/************************************************************************** Etherboot - BOOTP/TFTP Bootstrap Program Skeleton NIC driver for Etherboot ***************************************************************************/ /* * 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, or (at * your option) any later version. */ #include #include #include #include #include #include #include /* to get some global routines like printf */ #include "etherboot.h" /* to get the interface to the body of the program */ #include "nic.h" #define CREATE_OWN 1 #include "mt25218_imp.c" #include "arbel.h" struct ib_address_vector hack_ipoib_bcast_av; static const struct ib_gid arbel_no_gid = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 } }; #if 0 #define MLX_RX_MAX_FILL NUM_IPOIB_RCV_WQES struct mlx_nic { #if ! CREATE_OWN /** Queue pair handle */ udqp_t ipoib_qph; /** Send completion queue */ cq_t snd_cqh; /** Receive completion queue */ cq_t rcv_cqh; #endif /** Broadcast Address Vector */ ud_av_t bcast_av; /** RX fill level */ unsigned int rx_fill; #if CREATE_OWN struct ib_completion_queue *own_send_cq; struct ib_completion_queue *own_recv_cq; struct ib_queue_pair *own_qp; #endif }; static struct io_buffer *static_ipoib_tx_ring[NUM_IPOIB_SND_WQES]; static struct io_buffer *static_ipoib_rx_ring[NUM_IPOIB_RCV_WQES]; static struct arbel static_arbel; #if ! CREATE_OWN static struct arbel_completion_queue static_arbel_ipoib_send_cq = { .ci_doorbell_idx = IPOIB_SND_CQ_CI_DB_IDX, }; static struct ib_completion_queue static_ipoib_send_cq = { .cqn = 1234, /* Only used for debug messages */ .num_cqes = NUM_IPOIB_SND_CQES, .work_queues = LIST_HEAD_INIT ( static_ipoib_send_cq.work_queues ), .dev_priv = &static_arbel_ipoib_send_cq, }; static struct arbel_completion_queue static_arbel_ipoib_recv_cq = { .ci_doorbell_idx = IPOIB_RCV_CQ_CI_DB_IDX, }; static struct ib_completion_queue static_ipoib_recv_cq = { .cqn = 2345, /* Only used for debug messages */ .num_cqes = NUM_IPOIB_RCV_CQES, .work_queues = LIST_HEAD_INIT ( static_ipoib_recv_cq.work_queues ), .dev_priv = &static_arbel_ipoib_recv_cq, }; static struct arbel_queue_pair static_arbel_ipoib_qp = { .send = { .doorbell_idx = IPOIB_SND_QP_DB_IDX, }, .recv = { .doorbell_idx = IPOIB_RCV_QP_DB_IDX, }, }; static struct ib_queue_pair static_ipoib_qp = { .send = { .qp = &static_ipoib_qp, .is_send = 1, .cq = &static_ipoib_send_cq, .num_wqes = NUM_IPOIB_SND_WQES, .iobufs = static_ipoib_tx_ring, .list = LIST_HEAD_INIT (static_ipoib_qp.send.list), .dev_priv = &static_arbel_ipoib_qp.send, }, .recv = { .qp = &static_ipoib_qp, .is_send = 0, .cq = &static_ipoib_recv_cq, .num_wqes = NUM_IPOIB_RCV_WQES, .iobufs = static_ipoib_rx_ring, .list = LIST_HEAD_INIT (static_ipoib_qp.recv.list), .dev_priv = &static_arbel_ipoib_qp.recv, }, .dev_priv = &static_arbel_ipoib_qp, }; #endif static struct ib_device static_ibdev = { .dev_priv = &static_arbel, }; /** * Open network device * * @v netdev Network device * @ret rc Return status code */ static int mlx_open ( struct net_device *netdev ) { ( void ) netdev; return 0; } /** * Close network device * * @v netdev Network device */ static void mlx_close ( struct net_device *netdev ) { ( void ) netdev; } static int arbel_post_send ( struct ib_device *ibdev, struct ib_queue_pair *qp, struct ib_address_vector *av, struct io_buffer *iobuf ); static int mlx_transmit_direct ( struct net_device *netdev, struct io_buffer *iobuf ) { struct mlx_nic *mlx = netdev->priv; int rc; struct ud_av_st *bcast_av = mlx->bcast_av; struct arbelprm_ud_address_vector *bav = ( struct arbelprm_ud_address_vector * ) &bcast_av->av; struct ib_address_vector av = { .dest_qp = bcast_av->dest_qp, .qkey = bcast_av->qkey, .dlid = MLX_GET ( bav, rlid ), .rate = ( MLX_GET ( bav, max_stat_rate ) ? 