diff options
Diffstat (limited to 'drivers/net/ethernet/qlogic/qed/qed_ll2.h')
| -rw-r--r-- | drivers/net/ethernet/qlogic/qed/qed_ll2.h | 268 |
1 files changed, 268 insertions, 0 deletions
diff --git a/drivers/net/ethernet/qlogic/qed/qed_ll2.h b/drivers/net/ethernet/qlogic/qed/qed_ll2.h new file mode 100644 index 000000000..f65817012 --- /dev/null +++ b/drivers/net/ethernet/qlogic/qed/qed_ll2.h @@ -0,0 +1,268 @@ +/* QLogic qed NIC Driver + * Copyright (c) 2015-2017 QLogic Corporation + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and /or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#ifndef _QED_LL2_H +#define _QED_LL2_H + +#include <linux/types.h> +#include <linux/kernel.h> +#include <linux/list.h> +#include <linux/mutex.h> +#include <linux/slab.h> +#include <linux/spinlock.h> +#include <linux/qed/qed_chain.h> +#include <linux/qed/qed_ll2_if.h> +#include "qed.h" +#include "qed_hsi.h" +#include "qed_sp.h" + +#define QED_MAX_NUM_OF_LL2_CONNECTIONS (4) + +struct qed_ll2_rx_packet { + struct list_head list_entry; + struct core_rx_bd_with_buff_len *rxq_bd; + dma_addr_t rx_buf_addr; + u16 buf_length; + void *cookie; + u8 placement_offset; + u16 parse_flags; + u16 packet_length; + u16 vlan; + u32 opaque_data[2]; +}; + +struct qed_ll2_tx_packet { + struct list_head list_entry; + u16 bd_used; + bool notify_fw; + void *cookie; + /* Flexible Array of bds_set determined by max_bds_per_packet */ + struct { + struct core_tx_bd *txq_bd; + dma_addr_t tx_frag; + u16 frag_len; + } bds_set[1]; +}; + +struct qed_ll2_rx_queue { + /* Lock protecting the Rx queue manipulation */ + spinlock_t lock; + struct qed_chain rxq_chain; + struct qed_chain rcq_chain; + u8 rx_sb_index; + bool b_cb_registred; + __le16 *p_fw_cons; + struct list_head active_descq; + struct list_head free_descq; + struct list_head posting_descq; + struct qed_ll2_rx_packet *descq_array; + void __iomem *set_prod_addr; +}; + +struct qed_ll2_tx_queue { + /* Lock protecting the Tx queue manipulation */ + spinlock_t lock; + struct qed_chain txq_chain; + u8 tx_sb_index; + bool b_cb_registred; + __le16 *p_fw_cons; + struct list_head active_descq; + struct list_head free_descq; + struct list_head sending_descq; + void *descq_mem; /* memory for variable sized qed_ll2_tx_packet*/ + struct qed_ll2_tx_packet *cur_send_packet; + struct qed_ll2_tx_packet cur_completing_packet; + u16 cur_completing_bd_idx; + void __iomem *doorbell_addr; + u16 bds_idx; + u16 cur_send_frag_num; + u16 cur_completing_frag_num; + bool b_completing_packet; +}; + +struct qed_ll2_info { + /* Lock protecting the state of LL2 */ + struct mutex mutex; + + struct qed_ll2_acquire_data_inputs input; + u32 cid; + u8 my_id; + u8 queue_id; + u8 tx_stats_id; + bool b_active; + enum core_tx_dest tx_dest; + u8 tx_stats_en; + bool main_func_queue; + struct qed_ll2_rx_queue rx_queue; + struct qed_ll2_tx_queue tx_queue; + struct qed_ll2_cbs cbs; +}; + +/** + * @brief qed_ll2_acquire_connection - allocate resources, + * starts rx & tx (if relevant) queues pair. Provides + * connecion handler as output parameter. + * + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param data - describes connection parameters + * @return int + */ +int qed_ll2_acquire_connection(void *cxt, struct qed_ll2_acquire_data *data); + +/** + * @brief qed_ll2_establish_connection - start previously + * allocated LL2 queues pair + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param p_ptt + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_establish_connection(void *cxt, u8 connection_handle); + +/** + * @brief qed_ll2_post_rx_buffers - submit buffers to LL2 Rx queue. + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + * @param addr rx (physical address) buffers to submit + * @param cookie + * @param notify_fw produce corresponding Rx BD immediately + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_post_rx_buffer(void *cxt, + u8 connection_handle, + dma_addr_t addr, + u16 buf_len, void *cookie, u8 notify_fw); + +/** + * @brief qed_ll2_prepare_tx_packet - request for start Tx BD + * to prepare Tx packet submission to FW. + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param connection_handle + * @param pkt - info regarding the tx packet + * @param notify_fw - issue doorbell to fw for this packet + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_prepare_tx_packet(void *cxt, + u8 connection_handle, + struct qed_ll2_tx_pkt_info *pkt, + bool notify_fw); + +/** + * @brief qed_ll2_release_connection - releases resources + * allocated for LL2 connection + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + */ +void qed_ll2_release_connection(void *cxt, u8 connection_handle); + +/** + * @brief qed_ll2_set_fragment_of_tx_packet - provides fragments to fill + * Tx BD of BDs requested by + * qed_ll2_prepare_tx_packet + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param connection_handle LL2 connection's handle + * obtained from + * qed_ll2_require_connection + * @param addr + * @param nbytes + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_set_fragment_of_tx_packet(void *cxt, + u8 connection_handle, + dma_addr_t addr, u16 nbytes); + +/** + * @brief qed_ll2_terminate_connection - stops Tx/Rx queues + * + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param connection_handle LL2 connection's handle + * obtained from + * qed_ll2_require_connection + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_terminate_connection(void *cxt, u8 connection_handle); + +/** + * @brief qed_ll2_get_stats - get LL2 queue's statistics + * + * + * @param cxt - pointer to the hw-function [opaque to some] + * @param connection_handle LL2 connection's handle obtained from + * qed_ll2_require_connection + * @param p_stats + * + * @return 0 on success, failure otherwise + */ +int qed_ll2_get_stats(void *cxt, + u8 connection_handle, struct qed_ll2_stats *p_stats); + +/** + * @brief qed_ll2_alloc - Allocates LL2 connections set + * + * @param p_hwfn + * + * @return int + */ +int qed_ll2_alloc(struct qed_hwfn *p_hwfn); + +/** + * @brief qed_ll2_setup - Inits LL2 connections set + * + * @param p_hwfn + * + */ +void qed_ll2_setup(struct qed_hwfn *p_hwfn); + +/** + * @brief qed_ll2_free - Releases LL2 connections set + * + * @param p_hwfn + * + */ +void qed_ll2_free(struct qed_hwfn *p_hwfn); + +#endif |