staging: lustre: ko2iblnd: Adapt to the removal of ib_get_dma_mr()
In Linux kernel 4.9-rc1, the function ib_get_dma_mr() was removed and a second parameter was added to ib_alloc_pd(). As this broke the building of the ko2iblnd module in staging, the Kconfig for LNet has marked ko2iblnd as broken and stopped building it. This patch fixes this breakage by: - Removing the BROKEN tag from lnet/Kconfig. - Make it so the module parameter map_on_demand can no longer be zero (we have to configure FMR/FastReg pools; it can no longer be off). - No longer try to use the global DMA memory region, but make use of the FMR/FastReg pool for all RDMA Tx operations. - Everywhere we are using the device DMA mr to derive the L-key for non-registered memory regions, use the pd->local_dma_lkey value instead. - Make the default map_on_demand = 256. This will allow nodes with this patch to still connected to older nodes without this patch and FMR/FastReg turned off. When FMR/FastReg is turned off, we use 256 as the max frags so the two sides will still be able to communicate and work. - Fix a mistake with BUILD_BUG_ON calls in o2iblnd.c which caused compiling to fail. Signed-off-by: Doug Oucharek <doug.s.oucharek@intel.com> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-9026 Reviewed-on: https://review.whamcloud.com/#/c/24931/ Reviewed-by: James Simmons <uja.ornl@yahoo.com> Reviewed-by: James Simmons <jsimmons@infradead.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>hifive-unleashed-5.1
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@ -35,7 +35,6 @@ config LNET_SELFTEST
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config LNET_XPRT_IB
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tristate "LNET infiniband support"
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depends on LNET && INFINIBAND && INFINIBAND_ADDR_TRANS
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depends on BROKEN
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default LNET && INFINIBAND
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help
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This option allows the LNET users to use infiniband as an
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@ -1281,27 +1281,6 @@ static void kiblnd_map_tx_pool(struct kib_tx_pool *tpo)
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}
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}
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struct ib_mr *kiblnd_find_rd_dma_mr(struct lnet_ni *ni, struct kib_rdma_desc *rd,
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int negotiated_nfrags)
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{
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struct kib_net *net = ni->ni_data;
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struct kib_hca_dev *hdev = net->ibn_dev->ibd_hdev;
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struct lnet_ioctl_config_o2iblnd_tunables *tunables;
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__u16 nfrags;
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int mod;
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tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib;
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mod = tunables->lnd_map_on_demand;
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nfrags = (negotiated_nfrags != -1) ? negotiated_nfrags : mod;
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LASSERT(hdev->ibh_mrs);
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if (mod > 0 && nfrags <= rd->rd_nfrags)
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return NULL;
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return hdev->ibh_mrs;
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}
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static void kiblnd_destroy_fmr_pool(struct kib_fmr_pool *fpo)
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{
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LASSERT(!fpo->fpo_map_count);
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@ -2168,21 +2147,12 @@ static int kiblnd_net_init_pools(struct kib_net *net, lnet_ni_t *ni, __u32 *cpts
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int ncpts)
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{
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struct lnet_ioctl_config_o2iblnd_tunables *tunables;
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unsigned long flags;
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int cpt;
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int rc;
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int i;
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tunables = &ni->ni_lnd_tunables->lt_tun_u.lt_o2ib;
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read_lock_irqsave(&kiblnd_data.kib_global_lock, flags);
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if (!tunables->lnd_map_on_demand) {
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read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
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goto create_tx_pool;
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}
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read_unlock_irqrestore(&kiblnd_data.kib_global_lock, flags);
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if (tunables->lnd_fmr_pool_size < *kiblnd_tunables.kib_ntx / 4) {
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CERROR("Can't set fmr pool size (%d) < ntx / 4(%d)\n",
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tunables->lnd_fmr_pool_size,
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@ -2227,7 +2197,6 @@ static int kiblnd_net_init_pools(struct kib_net *net, lnet_ni_t *ni, __u32 *cpts
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if (i > 0)
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LASSERT(i == ncpts);
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create_tx_pool:
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/*
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* cfs_precpt_alloc is creating an array of struct kib_tx_poolset
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* The number of struct kib_tx_poolsets create is equal to the
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@ -2283,20 +2252,8 @@ static int kiblnd_hdev_get_attr(struct kib_hca_dev *hdev)
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return -EINVAL;
