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1// SPDX-License-Identifier: (GPL-2.0 OR MIT)
2/*
3 * Copyright (c) 2018 Synopsys, Inc. and/or its affiliates.
4 * stmmac XGMAC support.
5 */
6
7#include <linux/stmmac.h>
8#include "common.h"
9#include "dwxgmac2.h"
10
11static int dwxgmac2_get_tx_status(struct stmmac_extra_stats *x,
12 struct dma_desc *p, void __iomem *ioaddr)
13{
14 unsigned int tdes3 = le32_to_cpu(p->des3);
15 int ret = tx_done;
16
17 if (unlikely(tdes3 & XGMAC_TDES3_OWN))
18 return tx_dma_own;
19 if (likely(!(tdes3 & XGMAC_TDES3_LD)))
20 return tx_not_ls;
21
22 return ret;
23}
24
25static int dwxgmac2_get_rx_status(struct stmmac_extra_stats *x,
26 struct dma_desc *p)
27{
28 unsigned int rdes3 = le32_to_cpu(p->des3);
29
30 if (unlikely(rdes3 & XGMAC_RDES3_OWN))
31 return dma_own;
32 if (unlikely(rdes3 & XGMAC_RDES3_CTXT))
33 return discard_frame;
34 if (likely(!(rdes3 & XGMAC_RDES3_LD)))
35 return rx_not_ls;
36 if (unlikely((rdes3 & XGMAC_RDES3_ES) && (rdes3 & XGMAC_RDES3_LD)))
37 return discard_frame;
38
39 return good_frame;
40}
41
42static int dwxgmac2_get_tx_len(struct dma_desc *p)
43{
44 return (le32_to_cpu(p->des2) & XGMAC_TDES2_B1L);
45}
46
47static int dwxgmac2_get_tx_owner(struct dma_desc *p)
48{
49 return (le32_to_cpu(p->des3) & XGMAC_TDES3_OWN) > 0;
50}
51
52static void dwxgmac2_set_tx_owner(struct dma_desc *p)
53{
54 p->des3 |= cpu_to_le32(XGMAC_TDES3_OWN);
55}
56
57static void dwxgmac2_set_rx_owner(struct dma_desc *p, int disable_rx_ic)
58{
59 u32 flags = XGMAC_RDES3_OWN;
60
61 if (!disable_rx_ic)
62 flags |= XGMAC_RDES3_IOC;
63
64 p->des3 |= cpu_to_le32(flags);
65}
66
67static int dwxgmac2_get_tx_ls(struct dma_desc *p)
68{
69 return (le32_to_cpu(p->des3) & XGMAC_RDES3_LD) > 0;
70}
71
72static int dwxgmac2_get_rx_frame_len(struct dma_desc *p, int rx_coe)
73{
74 return (le32_to_cpu(p->des3) & XGMAC_RDES3_PL);
75}
76
77static void dwxgmac2_enable_tx_timestamp(struct dma_desc *p)
78{
79 p->des2 |= cpu_to_le32(XGMAC_TDES2_TTSE);
80}
81
82static int dwxgmac2_get_tx_timestamp_status(struct dma_desc *p)
83{
84 return 0; /* Not supported */
85}
86
87static inline void dwxgmac2_get_timestamp(void *desc, u32 ats, u64 *ts)
88{
89 struct dma_desc *p = (struct dma_desc *)desc;
90 u64 ns = 0;
91
92 ns += le32_to_cpu(p->des1) * 1000000000ULL;
93 ns += le32_to_cpu(p->des0);
94
95 *ts = ns;
96}
97
98static int dwxgmac2_rx_check_timestamp(void *desc)
99{
100 struct dma_desc *p = (struct dma_desc *)desc;
101 unsigned int rdes3 = le32_to_cpu(p->des3);
102 bool desc_valid, ts_valid;
103
104 dma_rmb();
105
106 desc_valid = !(rdes3 & XGMAC_RDES3_OWN) && (rdes3 & XGMAC_RDES3_CTXT);
107 ts_valid = !(rdes3 & XGMAC_RDES3_TSD) && (rdes3 & XGMAC_RDES3_TSA);
108
109 if (likely(desc_valid && ts_valid)) {
110 if ((p->des0 == 0xffffffff) && (p->des1 == 0xffffffff))
111 return -EINVAL;
112 return 0;
113 }
114
115 return -EINVAL;
116}
117
118static int dwxgmac2_get_rx_timestamp_status(void *desc, void *next_desc,
119 u32 ats)
120{
121 struct dma_desc *p = (struct dma_desc *)desc;
122 unsigned int rdes3 = le32_to_cpu(p->des3);
123 int ret = -EBUSY;
124
125 if (likely(rdes3 & XGMAC_RDES3_CDA))
126 ret = dwxgmac2_rx_check_timestamp(next_desc);
127
128 return !ret;
129}
130
131static void dwxgmac2_init_rx_desc(struct dma_desc *p, int disable_rx_ic,
132 int mode, int end, int bfsize)
133{
134 dwxgmac2_set_rx_owner(p, disable_rx_ic);
135}
136
137static void dwxgmac2_init_tx_desc(struct dma_desc *p, int mode, int end)
138{
139 p->des0 = 0;
140 p->des1 = 0;
141 p->des2 = 0;
142 p->des3 = 0;
143}
144
145static void dwxgmac2_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
146 bool csum_flag, int mode, bool tx_own,
147 bool ls, unsigned int tot_pkt_len)
148{
149 unsigned int tdes3 = le32_to_cpu(p->des3);
150
151 p->des2 |= cpu_to_le32(len & XGMAC_TDES2_B1L);
152
153 tdes3 |= tot_pkt_len & XGMAC_TDES3_FL;
154 if (is_fs)
155 tdes3 |= XGMAC_TDES3_FD;
156 else
157 tdes3 &= ~XGMAC_TDES3_FD;
158
159 if (csum_flag)
160 tdes3 |= 0x3 << XGMAC_TDES3_CIC_SHIFT;
161 else
162 tdes3 &= ~XGMAC_TDES3_CIC;
163
164 if (ls)
165 tdes3 |= XGMAC_TDES3_LD;
166 else
167 tdes3 &= ~XGMAC_TDES3_LD;
168
169 /* Finally set the OWN bit. Later the DMA will start! */
170 if (tx_own)
171 tdes3 |= XGMAC_TDES3_OWN;
172
173 if (is_fs && tx_own)
174 /* When the own bit, for the first frame, has to be set, all
175 * descriptors for the same frame has to be set before, to
176 * avoid race condition.
