diff --git a/dp/wifi3.0/dp_peer.h b/dp/wifi3.0/dp_peer.h new file mode 100644 index 0000000000..194d89c1ae --- /dev/null +++ b/dp/wifi3.0/dp_peer.h @@ -0,0 +1,44 @@ +/* + * Copyright (c) 2016 The Linux Foundation. All rights reserved. + * + * Permission to use, copy, modify, and/or distribute this software for + * any purpose with or without fee is hereby granted, provided that the + * above copyright notice and this permission notice appear in all + * copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE + * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#include +#include +#include "dp_types.h" + +#define DP_INVALID_PEER_ID 0xffff + +/** + * dp_peer_find_by_id() - Returns peer object given the peer id + * + * @soc : core DP soc context + * @peer_id : peer id from peer object can be retrieved + * + * Return: struct dp_peer*: Pointer to DP peer object + */ +static inline struct dp_peer * +dp_peer_find_by_id(struct dp_soc *soc, + uint16_t peer_id) +{ + struct dp_peer *peer; + + /* TODO: Hold lock */ + peer = (peer_id >= soc->max_peers) ? NULL : + soc->peer_id_to_obj_map[peer_id]; + + return peer; +} diff --git a/dp/wifi3.0/dp_rx.c b/dp/wifi3.0/dp_rx.c new file mode 100644 index 0000000000..608853b9d4 --- /dev/null +++ b/dp/wifi3.0/dp_rx.c @@ -0,0 +1,439 @@ +/* + * Copyright (c) 2016 The Linux Foundation. All rights reserved. + * + * Permission to use, copy, modify, and/or distribute this software for + * any purpose with or without fee is hereby granted, provided that the + * above copyright notice and this permission notice appear in all + * copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE + * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#include "dp_types.h" +#include "dp_rx.h" +#include "dp_peer.h" +#include "hal_rx.h" +#include "hal_api.h" +#include "qdf_nbuf.h" +#include + +#ifdef RXDMA_OPTIMIZATION +#define RX_BUFFER_ALIGNMENT 128 +#else /* RXDMA_OPTIMIZATION */ +#define RX_BUFFER_ALIGNMENT 4 +#endif /* RXDMA_OPTIMIZATION */ + +#define RX_BUFFER_SIZE 2048 +#define RX_BUFFER_RESERVATION 0 + +/* + * dp_rx_buffers_replenish() - replenish rxdma ring with rx nbufs + * called during dp rx initialization + * and at the end of dp_rx_process. + * + * @soc: core txrx main context + * @mac_id: mac_id which is one of 3 mac_ids + * @desc_list: list of descs if called from dp_rx_process + * or NULL during dp rx initialization or out of buffer + * interrupt. + * @owner: who owns the nbuf (host, NSS etc...) + * Return: return success or failure + */ +QDF_STATUS dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id, + uint32_t num_req_buffers, + union dp_rx_desc_list_elem_t **desc_list, + union dp_rx_desc_list_elem_t **tail, + uint8_t owner) +{ + uint32_t num_alloc_desc; + uint16_t num_desc_to_free = 0; + struct dp_pdev *dp_pdev = dp_soc->pdev_list[mac_id]; + uint32_t num_entries_avail; + uint32_t count; + int sync_hw_ptr = 1; + qdf_dma_addr_t paddr; + qdf_nbuf_t rx_netbuf; + void *rxdma_ring_entry; + union dp_rx_desc_list_elem_t *next; + struct dp_srng *dp_rxdma_srng = &dp_pdev->rxdma_buf_ring; + void *rxdma_srng = dp_rxdma_srng->hal_srng; + + if (!rxdma_srng) { + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "rxdma srng not initialized"); + return QDF_STATUS_E_FAILURE; + } + + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "requested %d buffers for replenish", num_req_buffers); + + /* + * if desc_list is NULL, allocate the descs from freelist + */ + if (!