1 // SPDX-License-Identifier: GPL-2.0
2 /* Texas Instruments K3 AM65 Ethernet Switch SubSystem Driver
3 *
4 * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
5 *
6 */
7
8 #include <linux/clk.h>
9 #include <linux/etherdevice.h>
10 #include <linux/if_vlan.h>
11 #include <linux/interrupt.h>
12 #include <linux/irqdomain.h>
13 #include <linux/kernel.h>
14 #include <linux/kmemleak.h>
15 #include <linux/module.h>
16 #include <linux/netdevice.h>
17 #include <linux/net_tstamp.h>
18 #include <linux/of.h>
19 #include <linux/of_mdio.h>
20 #include <linux/of_net.h>
21 #include <linux/of_device.h>
22 #include <linux/phylink.h>
23 #include <linux/phy/phy.h>
24 #include <linux/platform_device.h>
25 #include <linux/pm_runtime.h>
26 #include <linux/regmap.h>
27 #include <linux/mfd/syscon.h>
28 #include <linux/sys_soc.h>
29 #include <linux/dma/ti-cppi5.h>
30 #include <linux/dma/k3-udma-glue.h>
31 #include <net/switchdev.h>
32
33 #include "cpsw_ale.h"
34 #include "cpsw_sl.h"
35 #include "am65-cpsw-nuss.h"
36 #include "am65-cpsw-switchdev.h"
37 #include "k3-cppi-desc-pool.h"
38 #include "am65-cpts.h"
39
40 #define AM65_CPSW_SS_BASE 0x0
41 #define AM65_CPSW_SGMII_BASE 0x100
42 #define AM65_CPSW_XGMII_BASE 0x2100
43 #define AM65_CPSW_CPSW_NU_BASE 0x20000
44 #define AM65_CPSW_NU_PORTS_BASE 0x1000
45 #define AM65_CPSW_NU_FRAM_BASE 0x12000
46 #define AM65_CPSW_NU_STATS_BASE 0x1a000
47 #define AM65_CPSW_NU_ALE_BASE 0x1e000
48 #define AM65_CPSW_NU_CPTS_BASE 0x1d000
49
50 #define AM65_CPSW_NU_PORTS_OFFSET 0x1000
51 #define AM65_CPSW_NU_STATS_PORT_OFFSET 0x200
52 #define AM65_CPSW_NU_FRAM_PORT_OFFSET 0x200
53
54 #define AM65_CPSW_MAX_PORTS 8
55
56 #define AM65_CPSW_MIN_PACKET_SIZE VLAN_ETH_ZLEN
57 #define AM65_CPSW_MAX_PACKET_SIZE (VLAN_ETH_FRAME_LEN + ETH_FCS_LEN)
58
59 #define AM65_CPSW_REG_CTL 0x004
60 #define AM65_CPSW_REG_STAT_PORT_EN 0x014
61 #define AM65_CPSW_REG_PTYPE 0x018
62
63 #define AM65_CPSW_P0_REG_CTL 0x004
64 #define AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET 0x008
65
66 #define AM65_CPSW_PORT_REG_PRI_CTL 0x01c
67 #define AM65_CPSW_PORT_REG_RX_PRI_MAP 0x020
68 #define AM65_CPSW_PORT_REG_RX_MAXLEN 0x024
69
70 #define AM65_CPSW_PORTN_REG_SA_L 0x308
71 #define AM65_CPSW_PORTN_REG_SA_H 0x30c
72 #define AM65_CPSW_PORTN_REG_TS_CTL 0x310
73 #define AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG 0x314
74 #define AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG 0x318
75 #define AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2 0x31C
76
77 #define AM65_CPSW_SGMII_CONTROL_REG 0x010
78 #define AM65_CPSW_SGMII_CONTROL_MR_AN_ENABLE BIT(0)
79
80 #define AM65_CPSW_CTL_VLAN_AWARE BIT(1)
81 #define AM65_CPSW_CTL_P0_ENABLE BIT(2)
82 #define AM65_CPSW_CTL_P0_TX_CRC_REMOVE BIT(13)
83 #define AM65_CPSW_CTL_P0_RX_PAD BIT(14)
84
85 /* AM65_CPSW_P0_REG_CTL */
86 #define AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN BIT(0)
87
88 /* AM65_CPSW_PORT_REG_PRI_CTL */
89 #define AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN BIT(8)
90
91 /* AM65_CPSW_PN_TS_CTL register fields */
92 #define AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN BIT(4)
93 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN BIT(5)
94 #define AM65_CPSW_PN_TS_CTL_TX_VLAN_LT2_EN BIT(6)
95 #define AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN BIT(7)
96 #define AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN BIT(10)
97 #define AM65_CPSW_PN_TS_CTL_TX_HOST_TS_EN BIT(11)
98 #define AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT 16
99
100 /* AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG register fields */
101 #define AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT 16
102
103 /* AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2 */
104 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107 BIT(16)
105 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129 BIT(17)
106 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130 BIT(18)
107 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131 BIT(19)
108 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132 BIT(20)
109 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319 BIT(21)
110 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320 BIT(22)
111 #define AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO BIT(23)
112
113 /* The PTP event messages - Sync, Delay_Req, Pdelay_Req, and Pdelay_Resp. */
114 #define AM65_CPSW_TS_EVENT_MSG_TYPE_BITS (BIT(0) | BIT(1) | BIT(2) | BIT(3))
115
116 #define AM65_CPSW_TS_SEQ_ID_OFFSET (0x1e)
117
118 #define AM65_CPSW_TS_TX_ANX_ALL_EN \
119 (AM65_CPSW_PN_TS_CTL_TX_ANX_D_EN | \
120 AM65_CPSW_PN_TS_CTL_TX_ANX_E_EN | \
121 AM65_CPSW_PN_TS_CTL_TX_ANX_F_EN)
122
123 #define AM65_CPSW_ALE_AGEOUT_DEFAULT 30
124 /* Number of TX/RX descriptors */
125 #define AM65_CPSW_MAX_TX_DESC 500
126 #define AM65_CPSW_MAX_RX_DESC 500
127
128 #define AM65_CPSW_NAV_PS_DATA_SIZE 16
129 #define AM65_CPSW_NAV_SW_DATA_SIZE 16
130
131 #define AM65_CPSW_DEBUG (NETIF_MSG_HW | NETIF_MSG_DRV | NETIF_MSG_LINK | \
132 NETIF_MSG_IFUP | NETIF_MSG_PROBE | NETIF_MSG_IFDOWN | \
133 NETIF_MSG_RX_ERR | NETIF_MSG_TX_ERR)
134
am65_cpsw_port_set_sl_mac(struct am65_cpsw_port * slave,const u8 * dev_addr)135 static void am65_cpsw_port_set_sl_mac(struct am65_cpsw_port *slave,
136 const u8 *dev_addr)
137 {
138 u32 mac_hi = (dev_addr[0] << 0) | (dev_addr[1] << 8) |
139 (dev_addr[2] << 16) | (dev_addr[3] << 24);
140 u32 mac_lo = (dev_addr[4] << 0) | (dev_addr[5] << 8);
141
142 writel(mac_hi, slave->port_base + AM65_CPSW_PORTN_REG_SA_H);
143 writel(mac_lo, slave->port_base + AM65_CPSW_PORTN_REG_SA_L);
144 }
145
am65_cpsw_sl_ctl_reset(struct am65_cpsw_port * port)146 static void am65_cpsw_sl_ctl_reset(struct am65_cpsw_port *port)
147 {
148 cpsw_sl_reset(port->slave.mac_sl, 100);
149 /* Max length register has to be restored after MAC SL reset */
150 writel(AM65_CPSW_MAX_PACKET_SIZE,
151 port->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
152 }
153
am65_cpsw_nuss_get_ver(struct am65_cpsw_common * common)154 static void am65_cpsw_nuss_get_ver(struct am65_cpsw_common *common)
155 {
156 common->nuss_ver = readl(common->ss_base);
157 common->cpsw_ver = readl(common->cpsw_base);
158 dev_info(common->dev,
159 "initializing am65 cpsw nuss version 0x%08X, cpsw version 0x%08X Ports: %u quirks:%08x\n",
160 common->nuss_ver,
161 common->cpsw_ver,
162 common->port_num + 1,
163 common->pdata.quirks);
164 }
165
am65_cpsw_nuss_ndo_slave_add_vid(struct net_device * ndev,__be16 proto,u16 vid)166 static int am65_cpsw_nuss_ndo_slave_add_vid(struct net_device *ndev,
167 __be16 proto, u16 vid)
168 {
169 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
170 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
171 u32 port_mask, unreg_mcast = 0;
172 int ret;
173
174 if (!common->is_emac_mode)
175 return 0;
176
177 if (!netif_running(ndev) || !vid)
178 return 0;
179
180 ret = pm_runtime_resume_and_get(common->dev);
181 if (ret < 0)
182 return ret;
183
184 port_mask = BIT(port->port_id) | ALE_PORT_HOST;
185 if (!vid)
186 unreg_mcast = port_mask;
187 dev_info(common->dev, "Adding vlan %d to vlan filter\n", vid);
188 ret = cpsw_ale_vlan_add_modify(common->ale, vid, port_mask,
189 unreg_mcast, port_mask, 0);
190
191 pm_runtime_put(common->dev);
192 return ret;
193 }
194
am65_cpsw_nuss_ndo_slave_kill_vid(struct net_device * ndev,__be16 proto,u16 vid)195 static int am65_cpsw_nuss_ndo_slave_kill_vid(struct net_device *ndev,
196 __be16 proto, u16 vid)
197 {
198 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
199 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
200 int ret;
201
202 if (!common->is_emac_mode)
203 return 0;
204
205 if (!netif_running(ndev) || !vid)
206 return 0;
207
208 ret = pm_runtime_resume_and_get(common->dev);
209 if (ret < 0)
210 return ret;
211
212 dev_info(common->dev, "Removing vlan %d from vlan filter\n", vid);
213 ret = cpsw_ale_del_vlan(common->ale, vid,
214 BIT(port->port_id) | ALE_PORT_HOST);
215
216 pm_runtime_put(common->dev);
217 return ret;
218 }
219
am65_cpsw_slave_set_promisc(struct am65_cpsw_port * port,bool promisc)220 static void am65_cpsw_slave_set_promisc(struct am65_cpsw_port *port,
221 bool promisc)
222 {
223 struct am65_cpsw_common *common = port->common;
224
225 if (promisc && !common->is_emac_mode) {
226 dev_dbg(common->dev, "promisc mode requested in switch mode");
227 return;
228 }
229
230 if (promisc) {
231 /* Enable promiscuous mode */
232 cpsw_ale_control_set(common->ale, port->port_id,
233 ALE_PORT_MACONLY_CAF, 1);
234 dev_dbg(common->dev, "promisc enabled\n");
235 } else {
236 /* Disable promiscuous mode */
237 cpsw_ale_control_set(common->ale, port->port_id,
238 ALE_PORT_MACONLY_CAF, 0);
239 dev_dbg(common->dev, "promisc disabled\n");
240 }
241 }
242
am65_cpsw_nuss_ndo_slave_set_rx_mode(struct net_device * ndev)243 static void am65_cpsw_nuss_ndo_slave_set_rx_mode(struct net_device *ndev)
244 {
245 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
246 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
247 u32 port_mask;
248 bool promisc;
249
250 promisc = !!(ndev->flags & IFF_PROMISC);
251 am65_cpsw_slave_set_promisc(port, promisc);
252
253 if (promisc)
254 return;
255
256 /* Restore allmulti on vlans if necessary */
257 cpsw_ale_set_allmulti(common->ale,
258 ndev->flags & IFF_ALLMULTI, port->port_id);
259
260 port_mask = ALE_PORT_HOST;
261 /* Clear all mcast from ALE */
262 cpsw_ale_flush_multicast(common->ale, port_mask, -1);
263
264 if (!netdev_mc_empty(ndev)) {
265 struct netdev_hw_addr *ha;
266
267 /* program multicast address list into ALE register */
268 netdev_for_each_mc_addr(ha, ndev) {
269 cpsw_ale_add_mcast(common->ale, ha->addr,
270 port_mask, 0, 0, 0);
271 }
272 }
273 }
274
am65_cpsw_nuss_ndo_host_tx_timeout(struct net_device * ndev,unsigned int txqueue)275 static void am65_cpsw_nuss_ndo_host_tx_timeout(struct net_device *ndev,
276 unsigned int txqueue)
277 {
278 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
279 struct am65_cpsw_tx_chn *tx_chn;
280 struct netdev_queue *netif_txq;
281 unsigned long trans_start;
282
283 netif_txq = netdev_get_tx_queue(ndev, txqueue);
284 tx_chn = &common->tx_chns[txqueue];
285 trans_start = READ_ONCE(netif_txq->trans_start);
286
287 netdev_err(ndev, "txq:%d DRV_XOFF:%d tmo:%u dql_avail:%d free_desc:%zu\n",
288 txqueue,
289 netif_tx_queue_stopped(netif_txq),
290 jiffies_to_msecs(jiffies - trans_start),
291 dql_avail(&netif_txq->dql),
292 k3_cppi_desc_pool_avail(tx_chn->desc_pool));
293
294 if (netif_tx_queue_stopped(netif_txq)) {
295 /* try recover if stopped by us */
296 txq_trans_update(netif_txq);
297 netif_tx_wake_queue(netif_txq);
298 }
299 }
300
am65_cpsw_nuss_rx_push(struct am65_cpsw_common * common,struct sk_buff * skb)301 static int am65_cpsw_nuss_rx_push(struct am65_cpsw_common *common,
302 struct sk_buff *skb)
303 {
304 struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
305 struct cppi5_host_desc_t *desc_rx;
306 struct device *dev = common->dev;
307 u32 pkt_len = skb_tailroom(skb);
308 dma_addr_t desc_dma;
309 dma_addr_t buf_dma;
310 void *swdata;
311
312 desc_rx = k3_cppi_desc_pool_alloc(rx_chn->desc_pool);
313 if (!desc_rx) {
314 dev_err(dev, "Failed to allocate RXFDQ descriptor\n");
315 return -ENOMEM;
316 }
317 desc_dma = k3_cppi_desc_pool_virt2dma(rx_chn->desc_pool, desc_rx);
318
319 buf_dma = dma_map_single(rx_chn->dma_dev, skb->data, pkt_len,
320 DMA_FROM_DEVICE);
321 if (unlikely(dma_mapping_error(rx_chn->dma_dev, buf_dma))) {
322 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
323 dev_err(dev, "Failed to map rx skb buffer\n");
324 return -EINVAL;
325 }
326
327 cppi5_hdesc_init(desc_rx, CPPI5_INFO0_HDESC_EPIB_PRESENT,
328 AM65_CPSW_NAV_PS_DATA_SIZE);
329 k3_udma_glue_rx_dma_to_cppi5_addr(rx_chn->rx_chn, &buf_dma);
330 cppi5_hdesc_attach_buf(desc_rx, buf_dma, skb_tailroom(skb), buf_dma, skb_tailroom(skb));
331 swdata = cppi5_hdesc_get_swdata(desc_rx);
332 *((void **)swdata) = skb;
333
334 return k3_udma_glue_push_rx_chn(rx_chn->rx_chn, 0, desc_rx, desc_dma);
335 }
336
am65_cpsw_nuss_set_p0_ptype(struct am65_cpsw_common * common)337 void am65_cpsw_nuss_set_p0_ptype(struct am65_cpsw_common *common)