1 : 4 ), .sl = MLX_GET ( bav, sl ), .gid_present = 1, }; memcpy ( &av.gid, ( ( void * ) bav ) + 16, 16 ); rc = arbel_post_send ( &static_ibdev, #if CREATE_OWN mlx->own_qp, #else &static_ipoib_qp, #endif &av, iobuf ); return rc; } static void arbel_poll_cq ( struct ib_device *ibdev, struct ib_completion_queue *cq, ib_completer_t complete_send, ib_completer_t complete_recv ); static void temp_complete_send ( struct ib_device *ibdev __unused, struct ib_queue_pair *qp, struct ib_completion *completion, struct io_buffer *iobuf ) { struct net_device *netdev = qp->owner_priv; DBG ( "Wahey! TX completion\n" ); netdev_tx_complete_err ( netdev, iobuf, ( completion->syndrome ? -EIO : 0 ) ); } static void temp_complete_recv ( struct ib_device *ibdev __unused, struct ib_queue_pair *qp, struct ib_completion *completion, struct io_buffer *iobuf ) { struct net_device *netdev = qp->owner_priv; struct mlx_nic *mlx = netdev->priv; DBG ( "Yay! RX completion on %p len %zx:\n", iobuf, completion->len ); if ( completion->syndrome ) { netdev_rx_err ( netdev, iobuf, -EIO ); } else { iob_put ( iobuf, completion->len ); iob_pull ( iobuf, sizeof ( struct ib_global_route_header ) ); netdev_rx ( netdev, iobuf ); } mlx->rx_fill--; } static int arbel_post_recv ( struct ib_device *ibdev, struct ib_queue_pair *qp, struct io_buffer *iobuf ); static void mlx_refill_rx ( struct net_device *netdev ) { struct mlx_nic *mlx = netdev->priv; struct io_buffer *iobuf; int rc; while ( mlx->rx_fill < MLX_RX_MAX_FILL ) { iobuf = alloc_iob ( 2048 ); if ( ! iobuf ) break; DBG ( "Posting RX buffer %p:\n", iobuf ); if ( ( rc = arbel_post_recv ( &static_ibdev, #if CREATE_OWN mlx->own_qp, #else &static_ipoib_qp, #endif iobuf ) ) != 0 ) { free_iob ( iobuf ); break; } mlx->rx_fill++; } } /** * Poll for completed and received packets * * @v netdev Network device */ static void mlx_poll ( struct net_device *netdev ) { struct mlx_nic *mlx = netdev->priv; int rc; if ( ( rc = poll_error_buf() ) != 0 ) { DBG ( "poll_error_buf() failed: %s\n", strerror ( rc ) ); return; } /* Drain event queue. We can ignore events, since we're going * to just poll all completion queues anyway. */ if ( ( rc = drain_eq() ) != 0 ) { DBG ( "drain_eq() failed: %s\n", strerror ( rc ) ); return; } /* Poll completion queues */ arbel_poll_cq ( &static_ibdev, #if CREATE_OWN mlx->own_send_cq, #else &static_ipoib_send_cq, #endif temp_complete_send, temp_complete_recv ); #if 0 arbel_poll_cq ( &static_ibdev, #if CREATE_OWN mlx->own_recv_cq, #else &static_ipoib_recv_cq, #endif temp_complete_send, temp_complete_recv ); #endif mlx_refill_rx ( netdev ); } /** * Enable or disable interrupts * * @v netdev Network device * @v enable Interrupts should be enabled */ static void mlx_irq ( struct net_device *netdev, int enable ) { ( void ) netdev; ( void ) enable; } static struct net_device_operations mlx_operations = { .open = mlx_open, .close = mlx_close, .transmit = mlx_transmit_direct, .poll = mlx_poll, .irq = mlx_irq, }; #endif /* 0 */ /*************************************************************************** * * 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; DBGC ( 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 ); DBG_HD ( &hcr, sizeof ( hcr ) ); if ( in_len ) { size_t dump_len = in_len; if ( dump_len > 256 ) dump_len = 256; DBG ( "Input:\n" ); DBG_HD ( in, dump_len ); } /* 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 ) { size_t dump_len = out_len; if ( dump_len > 256 ) dump_len = 256; DBG ( "Output:\n" ); DBG_HD ( out, dump_len ); } 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_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 ) { return arbel_cmd ( arbel, ARBEL_HCR_VOID_CMD ( ARBEL_HCR_HW2SW_CQ ), 1, NULL, cqn, NULL ); } 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, union arbelprm_mad *mad ) { return arbel_cmd ( arbel, ARBEL_HCR_INOUT_CMD ( ARBEL_HCR_MAD_IFC, 1, sizeof ( *mad ), 1, sizeof ( *mad ) ), 0x03, mad, PXE_IB_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 ); } /*************************************************************************** * * 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 = ibdev->dev_priv; 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->eqn ); 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; } cq->dev_priv = 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 = ibdev->dev_priv; struct arbel_completion_queue *arbel_cq = cq->dev_priv; 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 ) ) != 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 ); cq->dev_priv = 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 = ibdev->dev_priv; 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, PXE_IB_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; } qp->dev_priv = 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 = ibdev->dev_priv; struct arbel_queue_pair *arbel_qp = qp->dev_priv; 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 ); qp->dev_priv = 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 ) { DBG ( "arbel_ring_doorbell %08lx:%08lx to %lx\n", 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 ) ); } /** * 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 = ibdev->dev_priv; struct arbel_queue_pair *arbel_qp = qp->dev_priv; 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, PXE_IB_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, 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 = ibdev->dev_priv; struct arbel_queue_pair *arbel_qp = qp->dev_priv; 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 = ibdev->dev_priv; 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 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 ) ); completion.len = MLX_GET ( &cqe->normal, byte_cnt ); 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 = qp->dev_priv; /* Identify work queue entry index */ if ( is_send ) { arbel_send_wq = &arbel_qp->send; wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_send_wq->wqe ) ) / sizeof ( arbel_send_wq->wqe[0] ) ); } else { arbel_recv_wq = &arbel_qp->recv; wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_recv_wq->wqe ) ) / sizeof ( arbel_recv_wq->wqe[0] ) ); } /* 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; /* Pass off to caller's completion handler */ complete = ( is_send ? complete_send : complete_recv ); complete ( ibdev, qp, &completion, iobuf ); return rc; } /** * Drain event queue * * @v arbel Arbel device */ static void