1 /*******************************************************************************
2 This contains the functions to handle the enhanced descriptors.
4 Copyright (C) 2007-2014 STMicroelectronics Ltd
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.
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
15 The full GNU General Public License is included in this distribution in
16 the file called "COPYING".
18 Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
19 *******************************************************************************/
21 #include <linux/stmmac.h>
23 #include "descs_com.h"
25 static int enh_desc_get_tx_status(void *data, struct stmmac_extra_stats *x,
26 struct dma_desc *p, void __iomem *ioaddr)
28 struct net_device_stats *stats = (struct net_device_stats *)data;
29 unsigned int tdes0 = le32_to_cpu(p->des0);
32 /* Get tx owner first */
33 if (unlikely(tdes0 & ETDES0_OWN))
36 /* Verify tx error by looking at the last segment. */
37 if (likely(!(tdes0 & ETDES0_LAST_SEGMENT)))
40 if (unlikely(tdes0 & ETDES0_ERROR_SUMMARY)) {
41 if (unlikely(tdes0 & ETDES0_JABBER_TIMEOUT))
44 if (unlikely(tdes0 & ETDES0_FRAME_FLUSHED)) {
45 x->tx_frame_flushed++;
46 dwmac_dma_flush_tx_fifo(ioaddr);
49 if (unlikely(tdes0 & ETDES0_LOSS_CARRIER)) {
51 stats->tx_carrier_errors++;
53 if (unlikely(tdes0 & ETDES0_NO_CARRIER)) {
55 stats->tx_carrier_errors++;
57 if (unlikely((tdes0 & ETDES0_LATE_COLLISION) ||
58 (tdes0 & ETDES0_EXCESSIVE_COLLISIONS)))
60 (tdes0 & ETDES0_COLLISION_COUNT_MASK) >> 3;
62 if (unlikely(tdes0 & ETDES0_EXCESSIVE_DEFERRAL))
65 if (unlikely(tdes0 & ETDES0_UNDERFLOW_ERROR)) {
66 dwmac_dma_flush_tx_fifo(ioaddr);
70 if (unlikely(tdes0 & ETDES0_IP_HEADER_ERROR))
71 x->tx_ip_header_error++;
73 if (unlikely(tdes0 & ETDES0_PAYLOAD_ERROR)) {
74 x->tx_payload_error++;
75 dwmac_dma_flush_tx_fifo(ioaddr);
81 if (unlikely(tdes0 & ETDES0_DEFERRED))
84 #ifdef STMMAC_VLAN_TAG_USED
85 if (tdes0 & ETDES0_VLAN_FRAME)
92 static int enh_desc_get_tx_len(struct dma_desc *p)
94 return (le32_to_cpu(p->des1) & ETDES1_BUFFER1_SIZE_MASK);
97 static int enh_desc_coe_rdes0(int ipc_err, int type, int payload_err)
100 u32 status = (type << 2 | ipc_err << 1 | payload_err) & 0x7;
102 /* bits 5 7 0 | Frame status
103 * ----------------------------------------------------------
104 * 0 0 0 | IEEE 802.3 Type frame (length < 1536 octects)
105 * 1 0 0 | IPv4/6 No CSUM errorS.
