1 // SPDX-License-Identifier: GPL-2.0-only
3 * Cadence MACB/GEM Ethernet Controller driver
5 * Copyright (C) 2004-2006 Atmel Corporation
8 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
10 #include <linux/clk-provider.h>
11 #include <linux/crc32.h>
12 #include <linux/module.h>
13 #include <linux/moduleparam.h>
14 #include <linux/kernel.h>
15 #include <linux/types.h>
16 #include <linux/circ_buf.h>
17 #include <linux/slab.h>
18 #include <linux/init.h>
20 #include <linux/gpio.h>
21 #include <linux/gpio/consumer.h>
22 #include <linux/interrupt.h>
23 #include <linux/netdevice.h>
24 #include <linux/etherdevice.h>
25 #include <linux/dma-mapping.h>
26 #include <linux/platform_device.h>
27 #include <linux/phylink.h>
29 #include <linux/of_device.h>
30 #include <linux/of_gpio.h>
31 #include <linux/of_mdio.h>
32 #include <linux/of_net.h>
34 #include <linux/udp.h>
35 #include <linux/tcp.h>
36 #include <linux/iopoll.h>
37 #include <linux/pm_runtime.h>
40 /* This structure is only used for MACB on SiFive FU540 devices */
41 struct sifive_fu540_macb_mgmt {
47 #define MACB_RX_BUFFER_SIZE 128
48 #define RX_BUFFER_MULTIPLE 64 /* bytes */
50 #define DEFAULT_RX_RING_SIZE 512 /* must be power of 2 */
51 #define MIN_RX_RING_SIZE 64
52 #define MAX_RX_RING_SIZE 8192
53 #define RX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \
56 #define DEFAULT_TX_RING_SIZE 512 /* must be power of 2 */
57 #define MIN_TX_RING_SIZE 64
58 #define MAX_TX_RING_SIZE 4096
59 #define TX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \
62 /* level of occupied TX descriptors under which we wake up TX process */
63 #define MACB_TX_WAKEUP_THRESH(bp) (3 * (bp)->tx_ring_size / 4)
65 #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(ISR_ROVR))
66 #define MACB_TX_ERR_FLAGS (MACB_BIT(ISR_TUND) \
69 #define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP) \
72 /* Max length of transmit frame must be a multiple of 8 bytes */
73 #define MACB_TX_LEN_ALIGN 8
74 #define MACB_MAX_TX_LEN ((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1) & ~((unsigned int)(MACB_TX_LEN_ALIGN - 1)))
75 /* Limit maximum TX length as per Cadence TSO errata. This is to avoid a
76 * false amba_error in TX path from the DMA assuming there is not enough
77 * space in the SRAM (16KB) even when there is.
79 #define GEM_MAX_TX_LEN (unsigned int)(0x3FC0)
81 #define GEM_MTU_MIN_SIZE ETH_MIN_MTU
82 #define MACB_NETIF_LSO NETIF_F_TSO
84 #define MACB_WOL_HAS_MAGIC_PACKET (0x1 << 0)
85 #define MACB_WOL_ENABLED (0x1 << 1)
87 #define HS_SPEED_10000M 4
88 #define MACB_SERDES_RATE_10G 1
90 /* Graceful stop timeouts in us. We should allow up to
91 * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions)
93 #define MACB_HALT_TIMEOUT 1230
95 #define MACB_PM_TIMEOUT 100 /* ms */
97 #define MACB_MDIO_TIMEOUT 1000000 /* in usecs */
99 /* DMA buffer descriptor might be different size
100 * depends on hardware configuration:
102 * 1. dma address width 32 bits:
103 * word 1: 32 bit address of Data Buffer
106 * 2. dma address width 64 bits:
107 * word 1: 32 bit address of Data Buffer
109 * word 3: upper 32 bit address of Data Buffer
112 * 3. dma address width 32 bits with hardware timestamping:
113 * word 1: 32 bit address of Data Buffer
115 * word 3: timestamp word 1
116 * word 4: timestamp word 2
118 * 4. dma address width 64 bits with hardware timestamping:
119 * word 1: 32 bit address of Data Buffer
121 * word 3: upper 32 bit address of Data Buffer
123 * word 5: timestamp word 1
124 * word 6: timestamp word 2
126 static unsigned int macb_dma_desc_get_size(struct macb *bp)
129 unsigned int desc_size;
131 switch (bp->hw_dma_cap) {
133 desc_size = sizeof(struct macb_dma_desc)
134 + sizeof(struct macb_dma_desc_64);
137 desc_size = sizeof(struct macb_dma_desc)
138 + sizeof(struct macb_dma_desc_ptp);
140 case HW_DMA_CAP_64B_PTP:
141 desc_size = sizeof(struct macb_dma_desc)
142 + sizeof(struct macb_dma_desc_64)
143 + sizeof(struct macb_dma_desc_ptp);
146 desc_size = sizeof(struct macb_dma_desc);
150 return sizeof(struct macb_dma_desc);
153 static unsigned int macb_adj_dma_desc_idx(struct macb *bp, unsigned int desc_idx)
156 switch (bp->hw_dma_cap) {
161 case HW_DMA_CAP_64B_PTP:
171 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
172 static struct macb_dma_desc_64 *macb_64b_desc(struct macb *bp, struct macb_dma_desc *desc)
174 return (struct macb_dma_desc_64 *)((void *)desc
175 + sizeof(struct macb_dma_desc));
179 /* Ring buffer accessors */
180 static unsigned int macb_tx_ring_wrap(struct macb *bp, unsigned int index)
182 return index & (bp->tx_ring_size - 1);
185 static struct macb_dma_desc *macb_tx_desc(struct macb_queue *queue,
188 index = macb_tx_ring_wrap(queue->bp, index);
189 index = macb_adj_dma_desc_idx(queue->bp, index);
190 return &queue->tx_ring[index];
193 static struct macb_tx_skb *macb_tx_skb(struct macb_queue *queue,
196 return &queue->tx_skb[macb_tx_ring_wrap(queue->bp, index)];
199 static dma_addr_t macb_tx_dma(struct macb_queue *queue, unsigned int index)
203 offset = macb_tx_ring_wrap(queue->bp, index) *
204 macb_dma_desc_get_size(queue->bp);
206 return queue->tx_ring_dma + offset;
209 static unsigned int macb_rx_ring_wrap(struct macb *bp, unsigned int index)
211 return index & (bp->rx_ring_size - 1);
214 static struct macb_dma_desc *macb_rx_desc(struct macb_queue *queue, unsigned int index)
216 index = macb_rx_ring_wrap(queue->bp, index);
217 index = macb_adj_dma_desc_idx(queue->bp, index);
218 return &queue->rx_ring[index];
221 static void *macb_rx_buffer(struct macb_queue *queue, unsigned int index)
223 return queue->rx_buffers + queue->bp->rx_buffer_size *
224 macb_rx_ring_wrap(queue->bp, index);
228 static u32 hw_readl_native(struct macb *bp, int offset)
230 return __raw_readl(bp->regs + offset);
233 static void hw_writel_native(struct macb *bp, int offset, u32 value)
235 __raw_writel(value, bp->regs + offset);
238 static u32 hw_readl(struct macb *bp, int offset)
240 return readl_relaxed(bp->regs + offset);
243 static void hw_writel(struct macb *bp, int offset, u32 value)
245 writel_relaxed(value, bp->regs + offset);
248 /* Find the CPU endianness by using the loopback bit of NCR register. When the
249 * CPU is in big endian we need to program swapped mode for management
252 static bool hw_is_native_io(void __iomem *addr)
254 u32 value = MACB_BIT(LLB);
256 __raw_writel(value, addr + MACB_NCR);
257 value = __raw_readl(addr + MACB_NCR);
259 /* Write 0 back to disable everything */
260 __raw_writel(0, addr + MACB_NCR);
262 return value == MACB_BIT(LLB);
265 static bool hw_is_gem(void __iomem *addr, bool native_io)
270 id = __raw_readl(addr + MACB_MID);
272 id = readl_relaxed(addr + MACB_MID);
274 return MACB_BFEXT(IDNUM, id) >= 0x2;
277 static void macb_set_hwaddr(struct macb *bp)
282 bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr));
283 macb_or_gem_writel(bp, SA1B, bottom);
284 top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
285 macb_or_gem_writel(bp, SA1T, top);
287 /* Clear unused address register sets */
288 macb_or_gem_writel(bp, SA2B, 0);
289 macb_or_gem_writel(bp, SA2T, 0);
290 macb_or_gem_writel(bp, SA3B, 0);
291 macb_or_gem_writel(bp, SA3T, 0);
292 macb_or_gem_writel(bp, SA4B, 0);
293 macb_or_gem_writel(bp, SA4T, 0);
296 static void macb_get_hwaddr(struct macb *bp)
303 /* Check all 4 address register for valid address */
304 for (i = 0; i < 4; i++) {
305 bottom = macb_or_gem_readl(bp, SA1B + i * 8);
306 top = macb_or_gem_readl(bp, SA1T + i * 8);
308 addr[0] = bottom & 0xff;
309 addr[1] = (bottom >> 8) & 0xff;
310 addr[2] = (bottom >> 16) & 0xff;
311 addr[3] = (bottom >> 24) & 0xff;
312 addr[4] = top & 0xff;
313 addr[5] = (top >> 8) & 0xff;
315 if (is_valid_ether_addr(addr)) {
316 eth_hw_addr_set(bp->dev, addr);
321 dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
322 eth_hw_addr_random(bp->dev);
325 static int macb_mdio_wait_for_idle(struct macb *bp)
329 return readx_poll_timeout(MACB_READ_NSR, bp, val, val & MACB_BIT(IDLE),
330 1, MACB_MDIO_TIMEOUT);
333 static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
335 struct macb *bp = bus->priv;
338 status = pm_runtime_get_sync(&bp->pdev->dev);
340 pm_runtime_put_noidle(&bp->pdev->dev);
344 status = macb_mdio_wait_for_idle(bp);
348 if (regnum & MII_ADDR_C45) {
349 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
350 | MACB_BF(RW, MACB_MAN_C45_ADDR)
351 | MACB_BF(PHYA, mii_id)
352 | MACB_BF(REGA, (regnum >> 16) & 0x1F)
353 | MACB_BF(DATA, regnum & 0xFFFF)
354 | MACB_BF(CODE, MACB_MAN_C45_CODE)));
356 status = macb_mdio_wait_for_idle(bp);
360 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
361 | MACB_BF(RW, MACB_MAN_C45_READ)
362 | MACB_BF(PHYA, mii_id)
363 | MACB_BF(REGA, (regnum >> 16) & 0x1F)
364 | MACB_BF(CODE, MACB_MAN_C45_CODE)));
366 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF)
367 | MACB_BF(RW, MACB_MAN_C22_READ)
368 | MACB_BF(PHYA, mii_id)
369 | MACB_BF(REGA, regnum)
370 | MACB_BF(CODE, MACB_MAN_C22_CODE)));
373 status = macb_mdio_wait_for_idle(bp);
377 status = MACB_BFEXT(DATA, macb_readl(bp, MAN));
380 pm_runtime_mark_last_busy(&bp->pdev->dev);
381 pm_runtime_put_autosuspend(&bp->pdev->dev);
386 static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
389 struct macb *bp = bus->priv;
392 status = pm_runtime_get_sync(&bp->pdev->dev);
394 pm_runtime_put_noidle(&bp->pdev->dev);
398 status = macb_mdio_wait_for_idle(bp);
400 goto mdio_write_exit;
402 if (regnum & MII_ADDR_C45) {
403 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
404 | MACB_BF(RW, MACB_MAN_C45_ADDR)
405 | MACB_BF(PHYA, mii_id)
406 | MACB_BF(REGA, (regnum >> 16) & 0x1F)
407 | MACB_BF(DATA, regnum & 0xFFFF)
408 | MACB_BF(CODE, MACB_MAN_C45_CODE)));
410 status = macb_mdio_wait_for_idle(bp);
412 goto mdio_write_exit;
414 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
415 | MACB_BF(RW, MACB_MAN_C45_WRITE)
416 | MACB_BF(PHYA, mii_id)
417 | MACB_BF(REGA, (regnum >> 16) & 0x1F)
418 | MACB_BF(CODE, MACB_MAN_C45_CODE)
419 | MACB_BF(DATA, value)));
421 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF)
422 | MACB_BF(RW, MACB_MAN_C22_WRITE)
423 | MACB_BF(PHYA, mii_id)
424 | MACB_BF(REGA, regnum)
425 | MACB_BF(CODE, MACB_MAN_C22_CODE)
426 | MACB_BF(DATA, value)));
429 status = macb_mdio_wait_for_idle(bp);
431 goto mdio_write_exit;
434 pm_runtime_mark_last_busy(&bp->pdev->dev);
435 pm_runtime_put_autosuspend(&bp->pdev->dev);
440 static void macb_init_buffers(struct macb *bp)
442 struct macb_queue *queue;
445 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
446 queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
447 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
448 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
449 queue_writel(queue, RBQPH,
450 upper_32_bits(queue->rx_ring_dma));
452 queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
453 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
454 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
455 queue_writel(queue, TBQPH,
456 upper_32_bits(queue->tx_ring_dma));
462 * macb_set_tx_clk() - Set a clock to a new frequency
463 * @bp: pointer to struct macb
464 * @speed: New frequency in Hz
466 static void macb_set_tx_clk(struct macb *bp, int speed)
468 long ferr, rate, rate_rounded;
470 if (!bp->tx_clk || (bp->caps & MACB_CAPS_CLK_HW_CHG))
473 /* In case of MII the PHY is the clock master */
474 if (bp->phy_interface == PHY_INTERFACE_MODE_MII)
491 rate_rounded = clk_round_rate(bp->tx_clk, rate);
492 if (rate_rounded < 0)
495 /* RGMII allows 50 ppm frequency error. Test and warn if this limit
498 ferr = abs(rate_rounded - rate);
499 ferr = DIV_ROUND_UP(ferr, rate / 100000);
502 "unable to generate target frequency: %ld Hz\n",
505 if (clk_set_rate(bp->tx_clk, rate_rounded))
506 netdev_err(bp->dev, "adjusting tx_clk failed.\n");
509 static void macb_validate(struct phylink_config *config,
510 unsigned long *supported,
511 struct phylink_link_state *state)
513 struct net_device *ndev = to_net_dev(config->dev);
514 __ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
515 struct macb *bp = netdev_priv(ndev);
517 /* We only support MII, RMII, GMII, RGMII & SGMII. */
518 if (state->interface != PHY_INTERFACE_MODE_NA &&
519 state->interface != PHY_INTERFACE_MODE_MII &&
520 state->interface != PHY_INTERFACE_MODE_RMII &&
521 state->interface != PHY_INTERFACE_MODE_GMII &&
522 state->interface != PHY_INTERFACE_MODE_SGMII &&
523 state->interface != PHY_INTERFACE_MODE_10GBASER &&
524 !phy_interface_mode_is_rgmii(state->interface)) {
525 linkmode_zero(supported);
529 if (!macb_is_gem(bp) &&
530 (state->interface == PHY_INTERFACE_MODE_GMII ||
531 phy_interface_mode_is_rgmii(state->interface))) {
532 linkmode_zero(supported);
536 if (state->interface == PHY_INTERFACE_MODE_10GBASER &&
537 !(bp->caps & MACB_CAPS_HIGH_SPEED &&
538 bp->caps & MACB_CAPS_PCS)) {
539 linkmode_zero(supported);
543 phylink_set_port_modes(mask);
544 phylink_set(mask, Autoneg);
545 phylink_set(mask, Asym_Pause);
547 if (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE &&
548 (state->interface == PHY_INTERFACE_MODE_NA ||
549 state->interface == PHY_INTERFACE_MODE_10GBASER)) {
550 phylink_set_10g_modes(mask);
551 phylink_set(mask, 10000baseKR_Full);
552 if (state->interface != PHY_INTERFACE_MODE_NA)
556 phylink_set(mask, 10baseT_Half);
557 phylink_set(mask, 10baseT_Full);
558 phylink_set(mask, 100baseT_Half);
559 phylink_set(mask, 100baseT_Full);
561 if (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE &&
562 (state->interface == PHY_INTERFACE_MODE_NA ||
563 state->interface == PHY_INTERFACE_MODE_GMII ||
564 state->interface == PHY_INTERFACE_MODE_SGMII ||
565 phy_interface_mode_is_rgmii(state->interface))) {
566 phylink_set(mask, 1000baseT_Full);
567 phylink_set(mask, 1000baseX_Full);
569 if (!(bp->caps & MACB_CAPS_NO_GIGABIT_HALF))
570 phylink_set(mask, 1000baseT_Half);
573 linkmode_and(supported, supported, mask);
574 linkmode_and(state->advertising, state->advertising, mask);
577 static void macb_usx_pcs_link_up(struct phylink_pcs *pcs, unsigned int mode,
578 phy_interface_t interface, int speed,
581 struct macb *bp = container_of(pcs, struct macb, phylink_pcs);
584 config = gem_readl(bp, USX_CONTROL);
585 config = GEM_BFINS(SERDES_RATE, MACB_SERDES_RATE_10G, config);
586 config = GEM_BFINS(USX_CTRL_SPEED, HS_SPEED_10000M, config);
587 config &= ~(GEM_BIT(TX_SCR_BYPASS) | GEM_BIT(RX_SCR_BYPASS));
588 config |= GEM_BIT(TX_EN);
589 gem_writel(bp, USX_CONTROL, config);
592 static void macb_usx_pcs_get_state(struct phylink_pcs *pcs,
593 struct phylink_link_state *state)
595 struct macb *bp = container_of(pcs, struct macb, phylink_pcs);
598 state->speed = SPEED_10000;
600 state->an_complete = 1;
602 val = gem_readl(bp, USX_STATUS);
603 state->link = !!(val & GEM_BIT(USX_BLOCK_LOCK));
604 val = gem_readl(bp, NCFGR);
605 if (val & GEM_BIT(PAE))
606 state->pause = MLO_PAUSE_RX;
609 static int macb_usx_pcs_config(struct phylink_pcs *pcs,
611 phy_interface_t interface,
612 const unsigned long *advertising,
613 bool permit_pause_to_mac)
615 struct macb *bp = container_of(pcs, struct macb, phylink_pcs);
617 gem_writel(bp, USX_CONTROL, gem_readl(bp, USX_CONTROL) |
623 static void macb_pcs_get_state(struct phylink_pcs *pcs,
624 struct phylink_link_state *state)
629 static void macb_pcs_an_restart(struct phylink_pcs *pcs)
634 static int macb_pcs_config(struct phylink_pcs *pcs,
636 phy_interface_t interface,
637 const unsigned long *advertising,
638 bool permit_pause_to_mac)
643 static const struct phylink_pcs_ops macb_phylink_usx_pcs_ops = {
644 .pcs_get_state = macb_usx_pcs_get_state,
645 .pcs_config = macb_usx_pcs_config,
646 .pcs_link_up = macb_usx_pcs_link_up,
649 static const struct phylink_pcs_ops macb_phylink_pcs_ops = {
650 .pcs_get_state = macb_pcs_get_state,
651 .pcs_an_restart = macb_pcs_an_restart,
652 .pcs_config = macb_pcs_config,
655 static void macb_mac_config(struct phylink_config *config, unsigned int mode,
656 const struct phylink_link_state *state)
658 struct net_device *ndev = to_net_dev(config->dev);
659 struct macb *bp = netdev_priv(ndev);
664 spin_lock_irqsave(&bp->lock, flags);
666 old_ctrl = ctrl = macb_or_gem_readl(bp, NCFGR);
667 old_ncr = ncr = macb_or_gem_readl(bp, NCR);
669 if (bp->caps & MACB_CAPS_MACB_IS_EMAC) {
670 if (state->interface == PHY_INTERFACE_MODE_RMII)
671 ctrl |= MACB_BIT(RM9200_RMII);
672 } else if (macb_is_gem(bp)) {
673 ctrl &= ~(GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL));
674 ncr &= ~GEM_BIT(ENABLE_HS_MAC);
676 if (state->interface == PHY_INTERFACE_MODE_SGMII) {
677 ctrl |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
678 } else if (state->interface == PHY_INTERFACE_MODE_10GBASER) {
679 ctrl |= GEM_BIT(PCSSEL);
680 ncr |= GEM_BIT(ENABLE_HS_MAC);
681 } else if (bp->caps & MACB_CAPS_MIIONRGMII &&
682 bp->phy_interface == PHY_INTERFACE_MODE_MII) {
683 ncr |= MACB_BIT(MIIONRGMII);
687 /* Apply the new configuration, if any */
689 macb_or_gem_writel(bp, NCFGR, ctrl);
692 macb_or_gem_writel(bp, NCR, ncr);
694 /* Disable AN for SGMII fixed link configuration, enable otherwise.
