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|
/*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#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 <gpxe/pci.h>
#include <gpxe/malloc.h>
#include <gpxe/umalloc.h>
#include <gpxe/iobuf.h>
#include <gpxe/netdevice.h>
#include <gpxe/infiniband.h>
#include "arbel.h"
/**
* @file
*
* Mellanox Arbel Infiniband HCA
*
*/
/***************************************************************************
*
* Queue number allocation
*
***************************************************************************
*/
/**
* Allocate queue number
*
* @v q_inuse Queue usage bitmask
* @v max_inuse Maximum number of in-use queues
* @ret qn_offset Free queue number offset, or negative error
*/
static int arbel_alloc_qn_offset ( arbel_bitmask_t *q_inuse,
unsigned int max_inuse ) {
unsigned int qn_offset = 0;
arbel_bitmask_t mask = 1;
while ( qn_offset < max_inuse ) {
if ( ( mask & *q_inuse ) == 0 ) {
*q_inuse |= mask;
return qn_offset;
}
qn_offset++;
mask <<= 1;
if ( ! mask ) {
mask = 1;
q_inuse++;
}
}
return -ENFILE;
}
/**
* Free queue number
*
* @v q_inuse Queue usage bitmask
* @v qn_offset Queue number offset
*/
static void arbel_free_qn_offset ( arbel_bitmask_t *q_inuse, int qn_offset ) {
arbel_bitmask_t mask;
mask = ( 1 << ( qn_offset % ( 8 * sizeof ( mask ) ) ) );
q_inuse += ( qn_offset / ( 8 * sizeof ( mask ) ) );
*q_inuse &= ~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_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_1 ( &hcr, 4, out_param_l,
virt_to_bus ( out_buffer ) );
}
MLX_FILL_3 ( &hcr, 6,
opcode, opcode,
opcode_modifier, op_mod,
go, 1 );
DBGC2_HD ( arbel, &hcr, sizeof ( hcr ) );
if ( in_len ) {
DBGC2 ( arbel, "Input:\n" );
DBGC2_HD ( arbel, in, ( ( 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:\n" );
DBGC2_HD ( arbel, out, ( ( 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_sw2hw_eq ( struct arbel *arbel, unsigned int index,
const struct arbelprm_eqc *eqc ) {
return arbel_cmd ( arbel,
ARBEL_HCR_IN_CMD ( ARBEL_HCR_SW2HW_EQ,
1, sizeof ( *eqc ) ),
0, eqc, index, NULL );
}
static inline int
arbel_cmd_hw2sw_eq ( struct arbel *arbel, unsigned int index ) {
return arbel_cmd ( arbel,
ARBEL_HCR_VOID_CMD ( ARBEL_HCR_HW2SW_EQ ),
1, NULL, index, NULL );
}
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_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_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_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 struct 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 ) {
return arbel_cmd ( arbel,
ARBEL_HCR_VOID_CMD ( ARBEL_HCR_UNMAP_ICM ),
0, NULL, 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 );
}
/***************************************************************************
*
* Completion queue operations
*
***************************************************************************
*/
/**
* 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_alloc_qn_offset ( 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 ( cqn_offset );
arbel_cq->arm_doorbell_idx = arbel_cq_arm_doorbell_idx ( cqn_offset );
/* 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_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_NO_EQ );
MLX_FILL_1 ( &cqctx, 6, pd, ARBEL_GLOBAL_PD );
MLX_FILL_1 ( &cqctx, 7, l_key, arbel->reserved_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 SW2HW_CQ failed: %s\n",
arbel, strerror ( rc ) );
goto err_sw2hw_cq;
}
DBGC ( arbel, "Arbel %p CQN %#lx ring at [%p,%p)\n",
arbel, cq->cqn, arbel_cq->cqe,
( ( ( void * ) arbel_cq->cqe ) + arbel_cq->cqe_size ) );
