2 * Broadcom GENET (Gigabit Ethernet) controller driver
4 * Copyright (c) 2014 Broadcom Corporation
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
11 #define pr_fmt(fmt) "bcmgenet: " fmt
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/sched.h>
16 #include <linux/types.h>
17 #include <linux/fcntl.h>
18 #include <linux/interrupt.h>
19 #include <linux/string.h>
20 #include <linux/if_ether.h>
21 #include <linux/init.h>
22 #include <linux/errno.h>
23 #include <linux/delay.h>
24 #include <linux/platform_device.h>
25 #include <linux/dma-mapping.h>
27 #include <linux/clk.h>
29 #include <linux/of_address.h>
30 #include <linux/of_irq.h>
31 #include <linux/of_net.h>
32 #include <linux/of_platform.h>
35 #include <linux/mii.h>
36 #include <linux/ethtool.h>
37 #include <linux/netdevice.h>
38 #include <linux/inetdevice.h>
39 #include <linux/etherdevice.h>
40 #include <linux/skbuff.h>
43 #include <linux/ipv6.h>
44 #include <linux/phy.h>
45 #include <linux/platform_data/bcmgenet.h>
47 #include <asm/unaligned.h>
51 /* Maximum number of hardware queues, downsized if needed */
52 #define GENET_MAX_MQ_CNT 4
54 /* Default highest priority queue for multi queue support */
55 #define GENET_Q0_PRIORITY 0
57 #define GENET_Q16_RX_BD_CNT \
58 (TOTAL_DESC - priv->hw_params->rx_queues * priv->hw_params->rx_bds_per_q)
59 #define GENET_Q16_TX_BD_CNT \
60 (TOTAL_DESC - priv->hw_params->tx_queues * priv->hw_params->tx_bds_per_q)
62 #define RX_BUF_LENGTH 2048
63 #define SKB_ALIGNMENT 32
65 /* Tx/Rx DMA register offset, skip 256 descriptors */
66 #define WORDS_PER_BD(p) (p->hw_params->words_per_bd)
67 #define DMA_DESC_SIZE (WORDS_PER_BD(priv) * sizeof(u32))
69 #define GENET_TDMA_REG_OFF (priv->hw_params->tdma_offset + \
70 TOTAL_DESC * DMA_DESC_SIZE)
72 #define GENET_RDMA_REG_OFF (priv->hw_params->rdma_offset + \
73 TOTAL_DESC * DMA_DESC_SIZE)
75 static inline void dmadesc_set_length_status(struct bcmgenet_priv *priv,
76 void __iomem *d, u32 value)
78 __raw_writel(value, d + DMA_DESC_LENGTH_STATUS);
81 static inline u32 dmadesc_get_length_status(struct bcmgenet_priv *priv,
84 return __raw_readl(d + DMA_DESC_LENGTH_STATUS);
87 static inline void dmadesc_set_addr(struct bcmgenet_priv *priv,
91 __raw_writel(lower_32_bits(addr), d + DMA_DESC_ADDRESS_LO);
93 /* Register writes to GISB bus can take couple hundred nanoseconds
94 * and are done for each packet, save these expensive writes unless
95 * the platform is explicitly configured for 64-bits/LPAE.
97 #ifdef CONFIG_PHYS_ADDR_T_64BIT
98 if (priv->hw_params->flags & GENET_HAS_40BITS)
99 __raw_writel(upper_32_bits(addr), d + DMA_DESC_ADDRESS_HI);
103 /* Combined address + length/status setter */
104 static inline void dmadesc_set(struct bcmgenet_priv *priv,
105 void __iomem *d, dma_addr_t addr, u32 val)
107 dmadesc_set_length_status(priv, d, val);
108 dmadesc_set_addr(priv, d, addr);
111 static inline dma_addr_t dmadesc_get_addr(struct bcmgenet_priv *priv,
116 addr = __raw_readl(d + DMA_DESC_ADDRESS_LO);
118 /* Register writes to GISB bus can take couple hundred nanoseconds
119 * and are done for each packet, save these expensive writes unless
120 * the platform is explicitly configured for 64-bits/LPAE.
122 #ifdef CONFIG_PHYS_ADDR_T_64BIT
123 if (priv->hw_params->flags & GENET_HAS_40BITS)
124 addr |= (u64)__raw_readl(d + DMA_DESC_ADDRESS_HI) << 32;
129 #define GENET_VER_FMT "%1d.%1d EPHY: 0x%04x"
131 #define GENET_MSG_DEFAULT (NETIF_MSG_DRV | NETIF_MSG_PROBE | \
134 static inline u32 bcmgenet_rbuf_ctrl_get(struct bcmgenet_priv *priv)
136 if (GENET_IS_V1(priv))
137 return bcmgenet_rbuf_readl(priv, RBUF_FLUSH_CTRL_V1);
139 return bcmgenet_sys_readl(priv, SYS_RBUF_FLUSH_CTRL);
142 static inline void bcmgenet_rbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
144 if (GENET_IS_V1(priv))
145 bcmgenet_rbuf_writel(priv, val, RBUF_FLUSH_CTRL_V1);
147 bcmgenet_sys_writel(priv, val, SYS_RBUF_FLUSH_CTRL);
150 /* These macros are defined to deal with register map change
151 * between GENET1.1 and GENET2. Only those currently being used
152 * by driver are defined.
154 static inline u32 bcmgenet_tbuf_ctrl_get(struct bcmgenet_priv *priv)
156 if (GENET_IS_V1(priv))
157 return bcmgenet_rbuf_readl(priv, TBUF_CTRL_V1);
159 return __raw_readl(priv->base +
160 priv->hw_params->tbuf_offset + TBUF_CTRL);
163 static inline void bcmgenet_tbuf_ctrl_set(struct bcmgenet_priv *priv, u32 val)
165 if (GENET_IS_V1(priv))
166 bcmgenet_rbuf_writel(priv, val, TBUF_CTRL_V1);
168 __raw_writel(val, priv->base +
169 priv->hw_params->tbuf_offset + TBUF_CTRL);
172 static inline u32 bcmgenet_bp_mc_get(struct bcmgenet_priv *priv)
174 if (GENET_IS_V1(priv))
175 return bcmgenet_rbuf_readl(priv, TBUF_BP_MC_V1);
177 return __raw_readl(priv->base +
178 priv->hw_params->tbuf_offset + TBUF_BP_MC);
181 static inline void bcmgenet_bp_mc_set(struct bcmgenet_priv *priv, u32 val)
183 if (GENET_IS_V1(priv))
184 bcmgenet_rbuf_writel(priv, val, TBUF_BP_MC_V1);
186 __raw_writel(val, priv->base +
187 priv->hw_params->tbuf_offset + TBUF_BP_MC);
190 /* RX/TX DMA register accessors */
227 static const u8 bcmgenet_dma_regs_v3plus[] = {
228 [DMA_RING_CFG] = 0x00,
231 [DMA_SCB_BURST_SIZE] = 0x0C,
232 [DMA_ARB_CTRL] = 0x2C,
233 [DMA_PRIORITY_0] = 0x30,
234 [DMA_PRIORITY_1] = 0x34,
235 [DMA_PRIORITY_2] = 0x38,
236 [DMA_RING0_TIMEOUT] = 0x2C,
237 [DMA_RING1_TIMEOUT] = 0x30,
238 [DMA_RING2_TIMEOUT] = 0x34,
239 [DMA_RING3_TIMEOUT] = 0x38,
240 [DMA_RING4_TIMEOUT] = 0x3c,
241 [DMA_RING5_TIMEOUT] = 0x40,
242 [DMA_RING6_TIMEOUT] = 0x44,
243 [DMA_RING7_TIMEOUT] = 0x48,
244 [DMA_RING8_TIMEOUT] = 0x4c,
245 [DMA_RING9_TIMEOUT] = 0x50,
246 [DMA_RING10_TIMEOUT] = 0x54,
247 [DMA_RING11_TIMEOUT] = 0x58,
248 [DMA_RING12_TIMEOUT] = 0x5c,
249 [DMA_RING13_TIMEOUT] = 0x60,
250 [DMA_RING14_TIMEOUT] = 0x64,
251 [DMA_RING15_TIMEOUT] = 0x68,
252 [DMA_RING16_TIMEOUT] = 0x6C,
253 [DMA_INDEX2RING_0] = 0x70,
254 [DMA_INDEX2RING_1] = 0x74,
255 [DMA_INDEX2RING_2] = 0x78,
256 [DMA_INDEX2RING_3] = 0x7C,
257 [DMA_INDEX2RING_4] = 0x80,
258 [DMA_INDEX2RING_5] = 0x84,
259 [DMA_INDEX2RING_6] = 0x88,
260 [DMA_INDEX2RING_7] = 0x8C,
263 static const u8 bcmgenet_dma_regs_v2[] = {
264 [DMA_RING_CFG] = 0x00,
267 [DMA_SCB_BURST_SIZE] = 0x0C,
268 [DMA_ARB_CTRL] = 0x30,
269 [DMA_PRIORITY_0] = 0x34,
270 [DMA_PRIORITY_1] = 0x38,
271 [DMA_PRIORITY_2] = 0x3C,
272 [DMA_RING0_TIMEOUT] = 0x2C,
273 [DMA_RING1_TIMEOUT] = 0x30,
274 [DMA_RING2_TIMEOUT] = 0x34,
275 [DMA_RING3_TIMEOUT] = 0x38,
276 [DMA_RING4_TIMEOUT] = 0x3c,
277 [DMA_RING5_TIMEOUT] = 0x40,
278 [DMA_RING6_TIMEOUT] = 0x44,
279 [DMA_RING7_TIMEOUT] = 0x48,
280 [DMA_RING8_TIMEOUT] = 0x4c,
281 [DMA_RING9_TIMEOUT] = 0x50,
282 [DMA_RING10_TIMEOUT] = 0x54,
283 [DMA_RING11_TIMEOUT] = 0x58,
284 [DMA_RING12_TIMEOUT] = 0x5c,
285 [DMA_RING13_TIMEOUT] = 0x60,
286 [DMA_RING14_TIMEOUT] = 0x64,
287 [DMA_RING15_TIMEOUT] = 0x68,
288 [DMA_RING16_TIMEOUT] = 0x6C,
291 static const u8 bcmgenet_dma_regs_v1[] = {
294 [DMA_SCB_BURST_SIZE] = 0x0C,
295 [DMA_ARB_CTRL] = 0x30,
296 [DMA_PRIORITY_0] = 0x34,
297 [DMA_PRIORITY_1] = 0x38,
298 [DMA_PRIORITY_2] = 0x3C,
299 [DMA_RING0_TIMEOUT] = 0x2C,
300 [DMA_RING1_TIMEOUT] = 0x30,
301 [DMA_RING2_TIMEOUT] = 0x34,
302 [DMA_RING3_TIMEOUT] = 0x38,
303 [DMA_RING4_TIMEOUT] = 0x3c,
304 [DMA_RING5_TIMEOUT] = 0x40,
305 [DMA_RING6_TIMEOUT] = 0x44,
306 [DMA_RING7_TIMEOUT] = 0x48,
307 [DMA_RING8_TIMEOUT] = 0x4c,
308 [DMA_RING9_TIMEOUT] = 0x50,
309 [DMA_RING10_TIMEOUT] = 0x54,
310 [DMA_RING11_TIMEOUT] = 0x58,
311 [DMA_RING12_TIMEOUT] = 0x5c,
312 [DMA_RING13_TIMEOUT] = 0x60,
313 [DMA_RING14_TIMEOUT] = 0x64,
314 [DMA_RING15_TIMEOUT] = 0x68,
315 [DMA_RING16_TIMEOUT] = 0x6C,
318 /* Set at runtime once bcmgenet version is known */
319 static const u8 *bcmgenet_dma_regs;
321 static inline struct bcmgenet_priv *dev_to_priv(struct device *dev)
323 return netdev_priv(dev_get_drvdata(dev));
326 static inline u32 bcmgenet_tdma_readl(struct bcmgenet_priv *priv,
329 return __raw_readl(priv->base + GENET_TDMA_REG_OFF +
330 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
333 static inline void bcmgenet_tdma_writel(struct bcmgenet_priv *priv,
334 u32 val, enum dma_reg r)
336 __raw_writel(val, priv->base + GENET_TDMA_REG_OFF +
337 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
340 static inline u32 bcmgenet_rdma_readl(struct bcmgenet_priv *priv,
343 return __raw_readl(priv->base + GENET_RDMA_REG_OFF +
344 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
347 static inline void bcmgenet_rdma_writel(struct bcmgenet_priv *priv,
348 u32 val, enum dma_reg r)
350 __raw_writel(val, priv->base + GENET_RDMA_REG_OFF +
351 DMA_RINGS_SIZE + bcmgenet_dma_regs[r]);
354 /* RDMA/TDMA ring registers and accessors
355 * we merge the common fields and just prefix with T/D the registers
356 * having different meaning depending on the direction
360 RDMA_WRITE_PTR = TDMA_READ_PTR,
362 RDMA_WRITE_PTR_HI = TDMA_READ_PTR_HI,
364 RDMA_PROD_INDEX = TDMA_CONS_INDEX,
366 RDMA_CONS_INDEX = TDMA_PROD_INDEX,
372 DMA_MBUF_DONE_THRESH,
374 RDMA_XON_XOFF_THRESH = TDMA_FLOW_PERIOD,
376 RDMA_READ_PTR = TDMA_WRITE_PTR,
378 RDMA_READ_PTR_HI = TDMA_WRITE_PTR_HI
381 /* GENET v4 supports 40-bits pointer addressing
382 * for obvious reasons the LO and HI word parts
383 * are contiguous, but this offsets the other
386 static const u8 genet_dma_ring_regs_v4[] = {
387 [TDMA_READ_PTR] = 0x00,
388 [TDMA_READ_PTR_HI] = 0x04,
389 [TDMA_CONS_INDEX] = 0x08,
390 [TDMA_PROD_INDEX] = 0x0C,
391 [DMA_RING_BUF_SIZE] = 0x10,
392 [DMA_START_ADDR] = 0x14,
393 [DMA_START_ADDR_HI] = 0x18,
394 [DMA_END_ADDR] = 0x1C,
395 [DMA_END_ADDR_HI] = 0x20,
396 [DMA_MBUF_DONE_THRESH] = 0x24,
397 [TDMA_FLOW_PERIOD] = 0x28,
398 [TDMA_WRITE_PTR] = 0x2C,
399 [TDMA_WRITE_PTR_HI] = 0x30,
402 static const u8 genet_dma_ring_regs_v123[] = {
403 [TDMA_READ_PTR] = 0x00,
404 [TDMA_CONS_INDEX] = 0x04,
405 [TDMA_PROD_INDEX] = 0x08,
406 [DMA_RING_BUF_SIZE] = 0x0C,
407 [DMA_START_ADDR] = 0x10,
408 [DMA_END_ADDR] = 0x14,
409 [DMA_MBUF_DONE_THRESH] = 0x18,
410 [TDMA_FLOW_PERIOD] = 0x1C,
411 [TDMA_WRITE_PTR] = 0x20,
414 /* Set at runtime once GENET version is known */
415 static const u8 *genet_dma_ring_regs;
417 static inline u32 bcmgenet_tdma_ring_readl(struct bcmgenet_priv *priv,
421 return __raw_readl(priv->base + GENET_TDMA_REG_OFF +
422 (DMA_RING_SIZE * ring) +
423 genet_dma_ring_regs[r]);
426 static inline void bcmgenet_tdma_ring_writel(struct bcmgenet_priv *priv,
427 unsigned int ring, u32 val,
430 __raw_writel(val, priv->base + GENET_TDMA_REG_OFF +
431 (DMA_RING_SIZE * ring) +
432 genet_dma_ring_regs[r]);
435 static inline u32 bcmgenet_rdma_ring_readl(struct bcmgenet_priv *priv,
439 return __raw_readl(priv->base + GENET_RDMA_REG_OFF +
440 (DMA_RING_SIZE * ring) +
441 genet_dma_ring_regs[r]);
444 static inline void bcmgenet_rdma_ring_writel(struct bcmgenet_priv *priv,
445 unsigned int ring, u32 val,
448 __raw_writel(val, priv->base + GENET_RDMA_REG_OFF +
449 (DMA_RING_SIZE * ring) +
450 genet_dma_ring_regs[r]);
453 static int bcmgenet_get_settings(struct net_device *dev,
454 struct ethtool_cmd *cmd)
456 struct bcmgenet_priv *priv = netdev_priv(dev);
458 if (!netif_running(dev))
464 return phy_ethtool_gset(priv->phydev, cmd);
467 static int bcmgenet_set_settings(struct net_device *dev,
468 struct ethtool_cmd *cmd)
470 struct bcmgenet_priv *priv = netdev_priv(dev);
472 if (!netif_running(dev))
478 return phy_ethtool_sset(priv->phydev, cmd);
481 static int bcmgenet_set_rx_csum(struct net_device *dev,
482 netdev_features_t wanted)
484 struct bcmgenet_priv *priv = netdev_priv(dev);
488 rx_csum_en = !!(wanted & NETIF_F_RXCSUM);
490 rbuf_chk_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CHK_CTRL);
492 /* enable rx checksumming */
494 rbuf_chk_ctrl |= RBUF_RXCHK_EN;
496 rbuf_chk_ctrl &= ~RBUF_RXCHK_EN;
497 priv->desc_rxchk_en = rx_csum_en;
499 /* If UniMAC forwards CRC, we need to skip over it to get
500 * a valid CHK bit to be set in the per-packet status word
