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fd0a05ce JB |
1 | /******************************************************************************* |
2 | * | |
3 | * Intel Ethernet Controller XL710 Family Linux Driver | |
dc641b73 | 4 | * Copyright(c) 2013 - 2014 Intel Corporation. |
fd0a05ce 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/>. | |
fd0a05ce 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 | ||
1c112a64 | 27 | #include <linux/prefetch.h> |
a132af24 | 28 | #include <net/busy_poll.h> |
fd0a05ce | 29 | #include "i40e.h" |
206812b5 | 30 | #include "i40e_prototype.h" |
fd0a05ce JB |
31 | |
32 | static inline __le64 build_ctob(u32 td_cmd, u32 td_offset, unsigned int size, | |
33 | u32 td_tag) | |
34 | { | |
35 | return cpu_to_le64(I40E_TX_DESC_DTYPE_DATA | | |
36 | ((u64)td_cmd << I40E_TXD_QW1_CMD_SHIFT) | | |
37 | ((u64)td_offset << I40E_TXD_QW1_OFFSET_SHIFT) | | |
38 | ((u64)size << I40E_TXD_QW1_TX_BUF_SZ_SHIFT) | | |
39 | ((u64)td_tag << I40E_TXD_QW1_L2TAG1_SHIFT)); | |
40 | } | |
41 | ||
eaefbd06 | 42 | #define I40E_TXD_CMD (I40E_TX_DESC_CMD_EOP | I40E_TX_DESC_CMD_RS) |
49d7d933 | 43 | #define I40E_FD_CLEAN_DELAY 10 |
fd0a05ce JB |
44 | /** |
45 | * i40e_program_fdir_filter - Program a Flow Director filter | |
17a73f6b JG |
46 | * @fdir_data: Packet data that will be filter parameters |
47 | * @raw_packet: the pre-allocated packet buffer for FDir | |
b40c82e6 | 48 | * @pf: The PF pointer |
fd0a05ce JB |
49 | * @add: True for add/update, False for remove |
50 | **/ | |
17a73f6b | 51 | int i40e_program_fdir_filter(struct i40e_fdir_filter *fdir_data, u8 *raw_packet, |
fd0a05ce JB |
52 | struct i40e_pf *pf, bool add) |
53 | { | |
54 | struct i40e_filter_program_desc *fdir_desc; | |
49d7d933 | 55 | struct i40e_tx_buffer *tx_buf, *first; |
fd0a05ce JB |
56 | struct i40e_tx_desc *tx_desc; |
57 | struct i40e_ring *tx_ring; | |
eaefbd06 | 58 | unsigned int fpt, dcc; |
fd0a05ce JB |
59 | struct i40e_vsi *vsi; |
60 | struct device *dev; | |
61 | dma_addr_t dma; | |
62 | u32 td_cmd = 0; | |
49d7d933 | 63 | u16 delay = 0; |
fd0a05ce JB |
64 | u16 i; |
65 | ||
66 | /* find existing FDIR VSI */ | |
67 | vsi = NULL; | |
505682cd | 68 | for (i = 0; i < pf->num_alloc_vsi; i++) |
fd0a05ce JB |
69 | if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) |
70 | vsi = pf->vsi[i]; | |
71 | if (!vsi) | |
72 | return -ENOENT; | |
73 | ||
9f65e15b | 74 | tx_ring = vsi->tx_rings[0]; |
fd0a05ce JB |
75 | dev = tx_ring->dev; |
76 | ||
49d7d933 ASJ |
77 | /* we need two descriptors to add/del a filter and we can wait */ |
78 | do { | |
79 | if (I40E_DESC_UNUSED(tx_ring) > 1) | |
80 | break; | |
81 | msleep_interruptible(1); | |
82 | delay++; | |
83 | } while (delay < I40E_FD_CLEAN_DELAY); | |
84 | ||
85 | if (!(I40E_DESC_UNUSED(tx_ring) > 1)) | |
86 | return -EAGAIN; | |
87 | ||
17a73f6b JG |
88 | dma = dma_map_single(dev, raw_packet, |
89 | I40E_FDIR_MAX_RAW_PACKET_SIZE, DMA_TO_DEVICE); | |
fd0a05ce JB |
90 | if (dma_mapping_error(dev, dma)) |
91 | goto dma_fail; | |
92 | ||
93 | /* grab the next descriptor */ | |
fc4ac67b AD |
94 | i = tx_ring->next_to_use; |
95 | fdir_desc = I40E_TX_FDIRDESC(tx_ring, i); | |
49d7d933 ASJ |
96 | first = &tx_ring->tx_bi[i]; |
97 | memset(first, 0, sizeof(struct i40e_tx_buffer)); | |
fc4ac67b | 98 | |
49d7d933 | 99 | tx_ring->next_to_use = ((i + 1) < tx_ring->count) ? i + 1 : 0; |
fd0a05ce | 100 | |
eaefbd06 JB |
101 | fpt = (fdir_data->q_index << I40E_TXD_FLTR_QW0_QINDEX_SHIFT) & |
102 | I40E_TXD_FLTR_QW0_QINDEX_MASK; | |
fd0a05ce | 103 | |
eaefbd06 JB |
104 | fpt |= (fdir_data->flex_off << I40E_TXD_FLTR_QW0_FLEXOFF_SHIFT) & |
105 | I40E_TXD_FLTR_QW0_FLEXOFF_MASK; | |
fd0a05ce | 106 | |
eaefbd06 JB |
107 | fpt |= (fdir_data->pctype << I40E_TXD_FLTR_QW0_PCTYPE_SHIFT) & |
108 | I40E_TXD_FLTR_QW0_PCTYPE_MASK; | |
fd0a05ce JB |
109 | |
110 | /* Use LAN VSI Id if not programmed by user */ | |
111 | if (fdir_data->dest_vsi == 0) | |
eaefbd06 JB |
112 | fpt |= (pf->vsi[pf->lan_vsi]->id) << |
113 | I40E_TXD_FLTR_QW0_DEST_VSI_SHIFT; | |
fd0a05ce | 114 | else |
eaefbd06 JB |
115 | fpt |= ((u32)fdir_data->dest_vsi << |
116 | I40E_TXD_FLTR_QW0_DEST_VSI_SHIFT) & | |
117 | I40E_TXD_FLTR_QW0_DEST_VSI_MASK; | |
118 | ||
eaefbd06 | 119 | dcc = I40E_TX_DESC_DTYPE_FILTER_PROG; |
fd0a05ce JB |
120 | |
121 | if (add) | |
eaefbd06 JB |
122 | dcc |= I40E_FILTER_PROGRAM_DESC_PCMD_ADD_UPDATE << |
123 | I40E_TXD_FLTR_QW1_PCMD_SHIFT; | |
fd0a05ce | 124 | else |
eaefbd06 JB |
125 | dcc |= I40E_FILTER_PROGRAM_DESC_PCMD_REMOVE << |
126 | I40E_TXD_FLTR_QW1_PCMD_SHIFT; | |
fd0a05ce | 127 | |
eaefbd06 JB |
128 | dcc |= (fdir_data->dest_ctl << I40E_TXD_FLTR_QW1_DEST_SHIFT) & |
129 | I40E_TXD_FLTR_QW1_DEST_MASK; | |
fd0a05ce | 130 | |
eaefbd06 JB |
131 | dcc |= (fdir_data->fd_status << I40E_TXD_FLTR_QW1_FD_STATUS_SHIFT) & |
132 | I40E_TXD_FLTR_QW1_FD_STATUS_MASK; | |
fd0a05ce JB |
133 | |
134 | if (fdir_data->cnt_index != 0) { | |
eaefbd06 JB |
135 | dcc |= I40E_TXD_FLTR_QW1_CNT_ENA_MASK; |
136 | dcc |= ((u32)fdir_data->cnt_index << | |
137 | I40E_TXD_FLTR_QW1_CNTINDEX_SHIFT) & | |
433c47de | 138 | I40E_TXD_FLTR_QW1_CNTINDEX_MASK; |
fd0a05ce JB |
139 | } |
140 | ||
99753ea6 JB |
141 | fdir_desc->qindex_flex_ptype_vsi = cpu_to_le32(fpt); |
142 | fdir_desc->rsvd = cpu_to_le32(0); | |
eaefbd06 | 143 | fdir_desc->dtype_cmd_cntindex = cpu_to_le32(dcc); |
fd0a05ce JB |
144 | fdir_desc->fd_id = cpu_to_le32(fdir_data->fd_id); |
145 | ||
146 | /* Now program a dummy descriptor */ | |
fc4ac67b AD |
147 | i = tx_ring->next_to_use; |
148 | tx_desc = I40E_TX_DESC(tx_ring, i); | |
298deef1 | 149 | tx_buf = &tx_ring->tx_bi[i]; |
fc4ac67b | 150 | |
49d7d933 ASJ |
151 | tx_ring->next_to_use = ((i + 1) < tx_ring->count) ? i + 1 : 0; |
152 | ||
153 | memset(tx_buf, 0, sizeof(struct i40e_tx_buffer)); | |
fd0a05ce | 154 | |
298deef1 | 155 | /* record length, and DMA address */ |
17a73f6b | 156 | dma_unmap_len_set(tx_buf, len, I40E_FDIR_MAX_RAW_PACKET_SIZE); |
298deef1 ASJ |
157 | dma_unmap_addr_set(tx_buf, dma, dma); |
158 | ||
fd0a05ce | 159 | tx_desc->buffer_addr = cpu_to_le64(dma); |
eaefbd06 | 160 | td_cmd = I40E_TXD_CMD | I40E_TX_DESC_CMD_DUMMY; |
fd0a05ce | 161 | |
49d7d933 ASJ |
162 | tx_buf->tx_flags = I40E_TX_FLAGS_FD_SB; |
163 | tx_buf->raw_buf = (void *)raw_packet; | |
164 | ||
fd0a05ce | 165 | tx_desc->cmd_type_offset_bsz = |
17a73f6b | 166 | build_ctob(td_cmd, 0, I40E_FDIR_MAX_RAW_PACKET_SIZE, 0); |
fd0a05ce | 167 | |
298deef1 ASJ |
168 | /* set the timestamp */ |
169 | tx_buf->time_stamp = jiffies; | |
170 | ||
fd0a05ce | 171 | /* Force memory writes to complete before letting h/w |
49d7d933 | 172 | * know there are new descriptors to fetch. |
fd0a05ce JB |
173 | */ |
174 | wmb(); | |
175 | ||
fc4ac67b | 176 | /* Mark the data descriptor to be watched */ |
49d7d933 | 177 | first->next_to_watch = tx_desc; |
fc4ac67b | 178 | |
fd0a05ce JB |
179 | writel(tx_ring->next_to_use, tx_ring->tail); |
180 | return 0; | |
181 | ||
182 | dma_fail: | |
183 | return -1; | |
184 | } | |
185 | ||
17a73f6b JG |
186 | #define IP_HEADER_OFFSET 14 |
187 | #define I40E_UDPIP_DUMMY_PACKET_LEN 42 | |
188 | /** | |
189 | * i40e_add_del_fdir_udpv4 - Add/Remove UDPv4 filters | |
190 | * @vsi: pointer to the targeted VSI | |
191 | * @fd_data: the flow director data required for the FDir descriptor | |
17a73f6b JG |
192 | * @add: true adds a filter, false removes it |
193 | * | |
194 | * Returns 0 if the filters were successfully added or removed | |
195 | **/ | |
196 | static int i40e_add_del_fdir_udpv4(struct i40e_vsi *vsi, | |
197 | struct i40e_fdir_filter *fd_data, | |
49d7d933 | 198 | bool add) |
17a73f6b JG |
199 | { |
200 | struct i40e_pf *pf = vsi->back; | |
201 | struct udphdr *udp; | |
202 | struct iphdr *ip; | |
203 | bool err = false; | |
49d7d933 | 204 | u8 *raw_packet; |
17a73f6b | 205 | int ret; |
17a73f6b JG |
206 | static char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0, |
207 | 0x45, 0, 0, 0x1c, 0, 0, 0x40, 0, 0x40, 0x11, 0, 0, 0, 0, 0, 0, | |
208 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; | |
209 | ||
49d7d933 ASJ |
210 | raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); |
211 | if (!raw_packet) | |
212 | return -ENOMEM; | |
17a73f6b JG |
213 | memcpy(raw_packet, packet, I40E_UDPIP_DUMMY_PACKET_LEN); |
214 | ||
215 | ip = (struct iphdr *)(raw_packet + IP_HEADER_OFFSET); | |
216 | udp = (struct udphdr *)(raw_packet + IP_HEADER_OFFSET | |
217 | + sizeof(struct iphdr)); | |
218 | ||
219 | ip->daddr = fd_data->dst_ip[0]; | |
220 | udp->dest = fd_data->dst_port; | |
221 | ip->saddr = fd_data->src_ip[0]; | |
222 | udp->source = fd_data->src_port; | |
223 | ||
b2d36c03 KS |
224 | fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_UDP; |
225 | ret = i40e_program_fdir_filter(fd_data, raw_packet, pf, add); | |
226 | if (ret) { | |
227 | dev_info(&pf->pdev->dev, | |
e99bdd39 CW |
228 | "PCTYPE:%d, Filter command send failed for fd_id:%d (ret = %d)\n", |
229 | fd_data->pctype, fd_data->fd_id, ret); | |
b2d36c03 | 230 | err = true; |
4205d379 | 231 | } else if (I40E_DEBUG_FD & pf->hw.debug_mask) { |
f7233c54 ASJ |
232 | if (add) |
233 | dev_info(&pf->pdev->dev, | |
234 | "Filter OK for PCTYPE %d loc = %d\n", | |
235 | fd_data->pctype, fd_data->fd_id); | |
236 | else | |
237 | dev_info(&pf->pdev->dev, | |
238 | "Filter deleted for PCTYPE %d loc = %d\n", | |
239 | fd_data->pctype, fd_data->fd_id); | |
17a73f6b | 240 | } |
17a73f6b JG |
241 | return err ? -EOPNOTSUPP : 0; |
242 | } | |
243 | ||
244 | #define I40E_TCPIP_DUMMY_PACKET_LEN 54 | |
245 | /** | |
246 | * i40e_add_del_fdir_tcpv4 - Add/Remove TCPv4 filters | |
247 | * @vsi: pointer to the targeted VSI | |
248 | * @fd_data: the flow director data required for the FDir descriptor | |
17a73f6b JG |
249 | * @add: true adds a filter, false removes it |
250 | * | |
251 | * Returns 0 if the filters were successfully added or removed | |
252 | **/ | |
253 | static int i40e_add_del_fdir_tcpv4(struct i40e_vsi *vsi, | |
254 | struct i40e_fdir_filter *fd_data, | |
49d7d933 | 255 | bool add) |
17a73f6b JG |
256 | { |
257 | struct i40e_pf *pf = vsi->back; | |
258 | struct tcphdr *tcp; | |
259 | struct iphdr *ip; | |
260 | bool err = false; | |
49d7d933 | 261 | u8 *raw_packet; |
17a73f6b JG |
262 | int ret; |
263 | /* Dummy packet */ | |
264 | static char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0, | |
265 | 0x45, 0, 0, 0x28, 0, 0, 0x40, 0, 0x40, 0x6, 0, 0, 0, 0, 0, 0, | |
266 | 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x80, 0x11, | |
267 | 0x0, 0x72, 0, 0, 0, 0}; | |
268 | ||
49d7d933 ASJ |
269 | raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); |
270 | if (!raw_packet) | |
271 | return -ENOMEM; | |
17a73f6b JG |
272 | memcpy(raw_packet, packet, I40E_TCPIP_DUMMY_PACKET_LEN); |
273 | ||
274 | ip = (struct iphdr *)(raw_packet + IP_HEADER_OFFSET); | |
275 | tcp = (struct tcphdr *)(raw_packet + IP_HEADER_OFFSET | |
276 | + sizeof(struct iphdr)); | |
277 | ||
278 | ip->daddr = fd_data->dst_ip[0]; | |
279 | tcp->dest = fd_data->dst_port; | |
280 | ip->saddr = fd_data->src_ip[0]; | |
281 | tcp->source = fd_data->src_port; | |
282 | ||
283 | if (add) { | |
1e1be8f6 | 284 | pf->fd_tcp_rule++; |
17a73f6b JG |
285 | if (pf->flags & I40E_FLAG_FD_ATR_ENABLED) { |
286 | dev_info(&pf->pdev->dev, "Forcing ATR off, sideband rules for TCP/IPv4 flow being applied\n"); | |
287 | pf->flags &= ~I40E_FLAG_FD_ATR_ENABLED; | |
288 | } | |
1e1be8f6 ASJ |
289 | } else { |
290 | pf->fd_tcp_rule = (pf->fd_tcp_rule > 0) ? | |
291 | (pf->fd_tcp_rule - 1) : 0; | |
292 | if (pf->fd_tcp_rule == 0) { | |
293 | pf->flags |= I40E_FLAG_FD_ATR_ENABLED; | |
294 | dev_info(&pf->pdev->dev, "ATR re-enabled due to no sideband TCP/IPv4 rules\n"); | |
295 | } | |
17a73f6b JG |
296 | } |
297 | ||
b2d36c03 | 298 | fd_data->pctype = I40E_FILTER_PCTYPE_NONF_IPV4_TCP; |
17a73f6b JG |
299 | ret = i40e_program_fdir_filter(fd_data, raw_packet, pf, add); |
300 | ||
301 | if (ret) { | |
302 | dev_info(&pf->pdev->dev, | |
e99bdd39 CW |
303 | "PCTYPE:%d, Filter command send failed for fd_id:%d (ret = %d)\n", |
304 | fd_data->pctype, fd_data->fd_id, ret); | |
17a73f6b | 305 | err = true; |
4205d379 | 306 | } else if (I40E_DEBUG_FD & pf->hw.debug_mask) { |
f7233c54 ASJ |
307 | if (add) |
308 | dev_info(&pf->pdev->dev, "Filter OK for PCTYPE %d loc = %d)\n", | |
309 | fd_data->pctype, fd_data->fd_id); | |
310 | else | |
311 | dev_info(&pf->pdev->dev, | |
312 | "Filter deleted for PCTYPE %d loc = %d\n", | |
313 | fd_data->pctype, fd_data->fd_id); | |
17a73f6b JG |
314 | } |
315 | ||
17a73f6b JG |
316 | return err ? -EOPNOTSUPP : 0; |
317 | } | |
318 | ||
319 | /** | |
320 | * i40e_add_del_fdir_sctpv4 - Add/Remove SCTPv4 Flow Director filters for | |
321 | * a specific flow spec | |
322 | * @vsi: pointer to the targeted VSI | |
323 | * @fd_data: the flow director data required for the FDir descriptor | |
17a73f6b JG |
324 | * @add: true adds a filter, false removes it |
325 | * | |
21d3efdc | 326 | * Always returns -EOPNOTSUPP |
17a73f6b JG |
327 | **/ |
328 | static int i40e_add_del_fdir_sctpv4(struct i40e_vsi *vsi, | |
329 | struct i40e_fdir_filter *fd_data, | |
49d7d933 | 330 | bool add) |
17a73f6b JG |
331 | { |
332 | return -EOPNOTSUPP; | |
333 | } | |
334 | ||
335 | #define I40E_IP_DUMMY_PACKET_LEN 34 | |
336 | /** | |
337 | * i40e_add_del_fdir_ipv4 - Add/Remove IPv4 Flow Director filters for | |
338 | * a specific flow spec | |
339 | * @vsi: pointer to the targeted VSI | |
340 | * @fd_data: the flow director data required for the FDir descriptor | |
17a73f6b JG |
341 | * @add: true adds a filter, false removes it |