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_free_qn_offset ( 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 FATAL HW2SW_CQ failed on CQN %#lx: "
"%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_free_qn_offset ( arbel->cq_inuse, cqn_offset );
ib_cq_set_drvdata ( cq, NULL );
}
/***************************************************************************
*
* Queue pair operations
*
***************************************************************************
*/
/**
* 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 ) {
struct arbelprm_ud_send_wqe *wqe;
struct arbelprm_ud_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].ud;
next_wqe = &arbel_send_wq->wqe[ ( i + 1 ) & wqe_idx_mask ].ud;
MLX_FILL_1 ( &wqe->next, 0, nda_31_6,
( virt_to_bus ( next_wqe ) >> 6 ) );
}
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, ( sizeof ( *wqe ) / 16 ) );
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;
int qpn_offset;
int rc;
/* Find a free queue pair number */
qpn_offset = arbel_alloc_qn_offset ( arbel->qp_inuse, ARBEL_MAX_QPS );
if ( qpn_offset < 0 ) {
DBGC ( arbel, "Arbel %p out of queue pairs\n", arbel );
rc = qpn_offset;
goto err_qpn_offset;
}
qp->qpn = ( ARBEL_QPN_BASE + arbel->limits.reserved_qps + qpn_offset );
/* 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 ( qpn_offset );
arbel_qp->recv.doorbell_idx = arbel_recv_doorbell_idx ( qpn_offset );
/* 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;
/* 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 );
/* Hand queue over to hardware */
memset ( &qpctx, 0, sizeof ( qpctx ) );
MLX_FILL_3 ( &qpctx, 2,
qpc_eec_data.de, 1,
qpc_eec_data.pm_state, 0x03 /* Always 0x03 for UD */,
qpc_eec_data.st, ARBEL_ST_UD );
MLX_FILL_6 ( &qpctx, 4,
qpc_eec_data.mtu, ARBEL_MTU_2048,
qpc_eec_data.msg_max, 11 /* 2^11 = 2048 */,
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_1 ( &qpctx, 29, qpc_eec_data.wqe_lkey, arbel->reserved_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,
( virt_to_bus ( arbel_qp->send.wqe ) >> 6 ) );
MLX_FILL_1 ( &qpctx, 35, qpc_eec_data.snd_db_record_index,
arbel_qp->send.doorbell_idx );
MLX_FILL_1 ( &qpctx, 38, 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,
( virt_to_bus ( arbel_qp->recv.wqe ) >> 6 ) );
MLX_FILL_1 ( &qpctx, 43, qpc_eec_data.rcv_db_record_index,
arbel_qp->recv.doorbell_idx );
MLX_FILL_1 ( &qpctx, 44, qpc_eec_data.q_key, qp->qkey );
if ( ( rc = arbel_cmd_rst2init_qpee ( arbel, qp->qpn, &qpctx )) != 0 ){
DBGC ( arbel, "Arbel %p RST2INIT_QPEE failed: %s\n",
arbel, strerror ( rc ) );
goto err_rst2init_qpee;
}
memset ( &qpctx, 0, sizeof ( qpctx ) );
MLX_FILL_2 ( &qpctx, 4,
qpc_eec_data.mtu, ARBEL_MTU_2048,
qpc_eec_data.msg_max, 11 /* 2^11 = 2048 */ );
if ( ( rc = arbel_cmd_init2rtr_qpee ( arbel, qp->qpn, &qpctx )) != 0 ){
DBGC ( arbel, "Arbel %p INIT2RTR_QPEE failed: %s\n",
arbel, strerror ( rc ) );
goto err_init2rtr_qpee;
}
memset ( &qpctx, 0, sizeof ( qpctx ) );
if ( ( rc = arbel_cmd_rtr2rts_qpee ( arbel, qp->qpn, &qpctx ) ) != 0 ){
DBGC ( arbel, "Arbel %p RTR2RTS_QPEE failed: %s\n",
arbel, strerror ( rc ) );
goto err_rtr2rts_qpee;
}
DBGC ( arbel, "Arbel %p QPN %#lx send ring at [%p,%p)\n",
arbel, qp->qpn, arbel_qp->send.wqe,
( ( (void *) arbel_qp->send.wqe ) + arbel_qp->send.wqe_size ) );
DBGC ( arbel, "Arbel %p QPN %#lx receive ring at [%p,%p)\n",
arbel, qp->qpn, arbel_qp->recv.wqe,
( ( (void *) arbel_qp->recv.wqe ) + arbel_qp->recv.wqe_size ) );
ib_qp_set_drvdata ( qp, arbel_qp );
return 0;
err_rtr2rts_qpee:
err_init2rtr_qpee:
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 );
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_qn_offset ( arbel->qp_inuse, qpn_offset );
err_qpn_offset:
