mirror of
https://github.com/xcat2/xNBA.git
synced 2024-12-14 23:31:39 +00:00
Direct polling of TX completion queue now works.
This commit is contained in:
Michael Brown
parent
687afdcdd9
commit
8deef093d9
@ -1,6 +1,26 @@
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#ifndef _ARBEL_H
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#define _ARBEL_H
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/** @file
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*
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* Mellanox Arbel Infiniband HCA driver
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*
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*/
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/*
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* Hardware constants
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*
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*/
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#define ARBEL_OPCODE_SEND 0x0a
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#define ARBEL_OPCODE_RECV_ERROR 0xfe
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#define ARBEL_OPCODE_SEND_ERROR 0xff
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/*
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* Wrapper structures for hardware datatypes
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*
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*/
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struct MLX_DECLARE_STRUCT ( arbelprm_completion_queue_entry );
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struct MLX_DECLARE_STRUCT ( arbelprm_completion_with_error );
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struct MLX_DECLARE_STRUCT ( arbelprm_cq_ci_db_record );
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@ -12,6 +32,11 @@ struct MLX_DECLARE_STRUCT ( arbelprm_wqe_segment_data_ptr );
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struct MLX_DECLARE_STRUCT ( arbelprm_wqe_segment_next );
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struct MLX_DECLARE_STRUCT ( arbelprm_wqe_segment_ud );
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/*
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* Composite hardware datatypes
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*
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*/
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#define ARBELPRM_MAX_GATHER 1
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struct arbelprm_ud_send_wqe {
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@ -36,4 +61,58 @@ union arbelprm_doorbell_register {
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uint32_t dword[2];
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} __attribute__ (( packed ));
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/*
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* gPXE-specific definitions
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*
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*/
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/** Alignment of Arbel send work queue entries */
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#define ARBEL_SEND_WQE_ALIGN 128
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/** An Arbel send work queue entry */
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union arbel_send_wqe {
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struct arbelprm_ud_send_wqe ud;
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uint8_t force_align[ARBEL_SEND_WQE_ALIGN];
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} __attribute__ (( packed ));
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/** An Arbel send work queue */
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struct arbel_send_work_queue {
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/** Doorbell record number */
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unsigned int doorbell_idx;
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/** Work queue entries */
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union arbel_send_wqe *wqe;
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};
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/** Alignment of Arbel receive work queue entries */
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#define ARBEL_RECV_WQE_ALIGN 64
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/** An Arbel receive work queue entry */
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union arbel_recv_wqe {
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uint8_t force_align[ARBEL_RECV_WQE_ALIGN];
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} __attribute__ (( packed ));
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/** An Arbel receive work queue */
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struct arbel_recv_work_queue {
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/** Doorbell record number */
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unsigned int doorbell_idx;
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/** Work queue entries */
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union arbel_recv_wqe *wqe;
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};
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/** An Arbel completion queue */
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struct arbel_completion_queue {
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/** Doorbell record number */
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unsigned int doorbell_idx;
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/** Completion queue entries */
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union arbelprm_completion_entry *cqe;
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};
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/** An Arbel device */
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struct arbel {
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/** User Access Region */
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void *uar;
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/** Doorbell records */
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union arbelprm_doorbell_record *db_rec;
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};
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#endif /* _ARBEL_H */
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@ -25,28 +25,6 @@ Skeleton NIC driver for Etherboot
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#include "arbel.h"
