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7daa6bf3 JB |
1 | /******************************************************************************* |
2 | * | |
3 | * Intel Ethernet Controller XL710 Family Linux Driver | |
dc641b73 | 4 | * Copyright(c) 2013 - 2014 Intel Corporation. |
7daa6bf3 JB |
5 | * |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
dc641b73 GR |
15 | * You should have received a copy of the GNU General Public License along |
16 | * with this program. If not, see <http://www.gnu.org/licenses/>. | |
7daa6bf3 JB |
17 | * |
18 | * The full GNU General Public License is included in this distribution in | |
19 | * the file called "COPYING". | |
20 | * | |
21 | * Contact Information: | |
22 | * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net> | |
23 | * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497 | |
24 | * | |
25 | ******************************************************************************/ | |
26 | ||
36fac581 VD |
27 | #ifndef _I40E_TXRX_H_ |
28 | #define _I40E_TXRX_H_ | |
29 | ||
aee8087f | 30 | /* Interrupt Throttling and Rate Limiting Goodies */ |
7daa6bf3 | 31 | |
3126dcb7 | 32 | #define I40E_MAX_ITR 0x0FF0 /* reg uses 2 usec resolution */ |
79442d38 | 33 | #define I40E_MIN_ITR 0x0001 /* reg uses 2 usec resolution */ |
7daa6bf3 JB |
34 | #define I40E_ITR_100K 0x0005 |
35 | #define I40E_ITR_20K 0x0019 | |
36 | #define I40E_ITR_8K 0x003E | |
37 | #define I40E_ITR_4K 0x007A | |
38 | #define I40E_ITR_RX_DEF I40E_ITR_8K | |
39 | #define I40E_ITR_TX_DEF I40E_ITR_4K | |
40 | #define I40E_ITR_DYNAMIC 0x8000 /* use top bit as a flag */ | |
41 | #define I40E_MIN_INT_RATE 250 /* ~= 1000000 / (I40E_MAX_ITR * 2) */ | |
42 | #define I40E_MAX_INT_RATE 500000 /* == 1000000 / (I40E_MIN_ITR * 2) */ | |
43 | #define I40E_DEFAULT_IRQ_WORK 256 | |
44 | #define ITR_TO_REG(setting) ((setting & ~I40E_ITR_DYNAMIC) >> 1) | |
45 | #define ITR_IS_DYNAMIC(setting) (!!(setting & I40E_ITR_DYNAMIC)) | |
46 | #define ITR_REG_TO_USEC(itr_reg) (itr_reg << 1) | |
47 | ||
48 | #define I40E_QUEUE_END_OF_LIST 0x7FF | |
49 | ||
0319577f JB |
50 | /* this enum matches hardware bits and is meant to be used by DYN_CTLN |
51 | * registers and QINT registers or more generally anywhere in the manual | |
52 | * mentioning ITR_INDX, ITR_NONE cannot be used as an index 'n' into any | |
53 | * register but instead is a special value meaning "don't update" ITR0/1/2. | |
54 | */ | |
55 | enum i40e_dyn_idx_t { | |
56 | I40E_IDX_ITR0 = 0, | |
57 | I40E_IDX_ITR1 = 1, | |
58 | I40E_IDX_ITR2 = 2, | |
59 | I40E_ITR_NONE = 3 /* ITR_NONE must not be used as an index */ | |
60 | }; | |
61 | ||
62 | /* these are indexes into ITRN registers */ | |
63 | #define I40E_RX_ITR I40E_IDX_ITR0 | |
64 | #define I40E_TX_ITR I40E_IDX_ITR1 | |
65 | #define I40E_PE_ITR I40E_IDX_ITR2 | |
66 | ||
12dc4fe3 MW |
67 | /* Supported RSS offloads */ |
68 | #define I40E_DEFAULT_RSS_HENA ( \ | |
41a1d04b JB |