342 | * | |
343 | * Returns 0 if the filters were successfully added or removed | |
344 | **/ | |
345 | static int i40e_add_del_fdir_ipv4(struct i40e_vsi *vsi, | |
346 | struct i40e_fdir_filter *fd_data, | |
49d7d933 | 347 | bool add) |
17a73f6b JG |
348 | { |
349 | struct i40e_pf *pf = vsi->back; | |
350 | struct iphdr *ip; | |
351 | bool err = false; | |
49d7d933 | 352 | u8 *raw_packet; |
17a73f6b JG |
353 | int ret; |
354 | int i; | |
355 | static char packet[] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x08, 0, | |
356 | 0x45, 0, 0, 0x14, 0, 0, 0x40, 0, 0x40, 0x10, 0, 0, 0, 0, 0, 0, | |
357 | 0, 0, 0, 0}; | |
358 | ||
17a73f6b JG |
359 | for (i = I40E_FILTER_PCTYPE_NONF_IPV4_OTHER; |
360 | i <= I40E_FILTER_PCTYPE_FRAG_IPV4; i++) { | |
49d7d933 ASJ |
361 | raw_packet = kzalloc(I40E_FDIR_MAX_RAW_PACKET_SIZE, GFP_KERNEL); |
362 | if (!raw_packet) | |
363 | return -ENOMEM; | |
364 | memcpy(raw_packet, packet, I40E_IP_DUMMY_PACKET_LEN); | |
365 | ip = (struct iphdr *)(raw_packet + IP_HEADER_OFFSET); | |
366 | ||
367 | ip->saddr = fd_data->src_ip[0]; | |
368 | ip->daddr = fd_data->dst_ip[0]; | |
369 | ip->protocol = 0; | |
370 | ||
17a73f6b JG |
371 | fd_data->pctype = i; |
372 | ret = i40e_program_fdir_filter(fd_data, raw_packet, pf, add); | |
373 | ||
374 | if (ret) { | |
375 | dev_info(&pf->pdev->dev, | |
e99bdd39 CW |
376 | "PCTYPE:%d, Filter command send failed for fd_id:%d (ret = %d)\n", |
377 | fd_data->pctype, fd_data->fd_id, ret); | |
17a73f6b | 378 | err = true; |
4205d379 | 379 | } else if (I40E_DEBUG_FD & pf->hw.debug_mask) { |
f7233c54 ASJ |
380 | if (add) |
381 | dev_info(&pf->pdev->dev, | |
382 | "Filter OK for PCTYPE %d loc = %d\n", | |
383 | fd_data->pctype, fd_data->fd_id); | |
384 | else | |
385 | dev_info(&pf->pdev->dev, | |
386 | "Filter deleted for PCTYPE %d loc = %d\n", | |
387 | fd_data->pctype, fd_data->fd_id); | |
17a73f6b JG |
388 | } |
389 | } | |
390 | ||
391 | return err ? -EOPNOTSUPP : 0; | |
392 | } | |
393 | ||
394 | /** | |
395 | * i40e_add_del_fdir - Build raw packets to add/del fdir filter | |
396 | * @vsi: pointer to the targeted VSI | |
397 | * @cmd: command to get or set RX flow classification rules | |
398 | * @add: true adds a filter, false removes it | |
399 | * | |
400 | **/ | |
401 | int i40e_add_del_fdir(struct i40e_vsi *vsi, | |
402 | struct i40e_fdir_filter *input, bool add) | |
403 | { | |
404 | struct i40e_pf *pf = vsi->back; | |
17a73f6b JG |
405 | int ret; |
406 | ||
17a73f6b JG |
407 | switch (input->flow_type & ~FLOW_EXT) { |
408 | case TCP_V4_FLOW: | |
49d7d933 | 409 | ret = i40e_add_del_fdir_tcpv4(vsi, input, add); |
17a73f6b JG |
410 | break; |
411 | case UDP_V4_FLOW: | |
49d7d933 | 412 | ret = i40e_add_del_fdir_udpv4(vsi, input, add); |
17a73f6b JG |
413 | break; |
414 | case SCTP_V4_FLOW: | |
49d7d933 | 415 | ret = i40e_add_del_fdir_sctpv4(vsi, input, add); |
17a73f6b JG |
416 | break; |
417 | case IPV4_FLOW: | |
49d7d933 | 418 | ret = i40e_add_del_fdir_ipv4(vsi, input, add); |
17a73f6b JG |
419 | break; |
420 | case IP_USER_FLOW: | |
421 | switch (input->ip4_proto) { | |
422 | case IPPROTO_TCP: | |
49d7d933 | 423 | ret = i40e_add_del_fdir_tcpv4(vsi, input, add); |
17a73f6b JG |
424 | break; |
425 | case IPPROTO_UDP: | |
49d7d933 | 426 | ret = i40e_add_del_fdir_udpv4(vsi, input, add); |
17a73f6b JG |
427 | break; |
428 | case IPPROTO_SCTP: | |
49d7d933 | 429 | ret = i40e_add_del_fdir_sctpv4(vsi, input, add); |
17a73f6b JG |
430 | break; |
431 | default: | |
49d7d933 | 432 | ret = i40e_add_del_fdir_ipv4(vsi, input, add); |
17a73f6b JG |
433 | break; |
434 | } | |
435 | break; | |
436 | default: | |
c5ffe7e1 | 437 | dev_info(&pf->pdev->dev, "Could not specify spec type %d\n", |
17a73f6b JG |
438 | input->flow_type); |
439 | ret = -EINVAL; | |
440 | } | |
441 | ||
49d7d933 | 442 | /* The buffer allocated here is freed by the i40e_clean_tx_ring() */ |
17a73f6b JG |
443 | return ret; |
444 | } | |
445 | ||
fd0a05ce JB |
446 | /** |
447 | * i40e_fd_handle_status - check the Programming Status for FD | |
448 | * @rx_ring: the Rx ring for this descriptor | |
55a5e60b | 449 | * @rx_desc: the Rx descriptor for programming Status, not a packet descriptor. |
fd0a05ce JB |
450 | * @prog_id: the id originally used for programming |
451 | * | |
452 | * This is used to verify if the FD programming or invalidation | |
453 | * requested by SW to the HW is successful or not and take actions accordingly. | |
454 | **/ | |
55a5e60b ASJ |
455 | static void i40e_fd_handle_status(struct i40e_ring *rx_ring, |
456 | union i40e_rx_desc *rx_desc, u8 prog_id) | |
fd0a05ce | 457 | { |
55a5e60b ASJ |
458 | struct i40e_pf *pf = rx_ring->vsi->back; |
459 | struct pci_dev *pdev = pf->pdev; | |
460 | u32 fcnt_prog, fcnt_avail; | |
fd0a05ce | 461 | u32 error; |
55a5e60b | 462 | u64 qw; |
fd0a05ce | 463 | |
55a5e60b | 464 | qw = le64_to_cpu(rx_desc->wb.qword1.status_error_len); |
fd0a05ce JB |
465 | error = (qw & I40E_RX_PROG_STATUS_DESC_QW1_ERROR_MASK) >> |
466 | I40E_RX_PROG_STATUS_DESC_QW1_ERROR_SHIFT; | |
467 | ||
55a5e60b | 468 | if (error == (0x1 << I40E_RX_PROG_STATUS_DESC_FD_TBL_FULL_SHIFT)) { |
f7233c54 ASJ |
469 | if ((rx_desc->wb.qword0.hi_dword.fd_id != 0) || |
470 | (I40E_DEBUG_FD & pf->hw.debug_mask)) | |
471 | dev_warn(&pdev->dev, "ntuple filter loc = %d, could not be added\n", | |
472 | rx_desc->wb.qword0.hi_dword.fd_id); | |
55a5e60b | 473 | |
04294e38 ASJ |
474 | /* Check if the programming error is for ATR. |
475 | * If so, auto disable ATR and set a state for | |
476 | * flush in progress. Next time we come here if flush is in | |
477 | * progress do nothing, once flush is complete the state will | |
478 | * be cleared. | |
479 | */ | |
480 | if (test_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state)) | |
481 | return; | |
482 | ||
1e1be8f6 ASJ |
483 | pf->fd_add_err++; |
484 | /* store the current atr filter count */ | |
485 | pf->fd_atr_cnt = i40e_get_current_atr_cnt(pf); | |
486 | ||
04294e38 ASJ |
487 | if ((rx_desc->wb.qword0.hi_dword.fd_id == 0) && |
488 | (pf->auto_disable_flags & I40E_FLAG_FD_SB_ENABLED)) { | |
489 | pf->auto_disable_flags |= I40E_FLAG_FD_ATR_ENABLED; | |
490 | set_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state); | |
491 | } | |
492 | ||
55a5e60b | 493 | /* filter programming failed most likely due to table full */ |
04294e38 | 494 | fcnt_prog = i40e_get_global_fd_count(pf); |
12957388 | 495 | fcnt_avail = pf->fdir_pf_filter_count; |
55a5e60b ASJ |
496 | /* If ATR is running fcnt_prog can quickly change, |
497 | * if we are very close to full, it makes sense to disable | |
498 | * FD ATR/SB and then re-enable it when there is room. | |
499 | */ | |
500 | if (fcnt_prog >= (fcnt_avail - I40E_FDIR_BUFFER_FULL_MARGIN)) { | |
1e1be8f6 | 501 | if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) && |
b814ba65 | 502 | !(pf->auto_disable_flags & |
b814ba65 | 503 | I40E_FLAG_FD_SB_ENABLED)) { |
55a5e60b ASJ |
504 | dev_warn(&pdev->dev, "FD filter space full, new ntuple rules will not be added\n"); |
505 | pf->auto_disable_flags |= | |
506 | I40E_FLAG_FD_SB_ENABLED; | |
55a5e60b ASJ |
507 | } |
508 | } else { | |
e99bdd39 | 509 | dev_info(&pdev->dev, |
f7233c54 | 510 | "FD filter programming failed due to incorrect filter parameters\n"); |
55a5e60b ASJ |
511 | } |
512 | } else if (error == | |
513 | (0x1 << I40E_RX_PROG_STATUS_DESC_NO_FD_ENTRY_SHIFT)) { | |
13c2884f | 514 | if (I40E_DEBUG_FD & pf->hw.debug_mask) |
e99bdd39 | 515 | dev_info(&pdev->dev, "ntuple filter fd_id = %d, could not be removed\n", |
13c2884f | 516 | rx_desc->wb.qword0.hi_dword.fd_id); |
55a5e60b | 517 | } |
fd0a05ce JB |
518 | } |
519 | ||
520 | /** | |
a5e9c572 | 521 | * i40e_unmap_and_free_tx_resource - Release a Tx buffer |
fd0a05ce JB |
522 | * @ring: the ring that owns the buffer |
523 | * @tx_buffer: the buffer to free | |
524 | **/ | |
a5e9c572 AD |
525 | static void i40e_unmap_and_free_tx_resource(struct i40e_ring *ring, |
526 | struct i40e_tx_buffer *tx_buffer) | |
fd0a05ce | 527 | { |
a5e9c572 | 528 | if (tx_buffer->skb) { |
49d7d933 ASJ |
529 | if (tx_buffer->tx_flags & I40E_TX_FLAGS_FD_SB) |
530 | kfree(tx_buffer->raw_buf); | |
531 | else | |
532 | dev_kfree_skb_any(tx_buffer->skb); | |
533 | ||
a5e9c572 | 534 | if (dma_unmap_len(tx_buffer, len)) |
fd0a05ce | 535 | dma_unmap_single(ring->dev, |
35a1e2ad AD |
536 | dma_unmap_addr(tx_buffer, dma), |
537 | dma_unmap_len(tx_buffer, len), | |
fd0a05ce | 538 | DMA_TO_DEVICE); |
a5e9c572 AD |
539 | } else if (dma_unmap_len(tx_buffer, len)) { |
540 | dma_unmap_page(ring->dev, | |
541 | dma_unmap_addr(tx_buffer, dma), | |
542 | dma_unmap_len(tx_buffer, len), | |
543 | DMA_TO_DEVICE); | |
fd0a05ce | 544 | } |
a5e9c572 AD |
545 | tx_buffer->next_to_watch = NULL; |
546 | tx_buffer->skb = NULL; | |
35a1e2ad | 547 | dma_unmap_len_set(tx_buffer, len, 0); |
a5e9c572 | 548 | /* tx_buffer must be completely set up in the transmit path */ |
fd0a05ce JB |
549 | } |
550 | ||
551 | /** | |
552 | * i40e_clean_tx_ring - Free any empty Tx buffers | |
553 | * @tx_ring: ring to be cleaned | |
554 | **/ | |
555 | void i40e_clean_tx_ring(struct i40e_ring *tx_ring) | |
556 | { | |
fd0a05ce JB |
557 | unsigned long bi_size; |
558 | u16 i; | |
559 | ||
560 | /* ring already cleared, nothing to do */ | |
561 | if (!tx_ring->tx_bi) | |
562 | return; | |
563 | ||
564 | /* Free all the Tx ring sk_buffs */ | |
a5e9c572 AD |
565 | for (i = 0; i < tx_ring->count; i++) |
566 | i40e_unmap_and_free_tx_resource(tx_ring, &tx_ring->tx_bi[i]); | |
fd0a05ce JB |
567 | |
568 | bi_size = sizeof(struct i40e_tx_buffer) * tx_ring->count; | |
569 | memset(tx_ring->tx_bi, 0, bi_size); | |
570 | ||
571 | /* Zero out the descriptor ring */ | |
572 | memset(tx_ring->desc, 0, tx_ring->size); | |
573 | ||
574 | tx_ring->next_to_use = 0; | |
575 | tx_ring->next_to_clean = 0; | |
7070ce0a AD |
576 | |
577 | if (!tx_ring->netdev) | |
578 | return; | |
579 | ||
580 | /* cleanup Tx queue statistics */ | |
581 | netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring->netdev, | |
582 | tx_ring->queue_index)); | |
fd0a05ce JB |
583 | } |
584 | ||
585 | /** | |
586 | * i40e_free_tx_resources - Free Tx resources per queue | |
587 | * @tx_ring: Tx descriptor ring for a specific queue | |
588 | * | |
589 | * Free all transmit software resources | |
590 | **/ | |
591 | void i40e_free_tx_resources(struct i40e_ring *tx_ring) | |
592 | { | |
593 | i40e_clean_tx_ring(tx_ring); | |
594 | kfree(tx_ring->tx_bi); | |
595 | tx_ring->tx_bi = NULL; | |
596 | ||
597 | if (tx_ring->desc) { | |
598 | dma_free_coherent(tx_ring->dev, tx_ring->size, | |
599 | tx_ring->desc, tx_ring->dma); | |
600 | tx_ring->desc = NULL; | |
601 | } | |
602 | } | |
603 | ||
a68de58d JB |
604 | /** |
605 | * i40e_get_head - Retrieve head from head writeback | |
606 | * @tx_ring: tx ring to fetch head of | |
607 | * | |
608 | * Returns value of Tx ring head based on value stored | |
609 | * in head write-back location | |
610 | **/ | |
611 | static inline u32 i40e_get_head(struct i40e_ring *tx_ring) | |
612 | { | |
613 | void *head = (struct i40e_tx_desc *)tx_ring->desc + tx_ring->count; | |
614 | ||
615 | return le32_to_cpu(*(volatile __le32 *)head); | |
616 | } | |
617 | ||
fd0a05ce JB |
618 | /** |
619 | * i40e_get_tx_pending - how many tx descriptors not processed | |
620 | * @tx_ring: the ring of descriptors | |
621 | * | |
622 | * Since there is no access to the ring head register | |
623 | * in XL710, we need to use our local copies | |
624 | **/ | |
625 | static u32 i40e_get_tx_pending(struct i40e_ring *ring) | |
626 | { | |
a68de58d JB |
627 | u32 head, tail; |
628 | ||
629 | head = i40e_get_head(ring); | |
630 | tail = readl(ring->tail); | |
631 | ||
632 | if (head != tail) | |
633 | return (head < tail) ? | |
634 | tail - head : (tail + ring->count - head); | |
635 | ||
636 | return 0; | |
fd0a05ce JB |
637 | } |
638 | ||
639 | /** | |
640 | * i40e_check_tx_hang - Is there a hang in the Tx queue | |
641 | * @tx_ring: the ring of descriptors | |
642 | **/ | |
643 | static bool i40e_check_tx_hang(struct i40e_ring *tx_ring) | |
644 | { | |
a68de58d JB |
645 | u32 tx_done = tx_ring->stats.packets; |
646 | u32 tx_done_old = tx_ring->tx_stats.tx_done_old; | |
fd0a05ce | 647 | u32 tx_pending = i40e_get_tx_pending(tx_ring); |
810b3ae4 | 648 | struct i40e_pf *pf = tx_ring->vsi->back; |
fd0a05ce JB |
649 | bool ret = false; |
650 | ||
651 | clear_check_for_tx_hang(tx_ring); | |
652 | ||
653 | /* Check for a hung queue, but be thorough. This verifies | |
654 | * that a transmit has been completed since the previous | |
655 | * check AND there is at least one packet pending. The | |
656 | * ARMED bit is set to indicate a potential hang. The | |
657 | * bit is cleared if a pause frame is received to remove | |
658 | * false hang detection due to PFC or 802.3x frames. By | |
659 | * requiring this to fail twice we avoid races with | |
660 | * PFC clearing the ARMED bit and conditions where we | |
661 | * run the check_tx_hang logic with a transmit completion | |
662 | * pending but without time to complete it yet. | |
663 | */ | |
a68de58d | 664 | if ((tx_done_old == tx_done) && tx_pending) { |
fd0a05ce JB |
665 | /* make sure it is true for two checks in a row */ |
666 | ret = test_and_set_bit(__I40E_HANG_CHECK_ARMED, | |
667 | &tx_ring->state); | |
a68de58d JB |
668 | } else if (tx_done_old == tx_done && |
669 | (tx_pending < I40E_MIN_DESC_PENDING) && (tx_pending > 0)) { | |
810b3ae4 ASJ |
670 | if (I40E_DEBUG_FLOW & pf->hw.debug_mask) |
