1
2
3
4
5
6
7#include <linux/stmmac.h>
8#include "common.h"
9#include "dwxgmac2.h"
10
11static int dwxgmac2_get_tx_status(void *data, 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(void *data, 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 p->des3 |= cpu_to_le32(XGMAC_RDES3_OWN);
60
61 if (!disable_rx_ic)
62 p->des3 |= cpu_to_le32(XGMAC_RDES3_IOC);
63}
64
65static int dwxgmac2_get_tx_ls(struct dma_desc *p)
66{
67 return (le32_to_cpu(p->des3) & XGMAC_RDES3_LD) > 0;
68}
69
70static int dwxgmac2_get_rx_frame_len(struct dma_desc *p, int rx_coe)
71{
72 return (le32_to_cpu(p->des3) & XGMAC_RDES3_PL);
73}
74
75static void dwxgmac2_enable_tx_timestamp(struct dma_desc *p)
76{
77 p->des2 |= cpu_to_le32(XGMAC_TDES2_TTSE);
78}
79
80static int dwxgmac2_get_tx_timestamp_status(struct dma_desc *p)
81{
82 return 0;
83}
84
85static inline void dwxgmac2_get_timestamp(void *desc, u32 ats, u64 *ts)
86{
87 struct dma_desc *p = (struct dma_desc *)desc;
88 u64 ns = 0;
89
90 ns += le32_to_cpu(p->des1) * 1000000000ULL;
91 ns += le32_to_cpu(p->des0);
92
93 *ts = ns;
94}
95
96static int dwxgmac2_rx_check_timestamp(void *desc)
97{
98 struct dma_desc *p = (struct dma_desc *)desc;
99 unsigned int rdes3 = le32_to_cpu(p->des3);
100 bool desc_valid, ts_valid;
101
102 dma_rmb();
103
104 desc_valid = !(rdes3 & XGMAC_RDES3_OWN) && (rdes3 & XGMAC_RDES3_CTXT);
105 ts_valid = !(rdes3 & XGMAC_RDES3_TSD) && (rdes3 & XGMAC_RDES3_TSA);
106
107 if (likely(desc_valid && ts_valid)) {
108 if ((p->des0 == 0xffffffff) && (p->des1 == 0xffffffff))
109 return -EINVAL;
110 return 0;
111 }
112
113 return -EINVAL;
114}
115
116static int dwxgmac2_get_rx_timestamp_status(void *desc, void *next_desc,
117 u32 ats)
118{
119 struct dma_desc *p = (struct dma_desc *)desc;
120 unsigned int rdes3 = le32_to_cpu(p->des3);
121 int ret = -EBUSY;
122
123 if (likely(rdes3 & XGMAC_RDES3_CDA))
124 ret = dwxgmac2_rx_check_timestamp(next_desc);
125
126 return !ret;
127}
128
129static void dwxgmac2_init_rx_desc(struct dma_desc *p, int disable_rx_ic,
130 int mode, int end, int bfsize)
131{
132 dwxgmac2_set_rx_owner(p, disable_rx_ic);
133}
134
135static void dwxgmac2_init_tx_desc(struct dma_desc *p, int mode, int end)
136{
137 p->des0 = 0;
138 p->des1 = 0;
139 p->des2 = 0;
140 p->des3 = 0;
141}
142
143static void dwxgmac2_prepare_tx_desc(struct dma_desc *p, int is_fs, int len,
144 bool csum_flag, int mode, bool tx_own,
145 bool ls, unsigned int tot_pkt_len)
146{
147 unsigned int tdes3 = le32_to_cpu(p->des3);
148
149 p->des2 |= cpu_to_le32(len & XGMAC_TDES2_B1L);
150
151 tdes3 |= tot_pkt_len & XGMAC_TDES3_FL;
152 if (is_fs)
153 tdes3 |= XGMAC_TDES3_FD;
154 else
155 tdes3 &= ~XGMAC_TDES3_FD;
156
157 if (csum_flag)
158 tdes3 |= 0x3 << XGMAC_TDES3_CIC_SHIFT;
159 else
160 tdes3 &= ~XGMAC_TDES3_CIC;