502 if (rx_csum_en && priv->crc_fwd_en)
503 rbuf_chk_ctrl |= RBUF_SKIP_FCS;
505 rbuf_chk_ctrl &= ~RBUF_SKIP_FCS;
507 bcmgenet_rbuf_writel(priv, rbuf_chk_ctrl, RBUF_CHK_CTRL);
512 static int bcmgenet_set_tx_csum(struct net_device *dev,
513 netdev_features_t wanted)
515 struct bcmgenet_priv *priv = netdev_priv(dev);
517 u32 tbuf_ctrl, rbuf_ctrl;
519 tbuf_ctrl = bcmgenet_tbuf_ctrl_get(priv);
520 rbuf_ctrl = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
522 desc_64b_en = !!(wanted & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM));
524 /* enable 64 bytes descriptor in both directions (RBUF and TBUF) */
526 tbuf_ctrl |= RBUF_64B_EN;
527 rbuf_ctrl |= RBUF_64B_EN;
529 tbuf_ctrl &= ~RBUF_64B_EN;
530 rbuf_ctrl &= ~RBUF_64B_EN;
532 priv->desc_64b_en = desc_64b_en;
534 bcmgenet_tbuf_ctrl_set(priv, tbuf_ctrl);
535 bcmgenet_rbuf_writel(priv, rbuf_ctrl, RBUF_CTRL);
540 static int bcmgenet_set_features(struct net_device *dev,
541 netdev_features_t features)
543 netdev_features_t changed = features ^ dev->features;
544 netdev_features_t wanted = dev->wanted_features;
547 if (changed & (NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM))
548 ret = bcmgenet_set_tx_csum(dev, wanted);
549 if (changed & (NETIF_F_RXCSUM))
550 ret = bcmgenet_set_rx_csum(dev, wanted);
555 static u32 bcmgenet_get_msglevel(struct net_device *dev)
557 struct bcmgenet_priv *priv = netdev_priv(dev);
559 return priv->msg_enable;
562 static void bcmgenet_set_msglevel(struct net_device *dev, u32 level)
564 struct bcmgenet_priv *priv = netdev_priv(dev);
566 priv->msg_enable = level;
569 static int bcmgenet_get_coalesce(struct net_device *dev,
570 struct ethtool_coalesce *ec)
572 struct bcmgenet_priv *priv = netdev_priv(dev);
574 ec->tx_max_coalesced_frames =
575 bcmgenet_tdma_ring_readl(priv, DESC_INDEX,
576 DMA_MBUF_DONE_THRESH);
577 ec->rx_max_coalesced_frames =
578 bcmgenet_rdma_ring_readl(priv, DESC_INDEX,
579 DMA_MBUF_DONE_THRESH);
580 ec->rx_coalesce_usecs =
581 bcmgenet_rdma_readl(priv, DMA_RING16_TIMEOUT) * 8192 / 1000;
586 static int bcmgenet_set_coalesce(struct net_device *dev,
587 struct ethtool_coalesce *ec)
589 struct bcmgenet_priv *priv = netdev_priv(dev);
593 /* Base system clock is 125Mhz, DMA timeout is this reference clock
594 * divided by 1024, which yields roughly 8.192us, our maximum value
595 * has to fit in the DMA_TIMEOUT_MASK (16 bits)
597 if (ec->tx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
598 ec->tx_max_coalesced_frames == 0 ||
599 ec->rx_max_coalesced_frames > DMA_INTR_THRESHOLD_MASK ||
600 ec->rx_coalesce_usecs > (DMA_TIMEOUT_MASK * 8) + 1)
603 if (ec->rx_coalesce_usecs == 0 && ec->rx_max_coalesced_frames == 0)
606 /* GENET TDMA hardware does not support a configurable timeout, but will
607 * always generate an interrupt either after MBDONE packets have been
608 * transmitted, or when the ring is emtpy.
610 if (ec->tx_coalesce_usecs || ec->tx_coalesce_usecs_high ||
611 ec->tx_coalesce_usecs_irq || ec->tx_coalesce_usecs_low)
614 /* Program all TX queues with the same values, as there is no
615 * ethtool knob to do coalescing on a per-queue basis
617 for (i = 0; i < priv->hw_params->tx_queues; i++)
618 bcmgenet_tdma_ring_writel(priv, i,
619 ec->tx_max_coalesced_frames,
620 DMA_MBUF_DONE_THRESH);
621 bcmgenet_tdma_ring_writel(priv, DESC_INDEX,
622 ec->tx_max_coalesced_frames,
623 DMA_MBUF_DONE_THRESH);
625 for (i = 0; i < priv->hw_params->rx_queues; i++) {
626 bcmgenet_rdma_ring_writel(priv, i,
627 ec->rx_max_coalesced_frames,
628 DMA_MBUF_DONE_THRESH);
630 reg = bcmgenet_rdma_readl(priv, DMA_RING0_TIMEOUT + i);
631 reg &= ~DMA_TIMEOUT_MASK;
632 reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192);
633 bcmgenet_rdma_writel(priv, reg, DMA_RING0_TIMEOUT + i);
636 bcmgenet_rdma_ring_writel(priv, DESC_INDEX,
637 ec->rx_max_coalesced_frames,
638 DMA_MBUF_DONE_THRESH);
640 reg = bcmgenet_rdma_readl(priv, DMA_RING16_TIMEOUT);
641 reg &= ~DMA_TIMEOUT_MASK;
642 reg |= DIV_ROUND_UP(ec->rx_coalesce_usecs * 1000, 8192);
643 bcmgenet_rdma_writel(priv, reg, DMA_RING16_TIMEOUT);
648 /* standard ethtool support functions. */
649 enum bcmgenet_stat_type {
650 BCMGENET_STAT_NETDEV = -1,
651 BCMGENET_STAT_MIB_RX,
652 BCMGENET_STAT_MIB_TX,
658 struct bcmgenet_stats {
659 char stat_string[ETH_GSTRING_LEN];
662 enum bcmgenet_stat_type type;
663 /* reg offset from UMAC base for misc counters */
667 #define STAT_NETDEV(m) { \
668 .stat_string = __stringify(m), \
669 .stat_sizeof = sizeof(((struct net_device_stats *)0)->m), \
670 .stat_offset = offsetof(struct net_device_stats, m), \
671 .type = BCMGENET_STAT_NETDEV, \
674 #define STAT_GENET_MIB(str, m, _type) { \
675 .stat_string = str, \
676 .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
677 .stat_offset = offsetof(struct bcmgenet_priv, m), \
681 #define STAT_GENET_MIB_RX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_RX)
682 #define STAT_GENET_MIB_TX(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_MIB_TX)
683 #define STAT_GENET_RUNT(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_RUNT)
684 #define STAT_GENET_SOFT_MIB(str, m) STAT_GENET_MIB(str, m, BCMGENET_STAT_SOFT)
686 #define STAT_GENET_MISC(str, m, offset) { \
687 .stat_string = str, \
688 .stat_sizeof = sizeof(((struct bcmgenet_priv *)0)->m), \
689 .stat_offset = offsetof(struct bcmgenet_priv, m), \
690 .type = BCMGENET_STAT_MISC, \
691 .reg_offset = offset, \
695 /* There is a 0xC gap between the end of RX and beginning of TX stats and then
696 * between the end of TX stats and the beginning of the RX RUNT
698 #define BCMGENET_STAT_OFFSET 0xc
700 /* Hardware counters must be kept in sync because the order/offset
701 * is important here (order in structure declaration = order in hardware)
703 static const struct bcmgenet_stats bcmgenet_gstrings_stats[] = {
705 STAT_NETDEV(rx_packets),
706 STAT_NETDEV(tx_packets),
707 STAT_NETDEV(rx_bytes),
708 STAT_NETDEV(tx_bytes),
709 STAT_NETDEV(rx_errors),
710 STAT_NETDEV(tx_errors),
711 STAT_NETDEV(rx_dropped),
712 STAT_NETDEV(tx_dropped),
713 STAT_NETDEV(multicast),
714 /* UniMAC RSV counters */
715 STAT_GENET_MIB_RX("rx_64_octets", mib.rx.pkt_cnt.cnt_64),
716 STAT_GENET_MIB_RX("rx_65_127_oct", mib.rx.pkt_cnt.cnt_127),
717 STAT_GENET_MIB_RX("rx_128_255_oct", mib.rx.pkt_cnt.cnt_255),
718 STAT_GENET_MIB_RX("rx_256_511_oct", mib.rx.pkt_cnt.cnt_511),
719 STAT_GENET_MIB_RX("rx_512_1023_oct", mib.rx.pkt_cnt.cnt_1023),
720 STAT_GENET_MIB_RX("rx_1024_1518_oct", mib.rx.pkt_cnt.cnt_1518),
721 STAT_GENET_MIB_RX("rx_vlan_1519_1522_oct", mib.rx.pkt_cnt.cnt_mgv),
722 STAT_GENET_MIB_RX("rx_1522_2047_oct", mib.rx.pkt_cnt.cnt_2047),
723 STAT_GENET_MIB_RX("rx_2048_4095_oct", mib.rx.pkt_cnt.cnt_4095),
724 STAT_GENET_MIB_RX("rx_4096_9216_oct", mib.rx.pkt_cnt.cnt_9216),
725 STAT_GENET_MIB_RX("rx_pkts", mib.rx.pkt),
726 STAT_GENET_MIB_RX("rx_bytes", mib.rx.bytes),
727 STAT_GENET_MIB_RX("rx_multicast", mib.rx.mca),
728 STAT_GENET_MIB_RX("rx_broadcast", mib.rx.bca),
729 STAT_GENET_MIB_RX("rx_fcs", mib.rx.fcs),
730 STAT_GENET_MIB_RX("rx_control", mib.rx.cf),
731 STAT_GENET_MIB_RX("rx_pause", mib.rx.pf),
732 STAT_GENET_MIB_RX("rx_unknown", mib.rx.uo),
733 STAT_GENET_MIB_RX("rx_align", mib.rx.aln),
734 STAT_GENET_MIB_RX("rx_outrange", mib.rx.flr),
735 STAT_GENET_MIB_RX("rx_code", mib.rx.cde),
736 STAT_GENET_MIB_RX("rx_carrier", mib.rx.fcr),
737 STAT_GENET_MIB_RX("rx_oversize", mib.rx.ovr),
738 STAT_GENET_MIB_RX("rx_jabber", mib.rx.jbr),
739 STAT_GENET_MIB_RX("rx_mtu_err", mib.rx.mtue),
740 STAT_GENET_MIB_RX("rx_good_pkts", mib.rx.pok),
741 STAT_GENET_MIB_RX("rx_unicast", mib.rx.uc),
742 STAT_GENET_MIB_RX("rx_ppp", mib.rx.ppp),
743 STAT_GENET_MIB_RX("rx_crc", mib.rx.rcrc),
744 /* UniMAC TSV counters */
745 STAT_GENET_MIB_TX("tx_64_octets", mib.tx.pkt_cnt.cnt_64),
746 STAT_GENET_MIB_TX("tx_65_127_oct", mib.tx.pkt_cnt.cnt_127),
747 STAT_GENET_MIB_TX("tx_128_255_oct", mib.tx.pkt_cnt.cnt_255),
748 STAT_GENET_MIB_TX("tx_256_511_oct", mib.tx.pkt_cnt.cnt_511),
749 STAT_GENET_MIB_TX("tx_512_1023_oct", mib.tx.pkt_cnt.cnt_1023),
750 STAT_GENET_MIB_TX("tx_1024_1518_oct", mib.tx.pkt_cnt.cnt_1518),
751 STAT_GENET_MIB_TX("tx_vlan_1519_1522_oct", mib.tx.pkt_cnt.cnt_mgv),
752 STAT_GENET_MIB_TX("tx_1522_2047_oct", mib.tx.pkt_cnt.cnt_2047),
753 STAT_GENET_MIB_TX("tx_2048_4095_oct", mib.tx.pkt_cnt.cnt_4095),
754 STAT_GENET_MIB_TX("tx_4096_9216_oct", mib.tx.pkt_cnt.cnt_9216),
755 STAT_GENET_MIB_TX("tx_pkts", mib.tx.pkts),
756 STAT_GENET_MIB_TX("tx_multicast", mib.tx.mca),
757 STAT_GENET_MIB_TX("tx_broadcast", mib.tx.bca),
758 STAT_GENET_MIB_TX("tx_pause", mib.tx.pf),
759 STAT_GENET_MIB_TX("tx_control", mib.tx.cf),
760 STAT_GENET_MIB_TX("tx_fcs_err", mib.tx.fcs),
761 STAT_GENET_MIB_TX("tx_oversize", mib.tx.ovr),
762 STAT_GENET_MIB_TX("tx_defer", mib.tx.drf),
763 STAT_GENET_MIB_TX("tx_excess_defer", mib.tx.edf),
764 STAT_GENET_MIB_TX("tx_single_col", mib.tx.scl),
765 STAT_GENET_MIB_TX("tx_multi_col", mib.tx.mcl),
766 STAT_GENET_MIB_TX("tx_late_col", mib.tx.lcl),
767 STAT_GENET_MIB_TX("tx_excess_col", mib.tx.ecl),
768 STAT_GENET_MIB_TX("tx_frags", mib.tx.frg),
769 STAT_GENET_MIB_TX("tx_total_col", mib.tx.ncl),
770 STAT_GENET_MIB_TX("tx_jabber", mib.tx.jbr),
771 STAT_GENET_MIB_TX("tx_bytes", mib.tx.bytes),
772 STAT_GENET_MIB_TX("tx_good_pkts", mib.tx.pok),
773 STAT_GENET_MIB_TX("tx_unicast", mib.tx.uc),
774 /* UniMAC RUNT counters */
775 STAT_GENET_RUNT("rx_runt_pkts", mib.rx_runt_cnt),
776 STAT_GENET_RUNT("rx_runt_valid_fcs", mib.rx_runt_fcs),
777 STAT_GENET_RUNT("rx_runt_inval_fcs_align", mib.rx_runt_fcs_align),
778 STAT_GENET_RUNT("rx_runt_bytes", mib.rx_runt_bytes),
779 /* Misc UniMAC counters */
780 STAT_GENET_MISC("rbuf_ovflow_cnt", mib.rbuf_ovflow_cnt,
782 STAT_GENET_MISC("rbuf_err_cnt", mib.rbuf_err_cnt, UMAC_RBUF_ERR_CNT),
783 STAT_GENET_MISC("mdf_err_cnt", mib.mdf_err_cnt, UMAC_MDF_ERR_CNT),
784 STAT_GENET_SOFT_MIB("alloc_rx_buff_failed", mib.alloc_rx_buff_failed),
785 STAT_GENET_SOFT_MIB("rx_dma_failed", mib.rx_dma_failed),
786 STAT_GENET_SOFT_MIB("tx_dma_failed", mib.tx_dma_failed),
789 #define BCMGENET_STATS_LEN ARRAY_SIZE(bcmgenet_gstrings_stats)
791 static void bcmgenet_get_drvinfo(struct net_device *dev,
792 struct ethtool_drvinfo *info)
794 strlcpy(info->driver, "bcmgenet", sizeof(info->driver));
795 strlcpy(info->version, "v2.0", sizeof(info->version));
798 static int bcmgenet_get_sset_count(struct net_device *dev, int string_set)
800 switch (string_set) {
802 return BCMGENET_STATS_LEN;
808 static void bcmgenet_get_strings(struct net_device *dev, u32 stringset,
815 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
816 memcpy(data + i * ETH_GSTRING_LEN,
817 bcmgenet_gstrings_stats[i].stat_string,
824 static void bcmgenet_update_mib_counters(struct bcmgenet_priv *priv)
828 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
829 const struct bcmgenet_stats *s;
834 s = &bcmgenet_gstrings_stats[i];
836 case BCMGENET_STAT_NETDEV:
837 case BCMGENET_STAT_SOFT:
839 case BCMGENET_STAT_MIB_RX:
840 case BCMGENET_STAT_MIB_TX:
841 case BCMGENET_STAT_RUNT:
842 if (s->type != BCMGENET_STAT_MIB_RX)
843 offset = BCMGENET_STAT_OFFSET;
844 val = bcmgenet_umac_readl(priv,
845 UMAC_MIB_START + j + offset);
847 case BCMGENET_STAT_MISC:
848 val = bcmgenet_umac_readl(priv, s->reg_offset);
849 /* clear if overflowed */
851 bcmgenet_umac_writel(priv, 0, s->reg_offset);
856 p = (char *)priv + s->stat_offset;
861 static void bcmgenet_get_ethtool_stats(struct net_device *dev,
862 struct ethtool_stats *stats,
865 struct bcmgenet_priv *priv = netdev_priv(dev);
868 if (netif_running(dev))
869 bcmgenet_update_mib_counters(priv);
871 for (i = 0; i < BCMGENET_STATS_LEN; i++) {
872 const struct bcmgenet_stats *s;
875 s = &bcmgenet_gstrings_stats[i];
876 if (s->type == BCMGENET_STAT_NETDEV)
877 p = (char *)&dev->stats;
885 static void bcmgenet_eee_enable_set(struct net_device *dev, bool enable)
887 struct bcmgenet_priv *priv = netdev_priv(dev);
