603c594e45
Added a separate loop to dequeue the rx pkts and relinquish REO and rx-Refill ring faster. Additionl rx processing is moved to a different per vdev loop. CRs-Fixed: 1098453 Change-Id: I43b1fa302cf7e7c77f6114ea491306c0b724e365
453 lines
12 KiB
C
453 lines
12 KiB
C
/*
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* Copyright (c) 2017 The Linux Foundation. All rights reserved.
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*
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* Permission to use, copy, modify, and/or distribute this software for
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* any purpose with or without fee is hereby granted, provided that the
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* above copyright notice and this permission notice appear in all
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* copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
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* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
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* AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL
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* DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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* PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include "dp_types.h"
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#include "dp_rx.h"
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#include "dp_peer.h"
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#include "hal_rx.h"
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#include "hal_api.h"
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#include "qdf_nbuf.h"
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#include <ieee80211.h>
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#ifdef RXDMA_OPTIMIZATION
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#define RX_BUFFER_ALIGNMENT 128
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#else /* RXDMA_OPTIMIZATION */
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#define RX_BUFFER_ALIGNMENT 4
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#endif /* RXDMA_OPTIMIZATION */
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#define RX_BUFFER_SIZE 2048
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#define RX_BUFFER_RESERVATION 0
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/*
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* dp_rx_buffers_replenish() - replenish rxdma ring with rx nbufs
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* called during dp rx initialization
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* and at the end of dp_rx_process.
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*
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* @soc: core txrx main context
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* @mac_id: mac_id which is one of 3 mac_ids
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* @desc_list: list of descs if called from dp_rx_process
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* or NULL during dp rx initialization or out of buffer
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* interrupt.
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* @owner: who owns the nbuf (host, NSS etc...)
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* Return: return success or failure
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*/
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QDF_STATUS dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id,
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uint32_t num_req_buffers,
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union dp_rx_desc_list_elem_t **desc_list,
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union dp_rx_desc_list_elem_t **tail,
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uint8_t owner)
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{
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uint32_t num_alloc_desc;
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uint16_t num_desc_to_free = 0;
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struct dp_pdev *dp_pdev = dp_soc->pdev_list[mac_id];
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uint32_t num_entries_avail;
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uint32_t count;
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int sync_hw_ptr = 1;
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qdf_dma_addr_t paddr;
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qdf_nbuf_t rx_netbuf;
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void *rxdma_ring_entry;
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union dp_rx_desc_list_elem_t *next;
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struct dp_srng *dp_rxdma_srng = &dp_pdev->rx_refill_buf_ring;
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void *rxdma_srng = dp_rxdma_srng->hal_srng;
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if (!rxdma_srng) {
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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"rxdma srng not initialized");
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return QDF_STATUS_E_FAILURE;
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}
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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"requested %d buffers for replenish", num_req_buffers);
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/*
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* if desc_list is NULL, allocate the descs from freelist
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*/
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if (!(*desc_list)) {
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num_alloc_desc = dp_rx_get_free_desc_list(dp_soc, mac_id,
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num_req_buffers,
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desc_list,
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tail);
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if (!num_alloc_desc) {
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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"no free rx_descs in freelist");
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return QDF_STATUS_E_NOMEM;
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}
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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"%d rx desc allocated", num_alloc_desc);
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num_req_buffers = num_alloc_desc;
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}
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hal_srng_access_start(dp_soc->hal_soc, rxdma_srng);
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num_entries_avail = hal_srng_src_num_avail(dp_soc->hal_soc,
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rxdma_srng,
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sync_hw_ptr);
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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"no of availble entries in rxdma ring: %d",
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num_entries_avail);
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if (num_entries_avail < num_req_buffers) {
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num_desc_to_free = num_req_buffers - num_entries_avail;
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num_req_buffers = num_entries_avail;
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}
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for (count = 0; count < num_req_buffers; count++) {
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rxdma_ring_entry = hal_srng_src_get_next(dp_soc->hal_soc,
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rxdma_srng);
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rx_netbuf = qdf_nbuf_alloc(dp_pdev->osif_pdev,