671 | dev_info(tx_ring->dev, "HW needs some more descs to do a cacheline flush. tx_pending %d, queue %d", | |
672 | tx_pending, tx_ring->queue_index); | |
673 | pf->tx_sluggish_count++; | |
fd0a05ce JB |
674 | } else { |
675 | /* update completed stats and disarm the hang check */ | |
a68de58d | 676 | tx_ring->tx_stats.tx_done_old = tx_done; |
fd0a05ce JB |
677 | clear_bit(__I40E_HANG_CHECK_ARMED, &tx_ring->state); |
678 | } | |
679 | ||
680 | return ret; | |
681 | } | |
682 | ||
d91649f5 JB |
683 | #define WB_STRIDE 0x3 |
684 | ||
fd0a05ce JB |
685 | /** |
686 | * i40e_clean_tx_irq - Reclaim resources after transmit completes | |
687 | * @tx_ring: tx ring to clean | |
688 | * @budget: how many cleans we're allowed | |
689 | * | |
690 | * Returns true if there's any budget left (e.g. the clean is finished) | |
691 | **/ | |
692 | static bool i40e_clean_tx_irq(struct i40e_ring *tx_ring, int budget) | |
693 | { | |
694 | u16 i = tx_ring->next_to_clean; | |
695 | struct i40e_tx_buffer *tx_buf; | |
1943d8ba | 696 | struct i40e_tx_desc *tx_head; |
fd0a05ce JB |
697 | struct i40e_tx_desc *tx_desc; |
698 | unsigned int total_packets = 0; | |
699 | unsigned int total_bytes = 0; | |
700 | ||
701 | tx_buf = &tx_ring->tx_bi[i]; | |
702 | tx_desc = I40E_TX_DESC(tx_ring, i); | |
a5e9c572 | 703 | i -= tx_ring->count; |
fd0a05ce | 704 | |
1943d8ba JB |
705 | tx_head = I40E_TX_DESC(tx_ring, i40e_get_head(tx_ring)); |
706 | ||
a5e9c572 AD |
707 | do { |
708 | struct i40e_tx_desc *eop_desc = tx_buf->next_to_watch; | |
fd0a05ce JB |
709 | |
710 | /* if next_to_watch is not set then there is no work pending */ | |
711 | if (!eop_desc) | |
712 | break; | |
713 | ||
a5e9c572 AD |
714 | /* prevent any other reads prior to eop_desc */ |
715 | read_barrier_depends(); | |
716 | ||
1943d8ba JB |
717 | /* we have caught up to head, no work left to do */ |
718 | if (tx_head == tx_desc) | |
fd0a05ce JB |
719 | break; |
720 | ||
c304fdac | 721 | /* clear next_to_watch to prevent false hangs */ |
fd0a05ce | 722 | tx_buf->next_to_watch = NULL; |
fd0a05ce | 723 | |
a5e9c572 AD |
724 | /* update the statistics for this packet */ |
725 | total_bytes += tx_buf->bytecount; | |
726 | total_packets += tx_buf->gso_segs; | |
fd0a05ce | 727 | |
a5e9c572 | 728 | /* free the skb */ |
a81fb049 | 729 | dev_consume_skb_any(tx_buf->skb); |
fd0a05ce | 730 | |
a5e9c572 AD |
731 | /* unmap skb header data */ |
732 | dma_unmap_single(tx_ring->dev, | |
733 | dma_unmap_addr(tx_buf, dma), | |
734 | dma_unmap_len(tx_buf, len), | |
735 | DMA_TO_DEVICE); | |
fd0a05ce | 736 | |
a5e9c572 AD |
737 | /* clear tx_buffer data */ |
738 | tx_buf->skb = NULL; | |
739 | dma_unmap_len_set(tx_buf, len, 0); | |
fd0a05ce | 740 | |
a5e9c572 AD |
741 | /* unmap remaining buffers */ |
742 | while (tx_desc != eop_desc) { | |
fd0a05ce JB |
743 | |
744 | tx_buf++; | |
745 | tx_desc++; | |
746 | i++; | |
a5e9c572 AD |
747 | if (unlikely(!i)) { |
748 | i -= tx_ring->count; | |
fd0a05ce JB |
749 | tx_buf = tx_ring->tx_bi; |
750 | tx_desc = I40E_TX_DESC(tx_ring, 0); | |
751 | } | |
fd0a05ce | 752 | |
a5e9c572 AD |
753 | /* unmap any remaining paged data */ |
754 | if (dma_unmap_len(tx_buf, len)) { | |
755 | dma_unmap_page(tx_ring->dev, | |
756 | dma_unmap_addr(tx_buf, dma), | |
757 | dma_unmap_len(tx_buf, len), | |
758 | DMA_TO_DEVICE); | |
759 | dma_unmap_len_set(tx_buf, len, 0); | |
760 | } | |
761 | } | |
762 | ||
763 | /* move us one more past the eop_desc for start of next pkt */ | |
764 | tx_buf++; | |
765 | tx_desc++; | |
766 | i++; | |
767 | if (unlikely(!i)) { | |
768 | i -= tx_ring->count; | |
769 | tx_buf = tx_ring->tx_bi; | |
770 | tx_desc = I40E_TX_DESC(tx_ring, 0); | |
771 | } | |
772 | ||
016890b9 JB |
773 | prefetch(tx_desc); |
774 | ||
a5e9c572 AD |
775 | /* update budget accounting */ |
776 | budget--; | |
777 | } while (likely(budget)); | |
778 | ||
779 | i += tx_ring->count; | |
fd0a05ce | 780 | tx_ring->next_to_clean = i; |
980e9b11 | 781 | u64_stats_update_begin(&tx_ring->syncp); |
a114d0a6 AD |
782 | tx_ring->stats.bytes += total_bytes; |
783 | tx_ring->stats.packets += total_packets; | |
980e9b11 | 784 | u64_stats_update_end(&tx_ring->syncp); |
fd0a05ce JB |
785 | tx_ring->q_vector->tx.total_bytes += total_bytes; |
786 | tx_ring->q_vector->tx.total_packets += total_packets; | |
a5e9c572 | 787 | |
d91649f5 JB |
788 | /* check to see if there are any non-cache aligned descriptors |
789 | * waiting to be written back, and kick the hardware to force | |
790 | * them to be written back in case of napi polling | |
791 | */ | |
792 | if (budget && | |
793 | !((i & WB_STRIDE) == WB_STRIDE) && | |
794 | !test_bit(__I40E_DOWN, &tx_ring->vsi->state) && | |
795 | (I40E_DESC_UNUSED(tx_ring) != tx_ring->count)) | |
796 | tx_ring->arm_wb = true; | |
797 | else | |
798 | tx_ring->arm_wb = false; | |
799 | ||
fd0a05ce JB |
800 | if (check_for_tx_hang(tx_ring) && i40e_check_tx_hang(tx_ring)) { |
801 | /* schedule immediate reset if we believe we hung */ | |
802 | dev_info(tx_ring->dev, "Detected Tx Unit Hang\n" | |
803 | " VSI <%d>\n" | |
804 | " Tx Queue <%d>\n" | |
805 | " next_to_use <%x>\n" | |
806 | " next_to_clean <%x>\n", | |
807 | tx_ring->vsi->seid, | |
808 | tx_ring->queue_index, | |
809 | tx_ring->next_to_use, i); | |
810 | dev_info(tx_ring->dev, "tx_bi[next_to_clean]\n" | |
811 | " time_stamp <%lx>\n" | |
812 | " jiffies <%lx>\n", | |
813 | tx_ring->tx_bi[i].time_stamp, jiffies); | |
814 | ||
815 | netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); | |
816 | ||
817 | dev_info(tx_ring->dev, | |
d91649f5 | 818 | "tx hang detected on queue %d, reset requested\n", |
fd0a05ce JB |
819 | tx_ring->queue_index); |
820 | ||
d91649f5 JB |
821 | /* do not fire the reset immediately, wait for the stack to |
822 | * decide we are truly stuck, also prevents every queue from | |
823 | * simultaneously requesting a reset | |
824 | */ | |
fd0a05ce | 825 | |
d91649f5 JB |
826 | /* the adapter is about to reset, no point in enabling polling */ |
827 | budget = 1; | |
fd0a05ce JB |
828 | } |
829 | ||
7070ce0a AD |
830 | netdev_tx_completed_queue(netdev_get_tx_queue(tx_ring->netdev, |
831 | tx_ring->queue_index), | |
832 | total_packets, total_bytes); | |
833 | ||
fd0a05ce JB |
834 | #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2) |
835 | if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) && | |
836 | (I40E_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) { | |
837 | /* Make sure that anybody stopping the queue after this | |
838 | * sees the new next_to_clean. | |
839 | */ | |
840 | smp_mb(); | |
841 | if (__netif_subqueue_stopped(tx_ring->netdev, | |
842 | tx_ring->queue_index) && | |
843 | !test_bit(__I40E_DOWN, &tx_ring->vsi->state)) { | |
844 | netif_wake_subqueue(tx_ring->netdev, | |
845 | tx_ring->queue_index); | |
846 | ++tx_ring->tx_stats.restart_queue; | |
847 | } | |
848 | } | |
849 | ||
d91649f5 JB |
850 | return !!budget; |
851 | } | |
852 | ||
853 | /** | |
854 | * i40e_force_wb - Arm hardware to do a wb on noncache aligned descriptors | |
855 | * @vsi: the VSI we care about | |
856 | * @q_vector: the vector on which to force writeback | |
857 | * | |
858 | **/ | |
859 | static void i40e_force_wb(struct i40e_vsi *vsi, struct i40e_q_vector *q_vector) | |
860 | { | |
861 | u32 val = I40E_PFINT_DYN_CTLN_INTENA_MASK | | |
97bf75f1 | 862 | I40E_PFINT_DYN_CTLN_ITR_INDX_MASK | /* set noitr */ |
d91649f5 | 863 | I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK | |
c29af37f ASJ |
864 | I40E_PFINT_DYN_CTLN_SW_ITR_INDX_ENA_MASK; |
865 | /* allow 00 to be written to the index */ | |
d91649f5 JB |
866 | |
867 | wr32(&vsi->back->hw, | |
868 | I40E_PFINT_DYN_CTLN(q_vector->v_idx + vsi->base_vector - 1), | |
869 | val); | |
fd0a05ce JB |
870 | } |
871 | ||
872 | /** | |
873 | * i40e_set_new_dynamic_itr - Find new ITR level | |
874 | * @rc: structure containing ring performance data | |
875 | * | |
876 | * Stores a new ITR value based on packets and byte counts during | |
877 | * the last interrupt. The advantage of per interrupt computation | |
878 | * is faster updates and more accurate ITR for the current traffic | |
879 | * pattern. Constants in this function were computed based on | |
880 | * theoretical maximum wire speed and thresholds were set based on | |
881 | * testing data as well as attempting to minimize response time | |
882 | * while increasing bulk throughput. | |
883 | **/ | |
884 | static void i40e_set_new_dynamic_itr(struct i40e_ring_container *rc) | |
885 | { | |
886 | enum i40e_latency_range new_latency_range = rc->latency_range; | |
887 | u32 new_itr = rc->itr; | |
888 | int bytes_per_int; | |
889 | ||
890 | if (rc->total_packets == 0 || !rc->itr) | |
891 | return; | |
892 | ||
893 | /* simple throttlerate management | |
894 | * 0-10MB/s lowest (100000 ints/s) | |
895 | * 10-20MB/s low (20000 ints/s) | |
896 | * 20-1249MB/s bulk (8000 ints/s) | |
897 | */ | |
898 | bytes_per_int = rc->total_bytes / rc->itr; | |
899 | switch (rc->itr) { | |
900 | case I40E_LOWEST_LATENCY: | |
901 | if (bytes_per_int > 10) | |
902 | new_latency_range = I40E_LOW_LATENCY; | |
903 | break; | |
904 | case I40E_LOW_LATENCY: | |
905 | if (bytes_per_int > 20) | |
906 | new_latency_range = I40E_BULK_LATENCY; | |
907 | else if (bytes_per_int <= 10) | |
908 | new_latency_range = I40E_LOWEST_LATENCY; | |
909 | break; | |
910 | case I40E_BULK_LATENCY: | |
911 | if (bytes_per_int <= 20) | |
912 | rc->latency_range = I40E_LOW_LATENCY; | |
913 | break; | |
914 | } | |
915 | ||
916 | switch (new_latency_range) { | |
917 | case I40E_LOWEST_LATENCY: | |
918 | new_itr = I40E_ITR_100K; | |
919 | break; | |
920 | case I40E_LOW_LATENCY: | |
921 | new_itr = I40E_ITR_20K; | |
922 | break; | |
923 | case I40E_BULK_LATENCY: | |
924 | new_itr = I40E_ITR_8K; | |
925 | break; | |
926 | default: | |
927 | break; | |
928 | } | |
929 | ||
930 | if (new_itr != rc->itr) { | |
931 | /* do an exponential smoothing */ | |
932 | new_itr = (10 * new_itr * rc->itr) / | |
933 | ((9 * new_itr) + rc->itr); | |
934 | rc->itr = new_itr & I40E_MAX_ITR; | |
935 | } | |
936 | ||
937 | rc->total_bytes = 0; | |
938 | rc->total_packets = 0; | |
939 | } | |
940 | ||
941 | /** | |
942 | * i40e_update_dynamic_itr - Adjust ITR based on bytes per int | |
943 | * @q_vector: the vector to adjust | |
944 | **/ | |
945 | static void i40e_update_dynamic_itr(struct i40e_q_vector *q_vector) | |
946 | { | |
947 | u16 vector = q_vector->vsi->base_vector + q_vector->v_idx; | |
948 | struct i40e_hw *hw = &q_vector->vsi->back->hw; | |
949 | u32 reg_addr; | |
950 | u16 old_itr; | |
951 | ||
952 | reg_addr = I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1); | |
953 | old_itr = q_vector->rx.itr; | |
954 | i40e_set_new_dynamic_itr(&q_vector->rx); | |
955 | if (old_itr != q_vector->rx.itr) | |
956 | wr32(hw, reg_addr, q_vector->rx.itr); | |
957 | ||
958 | reg_addr = I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1); | |
959 | old_itr = q_vector->tx.itr; | |
960 | i40e_set_new_dynamic_itr(&q_vector->tx); | |
961 | if (old_itr != q_vector->tx.itr) | |
962 | wr32(hw, reg_addr, q_vector->tx.itr); | |
fd0a05ce JB |
963 | } |
964 | ||
965 | /** | |
966 | * i40e_clean_programming_status - clean the programming status descriptor | |
967 | * @rx_ring: the rx ring that has this descriptor | |
968 | * @rx_desc: the rx descriptor written back by HW | |
969 | * | |
970 | * Flow director should handle FD_FILTER_STATUS to check its filter programming | |
971 | * status being successful or not and take actions accordingly. FCoE should | |
972 | * handle its context/filter programming/invalidation status and take actions. | |
973 | * | |
974 | **/ | |
975 | static void i40e_clean_programming_status(struct i40e_ring *rx_ring, | |
976 | union i40e_rx_desc *rx_desc) | |
977 | { | |
978 | u64 qw; | |
979 | u8 id; | |
980 | ||
981 | qw = le64_to_cpu(rx_desc->wb.qword1.status_error_len); | |
982 | id = (qw & I40E_RX_PROG_STATUS_DESC_QW1_PROGID_MASK) >> | |
983 | I40E_RX_PROG_STATUS_DESC_QW1_PROGID_SHIFT; | |
984 | ||
985 | if (id == I40E_RX_PROG_STATUS_DESC_FD_FILTER_STATUS) | |
55a5e60b | 986 | i40e_fd_handle_status(rx_ring, rx_desc, id); |
38e00438 VD |
987 | #ifdef I40E_FCOE |
988 | else if ((id == I40E_RX_PROG_STATUS_DESC_FCOE_CTXT_PROG_STATUS) || | |
989 | (id == I40E_RX_PROG_STATUS_DESC_FCOE_CTXT_INVL_STATUS)) | |
990 | i40e_fcoe_handle_status(rx_ring, rx_desc, id); | |
991 | #endif | |
fd0a05ce JB |
992 | } |
993 | ||
994 | /** | |
995 | * i40e_setup_tx_descriptors - Allocate the Tx descriptors | |
996 | * @tx_ring: the tx ring to set up | |
997 | * | |
998 | * Return 0 on success, negative on error | |
999 | **/ | |
1000 | int i40e_setup_tx_descriptors(struct i40e_ring *tx_ring) | |
1001 | { | |
1002 | struct device *dev = tx_ring->dev; | |
1003 | int bi_size; | |
1004 | ||
1005 | if (!dev) | |
1006 | return -ENOMEM; | |
1007 | ||
1008 | bi_size = sizeof(struct i40e_tx_buffer) * tx_ring->count; | |
1009 | tx_ring->tx_bi = kzalloc(bi_size, GFP_KERNEL); | |
1010 | if (!tx_ring->tx_bi) | |
1011 | goto err; | |
1012 | ||
1013 | /* round up to nearest 4K */ | |
1014 | tx_ring->size = tx_ring->count * sizeof(struct i40e_tx_desc); | |
1943d8ba JB |
1015 | /* add u32 for head writeback, align after this takes care of |
1016 | * guaranteeing this is at least one cache line in size | |
1017 | */ | |
1018 | tx_ring->size += sizeof(u32); | |
fd0a05ce JB |
1019 | tx_ring->size = ALIGN(tx_ring->size, 4096); |
1020 | tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size, | |
1021 | &tx_ring->dma, GFP_KERNEL); | |
1022 | if (!tx_ring->desc) { | |
1023 | dev_info(dev, "Unable to allocate memory for the Tx descriptor ring, size=%d\n", | |