177 */
178 dma_wmb();
179
180 p->des3 = cpu_to_le32(tdes3);
181}
182
183static void dwxgmac2_prepare_tso_tx_desc(struct dma_desc *p, int is_fs,
184 int len1, int len2, bool tx_own,
185 bool ls, unsigned int tcphdrlen,
186 unsigned int tcppayloadlen)
187{
188 unsigned int tdes3 = le32_to_cpu(p->des3);
189
190 if (len1)
191 p->des2 |= cpu_to_le32(len1 & XGMAC_TDES2_B1L);
192 if (len2)
193 p->des2 |= cpu_to_le32((len2 << XGMAC_TDES2_B2L_SHIFT) &
194 XGMAC_TDES2_B2L);
195 if (is_fs) {
196 tdes3 |= XGMAC_TDES3_FD | XGMAC_TDES3_TSE;
197 tdes3 |= (tcphdrlen << XGMAC_TDES3_THL_SHIFT) &
198 XGMAC_TDES3_THL;
199 tdes3 |= tcppayloadlen & XGMAC_TDES3_TPL;
200 } else {
201 tdes3 &= ~XGMAC_TDES3_FD;
202 }
203
204 if (ls)
205 tdes3 |= XGMAC_TDES3_LD;
206 else
207 tdes3 &= ~XGMAC_TDES3_LD;
208
209 /* Finally set the OWN bit. Later the DMA will start! */
210 if (tx_own)
211 tdes3 |= XGMAC_TDES3_OWN;
212
213 if (is_fs && tx_own)
214 /* When the own bit, for the first frame, has to be set, all
215 * descriptors for the same frame has to be set before, to
216 * avoid race condition.
217 */
218 dma_wmb();
219
220 p->des3 = cpu_to_le32(tdes3);
221}
222
223static void dwxgmac2_release_tx_desc(struct dma_desc *p, int mode)
224{
225 p->des0 = 0;
226 p->des1 = 0;
227 p->des2 = 0;
228 p->des3 = 0;
229}
230
231static void dwxgmac2_set_tx_ic(struct dma_desc *p)
232{
233 p->des2 |= cpu_to_le32(XGMAC_TDES2_IOC);
234}
235
236static void dwxgmac2_set_mss(struct dma_desc *p, unsigned int mss)
237{
238 p->des0 = 0;
239 p->des1 = 0;
240 p->des2 = cpu_to_le32(mss);
241 p->des3 = cpu_to_le32(XGMAC_TDES3_CTXT | XGMAC_TDES3_TCMSSV);
242}
243
244static void dwxgmac2_set_addr(struct dma_desc *p, dma_addr_t addr)
245{
246 p->des0 = cpu_to_le32(lower_32_bits(addr));
247 p->des1 = cpu_to_le32(upper_32_bits(addr));
248}
249
250static void dwxgmac2_clear(struct dma_desc *p)
251{
252 p->des0 = 0;
253 p->des1 = 0;
254 p->des2 = 0;
255 p->des3 = 0;
256}
257
258static int dwxgmac2_get_rx_hash(struct dma_desc *p, u32 *hash,
259 enum pkt_hash_types *type)
260{
261 unsigned int rdes3 = le32_to_cpu(p->des3);
262 u32 ptype;
263
264 if (rdes3 & XGMAC_RDES3_RSV) {
265 ptype = (rdes3 & XGMAC_RDES3_L34T) >> XGMAC_RDES3_L34T_SHIFT;
266
267 switch (ptype) {
268 case XGMAC_L34T_IP4TCP:
269 case XGMAC_L34T_IP4UDP:
270 case XGMAC_L34T_IP6TCP:
271 case XGMAC_L34T_IP6UDP:
272 *type = PKT_HASH_TYPE_L4;
273 break;
274 default:
275 *type = PKT_HASH_TYPE_L3;
276 break;
277 }
278
279 *hash = le32_to_cpu(p->des1);
280 return 0;
281 }
282
283 return -EINVAL;
284}
285
286static void dwxgmac2_get_rx_header_len(struct dma_desc *p, unsigned int *len)
287{
288 if (le32_to_cpu(p->des3) & XGMAC_RDES3_L34T)
289 *len = le32_to_cpu(p->des2) & XGMAC_RDES2_HL;
290}
291