161
162 if (ls)
163 tdes3 |= XGMAC_TDES3_LD;
164 else
165 tdes3 &= ~XGMAC_TDES3_LD;
166
167
168 if (tx_own)
169 tdes3 |= XGMAC_TDES3_OWN;
170
171 if (is_fs && tx_own)
172
173
174
175
176 dma_wmb();
177
178 p->des3 = cpu_to_le32(tdes3);
179}
180
181static void dwxgmac2_prepare_tso_tx_desc(struct dma_desc *p, int is_fs,
182 int len1, int len2, bool tx_own,
183 bool ls, unsigned int tcphdrlen,
184 unsigned int tcppayloadlen)
185{
186 unsigned int tdes3 = le32_to_cpu(p->des3);
187
188 if (len1)
189 p->des2 |= cpu_to_le32(len1 & XGMAC_TDES2_B1L);
190 if (len2)
191 p->des2 |= cpu_to_le32((len2 << XGMAC_TDES2_B2L_SHIFT) &
192 XGMAC_TDES2_B2L);
193 if (is_fs) {
194 tdes3 |= XGMAC_TDES3_FD | XGMAC_TDES3_TSE;
195 tdes3 |= (tcphdrlen << XGMAC_TDES3_THL_SHIFT) &
196 XGMAC_TDES3_THL;
197 tdes3 |= tcppayloadlen & XGMAC_TDES3_TPL;
198 } else {
199 tdes3 &= ~XGMAC_TDES3_FD;
200 }
201
202 if (ls)
203 tdes3 |= XGMAC_TDES3_LD;
204 else
205 tdes3 &= ~XGMAC_TDES3_LD;
206
207
208 if (tx_own)
209 tdes3 |= XGMAC_TDES3_OWN;
210
211 if (is_fs && tx_own)
212
213
214
215
216 dma_wmb();
217
218 p->des3 = cpu_to_le32(tdes3);
219}
220
221static void dwxgmac2_release_tx_desc(struct dma_desc *p, int mode)
222{
223 p->des0 = 0;
224 p->des1 = 0;
225 p->des2 = 0;
226 p->des3 = 0;
227}
228
229static void dwxgmac2_set_tx_ic(struct dma_desc *p)
230{
231 p->des2 |= cpu_to_le32(XGMAC_TDES2_IOC);
232}
233
234static void dwxgmac2_set_mss(struct dma_desc *p, unsigned int mss)
235{
236 p->des0 = 0;
237 p->des1 = 0;
238 p->des2 = cpu_to_le32(mss);
239 p->des3 = cpu_to_le32(XGMAC_TDES3_CTXT | XGMAC_TDES3_TCMSSV);
240}
241
242static void dwxgmac2_get_addr(struct dma_desc *p, unsigned int *addr)
243{
244 *addr = le32_to_cpu(p->des0);
245}
246
247static void dwxgmac2_set_addr(struct dma_desc *p, dma_addr_t addr)
248{
249 p->des0 = cpu_to_le32(lower_32_bits(addr));
250 p->des1 = cpu_to_le32(upper_32_bits(addr));
251}
252
253static void dwxgmac2_clear(struct dma_desc *p)
254{
255 p->des0 = 0;
256 p->des1 = 0;
257 p->des2 = 0;
258 p->des3 = 0;
259}
260
261static int dwxgmac2_get_rx_hash(struct dma_desc *p, u32 *hash,
262 enum pkt_hash_types *type)
263{
264 unsigned int rdes3 = le32_to_cpu(p->des3);
265 u32 ptype;
266
267 if (rdes3 & XGMAC_RDES3_RSV) {
268 ptype = (rdes3 & XGMAC_RDES3_L34T) >> XGMAC_RDES3_L34T_SHIFT;
269
270 switch (ptype) {
271 case XGMAC_L34T_IP4TCP:
272 case XGMAC_L34T_IP4UDP:
273 case XGMAC_L34T_IP6TCP:
274 case XGMAC_L34T_IP6UDP:
275 *type = PKT_HASH_TYPE_L4;
276 break;
277 default:
278 *type = PKT_HASH_TYPE_L3;
279 break;
280 }
281
282 *hash = le32_to_cpu(p->des1);
283 return 0;
284 }
285
286 return -EINVAL;
287}
288
289static void dwxgmac2_get_rx_header_len(struct dma_desc *p, unsigned int *len)
290{
291 if (le32_to_cpu(p->des3) & XGMAC_RDES3_L34T)