106 * 1 0 1 | IPv4/6 CSUM PAYLOAD error
107 * 1 1 0 | IPv4/6 CSUM IP HR error
108 * 1 1 1 | IPv4/6 IP PAYLOAD AND HEADER errorS
109 * 0 0 1 | IPv4/6 unsupported IP PAYLOAD
110 * 0 1 1 | COE bypassed.. no IPv4/6 frame
115 else if (status == 0x4)
117 else if (status == 0x5)
119 else if (status == 0x6)
121 else if (status == 0x7)
123 else if (status == 0x1)
125 else if (status == 0x3)
130 static void enh_desc_get_ext_status(void *data, struct stmmac_extra_stats *x,
131 struct dma_extended_desc *p)
133 unsigned int rdes0 = le32_to_cpu(p->basic.des0);
134 unsigned int rdes4 = le32_to_cpu(p->des4);
136 if (unlikely(rdes0 & ERDES0_RX_MAC_ADDR)) {
137 int message_type = (rdes4 & ERDES4_MSG_TYPE_MASK) >> 8;
139 if (rdes4 & ERDES4_IP_HDR_ERR)
141 if (rdes4 & ERDES4_IP_PAYLOAD_ERR)
143 if (rdes4 & ERDES4_IP_CSUM_BYPASSED)
144 x->ip_csum_bypassed++;
145 if (rdes4 & ERDES4_IPV4_PKT_RCVD)
147 if (rdes4 & ERDES4_IPV6_PKT_RCVD)
150 if (message_type == RDES_EXT_NO_PTP)
151 x->no_ptp_rx_msg_type_ext++;
152 else if (message_type == RDES_EXT_SYNC)
153 x->ptp_rx_msg_type_sync++;
154 else if (message_type == RDES_EXT_FOLLOW_UP)
155 x->ptp_rx_msg_type_follow_up++;
156 else if (message_type == RDES_EXT_DELAY_REQ)
157 x->ptp_rx_msg_type_delay_req++;
158 else if (message_type == RDES_EXT_DELAY_RESP)
159 x->ptp_rx_msg_type_delay_resp++;
160 else if (message_type == RDES_EXT_PDELAY_REQ)
161 x->ptp_rx_msg_type_pdelay_req++;
162 else if (message_type == RDES_EXT_PDELAY_RESP)
163 x->ptp_rx_msg_type_pdelay_resp++;
164 else if (message_type == RDES_EXT_PDELAY_FOLLOW_UP)
165 x->ptp_rx_msg_type_pdelay_follow_up++;
166 else if (message_type == RDES_PTP_ANNOUNCE)
167 x->ptp_rx_msg_type_announce++;
168 else if (message_type == RDES_PTP_MANAGEMENT)
169 x->ptp_rx_msg_type_management++;
170 else if (message_type == RDES_PTP_PKT_RESERVED_TYPE)
171 x->ptp_rx_msg_pkt_reserved_type++;
173 if (rdes4 & ERDES4_PTP_FRAME_TYPE)
175 if (rdes4 & ERDES4_PTP_VER)
177 if (rdes4 & ERDES4_TIMESTAMP_DROPPED)
178 x->timestamp_dropped++;
179 if (rdes4 & ERDES4_AV_PKT_RCVD)
181 if (rdes4 & ERDES4_AV_TAGGED_PKT_RCVD)
182 x->av_tagged_pkt_rcvd++;
183 if ((rdes4 & ERDES4_VLAN_TAG_PRI_VAL_MASK) >> 18)
184 x->vlan_tag_priority_val++;
185 if (rdes4 & ERDES4_L3_FILTER_MATCH)
186 x->l3_filter_match++;
187 if (rdes4 & ERDES4_L4_FILTER_MATCH)
188 x->l4_filter_match++;
189 if ((rdes4 & ERDES4_L3_L4_FILT_NO_MATCH_MASK) >> 26)
190 x->l3_l4_filter_no_match++;
194 static int enh_desc_get_rx_status(void *data, struct stmmac_extra_stats *x,
197 struct net_device_stats *stats = (struct net_device_stats *)data;
198 unsigned int rdes0 = le32_to_cpu(p->des0);
199 int ret = good_frame;
201 if (unlikely(rdes0 & RDES0_OWN))
204 if (unlikely(rdes0 & RDES0_ERROR_SUMMARY)) {
205 if (unlikely(rdes0 & RDES0_DESCRIPTOR_ERROR)) {
207 stats->rx_length_errors++;
209 if (unlikely(rdes0 & RDES0_OVERFLOW_ERROR))
210 x->rx_gmac_overflow++;
212 if (unlikely(rdes0 & RDES0_IPC_CSUM_ERROR))
213 pr_err("\tIPC Csum Error/Giant frame\n");
215 if (unlikely(rdes0 & RDES0_COLLISION))
217 if (unlikely(rdes0 & RDES0_RECEIVE_WATCHDOG))
220 if (unlikely(rdes0 & RDES0_MII_ERROR)) /* GMII */
223 if (unlikely(rdes0 & RDES0_CRC_ERROR)) {
225 stats->rx_crc_errors++;
230 /* After a payload csum error, the ES bit is set.