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struct arbel_send_work_queue {
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/** Doorbell record number */
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unsigned int doorbell_idx;
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/** Work queue entries */
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// struct ud_send_wqe_st *wqe;
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union ud_send_wqe_u *wqe_u;
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};
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struct arbel_completion_queue {
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/** Doorbell record number */
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unsigned int doorbell_idx;
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/** Completion queue entries */
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union arbelprm_completion_entry *cqe;
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};
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struct arbel {
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/** User Access Region */
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void *uar;
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/** Doorbell records */
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union arbelprm_doorbell_record *db_rec;
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};
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struct mlx_nic {
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@ -119,9 +97,10 @@ static int mlx_transmit ( struct net_device *netdev,
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return 0;
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}
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static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf,
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static int arbel_post_send ( struct ib_device *ibdev,
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struct ib_queue_pair *qp,
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struct ib_address_vector *av,
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struct ib_queue_pair *qp );
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struct io_buffer *iobuf );
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static struct io_buffer *tx_ring[NUM_IPOIB_SND_WQES];
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static int next_tx_idx = 0;
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@ -137,10 +116,10 @@ static int mlx_transmit_direct ( struct net_device *netdev,
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};
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struct arbel_send_work_queue arbel_send_queue = {
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.doorbell_idx = IPOIB_SND_QP_DB_IDX,
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.wqe_u = ( (struct udqp_st *) mlx->ipoib_qph )->snd_wq,
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.wqe = ( (struct udqp_st *) mlx->ipoib_qph )->snd_wq,
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};
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struct ib_device ibdev = {
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.priv = &arbel,
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.dev_priv = &arbel,
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};
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struct ib_queue_pair qp = {
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.qpn = ib_get_qpn ( mlx->ipoib_qph ),
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@ -148,7 +127,7 @@ static int mlx_transmit_direct ( struct net_device *netdev,
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.num_wqes = NUM_IPOIB_SND_WQES,
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.next_idx = next_tx_idx,
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.iobufs = tx_ring,
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.priv = &arbel_send_queue,
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.dev_priv = &arbel_send_queue,
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},
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};
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struct ud_av_st *bcast_av = mlx->bcast_av;
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@ -164,7 +143,7 @@ static int mlx_transmit_direct ( struct net_device *netdev,
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};
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memcpy ( &av.gid, ( ( void * ) bav ) + 16, 16 );
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rc = arbel_post_send ( &ibdev, iobuf, &av, &qp );
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rc = arbel_post_send ( &ibdev, &qp, &av, iobuf );
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next_tx_idx = qp.send.next_idx;
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@ -172,6 +151,75 @@ static int mlx_transmit_direct ( struct net_device *netdev,
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}
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static void arbel_poll_cq ( struct ib_device *ibdev,
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struct ib_completion_queue *cq,
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ib_completer_t complete_send,
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ib_completer_t complete_recv );
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static void temp_complete_send ( struct ib_device *ibdev __unused,
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struct ib_queue_pair *qp,
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struct ib_completion *completion,
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struct io_buffer *iobuf ) {
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struct net_device *netdev = qp->priv;
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DBG ( "Wahey! TX completion\n" );
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netdev_tx_complete_err ( netdev, iobuf,
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( completion->syndrome ? -EIO : 0 ) );
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}
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static void temp_complete_recv ( struct ib_device *ibdev __unused,
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struct ib_queue_pair *qp __unused,
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struct ib_completion *completion __unused,
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struct io_buffer *iobuf __unused ) {