1024 | tx_ring->size); | |
1025 | goto err; | |
1026 | } | |
1027 | ||
1028 | tx_ring->next_to_use = 0; | |
1029 | tx_ring->next_to_clean = 0; | |
1030 | return 0; | |
1031 | ||
1032 | err: | |
1033 | kfree(tx_ring->tx_bi); | |
1034 | tx_ring->tx_bi = NULL; | |
1035 | return -ENOMEM; | |
1036 | } | |
1037 | ||
1038 | /** | |
1039 | * i40e_clean_rx_ring - Free Rx buffers | |
1040 | * @rx_ring: ring to be cleaned | |
1041 | **/ | |
1042 | void i40e_clean_rx_ring(struct i40e_ring *rx_ring) | |
1043 | { | |
1044 | struct device *dev = rx_ring->dev; | |
1045 | struct i40e_rx_buffer *rx_bi; | |
1046 | unsigned long bi_size; | |
1047 | u16 i; | |
1048 | ||
1049 | /* ring already cleared, nothing to do */ | |
1050 | if (!rx_ring->rx_bi) | |
1051 | return; | |
1052 | ||
a132af24 MW |
1053 | if (ring_is_ps_enabled(rx_ring)) { |
1054 | int bufsz = ALIGN(rx_ring->rx_hdr_len, 256) * rx_ring->count; | |
1055 | ||
1056 | rx_bi = &rx_ring->rx_bi[0]; | |
1057 | if (rx_bi->hdr_buf) { | |
1058 | dma_free_coherent(dev, | |
1059 | bufsz, | |
1060 | rx_bi->hdr_buf, | |
1061 | rx_bi->dma); | |
1062 | for (i = 0; i < rx_ring->count; i++) { | |
1063 | rx_bi = &rx_ring->rx_bi[i]; | |
1064 | rx_bi->dma = 0; | |
37a2973a | 1065 | rx_bi->hdr_buf = NULL; |
a132af24 MW |
1066 | } |
1067 | } | |
1068 | } | |
fd0a05ce JB |
1069 | /* Free all the Rx ring sk_buffs */ |
1070 | for (i = 0; i < rx_ring->count; i++) { | |
1071 | rx_bi = &rx_ring->rx_bi[i]; | |
1072 | if (rx_bi->dma) { | |
1073 | dma_unmap_single(dev, | |
1074 | rx_bi->dma, | |
1075 | rx_ring->rx_buf_len, | |
1076 | DMA_FROM_DEVICE); | |
1077 | rx_bi->dma = 0; | |
1078 | } | |
1079 | if (rx_bi->skb) { | |
1080 | dev_kfree_skb(rx_bi->skb); | |
1081 | rx_bi->skb = NULL; | |
1082 | } | |
1083 | if (rx_bi->page) { | |
1084 | if (rx_bi->page_dma) { | |
1085 | dma_unmap_page(dev, | |
1086 | rx_bi->page_dma, | |
1087 | PAGE_SIZE / 2, | |
1088 | DMA_FROM_DEVICE); | |
1089 | rx_bi->page_dma = 0; | |
1090 | } | |
1091 | __free_page(rx_bi->page); | |
1092 | rx_bi->page = NULL; | |
1093 | rx_bi->page_offset = 0; | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | bi_size = sizeof(struct i40e_rx_buffer) * rx_ring->count; | |
1098 | memset(rx_ring->rx_bi, 0, bi_size); | |
1099 | ||
1100 | /* Zero out the descriptor ring */ | |
1101 | memset(rx_ring->desc, 0, rx_ring->size); | |
1102 | ||
1103 | rx_ring->next_to_clean = 0; | |
1104 | rx_ring->next_to_use = 0; | |
1105 | } | |
1106 | ||
1107 | /** | |
1108 | * i40e_free_rx_resources - Free Rx resources | |
1109 | * @rx_ring: ring to clean the resources from | |
1110 | * | |
1111 | * Free all receive software resources | |
1112 | **/ | |
1113 | void i40e_free_rx_resources(struct i40e_ring *rx_ring) | |
1114 | { | |
1115 | i40e_clean_rx_ring(rx_ring); | |
1116 | kfree(rx_ring->rx_bi); | |
1117 | rx_ring->rx_bi = NULL; | |
1118 | ||
1119 | if (rx_ring->desc) { | |
1120 | dma_free_coherent(rx_ring->dev, rx_ring->size, | |
1121 | rx_ring->desc, rx_ring->dma); | |
1122 | rx_ring->desc = NULL; | |
1123 | } | |
1124 | } | |
1125 | ||
a132af24 MW |
1126 | /** |
1127 | * i40e_alloc_rx_headers - allocate rx header buffers | |
1128 | * @rx_ring: ring to alloc buffers | |
1129 | * | |
1130 | * Allocate rx header buffers for the entire ring. As these are static, | |
1131 | * this is only called when setting up a new ring. | |
1132 | **/ | |
1133 | void i40e_alloc_rx_headers(struct i40e_ring *rx_ring) | |
1134 | { | |
1135 | struct device *dev = rx_ring->dev; | |
1136 | struct i40e_rx_buffer *rx_bi; | |
1137 | dma_addr_t dma; | |
1138 | void *buffer; | |
1139 | int buf_size; | |
1140 | int i; | |
1141 | ||
1142 | if (rx_ring->rx_bi[0].hdr_buf) | |
1143 | return; | |
1144 | /* Make sure the buffers don't cross cache line boundaries. */ | |
1145 | buf_size = ALIGN(rx_ring->rx_hdr_len, 256); | |
1146 | buffer = dma_alloc_coherent(dev, buf_size * rx_ring->count, | |
1147 | &dma, GFP_KERNEL); | |
1148 | if (!buffer) | |
1149 | return; | |
1150 | for (i = 0; i < rx_ring->count; i++) { | |
1151 | rx_bi = &rx_ring->rx_bi[i]; | |
1152 | rx_bi->dma = dma + (i * buf_size); | |
1153 | rx_bi->hdr_buf = buffer + (i * buf_size); | |
1154 | } | |
1155 | } | |
1156 | ||
fd0a05ce JB |
1157 | /** |
1158 | * i40e_setup_rx_descriptors - Allocate Rx descriptors | |
1159 | * @rx_ring: Rx descriptor ring (for a specific queue) to setup | |
1160 | * | |
1161 | * Returns 0 on success, negative on failure | |
1162 | **/ | |
1163 | int i40e_setup_rx_descriptors(struct i40e_ring *rx_ring) | |
1164 | { | |
1165 | struct device *dev = rx_ring->dev; | |
1166 | int bi_size; | |
1167 | ||
1168 | bi_size = sizeof(struct i40e_rx_buffer) * rx_ring->count; | |
1169 | rx_ring->rx_bi = kzalloc(bi_size, GFP_KERNEL); | |
1170 | if (!rx_ring->rx_bi) | |
1171 | goto err; | |
1172 | ||
f217d6ca | 1173 | u64_stats_init(&rx_ring->syncp); |
638702bd | 1174 | |
fd0a05ce JB |
1175 | /* Round up to nearest 4K */ |
1176 | rx_ring->size = ring_is_16byte_desc_enabled(rx_ring) | |
1177 | ? rx_ring->count * sizeof(union i40e_16byte_rx_desc) | |
1178 | : rx_ring->count * sizeof(union i40e_32byte_rx_desc); | |
1179 | rx_ring->size = ALIGN(rx_ring->size, 4096); | |
1180 | rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size, | |
1181 | &rx_ring->dma, GFP_KERNEL); | |
1182 | ||
1183 | if (!rx_ring->desc) { | |
1184 | dev_info(dev, "Unable to allocate memory for the Rx descriptor ring, size=%d\n", | |
1185 | rx_ring->size); | |
1186 | goto err; | |
1187 | } | |
1188 | ||
1189 | rx_ring->next_to_clean = 0; | |
1190 | rx_ring->next_to_use = 0; | |
1191 | ||
1192 | return 0; | |
1193 | err: | |
1194 | kfree(rx_ring->rx_bi); | |
1195 | rx_ring->rx_bi = NULL; | |
1196 | return -ENOMEM; | |
1197 | } | |
1198 | ||
1199 | /** | |
1200 | * i40e_release_rx_desc - Store the new tail and head values | |
1201 | * @rx_ring: ring to bump | |
1202 | * @val: new head index | |
1203 | **/ | |
1204 | static inline void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val) | |
1205 | { | |
1206 | rx_ring->next_to_use = val; | |
1207 | /* Force memory writes to complete before letting h/w | |
1208 | * know there are new descriptors to fetch. (Only | |
1209 | * applicable for weak-ordered memory model archs, | |
1210 | * such as IA-64). | |
1211 | */ | |
1212 | wmb(); | |
1213 | writel(val, rx_ring->tail); | |
1214 | } | |
1215 | ||
1216 | /** | |
a132af24 | 1217 | * i40e_alloc_rx_buffers_ps - Replace used receive buffers; packet split |
fd0a05ce JB |
1218 | * @rx_ring: ring to place buffers on |
1219 | * @cleaned_count: number of buffers to replace | |
1220 | **/ | |
a132af24 MW |
1221 | void i40e_alloc_rx_buffers_ps(struct i40e_ring *rx_ring, u16 cleaned_count) |
1222 | { | |
1223 | u16 i = rx_ring->next_to_use; | |
1224 | union i40e_rx_desc *rx_desc; | |
1225 | struct i40e_rx_buffer *bi; | |
1226 | ||
1227 | /* do nothing if no valid netdev defined */ | |
1228 | if (!rx_ring->netdev || !cleaned_count) | |
1229 | return; | |
1230 | ||
1231 | while (cleaned_count--) { | |
1232 | rx_desc = I40E_RX_DESC(rx_ring, i); | |
1233 | bi = &rx_ring->rx_bi[i]; | |
1234 | ||
1235 | if (bi->skb) /* desc is in use */ | |
1236 | goto no_buffers; | |
1237 | if (!bi->page) { | |
1238 | bi->page = alloc_page(GFP_ATOMIC); | |
1239 | if (!bi->page) { | |
1240 | rx_ring->rx_stats.alloc_page_failed++; | |
1241 | goto no_buffers; | |
1242 | } | |
1243 | } | |
1244 | ||
1245 | if (!bi->page_dma) { | |
1246 | /* use a half page if we're re-using */ | |
1247 | bi->page_offset ^= PAGE_SIZE / 2; | |
1248 | bi->page_dma = dma_map_page(rx_ring->dev, | |
1249 | bi->page, | |
1250 | bi->page_offset, | |
1251 | PAGE_SIZE / 2, | |
1252 | DMA_FROM_DEVICE); | |
1253 | if (dma_mapping_error(rx_ring->dev, | |
1254 | bi->page_dma)) { | |
1255 | rx_ring->rx_stats.alloc_page_failed++; | |
1256 | bi->page_dma = 0; | |
1257 | goto no_buffers; | |
1258 | } | |
1259 | } | |
1260 | ||
1261 | dma_sync_single_range_for_device(rx_ring->dev, | |
1262 | bi->dma, | |
1263 | 0, | |
1264 | rx_ring->rx_hdr_len, | |
1265 | DMA_FROM_DEVICE); | |
1266 | /* Refresh the desc even if buffer_addrs didn't change | |
1267 | * because each write-back erases this info. | |
1268 | */ | |
1269 | rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma); | |
1270 | rx_desc->read.hdr_addr = cpu_to_le64(bi->dma); | |
1271 | i++; | |
1272 | if (i == rx_ring->count) | |
1273 | i = 0; | |
1274 | } | |
1275 | ||
1276 | no_buffers: | |
1277 | if (rx_ring->next_to_use != i) | |
1278 | i40e_release_rx_desc(rx_ring, i); | |
1279 | } | |
1280 | ||
1281 | /** | |
1282 | * i40e_alloc_rx_buffers_1buf - Replace used receive buffers; single buffer | |
1283 | * @rx_ring: ring to place buffers on | |
1284 | * @cleaned_count: number of buffers to replace | |
1285 | **/ | |
1286 | void i40e_alloc_rx_buffers_1buf(struct i40e_ring *rx_ring, u16 cleaned_count) | |
fd0a05ce JB |
1287 | { |
1288 | u16 i = rx_ring->next_to_use; | |
1289 | union i40e_rx_desc *rx_desc; | |
1290 | struct i40e_rx_buffer *bi; | |
1291 | struct sk_buff *skb; | |
1292 | ||
1293 | /* do nothing if no valid netdev defined */ | |
1294 | if (!rx_ring->netdev || !cleaned_count) | |
1295 | return; | |
1296 | ||
1297 | while (cleaned_count--) { | |
1298 | rx_desc = I40E_RX_DESC(rx_ring, i); | |
1299 | bi = &rx_ring->rx_bi[i]; | |
1300 | skb = bi->skb; | |
1301 | ||
1302 | if (!skb) { | |
1303 | skb = netdev_alloc_skb_ip_align(rx_ring->netdev, | |
1304 | rx_ring->rx_buf_len); | |
1305 | if (!skb) { | |
420136cc | 1306 | rx_ring->rx_stats.alloc_buff_failed++; |
fd0a05ce JB |
1307 | goto no_buffers; |
1308 | } | |
1309 | /* initialize queue mapping */ | |
1310 | skb_record_rx_queue(skb, rx_ring->queue_index); | |
1311 | bi->skb = skb; | |
1312 | } | |
1313 | ||
1314 | if (!bi->dma) { | |
1315 | bi->dma = dma_map_single(rx_ring->dev, | |
1316 | skb->data, | |
1317 | rx_ring->rx_buf_len, | |
1318 | DMA_FROM_DEVICE); | |
1319 | if (dma_mapping_error(rx_ring->dev, bi->dma)) { | |
420136cc | 1320 | rx_ring->rx_stats.alloc_buff_failed++; |
fd0a05ce JB |
1321 | bi->dma = 0; |
1322 | goto no_buffers; | |
1323 | } | |
1324 | } | |
1325 | ||
a132af24 MW |
1326 | rx_desc->read.pkt_addr = cpu_to_le64(bi->dma); |
1327 | rx_desc->read.hdr_addr = 0; | |
fd0a05ce JB |
1328 | i++; |
1329 | if (i == rx_ring->count) | |
1330 | i = 0; | |
1331 | } | |
1332 | ||
1333 | no_buffers: | |
1334 | if (rx_ring->next_to_use != i) | |
1335 | i40e_release_rx_desc(rx_ring, i); | |
1336 | } | |
1337 | ||
1338 | /** | |
1339 | * i40e_receive_skb - Send a completed packet up the stack | |
1340 | * @rx_ring: rx ring in play | |
1341 | * @skb: packet to send up | |
1342 | * @vlan_tag: vlan tag for packet | |
1343 | **/ | |
1344 | static void i40e_receive_skb(struct i40e_ring *rx_ring, | |
1345 | struct sk_buff *skb, u16 vlan_tag) | |
1346 | { | |
1347 | struct i40e_q_vector *q_vector = rx_ring->q_vector; | |
1348 | struct i40e_vsi *vsi = rx_ring->vsi; | |
1349 | u64 flags = vsi->back->flags; | |
1350 | ||
1351 | if (vlan_tag & VLAN_VID_MASK) | |
1352 | __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vlan_tag); | |
1353 | ||
1354 | if (flags & I40E_FLAG_IN_NETPOLL) | |
1355 | netif_rx(skb); | |
1356 | else | |
1357 | napi_gro_receive(&q_vector->napi, skb); | |
1358 | } | |
1359 | ||
1360 | /** | |
1361 | * i40e_rx_checksum - Indicate in skb if hw indicated a good cksum | |
1362 | * @vsi: the VSI we care about | |
1363 | * @skb: skb currently being received and modified | |
1364 | * @rx_status: status value of last descriptor in packet | |
1365 | * @rx_error: error value of last descriptor in packet | |
8144f0f7 | 1366 | * @rx_ptype: ptype value of last descriptor in packet |
fd0a05ce JB |
1367 | **/ |
1368 | static inline void i40e_rx_checksum(struct i40e_vsi *vsi, | |
1369 | struct sk_buff *skb, | |
1370 | u32 rx_status, | |
8144f0f7 JG |
1371 | u32 rx_error, |
1372 | u16 rx_ptype) | |
fd0a05ce | 1373 | { |
8a3c91cc JB |
1374 | struct i40e_rx_ptype_decoded decoded = decode_rx_desc_ptype(rx_ptype); |
1375 | bool ipv4 = false, ipv6 = false; | |
8144f0f7 JG |
1376 | bool ipv4_tunnel, ipv6_tunnel; |
1377 | __wsum rx_udp_csum; | |
8144f0f7 | 1378 | struct iphdr *iph; |
8a3c91cc | 1379 | __sum16 csum; |
8144f0f7 | 1380 | |
f8faaa40 ASJ |
1381 | ipv4_tunnel = (rx_ptype >= I40E_RX_PTYPE_GRENAT4_MAC_PAY3) && |
1382 | (rx_ptype <= I40E_RX_PTYPE_GRENAT4_MACVLAN_IPV6_ICMP_PAY4); | |
1383 | ipv6_tunnel = (rx_ptype >= I40E_RX_PTYPE_GRENAT6_MAC_PAY3) && | |
1384 | (rx_ptype <= I40E_RX_PTYPE_GRENAT6_MACVLAN_IPV6_ICMP_PAY4); | |
8144f0f7 | 1385 | |
fd0a05ce JB |
1386 | skb->ip_summed = CHECKSUM_NONE; |
1387 | ||
1388 | /* Rx csum enabled and ip headers found? */ | |
8a3c91cc JB |
1389 | if (!(vsi->netdev->features & NETIF_F_RXCSUM)) |
1390 | return; | |
1391 | ||
1392 | /* did the hardware decode the packet and checksum? */ | |
1393 | if (!(rx_status & (1 << I40E_RX_DESC_STATUS_L3L4P_SHIFT))) | |
1394 | return; | |
1395 | ||
1396 | /* both known and outer_ip must be set for the below code to work */ | |
1397 | if (!(decoded.known && decoded.outer_ip)) | |
fd0a05ce JB |
1398 | return; |
1399 | ||
8a3c91cc JB |
1400 | if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP && |
1401 | decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV4) | |
1402 | ipv4 = true; | |
1403 | else if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP && | |
1404 | decoded.outer_ip_ver == I40E_RX_PTYPE_OUTER_IPV6) | |
1405 | ipv6 = true; | |
1406 | ||
1407 | if (ipv4 && | |
1408 | (rx_error & ((1 << I40E_RX_DESC_ERROR_IPE_SHIFT) | | |
1409 | (1 << I40E_RX_DESC_ERROR_EIPE_SHIFT)))) | |