695 * Must be written after PCSSEL is set in NCFGR,
696 * otherwise writes will not take effect.
698 if (macb_is_gem(bp) && state->interface == PHY_INTERFACE_MODE_SGMII) {
699 u32 pcsctrl, old_pcsctrl;
701 old_pcsctrl = gem_readl(bp, PCSCNTRL);
702 if (mode == MLO_AN_FIXED)
703 pcsctrl = old_pcsctrl & ~GEM_BIT(PCSAUTONEG);
705 pcsctrl = old_pcsctrl | GEM_BIT(PCSAUTONEG);
706 if (old_pcsctrl != pcsctrl)
707 gem_writel(bp, PCSCNTRL, pcsctrl);
710 spin_unlock_irqrestore(&bp->lock, flags);
713 static void macb_mac_link_down(struct phylink_config *config, unsigned int mode,
714 phy_interface_t interface)
716 struct net_device *ndev = to_net_dev(config->dev);
717 struct macb *bp = netdev_priv(ndev);
718 struct macb_queue *queue;
722 if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC))
723 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
724 queue_writel(queue, IDR,
725 bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP));
727 /* Disable Rx and Tx */
728 ctrl = macb_readl(bp, NCR) & ~(MACB_BIT(RE) | MACB_BIT(TE));
729 macb_writel(bp, NCR, ctrl);
731 netif_tx_stop_all_queues(ndev);
734 static void macb_mac_link_up(struct phylink_config *config,
735 struct phy_device *phy,
736 unsigned int mode, phy_interface_t interface,
737 int speed, int duplex,
738 bool tx_pause, bool rx_pause)
740 struct net_device *ndev = to_net_dev(config->dev);
741 struct macb *bp = netdev_priv(ndev);
742 struct macb_queue *queue;
747 spin_lock_irqsave(&bp->lock, flags);
749 ctrl = macb_or_gem_readl(bp, NCFGR);
751 ctrl &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
753 if (speed == SPEED_100)
754 ctrl |= MACB_BIT(SPD);
757 ctrl |= MACB_BIT(FD);
759 if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC)) {
760 ctrl &= ~MACB_BIT(PAE);
761 if (macb_is_gem(bp)) {
762 ctrl &= ~GEM_BIT(GBE);
764 if (speed == SPEED_1000)
765 ctrl |= GEM_BIT(GBE);
769 ctrl |= MACB_BIT(PAE);
771 macb_set_tx_clk(bp, speed);
773 /* Initialize rings & buffers as clearing MACB_BIT(TE) in link down
774 * cleared the pipeline and control registers.
776 bp->macbgem_ops.mog_init_rings(bp);
777 macb_init_buffers(bp);
779 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
780 queue_writel(queue, IER,
781 bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP));
784 macb_or_gem_writel(bp, NCFGR, ctrl);
786 if (bp->phy_interface == PHY_INTERFACE_MODE_10GBASER)
787 gem_writel(bp, HS_MAC_CONFIG, GEM_BFINS(HS_MAC_SPEED, HS_SPEED_10000M,
788 gem_readl(bp, HS_MAC_CONFIG)));
790 spin_unlock_irqrestore(&bp->lock, flags);
792 /* Enable Rx and Tx */
793 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(RE) | MACB_BIT(TE));
795 netif_tx_wake_all_queues(ndev);
798 static int macb_mac_prepare(struct phylink_config *config, unsigned int mode,
799 phy_interface_t interface)
801 struct net_device *ndev = to_net_dev(config->dev);
802 struct macb *bp = netdev_priv(ndev);
804 if (interface == PHY_INTERFACE_MODE_10GBASER)
805 bp->phylink_pcs.ops = &macb_phylink_usx_pcs_ops;
806 else if (interface == PHY_INTERFACE_MODE_SGMII)
807 bp->phylink_pcs.ops = &macb_phylink_pcs_ops;
809 bp->phylink_pcs.ops = NULL;
811 if (bp->phylink_pcs.ops)
812 phylink_set_pcs(bp->phylink, &bp->phylink_pcs);
817 static const struct phylink_mac_ops macb_phylink_ops = {
818 .validate = macb_validate,
819 .mac_prepare = macb_mac_prepare,
820 .mac_config = macb_mac_config,
821 .mac_link_down = macb_mac_link_down,
822 .mac_link_up = macb_mac_link_up,
825 static bool macb_phy_handle_exists(struct device_node *dn)
827 dn = of_parse_phandle(dn, "phy-handle", 0);
832 static int macb_phylink_connect(struct macb *bp)
834 struct device_node *dn = bp->pdev->dev.of_node;
835 struct net_device *dev = bp->dev;
836 struct phy_device *phydev;
840 ret = phylink_of_phy_connect(bp->phylink, dn, 0);
842 if (!dn || (ret && !macb_phy_handle_exists(dn))) {
843 phydev = phy_find_first(bp->mii_bus);
845 netdev_err(dev, "no PHY found\n");
849 /* attach the mac to the phy */
850 ret = phylink_connect_phy(bp->phylink, phydev);
854 netdev_err(dev, "Could not attach PHY (%d)\n", ret);
858 phylink_start(bp->phylink);
863 static void macb_get_pcs_fixed_state(struct phylink_config *config,
864 struct phylink_link_state *state)
866 struct net_device *ndev = to_net_dev(config->dev);
867 struct macb *bp = netdev_priv(ndev);
869 state->link = (macb_readl(bp, NSR) & MACB_BIT(NSR_LINK)) != 0;
872 /* based on au1000_eth. c*/
873 static int macb_mii_probe(struct net_device *dev)
875 struct macb *bp = netdev_priv(dev);
877 bp->phylink_config.dev = &dev->dev;
878 bp->phylink_config.type = PHYLINK_NETDEV;
880 if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) {
881 bp->phylink_config.poll_fixed_state = true;
882 bp->phylink_config.get_fixed_state = macb_get_pcs_fixed_state;
885 bp->phylink = phylink_create(&bp->phylink_config, bp->pdev->dev.fwnode,
886 bp->phy_interface, &macb_phylink_ops);
887 if (IS_ERR(bp->phylink)) {
888 netdev_err(dev, "Could not create a phylink instance (%ld)\n",
889 PTR_ERR(bp->phylink));
890 return PTR_ERR(bp->phylink);
896 static int macb_mdiobus_register(struct macb *bp)
898 struct device_node *child, *np = bp->pdev->dev.of_node;
900 /* If we have a child named mdio, probe it instead of looking for PHYs
901 * directly under the MAC node
903 child = of_get_child_by_name(np, "mdio");
905 int ret = of_mdiobus_register(bp->mii_bus, child);
911 if (of_phy_is_fixed_link(np))
912 return mdiobus_register(bp->mii_bus);
914 /* Only create the PHY from the device tree if at least one PHY is
915 * described. Otherwise scan the entire MDIO bus. We do this to support
916 * old device tree that did not follow the best practices and did not
917 * describe their network PHYs.
919 for_each_available_child_of_node(np, child)
920 if (of_mdiobus_child_is_phy(child)) {
921 /* The loop increments the child refcount,
922 * decrement it before returning.
926 return of_mdiobus_register(bp->mii_bus, np);
929 return mdiobus_register(bp->mii_bus);
932 static int macb_mii_init(struct macb *bp)
936 /* Enable management port */
937 macb_writel(bp, NCR, MACB_BIT(MPE));
939 bp->mii_bus = mdiobus_alloc();
945 bp->mii_bus->name = "MACB_mii_bus";
946 bp->mii_bus->read = &macb_mdio_read;
947 bp->mii_bus->write = &macb_mdio_write;
948 snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
949 bp->pdev->name, bp->pdev->id);
950 bp->mii_bus->priv = bp;
951 bp->mii_bus->parent = &bp->pdev->dev;
953 dev_set_drvdata(&bp->dev->dev, bp->mii_bus);
955 err = macb_mdiobus_register(bp);
957 goto err_out_free_mdiobus;
959 err = macb_mii_probe(bp->dev);
961 goto err_out_unregister_bus;
965 err_out_unregister_bus:
966 mdiobus_unregister(bp->mii_bus);
967 err_out_free_mdiobus:
968 mdiobus_free(bp->mii_bus);
973 static void macb_update_stats(struct macb *bp)
975 u32 *p = &bp->hw_stats.macb.rx_pause_frames;
976 u32 *end = &bp->hw_stats.macb.tx_pause_frames + 1;
977 int offset = MACB_PFR;
979 WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
981 for (; p < end; p++, offset += 4)
982 *p += bp->macb_reg_readl(bp, offset);
985 static int macb_halt_tx(struct macb *bp)
987 unsigned long halt_time, timeout;
990 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(THALT));
992 timeout = jiffies + usecs_to_jiffies(MACB_HALT_TIMEOUT);
995 status = macb_readl(bp, TSR);
996 if (!(status & MACB_BIT(TGO)))
1000 } while (time_before(halt_time, timeout));
1005 static void macb_tx_unmap(struct macb *bp, struct macb_tx_skb *tx_skb)
1007 if (tx_skb->mapping) {
1008 if (tx_skb->mapped_as_page)
1009 dma_unmap_page(&bp->pdev->dev, tx_skb->mapping,
1010 tx_skb->size, DMA_TO_DEVICE);
1012 dma_unmap_single(&bp->pdev->dev, tx_skb->mapping,
1013 tx_skb->size, DMA_TO_DEVICE);
1014 tx_skb->mapping = 0;
1018 dev_kfree_skb_any(tx_skb->skb);
1023 static void macb_set_addr(struct macb *bp, struct macb_dma_desc *desc, dma_addr_t addr)
1025 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
1026 struct macb_dma_desc_64 *desc_64;
1028 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
1029 desc_64 = macb_64b_desc(bp, desc);
1030 desc_64->addrh = upper_32_bits(addr);
1031 /* The low bits of RX address contain the RX_USED bit, clearing
1032 * of which allows packet RX. Make sure the high bits are also
1033 * visible to HW at that point.
1038 desc->addr = lower_32_bits(addr);
1041 static dma_addr_t macb_get_addr(struct macb *bp, struct macb_dma_desc *desc)
1043 dma_addr_t addr = 0;
1044 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
1045 struct macb_dma_desc_64 *desc_64;
1047 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
1048 desc_64 = macb_64b_desc(bp, desc);
1049 addr = ((u64)(desc_64->addrh) << 32);
1052 addr |= MACB_BF(RX_WADDR, MACB_BFEXT(RX_WADDR, desc->addr));
1056 static void macb_tx_error_task(struct work_struct *work)
1058 struct macb_queue *queue = container_of(work, struct macb_queue,
1060 struct macb *bp = queue->bp;
1061 struct macb_tx_skb *tx_skb;
1062 struct macb_dma_desc *desc;
1063 struct sk_buff *skb;
1065 unsigned long flags;
1067 netdev_vdbg(bp->dev, "macb_tx_error_task: q = %u, t = %u, h = %u\n",
1068 (unsigned int)(queue - bp->queues),
1069 queue->tx_tail, queue->tx_head);
1071 /* Prevent the queue IRQ handlers from running: each of them may call
1072 * macb_tx_interrupt(), which in turn may call netif_wake_subqueue().
1073 * As explained below, we have to halt the transmission before updating
1074 * TBQP registers so we call netif_tx_stop_all_queues() to notify the
1075 * network engine about the macb/gem being halted.
1077 spin_lock_irqsave(&bp->lock, flags);
1079 /* Make sure nobody is trying to queue up new packets */
1080 netif_tx_stop_all_queues(bp->dev);
1082 /* Stop transmission now
1083 * (in case we have just queued new packets)
1084 * macb/gem must be halted to write TBQP register
1086 if (macb_halt_tx(bp))
1087 /* Just complain for now, reinitializing TX path can be good */
1088 netdev_err(bp->dev, "BUG: halt tx timed out\n");
1090 /* Treat frames in TX queue including the ones that caused the error.
1091 * Free transmit buffers in upper layer.
1093 for (tail = queue->tx_tail; tail != queue->tx_head; tail++) {
1096 desc = macb_tx_desc(queue, tail);
1098 tx_skb = macb_tx_skb(queue, tail);
1101 if (ctrl & MACB_BIT(TX_USED)) {
1102 /* skb is set for the last buffer of the frame */
1104 macb_tx_unmap(bp, tx_skb);
1106 tx_skb = macb_tx_skb(queue, tail);
1110 /* ctrl still refers to the first buffer descriptor
1111 * since it's the only one written back by the hardware
1113 if (!(ctrl & MACB_BIT(TX_BUF_EXHAUSTED))) {
1114 netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n",
1115 macb_tx_ring_wrap(bp, tail),
1117 bp->dev->stats.tx_packets++;
1118 queue->stats.tx_packets++;
1119 bp->dev->stats.tx_bytes += skb->len;
1120 queue->stats.tx_bytes += skb->len;
1123 /* "Buffers exhausted mid-frame" errors may only happen
1124 * if the driver is buggy, so complain loudly about
1125 * those. Statistics are updated by hardware.
1127 if (ctrl & MACB_BIT(TX_BUF_EXHAUSTED))
1129 "BUG: TX buffers exhausted mid-frame\n");
1131 desc->ctrl = ctrl | MACB_BIT(TX_USED);
1134 macb_tx_unmap(bp, tx_skb);
1137 /* Set end of TX queue */
1138 desc = macb_tx_desc(queue, 0);
1139 macb_set_addr(bp, desc, 0);
1140 desc->ctrl = MACB_BIT(TX_USED);
1142 /* Make descriptor updates visible to hardware */
1145 /* Reinitialize the TX desc queue */
1146 queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
1147 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
1148 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
1149 queue_writel(queue, TBQPH, upper_32_bits(queue->tx_ring_dma));
1151 /* Make TX ring reflect state of hardware */
1155 /* Housework before enabling TX IRQ */
1156 macb_writel(bp, TSR, macb_readl(bp, TSR));
1157 queue_writel(queue, IER, MACB_TX_INT_FLAGS);
1159 /* Now we are ready to start transmission again */
1160 netif_tx_start_all_queues(bp->dev);
1161 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
1163 spin_unlock_irqrestore(&bp->lock, flags);
1166 static void macb_tx_interrupt(struct macb_queue *queue)
1171 struct macb *bp = queue->bp;
1172 u16 queue_index = queue - bp->queues;
1174 status = macb_readl(bp, TSR);
1175 macb_writel(bp, TSR, status);
1177 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1178 queue_writel(queue, ISR, MACB_BIT(TCOMP));
1180 netdev_vdbg(bp->dev, "macb_tx_interrupt status = 0x%03lx\n",
1181 (unsigned long)status);
1183 head = queue->tx_head;
1184 for (tail = queue->tx_tail; tail != head; tail++) {
1185 struct macb_tx_skb *tx_skb;
1186 struct sk_buff *skb;
1187 struct macb_dma_desc *desc;
1190 desc = macb_tx_desc(queue, tail);
1192 /* Make hw descriptor updates visible to CPU */
1197 /* TX_USED bit is only set by hardware on the very first buffer
1198 * descriptor of the transmitted frame.
1200 if (!(ctrl & MACB_BIT(TX_USED)))
1203 /* Process all buffers of the current transmitted frame */
1205 tx_skb = macb_tx_skb(queue, tail);
1208 /* First, update TX stats if needed */
1210 if (unlikely(skb_shinfo(skb)->tx_flags &
1212 gem_ptp_do_txstamp(queue, skb, desc) == 0) {
1213 /* skb now belongs to timestamp buffer
1214 * and will be removed later
1218 netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n",
1219 macb_tx_ring_wrap(bp, tail),
1221 bp->dev->stats.tx_packets++;
1222 queue->stats.tx_packets++;
1223 bp->dev->stats.tx_bytes += skb->len;
1224 queue->stats.tx_bytes += skb->len;
1227 /* Now we can safely release resources */
1228 macb_tx_unmap(bp, tx_skb);
1230 /* skb is set only for the last buffer of the frame.
1231 * WARNING: at this point skb has been freed by
1239 queue->tx_tail = tail;
1240 if (__netif_subqueue_stopped(bp->dev, queue_index) &&
1241 CIRC_CNT(queue->tx_head, queue->tx_tail,
1242 bp->tx_ring_size) <= MACB_TX_WAKEUP_THRESH(bp))
1243 netif_wake_subqueue(bp->dev, queue_index);
1246 static void gem_rx_refill(struct macb_queue *queue)
1249 struct sk_buff *skb;
1251 struct macb *bp = queue->bp;
1252 struct macb_dma_desc *desc;
1254 while (CIRC_SPACE(queue->rx_prepared_head, queue->rx_tail,
1255 bp->rx_ring_size) > 0) {
1256 entry = macb_rx_ring_wrap(bp, queue->rx_prepared_head);
1258 /* Make hw descriptor updates visible to CPU */
1261 queue->rx_prepared_head++;
1262 desc = macb_rx_desc(queue, entry);
1264 if (!queue->rx_skbuff[entry]) {
1265 /* allocate sk_buff for this free entry in ring */
1266 skb = netdev_alloc_skb(bp->dev, bp->rx_buffer_size);
1267 if (unlikely(!skb)) {
1269 "Unable to allocate sk_buff\n");
1273 /* now fill corresponding descriptor entry */
1274 paddr = dma_map_single(&bp->pdev->dev, skb->data,
1277 if (dma_mapping_error(&bp->pdev->dev, paddr)) {
1282 queue->rx_skbuff[entry] = skb;
1284 if (entry == bp->rx_ring_size - 1)
1285 paddr |= MACB_BIT(RX_WRAP);
1287 /* Setting addr clears RX_USED and allows reception,
1288 * make sure ctrl is cleared first to avoid a race.