(*desc_list)) { + num_alloc_desc = dp_rx_get_free_desc_list(dp_soc, mac_id, + num_req_buffers, + desc_list, + tail); + + if (!num_alloc_desc) { + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "no free rx_descs in freelist"); + return QDF_STATUS_E_NOMEM; + } + + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "%d rx desc allocated", num_alloc_desc); + num_req_buffers = num_alloc_desc; + } + + hal_srng_access_start(dp_soc->hal_soc, rxdma_srng); + num_entries_avail = hal_srng_src_num_avail(dp_soc->hal_soc, + rxdma_srng, + sync_hw_ptr); + + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "no of availble entries in rxdma ring: %d", + num_entries_avail); + + if (num_entries_avail < num_req_buffers) { + num_desc_to_free = num_req_buffers - num_entries_avail; + num_req_buffers = num_entries_avail; + } + + for (count = 0; count < num_req_buffers; count++) { + rxdma_ring_entry = hal_srng_src_get_next(dp_soc->hal_soc, + rxdma_srng); + + rx_netbuf = qdf_nbuf_alloc(dp_pdev->osif_pdev, + RX_BUFFER_SIZE, + RX_BUFFER_RESERVATION, + RX_BUFFER_ALIGNMENT, + FALSE); + + qdf_nbuf_map_single(dp_soc->osdev, rx_netbuf, + QDF_DMA_BIDIRECTIONAL); + + paddr = qdf_nbuf_get_frag_paddr(rx_netbuf, 0); + + next = (*desc_list)->next; + + (*desc_list)->rx_desc.nbuf = rx_netbuf; + hal_rxdma_buff_addr_info_set(rxdma_ring_entry, paddr, + (*desc_list)->rx_desc.cookie, + owner); + + *desc_list = next; + } + + hal_srng_access_end(dp_soc->hal_soc, rxdma_srng); + + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "successfully replenished %d buffers", num_req_buffers); + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "%d rx desc added back to free list", num_desc_to_free); + + /* + * add any available free desc back to the free list + */ + if (*desc_list) + dp_rx_add_desc_list_to_free_list(dp_soc, desc_list, + tail, mac_id); + + return QDF_STATUS_SUCCESS; +} + +/** + * dp_rx_intrabss_fwd() - Implements the Intra-BSS forwarding logic + * + * @soc: core txrx main context + * @rx_desc : Rx descriptor + * @msdu_ifno : place holder to store Rx MSDU Details from Rx desc + * @osdu_ifno : place holder to store Rx MPDU Details from Rx desc + * @is_term: Value filled in by this function, if logic determines this + * to be a terminating packet + * + * Return: bool: true if it is forwarded else false + */ +static bool +dp_rx_intrabss_fwd(struct dp_soc *soc, + struct dp_rx_desc *rx_desc, + struct hal_rx_msdu_desc_info *msdu_info, + struct hal_rx_mpdu_desc_info *mpdu_info, + bool *is_term) +{ + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "%s %d : Intra-BSS forwarding not implemented", + __func__, __LINE__); + return false; +} + + +/** + * dp_rx_process() - Brain of the Rx processing functionality + * Called from the bottom half (tasklet/NET_RX_SOFTIRQ) + * @soc: core txrx main context + * @hal_ring: opaque pointer to the