return rc;
}
/**
* 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 qpn_offset;
int rc;
/* Take ownership back from hardware */
if ( ( rc = arbel_cmd_2rst_qpee ( arbel, qp->qpn ) ) != 0 ) {
DBGC ( arbel, "Arbel %p FATAL 2RST_QPEE failed on QPN %#lx: "
"%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 */
qpn_offset = ( qp->qpn - ARBEL_QPN_BASE - arbel->limits.reserved_qps );
arbel_free_qn_offset ( arbel->qp_inuse, qpn_offset );
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 %08lx:%08lx at %lx\n",
arbel, db_reg->dword[0], 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 struct ib_gid arbel_no_gid = {
{ { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2, 0, 0, 0 } }
};
/**
* Post send work queue entry
*
* @v ibdev Infiniband device
* @v qp Queue pair
* @v av 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 *av,
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;
struct arbelprm_ud_send_wqe *prev_wqe;
struct arbelprm_ud_send_wqe *wqe;
struct arbelprm_qp_db_record *qp_db_rec;
union arbelprm_doorbell_register db_reg;
const struct ib_gid *gid;
unsigned int 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 send queue full", arbel );
return -ENOBUFS;
}
wq->iobufs[wq->next_idx & wqe_idx_mask] = iobuf;
prev_wqe = &arbel_send_wq->wqe[(wq->next_idx - 1) & wqe_idx_mask].ud;
wqe = &arbel_send_wq->wqe[wq->next_idx & wqe_idx_mask].ud;
/* Construct work queue entry */
MLX_FILL_1 ( &wqe->next, 1, always1, 1 );
memset ( &wqe->ctrl, 0, sizeof ( wqe->ctrl ) );
MLX_FILL_1 ( &wqe->ctrl, 0, always1, 1 );
memset ( &wqe->ud, 0, sizeof ( wqe->ud ) );
MLX_FILL_2 ( &wqe->ud, 0,
ud_address_vector.pd, ARBEL_GLOBAL_PD,
ud_address_vector.port_number, ibdev->port );
MLX_FILL_2 ( &wqe->ud, 1,
ud_address_vector.rlid, av->dlid,
ud_address_vector.g, av->gid_present );
MLX_FILL_2 ( &wqe->ud, 2,
ud_address_vector.max_stat_rate,
( ( av->rate >= 3 ) ? 0 : 1 ),
ud_address_vector.msg, 3 );
MLX_FILL_1 ( &wqe->ud, 3, ud_address_vector.sl, av->sl );
gid = ( av->gid_present ? &av->gid : &arbel_no_gid );
memcpy ( &wqe->ud.u.dwords[4], gid, sizeof ( *gid ) );
MLX_FILL_1 ( &wqe->ud, 8, destination_qp, av->dest_qp );
MLX_FILL_1 ( &wqe->ud, 9, q_key, av->qkey );
MLX_FILL_1 ( &wqe->data[0], 0, byte_count, iob_len ( iobuf ) );
MLX_FILL_1 ( &wqe->data[0], 1, l_key, arbel->reserved_lkey );
MLX_FILL_1 ( &wqe->data[0], 3,
local_address_l, virt_to_bus ( iobuf->data ) );
/* Update previous work queue entry's "next" field */
nds = ( ( offsetof ( typeof ( *wqe ), data ) +
sizeof ( wqe->data[0] ) ) >> 4 );
MLX_SET ( &prev_wqe->next, nopcode, ARBEL_OPCODE_SEND );
MLX_FILL_3 ( &prev_wqe->next, 1,
nds, nds,
f, 1,
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, 1,
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 receive queue full", arbel );
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->reserved_lkey );
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
* @v complete_send Send completion handler
* @v complete_recv Receive completion handler
* @ret rc Return status code
*/
static int arbel_complete ( struct ib_device *ibdev,
struct ib_completion_queue *cq,
union arbelprm_completion_entry *cqe,
ib_completer_t complete_send,
ib_completer_t complete_recv ) {
struct arbel *arbel = ib_get_drvdata ( ibdev );
struct ib_completion completion;
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;
ib_completer_t complete;
unsigned int opcode;
unsigned long qpn;
int is_send;
unsigned long wqe_adr;
unsigned int wqe_idx;
int rc = 0;
/* Parse completion */
memset ( &completion, 0, sizeof ( 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 );
completion.syndrome = MLX_GET ( &cqe->error, syndrome );