1291 macb_set_addr(bp, desc, paddr);
1293 /* properly align Ethernet header */
1294 skb_reserve(skb, NET_IP_ALIGN);
1298 desc->addr &= ~MACB_BIT(RX_USED);
1302 /* Make descriptor updates visible to hardware */
1305 netdev_vdbg(bp->dev, "rx ring: queue: %p, prepared head %d, tail %d\n",
1306 queue, queue->rx_prepared_head, queue->rx_tail);
1309 /* Mark DMA descriptors from begin up to and not including end as unused */
1310 static void discard_partial_frame(struct macb_queue *queue, unsigned int begin,
1315 for (frag = begin; frag != end; frag++) {
1316 struct macb_dma_desc *desc = macb_rx_desc(queue, frag);
1318 desc->addr &= ~MACB_BIT(RX_USED);
1321 /* Make descriptor updates visible to hardware */
1324 /* When this happens, the hardware stats registers for
1325 * whatever caused this is updated, so we don't have to record
1330 static int gem_rx(struct macb_queue *queue, struct napi_struct *napi,
1333 struct macb *bp = queue->bp;
1336 struct sk_buff *skb;
1337 struct macb_dma_desc *desc;
1340 while (count < budget) {
1345 entry = macb_rx_ring_wrap(bp, queue->rx_tail);
1346 desc = macb_rx_desc(queue, entry);
1348 /* Make hw descriptor updates visible to CPU */
1351 rxused = (desc->addr & MACB_BIT(RX_USED)) ? true : false;
1352 addr = macb_get_addr(bp, desc);
1357 /* Ensure ctrl is at least as up-to-date as rxused */
1365 if (!(ctrl & MACB_BIT(RX_SOF) && ctrl & MACB_BIT(RX_EOF))) {
1367 "not whole frame pointed by descriptor\n");
1368 bp->dev->stats.rx_dropped++;
1369 queue->stats.rx_dropped++;
1372 skb = queue->rx_skbuff[entry];
1373 if (unlikely(!skb)) {
1375 "inconsistent Rx descriptor chain\n");
1376 bp->dev->stats.rx_dropped++;
1377 queue->stats.rx_dropped++;
1380 /* now everything is ready for receiving packet */
1381 queue->rx_skbuff[entry] = NULL;
1382 len = ctrl & bp->rx_frm_len_mask;
1384 netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len);
1387 dma_unmap_single(&bp->pdev->dev, addr,
1388 bp->rx_buffer_size, DMA_FROM_DEVICE);
1390 skb->protocol = eth_type_trans(skb, bp->dev);
1391 skb_checksum_none_assert(skb);
1392 if (bp->dev->features & NETIF_F_RXCSUM &&
1393 !(bp->dev->flags & IFF_PROMISC) &&
1394 GEM_BFEXT(RX_CSUM, ctrl) & GEM_RX_CSUM_CHECKED_MASK)
1395 skb->ip_summed = CHECKSUM_UNNECESSARY;
1397 bp->dev->stats.rx_packets++;
1398 queue->stats.rx_packets++;
1399 bp->dev->stats.rx_bytes += skb->len;
1400 queue->stats.rx_bytes += skb->len;
1402 gem_ptp_do_rxstamp(bp, skb, desc);
1404 #if defined(DEBUG) && defined(VERBOSE_DEBUG)
1405 netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
1406 skb->len, skb->csum);
1407 print_hex_dump(KERN_DEBUG, " mac: ", DUMP_PREFIX_ADDRESS, 16, 1,
1408 skb_mac_header(skb), 16, true);
1409 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_ADDRESS, 16, 1,
1410 skb->data, 32, true);
1413 napi_gro_receive(napi, skb);
1416 gem_rx_refill(queue);
1421 static int macb_rx_frame(struct macb_queue *queue, struct napi_struct *napi,
1422 unsigned int first_frag, unsigned int last_frag)
1426 unsigned int offset;
1427 struct sk_buff *skb;
1428 struct macb_dma_desc *desc;
1429 struct macb *bp = queue->bp;
1431 desc = macb_rx_desc(queue, last_frag);
1432 len = desc->ctrl & bp->rx_frm_len_mask;
1434 netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n",
1435 macb_rx_ring_wrap(bp, first_frag),
1436 macb_rx_ring_wrap(bp, last_frag), len);
1438 /* The ethernet header starts NET_IP_ALIGN bytes into the
1439 * first buffer. Since the header is 14 bytes, this makes the
1440 * payload word-aligned.
1442 * Instead of calling skb_reserve(NET_IP_ALIGN), we just copy
1443 * the two padding bytes into the skb so that we avoid hitting
1444 * the slowpath in memcpy(), and pull them off afterwards.
1446 skb = netdev_alloc_skb(bp->dev, len + NET_IP_ALIGN);
1448 bp->dev->stats.rx_dropped++;
1449 for (frag = first_frag; ; frag++) {
1450 desc = macb_rx_desc(queue, frag);
1451 desc->addr &= ~MACB_BIT(RX_USED);
1452 if (frag == last_frag)
1456 /* Make descriptor updates visible to hardware */
1463 len += NET_IP_ALIGN;
1464 skb_checksum_none_assert(skb);
1467 for (frag = first_frag; ; frag++) {
1468 unsigned int frag_len = bp->rx_buffer_size;
1470 if (offset + frag_len > len) {
1471 if (unlikely(frag != last_frag)) {
1472 dev_kfree_skb_any(skb);
1475 frag_len = len - offset;
1477 skb_copy_to_linear_data_offset(skb, offset,
1478 macb_rx_buffer(queue, frag),
1480 offset += bp->rx_buffer_size;
1481 desc = macb_rx_desc(queue, frag);
1482 desc->addr &= ~MACB_BIT(RX_USED);
1484 if (frag == last_frag)
1488 /* Make descriptor updates visible to hardware */
1491 __skb_pull(skb, NET_IP_ALIGN);
1492 skb->protocol = eth_type_trans(skb, bp->dev);
1494 bp->dev->stats.rx_packets++;
1495 bp->dev->stats.rx_bytes += skb->len;
1496 netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
1497 skb->len, skb->csum);
1498 napi_gro_receive(napi, skb);
1503 static inline void macb_init_rx_ring(struct macb_queue *queue)
1505 struct macb *bp = queue->bp;
1507 struct macb_dma_desc *desc = NULL;
1510 addr = queue->rx_buffers_dma;
1511 for (i = 0; i < bp->rx_ring_size; i++) {
1512 desc = macb_rx_desc(queue, i);
1513 macb_set_addr(bp, desc, addr);
1515 addr += bp->rx_buffer_size;
1517 desc->addr |= MACB_BIT(RX_WRAP);
1521 static int macb_rx(struct macb_queue *queue, struct napi_struct *napi,
1524 struct macb *bp = queue->bp;
1525 bool reset_rx_queue = false;
1528 int first_frag = -1;
1530 for (tail = queue->rx_tail; budget > 0; tail++) {
1531 struct macb_dma_desc *desc = macb_rx_desc(queue, tail);
1534 /* Make hw descriptor updates visible to CPU */
1537 if (!(desc->addr & MACB_BIT(RX_USED)))
1540 /* Ensure ctrl is at least as up-to-date as addr */
1545 if (ctrl & MACB_BIT(RX_SOF)) {
1546 if (first_frag != -1)
1547 discard_partial_frame(queue, first_frag, tail);
1551 if (ctrl & MACB_BIT(RX_EOF)) {
1554 if (unlikely(first_frag == -1)) {
1555 reset_rx_queue = true;
1559 dropped = macb_rx_frame(queue, napi, first_frag, tail);
1561 if (unlikely(dropped < 0)) {
1562 reset_rx_queue = true;
1572 if (unlikely(reset_rx_queue)) {
1573 unsigned long flags;
1576 netdev_err(bp->dev, "RX queue corruption: reset it\n");
1578 spin_lock_irqsave(&bp->lock, flags);
1580 ctrl = macb_readl(bp, NCR);
1581 macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE));
1583 macb_init_rx_ring(queue);
1584 queue_writel(queue, RBQP, queue->rx_ring_dma);
1586 macb_writel(bp, NCR, ctrl | MACB_BIT(RE));
1588 spin_unlock_irqrestore(&bp->lock, flags);
1592 if (first_frag != -1)
1593 queue->rx_tail = first_frag;
1595 queue->rx_tail = tail;
1600 static int macb_poll(struct napi_struct *napi, int budget)
1602 struct macb_queue *queue = container_of(napi, struct macb_queue, napi);
1603 struct macb *bp = queue->bp;
1607 status = macb_readl(bp, RSR);
1608 macb_writel(bp, RSR, status);
1610 netdev_vdbg(bp->dev, "poll: status = %08lx, budget = %d\n",
1611 (unsigned long)status, budget);
1613 work_done = bp->macbgem_ops.mog_rx(queue, napi, budget);
1614 if (work_done < budget) {
1615 napi_complete_done(napi, work_done);
1617 /* Packets received while interrupts were disabled */
1618 status = macb_readl(bp, RSR);
1620 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1621 queue_writel(queue, ISR, MACB_BIT(RCOMP));
1622 napi_reschedule(napi);
1624 queue_writel(queue, IER, bp->rx_intr_mask);
1628 /* TODO: Handle errors */
1633 static void macb_hresp_error_task(struct tasklet_struct *t)
1635 struct macb *bp = from_tasklet(bp, t, hresp_err_tasklet);
1636 struct net_device *dev = bp->dev;
1637 struct macb_queue *queue;
1641 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
1642 queue_writel(queue, IDR, bp->rx_intr_mask |
1646 ctrl = macb_readl(bp, NCR);
1647 ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE));
1648 macb_writel(bp, NCR, ctrl);
1650 netif_tx_stop_all_queues(dev);
1651 netif_carrier_off(dev);
1653 bp->macbgem_ops.mog_init_rings(bp);
1655 /* Initialize TX and RX buffers */
1656 macb_init_buffers(bp);
1658 /* Enable interrupts */
1659 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
1660 queue_writel(queue, IER,
1665 ctrl |= MACB_BIT(RE) | MACB_BIT(TE);
1666 macb_writel(bp, NCR, ctrl);
1668 netif_carrier_on(dev);
1669 netif_tx_start_all_queues(dev);
1672 static void macb_tx_restart(struct macb_queue *queue)
1674 unsigned int head = queue->tx_head;
1675 unsigned int tail = queue->tx_tail;
1676 struct macb *bp = queue->bp;
1678 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1679 queue_writel(queue, ISR, MACB_BIT(TXUBR));
1684 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
1687 static irqreturn_t macb_wol_interrupt(int irq, void *dev_id)
1689 struct macb_queue *queue = dev_id;
1690 struct macb *bp = queue->bp;
1693 status = queue_readl(queue, ISR);
1695 if (unlikely(!status))
1698 spin_lock(&bp->lock);
1700 if (status & MACB_BIT(WOL)) {
1701 queue_writel(queue, IDR, MACB_BIT(WOL));
1702 macb_writel(bp, WOL, 0);
1703 netdev_vdbg(bp->dev, "MACB WoL: queue = %u, isr = 0x%08lx\n",
1704 (unsigned int)(queue - bp->queues),
1705 (unsigned long)status);
1706 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1707 queue_writel(queue, ISR, MACB_BIT(WOL));
1708 pm_wakeup_event(&bp->pdev->dev, 0);
1711 spin_unlock(&bp->lock);
1716 static irqreturn_t gem_wol_interrupt(int irq, void *dev_id)
1718 struct macb_queue *queue = dev_id;
1719 struct macb *bp = queue->bp;
1722 status = queue_readl(queue, ISR);
1724 if (unlikely(!status))
1727 spin_lock(&bp->lock);
1729 if (status & GEM_BIT(WOL)) {
1730 queue_writel(queue, IDR, GEM_BIT(WOL));
1731 gem_writel(bp, WOL, 0);
1732 netdev_vdbg(bp->dev, "GEM WoL: queue = %u, isr = 0x%08lx\n",
1733 (unsigned int)(queue - bp->queues),
1734 (unsigned long)status);
1735 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1736 queue_writel(queue, ISR, GEM_BIT(WOL));
1737 pm_wakeup_event(&bp->pdev->dev, 0);
1740 spin_unlock(&bp->lock);
1745 static irqreturn_t macb_interrupt(int irq, void *dev_id)
1747 struct macb_queue *queue = dev_id;
1748 struct macb *bp = queue->bp;
1749 struct net_device *dev = bp->dev;
1752 status = queue_readl(queue, ISR);
1754 if (unlikely(!status))
1757 spin_lock(&bp->lock);
1760 /* close possible race with dev_close */
1761 if (unlikely(!netif_running(dev))) {
1762 queue_writel(queue, IDR, -1);
1763 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1764 queue_writel(queue, ISR, -1);
1768 netdev_vdbg(bp->dev, "queue = %u, isr = 0x%08lx\n",
1769 (unsigned int)(queue - bp->queues),
1770 (unsigned long)status);
1772 if (status & bp->rx_intr_mask) {
1773 /* There's no point taking any more interrupts
1774 * until we have processed the buffers. The
1775 * scheduling call may fail if the poll routine
1776 * is already scheduled, so disable interrupts
1779 queue_writel(queue, IDR, bp->rx_intr_mask);
1780 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1781 queue_writel(queue, ISR, MACB_BIT(RCOMP));
1783 if (napi_schedule_prep(&queue->napi)) {
1784 netdev_vdbg(bp->dev, "scheduling RX softirq\n");
1785 __napi_schedule(&queue->napi);
1789 if (unlikely(status & (MACB_TX_ERR_FLAGS))) {
1790 queue_writel(queue, IDR, MACB_TX_INT_FLAGS);
1791 schedule_work(&queue->tx_error_task);
1793 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1794 queue_writel(queue, ISR, MACB_TX_ERR_FLAGS);
1799 if (status & MACB_BIT(TCOMP))
1800 macb_tx_interrupt(queue);
1802 if (status & MACB_BIT(TXUBR))
1803 macb_tx_restart(queue);
1805 /* Link change detection isn't possible with RMII, so we'll
1806 * add that if/when we get our hands on a full-blown MII PHY.
1809 /* There is a hardware issue under heavy load where DMA can
1810 * stop, this causes endless "used buffer descriptor read"
1811 * interrupts but it can be cleared by re-enabling RX. See
1812 * the at91rm9200 manual, section 41.3.1 or the Zynq manual
1813 * section 16.7.4 for details. RXUBR is only enabled for
1814 * these two versions.
1816 if (status & MACB_BIT(RXUBR)) {
1817 ctrl = macb_readl(bp, NCR);
1818 macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE));
1820 macb_writel(bp, NCR, ctrl | MACB_BIT(RE));
1822 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1823 queue_writel(queue, ISR, MACB_BIT(RXUBR));
1826 if (status & MACB_BIT(ISR_ROVR)) {
1827 /* We missed at least one packet */
1828 if (macb_is_gem(bp))
1829 bp->hw_stats.gem.rx_overruns++;
1831 bp->hw_stats.macb.rx_overruns++;
1833 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1834 queue_writel(queue, ISR, MACB_BIT(ISR_ROVR));
1837 if (status & MACB_BIT(HRESP)) {
1838 tasklet_schedule(&bp->hresp_err_tasklet);
1839 netdev_err(dev, "DMA bus error: HRESP not OK\n");
1841 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1842 queue_writel(queue, ISR, MACB_BIT(HRESP));
1844 status = queue_readl(queue, ISR);
1847 spin_unlock(&bp->lock);
1852 #ifdef CONFIG_NET_POLL_CONTROLLER
1853 /* Polling receive - used by netconsole and other diagnostic tools
1854 * to allow network i/o with interrupts disabled.
1856 static void macb_poll_controller(struct net_device *dev)
1858 struct macb *bp = netdev_priv(dev);
1859 struct macb_queue *queue;
1860 unsigned long flags;
1863 local_irq_save(flags);
1864 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
1865 macb_interrupt(dev->irq, queue);
1866 local_irq_restore(flags);
1870 static unsigned int macb_tx_map(struct macb *bp,
1871 struct macb_queue *queue,
1872 struct sk_buff *skb,
1873 unsigned int hdrlen)
1876 unsigned int len, entry, i, tx_head = queue->tx_head;
1877 struct macb_tx_skb *tx_skb = NULL;
1878 struct macb_dma_desc *desc;
1879 unsigned int offset, size, count = 0;
1880 unsigned int f, nr_frags = skb_shinfo(skb)->nr_frags;
1881 unsigned int eof = 1, mss_mfs = 0;
1882 u32 ctrl, lso_ctrl = 0, seq_ctrl = 0;
1885 if (skb_shinfo(skb)->gso_size != 0) {
1886 if (ip_hdr(skb)->protocol == IPPROTO_UDP)
1888 lso_ctrl = MACB_LSO_UFO_ENABLE;
1891 lso_ctrl = MACB_LSO_TSO_ENABLE;
1894 /* First, map non-paged data */
1895 len = skb_headlen(skb);
1897 /* first buffer length */
1902 entry = macb_tx_ring_wrap(bp, tx_head);
1903 tx_skb = &queue->tx_skb[entry];
1905 mapping = dma_map_single(&bp->pdev->dev,
1907 size, DMA_TO_DEVICE);
1908 if (dma_mapping_error(&bp->pdev->dev, mapping))
1911 /* Save info to properly release resources */
1913 tx_skb->mapping = mapping;
1914 tx_skb->size = size;
1915 tx_skb->mapped_as_page = false;
1922 size = min(len, bp->max_tx_length);
1925 /* Then, map paged data from fragments */
1926 for (f = 0; f < nr_frags; f++) {
1927 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
1929 len = skb_frag_size(frag);
1932 size = min(len, bp->max_tx_length);
1933 entry = macb_tx_ring_wrap(bp, tx_head);
1934 tx_skb = &queue->tx_skb[entry];
1936 mapping = skb_frag_dma_map(&bp->pdev->dev, frag,
1937 offset, size, DMA_TO_DEVICE);
1938 if (dma_mapping_error(&bp->pdev->dev, mapping))
1941 /* Save info to properly release resources */
1943 tx_skb->mapping = mapping;
1944 tx_skb->size = size;
1945 tx_skb->mapped_as_page = true;
1954 /* Should never happen */
1955 if (unlikely(!tx_skb)) {
1956 netdev_err(bp->dev, "BUG! empty skb!\n");
1960 /* This is the last buffer of the frame: save socket buffer */
1963 /* Update TX ring: update buffer descriptors in reverse order
1964 * to avoid race condition
1967 /* Set 'TX_USED' bit in buffer descriptor at tx_head position
1968 * to set the end of TX queue
1971 entry = macb_tx_ring_wrap(bp, i);
1972 ctrl = MACB_BIT(TX_USED);
1973 desc = macb_tx_desc(queue, entry);
1977 if (lso_ctrl == MACB_LSO_UFO_ENABLE)
1978 /* include header and FCS in value given to h/w */
1979 mss_mfs = skb_shinfo(skb)->gso_size +
1980 skb_transport_offset(skb) +
1983 mss_mfs = skb_shinfo(skb)->gso_size;
1984 /* TCP Sequence Number Source Select
1985 * can be set only for TSO
1993 entry = macb_tx_ring_wrap(bp, i);
1994 tx_skb = &queue->tx_skb[entry];
1995 desc = macb_tx_desc(queue, entry);
1997 ctrl = (u32)tx_skb->size;
1999 ctrl |= MACB_BIT(TX_LAST);
2002 if (unlikely(entry == (bp->tx_ring_size - 1)))
2003 ctrl |= MACB_BIT(TX_WRAP);
2005 /* First descriptor is header descriptor */
2006 if (i == queue->tx_head) {
2007 ctrl |= MACB_BF(TX_LSO, lso_ctrl);
2008 ctrl |= MACB_BF(TX_TCP_SEQ_SRC, seq_ctrl);
2009 if ((bp->dev->features & NETIF_F_HW_CSUM) &&
2010 skb->ip_summed != CHECKSUM_PARTIAL && !lso_ctrl)
2011 ctrl |= MACB_BIT(TX_NOCRC);
2013 /* Only set MSS/MFS on payload descriptors
2014 * (second or later descriptor)
2016 ctrl |= MACB_BF(MSS_MFS, mss_mfs);
2018 /* Set TX buffer descriptor */
2019 macb_set_addr(bp, desc, tx_skb->mapping);
2020 /* desc->addr must be visible to hardware before clearing
2021 * 'TX_USED' bit in desc->ctrl.