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DBG ( "AARGH! recv completion\n" );
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}
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static int next_cq_idx = 0;
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static void mlx_poll_cq_direct ( struct net_device *netdev ) {
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struct mlx_nic *mlx = netdev->priv;
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struct arbel arbel = {
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.uar = memfree_pci_dev.uar,
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.db_rec = dev_ib_data.uar_context_base,
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};
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struct arbel_send_work_queue arbel_send_queue = {
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.doorbell_idx = IPOIB_SND_QP_DB_IDX,
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.wqe = ( ( struct udqp_st * ) mlx->ipoib_qph )->snd_wq,
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};
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struct ib_device ibdev = {
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.dev_priv = &arbel,
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};
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struct ib_queue_pair qp = {
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.qpn = ib_get_qpn ( mlx->ipoib_qph ),
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.send = {
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.num_wqes = NUM_IPOIB_SND_WQES,
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.next_idx = next_tx_idx,
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.iobufs = tx_ring,
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.dev_priv = &arbel_send_queue,
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},
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.priv = netdev,
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};
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struct arbel_completion_queue arbel_cq = {
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.doorbell_idx = IPOIB_SND_CQ_CI_DB_IDX,
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.cqe = ( ( struct cq_st * ) mlx->snd_cqh )->cq_buf,
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};
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struct ib_completion_queue cq = {
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.cqn = 1234,
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.num_cqes = NUM_IPOIB_SND_CQES,
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.next_idx = next_cq_idx,
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.dev_priv = &arbel_cq,
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};
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INIT_LIST_HEAD ( &cq.queue_pairs );
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INIT_LIST_HEAD ( &qp.list );
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list_add ( &qp.list, &cq.queue_pairs );
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arbel_poll_cq ( &ibdev, &cq, temp_complete_send, temp_complete_recv );
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next_cq_idx = cq.next_idx;
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}
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/**
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* Handle TX completion
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*
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@ -276,7 +324,11 @@ static void mlx_poll ( struct net_device *netdev ) {
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}
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/* Poll completion queues */
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#if 0
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mlx_poll_cq ( netdev, mlx->snd_cqh, mlx_tx_complete );
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#else
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mlx_poll_cq_direct ( netdev );
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#endif
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mlx_poll_cq ( netdev, mlx->rcv_cqh, mlx_rx_complete );
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}
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@ -336,17 +388,18 @@ static void arbel_ring_doorbell ( struct arbel *arbel,
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* Post send work queue entry
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*
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* @v ibdev Infiniband device
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* @v iobuf I/O buffer
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* @v av Address vector
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* @v qp Queue pair
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* @v av Address vector
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* @v iobuf I/O buffer
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* @ret rc Return status code
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*/
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static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf,
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static int arbel_post_send ( struct ib_device *ibdev,
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struct ib_queue_pair *qp,
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struct ib_address_vector *av,
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struct ib_queue_pair *qp ) {
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struct arbel *arbel = ibdev->priv;
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struct io_buffer *iobuf ) {
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struct arbel *arbel = ibdev->dev_priv;
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struct ib_work_queue *wq = &qp->send;
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struct arbel_send_work_queue *arbel_wq = wq->priv;
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struct arbel_send_work_queue *arbel_send_wq = wq->dev_priv;
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struct arbelprm_ud_send_wqe *prev_wqe;
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struct arbelprm_ud_send_wqe *wqe;
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union arbelprm_doorbell_record *db_rec;
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@ -358,12 +411,12 @@ static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf,
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/* Allocate work queue entry */