HAL Rx Ring, which will be serviced + * @quota: No. of units (packets) that can be serviced in one shot. + * + * This function implements the core of Rx functionality. This is + * expected to handle only non-error frames. + * + * Return: uint32_t: No. of elements processed + */ +uint32_t +dp_rx_process(struct dp_soc *soc, void *hal_ring, uint32_t quota) +{ + void *hal_soc; + void *ring_desc; + struct dp_rx_desc *rx_desc; + qdf_nbuf_t nbuf; + union dp_rx_desc_list_elem_t *head = NULL; + union dp_rx_desc_list_elem_t *tail = NULL; + bool is_term; + uint32_t rx_bufs_used = 0, rx_buf_cookie, l2_hdr_offset; + uint16_t peer_id; + struct dp_peer *peer = NULL; + struct hal_rx_msdu_desc_info msdu_desc_info; + struct hal_rx_mpdu_desc_info mpdu_desc_info; + qdf_nbuf_t head_msdu, tail_msdu; + enum hal_reo_error_status error; + uint32_t pkt_len; + + /* Debug -- Remove later */ + qdf_assert(soc && hal_ring); + + hal_soc = soc->hal_soc; + + /* Debug -- Remove later */ + qdf_assert(hal_soc); + + if (qdf_unlikely(hal_srng_access_start(hal_soc, hal_ring))) { + + /* + * Need API to convert from hal_ring pointer to + * Ring Type / Ring Id combo + */ + QDF_TRACE(QDF_MODULE_ID_TXRX, QDF_TRACE_LEVEL_ERROR, + "%s %d : HAL RING Access Failed -- %p\n", + __func__, __LINE__, hal_ring); + hal_srng_access_end(hal_soc, hal_ring); + goto done; + } + + head_msdu = tail_msdu = NULL; + + while (qdf_likely((ring_desc = + hal_srng_dst_get_next(hal_soc, hal_ring)) + && quota--)) { + + error = HAL_RX_ERROR_STATUS_GET(ring_desc); + + if (qdf_unlikely(error == HAL_REO_ERROR_DETECTED)) { + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "%s %d : HAL RING 0x%p:error %d\n", + __func__, __LINE__, hal_ring, error); + /* Don't know how to deal with this -- assert */ + qdf_assert(0); + } + + rx_buf_cookie = HAL_RX_REO_BUF_COOKIE_GET(ring_desc); + + rx_desc = dp_rx_cookie_2_va(soc, rx_buf_cookie); + + qdf_assert(rx_desc); + + rx_bufs_used++; + + /* Get MSDU DESC info */ + hal_rx_msdu_desc_info_get(ring_desc, &msdu_desc_info); + + nbuf = rx_desc->nbuf; + /* TODO */ + /* + * Need a separate API for unmapping based on + * phyiscal address + */ + qdf_nbuf_unmap_single(soc->osdev, nbuf, + QDF_DMA_BIDIRECTIONAL); + + rx_desc->rx_buf_start = qdf_nbuf_data(nbuf); + + /* + * HW structures call this L3 header padding -- even though + * this is actually the offset from the buffer beginning + * where the L2 header begins. + */ + l2_hdr_offset = + hal_rx_msdu_end_l3_hdr_padding_get( + rx_desc->rx_buf_start); + + pkt_len = msdu_desc_info.msdu_len + + l2_hdr_offset + RX_PKT_TLVS_LEN; + + /* Set length in nbuf */ + qdf_nbuf_set_pktlen(nbuf, pkt_len); + + /* + * Check if DMA completed -- msdu_done is the last bit + * to be written + */ + if (!hal_rx_attn_msdu_done_get(rx_desc->rx_buf_start)) { + + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_ERROR, + "%s %d : HAL RING 0x%p\n", + __func__, __LINE__, hal_ring); + + print_hex_dump(KERN_ERR, + "\t Pkt Desc:", DUMP_PREFIX_NONE, 32, 4, + rx_desc->rx_buf_start, 128, false); + + qdf_assert(0); + } + + /* + * Advance the packet start pointer by total size of + * pre-header TLV's + */ + qdf_nbuf_pull_head(nbuf, RX_PKT_TLVS_LEN); + + if (l2_hdr_offset) + qdf_nbuf_pull_head(nbuf, l2_hdr_offset); + + /* TODO -- Remove -- Just for initial debug */ + + print_hex_dump(KERN_ERR, "\t Pkt Buf:", + DUMP_PREFIX_NONE, 32, 4, + qdf_nbuf_data(nbuf), 128, false); + + /* Get the MPDU DESC info */ + hal_rx_mpdu_info_get(ring_desc, &mpdu_desc_info); + + /* TODO */ + /* WDS Source Port Learning */ + + /* Intrabss-fwd */ + if (dp_rx_intrabss_fwd(soc, rx_desc, + &msdu_desc_info, &mpdu_desc_info, &is_term)) + continue; /* Get next descriptor */ + + peer_id = DP_PEER_METADATA_PEER_ID_GET( + mpdu_desc_info.peer_meta_data); + + peer = dp_peer_find_by_id(soc, peer_id); + + /* TODO */ + /* + * In case of roaming peer object may not be + * immediately available -- need to handle this + * Cannot drop these packets right away. + */ + /* Peer lookup failed */ + if (!peer) { + + /* Drop & free packet */ + qdf_nbuf_free(rx_desc->nbuf); + + /* Statistics */ + + /* Add free rx_desc to a free list */ + dp_rx_add_to_free_desc_list(&head, &tail, rx_desc); + + continue; + } + + if (qdf_unlikely(!head_msdu)) + head_msdu = rx_desc->nbuf; + else + qdf_nbuf_set_next(tail_msdu, rx_desc->nbuf); + + tail_msdu = rx_desc->nbuf; + + dp_rx_add_to_free_desc_list(&head, &tail, rx_desc); + } + + hal_srng_access_end(hal_soc, hal_ring); + + if (!head_msdu) + return 0; + + /* Replenish buffers */ + /* Assume MAC id = 0, owner = 0 */ + dp_rx_buffers_replenish(soc, 0, rx_bufs_used, &head, &tail, + HAL_RX_BUF_RBM_SW3_BM); + + qdf_nbuf_set_next(tail_msdu, NULL); + + + /* + * TODO - this assumes all packets reaped belong to one peer/vdev, which + * may not be true, call this inside while loop for each change in vdev + */ + if (qdf_likely(peer->vdev->osif_rx)) + peer->vdev->osif_rx(peer->vdev->osif_vdev, head_msdu); + +done: + return rx_bufs_used; /* Assume no scale factor for now */ +} + +/** + * dp_rx_detach() - detach dp rx + * @soc: core txrx main context + * + * This function will detach DP RX into main device context + * will free DP Rx resources. + * + * Return: void + */ +void +dp_rx_pdev_detach(struct dp_pdev *pdev) +{ + uint8_t pdev_id = pdev->pdev_id; + struct dp_soc *soc = pdev->soc; + + dp_rx_desc_pool_free(soc, pdev_id); + qdf_spinlock_destroy(&soc->rx_desc_mutex[pdev_id]); +} + +/** + * dp_rx_attach() - attach DP RX + * @soc: core txrx main context + * + * This function will attach a DP RX instance into the main + * device (SOC) context. Will allocate dp rx resource and + * initialize resources. + * + * Return: QDF_STATUS_SUCCESS: success + * QDF_STATUS_E_RESOURCES: Error return + */ +QDF_STATUS +dp_rx_pdev_attach(struct dp_pdev *pdev) +{ + uint8_t pdev_id = pdev->pdev_id; + struct dp_soc *soc = pdev->soc; + struct dp_srng rxdma_srng; + uint32_t rxdma_entries; + union dp_rx_desc_list_elem_t *desc_list = NULL; + union dp_rx_desc_list_elem_t *tail = NULL; + + qdf_spinlock_create(&soc->rx_desc_mutex[pdev_id]); + pdev = soc->pdev_list[pdev_id]; + rxdma_srng = pdev->rxdma_buf_ring; + + rxdma_entries = rxdma_srng.alloc_size/hal_srng_get_entrysize( + soc->hal_soc, RXDMA_BUF); + dp_rx_desc_pool_alloc(soc, pdev_id); + + /* For Rx buffers, WBM