69 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_UDP) | \ |
70 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_SCTP) | \ | |
71 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_TCP) | \ | |
72 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_OTHER) | \ | |
73 | BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV4) | \ | |
74 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_UDP) | \ | |
75 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_TCP) | \ | |
76 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_SCTP) | \ | |
77 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_OTHER) | \ | |
78 | BIT_ULL(I40E_FILTER_PCTYPE_FRAG_IPV6) | \ | |
79 | BIT_ULL(I40E_FILTER_PCTYPE_L2_PAYLOAD)) | |
12dc4fe3 | 80 | |
e25d00b8 | 81 | #define I40E_DEFAULT_RSS_HENA_EXPANDED (I40E_DEFAULT_RSS_HENA | \ |
9c70d7ce JB |
82 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV4_TCP_SYN_NO_ACK) | \ |
83 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_UNICAST_IPV4_UDP) | \ | |
84 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV4_UDP) | \ | |
85 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_IPV6_TCP_SYN_NO_ACK) | \ | |
86 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_UNICAST_IPV6_UDP) | \ | |
87 | BIT_ULL(I40E_FILTER_PCTYPE_NONF_MULTICAST_IPV6_UDP)) | |
e25d00b8 ASJ |
88 | |
89 | #define i40e_pf_get_default_rss_hena(pf) \ | |
90 | (((pf)->flags & I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE) ? \ | |
91 | I40E_DEFAULT_RSS_HENA_EXPANDED : I40E_DEFAULT_RSS_HENA) | |
92 | ||
7daa6bf3 JB |
93 | /* Supported Rx Buffer Sizes */ |
94 | #define I40E_RXBUFFER_512 512 /* Used for packet split */ | |
95 | #define I40E_RXBUFFER_2048 2048 | |
96 | #define I40E_RXBUFFER_3072 3072 /* For FCoE MTU of 2158 */ | |
97 | #define I40E_RXBUFFER_4096 4096 | |
98 | #define I40E_RXBUFFER_8192 8192 | |
99 | #define I40E_MAX_RXBUFFER 9728 /* largest size for single descriptor */ | |
100 | ||
101 | /* NOTE: netdev_alloc_skb reserves up to 64 bytes, NET_IP_ALIGN means we | |
102 | * reserve 2 more, and skb_shared_info adds an additional 384 bytes more, | |
103 | * this adds up to 512 bytes of extra data meaning the smallest allocation | |
104 | * we could have is 1K. | |
105 | * i.e. RXBUFFER_512 --> size-1024 slab | |
106 | */ | |
107 | #define I40E_RX_HDR_SIZE I40E_RXBUFFER_512 | |
108 | ||
109 | /* How many Rx Buffers do we bundle into one write to the hardware ? */ | |
110 | #define I40E_RX_BUFFER_WRITE 16 /* Must be power of 2 */ | |
a132af24 MW |
111 | #define I40E_RX_INCREMENT(r, i) \ |
112 | do { \ | |
113 | (i)++; \ | |
114 | if ((i) == (r)->count) \ | |
115 | i = 0; \ | |
116 | r->next_to_clean = i; \ | |
117 | } while (0) | |
118 | ||
7daa6bf3 JB |
119 | #define I40E_RX_NEXT_DESC(r, i, n) \ |
120 | do { \ | |
121 | (i)++; \ | |
122 | if ((i) == (r)->count) \ | |
123 | i = 0; \ | |
124 | (n) = I40E_RX_DESC((r), (i)); \ | |
125 | } while (0) | |
126 | ||
127 | #define I40E_RX_NEXT_DESC_PREFETCH(r, i, n) \ | |
