/* * Copyright (C) 2007 Michael Brown . * * Based in part upon the original driver by Mellanox Technologies * Ltd. Portions may be Copyright (c) Mellanox Technologies Ltd. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License as * published by the Free Software Foundation; either version 2 of the * License, or any later version. * * 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. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. * * You can also choose to distribute this program under the terms of * the Unmodified Binary Distribution Licence (as given in the file * COPYING.UBDL), provided that you have satisfied its requirements. */ FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL ); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "arbel.h" /** * @file * * Mellanox Arbel Infiniband HCA * */ /*************************************************************************** * * Queue number allocation * *************************************************************************** */ /** * Allocate offset within usage bitmask * * @v bits Usage bitmask * @v bits_len Length of usage bitmask * @ret bit First free bit within bitmask, or negative error */ static int arbel_bitmask_alloc ( arbel_bitmask_t *bits, unsigned int bits_len ) { unsigned int bit = 0; arbel_bitmask_t mask = 1; while ( bit < bits_len ) { if ( ( mask & *bits ) == 0 ) { *bits |= mask; return bit; } bit++; mask = ( mask << 1 ) | ( mask >> ( 8 * sizeof ( mask ) - 1 ) ); if ( mask == 1 ) bits++; } return -ENFILE; } /** * Free offset within usage bitmask * * @v bits Usage bitmask * @v bit Bit within bitmask */ static void arbel_bitmask_free ( arbel_bitmask_t *bits, int bit ) { arbel_bitmask_t mask; mask = ( 1 << ( bit % ( 8 * sizeof ( mask ) ) ) ); bits += ( bit / ( 8 * sizeof ( mask ) ) ); *bits &= ~mask; } /*************************************************************************** * * HCA commands * *************************************************************************** */ /** * Wait for Arbel command completion * * @v arbel Arbel device * @ret rc Return status code */ static int arbel_cmd_wait ( struct arbel *arbel, struct arbelprm_hca_command_register *hcr ) { unsigned int wait; for ( wait = ARBEL_HCR_MAX_WAIT_MS ; wait ; wait-- ) { hcr->u.dwords[6] = readl ( arbel->config + ARBEL_HCR_REG ( 6 ) ); if ( MLX_GET ( hcr, go ) == 0 ) return 0; mdelay ( 1 ); } return -EBUSY; } /** * Issue HCA command * * @v arbel Arbel device * @v command Command opcode, flags and input/output lengths * @v op_mod Opcode modifier (0 if no modifier applicable) * @v in Input parameters * @v in_mod Input modifier (0 if no modifier applicable) * @v out Output parameters * @ret rc Return status code */ static int arbel_cmd ( struct arbel *arbel, unsigned long command, unsigned int op_mod, const void *in, unsigned int in_mod, void *out ) { struct arbelprm_hca_command_register hcr; unsigned int opcode = ARBEL_HCR_OPCODE ( command ); size_t in_len = ARBEL_HCR_IN_LEN ( command ); size_t out_len = ARBEL_HCR_OUT_LEN ( command ); void *in_buffer; void *out_buffer; unsigned int status; unsigned int i; int rc; assert ( in_len <= ARBEL_MBOX_SIZE ); assert ( out_len <= ARBEL_MBOX_SIZE ); DBGC2 ( arbel, "Arbel %p command %02x in %zx%s out %zx%s\n", arbel, opcode, in_len, ( ( command & ARBEL_HCR_IN_MBOX ) ? "(mbox)" : "" ), out_len, ( ( command & ARBEL_HCR_OUT_MBOX ) ? "(mbox)" : "" ) ); /* Check that HCR is free */ if ( ( rc = arbel_cmd_wait ( arbel, &hcr ) ) != 0 ) { DBGC ( arbel, "Arbel %p command interface locked\n", arbel ); return rc; } /* Prepare HCR */ memset ( &hcr, 0, sizeof ( hcr ) ); in_buffer = &hcr.u.dwords[0]; if ( in_len && ( command & ARBEL_HCR_IN_MBOX ) ) { in_buffer = arbel->mailbox_in; MLX_FILL_H ( &hcr, 0, in_param_h, virt_to_bus ( in_buffer ) ); MLX_FILL_1 ( &hcr, 1, in_param_l, virt_to_bus ( in_buffer ) ); } memcpy ( in_buffer, in, in_len ); MLX_FILL_1 ( &hcr, 2, input_modifier, in_mod ); out_buffer = &hcr.u.dwords[3]; if ( out_len && ( command & ARBEL_HCR_OUT_MBOX ) ) { out_buffer = arbel->mailbox_out; MLX_FILL_H ( &hcr, 3, out_param_h, virt_to_bus ( out_buffer ) ); MLX_FILL_1 ( &hcr, 4, out_param_l, virt_to_bus ( out_buffer ) ); } MLX_FILL_3 ( &hcr, 6, opcode, opcode, opcode_modifier, op_mod, go, 1 ); DBGC ( arbel, "Arbel %p issuing command %04x\n", arbel, opcode ); DBGC2_HDA ( arbel, virt_to_phys ( arbel->config + ARBEL_HCR_BASE ), &hcr, sizeof ( hcr ) ); if ( in_len && ( command & ARBEL_HCR_IN_MBOX ) ) { DBGC2 ( arbel, "Input mailbox:\n" ); DBGC2_HDA ( arbel, virt_to_phys ( in_buffer ), in_buffer, ( ( in_len < 512 ) ? in_len : 512 ) ); } /* Issue command */ for ( i = 0 ; i < ( sizeof ( hcr ) / sizeof ( hcr.u.dwords[0] ) ) ; i++ ) { writel ( hcr.u.dwords[i], arbel->config + ARBEL_HCR_REG ( i ) ); barrier(); } /* Wait for command completion */ if ( ( rc = arbel_cmd_wait ( arbel, &hcr ) ) != 0 ) { DBGC ( arbel, "Arbel %p timed out waiting for command:\n", arbel ); DBGC_HD ( arbel, &hcr, sizeof ( hcr ) ); return rc; } /* Check command status */ status = MLX_GET ( &hcr, status ); if ( status != 0 ) { DBGC ( arbel, "Arbel %p command failed with status %02x:\n", arbel, status ); DBGC_HD ( arbel, &hcr, sizeof ( hcr ) ); return -EIO; } /* Read output parameters, if any */ hcr.u.dwords[3] = readl ( arbel->config + ARBEL_HCR_REG ( 3 ) ); hcr.u.dwords[4] = readl ( arbel->config + ARBEL_HCR_REG ( 4 ) ); memcpy ( out, out_buffer, out_len ); if ( out_len ) { DBGC2 ( arbel, "Output%s:\n", ( command & ARBEL_HCR_OUT_MBOX ) ? " mailbox" : "" ); DBGC2_HDA ( arbel, virt_to_phys ( out_buffer ), out_buffer, ( ( out_len < 512 ) ? out_len : 512 ) ); } return 0; } static inline int arbel_cmd_query_dev_lim ( struct arbel *arbel, struct arbelprm_query_dev_lim *dev_lim ) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_DEV_LIM, 1, sizeof ( *dev_lim ) ), 0, NULL, 0, dev_lim ); } static inline int arbel_cmd_query_fw ( struct arbel *arbel, struct arbelprm_query_fw *fw ) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_FW, 1, sizeof ( *fw ) ), 0, NULL, 0, fw ); } static inline int arbel_cmd_init_hca ( struct arbel *arbel, const struct arbelprm_init_hca *init_hca ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_INIT_HCA, 1, sizeof ( *init_hca ) ), 0, init_hca, 0, NULL ); } static inline int arbel_cmd_close_hca ( struct arbel *arbel ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_CLOSE_HCA ), 0, NULL, 0, NULL ); } static inline int arbel_cmd_init_ib ( struct arbel *arbel, unsigned int port, const struct arbelprm_init_ib *init_ib ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_INIT_IB, 1, sizeof ( *init_ib ) ), 0, init_ib, port, NULL ); } static inline int arbel_cmd_close_ib ( struct arbel *arbel, unsigned int port ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_CLOSE_IB ), 0, NULL, port, NULL ); } static inline int arbel_cmd_sw2hw_mpt ( struct arbel *arbel, unsigned int index, const struct arbelprm_mpt *mpt ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_SW2HW_MPT, 1, sizeof ( *mpt ) ), 0, mpt, index, NULL ); } static inline int arbel_cmd_map_eq ( struct arbel *arbel, unsigned long index_map, const struct arbelprm_event_mask *mask ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_EQ, 0, sizeof ( *mask ) ), 0, mask, index_map, NULL ); } static inline int arbel_cmd_sw2hw_eq ( struct arbel *arbel, unsigned int index, const struct arbelprm_eqc *eqctx ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_SW2HW_EQ, 1, sizeof ( *eqctx ) ), 0, eqctx, index, NULL ); } static inline int arbel_cmd_hw2sw_eq ( struct arbel *arbel, unsigned int index, struct arbelprm_eqc *eqctx ) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_HW2SW_EQ, 1, sizeof ( *eqctx ) ), 1, NULL, index, eqctx ); } static inline int arbel_cmd_sw2hw_cq ( struct arbel *arbel, unsigned long cqn, const struct arbelprm_completion_queue_context *cqctx ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_SW2HW_CQ, 1, sizeof ( *cqctx ) ), 0, cqctx, cqn, NULL ); } static inline int arbel_cmd_hw2sw_cq ( struct arbel *arbel, unsigned long cqn, struct arbelprm_completion_queue_context *cqctx) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_HW2SW_CQ, 1, sizeof ( *cqctx ) ), 0, NULL, cqn, cqctx ); } static inline int arbel_cmd_query_cq ( struct arbel *arbel, unsigned long cqn, struct arbelprm_completion_queue_context *cqctx ) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_CQ, 1, sizeof ( *cqctx ) ), 0, NULL, cqn, cqctx ); } static inline int arbel_cmd_rst2init_qpee ( struct arbel *arbel, unsigned long qpn, const struct arbelprm_qp_ee_state_transitions *ctx ){ return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_RST2INIT_QPEE, 1, sizeof ( *ctx ) ), 0, ctx, qpn, NULL ); } static inline int arbel_cmd_init2rtr_qpee ( struct arbel *arbel, unsigned long qpn, const struct arbelprm_qp_ee_state_transitions *ctx ){ return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_INIT2RTR_QPEE, 1, sizeof ( *ctx ) ), 0, ctx, qpn, NULL ); } static inline int arbel_cmd_rtr2rts_qpee ( struct arbel *arbel, unsigned long qpn, const struct arbelprm_qp_ee_state_transitions *ctx ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_RTR2RTS_QPEE, 1, sizeof ( *ctx ) ), 0, ctx, qpn, NULL ); } static inline int arbel_cmd_rts2rts_qpee ( struct arbel *arbel, unsigned long qpn, const struct arbelprm_qp_ee_state_transitions *ctx ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_RTS2RTS_QPEE, 1, sizeof ( *ctx ) ), 0, ctx, qpn, NULL ); } static inline int arbel_cmd_2rst_qpee ( struct arbel *arbel, unsigned long qpn ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_2RST_QPEE ), 0x03, NULL, qpn, NULL ); } static inline int arbel_cmd_query_qpee ( struct arbel *arbel, unsigned long qpn, struct arbelprm_qp_ee_state_transitions *ctx ) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_QUERY_QPEE, 1, sizeof ( *ctx ) ), 0, NULL, qpn, ctx ); } static inline int arbel_cmd_conf_special_qp ( struct arbel *arbel, unsigned int qp_type, unsigned long base_qpn ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_CONF_SPECIAL_QP ), qp_type, NULL, base_qpn, NULL ); } static inline int arbel_cmd_mad_ifc ( struct arbel *arbel, unsigned int port, union arbelprm_mad *mad ) { return arbel_cmd ( arbel, ARBEL_HCR_INOUT_CMD ( ARBEL_HCR_MAD_IFC, 1, sizeof ( *mad ), 1, sizeof ( *mad ) ), 0x03, mad, port, mad ); } static inline int arbel_cmd_read_mgm ( struct arbel *arbel, unsigned int index, struct arbelprm_mgm_entry *mgm ) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_READ_MGM, 1, sizeof ( *mgm ) ), 0, NULL, index, mgm ); } static inline int arbel_cmd_write_mgm ( struct arbel *arbel, unsigned int index, const struct arbelprm_mgm_entry *mgm ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_WRITE_MGM, 1, sizeof ( *mgm ) ), 0, mgm, index, NULL ); } static inline int arbel_cmd_mgid_hash ( struct arbel *arbel, const