bfa->msix.handler[i] = bfa_msix_lpu_err; +} + +void +bfa_hwcb_msix_queue_install(struct bfa_s *bfa) +{ + int i; + + if (bfa->msix.nvecs == 0) + return; + + if (bfa->msix.nvecs == 1) { + for (i = BFI_MSIX_CPE_QMIN_CB; i <= BFI_MSIX_RME_QMAX_CB; i++) + bfa->msix.handler[i] = bfa_msix_all; + return; + } + + for (i = BFI_MSIX_CPE_QMIN_CB; i <= BFI_MSIX_CPE_QMAX_CB; i++) + bfa->msix.handler[i] = bfa_msix_reqq; + + for (i = BFI_MSIX_RME_QMIN_CB; i <= BFI_MSIX_RME_QMAX_CB; i++) + bfa->msix.handler[i] = bfa_msix_rspq; +} + +void +bfa_hwcb_msix_uninstall(struct bfa_s *bfa) +{ + int i; + + for (i = 0; i < BFI_MSIX_CB_MAX; i++) + bfa->msix.handler[i] = bfa_hwcb_msix_dummy; +} + +/* + * No special enable/disable -- vector assignments are implicit. + */ +void +bfa_hwcb_isr_mode_set(struct bfa_s *bfa, bfa_boolean_t msix) +{ + if (msix) { + bfa->iocfc.hwif.hw_reqq_ack = bfa_hwcb_reqq_ack_msix; + bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack_msix; + } else { + bfa->iocfc.hwif.hw_reqq_ack = NULL; + bfa->iocfc.hwif.hw_rspq_ack = bfa_hwcb_rspq_ack; + } +} + +void +bfa_hwcb_msix_get_rme_range(struct bfa_s *bfa, u32 *start, u32 *end) +{ + *start = BFI_MSIX_RME_QMIN_CB; + *end = BFI_MSIX_RME_QMAX_CB; +} |