diff options
Diffstat (limited to 'drivers/net/ethernet/marvell/octeontx2/nic/otx2_smqvf.c')
| -rw-r--r-- | drivers/net/ethernet/marvell/octeontx2/nic/otx2_smqvf.c | 291 |
1 files changed, 291 insertions, 0 deletions
diff --git a/drivers/net/ethernet/marvell/octeontx2/nic/otx2_smqvf.c b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_smqvf.c new file mode 100644 index 000000000000..9ebe6650a8dd --- /dev/null +++ b/drivers/net/ethernet/marvell/octeontx2/nic/otx2_smqvf.c @@ -0,0 +1,291 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Marvell OcteonTx2 RVU Virtual Function ethernet driver + * + * Copyright (C) 2019 Marvell International Ltd. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/module.h> +#include <linux/etherdevice.h> +#include <linux/pci.h> + +#include "otx2_common.h" +#include "otx2_reg.h" +#include "otx2_struct.h" +#include "rvu_fixes.h" + +/* serialize device removal and xmit */ +DEFINE_MUTEX(remove_lock); + +static char pkt_data[64] = { 0x00, 0x0f, 0xb7, 0x11, 0xa6, 0x87, 0x02, 0xe0, + 0x28, 0xa5, 0xf6, 0x00, 0x08, 0x00, 0x45, 0x00, + 0x00, 0x32, 0x00, 0x00, 0x00, 0x00, 0x04, 0x11, + 0xee, 0x53, 0x50, 0x50, 0x50, 0x02, 0x14, 0x14, + 0x14, 0x02, 0x10, 0x00, 0x10, 0x01, 0x00, 0x1e, + 0x00, 0x00, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, + 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, + 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76 }; + +static struct sk_buff *the_skb; +static struct otx2_nic *the_smqvf; +static u16 drop_entry = 0xFFFF; + +static bool is_otx2_smqvf(struct otx2_nic *vf) +{ + if (vf->pcifunc == RVU_SMQVF_PCIFUNC && + (is_96xx_A0(vf->pdev) || is_95xx_A0(vf->pdev))) + return true; + + return false; +} + +/* Flush SQE written to LMT to SQB */ +static u64 otx2_lmt_flush(uint64_t addr) +{ + return atomic64_fetch_xor_relaxed(0, (atomic64_t *)addr); +} + +static void otx2_sqe_flush(struct otx2_snd_queue *sq, int size) +{ + u64 status; + + /* Packet data stores should finish before SQE is flushed to HW */ + dma_wmb(); + + do { + memcpy(sq->lmt_addr, sq->sqe_base, size); + status = otx2_lmt_flush(sq->io_addr); + } while (status == 0); + + sq->head++; + sq->head &= (sq->sqe_cnt - 1); +} + +static int otx2_ctx_update(struct otx2_nic *vf, u16 qidx) +{ + struct nix_aq_enq_req *sq_aq, *rq_aq, *cq_aq; + + /* Do not link CQ for SQ and disable RQ, CQ */ + sq_aq = otx2_mbox_alloc_msg_nix_aq_enq(&vf->mbox); + if (!sq_aq) + return -ENOMEM; + + sq_aq->sq.cq_ena = 0; + sq_aq->sq_mask.cq_ena = 1; + sq_aq->qidx = qidx; + sq_aq->ctype = NIX_AQ_CTYPE_SQ; + sq_aq->op = NIX_AQ_INSTOP_WRITE; + + rq_aq = otx2_mbox_alloc_msg_nix_aq_enq(&vf->mbox); + if (!rq_aq) + return -ENOMEM; + + rq_aq->rq.ena = 0; + rq_aq->rq_mask.ena = 1; + rq_aq->qidx = qidx; + rq_aq->ctype = NIX_AQ_CTYPE_RQ; + rq_aq->op = NIX_AQ_INSTOP_WRITE; + + cq_aq = otx2_mbox_alloc_msg_nix_aq_enq(&vf->mbox); + if (!cq_aq) + return -ENOMEM; + + cq_aq->cq.ena = 0; + cq_aq->cq_mask.ena = 1; + cq_aq->qidx = qidx; + cq_aq->ctype = NIX_AQ_CTYPE_CQ; + cq_aq->op = NIX_AQ_INSTOP_WRITE; + + return otx2_sync_mbox_msg(&vf->mbox); +} + +void otx2smqvf_xmit(void) +{ + struct otx2_snd_queue *sq; + int i, size; + + mutex_lock(&remove_lock); + + if (!the_smqvf) { + mutex_unlock(&remove_lock); + return; + } + + sq = &the_smqvf->qset.sq[0]; + /* Min. set of send descriptors required to send packets */ + size = sizeof(struct nix_sqe_hdr_s) + sizeof(struct nix_sqe_sg_s) + + sizeof(struct nix_sqe_ext_s) + sizeof(u64); + + for (i = 0; i < 256; i++) + otx2_sqe_flush(sq, size); + + mutex_unlock(&remove_lock); +} +EXPORT_SYMBOL(otx2smqvf_xmit); + +static int otx2smqvf_install_flow(struct otx2_nic *vf) +{ + struct npc_mcam_alloc_entry_req *alloc_req; + struct