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RX_BUFFER_SIZE,
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RX_BUFFER_RESERVATION,
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RX_BUFFER_ALIGNMENT,
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FALSE);
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qdf_nbuf_map_single(dp_soc->osdev, rx_netbuf,
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QDF_DMA_BIDIRECTIONAL);
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paddr = qdf_nbuf_get_frag_paddr(rx_netbuf, 0);
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next = (*desc_list)->next;
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(*desc_list)->rx_desc.nbuf = rx_netbuf;
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hal_rxdma_buff_addr_info_set(rxdma_ring_entry, paddr,
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(*desc_list)->rx_desc.cookie,
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owner);
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*desc_list = next;
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}
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hal_srng_access_end(dp_soc->hal_soc, rxdma_srng);
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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"successfully replenished %d buffers", num_req_buffers);
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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"%d rx desc added back to free list", num_desc_to_free);
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/*
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* add any available free desc back to the free list
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*/
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if (*desc_list)
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dp_rx_add_desc_list_to_free_list(dp_soc, desc_list,
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tail, mac_id);
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return QDF_STATUS_SUCCESS;
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}
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/**
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* dp_rx_intrabss_fwd() - Implements the Intra-BSS forwarding logic
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*
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* @soc: core txrx main context
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* @sa_peer : source peer entry
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* @rx_tlv_hdr : start address of rx tlvs
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* @nbuf : nbuf that has to be intrabss forwarded
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*
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* Return: bool: true if it is forwarded else false
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*/
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static bool
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dp_rx_intrabss_fwd(struct dp_soc *soc,
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struct dp_peer *sa_peer,
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uint8_t *rx_tlv_hdr,
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qdf_nbuf_t nbuf)
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{
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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FL("Intra-BSS forwarding not implemented"));
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return false;
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}
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/**
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* dp_rx_process() - Brain of the Rx processing functionality
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* Called from the bottom half (tasklet/NET_RX_SOFTIRQ)
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* @soc: core txrx main context
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* @hal_ring: opaque pointer to the HAL Rx Ring, which will be serviced
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* @quota: No. of units (packets) that can be serviced in one shot.
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*
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* This function implements the core of Rx functionality. This is
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* expected to handle only non-error frames.
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*
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* Return: uint32_t: No. of elements processed
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*/
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uint32_t
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dp_rx_process(struct dp_soc *soc, void *hal_ring, uint32_t quota)
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{
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void *hal_soc;
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void *ring_desc;
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struct dp_rx_desc *rx_desc;
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qdf_nbuf_t nbuf;
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qdf_nbuf_t deliver_list_head = NULL;
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qdf_nbuf_t deliver_list_tail = NULL;
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union dp_rx_desc_list_elem_t *head = NULL;
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union dp_rx_desc_list_elem_t *tail = NULL;
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uint32_t rx_bufs_used = 0, rx_buf_cookie, l2_hdr_offset;
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uint16_t msdu_len;
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uint16_t peer_id;
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struct dp_peer *peer = NULL;
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struct dp_vdev *vdev = NULL;
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struct hal_rx_mpdu_desc_info mpdu_desc_info;
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enum hal_reo_error_status error;
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uint32_t pkt_len;
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uint32_t peer_mdata;
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uint8_t *rx_tlv_hdr;
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uint32_t rx_bufs_reaped = 0;
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struct dp_pdev *pdev;
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/* Debug -- Remove later */
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qdf_assert(soc && hal_ring);
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hal_soc = soc->hal_soc;
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/* Debug -- Remove later */
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qdf_assert(hal_soc);
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if (qdf_unlikely(hal_srng_access_start(hal_soc, hal_ring))) {
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/*
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* Need API to convert from hal_ring pointer to
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* Ring Type / Ring Id combo
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*/
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QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR,
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FL("HAL RING Access Failed -- %p"), hal_ring);
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hal_srng_access_end(hal_soc, hal_ring);
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goto done;
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}
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/*
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* start reaping the buffers from reo ring and queue
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* them in per vdev queue.
