1 // SPDX-License-Identifier: GPL-2.0
2 /* ICSSG Ethernet driver
3 *
4 * Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com
5 */
6
7 #include <linux/iopoll.h>
8 #include <linux/regmap.h>
9 #include <uapi/linux/if_ether.h>
10 #include "icssg_config.h"
11 #include "icssg_prueth.h"
12 #include "icssg_switch_map.h"
13 #include "icssg_mii_rt.h"
14
15 /* TX IPG Values to be set for 100M link speed. These values are
16 * in ocp_clk cycles. So need change if ocp_clk is changed for a specific
17 * h/w design.
18 */
19
20 /* IPG is in core_clk cycles */
21 #define MII_RT_TX_IPG_100M 0x17
22 #define MII_RT_TX_IPG_1G 0xb
23 #define MII_RT_TX_IPG_100M_SR1 0x166
24 #define MII_RT_TX_IPG_1G_SR1 0x1a
25
26 #define ICSSG_QUEUES_MAX 64
27 #define ICSSG_QUEUE_OFFSET 0xd00
28 #define ICSSG_QUEUE_PEEK_OFFSET 0xe00
29 #define ICSSG_QUEUE_CNT_OFFSET 0xe40
30 #define ICSSG_QUEUE_RESET_OFFSET 0xf40
31
32 #define ICSSG_NUM_TX_QUEUES 8
33
34 #define RECYCLE_Q_SLICE0 16
35 #define RECYCLE_Q_SLICE1 17
36
37 #define ICSSG_NUM_OTHER_QUEUES 5 /* port, host and special queues */
38
39 #define PORT_HI_Q_SLICE0 32
40 #define PORT_LO_Q_SLICE0 33
41 #define HOST_HI_Q_SLICE0 34
42 #define HOST_LO_Q_SLICE0 35
43 #define HOST_SPL_Q_SLICE0 40 /* Special Queue */
44
45 #define PORT_HI_Q_SLICE1 36
46 #define PORT_LO_Q_SLICE1 37
47 #define HOST_HI_Q_SLICE1 38
48 #define HOST_LO_Q_SLICE1 39
49 #define HOST_SPL_Q_SLICE1 41 /* Special Queue */
50
51 #define MII_RXCFG_DEFAULT (PRUSS_MII_RT_RXCFG_RX_ENABLE | \
52 PRUSS_MII_RT_RXCFG_RX_DATA_RDY_MODE_DIS | \
53 PRUSS_MII_RT_RXCFG_RX_L2_EN | \
54 PRUSS_MII_RT_RXCFG_RX_L2_EOF_SCLR_DIS)
55
56 #define MII_TXCFG_DEFAULT (PRUSS_MII_RT_TXCFG_TX_ENABLE | \
57 PRUSS_MII_RT_TXCFG_TX_AUTO_PREAMBLE | \
58 PRUSS_MII_RT_TXCFG_TX_32_MODE_EN | \
59 PRUSS_MII_RT_TXCFG_TX_IPG_WIRE_CLK_EN)
60
61 #define ICSSG_CFG_DEFAULT (ICSSG_CFG_TX_L1_EN | \
62 ICSSG_CFG_TX_L2_EN | ICSSG_CFG_RX_L2_G_EN | \
63 ICSSG_CFG_TX_PRU_EN | \
64 ICSSG_CFG_SGMII_MODE)
65
66 #define FDB_GEN_CFG1 0x60
67 #define SMEM_VLAN_OFFSET 8
68 #define SMEM_VLAN_OFFSET_MASK GENMASK(25, 8)
69
70 #define FDB_GEN_CFG2 0x64
71 #define FDB_VLAN_EN BIT(6)
72 #define FDB_HOST_EN BIT(2)
73 #define FDB_PRU1_EN BIT(1)
74 #define FDB_PRU0_EN BIT(0)
75 #define FDB_EN_ALL (FDB_PRU0_EN | FDB_PRU1_EN | \
76 FDB_HOST_EN | FDB_VLAN_EN)
77
78 /**
79 * struct map - ICSSG Queue Map
80 * @queue: Queue number
81 * @pd_addr_start: Packet descriptor queue reserved memory
82 * @flags: Flags
83 * @special: Indicates whether this queue is a special queue or not
84 */
85 struct map {
86 int queue;
87 u32 pd_addr_start;
88 u32 flags;
89 bool special;
90 };
91
92 /* Hardware queue map for ICSSG */
93 static const struct map hwq_map[2][ICSSG_NUM_OTHER_QUEUES] = {
94 {
95 { PORT_HI_Q_SLICE0, PORT_DESC0_HI, 0x200000, 0 },
96 { PORT_LO_Q_SLICE0, PORT_DESC0_LO, 0, 0 },
97 { HOST_HI_Q_SLICE0, HOST_DESC0_HI, 0x200000, 0 },
98 { HOST_LO_Q_SLICE0, HOST_DESC0_LO, 0, 0 },
99 { HOST_SPL_Q_SLICE0, HOST_SPPD0, 0x400000, 1 },
100 },
101 {
102 { PORT_HI_Q_SLICE1, PORT_DESC1_HI, 0xa00000, 0 },