292static void dwxgmac2_set_sec_addr(struct dma_desc *p, dma_addr_t addr, bool is_valid)
293{
294 p->des2 = cpu_to_le32(lower_32_bits(addr));
295 p->des3 = cpu_to_le32(upper_32_bits(addr));
296}
297
298static void dwxgmac2_set_sarc(struct dma_desc *p, u32 sarc_type)
299{
300 sarc_type <<= XGMAC_TDES3_SAIC_SHIFT;
301
302 p->des3 |= cpu_to_le32(sarc_type & XGMAC_TDES3_SAIC);
303}
304
305static void dwxgmac2_set_vlan_tag(struct dma_desc *p, u16 tag, u16 inner_tag,
306 u32 inner_type)
307{
308 p->des0 = 0;
309 p->des1 = 0;
310 p->des2 = 0;
311 p->des3 = 0;
312
313 /* Inner VLAN */
314 if (inner_type) {
315 u32 des = inner_tag << XGMAC_TDES2_IVT_SHIFT;
316
317 des &= XGMAC_TDES2_IVT;
318 p->des2 = cpu_to_le32(des);
319
320 des = inner_type << XGMAC_TDES3_IVTIR_SHIFT;
321 des &= XGMAC_TDES3_IVTIR;
322 p->des3 = cpu_to_le32(des | XGMAC_TDES3_IVLTV);
323 }
324
325 /* Outer VLAN */
326 p->des3 |= cpu_to_le32(tag & XGMAC_TDES3_VT);
327 p->des3 |= cpu_to_le32(XGMAC_TDES3_VLTV);
328
329 p->des3 |= cpu_to_le32(XGMAC_TDES3_CTXT);
330}
331
332static void dwxgmac2_set_vlan(struct dma_desc *p, u32 type)
333{
334 type <<= XGMAC_TDES2_VTIR_SHIFT;
335 p->des2 |= cpu_to_le32(type & XGMAC_TDES2_VTIR);
336}
337
338static void dwxgmac2_set_tbs(struct dma_edesc *p, u32 sec, u32 nsec)
339{
340 p->des4 = cpu_to_le32((sec & XGMAC_TDES0_LT) | XGMAC_TDES0_LTV);
341 p->des5 = cpu_to_le32(nsec & XGMAC_TDES1_LT);
342 p->des6 = 0;
343 p->des7 = 0;
344}
345
346const struct stmmac_desc_ops dwxgmac210_desc_ops = {
347 .tx_status = dwxgmac2_get_tx_status,
348 .rx_status = dwxgmac2_get_rx_status,
349 .get_tx_len = dwxgmac2_get_tx_len,
350 .get_tx_owner = dwxgmac2_get_tx_owner,
351 .set_tx_owner = dwxgmac2_set_tx_owner,
352 .set_rx_owner = dwxgmac2_set_rx_owner,
353 .get_tx_ls = dwxgmac2_get_tx_ls,
354 .get_rx_frame_len = dwxgmac2_get_rx_frame_len,
355 .enable_tx_timestamp = dwxgmac2_enable_tx_timestamp,
356 .get_tx_timestamp_status = dwxgmac2_get_tx_timestamp_status,
357 .get_rx_timestamp_status = dwxgmac2_get_rx_timestamp_status,
358 .get_timestamp = dwxgmac2_get_timestamp,
359 .set_tx_ic = dwxgmac2_set_tx_ic,
360 .prepare_tx_desc = dwxgmac2_prepare_tx_desc,
361 .prepare_tso_tx_desc = dwxgmac2_prepare_tso_tx_desc,
362 .release_tx_desc = dwxgmac2_release_tx_desc,
363 .init_rx_desc = dwxgmac2_init_rx_desc,
364 .init_tx_desc = dwxgmac2_init_tx_desc,
365 .set_mss = dwxgmac2_set_mss,
366 .set_addr = dwxgmac2_set_addr,
367 .clear = dwxgmac2_clear,
368 .get_rx_hash = dwxgmac2_get_rx_hash,
369 .get_rx_header_len = dwxgmac2_get_rx_header_len,
370 .set_sec_addr = dwxgmac2_set_sec_addr,
371 .set_sarc = dwxgmac2_set_sarc,
372 .set_vlan_tag = dwxgmac2_set_vlan_tag,
373 .set_vlan = dwxgmac2_set_vlan,
374 .set_tbs = dwxgmac2_set_tbs,
375};