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* Process the received pkts in a different per vdev loop.
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*/
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while (qdf_likely((ring_desc =
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hal_srng_dst_get_next(hal_soc, hal_ring))
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&& quota--)) {
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error = HAL_RX_ERROR_STATUS_GET(ring_desc);
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if (qdf_unlikely(error == HAL_REO_ERROR_DETECTED)) {
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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FL("HAL RING 0x%p:error %d"), hal_ring, error);
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/* Don't know how to deal with this -- assert */
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qdf_assert(0);
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}
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rx_buf_cookie = HAL_RX_REO_BUF_COOKIE_GET(ring_desc);
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rx_desc = dp_rx_cookie_2_va(soc, rx_buf_cookie);
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qdf_assert(rx_desc);
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rx_bufs_reaped++;
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/* TODO */
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/*
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* Need a separate API for unmapping based on
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* phyiscal address
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*/
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qdf_nbuf_unmap_single(soc->osdev, rx_desc->nbuf,
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QDF_DMA_BIDIRECTIONAL);
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/* Get MPDU DESC info */
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hal_rx_mpdu_desc_info_get(ring_desc, &mpdu_desc_info);
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peer_id = DP_PEER_METADATA_PEER_ID_GET(
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mpdu_desc_info.peer_meta_data);
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peer = dp_peer_find_by_id(soc, peer_id);
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if (!peer) {
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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FL("peer look-up failed peer id %d"), peer_id);
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/* Drop & free packet */
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qdf_nbuf_free(rx_desc->nbuf);
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goto fail;
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}
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vdev = peer->vdev;
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if (!vdev) {
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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FL("vdev is NULL"));
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qdf_nbuf_free(rx_desc->nbuf);
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goto fail;
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}
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qdf_nbuf_queue_add(&vdev->rxq, rx_desc->nbuf);
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fail:
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dp_rx_add_to_free_desc_list(&head, &tail, rx_desc);
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}
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done:
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hal_srng_access_end(hal_soc, hal_ring);
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if (!rx_bufs_reaped)
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return 0;
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else
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/* Replenish buffers */
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/* Assume MAC id = 0, owner = 0 */
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dp_rx_buffers_replenish(soc, 0, rx_bufs_reaped, &head, &tail,
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HAL_RX_BUF_RBM_SW3_BM);
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pdev = soc->pdev_list[0];
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if (qdf_unlikely(!pdev)) {
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QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR,
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FL("pdev is NULL"));
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goto fail1;
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}
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TAILQ_FOREACH(vdev, &pdev->vdev_list, vdev_list_elem) {
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while ((nbuf = qdf_nbuf_queue_remove(&vdev->rxq))) {
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rx_tlv_hdr = qdf_nbuf_data(nbuf);
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/*
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* Check if DMA completed -- msdu_done is the last bit
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* to be written
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*/
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if (!hal_rx_attn_msdu_done_get(rx_tlv_hdr)) {
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QDF_TRACE(QDF_MODULE_ID_DP,
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QDF_TRACE_LEVEL_ERROR,
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FL("HAL RING 0x%p"), hal_ring);
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print_hex_dump(KERN_ERR,
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"\t Pkt Desc:", DUMP_PREFIX_NONE, 32, 4,
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rx_tlv_hdr, 128, false);
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qdf_assert(0);
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}
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peer_mdata = hal_rx_mpdu_peer_meta_data_get(rx_tlv_hdr);
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peer_id = DP_PEER_METADATA_PEER_ID_GET(peer_mdata);
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peer = dp_peer_find_by_id(soc, peer_id);
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/* TODO */
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/*
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* In case of roaming peer object may not be
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* immediately available -- need to handle this
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* Cannot drop these packets right away.