union ib_gid *gid, struct arbelprm_mgm_hash *hash ) { return arbel_cmd ( arbel, ARBEL_HCR_INOUT_CMD ( ARBEL_HCR_MGID_HASH, 1, sizeof ( *gid ), 0, sizeof ( *hash ) ), 0, gid, 0, hash ); } static inline int arbel_cmd_run_fw ( struct arbel *arbel ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_RUN_FW ), 0, NULL, 0, NULL ); } static inline int arbel_cmd_disable_lam ( struct arbel *arbel ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_DISABLE_LAM ), 0, NULL, 0, NULL ); } static inline int arbel_cmd_enable_lam ( struct arbel *arbel, struct arbelprm_access_lam *lam ) { return arbel_cmd ( arbel, ARBEL_HCR_OUT_CMD ( ARBEL_HCR_ENABLE_LAM, 1, sizeof ( *lam ) ), 1, NULL, 0, lam ); } static inline int arbel_cmd_unmap_icm ( struct arbel *arbel, unsigned int page_count, const struct arbelprm_scalar_parameter *offset ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_UNMAP_ICM, 0, sizeof ( *offset ) ), 0, offset, page_count, NULL ); } static inline int arbel_cmd_map_icm ( struct arbel *arbel, const struct arbelprm_virtual_physical_mapping *map ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_ICM, 1, sizeof ( *map ) ), 0, map, 1, NULL ); } static inline int arbel_cmd_unmap_icm_aux ( struct arbel *arbel ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_UNMAP_ICM_AUX ), 0, NULL, 0, NULL ); } static inline int arbel_cmd_map_icm_aux ( struct arbel *arbel, const struct arbelprm_virtual_physical_mapping *map ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_ICM_AUX, 1, sizeof ( *map ) ), 0, map, 1, NULL ); } static inline int arbel_cmd_set_icm_size ( struct arbel *arbel, const struct arbelprm_scalar_parameter *icm_size, struct arbelprm_scalar_parameter *icm_aux_size ) { return arbel_cmd ( arbel, ARBEL_HCR_INOUT_CMD ( ARBEL_HCR_SET_ICM_SIZE, 0, sizeof ( *icm_size ), 0, sizeof ( *icm_aux_size ) ), 0, icm_size, 0, icm_aux_size ); } static inline int arbel_cmd_unmap_fa ( struct arbel *arbel ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_UNMAP_FA ), 0, NULL, 0, NULL ); } static inline int arbel_cmd_map_fa ( struct arbel *arbel, const struct arbelprm_virtual_physical_mapping *map ) { return arbel_cmd ( arbel, ARBEL_HCR_IN_CMD ( ARBEL_HCR_MAP_FA, 1, sizeof ( *map ) ), 0, map, 1, NULL ); } /*************************************************************************** * * MAD operations * *************************************************************************** */ /** * Issue management datagram * * @v ibdev Infiniband device * @v mad Management datagram * @ret rc Return status code */ static int arbel_mad ( struct ib_device *ibdev, union ib_mad *mad ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); union arbelprm_mad mad_ifc; int rc; linker_assert ( sizeof ( *mad ) == sizeof ( mad_ifc.mad ), mad_size_mismatch ); /* Copy in request packet */ memcpy ( &mad_ifc.mad, mad, sizeof ( mad_ifc.mad ) ); /* Issue MAD */ if ( ( rc = arbel_cmd_mad_ifc ( arbel, ibdev->port, &mad_ifc ) ) != 0 ) { DBGC ( arbel, "Arbel %p port %d could not issue MAD IFC: %s\n", arbel, ibdev->port, strerror ( rc ) ); return rc; } /* Copy out reply packet */ memcpy ( mad, &mad_ifc.mad, sizeof ( *mad ) ); if ( mad->hdr.status != 0 ) { DBGC ( arbel, "Arbel %p port %d MAD IFC status %04x\n", arbel, ibdev->port, ntohs ( mad->hdr.status ) ); return -EIO; } return 0; } /*************************************************************************** * * Completion queue operations * *************************************************************************** */ /** * Dump completion queue context (for debugging only) * * @v arbel Arbel device * @v cq Completion queue * @ret rc Return status code */ static __attribute__ (( unused )) int arbel_dump_cqctx ( struct arbel *arbel, struct ib_completion_queue *cq ) { struct arbelprm_completion_queue_context cqctx; int rc; memset ( &cqctx, 0, sizeof ( cqctx ) ); if ( ( rc = arbel_cmd_query_cq ( arbel, cq->cqn, &cqctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p CQN %#lx QUERY_CQ failed: %s\n", arbel, cq->cqn, strerror ( rc ) ); return rc; } DBGC ( arbel, "Arbel %p CQN %#lx context:\n", arbel, cq->cqn ); DBGC_HDA ( arbel, 0, &cqctx, sizeof ( cqctx ) ); return 0; } /** * Create completion queue * * @v ibdev Infiniband device * @v cq Completion queue * @ret rc Return status code */ static int arbel_create_cq ( struct ib_device *ibdev, struct ib_completion_queue *cq ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_completion_queue *arbel_cq; struct arbelprm_completion_queue_context cqctx; struct arbelprm_cq_ci_db_record *ci_db_rec; struct arbelprm_cq_arm_db_record *arm_db_rec; int cqn_offset; unsigned int i; int rc; /* Find a free completion queue number */ cqn_offset = arbel_bitmask_alloc ( arbel->cq_inuse, ARBEL_MAX_CQS ); if ( cqn_offset < 0 ) { DBGC ( arbel, "Arbel %p out of completion queues\n", arbel ); rc = cqn_offset; goto err_cqn_offset; } cq->cqn = ( arbel->limits.reserved_cqs + cqn_offset ); /* Allocate control structures */ arbel_cq = zalloc ( sizeof ( *arbel_cq ) ); if ( ! arbel_cq ) { rc = -ENOMEM; goto err_arbel_cq; } arbel_cq->ci_doorbell_idx = arbel_cq_ci_doorbell_idx ( arbel, cq ); arbel_cq->arm_doorbell_idx = arbel_cq_arm_doorbell_idx ( arbel, cq ); /* Allocate completion queue itself */ arbel_cq->cqe_size = ( cq->num_cqes * sizeof ( arbel_cq->cqe[0] ) ); arbel_cq->cqe = malloc_dma ( arbel_cq->cqe_size, sizeof ( arbel_cq->cqe[0] ) ); if ( ! arbel_cq->cqe ) { rc = -ENOMEM; goto err_cqe; } memset ( arbel_cq->cqe, 0, arbel_cq->cqe_size ); for ( i = 0 ; i < cq->num_cqes ; i++ ) { MLX_FILL_1 ( &arbel_cq->cqe[i].normal, 7, owner, 1 ); } barrier(); /* Initialise doorbell records */ ci_db_rec = &arbel->db_rec[arbel_cq->ci_doorbell_idx].cq_ci; MLX_FILL_1 ( ci_db_rec, 0, counter, 0 ); MLX_FILL_2 ( ci_db_rec, 1, res, ARBEL_UAR_RES_CQ_CI, cq_number, cq->cqn ); arm_db_rec = &arbel->db_rec[arbel_cq->arm_doorbell_idx].cq_arm; MLX_FILL_1 ( arm_db_rec, 0, counter, 0 ); MLX_FILL_2 ( arm_db_rec, 1, res, ARBEL_UAR_RES_CQ_ARM, cq_number, cq->cqn ); /* Hand queue over to hardware */ memset ( &cqctx, 0, sizeof ( cqctx ) ); MLX_FILL_1 ( &cqctx, 0, st, 0xa /* "Event fired" */ ); MLX_FILL_H ( &cqctx, 1, start_address_h, virt_to_bus ( arbel_cq->cqe ) ); MLX_FILL_1 ( &cqctx, 2, start_address_l, virt_to_bus ( arbel_cq->cqe ) ); MLX_FILL_2 ( &cqctx, 3, usr_page, arbel->limits.reserved_uars, log_cq_size, fls ( cq->num_cqes - 1 ) ); MLX_FILL_1 ( &cqctx, 5, c_eqn, arbel->eq.eqn ); MLX_FILL_1 ( &cqctx, 6, pd, ARBEL_GLOBAL_PD ); MLX_FILL_1 ( &cqctx, 7, l_key, arbel->lkey ); MLX_FILL_1 ( &cqctx, 12, cqn, cq->cqn ); MLX_FILL_1 ( &cqctx, 13, cq_ci_db_record, arbel_cq->ci_doorbell_idx ); MLX_FILL_1 ( &cqctx, 14, cq_state_db_record, arbel_cq->arm_doorbell_idx ); if ( ( rc = arbel_cmd_sw2hw_cq ( arbel, cq->cqn, &cqctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p CQN %#lx SW2HW_CQ failed: %s\n", arbel, cq->cqn, strerror ( rc ) ); goto err_sw2hw_cq; } DBGC ( arbel, "Arbel %p CQN %#lx ring [%08lx,%08lx), doorbell %08lx\n", arbel, cq->cqn, virt_to_phys ( arbel_cq->cqe ), ( virt_to_phys ( arbel_cq->cqe ) + arbel_cq->cqe_size ), virt_to_phys ( ci_db_rec ) ); ib_cq_set_drvdata ( cq, arbel_cq ); return 0; err_sw2hw_cq: MLX_FILL_1 ( ci_db_rec, 1, res, ARBEL_UAR_RES_NONE ); MLX_FILL_1 ( arm_db_rec, 1, res, ARBEL_UAR_RES_NONE ); free_dma ( arbel_cq->cqe, arbel_cq->cqe_size ); err_cqe: free ( arbel_cq ); err_arbel_cq: arbel_bitmask_free ( arbel->cq_inuse, cqn_offset ); err_cqn_offset: return rc; } /** * Destroy completion queue * * @v ibdev Infiniband device * @v cq Completion queue */ static void arbel_destroy_cq ( struct ib_device *ibdev, struct ib_completion_queue *cq ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_completion_queue *arbel_cq = ib_cq_get_drvdata ( cq ); struct arbelprm_completion_queue_context cqctx; struct arbelprm_cq_ci_db_record *ci_db_rec; struct arbelprm_cq_arm_db_record *arm_db_rec; int cqn_offset; int rc; /* Take ownership back from hardware */ if ( ( rc = arbel_cmd_hw2sw_cq ( arbel, cq->cqn, &cqctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p CQN %#lx FATAL HW2SW_CQ failed: " "%s\n", arbel, cq->cqn, strerror ( rc ) ); /* Leak memory and return; at least we avoid corruption */ return; } /* Clear doorbell records */ ci_db_rec = &arbel->db_rec[arbel_cq->ci_doorbell_idx].cq_ci; arm_db_rec = &arbel->db_rec[arbel_cq->arm_doorbell_idx].cq_arm; MLX_FILL_1 ( ci_db_rec, 1, res, ARBEL_UAR_RES_NONE ); MLX_FILL_1 ( arm_db_rec, 1, res, ARBEL_UAR_RES_NONE ); /* Free memory */ free_dma ( arbel_cq->cqe, arbel_cq->cqe_size ); free ( arbel_cq ); /* Mark queue number as free */ cqn_offset = ( cq->cqn - arbel->limits.reserved_cqs ); arbel_bitmask_free ( arbel->cq_inuse, cqn_offset ); ib_cq_set_drvdata ( cq, NULL ); } /*************************************************************************** * * Queue pair operations * *************************************************************************** */ /** * Assign queue pair number * * @v ibdev Infiniband device * @v qp Queue pair * @ret rc Return status code */ static int arbel_alloc_qpn ( struct ib_device *ibdev, struct ib_queue_pair *qp ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); unsigned int port_offset; int qpn_offset; /* Calculate queue pair number */ port_offset = ( ibdev->port - ARBEL_PORT_BASE ); switch ( qp->type ) { case IB_QPT_SMI: qp->qpn = ( arbel->special_qpn_base + port_offset ); return 0; case IB_QPT_GSI: qp->qpn = ( arbel->special_qpn_base + 2 + port_offset ); return 0; case IB_QPT_UD: case IB_QPT_RC: /* Find a free queue pair number */ qpn_offset = arbel_bitmask_alloc ( arbel->qp_inuse, ARBEL_MAX_QPS ); if ( qpn_offset < 0 ) { DBGC ( arbel, "Arbel %p out of queue pairs\n", arbel ); return qpn_offset; } qp->qpn = ( ( random() & ARBEL_QPN_RANDOM_MASK ) | ( arbel->qpn_base + qpn_offset ) ); return 0; default: DBGC ( arbel, "Arbel %p unsupported QP type %d\n", arbel, qp->type ); return -ENOTSUP; } } /** * Free queue pair number * * @v ibdev Infiniband device * @v qp Queue pair */ static void arbel_free_qpn ( struct ib_device *ibdev, struct ib_queue_pair *qp ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); int qpn_offset; qpn_offset = ( ( qp->qpn & ~ARBEL_QPN_RANDOM_MASK ) - arbel->qpn_base ); if ( qpn_offset >= 0 ) arbel_bitmask_free ( arbel->qp_inuse, qpn_offset ); } /** * Calculate transmission rate * * @v av Address vector * @ret arbel_rate Arbel rate */ static unsigned int arbel_rate ( struct ib_address_vector *av ) { return ( ( ( av->rate >= IB_RATE_2_5 ) && ( av->rate <= IB_RATE_120 ) ) ? ( av->rate + 5 ) : 0 ); } /** Queue pair transport service type map */ static uint8_t arbel_qp_st[] = { [IB_QPT_SMI] = ARBEL_ST_MLX, [IB_QPT_GSI] = ARBEL_ST_MLX, [IB_QPT_UD] = ARBEL_ST_UD, [IB_QPT_RC] = ARBEL_ST_RC, }; /** * Dump queue pair context (for debugging only) * * @v arbel Arbel device * @v qp Queue pair * @ret rc Return status code */ static __attribute__ (( unused )) int arbel_dump_qpctx ( struct arbel *arbel, struct ib_queue_pair *qp ) { struct arbelprm_qp_ee_state_transitions qpctx; int rc; memset ( &qpctx, 0, sizeof ( qpctx ) ); if ( ( rc = arbel_cmd_query_qpee ( arbel, qp->qpn, &qpctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p QPN %#lx QUERY_QPEE failed: %s\n", arbel, qp->qpn, strerror ( rc ) ); return rc; } DBGC ( arbel, "Arbel %p QPN %#lx context:\n", arbel, qp->qpn ); DBGC_HDA ( arbel, 0, &qpctx.u.dwords[2], ( sizeof ( qpctx ) - 8 ) ); return 0; } /** * Create send work queue * * @v arbel_send_wq Send work queue * @v num_wqes Number of work queue entries * @ret rc Return status code */ static int arbel_create_send_wq ( struct arbel_send_work_queue *arbel_send_wq, unsigned int num_wqes ) { union arbel_send_wqe *wqe; union arbel_send_wqe *next_wqe; unsigned int wqe_idx_mask; unsigned int i; /* Allocate work queue */ arbel_send_wq->wqe_size = ( num_wqes * sizeof ( arbel_send_wq->wqe[0] ) ); arbel_send_wq->wqe = malloc_dma ( arbel_send_wq->wqe_size, sizeof ( arbel_send_wq->wqe[0] ) ); if ( ! arbel_send_wq->wqe ) return -ENOMEM; memset ( arbel_send_wq->wqe, 0, arbel_send_wq->wqe_size ); /* Link work queue entries */ wqe_idx_mask = ( num_wqes - 1 ); for ( i = 0 ; i < num_wqes ; i++ ) { wqe = &arbel_send_wq->wqe[i]; next_wqe = &arbel_send_wq->wqe[ ( i + 1 ) & wqe_idx_mask ]; MLX_FILL_1 ( &wqe->next, 0, nda_31_6, ( virt_to_bus ( next_wqe ) >> 6 ) ); MLX_FILL_1 ( &wqe->next, 1, always1, 1 ); } return 0; } /** * Create receive work queue * * @v arbel_recv_wq Receive work queue * @v num_wqes Number of work queue entries * @ret rc Return status code */ static int arbel_create_recv_wq ( struct arbel_recv_work_queue *arbel_recv_wq, unsigned int num_wqes ) { struct arbelprm_recv_wqe *wqe; struct arbelprm_recv_wqe *next_wqe; unsigned int wqe_idx_mask; size_t nds; unsigned int i; unsigned int j; /* Allocate work queue */ arbel_recv_wq->wqe_size = ( num_wqes * sizeof ( arbel_recv_wq->wqe[0] ) ); arbel_recv_wq->wqe = malloc_dma ( arbel_recv_wq->wqe_size, sizeof ( arbel_recv_wq->wqe[0] ) ); if ( ! arbel_recv_wq->wqe ) return -ENOMEM; memset ( arbel_recv_wq->wqe, 0, arbel_recv_wq->wqe_size ); /* Link work queue entries */ wqe_idx_mask = ( num_wqes - 1 ); nds = ( ( offsetof ( typeof ( *wqe ), data ) + sizeof ( wqe->data[0] ) ) >> 4 ); for ( i = 0 ; i < num_wqes ; i++ ) { wqe = &arbel_recv_wq->wqe[i].recv; next_wqe = &arbel_recv_wq->wqe[( i + 1 ) & wqe_idx_mask].recv; MLX_FILL_1 ( &wqe->next, 0, nda_31_6, ( virt_to_bus ( next_wqe ) >> 6 ) ); MLX_FILL_1 ( &wqe->next, 1, nds, nds ); for ( j = 0 ; ( ( ( void * ) &wqe->data[j] ) < ( ( void * ) ( wqe + 1 ) ) ) ; j++ ) { MLX_FILL_1 ( &wqe->data[j], 1, l_key, ARBEL_INVALID_LKEY ); } } return 0; } /** * Create queue pair * * @v ibdev Infiniband device * @v qp Queue pair * @ret rc Return status code */ static int arbel_create_qp ( struct ib_device *ibdev, struct ib_queue_pair *qp ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_queue_pair *arbel_qp; struct arbelprm_qp_ee_state_transitions qpctx; struct arbelprm_qp_db_record *send_db_rec; struct arbelprm_qp_db_record *recv_db_rec; physaddr_t send_wqe_base_adr; physaddr_t recv_wqe_base_adr; physaddr_t wqe_base_adr; int rc; /* Warn about dysfunctional code * * Arbel seems to crash the system as soon as the first send * WQE completes on an RC queue pair. (NOPs complete * successfully, so this is a problem specific to the work * queue rather than the completion queue.) The cause of this * problem has remained unknown for over a year. Patches to * fix this are welcome. */ if ( qp->type == IB_QPT_RC ) DBG ( "*** WARNING: Arbel RC support is non-functional ***\n" ); /* Calculate queue pair number */ if ( ( rc = arbel_alloc_qpn ( ibdev, qp ) ) != 0 ) goto err_alloc_qpn; /* Allocate control structures */ arbel_qp = zalloc ( sizeof ( *arbel_qp ) ); if ( ! arbel_qp ) { rc = -ENOMEM; goto err_arbel_qp; } arbel_qp->send.doorbell_idx = arbel_send_doorbell_idx ( arbel, qp ); arbel_qp->recv.doorbell_idx = arbel_recv_doorbell_idx ( arbel, qp ); /* Create send and receive work queues */ if ( ( rc = arbel_create_send_wq ( &arbel_qp->send, qp->send.num_wqes ) ) != 0 ) goto err_create_send_wq; if ( ( rc = arbel_create_recv_wq ( &arbel_qp->recv, qp->recv.num_wqes ) ) != 0 ) goto err_create_recv_wq; /* Send and receive work queue entries must be within the same 4GB */ send_wqe_base_adr = virt_to_bus ( arbel_qp->send.wqe ); recv_wqe_base_adr = virt_to_bus ( arbel_qp->recv.wqe ); if ( ( sizeof ( physaddr_t ) > sizeof ( uint32_t ) ) && ( ( ( ( uint64_t ) send_wqe_base_adr ) >> 32 ) != ( ( ( uint64_t ) recv_wqe_base_adr ) >> 32 ) ) ) { DBGC ( arbel, "Arbel %p QPN %#lx cannot support send %08lx " "recv %08lx\n", arbel, qp->qpn, send_wqe_base_adr, recv_wqe_base_adr ); rc = -ENOTSUP; goto err_unsupported_address_split; } wqe_base_adr = send_wqe_base_adr; /* Initialise doorbell records */ send_db_rec = &arbel->db_rec[arbel_qp->send.doorbell_idx].qp; MLX_FILL_1 ( send_db_rec, 0, counter, 0 ); MLX_FILL_2 ( send_db_rec, 1, res, ARBEL_UAR_RES_SQ, qp_number, qp->qpn ); recv_db_rec = &arbel->db_rec[arbel_qp->recv.doorbell_idx].qp; MLX_FILL_1 ( recv_db_rec, 0, counter, 0 ); MLX_FILL_2 ( recv_db_rec, 1, res, ARBEL_UAR_RES_RQ, qp_number, qp->qpn ); /* Transition queue to INIT state */ memset ( &qpctx, 0, sizeof ( qpctx ) ); MLX_FILL_3 ( &qpctx, 2, qpc_eec_data.de, 1, qpc_eec_data.pm_state, ARBEL_PM_STATE_MIGRATED, qpc_eec_data.st, arbel_qp_st[qp->type] ); MLX_FILL_4 ( &qpctx, 4, qpc_eec_data.log_rq_size, fls ( qp->recv.num_wqes - 1 ), qpc_eec_data.log_rq_stride, ( fls ( sizeof ( arbel_qp->recv.wqe[0] ) - 1 ) - 4 ), qpc_eec_data.log_sq_size, fls ( qp->send.num_wqes - 1 ), qpc_eec_data.log_sq_stride, ( fls ( sizeof ( arbel_qp->send.wqe[0] ) - 1 ) - 4 ) ); MLX_FILL_1 ( &qpctx, 5, qpc_eec_data.usr_page, arbel->limits.reserved_uars ); MLX_FILL_1 ( &qpctx, 10, qpc_eec_data.primary_address_path.port_number, ibdev->port ); MLX_FILL_1 ( &qpctx, 27, qpc_eec_data.pd, ARBEL_GLOBAL_PD ); MLX_FILL_H ( &qpctx, 28, qpc_eec_data.wqe_base_adr_h, wqe_base_adr ); MLX_FILL_1 ( &qpctx, 29, qpc_eec_data.wqe_lkey, arbel->lkey ); MLX_FILL_1 ( &qpctx, 30, qpc_eec_data.ssc, 1 ); MLX_FILL_1 ( &qpctx, 33, qpc_eec_data.cqn_snd, qp->send.cq->cqn ); MLX_FILL_1 ( &qpctx, 34, qpc_eec_data.snd_wqe_base_adr_l, ( send_wqe_base_adr >> 6 ) ); MLX_FILL_1 ( &qpctx, 35, qpc_eec_data.snd_db_record_index, arbel_qp->send.doorbell_idx ); MLX_FILL_4 ( &qpctx, 38, qpc_eec_data.rre, 1, qpc_eec_data.rwe, 1, qpc_eec_data.rae, 1, qpc_eec_data.rsc, 1 ); MLX_FILL_1 ( &qpctx, 41, qpc_eec_data.cqn_rcv, qp->recv.cq->cqn ); MLX_FILL_1 ( &qpctx, 42, qpc_eec_data.rcv_wqe_base_adr_l, ( recv_wqe_base_adr >> 6 ) ); MLX_FILL_1 ( &qpctx, 43, qpc_eec_data.rcv_db_record_index, arbel_qp->recv.doorbell_idx ); if ( ( rc = arbel_cmd_rst2init_qpee ( arbel, qp->qpn, &qpctx )) != 0 ){ DBGC ( arbel, "Arbel %p QPN %#lx RST2INIT_QPEE failed: %s\n", arbel, qp->qpn, strerror ( rc ) ); goto err_rst2init_qpee; } arbel_qp->state = ARBEL_QP_ST_INIT; DBGC ( arbel, "Arbel %p QPN %#lx send ring [%08lx,%08lx), doorbell " "%08lx\n", arbel, qp->qpn, virt_to_phys ( arbel_qp->send.wqe ), ( virt_to_phys ( arbel_qp->send.wqe ) + arbel_qp->send.wqe_size ), virt_to_phys ( send_db_rec ) ); DBGC ( arbel, "Arbel %p QPN %#lx receive ring [%08lx,%08lx), doorbell " "%08lx\n", arbel, qp->qpn, virt_to_phys ( arbel_qp->recv.wqe ), ( virt_to_phys ( arbel_qp->recv.wqe ) + arbel_qp->recv.wqe_size ), virt_to_phys ( recv_db_rec ) ); DBGC ( arbel, "Arbel %p QPN %#lx send CQN %#lx receive CQN %#lx\n", arbel, qp->qpn, qp->send.cq->cqn, qp->recv.cq->cqn ); ib_qp_set_drvdata ( qp, arbel_qp ); return 0; arbel_cmd_2rst_qpee ( arbel, qp->qpn ); err_rst2init_qpee: MLX_FILL_1 ( send_db_rec, 1, res, ARBEL_UAR_RES_NONE ); MLX_FILL_1 ( recv_db_rec, 1, res, ARBEL_UAR_RES_NONE ); err_unsupported_address_split: free_dma ( arbel_qp->recv.wqe, arbel_qp->recv.wqe_size ); err_create_recv_wq: free_dma ( arbel_qp->send.wqe, arbel_qp->send.wqe_size ); err_create_send_wq: free ( arbel_qp ); err_arbel_qp: arbel_free_qpn ( ibdev, qp ); err_alloc_qpn: return rc; } /** * Modify queue pair * * @v ibdev Infiniband device * @v qp Queue pair * @ret rc Return status code */ static int arbel_modify_qp ( struct ib_device *ibdev, struct ib_queue_pair *qp ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp ); struct arbelprm_qp_ee_state_transitions qpctx; int rc; /* Transition queue to RTR state, if applicable */ if ( arbel_qp->state < ARBEL_QP_ST_RTR ) { memset ( &qpctx, 0, sizeof ( qpctx ) ); MLX_FILL_2 ( &qpctx, 4, qpc_eec_data.mtu, ARBEL_MTU_2048, qpc_eec_data.msg_max, 31 ); MLX_FILL_1 ( &qpctx, 7, qpc_eec_data.remote_qpn_een, qp->av.qpn ); MLX_FILL_2 ( &qpctx, 11, qpc_eec_data.primary_address_path.rnr_retry, ARBEL_RETRY_MAX, qpc_eec_data.primary_address_path.rlid, qp->av.lid ); MLX_FILL_2 ( &qpctx, 12, qpc_eec_data.primary_address_path.ack_timeout, 14 /* 4.096us * 2^(14) = 67ms */, qpc_eec_data.primary_address_path.max_stat_rate, arbel_rate ( &qp->av ) ); memcpy ( &qpctx.u.dwords[14], &qp->av.gid, sizeof ( qp->av.gid ) ); MLX_FILL_1 ( &qpctx, 30, qpc_eec_data.retry_count, ARBEL_RETRY_MAX ); MLX_FILL_1 ( &qpctx, 39, qpc_eec_data.next_rcv_psn, qp->recv.psn ); MLX_FILL_1 ( &qpctx, 40, qpc_eec_data.ra_buff_indx, ( arbel->limits.reserved_rdbs + ( ( qp->qpn & ~ARBEL_QPN_RANDOM_MASK ) - arbel->special_qpn_base ) ) ); if ( ( rc = arbel_cmd_init2rtr_qpee ( arbel, qp->qpn, &qpctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p QPN %#lx INIT2RTR_QPEE failed:" " %s\n", arbel, qp->qpn, strerror ( rc ) ); return rc; } arbel_qp->state = ARBEL_QP_ST_RTR; } /* Transition queue to RTS state, if applicable */ if ( arbel_qp->state < ARBEL_QP_ST_RTS ) { memset ( &qpctx, 0, sizeof ( qpctx ) ); MLX_FILL_1 ( &qpctx, 11, qpc_eec_data.primary_address_path.rnr_retry, ARBEL_RETRY_MAX ); MLX_FILL_1 ( &qpctx, 12, qpc_eec_data.primary_address_path.ack_timeout, 14 /* 4.096us * 2^(14) = 67ms */ ); MLX_FILL_2 ( &qpctx, 30, qpc_eec_data.retry_count, ARBEL_RETRY_MAX, qpc_eec_data.sic, 1 ); MLX_FILL_1 ( &qpctx, 32, qpc_eec_data.next_send_psn, qp->send.psn ); if ( ( rc = arbel_cmd_rtr2rts_qpee ( arbel, qp->qpn, &qpctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p QPN %#lx RTR2RTS_QPEE failed: " "%s\n", arbel, qp->qpn, strerror ( rc ) ); return rc; } arbel_qp->state = ARBEL_QP_ST_RTS; } /* Update parameters in RTS state */ memset ( &qpctx, 0, sizeof ( qpctx ) ); MLX_FILL_1 ( &qpctx, 0, opt_param_mask, ARBEL_QPEE_OPT_PARAM_QKEY ); MLX_FILL_1 ( &qpctx, 44, qpc_eec_data.q_key, qp->qkey ); if ( ( rc = arbel_cmd_rts2rts_qpee ( arbel, qp->qpn, &qpctx ) ) != 0 ){ DBGC ( arbel, "Arbel %p QPN %#lx RTS2RTS_QPEE failed: %s\n", arbel, qp->qpn, strerror ( rc ) ); return rc; } return 0; } /** * Destroy queue pair * * @v ibdev Infiniband device * @v qp Queue pair */ static void