231 * It doesn't match with the information reported into the databook.
232 * At any rate, we need to understand if the CSUM hw computation is ok
233 * and report this info to the upper layers. */
234 ret = enh_desc_coe_rdes0(!!(rdes0 & RDES0_IPC_CSUM_ERROR),
235 !!(rdes0 & RDES0_FRAME_TYPE),
236 !!(rdes0 & ERDES0_RX_MAC_ADDR));
238 if (unlikely(rdes0 & RDES0_DRIBBLING))
241 if (unlikely(rdes0 & RDES0_SA_FILTER_FAIL)) {
242 x->sa_rx_filter_fail++;
245 if (unlikely(rdes0 & RDES0_DA_FILTER_FAIL)) {
246 x->da_rx_filter_fail++;
249 if (unlikely(rdes0 & RDES0_LENGTH_ERROR)) {
253 #ifdef STMMAC_VLAN_TAG_USED
254 if (rdes0 & RDES0_VLAN_TAG)
261 static void enh_desc_init_rx_desc(struct dma_desc *p, int disable_rx_ic,
264 p->des0 |= cpu_to_le32(RDES0_OWN);
265 p->des1 |= cpu_to_le32((BUF_SIZE_8KiB - 1) & ERDES1_BUFFER1_SIZE_MASK);
267 if (mode == STMMAC_CHAIN_MODE)
268 ehn_desc_rx_set_on_chain(p);
270 ehn_desc_rx_set_on_ring(p, end);
273 p->des1 |= cpu_to_le32(ERDES1_DISABLE_IC);
276 static void enh_desc_init_tx_desc(struct dma_desc *p, int mode, int end)
278 p->des0 &= cpu_to_le32(~ETDES0_OWN);
279 if (mode == STMMAC_CHAIN_MODE)
280 enh_desc_end_tx_desc_on_chain(p);
282 enh_desc_end_tx_desc_on_ring(p, end);
285 static int enh_desc_get_tx_owner(struct dma_desc *p)
287 return (le32_to_cpu(p->des0) & ETDES0_OWN) >> 31;
290 static void enh_desc_set_tx_owner(struct dma_desc *p)
292 p->des0 |= cpu_to_le32(ETDES0_OWN);
295 static void enh_desc_set_rx_owner(struct dma_desc *p)
297 p->des0 |= cpu_to_le32(RDES0_OWN);
300 static int enh_desc_get_tx_ls(struct dma_desc *p)
302 return (le32_to_cpu(p->des0) & ETDES0_LAST_SEGMENT) >> 29;
305 static void enh_desc_release_tx_desc(struct dma_desc *p, int mode)
307 int ter = (le32_to_cpu(p->des0) & ETDES0_END_RING) >> 21;
309 memset(p, 0, offsetof(struct dma_desc, des2));
310 if (mode == STMMAC_CHAIN_MODE)
311 enh_desc_end_tx_desc_on_chain(p);
313 enh_desc_end_tx_desc_on_ring(p, ter);
316 static void enh_desc_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
317 bool csum_flag, int mode, bool tx_own,
320 unsigned int tdes0 = le32_to_cpu(p->des0);
322 if (mode == STMMAC_CHAIN_MODE)
323 enh_set_tx_desc_len_on_chain(p, len);
325 enh_set_tx_desc_len_on_ring(p, len);
328 tdes0 |= ETDES0_FIRST_SEGMENT;
330 tdes0 &= ~ETDES0_FIRST_SEGMENT;
332 if (likely(csum_flag))
333 tdes0 |= (TX_CIC_FULL << ETDES0_CHECKSUM_INSERTION_SHIFT);
335 tdes0 &= ~(TX_CIC_FULL << ETDES0_CHECKSUM_INSERTION_SHIFT);
338 tdes0 |= ETDES0_LAST_SEGMENT;
340 /* Finally set the OWN bit. Later the DMA will start! */
345 /* When the own bit, for the first frame, has to be set, all
346 * descriptors for the same frame has to be set before, to
347 * avoid race condition.
