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1// SPDX-License-Identifier: GPL-2.0+
2
3#include <linux/types.h>
4#include <linux/clk.h>
5#include <linux/platform_device.h>
6#include <linux/pm_runtime.h>
7#include <linux/acpi.h>
8#include <linux/of_mdio.h>
9#include <linux/etherdevice.h>
10#include <linux/interrupt.h>
11#include <linux/io.h>
12#include <linux/netlink.h>
13#include <linux/bpf.h>
14#include <linux/bpf_trace.h>
15
16#include <net/tcp.h>
17#include <net/page_pool.h>
18#include <net/ip6_checksum.h>
19
20#define NETSEC_REG_SOFT_RST 0x104
21#define NETSEC_REG_COM_INIT 0x120
22
23#define NETSEC_REG_TOP_STATUS 0x200
24#define NETSEC_IRQ_RX BIT(1)
25#define NETSEC_IRQ_TX BIT(0)
26
27#define NETSEC_REG_TOP_INTEN 0x204
28#define NETSEC_REG_INTEN_SET 0x234
29#define NETSEC_REG_INTEN_CLR 0x238
30
31#define NETSEC_REG_NRM_TX_STATUS 0x400
32#define NETSEC_REG_NRM_TX_INTEN 0x404
33#define NETSEC_REG_NRM_TX_INTEN_SET 0x428
34#define NETSEC_REG_NRM_TX_INTEN_CLR 0x42c
35#define NRM_TX_ST_NTOWNR BIT(17)
36#define NRM_TX_ST_TR_ERR BIT(16)
37#define NRM_TX_ST_TXDONE BIT(15)
38#define NRM_TX_ST_TMREXP BIT(14)
39
40#define NETSEC_REG_NRM_RX_STATUS 0x440
41#define NETSEC_REG_NRM_RX_INTEN 0x444
42#define NETSEC_REG_NRM_RX_INTEN_SET 0x468
43#define NETSEC_REG_NRM_RX_INTEN_CLR 0x46c
44#define NRM_RX_ST_RC_ERR BIT(16)
45#define NRM_RX_ST_PKTCNT BIT(15)
46#define NRM_RX_ST_TMREXP BIT(14)
47
48#define NETSEC_REG_PKT_CMD_BUF 0xd0
49
50#define NETSEC_REG_CLK_EN 0x100
51
52#define NETSEC_REG_PKT_CTRL 0x140
53
54#define NETSEC_REG_DMA_TMR_CTRL 0x20c
55#define NETSEC_REG_F_TAIKI_MC_VER 0x22c
56#define NETSEC_REG_F_TAIKI_VER 0x230
57#define NETSEC_REG_DMA_HM_CTRL 0x214
58#define NETSEC_REG_DMA_MH_CTRL 0x220
59#define NETSEC_REG_ADDR_DIS_CORE 0x218
60#define NETSEC_REG_DMAC_HM_CMD_BUF 0x210
61#define NETSEC_REG_DMAC_MH_CMD_BUF 0x21c
62
63#define NETSEC_REG_NRM_TX_PKTCNT 0x410
64
65#define NETSEC_REG_NRM_TX_DONE_PKTCNT 0x414
66#define NETSEC_REG_NRM_TX_DONE_TXINT_PKTCNT 0x418
67
68#define NETSEC_REG_NRM_TX_TMR 0x41c
69
70#define NETSEC_REG_NRM_RX_PKTCNT 0x454
71#define NETSEC_REG_NRM_RX_RXINT_PKTCNT 0x458
72#define NETSEC_REG_NRM_TX_TXINT_TMR 0x420
73#define NETSEC_REG_NRM_RX_RXINT_TMR 0x460
74
75#define NETSEC_REG_NRM_RX_TMR 0x45c
76
77#define NETSEC_REG_NRM_TX_DESC_START_UP 0x434
78#define NETSEC_REG_NRM_TX_DESC_START_LW 0x408
79#define NETSEC_REG_NRM_RX_DESC_START_UP 0x474
80#define NETSEC_REG_NRM_RX_DESC_START_LW 0x448
81
82#define NETSEC_REG_NRM_TX_CONFIG 0x430
83#define NETSEC_REG_NRM_RX_CONFIG 0x470
84
85#define MAC_REG_STATUS 0x1024
86#define MAC_REG_DATA 0x11c0
87#define MAC_REG_CMD 0x11c4
88#define MAC_REG_FLOW_TH 0x11cc
89#define MAC_REG_INTF_SEL 0x11d4
90#define MAC_REG_DESC_INIT 0x11fc
91#define MAC_REG_DESC_SOFT_RST 0x1204
92#define NETSEC_REG_MODE_TRANS_COMP_STATUS 0x500
93
94#define GMAC_REG_MCR 0x0000
95#define GMAC_REG_MFFR 0x0004
96#define GMAC_REG_GAR 0x0010
97#define GMAC_REG_GDR 0x0014
98#define GMAC_REG_FCR 0x0018
99#define GMAC_REG_BMR 0x1000
100#define GMAC_REG_RDLAR 0x100c
101#define GMAC_REG_TDLAR 0x1010
102#define GMAC_REG_OMR 0x1018
103
104#define MHZ(n) ((n) * 1000 * 1000)
105
106#define NETSEC_TX_SHIFT_OWN_FIELD 31
107#define NETSEC_TX_SHIFT_LD_FIELD 30
108#define NETSEC_TX_SHIFT_DRID_FIELD 24
109#define NETSEC_TX_SHIFT_PT_FIELD 21
110#define NETSEC_TX_SHIFT_TDRID_FIELD 16
111#define NETSEC_TX_SHIFT_CC_FIELD 15
112#define NETSEC_TX_SHIFT_FS_FIELD 9
113#define NETSEC_TX_LAST 8
114#define NETSEC_TX_SHIFT_CO 7
115#define NETSEC_TX_SHIFT_SO 6
116#define NETSEC_TX_SHIFT_TRS_FIELD 4
117
118#define NETSEC_RX_PKT_OWN_FIELD 31
119#define NETSEC_RX_PKT_LD_FIELD 30
120#define NETSEC_RX_PKT_SDRID_FIELD 24
121#define NETSEC_RX_PKT_FR_FIELD 23
122#define NETSEC_RX_PKT_ER_FIELD 21
123#define NETSEC_RX_PKT_ERR_FIELD 16
124#define NETSEC_RX_PKT_TDRID_FIELD 12
125#define NETSEC_RX_PKT_FS_FIELD 9
126#define NETSEC_RX_PKT_LS_FIELD 8
127#define NETSEC_RX_PKT_CO_FIELD 6
128
129#define NETSEC_RX_PKT_ERR_MASK 3
130
131#define NETSEC_MAX_TX_PKT_LEN 1518
132#define NETSEC_MAX_TX_JUMBO_PKT_LEN 9018
133
134#define NETSEC_RING_GMAC 15
135#define NETSEC_RING_MAX 2
136
137#define NETSEC_TCP_SEG_LEN_MAX 1460
138#define NETSEC_TCP_JUMBO_SEG_LEN_MAX 8960
139
140#define NETSEC_RX_CKSUM_NOTAVAIL 0
141#define NETSEC_RX_CKSUM_OK 1
142#define NETSEC_RX_CKSUM_NG 2
143
144#define NETSEC_TOP_IRQ_REG_CODE_LOAD_END BIT(20)
145#define NETSEC_IRQ_TRANSITION_COMPLETE BIT(4)
146
147#define NETSEC_MODE_TRANS_COMP_IRQ_N2T BIT(20)
148#define NETSEC_MODE_TRANS_COMP_IRQ_T2N BIT(19)
149
150#define NETSEC_INT_PKTCNT_MAX 2047
151
152#define NETSEC_FLOW_START_TH_MAX 95
153#define NETSEC_FLOW_STOP_TH_MAX 95
154#define NETSEC_FLOW_PAUSE_TIME_MIN 5
155
156#define NETSEC_CLK_EN_REG_DOM_ALL 0x3f
157
158#define NETSEC_PKT_CTRL_REG_MODE_NRM BIT(28)
159#define NETSEC_PKT_CTRL_REG_EN_JUMBO BIT(27)
160#define NETSEC_PKT_CTRL_REG_LOG_CHKSUM_ER BIT(3)
161#define NETSEC_PKT_CTRL_REG_LOG_HD_INCOMPLETE BIT(2)
162#define NETSEC_PKT_CTRL_REG_LOG_HD_ER BIT(1)
163#define NETSEC_PKT_CTRL_REG_DRP_NO_MATCH BIT(0)
164
165#define NETSEC_CLK_EN_REG_DOM_G BIT(5)
166#define NETSEC_CLK_EN_REG_DOM_C BIT(1)
167#define NETSEC_CLK_EN_REG_DOM_D BIT(0)
168
169#define NETSEC_COM_INIT_REG_DB BIT(2)
170#define NETSEC_COM_INIT_REG_CLS BIT(1)
171#define NETSEC_COM_INIT_REG_ALL (NETSEC_COM_INIT_REG_CLS | \
172 NETSEC_COM_INIT_REG_DB)
173
174#define NETSEC_SOFT_RST_REG_RESET 0
175#define NETSEC_SOFT_RST_REG_RUN BIT(31)
176
177#define NETSEC_DMA_CTRL_REG_STOP 1
178#define MH_CTRL__MODE_TRANS BIT(20)
179
180#define NETSEC_GMAC_CMD_ST_READ 0
181#define NETSEC_GMAC_CMD_ST_WRITE BIT(28)
182#define NETSEC_GMAC_CMD_ST_BUSY BIT(31)
183
184#define NETSEC_GMAC_BMR_REG_COMMON 0x00412080
185#define NETSEC_GMAC_BMR_REG_RESET 0x00020181
186#define NETSEC_GMAC_BMR_REG_SWR 0x00000001
187
188#define NETSEC_GMAC_OMR_REG_ST BIT(13)
189#define NETSEC_GMAC_OMR_REG_SR BIT(1)
190
191#define NETSEC_GMAC_MCR_REG_IBN BIT(30)
192#define NETSEC_GMAC_MCR_REG_CST BIT(25)
193#define NETSEC_GMAC_MCR_REG_JE BIT(20)
194#define NETSEC_MCR_PS BIT(15)
195#define NETSEC_GMAC_MCR_REG_FES BIT(14)
196#define NETSEC_GMAC_MCR_REG_FULL_DUPLEX_COMMON 0x0000280c
197#define NETSEC_GMAC_MCR_REG_HALF_DUPLEX_COMMON 0x0001a00c
198
199#define NETSEC_FCR_RFE BIT(2)
200#define NETSEC_FCR_TFE BIT(1)
201
202#define NETSEC_GMAC_GAR_REG_GW BIT(1)
203#define NETSEC_GMAC_GAR_REG_GB BIT(0)
204
205#define NETSEC_GMAC_GAR_REG_SHIFT_PA 11
206#define NETSEC_GMAC_GAR_REG_SHIFT_GR 6
207#define GMAC_REG_SHIFT_CR_GAR 2
208
209#define NETSEC_GMAC_GAR_REG_CR_25_35_MHZ 2
210#define NETSEC_GMAC_GAR_REG_CR_35_60_MHZ 3
211#define NETSEC_GMAC_GAR_REG_CR_60_100_MHZ 0
212#define NETSEC_GMAC_GAR_REG_CR_100_150_MHZ 1
213#define NETSEC_GMAC_GAR_REG_CR_150_250_MHZ 4
214#define NETSEC_GMAC_GAR_REG_CR_250_300_MHZ 5
215
216#define NETSEC_GMAC_RDLAR_REG_COMMON 0x18000
217#define NETSEC_GMAC_TDLAR_REG_COMMON 0x1c000
218
219#define NETSEC_REG_NETSEC_VER_F_TAIKI 0x50000
220
221#define NETSEC_REG_DESC_RING_CONFIG_CFG_UP BIT(31)
222#define NETSEC_REG_DESC_RING_CONFIG_CH_RST BIT(30)
223#define NETSEC_REG_DESC_TMR_MODE 4
224#define NETSEC_REG_DESC_ENDIAN 0
225
226#define NETSEC_MAC_DESC_SOFT_RST_SOFT_RST 1