2025 } while (i != queue->tx_head);
2027 queue->tx_head = tx_head;
2032 netdev_err(bp->dev, "TX DMA map failed\n");
2034 for (i = queue->tx_head; i != tx_head; i++) {
2035 tx_skb = macb_tx_skb(queue, i);
2037 macb_tx_unmap(bp, tx_skb);
2043 static netdev_features_t macb_features_check(struct sk_buff *skb,
2044 struct net_device *dev,
2045 netdev_features_t features)
2047 unsigned int nr_frags, f;
2048 unsigned int hdrlen;
2050 /* Validate LSO compatibility */
2052 /* there is only one buffer or protocol is not UDP */
2053 if (!skb_is_nonlinear(skb) || (ip_hdr(skb)->protocol != IPPROTO_UDP))
2056 /* length of header */
2057 hdrlen = skb_transport_offset(skb);
2060 * When software supplies two or more payload buffers all payload buffers
2061 * apart from the last must be a multiple of 8 bytes in size.
2063 if (!IS_ALIGNED(skb_headlen(skb) - hdrlen, MACB_TX_LEN_ALIGN))
2064 return features & ~MACB_NETIF_LSO;
2066 nr_frags = skb_shinfo(skb)->nr_frags;
2067 /* No need to check last fragment */
2069 for (f = 0; f < nr_frags; f++) {
2070 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2072 if (!IS_ALIGNED(skb_frag_size(frag), MACB_TX_LEN_ALIGN))
2073 return features & ~MACB_NETIF_LSO;
2078 static inline int macb_clear_csum(struct sk_buff *skb)
2080 /* no change for packets without checksum offloading */
2081 if (skb->ip_summed != CHECKSUM_PARTIAL)
2084 /* make sure we can modify the header */
2085 if (unlikely(skb_cow_head(skb, 0)))
2088 /* initialize checksum field
2089 * This is required - at least for Zynq, which otherwise calculates
2090 * wrong UDP header checksums for UDP packets with UDP data len <=2
2092 *(__sum16 *)(skb_checksum_start(skb) + skb->csum_offset) = 0;
2096 static int macb_pad_and_fcs(struct sk_buff **skb, struct net_device *ndev)
2098 bool cloned = skb_cloned(*skb) || skb_header_cloned(*skb) ||
2099 skb_is_nonlinear(*skb);
2100 int padlen = ETH_ZLEN - (*skb)->len;
2101 int headroom = skb_headroom(*skb);
2102 int tailroom = skb_tailroom(*skb);
2103 struct sk_buff *nskb;
2106 if (!(ndev->features & NETIF_F_HW_CSUM) ||
2107 !((*skb)->ip_summed != CHECKSUM_PARTIAL) ||
2108 skb_shinfo(*skb)->gso_size) /* Not available for GSO */
2112 /* FCS could be appeded to tailroom. */
2113 if (tailroom >= ETH_FCS_LEN)
2115 /* FCS could be appeded by moving data to headroom. */
2116 else if (!cloned && headroom + tailroom >= ETH_FCS_LEN)
2118 /* No room for FCS, need to reallocate skb. */
2120 padlen = ETH_FCS_LEN;
2122 /* Add room for FCS. */
2123 padlen += ETH_FCS_LEN;
2126 if (!cloned && headroom + tailroom >= padlen) {
2127 (*skb)->data = memmove((*skb)->head, (*skb)->data, (*skb)->len);
2128 skb_set_tail_pointer(*skb, (*skb)->len);
2130 nskb = skb_copy_expand(*skb, 0, padlen, GFP_ATOMIC);
2134 dev_consume_skb_any(*skb);
2138 if (padlen > ETH_FCS_LEN)
2139 skb_put_zero(*skb, padlen - ETH_FCS_LEN);
2142 /* set FCS to packet */
2143 fcs = crc32_le(~0, (*skb)->data, (*skb)->len);
2146 skb_put_u8(*skb, fcs & 0xff);
2147 skb_put_u8(*skb, (fcs >> 8) & 0xff);
2148 skb_put_u8(*skb, (fcs >> 16) & 0xff);
2149 skb_put_u8(*skb, (fcs >> 24) & 0xff);
2154 static netdev_tx_t macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
2156 u16 queue_index = skb_get_queue_mapping(skb);
2157 struct macb *bp = netdev_priv(dev);
2158 struct macb_queue *queue = &bp->queues[queue_index];
2159 unsigned long flags;
2160 unsigned int desc_cnt, nr_frags, frag_size, f;
2161 unsigned int hdrlen;
2163 netdev_tx_t ret = NETDEV_TX_OK;
2165 if (macb_clear_csum(skb)) {
2166 dev_kfree_skb_any(skb);
2170 if (macb_pad_and_fcs(&skb, dev)) {
2171 dev_kfree_skb_any(skb);
2175 is_lso = (skb_shinfo(skb)->gso_size != 0);
2178 /* length of headers */
2179 if (ip_hdr(skb)->protocol == IPPROTO_UDP)
2180 /* only queue eth + ip headers separately for UDP */
2181 hdrlen = skb_transport_offset(skb);
2183 hdrlen = skb_transport_offset(skb) + tcp_hdrlen(skb);
2184 if (skb_headlen(skb) < hdrlen) {
2185 netdev_err(bp->dev, "Error - LSO headers fragmented!!!\n");
2186 /* if this is required, would need to copy to single buffer */
2187 return NETDEV_TX_BUSY;
2190 hdrlen = min(skb_headlen(skb), bp->max_tx_length);
2192 #if defined(DEBUG) && defined(VERBOSE_DEBUG)
2193 netdev_vdbg(bp->dev,
2194 "start_xmit: queue %hu len %u head %p data %p tail %p end %p\n",
2195 queue_index, skb->len, skb->head, skb->data,
2196 skb_tail_pointer(skb), skb_end_pointer(skb));
2197 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_OFFSET, 16, 1,
2198 skb->data, 16, true);
2201 /* Count how many TX buffer descriptors are needed to send this
2202 * socket buffer: skb fragments of jumbo frames may need to be
2203 * split into many buffer descriptors.
2205 if (is_lso && (skb_headlen(skb) > hdrlen))
2206 /* extra header descriptor if also payload in first buffer */
2207 desc_cnt = DIV_ROUND_UP((skb_headlen(skb) - hdrlen), bp->max_tx_length) + 1;
2209 desc_cnt = DIV_ROUND_UP(skb_headlen(skb), bp->max_tx_length);
2210 nr_frags = skb_shinfo(skb)->nr_frags;
2211 for (f = 0; f < nr_frags; f++) {
2212 frag_size = skb_frag_size(&skb_shinfo(skb)->frags[f]);
2213 desc_cnt += DIV_ROUND_UP(frag_size, bp->max_tx_length);
2216 spin_lock_irqsave(&bp->lock, flags);
2218 /* This is a hard error, log it. */
2219 if (CIRC_SPACE(queue->tx_head, queue->tx_tail,
2220 bp->tx_ring_size) < desc_cnt) {
2221 netif_stop_subqueue(dev, queue_index);
2222 spin_unlock_irqrestore(&bp->lock, flags);
2223 netdev_dbg(bp->dev, "tx_head = %u, tx_tail = %u\n",
2224 queue->tx_head, queue->tx_tail);
2225 return NETDEV_TX_BUSY;
2228 /* Map socket buffer for DMA transfer */
2229 if (!macb_tx_map(bp, queue, skb, hdrlen)) {
2230 dev_kfree_skb_any(skb);
2234 /* Make newly initialized descriptor visible to hardware */
2236 skb_tx_timestamp(skb);
2238 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
2240 if (CIRC_SPACE(queue->tx_head, queue->tx_tail, bp->tx_ring_size) < 1)
2241 netif_stop_subqueue(dev, queue_index);
2244 spin_unlock_irqrestore(&bp->lock, flags);
2249 static void macb_init_rx_buffer_size(struct macb *bp, size_t size)
2251 if (!macb_is_gem(bp)) {
2252 bp->rx_buffer_size = MACB_RX_BUFFER_SIZE;
2254 bp->rx_buffer_size = size;
2256 if (bp->rx_buffer_size % RX_BUFFER_MULTIPLE) {
2258 "RX buffer must be multiple of %d bytes, expanding\n",
2259 RX_BUFFER_MULTIPLE);
2260 bp->rx_buffer_size =
2261 roundup(bp->rx_buffer_size, RX_BUFFER_MULTIPLE);
2265 netdev_dbg(bp->dev, "mtu [%u] rx_buffer_size [%zu]\n",
2266 bp->dev->mtu, bp->rx_buffer_size);
2269 static void gem_free_rx_buffers(struct macb *bp)
2271 struct sk_buff *skb;
2272 struct macb_dma_desc *desc;
2273 struct macb_queue *queue;
2278 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2279 if (!queue->rx_skbuff)
2282 for (i = 0; i < bp->rx_ring_size; i++) {
2283 skb = queue->rx_skbuff[i];
2288 desc = macb_rx_desc(queue, i);
2289 addr = macb_get_addr(bp, desc);
2291 dma_unmap_single(&bp->pdev->dev, addr, bp->rx_buffer_size,
2293 dev_kfree_skb_any(skb);
2297 kfree(queue->rx_skbuff);
2298 queue->rx_skbuff = NULL;
2302 static void macb_free_rx_buffers(struct macb *bp)
2304 struct macb_queue *queue = &bp->queues[0];
2306 if (queue->rx_buffers) {
2307 dma_free_coherent(&bp->pdev->dev,
2308 bp->rx_ring_size * bp->rx_buffer_size,
2309 queue->rx_buffers, queue->rx_buffers_dma);
2310 queue->rx_buffers = NULL;
2314 static void macb_free_consistent(struct macb *bp)
2316 struct macb_queue *queue;
2320 bp->macbgem_ops.mog_free_rx_buffers(bp);
2322 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2323 kfree(queue->tx_skb);
2324 queue->tx_skb = NULL;
2325 if (queue->tx_ring) {
2326 size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch;
2327 dma_free_coherent(&bp->pdev->dev, size,
2328 queue->tx_ring, queue->tx_ring_dma);
2329 queue->tx_ring = NULL;
2331 if (queue->rx_ring) {
2332 size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch;
2333 dma_free_coherent(&bp->pdev->dev, size,
2334 queue->rx_ring, queue->rx_ring_dma);
2335 queue->rx_ring = NULL;
2340 static int gem_alloc_rx_buffers(struct macb *bp)
2342 struct macb_queue *queue;
2346 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2347 size = bp->rx_ring_size * sizeof(struct sk_buff *);
2348 queue->rx_skbuff = kzalloc(size, GFP_KERNEL);
2349 if (!queue->rx_skbuff)
2353 "Allocated %d RX struct sk_buff entries at %p\n",
2354 bp->rx_ring_size, queue->rx_skbuff);
2359 static int macb_alloc_rx_buffers(struct macb *bp)
2361 struct macb_queue *queue = &bp->queues[0];
2364 size = bp->rx_ring_size * bp->rx_buffer_size;
2365 queue->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
2366 &queue->rx_buffers_dma, GFP_KERNEL);
2367 if (!queue->rx_buffers)
2371 "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
2372 size, (unsigned long)queue->rx_buffers_dma, queue->rx_buffers);
2376 static int macb_alloc_consistent(struct macb *bp)
2378 struct macb_queue *queue;
2382 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2383 size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch;
2384 queue->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
2385 &queue->tx_ring_dma,
2387 if (!queue->tx_ring)
2390 "Allocated TX ring for queue %u of %d bytes at %08lx (mapped %p)\n",
2391 q, size, (unsigned long)queue->tx_ring_dma,
2394 size = bp->tx_ring_size * sizeof(struct macb_tx_skb);
2395 queue->tx_skb = kmalloc(size, GFP_KERNEL);
2399 size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch;
2400 queue->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
2401 &queue->rx_ring_dma, GFP_KERNEL);
2402 if (!queue->rx_ring)
2405 "Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
2406 size, (unsigned long)queue->rx_ring_dma, queue->rx_ring);
2408 if (bp->macbgem_ops.mog_alloc_rx_buffers(bp))
2414 macb_free_consistent(bp);
2418 static void gem_init_rings(struct macb *bp)
2420 struct macb_queue *queue;
2421 struct macb_dma_desc *desc = NULL;
2425 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2426 for (i = 0; i < bp->tx_ring_size; i++) {
2427 desc = macb_tx_desc(queue, i);
2428 macb_set_addr(bp, desc, 0);
2429 desc->ctrl = MACB_BIT(TX_USED);
2431 desc->ctrl |= MACB_BIT(TX_WRAP);
2436 queue->rx_prepared_head = 0;
2438 gem_rx_refill(queue);
2443 static void macb_init_rings(struct macb *bp)
2446 struct macb_dma_desc *desc = NULL;
2448 macb_init_rx_ring(&bp->queues[0]);
2450 for (i = 0; i < bp->tx_ring_size; i++) {
2451 desc = macb_tx_desc(&bp->queues[0], i);
2452 macb_set_addr(bp, desc, 0);
2453 desc->ctrl = MACB_BIT(TX_USED);
2455 bp->queues[0].tx_head = 0;
2456 bp->queues[0].tx_tail = 0;
2457 desc->ctrl |= MACB_BIT(TX_WRAP);
2460 static void macb_reset_hw(struct macb *bp)
2462 struct macb_queue *queue;
2464 u32 ctrl = macb_readl(bp, NCR);
2466 /* Disable RX and TX (XXX: Should we halt the transmission
2469 ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE));
2471 /* Clear the stats registers (XXX: Update stats first?) */
2472 ctrl |= MACB_BIT(CLRSTAT);
2474 macb_writel(bp, NCR, ctrl);
2476 /* Clear all status flags */
2477 macb_writel(bp, TSR, -1);
2478 macb_writel(bp, RSR, -1);
2480 /* Disable all interrupts */
2481 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2482 queue_writel(queue, IDR, -1);
2483 queue_readl(queue, ISR);
2484 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
2485 queue_writel(queue, ISR, -1);
2489 static u32 gem_mdc_clk_div(struct macb *bp)
2492 unsigned long pclk_hz = clk_get_rate(bp->pclk);
2494 if (pclk_hz <= 20000000)
2495 config = GEM_BF(CLK, GEM_CLK_DIV8);
2496 else if (pclk_hz <= 40000000)
2497 config = GEM_BF(CLK, GEM_CLK_DIV16);
2498 else if (pclk_hz <= 80000000)
2499 config = GEM_BF(CLK, GEM_CLK_DIV32);
2500 else if (pclk_hz <= 120000000)
2501 config = GEM_BF(CLK, GEM_CLK_DIV48);
2502 else if (pclk_hz <= 160000000)
2503 config = GEM_BF(CLK, GEM_CLK_DIV64);
2505 config = GEM_BF(CLK, GEM_CLK_DIV96);
2510 static u32 macb_mdc_clk_div(struct macb *bp)
2513 unsigned long pclk_hz;
2515 if (macb_is_gem(bp))
2516 return gem_mdc_clk_div(bp);
2518 pclk_hz = clk_get_rate(bp->pclk);
2519 if (pclk_hz <= 20000000)
2520 config = MACB_BF(CLK, MACB_CLK_DIV8);
2521 else if (pclk_hz <= 40000000)
2522 config = MACB_BF(CLK, MACB_CLK_DIV16);
2523 else if (pclk_hz <= 80000000)
2524 config = MACB_BF(CLK, MACB_CLK_DIV32);
2526 config = MACB_BF(CLK, MACB_CLK_DIV64);
2531 /* Get the DMA bus width field of the network configuration register that we
2532 * should program. We find the width from decoding the design configuration
2533 * register to find the maximum supported data bus width.
2535 static u32 macb_dbw(struct macb *bp)
2537 if (!macb_is_gem(bp))
2540 switch (GEM_BFEXT(DBWDEF, gem_readl(bp, DCFG1))) {
2542 return GEM_BF(DBW, GEM_DBW128);
2544 return GEM_BF(DBW, GEM_DBW64);
2547 return GEM_BF(DBW, GEM_DBW32);
2551 /* Configure the receive DMA engine
2552 * - use the correct receive buffer size
2553 * - set best burst length for DMA operations
2554 * (if not supported by FIFO, it will fallback to default)
2555 * - set both rx/tx packet buffers to full memory size
2556 * These are configurable parameters for GEM.
2558 static void macb_configure_dma(struct macb *bp)
2560 struct macb_queue *queue;
2565 buffer_size = bp->rx_buffer_size / RX_BUFFER_MULTIPLE;
2566 if (macb_is_gem(bp)) {
2567 dmacfg = gem_readl(bp, DMACFG) & ~GEM_BF(RXBS, -1L);
2568 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2570 queue_writel(queue, RBQS, buffer_size);
2572 dmacfg |= GEM_BF(RXBS, buffer_size);
2574 if (bp->dma_burst_length)
2575 dmacfg = GEM_BFINS(FBLDO, bp->dma_burst_length, dmacfg);
2576 dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L);
2577 dmacfg &= ~GEM_BIT(ENDIA_PKT);
2580 dmacfg &= ~GEM_BIT(ENDIA_DESC);
2582 dmacfg |= GEM_BIT(ENDIA_DESC); /* CPU in big endian */
2584 if (bp->dev->features & NETIF_F_HW_CSUM)
2585 dmacfg |= GEM_BIT(TXCOEN);
2587 dmacfg &= ~GEM_BIT(TXCOEN);
2589 dmacfg &= ~GEM_BIT(ADDR64);
2590 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
2591 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
2592 dmacfg |= GEM_BIT(ADDR64);
2594 #ifdef CONFIG_MACB_USE_HWSTAMP
2595 if (bp->hw_dma_cap & HW_DMA_CAP_PTP)
2596 dmacfg |= GEM_BIT(RXEXT) | GEM_BIT(TXEXT);
2598 netdev_dbg(bp->dev, "Cadence configure DMA with 0x%08x\n",
2600 gem_writel(bp, DMACFG, dmacfg);
2604 static void macb_init_hw(struct macb *bp)
2609 macb_set_hwaddr(bp);
2611 config = macb_mdc_clk_div(bp);
2612 config |= MACB_BF(RBOF, NET_IP_ALIGN); /* Make eth data aligned */
2613 config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
2614 if (bp->caps & MACB_CAPS_JUMBO)
2615 config |= MACB_BIT(JFRAME); /* Enable jumbo frames */
2617 config |= MACB_BIT(BIG); /* Receive oversized frames */
2618 if (bp->dev->flags & IFF_PROMISC)
2619 config |= MACB_BIT(CAF); /* Copy All Frames */
2620 else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM)
2621 config |= GEM_BIT(RXCOEN);
2622 if (!(bp->dev->flags & IFF_BROADCAST))
2623 config |= MACB_BIT(NBC); /* No BroadCast */
2624 config |= macb_dbw(bp);
2625 macb_writel(bp, NCFGR, config);
2626 if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len)
2627 gem_writel(bp, JML, bp->jumbo_max_len);
2628 bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK;
2629 if (bp->caps & MACB_CAPS_JUMBO)
2630 bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK;
2632 macb_configure_dma(bp);
2635 /* The hash address register is 64 bits long and takes up two
2636 * locations in the memory map. The least significant bits are stored
2637 * in EMAC_HSL and the most significant bits in EMAC_HSH.