arbel_destroy_qp ( struct ib_device *ibdev, struct ib_queue_pair *qp ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp ); struct arbelprm_qp_db_record *send_db_rec; struct arbelprm_qp_db_record *recv_db_rec; int rc; /* Take ownership back from hardware */ if ( ( rc = arbel_cmd_2rst_qpee ( arbel, qp->qpn ) ) != 0 ) { DBGC ( arbel, "Arbel %p QPN %#lx FATAL 2RST_QPEE failed: " "%s\n", arbel, qp->qpn, strerror ( rc ) ); /* Leak memory and return; at least we avoid corruption */ return; } /* Clear doorbell records */ send_db_rec = &arbel->db_rec[arbel_qp->send.doorbell_idx].qp; recv_db_rec = &arbel->db_rec[arbel_qp->recv.doorbell_idx].qp; MLX_FILL_1 ( send_db_rec, 1, res, ARBEL_UAR_RES_NONE ); MLX_FILL_1 ( recv_db_rec, 1, res, ARBEL_UAR_RES_NONE ); /* Free memory */ free_dma ( arbel_qp->send.wqe, arbel_qp->send.wqe_size ); free_dma ( arbel_qp->recv.wqe, arbel_qp->recv.wqe_size ); free ( arbel_qp ); /* Mark queue number as free */ arbel_free_qpn ( ibdev, qp ); ib_qp_set_drvdata ( qp, NULL ); } /*************************************************************************** * * Work request operations * *************************************************************************** */ /** * Ring doorbell register in UAR * * @v arbel Arbel device * @v db_reg Doorbell register structure * @v offset Address of doorbell */ static void arbel_ring_doorbell ( struct arbel *arbel, union arbelprm_doorbell_register *db_reg, unsigned int offset ) { DBGC2 ( arbel, "Arbel %p ringing doorbell %08x:%08x at %lx\n", arbel, ntohl ( db_reg->dword[0] ), ntohl ( db_reg->dword[1] ), virt_to_phys ( arbel->uar + offset ) ); barrier(); writel ( db_reg->dword[0], ( arbel->uar + offset + 0 ) ); barrier(); writel ( db_reg->dword[1], ( arbel->uar + offset + 4 ) ); } /** GID used for GID-less send work queue entries */ static const union ib_gid arbel_no_gid = { .bytes = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 }, }; /** * Construct UD send work queue entry * * @v ibdev Infiniband device * @v qp Queue pair * @v dest Destination address vector * @v iobuf I/O buffer * @v wqe Send work queue entry * @ret nds Work queue entry size */ static size_t arbel_fill_ud_send_wqe ( struct ib_device *ibdev, struct ib_queue_pair *qp __unused, struct ib_address_vector *dest, struct io_buffer *iobuf, union arbel_send_wqe *wqe ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); const union ib_gid *gid; /* Construct this work queue entry */ MLX_FILL_1 ( &wqe->ud.ctrl, 0, always1, 1 ); MLX_FILL_2 ( &wqe->ud.ud, 0, ud_address_vector.pd, ARBEL_GLOBAL_PD, ud_address_vector.port_number, ibdev->port ); MLX_FILL_2 ( &wqe->ud.ud, 1, ud_address_vector.rlid, dest->lid, ud_address_vector.g, dest->gid_present ); MLX_FILL_2 ( &wqe->ud.ud, 2, ud_address_vector.max_stat_rate, arbel_rate ( dest ), ud_address_vector.msg, 3 ); MLX_FILL_1 ( &wqe->ud.ud, 3, ud_address_vector.sl, dest->sl ); gid = ( dest->gid_present ? &dest->gid : &arbel_no_gid ); memcpy ( &wqe->ud.ud.u.dwords[4], gid, sizeof ( *gid ) ); MLX_FILL_1 ( &wqe->ud.ud, 8, destination_qp, dest->qpn ); MLX_FILL_1 ( &wqe->ud.ud, 9, q_key, dest->qkey ); MLX_FILL_1 ( &wqe->ud.data[0], 0, byte_count, iob_len ( iobuf ) ); MLX_FILL_1 ( &wqe->ud.data[0], 1, l_key, arbel->lkey ); MLX_FILL_H ( &wqe->ud.data[0], 2, local_address_h, virt_to_bus ( iobuf->data ) ); MLX_FILL_1 ( &wqe->ud.data[0], 3, local_address_l, virt_to_bus ( iobuf->data ) ); return ( offsetof ( typeof ( wqe->ud ), data[1] ) >> 4 ); } /** * Construct MLX send work queue entry * * @v ibdev Infiniband device * @v qp Queue pair * @v dest Destination address vector * @v iobuf I/O buffer * @v wqe Send work queue entry * @ret nds Work queue entry size */ static size_t arbel_fill_mlx_send_wqe ( struct ib_device *ibdev, struct ib_queue_pair *qp, struct ib_address_vector *dest, struct io_buffer *iobuf, union arbel_send_wqe *wqe ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct io_buffer headers; /* Construct IB headers */ iob_populate ( &headers, &wqe->mlx.headers, 0, sizeof ( wqe->mlx.headers ) ); iob_reserve ( &headers, sizeof ( wqe->mlx.headers ) ); ib_push ( ibdev, &headers, qp, iob_len ( iobuf ), dest ); /* Construct this work queue entry */ MLX_FILL_5 ( &wqe->mlx.ctrl, 0, c, 1 /* generate completion */, icrc, 0 /* generate ICRC */, max_statrate, arbel_rate ( dest ), slr, 0, v15, ( ( qp->ext_qpn == IB_QPN_SMI ) ? 1 : 0 ) ); MLX_FILL_1 ( &wqe->mlx.ctrl, 1, rlid, dest->lid ); MLX_FILL_1 ( &wqe->mlx.data[0], 0, byte_count, iob_len ( &headers ) ); MLX_FILL_1 ( &wqe->mlx.data[0], 1, l_key, arbel->lkey ); MLX_FILL_H ( &wqe->mlx.data[0], 2, local_address_h, virt_to_bus ( headers.data ) ); MLX_FILL_1 ( &wqe->mlx.data[0], 3, local_address_l, virt_to_bus ( headers.data ) ); MLX_FILL_1 ( &wqe->mlx.data[1], 0, byte_count, ( iob_len ( iobuf ) + 4 /* ICRC */ ) ); MLX_FILL_1 ( &wqe->mlx.data[1], 1, l_key, arbel->lkey ); MLX_FILL_H ( &wqe->mlx.data[1], 2, local_address_h, virt_to_bus ( iobuf->data ) ); MLX_FILL_1 ( &wqe->mlx.data[1], 3, local_address_l, virt_to_bus ( iobuf->data ) ); return ( offsetof ( typeof ( wqe->mlx ), data[2] ) >> 4 ); } /** * Construct RC send work queue entry * * @v ibdev Infiniband device * @v qp Queue pair * @v dest Destination address vector * @v iobuf I/O buffer * @v wqe Send work queue entry * @ret nds Work queue entry size */ static size_t arbel_fill_rc_send_wqe ( struct ib_device *ibdev, struct ib_queue_pair *qp __unused, struct ib_address_vector *dest __unused, struct io_buffer *iobuf, union arbel_send_wqe *wqe ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); /* Construct this work queue entry */ MLX_FILL_1 ( &wqe->rc.ctrl, 0, always1, 1 ); MLX_FILL_1 ( &wqe->rc.data[0], 0, byte_count, iob_len ( iobuf ) ); MLX_FILL_1 ( &wqe->rc.data[0], 1, l_key, arbel->lkey ); MLX_FILL_H ( &wqe->rc.data[0], 2, local_address_h, virt_to_bus ( iobuf->data ) ); MLX_FILL_1 ( &wqe->rc.data[0], 3, local_address_l, virt_to_bus ( iobuf->data ) ); return ( offsetof ( typeof ( wqe->rc ), data[1] ) >> 4 ); } /** Work queue entry constructors */ static size_t ( * arbel_fill_send_wqe[] ) ( struct ib_device *ibdev, struct ib_queue_pair *qp, struct ib_address_vector *dest, struct io_buffer *iobuf, union arbel_send_wqe *wqe ) = { [IB_QPT_SMI] = arbel_fill_mlx_send_wqe, [IB_QPT_GSI] = arbel_fill_mlx_send_wqe, [IB_QPT_UD] = arbel_fill_ud_send_wqe, [IB_QPT_RC] = arbel_fill_rc_send_wqe, }; /** * Post send work queue entry * * @v ibdev Infiniband device * @v qp Queue pair * @v dest Destination address vector * @v iobuf I/O buffer * @ret rc Return status code */ static int arbel_post_send ( struct ib_device *ibdev, struct ib_queue_pair *qp, struct ib_address_vector *dest, struct io_buffer *iobuf ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp ); struct ib_work_queue *wq = &qp->send; struct arbel_send_work_queue *arbel_send_wq = &arbel_qp->send; union arbel_send_wqe *prev_wqe; union arbel_send_wqe *wqe; struct arbelprm_qp_db_record *qp_db_rec; union arbelprm_doorbell_register db_reg; unsigned long wqe_idx_mask; size_t nds; /* Allocate work queue entry */ wqe_idx_mask = ( wq->num_wqes - 1 ); if ( wq->iobufs[wq->next_idx & wqe_idx_mask] ) { DBGC ( arbel, "Arbel %p QPN %#lx send queue full", arbel, qp->qpn ); return -ENOBUFS; } wq->iobufs[wq->next_idx & wqe_idx_mask] = iobuf; prev_wqe = &arbel_send_wq->wqe[(wq->next_idx - 1) & wqe_idx_mask]; wqe = &arbel_send_wq->wqe[wq->next_idx & wqe_idx_mask]; /* Construct work queue entry */ memset ( ( ( ( void * ) wqe ) + sizeof ( wqe->next ) ), 0, ( sizeof ( *wqe ) - sizeof ( wqe->next ) ) ); assert ( qp->type < ( sizeof ( arbel_fill_send_wqe ) / sizeof ( arbel_fill_send_wqe[0] ) ) ); assert ( arbel_fill_send_wqe[qp->type] != NULL ); nds = arbel_fill_send_wqe[qp->type] ( ibdev, qp, dest, iobuf, wqe ); DBGCP ( arbel, "Arbel %p QPN %#lx posting send WQE %#lx:\n", arbel, qp->qpn, ( wq->next_idx & wqe_idx_mask ) ); DBGCP_HDA ( arbel, virt_to_phys ( wqe ), wqe, sizeof ( *wqe ) ); /* Update previous work queue entry's "next" field */ MLX_SET ( &prev_wqe->next, nopcode, ARBEL_OPCODE_SEND ); MLX_FILL_3 ( &prev_wqe->next, 1, nds, nds, f, 0, always1, 1 ); /* Update doorbell record */ barrier(); qp_db_rec = &arbel->db_rec[arbel_send_wq->doorbell_idx].qp; MLX_FILL_1 ( qp_db_rec, 0, counter, ( ( wq->next_idx + 1 ) & 0xffff ) ); /* Ring doorbell register */ MLX_FILL_4 ( &db_reg.send, 0, nopcode, ARBEL_OPCODE_SEND, f, 0, wqe_counter, ( wq->next_idx & 0xffff ), wqe_cnt, 1 ); MLX_FILL_2 ( &db_reg.send, 1, nds, nds, qpn, qp->qpn ); arbel_ring_doorbell ( arbel, &db_reg, ARBEL_DB_POST_SND_OFFSET ); /* Update work queue's index */ wq->next_idx++; return 0; } /** * Post receive work queue entry * * @v ibdev Infiniband device * @v qp Queue pair * @v iobuf I/O buffer * @ret rc Return status code */ static int arbel_post_recv ( struct ib_device *ibdev, struct ib_queue_pair *qp, struct io_buffer *iobuf ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_queue_pair *arbel_qp = ib_qp_get_drvdata ( qp ); struct ib_work_queue *wq = &qp->recv; struct arbel_recv_work_queue *arbel_recv_wq = &arbel_qp->recv; struct arbelprm_recv_wqe *wqe; union arbelprm_doorbell_record *db_rec; unsigned int wqe_idx_mask; /* Allocate work queue entry */ wqe_idx_mask = ( wq->num_wqes - 1 ); if ( wq->iobufs[wq->next_idx & wqe_idx_mask] ) { DBGC ( arbel, "Arbel %p QPN %#lx receive queue full\n", arbel, qp->qpn ); return -ENOBUFS; } wq->iobufs[wq->next_idx & wqe_idx_mask] = iobuf; wqe = &arbel_recv_wq->wqe[wq->next_idx & wqe_idx_mask].recv; /* Construct work queue entry */ MLX_FILL_1 ( &wqe->data[0], 0, byte_count, iob_tailroom ( iobuf ) ); MLX_FILL_1 ( &wqe->data[0], 1, l_key, arbel->lkey ); MLX_FILL_H ( &wqe->data[0], 2, local_address_h, virt_to_bus ( iobuf->data ) ); MLX_FILL_1 ( &wqe->data[0], 3, local_address_l, virt_to_bus ( iobuf->data ) ); /* Update doorbell record */ barrier(); db_rec = &arbel->db_rec[arbel_recv_wq->doorbell_idx]; MLX_FILL_1 ( &db_rec->qp, 0, counter, ( ( wq->next_idx + 1 ) & 0xffff ) ); /* Update work queue's index */ wq->next_idx++; return 0; } /** * Handle completion * * @v ibdev Infiniband device * @v cq Completion queue * @v cqe Hardware completion queue entry * @ret rc Return status code */ static int arbel_complete ( struct ib_device *ibdev, struct ib_completion_queue *cq, union arbelprm_completion_entry *cqe ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct ib_work_queue *wq; struct ib_queue_pair *qp; struct arbel_queue_pair *arbel_qp; struct arbel_send_work_queue *arbel_send_wq; struct arbel_recv_work_queue *arbel_recv_wq; struct arbelprm_recv_wqe *recv_wqe; struct io_buffer *iobuf; struct ib_address_vector recv_dest; struct ib_address_vector recv_source; struct ib_global_route_header *grh; struct ib_address_vector *source; unsigned int opcode; unsigned long qpn; int is_send; unsigned long wqe_adr; unsigned long wqe_idx; size_t len; int rc = 0; /* Parse