338 {
339 struct am65_cpsw_host *host_p = am65_common_get_host(common);
340 u32 val, pri_map;
341
342 /* P0 set Receive Priority Type */
343 val = readl(host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
344
345 if (common->pf_p0_rx_ptype_rrobin) {
346 val |= AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
347 /* Enet Ports fifos works in fixed priority mode only, so
348 * reset P0_Rx_Pri_Map so all packet will go in Enet fifo 0
349 */
350 pri_map = 0x0;
351 } else {
352 val &= ~AM65_CPSW_PORT_REG_PRI_CTL_RX_PTYPE_RROBIN;
353 /* restore P0_Rx_Pri_Map */
354 pri_map = 0x76543210;
355 }
356
357 writel(pri_map, host_p->port_base + AM65_CPSW_PORT_REG_RX_PRI_MAP);
358 writel(val, host_p->port_base + AM65_CPSW_PORT_REG_PRI_CTL);
359 }
360
361 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common);
362 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common);
363 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port);
364 static void am65_cpsw_init_port_emac_ale(struct am65_cpsw_port *port);
365
am65_cpsw_nuss_common_open(struct am65_cpsw_common * common)366 static int am65_cpsw_nuss_common_open(struct am65_cpsw_common *common)
367 {
368 struct am65_cpsw_host *host_p = am65_common_get_host(common);
369 int port_idx, i, ret;
370 struct sk_buff *skb;
371 u32 val, port_mask;
372
373 if (common->usage_count)
374 return 0;
375
376 /* Control register */
377 writel(AM65_CPSW_CTL_P0_ENABLE | AM65_CPSW_CTL_P0_TX_CRC_REMOVE |
378 AM65_CPSW_CTL_VLAN_AWARE | AM65_CPSW_CTL_P0_RX_PAD,
379 common->cpsw_base + AM65_CPSW_REG_CTL);
380 /* Max length register */
381 writel(AM65_CPSW_MAX_PACKET_SIZE,
382 host_p->port_base + AM65_CPSW_PORT_REG_RX_MAXLEN);
383 /* set base flow_id */
384 writel(common->rx_flow_id_base,
385 host_p->port_base + AM65_CPSW_PORT0_REG_FLOW_ID_OFFSET);
386 /* en tx crc offload */
387 writel(AM65_CPSW_P0_REG_CTL_RX_CHECKSUM_EN, host_p->port_base + AM65_CPSW_P0_REG_CTL);
388
389 am65_cpsw_nuss_set_p0_ptype(common);
390
391 /* enable statistic */
392 val = BIT(HOST_PORT_NUM);
393 for (port_idx = 0; port_idx < common->port_num; port_idx++) {
394 struct am65_cpsw_port *port = &common->ports[port_idx];
395
396 if (!port->disabled)
397 val |= BIT(port->port_id);
398 }
399 writel(val, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
400
401 /* disable priority elevation */
402 writel(0, common->cpsw_base + AM65_CPSW_REG_PTYPE);
403
404 cpsw_ale_start(common->ale);
405
406 /* limit to one RX flow only */
407 cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
408 ALE_DEFAULT_THREAD_ID, 0);
409 cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
410 ALE_DEFAULT_THREAD_ENABLE, 1);
411 /* switch to vlan unaware mode */
412 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_VLAN_AWARE, 1);
413 cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
414 ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
415
416 /* default vlan cfg: create mask based on enabled ports */
417 port_mask = GENMASK(common->port_num, 0) &
418 ~common->disabled_ports_mask;
419
420 cpsw_ale_add_vlan(common->ale, 0, port_mask,
421 port_mask, port_mask,
422 port_mask & ~ALE_PORT_HOST);
423
424 if (common->is_emac_mode)
425 am65_cpsw_init_host_port_emac(common);
426 else
427 am65_cpsw_init_host_port_switch(common);
428
429 for (i = 0; i < common->rx_chns.descs_num; i++) {
430 skb = __netdev_alloc_skb_ip_align(NULL,
431 AM65_CPSW_MAX_PACKET_SIZE,
432 GFP_KERNEL);
433 if (!skb) {
434 dev_err(common->dev, "cannot allocate skb\n");
435 return -ENOMEM;
436 }
437
438 ret = am65_cpsw_nuss_rx_push(common, skb);
439 if (ret < 0) {
440 dev_err(common->dev,
441 "cannot submit skb to channel rx, error %d\n",
442 ret);
443 kfree_skb(skb);
444 return ret;
445 }
446 kmemleak_not_leak(skb);
447 }
448 k3_udma_glue_enable_rx_chn(common->rx_chns.rx_chn);
449
450 for (i = 0; i < common->tx_ch_num; i++) {
451 ret = k3_udma_glue_enable_tx_chn(common->tx_chns[i].tx_chn);
452 if (ret)
453 return ret;
454 napi_enable(&common->tx_chns[i].napi_tx);
455 }
456
457 napi_enable(&common->napi_rx);
458 if (common->rx_irq_disabled) {
459 common->rx_irq_disabled = false;
460 enable_irq(common->rx_chns.irq);
461 }
462
463 dev_dbg(common->dev, "cpsw_nuss started\n");
464 return 0;
465 }
466
467 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma);
468 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma);
469
am65_cpsw_nuss_common_stop(struct am65_cpsw_common * common)470 static int am65_cpsw_nuss_common_stop(struct am65_cpsw_common *common)
471 {
472 int i;
473
474 if (common->usage_count != 1)
475 return 0;
476
477 cpsw_ale_control_set(common->ale, HOST_PORT_NUM,
478 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
479
480 /* shutdown tx channels */
481 atomic_set(&common->tdown_cnt, common->tx_ch_num);
482 /* ensure new tdown_cnt value is visible */
483 smp_mb__after_atomic();
484 reinit_completion(&common->tdown_complete);
485
486 for (i = 0; i < common->tx_ch_num; i++)
487 k3_udma_glue_tdown_tx_chn(common->tx_chns[i].tx_chn, false);
488
489 i = wait_for_completion_timeout(&common->tdown_complete,
490 msecs_to_jiffies(1000));
491 if (!i)
492 dev_err(common->dev, "tx timeout\n");
493 for (i = 0; i < common->tx_ch_num; i++)
494 napi_disable(&common->tx_chns[i].napi_tx);
495
496 for (i = 0; i < common->tx_ch_num; i++) {
497 k3_udma_glue_reset_tx_chn(common->tx_chns[i].tx_chn,
498 &common->tx_chns[i],
499 am65_cpsw_nuss_tx_cleanup);
500 k3_udma_glue_disable_tx_chn(common->tx_chns[i].tx_chn);
501 }
502
503 k3_udma_glue_tdown_rx_chn(common->rx_chns.rx_chn, true);
504 napi_disable(&common->napi_rx);
505
506 for (i = 0; i < AM65_CPSW_MAX_RX_FLOWS; i++)
507 k3_udma_glue_reset_rx_chn(common->rx_chns.rx_chn, i,
508 &common->rx_chns,
509 am65_cpsw_nuss_rx_cleanup, !!i);
510
511 k3_udma_glue_disable_rx_chn(common->rx_chns.rx_chn);
512
513 cpsw_ale_stop(common->ale);
514
515 writel(0, common->cpsw_base + AM65_CPSW_REG_CTL);
516 writel(0, common->cpsw_base + AM65_CPSW_REG_STAT_PORT_EN);
517
518 dev_dbg(common->dev, "cpsw_nuss stopped\n");
519 return 0;
520 }
521
am65_cpsw_nuss_ndo_slave_stop(struct net_device * ndev)522 static int am65_cpsw_nuss_ndo_slave_stop(struct net_device *ndev)
523 {
524 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
525 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
526 int ret;
527
528 phylink_stop(port->slave.phylink);
529
530 netif_tx_stop_all_queues(ndev);
531
532 phylink_disconnect_phy(port->slave.phylink);
533
534 ret = am65_cpsw_nuss_common_stop(common);
535 if (ret)
536 return ret;
537
538 common->usage_count--;
539 pm_runtime_put(common->dev);
540 return 0;
541 }
542
cpsw_restore_vlans(struct net_device * vdev,int vid,void * arg)543 static int cpsw_restore_vlans(struct net_device *vdev, int vid, void *arg)
544 {
545 struct am65_cpsw_port *port = arg;
546
547 if (!vdev)
548 return 0;
549
550 return am65_cpsw_nuss_ndo_slave_add_vid(port->ndev, 0, vid);
551 }
552
am65_cpsw_nuss_ndo_slave_open(struct net_device * ndev)553 static int am65_cpsw_nuss_ndo_slave_open(struct net_device *ndev)
554 {
555 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
556 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
557 int ret, i;
558
559 ret = pm_runtime_resume_and_get(common->dev);
560 if (ret < 0)
561 return ret;
562
563 /* Notify the stack of the actual queue counts. */
564 ret = netif_set_real_num_tx_queues(ndev, common->tx_ch_num);
565 if (ret) {
566 dev_err(common->dev, "cannot set real number of tx queues\n");
567 return ret;
568 }
569
570 ret = netif_set_real_num_rx_queues(ndev, AM65_CPSW_MAX_RX_QUEUES);
571 if (ret) {
572 dev_err(common->dev, "cannot set real number of rx queues\n");
573 return ret;
574 }
575
576 for (i = 0; i < common->tx_ch_num; i++)
577 netdev_tx_reset_queue(netdev_get_tx_queue(ndev, i));
578
579 ret = am65_cpsw_nuss_common_open(common);
580 if (ret)
581 return ret;
582
583 common->usage_count++;
584
585 am65_cpsw_port_set_sl_mac(port, ndev->dev_addr);
586
587 if (common->is_emac_mode)
588 am65_cpsw_init_port_emac_ale(port);
589 else
590 am65_cpsw_init_port_switch_ale(port);
591
592 /* mac_sl should be configured via phy-link interface */
593 am65_cpsw_sl_ctl_reset(port);
594
595 ret = phylink_of_phy_connect(port->slave.phylink, port->slave.phy_node, 0);
596 if (ret)
597 goto error_cleanup;
598
599 /* restore vlan configurations */
600 vlan_for_each(ndev, cpsw_restore_vlans, port);
601
602 phylink_start(port->slave.phylink);
603
604 return 0;
605
606 error_cleanup:
607 am65_cpsw_nuss_ndo_slave_stop(ndev);
608 return ret;
609 }
610
am65_cpsw_nuss_rx_cleanup(void * data,dma_addr_t desc_dma)611 static void am65_cpsw_nuss_rx_cleanup(void *data, dma_addr_t desc_dma)
612 {
613 struct am65_cpsw_rx_chn *rx_chn = data;
614 struct cppi5_host_desc_t *desc_rx;
615 struct sk_buff *skb;
616 dma_addr_t buf_dma;
617 u32 buf_dma_len;
618 void **swdata;
619
620 desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
621 swdata = cppi5_hdesc_get_swdata(desc_rx);
622 skb = *swdata;
623 cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
624 k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
625
626 dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
627 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
628
629 dev_kfree_skb_any(skb);
630 }
631
am65_cpsw_nuss_rx_ts(struct sk_buff * skb,u32 * psdata)632 static void am65_cpsw_nuss_rx_ts(struct sk_buff *skb, u32 *psdata)
633 {
634 struct skb_shared_hwtstamps *ssh;
635 u64 ns;
636
637 ns = ((u64)psdata[1] << 32) | psdata[0];
638
639 ssh = skb_hwtstamps(skb);
640 memset(ssh, 0, sizeof(*ssh));
641 ssh->hwtstamp = ns_to_ktime(ns);
642 }
643
644 /* RX psdata[2] word format - checksum information */
645 #define AM65_CPSW_RX_PSD_CSUM_ADD GENMASK(15, 0)
646 #define AM65_CPSW_RX_PSD_CSUM_ERR BIT(16)
647 #define AM65_CPSW_RX_PSD_IS_FRAGMENT BIT(17)
648 #define AM65_CPSW_RX_PSD_IS_TCP BIT(18)
649 #define AM65_CPSW_RX_PSD_IPV6_VALID BIT(19)
650 #define AM65_CPSW_RX_PSD_IPV4_VALID BIT(20)
651
am65_cpsw_nuss_rx_csum(struct sk_buff * skb,u32 csum_info)652 static void am65_cpsw_nuss_rx_csum(struct sk_buff *skb, u32 csum_info)
653 {
654 /* HW can verify IPv4/IPv6 TCP/UDP packets checksum
655 * csum information provides in psdata[2] word:
656 * AM65_CPSW_RX_PSD_CSUM_ERR bit - indicates csum error
657 * AM65_CPSW_RX_PSD_IPV6_VALID and AM65_CPSW_RX_PSD_IPV4_VALID
658 * bits - indicates IPv4/IPv6 packet
659 * AM65_CPSW_RX_PSD_IS_FRAGMENT bit - indicates fragmented packet
660 * AM65_CPSW_RX_PSD_CSUM_ADD has value 0xFFFF for non fragmented packets
661 * or csum value for fragmented packets if !AM65_CPSW_RX_PSD_CSUM_ERR
662 */
663 skb_checksum_none_assert(skb);
664
665 if (unlikely(!(skb->dev->features & NETIF_F_RXCSUM)))
666 return;
667
668 if ((csum_info & (AM65_CPSW_RX_PSD_IPV6_VALID |
669 AM65_CPSW_RX_PSD_IPV4_VALID)) &&
670 !(csum_info & AM65_CPSW_RX_PSD_CSUM_ERR)) {
671 /* csum for fragmented packets is unsupported */
672 if (!(csum_info & AM65_CPSW_RX_PSD_IS_FRAGMENT))
673 skb->ip_summed = CHECKSUM_UNNECESSARY;
674 }
675 }
676
am65_cpsw_nuss_rx_packets(struct am65_cpsw_common * common,u32 flow_idx)677 static int am65_cpsw_nuss_rx_packets(struct am65_cpsw_common *common,
678 u32 flow_idx)
679 {
680 struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
681 u32 buf_dma_len, pkt_len, port_id = 0, csum_info;
682 struct am65_cpsw_ndev_priv *ndev_priv;
683 struct am65_cpsw_ndev_stats *stats;
684 struct cppi5_host_desc_t *desc_rx;
685 struct device *dev = common->dev;
686 struct sk_buff *skb, *new_skb;
687 dma_addr_t desc_dma, buf_dma;
688 struct am65_cpsw_port *port;
689 struct net_device *ndev;
690 void **swdata;
691 u32 *psdata;
692 int ret = 0;
693
694 ret = k3_udma_glue_pop_rx_chn(rx_chn->rx_chn, flow_idx, &desc_dma);
695 if (ret) {
696 if (ret != -ENODATA)
697 dev_err(dev, "RX: pop chn fail %d\n", ret);
698 return ret;
699 }
700
701 if (cppi5_desc_is_tdcm(desc_dma)) {
702 dev_dbg(dev, "%s RX tdown flow: %u\n", __func__, flow_idx);
703 return 0;
704 }
705
706 desc_rx = k3_cppi_desc_pool_dma2virt(rx_chn->desc_pool, desc_dma);
707 dev_dbg(dev, "%s flow_idx: %u desc %pad\n",
708 __func__, flow_idx, &desc_dma);
709