888 u32 off = priv->hw_params->tbuf_offset + TBUF_ENERGY_CTRL;
891 if (enable && !priv->clk_eee_enabled) {
892 clk_prepare_enable(priv->clk_eee);
893 priv->clk_eee_enabled = true;
896 reg = bcmgenet_umac_readl(priv, UMAC_EEE_CTRL);
901 bcmgenet_umac_writel(priv, reg, UMAC_EEE_CTRL);
903 /* Enable EEE and switch to a 27Mhz clock automatically */
904 reg = __raw_readl(priv->base + off);
906 reg |= TBUF_EEE_EN | TBUF_PM_EN;
908 reg &= ~(TBUF_EEE_EN | TBUF_PM_EN);
909 __raw_writel(reg, priv->base + off);
911 /* Do the same for thing for RBUF */
912 reg = bcmgenet_rbuf_readl(priv, RBUF_ENERGY_CTRL);
914 reg |= RBUF_EEE_EN | RBUF_PM_EN;
916 reg &= ~(RBUF_EEE_EN | RBUF_PM_EN);
917 bcmgenet_rbuf_writel(priv, reg, RBUF_ENERGY_CTRL);
919 if (!enable && priv->clk_eee_enabled) {
920 clk_disable_unprepare(priv->clk_eee);
921 priv->clk_eee_enabled = false;
924 priv->eee.eee_enabled = enable;
925 priv->eee.eee_active = enable;
928 static int bcmgenet_get_eee(struct net_device *dev, struct ethtool_eee *e)
930 struct bcmgenet_priv *priv = netdev_priv(dev);
931 struct ethtool_eee *p = &priv->eee;
933 if (GENET_IS_V1(priv))
936 e->eee_enabled = p->eee_enabled;
937 e->eee_active = p->eee_active;
938 e->tx_lpi_timer = bcmgenet_umac_readl(priv, UMAC_EEE_LPI_TIMER);
940 return phy_ethtool_get_eee(priv->phydev, e);
943 static int bcmgenet_set_eee(struct net_device *dev, struct ethtool_eee *e)
945 struct bcmgenet_priv *priv = netdev_priv(dev);
946 struct ethtool_eee *p = &priv->eee;
949 if (GENET_IS_V1(priv))
952 p->eee_enabled = e->eee_enabled;
954 if (!p->eee_enabled) {
955 bcmgenet_eee_enable_set(dev, false);
957 ret = phy_init_eee(priv->phydev, 0);
959 netif_err(priv, hw, dev, "EEE initialization failed\n");
963 bcmgenet_umac_writel(priv, e->tx_lpi_timer, UMAC_EEE_LPI_TIMER);
964 bcmgenet_eee_enable_set(dev, true);
967 return phy_ethtool_set_eee(priv->phydev, e);
970 static int bcmgenet_nway_reset(struct net_device *dev)
972 struct bcmgenet_priv *priv = netdev_priv(dev);
974 return genphy_restart_aneg(priv->phydev);
977 /* standard ethtool support functions. */
978 static struct ethtool_ops bcmgenet_ethtool_ops = {
979 .get_strings = bcmgenet_get_strings,
980 .get_sset_count = bcmgenet_get_sset_count,
981 .get_ethtool_stats = bcmgenet_get_ethtool_stats,
982 .get_settings = bcmgenet_get_settings,
983 .set_settings = bcmgenet_set_settings,
984 .get_drvinfo = bcmgenet_get_drvinfo,
985 .get_link = ethtool_op_get_link,
986 .get_msglevel = bcmgenet_get_msglevel,
987 .set_msglevel = bcmgenet_set_msglevel,
988 .get_wol = bcmgenet_get_wol,
989 .set_wol = bcmgenet_set_wol,
990 .get_eee = bcmgenet_get_eee,
991 .set_eee = bcmgenet_set_eee,
992 .nway_reset = bcmgenet_nway_reset,
993 .get_coalesce = bcmgenet_get_coalesce,
994 .set_coalesce = bcmgenet_set_coalesce,
997 /* Power down the unimac, based on mode. */
998 static int bcmgenet_power_down(struct bcmgenet_priv *priv,
999 enum bcmgenet_power_mode mode)
1005 case GENET_POWER_CABLE_SENSE:
1006 phy_detach(priv->phydev);
1009 case GENET_POWER_WOL_MAGIC:
1010 ret = bcmgenet_wol_power_down_cfg(priv, mode);
1013 case GENET_POWER_PASSIVE:
1014 /* Power down LED */
1015 if (priv->hw_params->flags & GENET_HAS_EXT) {
1016 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
1017 reg |= (EXT_PWR_DOWN_PHY |
1018 EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_BIAS);
1019 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
1021 bcmgenet_phy_power_set(priv->dev, false);
1031 static void bcmgenet_power_up(struct bcmgenet_priv *priv,
1032 enum bcmgenet_power_mode mode)
1036 if (!(priv->hw_params->flags & GENET_HAS_EXT))
1039 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
1042 case GENET_POWER_PASSIVE:
1043 reg &= ~(EXT_PWR_DOWN_DLL | EXT_PWR_DOWN_PHY |
1046 case GENET_POWER_CABLE_SENSE:
1048 reg |= EXT_PWR_DN_EN_LD;
1050 case GENET_POWER_WOL_MAGIC:
1051 bcmgenet_wol_power_up_cfg(priv, mode);
1057 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
1058 if (mode == GENET_POWER_PASSIVE) {
1059 bcmgenet_phy_power_set(priv->dev, true);
1060 bcmgenet_mii_reset(priv->dev);
1064 /* ioctl handle special commands that are not present in ethtool. */
1065 static int bcmgenet_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
1067 struct bcmgenet_priv *priv = netdev_priv(dev);
1070 if (!netif_running(dev))
1080 val = phy_mii_ioctl(priv->phydev, rq, cmd);
1091 static struct enet_cb *bcmgenet_get_txcb(struct bcmgenet_priv *priv,
1092 struct bcmgenet_tx_ring *ring)
1094 struct enet_cb *tx_cb_ptr;
1096 tx_cb_ptr = ring->cbs;
1097 tx_cb_ptr += ring->write_ptr - ring->cb_ptr;
1099 /* Advancing local write pointer */
1100 if (ring->write_ptr == ring->end_ptr)
1101 ring->write_ptr = ring->cb_ptr;
1108 /* Simple helper to free a control block's resources */
1109 static void bcmgenet_free_cb(struct enet_cb *cb)
1111 dev_kfree_skb_any(cb->skb);
1113 dma_unmap_addr_set(cb, dma_addr, 0);
1116 static inline void bcmgenet_rx_ring16_int_disable(struct bcmgenet_rx_ring *ring)
1118 bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_RXDMA_DONE,
1119 INTRL2_CPU_MASK_SET);
1122 static inline void bcmgenet_rx_ring16_int_enable(struct bcmgenet_rx_ring *ring)
1124 bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_RXDMA_DONE,
1125 INTRL2_CPU_MASK_CLEAR);
1128 static inline void bcmgenet_rx_ring_int_disable(struct bcmgenet_rx_ring *ring)
1130 bcmgenet_intrl2_1_writel(ring->priv,
1131 1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index),
1132 INTRL2_CPU_MASK_SET);
1135 static inline void bcmgenet_rx_ring_int_enable(struct bcmgenet_rx_ring *ring)
1137 bcmgenet_intrl2_1_writel(ring->priv,
1138 1 << (UMAC_IRQ1_RX_INTR_SHIFT + ring->index),
1139 INTRL2_CPU_MASK_CLEAR);
1142 static inline void bcmgenet_tx_ring16_int_disable(struct bcmgenet_tx_ring *ring)
1144 bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_TXDMA_DONE,
1145 INTRL2_CPU_MASK_SET);
1148 static inline void bcmgenet_tx_ring16_int_enable(struct bcmgenet_tx_ring *ring)
1150 bcmgenet_intrl2_0_writel(ring->priv, UMAC_IRQ_TXDMA_DONE,
1151 INTRL2_CPU_MASK_CLEAR);
1154 static inline void bcmgenet_tx_ring_int_enable(struct bcmgenet_tx_ring *ring)
1156 bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
1157 INTRL2_CPU_MASK_CLEAR);
1160 static inline void bcmgenet_tx_ring_int_disable(struct bcmgenet_tx_ring *ring)
1162 bcmgenet_intrl2_1_writel(ring->priv, 1 << ring->index,
1163 INTRL2_CPU_MASK_SET);
1166 /* Unlocked version of the reclaim routine */
1167 static unsigned int __bcmgenet_tx_reclaim(struct net_device *dev,
1168 struct bcmgenet_tx_ring *ring)
1170 struct bcmgenet_priv *priv = netdev_priv(dev);
1171 struct device *kdev = &priv->pdev->dev;
1172 struct enet_cb *tx_cb_ptr;
1173 struct netdev_queue *txq;
1174 unsigned int pkts_compl = 0;
1175 unsigned int c_index;
1176 unsigned int txbds_ready;
1177 unsigned int txbds_processed = 0;
1179 /* Compute how many buffers are transmitted since last xmit call */
1180 c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
1181 c_index &= DMA_C_INDEX_MASK;
1183 if (likely(c_index >= ring->c_index))
1184 txbds_ready = c_index - ring->c_index;
1186 txbds_ready = (DMA_C_INDEX_MASK + 1) - ring->c_index + c_index;
1188 netif_dbg(priv, tx_done, dev,
1189 "%s ring=%d old_c_index=%u c_index=%u txbds_ready=%u\n",
1190 __func__, ring->index, ring->c_index, c_index, txbds_ready);
1192 /* Reclaim transmitted buffers */
1193 while (txbds_processed < txbds_ready) {
1194 tx_cb_ptr = &priv->tx_cbs[ring->clean_ptr];
1195 if (tx_cb_ptr->skb) {
1197 dev->stats.tx_packets++;
1198 dev->stats.tx_bytes += tx_cb_ptr->skb->len;
1199 dma_unmap_single(kdev,
1200 dma_unmap_addr(tx_cb_ptr, dma_addr),
1201 dma_unmap_len(tx_cb_ptr, dma_len),
1203 bcmgenet_free_cb(tx_cb_ptr);
1204 } else if (dma_unmap_addr(tx_cb_ptr, dma_addr)) {
1205 dev->stats.tx_bytes +=
1206 dma_unmap_len(tx_cb_ptr, dma_len);
1207 dma_unmap_page(kdev,
1208 dma_unmap_addr(tx_cb_ptr, dma_addr),
1209 dma_unmap_len(tx_cb_ptr, dma_len),
1211 dma_unmap_addr_set(tx_cb_ptr, dma_addr, 0);
1215 if (likely(ring->clean_ptr < ring->end_ptr))
1218 ring->clean_ptr = ring->cb_ptr;
1221 ring->free_bds += txbds_processed;
1222 ring->c_index = (ring->c_index + txbds_processed) & DMA_C_INDEX_MASK;
1224 if (ring->free_bds > (MAX_SKB_FRAGS + 1)) {
1225 txq = netdev_get_tx_queue(dev, ring->queue);
1226 if (netif_tx_queue_stopped(txq))
1227 netif_tx_wake_queue(txq);
1233 static unsigned int bcmgenet_tx_reclaim(struct net_device *dev,
1234 struct bcmgenet_tx_ring *ring)
1236 unsigned int released;
1237 unsigned long flags;
1239 spin_lock_irqsave(&ring->lock, flags);
1240 released = __bcmgenet_tx_reclaim(dev, ring);
1241 spin_unlock_irqrestore(&ring->lock, flags);
1246 static int bcmgenet_tx_poll(struct napi_struct *napi, int budget)
1248 struct bcmgenet_tx_ring *ring =
1249 container_of(napi, struct bcmgenet_tx_ring, napi);
1250 unsigned int work_done = 0;
1252 work_done = bcmgenet_tx_reclaim(ring->priv->dev, ring);
1254 if (work_done == 0) {
1255 napi_complete(napi);
1256 ring->int_enable(ring);
1264 static void bcmgenet_tx_reclaim_all(struct net_device *dev)
1266 struct bcmgenet_priv *priv = netdev_priv(dev);
1269 if (netif_is_multiqueue(dev)) {
1270 for (i = 0; i < priv->hw_params->tx_queues; i++)
1271 bcmgenet_tx_reclaim(dev, &priv->tx_rings[i]);
1274 bcmgenet_tx_reclaim(dev, &priv->tx_rings[DESC_INDEX]);
1277 /* Transmits a single SKB (either head of a fragment or a single SKB)
1278 * caller must hold priv->lock
1280 static int bcmgenet_xmit_single(struct net_device *dev,
1281 struct sk_buff *skb,
1283 struct bcmgenet_tx_ring *ring)
1285 struct bcmgenet_priv *priv = netdev_priv(dev);
1286 struct device *kdev = &priv->pdev->dev;
1287 struct enet_cb *tx_cb_ptr;
1288 unsigned int skb_len;
1293 tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
1295 if (unlikely(!tx_cb_ptr))
1298 tx_cb_ptr->skb = skb;
1300 skb_len = skb_headlen(skb) < ETH_ZLEN ? ETH_ZLEN : skb_headlen(skb);
1302 mapping = dma_map_single(kdev, skb->data, skb_len, DMA_TO_DEVICE);
1303 ret = dma_mapping_error(kdev, mapping);
1305 priv->mib.tx_dma_failed++;
1306 netif_err(priv, tx_err, dev, "Tx DMA map failed\n");
1311 dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
1312 dma_unmap_len_set(tx_cb_ptr, dma_len, skb_len);
1313 length_status = (skb_len << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |
1314 (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT) |
1317 if (skb->ip_summed == CHECKSUM_PARTIAL)
1318 length_status |= DMA_TX_DO_CSUM;
1320 dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping, length_status);
1325 /* Transmit a SKB fragment */
1326 static int bcmgenet_xmit_frag(struct net_device *dev,
1329 struct bcmgenet_tx_ring *ring)
1331 struct bcmgenet_priv *priv = netdev_priv(dev);
1332 struct device *kdev = &priv->pdev->dev;
1333 struct enet_cb *tx_cb_ptr;
1337 tx_cb_ptr = bcmgenet_get_txcb(priv, ring);
1339 if (unlikely(!tx_cb_ptr))
1341 tx_cb_ptr->skb = NULL;
1343 mapping = skb_frag_dma_map(kdev, frag, 0,
1344 skb_frag_size(frag), DMA_TO_DEVICE);
1345 ret = dma_mapping_error(kdev, mapping);
1347 priv->mib.tx_dma_failed++;
1348 netif_err(priv, tx_err, dev, "%s: Tx DMA map failed\n",
1353 dma_unmap_addr_set(tx_cb_ptr, dma_addr, mapping);
1354 dma_unmap_len_set(tx_cb_ptr, dma_len, frag->size);
1356 dmadesc_set(priv, tx_cb_ptr->bd_addr, mapping,
1357 (frag->size << DMA_BUFLENGTH_SHIFT) | dma_desc_flags |
1358 (priv->hw_params->qtag_mask << DMA_TX_QTAG_SHIFT));
1363 /* Reallocate the SKB to put enough headroom in front of it and insert
1364 * the transmit checksum offsets in the descriptors
1366 static struct sk_buff *bcmgenet_put_tx_csum(struct net_device *dev,
1367 struct sk_buff *skb)
1369 struct status_64 *status = NULL;
1370 struct sk_buff *new_skb;
1376 if (unlikely(skb_headroom(skb) < sizeof(*status))) {
1377 /* If 64 byte status block enabled, must make sure skb has
1378 * enough headroom for us to insert 64B status block.