DBGC ( arbel, "Arbel %p CPN %lx syndrome %x vendor %lx\n",
arbel, cq->cqn, completion.syndrome,
MLX_GET ( &cqe->error, vendor_code ) );
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 );
}
/* Identify I/O buffer */
iobuf = wq->iobufs[wqe_idx];
if ( ! iobuf ) {
DBGC ( arbel, "Arbel %p CQN %lx QPN %lx empty WQE %x\n",
arbel, cq->cqn, qpn, wqe_idx );
return -EIO;
}
wq->iobufs[wqe_idx] = NULL;
/* Fill in length for received packets */
if ( ! is_send ) {
completion.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 );
if ( completion.len > iob_tailroom ( iobuf ) ) {
DBGC ( arbel, "Arbel %p CQN %lx QPN %lx IDX %x "
"overlength received packet length %zd\n",
arbel, cq->cqn, qpn, wqe_idx, completion.len );
return -EIO;
}
}
/* Pass off to caller's completion handler */
complete = ( is_send ? complete_send : complete_recv );
complete ( ibdev, qp, &completion, iobuf );
return rc;
}
/**
* Poll completion queue
*
* @v ibdev Infiniband device
* @v cq Completion queue
* @v complete_send Send completion handler
* @v complete_recv Receive completion handler
*/
static void arbel_poll_cq ( struct ib_device *ibdev,
struct ib_completion_queue *cq,
ib_completer_t complete_send,
ib_completer_t complete_recv ) {
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, complete_send,
complete_recv ) ) != 0 ) {
DBGC ( arbel, "Arbel %p failed to complete: %s\n",
arbel, 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 ) );
}
}
/***************************************************************************
*
* Infiniband link-layer operations
*
***************************************************************************
*/
/**
* Initialise Infiniband link
*
* @v ibdev Infiniband device
* @ret rc Return status code
*/
static int arbel_open ( struct ib_device *ibdev ) {
struct arbel *arbel = ib_get_drvdata ( ibdev );
struct arbelprm_init_ib init_ib;
int rc;
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 could not intialise IB: %s\n",
arbel, strerror ( rc ) );
return rc;
}
return 0;
}
/**
* Close Infiniband link
*
* @v ibdev Infiniband device
*/
static void arbel_close ( struct ib_device *ibdev ) {
struct arbel *arbel = ib_get_drvdata ( ibdev );
int rc;
if ( ( rc = arbel_cmd_close_ib ( arbel, ibdev->port ) ) != 0 ) {
DBGC ( arbel, "Arbel %p could not close IB: %s\n",
arbel, strerror ( rc ) );
/* Nothing we can do about this */
}
}
/***************************************************************************
*
* 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,
struct 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,
struct 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;
}
}
/***************************************************************************
*
* MAD operations
*
***************************************************************************
*/
/**
* Issue management datagram
*
* @v ibdev Infiniband device
* @v mad Management datagram
* @v len Length of management datagram
* @ret rc Return status code
*/
static int arbel_mad ( struct ib_device *ibdev, struct ib_mad_hdr *mad,
size_t len ) {
struct arbel *arbel = ib_get_drvdata ( ibdev );
union arbelprm_mad mad_ifc;
int rc;
/* Copy in request packet */
memset ( &mad_ifc, 0, sizeof ( mad_ifc ) );
assert ( len <= sizeof ( mad_ifc.mad ) );
memcpy ( &mad_ifc.mad, mad, len );
/* Issue MAD */
if ( ( rc = arbel_cmd_mad_ifc ( arbel, ibdev->port,
&mad_ifc ) ) != 0 ) {
DBGC ( arbel, "Arbel %p could not issue MAD IFC: %s\n",
arbel, strerror ( rc ) );
return rc;
}
/* Copy out reply packet */
memcpy ( mad, &mad_ifc.mad, len );
if ( mad->status != 0 ) {
DBGC ( arbel, "Arbel %p MAD IFC status %04x\n",