710 swdata = cppi5_hdesc_get_swdata(desc_rx);
711 skb = *swdata;
712 cppi5_hdesc_get_obuf(desc_rx, &buf_dma, &buf_dma_len);
713 k3_udma_glue_rx_cppi5_to_dma_addr(rx_chn->rx_chn, &buf_dma);
714 pkt_len = cppi5_hdesc_get_pktlen(desc_rx);
715 cppi5_desc_get_tags_ids(&desc_rx->hdr, &port_id, NULL);
716 dev_dbg(dev, "%s rx port_id:%d\n", __func__, port_id);
717 port = am65_common_get_port(common, port_id);
718 ndev = port->ndev;
719 skb->dev = ndev;
720
721 psdata = cppi5_hdesc_get_psdata(desc_rx);
722 /* add RX timestamp */
723 if (port->rx_ts_enabled)
724 am65_cpsw_nuss_rx_ts(skb, psdata);
725 csum_info = psdata[2];
726 dev_dbg(dev, "%s rx csum_info:%#x\n", __func__, csum_info);
727
728 dma_unmap_single(rx_chn->dma_dev, buf_dma, buf_dma_len, DMA_FROM_DEVICE);
729
730 k3_cppi_desc_pool_free(rx_chn->desc_pool, desc_rx);
731
732 new_skb = netdev_alloc_skb_ip_align(ndev, AM65_CPSW_MAX_PACKET_SIZE);
733 if (new_skb) {
734 ndev_priv = netdev_priv(ndev);
735 am65_cpsw_nuss_set_offload_fwd_mark(skb, ndev_priv->offload_fwd_mark);
736 skb_put(skb, pkt_len);
737 skb->protocol = eth_type_trans(skb, ndev);
738 am65_cpsw_nuss_rx_csum(skb, csum_info);
739 napi_gro_receive(&common->napi_rx, skb);
740
741 stats = this_cpu_ptr(ndev_priv->stats);
742
743 u64_stats_update_begin(&stats->syncp);
744 stats->rx_packets++;
745 stats->rx_bytes += pkt_len;
746 u64_stats_update_end(&stats->syncp);
747 kmemleak_not_leak(new_skb);
748 } else {
749 ndev->stats.rx_dropped++;
750 new_skb = skb;
751 }
752
753 if (netif_dormant(ndev)) {
754 dev_kfree_skb_any(new_skb);
755 ndev->stats.rx_dropped++;
756 return 0;
757 }
758
759 ret = am65_cpsw_nuss_rx_push(common, new_skb);
760 if (WARN_ON(ret < 0)) {
761 dev_kfree_skb_any(new_skb);
762 ndev->stats.rx_errors++;
763 ndev->stats.rx_dropped++;
764 }
765
766 return ret;
767 }
768
am65_cpsw_nuss_rx_poll(struct napi_struct * napi_rx,int budget)769 static int am65_cpsw_nuss_rx_poll(struct napi_struct *napi_rx, int budget)
770 {
771 struct am65_cpsw_common *common = am65_cpsw_napi_to_common(napi_rx);
772 int flow = AM65_CPSW_MAX_RX_FLOWS;
773 int cur_budget, ret;
774 int num_rx = 0;
775
776 /* process every flow */
777 while (flow--) {
778 cur_budget = budget - num_rx;
779
780 while (cur_budget--) {
781 ret = am65_cpsw_nuss_rx_packets(common, flow);
782 if (ret)
783 break;
784 num_rx++;
785 }
786
787 if (num_rx >= budget)
788 break;
789 }
790
791 dev_dbg(common->dev, "%s num_rx:%d %d\n", __func__, num_rx, budget);
792
793 if (num_rx < budget && napi_complete_done(napi_rx, num_rx)) {
794 if (common->rx_irq_disabled) {
795 common->rx_irq_disabled = false;
796 enable_irq(common->rx_chns.irq);
797 }
798 }
799
800 return num_rx;
801 }
802
am65_cpsw_nuss_xmit_free(struct am65_cpsw_tx_chn * tx_chn,struct cppi5_host_desc_t * desc)803 static void am65_cpsw_nuss_xmit_free(struct am65_cpsw_tx_chn *tx_chn,
804 struct cppi5_host_desc_t *desc)
805 {
806 struct cppi5_host_desc_t *first_desc, *next_desc;
807 dma_addr_t buf_dma, next_desc_dma;
808 u32 buf_dma_len;
809
810 first_desc = desc;
811 next_desc = first_desc;
812
813 cppi5_hdesc_get_obuf(first_desc, &buf_dma, &buf_dma_len);
814 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
815
816 dma_unmap_single(tx_chn->dma_dev, buf_dma, buf_dma_len, DMA_TO_DEVICE);
817
818 next_desc_dma = cppi5_hdesc_get_next_hbdesc(first_desc);
819 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
820 while (next_desc_dma) {
821 next_desc = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
822 next_desc_dma);
823 cppi5_hdesc_get_obuf(next_desc, &buf_dma, &buf_dma_len);
824 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &buf_dma);
825
826 dma_unmap_page(tx_chn->dma_dev, buf_dma, buf_dma_len,
827 DMA_TO_DEVICE);
828
829 next_desc_dma = cppi5_hdesc_get_next_hbdesc(next_desc);
830 k3_udma_glue_tx_cppi5_to_dma_addr(tx_chn->tx_chn, &next_desc_dma);
831
832 k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
833 }
834
835 k3_cppi_desc_pool_free(tx_chn->desc_pool, first_desc);
836 }
837
am65_cpsw_nuss_tx_cleanup(void * data,dma_addr_t desc_dma)838 static void am65_cpsw_nuss_tx_cleanup(void *data, dma_addr_t desc_dma)
839 {
840 struct am65_cpsw_tx_chn *tx_chn = data;
841 struct cppi5_host_desc_t *desc_tx;
842 struct sk_buff *skb;
843 void **swdata;
844
845 desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool, desc_dma);
846 swdata = cppi5_hdesc_get_swdata(desc_tx);
847 skb = *(swdata);
848 am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
849
850 dev_kfree_skb_any(skb);
851 }
852
853 static struct sk_buff *
am65_cpsw_nuss_tx_compl_packet(struct am65_cpsw_tx_chn * tx_chn,dma_addr_t desc_dma)854 am65_cpsw_nuss_tx_compl_packet(struct am65_cpsw_tx_chn *tx_chn,
855 dma_addr_t desc_dma)
856 {
857 struct am65_cpsw_ndev_priv *ndev_priv;
858 struct am65_cpsw_ndev_stats *stats;
859 struct cppi5_host_desc_t *desc_tx;
860 struct net_device *ndev;
861 struct sk_buff *skb;
862 void **swdata;
863
864 desc_tx = k3_cppi_desc_pool_dma2virt(tx_chn->desc_pool,
865 desc_dma);
866 swdata = cppi5_hdesc_get_swdata(desc_tx);
867 skb = *(swdata);
868 am65_cpsw_nuss_xmit_free(tx_chn, desc_tx);
869
870 ndev = skb->dev;
871
872 am65_cpts_tx_timestamp(tx_chn->common->cpts, skb);
873
874 ndev_priv = netdev_priv(ndev);
875 stats = this_cpu_ptr(ndev_priv->stats);
876 u64_stats_update_begin(&stats->syncp);
877 stats->tx_packets++;
878 stats->tx_bytes += skb->len;
879 u64_stats_update_end(&stats->syncp);
880
881 return skb;
882 }
883
am65_cpsw_nuss_tx_wake(struct am65_cpsw_tx_chn * tx_chn,struct net_device * ndev,struct netdev_queue * netif_txq)884 static void am65_cpsw_nuss_tx_wake(struct am65_cpsw_tx_chn *tx_chn, struct net_device *ndev,
885 struct netdev_queue *netif_txq)
886 {
887 if (netif_tx_queue_stopped(netif_txq)) {
888 /* Check whether the queue is stopped due to stalled
889 * tx dma, if the queue is stopped then wake the queue
890 * as we have free desc for tx
891 */
892 __netif_tx_lock(netif_txq, smp_processor_id());
893 if (netif_running(ndev) &&
894 (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >= MAX_SKB_FRAGS))
895 netif_tx_wake_queue(netif_txq);
896
897 __netif_tx_unlock(netif_txq);
898 }
899 }
900
am65_cpsw_nuss_tx_compl_packets(struct am65_cpsw_common * common,int chn,unsigned int budget)901 static int am65_cpsw_nuss_tx_compl_packets(struct am65_cpsw_common *common,
902 int chn, unsigned int budget)
903 {
904 struct device *dev = common->dev;
905 struct am65_cpsw_tx_chn *tx_chn;
906 struct netdev_queue *netif_txq;
907 unsigned int total_bytes = 0;
908 struct net_device *ndev;
909 struct sk_buff *skb;
910 dma_addr_t desc_dma;
911 int res, num_tx = 0;
912
913 tx_chn = &common->tx_chns[chn];
914
915 while (true) {
916 spin_lock(&tx_chn->lock);
917 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
918 spin_unlock(&tx_chn->lock);
919 if (res == -ENODATA)
920 break;
921
922 if (cppi5_desc_is_tdcm(desc_dma)) {
923 if (atomic_dec_and_test(&common->tdown_cnt))
924 complete(&common->tdown_complete);
925 break;
926 }
927
928 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma);
929 total_bytes = skb->len;
930 ndev = skb->dev;
931 napi_consume_skb(skb, budget);
932 num_tx++;
933
934 netif_txq = netdev_get_tx_queue(ndev, chn);
935
936 netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
937
938 am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq);
939 }
940
941 dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx);
942
943 return num_tx;
944 }
945
am65_cpsw_nuss_tx_compl_packets_2g(struct am65_cpsw_common * common,int chn,unsigned int budget)946 static int am65_cpsw_nuss_tx_compl_packets_2g(struct am65_cpsw_common *common,
947 int chn, unsigned int budget)
948 {
949 struct device *dev = common->dev;
950 struct am65_cpsw_tx_chn *tx_chn;
951 struct netdev_queue *netif_txq;
952 unsigned int total_bytes = 0;
953 struct net_device *ndev;
954 struct sk_buff *skb;
955 dma_addr_t desc_dma;
956 int res, num_tx = 0;
957
958 tx_chn = &common->tx_chns[chn];
959
960 while (true) {
961 res = k3_udma_glue_pop_tx_chn(tx_chn->tx_chn, &desc_dma);
962 if (res == -ENODATA)
963 break;
964
965 if (cppi5_desc_is_tdcm(desc_dma)) {
966 if (atomic_dec_and_test(&common->tdown_cnt))
967 complete(&common->tdown_complete);
968 break;
969 }
970
971 skb = am65_cpsw_nuss_tx_compl_packet(tx_chn, desc_dma);
972
973 ndev = skb->dev;
974 total_bytes += skb->len;
975 napi_consume_skb(skb, budget);
976 num_tx++;
977 }
978
979 if (!num_tx)
980 return 0;
981
982 netif_txq = netdev_get_tx_queue(ndev, chn);
983
984 netdev_tx_completed_queue(netif_txq, num_tx, total_bytes);
985
986 am65_cpsw_nuss_tx_wake(tx_chn, ndev, netif_txq);
987
988 dev_dbg(dev, "%s:%u pkt:%d\n", __func__, chn, num_tx);
989
990 return num_tx;
991 }
992
am65_cpsw_nuss_tx_poll(struct napi_struct * napi_tx,int budget)993 static int am65_cpsw_nuss_tx_poll(struct napi_struct *napi_tx, int budget)
994 {
995 struct am65_cpsw_tx_chn *tx_chn = am65_cpsw_napi_to_tx_chn(napi_tx);
996 int num_tx;
997
998 if (AM65_CPSW_IS_CPSW2G(tx_chn->common))
999 num_tx = am65_cpsw_nuss_tx_compl_packets_2g(tx_chn->common, tx_chn->id, budget);
1000 else
1001 num_tx = am65_cpsw_nuss_tx_compl_packets(tx_chn->common, tx_chn->id, budget);
1002
1003 if (num_tx >= budget)
1004 return budget;
1005
1006 if (napi_complete_done(napi_tx, num_tx))
1007 enable_irq(tx_chn->irq);
1008
1009 return 0;
1010 }
1011
am65_cpsw_nuss_rx_irq(int irq,void * dev_id)1012 static irqreturn_t am65_cpsw_nuss_rx_irq(int irq, void *dev_id)
1013 {
1014 struct am65_cpsw_common *common = dev_id;
1015
1016 common->rx_irq_disabled = true;
1017 disable_irq_nosync(irq);
1018 napi_schedule(&common->napi_rx);
1019
1020 return IRQ_HANDLED;
1021 }
1022
am65_cpsw_nuss_tx_irq(int irq,void * dev_id)1023 static irqreturn_t am65_cpsw_nuss_tx_irq(int irq, void *dev_id)
1024 {
1025 struct am65_cpsw_tx_chn *tx_chn = dev_id;
1026
1027 disable_irq_nosync(irq);
1028 napi_schedule(&tx_chn->napi_tx);
1029
1030 return IRQ_HANDLED;
1031 }
1032
am65_cpsw_nuss_ndo_slave_xmit(struct sk_buff * skb,struct net_device * ndev)1033 static netdev_tx_t am65_cpsw_nuss_ndo_slave_xmit(struct sk_buff *skb,
1034 struct net_device *ndev)
1035 {
1036 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1037 struct cppi5_host_desc_t *first_desc, *next_desc, *cur_desc;
1038 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1039 struct device *dev = common->dev;
1040 struct am65_cpsw_tx_chn *tx_chn;
1041 struct netdev_queue *netif_txq;
1042 dma_addr_t desc_dma, buf_dma;
1043 int ret, q_idx, i;
1044 void **swdata;
1045 u32 *psdata;
1046 u32 pkt_len;
1047
1048 /* padding enabled in hw */
1049 pkt_len = skb_headlen(skb);
1050
1051 /* SKB TX timestamp */
1052 if (port->tx_ts_enabled)
1053 am65_cpts_prep_tx_timestamp(common->cpts, skb);
1054
1055 q_idx = skb_get_queue_mapping(skb);
1056 dev_dbg(dev, "%s skb_queue:%d\n", __func__, q_idx);
1057
1058 tx_chn = &common->tx_chns[q_idx];
1059 netif_txq = netdev_get_tx_queue(ndev, q_idx);
1060
1061 /* Map the linear buffer */
1062 buf_dma = dma_map_single(tx_chn->dma_dev, skb->data, pkt_len,
1063 DMA_TO_DEVICE);
1064 if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) {
1065 dev_err(dev, "Failed to map tx skb buffer\n");
1066 ndev->stats.tx_errors++;
1067 goto err_free_skb;
1068 }
1069
1070 first_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1071 if (!first_desc) {
1072 dev_dbg(dev, "Failed to allocate descriptor\n");
1073 dma_unmap_single(tx_chn->dma_dev, buf_dma, pkt_len,
1074 DMA_TO_DEVICE);
1075 goto busy_stop_q;
1076 }
1077
1078 cppi5_hdesc_init(first_desc, CPPI5_INFO0_HDESC_EPIB_PRESENT,
1079 AM65_CPSW_NAV_PS_DATA_SIZE);
1080 cppi5_desc_set_pktids(&first_desc->hdr, 0, 0x3FFF);
1081 cppi5_hdesc_set_pkttype(first_desc, 0x7);
1082 cppi5_desc_set_tags_ids(&first_desc->hdr, 0, port->port_id);
1083
1084 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
1085 cppi5_hdesc_attach_buf(first_desc, buf_dma, pkt_len, buf_dma, pkt_len);
1086 swdata = cppi5_hdesc_get_swdata(first_desc);
1087 *(swdata) = skb;
1088 psdata = cppi5_hdesc_get_psdata(first_desc);
1089
1090 /* HW csum offload if enabled */
1091 psdata[2] = 0;
1092 if (likely(skb->ip_summed == CHECKSUM_PARTIAL)) {
1093 unsigned int cs_start, cs_offset;
