From e44e3482bdb4d0ebde2d8b41830ac2cdb07948fb Mon Sep 17 00:00:00 2001 From: Yang Zhang Date: Fri, 28 Aug 2015 09:58:54 +0800 Subject: Add qemu 2.4.0 Change-Id: Ic99cbad4b61f8b127b7dc74d04576c0bcbaaf4f5 Signed-off-by: Yang Zhang --- qemu/roms/ipxe/src/drivers/infiniband/arbel.c | 3102 +++++++++++++++++++++++++ 1 file changed, 3102 insertions(+) create mode 100644 qemu/roms/ipxe/src/drivers/infiniband/arbel.c (limited to 'qemu/roms/ipxe/src/drivers/infiniband/arbel.c') diff --git a/qemu/roms/ipxe/src/drivers/infiniband/arbel.c b/qemu/roms/ipxe/src/drivers/infiniband/arbel.c new file mode 100644 index 000000000..1a56ff9af --- /dev/null +++ b/qemu/roms/ipxe/src/drivers/infiniband/arbel.c @@ -0,0 +1,3102 @@ +/* + * 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. + */ + +FILE_LICENCE ( GPL2_OR_LATER ); + +#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, +}; -- cgit 1.2.3-korg