arbel, ntohs ( mad->status ) );
return -EIO;
}
return 0;
}
/** 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,
.destroy_qp = arbel_destroy_qp,
.post_send = arbel_post_send,
.post_recv = arbel_post_recv,
.poll_cq = arbel_poll_cq,
.open = arbel_open,
.close = arbel_close,
.mcast_attach = arbel_mcast_attach,
.mcast_detach = arbel_mcast_detach,
.mad = arbel_mad,
};
/***************************************************************************
*
* Firmware control
*
***************************************************************************
*/
/**
* 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;
struct arbelprm_virtual_physical_mapping map_fa;
unsigned int fw_pages;
unsigned int log2_fw_pages;
size_t fw_size;
physaddr_t fw_base;
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 %ld.%ld.%ld\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 );
log2_fw_pages = fls ( fw_pages - 1 );
fw_pages = ( 1 << log2_fw_pages );
DBGC ( arbel, "Arbel %p requires %d kB for firmware\n",
arbel, ( fw_pages * 4 ) );
/* 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_size = ( fw_pages * 4096 );
arbel->firmware_area = umalloc ( fw_size );
if ( ! arbel->firmware_area ) {
rc = -ENOMEM;
goto err_alloc_fa;
}
fw_base = ( user_to_phys ( arbel->firmware_area, fw_size ) &
~( fw_size - 1 ) );
DBGC ( arbel, "Arbel %p firmware area at physical [%lx,%lx)\n",
arbel, fw_base, ( fw_base + fw_size ) );
memset ( &map_fa, 0, sizeof ( map_fa ) );
MLX_FILL_2 ( &map_fa, 3,
log2size, log2_fw_pages,
pa_l, ( fw_base >> 12 ) );
if ( ( rc = arbel_cmd_map_fa ( arbel, &map_fa ) ) != 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:
ufree ( arbel->firmware_area );
arbel->firmware_area = UNULL;
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 */
return;
}
ufree ( arbel->firmware_area );
arbel->firmware_area = UNULL;
}
/***************************************************************************
*
* 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.eqc_entry_size = MLX_GET ( &dev_lim, eqc_entry_sz );
arbel->limits.reserved_uars = MLX_GET ( &dev_lim, num_rsvd_uars );
return 0;
}
/**
* Get ICM usage
*
* @v log_num_entries Log2 of the number of entries
* @v entry_size Entry size
* @ret usage Usage size in ICM
*/
static size_t icm_usage ( unsigned int log_num_entries, size_t entry_size ) {
size_t usage;
usage = ( ( 1 << log_num_entries ) * entry_size );
usage = ( ( usage + 4095 ) & ~4095 );
return usage;
}
/**
* 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_virtual_physical_mapping map_icm_aux;
struct arbelprm_virtual_physical_mapping map_icm;
union arbelprm_doorbell_record *db_rec;
size_t icm_offset = 0;
unsigned int log_num_qps, log_num_srqs, log_num_ees, log_num_cqs;
unsigned int log_num_mtts, log_num_mpts, log_num_rdbs, log_num_eqs;
int rc;
icm_offset = ( ( arbel->limits.reserved_uars + 1 ) << 12 );
/* Queue pair contexts */
log_num_qps = fls ( arbel->limits.reserved_qps + ARBEL_MAX_QPS - 1 );
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 base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_qps, arbel->limits.qpc_entry_size );
/* Extended queue pair contexts */
MLX_FILL_1 ( init_hca, 25,
qpc_eec_cqc_eqc_rdb_parameters.eqpc_base_addr_l,
icm_offset );
DBGC ( arbel, "Arbel %p ICM EQPC base = %zx\n", arbel, icm_offset );
// icm_offset += icm_usage ( log_num_qps, arbel->limits.eqpc_entry_size );
icm_offset += icm_usage ( log_num_qps, arbel->limits.qpc_entry_size );
/* Shared receive queue contexts */
log_num_srqs = fls ( arbel->limits.reserved_srqs - 1 );
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 base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_srqs, arbel->limits.srqc_entry_size );