1380 new_skb = skb_realloc_headroom(skb, sizeof(*status));
1383 dev->stats.tx_dropped++;
1389 skb_push(skb, sizeof(*status));
1390 status = (struct status_64 *)skb->data;
1392 if (skb->ip_summed == CHECKSUM_PARTIAL) {
1393 ip_ver = htons(skb->protocol);
1396 ip_proto = ip_hdr(skb)->protocol;
1399 ip_proto = ipv6_hdr(skb)->nexthdr;
1405 offset = skb_checksum_start_offset(skb) - sizeof(*status);
1406 tx_csum_info = (offset << STATUS_TX_CSUM_START_SHIFT) |
1407 (offset + skb->csum_offset);
1409 /* Set the length valid bit for TCP and UDP and just set
1410 * the special UDP flag for IPv4, else just set to 0.
1412 if (ip_proto == IPPROTO_TCP || ip_proto == IPPROTO_UDP) {
1413 tx_csum_info |= STATUS_TX_CSUM_LV;
1414 if (ip_proto == IPPROTO_UDP && ip_ver == ETH_P_IP)
1415 tx_csum_info |= STATUS_TX_CSUM_PROTO_UDP;
1420 status->tx_csum_info = tx_csum_info;
1426 static netdev_tx_t bcmgenet_xmit(struct sk_buff *skb, struct net_device *dev)
1428 struct bcmgenet_priv *priv = netdev_priv(dev);
1429 struct bcmgenet_tx_ring *ring = NULL;
1430 struct netdev_queue *txq;
1431 unsigned long flags = 0;
1432 int nr_frags, index;
1437 index = skb_get_queue_mapping(skb);
1438 /* Mapping strategy:
1439 * queue_mapping = 0, unclassified, packet xmited through ring16
1440 * queue_mapping = 1, goes to ring 0. (highest priority queue
1441 * queue_mapping = 2, goes to ring 1.
1442 * queue_mapping = 3, goes to ring 2.
1443 * queue_mapping = 4, goes to ring 3.
1450 nr_frags = skb_shinfo(skb)->nr_frags;
1451 ring = &priv->tx_rings[index];
1452 txq = netdev_get_tx_queue(dev, ring->queue);
1454 spin_lock_irqsave(&ring->lock, flags);
1455 if (ring->free_bds <= nr_frags + 1) {
1456 netif_tx_stop_queue(txq);
1457 netdev_err(dev, "%s: tx ring %d full when queue %d awake\n",
1458 __func__, index, ring->queue);
1459 ret = NETDEV_TX_BUSY;
1463 if (skb_padto(skb, ETH_ZLEN)) {
1468 /* set the SKB transmit checksum */
1469 if (priv->desc_64b_en) {
1470 skb = bcmgenet_put_tx_csum(dev, skb);
1477 dma_desc_flags = DMA_SOP;
1479 dma_desc_flags |= DMA_EOP;
1481 /* Transmit single SKB or head of fragment list */
1482 ret = bcmgenet_xmit_single(dev, skb, dma_desc_flags, ring);
1489 for (i = 0; i < nr_frags; i++) {
1490 ret = bcmgenet_xmit_frag(dev,
1491 &skb_shinfo(skb)->frags[i],
1492 (i == nr_frags - 1) ? DMA_EOP : 0,
1500 skb_tx_timestamp(skb);
1502 /* Decrement total BD count and advance our write pointer */
1503 ring->free_bds -= nr_frags + 1;
1504 ring->prod_index += nr_frags + 1;
1505 ring->prod_index &= DMA_P_INDEX_MASK;
1507 if (ring->free_bds <= (MAX_SKB_FRAGS + 1))
1508 netif_tx_stop_queue(txq);
1510 if (!skb->xmit_more || netif_xmit_stopped(txq))
1511 /* Packets are ready, update producer index */
1512 bcmgenet_tdma_ring_writel(priv, ring->index,
1513 ring->prod_index, TDMA_PROD_INDEX);
1515 spin_unlock_irqrestore(&ring->lock, flags);
1520 static struct sk_buff *bcmgenet_rx_refill(struct bcmgenet_priv *priv,
1523 struct device *kdev = &priv->pdev->dev;
1524 struct sk_buff *skb;
1525 struct sk_buff *rx_skb;
1528 /* Allocate a new Rx skb */
1529 skb = netdev_alloc_skb(priv->dev, priv->rx_buf_len + SKB_ALIGNMENT);
1531 priv->mib.alloc_rx_buff_failed++;
1532 netif_err(priv, rx_err, priv->dev,
1533 "%s: Rx skb allocation failed\n", __func__);
1537 /* DMA-map the new Rx skb */
1538 mapping = dma_map_single(kdev, skb->data, priv->rx_buf_len,
1540 if (dma_mapping_error(kdev, mapping)) {
1541 priv->mib.rx_dma_failed++;
1542 dev_kfree_skb_any(skb);
1543 netif_err(priv, rx_err, priv->dev,
1544 "%s: Rx skb DMA mapping failed\n", __func__);
1548 /* Grab the current Rx skb from the ring and DMA-unmap it */
1551 dma_unmap_single(kdev, dma_unmap_addr(cb, dma_addr),
1552 priv->rx_buf_len, DMA_FROM_DEVICE);
1554 /* Put the new Rx skb on the ring */
1556 dma_unmap_addr_set(cb, dma_addr, mapping);
1557 dmadesc_set_addr(priv, cb->bd_addr, mapping);
1559 /* Return the current Rx skb to caller */
1563 /* bcmgenet_desc_rx - descriptor based rx process.
1564 * this could be called from bottom half, or from NAPI polling method.
1566 static unsigned int bcmgenet_desc_rx(struct bcmgenet_rx_ring *ring,
1567 unsigned int budget)
1569 struct bcmgenet_priv *priv = ring->priv;
1570 struct net_device *dev = priv->dev;
1572 struct sk_buff *skb;
1573 u32 dma_length_status;
1574 unsigned long dma_flag;
1576 unsigned int rxpktprocessed = 0, rxpkttoprocess;
1577 unsigned int p_index;
1578 unsigned int discards;
1579 unsigned int chksum_ok = 0;
1581 p_index = bcmgenet_rdma_ring_readl(priv, ring->index, RDMA_PROD_INDEX);
1583 discards = (p_index >> DMA_P_INDEX_DISCARD_CNT_SHIFT) &
1584 DMA_P_INDEX_DISCARD_CNT_MASK;
1585 if (discards > ring->old_discards) {
1586 discards = discards - ring->old_discards;
1587 dev->stats.rx_missed_errors += discards;
1588 dev->stats.rx_errors += discards;
1589 ring->old_discards += discards;
1591 /* Clear HW register when we reach 75% of maximum 0xFFFF */
1592 if (ring->old_discards >= 0xC000) {
1593 ring->old_discards = 0;
1594 bcmgenet_rdma_ring_writel(priv, ring->index, 0,
1599 p_index &= DMA_P_INDEX_MASK;
1601 if (likely(p_index >= ring->c_index))
1602 rxpkttoprocess = p_index - ring->c_index;
1604 rxpkttoprocess = (DMA_C_INDEX_MASK + 1) - ring->c_index +
1607 netif_dbg(priv, rx_status, dev,
1608 "RDMA: rxpkttoprocess=%d\n", rxpkttoprocess);
1610 while ((rxpktprocessed < rxpkttoprocess) &&
1611 (rxpktprocessed < budget)) {
1612 cb = &priv->rx_cbs[ring->read_ptr];
1613 skb = bcmgenet_rx_refill(priv, cb);
1615 if (unlikely(!skb)) {
1616 dev->stats.rx_dropped++;
1620 if (!priv->desc_64b_en) {
1622 dmadesc_get_length_status(priv, cb->bd_addr);
1624 struct status_64 *status;
1626 status = (struct status_64 *)skb->data;
1627 dma_length_status = status->length_status;
1630 /* DMA flags and length are still valid no matter how
1631 * we got the Receive Status Vector (64B RSB or register)
1633 dma_flag = dma_length_status & 0xffff;
1634 len = dma_length_status >> DMA_BUFLENGTH_SHIFT;
1636 netif_dbg(priv, rx_status, dev,
1637 "%s:p_ind=%d c_ind=%d read_ptr=%d len_stat=0x%08x\n",
1638 __func__, p_index, ring->c_index,
1639 ring->read_ptr, dma_length_status);
1641 if (unlikely(!(dma_flag & DMA_EOP) || !(dma_flag & DMA_SOP))) {
1642 netif_err(priv, rx_status, dev,
1643 "dropping fragmented packet!\n");
1644 dev->stats.rx_errors++;
1645 dev_kfree_skb_any(skb);
1650 if (unlikely(dma_flag & (DMA_RX_CRC_ERROR |
1655 netif_err(priv, rx_status, dev, "dma_flag=0x%x\n",
1656 (unsigned int)dma_flag);
1657 if (dma_flag & DMA_RX_CRC_ERROR)
1658 dev->stats.rx_crc_errors++;
1659 if (dma_flag & DMA_RX_OV)
1660 dev->stats.rx_over_errors++;
1661 if (dma_flag & DMA_RX_NO)
1662 dev->stats.rx_frame_errors++;
1663 if (dma_flag & DMA_RX_LG)
1664 dev->stats.rx_length_errors++;
1665 dev->stats.rx_errors++;
1666 dev_kfree_skb_any(skb);
1668 } /* error packet */
1670 chksum_ok = (dma_flag & priv->dma_rx_chk_bit) &&
1671 priv->desc_rxchk_en;
1674 if (priv->desc_64b_en) {
1679 if (likely(chksum_ok))
1680 skb->ip_summed = CHECKSUM_UNNECESSARY;
1682 /* remove hardware 2bytes added for IP alignment */
1686 if (priv->crc_fwd_en) {
1687 skb_trim(skb, len - ETH_FCS_LEN);
1691 /*Finish setting up the received SKB and send it to the kernel*/
1692 skb->protocol = eth_type_trans(skb, priv->dev);
1693 dev->stats.rx_packets++;
1694 dev->stats.rx_bytes += len;
1695 if (dma_flag & DMA_RX_MULT)
1696 dev->stats.multicast++;
1699 napi_gro_receive(&ring->napi, skb);
1700 netif_dbg(priv, rx_status, dev, "pushed up to kernel\n");
1704 if (likely(ring->read_ptr < ring->end_ptr))
1707 ring->read_ptr = ring->cb_ptr;
1709 ring->c_index = (ring->c_index + 1) & DMA_C_INDEX_MASK;
1710 bcmgenet_rdma_ring_writel(priv, ring->index, ring->c_index, RDMA_CONS_INDEX);
1713 return rxpktprocessed;
1716 /* Rx NAPI polling method */
1717 static int bcmgenet_rx_poll(struct napi_struct *napi, int budget)
1719 struct bcmgenet_rx_ring *ring = container_of(napi,
1720 struct bcmgenet_rx_ring, napi);
1721 unsigned int work_done;
1723 work_done = bcmgenet_desc_rx(ring, budget);
1725 if (work_done < budget) {
1726 napi_complete(napi);
1727 ring->int_enable(ring);
1733 /* Assign skb to RX DMA descriptor. */
1734 static int bcmgenet_alloc_rx_buffers(struct bcmgenet_priv *priv,
1735 struct bcmgenet_rx_ring *ring)
1738 struct sk_buff *skb;
1741 netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
1743 /* loop here for each buffer needing assign */
1744 for (i = 0; i < ring->size; i++) {
1746 skb = bcmgenet_rx_refill(priv, cb);
1748 dev_kfree_skb_any(skb);
1756 static void bcmgenet_free_rx_buffers(struct bcmgenet_priv *priv)
1758 struct device *kdev = &priv->pdev->dev;
1762 for (i = 0; i < priv->num_rx_bds; i++) {
1763 cb = &priv->rx_cbs[i];
1765 if (dma_unmap_addr(cb, dma_addr)) {
1766 dma_unmap_single(kdev,
1767 dma_unmap_addr(cb, dma_addr),
1768 priv->rx_buf_len, DMA_FROM_DEVICE);
1769 dma_unmap_addr_set(cb, dma_addr, 0);
1773 bcmgenet_free_cb(cb);
1777 static void umac_enable_set(struct bcmgenet_priv *priv, u32 mask, bool enable)
1781 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
1786 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
1788 /* UniMAC stops on a packet boundary, wait for a full-size packet
1792 usleep_range(1000, 2000);
1795 static int reset_umac(struct bcmgenet_priv *priv)
1797 struct device *kdev = &priv->pdev->dev;
1798 unsigned int timeout = 0;
1801 /* 7358a0/7552a0: bad default in RBUF_FLUSH_CTRL.umac_sw_rst */
1802 bcmgenet_rbuf_ctrl_set(priv, 0);
1805 /* disable MAC while updating its registers */
1806 bcmgenet_umac_writel(priv, 0, UMAC_CMD);
1808 /* issue soft reset, wait for it to complete */
1809 bcmgenet_umac_writel(priv, CMD_SW_RESET, UMAC_CMD);
1810 while (timeout++ < 1000) {
1811 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
1812 if (!(reg & CMD_SW_RESET))
1818 if (timeout == 1000) {
1820 "timeout waiting for MAC to come out of reset\n");
1827 static void bcmgenet_intr_disable(struct bcmgenet_priv *priv)
1829 /* Mask all interrupts.*/
1830 bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
1831 bcmgenet_intrl2_0_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
1832 bcmgenet_intrl2_0_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1833 bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_MASK_SET);
1834 bcmgenet_intrl2_1_writel(priv, 0xFFFFFFFF, INTRL2_CPU_CLEAR);
1835 bcmgenet_intrl2_1_writel(priv, 0, INTRL2_CPU_MASK_CLEAR);
1838 static void bcmgenet_link_intr_enable(struct bcmgenet_priv *priv)
1840 u32 int0_enable = 0;
1842 /* Monitor cable plug/unplugged event for internal PHY, external PHY
1845 if (priv->internal_phy) {
1846 int0_enable |= UMAC_IRQ_LINK_EVENT;
1847 } else if (priv->ext_phy) {
1848 int0_enable |= UMAC_IRQ_LINK_EVENT;