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wqe_idx_mask = ( wq->num_wqes - 1 );
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if ( wq->iobufs[wq->next_idx & wqe_idx_mask] ) {
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DBGC ( arbel, "ARBEL %p send queue full", arbel );
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DBGC ( arbel, "Arbel %p send queue full", arbel );
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return -ENOBUFS;
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}
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wq->iobufs[wq->next_idx & wqe_idx_mask] = iobuf;
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prev_wqe = &arbel_wq->wqe_u[(wq->next_idx - 1) & wqe_idx_mask].wqe_cont.wqe;
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wqe = &arbel_wq->wqe_u[wq->next_idx & wqe_idx_mask].wqe_cont.wqe;
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prev_wqe = &arbel_send_wq->wqe[(wq->next_idx - 1) & wqe_idx_mask].ud;
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wqe = &arbel_send_wq->wqe[wq->next_idx & wqe_idx_mask].ud;
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/* Construct work queue entry */
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MLX_FILL_1 ( &wqe->next, 1, always1, 1 );
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@ -395,7 +448,7 @@ static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf,
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/* Update previous work queue entry's "next" field */
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nds = ( ( offsetof ( typeof ( *wqe ), data ) +
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sizeof ( wqe->data[0] ) ) >> 4 );
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MLX_SET ( &prev_wqe->next, nopcode, XDEV_NOPCODE_SEND );
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MLX_SET ( &prev_wqe->next, nopcode, ARBEL_OPCODE_SEND );
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MLX_FILL_3 ( &prev_wqe->next, 1,
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nds, nds,
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f, 1,
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@ -405,7 +458,7 @@ static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf,
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DBG_HD ( &prev_wqe->next, sizeof ( prev_wqe->next ) );
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/* Update doorbell record */
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db_rec = &arbel->db_rec[arbel_wq->doorbell_idx];
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db_rec = &arbel->db_rec[arbel_send_wq->doorbell_idx];
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MLX_FILL_1 ( &db_rec->qp, 0,
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counter, ( ( wq->next_idx + 1 ) & 0xffff ) );
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barrier();
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@ -414,7 +467,7 @@ static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf,
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/* Ring doorbell register */
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MLX_FILL_4 ( &db_reg.send, 0,
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nopcode, XDEV_NOPCODE_SEND,
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nopcode, ARBEL_OPCODE_SEND,
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f, 1,
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wqe_counter, ( wq->next_idx & 0xffff ),
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wqe_cnt, 1 );
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@ -429,50 +482,126 @@ static int arbel_post_send ( struct ib_device *ibdev, struct io_buffer *iobuf,
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return 0;
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}
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static void arbel_parse_completion ( struct arbel *arbel,
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union arbelprm_completion_entry *cqe,
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struct ib_completion *completion ) {
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memset ( completion, 0, sizeof ( *completion ) );
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completion->is_send = MLX_GET ( &cqe->normal, s );
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completion->len = MLX_GET ( &cqe->normal, byte_cnt );
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}
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/**
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* Handle completion
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*
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* @v ibdev Infiniband device
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* @v cq Completion queue
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* @v cqe Hardware completion queue entry
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* @v complete_send Send completion handler
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* @v complete_recv Receive completion handler
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* @ret rc Return status code
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*/
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static int arbel_complete ( struct ib_device *ibdev,
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struct ib_completion_queue *cq,
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union arbelprm_completion_entry *cqe,
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ib_completer_t complete_send,
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ib_completer_t complete_recv ) {
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struct arbel *arbel = ibdev->dev_priv;
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struct ib_completion completion;
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struct ib_queue_pair *qp;
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struct ib_work_queue *wq;
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struct io_buffer *iobuf;
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struct arbel_send_work_queue *arbel_send_wq;
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struct arbel_recv_work_queue *arbel_recv_wq;
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ib_completer_t complete;
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unsigned int opcode;
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unsigned long qpn;
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unsigned int is_send;