103 { PORT_LO_Q_SLICE1, PORT_DESC1_LO, 0x800000, 0 },
104 { HOST_HI_Q_SLICE1, HOST_DESC1_HI, 0xa00000, 0 },
105 { HOST_LO_Q_SLICE1, HOST_DESC1_LO, 0x800000, 0 },
106 { HOST_SPL_Q_SLICE1, HOST_SPPD1, 0xc00000, 1 },
107 },
108 };
109
icssg_config_mii_init_fw_offload(struct prueth_emac * emac)110 static void icssg_config_mii_init_fw_offload(struct prueth_emac *emac)
111 {
112 struct prueth *prueth = emac->prueth;
113 int mii = prueth_emac_slice(emac);
114 u32 txcfg_reg, pcnt_reg, txcfg;
115 struct regmap *mii_rt;
116
117 mii_rt = prueth->mii_rt;
118
119 txcfg_reg = (mii == ICSS_MII0) ? PRUSS_MII_RT_TXCFG0 :
120 PRUSS_MII_RT_TXCFG1;
121 pcnt_reg = (mii == ICSS_MII0) ? PRUSS_MII_RT_RX_PCNT0 :
122 PRUSS_MII_RT_RX_PCNT1;
123
124 txcfg = PRUSS_MII_RT_TXCFG_TX_ENABLE |
125 PRUSS_MII_RT_TXCFG_TX_AUTO_PREAMBLE |
126 PRUSS_MII_RT_TXCFG_TX_IPG_WIRE_CLK_EN;
127
128 if (emac->phy_if == PHY_INTERFACE_MODE_MII && mii == ICSS_MII1)
129 txcfg |= PRUSS_MII_RT_TXCFG_TX_MUX_SEL;
130 else if (emac->phy_if != PHY_INTERFACE_MODE_MII && mii == ICSS_MII0)
131 txcfg |= PRUSS_MII_RT_TXCFG_TX_MUX_SEL;
132
133 regmap_write(mii_rt, txcfg_reg, txcfg);
134 regmap_write(mii_rt, pcnt_reg, 0x1);
135 }
136
icssg_config_mii_init(struct prueth_emac * emac)137 static void icssg_config_mii_init(struct prueth_emac *emac)
138 {
139 struct prueth *prueth = emac->prueth;
140 int slice = prueth_emac_slice(emac);
141 u32 txcfg, txcfg_reg, pcnt_reg;
142 struct regmap *mii_rt;
143
144 mii_rt = prueth->mii_rt;
145
146 txcfg_reg = (slice == ICSS_MII0) ? PRUSS_MII_RT_TXCFG0 :
147 PRUSS_MII_RT_TXCFG1;
148 pcnt_reg = (slice == ICSS_MII0) ? PRUSS_MII_RT_RX_PCNT0 :
149 PRUSS_MII_RT_RX_PCNT1;
150
151 txcfg = MII_TXCFG_DEFAULT;
152
153 /* In MII mode TX lines swapped inside ICSSG, so TX_MUX_SEL cfg need
154 * to be swapped also comparing to RGMII mode.
155 */
156 if (emac->phy_if == PHY_INTERFACE_MODE_MII && slice == ICSS_MII0)
157 txcfg |= PRUSS_MII_RT_TXCFG_TX_MUX_SEL;
158 else if (emac->phy_if != PHY_INTERFACE_MODE_MII && slice == ICSS_MII1)
159 txcfg |= PRUSS_MII_RT_TXCFG_TX_MUX_SEL;
160
161 regmap_write(mii_rt, txcfg_reg, txcfg);
162 regmap_write(mii_rt, pcnt_reg, 0x1);
163 }
164
icssg_miig_queues_init(struct prueth * prueth,int slice)165 static void icssg_miig_queues_init(struct prueth *prueth, int slice)
166 {
167 struct regmap *miig_rt = prueth->miig_rt;
168 void __iomem *smem = prueth->shram.va;
169 u8 pd[ICSSG_SPECIAL_PD_SIZE];
170 int queue = 0, i, j;
171 u32 *pdword;
172
173 /* reset hwqueues */
174 if (slice)
175 queue = ICSSG_NUM_TX_QUEUES;
176
177 for (i = 0; i < ICSSG_NUM_TX_QUEUES; i++) {
178 regmap_write(miig_rt, ICSSG_QUEUE_RESET_OFFSET, queue);
179 queue++;
180 }
181
182 queue = slice ? RECYCLE_Q_SLICE1 : RECYCLE_Q_SLICE0;
183 regmap_write(miig_rt, ICSSG_QUEUE_RESET_OFFSET, queue);
184
185 for (i = 0; i < ICSSG_NUM_OTHER_QUEUES; i++) {
186 regmap_write(miig_rt, ICSSG_QUEUE_RESET_OFFSET,
187 hwq_map[slice][i].queue);
188 }
189
190 /* initialize packet descriptors in SMEM */
191 /* push pakcet descriptors to hwqueues */
192
193 pdword = (u32 *)pd;
194 for (j = 0; j < ICSSG_NUM_OTHER_QUEUES; j++) {