1094
1095 cs_start = skb_transport_offset(skb);
1096 cs_offset = cs_start + skb->csum_offset;
1097 /* HW numerates bytes starting from 1 */
1098 psdata[2] = ((cs_offset + 1) << 24) |
1099 ((cs_start + 1) << 16) | (skb->len - cs_start);
1100 dev_dbg(dev, "%s tx psdata:%#x\n", __func__, psdata[2]);
1101 }
1102
1103 if (!skb_is_nonlinear(skb))
1104 goto done_tx;
1105
1106 dev_dbg(dev, "fragmented SKB\n");
1107
1108 /* Handle the case where skb is fragmented in pages */
1109 cur_desc = first_desc;
1110 for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
1111 skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1112 u32 frag_size = skb_frag_size(frag);
1113
1114 next_desc = k3_cppi_desc_pool_alloc(tx_chn->desc_pool);
1115 if (!next_desc) {
1116 dev_err(dev, "Failed to allocate descriptor\n");
1117 goto busy_free_descs;
1118 }
1119
1120 buf_dma = skb_frag_dma_map(tx_chn->dma_dev, frag, 0, frag_size,
1121 DMA_TO_DEVICE);
1122 if (unlikely(dma_mapping_error(tx_chn->dma_dev, buf_dma))) {
1123 dev_err(dev, "Failed to map tx skb page\n");
1124 k3_cppi_desc_pool_free(tx_chn->desc_pool, next_desc);
1125 ndev->stats.tx_errors++;
1126 goto err_free_descs;
1127 }
1128
1129 cppi5_hdesc_reset_hbdesc(next_desc);
1130 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &buf_dma);
1131 cppi5_hdesc_attach_buf(next_desc,
1132 buf_dma, frag_size, buf_dma, frag_size);
1133
1134 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool,
1135 next_desc);
1136 k3_udma_glue_tx_dma_to_cppi5_addr(tx_chn->tx_chn, &desc_dma);
1137 cppi5_hdesc_link_hbdesc(cur_desc, desc_dma);
1138
1139 pkt_len += frag_size;
1140 cur_desc = next_desc;
1141 }
1142 WARN_ON(pkt_len != skb->len);
1143
1144 done_tx:
1145 skb_tx_timestamp(skb);
1146
1147 /* report bql before sending packet */
1148 netdev_tx_sent_queue(netif_txq, pkt_len);
1149
1150 cppi5_hdesc_set_pktlen(first_desc, pkt_len);
1151 desc_dma = k3_cppi_desc_pool_virt2dma(tx_chn->desc_pool, first_desc);
1152 if (AM65_CPSW_IS_CPSW2G(common)) {
1153 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
1154 } else {
1155 spin_lock_bh(&tx_chn->lock);
1156 ret = k3_udma_glue_push_tx_chn(tx_chn->tx_chn, first_desc, desc_dma);
1157 spin_unlock_bh(&tx_chn->lock);
1158 }
1159 if (ret) {
1160 dev_err(dev, "can't push desc %d\n", ret);
1161 /* inform bql */
1162 netdev_tx_completed_queue(netif_txq, 1, pkt_len);
1163 ndev->stats.tx_errors++;
1164 goto err_free_descs;
1165 }
1166
1167 if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) < MAX_SKB_FRAGS) {
1168 netif_tx_stop_queue(netif_txq);
1169 /* Barrier, so that stop_queue visible to other cpus */
1170 smp_mb__after_atomic();
1171 dev_dbg(dev, "netif_tx_stop_queue %d\n", q_idx);
1172
1173 /* re-check for smp */
1174 if (k3_cppi_desc_pool_avail(tx_chn->desc_pool) >=
1175 MAX_SKB_FRAGS) {
1176 netif_tx_wake_queue(netif_txq);
1177 dev_dbg(dev, "netif_tx_wake_queue %d\n", q_idx);
1178 }
1179 }
1180
1181 return NETDEV_TX_OK;
1182
1183 err_free_descs:
1184 am65_cpsw_nuss_xmit_free(tx_chn, first_desc);
1185 err_free_skb:
1186 ndev->stats.tx_dropped++;
1187 dev_kfree_skb_any(skb);
1188 return NETDEV_TX_OK;
1189
1190 busy_free_descs:
1191 am65_cpsw_nuss_xmit_free(tx_chn, first_desc);
1192 busy_stop_q:
1193 netif_tx_stop_queue(netif_txq);
1194 return NETDEV_TX_BUSY;
1195 }
1196
am65_cpsw_nuss_ndo_slave_set_mac_address(struct net_device * ndev,void * addr)1197 static int am65_cpsw_nuss_ndo_slave_set_mac_address(struct net_device *ndev,
1198 void *addr)
1199 {
1200 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1201 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1202 struct sockaddr *sockaddr = (struct sockaddr *)addr;
1203 int ret;
1204
1205 ret = eth_prepare_mac_addr_change(ndev, addr);
1206 if (ret < 0)
1207 return ret;
1208
1209 ret = pm_runtime_resume_and_get(common->dev);
1210 if (ret < 0)
1211 return ret;
1212
1213 cpsw_ale_del_ucast(common->ale, ndev->dev_addr,
1214 HOST_PORT_NUM, 0, 0);
1215 cpsw_ale_add_ucast(common->ale, sockaddr->sa_data,
1216 HOST_PORT_NUM, ALE_SECURE, 0);
1217
1218 am65_cpsw_port_set_sl_mac(port, addr);
1219 eth_commit_mac_addr_change(ndev, sockaddr);
1220
1221 pm_runtime_put(common->dev);
1222
1223 return 0;
1224 }
1225
am65_cpsw_nuss_hwtstamp_set(struct net_device * ndev,struct ifreq * ifr)1226 static int am65_cpsw_nuss_hwtstamp_set(struct net_device *ndev,
1227 struct ifreq *ifr)
1228 {
1229 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
1230 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1231 u32 ts_ctrl, seq_id, ts_ctrl_ltype2, ts_vlan_ltype;
1232 struct hwtstamp_config cfg;
1233
1234 if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1235 return -EOPNOTSUPP;
1236
1237 if (copy_from_user(&cfg, ifr->ifr_data, sizeof(cfg)))
1238 return -EFAULT;
1239
1240 /* TX HW timestamp */
1241 switch (cfg.tx_type) {
1242 case HWTSTAMP_TX_OFF:
1243 case HWTSTAMP_TX_ON:
1244 break;
1245 default:
1246 return -ERANGE;
1247 }
1248
1249 switch (cfg.rx_filter) {
1250 case HWTSTAMP_FILTER_NONE:
1251 port->rx_ts_enabled = false;
1252 break;
1253 case HWTSTAMP_FILTER_ALL:
1254 case HWTSTAMP_FILTER_SOME:
1255 case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
1256 case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
1257 case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
1258 case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
1259 case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
1260 case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
1261 case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
1262 case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
1263 case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
1264 case HWTSTAMP_FILTER_PTP_V2_EVENT:
1265 case HWTSTAMP_FILTER_PTP_V2_SYNC:
1266 case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
1267 case HWTSTAMP_FILTER_NTP_ALL:
1268 port->rx_ts_enabled = true;
1269 cfg.rx_filter = HWTSTAMP_FILTER_ALL;
1270 break;
1271 default:
1272 return -ERANGE;
1273 }
1274
1275 port->tx_ts_enabled = (cfg.tx_type == HWTSTAMP_TX_ON);
1276
1277 /* cfg TX timestamp */
1278 seq_id = (AM65_CPSW_TS_SEQ_ID_OFFSET <<
1279 AM65_CPSW_PN_TS_SEQ_ID_OFFSET_SHIFT) | ETH_P_1588;
1280
1281 ts_vlan_ltype = ETH_P_8021Q;
1282
1283 ts_ctrl_ltype2 = ETH_P_1588 |
1284 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_107 |
1285 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_129 |
1286 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_130 |
1287 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_131 |
1288 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_132 |
1289 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_319 |
1290 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_320 |
1291 AM65_CPSW_PN_TS_CTL_LTYPE2_TS_TTL_NONZERO;
1292
1293 ts_ctrl = AM65_CPSW_TS_EVENT_MSG_TYPE_BITS <<
1294 AM65_CPSW_PN_TS_CTL_MSG_TYPE_EN_SHIFT;
1295
1296 if (port->tx_ts_enabled)
1297 ts_ctrl |= AM65_CPSW_TS_TX_ANX_ALL_EN |
1298 AM65_CPSW_PN_TS_CTL_TX_VLAN_LT1_EN;
1299
1300 writel(seq_id, port->port_base + AM65_CPSW_PORTN_REG_TS_SEQ_LTYPE_REG);
1301 writel(ts_vlan_ltype, port->port_base +
1302 AM65_CPSW_PORTN_REG_TS_VLAN_LTYPE_REG);
1303 writel(ts_ctrl_ltype2, port->port_base +
1304 AM65_CPSW_PORTN_REG_TS_CTL_LTYPE2);
1305 writel(ts_ctrl, port->port_base + AM65_CPSW_PORTN_REG_TS_CTL);
1306
1307 /* en/dis RX timestamp */
1308 am65_cpts_rx_enable(common->cpts, port->rx_ts_enabled);
1309
1310 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1311 }
1312
am65_cpsw_nuss_hwtstamp_get(struct net_device * ndev,struct ifreq * ifr)1313 static int am65_cpsw_nuss_hwtstamp_get(struct net_device *ndev,
1314 struct ifreq *ifr)
1315 {
1316 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1317 struct hwtstamp_config cfg;
1318
1319 if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1320 return -EOPNOTSUPP;
1321
1322 cfg.flags = 0;
1323 cfg.tx_type = port->tx_ts_enabled ?
1324 HWTSTAMP_TX_ON : HWTSTAMP_TX_OFF;
1325 cfg.rx_filter = port->rx_ts_enabled ?
1326 HWTSTAMP_FILTER_ALL : HWTSTAMP_FILTER_NONE;
1327
1328 return copy_to_user(ifr->ifr_data, &cfg, sizeof(cfg)) ? -EFAULT : 0;
1329 }
1330
am65_cpsw_nuss_ndo_slave_ioctl(struct net_device * ndev,struct ifreq * req,int cmd)1331 static int am65_cpsw_nuss_ndo_slave_ioctl(struct net_device *ndev,
1332 struct ifreq *req, int cmd)
1333 {
1334 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1335
1336 if (!netif_running(ndev))
1337 return -EINVAL;
1338
1339 switch (cmd) {
1340 case SIOCSHWTSTAMP:
1341 return am65_cpsw_nuss_hwtstamp_set(ndev, req);
1342 case SIOCGHWTSTAMP:
1343 return am65_cpsw_nuss_hwtstamp_get(ndev, req);
1344 }
1345
1346 return phylink_mii_ioctl(port->slave.phylink, req, cmd);
1347 }
1348
am65_cpsw_nuss_ndo_get_stats(struct net_device * dev,struct rtnl_link_stats64 * stats)1349 static void am65_cpsw_nuss_ndo_get_stats(struct net_device *dev,
1350 struct rtnl_link_stats64 *stats)
1351 {
1352 struct am65_cpsw_ndev_priv *ndev_priv = netdev_priv(dev);
1353 unsigned int start;
1354 int cpu;
1355
1356 for_each_possible_cpu(cpu) {
1357 struct am65_cpsw_ndev_stats *cpu_stats;
1358 u64 rx_packets;
1359 u64 rx_bytes;
1360 u64 tx_packets;
1361 u64 tx_bytes;
1362
1363 cpu_stats = per_cpu_ptr(ndev_priv->stats, cpu);
1364 do {
1365 start = u64_stats_fetch_begin_irq(&cpu_stats->syncp);
1366 rx_packets = cpu_stats->rx_packets;
1367 rx_bytes = cpu_stats->rx_bytes;
1368 tx_packets = cpu_stats->tx_packets;
1369 tx_bytes = cpu_stats->tx_bytes;
1370 } while (u64_stats_fetch_retry_irq(&cpu_stats->syncp, start));
1371
1372 stats->rx_packets += rx_packets;
1373 stats->rx_bytes += rx_bytes;
1374 stats->tx_packets += tx_packets;
1375 stats->tx_bytes += tx_bytes;
1376 }
1377
1378 stats->rx_errors = dev->stats.rx_errors;
1379 stats->rx_dropped = dev->stats.rx_dropped;
1380 stats->tx_dropped = dev->stats.tx_dropped;
1381 }
1382
am65_cpsw_ndo_get_devlink_port(struct net_device * ndev)1383 static struct devlink_port *am65_cpsw_ndo_get_devlink_port(struct net_device *ndev)
1384 {
1385 struct am65_cpsw_port *port = am65_ndev_to_port(ndev);
1386
1387 return &port->devlink_port;
1388 }
1389
1390 static const struct net_device_ops am65_cpsw_nuss_netdev_ops = {
1391 .ndo_open = am65_cpsw_nuss_ndo_slave_open,
1392 .ndo_stop = am65_cpsw_nuss_ndo_slave_stop,
1393 .ndo_start_xmit = am65_cpsw_nuss_ndo_slave_xmit,
1394 .ndo_set_rx_mode = am65_cpsw_nuss_ndo_slave_set_rx_mode,
1395 .ndo_get_stats64 = am65_cpsw_nuss_ndo_get_stats,
1396 .ndo_validate_addr = eth_validate_addr,
1397 .ndo_set_mac_address = am65_cpsw_nuss_ndo_slave_set_mac_address,
1398 .ndo_tx_timeout = am65_cpsw_nuss_ndo_host_tx_timeout,
1399 .ndo_vlan_rx_add_vid = am65_cpsw_nuss_ndo_slave_add_vid,
1400 .ndo_vlan_rx_kill_vid = am65_cpsw_nuss_ndo_slave_kill_vid,
1401 .ndo_eth_ioctl = am65_cpsw_nuss_ndo_slave_ioctl,
1402 .ndo_setup_tc = am65_cpsw_qos_ndo_setup_tc,
1403 .ndo_get_devlink_port = am65_cpsw_ndo_get_devlink_port,
1404 };
1405
am65_cpsw_nuss_mac_config(struct phylink_config * config,unsigned int mode,const struct phylink_link_state * state)1406 static void am65_cpsw_nuss_mac_config(struct phylink_config *config, unsigned int mode,
1407 const struct phylink_link_state *state)
1408 {
1409 struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data,
1410 phylink_config);
1411 struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave);
1412 struct am65_cpsw_common *common = port->common;
1413
1414 if (common->pdata.extra_modes & BIT(state->interface))
1415 writel(AM65_CPSW_SGMII_CONTROL_MR_AN_ENABLE,
1416 port->sgmii_base + AM65_CPSW_SGMII_CONTROL_REG);
1417 }
1418
am65_cpsw_nuss_mac_link_down(struct phylink_config * config,unsigned int mode,phy_interface_t interface)1419 static void am65_cpsw_nuss_mac_link_down(struct phylink_config *config, unsigned int mode,
1420 phy_interface_t interface)
1421 {
1422 struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data,
1423 phylink_config);
1424 struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave);
1425 struct am65_cpsw_common *common = port->common;
1426 struct net_device *ndev = port->ndev;
1427 int tmo;
1428
1429 /* disable forwarding */
1430 cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1431
