--- /dev/null
+/*
+ * Copyright (C) 2007 Michael Brown <mbrown@fensystems.co.uk>.
+ *
+ * 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 <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include <unistd.h>
+#include <errno.h>
+#include <byteswap.h>
+#include <ipxe/io.h>
+#include <ipxe/pci.h>
+#include <ipxe/pcibackup.h>
+#include <ipxe/malloc.h>
+#include <ipxe/umalloc.h>
+#include <ipxe/iobuf.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/infiniband.h>
+#include <ipxe/ib_smc.h>
+#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,
+};
Code Review / kvmfornfv.git / blobdiff