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*/
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/* Peer lookup failed */
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if (!peer) {
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/* Drop & free packet */
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qdf_nbuf_free(nbuf);
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/* Statistics */
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continue;
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}
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/*
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* HW structures call this L3 header padding --
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* even though this is actually the offset from
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* the buffer beginning where the L2 header
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* begins.
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*/
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l2_hdr_offset =
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hal_rx_msdu_end_l3_hdr_padding_get(rx_tlv_hdr);
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msdu_len = hal_rx_msdu_start_msdu_len_get(rx_tlv_hdr);
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pkt_len = msdu_len + l2_hdr_offset + RX_PKT_TLVS_LEN;
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/* Set length in nbuf */
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qdf_nbuf_set_pktlen(nbuf, pkt_len);
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/*
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* Advance the packet start pointer by total size of
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* pre-header TLV's
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*/
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qdf_nbuf_pull_head(nbuf,
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RX_PKT_TLVS_LEN + l2_hdr_offset);
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/* TODO */
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/* WDS Source Port Learning */
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/* Intrabss-fwd */
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if (dp_rx_intrabss_fwd(soc, peer, rx_tlv_hdr, nbuf))
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continue; /* Get next descriptor */
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rx_bufs_used++;
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DP_RX_LIST_APPEND(deliver_list_head,
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deliver_list_tail,
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nbuf);
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}
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if (qdf_likely(vdev->osif_rx) && deliver_list_head)
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vdev->osif_rx(vdev->osif_vdev, deliver_list_head);
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}
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return rx_bufs_used; /* Assume no scale factor for now */
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fail1:
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qdf_assert(0);
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return 0;
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}
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/**
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* dp_rx_detach() - detach dp rx
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* @soc: core txrx main context
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*
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* This function will detach DP RX into main device context
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* will free DP Rx resources.
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*
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* Return: void
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*/
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void
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dp_rx_pdev_detach(struct dp_pdev *pdev)
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{
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uint8_t pdev_id = pdev->pdev_id;
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struct dp_soc *soc = pdev->soc;
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dp_rx_desc_pool_free(soc, pdev_id);
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qdf_spinlock_destroy(&soc->rx_desc_mutex[pdev_id]);
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return;
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}
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/**
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* dp_rx_attach() - attach DP RX
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* @soc: core txrx main context
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*
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* This function will attach a DP RX instance into the main
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* device (SOC) context. Will allocate dp rx resource and
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* initialize resources.
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*
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* Return: QDF_STATUS_SUCCESS: success
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* QDF_STATUS_E_RESOURCES: Error return
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*/
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QDF_STATUS
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dp_rx_pdev_attach(struct dp_pdev *pdev)
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{
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uint8_t pdev_id = pdev->pdev_id;
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struct dp_soc *soc = pdev->soc;
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struct dp_srng rxdma_srng;
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uint32_t rxdma_entries;
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union dp_rx_desc_list_elem_t *desc_list = NULL;
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union dp_rx_desc_list_elem_t *tail = NULL;
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qdf_spinlock_create(&soc->rx_desc_mutex[pdev_id]);
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pdev = soc->pdev_list[pdev_id];
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rxdma_srng = pdev->rx_refill_buf_ring;
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rxdma_entries = rxdma_srng.alloc_size/hal_srng_get_entrysize(
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soc->hal_soc, RXDMA_BUF);
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dp_rx_desc_pool_alloc(soc, pdev_id);
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/* For Rx buffers, WBM release ring is SW RING 3,for all pdev's */
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dp_rx_buffers_replenish(soc, pdev_id, rxdma_entries,
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&desc_list, &tail, HAL_RX_BUF_RBM_SW3_BM);
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return QDF_STATUS_SUCCESS;
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}
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