completion */ qpn = MLX_GET ( &cqe->normal, my_qpn ); is_send = MLX_GET ( &cqe->normal, s ); wqe_adr = ( MLX_GET ( &cqe->normal, wqe_adr ) << 6 ); opcode = MLX_GET ( &cqe->normal, opcode ); if ( opcode >= ARBEL_OPCODE_RECV_ERROR ) { /* "s" field is not valid for error opcodes */ is_send = ( opcode == ARBEL_OPCODE_SEND_ERROR ); DBGC ( arbel, "Arbel %p CQN %#lx %s QPN %#lx syndrome %#x " "vendor %#x\n", arbel, cq->cqn, ( is_send ? "send" : "recv" ), qpn, MLX_GET ( &cqe->error, syndrome ), MLX_GET ( &cqe->error, vendor_code ) ); DBGC_HDA ( arbel, virt_to_phys ( cqe ), cqe, sizeof ( *cqe ) ); rc = -EIO; /* Don't return immediately; propagate error to completer */ } /* Identify work queue */ wq = ib_find_wq ( cq, qpn, is_send ); if ( ! wq ) { DBGC ( arbel, "Arbel %p CQN %#lx unknown %s QPN %#lx\n", arbel, cq->cqn, ( is_send ? "send" : "recv" ), qpn ); return -EIO; } qp = wq->qp; arbel_qp = ib_qp_get_drvdata ( qp ); arbel_send_wq = &arbel_qp->send; arbel_recv_wq = &arbel_qp->recv; /* Identify work queue entry index */ if ( is_send ) { wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_send_wq->wqe ) ) / sizeof ( arbel_send_wq->wqe[0] ) ); assert ( wqe_idx < qp->send.num_wqes ); } else { wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_recv_wq->wqe ) ) / sizeof ( arbel_recv_wq->wqe[0] ) ); assert ( wqe_idx < qp->recv.num_wqes ); } DBGCP ( arbel, "Arbel %p CQN %#lx QPN %#lx %s WQE %#lx completed:\n", arbel, cq->cqn, qp->qpn, ( is_send ? "send" : "recv" ), wqe_idx ); DBGCP_HDA ( arbel, virt_to_phys ( cqe ), cqe, sizeof ( *cqe ) ); /* Identify I/O buffer */ iobuf = wq->iobufs[wqe_idx]; if ( ! iobuf ) { DBGC ( arbel, "Arbel %p CQN %#lx QPN %#lx empty %s WQE %#lx\n", arbel, cq->cqn, qp->qpn, ( is_send ? "send" : "recv" ), wqe_idx ); return -EIO; } wq->iobufs[wqe_idx] = NULL; if ( is_send ) { /* Hand off to completion handler */ ib_complete_send ( ibdev, qp, iobuf, rc ); } else { /* Set received length */ len = MLX_GET ( &cqe->normal, byte_cnt ); recv_wqe = &arbel_recv_wq->wqe[wqe_idx].recv; assert ( MLX_GET ( &recv_wqe->data[0], local_address_l ) == virt_to_bus ( iobuf->data ) ); assert ( MLX_GET ( &recv_wqe->data[0], byte_count ) == iob_tailroom ( iobuf ) ); MLX_FILL_1 ( &recv_wqe->data[0], 0, byte_count, 0 ); MLX_FILL_1 ( &recv_wqe->data[0], 1, l_key, ARBEL_INVALID_LKEY ); assert ( len <= iob_tailroom ( iobuf ) ); iob_put ( iobuf, len ); memset ( &recv_dest, 0, sizeof ( recv_dest ) ); recv_dest.qpn = qpn; switch ( qp->type ) { case IB_QPT_SMI: case IB_QPT_GSI: case IB_QPT_UD: assert ( iob_len ( iobuf ) >= sizeof ( *grh ) ); grh = iobuf->data; iob_pull ( iobuf, sizeof ( *grh ) ); /* Construct address vector */ source = &recv_source; memset ( source, 0, sizeof ( *source ) ); source->qpn = MLX_GET ( &cqe->normal, rqpn ); source->lid = MLX_GET ( &cqe->normal, rlid ); source->sl = MLX_GET ( &cqe->normal, sl ); recv_dest.gid_present = source->gid_present = MLX_GET ( &cqe->normal, g ); memcpy ( &recv_dest.gid, &grh->dgid, sizeof ( recv_dest.gid ) ); memcpy ( &source->gid, &grh->sgid, sizeof ( source->gid ) ); break; case IB_QPT_RC: source = &qp->av; break; default: assert ( 0 ); return -EINVAL; } /* Hand off to completion handler */ ib_complete_recv ( ibdev, qp, &recv_dest, source, iobuf, rc ); } return rc; } /** * Poll completion queue * * @v ibdev Infiniband device * @v cq Completion queue */ static void arbel_poll_cq ( struct ib_device *ibdev, struct ib_completion_queue *cq ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_completion_queue *arbel_cq = ib_cq_get_drvdata ( cq ); struct arbelprm_cq_ci_db_record *ci_db_rec; union arbelprm_completion_entry *cqe; unsigned int cqe_idx_mask; int rc; while ( 1 ) { /* Look for completion entry */ cqe_idx_mask = ( cq->num_cqes - 1 ); cqe = &arbel_cq->cqe[cq->next_idx & cqe_idx_mask]; if ( MLX_GET ( &cqe->normal, owner ) != 0 ) { /* Entry still owned by hardware; end of poll */ break; } /* Handle completion */ if ( ( rc = arbel_complete ( ibdev, cq, cqe ) ) != 0 ) { DBGC ( arbel, "Arbel %p CQN %#lx failed to complete: " "%s\n", arbel, cq->cqn, strerror ( rc ) ); DBGC_HD ( arbel, cqe, sizeof ( *cqe ) ); } /* Return ownership to hardware */ MLX_FILL_1 ( &cqe->normal, 7, owner, 1 ); barrier(); /* Update completion queue's index */ cq->next_idx++; /* Update doorbell record */ ci_db_rec = &arbel->db_rec[arbel_cq->ci_doorbell_idx].cq_ci; MLX_FILL_1 ( ci_db_rec, 0, counter, ( cq->next_idx & 0xffffffffUL ) ); } } /*************************************************************************** * * Event queues * *************************************************************************** */ /** * Create event queue * * @v arbel Arbel device * @ret rc Return status code */ static int arbel_create_eq ( struct arbel *arbel ) { struct arbel_event_queue *arbel_eq = &arbel->eq; struct arbelprm_eqc eqctx; struct arbelprm_event_mask mask; unsigned int i; int rc; /* Select event queue number */ arbel_eq->eqn = arbel->limits.reserved_eqs; /* Calculate doorbell address */ arbel_eq->doorbell = ( arbel->eq_ci_doorbells + ARBEL_DB_EQ_OFFSET ( arbel_eq->eqn ) ); /* Allocate event queue itself */ arbel_eq->eqe_size = ( ARBEL_NUM_EQES * sizeof ( arbel_eq->eqe[0] ) ); arbel_eq->eqe = malloc_dma ( arbel_eq->eqe_size, sizeof ( arbel_eq->eqe[0] ) ); if ( ! arbel_eq->eqe ) { rc = -ENOMEM; goto err_eqe; } memset ( arbel_eq->eqe, 0, arbel_eq->eqe_size ); for ( i = 0 ; i < ARBEL_NUM_EQES ; i++ ) { MLX_FILL_1 ( &arbel_eq->eqe[i].generic, 7, owner, 1 ); } barrier(); /* Hand queue over to hardware */ memset ( &eqctx, 0, sizeof ( eqctx ) ); MLX_FILL_1 ( &eqctx, 0, st, 0xa /* "Fired" */ ); MLX_FILL_H ( &eqctx, 1, start_address_h, virt_to_phys ( arbel_eq->eqe ) ); MLX_FILL_1 ( &eqctx, 2, start_address_l, virt_to_phys ( arbel_eq->eqe ) ); MLX_FILL_1 ( &eqctx, 3, log_eq_size, fls ( ARBEL_NUM_EQES - 1 ) ); MLX_FILL_1 ( &eqctx, 6, pd, ARBEL_GLOBAL_PD ); MLX_FILL_1 ( &eqctx, 7, lkey, arbel->lkey ); if ( ( rc = arbel_cmd_sw2hw_eq ( arbel, arbel_eq->eqn, &eqctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p EQN %#lx SW2HW_EQ failed: %s\n", arbel, arbel_eq->eqn, strerror ( rc ) ); goto err_sw2hw_eq; } /* Map events to this event queue */ memset ( &mask, 0xff, sizeof ( mask ) ); if ( ( rc = arbel_cmd_map_eq ( arbel, ( ARBEL_MAP_EQ | arbel_eq->eqn ), &mask ) ) != 0 ) { DBGC ( arbel, "Arbel %p EQN %#lx MAP_EQ failed: %s\n", arbel, arbel_eq->eqn, strerror ( rc ) ); goto err_map_eq; } DBGC ( arbel, "Arbel %p EQN %#lx ring [%08lx,%08lx), doorbell %08lx\n", arbel, arbel_eq->eqn, virt_to_phys ( arbel_eq->eqe ), ( virt_to_phys ( arbel_eq->eqe ) + arbel_eq->eqe_size ), virt_to_phys ( arbel_eq->doorbell ) ); return 0; err_map_eq: arbel_cmd_hw2sw_eq ( arbel, arbel_eq->eqn, &eqctx ); err_sw2hw_eq: free_dma ( arbel_eq->eqe, arbel_eq->eqe_size ); err_eqe: memset ( arbel_eq, 0, sizeof ( *arbel_eq ) ); return rc; } /** * Destroy event queue * * @v arbel Arbel device */ static void arbel_destroy_eq ( struct arbel *arbel ) { struct arbel_event_queue *arbel_eq = &arbel->eq; struct arbelprm_eqc eqctx; struct arbelprm_event_mask mask; int rc; /* Unmap events from event queue */ memset ( &mask, 0, sizeof ( mask ) ); MLX_FILL_1 ( &mask, 1, port_state_change, 1 ); if ( ( rc = arbel_cmd_map_eq ( arbel, ( ARBEL_UNMAP_EQ | arbel_eq->eqn ), &mask ) ) != 0 ) { DBGC ( arbel, "Arbel %p EQN %#lx FATAL MAP_EQ failed to " "unmap: %s\n", arbel, arbel_eq->eqn, strerror ( rc ) ); /* Continue; HCA may die but system should survive */ } /* Take ownership back from hardware */ if ( ( rc = arbel_cmd_hw2sw_eq ( arbel, arbel_eq->eqn, &eqctx ) ) != 0 ) { DBGC ( arbel, "Arbel %p EQN %#lx FATAL HW2SW_EQ failed: %s\n", arbel, arbel_eq->eqn, strerror ( rc ) ); /* Leak memory and return; at least we avoid corruption */ return; } /* Free memory */ free_dma ( arbel_eq->eqe, arbel_eq->eqe_size ); memset ( arbel_eq, 0, sizeof ( *arbel_eq ) ); } /** * Handle port state event * * @v arbel Arbel device * @v eqe Port state change event queue entry */ static void arbel_event_port_state_change ( struct arbel *arbel, union arbelprm_event_entry *eqe){ unsigned int port; int link_up; /* Get port and link status */ port = ( MLX_GET ( &eqe->port_state_change, data.p ) - 1 ); link_up = ( MLX_GET ( &eqe->generic, event_sub_type ) & 0x04 ); DBGC ( arbel, "Arbel %p port %d link %s\n", arbel, ( port + 1 ), ( link_up ? "up" : "down" ) ); /* Sanity check */ if ( port >= ARBEL_NUM_PORTS ) { DBGC ( arbel, "Arbel %p port %d does not exist!\n", arbel, ( port + 1 ) ); return; } /* Update MAD parameters */ ib_smc_update ( arbel->ibdev[port], arbel_mad ); } /** * Poll event queue * * @v ibdev Infiniband device */ static void arbel_poll_eq ( struct ib_device *ibdev ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbel_event_queue *arbel_eq = &arbel->eq; union arbelprm_event_entry *eqe; union arbelprm_eq_doorbell_register db_reg; unsigned int eqe_idx_mask; unsigned int event_type; /* No event is generated upon reaching INIT, so we must poll * separately for link state changes while we remain DOWN. */ if ( ib_is_open ( ibdev ) && ( ibdev->port_state == IB_PORT_STATE_DOWN ) ) { ib_smc_update ( ibdev, arbel_mad ); } /* Poll event queue */ while ( 1 ) { /* Look for event entry */ eqe_idx_mask = ( ARBEL_NUM_EQES - 1 ); eqe = &arbel_eq->eqe[arbel_eq->next_idx & eqe_idx_mask]; if ( MLX_GET ( &eqe->generic, owner ) != 0 ) { /* Entry still owned by hardware; end of poll */ break; } DBGCP ( arbel, "Arbel %p EQN %#lx event:\n", arbel, arbel_eq->eqn ); DBGCP_HDA ( arbel, virt_to_phys ( eqe ), eqe, sizeof ( *eqe ) ); /* Handle event */ event_type = MLX_GET ( &eqe->generic, event_type ); switch ( event_type ) { case ARBEL_EV_PORT_STATE_CHANGE: arbel_event_port_state_change ( arbel, eqe ); break; default: DBGC ( arbel, "Arbel %p EQN %#lx unrecognised event " "type %#x:\n", arbel, arbel_eq->eqn, event_type ); DBGC_HDA ( arbel, virt_to_phys ( eqe ), eqe, sizeof ( *eqe ) ); break; } /* Return ownership to hardware */ MLX_FILL_1 ( &eqe->generic, 7, owner, 1 ); barrier(); /* Update event queue's index */ arbel_eq->next_idx++; /* Ring doorbell */ MLX_FILL_1 ( &db_reg.ci, 0, ci, arbel_eq->next_idx ); writel ( db_reg.dword[0], arbel_eq->doorbell ); } } /*************************************************************************** * * Firmware control * *************************************************************************** */ /** * Map virtual to physical address for firmware usage * * @v arbel Arbel device * @v map Mapping function * @v va Virtual address * @v pa Physical address * @v len Length of region * @ret rc Return status code */ static int arbel_map_vpm ( struct arbel *arbel, int ( *map ) ( struct arbel *arbel, const struct arbelprm_virtual_physical_mapping* ), uint64_t va, physaddr_t pa, size_t len ) { struct arbelprm_virtual_physical_mapping mapping; physaddr_t start; physaddr_t low; physaddr_t high; physaddr_t