195 const struct map *mp;
196 int pd_size, num_pds;
197 u32 pdaddr;
198
199 mp = &hwq_map[slice][j];
200 if (mp->special) {
201 pd_size = ICSSG_SPECIAL_PD_SIZE;
202 num_pds = ICSSG_NUM_SPECIAL_PDS;
203 } else {
204 pd_size = ICSSG_NORMAL_PD_SIZE;
205 num_pds = ICSSG_NUM_NORMAL_PDS;
206 }
207
208 for (i = 0; i < num_pds; i++) {
209 memset(pd, 0, pd_size);
210
211 pdword[0] &= ICSSG_FLAG_MASK;
212 pdword[0] |= mp->flags;
213 pdaddr = mp->pd_addr_start + i * pd_size;
214
215 memcpy_toio(smem + pdaddr, pd, pd_size);
216 queue = mp->queue;
217 regmap_write(miig_rt, ICSSG_QUEUE_OFFSET + 4 * queue,
218 pdaddr);
219 }
220 }
221 }
222
icssg_config_ipg(struct prueth_emac * emac)223 void icssg_config_ipg(struct prueth_emac *emac)
224 {
225 struct prueth *prueth = emac->prueth;
226 int slice = prueth_emac_slice(emac);
227 u32 ipg;
228
229 switch (emac->speed) {
230 case SPEED_1000:
231 ipg = emac->is_sr1 ? MII_RT_TX_IPG_1G_SR1 : MII_RT_TX_IPG_1G;
232 break;
233 case SPEED_100:
234 ipg = emac->is_sr1 ? MII_RT_TX_IPG_100M_SR1 : MII_RT_TX_IPG_100M;
235 break;
236 case SPEED_10:
237 /* Firmware hardcodes IPG for SR1.0 */
238 if (emac->is_sr1)
239 return;
240 /* IPG for 10M is same as 100M */
241 ipg = MII_RT_TX_IPG_100M;
242 break;
243 default:
244 /* Other links speeds not supported */
245 netdev_err(emac->ndev, "Unsupported link speed\n");
246 return;
247 }
248
249 icssg_mii_update_ipg(prueth->mii_rt, slice, ipg);
250 }
251 EXPORT_SYMBOL_GPL(icssg_config_ipg);
252
emac_r30_cmd_init(struct prueth_emac * emac)253 static void emac_r30_cmd_init(struct prueth_emac *emac)
254 {
255 struct icssg_r30_cmd __iomem *p;
256 int i;
257
258 p = emac->dram.va + MGR_R30_CMD_OFFSET;
259
260 for (i = 0; i < 4; i++)
261 writel(EMAC_NONE, &p->cmd[i]);
262 }
263
emac_r30_is_done(struct prueth_emac * emac)264 static int emac_r30_is_done(struct prueth_emac *emac)
265 {
266 const struct icssg_r30_cmd __iomem *p;
267 u32 cmd;
268 int i;
269
270 p = emac->dram.va + MGR_R30_CMD_OFFSET;
271
272 for (i = 0; i < 4; i++) {
273 cmd = readl(&p->cmd[i]);
274 if (cmd != EMAC_NONE)
275 return 0;
276 }
277
278 return 1;
279 }
280
prueth_fw_offload_buffer_setup(struct prueth_emac * emac)281 static int prueth_fw_offload_buffer_setup(struct prueth_emac *emac)
282 {
283 struct icssg_buffer_pool_cfg __iomem *bpool_cfg;
284 struct icssg_rxq_ctx __iomem *rxq_ctx;
285 struct prueth *prueth = emac->prueth;
286 int slice = prueth_emac_slice(emac);
287 u32 addr;
288 int i;
289
290 addr = lower_32_bits(prueth->msmcram.pa);
291 if (slice)
292 addr += PRUETH_NUM_BUF_POOLS * PRUETH_EMAC_BUF_POOL_SIZE;
293
294 if (addr % SZ_64K) {
295 dev_warn(prueth->dev, "buffer pool needs to be 64KB aligned\n");
296 return -EINVAL;
297 }
298
299 bpool_cfg = emac->dram.va + BUFFER_POOL_0_ADDR_OFFSET;
300 /* workaround for f/w bug. bpool 0 needs to be initialized */
301 for (i = 0; i < PRUETH_NUM_BUF_POOLS; i++) {
302 writel(addr, &bpool_cfg[i].addr);
303 writel(PRUETH_EMAC_BUF_POOL_SIZE, &bpool_cfg[i].len);
304 addr += PRUETH_EMAC_BUF_POOL_SIZE;
305 }
306
307 if (!slice)