292 *len = le32_to_cpu(p->des2) & XGMAC_RDES2_HL;
293}
294
295static void dwxgmac2_set_sec_addr(struct dma_desc *p, dma_addr_t addr)
296{
297 p->des2 = cpu_to_le32(lower_32_bits(addr));
298 p->des3 = cpu_to_le32(upper_32_bits(addr));
299}
300
301static void dwxgmac2_set_sarc(struct dma_desc *p, u32 sarc_type)
302{
303 sarc_type <<= XGMAC_TDES3_SAIC_SHIFT;
304
305 p->des3 |= cpu_to_le32(sarc_type & XGMAC_TDES3_SAIC);
306}
307
308static void dwxgmac2_set_vlan_tag(struct dma_desc *p, u16 tag, u16 inner_tag,
309 u32 inner_type)
310{
311 p->des0 = 0;
312 p->des1 = 0;
313 p->des2 = 0;
314 p->des3 = 0;
315
316
317 if (inner_type) {
318 u32 des = inner_tag << XGMAC_TDES2_IVT_SHIFT;
319
320 des &= XGMAC_TDES2_IVT;
321 p->des2 = cpu_to_le32(des);
322
323 des = inner_type << XGMAC_TDES3_IVTIR_SHIFT;
324 des &= XGMAC_TDES3_IVTIR;
325 p->des3 = cpu_to_le32(des | XGMAC_TDES3_IVLTV);
326 }
327
328
329 p->des3 |= cpu_to_le32(tag & XGMAC_TDES3_VT);
330 p->des3 |= cpu_to_le32(XGMAC_TDES3_VLTV);
331
332 p->des3 |= cpu_to_le32(XGMAC_TDES3_CTXT);
333}
334
335static void dwxgmac2_set_vlan(struct dma_desc *p, u32 type)
336{
337 type <<= XGMAC_TDES2_VTIR_SHIFT;
338 p->des2 |= cpu_to_le32(type & XGMAC_TDES2_VTIR);
339}
340
341static void dwxgmac2_set_tbs(struct dma_edesc *p, u32 sec, u32 nsec)
342{
343 p->des4 = cpu_to_le32((sec & XGMAC_TDES0_LT) | XGMAC_TDES0_LTV);
344 p->des5 = cpu_to_le32(nsec & XGMAC_TDES1_LT);
345 p->des6 = 0;
346 p->des7 = 0;
347}
348
349const struct stmmac_desc_ops dwxgmac210_desc_ops = {
350 .tx_status = dwxgmac2_get_tx_status,
351 .rx_status = dwxgmac2_get_rx_status,
352 .get_tx_len = dwxgmac2_get_tx_len,
353 .get_tx_owner = dwxgmac2_get_tx_owner,
354 .set_tx_owner = dwxgmac2_set_tx_owner,
355 .set_rx_owner = dwxgmac2_set_rx_owner,
356 .get_tx_ls = dwxgmac2_get_tx_ls,
357 .get_rx_frame_len = dwxgmac2_get_rx_frame_len,
358 .enable_tx_timestamp = dwxgmac2_enable_tx_timestamp,
359 .get_tx_timestamp_status = dwxgmac2_get_tx_timestamp_status,
360 .get_rx_timestamp_status = dwxgmac2_get_rx_timestamp_status,
361 .get_timestamp = dwxgmac2_get_timestamp,
362 .set_tx_ic = dwxgmac2_set_tx_ic,
363 .prepare_tx_desc = dwxgmac2_prepare_tx_desc,
364 .prepare_tso_tx_desc = dwxgmac2_prepare_tso_tx_desc,
365 .release_tx_desc = dwxgmac2_release_tx_desc,
366 .init_rx_desc = dwxgmac2_init_rx_desc,
367 .init_tx_desc = dwxgmac2_init_tx_desc,
368 .set_mss = dwxgmac2_set_mss,
369 .get_addr = dwxgmac2_get_addr,
370 .set_addr = dwxgmac2_set_addr,
371 .clear = dwxgmac2_clear,
372 .get_rx_hash = dwxgmac2_get_rx_hash,
373 .get_rx_header_len = dwxgmac2_get_rx_header_len,
374 .set_sec_addr = dwxgmac2_set_sec_addr,
375 .set_sarc = dwxgmac2_set_sarc,
376 .set_vlan_tag = dwxgmac2_set_vlan_tag,
377 .set_vlan = dwxgmac2_set_vlan,
378 .set_tbs = dwxgmac2_set_tbs,
379};
380