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unsigned long wqe_adr;
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unsigned int wqe_idx;
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int rc = 0;
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/* Parse completion */
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memset ( &completion, 0, sizeof ( completion ) );
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completion.len = MLX_GET ( &cqe->normal, byte_cnt );
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qpn = MLX_GET ( &cqe->normal, my_qpn );
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is_send = MLX_GET ( &cqe->normal, s );
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wqe_adr = ( MLX_GET ( &cqe->normal, wqe_adr ) << 6 );
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opcode = MLX_GET ( &cqe->normal, opcode );
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if ( opcode >= ARBEL_OPCODE_RECV_ERROR ) {
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/* "s" field is not valid for error opcodes */
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is_send = ( opcode == ARBEL_OPCODE_SEND_ERROR );
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completion.syndrome = MLX_GET ( &cqe->error, syndrome );
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DBGC ( arbel, "Arbel %p CPN %lx syndrome %x vendor %lx\n",
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arbel, cq->cqn, completion.syndrome,
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MLX_GET ( &cqe->error, vendor_code ) );
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rc = -EIO;
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/* Don't return immediately; propagate error to completer */
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}
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/* Identify queue pair */
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qp = ib_find_qp ( &cq->queue_pairs, qpn );
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if ( ! qp ) {
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DBGC ( arbel, "Arbel %p CQN %lx unknown QPN %lx\n",
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arbel, cq->cqn, qpn );
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return -EIO;
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}
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/* Identify work queue entry index */
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if ( is_send ) {
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wq = &qp->send;
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arbel_send_wq = wq->dev_priv;
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wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_send_wq->wqe ) ) /
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sizeof ( arbel_send_wq->wqe[0] ) );
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} else {
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wq = &qp->recv;
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arbel_recv_wq = wq->dev_priv;
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wqe_idx = ( ( wqe_adr - virt_to_bus ( arbel_recv_wq->wqe ) ) /
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sizeof ( arbel_recv_wq->wqe[0] ) );
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}
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/* Identify I/O buffer */
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iobuf = wq->iobufs[wqe_idx];
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if ( ! iobuf ) {
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DBGC ( arbel, "Arbel %p CQN %lx QPN %lx empty WQE %x\n",
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arbel, cq->cqn, qpn, wqe_idx );
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return -EIO;
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}
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wq->iobufs[wqe_idx] = NULL;
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/* Pass off to caller's completion handler */
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complete = ( is_send ? complete_send : complete_recv );
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complete ( ibdev, qp, &completion, iobuf );
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return rc;
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}
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/**
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||||
* Poll completion queue
|
||||
*
|
||||
* @v ibdev Infiniband device
|
||||
* @v cq Completion queue
|
||||
* @v complete Completion handler
|
||||
* @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->priv;
|
||||
struct arbel_completion_queue *arbel_cq = cq->priv;
|
||||
unsigned int cqe_idx_mask = ( cq->num_cqes - 1 );
|
||||
struct arbel *arbel = ibdev->dev_priv;
|
||||
struct arbel_completion_queue *arbel_cq = cq->dev_priv;
|
||||
union arbelprm_doorbell_record *db_rec;
|
||||
union arbelprm_completion_entry *cqe;
|
||||
struct ib_completion completion;
|
||||
struct io_buffer *iobuf;
|
||||
int is_send;
|
||||
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;
|
||||
}
|
||||
|
||||
/* Parse completion */
|
||||
|
||||
|
||||
|
||||
/* Handle completion */
|
||||
( is_send ? complete_send : complete_recv ) ( ibdev,
|
||||
&completion,
|
||||
iobuf );
|
||||
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 );
|
||||
|
||||
@ -79,24 +79,30 @@ struct ib_work_queue {
|
||||
unsigned long next_idx;
|
||||
/** I/O buffers assigned to work queue */
|
||||
struct io_buffer **iobufs;
|
||||
/** Driver private data */
|
||||
void *priv;
|
||||
/** Device private data */
|
||||
void *dev_priv;
|
||||
};
|
||||
|
||||
/** An Infiniband Queue Pair */
|
||||
struct ib_queue_pair {
|
||||
/** List of queue pairs sharing a completion queue */
|
||||
struct list_head list;
|
||||
/** Queue Pair Number */
|
||||
uint32_t qpn;
|
||||
unsigned long qpn;
|
||||
/** Send queue */
|
||||
struct ib_work_queue send;
|
||||
/** Receive queue */
|
||||
struct ib_work_queue recv;
|
||||
/** Driver private data */
|
||||
/** Queue owner private data */
|
||||
void *priv;
|
||||
/** Device private data */
|
||||
void *dev_priv;
|
||||
};
|
||||
|
||||
/** An Infiniband Completion Queue */
|
||||
struct ib_completion_queue {
|
||||
/** Completion queue number */
|
||||
unsigned long cqn;
|
||||
/** Number of completion queue entries */
|
||||
unsigned int num_cqes;
|
||||
/** Next completion queue entry index
|
||||
@ -107,14 +113,19 @@ struct ib_completion_queue {
|
||||
* array index.