npc_mcam_free_entry_req *free_req; + struct npc_install_flow_req *install_req; + struct npc_mcam_alloc_entry_rsp *rsp; + struct msg_req *msg; + int err, qid; + size_t size; + void *data; + + size = SKB_DATA_ALIGN(64 + OTX2_ALIGN) + NET_SKB_PAD + + SKB_DATA_ALIGN(sizeof(struct skb_shared_info)); + + err = -ENOMEM; + + data = kzalloc(size, GFP_KERNEL); + if (!data) + return err; + + memcpy(data, &pkt_data, 64); + + the_skb = build_skb(data, 0); + the_skb->len = 64; + + for (qid = 0; qid < vf->hw.tx_queues; qid++) { + err = otx2_ctx_update(vf, qid); + /* If something wrong with Q0 then treat as error */ + if (err && !qid) + goto err_free_mem; + } + + otx2_mbox_lock(&vf->mbox); + + alloc_req = otx2_mbox_alloc_msg_npc_mcam_alloc_entry(&vf->mbox); + if (!alloc_req) { + otx2_mbox_unlock(&vf->mbox); + goto err_free_mem; + } + alloc_req->count = 1; + alloc_req->contig = true; + + /* Send message to AF */ + if (otx2_sync_mbox_msg(&vf->mbox)) { + err = -EINVAL; + otx2_mbox_unlock(&vf->mbox); + goto err_free_mem; + } + otx2_mbox_unlock(&vf->mbox); + + rsp = (struct npc_mcam_alloc_entry_rsp *)otx2_mbox_get_rsp + (&vf->mbox.mbox, 0, &alloc_req->hdr); + drop_entry = rsp->entry; + + otx2_mbox_lock(&vf->mbox); + + /* Send messages to drop Tx packets at NPC and stop Rx traffic */ + install_req = otx2_mbox_alloc_msg_npc_install_flow(&vf->mbox); + if (!install_req) { + err = -ENOMEM; + otx2_mbox_unlock(&vf->mbox); + goto err_free_entry; + } + + u64_to_ether_addr(0x0ull, install_req->mask.dmac); + install_req->entry = drop_entry; + install_req->features = BIT_ULL(NPC_DMAC); + install_req->intf = NIX_INTF_TX; + install_req->op = NIX_TX_ACTIONOP_DROP; + install_req->set_cntr = 1; + + msg = otx2_mbox_alloc_msg_nix_lf_stop_rx(&vf->mbox); + if (!msg) { + otx2_mbox_unlock(&vf->mbox); + goto err_free_entry; + } + + /* Send message to AF */ + if (otx2_sync_mbox_msg(&vf->mbox)) { + err = -EINVAL; + otx2_mbox_unlock(&vf->mbox); + goto err_free_entry; + } + otx2_mbox_unlock(&vf->mbox); + + otx2_sq_append_skb(vf->netdev, &vf->qset.sq[0], the_skb, 0); + + return 0; + +err_free_entry: + otx2_mbox_lock(&vf->mbox); + free_req = otx2_mbox_alloc_msg_npc_mcam_free_entry(&vf->mbox); + if (!free_req) { + dev_err(vf->dev, "Could not allocate msg for freeing entry\n"); + } else { + free_req->entry = drop_entry; + WARN_ON(otx2_sync_mbox_msg(&vf->mbox)); + } + otx2_mbox_unlock(&vf->mbox); +err_free_mem: + kfree_skb(the_skb); + drop_entry = 0xFFFF; + return err; +} + +int otx2smqvf_probe(struct otx2_nic *vf) +{ + int err; + + if (!is_otx2_smqvf(vf)) + return -EPERM; + + err = otx2_open(vf->netdev); + if (err) + return -EINVAL; + + /* Disable QINT interrupts because we do not use a CQ for SQ and + * drop TX packets intentionally + */ + otx2_write64(vf, NIX_LF_QINTX_ENA_W1C(0), BIT_ULL(0)); + + err = otx2smqvf_install_flow(vf); + if (err) { + otx2_stop(vf->netdev); + return -EINVAL; + } + + the_smqvf = vf; + + return 0; +} + +int otx2smqvf_remove(struct otx2_nic *vf) +{ + struct npc_mcam_free_entry_req *free_req; + struct npc_delete_flow_req *del_req; + + if (!is_otx2_smqvf(vf)) + return -EPERM; + + mutex_lock(&remove_lock); + kfree_skb(the_skb); + the_smqvf = NULL; + the_skb = NULL; + mutex_unlock(&remove_lock); + + otx2_mbox_lock(&vf->mbox); + del_req = otx2_mbox_alloc_msg_npc_delete_flow(&vf->mbox); + free_req = otx2_mbox_alloc_msg_npc_mcam_free_entry(&vf->mbox); + if (!del_req || !free_req) { + dev_err(vf->dev, "Could not allocate msg for freeing entry\n"); + } else { + del_req->entry = drop_entry; + free_req->entry = drop_entry; + WARN_ON(otx2_sync_mbox_msg(&vf->mbox)); + } + otx2_mbox_unlock(&vf->mbox); + + otx2_stop(vf->netdev); + drop_entry = 0xFFFF; + + return 0; +} |