227#define NETSEC_MAC_DESC_INIT_REG_INIT 1
228
229#define NETSEC_EEPROM_MAC_ADDRESS 0x00
230#define NETSEC_EEPROM_HM_ME_ADDRESS_H 0x08
231#define NETSEC_EEPROM_HM_ME_ADDRESS_L 0x0C
232#define NETSEC_EEPROM_HM_ME_SIZE 0x10
233#define NETSEC_EEPROM_MH_ME_ADDRESS_H 0x14
234#define NETSEC_EEPROM_MH_ME_ADDRESS_L 0x18
235#define NETSEC_EEPROM_MH_ME_SIZE 0x1C
236#define NETSEC_EEPROM_PKT_ME_ADDRESS 0x20
237#define NETSEC_EEPROM_PKT_ME_SIZE 0x24
238
239#define DESC_NUM 256
240
241#define NETSEC_SKB_PAD (NET_SKB_PAD + NET_IP_ALIGN)
242#define NETSEC_RXBUF_HEADROOM (max(XDP_PACKET_HEADROOM, NET_SKB_PAD) + \
243 NET_IP_ALIGN)
244#define NETSEC_RX_BUF_NON_DATA (NETSEC_RXBUF_HEADROOM + \
245 SKB_DATA_ALIGN(sizeof(struct skb_shared_info)))
246#define NETSEC_RX_BUF_SIZE (PAGE_SIZE - NETSEC_RX_BUF_NON_DATA)
247
248#define DESC_SZ sizeof(struct netsec_de)
249
250#define NETSEC_F_NETSEC_VER_MAJOR_NUM(x) ((x) & 0xffff0000)
251
252#define NETSEC_XDP_PASS 0
253#define NETSEC_XDP_CONSUMED BIT(0)
254#define NETSEC_XDP_TX BIT(1)
255#define NETSEC_XDP_REDIR BIT(2)
256
257enum ring_id {
258 NETSEC_RING_TX = 0,
259 NETSEC_RING_RX
260};
261
262enum buf_type {
263 TYPE_NETSEC_SKB = 0,
264 TYPE_NETSEC_XDP_TX,
265 TYPE_NETSEC_XDP_NDO,
266};
267
268struct netsec_desc {
269 union {
270 struct sk_buff *skb;
271 struct xdp_frame *xdpf;
272 };
273 dma_addr_t dma_addr;
274 void *addr;
275 u16 len;
276 u8 buf_type;
277};
278
279struct netsec_desc_ring {
280 dma_addr_t desc_dma;
281 struct netsec_desc *desc;
282 void *vaddr;
283 u16 head, tail;
284 u16 xdp_xmit; /* netsec_xdp_xmit packets */
285 struct page_pool *page_pool;
286 struct xdp_rxq_info xdp_rxq;
287 spinlock_t lock; /* XDP tx queue locking */
288};
289
290struct netsec_priv {
291 struct netsec_desc_ring desc_ring[NETSEC_RING_MAX];
292 struct ethtool_coalesce et_coalesce;
293 struct bpf_prog *xdp_prog;
294 spinlock_t reglock; /* protect reg access */
295 struct napi_struct napi;
296 phy_interface_t phy_interface;
297 struct net_device *ndev;
298 struct device_node *phy_np;
299 struct phy_device *phydev;
300 struct mii_bus *mii_bus;
301 void __iomem *ioaddr;
302 void __iomem *eeprom_base;
303 struct device *dev;
304 struct clk *clk;
305 u32 msg_enable;
306 u32 freq;
307 u32 phy_addr;
308 bool rx_cksum_offload_flag;
309};
310
311struct netsec_de { /* Netsec Descriptor layout */
312 u32 attr;
313 u32 data_buf_addr_up;
314 u32 data_buf_addr_lw;
315 u32 buf_len_info;
316};
317
318struct netsec_tx_pkt_ctrl {
319 u16 tcp_seg_len;
320 bool tcp_seg_offload_flag;
321 bool cksum_offload_flag;
322};
323
324struct netsec_rx_pkt_info {
325 int rx_cksum_result;
326 int err_code;
327 bool err_flag;
328};
329
330static void netsec_write(struct netsec_priv *priv, u32 reg_addr, u32 val)
331{
332 writel(val, priv->ioaddr + reg_addr);
333}
334
335static u32 netsec_read(struct netsec_priv *priv, u32 reg_addr)
336{
337 return readl(priv->ioaddr + reg_addr);
338}
339
340/************* MDIO BUS OPS FOLLOW *************/
341
342#define TIMEOUT_SPINS_MAC 1000
343#define TIMEOUT_SECONDARY_MS_MAC 100
344
345static u32 netsec_clk_type(u32 freq)
346{
347 if (freq < MHZ(35))
348 return NETSEC_GMAC_GAR_REG_CR_25_35_MHZ;
349 if (freq < MHZ(60))
350 return NETSEC_GMAC_GAR_REG_CR_35_60_MHZ;
351 if (freq < MHZ(100))
352 return NETSEC_GMAC_GAR_REG_CR_60_100_MHZ;
353 if (freq < MHZ(150))
354 return NETSEC_GMAC_GAR_REG_CR_100_150_MHZ;
355 if (freq < MHZ(250))
356 return NETSEC_GMAC_GAR_REG_CR_150_250_MHZ;
357
358 return NETSEC_GMAC_GAR_REG_CR_250_300_MHZ;
359}
360
361static int netsec_wait_while_busy(struct netsec_priv *priv, u32 addr, u32 mask)
362{
363 u32 timeout = TIMEOUT_SPINS_MAC;
364
365 while (--timeout && netsec_read(priv, addr) & mask)
366 cpu_relax();
367 if (timeout)
368 return 0;
369
370 timeout = TIMEOUT_SECONDARY_MS_MAC;
371 while (--timeout && netsec_read(priv, addr) & mask)
372 usleep_range(1000, 2000);
373
374 if (timeout)
375 return 0;
376
377 netdev_WARN(priv->ndev, "%s: timeout\n", __func__);
378
379 return -ETIMEDOUT;
380}
381
382static int netsec_mac_write(struct netsec_priv *priv, u32 addr, u32 value)
383{
384 netsec_write(priv, MAC_REG_DATA, value);
385 netsec_write(priv, MAC_REG_CMD, addr | NETSEC_GMAC_CMD_ST_WRITE);
386 return netsec_wait_while_busy(priv,
387 MAC_REG_CMD, NETSEC_GMAC_CMD_ST_BUSY);
388}
389
390static int netsec_mac_read(struct netsec_priv *priv, u32 addr, u32 *read)
391{
392 int ret;
393
394 netsec_write(priv, MAC_REG_CMD, addr | NETSEC_GMAC_CMD_ST_READ);
395 ret = netsec_wait_while_busy(priv,
396 MAC_REG_CMD, NETSEC_GMAC_CMD_ST_BUSY);
397 if (ret)
398 return ret;
399
400 *read = netsec_read(priv, MAC_REG_DATA);
401
402 return 0;
403}
404
405static int netsec_mac_wait_while_busy(struct netsec_priv *priv,
406 u32 addr, u32 mask)
407{
408 u32 timeout = TIMEOUT_SPINS_MAC;
409 int ret, data;
410
411 do {
412 ret = netsec_mac_read(priv, addr, &data);
413 if (ret)
414 break;
415 cpu_relax();
416 } while (--timeout && (data & mask));
417
418 if (timeout)
419 return 0;
420
421 timeout = TIMEOUT_SECONDARY_MS_MAC;
422 do {
423 usleep_range(1000, 2000);
424
425 ret = netsec_mac_read(priv, addr, &data);
426 if (ret)
427 break;
428 cpu_relax();
429 } while (--timeout && (data & mask));
430
431 if (timeout && !ret)
432 return 0;
433
434 netdev_WARN(priv->ndev, "%s: timeout\n", __func__);
435
436 return -ETIMEDOUT;
437}
438
439static int netsec_mac_update_to_phy_state(struct netsec_priv *priv)
440{
441 struct phy_device *phydev = priv->ndev->phydev;
442 u32 value = 0;
443
444 value = phydev->duplex ? NETSEC_GMAC_MCR_REG_FULL_DUPLEX_COMMON :
445 NETSEC_GMAC_MCR_REG_HALF_DUPLEX_COMMON;
446
447 if (phydev->speed != SPEED_1000)
448 value |= NETSEC_MCR_PS;
449
450 if (priv->phy_interface != PHY_INTERFACE_MODE_GMII &&
451 phydev->speed == SPEED_100)
452 value |= NETSEC_GMAC_MCR_REG_FES;
453
454 value |= NETSEC_GMAC_MCR_REG_CST | NETSEC_GMAC_MCR_REG_JE;
455
456 if (phy_interface_mode_is_rgmii(priv->phy_interface))
457 value |= NETSEC_GMAC_MCR_REG_IBN;
458
459 if (netsec_mac_write(priv, GMAC_REG_MCR, value))
460 return -ETIMEDOUT;
461
462 return 0;
463}
464
465static int netsec_phy_read(struct mii_bus *bus, int phy_addr, int reg_addr);
466
467static int netsec_phy_write(struct mii_bus *bus,
468 int phy_addr, int reg, u16 val)
469{
470 int status;
471 struct netsec_priv *priv = bus->priv;
472
473 if (netsec_mac_write(priv, GMAC_REG_GDR, val))
474 return -ETIMEDOUT;
475 if (netsec_mac_write(priv, GMAC_REG_GAR,
476 phy_addr << NETSEC_GMAC_GAR_REG_SHIFT_PA |
477 reg << NETSEC_GMAC_GAR_REG_SHIFT_GR |
478 NETSEC_GMAC_GAR_REG_GW | NETSEC_GMAC_GAR_REG_GB |
479 (netsec_clk_type(priv->freq) <<
480 GMAC_REG_SHIFT_CR_GAR)))
481 return -ETIMEDOUT;
482
483 status = netsec_mac_wait_while_busy(priv, GMAC_REG_GAR,
484 NETSEC_GMAC_GAR_REG_GB);
485
486 /* Developerbox implements RTL8211E PHY and there is
487 * a compatibility problem with F_GMAC4.
488 * RTL8211E expects MDC clock must be kept toggling for several
489 * clock cycle with MDIO high before entering the IDLE state.
490 * To meet this requirement, netsec driver needs to issue dummy
491 * read(e.g. read PHYID1(offset 0x2) register) right after write.