|
||||
*/
|
||||
unsigned long next_idx;
|
||||
/** Driver private data */
|
||||
void *priv;
|
||||
/** List of associated queue pairs */
|
||||
struct list_head queue_pairs;
|
||||
/** Device private data */
|
||||
void *dev_priv;
|
||||
};
|
||||
|
||||
/** An Infiniband completion */
|
||||
struct ib_completion {
|
||||
/** Completion is for send queue */
|
||||
int is_send;
|
||||
/** Syndrome
|
||||
*
|
||||
* If non-zero, then the completion is in error.
|
||||
*/
|
||||
unsigned int syndrome;
|
||||
/** Length */
|
||||
size_t len;
|
||||
};
|
||||
@ -122,10 +133,12 @@ struct ib_completion {
|
||||
/** An Infiniband completion handler
|
||||
*
|
||||
* @v ibdev Infiniband device
|
||||
* @v qp Queue pair
|
||||
* @v completion Completion
|
||||
* @v iobuf I/O buffer
|
||||
*/
|
||||
typedef void ( * ib_completer_t ) ( struct ib_device *ibdev,
|
||||
struct ib_queue_pair *qp,
|
||||
struct ib_completion *completion,
|
||||
struct io_buffer *iobuf );
|
||||
|
||||
@ -156,9 +169,9 @@ struct ib_device_operations {
|
||||
/** Post send work queue entry
|
||||
*
|
||||
* @v ibdev Infiniband device
|
||||
* @v iobuf I/O buffer
|
||||
* @v av Address vector
|
||||
* @v qp Queue pair
|
||||
* @v av Address vector
|
||||
* @v iobuf I/O buffer
|
||||
* @ret rc Return status code
|
||||
*
|
||||
* If this method returns success, the I/O buffer remains
|
||||
@ -167,9 +180,9 @@ struct ib_device_operations {
|
||||
* interpreted as "failure to enqueue buffer".
|
||||
*/
|
||||
int ( * post_send ) ( struct ib_device *ibdev,
|
||||
struct io_buffer *iobuf,
|
||||
struct ib_queue_pair *qp,
|
||||
struct ib_address_vector *av,
|
||||
struct ib_queue_pair *qp );
|
||||
struct io_buffer *iobuf );
|
||||
/** Poll completion queue
|
||||
*
|
||||
* @v ibdev Infiniband device
|
||||
@ -187,11 +200,14 @@ struct ib_device_operations {
|
||||
|
||||
/** An Infiniband device */
|
||||
struct ib_device {
|
||||
/** Driver private data */
|
||||
void *priv;
|
||||
/** Device private data */
|
||||
void *dev_priv;
|
||||
};
|
||||
|
||||
|
||||
extern struct ib_queue_pair * ib_find_qp ( struct list_head *list,
|
||||
unsigned long qpn );
|
||||
|
||||
|
||||
|
||||
extern struct ll_protocol infiniband_protocol;
|
||||
|
||||
@ -33,6 +33,26 @@
|
||||
*
|
||||
*/
|
||||
|
||||
/**
|
||||
* Find queue pair from a list
|
||||
*
|
||||
* @v list List of queue pairs
|
||||
* @v qpn Queue pair number
|
||||
* @ret qp Queue pair, or NULL if not found
|
||||
*/
|
||||
struct ib_queue_pair * ib_find_qp ( struct list_head *list,
|
||||
unsigned long qpn ) {
|
||||
struct ib_queue_pair *qp;
|
||||
|
||||
list_for_each_entry ( qp, list, list ) {
|
||||
if ( qp->qpn == qpn )
|
||||
return qp;
|
||||
}
|
||||
return NULL;
|
||||
}
|
||||
|
||||
|
||||
|
||||
/** Infiniband broadcast MAC address */
|
||||
static uint8_t ib_broadcast[IB_ALEN] = { 0xff, };
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user