128 | do { \ | |
129 | I40E_RX_NEXT_DESC((r), (i), (n)); \ | |
130 | prefetch((n)); \ | |
131 | } while (0) | |
132 | ||
133 | #define i40e_rx_desc i40e_32byte_rx_desc | |
134 | ||
71da6197 | 135 | #define I40E_MAX_BUFFER_TXD 8 |
7daa6bf3 | 136 | #define I40E_MIN_TX_LEN 17 |
980093eb | 137 | #define I40E_MAX_DATA_PER_TXD 8192 |
7daa6bf3 JB |
138 | |
139 | /* Tx Descriptors needed, worst case */ | |
140 | #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), I40E_MAX_DATA_PER_TXD) | |
980093eb | 141 | #define DESC_NEEDED (MAX_SKB_FRAGS + 4) |
810b3ae4 | 142 | #define I40E_MIN_DESC_PENDING 4 |
7daa6bf3 | 143 | |
41a1d04b JB |
144 | #define I40E_TX_FLAGS_CSUM BIT(0) |
145 | #define I40E_TX_FLAGS_HW_VLAN BIT(1) | |
146 | #define I40E_TX_FLAGS_SW_VLAN BIT(2) | |
147 | #define I40E_TX_FLAGS_TSO BIT(3) | |
148 | #define I40E_TX_FLAGS_IPV4 BIT(4) | |
149 | #define I40E_TX_FLAGS_IPV6 BIT(5) | |
150 | #define I40E_TX_FLAGS_FCCRC BIT(6) | |
151 | #define I40E_TX_FLAGS_FSO BIT(7) | |
152 | #define I40E_TX_FLAGS_TSYN BIT(8) | |
153 | #define I40E_TX_FLAGS_FD_SB BIT(9) | |
154 | #define I40E_TX_FLAGS_VXLAN_TUNNEL BIT(10) | |
7daa6bf3 JB |
155 | #define I40E_TX_FLAGS_VLAN_MASK 0xffff0000 |
156 | #define I40E_TX_FLAGS_VLAN_PRIO_MASK 0xe0000000 | |
157 | #define I40E_TX_FLAGS_VLAN_PRIO_SHIFT 29 | |
158 | #define I40E_TX_FLAGS_VLAN_SHIFT 16 | |
159 | ||
160 | struct i40e_tx_buffer { | |
7daa6bf3 | 161 | struct i40e_tx_desc *next_to_watch; |
49d7d933 ASJ |
162 | union { |
163 | struct sk_buff *skb; | |
164 | void *raw_buf; | |
165 | }; | |
7daa6bf3 | 166 | unsigned int bytecount; |
35a1e2ad | 167 | unsigned short gso_segs; |
6995b36c | 168 | |
35a1e2ad AD |
169 | DEFINE_DMA_UNMAP_ADDR(dma); |
170 | DEFINE_DMA_UNMAP_LEN(len); | |
171 | u32 tx_flags; | |
7daa6bf3 JB |
172 | }; |
173 | ||
174 | struct i40e_rx_buffer { | |
175 | struct sk_buff *skb; | |
a132af24 | 176 | void *hdr_buf; |
7daa6bf3 JB |
177 | dma_addr_t dma; |
178 | struct page *page; | |
179 | dma_addr_t page_dma; | |
180 | unsigned int page_offset; | |
181 | }; | |
182 | ||
a114d0a6 | 183 | struct i40e_queue_stats { |
7daa6bf3 JB |
184 | u64 packets; |
185 | u64 bytes; | |
a114d0a6 AD |
186 | }; |
187 | ||
188 | struct i40e_tx_queue_stats { | |
7daa6bf3 JB |
189 | u64 restart_queue; |
190 | u64 tx_busy; | |
7daa6bf3 | 191 | u64 tx_done_old; |
2fc3d715 | 192 | u64 tx_linearize; |
7daa6bf3 JB |
193 | }; |
194 | ||
195 | struct i40e_rx_queue_stats { | |
7daa6bf3 | 196 | u64 non_eop_descs; |
420136cc MW |
197 | u64 alloc_page_failed; |
198 | u64 alloc_buff_failed; | |
7daa6bf3 JB |
199 | }; |
200 | ||
201 | enum i40e_ring_state_t { | |
202 | __I40E_TX_FDIR_INIT_DONE, | |
203 | __I40E_TX_XPS_INIT_DONE, | |
7daa6bf3 | 204 | __I40E_RX_PS_ENABLED, |
7daa6bf3 JB |
205 | __I40E_RX_16BYTE_DESC_ENABLED, |
206 | }; | |
207 | ||
208 | #define ring_is_ps_enabled(ring) \ | |
209 | test_bit(__I40E_RX_PS_ENABLED, &(ring)->state) | |
210 | #define set_ring_ps_enabled(ring) \ | |