492 */
493 netsec_phy_read(bus, phy_addr, MII_PHYSID1);
494
495 return status;
496}
497
498static int netsec_phy_read(struct mii_bus *bus, int phy_addr, int reg_addr)
499{
500 struct netsec_priv *priv = bus->priv;
501 u32 data;
502 int ret;
503
504 if (netsec_mac_write(priv, GMAC_REG_GAR, NETSEC_GMAC_GAR_REG_GB |
505 phy_addr << NETSEC_GMAC_GAR_REG_SHIFT_PA |
506 reg_addr << NETSEC_GMAC_GAR_REG_SHIFT_GR |
507 (netsec_clk_type(priv->freq) <<
508 GMAC_REG_SHIFT_CR_GAR)))
509 return -ETIMEDOUT;
510
511 ret = netsec_mac_wait_while_busy(priv, GMAC_REG_GAR,
512 NETSEC_GMAC_GAR_REG_GB);
513 if (ret)
514 return ret;
515
516 ret = netsec_mac_read(priv, GMAC_REG_GDR, &data);
517 if (ret)
518 return ret;
519
520 return data;
521}
522
523/************* ETHTOOL_OPS FOLLOW *************/
524
525static void netsec_et_get_drvinfo(struct net_device *net_device,
526 struct ethtool_drvinfo *info)
527{
528 strlcpy(info->driver, "netsec", sizeof(info->driver));
529 strlcpy(info->bus_info, dev_name(net_device->dev.parent),
530 sizeof(info->bus_info));
531}
532
533static int netsec_et_get_coalesce(struct net_device *net_device,
534 struct ethtool_coalesce *et_coalesce)
535{
536 struct netsec_priv *priv = netdev_priv(net_device);
537
538 *et_coalesce = priv->et_coalesce;
539
540 return 0;
541}
542
543static int netsec_et_set_coalesce(struct net_device *net_device,
544 struct ethtool_coalesce *et_coalesce)
545{
546 struct netsec_priv *priv = netdev_priv(net_device);
547
548 priv->et_coalesce = *et_coalesce;
549
550 if (priv->et_coalesce.tx_coalesce_usecs < 50)
551 priv->et_coalesce.tx_coalesce_usecs = 50;
552 if (priv->et_coalesce.tx_max_coalesced_frames < 1)
553 priv->et_coalesce.tx_max_coalesced_frames = 1;
554
555 netsec_write(priv, NETSEC_REG_NRM_TX_DONE_TXINT_PKTCNT,
556 priv->et_coalesce.tx_max_coalesced_frames);
557 netsec_write(priv, NETSEC_REG_NRM_TX_TXINT_TMR,
558 priv->et_coalesce.tx_coalesce_usecs);
559 netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_SET, NRM_TX_ST_TXDONE);
560 netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_SET, NRM_TX_ST_TMREXP);
561
562 if (priv->et_coalesce.rx_coalesce_usecs < 50)
563 priv->et_coalesce.rx_coalesce_usecs = 50;
564 if (priv->et_coalesce.rx_max_coalesced_frames < 1)
565 priv->et_coalesce.rx_max_coalesced_frames = 1;
566
567 netsec_write(priv, NETSEC_REG_NRM_RX_RXINT_PKTCNT,
568 priv->et_coalesce.rx_max_coalesced_frames);
569 netsec_write(priv, NETSEC_REG_NRM_RX_RXINT_TMR,
570 priv->et_coalesce.rx_coalesce_usecs);
571 netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_SET, NRM_RX_ST_PKTCNT);
572 netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_SET, NRM_RX_ST_TMREXP);
573
574 return 0;
575}
576
577static u32 netsec_et_get_msglevel(struct net_device *dev)
578{
579 struct netsec_priv *priv = netdev_priv(dev);
580
581 return priv->msg_enable;
582}
583
584static void netsec_et_set_msglevel(struct net_device *dev, u32 datum)
585{
586 struct netsec_priv *priv = netdev_priv(dev);
587
588 priv->msg_enable = datum;
589}
590
591static const struct ethtool_ops netsec_ethtool_ops = {
592 .supported_coalesce_params = ETHTOOL_COALESCE_USECS |
593 ETHTOOL_COALESCE_MAX_FRAMES,
594 .get_drvinfo = netsec_et_get_drvinfo,
595 .get_link_ksettings = phy_ethtool_get_link_ksettings,
596 .set_link_ksettings = phy_ethtool_set_link_ksettings,
597 .get_link = ethtool_op_get_link,
598 .get_coalesce = netsec_et_get_coalesce,
599 .set_coalesce = netsec_et_set_coalesce,
600 .get_msglevel = netsec_et_get_msglevel,
601 .set_msglevel = netsec_et_set_msglevel,
602};
603
604/************* NETDEV_OPS FOLLOW *************/
605
606
607static void netsec_set_rx_de(struct netsec_priv *priv,
608 struct netsec_desc_ring *dring, u16 idx,
609 const struct netsec_desc *desc)
610{
611 struct netsec_de *de = dring->vaddr + DESC_SZ * idx;
612 u32 attr = (1 << NETSEC_RX_PKT_OWN_FIELD) |
613 (1 << NETSEC_RX_PKT_FS_FIELD) |
614 (1 << NETSEC_RX_PKT_LS_FIELD);
615
616 if (idx == DESC_NUM - 1)
617 attr |= (1 << NETSEC_RX_PKT_LD_FIELD);
618
619 de->data_buf_addr_up = upper_32_bits(desc->dma_addr);
620 de->data_buf_addr_lw = lower_32_bits(desc->dma_addr);
621 de->buf_len_info = desc->len;
622 de->attr = attr;
623 dma_wmb();
624
625 dring->desc[idx].dma_addr = desc->dma_addr;
626 dring->desc[idx].addr = desc->addr;
627 dring->desc[idx].len = desc->len;
628}
629
630static bool netsec_clean_tx_dring(struct netsec_priv *priv)
631{
632 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX];
633 struct netsec_de *entry;
634 int tail = dring->tail;
635 unsigned int bytes;
636 int cnt = 0;
637
638 spin_lock(&dring->lock);
639
640 bytes = 0;
641 entry = dring->vaddr + DESC_SZ * tail;
642
643 while (!(entry->attr & (1U << NETSEC_TX_SHIFT_OWN_FIELD)) &&
644 cnt < DESC_NUM) {
645 struct netsec_desc *desc;
646 int eop;
647
648 desc = &dring->desc[tail];
649 eop = (entry->attr >> NETSEC_TX_LAST) & 1;
650 dma_rmb();
651
652 /* if buf_type is either TYPE_NETSEC_SKB or
653 * TYPE_NETSEC_XDP_NDO we mapped it
654 */
655 if (desc->buf_type != TYPE_NETSEC_XDP_TX)
656 dma_unmap_single(priv->dev, desc->dma_addr, desc->len,
657 DMA_TO_DEVICE);
658
659 if (!eop)
660 goto next;
661
662 if (desc->buf_type == TYPE_NETSEC_SKB) {
663 bytes += desc->skb->len;
664 dev_kfree_skb(desc->skb);
665 } else {
666 bytes += desc->xdpf->len;
667 xdp_return_frame(desc->xdpf);
668 }
669next:
670 /* clean up so netsec_uninit_pkt_dring() won't free the skb
671 * again
672 */
673 *desc = (struct netsec_desc){};
674
675 /* entry->attr is not going to be accessed by the NIC until
676 * netsec_set_tx_de() is called. No need for a dma_wmb() here
677 */
678 entry->attr = 1U << NETSEC_TX_SHIFT_OWN_FIELD;
679 /* move tail ahead */
680 dring->tail = (tail + 1) % DESC_NUM;
681
682 tail = dring->tail;
683 entry = dring->vaddr + DESC_SZ * tail;
684 cnt++;
685 }
686
687 spin_unlock(&dring->lock);
688
689 if (!cnt)
690 return false;
691
692 /* reading the register clears the irq */
693 netsec_read(priv, NETSEC_REG_NRM_TX_DONE_PKTCNT);
694
695 priv->ndev->stats.tx_packets += cnt;
696 priv->ndev->stats.tx_bytes += bytes;
697
698 netdev_completed_queue(priv->ndev, cnt, bytes);
699
700 return true;
701}
702
703static void netsec_process_tx(struct netsec_priv *priv)
704{
705 struct net_device *ndev = priv->ndev;
706 bool cleaned;
707
708 cleaned = netsec_clean_tx_dring(priv);
709
710 if (cleaned && netif_queue_stopped(ndev)) {
711 /* Make sure we update the value, anyone stopping the queue
712 * after this will read the proper consumer idx
713 */
714 smp_wmb();
715 netif_wake_queue(ndev);
716 }
717}
718
719static void *netsec_alloc_rx_data(struct netsec_priv *priv,
720 dma_addr_t *dma_handle, u16 *desc_len)
721
722{
723
724 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
725 struct page *page;
726
727 page = page_pool_dev_alloc_pages(dring->page_pool);
728 if (!page)
729 return NULL;
730
731 /* We allocate the same buffer length for XDP and non-XDP cases.