1432 cpsw_sl_ctl_set(port->slave.mac_sl, CPSW_SL_CTL_CMD_IDLE);
1433
1434 tmo = cpsw_sl_wait_for_idle(port->slave.mac_sl, 100);
1435 dev_dbg(common->dev, "down msc_sl %08x tmo %d\n",
1436 cpsw_sl_reg_read(port->slave.mac_sl, CPSW_SL_MACSTATUS), tmo);
1437
1438 cpsw_sl_ctl_reset(port->slave.mac_sl);
1439
1440 am65_cpsw_qos_link_down(ndev);
1441 netif_tx_stop_all_queues(ndev);
1442 }
1443
am65_cpsw_nuss_mac_link_up(struct phylink_config * config,struct phy_device * phy,unsigned int mode,phy_interface_t interface,int speed,int duplex,bool tx_pause,bool rx_pause)1444 static void am65_cpsw_nuss_mac_link_up(struct phylink_config *config, struct phy_device *phy,
1445 unsigned int mode, phy_interface_t interface, int speed,
1446 int duplex, bool tx_pause, bool rx_pause)
1447 {
1448 struct am65_cpsw_slave_data *slave = container_of(config, struct am65_cpsw_slave_data,
1449 phylink_config);
1450 struct am65_cpsw_port *port = container_of(slave, struct am65_cpsw_port, slave);
1451 struct am65_cpsw_common *common = port->common;
1452 u32 mac_control = CPSW_SL_CTL_GMII_EN;
1453 struct net_device *ndev = port->ndev;
1454
1455 if (speed == SPEED_1000)
1456 mac_control |= CPSW_SL_CTL_GIG;
1457 if (speed == SPEED_10 && phy_interface_mode_is_rgmii(interface))
1458 /* Can be used with in band mode only */
1459 mac_control |= CPSW_SL_CTL_EXT_EN;
1460 if (speed == SPEED_100 && interface == PHY_INTERFACE_MODE_RMII)
1461 mac_control |= CPSW_SL_CTL_IFCTL_A;
1462 if (duplex)
1463 mac_control |= CPSW_SL_CTL_FULLDUPLEX;
1464
1465 /* rx_pause/tx_pause */
1466 if (rx_pause)
1467 mac_control |= CPSW_SL_CTL_RX_FLOW_EN;
1468
1469 if (tx_pause)
1470 mac_control |= CPSW_SL_CTL_TX_FLOW_EN;
1471
1472 cpsw_sl_ctl_set(port->slave.mac_sl, mac_control);
1473
1474 /* enable forwarding */
1475 cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_STATE, ALE_PORT_STATE_FORWARD);
1476
1477 am65_cpsw_qos_link_up(ndev, speed);
1478 netif_tx_wake_all_queues(ndev);
1479 }
1480
1481 static const struct phylink_mac_ops am65_cpsw_phylink_mac_ops = {
1482 .validate = phylink_generic_validate,
1483 .mac_config = am65_cpsw_nuss_mac_config,
1484 .mac_link_down = am65_cpsw_nuss_mac_link_down,
1485 .mac_link_up = am65_cpsw_nuss_mac_link_up,
1486 };
1487
am65_cpsw_nuss_slave_disable_unused(struct am65_cpsw_port * port)1488 static void am65_cpsw_nuss_slave_disable_unused(struct am65_cpsw_port *port)
1489 {
1490 struct am65_cpsw_common *common = port->common;
1491
1492 if (!port->disabled)
1493 return;
1494
1495 cpsw_ale_control_set(common->ale, port->port_id,
1496 ALE_PORT_STATE, ALE_PORT_STATE_DISABLE);
1497
1498 cpsw_sl_reset(port->slave.mac_sl, 100);
1499 cpsw_sl_ctl_reset(port->slave.mac_sl);
1500 }
1501
am65_cpsw_nuss_free_tx_chns(void * data)1502 static void am65_cpsw_nuss_free_tx_chns(void *data)
1503 {
1504 struct am65_cpsw_common *common = data;
1505 int i;
1506
1507 for (i = 0; i < common->tx_ch_num; i++) {
1508 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1509
1510 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1511 k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1512
1513 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1514 k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1515
1516 memset(tx_chn, 0, sizeof(*tx_chn));
1517 }
1518 }
1519
am65_cpsw_nuss_remove_tx_chns(struct am65_cpsw_common * common)1520 void am65_cpsw_nuss_remove_tx_chns(struct am65_cpsw_common *common)
1521 {
1522 struct device *dev = common->dev;
1523 int i;
1524
1525 devm_remove_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1526
1527 for (i = 0; i < common->tx_ch_num; i++) {
1528 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1529
1530 if (tx_chn->irq)
1531 devm_free_irq(dev, tx_chn->irq, tx_chn);
1532
1533 netif_napi_del(&tx_chn->napi_tx);
1534
1535 if (!IS_ERR_OR_NULL(tx_chn->desc_pool))
1536 k3_cppi_desc_pool_destroy(tx_chn->desc_pool);
1537
1538 if (!IS_ERR_OR_NULL(tx_chn->tx_chn))
1539 k3_udma_glue_release_tx_chn(tx_chn->tx_chn);
1540
1541 memset(tx_chn, 0, sizeof(*tx_chn));
1542 }
1543 }
1544
am65_cpsw_nuss_init_tx_chns(struct am65_cpsw_common * common)1545 static int am65_cpsw_nuss_init_tx_chns(struct am65_cpsw_common *common)
1546 {
1547 u32 max_desc_num = ALIGN(AM65_CPSW_MAX_TX_DESC, MAX_SKB_FRAGS);
1548 struct k3_udma_glue_tx_channel_cfg tx_cfg = { 0 };
1549 struct device *dev = common->dev;
1550 struct k3_ring_cfg ring_cfg = {
1551 .elm_size = K3_RINGACC_RING_ELSIZE_8,
1552 .mode = K3_RINGACC_RING_MODE_RING,
1553 .flags = 0
1554 };
1555 u32 hdesc_size;
1556 int i, ret = 0;
1557
1558 hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1559 AM65_CPSW_NAV_SW_DATA_SIZE);
1560
1561 tx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1562 tx_cfg.tx_cfg = ring_cfg;
1563 tx_cfg.txcq_cfg = ring_cfg;
1564 tx_cfg.tx_cfg.size = max_desc_num;
1565 tx_cfg.txcq_cfg.size = max_desc_num;
1566
1567 for (i = 0; i < common->tx_ch_num; i++) {
1568 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
1569
1570 snprintf(tx_chn->tx_chn_name,
1571 sizeof(tx_chn->tx_chn_name), "tx%d", i);
1572
1573 spin_lock_init(&tx_chn->lock);
1574 tx_chn->common = common;
1575 tx_chn->id = i;
1576 tx_chn->descs_num = max_desc_num;
1577
1578 tx_chn->tx_chn =
1579 k3_udma_glue_request_tx_chn(dev,
1580 tx_chn->tx_chn_name,
1581 &tx_cfg);
1582 if (IS_ERR(tx_chn->tx_chn)) {
1583 ret = dev_err_probe(dev, PTR_ERR(tx_chn->tx_chn),
1584 "Failed to request tx dma channel\n");
1585 goto err;
1586 }
1587 tx_chn->dma_dev = k3_udma_glue_tx_get_dma_device(tx_chn->tx_chn);
1588
1589 tx_chn->desc_pool = k3_cppi_desc_pool_create_name(tx_chn->dma_dev,
1590 tx_chn->descs_num,
1591 hdesc_size,
1592 tx_chn->tx_chn_name);
1593 if (IS_ERR(tx_chn->desc_pool)) {
1594 ret = PTR_ERR(tx_chn->desc_pool);
1595 dev_err(dev, "Failed to create poll %d\n", ret);
1596 goto err;
1597 }
1598
1599 tx_chn->irq = k3_udma_glue_tx_get_irq(tx_chn->tx_chn);
1600 if (tx_chn->irq <= 0) {
1601 dev_err(dev, "Failed to get tx dma irq %d\n",
1602 tx_chn->irq);
1603 goto err;
1604 }
1605
1606 snprintf(tx_chn->tx_chn_name,
1607 sizeof(tx_chn->tx_chn_name), "%s-tx%d",
1608 dev_name(dev), tx_chn->id);
1609 }
1610
1611 err:
1612 i = devm_add_action(dev, am65_cpsw_nuss_free_tx_chns, common);
1613 if (i) {
1614 dev_err(dev, "Failed to add free_tx_chns action %d\n", i);
1615 return i;
1616 }
1617
1618 return ret;
1619 }
1620
am65_cpsw_nuss_free_rx_chns(void * data)1621 static void am65_cpsw_nuss_free_rx_chns(void *data)
1622 {
1623 struct am65_cpsw_common *common = data;
1624 struct am65_cpsw_rx_chn *rx_chn;
1625
1626 rx_chn = &common->rx_chns;
1627
1628 if (!IS_ERR_OR_NULL(rx_chn->desc_pool))
1629 k3_cppi_desc_pool_destroy(rx_chn->desc_pool);
1630
1631 if (!IS_ERR_OR_NULL(rx_chn->rx_chn))
1632 k3_udma_glue_release_rx_chn(rx_chn->rx_chn);
1633 }
1634
am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common * common)1635 static int am65_cpsw_nuss_init_rx_chns(struct am65_cpsw_common *common)
1636 {
1637 struct am65_cpsw_rx_chn *rx_chn = &common->rx_chns;
1638 struct k3_udma_glue_rx_channel_cfg rx_cfg = { 0 };
1639 u32 max_desc_num = AM65_CPSW_MAX_RX_DESC;
1640 struct device *dev = common->dev;
1641 u32 hdesc_size;
1642 u32 fdqring_id;
1643 int i, ret = 0;
1644
1645 hdesc_size = cppi5_hdesc_calc_size(true, AM65_CPSW_NAV_PS_DATA_SIZE,
1646 AM65_CPSW_NAV_SW_DATA_SIZE);
1647
1648 rx_cfg.swdata_size = AM65_CPSW_NAV_SW_DATA_SIZE;
1649 rx_cfg.flow_id_num = AM65_CPSW_MAX_RX_FLOWS;
1650 rx_cfg.flow_id_base = common->rx_flow_id_base;
1651
1652 /* init all flows */
1653 rx_chn->dev = dev;
1654 rx_chn->descs_num = max_desc_num;
1655
1656 rx_chn->rx_chn = k3_udma_glue_request_rx_chn(dev, "rx", &rx_cfg);
1657 if (IS_ERR(rx_chn->rx_chn)) {
1658 ret = dev_err_probe(dev, PTR_ERR(rx_chn->rx_chn),
1659 "Failed to request rx dma channel\n");
1660 goto err;
1661 }
1662 rx_chn->dma_dev = k3_udma_glue_rx_get_dma_device(rx_chn->rx_chn);
1663
1664 rx_chn->desc_pool = k3_cppi_desc_pool_create_name(rx_chn->dma_dev,
1665 rx_chn->descs_num,
1666 hdesc_size, "rx");
1667 if (IS_ERR(rx_chn->desc_pool)) {
1668 ret = PTR_ERR(rx_chn->desc_pool);
1669 dev_err(dev, "Failed to create rx poll %d\n", ret);
1670 goto err;
1671 }
1672
1673 common->rx_flow_id_base =
1674 k3_udma_glue_rx_get_flow_id_base(rx_chn->rx_chn);
1675 dev_info(dev, "set new flow-id-base %u\n", common->rx_flow_id_base);
1676
1677 fdqring_id = K3_RINGACC_RING_ID_ANY;
1678 for (i = 0; i < rx_cfg.flow_id_num; i++) {
1679 struct k3_ring_cfg rxring_cfg = {
1680 .elm_size = K3_RINGACC_RING_ELSIZE_8,
1681 .mode = K3_RINGACC_RING_MODE_RING,
1682 .flags = 0,
1683 };
1684 struct k3_ring_cfg fdqring_cfg = {
1685 .elm_size = K3_RINGACC_RING_ELSIZE_8,
1686 .flags = K3_RINGACC_RING_SHARED,
1687 };
1688 struct k3_udma_glue_rx_flow_cfg rx_flow_cfg = {
1689 .rx_cfg = rxring_cfg,
1690 .rxfdq_cfg = fdqring_cfg,
1691 .ring_rxq_id = K3_RINGACC_RING_ID_ANY,
1692 .src_tag_lo_sel =
1693 K3_UDMA_GLUE_SRC_TAG_LO_USE_REMOTE_SRC_TAG,
1694 };
1695
1696 rx_flow_cfg.ring_rxfdq0_id = fdqring_id;
1697 rx_flow_cfg.rx_cfg.size = max_desc_num;
1698 rx_flow_cfg.rxfdq_cfg.size = max_desc_num;
1699 rx_flow_cfg.rxfdq_cfg.mode = common->pdata.fdqring_mode;
1700
1701 ret = k3_udma_glue_rx_flow_init(rx_chn->rx_chn,
1702 i, &rx_flow_cfg);
1703 if (ret) {
1704 dev_err(dev, "Failed to init rx flow%d %d\n", i, ret);
1705 goto err;
1706 }
1707 if (!i)
1708 fdqring_id =
1709 k3_udma_glue_rx_flow_get_fdq_id(rx_chn->rx_chn,
1710 i);
1711
1712 rx_chn->irq = k3_udma_glue_rx_get_irq(rx_chn->rx_chn, i);
1713
1714 if (rx_chn->irq <= 0) {
1715 dev_err(dev, "Failed to get rx dma irq %d\n",
1716 rx_chn->irq);
1717 ret = -ENXIO;
1718 goto err;
1719 }
1720 }
1721
1722 err:
1723 i = devm_add_action(dev, am65_cpsw_nuss_free_rx_chns, common);
1724 if (i) {
1725 dev_err(dev, "Failed to add free_rx_chns action %d\n", i);
1726 return i;
1727 }
1728
1729 return ret;
1730 }
1731
am65_cpsw_nuss_init_host_p(struct am65_cpsw_common * common)1732 static int am65_cpsw_nuss_init_host_p(struct am65_cpsw_common *common)
1733 {
1734 struct am65_cpsw_host *host_p = am65_common_get_host(common);
1735
1736 host_p->common = common;
1737 host_p->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE;
1738 host_p->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE;
1739
1740 return 0;
1741 }
1742
am65_cpsw_am654_get_efuse_macid(struct device_node * of_node,int slave,u8 * mac_addr)1743 static int am65_cpsw_am654_get_efuse_macid(struct device_node *of_node,
1744 int slave, u8 *mac_addr)
1745 {
1746 u32 mac_lo, mac_hi, offset;
1747 struct regmap *syscon;
1748 int ret;
1749
1750 syscon = syscon_regmap_lookup_by_phandle(of_node, "ti,syscon-efuse");
1751 if (IS_ERR(syscon)) {
1752 if (PTR_ERR(syscon) == -ENODEV)
1753 return 0;
1754 return PTR_ERR(syscon);
1755 }
1756
1757 ret = of_property_read_u32_index(of_node, "ti,syscon-efuse", 1,
1758 &offset);
1759 if (ret)
1760 return ret;
1761
1762 regmap_read(syscon, offset, &mac_lo);
1763 regmap_read(syscon, offset + 4, &mac_hi);
1764
1765 mac_addr[0] = (mac_hi >> 8) & 0xff;
1766 mac_addr[1] = mac_hi & 0xff;
1767 mac_addr[2] = (mac_lo >> 24) & 0xff;
1768 mac_addr[3] = (mac_lo >> 16) & 0xff;
1769 mac_addr[4] = (mac_lo >> 8) & 0xff;
1770 mac_addr[5] = mac_lo & 0xff;
1771
1772 return 0;
1773 }
1774
am65_cpsw_init_cpts(struct am65_cpsw_common * common)1775 static int am65_cpsw_init_cpts(struct am65_cpsw_common *common)
1776 {
1777 struct device *dev = common->dev;
1778 struct device_node *node;
1779 struct am65_cpts *cpts;
1780 void __iomem *reg_base;
1781
1782 if (!IS_ENABLED(CONFIG_TI_K3_AM65_CPTS))
1783 return 0;
1784
1785 node = of_get_child_by_name(dev->of_node, "cpts");
1786 if (!node) {
1787 dev_err(dev, "%s cpts not found\n", __func__);
1788 return -ENOENT;
1789 }
1790
1791 reg_base = common->cpsw_base + AM65_CPSW_NU_CPTS_BASE;
1792 cpts = am65_cpts_create(dev, reg_base, node);
1793 if (IS_ERR(cpts)) {
1794 int ret = PTR_ERR(cpts);
1795
1796 of_node_put(node);
1797 if (ret == -EOPNOTSUPP) {
1798 dev_info(dev, "cpts disabled\n");
1799 return 0;
1800 }
1801
1802 dev_err(dev, "cpts create err %d\n", ret);
1803 return ret;
1804 }
1805 common->cpts = cpts;
1806 /* Forbid PM runtime if CPTS is running.
