/************************************************************************** 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 /* to get some global routines like printf */ #include "etherboot.h" /* to get the interface to the body of the program */ #include "nic.h" #include "mt25218_imp.c" struct arbel_send_work_queue { /** Doorbell number */ unsigned int doorbell_idx; /** Work queue entries */ // struct ud_send_wqe_st *wqe; union ud_send_wqe_u *wqe_u; }; struct arbel { /** User Access Region */ void *uar; /** Doorbell records */ union db_record_st *db_rec; }; struct mlx_nic { /** Queue pair handle */ udqp_t ipoib_qph; /** Broadcast Address Vector */ ud_av_t bcast_av; /** Send completion queue */ cq_t snd_cqh; /** Receive completion queue */ cq_t rcv_cqh; }; /** * 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; } #warning "Broadcast address?" static uint8_t ib_broadcast[IB_ALEN] = { 0xff, }; /** * Transmit packet * * @v netdev Network device * @v iobuf I/O buffer * @ret rc Return status code */ static int mlx_transmit ( struct net_device *netdev, struct io_buffer *iobuf ) { struct mlx_nic *mlx = netdev->priv; ud_send_wqe_t snd_wqe; int rc; snd_wqe = alloc_send_wqe ( mlx->ipoib_qph ); if ( ! snd_wqe ) { DBGC ( mlx, "MLX %p out of TX WQEs\n", mlx ); return -ENOBUFS; } prep_send_wqe_buf ( mlx->ipoib_qph, mlx->bcast_av, snd_wqe, iobuf->data, 0, iob_len ( iobuf ), 0 ); if ( ( rc = post_send_req ( mlx->ipoib_qph, snd_wqe, 1 ) ) != 0 ) { DBGC ( mlx, "MLX %p could not post TX WQE %p: %s\n", mlx, snd_wqe, strerror ( rc ) ); free_wqe ( snd_wqe ); return rc; } return 0; } static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf, struct ib_address_vector *av, struct ib_queue_pair *qp ); static struct io_buffer *tx_ring[NUM_IPOIB_SND_WQES]; static int next_tx_idx = 0; static int mlx_transmit_direct ( struct net_device *netdev, struct io_buffer *iobuf ) { struct mlx_nic *mlx = netdev->priv; int rc; struct arbel arbel = { .uar = memfree_pci_dev.uar, .db_rec = dev_ib_data.uar_context_base, }; struct arbel_send_work_queue arbel_send_queue = { .doorbell_idx = IPOIB_SND_QP_DB_IDX, .wqe_u = ( (struct udqp_st *) mlx->ipoib_qph )->snd_wq, }; struct ib_device ibdev = { .priv = &arbel, }; struct ib_queue_pair qp = { .qpn = ib_get_qpn ( mlx->ipoib_qph ), .send = { .num_wqes = NUM_IPOIB_SND_WQES, .next_idx = next_tx_idx, .iobufs = tx_ring, .priv = &arbel_send_queue, }, }; struct ud_av_st *bcast_av = mlx->bcast_av; struct address_vector_st *bav = &bcast_av->av; struct ib_address_vector av = { .dest_qp = bcast_av->dest_qp, .qkey = bcast_av->qkey, .dlid = MLX_EXTRACT ( bav, arbelprm_ud_address_vector_st, rlid ), .rate = ( MLX_EXTRACT ( bav, arbelprm_ud_address_vector_st, max_stat_rate ) ? 1 : 4 ), .sl = MLX_EXTRACT ( bav, arbelprm_ud_address_vector_st, sl ), .gid_present = 1, }; memcpy ( &av.gid, ( ( void * ) bav ) + 16, 16 ); rc = arbel_post_send ( &ibdev, iobuf, &av, &qp ); next_tx_idx = qp.send.next_idx; return rc; } /** * Handle TX completion * * @v netdev Network device * @v ib_cqe Completion queue entry */ static void mlx_tx_complete ( struct net_device *netdev, struct ib_cqe_st *ib_cqe ) { netdev_tx_complete_next_err ( netdev, ( ib_cqe->is_error ? -EIO : 0 ) ); } /** * Handle RX completion * * @v netdev Network device * @v ib_cqe Completion queue entry */ static void mlx_rx_complete ( struct net_device *netdev, struct ib_cqe_st *ib_cqe ) { unsigned int len; struct io_buffer *iobuf; void *buf; /* Check for errors */ if ( ib_cqe->is_error ) { netdev_rx_err ( netdev, NULL, -EIO ); return; } /* Allocate I/O buffer */ len = ( ib_cqe->count - GRH_SIZE ); iobuf = alloc_iob ( len ); if ( ! iobuf ) { netdev_rx_err ( netdev, NULL, -ENOMEM ); return; } /* Fill I/O buffer */ buf = get_rcv_wqe_buf ( ib_cqe->wqe, 1 ); memcpy ( iob_put ( iobuf, len ), buf, len ); /* Hand off to network stack */ netdev_rx ( netdev, iobuf ); } /** * Poll completion queue * * @v netdev Network device * @v cq Completion queue * @v handler Completion handler */ static void mlx_poll_cq ( struct net_device *netdev, cq_t cq, void ( * handler ) ( struct net_device *netdev, struct ib_cqe_st *ib_cqe ) ) { struct mlx_nic *mlx = netdev->priv; struct ib_cqe_st ib_cqe; uint8_t num_cqes; while ( 1 ) { /* Poll for single completion queue entry */ ib_poll_cq ( cq, &ib_cqe, &num_cqes ); /* Return if no entries in the queue */ if ( ! num_cqes ) return; DBGC ( mlx, "MLX %p cpl in %p: err %x send %x " "wqe %p count %lx\n", mlx, cq, ib_cqe.is_error, ib_cqe.is_send, ib_cqe.wqe, ib_cqe.count ); /* Handle TX/RX completion */ handler ( netdev, &ib_cqe ); /* Free associated work queue entry */ free_wqe ( ib_cqe.wqe ); } } /** * 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 */ mlx_poll_cq ( netdev, mlx->snd_cqh, mlx_tx_complete ); mlx_poll_cq ( netdev, mlx->rcv_cqh, mlx_rx_complete ); } /** * 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, #if 0 .transmit = mlx_transmit, #else .transmit = mlx_transmit_direct, #endif .poll = mlx_poll, .irq = mlx_irq, }; static struct ib_gid arbel_no_gid = { { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 2 } }; static void arbel_ring_doorbell ( struct arbel *arbel, void *db_reg, unsigned int offset ) { uint32_t *db_reg_dword = db_reg; 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 ) ); } static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf, struct ib_address_vector *av, struct ib_queue_pair *qp ) { struct arbel *arbel = ibdev->priv; struct ib_work_queue *wq = &qp->send; struct arbel_send_work_queue *arbel_wq = wq->priv; unsigned int wqe_idx_mask = ( wq->num_wqes - 1 ); struct ud_send_wqe_st *prev_wqe; struct ud_send_wqe_st *wqe; struct ib_gid *gid; size_t nds; union db_record_st *db_rec; struct send_doorbell_st db_reg; /* Allocate work queue entry */ 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_wq->wqe_u[(wq->next_idx - 1) & wqe_idx_mask].wqe_cont.wqe; wqe = &arbel_wq->wqe_u[wq->next_idx & wqe_idx_mask].wqe_cont.wqe; /* Construct work queue entry */ MLX_POPULATE_1 ( &wqe->next.next, arbelprm_wqe_segment_next_st, 1, always1, 1 ); memset ( &wqe->next.control, 0, sizeof ( wqe->next.control ) ); MLX_POPULATE_1 ( &wqe->next.control, arbelprm_wqe_segment_ctrl_send_st, 0, always1, 1 ); memset ( &wqe->udseg, 0, sizeof ( wqe->udseg ) ); MLX_POPULATE_2 ( &wqe->udseg, arbelprm_ud_address_vector_st, 0, pd, GLOBAL_PD, port_number, PXE_IB_PORT ); MLX_POPULATE_2 ( &wqe->udseg, arbelprm_ud_address_vector_st, 1, rlid, av->dlid, g, av->gid_present ); MLX_POPULATE_2 ( &wqe->udseg, arbelprm_ud_address_vector_st, 2, max_stat_rate, ( ( av->rate >= 3 ) ? 0 : 1 ), msg, 3 ); MLX_POPULATE_1 ( &wqe->udseg, arbelprm_ud_address_vector_st, 3, sl, av->sl ); gid = ( av->gid_present ? &av->gid : &arbel_no_gid ); memcpy ( ( ( ( void * ) &wqe->udseg ) + 16 ), gid, sizeof ( *gid ) ); MLX_POPULATE_1 ( &wqe->udseg, arbelprm_wqe_segment_ud_st, 8, destination_qp, av->dest_qp ); MLX_POPULATE_1 ( &wqe->udseg, arbelprm_wqe_segment_ud_st, 9, q_key, av->qkey ); wqe->mpointer[0].local_addr_l = cpu_to_be32 ( virt_to_bus ( iobuf->data ) ); // memcpy ( bus_to_virt ( be32_to_cpu ( wqe->mpointer[0].local_addr_l ) ), // iobuf->data, iob_len ( iobuf ) ); wqe->mpointer[0].byte_count = cpu_to_be32 ( iob_len ( iobuf ) ); DBG ( "Work queue entry:\n" ); DBG_HD ( wqe, sizeof ( *wqe ) ); /* Update previous work queue entry's "next" field */ nds = ( ( offsetof ( typeof ( *wqe ), mpointer ) + sizeof ( wqe->mpointer[0] ) ) >> 4 ); MLX_MODIFY ( &prev_wqe->next.next, arbelprm_wqe_segment_next_st, 0, nopcode, XDEV_NOPCODE_SEND ); MLX_POPULATE_3 ( &prev_wqe->next.next, arbelprm_wqe_segment_next_st, 1, nds, nds, f, 1, always1, 1 ); DBG ( "Previous work queue entry's next field:\n" ); DBG_HD ( &prev_wqe->next.next, sizeof ( prev_wqe->next.next ) ); /* Update doorbell record */ db_rec = &arbel->db_rec[arbel_wq->doorbell_idx]; MLX_POPULATE_1 ( db_rec, arbelprm_qp_db_record_st, 0, counter, ( ( wq->next_idx + 1 ) & 0xffff ) ); barrier(); DBG ( "Doorbell record:\n" ); DBG_HD ( db_rec, 8 ); /* Ring doorbell register */ MLX_POPULATE_4 ( &db_reg, arbelprm_send_doorbell_st, 0, nopcode, XDEV_NOPCODE_SEND, f, 1, wqe_counter, ( wq->next_idx & 0xffff ), wqe_cnt, 1 ); MLX_POPULATE_2 ( &db_reg, arbelprm_send_doorbell_st, 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; } static struct ib_device_operations arbel_ib_operations = { .post_send = arbel_post_send, }; /** * 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 ); } /** * 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 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->ipoib_qph = qph; mlx->bcast_av = ib_data.bcast_av; 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 ) ); /* Register network device */ if ( ( rc = register_netdev ( netdev ) ) != 0 ) goto err_register_netdev; return 0; err_register_netdev: err_ipoib_init: ib_driver_close ( 0 ); netdev_nullify ( netdev ); netdev_put ( netdev ); return rc; } 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, };