release ring is SW RING 3,for all pdev's */ + dp_rx_buffers_replenish(soc, pdev_id, rxdma_entries, + &desc_list, &tail, HAL_RX_BUF_RBM_SW3_BM); + + return QDF_STATUS_SUCCESS; +} diff --git a/dp/wifi3.0/dp_rx.h b/dp/wifi3.0/dp_rx.h new file mode 100644 index 0000000000..df40854395 --- /dev/null +++ b/dp/wifi3.0/dp_rx.h @@ -0,0 +1,149 @@ +/* + * Copyright (c) 2016 The Linux Foundation. All rights reserved. + * + * Permission to use, copy, modify, and/or distribute this software for + * any purpose with or without fee is hereby granted, provided that the + * above copyright notice and this permission notice appear in all + * copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE + * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#ifndef _DP_RX_H +#define _DP_RX_H + +#include "hal_rx.h" + +#define DP_PEER_METADATA_PEER_ID_MASK 0x0000ffff +#define DP_PEER_METADATA_PEER_ID_SHIFT 0 +#define DP_PEER_METADATA_VDEV_ID_MASK 0x00070000 +#define DP_PEER_METADATA_VDEV_ID_SHIFT 16 + +#define DP_PEER_METADATA_PEER_ID_GET(_peer_metadata) \ + (((_peer_metadata) & DP_PEER_METADATA_PEER_ID_MASK) \ + >> DP_PEER_METADATA_PEER_ID_SHIFT) + +#define DP_PEER_METADATA_ID_GET(_peer_metadata) \ + (((_peer_metadata) & DP_PEER_METADATA_VDEV_ID_MASK) \ + >> DP_PEER_METADATA_VDEV_ID_SHIFT) + +/** + * struct dp_rx_desc + * + * @nbuf : VA of the "skb" posted + * @rx_buf_start : VA of the original Rx buffer, before + * movement of any skb->data pointer + * @cookie : index into the sw array which holds + * the sw Rx descriptors + * Cookie space is 21 bits: + * lower 18 bits -- index + * upper 3 bits -- pool_id + * @pool_id : pool Id for which this allocated. + * Can only be used if there is no flow + * steering + */ +struct dp_rx_desc { + qdf_nbuf_t nbuf; + uint8_t *rx_buf_start; + uint16_t cookie; + uint8_t pool_id; +}; + +#define RX_DESC_COOKIE_INDEX_SHIFT 0 +#define RX_DESC_COOKIE_INDEX_MASK 0x3ffff /* 18 bits */ +#define RX_DESC_COOKIE_POOL_ID_SHIFT 18 +#define RX_DESC_COOKIE_POOL_ID_MASK 0x1c0000 + +#define DP_RX_DESC_COOKIE_POOL_ID_GET(_cookie) \ + (((_cookie) & RX_DESC_COOKIE_POOL_ID_MASK) >> \ + RX_DESC_COOKIE_POOL_ID_SHIFT) + +#define DP_RX_DESC_COOKIE_INDEX_GET(_cookie) \ + (((_cookie) & RX_DESC_COOKIE_INDEX_MASK) >> \ + RX_DESC_COOKIE_INDEX_SHIFT) + +/** + * struct dp_rx_desc_list_elem_t + * + * @next : Next pointer to form free list + * @rx_desc : DP Rx descriptor + */ +union dp_rx_desc_list_elem_t { + union dp_rx_desc_list_elem_t *next; + struct dp_rx_desc rx_desc; +}; + +/** + * dp_rx_cookie_2_va() - Converts cookie to a virtual address of + * the Rx descriptor. + * @soc: core txrx main context + * @cookie: cookie used to lookup virtual address + * + * Return: void *: Virtual Address of the Rx descriptor + */ +static inline +void *dp_rx_cookie_2_va(struct dp_soc *soc, uint32_t cookie) +{ + uint8_t pool_id = DP_RX_DESC_COOKIE_POOL_ID_GET(cookie); + uint16_t index = DP_RX_DESC_COOKIE_INDEX_GET(cookie); + /* TODO */ + /* Add sanity for pool_id & index */ + return &(soc->rx_desc[pool_id].array[index].rx_desc); +} + +void dp_rx_add_desc_list_to_free_list(struct dp_soc *soc, + union dp_rx_desc_list_elem_t **local_desc_list, + union dp_rx_desc_list_elem_t **tail, + uint16_t pool_id); + +uint16_t dp_rx_get_free_desc_list(struct dp_soc *soc, uint32_t pool_id, + uint16_t num_descs, + union dp_rx_desc_list_elem_t **desc_list, + union dp_rx_desc_list_elem_t **tail); + +QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id); +void dp_rx_desc_pool_free(struct dp_soc *soc, uint32_t pool_id); + +QDF_STATUS dp_rx_pdev_attach(struct dp_pdev *pdev); +void dp_rx_pdev_detach(struct dp_pdev *pdev); + +QDF_STATUS dp_rx_buffers_replenish(struct dp_soc *dp_soc, uint32_t mac_id, + uint32_t num_req_buffers, + union dp_rx_desc_list_elem_t **desc_list, + union dp_rx_desc_list_elem_t **tail, + uint8_t owner); +uint32_t +dp_rx_process(struct dp_soc *soc, void *hal_ring, uint32_t quota); + +/** + * dp_rx_add_to_free_desc_list() - Adds to a local free descriptor list + * + * @head: pointer to the head of local free list + * @tail: pointer to the tail of local free list + * @new: new descriptor that is added to the free list + * + * Return: void: + */ +static inline +void dp_rx_add_to_free_desc_list(union dp_rx_desc_list_elem_t **head, + union dp_rx_desc_list_elem_t **tail, + struct dp_rx_desc *new) +{ + qdf_assert(head && new); + + new->nbuf = NULL; + + ((union dp_rx_desc_list_elem_t *)new)->next = *head; + *head = (union dp_rx_desc_list_elem_t *)new; + if (*tail == NULL) + *tail = *head; + +} +#endif /* _DP_RX_H */ diff --git a/dp/wifi3.0/dp_rx_desc.c b/dp/wifi3.0/dp_rx_desc.c new file mode 100644 index 0000000000..8e7d528c62 --- /dev/null +++ b/dp/wifi3.0/dp_rx_desc.c @@ -0,0 +1,147 @@ +/* + * Copyright (c) 2016 The Linux Foundation. All rights reserved. + * + * Permission to use, copy, modify, and/or distribute this software for + * any purpose with or without fee is hereby granted, provided that the + * above copyright notice and this permission notice appear in all + * copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL + * WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED + * WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE + * AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL + * DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR + * PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER + * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR + * PERFORMANCE OF THIS SOFTWARE. + */ + +#include "dp_types.h" +#include "dp_rx.h" + +/* + * dp_rx_desc_pool_alloc() - create a pool of software rx_descs + * at the time of dp rx initialization + * + * @soc: core txrx main context + * @pool_id: pool_id which is one of 3 mac_ids + * + * return success or failure + */ +QDF_STATUS dp_rx_desc_pool_alloc(struct dp_soc *soc, uint32_t pool_id) +{ + uint32_t i; + struct dp_pdev *dp_pdev = soc->pdev_list[pool_id]; + struct dp_srng *rxdma_srng = &dp_pdev->rxdma_buf_ring; + + soc->rx_desc[pool_id].array = qdf_mem_malloc( + ((rxdma_srng->alloc_size/hal_srng_get_entrysize(soc->hal_soc, + RXDMA_BUF)) * 3) * sizeof(union dp_rx_desc_list_elem_t)); + + if (!