308 addr += PRUETH_NUM_BUF_POOLS * PRUETH_EMAC_BUF_POOL_SIZE;
309 else
310 addr += PRUETH_SW_NUM_BUF_POOLS_HOST * PRUETH_SW_BUF_POOL_SIZE_HOST;
311
312 for (i = PRUETH_NUM_BUF_POOLS;
313 i < 2 * PRUETH_SW_NUM_BUF_POOLS_HOST + PRUETH_NUM_BUF_POOLS;
314 i++) {
315 /* The driver only uses first 4 queues per PRU so only initialize them */
316 if (i % PRUETH_SW_NUM_BUF_POOLS_HOST < PRUETH_SW_NUM_BUF_POOLS_PER_PRU) {
317 writel(addr, &bpool_cfg[i].addr);
318 writel(PRUETH_SW_BUF_POOL_SIZE_HOST, &bpool_cfg[i].len);
319 addr += PRUETH_SW_BUF_POOL_SIZE_HOST;
320 } else {
321 writel(0, &bpool_cfg[i].addr);
322 writel(0, &bpool_cfg[i].len);
323 }
324 }
325
326 if (!slice)
327 addr += PRUETH_SW_NUM_BUF_POOLS_HOST * PRUETH_SW_BUF_POOL_SIZE_HOST;
328 else
329 addr += PRUETH_EMAC_RX_CTX_BUF_SIZE;
330
331 rxq_ctx = emac->dram.va + HOST_RX_Q_PRE_CONTEXT_OFFSET;
332 for (i = 0; i < 3; i++)
333 writel(addr, &rxq_ctx->start[i]);
334
335 addr += PRUETH_EMAC_RX_CTX_BUF_SIZE;
336 writel(addr - SZ_2K, &rxq_ctx->end);
337
338 return 0;
339 }
340
prueth_emac_buffer_setup(struct prueth_emac * emac)341 static int prueth_emac_buffer_setup(struct prueth_emac *emac)
342 {
343 struct icssg_buffer_pool_cfg __iomem *bpool_cfg;
344 struct icssg_rxq_ctx __iomem *rxq_ctx;
345 struct prueth *prueth = emac->prueth;
346 int slice = prueth_emac_slice(emac);
347 u32 addr;
348 int i;
349
350 /* Layout to have 64KB aligned buffer pool
351 * |BPOOL0|BPOOL1|RX_CTX0|RX_CTX1|
352 */
353
354 addr = lower_32_bits(prueth->msmcram.pa);
355 if (slice)
356 addr += PRUETH_NUM_BUF_POOLS * PRUETH_EMAC_BUF_POOL_SIZE;
357
358 if (addr % SZ_64K) {
359 dev_warn(prueth->dev, "buffer pool needs to be 64KB aligned\n");
360 return -EINVAL;
361 }
362
363 bpool_cfg = emac->dram.va + BUFFER_POOL_0_ADDR_OFFSET;
364 /* workaround for f/w bug. bpool 0 needs to be initilalized */
365 writel(addr, &bpool_cfg[0].addr);
366 writel(0, &bpool_cfg[0].len);
367
368 for (i = PRUETH_EMAC_BUF_POOL_START;
369 i < PRUETH_EMAC_BUF_POOL_START + PRUETH_NUM_BUF_POOLS;
370 i++) {
371 writel(addr, &bpool_cfg[i].addr);
372 writel(PRUETH_EMAC_BUF_POOL_SIZE, &bpool_cfg[i].len);
373 addr += PRUETH_EMAC_BUF_POOL_SIZE;
374 }
375
376 if (!slice)
377 addr += PRUETH_NUM_BUF_POOLS * PRUETH_EMAC_BUF_POOL_SIZE;
378 else
379 addr += PRUETH_EMAC_RX_CTX_BUF_SIZE * 2;
380
381 /* Pre-emptible RX buffer queue */
382 rxq_ctx = emac->dram.va + HOST_RX_Q_PRE_CONTEXT_OFFSET;
383 for (i = 0; i < 3; i++)
384 writel(addr, &rxq_ctx->start[i]);
385
386 addr += PRUETH_EMAC_RX_CTX_BUF_SIZE;
387 writel(addr, &rxq_ctx->end);
388
389 /* Express RX buffer queue */
390 rxq_ctx = emac->dram.va + HOST_RX_Q_EXP_CONTEXT_OFFSET;
391 for (i = 0; i < 3; i++)
392 writel(addr, &rxq_ctx->start[i]);
393
394 addr += PRUETH_EMAC_RX_CTX_BUF_SIZE;
395 writel(addr, &rxq_ctx->end);
396
397 return 0;
398 }
399
icssg_init_emac_mode(struct prueth * prueth)400 static void icssg_init_emac_mode(struct prueth *prueth)
401 {
402 /* When the device is configured as a bridge and it is being brought
403 * back to the emac mode, the host mac address has to be set as 0.