2639 * The unicast hash enable and the multicast hash enable bits in the
2640 * network configuration register enable the reception of hash matched
2641 * frames. The destination address is reduced to a 6 bit index into
2642 * the 64 bit hash register using the following hash function. The
2643 * hash function is an exclusive or of every sixth bit of the
2644 * destination address.
2646 * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
2647 * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
2648 * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
2649 * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
2650 * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
2651 * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
2653 * da[0] represents the least significant bit of the first byte
2654 * received, that is, the multicast/unicast indicator, and da[47]
2655 * represents the most significant bit of the last byte received. If
2656 * the hash index, hi[n], points to a bit that is set in the hash
2657 * register then the frame will be matched according to whether the
2658 * frame is multicast or unicast. A multicast match will be signalled
2659 * if the multicast hash enable bit is set, da[0] is 1 and the hash
2660 * index points to a bit set in the hash register. A unicast match
2661 * will be signalled if the unicast hash enable bit is set, da[0] is 0
2662 * and the hash index points to a bit set in the hash register. To
2663 * receive all multicast frames, the hash register should be set with
2664 * all ones and the multicast hash enable bit should be set in the
2665 * network configuration register.
2668 static inline int hash_bit_value(int bitnr, __u8 *addr)
2670 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
2675 /* Return the hash index value for the specified address. */
2676 static int hash_get_index(__u8 *addr)
2681 for (j = 0; j < 6; j++) {
2682 for (i = 0, bitval = 0; i < 8; i++)
2683 bitval ^= hash_bit_value(i * 6 + j, addr);
2685 hash_index |= (bitval << j);
2691 /* Add multicast addresses to the internal multicast-hash table. */
2692 static void macb_sethashtable(struct net_device *dev)
2694 struct netdev_hw_addr *ha;
2695 unsigned long mc_filter[2];
2697 struct macb *bp = netdev_priv(dev);
2702 netdev_for_each_mc_addr(ha, dev) {
2703 bitnr = hash_get_index(ha->addr);
2704 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
2707 macb_or_gem_writel(bp, HRB, mc_filter[0]);
2708 macb_or_gem_writel(bp, HRT, mc_filter[1]);
2711 /* Enable/Disable promiscuous and multicast modes. */
2712 static void macb_set_rx_mode(struct net_device *dev)
2715 struct macb *bp = netdev_priv(dev);
2717 cfg = macb_readl(bp, NCFGR);
2719 if (dev->flags & IFF_PROMISC) {
2720 /* Enable promiscuous mode */
2721 cfg |= MACB_BIT(CAF);
2723 /* Disable RX checksum offload */
2724 if (macb_is_gem(bp))
2725 cfg &= ~GEM_BIT(RXCOEN);
2727 /* Disable promiscuous mode */
2728 cfg &= ~MACB_BIT(CAF);
2730 /* Enable RX checksum offload only if requested */
2731 if (macb_is_gem(bp) && dev->features & NETIF_F_RXCSUM)
2732 cfg |= GEM_BIT(RXCOEN);
2735 if (dev->flags & IFF_ALLMULTI) {
2736 /* Enable all multicast mode */
2737 macb_or_gem_writel(bp, HRB, -1);
2738 macb_or_gem_writel(bp, HRT, -1);
2739 cfg |= MACB_BIT(NCFGR_MTI);
2740 } else if (!netdev_mc_empty(dev)) {
2741 /* Enable specific multicasts */
2742 macb_sethashtable(dev);
2743 cfg |= MACB_BIT(NCFGR_MTI);
2744 } else if (dev->flags & (~IFF_ALLMULTI)) {
2745 /* Disable all multicast mode */
2746 macb_or_gem_writel(bp, HRB, 0);
2747 macb_or_gem_writel(bp, HRT, 0);
2748 cfg &= ~MACB_BIT(NCFGR_MTI);
2751 macb_writel(bp, NCFGR, cfg);
2754 static int macb_open(struct net_device *dev)
2756 size_t bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN;
2757 struct macb *bp = netdev_priv(dev);
2758 struct macb_queue *queue;
2762 netdev_dbg(bp->dev, "open\n");
2764 err = pm_runtime_get_sync(&bp->pdev->dev);
2768 /* RX buffers initialization */
2769 macb_init_rx_buffer_size(bp, bufsz);
2771 err = macb_alloc_consistent(bp);
2773 netdev_err(dev, "Unable to allocate DMA memory (error %d)\n",
2778 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
2779 napi_enable(&queue->napi);
2783 err = macb_phylink_connect(bp);
2787 netif_tx_start_all_queues(dev);
2790 bp->ptp_info->ptp_init(dev);
2796 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
2797 napi_disable(&queue->napi);
2798 macb_free_consistent(bp);
2800 pm_runtime_put_sync(&bp->pdev->dev);
2804 static int macb_close(struct net_device *dev)
2806 struct macb *bp = netdev_priv(dev);
2807 struct macb_queue *queue;
2808 unsigned long flags;
2811 netif_tx_stop_all_queues(dev);
2813 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
2814 napi_disable(&queue->napi);
2816 phylink_stop(bp->phylink);
2817 phylink_disconnect_phy(bp->phylink);
2819 spin_lock_irqsave(&bp->lock, flags);
2821 netif_carrier_off(dev);
2822 spin_unlock_irqrestore(&bp->lock, flags);
2824 macb_free_consistent(bp);
2827 bp->ptp_info->ptp_remove(dev);
2829 pm_runtime_put(&bp->pdev->dev);
2834 static int macb_change_mtu(struct net_device *dev, int new_mtu)
2836 if (netif_running(dev))
2844 static void gem_update_stats(struct macb *bp)
2846 struct macb_queue *queue;
2847 unsigned int i, q, idx;
2848 unsigned long *stat;
2850 u32 *p = &bp->hw_stats.gem.tx_octets_31_0;
2852 for (i = 0; i < GEM_STATS_LEN; ++i, ++p) {
2853 u32 offset = gem_statistics[i].offset;
2854 u64 val = bp->macb_reg_readl(bp, offset);
2856 bp->ethtool_stats[i] += val;
2859 if (offset == GEM_OCTTXL || offset == GEM_OCTRXL) {
2860 /* Add GEM_OCTTXH, GEM_OCTRXH */
2861 val = bp->macb_reg_readl(bp, offset + 4);
2862 bp->ethtool_stats[i] += ((u64)val) << 32;
2867 idx = GEM_STATS_LEN;
2868 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
2869 for (i = 0, stat = &queue->stats.first; i < QUEUE_STATS_LEN; ++i, ++stat)
2870 bp->ethtool_stats[idx++] = *stat;
2873 static struct net_device_stats *gem_get_stats(struct macb *bp)
2875 struct gem_stats *hwstat = &bp->hw_stats.gem;
2876 struct net_device_stats *nstat = &bp->dev->stats;
2878 if (!netif_running(bp->dev))
2881 gem_update_stats(bp);
2883 nstat->rx_errors = (hwstat->rx_frame_check_sequence_errors +
2884 hwstat->rx_alignment_errors +
2885 hwstat->rx_resource_errors +
2886 hwstat->rx_overruns +
2887 hwstat->rx_oversize_frames +
2888 hwstat->rx_jabbers +
2889 hwstat->rx_undersized_frames +
2890 hwstat->rx_length_field_frame_errors);
2891 nstat->tx_errors = (hwstat->tx_late_collisions +
2892 hwstat->tx_excessive_collisions +
2893 hwstat->tx_underrun +
2894 hwstat->tx_carrier_sense_errors);
2895 nstat->multicast = hwstat->rx_multicast_frames;
2896 nstat->collisions = (hwstat->tx_single_collision_frames +
2897 hwstat->tx_multiple_collision_frames +
2898 hwstat->tx_excessive_collisions);
2899 nstat->rx_length_errors = (hwstat->rx_oversize_frames +
2900 hwstat->rx_jabbers +
2901 hwstat->rx_undersized_frames +
2902 hwstat->rx_length_field_frame_errors);
2903 nstat->rx_over_errors = hwstat->rx_resource_errors;
2904 nstat->rx_crc_errors = hwstat->rx_frame_check_sequence_errors;
2905 nstat->rx_frame_errors = hwstat->rx_alignment_errors;
2906 nstat->rx_fifo_errors = hwstat->rx_overruns;
2907 nstat->tx_aborted_errors = hwstat->tx_excessive_collisions;
2908 nstat->tx_carrier_errors = hwstat->tx_carrier_sense_errors;
2909 nstat->tx_fifo_errors = hwstat->tx_underrun;
2914 static void gem_get_ethtool_stats(struct net_device *dev,
2915 struct ethtool_stats *stats, u64 *data)
2919 bp = netdev_priv(dev);
2920 gem_update_stats(bp);
2921 memcpy(data, &bp->ethtool_stats, sizeof(u64)
2922 * (GEM_STATS_LEN + QUEUE_STATS_LEN * MACB_MAX_QUEUES));
2925 static int gem_get_sset_count(struct net_device *dev, int sset)
2927 struct macb *bp = netdev_priv(dev);
2931 return GEM_STATS_LEN + bp->num_queues * QUEUE_STATS_LEN;
2937 static void gem_get_ethtool_strings(struct net_device *dev, u32 sset, u8 *p)
2939 char stat_string[ETH_GSTRING_LEN];
2940 struct macb *bp = netdev_priv(dev);
2941 struct macb_queue *queue;
2947 for (i = 0; i < GEM_STATS_LEN; i++, p += ETH_GSTRING_LEN)
2948 memcpy(p, gem_statistics[i].stat_string,
2951 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2952 for (i = 0; i < QUEUE_STATS_LEN; i++, p += ETH_GSTRING_LEN) {
2953 snprintf(stat_string, ETH_GSTRING_LEN, "q%d_%s",
2954 q, queue_statistics[i].stat_string);
2955 memcpy(p, stat_string, ETH_GSTRING_LEN);
2962 static struct net_device_stats *macb_get_stats(struct net_device *dev)
2964 struct macb *bp = netdev_priv(dev);
2965 struct net_device_stats *nstat = &bp->dev->stats;
2966 struct macb_stats *hwstat = &bp->hw_stats.macb;
2968 if (macb_is_gem(bp))
2969 return gem_get_stats(bp);
2971 /* read stats from hardware */
2972 macb_update_stats(bp);
2974 /* Convert HW stats into netdevice stats */
2975 nstat->rx_errors = (hwstat->rx_fcs_errors +
2976 hwstat->rx_align_errors +
2977 hwstat->rx_resource_errors +
2978 hwstat->rx_overruns +
2979 hwstat->rx_oversize_pkts +
2980 hwstat->rx_jabbers +
2981 hwstat->rx_undersize_pkts +
2982 hwstat->rx_length_mismatch);
2983 nstat->tx_errors = (hwstat->tx_late_cols +
2984 hwstat->tx_excessive_cols +
2985 hwstat->tx_underruns +
2986 hwstat->tx_carrier_errors +
2987 hwstat->sqe_test_errors);
2988 nstat->collisions = (hwstat->tx_single_cols +
2989 hwstat->tx_multiple_cols +
2990 hwstat->tx_excessive_cols);
2991 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
2992 hwstat->rx_jabbers +
2993 hwstat->rx_undersize_pkts +
2994 hwstat->rx_length_mismatch);
2995 nstat->rx_over_errors = hwstat->rx_resource_errors +
2996 hwstat->rx_overruns;
2997 nstat->rx_crc_errors = hwstat->rx_fcs_errors;
2998 nstat->rx_frame_errors = hwstat->rx_align_errors;
2999 nstat->rx_fifo_errors = hwstat->rx_overruns;
3000 /* XXX: What does "missed" mean? */
3001 nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
3002 nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
3003 nstat->tx_fifo_errors = hwstat->tx_underruns;
3004 /* Don't know about heartbeat or window errors... */
3009 static int macb_get_regs_len(struct net_device *netdev)
3011 return MACB_GREGS_NBR * sizeof(u32);
3014 static void macb_get_regs(struct net_device *dev, struct ethtool_regs *regs,
3017 struct macb *bp = netdev_priv(dev);
3018 unsigned int tail, head;
3021 regs->version = (macb_readl(bp, MID) & ((1 << MACB_REV_SIZE) - 1))
3022 | MACB_GREGS_VERSION;
3024 tail = macb_tx_ring_wrap(bp, bp->queues[0].tx_tail);
3025 head = macb_tx_ring_wrap(bp, bp->queues[0].tx_head);
3027 regs_buff[0] = macb_readl(bp, NCR);
3028 regs_buff[1] = macb_or_gem_readl(bp, NCFGR);
3029 regs_buff[2] = macb_readl(bp, NSR);
3030 regs_buff[3] = macb_readl(bp, TSR);
3031 regs_buff[4] = macb_readl(bp, RBQP);
3032 regs_buff[5] = macb_readl(bp, TBQP);
3033 regs_buff[6] = macb_readl(bp, RSR);
3034 regs_buff[7] = macb_readl(bp, IMR);
3036 regs_buff[8] = tail;
3037 regs_buff[9] = head;
3038 regs_buff[10] = macb_tx_dma(&bp->queues[0], tail);
3039 regs_buff[11] = macb_tx_dma(&bp->queues[0], head);
3041 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED))
3042 regs_buff[12] = macb_or_gem_readl(bp, USRIO);
3043 if (macb_is_gem(bp))
3044 regs_buff[13] = gem_readl(bp, DMACFG);
3047 static void macb_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
3049 struct macb *bp = netdev_priv(netdev);
3051 if (bp->wol & MACB_WOL_HAS_MAGIC_PACKET) {
3052 phylink_ethtool_get_wol(bp->phylink, wol);
3053 wol->supported |= WAKE_MAGIC;
3055 if (bp->wol & MACB_WOL_ENABLED)
3056 wol->wolopts |= WAKE_MAGIC;
3060 static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
3062 struct macb *bp = netdev_priv(netdev);
3065 /* Pass the order to phylink layer */
3066 ret = phylink_ethtool_set_wol(bp->phylink, wol);
3067 /* Don't manage WoL on MAC if handled by the PHY
3068 * or if there's a failure in talking to the PHY
3070 if (!ret || ret != -EOPNOTSUPP)
3073 if (!(bp->wol & MACB_WOL_HAS_MAGIC_PACKET) ||
3074 (wol->wolopts & ~WAKE_MAGIC))
3077 if (wol->wolopts & WAKE_MAGIC)
3078 bp->wol |= MACB_WOL_ENABLED;
3080 bp->wol &= ~MACB_WOL_ENABLED;
3082 device_set_wakeup_enable(&bp->pdev->dev, bp->wol & MACB_WOL_ENABLED);
3087 static int macb_get_link_ksettings(struct net_device *netdev,
3088 struct ethtool_link_ksettings *kset)
3090 struct macb *bp = netdev_priv(netdev);
3092 return phylink_ethtool_ksettings_get(bp->phylink, kset);
3095 static int macb_set_link_ksettings(struct net_device *netdev,
3096 const struct ethtool_link_ksettings *kset)
3098 struct macb *bp = netdev_priv(netdev);
3100 return phylink_ethtool_ksettings_set(bp->phylink, kset);
3103 static void macb_get_ringparam(struct net_device *netdev,
3104 struct ethtool_ringparam *ring)
3106 struct macb *bp = netdev_priv(netdev);
3108 ring->rx_max_pending = MAX_RX_RING_SIZE;
3109 ring->tx_max_pending = MAX_TX_RING_SIZE;
3111 ring->rx_pending = bp->rx_ring_size;
3112 ring->tx_pending = bp->tx_ring_size;
3115 static int macb_set_ringparam(struct net_device *netdev,
3116 struct ethtool_ringparam *ring)
3118 struct macb *bp = netdev_priv(netdev);
3119 u32 new_rx_size, new_tx_size;
3120 unsigned int reset = 0;
3122 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
3125 new_rx_size = clamp_t(u32, ring->rx_pending,
3126 MIN_RX_RING_SIZE, MAX_RX_RING_SIZE);
3127 new_rx_size = roundup_pow_of_two(new_rx_size);
3129 new_tx_size = clamp_t(u32, ring->tx_pending,
3130 MIN_TX_RING_SIZE, MAX_TX_RING_SIZE);
3131 new_tx_size = roundup_pow_of_two(new_tx_size);
3133 if ((new_tx_size == bp->tx_ring_size) &&
3134 (new_rx_size == bp->rx_ring_size)) {
3139 if (netif_running(bp->dev)) {
3141 macb_close(bp->dev);
3144 bp->rx_ring_size = new_rx_size;
3145 bp->tx_ring_size = new_tx_size;
3153 #ifdef CONFIG_MACB_USE_HWSTAMP
3154 static unsigned int gem_get_tsu_rate(struct macb *bp)
3156 struct clk *tsu_clk;
3157 unsigned int tsu_rate;
3159 tsu_clk = devm_clk_get(&bp->pdev->dev, "tsu_clk");
3160 if (!IS_ERR(tsu_clk))
3161 tsu_rate = clk_get_rate(tsu_clk);
3162 /* try pclk instead */
3163 else if (!IS_ERR(bp->pclk)) {
3165 tsu_rate = clk_get_rate(tsu_clk);
3171 static s32 gem_get_ptp_max_adj(void)
3176 static int gem_get_ts_info(struct net_device *dev,
3177 struct ethtool_ts_info *info)
3179 struct macb *bp = netdev_priv(dev);
3181 if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0) {
3182 ethtool_op_get_ts_info(dev, info);
3186 info->so_timestamping =
3187 SOF_TIMESTAMPING_TX_SOFTWARE |
3188 SOF_TIMESTAMPING_RX_SOFTWARE |
3189 SOF_TIMESTAMPING_SOFTWARE |
3190 SOF_TIMESTAMPING_TX_HARDWARE |
3191 SOF_TIMESTAMPING_RX_HARDWARE |
3192 SOF_TIMESTAMPING_RAW_HARDWARE;
3194 (1 << HWTSTAMP_TX_ONESTEP_SYNC) |
3195 (1 << HWTSTAMP_TX_OFF) |
3196 (1 << HWTSTAMP_TX_ON);
3198 (1 << HWTSTAMP_FILTER_NONE) |
3199 (1 << HWTSTAMP_FILTER_ALL);
3201 info->phc_index = bp->ptp_clock ? ptp_clock_index(bp->ptp_clock) : -1;
3206 static struct macb_ptp_info gem_ptp_info = {
3207 .ptp_init = gem_ptp_init,
3208 .ptp_remove = gem_ptp_remove,
3209 .get_ptp_max_adj = gem_get_ptp_max_adj,
3210 .get_tsu_rate = gem_get_tsu_rate,
3211 .get_ts_info = gem_get_ts_info,
3212 .get_hwtst = gem_get_hwtst,
3213 .set_hwtst = gem_set_hwtst,
3217 static int macb_get_ts_info(struct net_device *netdev,
3218 struct ethtool_ts_info *info)
3220 struct macb *bp = netdev_priv(netdev);
3223 return bp->ptp_info->get_ts_info(netdev, info);
3225 return ethtool_op_get_ts_info(netdev, info);
3228 static void gem_enable_flow_filters(struct macb *bp, bool enable)
3230 struct net_device *netdev = bp->dev;
3231 struct ethtool_rx_fs_item *item;
3235 if (!(netdev->features & NETIF_F_NTUPLE))
3238 num_t2_scr = GEM_BFEXT(T2SCR, gem_readl(bp, DCFG8));
