1 /* SPDX-License-Identifier: (GPL-2.0-only OR BSD-3-Clause) */
2 /* QLogic qed NIC Driver
3 * Copyright (c) 2015-2017 QLogic Corporation
4 * Copyright (c) 2019-2020 Marvell International Ltd.
10 #include <linux/types.h>
11 #include <linux/interrupt.h>
12 #include <linux/netdevice.h>
13 #include <linux/pci.h>
14 #include <linux/skbuff.h>
15 #include <linux/version.h>
16 #include <linux/kernel.h>
17 #include <linux/slab.h>
18 #include <linux/qed/qed_if.h>
20 enum qed_ll2_conn_type {
25 QED_LL2_TYPE_RESERVED2,
28 QED_LL2_TYPE_RESERVED3,
32 enum qed_ll2_rx_conn_type {
33 QED_LL2_RX_TYPE_LEGACY,
35 MAX_QED_LL2_RX_CONN_TYPE
38 enum qed_ll2_roce_flavor_type {
41 MAX_QED_LL2_ROCE_FLAVOR_TYPE
44 enum qed_ll2_tx_dest {
45 QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
46 QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
47 QED_LL2_TX_DEST_DROP, /* Light L2 Drop the TX packet */
51 enum qed_ll2_error_handle {
57 struct qed_ll2_stats {
59 u64 gsi_invalid_pkt_length;
60 u64 gsi_unsupported_pkt_typ;
61 u64 gsi_crcchksm_error;
63 u64 packet_too_big_discard;
81 struct qed_ll2_comp_rx_data {
83 dma_addr_t rx_buf_addr;
104 u8 data_length_error;
109 void (*qed_ll2_complete_rx_packet_cb)(void *cxt,
110 struct qed_ll2_comp_rx_data *data);
113 void (*qed_ll2_release_rx_packet_cb)(void *cxt,
114 u8 connection_handle,
116 dma_addr_t rx_buf_addr,
120 void (*qed_ll2_complete_tx_packet_cb)(void *cxt,
121 u8 connection_handle,
123 dma_addr_t first_frag_addr,
124 bool b_last_fragment,
128 void (*qed_ll2_release_tx_packet_cb)(void *cxt,
129 u8 connection_handle,
131 dma_addr_t first_frag_addr,
132 bool b_last_fragment, bool b_last_packet);
135 void (*qed_ll2_slowpath_cb)(void *cxt, u8 connection_handle,
136 u32 opaque_data_0, u32 opaque_data_1);
139 qed_ll2_complete_rx_packet_cb rx_comp_cb;
140 qed_ll2_release_rx_packet_cb rx_release_cb;
141 qed_ll2_complete_tx_packet_cb tx_comp_cb;
142 qed_ll2_release_tx_packet_cb tx_release_cb;
143 qed_ll2_slowpath_cb slowpath_cb;
147 struct qed_ll2_acquire_data_inputs {
148 enum qed_ll2_rx_conn_type rx_conn_type;
149 enum qed_ll2_conn_type conn_type;
152 u16 rx_num_ooo_buffers;
154 u8 rx_vlan_removal_en;
156 u8 tx_max_bds_per_packet;
158 enum qed_ll2_tx_dest tx_dest;
159 enum qed_ll2_error_handle ai_err_packet_too_big;
160 enum qed_ll2_error_handle ai_err_no_buf;
161 bool secondary_queue;
165 struct qed_ll2_acquire_data {
166 struct qed_ll2_acquire_data_inputs input;
167 const struct qed_ll2_cbs *cbs;
169 /* Output container for LL2 connection's handle */
170 u8 *p_connection_handle;
173 struct qed_ll2_tx_pkt_info {
175 dma_addr_t first_frag;
176 enum qed_ll2_tx_dest tx_dest;
177 enum qed_ll2_roce_flavor_type qed_roce_flavor;
179 u16 l4_hdr_offset_w; /* from start of packet */
183 bool enable_ip_cksum;
184 bool enable_l4_cksum;
189 #define QED_LL2_UNUSED_HANDLE (0xff)
191 struct qed_ll2_cb_ops {
192 int (*rx_cb)(void *, struct sk_buff *, u32, u32);
193 int (*tx_cb)(void *, struct sk_buff *, bool);
196 struct qed_ll2_params {
198 bool drop_ttl0_packets;
199 bool rx_vlan_stripping;
202 u8 ll2_mac_address[ETH_ALEN];
205 enum qed_ll2_xmit_flags {
206 /* FIP discovery packet */
207 QED_LL2_XMIT_FLAGS_FIP_DISCOVERY
212 * @brief start - initializes ll2
215 * @param params - protocol driver configuration for the ll2.
217 * @return 0 on success, otherwise error value.
219 int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params);
222 * @brief stop - stops the ll2
226 * @return 0 on success, otherwise error value.
228 int (*stop)(struct qed_dev *cdev);
231 * @brief start_xmit - transmits an skb over the ll2 interface
235 * @param xmit_flags - Transmit options defined by the enum qed_ll2_xmit_flags.
237 * @return 0 on success, otherwise error value.
239 int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb,
240 unsigned long xmit_flags);
243 * @brief register_cb_ops - protocol driver register the callback for Rx/Tx
244 * packets. Should be called before `start'.
247 * @param cookie - to be passed to the callback functions.
248 * @param ops - the callback functions to register for Rx / Tx.
250 * @return 0 on success, otherwise error value.
252 void (*register_cb_ops)(struct qed_dev *cdev,
253 const struct qed_ll2_cb_ops *ops,
257 * @brief get LL2 related statistics
260 * @param stats - pointer to struct that would be filled with stats
262 * @return 0 on success, error otherwise.
264 int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats);
267 #ifdef CONFIG_QED_LL2
268 int qed_ll2_alloc_if(struct qed_dev *);
269 void qed_ll2_dealloc_if(struct qed_dev *);
271 static const struct qed_ll2_ops qed_ll2_ops_pass = {
275 .register_cb_ops = NULL,
279 static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
284 static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)