1849 } else if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
1850 if (priv->hw_params->flags & GENET_HAS_MOCA_LINK_DET)
1851 int0_enable |= UMAC_IRQ_LINK_EVENT;
1853 bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
1856 static int init_umac(struct bcmgenet_priv *priv)
1858 struct device *kdev = &priv->pdev->dev;
1861 u32 int0_enable = 0;
1862 u32 int1_enable = 0;
1865 dev_dbg(&priv->pdev->dev, "bcmgenet: init_umac\n");
1867 ret = reset_umac(priv);
1871 bcmgenet_umac_writel(priv, 0, UMAC_CMD);
1872 /* clear tx/rx counter */
1873 bcmgenet_umac_writel(priv,
1874 MIB_RESET_RX | MIB_RESET_TX | MIB_RESET_RUNT,
1876 bcmgenet_umac_writel(priv, 0, UMAC_MIB_CTRL);
1878 bcmgenet_umac_writel(priv, ENET_MAX_MTU_SIZE, UMAC_MAX_FRAME_LEN);
1880 /* init rx registers, enable ip header optimization */
1881 reg = bcmgenet_rbuf_readl(priv, RBUF_CTRL);
1882 reg |= RBUF_ALIGN_2B;
1883 bcmgenet_rbuf_writel(priv, reg, RBUF_CTRL);
1885 if (!GENET_IS_V1(priv) && !GENET_IS_V2(priv))
1886 bcmgenet_rbuf_writel(priv, 1, RBUF_TBUF_SIZE_CTRL);
1888 bcmgenet_intr_disable(priv);
1890 /* Enable Rx default queue 16 interrupts */
1891 int0_enable |= UMAC_IRQ_RXDMA_DONE;
1893 /* Enable Tx default queue 16 interrupts */
1894 int0_enable |= UMAC_IRQ_TXDMA_DONE;
1896 /* Configure backpressure vectors for MoCA */
1897 if (priv->phy_interface == PHY_INTERFACE_MODE_MOCA) {
1898 reg = bcmgenet_bp_mc_get(priv);
1899 reg |= BIT(priv->hw_params->bp_in_en_shift);
1901 /* bp_mask: back pressure mask */
1902 if (netif_is_multiqueue(priv->dev))
1903 reg |= priv->hw_params->bp_in_mask;
1905 reg &= ~priv->hw_params->bp_in_mask;
1906 bcmgenet_bp_mc_set(priv, reg);
1909 /* Enable MDIO interrupts on GENET v3+ */
1910 if (priv->hw_params->flags & GENET_HAS_MDIO_INTR)
1911 int0_enable |= (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR);
1913 /* Enable Rx priority queue interrupts */
1914 for (i = 0; i < priv->hw_params->rx_queues; ++i)
1915 int1_enable |= (1 << (UMAC_IRQ1_RX_INTR_SHIFT + i));
1917 /* Enable Tx priority queue interrupts */
1918 for (i = 0; i < priv->hw_params->tx_queues; ++i)
1919 int1_enable |= (1 << i);
1921 bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
1922 bcmgenet_intrl2_1_writel(priv, int1_enable, INTRL2_CPU_MASK_CLEAR);
1924 /* Enable rx/tx engine.*/
1925 dev_dbg(kdev, "done init umac\n");
1930 /* Initialize a Tx ring along with corresponding hardware registers */
1931 static void bcmgenet_init_tx_ring(struct bcmgenet_priv *priv,
1932 unsigned int index, unsigned int size,
1933 unsigned int start_ptr, unsigned int end_ptr)
1935 struct bcmgenet_tx_ring *ring = &priv->tx_rings[index];
1936 u32 words_per_bd = WORDS_PER_BD(priv);
1937 u32 flow_period_val = 0;
1939 spin_lock_init(&ring->lock);
1941 ring->index = index;
1942 if (index == DESC_INDEX) {
1944 ring->int_enable = bcmgenet_tx_ring16_int_enable;
1945 ring->int_disable = bcmgenet_tx_ring16_int_disable;
1947 ring->queue = index + 1;
1948 ring->int_enable = bcmgenet_tx_ring_int_enable;
1949 ring->int_disable = bcmgenet_tx_ring_int_disable;
1951 ring->cbs = priv->tx_cbs + start_ptr;
1953 ring->clean_ptr = start_ptr;
1955 ring->free_bds = size;
1956 ring->write_ptr = start_ptr;
1957 ring->cb_ptr = start_ptr;
1958 ring->end_ptr = end_ptr - 1;
1959 ring->prod_index = 0;
1961 /* Set flow period for ring != 16 */
1962 if (index != DESC_INDEX)
1963 flow_period_val = ENET_MAX_MTU_SIZE << 16;
1965 bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_PROD_INDEX);
1966 bcmgenet_tdma_ring_writel(priv, index, 0, TDMA_CONS_INDEX);
1967 bcmgenet_tdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH);
1968 /* Disable rate control for now */
1969 bcmgenet_tdma_ring_writel(priv, index, flow_period_val,
1971 bcmgenet_tdma_ring_writel(priv, index,
1972 ((size << DMA_RING_SIZE_SHIFT) |
1973 RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
1975 /* Set start and end address, read and write pointers */
1976 bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
1978 bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
1980 bcmgenet_tdma_ring_writel(priv, index, start_ptr * words_per_bd,
1982 bcmgenet_tdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
1986 /* Initialize a RDMA ring */
1987 static int bcmgenet_init_rx_ring(struct bcmgenet_priv *priv,
1988 unsigned int index, unsigned int size,
1989 unsigned int start_ptr, unsigned int end_ptr)
1991 struct bcmgenet_rx_ring *ring = &priv->rx_rings[index];
1992 u32 words_per_bd = WORDS_PER_BD(priv);
1996 ring->index = index;
1997 if (index == DESC_INDEX) {
1998 ring->int_enable = bcmgenet_rx_ring16_int_enable;
1999 ring->int_disable = bcmgenet_rx_ring16_int_disable;
2001 ring->int_enable = bcmgenet_rx_ring_int_enable;
2002 ring->int_disable = bcmgenet_rx_ring_int_disable;
2004 ring->cbs = priv->rx_cbs + start_ptr;
2007 ring->read_ptr = start_ptr;
2008 ring->cb_ptr = start_ptr;
2009 ring->end_ptr = end_ptr - 1;
2011 ret = bcmgenet_alloc_rx_buffers(priv, ring);
2015 bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_PROD_INDEX);
2016 bcmgenet_rdma_ring_writel(priv, index, 0, RDMA_CONS_INDEX);
2017 bcmgenet_rdma_ring_writel(priv, index, 1, DMA_MBUF_DONE_THRESH);
2018 bcmgenet_rdma_ring_writel(priv, index,
2019 ((size << DMA_RING_SIZE_SHIFT) |
2020 RX_BUF_LENGTH), DMA_RING_BUF_SIZE);
2021 bcmgenet_rdma_ring_writel(priv, index,
2022 (DMA_FC_THRESH_LO <<
2023 DMA_XOFF_THRESHOLD_SHIFT) |
2024 DMA_FC_THRESH_HI, RDMA_XON_XOFF_THRESH);
2026 /* Set start and end address, read and write pointers */
2027 bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2029 bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2031 bcmgenet_rdma_ring_writel(priv, index, start_ptr * words_per_bd,
2033 bcmgenet_rdma_ring_writel(priv, index, end_ptr * words_per_bd - 1,
2039 static void bcmgenet_init_tx_napi(struct bcmgenet_priv *priv)
2042 struct bcmgenet_tx_ring *ring;
2044 for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2045 ring = &priv->tx_rings[i];
2046 netif_napi_add(priv->dev, &ring->napi, bcmgenet_tx_poll, 64);
2049 ring = &priv->tx_rings[DESC_INDEX];
2050 netif_napi_add(priv->dev, &ring->napi, bcmgenet_tx_poll, 64);
2053 static void bcmgenet_enable_tx_napi(struct bcmgenet_priv *priv)
2056 struct bcmgenet_tx_ring *ring;
2058 for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2059 ring = &priv->tx_rings[i];
2060 napi_enable(&ring->napi);
2063 ring = &priv->tx_rings[DESC_INDEX];
2064 napi_enable(&ring->napi);
2067 static void bcmgenet_disable_tx_napi(struct bcmgenet_priv *priv)
2070 struct bcmgenet_tx_ring *ring;
2072 for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2073 ring = &priv->tx_rings[i];
2074 napi_disable(&ring->napi);
2077 ring = &priv->tx_rings[DESC_INDEX];
2078 napi_disable(&ring->napi);
2081 static void bcmgenet_fini_tx_napi(struct bcmgenet_priv *priv)
2084 struct bcmgenet_tx_ring *ring;
2086 for (i = 0; i < priv->hw_params->tx_queues; ++i) {
2087 ring = &priv->tx_rings[i];
2088 netif_napi_del(&ring->napi);
2091 ring = &priv->tx_rings[DESC_INDEX];
2092 netif_napi_del(&ring->napi);
2095 /* Initialize Tx queues
2097 * Queues 0-3 are priority-based, each one has 32 descriptors,
2098 * with queue 0 being the highest priority queue.
2100 * Queue 16 is the default Tx queue with
2101 * GENET_Q16_TX_BD_CNT = 256 - 4 * 32 = 128 descriptors.
2103 * The transmit control block pool is then partitioned as follows:
2104 * - Tx queue 0 uses tx_cbs[0..31]
2105 * - Tx queue 1 uses tx_cbs[32..63]
2106 * - Tx queue 2 uses tx_cbs[64..95]
2107 * - Tx queue 3 uses tx_cbs[96..127]
2108 * - Tx queue 16 uses tx_cbs[128..255]
2110 static void bcmgenet_init_tx_queues(struct net_device *dev)
2112 struct bcmgenet_priv *priv = netdev_priv(dev);
2114 u32 dma_ctrl, ring_cfg;
2115 u32 dma_priority[3] = {0, 0, 0};
2117 dma_ctrl = bcmgenet_tdma_readl(priv, DMA_CTRL);
2118 dma_enable = dma_ctrl & DMA_EN;
2119 dma_ctrl &= ~DMA_EN;
2120 bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
2125 /* Enable strict priority arbiter mode */
2126 bcmgenet_tdma_writel(priv, DMA_ARBITER_SP, DMA_ARB_CTRL);
2128 /* Initialize Tx priority queues */
2129 for (i = 0; i < priv->hw_params->tx_queues; i++) {
2130 bcmgenet_init_tx_ring(priv, i, priv->hw_params->tx_bds_per_q,
2131 i * priv->hw_params->tx_bds_per_q,
2132 (i + 1) * priv->hw_params->tx_bds_per_q);
2133 ring_cfg |= (1 << i);
2134 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2135 dma_priority[DMA_PRIO_REG_INDEX(i)] |=
2136 ((GENET_Q0_PRIORITY + i) << DMA_PRIO_REG_SHIFT(i));
2139 /* Initialize Tx default queue 16 */
2140 bcmgenet_init_tx_ring(priv, DESC_INDEX, GENET_Q16_TX_BD_CNT,
2141 priv->hw_params->tx_queues *
2142 priv->hw_params->tx_bds_per_q,
2144 ring_cfg |= (1 << DESC_INDEX);
2145 dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
2146 dma_priority[DMA_PRIO_REG_INDEX(DESC_INDEX)] |=
2147 ((GENET_Q0_PRIORITY + priv->hw_params->tx_queues) <<
2148 DMA_PRIO_REG_SHIFT(DESC_INDEX));
2150 /* Set Tx queue priorities */
2151 bcmgenet_tdma_writel(priv, dma_priority[0], DMA_PRIORITY_0);
2152 bcmgenet_tdma_writel(priv, dma_priority[1], DMA_PRIORITY_1);
2153 bcmgenet_tdma_writel(priv, dma_priority[2], DMA_PRIORITY_2);
2155 /* Initialize Tx NAPI */
2156 bcmgenet_init_tx_napi(priv);
2158 /* Enable Tx queues */
2159 bcmgenet_tdma_writel(priv, ring_cfg, DMA_RING_CFG);
2164 bcmgenet_tdma_writel(priv, dma_ctrl, DMA_CTRL);
2167 static void bcmgenet_init_rx_napi(struct bcmgenet_priv *priv)
2170 struct bcmgenet_rx_ring *ring;
2172 for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2173 ring = &priv->rx_rings[i];
2174 netif_napi_add(priv->dev, &ring->napi, bcmgenet_rx_poll, 64);
2177 ring = &priv->rx_rings[DESC_INDEX];
2178 netif_napi_add(priv->dev, &ring->napi, bcmgenet_rx_poll, 64);
2181 static void bcmgenet_enable_rx_napi(struct bcmgenet_priv *priv)
2184 struct bcmgenet_rx_ring *ring;
2186 for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2187 ring = &priv->rx_rings[i];
2188 napi_enable(&ring->napi);
2191 ring = &priv->rx_rings[DESC_INDEX];
2192 napi_enable(&ring->napi);
2195 static void bcmgenet_disable_rx_napi(struct bcmgenet_priv *priv)
2198 struct bcmgenet_rx_ring *ring;
2200 for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2201 ring = &priv->rx_rings[i];
2202 napi_disable(&ring->napi);
2205 ring = &priv->rx_rings[DESC_INDEX];
2206 napi_disable(&ring->napi);
2209 static void bcmgenet_fini_rx_napi(struct bcmgenet_priv *priv)
2212 struct bcmgenet_rx_ring *ring;
2214 for (i = 0; i < priv->hw_params->rx_queues; ++i) {
2215 ring = &priv->rx_rings[i];
2216 netif_napi_del(&ring->napi);
2219 ring = &priv->rx_rings[DESC_INDEX];
2220 netif_napi_del(&ring->napi);
2223 /* Initialize Rx queues
2225 * Queues 0-15 are priority queues. Hardware Filtering Block (HFB) can be
2226 * used to direct traffic to these queues.