end; size_t size; int rc; /* Sanity checks */ assert ( ( va & ( ARBEL_PAGE_SIZE - 1 ) ) == 0 ); assert ( ( pa & ( ARBEL_PAGE_SIZE - 1 ) ) == 0 ); assert ( ( len & ( ARBEL_PAGE_SIZE - 1 ) ) == 0 ); /* Calculate starting points */ start = pa; end = ( start + len ); size = ( 1UL << ( fls ( start ^ end ) - 1 ) ); low = high = ( end & ~( size - 1 ) ); assert ( start < low ); assert ( high <= end ); /* These mappings tend to generate huge volumes of * uninteresting debug data, which basically makes it * impossible to use debugging otherwise. */ DBG_DISABLE ( DBGLVL_LOG | DBGLVL_EXTRA ); /* Map blocks in descending order of size */ while ( size >= ARBEL_PAGE_SIZE ) { /* Find the next candidate block */ if ( ( low - size ) >= start ) { low -= size; pa = low; } else if ( ( high + size ) <= end ) { pa = high; high += size; } else { size >>= 1; continue; } assert ( ( va & ( size - 1 ) ) == 0 ); assert ( ( pa & ( size - 1 ) ) == 0 ); /* Map this block */ memset ( &mapping, 0, sizeof ( mapping ) ); MLX_FILL_1 ( &mapping, 0, va_h, ( va >> 32 ) ); MLX_FILL_1 ( &mapping, 1, va_l, ( va >> 12 ) ); MLX_FILL_H ( &mapping, 2, pa_h, pa ); MLX_FILL_2 ( &mapping, 3, log2size, ( ( fls ( size ) - 1 ) - 12 ), pa_l, ( pa >> 12 ) ); if ( ( rc = map ( arbel, &mapping ) ) != 0 ) { DBG_ENABLE ( DBGLVL_LOG | DBGLVL_EXTRA ); DBGC ( arbel, "Arbel %p could not map %08llx+%zx to " "%08lx: %s\n", arbel, va, size, pa, strerror ( rc ) ); return rc; } va += size; } assert ( low == start ); assert ( high == end ); DBG_ENABLE ( DBGLVL_LOG | DBGLVL_EXTRA ); return 0; } /** * Start firmware running * * @v arbel Arbel device * @ret rc Return status code */ static int arbel_start_firmware ( struct arbel *arbel ) { struct arbelprm_query_fw fw; struct arbelprm_access_lam lam; unsigned int fw_pages; size_t fw_len; physaddr_t fw_base; uint64_t eq_set_ci_base_addr; int rc; /* Get firmware parameters */ if ( ( rc = arbel_cmd_query_fw ( arbel, &fw ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not query firmware: %s\n", arbel, strerror ( rc ) ); goto err_query_fw; } DBGC ( arbel, "Arbel %p firmware version %d.%d.%d\n", arbel, MLX_GET ( &fw, fw_rev_major ), MLX_GET ( &fw, fw_rev_minor ), MLX_GET ( &fw, fw_rev_subminor ) ); fw_pages = MLX_GET ( &fw, fw_pages ); DBGC ( arbel, "Arbel %p requires %d kB for firmware\n", arbel, ( fw_pages * 4 ) ); eq_set_ci_base_addr = ( ( (uint64_t) MLX_GET ( &fw, eq_set_ci_base_addr_h ) << 32 ) | ( (uint64_t) MLX_GET ( &fw, eq_set_ci_base_addr_l ) ) ); arbel->eq_ci_doorbells = ioremap ( eq_set_ci_base_addr, 0x200 ); /* Enable locally-attached memory. Ignore failure; there may * be no attached memory. */ arbel_cmd_enable_lam ( arbel, &lam ); /* Allocate firmware pages and map firmware area */ fw_len = ( fw_pages * ARBEL_PAGE_SIZE ); if ( ! arbel->firmware_area ) { arbel->firmware_len = fw_len; arbel->firmware_area = umalloc ( arbel->firmware_len ); if ( ! arbel->firmware_area ) { rc = -ENOMEM; goto err_alloc_fa; } } else { assert ( arbel->firmware_len == fw_len ); } fw_base = user_to_phys ( arbel->firmware_area, 0 ); DBGC ( arbel, "Arbel %p firmware area at [%08lx,%08lx)\n", arbel, fw_base, ( fw_base + fw_len ) ); if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_fa, 0, fw_base, fw_len ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not map firmware: %s\n", arbel, strerror ( rc ) ); goto err_map_fa; } /* Start firmware */ if ( ( rc = arbel_cmd_run_fw ( arbel ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not run firmware: %s\n", arbel, strerror ( rc ) ); goto err_run_fw; } DBGC ( arbel, "Arbel %p firmware started\n", arbel ); return 0; err_run_fw: arbel_cmd_unmap_fa ( arbel ); err_map_fa: err_alloc_fa: err_query_fw: return rc; } /** * Stop firmware running * * @v arbel Arbel device */ static void arbel_stop_firmware ( struct arbel *arbel ) { int rc; if ( ( rc = arbel_cmd_unmap_fa ( arbel ) ) != 0 ) { DBGC ( arbel, "Arbel %p FATAL could not stop firmware: %s\n", arbel, strerror ( rc ) ); /* Leak memory and return; at least we avoid corruption */ arbel->firmware_area = UNULL; return; } } /*************************************************************************** * * Infinihost Context Memory management * *************************************************************************** */ /** * Get device limits * * @v arbel Arbel device * @ret rc Return status code */ static int arbel_get_limits ( struct arbel *arbel ) { struct arbelprm_query_dev_lim dev_lim; int rc; if ( ( rc = arbel_cmd_query_dev_lim ( arbel, &dev_lim ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not get device limits: %s\n", arbel, strerror ( rc ) ); return rc; } arbel->limits.reserved_qps = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_qps ) ); arbel->limits.qpc_entry_size = MLX_GET ( &dev_lim, qpc_entry_sz ); arbel->limits.eqpc_entry_size = MLX_GET ( &dev_lim, eqpc_entry_sz ); arbel->limits.reserved_srqs = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_srqs ) ); arbel->limits.srqc_entry_size = MLX_GET ( &dev_lim, srq_entry_sz ); arbel->limits.reserved_ees = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_ees ) ); arbel->limits.eec_entry_size = MLX_GET ( &dev_lim, eec_entry_sz ); arbel->limits.eeec_entry_size = MLX_GET ( &dev_lim, eeec_entry_sz ); arbel->limits.reserved_cqs = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_cqs ) ); arbel->limits.cqc_entry_size = MLX_GET ( &dev_lim, cqc_entry_sz ); arbel->limits.reserved_mtts = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_mtts ) ); arbel->limits.mtt_entry_size = MLX_GET ( &dev_lim, mtt_entry_sz ); arbel->limits.reserved_mrws = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_mrws ) ); arbel->limits.mpt_entry_size = MLX_GET ( &dev_lim, mpt_entry_sz ); arbel->limits.reserved_rdbs = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_rdbs ) ); arbel->limits.reserved_eqs = MLX_GET ( &dev_lim, num_rsvd_eqs ); arbel->limits.eqc_entry_size = MLX_GET ( &dev_lim, eqc_entry_sz ); arbel->limits.reserved_uars = MLX_GET ( &dev_lim, num_rsvd_uars ); arbel->limits.uar_scratch_entry_size = MLX_GET ( &dev_lim, uar_scratch_entry_sz ); DBGC ( arbel, "Arbel %p reserves %d x %#zx QPC, %d x %#zx EQPC, " "%d x %#zx SRQC\n", arbel, arbel->limits.reserved_qps, arbel->limits.qpc_entry_size, arbel->limits.reserved_qps, arbel->limits.eqpc_entry_size, arbel->limits.reserved_srqs, arbel->limits.srqc_entry_size ); DBGC ( arbel, "Arbel %p reserves %d x %#zx EEC, %d x %#zx EEEC, " "%d x %#zx CQC\n", arbel, arbel->limits.reserved_ees, arbel->limits.eec_entry_size, arbel->limits.reserved_ees, arbel->limits.eeec_entry_size, arbel->limits.reserved_cqs, arbel->limits.cqc_entry_size ); DBGC ( arbel, "Arbel %p reserves %d x %#zx EQC, %d x %#zx MTT, " "%d x %#zx MPT\n", arbel, arbel->limits.reserved_eqs, arbel->limits.eqc_entry_size, arbel->limits.reserved_mtts, arbel->limits.mtt_entry_size, arbel->limits.reserved_mrws, arbel->limits.mpt_entry_size ); DBGC ( arbel, "Arbel %p reserves %d x %#zx RDB, %d x %#zx UAR, " "%d x %#zx UAR scratchpad\n", arbel, arbel->limits.reserved_rdbs, ARBEL_RDB_ENTRY_SIZE, arbel->limits.reserved_uars, ARBEL_PAGE_SIZE, arbel->limits.reserved_uars, arbel->limits.uar_scratch_entry_size ); return 0; } /** * Align ICM table * * @v icm_offset Current ICM offset * @v len ICM table length * @ret icm_offset ICM offset */ static size_t icm_align ( size_t icm_offset, size_t len ) { /* Round up to a multiple of the table size */ assert ( len == ( 1UL << ( fls ( len ) - 1 ) ) ); return ( ( icm_offset + len - 1 ) & ~( len - 1 ) ); } /** * Allocate ICM * * @v arbel Arbel device * @v init_hca INIT_HCA structure to fill in * @ret rc Return status code */ static int arbel_alloc_icm ( struct arbel *arbel, struct arbelprm_init_hca *init_hca ) { struct arbelprm_scalar_parameter icm_size; struct arbelprm_scalar_parameter icm_aux_size; struct arbelprm_scalar_parameter unmap_icm; union arbelprm_doorbell_record *db_rec; size_t icm_offset = 0; unsigned int log_num_uars, log_num_qps, log_num_srqs, log_num_ees; unsigned int log_num_cqs, log_num_mtts, log_num_mpts, log_num_rdbs; unsigned int log_num_eqs, log_num_mcs; size_t icm_len, icm_aux_len; size_t len; physaddr_t icm_phys; int rc; /* Calculate number of each object type within ICM */ log_num_qps = fls ( arbel->limits.reserved_qps + ARBEL_RSVD_SPECIAL_QPS + ARBEL_MAX_QPS - 1 ); log_num_srqs = fls ( arbel->limits.reserved_srqs - 1 ); log_num_ees = fls ( arbel->limits.reserved_ees - 1 ); log_num_cqs = fls ( arbel->limits.reserved_cqs + ARBEL_MAX_CQS - 1 ); log_num_eqs = fls ( arbel->limits.reserved_eqs + ARBEL_MAX_EQS - 1 ); log_num_mtts = fls ( arbel->limits.reserved_mtts - 1 ); log_num_mpts = fls ( arbel->limits.reserved_mrws + 1 - 1 ); log_num_rdbs = fls ( arbel->limits.reserved_rdbs + ARBEL_RSVD_SPECIAL_QPS + ARBEL_MAX_QPS - 1 ); log_num_uars = fls ( arbel->limits.reserved_uars + 1 /* single UAR used */ - 1 ); log_num_mcs = ARBEL_LOG_MULTICAST_HASH_SIZE; /* Queue pair contexts */ len = ( ( 1 << log_num_qps ) * arbel->limits.qpc_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_2 ( init_hca, 13, qpc_eec_cqc_eqc_rdb_parameters.qpc_base_addr_l, ( icm_offset >> 7 ), qpc_eec_cqc_eqc_rdb_parameters.log_num_of_qp, log_num_qps ); DBGC ( arbel, "Arbel %p ICM QPC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_qps ), arbel->limits.qpc_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Extended queue pair contexts */ len = ( ( 1 << log_num_qps ) * arbel->limits.eqpc_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 25, qpc_eec_cqc_eqc_rdb_parameters.eqpc_base_addr_l, icm_offset ); DBGC ( arbel, "Arbel %p ICM EQPC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_qps ), arbel->limits.eqpc_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Completion queue contexts */ len = ( ( 1 << log_num_cqs ) * arbel->limits.cqc_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_2 ( init_hca, 21, qpc_eec_cqc_eqc_rdb_parameters.cqc_base_addr_l, ( icm_offset >> 6 ), qpc_eec_cqc_eqc_rdb_parameters.log_num_of_cq, log_num_cqs ); DBGC ( arbel, "Arbel %p ICM CQC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_cqs ), arbel->limits.cqc_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Event queue contexts */ len = ( ( 1 << log_num_eqs ) * arbel->limits.eqc_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_2 ( init_hca, 33, qpc_eec_cqc_eqc_rdb_parameters.eqc_base_addr_l, ( icm_offset >> 6 ), qpc_eec_cqc_eqc_rdb_parameters.log_num_eq, log_num_eqs ); DBGC ( arbel, "Arbel %p ICM EQC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_eqs ), arbel->limits.eqc_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* End-to-end contexts */ len = ( ( 1 << log_num_ees ) * arbel->limits.eec_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_2 ( init_hca, 17, qpc_eec_cqc_eqc_rdb_parameters.eec_base_addr_l, ( icm_offset >> 7 ), qpc_eec_cqc_eqc_rdb_parameters.log_num_of_ee, log_num_ees ); DBGC ( arbel, "Arbel %p ICM EEC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_ees ), arbel->limits.eec_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Shared receive queue contexts */ len = ( ( 1 << log_num_srqs ) * arbel->limits.srqc_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_2 ( init_hca, 19, qpc_eec_cqc_eqc_rdb_parameters.srqc_base_addr_l, ( icm_offset >> 5 ), qpc_eec_cqc_eqc_rdb_parameters.log_num_of_srq, log_num_srqs ); DBGC ( arbel, "Arbel %p ICM SRQC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_srqs ), arbel->limits.srqc_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Memory protection table */ len = ( ( 1 << log_num_mpts ) * arbel->limits.mpt_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 61, tpt_parameters.mpt_base_adr_l, icm_offset ); MLX_FILL_1 ( init_hca, 62, tpt_parameters.log_mpt_sz, log_num_mpts ); DBGC ( arbel, "Arbel %p ICM MPT is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_mpts ), arbel->limits.mpt_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Remote read data base table */ len = ( ( 1 << log_num_rdbs ) * ARBEL_RDB_ENTRY_SIZE ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 37, qpc_eec_cqc_eqc_rdb_parameters.rdb_base_addr_l, icm_offset ); DBGC ( arbel, "Arbel %p ICM RDB is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_rdbs ), ARBEL_RDB_ENTRY_SIZE, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Extended end-to-end contexts */ len = ( ( 1 << log_num_ees ) * arbel->limits.eeec_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 29, qpc_eec_cqc_eqc_rdb_parameters.eeec_base_addr_l, icm_offset ); DBGC ( arbel, "Arbel %p ICM EEEC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_ees ), arbel->limits.eeec_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Multicast table */ len = ( ( 1 << log_num_mcs ) * sizeof ( struct arbelprm_mgm_entry ) ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 49, multicast_parameters.mc_base_addr_l, icm_offset ); MLX_FILL_1 ( init_hca, 52, multicast_parameters.log_mc_table_entry_sz, fls ( sizeof ( struct arbelprm_mgm_entry ) - 1 ) ); MLX_FILL_1 ( init_hca, 53, multicast_parameters.mc_table_hash_sz, ( 1 << log_num_mcs ) ); MLX_FILL_1 ( init_hca, 54, multicast_parameters.log_mc_table_sz, log_num_mcs /* Only one entry per hash */ ); DBGC ( arbel, "Arbel %p ICM MC is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_mcs ), sizeof ( struct arbelprm_mgm_entry ), icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Memory translation table */ len = ( ( 1 << log_num_mtts ) * arbel->limits.mtt_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 65, tpt_parameters.mtt_base_addr_l, icm_offset ); DBGC ( arbel, "Arbel %p ICM MTT is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_mtts ), arbel->limits.mtt_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* User access region scratchpads */ len = ( ( 1 << log_num_uars ) * arbel->limits.uar_scratch_entry_size ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 77, uar_parameters.uar_scratch_base_addr_l, icm_offset ); DBGC ( arbel, "Arbel %p UAR scratchpad is %d x %#zx at [%zx,%zx)\n", arbel, ( 1 << log_num_uars ), arbel->limits.uar_scratch_entry_size, icm_offset, ( icm_offset + len ) ); icm_offset += len; /* Record amount of ICM to be allocated */ icm_offset = icm_align ( icm_offset, ARBEL_PAGE_SIZE ); icm_len = icm_offset; /* User access region contexts * * The reserved UAR(s) do not need to be backed by physical * memory, and our UAR is allocated separately; neither are * part of the umalloc()ed ICM block, but both contribute to * the total length of ICM virtual address space. */ len = ( ( 1 << log_num_uars ) * ARBEL_PAGE_SIZE ); icm_offset = icm_align ( icm_offset, len ); MLX_FILL_1 ( init_hca, 74, uar_parameters.log_max_uars, log_num_uars ); MLX_FILL_1 ( init_hca, 79, uar_parameters.uar_context_base_addr_l, icm_offset ); arbel->db_rec_offset = ( icm_offset + ( arbel->limits.reserved_uars * ARBEL_PAGE_SIZE ) ); DBGC ( arbel, "Arbel %p UAR is %d x %#zx at [%zx,%zx), doorbells " "[%zx,%zx)\n", arbel, ( 1 << log_num_uars ), ARBEL_PAGE_SIZE, icm_offset, ( icm_offset + len ), arbel->db_rec_offset, ( arbel->db_rec_offset + ARBEL_PAGE_SIZE ) ); icm_offset += len; /* Get ICM auxiliary area size */ memset ( &icm_size, 0, sizeof ( icm_size ) ); MLX_FILL_1 ( &icm_size, 1, value, icm_len ); if ( ( rc = arbel_cmd_set_icm_size ( arbel, &icm_size, &icm_aux_size ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not set ICM size: %s\n", arbel, strerror ( rc ) ); goto err_set_icm_size; } icm_aux_len = ( MLX_GET ( &icm_aux_size, value ) * ARBEL_PAGE_SIZE ); /* Allocate ICM data and auxiliary area */ DBGC ( arbel, "Arbel %p requires %zd kB ICM and %zd kB AUX ICM\n", arbel, ( icm_len / 1024 ), ( icm_aux_len / 1024 ) ); if ( ! arbel->icm ) { arbel->icm_len = icm_len; arbel->icm_aux_len = icm_aux_len; arbel->icm = umalloc ( arbel->icm_len + arbel->icm_aux_len ); if ( ! arbel->icm ) { rc = -ENOMEM; goto err_alloc_icm; } } else { assert ( arbel->icm_len == icm_len ); assert ( arbel->icm_aux_len == icm_aux_len ); } icm_phys = user_to_phys ( arbel->icm, 0 ); /* Allocate doorbell UAR */ arbel->db_rec = malloc_dma ( ARBEL_PAGE_SIZE, ARBEL_PAGE_SIZE ); if ( ! arbel->db_rec ) { rc = -ENOMEM; goto err_alloc_doorbell; } /* Map ICM auxiliary area */ DBGC ( arbel, "Arbel %p ICM AUX at [%08lx,%08lx)\n", arbel, icm_phys, ( icm_phys + arbel->icm_aux_len ) ); if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_icm_aux, 0, icm_phys, arbel->icm_aux_len ) ) != 0 ){ DBGC ( arbel, "Arbel %p could not map AUX ICM: %s\n", arbel, strerror ( rc ) ); goto err_map_icm_aux; } icm_phys += arbel->icm_aux_len; /* Map ICM area */ DBGC ( arbel, "Arbel %p ICM at [%08lx,%08lx)\n", arbel, icm_phys, ( icm_phys + arbel->icm_len ) ); if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_icm, 0, icm_phys, arbel->icm_len ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not map ICM: %s\n", arbel, strerror ( rc ) ); goto err_map_icm; } icm_phys += arbel->icm_len; /* Map doorbell UAR */ DBGC ( arbel, "Arbel %p UAR at [%08lx,%08lx)\n", arbel, virt_to_phys ( arbel->db_rec ), ( virt_to_phys ( arbel->db_rec ) + ARBEL_PAGE_SIZE ) ); if ( ( rc = arbel_map_vpm ( arbel, arbel_cmd_map_icm, arbel->db_rec_offset, virt_to_phys ( arbel->db_rec ), ARBEL_PAGE_SIZE ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not map doorbell UAR: %s\n", arbel, strerror ( rc ) ); goto err_map_doorbell; } /* Initialise doorbell records */ memset ( arbel->db_rec, 0, ARBEL_PAGE_SIZE ); db_rec = &arbel->db_rec[ARBEL_GROUP_SEPARATOR_DOORBELL]; MLX_FILL_1 ( &db_rec->qp, 1, res, ARBEL_UAR_RES_GROUP_SEP ); return 0; memset ( &unmap_icm, 0, sizeof ( unmap_icm ) ); MLX_FILL_1 ( &unmap_icm, 1, value, arbel->db_rec_offset ); arbel_cmd_unmap_icm ( arbel, 1, &unmap_icm ); err_map_doorbell: memset ( &unmap_icm, 0, sizeof ( unmap_icm ) ); arbel_cmd_unmap_icm ( arbel, ( arbel->icm_len / ARBEL_PAGE_SIZE ), &unmap_icm ); err_map_icm: arbel_cmd_unmap_icm_aux ( arbel ); err_map_icm_aux: free_dma ( arbel->db_rec, ARBEL_PAGE_SIZE ); arbel->db_rec= NULL; err_alloc_doorbell: err_alloc_icm: err_set_icm_size: return rc; } /** * Free ICM * * @v arbel Arbel device */ static void arbel_free_icm ( struct arbel *arbel ) { struct arbelprm_scalar_parameter unmap_icm; memset ( &unmap_icm, 0, sizeof ( unmap_icm ) ); MLX_FILL_1 ( &unmap_icm, 1, value, arbel->db_rec_offset ); arbel_cmd_unmap_icm ( arbel, 1, &unmap_icm ); memset ( &unmap_icm, 0, sizeof ( unmap_icm ) ); arbel_cmd_unmap_icm ( arbel, ( arbel->icm_len / ARBEL_PAGE_SIZE ), &unmap_icm ); arbel_cmd_unmap_icm_aux ( arbel ); free_dma ( arbel->db_rec, ARBEL_PAGE_SIZE ); arbel->db_rec = NULL; } /*************************************************************************** * * Initialisation and teardown * *************************************************************************** */ /** * Reset device * * @v arbel Arbel device */ static void arbel_reset ( struct arbel *arbel ) { struct pci_device *pci = arbel->pci; struct pci_config_backup backup; static const uint8_t backup_exclude[] = PCI_CONFIG_BACKUP_EXCLUDE ( 0x58, 0x5c ); uint16_t vendor; unsigned int i; /* Perform device reset and preserve PCI configuration */ pci_backup ( pci, &backup, backup_exclude ); writel ( ARBEL_RESET_MAGIC, ( arbel->config + ARBEL_RESET_OFFSET ) ); for ( i = 0 ; i < ARBEL_RESET_WAIT_TIME_MS ; i++ ) { mdelay ( 1 ); pci_read_config_word ( pci, PCI_VENDOR_ID, &vendor ); if ( vendor != 0xffff ) break; } pci_restore ( pci, &backup, backup_exclude ); } /** * Set up memory protection table * * @v arbel Arbel device * @ret rc Return status code */ static int arbel_setup_mpt ( struct arbel *arbel ) { struct arbelprm_mpt mpt; uint32_t key; int rc; /* Derive key */ key = ( arbel->limits.reserved_mrws | ARBEL_MKEY_PREFIX ); arbel->lkey = ( ( key << 8 ) | ( key >> 24 ) ); /* Initialise memory protection table */ memset ( &mpt, 0, sizeof ( mpt ) ); MLX_FILL_7 ( &mpt, 0, a, 1, rw, 1, rr, 1, lw, 1, lr, 1, pa, 1, r_w, 1 ); MLX_FILL_1 ( &mpt, 2, mem_key, key ); MLX_FILL_2 ( &mpt, 3, pd, ARBEL_GLOBAL_PD, rae, 1 ); MLX_FILL_1 ( &mpt, 6, reg_wnd_len_h, 0xffffffffUL ); MLX_FILL_1 ( &mpt, 7, reg_wnd_len_l, 0xffffffffUL ); if ( ( rc = arbel_cmd_sw2hw_mpt ( arbel, arbel->limits.reserved_mrws, &mpt ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not set up MPT: %s\n", arbel, strerror ( rc ) ); return rc; } return 0; } /** * Configure special queue pairs * * @v arbel Arbel device * @ret rc Return status code */ static int arbel_configure_special_qps ( struct arbel *arbel ) { unsigned int smi_qpn_base; unsigned int gsi_qpn_base; int rc; /* Special QP block must be aligned on an even number */ arbel->special_qpn_base = ( ( arbel->limits.reserved_qps + 1 ) & ~1 ); arbel->qpn_base = ( arbel->special_qpn_base + ARBEL_NUM_SPECIAL_QPS ); DBGC ( arbel, "Arbel %p special QPs at [%lx,%lx]\n", arbel, arbel->special_qpn_base, ( arbel->qpn_base - 1 ) ); smi_qpn_base = arbel->special_qpn_base; gsi_qpn_base = ( smi_qpn_base + 2 ); /* Issue commands to configure special QPs */ if ( ( rc = arbel_cmd_conf_special_qp ( arbel, 0, smi_qpn_base ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not configure SMI QPs: %s\n", arbel, strerror ( rc ) ); return rc; } if ( ( rc = arbel_cmd_conf_special_qp ( arbel, 1, gsi_qpn_base ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not configure GSI QPs: %s\n", arbel, strerror ( rc ) ); return rc; } return 0; } /** * Start Arbel device * * @v arbel Arbel device * @v running Firmware is already running * @ret rc Return status code */ static int arbel_start ( struct arbel *arbel, int running ) { struct arbelprm_init_hca init_hca; unsigned int i; int rc; /* Start firmware if not already running */ if ( ! running ) { if ( ( rc = arbel_start_firmware ( arbel ) ) != 0 ) goto err_start_firmware; } /* Allocate