1410 | goto checksum_fail; | |
1411 | ||
ddf1d0d7 | 1412 | /* likely incorrect csum if alternate IP extension headers found */ |
8a3c91cc | 1413 | if (ipv6 && |
8a3c91cc JB |
1414 | rx_status & (1 << I40E_RX_DESC_STATUS_IPV6EXADD_SHIFT)) |
1415 | /* don't increment checksum err here, non-fatal err */ | |
8ee75a8e SN |
1416 | return; |
1417 | ||
8a3c91cc JB |
1418 | /* there was some L4 error, count error and punt packet to the stack */ |
1419 | if (rx_error & (1 << I40E_RX_DESC_ERROR_L4E_SHIFT)) | |
1420 | goto checksum_fail; | |
1421 | ||
1422 | /* handle packets that were not able to be checksummed due | |
1423 | * to arrival speed, in this case the stack can compute | |
1424 | * the csum. | |
1425 | */ | |
1426 | if (rx_error & (1 << I40E_RX_DESC_ERROR_PPRS_SHIFT)) | |
fd0a05ce | 1427 | return; |
fd0a05ce | 1428 | |
8a3c91cc JB |
1429 | /* If VXLAN traffic has an outer UDPv4 checksum we need to check |
1430 | * it in the driver, hardware does not do it for us. | |
1431 | * Since L3L4P bit was set we assume a valid IHL value (>=5) | |
1432 | * so the total length of IPv4 header is IHL*4 bytes | |
1433 | * The UDP_0 bit *may* bet set if the *inner* header is UDP | |
1434 | */ | |
f6385979 | 1435 | if (ipv4_tunnel) { |
8144f0f7 JG |
1436 | skb->transport_header = skb->mac_header + |
1437 | sizeof(struct ethhdr) + | |
1438 | (ip_hdr(skb)->ihl * 4); | |
1439 | ||
1440 | /* Add 4 bytes for VLAN tagged packets */ | |
1441 | skb->transport_header += (skb->protocol == htons(ETH_P_8021Q) || | |
1442 | skb->protocol == htons(ETH_P_8021AD)) | |
1443 | ? VLAN_HLEN : 0; | |
1444 | ||
f6385979 AS |
1445 | if ((ip_hdr(skb)->protocol == IPPROTO_UDP) && |
1446 | (udp_hdr(skb)->check != 0)) { | |
1447 | rx_udp_csum = udp_csum(skb); | |
1448 | iph = ip_hdr(skb); | |
1449 | csum = csum_tcpudp_magic( | |
1450 | iph->saddr, iph->daddr, | |
1451 | (skb->len - skb_transport_offset(skb)), | |
1452 | IPPROTO_UDP, rx_udp_csum); | |
8144f0f7 | 1453 | |
f6385979 AS |
1454 | if (udp_hdr(skb)->check != csum) |
1455 | goto checksum_fail; | |
1456 | ||
1457 | } /* else its GRE and so no outer UDP header */ | |
8144f0f7 JG |
1458 | } |
1459 | ||
fd0a05ce | 1460 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
fa4ba69b | 1461 | skb->csum_level = ipv4_tunnel || ipv6_tunnel; |
8a3c91cc JB |
1462 | |
1463 | return; | |
1464 | ||
1465 | checksum_fail: | |
1466 | vsi->back->hw_csum_rx_error++; | |
fd0a05ce JB |
1467 | } |
1468 | ||
1469 | /** | |
1470 | * i40e_rx_hash - returns the hash value from the Rx descriptor | |
1471 | * @ring: descriptor ring | |
1472 | * @rx_desc: specific descriptor | |
1473 | **/ | |
1474 | static inline u32 i40e_rx_hash(struct i40e_ring *ring, | |
1475 | union i40e_rx_desc *rx_desc) | |
1476 | { | |
8a494920 JB |
1477 | const __le64 rss_mask = |
1478 | cpu_to_le64((u64)I40E_RX_DESC_FLTSTAT_RSS_HASH << | |
1479 | I40E_RX_DESC_STATUS_FLTSTAT_SHIFT); | |
1480 | ||
1481 | if ((ring->netdev->features & NETIF_F_RXHASH) && | |
1482 | (rx_desc->wb.qword1.status_error_len & rss_mask) == rss_mask) | |
1483 | return le32_to_cpu(rx_desc->wb.qword0.hi_dword.rss); | |
1484 | else | |
1485 | return 0; | |
fd0a05ce JB |
1486 | } |
1487 | ||
206812b5 JB |
1488 | /** |
1489 | * i40e_ptype_to_hash - get a hash type | |
1490 | * @ptype: the ptype value from the descriptor | |
1491 | * | |
1492 | * Returns a hash type to be used by skb_set_hash | |
1493 | **/ | |
1494 | static inline enum pkt_hash_types i40e_ptype_to_hash(u8 ptype) | |
1495 | { | |
1496 | struct i40e_rx_ptype_decoded decoded = decode_rx_desc_ptype(ptype); | |
1497 | ||
1498 | if (!decoded.known) | |
1499 | return PKT_HASH_TYPE_NONE; | |
1500 | ||
1501 | if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP && | |
1502 | decoded.payload_layer == I40E_RX_PTYPE_PAYLOAD_LAYER_PAY4) | |
1503 | return PKT_HASH_TYPE_L4; | |
1504 | else if (decoded.outer_ip == I40E_RX_PTYPE_OUTER_IP && | |
1505 | decoded.payload_layer == I40E_RX_PTYPE_PAYLOAD_LAYER_PAY3) | |
1506 | return PKT_HASH_TYPE_L3; | |
1507 | else | |
1508 | return PKT_HASH_TYPE_L2; | |
1509 | } | |
1510 | ||
fd0a05ce | 1511 | /** |
a132af24 | 1512 | * i40e_clean_rx_irq_ps - Reclaim resources after receive; packet split |
fd0a05ce JB |
1513 | * @rx_ring: rx ring to clean |
1514 | * @budget: how many cleans we're allowed | |
1515 | * | |
1516 | * Returns true if there's any budget left (e.g. the clean is finished) | |
1517 | **/ | |
a132af24 | 1518 | static int i40e_clean_rx_irq_ps(struct i40e_ring *rx_ring, int budget) |
fd0a05ce JB |
1519 | { |
1520 | unsigned int total_rx_bytes = 0, total_rx_packets = 0; | |
1521 | u16 rx_packet_len, rx_header_len, rx_sph, rx_hbo; | |
1522 | u16 cleaned_count = I40E_DESC_UNUSED(rx_ring); | |
1523 | const int current_node = numa_node_id(); | |
1524 | struct i40e_vsi *vsi = rx_ring->vsi; | |
1525 | u16 i = rx_ring->next_to_clean; | |
1526 | union i40e_rx_desc *rx_desc; | |
1527 | u32 rx_error, rx_status; | |
206812b5 | 1528 | u8 rx_ptype; |
fd0a05ce JB |
1529 | u64 qword; |
1530 | ||
390f86df EB |
1531 | if (budget <= 0) |
1532 | return 0; | |
1533 | ||
a132af24 | 1534 | do { |
fd0a05ce JB |
1535 | struct i40e_rx_buffer *rx_bi; |
1536 | struct sk_buff *skb; | |
1537 | u16 vlan_tag; | |
a132af24 MW |
1538 | /* return some buffers to hardware, one at a time is too slow */ |
1539 | if (cleaned_count >= I40E_RX_BUFFER_WRITE) { | |
1540 | i40e_alloc_rx_buffers_ps(rx_ring, cleaned_count); | |
1541 | cleaned_count = 0; | |
1542 | } | |
1543 | ||
1544 | i = rx_ring->next_to_clean; | |
1545 | rx_desc = I40E_RX_DESC(rx_ring, i); | |
1546 | qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); | |
1547 | rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >> | |
1548 | I40E_RXD_QW1_STATUS_SHIFT; | |
1549 | ||
1550 | if (!(rx_status & (1 << I40E_RX_DESC_STATUS_DD_SHIFT))) | |
1551 | break; | |
1552 | ||
1553 | /* This memory barrier is needed to keep us from reading | |
1554 | * any other fields out of the rx_desc until we know the | |
1555 | * DD bit is set. | |
1556 | */ | |
1557 | rmb(); | |
fd0a05ce JB |
1558 | if (i40e_rx_is_programming_status(qword)) { |
1559 | i40e_clean_programming_status(rx_ring, rx_desc); | |
a132af24 MW |
1560 | I40E_RX_INCREMENT(rx_ring, i); |
1561 | continue; | |
fd0a05ce JB |
1562 | } |
1563 | rx_bi = &rx_ring->rx_bi[i]; | |
1564 | skb = rx_bi->skb; | |
a132af24 MW |
1565 | if (likely(!skb)) { |
1566 | skb = netdev_alloc_skb_ip_align(rx_ring->netdev, | |
1567 | rx_ring->rx_hdr_len); | |
8b6ed9c2 | 1568 | if (!skb) { |
a132af24 | 1569 | rx_ring->rx_stats.alloc_buff_failed++; |
8b6ed9c2 JB |
1570 | break; |
1571 | } | |
1572 | ||
a132af24 MW |
1573 | /* initialize queue mapping */ |
1574 | skb_record_rx_queue(skb, rx_ring->queue_index); | |
1575 | /* we are reusing so sync this buffer for CPU use */ | |
1576 | dma_sync_single_range_for_cpu(rx_ring->dev, | |
1577 | rx_bi->dma, | |
1578 | 0, | |
1579 | rx_ring->rx_hdr_len, | |
1580 | DMA_FROM_DEVICE); | |
1581 | } | |
829af3ac MW |
1582 | rx_packet_len = (qword & I40E_RXD_QW1_LENGTH_PBUF_MASK) >> |
1583 | I40E_RXD_QW1_LENGTH_PBUF_SHIFT; | |
1584 | rx_header_len = (qword & I40E_RXD_QW1_LENGTH_HBUF_MASK) >> | |
1585 | I40E_RXD_QW1_LENGTH_HBUF_SHIFT; | |
1586 | rx_sph = (qword & I40E_RXD_QW1_LENGTH_SPH_MASK) >> | |
1587 | I40E_RXD_QW1_LENGTH_SPH_SHIFT; | |
1588 | ||
1589 | rx_error = (qword & I40E_RXD_QW1_ERROR_MASK) >> | |
1590 | I40E_RXD_QW1_ERROR_SHIFT; | |
fd0a05ce JB |
1591 | rx_hbo = rx_error & (1 << I40E_RX_DESC_ERROR_HBO_SHIFT); |
1592 | rx_error &= ~(1 << I40E_RX_DESC_ERROR_HBO_SHIFT); | |
1593 | ||
8144f0f7 JG |
1594 | rx_ptype = (qword & I40E_RXD_QW1_PTYPE_MASK) >> |
1595 | I40E_RXD_QW1_PTYPE_SHIFT; | |
a132af24 | 1596 | prefetch(rx_bi->page); |
fd0a05ce | 1597 | rx_bi->skb = NULL; |
a132af24 MW |
1598 | cleaned_count++; |
1599 | if (rx_hbo || rx_sph) { | |
1600 | int len; | |
fd0a05ce JB |
1601 | if (rx_hbo) |
1602 | len = I40E_RX_HDR_SIZE; | |
fd0a05ce | 1603 | else |
a132af24 MW |
1604 | len = rx_header_len; |
1605 | memcpy(__skb_put(skb, len), rx_bi->hdr_buf, len); | |
1606 | } else if (skb->len == 0) { | |
1607 | int len; | |
1608 | ||
1609 | len = (rx_packet_len > skb_headlen(skb) ? | |
1610 | skb_headlen(skb) : rx_packet_len); | |
1611 | memcpy(__skb_put(skb, len), | |
1612 | rx_bi->page + rx_bi->page_offset, | |
1613 | len); | |
1614 | rx_bi->page_offset += len; | |
1615 | rx_packet_len -= len; | |
fd0a05ce JB |
1616 | } |
1617 | ||
1618 | /* Get the rest of the data if this was a header split */ | |
a132af24 | 1619 | if (rx_packet_len) { |
fd0a05ce JB |
1620 | skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags, |
1621 | rx_bi->page, | |
1622 | rx_bi->page_offset, | |
1623 | rx_packet_len); | |
1624 | ||
1625 | skb->len += rx_packet_len; | |
1626 | skb->data_len += rx_packet_len; | |
1627 | skb->truesize += rx_packet_len; | |
1628 | ||
1629 | if ((page_count(rx_bi->page) == 1) && | |
1630 | (page_to_nid(rx_bi->page) == current_node)) | |
1631 | get_page(rx_bi->page); | |
1632 | else | |
1633 | rx_bi->page = NULL; | |
1634 | ||
1635 | dma_unmap_page(rx_ring->dev, | |
1636 | rx_bi->page_dma, | |
1637 | PAGE_SIZE / 2, | |
1638 | DMA_FROM_DEVICE); | |
1639 | rx_bi->page_dma = 0; | |
1640 | } | |
a132af24 | 1641 | I40E_RX_INCREMENT(rx_ring, i); |
fd0a05ce JB |
1642 | |
1643 | if (unlikely( | |
1644 | !(rx_status & (1 << I40E_RX_DESC_STATUS_EOF_SHIFT)))) { | |
1645 | struct i40e_rx_buffer *next_buffer; | |
1646 | ||
1647 | next_buffer = &rx_ring->rx_bi[i]; | |
a132af24 | 1648 | next_buffer->skb = skb; |
fd0a05ce | 1649 | rx_ring->rx_stats.non_eop_descs++; |
a132af24 | 1650 | continue; |
fd0a05ce JB |
1651 | } |
1652 | ||
1653 | /* ERR_MASK will only have valid bits if EOP set */ | |
1654 | if (unlikely(rx_error & (1 << I40E_RX_DESC_ERROR_RXE_SHIFT))) { | |
1655 | dev_kfree_skb_any(skb); | |
8a3c91cc JB |
1656 | /* TODO: shouldn't we increment a counter indicating the |
1657 | * drop? | |
1658 | */ | |
a132af24 | 1659 | continue; |
fd0a05ce JB |
1660 | } |
1661 | ||
206812b5 JB |
1662 | skb_set_hash(skb, i40e_rx_hash(rx_ring, rx_desc), |
1663 | i40e_ptype_to_hash(rx_ptype)); | |
beb0dff1 JK |
1664 | if (unlikely(rx_status & I40E_RXD_QW1_STATUS_TSYNVALID_MASK)) { |
1665 | i40e_ptp_rx_hwtstamp(vsi->back, skb, (rx_status & | |
1666 | I40E_RXD_QW1_STATUS_TSYNINDX_MASK) >> | |
1667 | I40E_RXD_QW1_STATUS_TSYNINDX_SHIFT); | |
1668 | rx_ring->last_rx_timestamp = jiffies; | |
1669 | } | |
1670 | ||
fd0a05ce JB |
1671 | /* probably a little skewed due to removing CRC */ |
1672 | total_rx_bytes += skb->len; | |
1673 | total_rx_packets++; | |
1674 | ||
1675 | skb->protocol = eth_type_trans(skb, rx_ring->netdev); | |
8144f0f7 JG |
1676 | |
1677 | i40e_rx_checksum(vsi, skb, rx_status, rx_error, rx_ptype); | |
1678 | ||
fd0a05ce JB |
1679 | vlan_tag = rx_status & (1 << I40E_RX_DESC_STATUS_L2TAG1P_SHIFT) |
1680 | ? le16_to_cpu(rx_desc->wb.qword0.lo_dword.l2tag1) | |
1681 | : 0; | |
38e00438 VD |
1682 | #ifdef I40E_FCOE |
1683 | if (!i40e_fcoe_handle_offload(rx_ring, rx_desc, skb)) { | |
1684 | dev_kfree_skb_any(skb); | |
a132af24 | 1685 | continue; |
38e00438 VD |
1686 | } |
1687 | #endif | |
a132af24 | 1688 | skb_mark_napi_id(skb, &rx_ring->q_vector->napi); |
fd0a05ce JB |
1689 | i40e_receive_skb(rx_ring, skb, vlan_tag); |
1690 | ||
1691 | rx_ring->netdev->last_rx = jiffies; | |
fd0a05ce | 1692 | rx_desc->wb.qword1.status_error_len = 0; |
fd0a05ce | 1693 | |
a132af24 MW |
1694 | } while (likely(total_rx_packets < budget)); |
1695 | ||
1696 | u64_stats_update_begin(&rx_ring->syncp); | |
1697 | rx_ring->stats.packets += total_rx_packets; | |
1698 | rx_ring->stats.bytes += total_rx_bytes; | |
1699 | u64_stats_update_end(&rx_ring->syncp); | |
1700 | rx_ring->q_vector->rx.total_packets += total_rx_packets; | |
1701 | rx_ring->q_vector->rx.total_bytes += total_rx_bytes; | |
1702 | ||
1703 | return total_rx_packets; | |
1704 | } | |
1705 | ||
1706 | /** | |
1707 | * i40e_clean_rx_irq_1buf - Reclaim resources after receive; single buffer | |
1708 | * @rx_ring: rx ring to clean | |
1709 | * @budget: how many cleans we're allowed | |
1710 | * | |
1711 | * Returns number of packets cleaned | |
1712 | **/ | |
1713 | static int i40e_clean_rx_irq_1buf(struct i40e_ring *rx_ring, int budget) | |
1714 | { | |
1715 | unsigned int total_rx_bytes = 0, total_rx_packets = 0; | |
1716 | u16 cleaned_count = I40E_DESC_UNUSED(rx_ring); | |
1717 | struct i40e_vsi *vsi = rx_ring->vsi; | |
1718 | union i40e_rx_desc *rx_desc; | |
1719 | u32 rx_error, rx_status; | |
1720 | u16 rx_packet_len; | |
1721 | u8 rx_ptype; | |
1722 | u64 qword; | |
1723 | u16 i; | |
1724 | ||
1725 | do { | |
1726 | struct i40e_rx_buffer *rx_bi; | |
1727 | struct sk_buff *skb; | |
1728 | u16 vlan_tag; | |
fd0a05ce JB |
1729 | /* return some buffers to hardware, one at a time is too slow */ |
1730 | if (cleaned_count >= I40E_RX_BUFFER_WRITE) { | |
a132af24 | 1731 | i40e_alloc_rx_buffers_1buf(rx_ring, cleaned_count); |
fd0a05ce JB |
1732 | cleaned_count = 0; |
1733 | } | |
1734 | ||
a132af24 MW |
1735 | i = rx_ring->next_to_clean; |
1736 | rx_desc = I40E_RX_DESC(rx_ring, i); | |
fd0a05ce | 1737 | qword = le64_to_cpu(rx_desc->wb.qword1.status_error_len); |
829af3ac | 1738 | rx_status = (qword & I40E_RXD_QW1_STATUS_MASK) >> |
a132af24 MW |
1739 | I40E_RXD_QW1_STATUS_SHIFT; |
1740 | ||
1741 | if (!(rx_status & (1 << I40E_RX_DESC_STATUS_DD_SHIFT))) | |
1742 | break; | |
1743 | ||
1744 | /* This memory barrier is needed to keep us from reading | |
1745 | * any other fields out of the rx_desc until we know the | |
1746 | * DD bit is set. | |
1747 | */ | |
1748 | rmb(); | |
1749 | ||