351 p->des0 = cpu_to_le32(tdes0);
354 static void enh_desc_set_tx_ic(struct dma_desc *p)
356 p->des0 |= cpu_to_le32(ETDES0_INTERRUPT);
359 static int enh_desc_get_rx_frame_len(struct dma_desc *p, int rx_coe_type)
361 unsigned int csum = 0;
362 /* The type-1 checksum offload engines append the checksum at
363 * the end of frame and the two bytes of checksum are added in
365 * Adjust for that in the framelen for type-1 checksum offload
368 if (rx_coe_type == STMMAC_RX_COE_TYPE1)
371 return (((le32_to_cpu(p->des0) & RDES0_FRAME_LEN_MASK)
372 >> RDES0_FRAME_LEN_SHIFT) - csum);
375 static void enh_desc_enable_tx_timestamp(struct dma_desc *p)
377 p->des0 |= cpu_to_le32(ETDES0_TIME_STAMP_ENABLE);
380 static int enh_desc_get_tx_timestamp_status(struct dma_desc *p)
382 return (le32_to_cpu(p->des0) & ETDES0_TIME_STAMP_STATUS) >> 17;
385 static u64 enh_desc_get_timestamp(void *desc, u32 ats)
390 struct dma_extended_desc *p = (struct dma_extended_desc *)desc;
391 ns = le32_to_cpu(p->des6);
392 /* convert high/sec time stamp value to nanosecond */
393 ns += le32_to_cpu(p->des7) * 1000000000ULL;
395 struct dma_desc *p = (struct dma_desc *)desc;
396 ns = le32_to_cpu(p->des2);
397 ns += le32_to_cpu(p->des3) * 1000000000ULL;
403 static int enh_desc_get_rx_timestamp_status(void *desc, u32 ats)
406 struct dma_extended_desc *p = (struct dma_extended_desc *)desc;
407 return (le32_to_cpu(p->basic.des0) & RDES0_IPC_CSUM_ERROR) >> 7;
409 struct dma_desc *p = (struct dma_desc *)desc;
410 if ((le32_to_cpu(p->des2) == 0xffffffff) &&
411 (le32_to_cpu(p->des3) == 0xffffffff))
412 /* timestamp is corrupted, hence don't store it */
419 static void enh_desc_display_ring(void *head, unsigned int size, bool rx)
421 struct dma_extended_desc *ep = (struct dma_extended_desc *)head;
424 pr_info("Extended %s descriptor ring:\n", rx ? "RX" : "TX");
426 for (i = 0; i < size; i++) {
430 pr_info("%d [0x%x]: 0x%x 0x%x 0x%x 0x%x\n",
431 i, (unsigned int)virt_to_phys(ep),
432 (unsigned int)x, (unsigned int)(x >> 32),
433 ep->basic.des2, ep->basic.des3);
439 const struct stmmac_desc_ops enh_desc_ops = {
440 .tx_status = enh_desc_get_tx_status,
441 .rx_status = enh_desc_get_rx_status,
442 .get_tx_len = enh_desc_get_tx_len,
443 .init_rx_desc = enh_desc_init_rx_desc,
444 .init_tx_desc = enh_desc_init_tx_desc,
445 .get_tx_owner = enh_desc_get_tx_owner,
446 .release_tx_desc = enh_desc_release_tx_desc,
447 .prepare_tx_desc = enh_desc_prepare_tx_desc,
448 .set_tx_ic = enh_desc_set_tx_ic,
449 .get_tx_ls = enh_desc_get_tx_ls,
450 .set_tx_owner = enh_desc_set_tx_owner,
451 .set_rx_owner = enh_desc_set_rx_owner,
452 .get_rx_frame_len = enh_desc_get_rx_frame_len,
453 .rx_extended_status = enh_desc_get_ext_status,
454 .enable_tx_timestamp = enh_desc_enable_tx_timestamp,
455 .get_tx_timestamp_status = enh_desc_get_tx_timestamp_status,
456 .get_timestamp = enh_desc_get_timestamp,
457 .get_rx_timestamp_status = enh_desc_get_rx_timestamp_status,
458 .display_ring = enh_desc_display_ring,