1 /* QLogic qed NIC Driver
2 * Copyright (c) 2015-2017 QLogic Corporation
4 * This software is available to you under a choice of one of two
5 * licenses. You may choose to be licensed under the terms of the GNU
6 * General Public License (GPL) Version 2, available from the file
7 * COPYING in the main directory of this source tree, or the
8 * OpenIB.org BSD license below:
10 * Redistribution and use in source and binary forms, with or
11 * without modification, are permitted provided that the following
14 * - Redistributions of source code must retain the above
15 * copyright notice, this list of conditions and the following
18 * - Redistributions in binary form must reproduce the above
19 * copyright notice, this list of conditions and the following
20 * disclaimer in the documentation and /or other materials
21 * provided with the distribution.
23 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
24 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
25 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
26 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
27 * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
28 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
29 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
36 #include <linux/types.h>
37 #include <linux/interrupt.h>
38 #include <linux/netdevice.h>
39 #include <linux/pci.h>
40 #include <linux/skbuff.h>
41 #include <linux/version.h>
42 #include <linux/kernel.h>
43 #include <linux/slab.h>
44 #include <linux/qed/qed_if.h>
46 enum qed_ll2_conn_type {
51 QED_LL2_TYPE_RESERVED2,
54 QED_LL2_TYPE_RESERVED3,
55 MAX_QED_LL2_RX_CONN_TYPE
58 enum qed_ll2_roce_flavor_type {
61 MAX_QED_LL2_ROCE_FLAVOR_TYPE
64 enum qed_ll2_tx_dest {
65 QED_LL2_TX_DEST_NW, /* Light L2 TX Destination to the Network */
66 QED_LL2_TX_DEST_LB, /* Light L2 TX Destination to the Loopback */
70 enum qed_ll2_error_handle {
76 struct qed_ll2_stats {
78 u64 gsi_invalid_pkt_length;
79 u64 gsi_unsupported_pkt_typ;
80 u64 gsi_crcchksm_error;
82 u64 packet_too_big_discard;
100 struct qed_ll2_comp_rx_data {
102 dma_addr_t rx_buf_addr;
106 u8 connection_handle;
122 u8 data_length_error;
127 void (*qed_ll2_complete_rx_packet_cb)(void *cxt,
128 struct qed_ll2_comp_rx_data *data);
131 void (*qed_ll2_release_rx_packet_cb)(void *cxt,
132 u8 connection_handle,
134 dma_addr_t rx_buf_addr,
138 void (*qed_ll2_complete_tx_packet_cb)(void *cxt,
139 u8 connection_handle,
141 dma_addr_t first_frag_addr,
142 bool b_last_fragment,
146 void (*qed_ll2_release_tx_packet_cb)(void *cxt,
147 u8 connection_handle,
149 dma_addr_t first_frag_addr,
150 bool b_last_fragment, bool b_last_packet);
153 qed_ll2_complete_rx_packet_cb rx_comp_cb;
154 qed_ll2_release_rx_packet_cb rx_release_cb;
155 qed_ll2_complete_tx_packet_cb tx_comp_cb;
156 qed_ll2_release_tx_packet_cb tx_release_cb;
160 struct qed_ll2_acquire_data_inputs {
161 enum qed_ll2_conn_type conn_type;
164 u16 rx_num_ooo_buffers;
166 u8 rx_vlan_removal_en;
168 u8 tx_max_bds_per_packet;
170 enum qed_ll2_tx_dest tx_dest;
171 enum qed_ll2_error_handle ai_err_packet_too_big;
172 enum qed_ll2_error_handle ai_err_no_buf;
176 struct qed_ll2_acquire_data {
177 struct qed_ll2_acquire_data_inputs input;
178 const struct qed_ll2_cbs *cbs;
180 /* Output container for LL2 connection's handle */
181 u8 *p_connection_handle;
184 struct qed_ll2_tx_pkt_info {
186 dma_addr_t first_frag;
187 enum qed_ll2_tx_dest tx_dest;
188 enum qed_ll2_roce_flavor_type qed_roce_flavor;
190 u16 l4_hdr_offset_w; /* from start of packet */
194 bool enable_ip_cksum;
195 bool enable_l4_cksum;
199 #define QED_LL2_UNUSED_HANDLE (0xff)
201 struct qed_ll2_cb_ops {
202 int (*rx_cb)(void *, struct sk_buff *, u32, u32);
203 int (*tx_cb)(void *, struct sk_buff *, bool);
206 struct qed_ll2_params {
208 bool drop_ttl0_packets;
209 bool rx_vlan_stripping;
212 u8 ll2_mac_address[ETH_ALEN];
217 * @brief start - initializes ll2
220 * @param params - protocol driver configuration for the ll2.
222 * @return 0 on success, otherwise error value.
224 int (*start)(struct qed_dev *cdev, struct qed_ll2_params *params);
227 * @brief stop - stops the ll2
231 * @return 0 on success, otherwise error value.
233 int (*stop)(struct qed_dev *cdev);
236 * @brief start_xmit - transmits an skb over the ll2 interface
241 * @return 0 on success, otherwise error value.
243 int (*start_xmit)(struct qed_dev *cdev, struct sk_buff *skb);
246 * @brief register_cb_ops - protocol driver register the callback for Rx/Tx
247 * packets. Should be called before `start'.
250 * @param cookie - to be passed to the callback functions.
251 * @param ops - the callback functions to register for Rx / Tx.
253 * @return 0 on success, otherwise error value.
255 void (*register_cb_ops)(struct qed_dev *cdev,
256 const struct qed_ll2_cb_ops *ops,
260 * @brief get LL2 related statistics
263 * @param stats - pointer to struct that would be filled with stats
265 * @return 0 on success, error otherwise.
267 int (*get_stats)(struct qed_dev *cdev, struct qed_ll2_stats *stats);
270 #ifdef CONFIG_QED_LL2
271 int qed_ll2_alloc_if(struct qed_dev *);
272 void qed_ll2_dealloc_if(struct qed_dev *);
274 static const struct qed_ll2_ops qed_ll2_ops_pass = {
278 .register_cb_ops = NULL,
282 static inline int qed_ll2_alloc_if(struct qed_dev *cdev)
287 static inline void qed_ll2_dealloc_if(struct qed_dev *cdev)