3240 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3241 struct ethtool_rx_flow_spec *fs = &item->fs;
3242 struct ethtool_tcpip4_spec *tp4sp_m;
3244 if (fs->location >= num_t2_scr)
3247 t2_scr = gem_readl_n(bp, SCRT2, fs->location);
3249 /* enable/disable screener regs for the flow entry */
3250 t2_scr = GEM_BFINS(ETHTEN, enable, t2_scr);
3252 /* only enable fields with no masking */
3253 tp4sp_m = &(fs->m_u.tcp_ip4_spec);
3255 if (enable && (tp4sp_m->ip4src == 0xFFFFFFFF))
3256 t2_scr = GEM_BFINS(CMPAEN, 1, t2_scr);
3258 t2_scr = GEM_BFINS(CMPAEN, 0, t2_scr);
3260 if (enable && (tp4sp_m->ip4dst == 0xFFFFFFFF))
3261 t2_scr = GEM_BFINS(CMPBEN, 1, t2_scr);
3263 t2_scr = GEM_BFINS(CMPBEN, 0, t2_scr);
3265 if (enable && ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF)))
3266 t2_scr = GEM_BFINS(CMPCEN, 1, t2_scr);
3268 t2_scr = GEM_BFINS(CMPCEN, 0, t2_scr);
3270 gem_writel_n(bp, SCRT2, fs->location, t2_scr);
3274 static void gem_prog_cmp_regs(struct macb *bp, struct ethtool_rx_flow_spec *fs)
3276 struct ethtool_tcpip4_spec *tp4sp_v, *tp4sp_m;
3277 uint16_t index = fs->location;
3283 if (!macb_is_gem(bp))
3286 tp4sp_v = &(fs->h_u.tcp_ip4_spec);
3287 tp4sp_m = &(fs->m_u.tcp_ip4_spec);
3289 /* ignore field if any masking set */
3290 if (tp4sp_m->ip4src == 0xFFFFFFFF) {
3291 /* 1st compare reg - IP source address */
3294 w0 = tp4sp_v->ip4src;
3295 w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
3296 w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1);
3297 w1 = GEM_BFINS(T2OFST, ETYPE_SRCIP_OFFSET, w1);
3298 gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w0);
3299 gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w1);
3303 /* ignore field if any masking set */
3304 if (tp4sp_m->ip4dst == 0xFFFFFFFF) {
3305 /* 2nd compare reg - IP destination address */
3308 w0 = tp4sp_v->ip4dst;
3309 w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
3310 w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1);
3311 w1 = GEM_BFINS(T2OFST, ETYPE_DSTIP_OFFSET, w1);
3312 gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4DST_CMP(index)), w0);
3313 gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4DST_CMP(index)), w1);
3317 /* ignore both port fields if masking set in both */
3318 if ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF)) {
3319 /* 3rd compare reg - source port, destination port */
3322 w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_IPHDR, w1);
3323 if (tp4sp_m->psrc == tp4sp_m->pdst) {
3324 w0 = GEM_BFINS(T2MASK, tp4sp_v->psrc, w0);
3325 w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0);
3326 w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
3327 w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1);
3329 /* only one port definition */
3330 w1 = GEM_BFINS(T2DISMSK, 0, w1); /* 16-bit compare */
3331 w0 = GEM_BFINS(T2MASK, 0xFFFF, w0);
3332 if (tp4sp_m->psrc == 0xFFFF) { /* src port */
3333 w0 = GEM_BFINS(T2CMP, tp4sp_v->psrc, w0);
3334 w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1);
3335 } else { /* dst port */
3336 w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0);
3337 w1 = GEM_BFINS(T2OFST, IPHDR_DSTPORT_OFFSET, w1);
3340 gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_PORT_CMP(index)), w0);
3341 gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_PORT_CMP(index)), w1);
3346 t2_scr = GEM_BFINS(QUEUE, (fs->ring_cookie) & 0xFF, t2_scr);
3347 t2_scr = GEM_BFINS(ETHT2IDX, SCRT2_ETHT, t2_scr);
3349 t2_scr = GEM_BFINS(CMPA, GEM_IP4SRC_CMP(index), t2_scr);
3351 t2_scr = GEM_BFINS(CMPB, GEM_IP4DST_CMP(index), t2_scr);
3353 t2_scr = GEM_BFINS(CMPC, GEM_PORT_CMP(index), t2_scr);
3354 gem_writel_n(bp, SCRT2, index, t2_scr);
3357 static int gem_add_flow_filter(struct net_device *netdev,
3358 struct ethtool_rxnfc *cmd)
3360 struct macb *bp = netdev_priv(netdev);
3361 struct ethtool_rx_flow_spec *fs = &cmd->fs;
3362 struct ethtool_rx_fs_item *item, *newfs;
3363 unsigned long flags;
3367 newfs = kmalloc(sizeof(*newfs), GFP_KERNEL);
3370 memcpy(&newfs->fs, fs, sizeof(newfs->fs));
3373 "Adding flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n",
3374 fs->flow_type, (int)fs->ring_cookie, fs->location,
3375 htonl(fs->h_u.tcp_ip4_spec.ip4src),
3376 htonl(fs->h_u.tcp_ip4_spec.ip4dst),
3377 htons(fs->h_u.tcp_ip4_spec.psrc), htons(fs->h_u.tcp_ip4_spec.pdst));
3379 spin_lock_irqsave(&bp->rx_fs_lock, flags);
3381 /* find correct place to add in list */
3382 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3383 if (item->fs.location > newfs->fs.location) {
3384 list_add_tail(&newfs->list, &item->list);
3387 } else if (item->fs.location == fs->location) {
3388 netdev_err(netdev, "Rule not added: location %d not free!\n",
3395 list_add_tail(&newfs->list, &bp->rx_fs_list.list);
3397 gem_prog_cmp_regs(bp, fs);
3398 bp->rx_fs_list.count++;
3399 /* enable filtering if NTUPLE on */
3400 gem_enable_flow_filters(bp, 1);
3402 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3406 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3411 static int gem_del_flow_filter(struct net_device *netdev,
3412 struct ethtool_rxnfc *cmd)
3414 struct macb *bp = netdev_priv(netdev);
3415 struct ethtool_rx_fs_item *item;
3416 struct ethtool_rx_flow_spec *fs;
3417 unsigned long flags;
3419 spin_lock_irqsave(&bp->rx_fs_lock, flags);
3421 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3422 if (item->fs.location == cmd->fs.location) {
3423 /* disable screener regs for the flow entry */
3426 "Deleting flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n",
3427 fs->flow_type, (int)fs->ring_cookie, fs->location,
3428 htonl(fs->h_u.tcp_ip4_spec.ip4src),
3429 htonl(fs->h_u.tcp_ip4_spec.ip4dst),
3430 htons(fs->h_u.tcp_ip4_spec.psrc),
3431 htons(fs->h_u.tcp_ip4_spec.pdst));
3433 gem_writel_n(bp, SCRT2, fs->location, 0);
3435 list_del(&item->list);
3436 bp->rx_fs_list.count--;
3437 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3443 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3447 static int gem_get_flow_entry(struct net_device *netdev,
3448 struct ethtool_rxnfc *cmd)
3450 struct macb *bp = netdev_priv(netdev);
3451 struct ethtool_rx_fs_item *item;
3453 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3454 if (item->fs.location == cmd->fs.location) {
3455 memcpy(&cmd->fs, &item->fs, sizeof(cmd->fs));
3462 static int gem_get_all_flow_entries(struct net_device *netdev,
3463 struct ethtool_rxnfc *cmd, u32 *rule_locs)
3465 struct macb *bp = netdev_priv(netdev);
3466 struct ethtool_rx_fs_item *item;
3469 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3470 if (cnt == cmd->rule_cnt)
3472 rule_locs[cnt] = item->fs.location;
3475 cmd->data = bp->max_tuples;
3476 cmd->rule_cnt = cnt;
3481 static int gem_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
3484 struct macb *bp = netdev_priv(netdev);
3488 case ETHTOOL_GRXRINGS:
3489 cmd->data = bp->num_queues;
3491 case ETHTOOL_GRXCLSRLCNT:
3492 cmd->rule_cnt = bp->rx_fs_list.count;
3494 case ETHTOOL_GRXCLSRULE:
3495 ret = gem_get_flow_entry(netdev, cmd);
3497 case ETHTOOL_GRXCLSRLALL:
3498 ret = gem_get_all_flow_entries(netdev, cmd, rule_locs);
3502 "Command parameter %d is not supported\n", cmd->cmd);
3509 static int gem_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
3511 struct macb *bp = netdev_priv(netdev);
3515 case ETHTOOL_SRXCLSRLINS:
3516 if ((cmd->fs.location >= bp->max_tuples)
3517 || (cmd->fs.ring_cookie >= bp->num_queues)) {
3521 ret = gem_add_flow_filter(netdev, cmd);
3523 case ETHTOOL_SRXCLSRLDEL:
3524 ret = gem_del_flow_filter(netdev, cmd);
3528 "Command parameter %d is not supported\n", cmd->cmd);
3535 static const struct ethtool_ops macb_ethtool_ops = {
3536 .get_regs_len = macb_get_regs_len,
3537 .get_regs = macb_get_regs,
3538 .get_link = ethtool_op_get_link,
3539 .get_ts_info = ethtool_op_get_ts_info,
3540 .get_wol = macb_get_wol,
3541 .set_wol = macb_set_wol,
3542 .get_link_ksettings = macb_get_link_ksettings,
3543 .set_link_ksettings = macb_set_link_ksettings,
3544 .get_ringparam = macb_get_ringparam,
3545 .set_ringparam = macb_set_ringparam,
3548 static const struct ethtool_ops gem_ethtool_ops = {
3549 .get_regs_len = macb_get_regs_len,
3550 .get_regs = macb_get_regs,
3551 .get_wol = macb_get_wol,
3552 .set_wol = macb_set_wol,
3553 .get_link = ethtool_op_get_link,
3554 .get_ts_info = macb_get_ts_info,
3555 .get_ethtool_stats = gem_get_ethtool_stats,
3556 .get_strings = gem_get_ethtool_strings,
3557 .get_sset_count = gem_get_sset_count,
3558 .get_link_ksettings = macb_get_link_ksettings,
3559 .set_link_ksettings = macb_set_link_ksettings,
3560 .get_ringparam = macb_get_ringparam,
3561 .set_ringparam = macb_set_ringparam,
3562 .get_rxnfc = gem_get_rxnfc,
3563 .set_rxnfc = gem_set_rxnfc,
3566 static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
3568 struct macb *bp = netdev_priv(dev);
3570 if (!netif_running(dev))
3576 return bp->ptp_info->set_hwtst(dev, rq, cmd);
3578 return bp->ptp_info->get_hwtst(dev, rq);
3582 return phylink_mii_ioctl(bp->phylink, rq, cmd);
3585 static inline void macb_set_txcsum_feature(struct macb *bp,
3586 netdev_features_t features)
3590 if (!macb_is_gem(bp))
3593 val = gem_readl(bp, DMACFG);
3594 if (features & NETIF_F_HW_CSUM)
3595 val |= GEM_BIT(TXCOEN);
3597 val &= ~GEM_BIT(TXCOEN);
3599 gem_writel(bp, DMACFG, val);
3602 static inline void macb_set_rxcsum_feature(struct macb *bp,
3603 netdev_features_t features)
3605 struct net_device *netdev = bp->dev;
3608 if (!macb_is_gem(bp))
3611 val = gem_readl(bp, NCFGR);
3612 if ((features & NETIF_F_RXCSUM) && !(netdev->flags & IFF_PROMISC))
3613 val |= GEM_BIT(RXCOEN);
3615 val &= ~GEM_BIT(RXCOEN);
3617 gem_writel(bp, NCFGR, val);
3620 static inline void macb_set_rxflow_feature(struct macb *bp,
3621 netdev_features_t features)
3623 if (!macb_is_gem(bp))
3626 gem_enable_flow_filters(bp, !!(features & NETIF_F_NTUPLE));
3629 static int macb_set_features(struct net_device *netdev,
3630 netdev_features_t features)
3632 struct macb *bp = netdev_priv(netdev);
3633 netdev_features_t changed = features ^ netdev->features;
3635 /* TX checksum offload */
3636 if (changed & NETIF_F_HW_CSUM)
3637 macb_set_txcsum_feature(bp, features);
3639 /* RX checksum offload */
3640 if (changed & NETIF_F_RXCSUM)
3641 macb_set_rxcsum_feature(bp, features);
3643 /* RX Flow Filters */
3644 if (changed & NETIF_F_NTUPLE)
3645 macb_set_rxflow_feature(bp, features);
3650 static void macb_restore_features(struct macb *bp)
3652 struct net_device *netdev = bp->dev;
3653 netdev_features_t features = netdev->features;
3654 struct ethtool_rx_fs_item *item;
3656 /* TX checksum offload */
3657 macb_set_txcsum_feature(bp, features);
3659 /* RX checksum offload */
3660 macb_set_rxcsum_feature(bp, features);
3662 /* RX Flow Filters */
3663 list_for_each_entry(item, &bp->rx_fs_list.list, list)
3664 gem_prog_cmp_regs(bp, &item->fs);
3666 macb_set_rxflow_feature(bp, features);
3669 static const struct net_device_ops macb_netdev_ops = {
3670 .ndo_open = macb_open,
3671 .ndo_stop = macb_close,
3672 .ndo_start_xmit = macb_start_xmit,
3673 .ndo_set_rx_mode = macb_set_rx_mode,
3674 .ndo_get_stats = macb_get_stats,
3675 .ndo_eth_ioctl = macb_ioctl,
3676 .ndo_validate_addr = eth_validate_addr,
3677 .ndo_change_mtu = macb_change_mtu,
3678 .ndo_set_mac_address = eth_mac_addr,
3679 #ifdef CONFIG_NET_POLL_CONTROLLER
3680 .ndo_poll_controller = macb_poll_controller,
3682 .ndo_set_features = macb_set_features,
3683 .ndo_features_check = macb_features_check,
3686 /* Configure peripheral capabilities according to device tree
3687 * and integration options used
3689 static void macb_configure_caps(struct macb *bp,
3690 const struct macb_config *dt_conf)
3695 bp->caps = dt_conf->caps;
3697 if (hw_is_gem(bp->regs, bp->native_io)) {
3698 bp->caps |= MACB_CAPS_MACB_IS_GEM;
3700 dcfg = gem_readl(bp, DCFG1);
3701 if (GEM_BFEXT(IRQCOR, dcfg) == 0)
3702 bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE;
3703 if (GEM_BFEXT(NO_PCS, dcfg) == 0)
3704 bp->caps |= MACB_CAPS_PCS;
3705 dcfg = gem_readl(bp, DCFG12);
3706 if (GEM_BFEXT(HIGH_SPEED, dcfg) == 1)
3707 bp->caps |= MACB_CAPS_HIGH_SPEED;
3708 dcfg = gem_readl(bp, DCFG2);
3709 if ((dcfg & (GEM_BIT(RX_PKT_BUFF) | GEM_BIT(TX_PKT_BUFF))) == 0)
3710 bp->caps |= MACB_CAPS_FIFO_MODE;
3711 #ifdef CONFIG_MACB_USE_HWSTAMP
3712 if (gem_has_ptp(bp)) {
3713 if (!GEM_BFEXT(TSU, gem_readl(bp, DCFG5)))
3714 dev_err(&bp->pdev->dev,
3715 "GEM doesn't support hardware ptp.\n");
3717 bp->hw_dma_cap |= HW_DMA_CAP_PTP;
3718 bp->ptp_info = &gem_ptp_info;
3724 dev_dbg(&bp->pdev->dev, "Cadence caps 0x%08x\n", bp->caps);
3727 static void macb_probe_queues(void __iomem *mem,
3729 unsigned int *queue_mask,
3730 unsigned int *num_queues)
3735 /* is it macb or gem ?
3737 * We need to read directly from the hardware here because
3738 * we are early in the probe process and don't have the
3739 * MACB_CAPS_MACB_IS_GEM flag positioned
3741 if (!hw_is_gem(mem, native_io))
3744 /* bit 0 is never set but queue 0 always exists */
3745 *queue_mask |= readl_relaxed(mem + GEM_DCFG6) & 0xff;
3746 *num_queues = hweight32(*queue_mask);
3749 static void macb_clks_disable(struct clk *pclk, struct clk *hclk, struct clk *tx_clk,
3750 struct clk *rx_clk, struct clk *tsu_clk)
3752 struct clk_bulk_data clks[] = {
3753 { .clk = tsu_clk, },
3760 clk_bulk_disable_unprepare(ARRAY_SIZE(clks), clks);
3763 static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
3764 struct clk **hclk, struct clk **tx_clk,
3765 struct clk **rx_clk, struct clk **tsu_clk)
3767 struct macb_platform_data *pdata;
3770 pdata = dev_get_platdata(&pdev->dev);
3772 *pclk = pdata->pclk;
3773 *hclk = pdata->hclk;
3775 *pclk = devm_clk_get(&pdev->dev, "pclk");
3776 *hclk = devm_clk_get(&pdev->dev, "hclk");
3779 if (IS_ERR_OR_NULL(*pclk))
3780 return dev_err_probe(&pdev->dev,
3781 IS_ERR(*pclk) ? PTR_ERR(*pclk) : -ENODEV,
3782 "failed to get pclk\n");
3784 if (IS_ERR_OR_NULL(*hclk))
3785 return dev_err_probe(&pdev->dev,
3786 IS_ERR(*hclk) ? PTR_ERR(*hclk) : -ENODEV,
3787 "failed to get hclk\n");
3789 *tx_clk = devm_clk_get_optional(&pdev->dev, "tx_clk");
3790 if (IS_ERR(*tx_clk))
3791 return PTR_ERR(*tx_clk);
3793 *rx_clk = devm_clk_get_optional(&pdev->dev, "rx_clk");
3794 if (IS_ERR(*rx_clk))
3795 return PTR_ERR(*rx_clk);
3797 *tsu_clk = devm_clk_get_optional(&pdev->dev, "tsu_clk");
3798 if (IS_ERR(*tsu_clk))
3799 return PTR_ERR(*tsu_clk);
3801 err = clk_prepare_enable(*pclk);
3803 dev_err(&pdev->dev, "failed to enable pclk (%d)\n", err);
3807 err = clk_prepare_enable(*hclk);
3809 dev_err(&pdev->dev, "failed to enable hclk (%d)\n", err);
3810 goto err_disable_pclk;
3813 err = clk_prepare_enable(*tx_clk);
3815 dev_err(&pdev->dev, "failed to enable tx_clk (%d)\n", err);
3816 goto err_disable_hclk;
3819 err = clk_prepare_enable(*rx_clk);
3821 dev_err(&pdev->dev, "failed to enable rx_clk (%d)\n", err);
3822 goto err_disable_txclk;
3825 err = clk_prepare_enable(*tsu_clk);
3827 dev_err(&pdev->dev, "failed to enable tsu_clk (%d)\n", err);
3828 goto err_disable_rxclk;
3834 clk_disable_unprepare(*rx_clk);
3837 clk_disable_unprepare(*tx_clk);
3840 clk_disable_unprepare(*hclk);
3843 clk_disable_unprepare(*pclk);
3848 static int macb_init(struct platform_device *pdev)
3850 struct net_device *dev = platform_get_drvdata(pdev);
3851 unsigned int hw_q, q;
3852 struct macb *bp = netdev_priv(dev);
3853 struct macb_queue *queue;
3857 bp->tx_ring_size = DEFAULT_TX_RING_SIZE;
3858 bp->rx_ring_size = DEFAULT_RX_RING_SIZE;
3860 /* set the queue register mapping once for all: queue0 has a special
3861 * register mapping but we don't want to test the queue index then
3862 * compute the corresponding register offset at run time.
