4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * CDDL HEADER START
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * The contents of this file are subject to the terms of the
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * Common Development and Distribution License (the "License").
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * You may not use this file except in compliance with the License.
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * or http://www.opensolaris.org/os/licensing.
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * See the License for the specific language governing permissions
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * and limitations under the License.
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * When distributing Covered Code, include this CDDL HEADER in each
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * If applicable, add the following below this CDDL HEADER, with the
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * fields enclosed by brackets "[]" replaced with your own identifying
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * information: Portions Copyright [yyyy] [name of copyright owner]
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * CDDL HEADER END
3abb112f8485b33b6b9b52b340bede0a333c10bfGarrett D'Amore/* Copyright © 2003-2011 Emulex. All rights reserved. */
0dc2366f7b9f9f36e10909b1e95edbf2a261c2acVenugopal Iyer * Source file containing the Receive Path handling
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic void oce_rqb_dtor(oce_rq_bdesc_t *rqbd);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic int oce_rqb_ctor(oce_rq_bdesc_t *rqbd, struct oce_rq *rq,
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathanstatic inline mblk_t *oce_rx(struct oce_dev *dev, struct oce_rq *rq,
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanstatic inline mblk_t *oce_rx_bcopy(struct oce_dev *dev,
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan struct oce_rq *rq, struct oce_nic_rx_cqe *cqe);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic int oce_rq_charge(struct oce_rq *rq, uint32_t nbufs, boolean_t repost);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanstatic void oce_rx_insert_tag(mblk_t *mp, uint16_t vtag);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanstatic void oce_set_rx_oflags(mblk_t *mp, struct oce_nic_rx_cqe *cqe);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanstatic inline void oce_rx_drop_pkt(struct oce_rq *rq,
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic oce_rq_bdesc_t *oce_rqb_alloc(struct oce_rq *rq);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic void oce_rqb_free(struct oce_rq *rq, oce_rq_bdesc_t *rqbd);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic void oce_rq_post_buffer(struct oce_rq *rq, int nbufs);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic ddi_dma_attr_t oce_rx_buf_attr = {
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan 0x0000000000000000ull, /* low address */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan 0xFFFFFFFFFFFFFFFFull, /* high address */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan 0x00000000FFFFFFFFull, /* dma counter max */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan 0x00000000FFFFFFFFull, /* maximum transfer size */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan 0xFFFFFFFFFFFFFFFFull, /* maximum segment size */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan DDI_DMA_FLAGERR|DDI_DMA_RELAXED_ORDERING /* DMA flags */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to create a DMA buffer pool for RQ
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * dev - software handle to the device
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * num_items - number of buffers in the pool
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * item_size - size of each buffer
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * return DDI_SUCCESS => success, DDI_FAILURE otherwise
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathanoce_rqb_cache_create(struct oce_rq *rq, size_t buf_size)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan size = rq->cfg.frag_size + OCE_RQE_BUF_HEADROOM;
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan for (cnt = 0; cnt < rq->cfg.nbufs; cnt++, rqbd++) {
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan size, (DDI_DMA_RDWR|DDI_DMA_STREAMING));
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_rqb_cache_create */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to Destroy RQ DMA buffer cache
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to rq structure
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan for (cnt = 0; cnt < rq->cfg.nbufs; cnt++, rqbd++) {
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_rqb_cache_destroy */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * RQ buffer destructor function
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rqbd - pointer to rq buffer descriptor
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan if ((rqbd == NULL) || (rqbd->rq == NULL)) {
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan oce_free_dma_buffer(rqbd->rq->parent, rqbd->rqb);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_rqb_dtor */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * RQ buffer constructor function
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rqbd - pointer to rq buffer descriptor
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to RQ structure
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * size - size of the buffer
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * flags - KM_SLEEP OR KM_NOSLEEP
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * return DDI_SUCCESS => success, DDI_FAILURE otherwise
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathanoce_rqb_ctor(oce_rq_bdesc_t *rqbd, struct oce_rq *rq, size_t size, int flags)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan dbuf = oce_alloc_dma_buffer(dev, size, &oce_rx_buf_attr, flags);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan /* Set the call back function parameters */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rqbd->fr_rtn.free_func = (void (*)())oce_rx_pool_free;