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}
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static void kiblnd_hdev_cleanup_mrs(struct kib_hca_dev *hdev)
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{
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if (!hdev->ibh_mrs)
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return;
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ib_dereg_mr(hdev->ibh_mrs);
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hdev->ibh_mrs = NULL;
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}
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void kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
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{
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kiblnd_hdev_cleanup_mrs(hdev);
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if (hdev->ibh_pd)
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ib_dealloc_pd(hdev->ibh_pd);
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@ -2306,28 +2263,6 @@ void kiblnd_hdev_destroy(struct kib_hca_dev *hdev)
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LIBCFS_FREE(hdev, sizeof(*hdev));
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}
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static int kiblnd_hdev_setup_mrs(struct kib_hca_dev *hdev)
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{
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struct ib_mr *mr;
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int rc;
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int acflags = IB_ACCESS_LOCAL_WRITE | IB_ACCESS_REMOTE_WRITE;
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rc = kiblnd_hdev_get_attr(hdev);
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if (rc)
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return rc;
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mr = ib_get_dma_mr(hdev->ibh_pd, acflags);
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if (IS_ERR(mr)) {
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CERROR("Failed ib_get_dma_mr : %ld\n", PTR_ERR(mr));
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kiblnd_hdev_cleanup_mrs(hdev);
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return PTR_ERR(mr);
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}
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hdev->ibh_mrs = mr;
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return 0;
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}
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/* DUMMY */
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static int kiblnd_dummy_callback(struct rdma_cm_id *cmid,
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struct rdma_cm_event *event)
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@ -2482,9 +2417,9 @@ int kiblnd_dev_failover(struct kib_dev *dev)
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goto out;
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}
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rc = kiblnd_hdev_setup_mrs(hdev);
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rc = kiblnd_hdev_get_attr(hdev);
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if (rc) {
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CERROR("Can't setup device: %d\n", rc);
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CERROR("Can't get device attributes: %d\n", rc);
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goto out;
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}
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@ -3021,12 +2956,12 @@ static void __exit ko2iblnd_exit(void)
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static int __init ko2iblnd_init(void)
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{
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BUILD_BUG_ON(sizeof(struct kib_msg) > IBLND_MSG_SIZE);
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BUILD_BUG_ON(!offsetof(struct kib_msg,
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BUILD_BUG_ON(offsetof(struct kib_msg,
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ibm_u.get.ibgm_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
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<= IBLND_MSG_SIZE);
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BUILD_BUG_ON(!offsetof(struct kib_msg,
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> IBLND_MSG_SIZE);
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BUILD_BUG_ON(offsetof(struct kib_msg,
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ibm_u.putack.ibpam_rd.rd_frags[IBLND_MAX_RDMA_FRAGS])
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<= IBLND_MSG_SIZE);
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> IBLND_MSG_SIZE);
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kiblnd_tunables_init();
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@ -172,7 +172,6 @@ struct kib_hca_dev {
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__u64 ibh_page_mask; /* page mask of current HCA */
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int ibh_mr_shift; /* bits shift of max MR size */
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__u64 ibh_mr_size; /* size of MR */
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struct ib_mr *ibh_mrs; /* global MR */
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struct ib_pd *ibh_pd; /* PD */
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struct kib_dev *ibh_dev; /* owner */
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atomic_t ibh_ref; /* refcount */
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@ -978,8 +977,6 @@ static inline unsigned int kiblnd_sg_dma_len(struct ib_device *dev,
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#define KIBLND_CONN_PARAM(e) ((e)->param.conn.private_data)
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#define KIBLND_CONN_PARAM_LEN(e) ((e)->param.conn.private_data_len)
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struct ib_mr *kiblnd_find_rd_dma_mr(struct lnet_ni *ni, struct kib_rdma_desc *rd,
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int negotiated_nfrags);
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void kiblnd_map_rx_descs(struct kib_conn *conn);
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void kiblnd_unmap_rx_descs(struct kib_conn *conn);