211 | set_bit(__I40E_RX_PS_ENABLED, &(ring)->state) | |
212 | #define clear_ring_ps_enabled(ring) \ | |
213 | clear_bit(__I40E_RX_PS_ENABLED, &(ring)->state) | |
7daa6bf3 JB |
214 | #define ring_is_16byte_desc_enabled(ring) \ |
215 | test_bit(__I40E_RX_16BYTE_DESC_ENABLED, &(ring)->state) | |
216 | #define set_ring_16byte_desc_enabled(ring) \ | |
217 | set_bit(__I40E_RX_16BYTE_DESC_ENABLED, &(ring)->state) | |
218 | #define clear_ring_16byte_desc_enabled(ring) \ | |
219 | clear_bit(__I40E_RX_16BYTE_DESC_ENABLED, &(ring)->state) | |
220 | ||
221 | /* struct that defines a descriptor ring, associated with a VSI */ | |
222 | struct i40e_ring { | |
cd0b6fa6 | 223 | struct i40e_ring *next; /* pointer to next ring in q_vector */ |
7daa6bf3 JB |
224 | void *desc; /* Descriptor ring memory */ |
225 | struct device *dev; /* Used for DMA mapping */ | |
226 | struct net_device *netdev; /* netdev ring maps to */ | |
227 | union { | |
228 | struct i40e_tx_buffer *tx_bi; | |
229 | struct i40e_rx_buffer *rx_bi; | |
230 | }; | |
231 | unsigned long state; | |
232 | u16 queue_index; /* Queue number of ring */ | |
233 | u8 dcb_tc; /* Traffic class of ring */ | |
234 | u8 __iomem *tail; | |
235 | ||
236 | u16 count; /* Number of descriptors */ | |
237 | u16 reg_idx; /* HW register index of the ring */ | |
238 | u16 rx_hdr_len; | |
239 | u16 rx_buf_len; | |
240 | u8 dtype; | |
241 | #define I40E_RX_DTYPE_NO_SPLIT 0 | |
a132af24 MW |
242 | #define I40E_RX_DTYPE_HEADER_SPLIT 1 |
243 | #define I40E_RX_DTYPE_SPLIT_ALWAYS 2 | |
7daa6bf3 JB |
244 | u8 hsplit; |
245 | #define I40E_RX_SPLIT_L2 0x1 | |
246 | #define I40E_RX_SPLIT_IP 0x2 | |
247 | #define I40E_RX_SPLIT_TCP_UDP 0x4 | |
248 | #define I40E_RX_SPLIT_SCTP 0x8 | |
249 | ||
250 | /* used in interrupt processing */ | |
251 | u16 next_to_use; | |
252 | u16 next_to_clean; | |
253 | ||
254 | u8 atr_sample_rate; | |
255 | u8 atr_count; | |
256 | ||
beb0dff1 JK |
257 | unsigned long last_rx_timestamp; |
258 | ||
7daa6bf3 | 259 | bool ring_active; /* is ring online or not */ |
d91649f5 | 260 | bool arm_wb; /* do something to arm write back */ |
58044743 | 261 | u8 packet_stride; |
7daa6bf3 | 262 | |
8e0764b4 ASJ |
263 | u16 flags; |
264 | #define I40E_TXR_FLAGS_WB_ON_ITR BIT(0) | |
527274c7 | 265 | #define I40E_TXR_FLAGS_OUTER_UDP_CSUM BIT(1) |
58044743 | 266 | #define I40E_TXR_FLAGS_LAST_XMIT_MORE_SET BIT(2) |
527274c7 | 267 | |
7daa6bf3 | 268 | /* stats structs */ |
a114d0a6 | 269 | struct i40e_queue_stats stats; |
980e9b11 | 270 | struct u64_stats_sync syncp; |
7daa6bf3 JB |
271 | union { |
272 | struct i40e_tx_queue_stats tx_stats; | |
273 | struct i40e_rx_queue_stats rx_stats; | |
274 | }; | |
275 | ||
276 | unsigned int size; /* length of descriptor ring in bytes */ | |
277 | dma_addr_t dma; /* physical address of ring */ | |
278 | ||
279 | struct i40e_vsi *vsi; /* Backreference to associated VSI */ | |
280 | struct i40e_q_vector *q_vector; /* Backreference to associated vector */ | |