404 */
405 u32 addr = prueth->shram.pa + EMAC_ICSSG_SWITCH_DEFAULT_VLAN_TABLE_OFFSET;
406 int i;
407 u8 mac[ETH_ALEN] = { 0 };
408
409 if (prueth->emacs_initialized)
410 return;
411
412 /* Set VLAN TABLE address base */
413 regmap_update_bits(prueth->miig_rt, FDB_GEN_CFG1, SMEM_VLAN_OFFSET_MASK,
414 addr << SMEM_VLAN_OFFSET);
415 /* Set enable VLAN aware mode, and FDBs for all PRUs */
416 regmap_write(prueth->miig_rt, FDB_GEN_CFG2, (FDB_PRU0_EN | FDB_PRU1_EN | FDB_HOST_EN));
417 prueth->vlan_tbl = (struct prueth_vlan_tbl __force *)(prueth->shram.va +
418 EMAC_ICSSG_SWITCH_DEFAULT_VLAN_TABLE_OFFSET);
419 for (i = 0; i < SZ_4K - 1; i++) {
420 prueth->vlan_tbl[i].fid = i;
421 prueth->vlan_tbl[i].fid_c1 = 0;
422 }
423 /* Clear host MAC address */
424 icssg_class_set_host_mac_addr(prueth->miig_rt, mac);
425 }
426
icssg_init_fw_offload_mode(struct prueth * prueth)427 static void icssg_init_fw_offload_mode(struct prueth *prueth)
428 {
429 u32 addr = prueth->shram.pa + EMAC_ICSSG_SWITCH_DEFAULT_VLAN_TABLE_OFFSET;
430 int i;
431
432 if (prueth->emacs_initialized)
433 return;
434
435 /* Set VLAN TABLE address base */
436 regmap_update_bits(prueth->miig_rt, FDB_GEN_CFG1, SMEM_VLAN_OFFSET_MASK,
437 addr << SMEM_VLAN_OFFSET);
438 /* Set enable VLAN aware mode, and FDBs for all PRUs */
439 regmap_write(prueth->miig_rt, FDB_GEN_CFG2, FDB_EN_ALL);
440 prueth->vlan_tbl = (struct prueth_vlan_tbl __force *)(prueth->shram.va +
441 EMAC_ICSSG_SWITCH_DEFAULT_VLAN_TABLE_OFFSET);
442 for (i = 0; i < SZ_4K - 1; i++) {
443 prueth->vlan_tbl[i].fid = i;
444 prueth->vlan_tbl[i].fid_c1 = 0;
445 }
446
447 if (prueth->hw_bridge_dev)
448 icssg_class_set_host_mac_addr(prueth->miig_rt, prueth->hw_bridge_dev->dev_addr);
449 icssg_set_pvid(prueth, prueth->default_vlan, PRUETH_PORT_HOST);
450 }
451
icssg_config(struct prueth * prueth,struct prueth_emac * emac,int slice)452 int icssg_config(struct prueth *prueth, struct prueth_emac *emac, int slice)
453 {
454 void __iomem *config = emac->dram.va + ICSSG_CONFIG_OFFSET;
455 struct icssg_flow_cfg __iomem *flow_cfg;
456 int ret;
457
458 if (prueth->is_switch_mode || prueth->is_hsr_offload_mode)
459 icssg_init_fw_offload_mode(prueth);
460 else
461 icssg_init_emac_mode(prueth);
462
463 memset_io(config, 0, TAS_GATE_MASK_LIST0);
464 icssg_miig_queues_init(prueth, slice);
465
466 emac->speed = SPEED_1000;
467 emac->duplex = DUPLEX_FULL;
468 if (!phy_interface_mode_is_rgmii(emac->phy_if)) {
469 emac->speed = SPEED_100;
470 emac->duplex = DUPLEX_FULL;
471 }
472 regmap_update_bits(prueth->miig_rt, ICSSG_CFG_OFFSET,
473 ICSSG_CFG_DEFAULT, ICSSG_CFG_DEFAULT);
474 icssg_miig_set_interface_mode(prueth->miig_rt, slice, emac->phy_if);
475 if (prueth->is_switch_mode || prueth->is_hsr_offload_mode)
476 icssg_config_mii_init_fw_offload(emac);
477 else
478 icssg_config_mii_init(emac);
479 icssg_config_ipg(emac);
480 icssg_update_rgmii_cfg(prueth->miig_rt, emac);
481
482 /* set GPI mode */
483 pruss_cfg_gpimode(prueth->pruss, prueth->pru_id[slice],
484 PRUSS_GPI_MODE_MII);
485
486 /* enable XFR shift for PRU and RTU */
487 pruss_cfg_xfr_enable(prueth->pruss, PRU_TYPE_PRU, true);
488 pruss_cfg_xfr_enable(prueth->pruss, PRU_TYPE_RTU, true);
489
490 /* set C28 to 0x100 */
491 pru_rproc_set_ctable(prueth->pru[slice], PRU_C28, 0x100 << 8);
492 pru_rproc_set_ctable(prueth->rtu[slice], PRU_C28, 0x100 << 8);
493 pru_rproc_set_ctable(prueth->txpru[slice], PRU_C28, 0x100 << 8);
494
495 flow_cfg = config + PSI_L_REGULAR_FLOW_ID_BASE_OFFSET;
496 writew(emac->rx_flow_id_base, &flow_cfg->rx_base_flow);
497 writew(0, &flow_cfg->mgm_base_flow);
498 writeb(0, config + SPL_PKT_DEFAULT_PRIORITY);
499 writeb(0, config + QUEUE_NUM_UNTAGGED);
500
501 if (prueth->is_switch_mode || prueth->is_hsr_offload_mode)
502 ret = prueth_fw_offload_buffer_setup(emac);
503 else
504 ret = prueth_emac_buffer_setup(emac);
505 if (ret)
506 return ret;
507
508 emac_r30_cmd_init(emac);
509
510 return 0;
511 }
512 EXPORT_SYMBOL_GPL(icssg_config);
513
514 /* Bitmask for ICSSG r30 commands */