ICM */ memset ( &init_hca, 0, sizeof ( init_hca ) ); if ( ( rc = arbel_alloc_icm ( arbel, &init_hca ) ) != 0 ) goto err_alloc_icm; /* Initialise HCA */ if ( ( rc = arbel_cmd_init_hca ( arbel, &init_hca ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not initialise HCA: %s\n", arbel, strerror ( rc ) ); goto err_init_hca; } /* Set up memory protection */ if ( ( rc = arbel_setup_mpt ( arbel ) ) != 0 ) goto err_setup_mpt; for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ ) arbel->ibdev[i]->rdma_key = arbel->lkey; /* Set up event queue */ if ( ( rc = arbel_create_eq ( arbel ) ) != 0 ) goto err_create_eq; /* Configure special QPs */ if ( ( rc = arbel_configure_special_qps ( arbel ) ) != 0 ) goto err_conf_special_qps; return 0; err_conf_special_qps: arbel_destroy_eq ( arbel ); err_create_eq: err_setup_mpt: arbel_cmd_close_hca ( arbel ); err_init_hca: arbel_free_icm ( arbel ); err_alloc_icm: arbel_stop_firmware ( arbel ); err_start_firmware: return rc; } /** * Stop Arbel device * * @v arbel Arbel device */ static void arbel_stop ( struct arbel *arbel ) { arbel_destroy_eq ( arbel ); arbel_cmd_close_hca ( arbel ); arbel_free_icm ( arbel ); arbel_stop_firmware ( arbel ); arbel_reset ( arbel ); } /** * Open Arbel device * * @v arbel Arbel device * @ret rc Return status code */ static int arbel_open ( struct arbel *arbel ) { int rc; /* Start device if applicable */ if ( arbel->open_count == 0 ) { if ( ( rc = arbel_start ( arbel, 0 ) ) != 0 ) return rc; } /* Increment open counter */ arbel->open_count++; return 0; } /** * Close Arbel device * * @v arbel Arbel device */ static void arbel_close ( struct arbel *arbel ) { /* Decrement open counter */ assert ( arbel->open_count != 0 ); arbel->open_count--; /* Stop device if applicable */ if ( arbel->open_count == 0 ) arbel_stop ( arbel ); } /*************************************************************************** * * Infiniband link-layer operations * *************************************************************************** */ /** * Initialise Infiniband link * * @v ibdev Infiniband device * @ret rc Return status code */ static int arbel_ib_open ( struct ib_device *ibdev ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbelprm_init_ib init_ib; int rc; /* Open hardware */ if ( ( rc = arbel_open ( arbel ) ) != 0 ) goto err_open; /* Initialise IB */ memset ( &init_ib, 0, sizeof ( init_ib ) ); MLX_FILL_3 ( &init_ib, 0, mtu_cap, ARBEL_MTU_2048, port_width_cap, 3, vl_cap, 1 ); MLX_FILL_1 ( &init_ib, 1, max_gid, 1 ); MLX_FILL_1 ( &init_ib, 2, max_pkey, 64 ); if ( ( rc = arbel_cmd_init_ib ( arbel, ibdev->port, &init_ib ) ) != 0 ) { DBGC ( arbel, "Arbel %p port %d could not intialise IB: %s\n", arbel, ibdev->port, strerror ( rc ) ); goto err_init_ib; } /* Update MAD parameters */ ib_smc_update ( ibdev, arbel_mad ); return 0; err_init_ib: arbel_close ( arbel ); err_open: return rc; } /** * Close Infiniband link * * @v ibdev Infiniband device */ static void arbel_ib_close ( struct ib_device *ibdev ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); int rc; /* Close IB */ if ( ( rc = arbel_cmd_close_ib ( arbel, ibdev->port ) ) != 0 ) { DBGC ( arbel, "Arbel %p port %d could not close IB: %s\n", arbel, ibdev->port, strerror ( rc ) ); /* Nothing we can do about this */ } /* Close hardware */ arbel_close ( arbel ); } /** * Inform embedded subnet management agent of a received MAD * * @v ibdev Infiniband device * @v mad MAD * @ret rc Return status code */ static int arbel_inform_sma ( struct ib_device *ibdev, union ib_mad *mad ) { int rc; /* Send the MAD to the embedded SMA */ if ( ( rc = arbel_mad ( ibdev, mad ) ) != 0 ) return rc; /* Update parameters held in software */ ib_smc_update ( ibdev, arbel_mad ); return 0; } /*************************************************************************** * * Multicast group operations * *************************************************************************** */ /** * Attach to multicast group * * @v ibdev Infiniband device * @v qp Queue pair * @v gid Multicast GID * @ret rc Return status code */ static int arbel_mcast_attach ( struct ib_device *ibdev, struct ib_queue_pair *qp, union ib_gid *gid ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbelprm_mgm_hash hash; struct arbelprm_mgm_entry mgm; unsigned int index; int rc; /* Generate hash table index */ if ( ( rc = arbel_cmd_mgid_hash ( arbel, gid, &hash ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not hash GID: %s\n", arbel, strerror ( rc ) ); return rc; } index = MLX_GET ( &hash, hash ); /* Check for existing hash table entry */ if ( ( rc = arbel_cmd_read_mgm ( arbel, index, &mgm ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not read MGM %#x: %s\n", arbel, index, strerror ( rc ) ); return rc; } if ( MLX_GET ( &mgm, mgmqp_0.qi ) != 0 ) { /* FIXME: this implementation allows only a single QP * per multicast group, and doesn't handle hash * collisions. Sufficient for IPoIB but may need to * be extended in future. */ DBGC ( arbel, "Arbel %p MGID index %#x already in use\n", arbel, index ); return -EBUSY; } /* Update hash table entry */ MLX_FILL_2 ( &mgm, 8, mgmqp_0.qpn_i, qp->qpn, mgmqp_0.qi, 1 ); memcpy ( &mgm.u.dwords[4], gid, sizeof ( *gid ) ); if ( ( rc = arbel_cmd_write_mgm ( arbel, index, &mgm ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not write MGM %#x: %s\n", arbel, index, strerror ( rc ) ); return rc; } return 0; } /** * Detach from multicast group * * @v ibdev Infiniband device * @v qp Queue pair * @v gid Multicast GID */ static void arbel_mcast_detach ( struct ib_device *ibdev, struct ib_queue_pair *qp __unused, union ib_gid *gid ) { struct arbel *arbel = ib_get_drvdata ( ibdev ); struct arbelprm_mgm_hash hash; struct arbelprm_mgm_entry mgm; unsigned int index; int rc; /* Generate hash table index */ if ( ( rc = arbel_cmd_mgid_hash ( arbel, gid, &hash ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not hash GID: %s\n", arbel, strerror ( rc ) ); return; } index = MLX_GET ( &hash, hash ); /* Clear hash table entry */ memset ( &mgm, 0, sizeof ( mgm ) ); if ( ( rc = arbel_cmd_write_mgm ( arbel, index, &mgm ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not write MGM %#x: %s\n", arbel, index, strerror ( rc ) ); return; } } /** Arbel Infiniband operations */ static struct ib_device_operations arbel_ib_operations = { .create_cq = arbel_create_cq, .destroy_cq = arbel_destroy_cq, .create_qp = arbel_create_qp, .modify_qp = arbel_modify_qp, .destroy_qp = arbel_destroy_qp, .post_send = arbel_post_send, .post_recv = arbel_post_recv, .poll_cq = arbel_poll_cq, .poll_eq = arbel_poll_eq, .open = arbel_ib_open, .close = arbel_ib_close, .mcast_attach = arbel_mcast_attach, .mcast_detach = arbel_mcast_detach, .set_port_info = arbel_inform_sma, .set_pkey_table = arbel_inform_sma, }; /*************************************************************************** * * PCI interface * *************************************************************************** */ /** * Allocate Arbel device * * @ret arbel Arbel device */ static struct arbel * arbel_alloc ( void ) { struct arbel *arbel; /* Allocate Arbel device */ arbel = zalloc ( sizeof ( *arbel ) ); if ( ! arbel ) goto err_arbel; /* Allocate space for mailboxes */ arbel->mailbox_in = malloc_dma ( ARBEL_MBOX_SIZE, ARBEL_MBOX_ALIGN ); if ( ! arbel->mailbox_in ) goto err_mailbox_in; arbel->mailbox_out = malloc_dma ( ARBEL_MBOX_SIZE, ARBEL_MBOX_ALIGN ); if ( ! arbel->mailbox_out ) goto err_mailbox_out; return arbel; free_dma ( arbel->mailbox_out, ARBEL_MBOX_SIZE ); err_mailbox_out: free_dma ( arbel->mailbox_in, ARBEL_MBOX_SIZE ); err_mailbox_in: free ( arbel ); err_arbel: return NULL; } /** * Free Arbel device * * @v arbel Arbel device */ static void arbel_free ( struct arbel *arbel ) { ufree ( arbel->icm ); ufree ( arbel->firmware_area ); free_dma ( arbel->mailbox_out, ARBEL_MBOX_SIZE ); free_dma ( arbel->mailbox_in, ARBEL_MBOX_SIZE ); free ( arbel ); } /** * Probe PCI device * * @v pci PCI device * @v id PCI ID * @ret rc Return status code */ static int arbel_probe ( struct pci_device *pci ) { struct arbel *arbel; struct ib_device *ibdev; int i; int rc; /* Allocate Arbel device */ arbel = arbel_alloc(); if ( ! arbel ) { rc = -ENOMEM; goto err_alloc; } pci_set_drvdata ( pci, arbel ); arbel->pci = pci; /* Allocate Infiniband devices */ for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ ) { ibdev = alloc_ibdev ( 0 ); if ( ! ibdev ) { rc = -ENOMEM; goto err_alloc_ibdev; } arbel->ibdev[i] = ibdev; ibdev->op = &arbel_ib_operations; ibdev->dev = &pci->dev; ibdev->port = ( ARBEL_PORT_BASE + i ); ib_set_drvdata ( ibdev, arbel ); } /* Fix up PCI device */ adjust_pci_device ( pci ); /* Get PCI BARs */ arbel->config = ioremap ( pci_bar_start ( pci, ARBEL_PCI_CONFIG_BAR ), ARBEL_PCI_CONFIG_BAR_SIZE ); arbel->uar = ioremap ( ( pci_bar_start ( pci, ARBEL_PCI_UAR_BAR ) + ARBEL_PCI_UAR_IDX * ARBEL_PCI_UAR_SIZE ), ARBEL_PCI_UAR_SIZE ); /* Reset device */ arbel_reset ( arbel ); /* Start firmware */ if ( ( rc = arbel_start_firmware ( arbel ) ) != 0 ) goto err_start_firmware; /* Get device limits */ if ( ( rc = arbel_get_limits ( arbel ) ) != 0 ) goto err_get_limits; /* Start device */ if ( ( rc = arbel_start ( arbel, 1 ) ) != 0 ) goto err_start; /* Initialise parameters using SMC */ for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ ) ib_smc_init ( arbel->ibdev[i], arbel_mad ); /* Register Infiniband devices */ for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ ) { if ( ( rc = register_ibdev ( arbel->ibdev[i] ) ) != 0 ) { DBGC ( arbel, "Arbel %p port %d could not register IB " "device: %s\n", arbel, arbel->ibdev[i]->port, strerror ( rc ) ); goto err_register_ibdev; } } /* Leave device quiescent until opened */ if ( arbel->open_count == 0 ) arbel_stop ( arbel ); return 0; i = ARBEL_NUM_PORTS; err_register_ibdev: for ( i-- ; i >= 0 ; i-- ) unregister_ibdev ( arbel->ibdev[i] ); arbel_stop ( arbel ); err_start: err_get_limits: arbel_stop_firmware ( arbel ); err_start_firmware: i = ARBEL_NUM_PORTS; err_alloc_ibdev: for ( i-- ; i >= 0 ; i-- ) ibdev_put ( arbel->ibdev[i] ); arbel_free ( arbel ); err_alloc: return rc; } /** * Remove PCI device * * @v pci PCI device */ static void arbel_remove ( struct pci_device *pci ) { struct arbel *arbel = pci_get_drvdata ( pci ); int i; for ( i = ( ARBEL_NUM_PORTS - 1 ) ; i >= 0 ; i-- ) unregister_ibdev ( arbel->ibdev[i] ); for ( i = ( ARBEL_NUM_PORTS - 1 ) ; i >= 0 ; i-- ) ibdev_put ( arbel->ibdev[i] ); arbel_free ( arbel ); } static struct pci_device_id arbel_nics[] = { PCI_ROM ( 0x15b3, 0x6282, "mt25218", "MT25218 HCA driver", 0 ), PCI_ROM ( 0x15b3, 0x6274, "mt25204", "MT25204 HCA driver", 0 ), }; struct pci_driver arbel_driver __pci_driver = { .ids = arbel_nics, .id_count = ( sizeof ( arbel_nics ) / sizeof ( arbel_nics[0] ) ), .probe = arbel_probe, .remove = arbel_remove, };