2228 * Queue 16 is the default Rx queue with GENET_Q16_RX_BD_CNT descriptors.
2230 static int bcmgenet_init_rx_queues(struct net_device *dev)
2232 struct bcmgenet_priv *priv = netdev_priv(dev);
2239 dma_ctrl = bcmgenet_rdma_readl(priv, DMA_CTRL);
2240 dma_enable = dma_ctrl & DMA_EN;
2241 dma_ctrl &= ~DMA_EN;
2242 bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
2247 /* Initialize Rx priority queues */
2248 for (i = 0; i < priv->hw_params->rx_queues; i++) {
2249 ret = bcmgenet_init_rx_ring(priv, i,
2250 priv->hw_params->rx_bds_per_q,
2251 i * priv->hw_params->rx_bds_per_q,
2253 priv->hw_params->rx_bds_per_q);
2257 ring_cfg |= (1 << i);
2258 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2261 /* Initialize Rx default queue 16 */
2262 ret = bcmgenet_init_rx_ring(priv, DESC_INDEX, GENET_Q16_RX_BD_CNT,
2263 priv->hw_params->rx_queues *
2264 priv->hw_params->rx_bds_per_q,
2269 ring_cfg |= (1 << DESC_INDEX);
2270 dma_ctrl |= (1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT));
2272 /* Initialize Rx NAPI */
2273 bcmgenet_init_rx_napi(priv);
2276 bcmgenet_rdma_writel(priv, ring_cfg, DMA_RING_CFG);
2278 /* Configure ring as descriptor ring and re-enable DMA if enabled */
2281 bcmgenet_rdma_writel(priv, dma_ctrl, DMA_CTRL);
2286 static int bcmgenet_dma_teardown(struct bcmgenet_priv *priv)
2294 /* Disable TDMA to stop add more frames in TX DMA */
2295 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2297 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2299 /* Check TDMA status register to confirm TDMA is disabled */
2300 while (timeout++ < DMA_TIMEOUT_VAL) {
2301 reg = bcmgenet_tdma_readl(priv, DMA_STATUS);
2302 if (reg & DMA_DISABLED)
2308 if (timeout == DMA_TIMEOUT_VAL) {
2309 netdev_warn(priv->dev, "Timed out while disabling TX DMA\n");
2313 /* Wait 10ms for packet drain in both tx and rx dma */
2314 usleep_range(10000, 20000);
2317 reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2319 bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2322 /* Check RDMA status register to confirm RDMA is disabled */
2323 while (timeout++ < DMA_TIMEOUT_VAL) {
2324 reg = bcmgenet_rdma_readl(priv, DMA_STATUS);
2325 if (reg & DMA_DISABLED)
2331 if (timeout == DMA_TIMEOUT_VAL) {
2332 netdev_warn(priv->dev, "Timed out while disabling RX DMA\n");
2337 for (i = 0; i < priv->hw_params->rx_queues; i++)
2338 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2339 reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2341 bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2344 for (i = 0; i < priv->hw_params->tx_queues; i++)
2345 dma_ctrl |= (1 << (i + DMA_RING_BUF_EN_SHIFT));
2346 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2348 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2353 static void bcmgenet_fini_dma(struct bcmgenet_priv *priv)
2357 bcmgenet_fini_rx_napi(priv);
2358 bcmgenet_fini_tx_napi(priv);
2361 bcmgenet_dma_teardown(priv);
2363 for (i = 0; i < priv->num_tx_bds; i++) {
2364 if (priv->tx_cbs[i].skb != NULL) {
2365 dev_kfree_skb(priv->tx_cbs[i].skb);
2366 priv->tx_cbs[i].skb = NULL;
2370 bcmgenet_free_rx_buffers(priv);
2371 kfree(priv->rx_cbs);
2372 kfree(priv->tx_cbs);
2375 /* init_edma: Initialize DMA control register */
2376 static int bcmgenet_init_dma(struct bcmgenet_priv *priv)
2382 netif_dbg(priv, hw, priv->dev, "%s\n", __func__);
2384 /* Initialize common Rx ring structures */
2385 priv->rx_bds = priv->base + priv->hw_params->rdma_offset;
2386 priv->num_rx_bds = TOTAL_DESC;
2387 priv->rx_cbs = kcalloc(priv->num_rx_bds, sizeof(struct enet_cb),
2392 for (i = 0; i < priv->num_rx_bds; i++) {
2393 cb = priv->rx_cbs + i;
2394 cb->bd_addr = priv->rx_bds + i * DMA_DESC_SIZE;
2397 /* Initialize common TX ring structures */
2398 priv->tx_bds = priv->base + priv->hw_params->tdma_offset;
2399 priv->num_tx_bds = TOTAL_DESC;
2400 priv->tx_cbs = kcalloc(priv->num_tx_bds, sizeof(struct enet_cb),
2402 if (!priv->tx_cbs) {
2403 kfree(priv->rx_cbs);
2407 for (i = 0; i < priv->num_tx_bds; i++) {
2408 cb = priv->tx_cbs + i;
2409 cb->bd_addr = priv->tx_bds + i * DMA_DESC_SIZE;
2413 bcmgenet_rdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE);
2415 /* Initialize Rx queues */
2416 ret = bcmgenet_init_rx_queues(priv->dev);
2418 netdev_err(priv->dev, "failed to initialize Rx queues\n");
2419 bcmgenet_free_rx_buffers(priv);
2420 kfree(priv->rx_cbs);
2421 kfree(priv->tx_cbs);
2426 bcmgenet_tdma_writel(priv, DMA_MAX_BURST_LENGTH, DMA_SCB_BURST_SIZE);
2428 /* Initialize Tx queues */
2429 bcmgenet_init_tx_queues(priv->dev);
2434 /* Interrupt bottom half */
2435 static void bcmgenet_irq_task(struct work_struct *work)
2437 struct bcmgenet_priv *priv = container_of(
2438 work, struct bcmgenet_priv, bcmgenet_irq_work);
2440 netif_dbg(priv, intr, priv->dev, "%s\n", __func__);
2442 if (priv->irq0_stat & UMAC_IRQ_MPD_R) {
2443 priv->irq0_stat &= ~UMAC_IRQ_MPD_R;
2444 netif_dbg(priv, wol, priv->dev,
2445 "magic packet detected, waking up\n");
2446 bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
2449 /* Link UP/DOWN event */
2450 if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) &&
2451 (priv->irq0_stat & UMAC_IRQ_LINK_EVENT)) {
2452 phy_mac_interrupt(priv->phydev,
2453 !!(priv->irq0_stat & UMAC_IRQ_LINK_UP));
2454 priv->irq0_stat &= ~UMAC_IRQ_LINK_EVENT;
2458 /* bcmgenet_isr1: handle Rx and Tx priority queues */
2459 static irqreturn_t bcmgenet_isr1(int irq, void *dev_id)
2461 struct bcmgenet_priv *priv = dev_id;
2462 struct bcmgenet_rx_ring *rx_ring;
2463 struct bcmgenet_tx_ring *tx_ring;
2466 /* Save irq status for bottom-half processing. */
2468 bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_STAT) &
2469 ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
2471 /* clear interrupts */
2472 bcmgenet_intrl2_1_writel(priv, priv->irq1_stat, INTRL2_CPU_CLEAR);
2474 netif_dbg(priv, intr, priv->dev,
2475 "%s: IRQ=0x%x\n", __func__, priv->irq1_stat);
2477 /* Check Rx priority queue interrupts */
2478 for (index = 0; index < priv->hw_params->rx_queues; index++) {
2479 if (!(priv->irq1_stat & BIT(UMAC_IRQ1_RX_INTR_SHIFT + index)))
2482 rx_ring = &priv->rx_rings[index];
2484 if (likely(napi_schedule_prep(&rx_ring->napi))) {
2485 rx_ring->int_disable(rx_ring);
2486 __napi_schedule(&rx_ring->napi);
2490 /* Check Tx priority queue interrupts */
2491 for (index = 0; index < priv->hw_params->tx_queues; index++) {
2492 if (!(priv->irq1_stat & BIT(index)))
2495 tx_ring = &priv->tx_rings[index];
2497 if (likely(napi_schedule_prep(&tx_ring->napi))) {
2498 tx_ring->int_disable(tx_ring);
2499 __napi_schedule(&tx_ring->napi);
2506 /* bcmgenet_isr0: handle Rx and Tx default queues + other stuff */
2507 static irqreturn_t bcmgenet_isr0(int irq, void *dev_id)
2509 struct bcmgenet_priv *priv = dev_id;
2510 struct bcmgenet_rx_ring *rx_ring;
2511 struct bcmgenet_tx_ring *tx_ring;
2513 /* Save irq status for bottom-half processing. */
2515 bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_STAT) &
2516 ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
2518 /* clear interrupts */
2519 bcmgenet_intrl2_0_writel(priv, priv->irq0_stat, INTRL2_CPU_CLEAR);
2521 netif_dbg(priv, intr, priv->dev,
2522 "IRQ=0x%x\n", priv->irq0_stat);
2524 if (priv->irq0_stat & UMAC_IRQ_RXDMA_DONE) {
2525 rx_ring = &priv->rx_rings[DESC_INDEX];
2527 if (likely(napi_schedule_prep(&rx_ring->napi))) {
2528 rx_ring->int_disable(rx_ring);
2529 __napi_schedule(&rx_ring->napi);
2533 if (priv->irq0_stat & UMAC_IRQ_TXDMA_DONE) {
2534 tx_ring = &priv->tx_rings[DESC_INDEX];
2536 if (likely(napi_schedule_prep(&tx_ring->napi))) {
2537 tx_ring->int_disable(tx_ring);
2538 __napi_schedule(&tx_ring->napi);
2542 if (priv->irq0_stat & (UMAC_IRQ_PHY_DET_R |
2543 UMAC_IRQ_PHY_DET_F |
2544 UMAC_IRQ_LINK_EVENT |
2548 /* all other interested interrupts handled in bottom half */
2549 schedule_work(&priv->bcmgenet_irq_work);
2552 if ((priv->hw_params->flags & GENET_HAS_MDIO_INTR) &&
2553 priv->irq0_stat & (UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR)) {
2554 priv->irq0_stat &= ~(UMAC_IRQ_MDIO_DONE | UMAC_IRQ_MDIO_ERROR);
2561 static irqreturn_t bcmgenet_wol_isr(int irq, void *dev_id)
2563 struct bcmgenet_priv *priv = dev_id;
2565 pm_wakeup_event(&priv->pdev->dev, 0);
2570 #ifdef CONFIG_NET_POLL_CONTROLLER
2571 static void bcmgenet_poll_controller(struct net_device *dev)
2573 struct bcmgenet_priv *priv = netdev_priv(dev);
2575 /* Invoke the main RX/TX interrupt handler */
2576 disable_irq(priv->irq0);
2577 bcmgenet_isr0(priv->irq0, priv);
2578 enable_irq(priv->irq0);
2580 /* And the interrupt handler for RX/TX priority queues */
2581 disable_irq(priv->irq1);
2582 bcmgenet_isr1(priv->irq1, priv);
2583 enable_irq(priv->irq1);
2587 static void bcmgenet_umac_reset(struct bcmgenet_priv *priv)
2591 reg = bcmgenet_rbuf_ctrl_get(priv);
2593 bcmgenet_rbuf_ctrl_set(priv, reg);
2597 bcmgenet_rbuf_ctrl_set(priv, reg);
2601 static void bcmgenet_set_hw_addr(struct bcmgenet_priv *priv,
2602 unsigned char *addr)
2604 bcmgenet_umac_writel(priv, (addr[0] << 24) | (addr[1] << 16) |
2605 (addr[2] << 8) | addr[3], UMAC_MAC0);
2606 bcmgenet_umac_writel(priv, (addr[4] << 8) | addr[5], UMAC_MAC1);
2609 /* Returns a reusable dma control register value */
2610 static u32 bcmgenet_dma_disable(struct bcmgenet_priv *priv)
2616 dma_ctrl = 1 << (DESC_INDEX + DMA_RING_BUF_EN_SHIFT) | DMA_EN;
2617 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2619 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2621 reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2623 bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2625 bcmgenet_umac_writel(priv, 1, UMAC_TX_FLUSH);
2627 bcmgenet_umac_writel(priv, 0, UMAC_TX_FLUSH);
2632 static void bcmgenet_enable_dma(struct bcmgenet_priv *priv, u32 dma_ctrl)
2636 reg = bcmgenet_rdma_readl(priv, DMA_CTRL);
2638 bcmgenet_rdma_writel(priv, reg, DMA_CTRL);
2640 reg = bcmgenet_tdma_readl(priv, DMA_CTRL);
2642 bcmgenet_tdma_writel(priv, reg, DMA_CTRL);
2645 static bool bcmgenet_hfb_is_filter_enabled(struct bcmgenet_priv *priv,
2651 offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
2652 reg = bcmgenet_hfb_reg_readl(priv, offset);
2653 return !!(reg & (1 << (f_index % 32)));
2656 static void bcmgenet_hfb_enable_filter(struct bcmgenet_priv *priv, u32 f_index)
2661 offset = HFB_FLT_ENABLE_V3PLUS + (f_index < 32) * sizeof(u32);
2662 reg = bcmgenet_hfb_reg_readl(priv, offset);
2663 reg |= (1 << (f_index % 32));
2664 bcmgenet_hfb_reg_writel(priv, reg, offset);
2667 static void bcmgenet_hfb_set_filter_rx_queue_mapping(struct bcmgenet_priv *priv,
2668 u32 f_index, u32 rx_queue)
2673 offset = f_index / 8;
2674 reg = bcmgenet_rdma_readl(priv, DMA_INDEX2RING_0 + offset);
2675 reg &= ~(0xF << (4 * (f_index % 8)));
2676 reg |= ((rx_queue & 0xF) << (4 * (f_index % 8)));
2677 bcmgenet_rdma_writel(priv, reg, DMA_INDEX2RING_0 + offset);
2680 static void bcmgenet_hfb_set_filter_length(struct bcmgenet_priv *priv,
2681 u32 f_index, u32 f_length)
2686 offset = HFB_FLT_LEN_V3PLUS +
2687 ((priv->hw_params->hfb_filter_cnt - 1 - f_index) / 4) *
2689 reg = bcmgenet_hfb_reg_readl(priv, offset);
2690 reg &= ~(0xFF << (8 * (f_index % 4)));
2691 reg |= ((f_length & 0xFF) << (8 * (f_index % 4)));
2692 bcmgenet_hfb_reg_writel(priv, reg, offset);
2695 static int bcmgenet_hfb_find_unused_filter(struct bcmgenet_priv *priv)
2699 for (f_index = 0; f_index < priv->hw_params->hfb_filter_cnt; f_index++)
2700 if (!bcmgenet_hfb_is_filter_enabled(priv, f_index))
2706 /* bcmgenet_hfb_add_filter
2708 * Add new filter to Hardware Filter Block to match and direct Rx traffic to
2711 * f_data is an array of unsigned 32-bit integers where each 32-bit integer
2712 * provides filter data for 2 bytes (4 nibbles) of Rx frame:
2714 * bits 31:20 - unused
2715 * bit 19 - nibble 0 match enable
2716 * bit 18 - nibble 1 match enable
2717 * bit 17 - nibble 2 match enable
2718 * bit 16 - nibble 3 match enable
2719 * bits 15:12 - nibble 0 data
2720 * bits 11:8 - nibble 1 data
2721 * bits 7:4 - nibble 2 data
2722 * bits 3:0 - nibble 3 data
2725 * In order to match:
2726 * - Ethernet frame type = 0x0800 (IP)
2727 * - IP version field = 4
2728 * - IP protocol field = 0x11 (UDP)
2730 * The following filter is needed:
2731 * u32 hfb_filter_ipv4_udp[] = {
2732 * Rx frame offset 0x00: 0x00000000, 0x00000000, 0x00000000, 0x00000000,
2733 * Rx frame offset 0x08: 0x00000000, 0x00000000, 0x000F0800, 0x00084000,
2734 * Rx frame offset 0x10: 0x00000000, 0x00000000, 0x00000000, 0x00030011,
2737 * To add the filter to HFB and direct the traffic to Rx queue 0, call:
2738 * bcmgenet_hfb_add_filter(priv, hfb_filter_ipv4_udp,
2739 * ARRAY_SIZE(hfb_filter_ipv4_udp), 0);
2741 int bcmgenet_hfb_add_filter(struct bcmgenet_priv *priv, u32 *f_data,
2742 u32 f_length, u32 rx_queue)
2747 f_index = bcmgenet_hfb_find_unused_filter(priv);
2751 if (f_length > priv->hw_params->hfb_filter_size)
2754 for (i = 0; i < f_length; i++)
2755 bcmgenet_hfb_writel(priv, f_data[i],
2756 (f_index * priv->hw_params->hfb_filter_size + i) *
2759 bcmgenet_hfb_set_filter_length(priv, f_index, 2 * f_length);
2760 bcmgenet_hfb_set_filter_rx_queue_mapping(priv, f_index, rx_queue);
2761 bcmgenet_hfb_enable_filter(priv, f_index);
2762 bcmgenet_hfb_reg_writel(priv, 0x1, HFB_CTRL);
2767 /* bcmgenet_hfb_clear
2769 * Clear Hardware Filter Block and disable all filtering.