515 static const struct icssg_r30_cmd emac_r32_bitmask[] = {
516 {{0xffff0004, 0xffff0100, 0xffff0004, EMAC_NONE}}, /* EMAC_PORT_DISABLE */
517 {{0xfffb0040, 0xfeff0200, 0xfeff0200, EMAC_NONE}}, /* EMAC_PORT_BLOCK */
518 {{0xffbb0000, 0xfcff0000, 0xdcfb0000, EMAC_NONE}}, /* EMAC_PORT_FORWARD */
519 {{0xffbb0000, 0xfcff0000, 0xfcff2000, EMAC_NONE}}, /* EMAC_PORT_FORWARD_WO_LEARNING */
520 {{0xffff0001, EMAC_NONE, EMAC_NONE, EMAC_NONE}}, /* ACCEPT ALL */
521 {{0xfffe0002, EMAC_NONE, EMAC_NONE, EMAC_NONE}}, /* ACCEPT TAGGED */
522 {{0xfffc0000, EMAC_NONE, EMAC_NONE, EMAC_NONE}}, /* ACCEPT UNTAGGED and PRIO */
523 {{EMAC_NONE, 0xffff0020, EMAC_NONE, EMAC_NONE}}, /* TAS Trigger List change */
524 {{EMAC_NONE, 0xdfff1000, EMAC_NONE, EMAC_NONE}}, /* TAS set state ENABLE*/
525 {{EMAC_NONE, 0xefff2000, EMAC_NONE, EMAC_NONE}}, /* TAS set state RESET*/
526 {{EMAC_NONE, 0xcfff0000, EMAC_NONE, EMAC_NONE}}, /* TAS set state DISABLE*/
527 {{EMAC_NONE, EMAC_NONE, 0xffff0400, EMAC_NONE}}, /* UC flooding ENABLE*/
528 {{EMAC_NONE, EMAC_NONE, 0xfbff0000, EMAC_NONE}}, /* UC flooding DISABLE*/
529 {{EMAC_NONE, EMAC_NONE, 0xffff0800, EMAC_NONE}}, /* MC flooding ENABLE*/
530 {{EMAC_NONE, EMAC_NONE, 0xf7ff0000, EMAC_NONE}}, /* MC flooding DISABLE*/
531 {{EMAC_NONE, 0xffff4000, EMAC_NONE, EMAC_NONE}}, /* Preemption on Tx ENABLE*/
532 {{EMAC_NONE, 0xbfff0000, EMAC_NONE, EMAC_NONE}}, /* Preemption on Tx DISABLE*/
533 {{0xffff0010, EMAC_NONE, 0xffff0010, EMAC_NONE}}, /* VLAN AWARE*/
534 {{0xffef0000, EMAC_NONE, 0xffef0000, EMAC_NONE}}, /* VLAN UNWARE*/
535 {{0xffff2000, EMAC_NONE, EMAC_NONE, EMAC_NONE}}, /* HSR_RX_OFFLOAD_ENABLE */
536 {{0xdfff0000, EMAC_NONE, EMAC_NONE, EMAC_NONE}} /* HSR_RX_OFFLOAD_DISABLE */
537 };
538
icssg_set_port_state(struct prueth_emac * emac,enum icssg_port_state_cmd cmd)539 int icssg_set_port_state(struct prueth_emac *emac,
540 enum icssg_port_state_cmd cmd)
541 {
542 struct icssg_r30_cmd __iomem *p;
543 int ret = -ETIMEDOUT;
544 int done = 0;
545 int i;
546
547 p = emac->dram.va + MGR_R30_CMD_OFFSET;
548
549 if (cmd >= ICSSG_EMAC_PORT_MAX_COMMANDS) {
550 netdev_err(emac->ndev, "invalid port command\n");
551 return -EINVAL;
552 }
553
554 /* only one command at a time allowed to firmware */
555 mutex_lock(&emac->cmd_lock);
556
557 for (i = 0; i < 4; i++)
558 writel(emac_r32_bitmask[cmd].cmd[i], &p->cmd[i]);
559
560 /* wait for done */
561 ret = read_poll_timeout(emac_r30_is_done, done, done == 1,
562 1000, 10000, false, emac);
563
564 if (ret == -ETIMEDOUT)
565 netdev_err(emac->ndev, "timeout waiting for command done\n");
566
567 mutex_unlock(&emac->cmd_lock);
568
569 return ret;
570 }
571 EXPORT_SYMBOL_GPL(icssg_set_port_state);
572
icssg_config_half_duplex(struct prueth_emac * emac)573 void icssg_config_half_duplex(struct prueth_emac *emac)
574 {
575 u32 val;
576
577 if (!emac->half_duplex)
578 return;
579
580 val = get_random_u32();
581 writel(val, emac->dram.va + HD_RAND_SEED_OFFSET);
582 }
583 EXPORT_SYMBOL_GPL(icssg_config_half_duplex);
584
icssg_config_set_speed(struct prueth_emac * emac)585 void icssg_config_set_speed(struct prueth_emac *emac)
586 {
587 u8 fw_speed;
588
589 switch (emac->speed) {
590 case SPEED_1000:
591 fw_speed = FW_LINK_SPEED_1G;
592 break;
593 case SPEED_100:
594 fw_speed = FW_LINK_SPEED_100M;
595 break;
596 case SPEED_10:
597 fw_speed = FW_LINK_SPEED_10M;
598 break;
599 default:
600 /* Other links speeds not supported */
601 netdev_err(emac->ndev, "Unsupported link speed\n");
602 return;
603 }
604
605 if (emac->duplex == DUPLEX_HALF)
606 fw_speed |= FW_LINK_SPEED_HD;
607
608 writeb(fw_speed, emac->dram.va + PORT_LINK_SPEED_OFFSET);
609 }
610 EXPORT_SYMBOL_GPL(icssg_config_set_speed);
611
icssg_send_fdb_msg(struct prueth_emac * emac,struct mgmt_cmd * cmd,struct mgmt_cmd_rsp * rsp)612 int icssg_send_fdb_msg(struct prueth_emac *emac, struct mgmt_cmd *cmd,
613 struct mgmt_cmd_rsp *rsp)
614 {
615 struct prueth *prueth = emac->prueth;
616 int slice = prueth_emac_slice(emac);
617 int addr, ret;
618
619 addr = icssg_queue_pop(prueth, slice == 0 ?