9f65e15b AD |
281 | |
282 | struct rcu_head rcu; /* to avoid race on free */ | |
7daa6bf3 JB |
283 | } ____cacheline_internodealigned_in_smp; |
284 | ||
285 | enum i40e_latency_range { | |
286 | I40E_LOWEST_LATENCY = 0, | |
287 | I40E_LOW_LATENCY = 1, | |
288 | I40E_BULK_LATENCY = 2, | |
289 | }; | |
290 | ||
291 | struct i40e_ring_container { | |
7daa6bf3 | 292 | /* array of pointers to rings */ |
cd0b6fa6 | 293 | struct i40e_ring *ring; |
7daa6bf3 JB |
294 | unsigned int total_bytes; /* total bytes processed this int */ |
295 | unsigned int total_packets; /* total packets processed this int */ | |
296 | u16 count; | |
297 | enum i40e_latency_range latency_range; | |
298 | u16 itr; | |
299 | }; | |
300 | ||
cd0b6fa6 AD |
301 | /* iterator for handling rings in ring container */ |
302 | #define i40e_for_each_ring(pos, head) \ | |
303 | for (pos = (head).ring; pos != NULL; pos = pos->next) | |
304 | ||
a132af24 MW |
305 | void i40e_alloc_rx_buffers_ps(struct i40e_ring *rxr, u16 cleaned_count); |
306 | void i40e_alloc_rx_buffers_1buf(struct i40e_ring *rxr, u16 cleaned_count); | |
307 | void i40e_alloc_rx_headers(struct i40e_ring *rxr); | |
7daa6bf3 JB |
308 | netdev_tx_t i40e_lan_xmit_frame(struct sk_buff *skb, struct net_device *netdev); |
309 | void i40e_clean_tx_ring(struct i40e_ring *tx_ring); | |
310 | void i40e_clean_rx_ring(struct i40e_ring *rx_ring); | |
311 | int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring); | |
312 | int i40e_setup_rx_descriptors(struct i40e_ring *rx_ring); | |
313 | void i40e_free_tx_resources(struct i40e_ring *tx_ring); | |
314 | void i40e_free_rx_resources(struct i40e_ring *rx_ring); | |
315 | int i40e_napi_poll(struct napi_struct *napi, int budget); | |
38e00438 VD |
316 | #ifdef I40E_FCOE |
317 | void i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb, | |
318 | struct i40e_tx_buffer *first, u32 tx_flags, | |
319 | const u8 hdr_len, u32 td_cmd, u32 td_offset); | |
320 | int i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size); | |
321 | int i40e_xmit_descriptor_count(struct sk_buff *skb, struct i40e_ring *tx_ring); | |
322 | int i40e_tx_prepare_vlan_flags(struct sk_buff *skb, | |
323 | struct i40e_ring *tx_ring, u32 *flags); | |
324 | #endif | |
b03a8c1f KP |
325 | void i40e_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector); |
326 | u32 i40e_get_tx_pending(struct i40e_ring *ring); | |
1e6d6f8c KP |
327 | |
328 | /** | |
329 | * i40e_get_head - Retrieve head from head writeback | |
330 | * @tx_ring: tx ring to fetch head of | |
331 | * | |
332 | * Returns value of Tx ring head based on value stored | |
333 | * in head write-back location | |
334 | **/ | |
335 | static inline u32 i40e_get_head(struct i40e_ring *tx_ring) | |
336 | { | |
337 | void *head = (struct i40e_tx_desc *)tx_ring->desc + tx_ring->count; | |
338 | ||
339 | return le32_to_cpu(*(volatile __le32 *)head); | |
340 | } | |
36fac581 | 341 | #endif /* _I40E_TXRX_H_ */ |