732 * page_pool API will map the whole page, skip what's needed for
733 * network payloads and/or XDP
734 */
735 *dma_handle = page_pool_get_dma_addr(page) + NETSEC_RXBUF_HEADROOM;
736 /* Make sure the incoming payload fits in the page for XDP and non-XDP
737 * cases and reserve enough space for headroom + skb_shared_info
738 */
739 *desc_len = NETSEC_RX_BUF_SIZE;
740
741 return page_address(page);
742}
743
744static void netsec_rx_fill(struct netsec_priv *priv, u16 from, u16 num)
745{
746 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
747 u16 idx = from;
748
749 while (num) {
750 netsec_set_rx_de(priv, dring, idx, &dring->desc[idx]);
751 idx++;
752 if (idx >= DESC_NUM)
753 idx = 0;
754 num--;
755 }
756}
757
758static void netsec_xdp_ring_tx_db(struct netsec_priv *priv, u16 pkts)
759{
760 if (likely(pkts))
761 netsec_write(priv, NETSEC_REG_NRM_TX_PKTCNT, pkts);
762}
763
764static void netsec_finalize_xdp_rx(struct netsec_priv *priv, u32 xdp_res,
765 u16 pkts)
766{
767 if (xdp_res & NETSEC_XDP_REDIR)
768 xdp_do_flush_map();
769
770 if (xdp_res & NETSEC_XDP_TX)
771 netsec_xdp_ring_tx_db(priv, pkts);
772}
773
774static void netsec_set_tx_de(struct netsec_priv *priv,
775 struct netsec_desc_ring *dring,
776 const struct netsec_tx_pkt_ctrl *tx_ctrl,
777 const struct netsec_desc *desc, void *buf)
778{
779 int idx = dring->head;
780 struct netsec_de *de;
781 u32 attr;
782
783 de = dring->vaddr + (DESC_SZ * idx);
784
785 attr = (1 << NETSEC_TX_SHIFT_OWN_FIELD) |
786 (1 << NETSEC_TX_SHIFT_PT_FIELD) |
787 (NETSEC_RING_GMAC << NETSEC_TX_SHIFT_TDRID_FIELD) |
788 (1 << NETSEC_TX_SHIFT_FS_FIELD) |
789 (1 << NETSEC_TX_LAST) |
790 (tx_ctrl->cksum_offload_flag << NETSEC_TX_SHIFT_CO) |
791 (tx_ctrl->tcp_seg_offload_flag << NETSEC_TX_SHIFT_SO) |
792 (1 << NETSEC_TX_SHIFT_TRS_FIELD);
793 if (idx == DESC_NUM - 1)
794 attr |= (1 << NETSEC_TX_SHIFT_LD_FIELD);
795
796 de->data_buf_addr_up = upper_32_bits(desc->dma_addr);
797 de->data_buf_addr_lw = lower_32_bits(desc->dma_addr);
798 de->buf_len_info = (tx_ctrl->tcp_seg_len << 16) | desc->len;
799 de->attr = attr;
800
801 dring->desc[idx] = *desc;
802 if (desc->buf_type == TYPE_NETSEC_SKB)
803 dring->desc[idx].skb = buf;
804 else if (desc->buf_type == TYPE_NETSEC_XDP_TX ||
805 desc->buf_type == TYPE_NETSEC_XDP_NDO)
806 dring->desc[idx].xdpf = buf;
807
808 /* move head ahead */
809 dring->head = (dring->head + 1) % DESC_NUM;
810}
811
812/* The current driver only supports 1 Txq, this should run under spin_lock() */
813static u32 netsec_xdp_queue_one(struct netsec_priv *priv,
814 struct xdp_frame *xdpf, bool is_ndo)
815
816{
817 struct netsec_desc_ring *tx_ring = &priv->desc_ring[NETSEC_RING_TX];
818 struct page *page = virt_to_page(xdpf->data);
819 struct netsec_tx_pkt_ctrl tx_ctrl = {};
820 struct netsec_desc tx_desc;
821 dma_addr_t dma_handle;
822 u16 filled;
823
824 if (tx_ring->head >= tx_ring->tail)
825 filled = tx_ring->head - tx_ring->tail;
826 else
827 filled = tx_ring->head + DESC_NUM - tx_ring->tail;
828
829 if (DESC_NUM - filled <= 1)
830 return NETSEC_XDP_CONSUMED;
831
832 if (is_ndo) {
833 /* this is for ndo_xdp_xmit, the buffer needs mapping before
834 * sending
835 */
836 dma_handle = dma_map_single(priv->dev, xdpf->data, xdpf->len,
837 DMA_TO_DEVICE);
838 if (dma_mapping_error(priv->dev, dma_handle))
839 return NETSEC_XDP_CONSUMED;
840 tx_desc.buf_type = TYPE_NETSEC_XDP_NDO;
841 } else {
842 /* This is the device Rx buffer from page_pool. No need to remap
843 * just sync and send it
844 */
845 struct netsec_desc_ring *rx_ring =
846 &priv->desc_ring[NETSEC_RING_RX];
847 enum dma_data_direction dma_dir =
848 page_pool_get_dma_dir(rx_ring->page_pool);
849
850 dma_handle = page_pool_get_dma_addr(page) + xdpf->headroom +
851 sizeof(*xdpf);
852 dma_sync_single_for_device(priv->dev, dma_handle, xdpf->len,
853 dma_dir);
854 tx_desc.buf_type = TYPE_NETSEC_XDP_TX;
855 }
856
857 tx_desc.dma_addr = dma_handle;
858 tx_desc.addr = xdpf->data;
859 tx_desc.len = xdpf->len;
860
861 netdev_sent_queue(priv->ndev, xdpf->len);
862 netsec_set_tx_de(priv, tx_ring, &tx_ctrl, &tx_desc, xdpf);
863
864 return NETSEC_XDP_TX;
865}
866
867static u32 netsec_xdp_xmit_back(struct netsec_priv *priv, struct xdp_buff *xdp)
868{
869 struct netsec_desc_ring *tx_ring = &priv->desc_ring[NETSEC_RING_TX];
870 struct xdp_frame *xdpf = xdp_convert_buff_to_frame(xdp);
871 u32 ret;
872
873 if (unlikely(!xdpf))
874 return NETSEC_XDP_CONSUMED;
875
876 spin_lock(&tx_ring->lock);
877 ret = netsec_xdp_queue_one(priv, xdpf, false);
878 spin_unlock(&tx_ring->lock);
879
880 return ret;
881}
882
883static u32 netsec_run_xdp(struct netsec_priv *priv, struct bpf_prog *prog,
884 struct xdp_buff *xdp)
885{
886 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
887 unsigned int sync, len = xdp->data_end - xdp->data;
888 u32 ret = NETSEC_XDP_PASS;
889 struct page *page;
890 int err;
891 u32 act;
892
893 act = bpf_prog_run_xdp(prog, xdp);
894
895 /* Due xdp_adjust_tail: DMA sync for_device cover max len CPU touch */
896 sync = xdp->data_end - xdp->data_hard_start - NETSEC_RXBUF_HEADROOM;
897 sync = max(sync, len);
898
899 switch (act) {
900 case XDP_PASS:
901 ret = NETSEC_XDP_PASS;
902 break;
903 case XDP_TX:
904 ret = netsec_xdp_xmit_back(priv, xdp);
905 if (ret != NETSEC_XDP_TX) {
906 page = virt_to_head_page(xdp->data);
907 page_pool_put_page(dring->page_pool, page, sync, true);
908 }
909 break;
910 case XDP_REDIRECT:
911 err = xdp_do_redirect(priv->ndev, xdp, prog);
912 if (!err) {
913 ret = NETSEC_XDP_REDIR;
914 } else {
915 ret = NETSEC_XDP_CONSUMED;
916 page = virt_to_head_page(xdp->data);
917 page_pool_put_page(dring->page_pool, page, sync, true);
918 }
919 break;
920 default:
921 bpf_warn_invalid_xdp_action(act);
922 fallthrough;
923 case XDP_ABORTED:
924 trace_xdp_exception(priv->ndev, prog, act);
925 fallthrough; /* handle aborts by dropping packet */
926 case XDP_DROP:
927 ret = NETSEC_XDP_CONSUMED;
928 page = virt_to_head_page(xdp->data);
929 page_pool_put_page(dring->page_pool, page, sync, true);
930 break;
931 }
932
933 return ret;
934}
935
936static int netsec_process_rx(struct netsec_priv *priv, int budget)
937{
938 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
939 struct net_device *ndev = priv->ndev;
940 struct netsec_rx_pkt_info rx_info;
941 enum dma_data_direction dma_dir;
942 struct bpf_prog *xdp_prog;
943 struct xdp_buff xdp;
944 u16 xdp_xmit = 0;
945 u32 xdp_act = 0;
946 int done = 0;
947
948 xdp.rxq = &dring->xdp_rxq;
949 xdp.frame_sz = PAGE_SIZE;
950
951 rcu_read_lock();
952 xdp_prog = READ_ONCE(priv->xdp_prog);
953 dma_dir = page_pool_get_dma_dir(dring->page_pool);
954
955 while (done < budget) {
956 u16 idx = dring->tail;
957 struct netsec_de *de = dring->vaddr + (DESC_SZ * idx);
958 struct netsec_desc *desc = &dring->desc[idx];
959 struct page *page = virt_to_page(desc->addr);
960 u32 xdp_result = NETSEC_XDP_PASS;
961 struct sk_buff *skb = NULL;
962 u16 pkt_len, desc_len;
963 dma_addr_t dma_handle;
964 void *buf_addr;
965
966 if (de->attr & (1U << NETSEC_RX_PKT_OWN_FIELD)) {
967 /* reading the register clears the irq */
968 netsec_read(priv, NETSEC_REG_NRM_RX_PKTCNT);
969 break;
970 }
971
972 /* This barrier is needed to keep us from reading
973 * any other fields out of the netsec_de until we have
974 * verified the descriptor has been written back
975 */
976 dma_rmb();
977 done++;
978
979 pkt_len = de->buf_len_info >> 16;
980 rx_info.err_code = (de->attr >> NETSEC_RX_PKT_ERR_FIELD) &
981 NETSEC_RX_PKT_ERR_MASK;
982 rx_info.err_flag = (de->attr >> NETSEC_RX_PKT_ER_FIELD) & 1;
983 if (rx_info.err_flag) {
984 netif_err(priv, drv, priv->ndev,
985 "%s: rx fail err(%d)\n", __func__,
986 rx_info.err_code);
987 ndev->stats.rx_dropped++;
988 dring->tail = (dring->tail + 1) % DESC_NUM;
989 /* reuse buffer page frag */
990 netsec_rx_fill(priv, idx, 1);
991 continue;
992 }
993 rx_info.rx_cksum_result =
994 (de->attr >> NETSEC_RX_PKT_CO_FIELD) & 3;
995
996 /* allocate a fresh buffer and map it to the hardware.