1807 * K3 CPSWxG modules may completely lose context during ON->OFF
1808 * transitions depending on integration.
1809 * AM65x/J721E MCU CPSW2G: false
1810 * J721E MAIN_CPSW9G: true
1811 */
1812 pm_runtime_forbid(dev);
1813
1814 return 0;
1815 }
1816
am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common * common)1817 static int am65_cpsw_nuss_init_slave_ports(struct am65_cpsw_common *common)
1818 {
1819 struct device_node *node, *port_np;
1820 struct device *dev = common->dev;
1821 int ret;
1822
1823 node = of_get_child_by_name(dev->of_node, "ethernet-ports");
1824 if (!node)
1825 return -ENOENT;
1826
1827 for_each_child_of_node(node, port_np) {
1828 struct am65_cpsw_port *port;
1829 u32 port_id;
1830
1831 /* it is not a slave port node, continue */
1832 if (strcmp(port_np->name, "port"))
1833 continue;
1834
1835 ret = of_property_read_u32(port_np, "reg", &port_id);
1836 if (ret < 0) {
1837 dev_err(dev, "%pOF error reading port_id %d\n",
1838 port_np, ret);
1839 goto of_node_put;
1840 }
1841
1842 if (!port_id || port_id > common->port_num) {
1843 dev_err(dev, "%pOF has invalid port_id %u %s\n",
1844 port_np, port_id, port_np->name);
1845 ret = -EINVAL;
1846 goto of_node_put;
1847 }
1848
1849 port = am65_common_get_port(common, port_id);
1850 port->port_id = port_id;
1851 port->common = common;
1852 port->port_base = common->cpsw_base + AM65_CPSW_NU_PORTS_BASE +
1853 AM65_CPSW_NU_PORTS_OFFSET * (port_id);
1854 if (common->pdata.extra_modes)
1855 port->sgmii_base = common->ss_base + AM65_CPSW_SGMII_BASE * (port_id);
1856 port->stat_base = common->cpsw_base + AM65_CPSW_NU_STATS_BASE +
1857 (AM65_CPSW_NU_STATS_PORT_OFFSET * port_id);
1858 port->name = of_get_property(port_np, "label", NULL);
1859 port->fetch_ram_base =
1860 common->cpsw_base + AM65_CPSW_NU_FRAM_BASE +
1861 (AM65_CPSW_NU_FRAM_PORT_OFFSET * (port_id - 1));
1862
1863 port->slave.mac_sl = cpsw_sl_get("am65", dev, port->port_base);
1864 if (IS_ERR(port->slave.mac_sl)) {
1865 ret = PTR_ERR(port->slave.mac_sl);
1866 goto of_node_put;
1867 }
1868
1869 port->disabled = !of_device_is_available(port_np);
1870 if (port->disabled) {
1871 common->disabled_ports_mask |= BIT(port->port_id);
1872 continue;
1873 }
1874
1875 port->slave.ifphy = devm_of_phy_get(dev, port_np, NULL);
1876 if (IS_ERR(port->slave.ifphy)) {
1877 ret = PTR_ERR(port->slave.ifphy);
1878 dev_err(dev, "%pOF error retrieving port phy: %d\n",
1879 port_np, ret);
1880 goto of_node_put;
1881 }
1882
1883 port->slave.mac_only =
1884 of_property_read_bool(port_np, "ti,mac-only");
1885
1886 /* get phy/link info */
1887 port->slave.phy_node = port_np;
1888 ret = of_get_phy_mode(port_np, &port->slave.phy_if);
1889 if (ret) {
1890 dev_err(dev, "%pOF read phy-mode err %d\n",
1891 port_np, ret);
1892 goto of_node_put;
1893 }
1894
1895 ret = phy_set_mode_ext(port->slave.ifphy, PHY_MODE_ETHERNET, port->slave.phy_if);
1896 if (ret)
1897 goto of_node_put;
1898
1899 ret = of_get_mac_address(port_np, port->slave.mac_addr);
1900 if (ret) {
1901 am65_cpsw_am654_get_efuse_macid(port_np,
1902 port->port_id,
1903 port->slave.mac_addr);
1904 if (!is_valid_ether_addr(port->slave.mac_addr)) {
1905 eth_random_addr(port->slave.mac_addr);
1906 dev_err(dev, "Use random MAC address\n");
1907 }
1908 }
1909 }
1910 of_node_put(node);
1911
1912 /* is there at least one ext.port */
1913 if (!(~common->disabled_ports_mask & GENMASK(common->port_num, 1))) {
1914 dev_err(dev, "No Ext. port are available\n");
1915 return -ENODEV;
1916 }
1917
1918 return 0;
1919
1920 of_node_put:
1921 of_node_put(port_np);
1922 of_node_put(node);
1923 return ret;
1924 }
1925
am65_cpsw_pcpu_stats_free(void * data)1926 static void am65_cpsw_pcpu_stats_free(void *data)
1927 {
1928 struct am65_cpsw_ndev_stats __percpu *stats = data;
1929
1930 free_percpu(stats);
1931 }
1932
am65_cpsw_nuss_phylink_cleanup(struct am65_cpsw_common * common)1933 static void am65_cpsw_nuss_phylink_cleanup(struct am65_cpsw_common *common)
1934 {
1935 struct am65_cpsw_port *port;
1936 int i;
1937
1938 for (i = 0; i < common->port_num; i++) {
1939 port = &common->ports[i];
1940 if (port->slave.phylink)
1941 phylink_destroy(port->slave.phylink);
1942 }
1943 }
1944
1945 static int
am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common * common,u32 port_idx)1946 am65_cpsw_nuss_init_port_ndev(struct am65_cpsw_common *common, u32 port_idx)
1947 {
1948 struct am65_cpsw_ndev_priv *ndev_priv;
1949 struct device *dev = common->dev;
1950 struct am65_cpsw_port *port;
1951 struct phylink *phylink;
1952 int ret;
1953
1954 port = &common->ports[port_idx];
1955
1956 if (port->disabled)
1957 return 0;
1958
1959 /* alloc netdev */
1960 port->ndev = devm_alloc_etherdev_mqs(common->dev,
1961 sizeof(struct am65_cpsw_ndev_priv),
1962 AM65_CPSW_MAX_TX_QUEUES,
1963 AM65_CPSW_MAX_RX_QUEUES);
1964 if (!port->ndev) {
1965 dev_err(dev, "error allocating slave net_device %u\n",
1966 port->port_id);
1967 return -ENOMEM;
1968 }
1969
1970 ndev_priv = netdev_priv(port->ndev);
1971 ndev_priv->port = port;
1972 ndev_priv->msg_enable = AM65_CPSW_DEBUG;
1973 SET_NETDEV_DEV(port->ndev, dev);
1974
1975 eth_hw_addr_set(port->ndev, port->slave.mac_addr);
1976
1977 port->ndev->min_mtu = AM65_CPSW_MIN_PACKET_SIZE;
1978 port->ndev->max_mtu = AM65_CPSW_MAX_PACKET_SIZE;
1979 port->ndev->hw_features = NETIF_F_SG |
1980 NETIF_F_RXCSUM |
1981 NETIF_F_HW_CSUM |
1982 NETIF_F_HW_TC;
1983 port->ndev->features = port->ndev->hw_features |
1984 NETIF_F_HW_VLAN_CTAG_FILTER;
1985 port->ndev->vlan_features |= NETIF_F_SG;
1986 port->ndev->netdev_ops = &am65_cpsw_nuss_netdev_ops;
1987 port->ndev->ethtool_ops = &am65_cpsw_ethtool_ops_slave;
1988
1989 /* Configuring Phylink */
1990 port->slave.phylink_config.dev = &port->ndev->dev;
1991 port->slave.phylink_config.type = PHYLINK_NETDEV;
1992 port->slave.phylink_config.mac_capabilities = MAC_SYM_PAUSE | MAC_10 | MAC_100 | MAC_1000FD;
1993
1994 if (phy_interface_mode_is_rgmii(port->slave.phy_if)) {
1995 phy_interface_set_rgmii(port->slave.phylink_config.supported_interfaces);
1996 } else if (port->slave.phy_if == PHY_INTERFACE_MODE_RMII) {
1997 __set_bit(PHY_INTERFACE_MODE_RMII,
1998 port->slave.phylink_config.supported_interfaces);
1999 } else if (common->pdata.extra_modes & BIT(port->slave.phy_if)) {
2000 __set_bit(PHY_INTERFACE_MODE_QSGMII,
2001 port->slave.phylink_config.supported_interfaces);
2002 } else {
2003 dev_err(dev, "selected phy-mode is not supported\n");
2004 return -EOPNOTSUPP;
2005 }
2006
2007 phylink = phylink_create(&port->slave.phylink_config,
2008 of_node_to_fwnode(port->slave.phy_node),
2009 port->slave.phy_if,
2010 &am65_cpsw_phylink_mac_ops);
2011 if (IS_ERR(phylink))
2012 return PTR_ERR(phylink);
2013
2014 port->slave.phylink = phylink;
2015
2016 /* Disable TX checksum offload by default due to HW bug */
2017 if (common->pdata.quirks & AM65_CPSW_QUIRK_I2027_NO_TX_CSUM)
2018 port->ndev->features &= ~NETIF_F_HW_CSUM;
2019
2020 ndev_priv->stats = netdev_alloc_pcpu_stats(struct am65_cpsw_ndev_stats);
2021 if (!ndev_priv->stats)
2022 return -ENOMEM;
2023
2024 ret = devm_add_action_or_reset(dev, am65_cpsw_pcpu_stats_free,
2025 ndev_priv->stats);
2026 if (ret)
2027 dev_err(dev, "failed to add percpu stat free action %d\n", ret);
2028
2029 if (!common->dma_ndev)
2030 common->dma_ndev = port->ndev;
2031
2032 return ret;
2033 }
2034
am65_cpsw_nuss_init_ndevs(struct am65_cpsw_common * common)2035 static int am65_cpsw_nuss_init_ndevs(struct am65_cpsw_common *common)
2036 {
2037 int ret;
2038 int i;
2039
2040 for (i = 0; i < common->port_num; i++) {
2041 ret = am65_cpsw_nuss_init_port_ndev(common, i);
2042 if (ret)
2043 return ret;
2044 }
2045
2046 netif_napi_add(common->dma_ndev, &common->napi_rx,
2047 am65_cpsw_nuss_rx_poll);
2048
2049 return ret;
2050 }
2051
am65_cpsw_nuss_ndev_add_tx_napi(struct am65_cpsw_common * common)2052 static int am65_cpsw_nuss_ndev_add_tx_napi(struct am65_cpsw_common *common)
2053 {
2054 struct device *dev = common->dev;
2055 int i, ret = 0;
2056
2057 for (i = 0; i < common->tx_ch_num; i++) {
2058 struct am65_cpsw_tx_chn *tx_chn = &common->tx_chns[i];
2059
2060 netif_napi_add_tx(common->dma_ndev, &tx_chn->napi_tx,
2061 am65_cpsw_nuss_tx_poll);
2062
2063 ret = devm_request_irq(dev, tx_chn->irq,
2064 am65_cpsw_nuss_tx_irq,
2065 IRQF_TRIGGER_HIGH,
2066 tx_chn->tx_chn_name, tx_chn);
2067 if (ret) {
2068 dev_err(dev, "failure requesting tx%u irq %u, %d\n",
2069 tx_chn->id, tx_chn->irq, ret);
2070 goto err;
2071 }
2072 }
2073
2074 err:
2075 return ret;
2076 }
2077
am65_cpsw_nuss_cleanup_ndev(struct am65_cpsw_common * common)2078 static void am65_cpsw_nuss_cleanup_ndev(struct am65_cpsw_common *common)
2079 {
2080 struct am65_cpsw_port *port;
2081 int i;
2082
2083 for (i = 0; i < common->port_num; i++) {
2084 port = &common->ports[i];
2085 if (port->ndev && port->ndev->reg_state == NETREG_REGISTERED)
2086 unregister_netdev(port->ndev);
2087 }
2088 }
2089
am65_cpsw_port_offload_fwd_mark_update(struct am65_cpsw_common * common)2090 static void am65_cpsw_port_offload_fwd_mark_update(struct am65_cpsw_common *common)
2091 {
2092 int set_val = 0;
2093 int i;
2094
2095 if (common->br_members == (GENMASK(common->port_num, 1) & ~common->disabled_ports_mask))
2096 set_val = 1;
2097
2098 dev_dbg(common->dev, "set offload_fwd_mark %d\n", set_val);
2099
2100 for (i = 1; i <= common->port_num; i++) {
2101 struct am65_cpsw_port *port = am65_common_get_port(common, i);
2102 struct am65_cpsw_ndev_priv *priv;
2103
2104 if (!port->ndev)
2105 continue;
2106
2107 priv = am65_ndev_to_priv(port->ndev);
2108 priv->offload_fwd_mark = set_val;
2109 }
2110 }
2111
am65_cpsw_port_dev_check(const struct net_device * ndev)2112 bool am65_cpsw_port_dev_check(const struct net_device *ndev)
2113 {
2114 if (ndev->netdev_ops == &am65_cpsw_nuss_netdev_ops) {
2115 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2116
2117 return !common->is_emac_mode;
2118 }
2119
2120 return false;
2121 }
2122
am65_cpsw_netdevice_port_link(struct net_device * ndev,struct net_device * br_ndev,struct netlink_ext_ack * extack)2123 static int am65_cpsw_netdevice_port_link(struct net_device *ndev,
2124 struct net_device *br_ndev,
2125 struct netlink_ext_ack *extack)
2126 {
2127 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2128 struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev);
2129 int err;
2130
2131 if (!common->br_members) {
2132 common->hw_bridge_dev = br_ndev;
2133 } else {
2134 /* This is adding the port to a second bridge, this is
2135 * unsupported
2136 */
2137 if (common->hw_bridge_dev != br_ndev)