1750 | if (i40e_rx_is_programming_status(qword)) { | |
1751 | i40e_clean_programming_status(rx_ring, rx_desc); | |
1752 | I40E_RX_INCREMENT(rx_ring, i); | |
1753 | continue; | |
1754 | } | |
1755 | rx_bi = &rx_ring->rx_bi[i]; | |
1756 | skb = rx_bi->skb; | |
1757 | prefetch(skb->data); | |
1758 | ||
1759 | rx_packet_len = (qword & I40E_RXD_QW1_LENGTH_PBUF_MASK) >> | |
1760 | I40E_RXD_QW1_LENGTH_PBUF_SHIFT; | |
1761 | ||
1762 | rx_error = (qword & I40E_RXD_QW1_ERROR_MASK) >> | |
1763 | I40E_RXD_QW1_ERROR_SHIFT; | |
1764 | rx_error &= ~(1 << I40E_RX_DESC_ERROR_HBO_SHIFT); | |
1765 | ||
1766 | rx_ptype = (qword & I40E_RXD_QW1_PTYPE_MASK) >> | |
1767 | I40E_RXD_QW1_PTYPE_SHIFT; | |
1768 | rx_bi->skb = NULL; | |
1769 | cleaned_count++; | |
1770 | ||
1771 | /* Get the header and possibly the whole packet | |
1772 | * If this is an skb from previous receive dma will be 0 | |
1773 | */ | |
1774 | skb_put(skb, rx_packet_len); | |
1775 | dma_unmap_single(rx_ring->dev, rx_bi->dma, rx_ring->rx_buf_len, | |
1776 | DMA_FROM_DEVICE); | |
1777 | rx_bi->dma = 0; | |
1778 | ||
1779 | I40E_RX_INCREMENT(rx_ring, i); | |
1780 | ||
1781 | if (unlikely( | |
1782 | !(rx_status & (1 << I40E_RX_DESC_STATUS_EOF_SHIFT)))) { | |
1783 | rx_ring->rx_stats.non_eop_descs++; | |
1784 | continue; | |
1785 | } | |
1786 | ||
1787 | /* ERR_MASK will only have valid bits if EOP set */ | |
1788 | if (unlikely(rx_error & (1 << I40E_RX_DESC_ERROR_RXE_SHIFT))) { | |
1789 | dev_kfree_skb_any(skb); | |
1790 | /* TODO: shouldn't we increment a counter indicating the | |
1791 | * drop? | |
1792 | */ | |
1793 | continue; | |
1794 | } | |
1795 | ||
1796 | skb_set_hash(skb, i40e_rx_hash(rx_ring, rx_desc), | |
1797 | i40e_ptype_to_hash(rx_ptype)); | |
1798 | if (unlikely(rx_status & I40E_RXD_QW1_STATUS_TSYNVALID_MASK)) { | |
1799 | i40e_ptp_rx_hwtstamp(vsi->back, skb, (rx_status & | |
1800 | I40E_RXD_QW1_STATUS_TSYNINDX_MASK) >> | |
1801 | I40E_RXD_QW1_STATUS_TSYNINDX_SHIFT); | |
1802 | rx_ring->last_rx_timestamp = jiffies; | |
1803 | } | |
1804 | ||
1805 | /* probably a little skewed due to removing CRC */ | |
1806 | total_rx_bytes += skb->len; | |
1807 | total_rx_packets++; | |
1808 | ||
1809 | skb->protocol = eth_type_trans(skb, rx_ring->netdev); | |
1810 | ||
1811 | i40e_rx_checksum(vsi, skb, rx_status, rx_error, rx_ptype); | |
1812 | ||
1813 | vlan_tag = rx_status & (1 << I40E_RX_DESC_STATUS_L2TAG1P_SHIFT) | |
1814 | ? le16_to_cpu(rx_desc->wb.qword0.lo_dword.l2tag1) | |
1815 | : 0; | |
1816 | #ifdef I40E_FCOE | |
1817 | if (!i40e_fcoe_handle_offload(rx_ring, rx_desc, skb)) { | |
1818 | dev_kfree_skb_any(skb); | |
1819 | continue; | |
1820 | } | |
1821 | #endif | |
1822 | i40e_receive_skb(rx_ring, skb, vlan_tag); | |
1823 | ||
1824 | rx_ring->netdev->last_rx = jiffies; | |
1825 | rx_desc->wb.qword1.status_error_len = 0; | |
1826 | } while (likely(total_rx_packets < budget)); | |
fd0a05ce | 1827 | |
980e9b11 | 1828 | u64_stats_update_begin(&rx_ring->syncp); |
a114d0a6 AD |
1829 | rx_ring->stats.packets += total_rx_packets; |
1830 | rx_ring->stats.bytes += total_rx_bytes; | |
980e9b11 | 1831 | u64_stats_update_end(&rx_ring->syncp); |
fd0a05ce JB |
1832 | rx_ring->q_vector->rx.total_packets += total_rx_packets; |
1833 | rx_ring->q_vector->rx.total_bytes += total_rx_bytes; | |
1834 | ||
a132af24 | 1835 | return total_rx_packets; |
fd0a05ce JB |
1836 | } |
1837 | ||
1838 | /** | |
1839 | * i40e_napi_poll - NAPI polling Rx/Tx cleanup routine | |
1840 | * @napi: napi struct with our devices info in it | |
1841 | * @budget: amount of work driver is allowed to do this pass, in packets | |
1842 | * | |
1843 | * This function will clean all queues associated with a q_vector. | |
1844 | * | |
1845 | * Returns the amount of work done | |
1846 | **/ | |
1847 | int i40e_napi_poll(struct napi_struct *napi, int budget) | |
1848 | { | |
1849 | struct i40e_q_vector *q_vector = | |
1850 | container_of(napi, struct i40e_q_vector, napi); | |
1851 | struct i40e_vsi *vsi = q_vector->vsi; | |
cd0b6fa6 | 1852 | struct i40e_ring *ring; |
fd0a05ce | 1853 | bool clean_complete = true; |
d91649f5 | 1854 | bool arm_wb = false; |
fd0a05ce | 1855 | int budget_per_ring; |
a132af24 | 1856 | int cleaned; |
fd0a05ce JB |
1857 | |
1858 | if (test_bit(__I40E_DOWN, &vsi->state)) { | |
1859 | napi_complete(napi); | |
1860 | return 0; | |
1861 | } | |
1862 | ||
cd0b6fa6 AD |
1863 | /* Since the actual Tx work is minimal, we can give the Tx a larger |
1864 | * budget and be more aggressive about cleaning up the Tx descriptors. | |
1865 | */ | |
d91649f5 | 1866 | i40e_for_each_ring(ring, q_vector->tx) { |
cd0b6fa6 | 1867 | clean_complete &= i40e_clean_tx_irq(ring, vsi->work_limit); |
d91649f5 JB |
1868 | arm_wb |= ring->arm_wb; |
1869 | } | |
cd0b6fa6 | 1870 | |
fd0a05ce JB |
1871 | /* We attempt to distribute budget to each Rx queue fairly, but don't |
1872 | * allow the budget to go below 1 because that would exit polling early. | |
fd0a05ce JB |
1873 | */ |
1874 | budget_per_ring = max(budget/q_vector->num_ringpairs, 1); | |
cd0b6fa6 | 1875 | |
a132af24 MW |
1876 | i40e_for_each_ring(ring, q_vector->rx) { |
1877 | if (ring_is_ps_enabled(ring)) | |
1878 | cleaned = i40e_clean_rx_irq_ps(ring, budget_per_ring); | |
1879 | else | |
1880 | cleaned = i40e_clean_rx_irq_1buf(ring, budget_per_ring); | |
1881 | /* if we didn't clean as many as budgeted, we must be done */ | |
1882 | clean_complete &= (budget_per_ring != cleaned); | |
1883 | } | |
fd0a05ce JB |
1884 | |
1885 | /* If work not completed, return budget and polling will return */ | |
d91649f5 JB |
1886 | if (!clean_complete) { |
1887 | if (arm_wb) | |
1888 | i40e_force_wb(vsi, q_vector); | |
fd0a05ce | 1889 | return budget; |
d91649f5 | 1890 | } |
fd0a05ce JB |
1891 | |
1892 | /* Work is done so exit the polling mode and re-enable the interrupt */ | |
1893 | napi_complete(napi); | |
1894 | if (ITR_IS_DYNAMIC(vsi->rx_itr_setting) || | |
1895 | ITR_IS_DYNAMIC(vsi->tx_itr_setting)) | |
1896 | i40e_update_dynamic_itr(q_vector); | |
1897 | ||
1898 | if (!test_bit(__I40E_DOWN, &vsi->state)) { | |
1899 | if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED) { | |
1900 | i40e_irq_dynamic_enable(vsi, | |
1901 | q_vector->v_idx + vsi->base_vector); | |
1902 | } else { | |
1903 | struct i40e_hw *hw = &vsi->back->hw; | |
1904 | /* We re-enable the queue 0 cause, but | |
1905 | * don't worry about dynamic_enable | |
1906 | * because we left it on for the other | |
1907 | * possible interrupts during napi | |
1908 | */ | |
1909 | u32 qval = rd32(hw, I40E_QINT_RQCTL(0)); | |
1910 | qval |= I40E_QINT_RQCTL_CAUSE_ENA_MASK; | |
1911 | wr32(hw, I40E_QINT_RQCTL(0), qval); | |
1912 | ||
1913 | qval = rd32(hw, I40E_QINT_TQCTL(0)); | |
1914 | qval |= I40E_QINT_TQCTL_CAUSE_ENA_MASK; | |
1915 | wr32(hw, I40E_QINT_TQCTL(0), qval); | |
116a57d4 SN |
1916 | |
1917 | i40e_irq_dynamic_enable_icr0(vsi->back); | |
fd0a05ce JB |
1918 | } |
1919 | } | |
1920 | ||
1921 | return 0; | |
1922 | } | |
1923 | ||
1924 | /** | |
1925 | * i40e_atr - Add a Flow Director ATR filter | |
1926 | * @tx_ring: ring to add programming descriptor to | |
1927 | * @skb: send buffer | |
1928 | * @flags: send flags | |
1929 | * @protocol: wire protocol | |
1930 | **/ | |
1931 | static void i40e_atr(struct i40e_ring *tx_ring, struct sk_buff *skb, | |
1932 | u32 flags, __be16 protocol) | |
1933 | { | |
1934 | struct i40e_filter_program_desc *fdir_desc; | |
1935 | struct i40e_pf *pf = tx_ring->vsi->back; | |
1936 | union { | |
1937 | unsigned char *network; | |
1938 | struct iphdr *ipv4; | |
1939 | struct ipv6hdr *ipv6; | |
1940 | } hdr; | |
1941 | struct tcphdr *th; | |
1942 | unsigned int hlen; | |
1943 | u32 flex_ptype, dtype_cmd; | |
fc4ac67b | 1944 | u16 i; |
fd0a05ce JB |
1945 | |
1946 | /* make sure ATR is enabled */ | |
60ea5f83 | 1947 | if (!(pf->flags & I40E_FLAG_FD_ATR_ENABLED)) |
fd0a05ce JB |
1948 | return; |
1949 | ||
04294e38 ASJ |
1950 | if ((pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED)) |
1951 | return; | |
1952 | ||
fd0a05ce JB |
1953 | /* if sampling is disabled do nothing */ |
1954 | if (!tx_ring->atr_sample_rate) | |
1955 | return; | |
1956 | ||
fd0a05ce JB |
1957 | /* snag network header to get L4 type and address */ |
1958 | hdr.network = skb_network_header(skb); | |
1959 | ||
1960 | /* Currently only IPv4/IPv6 with TCP is supported */ | |
1961 | if (protocol == htons(ETH_P_IP)) { | |
1962 | if (hdr.ipv4->protocol != IPPROTO_TCP) | |
1963 | return; | |
1964 | ||
1965 | /* access ihl as a u8 to avoid unaligned access on ia64 */ | |
1966 | hlen = (hdr.network[0] & 0x0F) << 2; | |
1967 | } else if (protocol == htons(ETH_P_IPV6)) { | |
1968 | if (hdr.ipv6->nexthdr != IPPROTO_TCP) | |
1969 | return; | |
1970 | ||
1971 | hlen = sizeof(struct ipv6hdr); | |
1972 | } else { | |
1973 | return; | |
1974 | } | |
1975 | ||
1976 | th = (struct tcphdr *)(hdr.network + hlen); | |
1977 | ||
55a5e60b ASJ |
1978 | /* Due to lack of space, no more new filters can be programmed */ |
1979 | if (th->syn && (pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED)) | |
1980 | return; | |
1981 | ||
1982 | tx_ring->atr_count++; | |
1983 | ||
ce806783 ASJ |
1984 | /* sample on all syn/fin/rst packets or once every atr sample rate */ |
1985 | if (!th->fin && | |
1986 | !th->syn && | |
1987 | !th->rst && | |
1988 | (tx_ring->atr_count < tx_ring->atr_sample_rate)) | |
fd0a05ce JB |
1989 | return; |
1990 | ||
1991 | tx_ring->atr_count = 0; | |
1992 | ||
1993 | /* grab the next descriptor */ | |
fc4ac67b AD |
1994 | i = tx_ring->next_to_use; |
1995 | fdir_desc = I40E_TX_FDIRDESC(tx_ring, i); | |
1996 | ||
1997 | i++; | |
1998 | tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; | |
fd0a05ce JB |
1999 | |
2000 | flex_ptype = (tx_ring->queue_index << I40E_TXD_FLTR_QW0_QINDEX_SHIFT) & | |
2001 | I40E_TXD_FLTR_QW0_QINDEX_MASK; | |
2002 | flex_ptype |= (protocol == htons(ETH_P_IP)) ? | |
2003 | (I40E_FILTER_PCTYPE_NONF_IPV4_TCP << | |
2004 | I40E_TXD_FLTR_QW0_PCTYPE_SHIFT) : | |
2005 | (I40E_FILTER_PCTYPE_NONF_IPV6_TCP << | |
2006 | I40E_TXD_FLTR_QW0_PCTYPE_SHIFT); | |
2007 | ||
2008 | flex_ptype |= tx_ring->vsi->id << I40E_TXD_FLTR_QW0_DEST_VSI_SHIFT; | |
2009 | ||
2010 | dtype_cmd = I40E_TX_DESC_DTYPE_FILTER_PROG; | |
2011 | ||
ce806783 | 2012 | dtype_cmd |= (th->fin || th->rst) ? |
fd0a05ce JB |
2013 | (I40E_FILTER_PROGRAM_DESC_PCMD_REMOVE << |
2014 | I40E_TXD_FLTR_QW1_PCMD_SHIFT) : | |
2015 | (I40E_FILTER_PROGRAM_DESC_PCMD_ADD_UPDATE << | |
2016 | I40E_TXD_FLTR_QW1_PCMD_SHIFT); | |
2017 | ||
2018 | dtype_cmd |= I40E_FILTER_PROGRAM_DESC_DEST_DIRECT_PACKET_QINDEX << | |
2019 | I40E_TXD_FLTR_QW1_DEST_SHIFT; | |
2020 | ||
2021 | dtype_cmd |= I40E_FILTER_PROGRAM_DESC_FD_STATUS_FD_ID << | |
2022 | I40E_TXD_FLTR_QW1_FD_STATUS_SHIFT; | |
2023 | ||
433c47de ASJ |
2024 | dtype_cmd |= I40E_TXD_FLTR_QW1_CNT_ENA_MASK; |
2025 | dtype_cmd |= | |
2026 | ((u32)pf->fd_atr_cnt_idx << I40E_TXD_FLTR_QW1_CNTINDEX_SHIFT) & | |
2027 | I40E_TXD_FLTR_QW1_CNTINDEX_MASK; | |
2028 | ||
fd0a05ce | 2029 | fdir_desc->qindex_flex_ptype_vsi = cpu_to_le32(flex_ptype); |
99753ea6 | 2030 | fdir_desc->rsvd = cpu_to_le32(0); |
fd0a05ce | 2031 | fdir_desc->dtype_cmd_cntindex = cpu_to_le32(dtype_cmd); |
99753ea6 | 2032 | fdir_desc->fd_id = cpu_to_le32(0); |
fd0a05ce JB |
2033 | } |
2034 | ||
fd0a05ce JB |
2035 | /** |
2036 | * i40e_tx_prepare_vlan_flags - prepare generic TX VLAN tagging flags for HW | |
2037 | * @skb: send buffer | |
2038 | * @tx_ring: ring to send buffer on | |
2039 | * @flags: the tx flags to be set | |
2040 | * | |
2041 | * Checks the skb and set up correspondingly several generic transmit flags | |
2042 | * related to VLAN tagging for the HW, such as VLAN, DCB, etc. | |
2043 | * | |
2044 | * Returns error code indicate the frame should be dropped upon error and the | |
2045 | * otherwise returns 0 to indicate the flags has been set properly. | |
2046 | **/ | |
38e00438 VD |
2047 | #ifdef I40E_FCOE |
2048 | int i40e_tx_prepare_vlan_flags(struct sk_buff *skb, | |
2049 | struct i40e_ring *tx_ring, | |
2050 | u32 *flags) | |
2051 | #else | |
fd0a05ce JB |
2052 | static int i40e_tx_prepare_vlan_flags(struct sk_buff *skb, |
2053 | struct i40e_ring *tx_ring, | |
2054 | u32 *flags) | |
38e00438 | 2055 | #endif |
fd0a05ce JB |
2056 | { |
2057 | __be16 protocol = skb->protocol; | |
2058 | u32 tx_flags = 0; | |
2059 | ||
31eaaccf GR |
2060 | if (protocol == htons(ETH_P_8021Q) && |
2061 | !(tx_ring->netdev->features & NETIF_F_HW_VLAN_CTAG_TX)) { | |
2062 | /* When HW VLAN acceleration is turned off by the user the | |
2063 | * stack sets the protocol to 8021q so that the driver | |
2064 | * can take any steps required to support the SW only | |
2065 | * VLAN handling. In our case the driver doesn't need | |
2066 | * to take any further steps so just set the protocol | |
2067 | * to the encapsulated ethertype. | |
2068 | */ | |
2069 | skb->protocol = vlan_get_protocol(skb); | |
2070 | goto out; | |
2071 | } | |
2072 | ||
fd0a05ce | 2073 | /* if we have a HW VLAN tag being added, default to the HW one */ |
df8a39de JP |
2074 | if (skb_vlan_tag_present(skb)) { |
2075 | tx_flags |= skb_vlan_tag_get(skb) << I40E_TX_FLAGS_VLAN_SHIFT; | |
fd0a05ce JB |
2076 | tx_flags |= I40E_TX_FLAGS_HW_VLAN; |
2077 | /* else if it is a SW VLAN, check the next protocol and store the tag */ | |
0e2fe46c | 2078 | } else if (protocol == htons(ETH_P_8021Q)) { |
fd0a05ce JB |
2079 | struct vlan_hdr *vhdr, _vhdr; |
2080 | vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr); | |
2081 | if (!vhdr) | |
2082 | return -EINVAL; | |
2083 | ||
2084 | protocol = vhdr->h_vlan_encapsulated_proto; | |