997 * This will eventually replace the old buffer in the hardware
998 */
999 buf_addr = netsec_alloc_rx_data(priv, &dma_handle, &desc_len);
1000
1001 if (unlikely(!buf_addr))
1002 break;
1003
1004 dma_sync_single_for_cpu(priv->dev, desc->dma_addr, pkt_len,
1005 dma_dir);
1006 prefetch(desc->addr);
1007
1008 xdp.data_hard_start = desc->addr;
1009 xdp.data = desc->addr + NETSEC_RXBUF_HEADROOM;
1010 xdp_set_data_meta_invalid(&xdp);
1011 xdp.data_end = xdp.data + pkt_len;
1012
1013 if (xdp_prog) {
1014 xdp_result = netsec_run_xdp(priv, xdp_prog, &xdp);
1015 if (xdp_result != NETSEC_XDP_PASS) {
1016 xdp_act |= xdp_result;
1017 if (xdp_result == NETSEC_XDP_TX)
1018 xdp_xmit++;
1019 goto next;
1020 }
1021 }
1022 skb = build_skb(desc->addr, desc->len + NETSEC_RX_BUF_NON_DATA);
1023
1024 if (unlikely(!skb)) {
1025 /* If skb fails recycle_direct will either unmap and
1026 * free the page or refill the cache depending on the
1027 * cache state. Since we paid the allocation cost if
1028 * building an skb fails try to put the page into cache
1029 */
1030 page_pool_put_page(dring->page_pool, page, pkt_len,
1031 true);
1032 netif_err(priv, drv, priv->ndev,
1033 "rx failed to build skb\n");
1034 break;
1035 }
1036 page_pool_release_page(dring->page_pool, page);
1037
1038 skb_reserve(skb, xdp.data - xdp.data_hard_start);
1039 skb_put(skb, xdp.data_end - xdp.data);
1040 skb->protocol = eth_type_trans(skb, priv->ndev);
1041
1042 if (priv->rx_cksum_offload_flag &&
1043 rx_info.rx_cksum_result == NETSEC_RX_CKSUM_OK)
1044 skb->ip_summed = CHECKSUM_UNNECESSARY;
1045
1046next:
1047 if (skb)
1048 napi_gro_receive(&priv->napi, skb);
1049 if (skb || xdp_result) {
1050 ndev->stats.rx_packets++;
1051 ndev->stats.rx_bytes += xdp.data_end - xdp.data;
1052 }
1053
1054 /* Update the descriptor with fresh buffers */
1055 desc->len = desc_len;
1056 desc->dma_addr = dma_handle;
1057 desc->addr = buf_addr;
1058
1059 netsec_rx_fill(priv, idx, 1);
1060 dring->tail = (dring->tail + 1) % DESC_NUM;
1061 }
1062 netsec_finalize_xdp_rx(priv, xdp_act, xdp_xmit);
1063
1064 rcu_read_unlock();
1065
1066 return done;
1067}
1068
1069static int netsec_napi_poll(struct napi_struct *napi, int budget)
1070{
1071 struct netsec_priv *priv;
1072 int done;
1073
1074 priv = container_of(napi, struct netsec_priv, napi);
1075
1076 netsec_process_tx(priv);
1077 done = netsec_process_rx(priv, budget);
1078
1079 if (done < budget && napi_complete_done(napi, done)) {
1080 unsigned long flags;
1081
1082 spin_lock_irqsave(&priv->reglock, flags);
1083 netsec_write(priv, NETSEC_REG_INTEN_SET,
1084 NETSEC_IRQ_RX | NETSEC_IRQ_TX);
1085 spin_unlock_irqrestore(&priv->reglock, flags);
1086 }
1087
1088 return done;
1089}
1090
1091
1092static int netsec_desc_used(struct netsec_desc_ring *dring)
1093{
1094 int used;
1095
1096 if (dring->head >= dring->tail)
1097 used = dring->head - dring->tail;
1098 else
1099 used = dring->head + DESC_NUM - dring->tail;
1100
1101 return used;
1102}
1103
1104static int netsec_check_stop_tx(struct netsec_priv *priv, int used)
1105{
1106 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX];
1107
1108 /* keep tail from touching the queue */
1109 if (DESC_NUM - used < 2) {
1110 netif_stop_queue(priv->ndev);
1111
1112 /* Make sure we read the updated value in case
1113 * descriptors got freed
1114 */
1115 smp_rmb();
1116
1117 used = netsec_desc_used(dring);
1118 if (DESC_NUM - used < 2)
1119 return NETDEV_TX_BUSY;
1120
1121 netif_wake_queue(priv->ndev);
1122 }
1123
1124 return 0;
1125}
1126
1127static netdev_tx_t netsec_netdev_start_xmit(struct sk_buff *skb,
1128 struct net_device *ndev)
1129{
1130 struct netsec_priv *priv = netdev_priv(ndev);
1131 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX];
1132 struct netsec_tx_pkt_ctrl tx_ctrl = {};
1133 struct netsec_desc tx_desc;
1134 u16 tso_seg_len = 0;
1135 int filled;
1136
1137 spin_lock_bh(&dring->lock);
1138 filled = netsec_desc_used(dring);
1139 if (netsec_check_stop_tx(priv, filled)) {
1140 spin_unlock_bh(&dring->lock);
1141 net_warn_ratelimited("%s %s Tx queue full\n",
1142 dev_name(priv->dev), ndev->name);
1143 return NETDEV_TX_BUSY;
1144 }
1145
1146 if (skb->ip_summed == CHECKSUM_PARTIAL)
1147 tx_ctrl.cksum_offload_flag = true;
1148
1149 if (skb_is_gso(skb))
1150 tso_seg_len = skb_shinfo(skb)->gso_size;
1151
1152 if (tso_seg_len > 0) {
1153 if (skb->protocol == htons(ETH_P_IP)) {
1154 ip_hdr(skb)->tot_len = 0;
1155 tcp_hdr(skb)->check =
1156 ~tcp_v4_check(0, ip_hdr(skb)->saddr,
1157 ip_hdr(skb)->daddr, 0);
1158 } else {
1159 tcp_v6_gso_csum_prep(skb);
1160 }
1161
1162 tx_ctrl.tcp_seg_offload_flag = true;
1163 tx_ctrl.tcp_seg_len = tso_seg_len;
1164 }
1165
1166 tx_desc.dma_addr = dma_map_single(priv->dev, skb->data,
1167 skb_headlen(skb), DMA_TO_DEVICE);
1168 if (dma_mapping_error(priv->dev, tx_desc.dma_addr)) {
1169 spin_unlock_bh(&dring->lock);
1170 netif_err(priv, drv, priv->ndev,
1171 "%s: DMA mapping failed\n", __func__);
1172 ndev->stats.tx_dropped++;
1173 dev_kfree_skb_any(skb);
1174 return NETDEV_TX_OK;
1175 }
1176 tx_desc.addr = skb->data;
1177 tx_desc.len = skb_headlen(skb);
1178 tx_desc.buf_type = TYPE_NETSEC_SKB;
1179
1180 skb_tx_timestamp(skb);
1181 netdev_sent_queue(priv->ndev, skb->len);
1182
1183 netsec_set_tx_de(priv, dring, &tx_ctrl, &tx_desc, skb);
1184 spin_unlock_bh(&dring->lock);
1185 netsec_write(priv, NETSEC_REG_NRM_TX_PKTCNT, 1); /* submit another tx */
1186
1187 return NETDEV_TX_OK;
1188}
1189
1190static void netsec_uninit_pkt_dring(struct netsec_priv *priv, int id)
1191{
1192 struct netsec_desc_ring *dring = &priv->desc_ring[id];
1193 struct netsec_desc *desc;
1194 u16 idx;
1195
1196 if (!dring->vaddr || !dring->desc)
1197 return;
1198 for (idx = 0; idx < DESC_NUM; idx++) {
1199 desc = &dring->desc[idx];
1200 if (!desc->addr)
1201 continue;
1202
1203 if (id == NETSEC_RING_RX) {
1204 struct page *page = virt_to_page(desc->addr);
1205
1206 page_pool_put_full_page(dring->page_pool, page, false);
1207 } else if (id == NETSEC_RING_TX) {
1208 dma_unmap_single(priv->dev, desc->dma_addr, desc->len,
1209 DMA_TO_DEVICE);
1210 dev_kfree_skb(desc->skb);
1211 }
1212 }
1213
1214 /* Rx is currently using page_pool */
1215 if (id == NETSEC_RING_RX) {
1216 if (xdp_rxq_info_is_reg(&dring->xdp_rxq))
1217 xdp_rxq_info_unreg(&dring->xdp_rxq);
1218 page_pool_destroy(dring->page_pool);
1219 }
1220
1221 memset(dring->desc, 0, sizeof(struct netsec_desc) * DESC_NUM);
1222 memset(dring->vaddr, 0, DESC_SZ * DESC_NUM);
1223
1224 dring->head = 0;
1225 dring->tail = 0;
1226
1227 if (id == NETSEC_RING_TX)
1228 netdev_reset_queue(priv->ndev);
1229}
1230
1231static void netsec_free_dring(struct netsec_priv *priv, int id)
1232{
1233 struct netsec_desc_ring *dring = &priv->desc_ring[id];
1234
1235 if (dring->vaddr) {
1236 dma_free_coherent(priv->dev, DESC_SZ * DESC_NUM,
1237 dring->vaddr, dring->desc_dma);
1238 dring->vaddr = NULL;
1239 }
1240
1241 kfree(dring->desc);
1242 dring->desc = NULL;
1243}
1244
1245static int netsec_alloc_dring(struct netsec_priv *priv, enum ring_id id)
1246{
1247 struct netsec_desc_ring *dring = &priv->desc_ring[id];
1248
1249 dring->vaddr = dma_alloc_coherent(priv->dev, DESC_SZ * DESC_NUM,
1250 &dring->desc_dma, GFP_KERNEL);
1251 if (!dring->vaddr)
1252 goto err;
1253
1254 dring->desc = kcalloc(DESC_NUM, sizeof(*dring->desc), GFP_KERNEL);
1255 if (!dring->desc)
1256 goto err;
1257
1258 return 0;
1259err:
1260 netsec_free_dring(priv, id);
1261
1262 return -ENOMEM;
1263}
1264
1265static void netsec_setup_tx_dring(struct netsec_priv *priv)
1266{
1267 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_TX];
1268 int i;
1269
1270 for (i = 0; i < DESC_NUM; i++) {
1271 struct netsec_de *de;
1272
1273 de = dring->vaddr + (DESC_SZ * i);
1274 /* de->attr is not going to be accessed by the NIC
1275 * until netsec_set_tx_de() is called.
1276 * No need for a dma_wmb() here
1277 */
1278 de->attr = 1U << NETSEC_TX_SHIFT_OWN_FIELD;
1279 }
1280}
1281
1282static int netsec_setup_rx_dring(struct netsec_priv *priv)
1283{
1284 struct netsec_desc_ring *dring = &priv->desc_ring[NETSEC_RING_RX];
1285 struct bpf_prog *xdp_prog = READ_ONCE(priv->xdp_prog);
1286 struct page_pool_params pp_params = {
1287 .order = 0,
1288 /* internal DMA mapping in page_pool */
1289 .flags = PP_FLAG_DMA_MAP | PP_FLAG_DMA_SYNC_DEV,
1290 .pool_size = DESC_NUM,
1291 .nid = NUMA_NO_NODE,
1292 .dev = priv->dev,
1293 .dma_dir = xdp_prog ? DMA_BIDIRECTIONAL : DMA_FROM_DEVICE,
1294 .offset = NETSEC_RXBUF_HEADROOM,
1295 .max_len = NETSEC_RX_BUF_SIZE,
1296 };
1297 int i, err;
1298
1299 dring->page_pool = page_pool_create(&pp_params);
1300 if (IS_ERR(dring->page_pool)) {
1301 err = PTR_ERR(dring->page_pool);