arbel_drain_eq ( struct arbel *arbel ) { #warning "drain the event queue" } /** * 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 = ibdev->dev_priv; struct arbel_completion_queue *arbel_cq = cq->dev_priv; struct arbelprm_cq_ci_db_record *ci_db_rec; union arbelprm_completion_entry *cqe; unsigned int cqe_idx_mask; int rc; /* Drain the event queue */ arbel_drain_eq ( arbel ); 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 ) ); } } /*************************************************************************** * * 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 = ibdev->dev_priv; 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 = ibdev->dev_priv; 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, .destroy_qp = arbel_destroy_qp, .post_send = arbel_post_send, .post_recv = arbel_post_recv, .poll_cq = arbel_poll_cq, .mcast_attach = arbel_mcast_attach, .mcast_detach = arbel_mcast_detach, }; static int arbel_mad_ifc ( struct arbel *arbel, union arbelprm_mad *mad ) { struct ib_mad_hdr *hdr = &mad->mad.mad_hdr; int rc; hdr->base_version = IB_MGMT_BASE_VERSION; if ( ( rc = arbel_cmd_mad_ifc ( arbel, mad ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not issue MAD IFC: %s\n", arbel, strerror ( rc ) ); return rc; } if ( hdr->status != 0 ) { DBGC ( arbel, "Arbel %p MAD IFC status %04x\n", arbel, ntohs ( hdr->status ) ); return -EIO; } return 0; } static int arbel_get_port_info ( struct arbel *arbel, struct ib_mad_port_info *port_info ) { union arbelprm_mad mad; struct ib_mad_hdr *hdr = &mad.mad.mad_hdr; int rc; memset ( &mad, 0, sizeof ( mad ) ); hdr->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; hdr->class_version = 1; hdr->method = IB_MGMT_METHOD_GET; hdr->attr_id = htons ( IB_SMP_ATTR_PORT_INFO ); hdr->attr_mod = htonl ( PXE_IB_PORT ); if ( ( rc = arbel_mad_ifc ( arbel, &mad ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not get port info: %s\n", arbel, strerror ( rc ) ); return rc; } memcpy ( port_info, &mad.mad.port_info, sizeof ( *port_info ) ); return 0; } static int arbel_get_guid_info ( struct arbel *arbel, struct ib_mad_guid_info *guid_info ) { union arbelprm_mad mad; struct ib_mad_hdr *hdr = &mad.mad.mad_hdr; int rc; memset ( &mad, 0, sizeof ( mad ) ); hdr->mgmt_class = IB_MGMT_CLASS_SUBN_LID_ROUTED; hdr->class_version = 1; hdr->method = IB_MGMT_METHOD_GET; hdr->attr_id = htons ( IB_SMP_ATTR_GUID_INFO ); if ( ( rc = arbel_mad_ifc ( arbel, &mad ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not get GUID info: %s\n", arbel, strerror ( rc ) ); return rc; } memcpy ( guid_info, &mad.mad.guid_info, sizeof ( *guid_info ) ); return 0; } static int arbel_get_port_gid ( struct arbel *arbel, struct ib_gid *gid ) { struct ib_mad_port_info port_info; struct ib_mad_guid_info guid_info; int rc; if ( ( rc = arbel_get_port_info ( arbel, &port_info ) ) != 0 ) return rc; if ( ( rc = arbel_get_guid_info ( arbel, &guid_info ) ) != 0 ) return rc; memcpy ( &gid->bytes[0], port_info.gid_prefix, 8 ); memcpy ( &gid->bytes[8], guid_info.gid_local, 8 ); return 0; } #if 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 net_device *netdev; struct arbelprm_query_dev_lim dev_lim; struct arbel *arbel = &static_arbel; struct mlx_nic *mlx; struct ib_mac *mac; udqp_t qph; int rc; /* Allocate net device */ netdev = alloc_ibdev ( sizeof ( *mlx ) ); if ( ! netdev ) return -ENOMEM; netdev_init ( netdev, &mlx_operations ); mlx = netdev->priv; pci_set_drvdata ( pci, netdev ); netdev->dev = &pci->dev; memset ( mlx, 0, sizeof ( *mlx ) ); /* Fix up PCI device */ adjust_pci_device ( pci ); /* Initialise hardware */ if ( ( rc = ib_driver_init ( pci, &qph ) ) != 0 ) goto err_ipoib_init; mlx->bcast_av = ib_data.bcast_av; #if ! CREATE_OWN mlx->ipoib_qph = qph; mlx->snd_cqh = ib_data.ipoib_snd_cq; mlx->rcv_cqh = ib_data.ipoib_rcv_cq; mac = ( ( struct ib_mac * ) netdev->ll_addr ); mac->qpn = htonl ( ib_get_qpn ( mlx->ipoib_qph ) ); memcpy ( &mac->gid, ib_data.port_gid.raw, sizeof ( mac->gid ) ); #endif /* Hack up IB structures */ arbel->config = memfree_pci_dev.cr_space; arbel->mailbox_in = dev_buffers_p->inprm_buf; arbel->mailbox_out = dev_buffers_p->outprm_buf; arbel->uar = memfree_pci_dev.uar; arbel->db_rec = dev_ib_data.uar_context_base; arbel->reserved_lkey = dev_ib_data.mkey; arbel->eqn = dev_ib_data.eq.eqn; #if ! CREATE_OWN static_arbel_ipoib_qp.send.wqe = ( ( struct udqp_st * ) qph )->snd_wq; static_arbel_ipoib_qp.recv.wqe = ( ( struct udqp_st * ) qph )->rcv_wq; static_arbel_ipoib_send_cq.cqe = ( ( struct cq_st * ) ib_data.ipoib_snd_cq )->cq_buf; static_arbel_ipoib_recv_cq.cqe = ( ( struct cq_st * ) ib_data.ipoib_rcv_cq )->cq_buf; static_ipoib_qp.qpn = ib_get_qpn ( qph ); static_ipoib_qp.owner_priv = netdev; list_add ( &static_ipoib_qp.send.list, &static_ipoib_send_cq.work_queues ); list_add ( &static_ipoib_qp.recv.list, &static_ipoib_recv_cq.work_queues ); #endif static_ibdev.op = &arbel_ib_operations; /* Get device limits */ 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 ) ); goto err_query_dev_lim; } arbel->limits.reserved_uars = MLX_GET ( &dev_lim, num_rsvd_uars ); arbel->limits.reserved_cqs = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_cqs ) ); arbel->limits.reserved_qps = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_qps ) ); #if CREATE_OWN struct ib_device *ibdev = &static_ibdev; mlx->own_send_cq = ib_create_cq ( ibdev, 32 ); if ( ! mlx->own_send_cq ) { DBG ( "Could not create send CQ\n" ); return -EIO; } #if 0 mlx->own_recv_cq = ib_create_cq ( ibdev, 32 ); if ( ! mlx->own_recv_cq ) { DBG ( "Could not create send CQ\n" ); return -EIO; } #endif mlx->own_qp = ib_create_qp ( ibdev, NUM_IPOIB_SND_WQES, mlx->own_send_cq, NUM_IPOIB_RCV_WQES, //mlx->own_recv_cq, ipoib_qkey ); mlx->own_send_cq, ipoib_qkey ); if ( ! mlx->own_qp ) { DBG ( "Could not create QP\n" ); return -EIO; } mlx->own_qp->owner_priv = netdev; struct ib_gid *bcast_gid = ( struct ib_gid * ) &ib_data.bcast_gid; if ( ( rc = ib_mcast_attach ( ibdev, mlx->own_qp, bcast_gid ) ) != 0 ) { DBG ( "Could not attach to broadcast GID: %s\n", strerror ( rc ) ); return rc; } if ( ( rc = arbel_get_port_gid ( arbel, &ibdev->port_gid ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not determine port GID: %s\n", arbel, strerror ( rc ) ); return rc; } DBG ( "Port GID:\n" ); DBG_HD ( &ibdev->port_gid, sizeof ( ibdev->port_gid ) ); mac = ( ( struct ib_mac * ) netdev->ll_addr ); mac->qpn = htonl ( mlx->own_qp->qpn ); memcpy ( &mac->gid, &ibdev->port_gid, sizeof ( mac->gid ) ); #endif #if 0 DBG ( "MADS SND CQN = %#lx\n", dev_ib_data.mads_qp.snd_cq.cqn ); struct ib_completion_queue *test_cq; test_cq = ib_create_cq ( &static_ibdev, 32 ); if ( test_cq ) { DBG ( "Woot: create_cq() passed!