3864 for (hw_q = 0, q = 0; hw_q < MACB_MAX_QUEUES; ++hw_q) {
3865 if (!(bp->queue_mask & (1 << hw_q)))
3868 queue = &bp->queues[q];
3870 netif_napi_add(dev, &queue->napi, macb_poll, NAPI_POLL_WEIGHT);
3872 queue->ISR = GEM_ISR(hw_q - 1);
3873 queue->IER = GEM_IER(hw_q - 1);
3874 queue->IDR = GEM_IDR(hw_q - 1);
3875 queue->IMR = GEM_IMR(hw_q - 1);
3876 queue->TBQP = GEM_TBQP(hw_q - 1);
3877 queue->RBQP = GEM_RBQP(hw_q - 1);
3878 queue->RBQS = GEM_RBQS(hw_q - 1);
3879 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
3880 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
3881 queue->TBQPH = GEM_TBQPH(hw_q - 1);
3882 queue->RBQPH = GEM_RBQPH(hw_q - 1);
3886 /* queue0 uses legacy registers */
3887 queue->ISR = MACB_ISR;
3888 queue->IER = MACB_IER;
3889 queue->IDR = MACB_IDR;
3890 queue->IMR = MACB_IMR;
3891 queue->TBQP = MACB_TBQP;
3892 queue->RBQP = MACB_RBQP;
3893 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
3894 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
3895 queue->TBQPH = MACB_TBQPH;
3896 queue->RBQPH = MACB_RBQPH;
3901 /* get irq: here we use the linux queue index, not the hardware
3902 * queue index. the queue irq definitions in the device tree
3903 * must remove the optional gaps that could exist in the
3904 * hardware queue mask.
3906 queue->irq = platform_get_irq(pdev, q);
3907 err = devm_request_irq(&pdev->dev, queue->irq, macb_interrupt,
3908 IRQF_SHARED, dev->name, queue);
3911 "Unable to request IRQ %d (error %d)\n",
3916 INIT_WORK(&queue->tx_error_task, macb_tx_error_task);
3920 dev->netdev_ops = &macb_netdev_ops;
3922 /* setup appropriated routines according to adapter type */
3923 if (macb_is_gem(bp)) {
3924 bp->max_tx_length = GEM_MAX_TX_LEN;
3925 bp->macbgem_ops.mog_alloc_rx_buffers = gem_alloc_rx_buffers;
3926 bp->macbgem_ops.mog_free_rx_buffers = gem_free_rx_buffers;
3927 bp->macbgem_ops.mog_init_rings = gem_init_rings;
3928 bp->macbgem_ops.mog_rx = gem_rx;
3929 dev->ethtool_ops = &gem_ethtool_ops;
3931 bp->max_tx_length = MACB_MAX_TX_LEN;
3932 bp->macbgem_ops.mog_alloc_rx_buffers = macb_alloc_rx_buffers;
3933 bp->macbgem_ops.mog_free_rx_buffers = macb_free_rx_buffers;
3934 bp->macbgem_ops.mog_init_rings = macb_init_rings;
3935 bp->macbgem_ops.mog_rx = macb_rx;
3936 dev->ethtool_ops = &macb_ethtool_ops;
3940 dev->hw_features = NETIF_F_SG;
3942 /* Check LSO capability */
3943 if (GEM_BFEXT(PBUF_LSO, gem_readl(bp, DCFG6)))
3944 dev->hw_features |= MACB_NETIF_LSO;
3946 /* Checksum offload is only available on gem with packet buffer */
3947 if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE))
3948 dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
3949 if (bp->caps & MACB_CAPS_SG_DISABLED)
3950 dev->hw_features &= ~NETIF_F_SG;
3951 dev->features = dev->hw_features;
3953 /* Check RX Flow Filters support.
3954 * Max Rx flows set by availability of screeners & compare regs:
3955 * each 4-tuple define requires 1 T2 screener reg + 3 compare regs
3957 reg = gem_readl(bp, DCFG8);
3958 bp->max_tuples = min((GEM_BFEXT(SCR2CMP, reg) / 3),
3959 GEM_BFEXT(T2SCR, reg));
3960 INIT_LIST_HEAD(&bp->rx_fs_list.list);
3961 if (bp->max_tuples > 0) {
3962 /* also needs one ethtype match to check IPv4 */
3963 if (GEM_BFEXT(SCR2ETH, reg) > 0) {
3964 /* program this reg now */
3966 reg = GEM_BFINS(ETHTCMP, (uint16_t)ETH_P_IP, reg);
3967 gem_writel_n(bp, ETHT, SCRT2_ETHT, reg);
3968 /* Filtering is supported in hw but don't enable it in kernel now */
3969 dev->hw_features |= NETIF_F_NTUPLE;
3970 /* init Rx flow definitions */
3971 bp->rx_fs_list.count = 0;
3972 spin_lock_init(&bp->rx_fs_lock);
3977 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) {
3979 if (phy_interface_mode_is_rgmii(bp->phy_interface))
3980 val = bp->usrio->rgmii;
3981 else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII &&
3982 (bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII))
3983 val = bp->usrio->rmii;
3984 else if (!(bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII))
3985 val = bp->usrio->mii;
3987 if (bp->caps & MACB_CAPS_USRIO_HAS_CLKEN)
3988 val |= bp->usrio->refclk;
3990 macb_or_gem_writel(bp, USRIO, val);
3993 /* Set MII management clock divider */
3994 val = macb_mdc_clk_div(bp);
3995 val |= macb_dbw(bp);
3996 if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII)
3997 val |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
3998 macb_writel(bp, NCFGR, val);
4003 static const struct macb_usrio_config macb_default_usrio = {
4004 .mii = MACB_BIT(MII),
4005 .rmii = MACB_BIT(RMII),
4006 .rgmii = GEM_BIT(RGMII),
4007 .refclk = MACB_BIT(CLKEN),
4010 #if defined(CONFIG_OF)
4011 /* 1518 rounded up */
4012 #define AT91ETHER_MAX_RBUFF_SZ 0x600
4013 /* max number of receive buffers */
4014 #define AT91ETHER_MAX_RX_DESCR 9
4016 static struct sifive_fu540_macb_mgmt *mgmt;
4018 static int at91ether_alloc_coherent(struct macb *lp)
4020 struct macb_queue *q = &lp->queues[0];
4022 q->rx_ring = dma_alloc_coherent(&lp->pdev->dev,
4023 (AT91ETHER_MAX_RX_DESCR *
4024 macb_dma_desc_get_size(lp)),
4025 &q->rx_ring_dma, GFP_KERNEL);
4029 q->rx_buffers = dma_alloc_coherent(&lp->pdev->dev,
4030 AT91ETHER_MAX_RX_DESCR *
4031 AT91ETHER_MAX_RBUFF_SZ,
4032 &q->rx_buffers_dma, GFP_KERNEL);
4033 if (!q->rx_buffers) {
4034 dma_free_coherent(&lp->pdev->dev,
4035 AT91ETHER_MAX_RX_DESCR *
4036 macb_dma_desc_get_size(lp),
4037 q->rx_ring, q->rx_ring_dma);
4045 static void at91ether_free_coherent(struct macb *lp)
4047 struct macb_queue *q = &lp->queues[0];
4050 dma_free_coherent(&lp->pdev->dev,
4051 AT91ETHER_MAX_RX_DESCR *
4052 macb_dma_desc_get_size(lp),
4053 q->rx_ring, q->rx_ring_dma);
4057 if (q->rx_buffers) {
4058 dma_free_coherent(&lp->pdev->dev,
4059 AT91ETHER_MAX_RX_DESCR *
4060 AT91ETHER_MAX_RBUFF_SZ,
4061 q->rx_buffers, q->rx_buffers_dma);
4062 q->rx_buffers = NULL;
4066 /* Initialize and start the Receiver and Transmit subsystems */
4067 static int at91ether_start(struct macb *lp)
4069 struct macb_queue *q = &lp->queues[0];
4070 struct macb_dma_desc *desc;
4075 ret = at91ether_alloc_coherent(lp);
4079 addr = q->rx_buffers_dma;
4080 for (i = 0; i < AT91ETHER_MAX_RX_DESCR; i++) {
4081 desc = macb_rx_desc(q, i);
4082 macb_set_addr(lp, desc, addr);
4084 addr += AT91ETHER_MAX_RBUFF_SZ;
4087 /* Set the Wrap bit on the last descriptor */
4088 desc->addr |= MACB_BIT(RX_WRAP);
4090 /* Reset buffer index */
4093 /* Program address of descriptor list in Rx Buffer Queue register */
4094 macb_writel(lp, RBQP, q->rx_ring_dma);
4096 /* Enable Receive and Transmit */
4097 ctl = macb_readl(lp, NCR);
4098 macb_writel(lp, NCR, ctl | MACB_BIT(RE) | MACB_BIT(TE));
4100 /* Enable MAC interrupts */
4101 macb_writel(lp, IER, MACB_BIT(RCOMP) |
4103 MACB_BIT(ISR_TUND) |
4106 MACB_BIT(ISR_ROVR) |
4112 static void at91ether_stop(struct macb *lp)
4116 /* Disable MAC interrupts */
4117 macb_writel(lp, IDR, MACB_BIT(RCOMP) |
4119 MACB_BIT(ISR_TUND) |
4122 MACB_BIT(ISR_ROVR) |
4125 /* Disable Receiver and Transmitter */
4126 ctl = macb_readl(lp, NCR);
4127 macb_writel(lp, NCR, ctl & ~(MACB_BIT(TE) | MACB_BIT(RE)));
4129 /* Free resources. */
4130 at91ether_free_coherent(lp);
4133 /* Open the ethernet interface */
4134 static int at91ether_open(struct net_device *dev)
4136 struct macb *lp = netdev_priv(dev);
4140 ret = pm_runtime_get_sync(&lp->pdev->dev);
4142 pm_runtime_put_noidle(&lp->pdev->dev);
4146 /* Clear internal statistics */
4147 ctl = macb_readl(lp, NCR);
4148 macb_writel(lp, NCR, ctl | MACB_BIT(CLRSTAT));
4150 macb_set_hwaddr(lp);
4152 ret = at91ether_start(lp);
4156 ret = macb_phylink_connect(lp);
4160 netif_start_queue(dev);
4167 pm_runtime_put_sync(&lp->pdev->dev);
4171 /* Close the interface */
4172 static int at91ether_close(struct net_device *dev)
4174 struct macb *lp = netdev_priv(dev);
4176 netif_stop_queue(dev);
4178 phylink_stop(lp->phylink);
4179 phylink_disconnect_phy(lp->phylink);
4183 return pm_runtime_put(&lp->pdev->dev);
4186 /* Transmit packet */
4187 static netdev_tx_t at91ether_start_xmit(struct sk_buff *skb,
4188 struct net_device *dev)
4190 struct macb *lp = netdev_priv(dev);
4192 if (macb_readl(lp, TSR) & MACB_BIT(RM9200_BNQ)) {
4195 netif_stop_queue(dev);
4197 /* Store packet information (to free when Tx completed) */
4198 lp->rm9200_txq[desc].skb = skb;
4199 lp->rm9200_txq[desc].size = skb->len;
4200 lp->rm9200_txq[desc].mapping = dma_map_single(&lp->pdev->dev, skb->data,
4201 skb->len, DMA_TO_DEVICE);
4202 if (dma_mapping_error(&lp->pdev->dev, lp->rm9200_txq[desc].mapping)) {
4203 dev_kfree_skb_any(skb);
4204 dev->stats.tx_dropped++;
4205 netdev_err(dev, "%s: DMA mapping error\n", __func__);
4206 return NETDEV_TX_OK;
4209 /* Set address of the data in the Transmit Address register */
4210 macb_writel(lp, TAR, lp->rm9200_txq[desc].mapping);
4211 /* Set length of the packet in the Transmit Control register */
4212 macb_writel(lp, TCR, skb->len);
4215 netdev_err(dev, "%s called, but device is busy!\n", __func__);
4216 return NETDEV_TX_BUSY;
4219 return NETDEV_TX_OK;
4222 /* Extract received frame from buffer descriptors and sent to upper layers.
4223 * (Called from interrupt context)
4225 static void at91ether_rx(struct net_device *dev)
4227 struct macb *lp = netdev_priv(dev);
4228 struct macb_queue *q = &lp->queues[0];
4229 struct macb_dma_desc *desc;
4230 unsigned char *p_recv;
4231 struct sk_buff *skb;
4232 unsigned int pktlen;
4234 desc = macb_rx_desc(q, q->rx_tail);
4235 while (desc->addr & MACB_BIT(RX_USED)) {
4236 p_recv = q->rx_buffers + q->rx_tail * AT91ETHER_MAX_RBUFF_SZ;
4237 pktlen = MACB_BF(RX_FRMLEN, desc->ctrl);
4238 skb = netdev_alloc_skb(dev, pktlen + 2);
4240 skb_reserve(skb, 2);
4241 skb_put_data(skb, p_recv, pktlen);
4243 skb->protocol = eth_type_trans(skb, dev);
4244 dev->stats.rx_packets++;
4245 dev->stats.rx_bytes += pktlen;
4248 dev->stats.rx_dropped++;
4251 if (desc->ctrl & MACB_BIT(RX_MHASH_MATCH))
4252 dev->stats.multicast++;
4254 /* reset ownership bit */
4255 desc->addr &= ~MACB_BIT(RX_USED);
4257 /* wrap after last buffer */
4258 if (q->rx_tail == AT91ETHER_MAX_RX_DESCR - 1)
4263 desc = macb_rx_desc(q, q->rx_tail);
4267 /* MAC interrupt handler */
4268 static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
4270 struct net_device *dev = dev_id;
4271 struct macb *lp = netdev_priv(dev);
4275 /* MAC Interrupt Status register indicates what interrupts are pending.
4276 * It is automatically cleared once read.