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void kiblnd_pool_free_node(struct kib_pool *pool, struct list_head *node);
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@ -157,7 +157,6 @@ kiblnd_post_rx(struct kib_rx *rx, int credit)
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struct kib_conn *conn = rx->rx_conn;
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struct kib_net *net = conn->ibc_peer->ibp_ni->ni_data;
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struct ib_recv_wr *bad_wrq = NULL;
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struct ib_mr *mr = conn->ibc_hdev->ibh_mrs;
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int rc;
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LASSERT(net);
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@ -165,9 +164,8 @@ kiblnd_post_rx(struct kib_rx *rx, int credit)
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LASSERT(credit == IBLND_POSTRX_NO_CREDIT ||
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credit == IBLND_POSTRX_PEER_CREDIT ||
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credit == IBLND_POSTRX_RSRVD_CREDIT);
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LASSERT(mr);
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rx->rx_sge.lkey = mr->lkey;
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rx->rx_sge.lkey = conn->ibc_hdev->ibh_pd->local_dma_lkey;
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rx->rx_sge.addr = rx->rx_msgaddr;
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rx->rx_sge.length = IBLND_MSG_SIZE;
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@ -613,7 +611,6 @@ static int kiblnd_map_tx(lnet_ni_t *ni, struct kib_tx *tx, struct kib_rdma_desc
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{
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struct kib_net *net = ni->ni_data;
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struct kib_hca_dev *hdev = net->ibn_dev->ibd_hdev;
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struct ib_mr *mr = NULL;
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__u32 nob;
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int i;
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@ -635,14 +632,6 @@ static int kiblnd_map_tx(lnet_ni_t *ni, struct kib_tx *tx, struct kib_rdma_desc
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nob += rd->rd_frags[i].rf_nob;
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}
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mr = kiblnd_find_rd_dma_mr(ni, rd, tx->tx_conn ?
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tx->tx_conn->ibc_max_frags : -1);
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if (mr) {
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/* found pre-mapping MR */
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rd->rd_key = (rd != tx->tx_rd) ? mr->rkey : mr->lkey;
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return 0;
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}
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if (net->ibn_fmr_ps)
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return kiblnd_fmr_map_tx(net, tx, rd, nob);
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struct ib_sge *sge = &tx->tx_sge[tx->tx_nwrq];
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struct ib_rdma_wr *wrq = &tx->tx_wrq[tx->tx_nwrq];
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int nob = offsetof(struct kib_msg, ibm_u) + body_nob;
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struct ib_mr *mr = hdev->ibh_mrs;
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LASSERT(tx->tx_nwrq >= 0);
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LASSERT(tx->tx_nwrq < IBLND_MAX_RDMA_FRAGS + 1);
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LASSERT(nob <= IBLND_MSG_SIZE);
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LASSERT(mr);
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kiblnd_init_msg(tx->tx_msg, type, body_nob);
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sge->lkey = mr->lkey;
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sge->lkey = hdev->ibh_pd->local_dma_lkey;
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sge->addr = tx->tx_msgaddr;
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sge->length = nob;
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@ -106,7 +106,8 @@ static int concurrent_sends;
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module_param(concurrent_sends, int, 0444);
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MODULE_PARM_DESC(concurrent_sends, "send work-queue sizing");
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static int map_on_demand;
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#define IBLND_DEFAULT_MAP_ON_DEMAND IBLND_MAX_RDMA_FRAGS
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static int map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
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module_param(map_on_demand, int, 0444);
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MODULE_PARM_DESC(map_on_demand, "map on demand");
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if (tunables->lnd_peercredits_hiw >= ni->ni_peertxcredits)
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tunables->lnd_peercredits_hiw = ni->ni_peertxcredits - 1;
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if (tunables->lnd_map_on_demand < 0 ||
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if (tunables->lnd_map_on_demand <= 0 ||
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tunables->lnd_map_on_demand > IBLND_MAX_RDMA_FRAGS) {
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/* disable map-on-demand */
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tunables->lnd_map_on_demand = 0;
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/* Use the default */
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CWARN("Invalid map_on_demand (%d), expects 1 - %d. Using default of %d\n",
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tunables->lnd_map_on_demand,
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IBLND_MAX_RDMA_FRAGS, IBLND_DEFAULT_MAP_ON_DEMAND);
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tunables->lnd_map_on_demand = IBLND_DEFAULT_MAP_ON_DEMAND;
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}
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if (tunables->lnd_map_on_demand == 1) {
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