/* End-to-end contexts */
log_num_ees = fls ( arbel->limits.reserved_ees - 1 );
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 base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_ees, arbel->limits.eec_entry_size );
/* Extended end-to-end contexts */
MLX_FILL_1 ( init_hca, 29,
qpc_eec_cqc_eqc_rdb_parameters.eeec_base_addr_l,
icm_offset );
DBGC ( arbel, "Arbel %p ICM EEEC base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_ees, arbel->limits.eeec_entry_size );
/* Completion queue contexts */
log_num_cqs = fls ( arbel->limits.reserved_cqs + ARBEL_MAX_CQS - 1 );
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 base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_cqs, arbel->limits.cqc_entry_size );
/* Memory translation table */
log_num_mtts = fls ( arbel->limits.reserved_mtts - 1 );
MLX_FILL_1 ( init_hca, 65,
tpt_parameters.mtt_base_addr_l, icm_offset );
DBGC ( arbel, "Arbel %p ICM MTT base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_mtts, arbel->limits.mtt_entry_size );
/* Memory protection table */
log_num_mpts = fls ( arbel->limits.reserved_mrws + 1 - 1 );
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 MTT base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_mpts, arbel->limits.mpt_entry_size );
/* RDMA something or other */
log_num_rdbs = fls ( arbel->limits.reserved_rdbs - 1 );
MLX_FILL_1 ( init_hca, 37,
qpc_eec_cqc_eqc_rdb_parameters.rdb_base_addr_l,
icm_offset );
DBGC ( arbel, "Arbel %p ICM RDB base = %zx\n", arbel, icm_offset );
icm_offset += icm_usage ( log_num_rdbs, 32 );
/* Event queue contexts */
log_num_eqs = 6;
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 EQ base = %zx\n", arbel, icm_offset );
icm_offset += ( ( 1 << log_num_eqs ) * arbel->limits.eqc_entry_size );
/* Multicast table */
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, 8 );
MLX_FILL_1 ( init_hca, 54,
multicast_parameters.log_mc_table_sz, 3 );
DBGC ( arbel, "Arbel %p ICM MC base = %zx\n", arbel, icm_offset );
icm_offset += ( 8 * sizeof ( struct arbelprm_mgm_entry ) );
arbel->icm_len = icm_offset;
arbel->icm_len = ( ( arbel->icm_len + 4095 ) & ~4095 );
/* Get ICM auxiliary area size */
memset ( &icm_size, 0, sizeof ( icm_size ) );
MLX_FILL_1 ( &icm_size, 1, value, arbel->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;
}
arbel->icm_aux_len = ( MLX_GET ( &icm_aux_size, value ) * 4096 );
/* Allocate ICM data and auxiliary area */
DBGC ( arbel, "Arbel %p requires %zd kB ICM and %zd kB AUX ICM\n",
arbel, ( arbel->icm_len / 1024 ),
( arbel->icm_aux_len / 1024 ) );
arbel->icm = umalloc ( arbel->icm_len + arbel->icm_aux_len );
if ( ! arbel->icm ) {
rc = -ENOMEM;
goto err_alloc;
}
/* Map ICM auxiliary area */
memset ( &map_icm_aux, 0, sizeof ( map_icm_aux ) );
MLX_FILL_2 ( &map_icm_aux, 3,
log2size, fls ( ( arbel->icm_aux_len / 4096 ) - 1 ),
pa_l,
( user_to_phys ( arbel->icm, arbel->icm_len ) >> 12 ) );
if ( ( rc = arbel_cmd_map_icm_aux ( arbel, &map_icm_aux ) ) != 0 ) {
DBGC ( arbel, "Arbel %p could not map AUX ICM: %s\n",
arbel, strerror ( rc ) );
goto err_map_icm_aux;
}
/* MAP ICM area */
memset ( &map_icm, 0, sizeof ( map_icm ) );
MLX_FILL_2 ( &map_icm, 3,
log2size, fls ( ( arbel->icm_len / 4096 ) - 1 ),
pa_l, ( user_to_phys ( arbel->icm, 0 ) >> 12 ) );
if ( ( rc = arbel_cmd_map_icm ( arbel, &map_icm ) ) != 0 ) {
DBGC ( arbel, "Arbel %p could not map ICM: %s\n",
arbel, strerror ( rc ) );
goto err_map_icm;
}
/* Initialise UAR context */
arbel->db_rec = phys_to_virt ( user_to_phys ( arbel->icm, 0 ) +
( arbel->limits.reserved_uars *
ARBEL_PAGE_SIZE ) );
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;