2085 | tx_flags |= ntohs(vhdr->h_vlan_TCI) << I40E_TX_FLAGS_VLAN_SHIFT; | |
2086 | tx_flags |= I40E_TX_FLAGS_SW_VLAN; | |
2087 | } | |
2088 | ||
d40d00b1 NP |
2089 | if (!(tx_ring->vsi->back->flags & I40E_FLAG_DCB_ENABLED)) |
2090 | goto out; | |
2091 | ||
fd0a05ce | 2092 | /* Insert 802.1p priority into VLAN header */ |
38e00438 VD |
2093 | if ((tx_flags & (I40E_TX_FLAGS_HW_VLAN | I40E_TX_FLAGS_SW_VLAN)) || |
2094 | (skb->priority != TC_PRIO_CONTROL)) { | |
fd0a05ce JB |
2095 | tx_flags &= ~I40E_TX_FLAGS_VLAN_PRIO_MASK; |
2096 | tx_flags |= (skb->priority & 0x7) << | |
2097 | I40E_TX_FLAGS_VLAN_PRIO_SHIFT; | |
2098 | if (tx_flags & I40E_TX_FLAGS_SW_VLAN) { | |
2099 | struct vlan_ethhdr *vhdr; | |
dd225bc6 FR |
2100 | int rc; |
2101 | ||
2102 | rc = skb_cow_head(skb, 0); | |
2103 | if (rc < 0) | |
2104 | return rc; | |
fd0a05ce JB |
2105 | vhdr = (struct vlan_ethhdr *)skb->data; |
2106 | vhdr->h_vlan_TCI = htons(tx_flags >> | |
2107 | I40E_TX_FLAGS_VLAN_SHIFT); | |
2108 | } else { | |
2109 | tx_flags |= I40E_TX_FLAGS_HW_VLAN; | |
2110 | } | |
2111 | } | |
d40d00b1 NP |
2112 | |
2113 | out: | |
fd0a05ce JB |
2114 | *flags = tx_flags; |
2115 | return 0; | |
2116 | } | |
2117 | ||
fd0a05ce JB |
2118 | /** |
2119 | * i40e_tso - set up the tso context descriptor | |
2120 | * @tx_ring: ptr to the ring to send | |
2121 | * @skb: ptr to the skb we're sending | |
2122 | * @tx_flags: the collected send information | |
2123 | * @protocol: the send protocol | |
2124 | * @hdr_len: ptr to the size of the packet header | |
2125 | * @cd_tunneling: ptr to context descriptor bits | |
2126 | * | |
2127 | * Returns 0 if no TSO can happen, 1 if tso is going, or error | |
2128 | **/ | |
2129 | static int i40e_tso(struct i40e_ring *tx_ring, struct sk_buff *skb, | |
2130 | u32 tx_flags, __be16 protocol, u8 *hdr_len, | |
2131 | u64 *cd_type_cmd_tso_mss, u32 *cd_tunneling) | |
2132 | { | |
2133 | u32 cd_cmd, cd_tso_len, cd_mss; | |
dd225bc6 | 2134 | struct ipv6hdr *ipv6h; |
fd0a05ce JB |
2135 | struct tcphdr *tcph; |
2136 | struct iphdr *iph; | |
2137 | u32 l4len; | |
2138 | int err; | |
fd0a05ce JB |
2139 | |
2140 | if (!skb_is_gso(skb)) | |
2141 | return 0; | |
2142 | ||
dd225bc6 FR |
2143 | err = skb_cow_head(skb, 0); |
2144 | if (err < 0) | |
2145 | return err; | |
fd0a05ce | 2146 | |
df23075f AS |
2147 | iph = skb->encapsulation ? inner_ip_hdr(skb) : ip_hdr(skb); |
2148 | ipv6h = skb->encapsulation ? inner_ipv6_hdr(skb) : ipv6_hdr(skb); | |
2149 | ||
2150 | if (iph->version == 4) { | |
fd0a05ce JB |
2151 | tcph = skb->encapsulation ? inner_tcp_hdr(skb) : tcp_hdr(skb); |
2152 | iph->tot_len = 0; | |
2153 | iph->check = 0; | |
2154 | tcph->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr, | |
2155 | 0, IPPROTO_TCP, 0); | |
df23075f | 2156 | } else if (ipv6h->version == 6) { |
fd0a05ce JB |
2157 | tcph = skb->encapsulation ? inner_tcp_hdr(skb) : tcp_hdr(skb); |
2158 | ipv6h->payload_len = 0; | |
2159 | tcph->check = ~csum_ipv6_magic(&ipv6h->saddr, &ipv6h->daddr, | |
2160 | 0, IPPROTO_TCP, 0); | |
2161 | } | |
2162 | ||
2163 | l4len = skb->encapsulation ? inner_tcp_hdrlen(skb) : tcp_hdrlen(skb); | |
2164 | *hdr_len = (skb->encapsulation | |
2165 | ? (skb_inner_transport_header(skb) - skb->data) | |
2166 | : skb_transport_offset(skb)) + l4len; | |
2167 | ||
2168 | /* find the field values */ | |
2169 | cd_cmd = I40E_TX_CTX_DESC_TSO; | |
2170 | cd_tso_len = skb->len - *hdr_len; | |
2171 | cd_mss = skb_shinfo(skb)->gso_size; | |
829af3ac MW |
2172 | *cd_type_cmd_tso_mss |= ((u64)cd_cmd << I40E_TXD_CTX_QW1_CMD_SHIFT) | |
2173 | ((u64)cd_tso_len << | |
2174 | I40E_TXD_CTX_QW1_TSO_LEN_SHIFT) | | |
2175 | ((u64)cd_mss << I40E_TXD_CTX_QW1_MSS_SHIFT); | |
fd0a05ce JB |
2176 | return 1; |
2177 | } | |
2178 | ||
beb0dff1 JK |
2179 | /** |
2180 | * i40e_tsyn - set up the tsyn context descriptor | |
2181 | * @tx_ring: ptr to the ring to send | |
2182 | * @skb: ptr to the skb we're sending | |
2183 | * @tx_flags: the collected send information | |
2184 | * | |
2185 | * Returns 0 if no Tx timestamp can happen and 1 if the timestamp will happen | |
2186 | **/ | |
2187 | static int i40e_tsyn(struct i40e_ring *tx_ring, struct sk_buff *skb, | |
2188 | u32 tx_flags, u64 *cd_type_cmd_tso_mss) | |
2189 | { | |
2190 | struct i40e_pf *pf; | |
2191 | ||
2192 | if (likely(!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))) | |
2193 | return 0; | |
2194 | ||
2195 | /* Tx timestamps cannot be sampled when doing TSO */ | |
2196 | if (tx_flags & I40E_TX_FLAGS_TSO) | |
2197 | return 0; | |
2198 | ||
2199 | /* only timestamp the outbound packet if the user has requested it and | |
2200 | * we are not already transmitting a packet to be timestamped | |
2201 | */ | |
2202 | pf = i40e_netdev_to_pf(tx_ring->netdev); | |
22b4777d JK |
2203 | if (!(pf->flags & I40E_FLAG_PTP)) |
2204 | return 0; | |
2205 | ||
9ce34f02 JK |
2206 | if (pf->ptp_tx && |
2207 | !test_and_set_bit_lock(__I40E_PTP_TX_IN_PROGRESS, &pf->state)) { | |
beb0dff1 JK |
2208 | skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS; |
2209 | pf->ptp_tx_skb = skb_get(skb); | |
2210 | } else { | |
2211 | return 0; | |
2212 | } | |
2213 | ||
2214 | *cd_type_cmd_tso_mss |= (u64)I40E_TX_CTX_DESC_TSYN << | |
2215 | I40E_TXD_CTX_QW1_CMD_SHIFT; | |
2216 | ||
beb0dff1 JK |
2217 | return 1; |
2218 | } | |
2219 | ||
fd0a05ce JB |
2220 | /** |
2221 | * i40e_tx_enable_csum - Enable Tx checksum offloads | |
2222 | * @skb: send buffer | |
2223 | * @tx_flags: Tx flags currently set | |
2224 | * @td_cmd: Tx descriptor command bits to set | |
2225 | * @td_offset: Tx descriptor header offsets to set | |
2226 | * @cd_tunneling: ptr to context desc bits | |
2227 | **/ | |
2228 | static void i40e_tx_enable_csum(struct sk_buff *skb, u32 tx_flags, | |
2229 | u32 *td_cmd, u32 *td_offset, | |
2230 | struct i40e_ring *tx_ring, | |
2231 | u32 *cd_tunneling) | |
2232 | { | |
2233 | struct ipv6hdr *this_ipv6_hdr; | |
2234 | unsigned int this_tcp_hdrlen; | |
2235 | struct iphdr *this_ip_hdr; | |
2236 | u32 network_hdr_len; | |
2237 | u8 l4_hdr = 0; | |
45991204 | 2238 | u32 l4_tunnel = 0; |
fd0a05ce JB |
2239 | |
2240 | if (skb->encapsulation) { | |
45991204 ASJ |
2241 | switch (ip_hdr(skb)->protocol) { |
2242 | case IPPROTO_UDP: | |
2243 | l4_tunnel = I40E_TXD_CTX_UDP_TUNNELING; | |
2244 | break; | |
2245 | default: | |
2246 | return; | |
2247 | } | |
fd0a05ce JB |
2248 | network_hdr_len = skb_inner_network_header_len(skb); |
2249 | this_ip_hdr = inner_ip_hdr(skb); | |
2250 | this_ipv6_hdr = inner_ipv6_hdr(skb); | |
2251 | this_tcp_hdrlen = inner_tcp_hdrlen(skb); | |
2252 | ||
2253 | if (tx_flags & I40E_TX_FLAGS_IPV4) { | |
2254 | ||
2255 | if (tx_flags & I40E_TX_FLAGS_TSO) { | |
2256 | *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV4; | |
2257 | ip_hdr(skb)->check = 0; | |
2258 | } else { | |
2259 | *cd_tunneling |= | |
2260 | I40E_TX_CTX_EXT_IP_IPV4_NO_CSUM; | |
2261 | } | |
2262 | } else if (tx_flags & I40E_TX_FLAGS_IPV6) { | |
df23075f AS |
2263 | *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6; |
2264 | if (tx_flags & I40E_TX_FLAGS_TSO) | |
fd0a05ce | 2265 | ip_hdr(skb)->check = 0; |
fd0a05ce JB |
2266 | } |
2267 | ||
2268 | /* Now set the ctx descriptor fields */ | |
2269 | *cd_tunneling |= (skb_network_header_len(skb) >> 2) << | |
45991204 ASJ |
2270 | I40E_TXD_CTX_QW0_EXT_IPLEN_SHIFT | |
2271 | l4_tunnel | | |
fd0a05ce JB |
2272 | ((skb_inner_network_offset(skb) - |
2273 | skb_transport_offset(skb)) >> 1) << | |
2274 | I40E_TXD_CTX_QW0_NATLEN_SHIFT; | |
df23075f AS |
2275 | if (this_ip_hdr->version == 6) { |
2276 | tx_flags &= ~I40E_TX_FLAGS_IPV4; | |
2277 | tx_flags |= I40E_TX_FLAGS_IPV6; | |
2278 | } | |
fd0a05ce JB |
2279 | } else { |
2280 | network_hdr_len = skb_network_header_len(skb); | |
2281 | this_ip_hdr = ip_hdr(skb); | |
2282 | this_ipv6_hdr = ipv6_hdr(skb); | |
2283 | this_tcp_hdrlen = tcp_hdrlen(skb); | |
2284 | } | |
2285 | ||
2286 | /* Enable IP checksum offloads */ | |
2287 | if (tx_flags & I40E_TX_FLAGS_IPV4) { | |
2288 | l4_hdr = this_ip_hdr->protocol; | |
2289 | /* the stack computes the IP header already, the only time we | |
2290 | * need the hardware to recompute it is in the case of TSO. | |
2291 | */ | |
2292 | if (tx_flags & I40E_TX_FLAGS_TSO) { | |
2293 | *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV4_CSUM; | |
2294 | this_ip_hdr->check = 0; | |
2295 | } else { | |
2296 | *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV4; | |
2297 | } | |
2298 | /* Now set the td_offset for IP header length */ | |
2299 | *td_offset = (network_hdr_len >> 2) << | |
2300 | I40E_TX_DESC_LENGTH_IPLEN_SHIFT; | |
2301 | } else if (tx_flags & I40E_TX_FLAGS_IPV6) { | |
2302 | l4_hdr = this_ipv6_hdr->nexthdr; | |
2303 | *td_cmd |= I40E_TX_DESC_CMD_IIPT_IPV6; | |
2304 | /* Now set the td_offset for IP header length */ | |
2305 | *td_offset = (network_hdr_len >> 2) << | |
2306 | I40E_TX_DESC_LENGTH_IPLEN_SHIFT; | |
2307 | } | |
2308 | /* words in MACLEN + dwords in IPLEN + dwords in L4Len */ | |
2309 | *td_offset |= (skb_network_offset(skb) >> 1) << | |
2310 | I40E_TX_DESC_LENGTH_MACLEN_SHIFT; | |
2311 | ||
2312 | /* Enable L4 checksum offloads */ | |
2313 | switch (l4_hdr) { | |
2314 | case IPPROTO_TCP: | |
2315 | /* enable checksum offloads */ | |
2316 | *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_TCP; | |
2317 | *td_offset |= (this_tcp_hdrlen >> 2) << | |
2318 | I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; | |
2319 | break; | |
2320 | case IPPROTO_SCTP: | |
2321 | /* enable SCTP checksum offload */ | |
2322 | *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_SCTP; | |
2323 | *td_offset |= (sizeof(struct sctphdr) >> 2) << | |
2324 | I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; | |
2325 | break; | |
2326 | case IPPROTO_UDP: | |
2327 | /* enable UDP checksum offload */ | |
2328 | *td_cmd |= I40E_TX_DESC_CMD_L4T_EOFT_UDP; | |
2329 | *td_offset |= (sizeof(struct udphdr) >> 2) << | |
2330 | I40E_TX_DESC_LENGTH_L4_FC_LEN_SHIFT; | |
2331 | break; | |
2332 | default: | |
2333 | break; | |
2334 | } | |
2335 | } | |
2336 | ||
2337 | /** | |
2338 | * i40e_create_tx_ctx Build the Tx context descriptor | |
2339 | * @tx_ring: ring to create the descriptor on | |
2340 | * @cd_type_cmd_tso_mss: Quad Word 1 | |
2341 | * @cd_tunneling: Quad Word 0 - bits 0-31 | |
2342 | * @cd_l2tag2: Quad Word 0 - bits 32-63 | |
2343 | **/ | |
2344 | static void i40e_create_tx_ctx(struct i40e_ring *tx_ring, | |
2345 | const u64 cd_type_cmd_tso_mss, | |
2346 | const u32 cd_tunneling, const u32 cd_l2tag2) | |
2347 | { | |
2348 | struct i40e_tx_context_desc *context_desc; | |
fc4ac67b | 2349 | int i = tx_ring->next_to_use; |
fd0a05ce | 2350 | |
ff40dd5d JB |
2351 | if ((cd_type_cmd_tso_mss == I40E_TX_DESC_DTYPE_CONTEXT) && |
2352 | !cd_tunneling && !cd_l2tag2) | |
fd0a05ce JB |
2353 | return; |
2354 | ||
2355 | /* grab the next descriptor */ | |
fc4ac67b AD |
2356 | context_desc = I40E_TX_CTXTDESC(tx_ring, i); |
2357 | ||
2358 | i++; | |
2359 | tx_ring->next_to_use = (i < tx_ring->count) ? i : 0; | |
fd0a05ce JB |
2360 | |
2361 | /* cpu_to_le32 and assign to struct fields */ | |
2362 | context_desc->tunneling_params = cpu_to_le32(cd_tunneling); | |
2363 | context_desc->l2tag2 = cpu_to_le16(cd_l2tag2); | |
3efbbb20 | 2364 | context_desc->rsvd = cpu_to_le16(0); |
fd0a05ce JB |
2365 | context_desc->type_cmd_tso_mss = cpu_to_le64(cd_type_cmd_tso_mss); |
2366 | } | |
2367 | ||
4567dc10 ED |
2368 | /** |
2369 | * __i40e_maybe_stop_tx - 2nd level check for tx stop conditions | |
2370 | * @tx_ring: the ring to be checked | |
2371 | * @size: the size buffer we want to assure is available | |
2372 | * | |
2373 | * Returns -EBUSY if a stop is needed, else 0 | |
2374 | **/ | |
2375 | static inline int __i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size) | |
2376 | { | |
2377 | netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index); | |
2378 | /* Memory barrier before checking head and tail */ | |
2379 | smp_mb(); | |
2380 | ||
2381 | /* Check again in a case another CPU has just made room available. */ | |
2382 | if (likely(I40E_DESC_UNUSED(tx_ring) < size)) | |
2383 | return -EBUSY; | |
2384 | ||
2385 | /* A reprieve! - use start_queue because it doesn't call schedule */ | |
2386 | netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index); | |
2387 | ++tx_ring->tx_stats.restart_queue; | |
2388 | return 0; | |
2389 | } | |
2390 | ||
2391 | /** | |
2392 | * i40e_maybe_stop_tx - 1st level check for tx stop conditions | |
2393 | * @tx_ring: the ring to be checked | |
2394 | * @size: the size buffer we want to assure is available | |
2395 | * | |
2396 | * Returns 0 if stop is not needed | |
2397 | **/ | |
2398 | #ifdef I40E_FCOE | |
2399 | int i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size) | |
2400 | #else | |
2401 | static int i40e_maybe_stop_tx(struct i40e_ring *tx_ring, int size) | |
2402 | #endif | |
2403 | { | |
2404 | if (likely(I40E_DESC_UNUSED(tx_ring) >= size)) | |
2405 | return 0; | |
2406 | return __i40e_maybe_stop_tx(tx_ring, size); | |
2407 | } | |
2408 | ||
71da6197 AS |
2409 | /** |
2410 | * i40e_chk_linearize - Check if there are more than 8 fragments per packet | |
2411 | * @skb: send buffer | |
2412 | * @tx_flags: collected send information | |
2413 | * @hdr_len: size of the packet header | |
2414 | * | |
2415 | * Note: Our HW can't scatter-gather more than 8 fragments to build | |
2416 | * a packet on the wire and so we need to figure out the cases where we | |
2417 | * need to linearize the skb. | |
2418 | **/ | |