620 ICSSG_CMD_POP_SLICE0 : ICSSG_CMD_POP_SLICE1);
621 if (addr < 0)
622 return addr;
623
624 /* First 4 bytes have FW owned buffer linking info which should
625 * not be touched
626 */
627 memcpy_toio(prueth->shram.va + addr + 4, cmd, sizeof(*cmd));
628 icssg_queue_push(prueth, slice == 0 ?
629 ICSSG_CMD_PUSH_SLICE0 : ICSSG_CMD_PUSH_SLICE1, addr);
630 ret = read_poll_timeout(icssg_queue_pop, addr, addr >= 0,
631 2000, 20000000, false, prueth, slice == 0 ?
632 ICSSG_RSP_POP_SLICE0 : ICSSG_RSP_POP_SLICE1);
633 if (ret) {
634 netdev_err(emac->ndev, "Timedout sending HWQ message\n");
635 return ret;
636 }
637
638 memcpy_fromio(rsp, prueth->shram.va + addr, sizeof(*rsp));
639 /* Return buffer back for to pool */
640 icssg_queue_push(prueth, slice == 0 ?
641 ICSSG_RSP_PUSH_SLICE0 : ICSSG_RSP_PUSH_SLICE1, addr);
642
643 return 0;
644 }
645 EXPORT_SYMBOL_GPL(icssg_send_fdb_msg);
646
icssg_fdb_setup(struct prueth_emac * emac,struct mgmt_cmd * fdb_cmd,const unsigned char * addr,u8 fid,int cmd)647 static void icssg_fdb_setup(struct prueth_emac *emac, struct mgmt_cmd *fdb_cmd,
648 const unsigned char *addr, u8 fid, int cmd)
649 {
650 int slice = prueth_emac_slice(emac);
651 u8 mac_fid[ETH_ALEN + 2];
652 u16 fdb_slot;
653
654 ether_addr_copy(mac_fid, addr);
655
656 /* 1-1 VID-FID mapping is already setup */
657 mac_fid[ETH_ALEN] = fid;
658 mac_fid[ETH_ALEN + 1] = 0;
659
660 fdb_slot = bitrev32(crc32_le(0, mac_fid, 8)) & PRUETH_SWITCH_FDB_MASK;
661
662 fdb_cmd->header = ICSSG_FW_MGMT_CMD_HEADER;
663 fdb_cmd->type = ICSSG_FW_MGMT_FDB_CMD_TYPE;
664 fdb_cmd->seqnum = ++(emac->prueth->icssg_hwcmdseq);
665 fdb_cmd->param = cmd;
666 fdb_cmd->param |= (slice << 4);
667
668 memcpy(&fdb_cmd->cmd_args[0], addr, 4);
669 memcpy(&fdb_cmd->cmd_args[1], &addr[4], 2);
670 fdb_cmd->cmd_args[2] = fdb_slot;
671
672 netdev_dbg(emac->ndev, "MAC %pM slot %X FID %X\n", addr, fdb_slot, fid);
673 }
674
icssg_fdb_add_del(struct prueth_emac * emac,const unsigned char * addr,u8 vid,u8 fid_c2,bool add)675 int icssg_fdb_add_del(struct prueth_emac *emac, const unsigned char *addr,
676 u8 vid, u8 fid_c2, bool add)
677 {
678 struct mgmt_cmd_rsp fdb_cmd_rsp = { 0 };
679 struct mgmt_cmd fdb_cmd = { 0 };
680 u8 fid = vid;
681 int ret;
682
683 icssg_fdb_setup(emac, &fdb_cmd, addr, fid, add ? ICSS_CMD_ADD_FDB : ICSS_CMD_DEL_FDB);
684
685 fid_c2 |= ICSSG_FDB_ENTRY_VALID;
686 fdb_cmd.cmd_args[1] |= ((fid << 16) | (fid_c2 << 24));
687
688 ret = icssg_send_fdb_msg(emac, &fdb_cmd, &fdb_cmd_rsp);
689 if (ret)
690 return ret;
691
692 WARN_ON(fdb_cmd.seqnum != fdb_cmd_rsp.seqnum);
693 if (fdb_cmd_rsp.status == 1)
694 return 0;
695
696 return -EINVAL;
697 }
698 EXPORT_SYMBOL_GPL(icssg_fdb_add_del);
699
icssg_fdb_lookup(struct prueth_emac * emac,const unsigned char * addr,u8 vid)700 int icssg_fdb_lookup(struct prueth_emac *emac, const unsigned char *addr,