(soc->rx_desc[pool_id].array)) { + QDF_TRACE(QDF_MODULE_ID_DP, QDF_TRACE_LEVEL_FATAL, + "%s: RX Desc Pool[%d] allocation failed\n", + __func__, pool_id); + return QDF_STATUS_E_NOMEM; + } + + qdf_spin_lock_bh(&soc->rx_desc_mutex[pool_id]); + soc->rx_desc[pool_id].pool_size = (rxdma_srng->alloc_size/ + hal_srng_get_entrysize(soc->hal_soc, RXDMA_BUF)) * 3; + + /* link SW rx descs into a freelist */ + soc->rx_desc[pool_id].freelist = &soc->rx_desc[pool_id].array[0]; + for (i = 0; i < soc->rx_desc[pool_id].pool_size-1; i++) { + soc->rx_desc[pool_id].array[i].next = + &soc->rx_desc[pool_id].array[i+1]; + soc->rx_desc[pool_id].array[i].rx_desc.cookie = + i | (pool_id << 18); + } + + soc->rx_desc[pool_id].array[i].next = NULL; + soc->rx_desc[pool_id].array[i].rx_desc.cookie = i | (pool_id << 18); + qdf_spin_unlock_bh(&soc->rx_desc_mutex[pool_id]); + return QDF_STATUS_SUCCESS; +} + +/* + * dp_rx_desc_pool_free() - free the sw rx desc pool called during + * de-initialization of wifi module. + * + * @soc: core txrx main context + * @pool_id: pool_id which is one of 3 mac_ids + */ +void dp_rx_desc_pool_free(struct dp_soc *soc, uint32_t pool_id) +{ + qdf_spin_lock_bh(&soc->rx_desc_mutex[pool_id]); + qdf_mem_free(soc->rx_desc[pool_id].array); + qdf_spin_unlock_bh(&soc->rx_desc_mutex[pool_id]); +} + +/* + * dp_rx_get_free_desc_list() - provide a list of descriptors from + * the free rx desc pool. + * + * @soc: core txrx main context + * @pool_id: pool_id which is one of 3 mac_ids + * @num_descs: number of descs requested from freelist + * @desc_list: attach the descs to this list (output parameter) + * + * Return: number of descs allocated from free list. + */ +uint16_t dp_rx_get_free_desc_list(struct dp_soc *soc, uint32_t pool_id, + uint16_t num_descs, + union dp_rx_desc_list_elem_t **desc_list, + union dp_rx_desc_list_elem_t **tail) +{ + uint16_t count; + + qdf_spin_lock_bh(&soc->rx_desc_mutex[pool_id]); + *desc_list = soc->rx_desc[pool_id].freelist; + + if (!(*desc_list)) { + qdf_spin_unlock_bh(&soc->rx_desc_mutex[pool_id]); + return 0; + } + + for (count = 0; count < num_descs; count++) { + + *tail = soc->rx_desc[pool_id].freelist; + soc->rx_desc[pool_id].freelist = + soc->rx_desc[pool_id].freelist->next; + if (qdf_unlikely(!soc->rx_desc[pool_id].freelist)) { + qdf_spin_unlock_bh(&soc->rx_desc_mutex[pool_id]); + return count; + } + } + qdf_spin_unlock_bh(&soc->rx_desc_mutex[pool_id]); + return count; +} + +/* + * dp_rx_add_desc_list_to_free_list() - append unused desc_list back to + * freelist. + * + * @soc: core txrx main context + * @local_desc_list: local desc list provided by the caller (output param) + * @pool_id: pool_id which is one of 3 mac_ids + */ +void dp_rx_add_desc_list_to_free_list(struct dp_soc *soc, + union dp_rx_desc_list_elem_t **local_desc_list, + union dp_rx_desc_list_elem_t **tail, + uint16_t pool_id) +{ + union dp_rx_desc_list_elem_t *temp_list = NULL; + + qdf_spin_lock_bh(&soc->rx_desc_mutex[pool_id]); + + temp_list = soc->rx_desc[pool_id].freelist; + qdf_print( + "temp_list: %p, *local_desc_list: %p, *tail: %p (*tail)->next: %p\n", + temp_list, *local_desc_list, *tail, (*tail)->next); + + soc->rx_desc[pool_id].freelist = *local_desc_list; + (*tail)->next = temp_list; + + qdf_spin_unlock_bh(&soc->rx_desc_mutex[pool_id]); +}