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rqbd->fr_rtn.free_arg = (caddr_t)(void *)rqbd;
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rqbd->mp = desballoc((uchar_t *)(dbuf->base),
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan rqbd->frag_addr.dw.addr_lo = ADDR_LO(dbuf->addr + OCE_RQE_BUF_HEADROOM);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan rqbd->frag_addr.dw.addr_hi = ADDR_HI(dbuf->addr + OCE_RQE_BUF_HEADROOM);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan rqbd->mp->b_rptr = (uchar_t *)rqbd->rqb->base + OCE_RQE_BUF_HEADROOM;
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_rqb_ctor */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * RQ buffer allocator function
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to RQ structure
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * return pointer to RQ buffer descriptor
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rq->rqb_next_free = GET_Q_NEXT(free_index, 1, rq->cfg.nbufs);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_rqb_alloc */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to free the RQ buffer
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to RQ structure
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rqbd - pointer to recieve buffer descriptor
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathanstatic inline void
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathanoce_rqb_free(struct oce_rq *rq, oce_rq_bdesc_t *rqbd)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rq->rqb_rc_head = GET_Q_NEXT(free_index, 1, rq->cfg.nbufs);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_rqb_free */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic void oce_rq_post_buffer(struct oce_rq *rq, int nbufs)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rxdb_reg.bits.qid = rq->rq_id & DB_RQ_ID_MASK;
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan for (count = nbufs/OCE_MAX_RQ_POSTS; count > 0; count--) {
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rxdb_reg.bits.num_posted = OCE_MAX_RQ_POSTS;
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan OCE_DB_WRITE32(dev, PD_RXULP_DB, rxdb_reg.dw0);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan OCE_DB_WRITE32(dev, PD_RXULP_DB, rxdb_reg.dw0);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to charge a given rq with buffers from a pool's free list
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * dev - software handle to the device
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to the RQ to charge
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * nbufs - numbers of buffers to be charged
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * return number of rqe's charges.
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathanstatic inline int
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanoce_rq_charge(struct oce_rq *rq, uint32_t nbufs, boolean_t repost)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan /* just repost the buffers from shadow ring */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan cur_index = GET_Q_NEXT(cur_index, 1, ring->num_items);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* fill the rqes */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan rqe = RING_GET_PRODUCER_ITEM_VA(rq->ring,
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan rqe->u0.s.frag_pa_lo = rqbd->frag_addr.dw.addr_lo;
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan rqe->u0.s.frag_pa_hi = rqbd->frag_addr.dw.addr_hi;
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan DW_SWAP(u32ptr(rqe), sizeof (struct oce_nic_rqe));
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_rq_charge */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to release the posted buffers
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to the RQ to charge
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* Free the posted buffer since RQ is destroyed already */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to process a single packet
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * dev - software handle to the device
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to the RQ to charge
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * cqe - Pointer to Completion Q entry
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * return mblk pointer => success, NULL => error
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathanoce_rx(struct oce_dev *dev, struct oce_rq *rq, struct oce_nic_rx_cqe *cqe)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan frag_cnt = cqe->u0.s.num_fragments & 0x7;
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* Get the relevant Queue pointers */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan for (i = 0; i < frag_cnt; i++) {
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rqbd->mp = desballoc((uchar_t *)rqbd->rqb->base,
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (uchar_t *)rqbd->rqb->base + OCE_RQE_BUF_HEADROOM;
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan frag_size = (pkt_len > rq->cfg.frag_size) ?
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* Chain the message mblks */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (void) DBUF_SYNC(rqbd->rqb, DDI_DMA_SYNC_FORCPU);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan cur_index = GET_Q_NEXT(cur_index, 1, ring->num_items);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan oce_log(dev, CE_WARN, MOD_RX, "%s", "oce_rx:no frags?");
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan /* replace the buffer with new ones */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (void) oce_rq_charge(rq, frag_cnt, B_FALSE);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanoce_rx_bcopy(struct oce_dev *dev, struct oce_rq *rq, struct oce_nic_rx_cqe *cqe)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan alloc_len = pkt_len + OCE_RQE_BUF_HEADROOM;
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan frag_cnt = cqe->u0.s.num_fragments & 0x7;
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan frag_size = (pkt_len > rq->cfg.frag_size) ?