4278 intstatus = macb_readl(lp, ISR);
4280 /* Receive complete */
4281 if (intstatus & MACB_BIT(RCOMP))
4284 /* Transmit complete */
4285 if (intstatus & MACB_BIT(TCOMP)) {
4286 /* The TCOM bit is set even if the transmission failed */
4287 if (intstatus & (MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE)))
4288 dev->stats.tx_errors++;
4291 if (lp->rm9200_txq[desc].skb) {
4292 dev_consume_skb_irq(lp->rm9200_txq[desc].skb);
4293 lp->rm9200_txq[desc].skb = NULL;
4294 dma_unmap_single(&lp->pdev->dev, lp->rm9200_txq[desc].mapping,
4295 lp->rm9200_txq[desc].size, DMA_TO_DEVICE);
4296 dev->stats.tx_packets++;
4297 dev->stats.tx_bytes += lp->rm9200_txq[desc].size;
4299 netif_wake_queue(dev);
4302 /* Work-around for EMAC Errata section 41.3.1 */
4303 if (intstatus & MACB_BIT(RXUBR)) {
4304 ctl = macb_readl(lp, NCR);
4305 macb_writel(lp, NCR, ctl & ~MACB_BIT(RE));
4307 macb_writel(lp, NCR, ctl | MACB_BIT(RE));
4310 if (intstatus & MACB_BIT(ISR_ROVR))
4311 netdev_err(dev, "ROVR error\n");
4316 #ifdef CONFIG_NET_POLL_CONTROLLER
4317 static void at91ether_poll_controller(struct net_device *dev)
4319 unsigned long flags;
4321 local_irq_save(flags);
4322 at91ether_interrupt(dev->irq, dev);
4323 local_irq_restore(flags);
4327 static const struct net_device_ops at91ether_netdev_ops = {
4328 .ndo_open = at91ether_open,
4329 .ndo_stop = at91ether_close,
4330 .ndo_start_xmit = at91ether_start_xmit,
4331 .ndo_get_stats = macb_get_stats,
4332 .ndo_set_rx_mode = macb_set_rx_mode,
4333 .ndo_set_mac_address = eth_mac_addr,
4334 .ndo_eth_ioctl = macb_ioctl,
4335 .ndo_validate_addr = eth_validate_addr,
4336 #ifdef CONFIG_NET_POLL_CONTROLLER
4337 .ndo_poll_controller = at91ether_poll_controller,
4341 static int at91ether_clk_init(struct platform_device *pdev, struct clk **pclk,
4342 struct clk **hclk, struct clk **tx_clk,
4343 struct clk **rx_clk, struct clk **tsu_clk)
4352 *pclk = devm_clk_get(&pdev->dev, "ether_clk");
4354 return PTR_ERR(*pclk);
4356 err = clk_prepare_enable(*pclk);
4358 dev_err(&pdev->dev, "failed to enable pclk (%d)\n", err);
4365 static int at91ether_init(struct platform_device *pdev)
4367 struct net_device *dev = platform_get_drvdata(pdev);
4368 struct macb *bp = netdev_priv(dev);
4371 bp->queues[0].bp = bp;
4373 dev->netdev_ops = &at91ether_netdev_ops;
4374 dev->ethtool_ops = &macb_ethtool_ops;
4376 err = devm_request_irq(&pdev->dev, dev->irq, at91ether_interrupt,
4381 macb_writel(bp, NCR, 0);
4383 macb_writel(bp, NCFGR, MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG));
4388 static unsigned long fu540_macb_tx_recalc_rate(struct clk_hw *hw,
4389 unsigned long parent_rate)
4394 static long fu540_macb_tx_round_rate(struct clk_hw *hw, unsigned long rate,
4395 unsigned long *parent_rate)
4397 if (WARN_ON(rate < 2500000))
4399 else if (rate == 2500000)
4401 else if (WARN_ON(rate < 13750000))
4403 else if (WARN_ON(rate < 25000000))
4405 else if (rate == 25000000)
4407 else if (WARN_ON(rate < 75000000))
4409 else if (WARN_ON(rate < 125000000))
4411 else if (rate == 125000000)
4414 WARN_ON(rate > 125000000);
4419 static int fu540_macb_tx_set_rate(struct clk_hw *hw, unsigned long rate,
4420 unsigned long parent_rate)
4422 rate = fu540_macb_tx_round_rate(hw, rate, &parent_rate);
4423 if (rate != 125000000)
4424 iowrite32(1, mgmt->reg);
4426 iowrite32(0, mgmt->reg);
4432 static const struct clk_ops fu540_c000_ops = {
4433 .recalc_rate = fu540_macb_tx_recalc_rate,
4434 .round_rate = fu540_macb_tx_round_rate,
4435 .set_rate = fu540_macb_tx_set_rate,
4438 static int fu540_c000_clk_init(struct platform_device *pdev, struct clk **pclk,
4439 struct clk **hclk, struct clk **tx_clk,
4440 struct clk **rx_clk, struct clk **tsu_clk)
4442 struct clk_init_data init;
4445 err = macb_clk_init(pdev, pclk, hclk, tx_clk, rx_clk, tsu_clk);
4449 mgmt = devm_kzalloc(&pdev->dev, sizeof(*mgmt), GFP_KERNEL);
4452 goto err_disable_clks;
4455 init.name = "sifive-gemgxl-mgmt";
4456 init.ops = &fu540_c000_ops;
4458 init.num_parents = 0;
4461 mgmt->hw.init = &init;
4463 *tx_clk = devm_clk_register(&pdev->dev, &mgmt->hw);
4464 if (IS_ERR(*tx_clk)) {
4465 err = PTR_ERR(*tx_clk);
4466 goto err_disable_clks;
4469 err = clk_prepare_enable(*tx_clk);
4471 dev_err(&pdev->dev, "failed to enable tx_clk (%u)\n", err);
4473 goto err_disable_clks;
4475 dev_info(&pdev->dev, "Registered clk switch '%s'\n", init.name);
4481 macb_clks_disable(*pclk, *hclk, *tx_clk, *rx_clk, *tsu_clk);
4486 static int fu540_c000_init(struct platform_device *pdev)
4488 mgmt->reg = devm_platform_ioremap_resource(pdev, 1);
4489 if (IS_ERR(mgmt->reg))
4490 return PTR_ERR(mgmt->reg);
4492 return macb_init(pdev);
4495 static const struct macb_usrio_config sama7g5_usrio = {
4503 static const struct macb_config fu540_c000_config = {
4504 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO |
4505 MACB_CAPS_GEM_HAS_PTP,
4506 .dma_burst_length = 16,
4507 .clk_init = fu540_c000_clk_init,
4508 .init = fu540_c000_init,
4509 .jumbo_max_len = 10240,
4510 .usrio = &macb_default_usrio,
4513 static const struct macb_config at91sam9260_config = {
4514 .caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4515 .clk_init = macb_clk_init,
4517 .usrio = &macb_default_usrio,
4520 static const struct macb_config sama5d3macb_config = {
4521 .caps = MACB_CAPS_SG_DISABLED
4522 | MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4523 .clk_init = macb_clk_init,
4525 .usrio = &macb_default_usrio,
4528 static const struct macb_config pc302gem_config = {
4529 .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
4530 .dma_burst_length = 16,
4531 .clk_init = macb_clk_init,
4533 .usrio = &macb_default_usrio,
4536 static const struct macb_config sama5d2_config = {
4537 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4538 .dma_burst_length = 16,
4539 .clk_init = macb_clk_init,
4541 .usrio = &macb_default_usrio,
4544 static const struct macb_config sama5d29_config = {
4545 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_GEM_HAS_PTP,
4546 .dma_burst_length = 16,
4547 .clk_init = macb_clk_init,
4549 .usrio = &macb_default_usrio,
4552 static const struct macb_config sama5d3_config = {
4553 .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE
4554 | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_JUMBO,
4555 .dma_burst_length = 16,
4556 .clk_init = macb_clk_init,
4558 .jumbo_max_len = 10240,
4559 .usrio = &macb_default_usrio,
4562 static const struct macb_config sama5d4_config = {
4563 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4564 .dma_burst_length = 4,
4565 .clk_init = macb_clk_init,
4567 .usrio = &macb_default_usrio,
4570 static const struct macb_config emac_config = {
4571 .caps = MACB_CAPS_NEEDS_RSTONUBR | MACB_CAPS_MACB_IS_EMAC,
4572 .clk_init = at91ether_clk_init,
4573 .init = at91ether_init,
4574 .usrio = &macb_default_usrio,
4577 static const struct macb_config np4_config = {
4578 .caps = MACB_CAPS_USRIO_DISABLED,
4579 .clk_init = macb_clk_init,
4581 .usrio = &macb_default_usrio,
4584 static const struct macb_config zynqmp_config = {
4585 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
4587 MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH,
4588 .dma_burst_length = 16,
4589 .clk_init = macb_clk_init,
4591 .jumbo_max_len = 10240,
4592 .usrio = &macb_default_usrio,
4595 static const struct macb_config zynq_config = {
4596 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_NO_GIGABIT_HALF |
4597 MACB_CAPS_NEEDS_RSTONUBR,
4598 .dma_burst_length = 16,
4599 .clk_init = macb_clk_init,
4601 .usrio = &macb_default_usrio,
4604 static const struct macb_config sama7g5_gem_config = {
4605 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG |
4606 MACB_CAPS_MIIONRGMII,
4607 .dma_burst_length = 16,
4608 .clk_init = macb_clk_init,
4610 .usrio = &sama7g5_usrio,
4613 static const struct macb_config sama7g5_emac_config = {
4614 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII |
4615 MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_MIIONRGMII,
4616 .dma_burst_length = 16,
4617 .clk_init = macb_clk_init,
4619 .usrio = &sama7g5_usrio,
4622 static const struct of_device_id macb_dt_ids[] = {
4623 { .compatible = "cdns,at32ap7000-macb" },
4624 { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
4625 { .compatible = "cdns,macb" },
4626 { .compatible = "cdns,np4-macb", .data = &np4_config },
4627 { .compatible = "cdns,pc302-gem", .data = &pc302gem_config },
4628 { .compatible = "cdns,gem", .data = &pc302gem_config },
4629 { .compatible = "cdns,sam9x60-macb", .data = &at91sam9260_config },
4630 { .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config },
4631 { .compatible = "atmel,sama5d29-gem", .data = &sama5d29_config },
4632 { .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config },
4633 { .compatible = "atmel,sama5d3-macb", .data = &sama5d3macb_config },
4634 { .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
4635 { .compatible = "cdns,at91rm9200-emac", .data = &emac_config },
4636 { .compatible = "cdns,emac", .data = &emac_config },
4637 { .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config},
4638 { .compatible = "cdns,zynq-gem", .data = &zynq_config },
4639 { .compatible = "sifive,fu540-c000-gem", .data = &fu540_c000_config },
4640 { .compatible = "microchip,sama7g5-gem", .data = &sama7g5_gem_config },
4641 { .compatible = "microchip,sama7g5-emac", .data = &sama7g5_emac_config },
4644 MODULE_DEVICE_TABLE(of, macb_dt_ids);
4645 #endif /* CONFIG_OF */
4647 static const struct macb_config default_gem_config = {
4648 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
4650 MACB_CAPS_GEM_HAS_PTP,
4651 .dma_burst_length = 16,
4652 .clk_init = macb_clk_init,
4654 .usrio = &macb_default_usrio,
4655 .jumbo_max_len = 10240,
4658 static int macb_probe(struct platform_device *pdev)
4660 const struct macb_config *macb_config = &default_gem_config;
4661 int (*clk_init)(struct platform_device *, struct clk **,
4662 struct clk **, struct clk **, struct clk **,
4663 struct clk **) = macb_config->clk_init;
4664 int (*init)(struct platform_device *) = macb_config->init;
4665 struct device_node *np = pdev->dev.of_node;
4666 struct clk *pclk, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL;
4667 struct clk *tsu_clk = NULL;
4668 unsigned int queue_mask, num_queues;
4670 phy_interface_t interface;
4671 struct net_device *dev;
4672 struct resource *regs;
4677 mem = devm_platform_get_and_ioremap_resource(pdev, 0, ®s);
4679 return PTR_ERR(mem);
4682 const struct of_device_id *match;
4684 match = of_match_node(macb_dt_ids, np);
4685 if (match && match->data) {
4686 macb_config = match->data;
4687 clk_init = macb_config->clk_init;
4688 init = macb_config->init;
4692 err = clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk, &tsu_clk);
4696 pm_runtime_set_autosuspend_delay(&pdev->dev, MACB_PM_TIMEOUT);
4697 pm_runtime_use_autosuspend(&pdev->dev);
4698 pm_runtime_get_noresume(&pdev->dev);
4699 pm_runtime_set_active(&pdev->dev);
4700 pm_runtime_enable(&pdev->dev);
4701 native_io = hw_is_native_io(mem);
4703 macb_probe_queues(mem, native_io, &queue_mask, &num_queues);
4704 dev = alloc_etherdev_mq(sizeof(*bp), num_queues);
4707 goto err_disable_clocks;
4710 dev->base_addr = regs->start;
4712 SET_NETDEV_DEV(dev, &pdev->dev);
4714 bp = netdev_priv(dev);
4718 bp->native_io = native_io;
4720 bp->macb_reg_readl = hw_readl_native;
4721 bp->macb_reg_writel = hw_writel_native;
4723 bp->macb_reg_readl = hw_readl;
4724 bp->macb_reg_writel = hw_writel;
4726 bp->num_queues = num_queues;
4727 bp->queue_mask = queue_mask;
4729 bp->dma_burst_length = macb_config->dma_burst_length;
4732 bp->tx_clk = tx_clk;
4733 bp->rx_clk = rx_clk;
4734 bp->tsu_clk = tsu_clk;
4736 bp->jumbo_max_len = macb_config->jumbo_max_len;
4739 if (of_get_property(np, "magic-packet", NULL))
4740 bp->wol |= MACB_WOL_HAS_MAGIC_PACKET;
4741 device_set_wakeup_capable(&pdev->dev, bp->wol & MACB_WOL_HAS_MAGIC_PACKET);
4743 bp->usrio = macb_config->usrio;
4745 spin_lock_init(&bp->lock);
4747 /* setup capabilities */
4748 macb_configure_caps(bp, macb_config);
4750 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
4751 if (GEM_BFEXT(DAW64, gem_readl(bp, DCFG6))) {
4752 dma_set_mask(&pdev->dev, DMA_BIT_MASK(44));
4753 bp->hw_dma_cap |= HW_DMA_CAP_64B;
4756 platform_set_drvdata(pdev, dev);
4758 dev->irq = platform_get_irq(pdev, 0);
4761 goto err_out_free_netdev;
4764 /* MTU range: 68 - 1500 or 10240 */
4765 dev->min_mtu = GEM_MTU_MIN_SIZE;
4766 if (bp->caps & MACB_CAPS_JUMBO)
4767 dev->max_mtu = gem_readl(bp, JML) - ETH_HLEN - ETH_FCS_LEN;
4769 dev->max_mtu = ETH_DATA_LEN;
4771 if (bp->caps & MACB_CAPS_BD_RD_PREFETCH) {
4772 val = GEM_BFEXT(RXBD_RDBUFF, gem_readl(bp, DCFG10));
4774 bp->rx_bd_rd_prefetch = (2 << (val - 1)) *
4775 macb_dma_desc_get_size(bp);
4777 val = GEM_BFEXT(TXBD_RDBUFF, gem_readl(bp, DCFG10));
4779 bp->tx_bd_rd_prefetch = (2 << (val - 1)) *
4780 macb_dma_desc_get_size(bp);
4783 bp->rx_intr_mask = MACB_RX_INT_FLAGS;
4784 if (bp->caps & MACB_CAPS_NEEDS_RSTONUBR)
4785 bp->rx_intr_mask |= MACB_BIT(RXUBR);
4787 err = of_get_ethdev_address(np, bp->dev);
4788 if (err == -EPROBE_DEFER)
4789 goto err_out_free_netdev;
4791 macb_get_hwaddr(bp);
4793 err = of_get_phy_mode(np, &interface);
4795 /* not found in DT, MII by default */
4796 bp->phy_interface = PHY_INTERFACE_MODE_MII;
4798 bp->phy_interface = interface;
4800 /* IP specific init */
4803 goto err_out_free_netdev;
4805 err = macb_mii_init(bp);
4807 goto err_out_free_netdev;
4809 netif_carrier_off(dev);
4811 err = register_netdev(dev);
4813 dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
4814 goto err_out_unregister_mdio;
4817 tasklet_setup(&bp->hresp_err_tasklet, macb_hresp_error_task);
4819 netdev_info(dev, "Cadence %s rev 0x%08x at 0x%08lx irq %d (%pM)\n",
4820 macb_is_gem(bp) ? "GEM" : "MACB", macb_readl(bp, MID),
4821 dev->base_addr, dev->irq, dev->dev_addr);
4823 pm_runtime_mark_last_busy(&bp->pdev->dev);
4824 pm_runtime_put_autosuspend(&bp->pdev->dev);
4828 err_out_unregister_mdio:
4829 mdiobus_unregister(bp->mii_bus);
4830 mdiobus_free(bp->mii_bus);
4832 err_out_free_netdev:
4836 macb_clks_disable(pclk, hclk, tx_clk, rx_clk, tsu_clk);
4837 pm_runtime_disable(&pdev->dev);
4838 pm_runtime_set_suspended(&pdev->dev);
4839 pm_runtime_dont_use_autosuspend(&pdev->dev);
4844 static int macb_remove(struct platform_device *pdev)
4846 struct net_device *dev;
4849 dev = platform_get_drvdata(pdev);
4852 bp = netdev_priv(dev);
4853 mdiobus_unregister(bp->mii_bus);
4854 mdiobus_free(bp->mii_bus);
4856 unregister_netdev(dev);
4857 tasklet_kill(&bp->hresp_err_tasklet);
4858 pm_runtime_disable(&pdev->dev);
4859 pm_runtime_dont_use_autosuspend(&pdev->dev);
4860 if (!pm_runtime_suspended(&pdev->dev)) {
4861 macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk,
4862 bp->rx_clk, bp->tsu_clk);
4863 pm_runtime_set_suspended(&pdev->dev);
4865 phylink_destroy(bp->phylink);
4872 static int __maybe_unused macb_suspend(struct device *dev)
4874 struct net_device *netdev = dev_get_drvdata(dev);
4875 struct macb *bp = netdev_priv(netdev);
4876 struct macb_queue *queue;
4877 unsigned long flags;
4881 if (!netif_running(netdev))
4884 if (bp->wol & MACB_WOL_ENABLED) {
4885 spin_lock_irqsave(&bp->lock, flags);
4886 /* Flush all status bits */
4887 macb_writel(bp, TSR, -1);
4888 macb_writel(bp, RSR, -1);
4889 for (q = 0, queue = bp->queues; q < bp->num_queues;
4891 /* Disable all interrupts */
4892 queue_writel(queue, IDR, -1);
4893 queue_readl(queue, ISR);
4894 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
4895 queue_writel(queue, ISR, -1);
4897 /* Change interrupt handler and
4898 * Enable WoL IRQ on queue 0
4900 devm_free_irq(dev, bp->queues[0].irq, bp->queues);
4901 if (macb_is_gem(bp)) {
4902 err = devm_request_irq(dev, bp->queues[0].irq, gem_wol_interrupt,
4903 IRQF_SHARED, netdev->name, bp->queues);
4906 "Unable to request IRQ %d (error %d)\n",
4907 bp->queues[0].irq, err);
4908 spin_unlock_irqrestore(&bp->lock, flags);
4911 queue_writel(bp->queues, IER, GEM_BIT(WOL));
4912 gem_writel(bp, WOL, MACB_BIT(MAG));
4914 err = devm_request_irq(dev, bp->queues[0].irq, macb_wol_interrupt,
4915 IRQF_SHARED, netdev->name, bp->queues);
4918 "Unable to request IRQ %d (error %d)\n",
4919 bp->queues[0].irq, err);
4920 spin_unlock_irqrestore(&bp->lock, flags);
4923 queue_writel(bp->queues, IER, MACB_BIT(WOL));
4924 macb_writel(bp, WOL, MACB_BIT(MAG));
4926 spin_unlock_irqrestore(&bp->lock, flags);
4928 enable_irq_wake(bp->queues[0].irq);
4931 netif_device_detach(netdev);
4932 for (q = 0, queue = bp->queues; q < bp->num_queues;
4934 napi_disable(&queue->napi);
4936 if (!(bp->wol & MACB_WOL_ENABLED)) {
4938 phylink_stop(bp->phylink);
4940 spin_lock_irqsave(&bp->lock, flags);
4942 spin_unlock_irqrestore(&bp->lock, flags);
4945 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED))
4946 bp->pm_data.usrio = macb_or_gem_readl(bp, USRIO);
4948 if (netdev->hw_features & NETIF_F_NTUPLE)
4949 bp->pm_data.scrt2 = gem_readl_n(bp, ETHT, SCRT2_ETHT);
4952 bp->ptp_info->ptp_remove(netdev);
4953 if (!device_may_wakeup(dev))
4954 pm_runtime_force_suspend(dev);
4959 static int __maybe_unused macb_resume(struct device *dev)
4961 struct net_device *netdev = dev_get_drvdata(dev);
4962 struct macb *bp = netdev_priv(netdev);
4963 struct macb_queue *queue;
4964 unsigned long flags;
4968 if (!netif_running(netdev))
4971 if (!device_may_wakeup(dev))
4972 pm_runtime_force_resume(dev);
4974 if (bp->wol & MACB_WOL_ENABLED) {
4975 spin_lock_irqsave(&bp->lock, flags);
4977 if (macb_is_gem(bp)) {
4978 queue_writel(bp->queues, IDR, GEM_BIT(WOL));
4979 gem_writel(bp, WOL, 0);
4981 queue_writel(bp->queues, IDR, MACB_BIT(WOL));
4982 macb_writel(bp, WOL, 0);
4984 /* Clear ISR on queue 0 */
4985 queue_readl(bp->queues, ISR);
4986 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
4987 queue_writel(bp->queues, ISR, -1);
4988 /* Replace interrupt handler on queue 0 */
4989 devm_free_irq(dev, bp->queues[0].irq, bp->queues);
4990 err = devm_request_irq(dev, bp->queues[0].irq, macb_interrupt,
4991 IRQF_SHARED, netdev->name, bp->queues);
4994 "Unable to request IRQ %d (error %d)\n",
4995 bp->queues[0].irq, err);
4996 spin_unlock_irqrestore(&bp->lock, flags);
4999 spin_unlock_irqrestore(&bp->lock, flags);
5001 disable_irq_wake(bp->queues[0].irq);
5003 /* Now make sure we disable phy before moving
5004 * to common restore path
5007 phylink_stop(bp->phylink);
5011 for (q = 0, queue = bp->queues; q < bp->num_queues;
5013 napi_enable(&queue->napi);
5015 if (netdev->hw_features & NETIF_F_NTUPLE)
5016 gem_writel_n(bp, ETHT, SCRT2_ETHT, bp->pm_data.scrt2);
5018 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED))
5019 macb_or_gem_writel(bp, USRIO, bp->pm_data.usrio);
5021 macb_writel(bp, NCR, MACB_BIT(MPE));
5023 macb_set_rx_mode(netdev);
5024 macb_restore_features(bp);
5026 phylink_start(bp->phylink);
5029 netif_device_attach(netdev);
5031 bp->ptp_info->ptp_init(netdev);
5036 static int __maybe_unused macb_runtime_suspend(struct device *dev)
5038 struct net_device *netdev = dev_get_drvdata(dev);
5039 struct macb *bp = netdev_priv(netdev);
5041 if (!(device_may_wakeup(dev)))
5042 macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk, bp->rx_clk, bp->tsu_clk);
5044 macb_clks_disable(NULL, NULL, NULL, NULL, bp->tsu_clk);
5049 static int __maybe_unused macb_runtime_resume(struct device *dev)
5051 struct net_device *netdev = dev_get_drvdata(dev);
5052 struct macb *bp = netdev_priv(netdev);
5054 if (!(device_may_wakeup(dev))) {
5055 clk_prepare_enable(bp->pclk);
5056 clk_prepare_enable(bp->hclk);
5057 clk_prepare_enable(bp->tx_clk);
5058 clk_prepare_enable(bp->rx_clk);
5060 clk_prepare_enable(bp->tsu_clk);
5065 static const struct dev_pm_ops macb_pm_ops = {
5066 SET_SYSTEM_SLEEP_PM_OPS(macb_suspend, macb_resume)
5067 SET_RUNTIME_PM_OPS(macb_runtime_suspend, macb_runtime_resume, NULL)
5070 static struct platform_driver macb_driver = {
5071 .probe = macb_probe,
5072 .remove = macb_remove,
5075 .of_match_table = of_match_ptr(macb_dt_ids),
5080 module_platform_driver(macb_driver);
5082 MODULE_LICENSE("GPL");
5083 MODULE_DESCRIPTION("Cadence MACB/GEM Ethernet driver");
5084 MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
5085 MODULE_ALIAS("platform:macb");