1302 dring->page_pool = NULL;
1303 goto err_out;
1304 }
1305
1306 err = xdp_rxq_info_reg(&dring->xdp_rxq, priv->ndev, 0);
1307 if (err)
1308 goto err_out;
1309
1310 err = xdp_rxq_info_reg_mem_model(&dring->xdp_rxq, MEM_TYPE_PAGE_POOL,
1311 dring->page_pool);
1312 if (err)
1313 goto err_out;
1314
1315 for (i = 0; i < DESC_NUM; i++) {
1316 struct netsec_desc *desc = &dring->desc[i];
1317 dma_addr_t dma_handle;
1318 void *buf;
1319 u16 len;
1320
1321 buf = netsec_alloc_rx_data(priv, &dma_handle, &len);
1322
1323 if (!buf) {
1324 err = -ENOMEM;
1325 goto err_out;
1326 }
1327 desc->dma_addr = dma_handle;
1328 desc->addr = buf;
1329 desc->len = len;
1330 }
1331
1332 netsec_rx_fill(priv, 0, DESC_NUM);
1333
1334 return 0;
1335
1336err_out:
1337 netsec_uninit_pkt_dring(priv, NETSEC_RING_RX);
1338 return err;
1339}
1340
1341static int netsec_netdev_load_ucode_region(struct netsec_priv *priv, u32 reg,
1342 u32 addr_h, u32 addr_l, u32 size)
1343{
1344 u64 base = (u64)addr_h << 32 | addr_l;
1345 void __iomem *ucode;
1346 u32 i;
1347
1348 ucode = ioremap(base, size * sizeof(u32));
1349 if (!ucode)
1350 return -ENOMEM;
1351
1352 for (i = 0; i < size; i++)
1353 netsec_write(priv, reg, readl(ucode + i * 4));
1354
1355 iounmap(ucode);
1356 return 0;
1357}
1358
1359static int netsec_netdev_load_microcode(struct netsec_priv *priv)
1360{
1361 u32 addr_h, addr_l, size;
1362 int err;
1363
1364 addr_h = readl(priv->eeprom_base + NETSEC_EEPROM_HM_ME_ADDRESS_H);
1365 addr_l = readl(priv->eeprom_base + NETSEC_EEPROM_HM_ME_ADDRESS_L);
1366 size = readl(priv->eeprom_base + NETSEC_EEPROM_HM_ME_SIZE);
1367 err = netsec_netdev_load_ucode_region(priv, NETSEC_REG_DMAC_HM_CMD_BUF,
1368 addr_h, addr_l, size);
1369 if (err)
1370 return err;
1371
1372 addr_h = readl(priv->eeprom_base + NETSEC_EEPROM_MH_ME_ADDRESS_H);
1373 addr_l = readl(priv->eeprom_base + NETSEC_EEPROM_MH_ME_ADDRESS_L);
1374 size = readl(priv->eeprom_base + NETSEC_EEPROM_MH_ME_SIZE);
1375 err = netsec_netdev_load_ucode_region(priv, NETSEC_REG_DMAC_MH_CMD_BUF,
1376 addr_h, addr_l, size);
1377 if (err)
1378 return err;
1379
1380 addr_h = 0;
1381 addr_l = readl(priv->eeprom_base + NETSEC_EEPROM_PKT_ME_ADDRESS);
1382 size = readl(priv->eeprom_base + NETSEC_EEPROM_PKT_ME_SIZE);
1383 err = netsec_netdev_load_ucode_region(priv, NETSEC_REG_PKT_CMD_BUF,
1384 addr_h, addr_l, size);
1385 if (err)
1386 return err;
1387
1388 return 0;
1389}
1390
1391static int netsec_reset_hardware(struct netsec_priv *priv,
1392 bool load_ucode)
1393{
1394 u32 value;
1395 int err;
1396
1397 /* stop DMA engines */
1398 if (!netsec_read(priv, NETSEC_REG_ADDR_DIS_CORE)) {
1399 netsec_write(priv, NETSEC_REG_DMA_HM_CTRL,
1400 NETSEC_DMA_CTRL_REG_STOP);
1401 netsec_write(priv, NETSEC_REG_DMA_MH_CTRL,
1402 NETSEC_DMA_CTRL_REG_STOP);
1403
1404 while (netsec_read(priv, NETSEC_REG_DMA_HM_CTRL) &
1405 NETSEC_DMA_CTRL_REG_STOP)
1406 cpu_relax();
1407
1408 while (netsec_read(priv, NETSEC_REG_DMA_MH_CTRL) &
1409 NETSEC_DMA_CTRL_REG_STOP)
1410 cpu_relax();
1411 }
1412
1413 netsec_write(priv, NETSEC_REG_SOFT_RST, NETSEC_SOFT_RST_REG_RESET);
1414 netsec_write(priv, NETSEC_REG_SOFT_RST, NETSEC_SOFT_RST_REG_RUN);
1415 netsec_write(priv, NETSEC_REG_COM_INIT, NETSEC_COM_INIT_REG_ALL);
1416
1417 while (netsec_read(priv, NETSEC_REG_COM_INIT) != 0)
1418 cpu_relax();
1419
1420 /* set desc_start addr */
1421 netsec_write(priv, NETSEC_REG_NRM_RX_DESC_START_UP,
1422 upper_32_bits(priv->desc_ring[NETSEC_RING_RX].desc_dma));
1423 netsec_write(priv, NETSEC_REG_NRM_RX_DESC_START_LW,
1424 lower_32_bits(priv->desc_ring[NETSEC_RING_RX].desc_dma));
1425
1426 netsec_write(priv, NETSEC_REG_NRM_TX_DESC_START_UP,
1427 upper_32_bits(priv->desc_ring[NETSEC_RING_TX].desc_dma));
1428 netsec_write(priv, NETSEC_REG_NRM_TX_DESC_START_LW,
1429 lower_32_bits(priv->desc_ring[NETSEC_RING_TX].desc_dma));
1430
1431 /* set normal tx dring ring config */
1432 netsec_write(priv, NETSEC_REG_NRM_TX_CONFIG,
1433 1 << NETSEC_REG_DESC_ENDIAN);
1434 netsec_write(priv, NETSEC_REG_NRM_RX_CONFIG,
1435 1 << NETSEC_REG_DESC_ENDIAN);
1436
1437 if (load_ucode) {
1438 err = netsec_netdev_load_microcode(priv);
1439 if (err) {
1440 netif_err(priv, probe, priv->ndev,
1441 "%s: failed to load microcode (%d)\n",
1442 __func__, err);
1443 return err;
1444 }
1445 }
1446
1447 /* start DMA engines */
1448 netsec_write(priv, NETSEC_REG_DMA_TMR_CTRL, priv->freq / 1000000 - 1);
1449 netsec_write(priv, NETSEC_REG_ADDR_DIS_CORE, 0);
1450
1451 usleep_range(1000, 2000);
1452
1453 if (!(netsec_read(priv, NETSEC_REG_TOP_STATUS) &
1454 NETSEC_TOP_IRQ_REG_CODE_LOAD_END)) {
1455 netif_err(priv, probe, priv->ndev,
1456 "microengine start failed\n");
1457 return -ENXIO;
1458 }
1459 netsec_write(priv, NETSEC_REG_TOP_STATUS,
1460 NETSEC_TOP_IRQ_REG_CODE_LOAD_END);
1461
1462 value = NETSEC_PKT_CTRL_REG_MODE_NRM;
1463 if (priv->ndev->mtu > ETH_DATA_LEN)
1464 value |= NETSEC_PKT_CTRL_REG_EN_JUMBO;
1465
1466 /* change to normal mode */
1467 netsec_write(priv, NETSEC_REG_DMA_MH_CTRL, MH_CTRL__MODE_TRANS);
1468 netsec_write(priv, NETSEC_REG_PKT_CTRL, value);
1469
1470 while ((netsec_read(priv, NETSEC_REG_MODE_TRANS_COMP_STATUS) &
1471 NETSEC_MODE_TRANS_COMP_IRQ_T2N) == 0)
1472 cpu_relax();
1473
1474 /* clear any pending EMPTY/ERR irq status */
1475 netsec_write(priv, NETSEC_REG_NRM_TX_STATUS, ~0);
1476
1477 /* Disable TX & RX intr */
1478 netsec_write(priv, NETSEC_REG_INTEN_CLR, ~0);
1479
1480 return 0;
1481}
1482
1483static int netsec_start_gmac(struct netsec_priv *priv)
1484{
1485 struct phy_device *phydev = priv->ndev->phydev;
1486 u32 value = 0;
1487 int ret;
1488
1489 if (phydev->speed != SPEED_1000)
1490 value = (NETSEC_GMAC_MCR_REG_CST |
1491 NETSEC_GMAC_MCR_REG_HALF_DUPLEX_COMMON);
1492
1493 if (netsec_mac_write(priv, GMAC_REG_MCR, value))
1494 return -ETIMEDOUT;
1495 if (netsec_mac_write(priv, GMAC_REG_BMR,
1496 NETSEC_GMAC_BMR_REG_RESET))
1497 return -ETIMEDOUT;
1498
1499 /* Wait soft reset */
1500 usleep_range(1000, 5000);
1501
1502 ret = netsec_mac_read(priv, GMAC_REG_BMR, &value);
1503 if (ret)
1504 return ret;
1505 if (value & NETSEC_GMAC_BMR_REG_SWR)
1506 return -EAGAIN;
1507
1508 netsec_write(priv, MAC_REG_DESC_SOFT_RST, 1);
1509 if (netsec_wait_while_busy(priv, MAC_REG_DESC_SOFT_RST, 1))
1510 return -ETIMEDOUT;
1511
1512 netsec_write(priv, MAC_REG_DESC_INIT, 1);
1513 if (netsec_wait_while_busy(priv, MAC_REG_DESC_INIT, 1))
1514 return -ETIMEDOUT;
1515
1516 if (netsec_mac_write(priv, GMAC_REG_BMR,
1517 NETSEC_GMAC_BMR_REG_COMMON))
1518 return -ETIMEDOUT;
1519 if (netsec_mac_write(priv, GMAC_REG_RDLAR,
1520 NETSEC_GMAC_RDLAR_REG_COMMON))
1521 return -ETIMEDOUT;
1522 if (netsec_mac_write(priv, GMAC_REG_TDLAR,
1523 NETSEC_GMAC_TDLAR_REG_COMMON))
1524 return -ETIMEDOUT;
1525 if (netsec_mac_write(priv, GMAC_REG_MFFR, 0x80000001))
1526 return -ETIMEDOUT;
1527
1528 ret = netsec_mac_update_to_phy_state(priv);
1529 if (ret)
1530 return ret;
1531
1532 ret = netsec_mac_read(priv, GMAC_REG_OMR, &value);
1533 if (ret)
1534 return ret;
1535
1536 value |= NETSEC_GMAC_OMR_REG_SR;
1537 value |= NETSEC_GMAC_OMR_REG_ST;
1538
1539 netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_CLR, ~0);
1540 netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_CLR, ~0);
1541
1542 netsec_et_set_coalesce(priv->ndev, &priv->et_coalesce);
1543
1544 if (netsec_mac_write(priv, GMAC_REG_OMR, value))
1545 return -ETIMEDOUT;
1546
1547 return 0;
1548}
1549
1550static int netsec_stop_gmac(struct netsec_priv *priv)
1551{
1552 u32 value;
1553 int ret;
1554
1555 ret = netsec_mac_read(priv, GMAC_REG_OMR, &value);
1556 if (ret)
1557 return ret;
1558 value &= ~NETSEC_GMAC_OMR_REG_SR;
1559 value &= ~NETSEC_GMAC_OMR_REG_ST;
1560
1561 /* disable all interrupts */
1562 netsec_write(priv, NETSEC_REG_NRM_RX_INTEN_CLR, ~0);
1563 netsec_write(priv, NETSEC_REG_NRM_TX_INTEN_CLR, ~0);
1564
1565 return netsec_mac_write(priv, GMAC_REG_OMR, value);
1566}
1567
1568static void netsec_phy_adjust_link(struct net_device *ndev)
1569{
1570 struct netsec_priv *priv = netdev_priv(ndev);
1571
1572 if (ndev->phydev->link)
1573 netsec_start_gmac(priv);
1574 else
1575 netsec_stop_gmac(priv);
1576
1577 phy_print_status(ndev->phydev);
1578}
1579
1580static irqreturn_t netsec_irq_handler(int irq, void *dev_id)
1581{
1582 struct netsec_priv *priv = dev_id;
1583 u32 val, status = netsec_read(priv, NETSEC_REG_TOP_STATUS);
1584 unsigned long flags;
1585
1586 /* Disable interrupts */
1587 if (status & NETSEC_IRQ_TX) {
1588 val = netsec_read(priv, NETSEC_REG_NRM_TX_STATUS);
1589 netsec_write(priv, NETSEC_REG_NRM_TX_STATUS, val);
1590 }
1591 if (status & NETSEC_IRQ_RX) {
1592 val = netsec_read(priv, NETSEC_REG_NRM_RX_STATUS);
1593 netsec_write(priv, NETSEC_REG_NRM_RX_STATUS, val);