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (void) DBUF_SYNC(rqbd->rqb, DDI_DMA_SYNC_FORCPU);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan bcopy(rqbd->rqb->base + OCE_RQE_BUF_HEADROOM, rptr, frag_size);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan cur_index = GET_Q_NEXT(cur_index, 1, ring->num_items);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (void) oce_rq_charge(rq, frag_cnt, B_TRUE);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanstatic inline void
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanoce_set_rx_oflags(mblk_t *mp, struct oce_nic_rx_cqe *cqe)
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* set flags */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan csum_flags |= (HCK_FULLCKSUM | HCK_FULLCKSUM_OK);
0dc2366f7b9f9f36e10909b1e95edbf2a261c2acVenugopal Iyer (void) mac_hcksum_set(mp, 0, 0, 0, 0, csum_flags);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanstatic inline void
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathanoce_rx_insert_tag(mblk_t *mp, uint16_t vtag)
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan ehp = (struct ether_vlan_header *)voidptr(mp->b_rptr);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan ehp->ether_tpid = htons(ETHERTYPE_VLAN);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanstatic inline void
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathanoce_rx_drop_pkt(struct oce_rq *rq, struct oce_nic_rx_cqe *cqe)
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan for (frag_cnt = 0; frag_cnt < cqe->u0.s.num_fragments; frag_cnt++) {
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to process a Recieve queue
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * arg - pointer to the RQ to charge
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * return number of cqes processed
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan cqe = RING_GET_CONSUMER_ITEM_VA(cq->ring, struct oce_nic_rx_cqe);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (void) DBUF_SYNC(cq->ring->dbuf, DDI_DMA_SYNC_FORKERNEL);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* dequeue till you reach an invalid cqe */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan DW_SWAP(u32ptr(cqe), sizeof (struct oce_nic_rx_cqe));
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan frag_cnt = cqe->u0.s.num_fragments & 0x7;
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan /* if insufficient buffers to charge then do copy */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan if ((cqe->u0.s.pkt_size < dev->rx_bcopy_limit) ||
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (oce_atomic_reserve(&rq->rqb_free, frag_cnt) < 0)) {
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan oce_rx_insert_tag(mp, cqe->u0.s.vlan_tag);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (void) oce_rq_charge(rq, frag_cnt, B_TRUE);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan cqe = RING_GET_CONSUMER_ITEM_VA(cq->ring,
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan /* process max ring size */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan } /* for all valid CQEs */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan mac_rx(dev->mac_handle, NULL, mblk_head);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan oce_arm_cq(dev, cq->cq_id, num_cqe, B_TRUE);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_drain_rq_cq */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to free mblk databuffer to the RQ pool
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * arg - pointer to the receive buffer descriptor
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* During destroy, arg will be NULL */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan /* retrieve the pointers from arg */
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan rqbd->mp = desballoc((uchar_t *)rqbd->rqb->base,
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (uchar_t *)rqbd->rqb->base + OCE_RQE_BUF_HEADROOM;
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* rx_pool_free */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to stop the RX
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to RQ structure
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan cqe = RING_GET_CONSUMER_ITEM_VA(cq->ring, struct oce_nic_rx_cqe);
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan /* dequeue till you reach an invalid cqe */
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan for (ti = 0; ti < DEFAULT_DRAIN_TIME; ti++) {
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan DW_SWAP(u32ptr(cqe), sizeof (struct oce_nic_rx_cqe));
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan cqe = RING_GET_CONSUMER_ITEM_VA(cq->ring,
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan} /* oce_clean_rq */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * function to start the RX
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * rq - pointer to RQ structure
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan * return number of rqe's charges.
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan to_charge = rq->cfg.q_len - rq->buf_avail;
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan to_charge = min(to_charge, rq->rqb_free);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan atomic_add_32(&rq->rqb_free, -to_charge);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan (void) oce_rq_charge(rq, to_charge, B_FALSE);
5b9d3151a4426af9ad6ef2c2a178f13476b884b3Sukumar Swaminathan /* ok to do it here since Rx has not even started */
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan oce_arm_cq(dev, rq->cq->cq_id, 0, B_TRUE);
4d0e50075058332ce0cd62bc2669a8a4dea45da0Sukumar Swaminathan} /* oce_start_rq */
8d738d7d1f42180d941afa8b9a7310a2a437d17cSukumar Swaminathan/* Checks for pending rx buffers with Stack */