2419 | static bool i40e_chk_linearize(struct sk_buff *skb, u32 tx_flags, | |
2420 | const u8 hdr_len) | |
2421 | { | |
2422 | struct skb_frag_struct *frag; | |
2423 | bool linearize = false; | |
2424 | unsigned int size = 0; | |
2425 | u16 num_frags; | |
2426 | u16 gso_segs; | |
2427 | ||
2428 | num_frags = skb_shinfo(skb)->nr_frags; | |
2429 | gso_segs = skb_shinfo(skb)->gso_segs; | |
2430 | ||
2431 | if (tx_flags & (I40E_TX_FLAGS_TSO | I40E_TX_FLAGS_FSO)) { | |
2432 | u16 j = 1; | |
2433 | ||
2434 | if (num_frags < (I40E_MAX_BUFFER_TXD)) | |
2435 | goto linearize_chk_done; | |
2436 | /* try the simple math, if we have too many frags per segment */ | |
2437 | if (DIV_ROUND_UP((num_frags + gso_segs), gso_segs) > | |
2438 | I40E_MAX_BUFFER_TXD) { | |
2439 | linearize = true; | |
2440 | goto linearize_chk_done; | |
2441 | } | |
2442 | frag = &skb_shinfo(skb)->frags[0]; | |
2443 | size = hdr_len; | |
2444 | /* we might still have more fragments per segment */ | |
2445 | do { | |
2446 | size += skb_frag_size(frag); | |
2447 | frag++; j++; | |
2448 | if (j == I40E_MAX_BUFFER_TXD) { | |
2449 | if (size < skb_shinfo(skb)->gso_size) { | |
2450 | linearize = true; | |
2451 | break; | |
2452 | } | |
2453 | j = 1; | |
2454 | size -= skb_shinfo(skb)->gso_size; | |
2455 | if (size) | |
2456 | j++; | |
2457 | size += hdr_len; | |
2458 | } | |
2459 | num_frags--; | |
2460 | } while (num_frags); | |
2461 | } else { | |
2462 | if (num_frags >= I40E_MAX_BUFFER_TXD) | |
2463 | linearize = true; | |
2464 | } | |
2465 | ||
2466 | linearize_chk_done: | |
2467 | return linearize; | |
2468 | } | |
2469 | ||
fd0a05ce JB |
2470 | /** |
2471 | * i40e_tx_map - Build the Tx descriptor | |
2472 | * @tx_ring: ring to send buffer on | |
2473 | * @skb: send buffer | |
2474 | * @first: first buffer info buffer to use | |
2475 | * @tx_flags: collected send information | |
2476 | * @hdr_len: size of the packet header | |
2477 | * @td_cmd: the command field in the descriptor | |
2478 | * @td_offset: offset for checksum or crc | |
2479 | **/ | |
38e00438 VD |
2480 | #ifdef I40E_FCOE |
2481 | void i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb, | |
2482 | struct i40e_tx_buffer *first, u32 tx_flags, | |
2483 | const u8 hdr_len, u32 td_cmd, u32 td_offset) | |
2484 | #else | |
fd0a05ce JB |
2485 | static void i40e_tx_map(struct i40e_ring *tx_ring, struct sk_buff *skb, |
2486 | struct i40e_tx_buffer *first, u32 tx_flags, | |
2487 | const u8 hdr_len, u32 td_cmd, u32 td_offset) | |
38e00438 | 2488 | #endif |
fd0a05ce | 2489 | { |
fd0a05ce JB |
2490 | unsigned int data_len = skb->data_len; |
2491 | unsigned int size = skb_headlen(skb); | |
a5e9c572 | 2492 | struct skb_frag_struct *frag; |
fd0a05ce JB |
2493 | struct i40e_tx_buffer *tx_bi; |
2494 | struct i40e_tx_desc *tx_desc; | |
a5e9c572 | 2495 | u16 i = tx_ring->next_to_use; |
fd0a05ce JB |
2496 | u32 td_tag = 0; |
2497 | dma_addr_t dma; | |
2498 | u16 gso_segs; | |
2499 | ||
fd0a05ce JB |
2500 | if (tx_flags & I40E_TX_FLAGS_HW_VLAN) { |
2501 | td_cmd |= I40E_TX_DESC_CMD_IL2TAG1; | |
2502 | td_tag = (tx_flags & I40E_TX_FLAGS_VLAN_MASK) >> | |
2503 | I40E_TX_FLAGS_VLAN_SHIFT; | |
2504 | } | |
2505 | ||
a5e9c572 AD |
2506 | if (tx_flags & (I40E_TX_FLAGS_TSO | I40E_TX_FLAGS_FSO)) |
2507 | gso_segs = skb_shinfo(skb)->gso_segs; | |
2508 | else | |
2509 | gso_segs = 1; | |
2510 | ||
2511 | /* multiply data chunks by size of headers */ | |
2512 | first->bytecount = skb->len - hdr_len + (gso_segs * hdr_len); | |
2513 | first->gso_segs = gso_segs; | |
2514 | first->skb = skb; | |
2515 | first->tx_flags = tx_flags; | |
2516 | ||
2517 | dma = dma_map_single(tx_ring->dev, skb->data, size, DMA_TO_DEVICE); | |
2518 | ||
fd0a05ce | 2519 | tx_desc = I40E_TX_DESC(tx_ring, i); |
a5e9c572 AD |
2520 | tx_bi = first; |
2521 | ||
2522 | for (frag = &skb_shinfo(skb)->frags[0];; frag++) { | |
2523 | if (dma_mapping_error(tx_ring->dev, dma)) | |
2524 | goto dma_error; | |
2525 | ||
2526 | /* record length, and DMA address */ | |
2527 | dma_unmap_len_set(tx_bi, len, size); | |
2528 | dma_unmap_addr_set(tx_bi, dma, dma); | |
2529 | ||
2530 | tx_desc->buffer_addr = cpu_to_le64(dma); | |
2531 | ||
2532 | while (unlikely(size > I40E_MAX_DATA_PER_TXD)) { | |
fd0a05ce JB |
2533 | tx_desc->cmd_type_offset_bsz = |
2534 | build_ctob(td_cmd, td_offset, | |
2535 | I40E_MAX_DATA_PER_TXD, td_tag); | |
2536 | ||
fd0a05ce JB |
2537 | tx_desc++; |
2538 | i++; | |
2539 | if (i == tx_ring->count) { | |
2540 | tx_desc = I40E_TX_DESC(tx_ring, 0); | |
2541 | i = 0; | |
2542 | } | |
fd0a05ce | 2543 | |
a5e9c572 AD |
2544 | dma += I40E_MAX_DATA_PER_TXD; |
2545 | size -= I40E_MAX_DATA_PER_TXD; | |
fd0a05ce | 2546 | |
a5e9c572 AD |
2547 | tx_desc->buffer_addr = cpu_to_le64(dma); |
2548 | } | |
fd0a05ce JB |
2549 | |
2550 | if (likely(!data_len)) | |
2551 | break; | |
2552 | ||
a5e9c572 AD |
2553 | tx_desc->cmd_type_offset_bsz = build_ctob(td_cmd, td_offset, |
2554 | size, td_tag); | |
fd0a05ce JB |
2555 | |
2556 | tx_desc++; | |
2557 | i++; | |
2558 | if (i == tx_ring->count) { | |
2559 | tx_desc = I40E_TX_DESC(tx_ring, 0); | |
2560 | i = 0; | |
2561 | } | |
2562 | ||
a5e9c572 AD |
2563 | size = skb_frag_size(frag); |
2564 | data_len -= size; | |
fd0a05ce | 2565 | |
a5e9c572 AD |
2566 | dma = skb_frag_dma_map(tx_ring->dev, frag, 0, size, |
2567 | DMA_TO_DEVICE); | |
fd0a05ce | 2568 | |
a5e9c572 AD |
2569 | tx_bi = &tx_ring->tx_bi[i]; |
2570 | } | |
fd0a05ce | 2571 | |
1943d8ba JB |
2572 | /* Place RS bit on last descriptor of any packet that spans across the |
2573 | * 4th descriptor (WB_STRIDE aka 0x3) in a 64B cacheline. | |
2574 | */ | |
1943d8ba JB |
2575 | if (((i & WB_STRIDE) != WB_STRIDE) && |
2576 | (first <= &tx_ring->tx_bi[i]) && | |
2577 | (first >= &tx_ring->tx_bi[i & ~WB_STRIDE])) { | |
2578 | tx_desc->cmd_type_offset_bsz = | |
2579 | build_ctob(td_cmd, td_offset, size, td_tag) | | |
2580 | cpu_to_le64((u64)I40E_TX_DESC_CMD_EOP << | |
2581 | I40E_TXD_QW1_CMD_SHIFT); | |
2582 | } else { | |
2583 | tx_desc->cmd_type_offset_bsz = | |
2584 | build_ctob(td_cmd, td_offset, size, td_tag) | | |
2585 | cpu_to_le64((u64)I40E_TXD_CMD << | |
2586 | I40E_TXD_QW1_CMD_SHIFT); | |
2587 | } | |
fd0a05ce | 2588 | |
7070ce0a AD |
2589 | netdev_tx_sent_queue(netdev_get_tx_queue(tx_ring->netdev, |
2590 | tx_ring->queue_index), | |
2591 | first->bytecount); | |
2592 | ||
a5e9c572 | 2593 | /* set the timestamp */ |
fd0a05ce | 2594 | first->time_stamp = jiffies; |
fd0a05ce JB |
2595 | |
2596 | /* Force memory writes to complete before letting h/w | |
2597 | * know there are new descriptors to fetch. (Only | |
2598 | * applicable for weak-ordered memory model archs, | |
2599 | * such as IA-64). | |
2600 | */ | |
2601 | wmb(); | |
2602 | ||
a5e9c572 AD |
2603 | /* set next_to_watch value indicating a packet is present */ |
2604 | first->next_to_watch = tx_desc; | |
2605 | ||
2606 | i++; | |
2607 | if (i == tx_ring->count) | |
2608 | i = 0; | |
2609 | ||
2610 | tx_ring->next_to_use = i; | |
2611 | ||
4567dc10 | 2612 | i40e_maybe_stop_tx(tx_ring, DESC_NEEDED); |
a5e9c572 | 2613 | /* notify HW of packet */ |
4567dc10 ED |
2614 | if (!skb->xmit_more || |
2615 | netif_xmit_stopped(netdev_get_tx_queue(tx_ring->netdev, | |
2616 | tx_ring->queue_index))) | |
2617 | writel(i, tx_ring->tail); | |
a5e9c572 | 2618 | |
fd0a05ce JB |
2619 | return; |
2620 | ||
2621 | dma_error: | |
a5e9c572 | 2622 | dev_info(tx_ring->dev, "TX DMA map failed\n"); |
fd0a05ce JB |
2623 | |
2624 | /* clear dma mappings for failed tx_bi map */ | |
2625 | for (;;) { | |
2626 | tx_bi = &tx_ring->tx_bi[i]; | |
a5e9c572 | 2627 | i40e_unmap_and_free_tx_resource(tx_ring, tx_bi); |
fd0a05ce JB |
2628 | if (tx_bi == first) |
2629 | break; | |
2630 | if (i == 0) | |
2631 | i = tx_ring->count; | |
2632 | i--; | |
2633 | } | |
2634 | ||
fd0a05ce JB |
2635 | tx_ring->next_to_use = i; |
2636 | } | |
2637 | ||
fd0a05ce JB |
2638 | /** |
2639 | * i40e_xmit_descriptor_count - calculate number of tx descriptors needed | |
2640 | * @skb: send buffer | |
2641 | * @tx_ring: ring to send buffer on | |
2642 | * | |
2643 | * Returns number of data descriptors needed for this skb. Returns 0 to indicate | |
2644 | * there is not enough descriptors available in this ring since we need at least | |
2645 | * one descriptor. | |
2646 | **/ | |
38e00438 VD |
2647 | #ifdef I40E_FCOE |
2648 | int i40e_xmit_descriptor_count(struct sk_buff *skb, | |
2649 | struct i40e_ring *tx_ring) | |
2650 | #else | |
fd0a05ce JB |
2651 | static int i40e_xmit_descriptor_count(struct sk_buff *skb, |
2652 | struct i40e_ring *tx_ring) | |
38e00438 | 2653 | #endif |
fd0a05ce | 2654 | { |
fd0a05ce | 2655 | unsigned int f; |
fd0a05ce JB |
2656 | int count = 0; |
2657 | ||
2658 | /* need: 1 descriptor per page * PAGE_SIZE/I40E_MAX_DATA_PER_TXD, | |
2659 | * + 1 desc for skb_head_len/I40E_MAX_DATA_PER_TXD, | |
be560521 | 2660 | * + 4 desc gap to avoid the cache line where head is, |
fd0a05ce JB |
2661 | * + 1 desc for context descriptor, |
2662 | * otherwise try next time | |
2663 | */ | |
fd0a05ce JB |
2664 | for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) |
2665 | count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size); | |
980093eb | 2666 | |
fd0a05ce | 2667 | count += TXD_USE_COUNT(skb_headlen(skb)); |
be560521 | 2668 | if (i40e_maybe_stop_tx(tx_ring, count + 4 + 1)) { |
fd0a05ce JB |
2669 | tx_ring->tx_stats.tx_busy++; |
2670 | return 0; | |
2671 | } | |
2672 | return count; | |
2673 | } | |
2674 | ||
2675 | /** | |
2676 | * i40e_xmit_frame_ring - Sends buffer on Tx ring | |
2677 | * @skb: send buffer | |
2678 | * @tx_ring: ring to send buffer on | |
2679 | * | |
2680 | * Returns NETDEV_TX_OK if sent, else an error code | |
2681 | **/ | |
2682 | static netdev_tx_t i40e_xmit_frame_ring(struct sk_buff *skb, | |
2683 | struct i40e_ring *tx_ring) | |
2684 | { | |
2685 | u64 cd_type_cmd_tso_mss = I40E_TX_DESC_DTYPE_CONTEXT; | |
2686 | u32 cd_tunneling = 0, cd_l2tag2 = 0; | |
2687 | struct i40e_tx_buffer *first; | |
2688 | u32 td_offset = 0; | |
2689 | u32 tx_flags = 0; | |
2690 | __be16 protocol; | |
2691 | u32 td_cmd = 0; | |
2692 | u8 hdr_len = 0; | |
beb0dff1 | 2693 | int tsyn; |
fd0a05ce JB |
2694 | int tso; |
2695 | if (0 == i40e_xmit_descriptor_count(skb, tx_ring)) | |
2696 | return NETDEV_TX_BUSY; | |
2697 | ||
2698 | /* prepare the xmit flags */ | |
2699 | if (i40e_tx_prepare_vlan_flags(skb, tx_ring, &tx_flags)) | |
2700 | goto out_drop; | |
2701 | ||
2702 | /* obtain protocol of skb */ | |
3d34dd03 | 2703 | protocol = vlan_get_protocol(skb); |
fd0a05ce JB |
2704 | |
2705 | /* record the location of the first descriptor for this packet */ | |
2706 | first = &tx_ring->tx_bi[tx_ring->next_to_use]; | |
2707 | ||
2708 | /* setup IPv4/IPv6 offloads */ | |
0e2fe46c | 2709 | if (protocol == htons(ETH_P_IP)) |
fd0a05ce | 2710 | tx_flags |= I40E_TX_FLAGS_IPV4; |
0e2fe46c | 2711 | else if (protocol == htons(ETH_P_IPV6)) |
fd0a05ce JB |
2712 | tx_flags |= I40E_TX_FLAGS_IPV6; |
2713 | ||
2714 | tso = i40e_tso(tx_ring, skb, tx_flags, protocol, &hdr_len, | |
2715 | &cd_type_cmd_tso_mss, &cd_tunneling); | |
2716 | ||
2717 | if (tso < 0) | |
2718 | goto out_drop; | |
2719 | else if (tso) | |
2720 | tx_flags |= I40E_TX_FLAGS_TSO; | |
2721 | ||
beb0dff1 JK |
2722 | tsyn = i40e_tsyn(tx_ring, skb, tx_flags, &cd_type_cmd_tso_mss); |
2723 | ||
2724 | if (tsyn) | |
2725 | tx_flags |= I40E_TX_FLAGS_TSYN; | |
2726 | ||
71da6197 AS |
2727 | if (i40e_chk_linearize(skb, tx_flags, hdr_len)) |
2728 | if (skb_linearize(skb)) | |
2729 | goto out_drop; | |
2730 | ||
259afec7 JK |
2731 | skb_tx_timestamp(skb); |
2732 | ||
b1941306 AD |
2733 | /* always enable CRC insertion offload */ |
2734 | td_cmd |= I40E_TX_DESC_CMD_ICRC; | |
2735 | ||
fd0a05ce | 2736 | /* Always offload the checksum, since it's in the data descriptor */ |
b1941306 | 2737 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
fd0a05ce JB |
2738 | tx_flags |= I40E_TX_FLAGS_CSUM; |
2739 | ||
fd0a05ce JB |
2740 | i40e_tx_enable_csum(skb, tx_flags, &td_cmd, &td_offset, |
2741 | tx_ring, &cd_tunneling); | |
b1941306 | 2742 | } |
fd0a05ce JB |
2743 | |
2744 | i40e_create_tx_ctx(tx_ring, cd_type_cmd_tso_mss, | |
2745 | cd_tunneling, cd_l2tag2); | |
2746 | ||
2747 | /* Add Flow Director ATR if it's enabled. | |
2748 | * | |
2749 | * NOTE: this must always be directly before the data descriptor. | |
2750 | */ | |
2751 | i40e_atr(tx_ring, skb, tx_flags, protocol); | |
2752 | ||
2753 | i40e_tx_map(tx_ring, skb, first, tx_flags, hdr_len, | |
2754 | td_cmd, td_offset); | |
2755 | ||
fd0a05ce JB |
2756 | return NETDEV_TX_OK; |
2757 | ||
2758 | out_drop: | |
2759 | dev_kfree_skb_any(skb); | |
2760 | return NETDEV_TX_OK; | |
2761 | } | |
2762 | ||
2763 | /** | |
2764 | * i40e_lan_xmit_frame - Selects the correct VSI and Tx queue to send buffer | |
2765 | * @skb: send buffer | |
2766 | * @netdev: network interface device structure | |
2767 | * | |
2768 | * Returns NETDEV_TX_OK if sent, else an error code | |
2769 | **/ | |
2770 | netdev_tx_t i40e_lan_xmit_frame(struct sk_buff *skb, struct net_device *netdev) | |
2771 | { | |
2772 | struct i40e_netdev_priv *np = netdev_priv(netdev); | |
2773 | struct i40e_vsi *vsi = np->vsi; | |
9f65e15b | 2774 | struct i40e_ring *tx_ring = vsi->tx_rings[skb->queue_mapping]; |
fd0a05ce JB |
2775 | |
2776 | /* hardware can't handle really short frames, hardware padding works | |
2777 | * beyond this point | |
2778 | */ | |
a94d9e22 AD |
2779 | if (skb_put_padto(skb, I40E_MIN_TX_LEN)) |
2780 | return NETDEV_TX_OK; | |
fd0a05ce JB |
2781 | |
2782 | return i40e_xmit_frame_ring(skb, tx_ring); | |
2783 | } |