1594 }
1595
1596 spin_lock_irqsave(&priv->reglock, flags);
1597 netsec_write(priv, NETSEC_REG_INTEN_CLR, NETSEC_IRQ_RX | NETSEC_IRQ_TX);
1598 spin_unlock_irqrestore(&priv->reglock, flags);
1599
1600 napi_schedule(&priv->napi);
1601
1602 return IRQ_HANDLED;
1603}
1604
1605static int netsec_netdev_open(struct net_device *ndev)
1606{
1607 struct netsec_priv *priv = netdev_priv(ndev);
1608 int ret;
1609
1610 pm_runtime_get_sync(priv->dev);
1611
1612 netsec_setup_tx_dring(priv);
1613 ret = netsec_setup_rx_dring(priv);
1614 if (ret) {
1615 netif_err(priv, probe, priv->ndev,
1616 "%s: fail setup ring\n", __func__);
1617 goto err1;
1618 }
1619
1620 ret = request_irq(priv->ndev->irq, netsec_irq_handler,
1621 IRQF_SHARED, "netsec", priv);
1622 if (ret) {
1623 netif_err(priv, drv, priv->ndev, "request_irq failed\n");
1624 goto err2;
1625 }
1626
1627 if (dev_of_node(priv->dev)) {
1628 if (!of_phy_connect(priv->ndev, priv->phy_np,
1629 netsec_phy_adjust_link, 0,
1630 priv->phy_interface)) {
1631 netif_err(priv, link, priv->ndev, "missing PHY\n");
1632 ret = -ENODEV;
1633 goto err3;
1634 }
1635 } else {
1636 ret = phy_connect_direct(priv->ndev, priv->phydev,
1637 netsec_phy_adjust_link,
1638 priv->phy_interface);
1639 if (ret) {
1640 netif_err(priv, link, priv->ndev,
1641 "phy_connect_direct() failed (%d)\n", ret);
1642 goto err3;
1643 }
1644 }
1645
1646 phy_start(ndev->phydev);
1647
1648 netsec_start_gmac(priv);
1649 napi_enable(&priv->napi);
1650 netif_start_queue(ndev);
1651
1652 /* Enable TX+RX intr. */
1653 netsec_write(priv, NETSEC_REG_INTEN_SET, NETSEC_IRQ_RX | NETSEC_IRQ_TX);
1654
1655 return 0;
1656err3:
1657 free_irq(priv->ndev->irq, priv);
1658err2:
1659 netsec_uninit_pkt_dring(priv, NETSEC_RING_RX);
1660err1:
1661 pm_runtime_put_sync(priv->dev);
1662 return ret;
1663}
1664
1665static int netsec_netdev_stop(struct net_device *ndev)
1666{
1667 int ret;
1668 struct netsec_priv *priv = netdev_priv(ndev);
1669
1670 netif_stop_queue(priv->ndev);
1671 dma_wmb();
1672
1673 napi_disable(&priv->napi);
1674
1675 netsec_write(priv, NETSEC_REG_INTEN_CLR, ~0);
1676 netsec_stop_gmac(priv);
1677
1678 free_irq(priv->ndev->irq, priv);
1679
1680 netsec_uninit_pkt_dring(priv, NETSEC_RING_TX);
1681 netsec_uninit_pkt_dring(priv, NETSEC_RING_RX);
1682
1683 phy_stop(ndev->phydev);
1684 phy_disconnect(ndev->phydev);
1685
1686 ret = netsec_reset_hardware(priv, false);
1687
1688 pm_runtime_put_sync(priv->dev);
1689
1690 return ret;
1691}
1692
1693static int netsec_netdev_init(struct net_device *ndev)
1694{
1695 struct netsec_priv *priv = netdev_priv(ndev);
1696 int ret;
1697 u16 data;
1698
1699 BUILD_BUG_ON_NOT_POWER_OF_2(DESC_NUM);
1700
1701 ret = netsec_alloc_dring(priv, NETSEC_RING_TX);
1702 if (ret)
1703 return ret;
1704
1705 ret = netsec_alloc_dring(priv, NETSEC_RING_RX);
1706 if (ret)
1707 goto err1;
1708
1709 /* set phy power down */
1710 data = netsec_phy_read(priv->mii_bus, priv->phy_addr, MII_BMCR) |
1711 BMCR_PDOWN;
1712 netsec_phy_write(priv->mii_bus, priv->phy_addr, MII_BMCR, data);
1713
1714 ret = netsec_reset_hardware(priv, true);
1715 if (ret)
1716 goto err2;
1717
1718 spin_lock_init(&priv->desc_ring[NETSEC_RING_TX].lock);
1719 spin_lock_init(&priv->desc_ring[NETSEC_RING_RX].lock);
1720
1721 return 0;
1722err2:
1723 netsec_free_dring(priv, NETSEC_RING_RX);
1724err1:
1725 netsec_free_dring(priv, NETSEC_RING_TX);
1726 return ret;
1727}
1728
1729static void netsec_netdev_uninit(struct net_device *ndev)
1730{
1731 struct netsec_priv *priv = netdev_priv(ndev);
1732
1733 netsec_free_dring(priv, NETSEC_RING_RX);
1734 netsec_free_dring(priv, NETSEC_RING_TX);
1735}
1736
1737static int netsec_netdev_set_features(struct net_device *ndev,
1738 netdev_features_t features)
1739{
1740 struct netsec_priv *priv = netdev_priv(ndev);
1741
1742 priv->rx_cksum_offload_flag = !!(features & NETIF_F_RXCSUM);
1743
1744 return 0;
1745}
1746
1747static int netsec_xdp_xmit(struct net_device *ndev, int n,
1748 struct xdp_frame **frames, u32 flags)
1749{
1750 struct netsec_priv *priv = netdev_priv(ndev);
1751 struct netsec_desc_ring *tx_ring = &priv->desc_ring[NETSEC_RING_TX];
1752 int drops = 0;
1753 int i;
1754
1755 if (unlikely(flags & ~XDP_XMIT_FLAGS_MASK))
1756 return -EINVAL;
1757
1758 spin_lock(&tx_ring->lock);
1759 for (i = 0; i < n; i++) {
1760 struct xdp_frame *xdpf = frames[i];
1761 int err;
1762
1763 err = netsec_xdp_queue_one(priv, xdpf, true);
1764 if (err != NETSEC_XDP_TX) {
1765 xdp_return_frame_rx_napi(xdpf);
1766 drops++;
1767 } else {
1768 tx_ring->xdp_xmit++;
1769 }
1770 }
1771 spin_unlock(&tx_ring->lock);
1772
1773 if (unlikely(flags & XDP_XMIT_FLUSH)) {
1774 netsec_xdp_ring_tx_db(priv, tx_ring->xdp_xmit);
1775 tx_ring->xdp_xmit = 0;
1776 }
1777
1778 return n - drops;
1779}
1780
1781static int netsec_xdp_setup(struct netsec_priv *priv, struct bpf_prog *prog,
1782 struct netlink_ext_ack *extack)
1783{
1784 struct net_device *dev = priv->ndev;
1785 struct bpf_prog *old_prog;
1786
1787 /* For now just support only the usual MTU sized frames */
1788 if (prog && dev->mtu > 1500) {
1789 NL_SET_ERR_MSG_MOD(extack, "Jumbo frames not supported on XDP");
1790 return -EOPNOTSUPP;
1791 }
1792
1793 if (netif_running(dev))
1794 netsec_netdev_stop(dev);
1795
1796 /* Detach old prog, if any */
1797 old_prog = xchg(&priv->xdp_prog, prog);
1798 if (old_prog)
1799 bpf_prog_put(old_prog);
1800
1801 if (netif_running(dev))
1802 netsec_netdev_open(dev);
1803
1804 return 0;
1805}
1806
1807static int netsec_xdp(struct net_device *ndev, struct netdev_bpf *xdp)
1808{
1809 struct netsec_priv *priv = netdev_priv(ndev);
1810
1811 switch (xdp->command) {
1812 case XDP_SETUP_PROG:
1813 return netsec_xdp_setup(priv, xdp->prog, xdp->extack);
1814 default:
1815 return -EINVAL;
1816 }
1817}
1818
1819static const struct net_device_ops netsec_netdev_ops = {
1820 .ndo_init = netsec_netdev_init,
1821 .ndo_uninit = netsec_netdev_uninit,
1822 .ndo_open = netsec_netdev_open,
1823 .ndo_stop = netsec_netdev_stop,
1824 .ndo_start_xmit = netsec_netdev_start_xmit,
1825 .ndo_set_features = netsec_netdev_set_features,
1826 .ndo_set_mac_address = eth_mac_addr,
1827 .ndo_validate_addr = eth_validate_addr,
1828 .ndo_do_ioctl = phy_do_ioctl,
1829 .ndo_xdp_xmit = netsec_xdp_xmit,
1830 .ndo_bpf = netsec_xdp,
1831};
1832
1833static int netsec_of_probe(struct platform_device *pdev,
1834 struct netsec_priv *priv, u32 *phy_addr)
1835{
1836 priv->phy_np = of_parse_phandle(pdev->dev.of_node, "phy-handle", 0);
1837 if (!priv->phy_np) {
1838 dev_err(&pdev->dev, "missing required property 'phy-handle'\n");
1839 return -EINVAL;
1840 }
1841
1842 *phy_addr = of_mdio_parse_addr(&pdev->dev, priv->phy_np);
1843
1844 priv->clk = devm_clk_get(&pdev->dev, NULL); /* get by 'phy_ref_clk' */
1845 if (IS_ERR(priv->clk)) {
1846 dev_err(&pdev->dev, "phy_ref_clk not found\n");
1847 return PTR_ERR(priv->clk);
1848 }
1849 priv->freq = clk_get_rate(priv->clk);
1850
1851 return 0;
1852}
1853
1854static int netsec_acpi_probe(struct platform_device *pdev,
1855 struct netsec_priv *priv, u32 *phy_addr)
1856{
1857 int ret;
1858
1859 if (!IS_ENABLED(CONFIG_ACPI))
1860 return -ENODEV;
1861
1862 ret = device_property_read_u32(&pdev->dev, "phy-channel", phy_addr);
1863 if (ret) {
1864 dev_err(&pdev->dev,
1865 "missing required property 'phy-channel'\n");
1866 return ret;
1867 }
1868
1869 ret = device_property_read_u32(&pdev->dev,
1870 "socionext,phy-clock-frequency",
1871 &priv->freq);
1872 if (ret)
1873 dev_err(&pdev->dev,
1874 "missing required property 'socionext,phy-clock-frequency'\n");
1875 return ret;
1876}
1877
1878static void netsec_unregister_mdio(struct netsec_priv *priv)
1879{
1880 struct phy_device *phydev = priv->phydev;
1881
1882 if (!dev_of_node(priv->dev) && phydev) {
1883 phy_device_remove(phydev);
1884 phy_device_free(phydev);
1885 }
1886
1887 mdiobus_unregister(priv->mii_bus);
1888}
1889
1890static int netsec_register_mdio(struct netsec_priv *priv, u32 phy_addr)
1891{
1892 struct mii_bus *bus;
1893 int ret;
1894
1895 bus = devm_mdiobus_alloc(priv->dev);
1896 if (!bus)
1897 return -ENOMEM;
1898
1899 snprintf(bus->id, MII_BUS_ID_SIZE, "%s", dev_name(priv->dev));
1900 bus->priv = priv;
1901 bus->name = "SNI NETSEC MDIO";
1902 bus->read = netsec_phy_read;
1903 bus->write = netsec_phy_write;
1904 bus->parent = priv->dev;
1905 priv->mii_bus = bus;
1906
1907 if (dev_of_node(priv->dev)) {
1908 struct device_node *mdio_node, *parent = dev_of_node(priv->dev);
1909
1910 mdio_node = of_get_child_by_name(parent, "mdio");
1911 if (mdio_node) {
1912 parent = mdio_node;
1913 } else {
1914 /* older f/w doesn't populate the mdio subnode,
1915 * allow relaxed upgrade of f/w in due time.