2138 return -EOPNOTSUPP;
2139 }
2140
2141 err = switchdev_bridge_port_offload(ndev, ndev, NULL, NULL, NULL,
2142 false, extack);
2143 if (err)
2144 return err;
2145
2146 common->br_members |= BIT(priv->port->port_id);
2147
2148 am65_cpsw_port_offload_fwd_mark_update(common);
2149
2150 return NOTIFY_DONE;
2151 }
2152
am65_cpsw_netdevice_port_unlink(struct net_device * ndev)2153 static void am65_cpsw_netdevice_port_unlink(struct net_device *ndev)
2154 {
2155 struct am65_cpsw_common *common = am65_ndev_to_common(ndev);
2156 struct am65_cpsw_ndev_priv *priv = am65_ndev_to_priv(ndev);
2157
2158 switchdev_bridge_port_unoffload(ndev, NULL, NULL, NULL);
2159
2160 common->br_members &= ~BIT(priv->port->port_id);
2161
2162 am65_cpsw_port_offload_fwd_mark_update(common);
2163
2164 if (!common->br_members)
2165 common->hw_bridge_dev = NULL;
2166 }
2167
2168 /* netdev notifier */
am65_cpsw_netdevice_event(struct notifier_block * unused,unsigned long event,void * ptr)2169 static int am65_cpsw_netdevice_event(struct notifier_block *unused,
2170 unsigned long event, void *ptr)
2171 {
2172 struct netlink_ext_ack *extack = netdev_notifier_info_to_extack(ptr);
2173 struct net_device *ndev = netdev_notifier_info_to_dev(ptr);
2174 struct netdev_notifier_changeupper_info *info;
2175 int ret = NOTIFY_DONE;
2176
2177 if (!am65_cpsw_port_dev_check(ndev))
2178 return NOTIFY_DONE;
2179
2180 switch (event) {
2181 case NETDEV_CHANGEUPPER:
2182 info = ptr;
2183
2184 if (netif_is_bridge_master(info->upper_dev)) {
2185 if (info->linking)
2186 ret = am65_cpsw_netdevice_port_link(ndev,
2187 info->upper_dev,
2188 extack);
2189 else
2190 am65_cpsw_netdevice_port_unlink(ndev);
2191 }
2192 break;
2193 default:
2194 return NOTIFY_DONE;
2195 }
2196
2197 return notifier_from_errno(ret);
2198 }
2199
am65_cpsw_register_notifiers(struct am65_cpsw_common * cpsw)2200 static int am65_cpsw_register_notifiers(struct am65_cpsw_common *cpsw)
2201 {
2202 int ret = 0;
2203
2204 if (AM65_CPSW_IS_CPSW2G(cpsw) ||
2205 !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2206 return 0;
2207
2208 cpsw->am65_cpsw_netdevice_nb.notifier_call = &am65_cpsw_netdevice_event;
2209 ret = register_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2210 if (ret) {
2211 dev_err(cpsw->dev, "can't register netdevice notifier\n");
2212 return ret;
2213 }
2214
2215 ret = am65_cpsw_switchdev_register_notifiers(cpsw);
2216 if (ret)
2217 unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2218
2219 return ret;
2220 }
2221
am65_cpsw_unregister_notifiers(struct am65_cpsw_common * cpsw)2222 static void am65_cpsw_unregister_notifiers(struct am65_cpsw_common *cpsw)
2223 {
2224 if (AM65_CPSW_IS_CPSW2G(cpsw) ||
2225 !IS_REACHABLE(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2226 return;
2227
2228 am65_cpsw_switchdev_unregister_notifiers(cpsw);
2229 unregister_netdevice_notifier(&cpsw->am65_cpsw_netdevice_nb);
2230 }
2231
2232 static const struct devlink_ops am65_cpsw_devlink_ops = {};
2233
am65_cpsw_init_stp_ale_entry(struct am65_cpsw_common * cpsw)2234 static void am65_cpsw_init_stp_ale_entry(struct am65_cpsw_common *cpsw)
2235 {
2236 cpsw_ale_add_mcast(cpsw->ale, eth_stp_addr, ALE_PORT_HOST, ALE_SUPER, 0,
2237 ALE_MCAST_BLOCK_LEARN_FWD);
2238 }
2239
am65_cpsw_init_host_port_switch(struct am65_cpsw_common * common)2240 static void am65_cpsw_init_host_port_switch(struct am65_cpsw_common *common)
2241 {
2242 struct am65_cpsw_host *host = am65_common_get_host(common);
2243
2244 writel(common->default_vlan, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2245
2246 am65_cpsw_init_stp_ale_entry(common);
2247
2248 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 1);
2249 dev_dbg(common->dev, "Set P0_UNI_FLOOD\n");
2250 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 0);
2251 }
2252
am65_cpsw_init_host_port_emac(struct am65_cpsw_common * common)2253 static void am65_cpsw_init_host_port_emac(struct am65_cpsw_common *common)
2254 {
2255 struct am65_cpsw_host *host = am65_common_get_host(common);
2256
2257 writel(0, host->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2258
2259 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_P0_UNI_FLOOD, 0);
2260 dev_dbg(common->dev, "unset P0_UNI_FLOOD\n");
2261
2262 /* learning make no sense in multi-mac mode */
2263 cpsw_ale_control_set(common->ale, HOST_PORT_NUM, ALE_PORT_NOLEARN, 1);
2264 }
2265
am65_cpsw_dl_switch_mode_get(struct devlink * dl,u32 id,struct devlink_param_gset_ctx * ctx)2266 static int am65_cpsw_dl_switch_mode_get(struct devlink *dl, u32 id,
2267 struct devlink_param_gset_ctx *ctx)
2268 {
2269 struct am65_cpsw_devlink *dl_priv = devlink_priv(dl);
2270 struct am65_cpsw_common *common = dl_priv->common;
2271
2272 dev_dbg(common->dev, "%s id:%u\n", __func__, id);
2273
2274 if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE)
2275 return -EOPNOTSUPP;
2276
2277 ctx->val.vbool = !common->is_emac_mode;
2278
2279 return 0;
2280 }
2281
am65_cpsw_init_port_emac_ale(struct am65_cpsw_port * port)2282 static void am65_cpsw_init_port_emac_ale(struct am65_cpsw_port *port)
2283 {
2284 struct am65_cpsw_slave_data *slave = &port->slave;
2285 struct am65_cpsw_common *common = port->common;
2286 u32 port_mask;
2287
2288 writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2289
2290 if (slave->mac_only)
2291 /* enable mac-only mode on port */
2292 cpsw_ale_control_set(common->ale, port->port_id,
2293 ALE_PORT_MACONLY, 1);
2294
2295 cpsw_ale_control_set(common->ale, port->port_id, ALE_PORT_NOLEARN, 1);
2296
2297 port_mask = BIT(port->port_id) | ALE_PORT_HOST;
2298
2299 cpsw_ale_add_ucast(common->ale, port->ndev->dev_addr,
2300 HOST_PORT_NUM, ALE_SECURE, slave->port_vlan);
2301 cpsw_ale_add_mcast(common->ale, port->ndev->broadcast,
2302 port_mask, ALE_VLAN, slave->port_vlan, ALE_MCAST_FWD_2);
2303 }
2304
am65_cpsw_init_port_switch_ale(struct am65_cpsw_port * port)2305 static void am65_cpsw_init_port_switch_ale(struct am65_cpsw_port *port)
2306 {
2307 struct am65_cpsw_slave_data *slave = &port->slave;
2308 struct am65_cpsw_common *cpsw = port->common;
2309 u32 port_mask;
2310
2311 cpsw_ale_control_set(cpsw->ale, port->port_id,
2312 ALE_PORT_NOLEARN, 0);
2313
2314 cpsw_ale_add_ucast(cpsw->ale, port->ndev->dev_addr,
2315 HOST_PORT_NUM, ALE_SECURE | ALE_BLOCKED | ALE_VLAN,
2316 slave->port_vlan);
2317
2318 port_mask = BIT(port->port_id) | ALE_PORT_HOST;
2319
2320 cpsw_ale_add_mcast(cpsw->ale, port->ndev->broadcast,
2321 port_mask, ALE_VLAN, slave->port_vlan,
2322 ALE_MCAST_FWD_2);
2323
2324 writel(slave->port_vlan, port->port_base + AM65_CPSW_PORT_VLAN_REG_OFFSET);
2325
2326 cpsw_ale_control_set(cpsw->ale, port->port_id,
2327 ALE_PORT_MACONLY, 0);
2328 }
2329
am65_cpsw_dl_switch_mode_set(struct devlink * dl,u32 id,struct devlink_param_gset_ctx * ctx)2330 static int am65_cpsw_dl_switch_mode_set(struct devlink *dl, u32 id,
2331 struct devlink_param_gset_ctx *ctx)
2332 {
2333 struct am65_cpsw_devlink *dl_priv = devlink_priv(dl);
2334 struct am65_cpsw_common *cpsw = dl_priv->common;
2335 bool switch_en = ctx->val.vbool;
2336 bool if_running = false;
2337 int i;
2338
2339 dev_dbg(cpsw->dev, "%s id:%u\n", __func__, id);
2340
2341 if (id != AM65_CPSW_DL_PARAM_SWITCH_MODE)
2342 return -EOPNOTSUPP;
2343
2344 if (switch_en == !cpsw->is_emac_mode)
2345 return 0;
2346
2347 if (!switch_en && cpsw->br_members) {
2348 dev_err(cpsw->dev, "Remove ports from bridge before disabling switch mode\n");
2349 return -EINVAL;
2350 }
2351
2352 rtnl_lock();
2353
2354 cpsw->is_emac_mode = !switch_en;
2355
2356 for (i = 0; i < cpsw->port_num; i++) {
2357 struct net_device *sl_ndev = cpsw->ports[i].ndev;
2358
2359 if (!sl_ndev || !netif_running(sl_ndev))
2360 continue;
2361
2362 if_running = true;
2363 }
2364
2365 if (!if_running) {
2366 /* all ndevs are down */
2367 for (i = 0; i < cpsw->port_num; i++) {
2368 struct net_device *sl_ndev = cpsw->ports[i].ndev;
2369 struct am65_cpsw_slave_data *slave;
2370
2371 if (!sl_ndev)
2372 continue;
2373
2374 slave = am65_ndev_to_slave(sl_ndev);
2375 if (switch_en)
2376 slave->port_vlan = cpsw->default_vlan;
2377 else
2378 slave->port_vlan = 0;
2379 }
2380
2381 goto exit;
2382 }
2383
2384 cpsw_ale_control_set(cpsw->ale, 0, ALE_BYPASS, 1);
2385 /* clean up ALE table */
2386 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_CLEAR, 1);
2387 cpsw_ale_control_get(cpsw->ale, HOST_PORT_NUM, ALE_AGEOUT);
2388
2389 if (switch_en) {
2390 dev_info(cpsw->dev, "Enable switch mode\n");
2391
2392 am65_cpsw_init_host_port_switch(cpsw);
2393
2394 for (i = 0; i < cpsw->port_num; i++) {
2395 struct net_device *sl_ndev = cpsw->ports[i].ndev;
2396 struct am65_cpsw_slave_data *slave;
2397 struct am65_cpsw_port *port;
2398
2399 if (!sl_ndev)
2400 continue;
2401
2402 port = am65_ndev_to_port(sl_ndev);
2403 slave = am65_ndev_to_slave(sl_ndev);
2404 slave->port_vlan = cpsw->default_vlan;
2405
2406 if (netif_running(sl_ndev))
2407 am65_cpsw_init_port_switch_ale(port);
2408 }
2409
2410 } else {
2411 dev_info(cpsw->dev, "Disable switch mode\n");
2412
2413 am65_cpsw_init_host_port_emac(cpsw);
2414
2415 for (i = 0; i < cpsw->port_num; i++) {
2416 struct net_device *sl_ndev = cpsw->ports[i].ndev;
2417 struct am65_cpsw_port *port;
2418
2419 if (!sl_ndev)
2420 continue;
2421
2422 port = am65_ndev_to_port(sl_ndev);
2423 port->slave.port_vlan = 0;
2424 if (netif_running(sl_ndev))
2425 am65_cpsw_init_port_emac_ale(port);
2426 }
2427 }
2428 cpsw_ale_control_set(cpsw->ale, HOST_PORT_NUM, ALE_BYPASS, 0);
2429 exit:
2430 rtnl_unlock();
2431
2432 return 0;
2433 }
2434
2435 static const struct devlink_param am65_cpsw_devlink_params[] = {
2436 DEVLINK_PARAM_DRIVER(AM65_CPSW_DL_PARAM_SWITCH_MODE, "switch_mode",
2437 DEVLINK_PARAM_TYPE_BOOL,
2438 BIT(DEVLINK_PARAM_CMODE_RUNTIME),
2439 am65_cpsw_dl_switch_mode_get,
2440 am65_cpsw_dl_switch_mode_set, NULL),
2441 };
2442
am65_cpsw_nuss_register_devlink(struct am65_cpsw_common * common)2443 static int am65_cpsw_nuss_register_devlink(struct am65_cpsw_common *common)
2444 {
2445 struct devlink_port_attrs attrs = {};
2446 struct am65_cpsw_devlink *dl_priv;
2447 struct device *dev = common->dev;
2448 struct devlink_port *dl_port;
2449 struct am65_cpsw_port *port;
2450 int ret = 0;
2451 int i;
2452
2453 common->devlink =
2454 devlink_alloc(&am65_cpsw_devlink_ops, sizeof(*dl_priv), dev);
2455 if (!common->devlink)
2456 return -ENOMEM;
2457
2458 dl_priv = devlink_priv(common->devlink);
2459 dl_priv->common = common;
2460
2461 /* Provide devlink hook to switch mode when multiple external ports
2462 * are present NUSS switchdev driver is enabled.