701 u8 vid)
702 {
703 struct mgmt_cmd_rsp fdb_cmd_rsp = { 0 };
704 struct mgmt_cmd fdb_cmd = { 0 };
705 struct prueth_fdb_slot *slot;
706 u8 fid = vid;
707 int ret, i;
708
709 icssg_fdb_setup(emac, &fdb_cmd, addr, fid, ICSS_CMD_GET_FDB_SLOT);
710
711 fdb_cmd.cmd_args[1] |= fid << 16;
712
713 ret = icssg_send_fdb_msg(emac, &fdb_cmd, &fdb_cmd_rsp);
714 if (ret)
715 return ret;
716
717 WARN_ON(fdb_cmd.seqnum != fdb_cmd_rsp.seqnum);
718
719 slot = (struct prueth_fdb_slot __force *)(emac->dram.va + FDB_CMD_BUFFER);
720 for (i = 0; i < 4; i++) {
721 if (ether_addr_equal(addr, slot->mac) && vid == slot->fid)
722 return (slot->fid_c2 & ~ICSSG_FDB_ENTRY_VALID);
723 slot++;
724 }
725
726 return 0;
727 }
728 EXPORT_SYMBOL_GPL(icssg_fdb_lookup);
729
icssg_vtbl_modify(struct prueth_emac * emac,u8 vid,u8 port_mask,u8 untag_mask,bool add)730 void icssg_vtbl_modify(struct prueth_emac *emac, u8 vid, u8 port_mask,
731 u8 untag_mask, bool add)
732 {
733 struct prueth *prueth = emac->prueth;
734 struct prueth_vlan_tbl *tbl;
735 u8 fid_c1;
736
737 tbl = prueth->vlan_tbl;
738 spin_lock(&prueth->vtbl_lock);
739 fid_c1 = tbl[vid].fid_c1;
740
741 /* FID_C1: bit0..2 port membership mask,
742 * bit3..5 tagging mask for each port
743 * bit6 Stream VID (not handled currently)
744 * bit7 MC flood (not handled currently)
745 */
746 if (add) {
747 fid_c1 |= (port_mask | port_mask << 3);
748 fid_c1 &= ~(untag_mask << 3);
749 } else {
750 fid_c1 &= ~(port_mask | port_mask << 3);
751 }
752
753 tbl[vid].fid_c1 = fid_c1;
754 spin_unlock(&prueth->vtbl_lock);
755 }
756 EXPORT_SYMBOL_GPL(icssg_vtbl_modify);
757
icssg_get_pvid(struct prueth_emac * emac)758 u16 icssg_get_pvid(struct prueth_emac *emac)
759 {
760 struct prueth *prueth = emac->prueth;
761 u32 pvid;
762
763 if (emac->port_id == PRUETH_PORT_MII0)
764 pvid = readl(prueth->shram.va + EMAC_ICSSG_SWITCH_PORT1_DEFAULT_VLAN_OFFSET);
765 else
766 pvid = readl(prueth->shram.va + EMAC_ICSSG_SWITCH_PORT2_DEFAULT_VLAN_OFFSET);
767
768 pvid = pvid >> 24;
769
770 return pvid;
771 }
772 EXPORT_SYMBOL_GPL(icssg_get_pvid);
773
icssg_set_pvid(struct prueth * prueth,u8 vid,u8 port)774 void icssg_set_pvid(struct prueth *prueth, u8 vid, u8 port)
775 {
776 u32 pvid;
777
778 /* only 256 VLANs are supported */
779 pvid = (u32 __force)cpu_to_be32((ETH_P_8021Q << 16) | (vid & 0xff));
780
781 if (port == PRUETH_PORT_MII0)
782 writel(pvid, prueth->shram.va + EMAC_ICSSG_SWITCH_PORT1_DEFAULT_VLAN_OFFSET);
783 else if (port == PRUETH_PORT_MII1)
784 writel(pvid, prueth->shram.va + EMAC_ICSSG_SWITCH_PORT2_DEFAULT_VLAN_OFFSET);
785 else
786 writel(pvid, prueth->shram.va + EMAC_ICSSG_SWITCH_PORT0_DEFAULT_VLAN_OFFSET);
787 }
788 EXPORT_SYMBOL_GPL(icssg_set_pvid);
789