arbel_cmd_unmap_icm ( arbel, ( arbel->icm_len / 4096 ) );
err_map_icm:
arbel_cmd_unmap_icm_aux ( arbel );
err_map_icm_aux:
ufree ( arbel->icm );
arbel->icm = UNULL;
err_alloc:
err_set_icm_size:
return rc;
}
/**
* Free ICM
*
* @v arbel Arbel device
*/
static void arbel_free_icm ( struct arbel *arbel ) {
arbel_cmd_unmap_icm ( arbel, ( arbel->icm_len / 4096 ) );
arbel_cmd_unmap_icm_aux ( arbel );
ufree ( arbel->icm );
arbel->icm = UNULL;
}
/***************************************************************************
*
* PCI interface
*
***************************************************************************
*/
/**
* 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->reserved_lkey = ( ( key << 8 ) | ( key >> 24 ) );
/* Initialise memory protection table */
memset ( &mpt, 0, sizeof ( mpt ) );
MLX_FILL_4 ( &mpt, 0,
r_w, 1,
pa, 1,
lr, 1,
lw, 1 );
MLX_FILL_1 ( &mpt, 2, mem_key, key );
MLX_FILL_1 ( &mpt, 3, pd, ARBEL_GLOBAL_PD );
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;
}
/**
* Probe PCI device
*
* @v pci PCI device
* @v id PCI ID
* @ret rc Return status code
*/
static int arbel_probe ( struct pci_device *pci,
const struct pci_device_id *id __unused ) {
struct arbel *arbel;
struct ib_device *ibdev;
struct arbelprm_init_hca init_hca;
int i;
int rc;
/* Allocate Arbel device */
arbel = zalloc ( sizeof ( *arbel ) );
if ( ! arbel ) {
rc = -ENOMEM;
goto err_alloc_arbel;
}
pci_set_drvdata ( pci, arbel );
/* 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 );
/* Allocate space for mailboxes */
arbel->mailbox_in = malloc_dma ( ARBEL_MBOX_SIZE, ARBEL_MBOX_ALIGN );
if ( ! arbel->mailbox_in ) {
rc = -ENOMEM;
goto err_mailbox_in;
}
arbel->mailbox_out = malloc_dma ( ARBEL_MBOX_SIZE, ARBEL_MBOX_ALIGN );
if ( ! arbel->mailbox_out ) {
rc = -ENOMEM;
goto err_mailbox_out;
}
/* 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;
/* Allocate ICM */
memset ( &init_hca, 0, sizeof ( init_hca ) );
if ( ( rc = arbel_alloc_icm ( arbel, &init_hca ) ) != 0 )
goto err_alloc_icm;
/* Initialise HCA */
MLX_FILL_1 ( &init_hca, 74, uar_parameters.log_max_uars, 1 );
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;
/* Register Infiniband devices */
for ( i = 0 ; i < ARBEL_NUM_PORTS ; i++ ) {
if ( ( rc = register_ibdev ( arbel->ibdev[i] ) ) != 0 ) {
DBGC ( arbel, "Arbel %p could not register IB "
"device: %s\n", arbel, strerror ( rc ) );
goto err_register_ibdev;
}
}
return 0;
i = ( ARBEL_NUM_PORTS - 1 );
err_register_ibdev:
for ( ; i >= 0 ; i-- )
unregister_ibdev ( arbel->ibdev[i] );
err_setup_mpt:
arbel_cmd_close_hca ( arbel );
err_init_hca:
arbel_free_icm ( arbel );
err_alloc_icm:
err_get_limits:
arbel_stop_firmware ( arbel );
err_start_firmware:
free_dma ( arbel->mailbox_out, ARBEL_MBOX_SIZE );
err_mailbox_out:
free_dma ( arbel->mailbox_in, ARBEL_MBOX_SIZE );
err_mailbox_in:
i = ( ARBEL_NUM_PORTS - 1 );
err_alloc_ibdev:
for ( ; i >= 0 ; i-- )
free_ibdev ( arbel->ibdev[i] );
free ( arbel );
err_alloc_arbel:
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] );
arbel_cmd_close_hca ( arbel );
arbel_free_icm ( arbel );
arbel_stop_firmware ( arbel );
arbel_stop_firmware ( arbel );
free_dma ( arbel->mailbox_out, ARBEL_MBOX_SIZE );
free_dma ( arbel->mailbox_in, ARBEL_MBOX_SIZE );
for ( i = ( ARBEL_NUM_PORTS - 1 ) ; i >= 0 ; i-- )
free_ibdev ( arbel->ibdev[i] );
free ( arbel );
}
static struct pci_device_id arbel_nics[] = {
PCI_ROM ( 0x15b3, 0x6282, "mt25218", "MT25218 HCA driver" ),
PCI_ROM ( 0x15b3, 0x6274, "mt25204", "MT25204 HCA driver" ),
};
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,
};
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