2463 */
2464 if (!AM65_CPSW_IS_CPSW2G(common) &&
2465 IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV)) {
2466 ret = devlink_params_register(common->devlink,
2467 am65_cpsw_devlink_params,
2468 ARRAY_SIZE(am65_cpsw_devlink_params));
2469 if (ret) {
2470 dev_err(dev, "devlink params reg fail ret:%d\n", ret);
2471 goto dl_unreg;
2472 }
2473 }
2474
2475 for (i = 1; i <= common->port_num; i++) {
2476 port = am65_common_get_port(common, i);
2477 dl_port = &port->devlink_port;
2478
2479 if (port->ndev)
2480 attrs.flavour = DEVLINK_PORT_FLAVOUR_PHYSICAL;
2481 else
2482 attrs.flavour = DEVLINK_PORT_FLAVOUR_UNUSED;
2483 attrs.phys.port_number = port->port_id;
2484 attrs.switch_id.id_len = sizeof(resource_size_t);
2485 memcpy(attrs.switch_id.id, common->switch_id, attrs.switch_id.id_len);
2486 devlink_port_attrs_set(dl_port, &attrs);
2487
2488 ret = devlink_port_register(common->devlink, dl_port, port->port_id);
2489 if (ret) {
2490 dev_err(dev, "devlink_port reg fail for port %d, ret:%d\n",
2491 port->port_id, ret);
2492 goto dl_port_unreg;
2493 }
2494 }
2495 devlink_register(common->devlink);
2496 return ret;
2497
2498 dl_port_unreg:
2499 for (i = i - 1; i >= 1; i--) {
2500 port = am65_common_get_port(common, i);
2501 dl_port = &port->devlink_port;
2502
2503 devlink_port_unregister(dl_port);
2504 }
2505 dl_unreg:
2506 devlink_free(common->devlink);
2507 return ret;
2508 }
2509
am65_cpsw_unregister_devlink(struct am65_cpsw_common * common)2510 static void am65_cpsw_unregister_devlink(struct am65_cpsw_common *common)
2511 {
2512 struct devlink_port *dl_port;
2513 struct am65_cpsw_port *port;
2514 int i;
2515
2516 devlink_unregister(common->devlink);
2517
2518 for (i = 1; i <= common->port_num; i++) {
2519 port = am65_common_get_port(common, i);
2520 dl_port = &port->devlink_port;
2521
2522 devlink_port_unregister(dl_port);
2523 }
2524
2525 if (!AM65_CPSW_IS_CPSW2G(common) &&
2526 IS_ENABLED(CONFIG_TI_K3_AM65_CPSW_SWITCHDEV))
2527 devlink_params_unregister(common->devlink,
2528 am65_cpsw_devlink_params,
2529 ARRAY_SIZE(am65_cpsw_devlink_params));
2530
2531 devlink_free(common->devlink);
2532 }
2533
am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common * common)2534 static int am65_cpsw_nuss_register_ndevs(struct am65_cpsw_common *common)
2535 {
2536 struct device *dev = common->dev;
2537 struct devlink_port *dl_port;
2538 struct am65_cpsw_port *port;
2539 int ret = 0, i;
2540
2541 ret = am65_cpsw_nuss_ndev_add_tx_napi(common);
2542 if (ret)
2543 return ret;
2544
2545 ret = devm_request_irq(dev, common->rx_chns.irq,
2546 am65_cpsw_nuss_rx_irq,
2547 IRQF_TRIGGER_HIGH, dev_name(dev), common);
2548 if (ret) {
2549 dev_err(dev, "failure requesting rx irq %u, %d\n",
2550 common->rx_chns.irq, ret);
2551 return ret;
2552 }
2553
2554 ret = am65_cpsw_nuss_register_devlink(common);
2555 if (ret)
2556 return ret;
2557
2558 for (i = 0; i < common->port_num; i++) {
2559 port = &common->ports[i];
2560
2561 if (!port->ndev)
2562 continue;
2563
2564 ret = register_netdev(port->ndev);
2565 if (ret) {
2566 dev_err(dev, "error registering slave net device%i %d\n",
2567 i, ret);
2568 goto err_cleanup_ndev;
2569 }
2570
2571 dl_port = &port->devlink_port;
2572 devlink_port_type_eth_set(dl_port, port->ndev);
2573 }
2574
2575 ret = am65_cpsw_register_notifiers(common);
2576 if (ret)
2577 goto err_cleanup_ndev;
2578
2579 /* can't auto unregister ndev using devm_add_action() due to
2580 * devres release sequence in DD core for DMA
2581 */
2582
2583 return 0;
2584
2585 err_cleanup_ndev:
2586 am65_cpsw_nuss_cleanup_ndev(common);
2587 am65_cpsw_unregister_devlink(common);
2588
2589 return ret;
2590 }
2591
am65_cpsw_nuss_update_tx_chns(struct am65_cpsw_common * common,int num_tx)2592 int am65_cpsw_nuss_update_tx_chns(struct am65_cpsw_common *common, int num_tx)
2593 {
2594 int ret;
2595
2596 common->tx_ch_num = num_tx;
2597 ret = am65_cpsw_nuss_init_tx_chns(common);
2598 if (ret)
2599 return ret;
2600
2601 return am65_cpsw_nuss_ndev_add_tx_napi(common);
2602 }
2603
2604 struct am65_cpsw_soc_pdata {
2605 u32 quirks_dis;
2606 };
2607
2608 static const struct am65_cpsw_soc_pdata am65x_soc_sr2_0 = {
2609 .quirks_dis = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM,
2610 };
2611
2612 static const struct soc_device_attribute am65_cpsw_socinfo[] = {
2613 { .family = "AM65X",
2614 .revision = "SR2.0",
2615 .data = &am65x_soc_sr2_0
2616 },
2617 {/* sentinel */}
2618 };
2619
2620 static const struct am65_cpsw_pdata am65x_sr1_0 = {
2621 .quirks = AM65_CPSW_QUIRK_I2027_NO_TX_CSUM,
2622 .ale_dev_id = "am65x-cpsw2g",
2623 .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
2624 };
2625
2626 static const struct am65_cpsw_pdata j721e_pdata = {
2627 .quirks = 0,
2628 .ale_dev_id = "am65x-cpsw2g",
2629 .fdqring_mode = K3_RINGACC_RING_MODE_MESSAGE,
2630 };
2631
2632 static const struct am65_cpsw_pdata am64x_cpswxg_pdata = {
2633 .quirks = 0,
2634 .ale_dev_id = "am64-cpswxg",
2635 .fdqring_mode = K3_RINGACC_RING_MODE_RING,
2636 };
2637
2638 static const struct am65_cpsw_pdata j7200_cpswxg_pdata = {
2639 .quirks = 0,
2640 .ale_dev_id = "am64-cpswxg",
2641 .fdqring_mode = K3_RINGACC_RING_MODE_RING,
2642 .extra_modes = BIT(PHY_INTERFACE_MODE_QSGMII),
2643 };
2644
2645 static const struct of_device_id am65_cpsw_nuss_of_mtable[] = {
2646 { .compatible = "ti,am654-cpsw-nuss", .data = &am65x_sr1_0},
2647 { .compatible = "ti,j721e-cpsw-nuss", .data = &j721e_pdata},
2648 { .compatible = "ti,am642-cpsw-nuss", .data = &am64x_cpswxg_pdata},
2649 { .compatible = "ti,j7200-cpswxg-nuss", .data = &j7200_cpswxg_pdata},
2650 { /* sentinel */ },
2651 };
2652 MODULE_DEVICE_TABLE(of, am65_cpsw_nuss_of_mtable);
2653
am65_cpsw_nuss_apply_socinfo(struct am65_cpsw_common * common)2654 static void am65_cpsw_nuss_apply_socinfo(struct am65_cpsw_common *common)
2655 {
2656 const struct soc_device_attribute *soc;
2657
2658 soc = soc_device_match(am65_cpsw_socinfo);
2659 if (soc && soc->data) {
2660 const struct am65_cpsw_soc_pdata *socdata = soc->data;
2661
2662 /* disable quirks */
2663 common->pdata.quirks &= ~socdata->quirks_dis;
2664 }
2665 }
2666
am65_cpsw_nuss_probe(struct platform_device * pdev)2667 static int am65_cpsw_nuss_probe(struct platform_device *pdev)
2668 {
2669 struct cpsw_ale_params ale_params = { 0 };
2670 const struct of_device_id *of_id;
2671 struct device *dev = &pdev->dev;
2672 struct am65_cpsw_common *common;
2673 struct device_node *node;
2674 struct resource *res;
2675 struct clk *clk;
2676 u64 id_temp;
2677 int ret, i;
2678
2679 common = devm_kzalloc(dev, sizeof(struct am65_cpsw_common), GFP_KERNEL);
2680 if (!common)
2681 return -ENOMEM;
2682 common->dev = dev;
2683
2684 of_id = of_match_device(am65_cpsw_nuss_of_mtable, dev);
2685 if (!of_id)
2686 return -EINVAL;
2687 common->pdata = *(const struct am65_cpsw_pdata *)of_id->data;
2688
2689 am65_cpsw_nuss_apply_socinfo(common);
2690
2691 res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "cpsw_nuss");
2692 common->ss_base = devm_ioremap_resource(&pdev->dev, res);
2693 if (IS_ERR(common->ss_base))
2694 return PTR_ERR(common->ss_base);
2695 common->cpsw_base = common->ss_base + AM65_CPSW_CPSW_NU_BASE;
2696 /* Use device's physical base address as switch id */
2697 id_temp = cpu_to_be64(res->start);
2698 memcpy(common->switch_id, &id_temp, sizeof(res->start));
2699
2700 node = of_get_child_by_name(dev->of_node, "ethernet-ports");
2701 if (!node)
2702 return -ENOENT;
2703 common->port_num = of_get_child_count(node);
2704 of_node_put(node);
2705 if (common->port_num < 1 || common->port_num > AM65_CPSW_MAX_PORTS)
2706 return -ENOENT;
2707
2708 common->rx_flow_id_base = -1;
2709 init_completion(&common->tdown_complete);
2710 common->tx_ch_num = 1;
2711 common->pf_p0_rx_ptype_rrobin = false;
2712 common->default_vlan = 1;
2713
2714 common->ports = devm_kcalloc(dev, common->port_num,
2715 sizeof(*common->ports),
2716 GFP_KERNEL);
2717 if (!common->ports)
2718 return -ENOMEM;
2719
2720 clk = devm_clk_get(dev, "fck");
2721 if (IS_ERR(clk))
2722 return dev_err_probe(dev, PTR_ERR(clk), "getting fck clock\n");
2723 common->bus_freq = clk_get_rate(clk);
2724
2725 pm_runtime_enable(dev);
2726 ret = pm_runtime_resume_and_get(dev);
2727 if (ret < 0) {
2728 pm_runtime_disable(dev);
2729 return ret;
2730 }
2731
2732 node = of_get_child_by_name(dev->of_node, "mdio");
2733 if (!node) {
2734 dev_warn(dev, "MDIO node not found\n");
2735 } else if (of_device_is_available(node)) {
2736 struct platform_device *mdio_pdev;
2737
2738 mdio_pdev = of_platform_device_create(node, NULL, dev);
2739 if (!mdio_pdev) {
2740 ret = -ENODEV;
2741 goto err_pm_clear;
2742 }
2743
2744 common->mdio_dev = &mdio_pdev->dev;
2745 }
2746 of_node_put(node);
2747
2748 am65_cpsw_nuss_get_ver(common);
2749
2750 /* init tx channels */
2751 ret = am65_cpsw_nuss_init_tx_chns(common);
2752 if (ret)
2753 goto err_of_clear;
2754 ret = am65_cpsw_nuss_init_rx_chns(common);
2755 if (ret)
2756 goto err_of_clear;
2757
2758 ret = am65_cpsw_nuss_init_host_p(common);
2759 if (ret)
2760 goto err_of_clear;
2761
2762 ret = am65_cpsw_nuss_init_slave_ports(common);
2763 if (ret)
2764 goto err_of_clear;
2765
2766 /* init common data */
2767 ale_params.dev = dev;
2768 ale_params.ale_ageout = AM65_CPSW_ALE_AGEOUT_DEFAULT;
2769 ale_params.ale_ports = common->port_num + 1;
2770 ale_params.ale_regs = common->cpsw_base + AM65_CPSW_NU_ALE_BASE;
2771 ale_params.dev_id = common->pdata.ale_dev_id;
2772 ale_params.bus_freq = common->bus_freq;
2773
2774 common->ale = cpsw_ale_create(&ale_params);
2775 if (IS_ERR(common->ale)) {
2776 dev_err(dev, "error initializing ale engine\n");
2777 ret = PTR_ERR(common->ale);
2778 goto err_of_clear;
2779 }
2780
2781 ret = am65_cpsw_init_cpts(common);
2782 if (ret)
2783 goto err_of_clear;
2784
2785 /* init ports */
2786 for (i = 0; i < common->port_num; i++)
2787 am65_cpsw_nuss_slave_disable_unused(&common->ports[i]);
2788
2789 dev_set_drvdata(dev, common);
2790
2791 common->is_emac_mode = true;
2792
2793 ret = am65_cpsw_nuss_init_ndevs(common);
2794 if (ret)
2795 goto err_free_phylink;
2796
2797 ret = am65_cpsw_nuss_register_ndevs(common);
2798 if (ret)
2799 goto err_free_phylink;
2800
2801 pm_runtime_put(dev);
2802 return 0;
2803
2804 err_free_phylink:
2805 am65_cpsw_nuss_phylink_cleanup(common);
2806 err_of_clear:
2807 of_platform_device_destroy(common->mdio_dev, NULL);
2808 err_pm_clear:
2809 pm_runtime_put_sync(dev);
2810 pm_runtime_disable(dev);
2811 return ret;
2812 }
2813
am65_cpsw_nuss_remove(struct platform_device * pdev)2814 static int am65_cpsw_nuss_remove(struct platform_device *pdev)
2815 {
2816 struct device *dev = &pdev->dev;
2817 struct am65_cpsw_common *common;
2818 int ret;
2819
2820 common = dev_get_drvdata(dev);
2821
2822 ret = pm_runtime_resume_and_get(&pdev->dev);
2823 if (ret < 0)
2824 return ret;
2825
2826 am65_cpsw_unregister_devlink(common);
2827 am65_cpsw_unregister_notifiers(common);
2828
2829 /* must unregister ndevs here because DD release_driver routine calls
2830 * dma_deconfigure(dev) before devres_release_all(dev)
2831 */
2832 am65_cpsw_nuss_cleanup_ndev(common);
2833 am65_cpsw_nuss_phylink_cleanup(common);
2834
2835 of_platform_device_destroy(common->mdio_dev, NULL);
2836
2837 pm_runtime_put_sync(&pdev->dev);
2838 pm_runtime_disable(&pdev->dev);
2839 return 0;
2840 }
2841
2842 static struct platform_driver am65_cpsw_nuss_driver = {
2843 .driver = {
2844 .name = AM65_CPSW_DRV_NAME,
2845 .of_match_table = am65_cpsw_nuss_of_mtable,
2846 },
2847 .probe = am65_cpsw_nuss_probe,
2848 .remove = am65_cpsw_nuss_remove,
2849 };
2850
2851 module_platform_driver(am65_cpsw_nuss_driver);
2852
2853 MODULE_LICENSE("GPL v2");
2854 MODULE_AUTHOR("Grygorii Strashko <grygorii.strashko@ti.com>");
2855 MODULE_DESCRIPTION("TI AM65 CPSW Ethernet driver");
2856