2771 static void bcmgenet_hfb_clear(struct bcmgenet_priv *priv)
2775 bcmgenet_hfb_reg_writel(priv, 0x0, HFB_CTRL);
2776 bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS);
2777 bcmgenet_hfb_reg_writel(priv, 0x0, HFB_FLT_ENABLE_V3PLUS + 4);
2779 for (i = DMA_INDEX2RING_0; i <= DMA_INDEX2RING_7; i++)
2780 bcmgenet_rdma_writel(priv, 0x0, i);
2782 for (i = 0; i < (priv->hw_params->hfb_filter_cnt / 4); i++)
2783 bcmgenet_hfb_reg_writel(priv, 0x0,
2784 HFB_FLT_LEN_V3PLUS + i * sizeof(u32));
2786 for (i = 0; i < priv->hw_params->hfb_filter_cnt *
2787 priv->hw_params->hfb_filter_size; i++)
2788 bcmgenet_hfb_writel(priv, 0x0, i * sizeof(u32));
2791 static void bcmgenet_hfb_init(struct bcmgenet_priv *priv)
2793 if (GENET_IS_V1(priv) || GENET_IS_V2(priv))
2796 bcmgenet_hfb_clear(priv);
2799 static void bcmgenet_netif_start(struct net_device *dev)
2801 struct bcmgenet_priv *priv = netdev_priv(dev);
2803 /* Start the network engine */
2804 bcmgenet_enable_rx_napi(priv);
2805 bcmgenet_enable_tx_napi(priv);
2807 umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, true);
2809 netif_tx_start_all_queues(dev);
2811 /* Monitor link interrupts now */
2812 bcmgenet_link_intr_enable(priv);
2814 phy_start(priv->phydev);
2817 static int bcmgenet_open(struct net_device *dev)
2819 struct bcmgenet_priv *priv = netdev_priv(dev);
2820 unsigned long dma_ctrl;
2824 netif_dbg(priv, ifup, dev, "bcmgenet_open\n");
2826 /* Turn on the clock */
2827 clk_prepare_enable(priv->clk);
2829 /* If this is an internal GPHY, power it back on now, before UniMAC is
2830 * brought out of reset as absolutely no UniMAC activity is allowed
2832 if (priv->internal_phy)
2833 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
2835 /* take MAC out of reset */
2836 bcmgenet_umac_reset(priv);
2838 ret = init_umac(priv);
2840 goto err_clk_disable;
2842 /* disable ethernet MAC while updating its registers */
2843 umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, false);
2845 /* Make sure we reflect the value of CRC_CMD_FWD */
2846 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
2847 priv->crc_fwd_en = !!(reg & CMD_CRC_FWD);
2849 bcmgenet_set_hw_addr(priv, dev->dev_addr);
2851 if (priv->internal_phy) {
2852 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
2853 reg |= EXT_ENERGY_DET_MASK;
2854 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
2857 /* Disable RX/TX DMA and flush TX queues */
2858 dma_ctrl = bcmgenet_dma_disable(priv);
2860 /* Reinitialize TDMA and RDMA and SW housekeeping */
2861 ret = bcmgenet_init_dma(priv);
2863 netdev_err(dev, "failed to initialize DMA\n");
2864 goto err_clk_disable;
2867 /* Always enable ring 16 - descriptor ring */
2868 bcmgenet_enable_dma(priv, dma_ctrl);
2871 bcmgenet_hfb_init(priv);
2873 ret = request_irq(priv->irq0, bcmgenet_isr0, IRQF_SHARED,
2876 netdev_err(dev, "can't request IRQ %d\n", priv->irq0);
2880 ret = request_irq(priv->irq1, bcmgenet_isr1, IRQF_SHARED,
2883 netdev_err(dev, "can't request IRQ %d\n", priv->irq1);
2887 ret = bcmgenet_mii_probe(dev);
2889 netdev_err(dev, "failed to connect to PHY\n");
2893 bcmgenet_netif_start(dev);
2898 free_irq(priv->irq1, priv);
2900 free_irq(priv->irq0, priv);
2902 bcmgenet_fini_dma(priv);
2904 clk_disable_unprepare(priv->clk);
2908 static void bcmgenet_netif_stop(struct net_device *dev)
2910 struct bcmgenet_priv *priv = netdev_priv(dev);
2912 netif_tx_stop_all_queues(dev);
2913 phy_stop(priv->phydev);
2914 bcmgenet_intr_disable(priv);
2915 bcmgenet_disable_rx_napi(priv);
2916 bcmgenet_disable_tx_napi(priv);
2918 /* Wait for pending work items to complete. Since interrupts are
2919 * disabled no new work will be scheduled.
2921 cancel_work_sync(&priv->bcmgenet_irq_work);
2923 priv->old_link = -1;
2924 priv->old_speed = -1;
2925 priv->old_duplex = -1;
2926 priv->old_pause = -1;
2929 static int bcmgenet_close(struct net_device *dev)
2931 struct bcmgenet_priv *priv = netdev_priv(dev);
2934 netif_dbg(priv, ifdown, dev, "bcmgenet_close\n");
2936 bcmgenet_netif_stop(dev);
2938 /* Really kill the PHY state machine and disconnect from it */
2939 phy_disconnect(priv->phydev);
2941 /* Disable MAC receive */
2942 umac_enable_set(priv, CMD_RX_EN, false);
2944 ret = bcmgenet_dma_teardown(priv);
2948 /* Disable MAC transmit. TX DMA disabled have to done before this */
2949 umac_enable_set(priv, CMD_TX_EN, false);
2952 bcmgenet_tx_reclaim_all(dev);
2953 bcmgenet_fini_dma(priv);
2955 free_irq(priv->irq0, priv);
2956 free_irq(priv->irq1, priv);
2958 if (priv->internal_phy)
2959 ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
2961 clk_disable_unprepare(priv->clk);
2966 static void bcmgenet_dump_tx_queue(struct bcmgenet_tx_ring *ring)
2968 struct bcmgenet_priv *priv = ring->priv;
2969 u32 p_index, c_index, intsts, intmsk;
2970 struct netdev_queue *txq;
2971 unsigned int free_bds;
2972 unsigned long flags;
2975 if (!netif_msg_tx_err(priv))
2978 txq = netdev_get_tx_queue(priv->dev, ring->queue);
2980 spin_lock_irqsave(&ring->lock, flags);
2981 if (ring->index == DESC_INDEX) {
2982 intsts = ~bcmgenet_intrl2_0_readl(priv, INTRL2_CPU_MASK_STATUS);
2983 intmsk = UMAC_IRQ_TXDMA_DONE | UMAC_IRQ_TXDMA_MBDONE;
2985 intsts = ~bcmgenet_intrl2_1_readl(priv, INTRL2_CPU_MASK_STATUS);
2986 intmsk = 1 << ring->index;
2988 c_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_CONS_INDEX);
2989 p_index = bcmgenet_tdma_ring_readl(priv, ring->index, TDMA_PROD_INDEX);
2990 txq_stopped = netif_tx_queue_stopped(txq);
2991 free_bds = ring->free_bds;
2992 spin_unlock_irqrestore(&ring->lock, flags);
2994 netif_err(priv, tx_err, priv->dev, "Ring %d queue %d status summary\n"
2995 "TX queue status: %s, interrupts: %s\n"
2996 "(sw)free_bds: %d (sw)size: %d\n"
2997 "(sw)p_index: %d (hw)p_index: %d\n"
2998 "(sw)c_index: %d (hw)c_index: %d\n"
2999 "(sw)clean_p: %d (sw)write_p: %d\n"
3000 "(sw)cb_ptr: %d (sw)end_ptr: %d\n",
3001 ring->index, ring->queue,
3002 txq_stopped ? "stopped" : "active",
3003 intsts & intmsk ? "enabled" : "disabled",
3004 free_bds, ring->size,
3005 ring->prod_index, p_index & DMA_P_INDEX_MASK,
3006 ring->c_index, c_index & DMA_C_INDEX_MASK,
3007 ring->clean_ptr, ring->write_ptr,
3008 ring->cb_ptr, ring->end_ptr);
3011 static void bcmgenet_timeout(struct net_device *dev)
3013 struct bcmgenet_priv *priv = netdev_priv(dev);
3014 u32 int0_enable = 0;
3015 u32 int1_enable = 0;
3018 netif_dbg(priv, tx_err, dev, "bcmgenet_timeout\n");
3020 for (q = 0; q < priv->hw_params->tx_queues; q++)
3021 bcmgenet_dump_tx_queue(&priv->tx_rings[q]);
3022 bcmgenet_dump_tx_queue(&priv->tx_rings[DESC_INDEX]);
3024 bcmgenet_tx_reclaim_all(dev);
3026 for (q = 0; q < priv->hw_params->tx_queues; q++)
3027 int1_enable |= (1 << q);
3029 int0_enable = UMAC_IRQ_TXDMA_DONE;
3031 /* Re-enable TX interrupts if disabled */
3032 bcmgenet_intrl2_0_writel(priv, int0_enable, INTRL2_CPU_MASK_CLEAR);
3033 bcmgenet_intrl2_1_writel(priv, int1_enable, INTRL2_CPU_MASK_CLEAR);
3035 dev->trans_start = jiffies;
3037 dev->stats.tx_errors++;
3039 netif_tx_wake_all_queues(dev);
3042 #define MAX_MC_COUNT 16
3044 static inline void bcmgenet_set_mdf_addr(struct bcmgenet_priv *priv,
3045 unsigned char *addr,
3051 bcmgenet_umac_writel(priv, addr[0] << 8 | addr[1],
3052 UMAC_MDF_ADDR + (*i * 4));
3053 bcmgenet_umac_writel(priv, addr[2] << 24 | addr[3] << 16 |
3054 addr[4] << 8 | addr[5],
3055 UMAC_MDF_ADDR + ((*i + 1) * 4));
3056 reg = bcmgenet_umac_readl(priv, UMAC_MDF_CTRL);
3057 reg |= (1 << (MAX_MC_COUNT - *mc));
3058 bcmgenet_umac_writel(priv, reg, UMAC_MDF_CTRL);
3063 static void bcmgenet_set_rx_mode(struct net_device *dev)
3065 struct bcmgenet_priv *priv = netdev_priv(dev);
3066 struct netdev_hw_addr *ha;
3070 netif_dbg(priv, hw, dev, "%s: %08X\n", __func__, dev->flags);
3072 /* Promiscuous mode */
3073 reg = bcmgenet_umac_readl(priv, UMAC_CMD);
3074 if (dev->flags & IFF_PROMISC) {
3076 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
3077 bcmgenet_umac_writel(priv, 0, UMAC_MDF_CTRL);
3080 reg &= ~CMD_PROMISC;
3081 bcmgenet_umac_writel(priv, reg, UMAC_CMD);
3084 /* UniMac doesn't support ALLMULTI */
3085 if (dev->flags & IFF_ALLMULTI) {
3086 netdev_warn(dev, "ALLMULTI is not supported\n");
3090 /* update MDF filter */
3094 bcmgenet_set_mdf_addr(priv, dev->broadcast, &i, &mc);
3095 /* my own address.*/
3096 bcmgenet_set_mdf_addr(priv, dev->dev_addr, &i, &mc);
3098 if (netdev_uc_count(dev) > (MAX_MC_COUNT - mc))
3101 if (!netdev_uc_empty(dev))
3102 netdev_for_each_uc_addr(ha, dev)
3103 bcmgenet_set_mdf_addr(priv, ha->addr, &i, &mc);
3105 if (netdev_mc_empty(dev) || netdev_mc_count(dev) >= (MAX_MC_COUNT - mc))
3108 netdev_for_each_mc_addr(ha, dev)
3109 bcmgenet_set_mdf_addr(priv, ha->addr, &i, &mc);
3112 /* Set the hardware MAC address. */
3113 static int bcmgenet_set_mac_addr(struct net_device *dev, void *p)
3115 struct sockaddr *addr = p;
3117 /* Setting the MAC address at the hardware level is not possible
3118 * without disabling the UniMAC RX/TX enable bits.