1916 */
1917 dev_info(priv->dev, "Upgrade f/w for mdio subnode!\n");
1918 }
1919
1920 ret = of_mdiobus_register(bus, parent);
1921 of_node_put(mdio_node);
1922
1923 if (ret) {
1924 dev_err(priv->dev, "mdiobus register err(%d)\n", ret);
1925 return ret;
1926 }
1927 } else {
1928 /* Mask out all PHYs from auto probing. */
1929 bus->phy_mask = ~0;
1930 ret = mdiobus_register(bus);
1931 if (ret) {
1932 dev_err(priv->dev, "mdiobus register err(%d)\n", ret);
1933 return ret;
1934 }
1935
1936 priv->phydev = get_phy_device(bus, phy_addr, false);
1937 if (IS_ERR(priv->phydev)) {
1938 ret = PTR_ERR(priv->phydev);
1939 dev_err(priv->dev, "get_phy_device err(%d)\n", ret);
1940 priv->phydev = NULL;
1941 return -ENODEV;
1942 }
1943
1944 ret = phy_device_register(priv->phydev);
1945 if (ret) {
1946 mdiobus_unregister(bus);
1947 dev_err(priv->dev,
1948 "phy_device_register err(%d)\n", ret);
1949 }
1950 }
1951
1952 return ret;
1953}
1954
1955static int netsec_probe(struct platform_device *pdev)
1956{
1957 struct resource *mmio_res, *eeprom_res, *irq_res;
1958 u8 *mac, macbuf[ETH_ALEN];
1959 struct netsec_priv *priv;
1960 u32 hw_ver, phy_addr = 0;
1961 struct net_device *ndev;
1962 int ret;
1963
1964 mmio_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1965 if (!mmio_res) {
1966 dev_err(&pdev->dev, "No MMIO resource found.\n");
1967 return -ENODEV;
1968 }
1969
1970 eeprom_res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
1971 if (!eeprom_res) {
1972 dev_info(&pdev->dev, "No EEPROM resource found.\n");
1973 return -ENODEV;
1974 }
1975
1976 irq_res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
1977 if (!irq_res) {
1978 dev_err(&pdev->dev, "No IRQ resource found.\n");
1979 return -ENODEV;
1980 }
1981
1982 ndev = alloc_etherdev(sizeof(*priv));
1983 if (!ndev)
1984 return -ENOMEM;
1985
1986 priv = netdev_priv(ndev);
1987
1988 spin_lock_init(&priv->reglock);
1989 SET_NETDEV_DEV(ndev, &pdev->dev);
1990 platform_set_drvdata(pdev, priv);
1991 ndev->irq = irq_res->start;
1992 priv->dev = &pdev->dev;
1993 priv->ndev = ndev;
1994
1995 priv->msg_enable = NETIF_MSG_TX_ERR | NETIF_MSG_HW | NETIF_MSG_DRV |
1996 NETIF_MSG_LINK | NETIF_MSG_PROBE;
1997
1998 priv->phy_interface = device_get_phy_mode(&pdev->dev);
1999 if ((int)priv->phy_interface < 0) {
2000 dev_err(&pdev->dev, "missing required property 'phy-mode'\n");
2001 ret = -ENODEV;
2002 goto free_ndev;
2003 }
2004
2005 priv->ioaddr = devm_ioremap(&pdev->dev, mmio_res->start,
2006 resource_size(mmio_res));
2007 if (!priv->ioaddr) {
2008 dev_err(&pdev->dev, "devm_ioremap() failed\n");
2009 ret = -ENXIO;
2010 goto free_ndev;
2011 }
2012
2013 priv->eeprom_base = devm_ioremap(&pdev->dev, eeprom_res->start,
2014 resource_size(eeprom_res));
2015 if (!priv->eeprom_base) {
2016 dev_err(&pdev->dev, "devm_ioremap() failed for EEPROM\n");
2017 ret = -ENXIO;
2018 goto free_ndev;
2019 }
2020
2021 mac = device_get_mac_address(&pdev->dev, macbuf, sizeof(macbuf));
2022 if (mac)
2023 ether_addr_copy(ndev->dev_addr, mac);
2024
2025 if (priv->eeprom_base &&
2026 (!mac || !is_valid_ether_addr(ndev->dev_addr))) {
2027 void __iomem *macp = priv->eeprom_base +
2028 NETSEC_EEPROM_MAC_ADDRESS;
2029
2030 ndev->dev_addr[0] = readb(macp + 3);
2031 ndev->dev_addr[1] = readb(macp + 2);
2032 ndev->dev_addr[2] = readb(macp + 1);
2033 ndev->dev_addr[3] = readb(macp + 0);
2034 ndev->dev_addr[4] = readb(macp + 7);
2035 ndev->dev_addr[5] = readb(macp + 6);
2036 }
2037
2038 if (!is_valid_ether_addr(ndev->dev_addr)) {
2039 dev_warn(&pdev->dev, "No MAC address found, using random\n");
2040 eth_hw_addr_random(ndev);
2041 }
2042
2043 if (dev_of_node(&pdev->dev))
2044 ret = netsec_of_probe(pdev, priv, &phy_addr);
2045 else
2046 ret = netsec_acpi_probe(pdev, priv, &phy_addr);
2047 if (ret)
2048 goto free_ndev;
2049
2050 priv->phy_addr = phy_addr;
2051
2052 if (!priv->freq) {
2053 dev_err(&pdev->dev, "missing PHY reference clock frequency\n");
2054 ret = -ENODEV;
2055 goto free_ndev;
2056 }
2057
2058 /* default for throughput */
2059 priv->et_coalesce.rx_coalesce_usecs = 500;
2060 priv->et_coalesce.rx_max_coalesced_frames = 8;
2061 priv->et_coalesce.tx_coalesce_usecs = 500;
2062 priv->et_coalesce.tx_max_coalesced_frames = 8;
2063
2064 ret = device_property_read_u32(&pdev->dev, "max-frame-size",
2065 &ndev->max_mtu);
2066 if (ret < 0)
2067 ndev->max_mtu = ETH_DATA_LEN;
2068
2069 /* runtime_pm coverage just for probe, open/close also cover it */
2070 pm_runtime_enable(&pdev->dev);
2071 pm_runtime_get_sync(&pdev->dev);
2072
2073 hw_ver = netsec_read(priv, NETSEC_REG_F_TAIKI_VER);
2074 /* this driver only supports F_TAIKI style NETSEC */
2075 if (NETSEC_F_NETSEC_VER_MAJOR_NUM(hw_ver) !=
2076 NETSEC_F_NETSEC_VER_MAJOR_NUM(NETSEC_REG_NETSEC_VER_F_TAIKI)) {
2077 ret = -ENODEV;
2078 goto pm_disable;
2079 }
2080
2081 dev_info(&pdev->dev, "hardware revision %d.%d\n",
2082 hw_ver >> 16, hw_ver & 0xffff);
2083
2084 netif_napi_add(ndev, &priv->napi, netsec_napi_poll, NAPI_POLL_WEIGHT);
2085
2086 ndev->netdev_ops = &netsec_netdev_ops;
2087 ndev->ethtool_ops = &netsec_ethtool_ops;
2088
2089 ndev->features |= NETIF_F_HIGHDMA | NETIF_F_RXCSUM | NETIF_F_GSO |
2090 NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
2091 ndev->hw_features = ndev->features;
2092
2093 priv->rx_cksum_offload_flag = true;
2094
2095 ret = netsec_register_mdio(priv, phy_addr);
2096 if (ret)
2097 goto unreg_napi;
2098
2099 if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(40)))
2100 dev_warn(&pdev->dev, "Failed to set DMA mask\n");
2101
2102 ret = register_netdev(ndev);
2103 if (ret) {
2104 netif_err(priv, probe, ndev, "register_netdev() failed\n");
2105 goto unreg_mii;
2106 }
2107
2108 pm_runtime_put_sync(&pdev->dev);
2109 return 0;
2110
2111unreg_mii:
2112 netsec_unregister_mdio(priv);
2113unreg_napi:
2114 netif_napi_del(&priv->napi);
2115pm_disable:
2116 pm_runtime_put_sync(&pdev->dev);
2117 pm_runtime_disable(&pdev->dev);
2118free_ndev:
2119 free_netdev(ndev);
2120 dev_err(&pdev->dev, "init failed\n");
2121
2122 return ret;
2123}
2124
2125static int netsec_remove(struct platform_device *pdev)
2126{
2127 struct netsec_priv *priv = platform_get_drvdata(pdev);
2128
2129 unregister_netdev(priv->ndev);
2130
2131 netsec_unregister_mdio(priv);
2132
2133 netif_napi_del(&priv->napi);
2134
2135 pm_runtime_disable(&pdev->dev);
2136 free_netdev(priv->ndev);
2137
2138 return 0;
2139}
2140
2141#ifdef CONFIG_PM
2142static int netsec_runtime_suspend(struct device *dev)
2143{
2144 struct netsec_priv *priv = dev_get_drvdata(dev);
2145
2146 netsec_write(priv, NETSEC_REG_CLK_EN, 0);
2147
2148 clk_disable_unprepare(priv->clk);
2149
2150 return 0;
2151}
2152
2153static int netsec_runtime_resume(struct device *dev)
2154{
2155 struct netsec_priv *priv = dev_get_drvdata(dev);
2156
2157 clk_prepare_enable(priv->clk);
2158
2159 netsec_write(priv, NETSEC_REG_CLK_EN, NETSEC_CLK_EN_REG_DOM_D |
2160 NETSEC_CLK_EN_REG_DOM_C |
2161 NETSEC_CLK_EN_REG_DOM_G);
2162 return 0;
2163}
2164#endif
2165
2166static const struct dev_pm_ops netsec_pm_ops = {
2167 SET_RUNTIME_PM_OPS(netsec_runtime_suspend, netsec_runtime_resume, NULL)
2168};
2169
2170static const struct of_device_id netsec_dt_ids[] = {
2171 { .compatible = "socionext,synquacer-netsec" },
2172 { }
2173};
2174MODULE_DEVICE_TABLE(of, netsec_dt_ids);
2175
2176#ifdef CONFIG_ACPI
2177static const struct acpi_device_id netsec_acpi_ids[] = {
2178 { "SCX0001" },
2179 { }
2180};
2181MODULE_DEVICE_TABLE(acpi, netsec_acpi_ids);
2182#endif
2183
2184static struct platform_driver netsec_driver = {
2185 .probe = netsec_probe,
2186 .remove = netsec_remove,
2187 .driver = {
2188 .name = "netsec",
2189 .pm = &netsec_pm_ops,
2190 .of_match_table = netsec_dt_ids,
2191 .acpi_match_table = ACPI_PTR(netsec_acpi_ids),
2192 },
2193};
2194module_platform_driver(netsec_driver);
2195
2196MODULE_AUTHOR("Jassi Brar <jaswinder.singh@linaro.org>");
2197MODULE_AUTHOR("Ard Biesheuvel <ard.biesheuvel@linaro.org>");
2198MODULE_DESCRIPTION("NETSEC Ethernet driver");
2199MODULE_LICENSE("GPL");