\n" ); } #endif ibdev->dev = &pci->dev; struct ud_av_st *bcast_av = mlx->bcast_av; struct arbelprm_ud_address_vector *bav = ( struct arbelprm_ud_address_vector * ) &bcast_av->av; struct ib_address_vector *av = &hack_ipoib_bcast_av; av->dest_qp = bcast_av->dest_qp; av->qkey = bcast_av->qkey; av->dlid = MLX_GET ( bav, rlid ); av->rate = ( MLX_GET ( bav, max_stat_rate ) ? 1 : 4 ); av->sl = MLX_GET ( bav, sl ); av->gid_present = 1; memcpy ( &av->gid, ( ( void * ) bav ) + 16, 16 ); /* Register network device */ if ( ( rc = register_netdev ( netdev ) ) != 0 ) goto err_register_netdev; return 0; err_query_dev_lim: err_register_netdev: err_ipoib_init: ib_driver_close ( 0 ); netdev_nullify ( netdev ); netdev_put ( netdev ); return rc; } /** * Remove PCI device * * @v pci PCI device */ static void arbel_remove ( struct pci_device *pci ) { struct net_device *netdev = pci_get_drvdata ( pci ); unregister_netdev ( netdev ); ib_driver_close ( 0 ); netdev_nullify ( netdev ); netdev_put ( netdev ); } #endif /* 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 ib_device *ibdev; struct arbelprm_query_dev_lim dev_lim; struct arbel *arbel; udqp_t qph; int rc; /* Allocate Infiniband device */ ibdev = alloc_ibdev ( sizeof ( *arbel ) ); if ( ! ibdev ) return -ENOMEM; ibdev->op = &arbel_ib_operations; pci_set_drvdata ( pci, ibdev ); ibdev->dev = &pci->dev; arbel = ibdev->dev_priv; memset ( arbel, 0, sizeof ( *arbel ) ); /* Fix up PCI device */ adjust_pci_device ( pci ); /* Initialise hardware */ if ( ( rc = ib_driver_init ( pci, &qph ) ) != 0 ) goto err_ib_driver_init; /* Hack up IB structures */ arbel->config = memfree_pci_dev.cr_space; arbel->mailbox_in = dev_buffers_p->inprm_buf; arbel->mailbox_out = dev_buffers_p->outprm_buf; arbel->uar = memfree_pci_dev.uar; arbel->db_rec = dev_ib_data.uar_context_base; arbel->reserved_lkey = dev_ib_data.mkey; arbel->eqn = dev_ib_data.eq.eqn; /* Get device limits */ 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 ) ); goto err_query_dev_lim; } arbel->limits.reserved_uars = MLX_GET ( &dev_lim, num_rsvd_uars ); arbel->limits.reserved_cqs = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_cqs ) ); arbel->limits.reserved_qps = ( 1 << MLX_GET ( &dev_lim, log2_rsvd_qps ) ); /* Get port GID */ if ( ( rc = arbel_get_port_gid ( arbel, &ibdev->port_gid ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not determine port GID: %s\n", arbel, strerror ( rc ) ); goto err_get_port_gid; } struct ud_av_st *bcast_av = ib_data.bcast_av; struct arbelprm_ud_address_vector *bav = ( struct arbelprm_ud_address_vector * ) &bcast_av->av; struct ib_address_vector *av = &hack_ipoib_bcast_av; av->dest_qp = bcast_av->dest_qp; av->qkey = bcast_av->qkey; av->dlid = MLX_GET ( bav, rlid ); av->rate = ( MLX_GET ( bav, max_stat_rate ) ? 1 : 4 ); av->sl = MLX_GET ( bav, sl ); av->gid_present = 1; memcpy ( &av->gid, ( ( void * ) bav ) + 16, 16 ); memcpy ( &ibdev->broadcast_gid, &ib_data.bcast_gid, 16 ); /* Add IPoIB device */ if ( ( rc = ipoib_probe ( ibdev ) ) != 0 ) { DBGC ( arbel, "Arbel %p could not add IPoIB device: %s\n", arbel, strerror ( rc ) ); goto err_ipoib_probe; } return 0; err_ipoib_probe: err_get_port_gid: err_query_dev_lim: ib_driver_close ( 0 ); err_ib_driver_init: free_ibdev ( ibdev ); return rc; } /** * Remove PCI device * * @v pci PCI device */ static void arbel_remove ( struct pci_device *pci ) { struct ib_device *ibdev = pci_get_drvdata ( pci ); ipoib_remove ( ibdev ); ib_driver_close ( 0 ); } 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, };