3120 if (netif_running(dev))
3123 ether_addr_copy(dev->dev_addr, addr->sa_data);
3128 static const struct net_device_ops bcmgenet_netdev_ops = {
3129 .ndo_open = bcmgenet_open,
3130 .ndo_stop = bcmgenet_close,
3131 .ndo_start_xmit = bcmgenet_xmit,
3132 .ndo_tx_timeout = bcmgenet_timeout,
3133 .ndo_set_rx_mode = bcmgenet_set_rx_mode,
3134 .ndo_set_mac_address = bcmgenet_set_mac_addr,
3135 .ndo_do_ioctl = bcmgenet_ioctl,
3136 .ndo_set_features = bcmgenet_set_features,
3137 #ifdef CONFIG_NET_POLL_CONTROLLER
3138 .ndo_poll_controller = bcmgenet_poll_controller,
3142 /* Array of GENET hardware parameters/characteristics */
3143 static struct bcmgenet_hw_params bcmgenet_hw_params[] = {
3149 .bp_in_en_shift = 16,
3150 .bp_in_mask = 0xffff,
3151 .hfb_filter_cnt = 16,
3153 .hfb_offset = 0x1000,
3154 .rdma_offset = 0x2000,
3155 .tdma_offset = 0x3000,
3163 .bp_in_en_shift = 16,
3164 .bp_in_mask = 0xffff,
3165 .hfb_filter_cnt = 16,
3167 .tbuf_offset = 0x0600,
3168 .hfb_offset = 0x1000,
3169 .hfb_reg_offset = 0x2000,
3170 .rdma_offset = 0x3000,
3171 .tdma_offset = 0x4000,
3173 .flags = GENET_HAS_EXT,
3180 .bp_in_en_shift = 17,
3181 .bp_in_mask = 0x1ffff,
3182 .hfb_filter_cnt = 48,
3183 .hfb_filter_size = 128,
3185 .tbuf_offset = 0x0600,
3186 .hfb_offset = 0x8000,
3187 .hfb_reg_offset = 0xfc00,
3188 .rdma_offset = 0x10000,
3189 .tdma_offset = 0x11000,
3191 .flags = GENET_HAS_EXT | GENET_HAS_MDIO_INTR |
3192 GENET_HAS_MOCA_LINK_DET,
3199 .bp_in_en_shift = 17,
3200 .bp_in_mask = 0x1ffff,
3201 .hfb_filter_cnt = 48,
3202 .hfb_filter_size = 128,
3204 .tbuf_offset = 0x0600,
3205 .hfb_offset = 0x8000,
3206 .hfb_reg_offset = 0xfc00,
3207 .rdma_offset = 0x2000,
3208 .tdma_offset = 0x4000,
3210 .flags = GENET_HAS_40BITS | GENET_HAS_EXT |
3211 GENET_HAS_MDIO_INTR | GENET_HAS_MOCA_LINK_DET,
3215 /* Infer hardware parameters from the detected GENET version */
3216 static void bcmgenet_set_hw_params(struct bcmgenet_priv *priv)
3218 struct bcmgenet_hw_params *params;
3223 if (GENET_IS_V4(priv)) {
3224 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
3225 genet_dma_ring_regs = genet_dma_ring_regs_v4;
3226 priv->dma_rx_chk_bit = DMA_RX_CHK_V3PLUS;
3227 priv->version = GENET_V4;
3228 } else if (GENET_IS_V3(priv)) {
3229 bcmgenet_dma_regs = bcmgenet_dma_regs_v3plus;
3230 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3231 priv->dma_rx_chk_bit = DMA_RX_CHK_V3PLUS;
3232 priv->version = GENET_V3;
3233 } else if (GENET_IS_V2(priv)) {
3234 bcmgenet_dma_regs = bcmgenet_dma_regs_v2;
3235 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3236 priv->dma_rx_chk_bit = DMA_RX_CHK_V12;
3237 priv->version = GENET_V2;
3238 } else if (GENET_IS_V1(priv)) {
3239 bcmgenet_dma_regs = bcmgenet_dma_regs_v1;
3240 genet_dma_ring_regs = genet_dma_ring_regs_v123;
3241 priv->dma_rx_chk_bit = DMA_RX_CHK_V12;
3242 priv->version = GENET_V1;
3245 /* enum genet_version starts at 1 */
3246 priv->hw_params = &bcmgenet_hw_params[priv->version];
3247 params = priv->hw_params;
3249 /* Read GENET HW version */
3250 reg = bcmgenet_sys_readl(priv, SYS_REV_CTRL);
3251 major = (reg >> 24 & 0x0f);
3254 else if (major == 0)
3256 if (major != priv->version) {
3257 dev_err(&priv->pdev->dev,
3258 "GENET version mismatch, got: %d, configured for: %d\n",
3259 major, priv->version);
3262 /* Print the GENET core version */
3263 dev_info(&priv->pdev->dev, "GENET " GENET_VER_FMT,
3264 major, (reg >> 16) & 0x0f, reg & 0xffff);
3266 /* Store the integrated PHY revision for the MDIO probing function
3267 * to pass this information to the PHY driver. The PHY driver expects
3268 * to find the PHY major revision in bits 15:8 while the GENET register
3269 * stores that information in bits 7:0, account for that.
3271 * On newer chips, starting with PHY revision G0, a new scheme is
3272 * deployed similar to the Starfighter 2 switch with GPHY major
3273 * revision in bits 15:8 and patch level in bits 7:0. Major revision 0
3274 * is reserved as well as special value 0x01ff, we have a small
3275 * heuristic to check for the new GPHY revision and re-arrange things
3276 * so the GPHY driver is happy.
3278 gphy_rev = reg & 0xffff;
3280 /* This is the good old scheme, just GPHY major, no minor nor patch */
3281 if ((gphy_rev & 0xf0) != 0)
3282 priv->gphy_rev = gphy_rev << 8;
3284 /* This is the new scheme, GPHY major rolls over with 0x10 = rev G0 */
3285 else if ((gphy_rev & 0xff00) != 0)
3286 priv->gphy_rev = gphy_rev;
3288 /* This is reserved so should require special treatment */
3289 else if (gphy_rev == 0 || gphy_rev == 0x01ff) {
3290 pr_warn("Invalid GPHY revision detected: 0x%04x\n", gphy_rev);
3294 #ifdef CONFIG_PHYS_ADDR_T_64BIT
3295 if (!(params->flags & GENET_HAS_40BITS))
3296 pr_warn("GENET does not support 40-bits PA\n");
3299 pr_debug("Configuration for version: %d\n"
3300 "TXq: %1d, TXqBDs: %1d, RXq: %1d, RXqBDs: %1d\n"
3301 "BP << en: %2d, BP msk: 0x%05x\n"
3302 "HFB count: %2d, QTAQ msk: 0x%05x\n"
3303 "TBUF: 0x%04x, HFB: 0x%04x, HFBreg: 0x%04x\n"
3304 "RDMA: 0x%05x, TDMA: 0x%05x\n"
3307 params->tx_queues, params->tx_bds_per_q,
3308 params->rx_queues, params->rx_bds_per_q,
3309 params->bp_in_en_shift, params->bp_in_mask,
3310 params->hfb_filter_cnt, params->qtag_mask,
3311 params->tbuf_offset, params->hfb_offset,
3312 params->hfb_reg_offset,
3313 params->rdma_offset, params->tdma_offset,
3314 params->words_per_bd);
3317 static const struct of_device_id bcmgenet_match[] = {
3318 { .compatible = "brcm,genet-v1", .data = (void *)GENET_V1 },
3319 { .compatible = "brcm,genet-v2", .data = (void *)GENET_V2 },
3320 { .compatible = "brcm,genet-v3", .data = (void *)GENET_V3 },
3321 { .compatible = "brcm,genet-v4", .data = (void *)GENET_V4 },
3324 MODULE_DEVICE_TABLE(of, bcmgenet_match);
3326 static int bcmgenet_probe(struct platform_device *pdev)
3328 struct bcmgenet_platform_data *pd = pdev->dev.platform_data;
3329 struct device_node *dn = pdev->dev.of_node;
3330 const struct of_device_id *of_id = NULL;
3331 struct bcmgenet_priv *priv;
3332 struct net_device *dev;
3333 const void *macaddr;
3337 /* Up to GENET_MAX_MQ_CNT + 1 TX queues and RX queues */
3338 dev = alloc_etherdev_mqs(sizeof(*priv), GENET_MAX_MQ_CNT + 1,
3339 GENET_MAX_MQ_CNT + 1);
3341 dev_err(&pdev->dev, "can't allocate net device\n");
3346 of_id = of_match_node(bcmgenet_match, dn);
3351 priv = netdev_priv(dev);
3352 priv->irq0 = platform_get_irq(pdev, 0);
3353 priv->irq1 = platform_get_irq(pdev, 1);
3354 priv->wol_irq = platform_get_irq(pdev, 2);
3355 if (!priv->irq0 || !priv->irq1) {
3356 dev_err(&pdev->dev, "can't find IRQs\n");
3362 macaddr = of_get_mac_address(dn);
3364 dev_err(&pdev->dev, "can't find MAC address\n");
3369 macaddr = pd->mac_address;
3372 r = platform_get_resource(pdev, IORESOURCE_MEM, 0);
3373 priv->base = devm_ioremap_resource(&pdev->dev, r);
3374 if (IS_ERR(priv->base)) {
3375 err = PTR_ERR(priv->base);
3379 SET_NETDEV_DEV(dev, &pdev->dev);
3380 dev_set_drvdata(&pdev->dev, dev);
3381 ether_addr_copy(dev->dev_addr, macaddr);
3382 dev->watchdog_timeo = 2 * HZ;
3383 dev->ethtool_ops = &bcmgenet_ethtool_ops;
3384 dev->netdev_ops = &bcmgenet_netdev_ops;
3386 priv->msg_enable = netif_msg_init(-1, GENET_MSG_DEFAULT);
3388 /* Set hardware features */
3389 dev->hw_features |= NETIF_F_SG | NETIF_F_IP_CSUM |
3390 NETIF_F_IPV6_CSUM | NETIF_F_RXCSUM;
3392 /* Request the WOL interrupt and advertise suspend if available */
3393 priv->wol_irq_disabled = true;
3394 err = devm_request_irq(&pdev->dev, priv->wol_irq, bcmgenet_wol_isr, 0,
3397 device_set_wakeup_capable(&pdev->dev, 1);
3399 /* Set the needed headroom to account for any possible
3400 * features enabling/disabling at runtime
3402 dev->needed_headroom += 64;
3404 netdev_boot_setup_check(dev);
3409 priv->version = (enum bcmgenet_version)of_id->data;
3411 priv->version = pd->genet_version;
3413 priv->clk = devm_clk_get(&priv->pdev->dev, "enet");
3414 if (IS_ERR(priv->clk)) {
3415 dev_warn(&priv->pdev->dev, "failed to get enet clock\n");
3419 clk_prepare_enable(priv->clk);
3421 bcmgenet_set_hw_params(priv);
3423 /* Mii wait queue */
3424 init_waitqueue_head(&priv->wq);
3425 /* Always use RX_BUF_LENGTH (2KB) buffer for all chips */
3426 priv->rx_buf_len = RX_BUF_LENGTH;
3427 INIT_WORK(&priv->bcmgenet_irq_work, bcmgenet_irq_task);
3429 priv->clk_wol = devm_clk_get(&priv->pdev->dev, "enet-wol");
3430 if (IS_ERR(priv->clk_wol)) {
3431 dev_warn(&priv->pdev->dev, "failed to get enet-wol clock\n");
3432 priv->clk_wol = NULL;
3435 priv->clk_eee = devm_clk_get(&priv->pdev->dev, "enet-eee");
3436 if (IS_ERR(priv->clk_eee)) {
3437 dev_warn(&priv->pdev->dev, "failed to get enet-eee clock\n");
3438 priv->clk_eee = NULL;
3441 err = reset_umac(priv);
3443 goto err_clk_disable;
3445 err = bcmgenet_mii_init(dev);
3447 goto err_clk_disable;
3449 /* setup number of real queues + 1 (GENET_V1 has 0 hardware queues
3450 * just the ring 16 descriptor based TX
3452 netif_set_real_num_tx_queues(priv->dev, priv->hw_params->tx_queues + 1);
3453 netif_set_real_num_rx_queues(priv->dev, priv->hw_params->rx_queues + 1);
3455 /* libphy will determine the link state */
3456 netif_carrier_off(dev);
3458 /* Turn off the main clock, WOL clock is handled separately */
3459 clk_disable_unprepare(priv->clk);
3461 err = register_netdev(dev);
3468 clk_disable_unprepare(priv->clk);
3474 static int bcmgenet_remove(struct platform_device *pdev)
3476 struct bcmgenet_priv *priv = dev_to_priv(&pdev->dev);
3478 dev_set_drvdata(&pdev->dev, NULL);
3479 unregister_netdev(priv->dev);
3480 bcmgenet_mii_exit(priv->dev);
3481 free_netdev(priv->dev);
3486 #ifdef CONFIG_PM_SLEEP
3487 static int bcmgenet_suspend(struct device *d)
3489 struct net_device *dev = dev_get_drvdata(d);
3490 struct bcmgenet_priv *priv = netdev_priv(dev);
3493 if (!netif_running(dev))
3496 bcmgenet_netif_stop(dev);
3498 phy_suspend(priv->phydev);
3500 netif_device_detach(dev);
3502 /* Disable MAC receive */
3503 umac_enable_set(priv, CMD_RX_EN, false);
3505 ret = bcmgenet_dma_teardown(priv);
3509 /* Disable MAC transmit. TX DMA disabled have to done before this */
3510 umac_enable_set(priv, CMD_TX_EN, false);
3513 bcmgenet_tx_reclaim_all(dev);
3514 bcmgenet_fini_dma(priv);
3516 /* Prepare the device for Wake-on-LAN and switch to the slow clock */
3517 if (device_may_wakeup(d) && priv->wolopts) {
3518 ret = bcmgenet_power_down(priv, GENET_POWER_WOL_MAGIC);
3519 clk_prepare_enable(priv->clk_wol);
3520 } else if (priv->internal_phy) {
3521 ret = bcmgenet_power_down(priv, GENET_POWER_PASSIVE);
3524 /* Turn off the clocks */
3525 clk_disable_unprepare(priv->clk);
3530 static int bcmgenet_resume(struct device *d)
3532 struct net_device *dev = dev_get_drvdata(d);
3533 struct bcmgenet_priv *priv = netdev_priv(dev);
3534 unsigned long dma_ctrl;
3538 if (!netif_running(dev))
3541 /* Turn on the clock */
3542 ret = clk_prepare_enable(priv->clk);
3546 /* If this is an internal GPHY, power it back on now, before UniMAC is
3547 * brought out of reset as absolutely no UniMAC activity is allowed
3549 if (priv->internal_phy)
3550 bcmgenet_power_up(priv, GENET_POWER_PASSIVE);
3552 bcmgenet_umac_reset(priv);
3554 ret = init_umac(priv);
3556 goto out_clk_disable;
3558 /* From WOL-enabled suspend, switch to regular clock */
3560 clk_disable_unprepare(priv->clk_wol);
3562 phy_init_hw(priv->phydev);
3563 /* Speed settings must be restored */
3564 bcmgenet_mii_config(priv->dev);
3566 /* disable ethernet MAC while updating its registers */
3567 umac_enable_set(priv, CMD_TX_EN | CMD_RX_EN, false);
3569 bcmgenet_set_hw_addr(priv, dev->dev_addr);
3571 if (priv->internal_phy) {
3572 reg = bcmgenet_ext_readl(priv, EXT_EXT_PWR_MGMT);
3573 reg |= EXT_ENERGY_DET_MASK;
3574 bcmgenet_ext_writel(priv, reg, EXT_EXT_PWR_MGMT);
3578 bcmgenet_power_up(priv, GENET_POWER_WOL_MAGIC);
3580 /* Disable RX/TX DMA and flush TX queues */
3581 dma_ctrl = bcmgenet_dma_disable(priv);
3583 /* Reinitialize TDMA and RDMA and SW housekeeping */
3584 ret = bcmgenet_init_dma(priv);
3586 netdev_err(dev, "failed to initialize DMA\n");
3587 goto out_clk_disable;
3590 /* Always enable ring 16 - descriptor ring */
3591 bcmgenet_enable_dma(priv, dma_ctrl);
3593 netif_device_attach(dev);
3595 phy_resume(priv->phydev);
3597 if (priv->eee.eee_enabled)
3598 bcmgenet_eee_enable_set(dev, true);
3600 bcmgenet_netif_start(dev);
3605 clk_disable_unprepare(priv->clk);
3608 #endif /* CONFIG_PM_SLEEP */
3610 static SIMPLE_DEV_PM_OPS(bcmgenet_pm_ops, bcmgenet_suspend, bcmgenet_resume);
3612 static struct platform_driver bcmgenet_driver = {
3613 .probe = bcmgenet_probe,
3614 .remove = bcmgenet_remove,
3617 .of_match_table = bcmgenet_match,
3618 .pm = &bcmgenet_pm_ops,
3621 module_platform_driver(bcmgenet_driver);
3623 MODULE_AUTHOR("Broadcom Corporation");
3624 MODULE_DESCRIPTION("Broadcom GENET Ethernet controller driver");
3625 MODULE_ALIAS("platform:bcmgenet");
3626 MODULE_LICENSE("GPL");