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_gpio.h>
30 #include <linux/of_mdio.h>
31 #include <linux/of_net.h>
33 #include <linux/udp.h>
34 #include <linux/tcp.h>
35 #include <linux/iopoll.h>
36 #include <linux/phy/phy.h>
37 #include <linux/pm_runtime.h>
38 #include <linux/ptp_classify.h>
39 #include <linux/reset.h>
40 #include <linux/firmware/xlnx-zynqmp.h>
41 #include <linux/inetdevice.h>
44 /* This structure is only used for MACB on SiFive FU540 devices */
45 struct sifive_fu540_macb_mgmt {
51 #define MACB_RX_BUFFER_SIZE 128
52 #define RX_BUFFER_MULTIPLE 64 /* bytes */
54 #define DEFAULT_RX_RING_SIZE 512 /* must be power of 2 */
55 #define MIN_RX_RING_SIZE 64
56 #define MAX_RX_RING_SIZE 8192
57 #define RX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \
60 #define DEFAULT_TX_RING_SIZE 512 /* must be power of 2 */
61 #define MIN_TX_RING_SIZE 64
62 #define MAX_TX_RING_SIZE 4096
63 #define TX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \
66 /* level of occupied TX descriptors under which we wake up TX process */
67 #define MACB_TX_WAKEUP_THRESH(bp) (3 * (bp)->tx_ring_size / 4)
69 #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(ISR_ROVR))
70 #define MACB_TX_ERR_FLAGS (MACB_BIT(ISR_TUND) \
73 #define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP) \
76 /* Max length of transmit frame must be a multiple of 8 bytes */
77 #define MACB_TX_LEN_ALIGN 8
78 #define MACB_MAX_TX_LEN ((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1) & ~((unsigned int)(MACB_TX_LEN_ALIGN - 1)))
79 /* Limit maximum TX length as per Cadence TSO errata. This is to avoid a
80 * false amba_error in TX path from the DMA assuming there is not enough
81 * space in the SRAM (16KB) even when there is.
83 #define GEM_MAX_TX_LEN (unsigned int)(0x3FC0)
85 #define GEM_MTU_MIN_SIZE ETH_MIN_MTU
86 #define MACB_NETIF_LSO NETIF_F_TSO
88 #define MACB_WOL_ENABLED BIT(0)
90 #define HS_SPEED_10000M 4
91 #define MACB_SERDES_RATE_10G 1
93 /* Graceful stop timeouts in us. We should allow up to
94 * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions)
96 #define MACB_HALT_TIMEOUT 14000
97 #define MACB_PM_TIMEOUT 100 /* ms */
99 #define MACB_MDIO_TIMEOUT 1000000 /* in usecs */
101 /* DMA buffer descriptor might be different size
102 * depends on hardware configuration:
104 * 1. dma address width 32 bits:
105 * word 1: 32 bit address of Data Buffer
108 * 2. dma address width 64 bits:
109 * word 1: 32 bit address of Data Buffer
111 * word 3: upper 32 bit address of Data Buffer
114 * 3. dma address width 32 bits with hardware timestamping:
115 * word 1: 32 bit address of Data Buffer
117 * word 3: timestamp word 1
118 * word 4: timestamp word 2
120 * 4. dma address width 64 bits with hardware timestamping:
121 * word 1: 32 bit address of Data Buffer
123 * word 3: upper 32 bit address of Data Buffer
125 * word 5: timestamp word 1
126 * word 6: timestamp word 2
128 static unsigned int macb_dma_desc_get_size(struct macb *bp)
131 unsigned int desc_size;
133 switch (bp->hw_dma_cap) {
135 desc_size = sizeof(struct macb_dma_desc)
136 + sizeof(struct macb_dma_desc_64);
139 desc_size = sizeof(struct macb_dma_desc)
140 + sizeof(struct macb_dma_desc_ptp);
142 case HW_DMA_CAP_64B_PTP:
143 desc_size = sizeof(struct macb_dma_desc)
144 + sizeof(struct macb_dma_desc_64)
145 + sizeof(struct macb_dma_desc_ptp);
148 desc_size = sizeof(struct macb_dma_desc);
152 return sizeof(struct macb_dma_desc);
155 static unsigned int macb_adj_dma_desc_idx(struct macb *bp, unsigned int desc_idx)
158 switch (bp->hw_dma_cap) {
163 case HW_DMA_CAP_64B_PTP:
173 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
174 static struct macb_dma_desc_64 *macb_64b_desc(struct macb *bp, struct macb_dma_desc *desc)
176 return (struct macb_dma_desc_64 *)((void *)desc
177 + sizeof(struct macb_dma_desc));
181 /* Ring buffer accessors */
182 static unsigned int macb_tx_ring_wrap(struct macb *bp, unsigned int index)
184 return index & (bp->tx_ring_size - 1);
187 static struct macb_dma_desc *macb_tx_desc(struct macb_queue *queue,
190 index = macb_tx_ring_wrap(queue->bp, index);
191 index = macb_adj_dma_desc_idx(queue->bp, index);
192 return &queue->tx_ring[index];
195 static struct macb_tx_skb *macb_tx_skb(struct macb_queue *queue,
198 return &queue->tx_skb[macb_tx_ring_wrap(queue->bp, index)];
201 static dma_addr_t macb_tx_dma(struct macb_queue *queue, unsigned int index)
205 offset = macb_tx_ring_wrap(queue->bp, index) *
206 macb_dma_desc_get_size(queue->bp);
208 return queue->tx_ring_dma + offset;
211 static unsigned int macb_rx_ring_wrap(struct macb *bp, unsigned int index)
213 return index & (bp->rx_ring_size - 1);
216 static struct macb_dma_desc *macb_rx_desc(struct macb_queue *queue, unsigned int index)
218 index = macb_rx_ring_wrap(queue->bp, index);
219 index = macb_adj_dma_desc_idx(queue->bp, index);
220 return &queue->rx_ring[index];
223 static void *macb_rx_buffer(struct macb_queue *queue, unsigned int index)
225 return queue->rx_buffers + queue->bp->rx_buffer_size *
226 macb_rx_ring_wrap(queue->bp, index);
230 static u32 hw_readl_native(struct macb *bp, int offset)
232 return __raw_readl(bp->regs + offset);
235 static void hw_writel_native(struct macb *bp, int offset, u32 value)
237 __raw_writel(value, bp->regs + offset);
240 static u32 hw_readl(struct macb *bp, int offset)
242 return readl_relaxed(bp->regs + offset);
245 static void hw_writel(struct macb *bp, int offset, u32 value)
247 writel_relaxed(value, bp->regs + offset);
250 /* Find the CPU endianness by using the loopback bit of NCR register. When the
251 * CPU is in big endian we need to program swapped mode for management
254 static bool hw_is_native_io(void __iomem *addr)
256 u32 value = MACB_BIT(LLB);
258 __raw_writel(value, addr + MACB_NCR);
259 value = __raw_readl(addr + MACB_NCR);
261 /* Write 0 back to disable everything */
262 __raw_writel(0, addr + MACB_NCR);
264 return value == MACB_BIT(LLB);
267 static bool hw_is_gem(void __iomem *addr, bool native_io)
272 id = __raw_readl(addr + MACB_MID);
274 id = readl_relaxed(addr + MACB_MID);
276 return MACB_BFEXT(IDNUM, id) >= 0x2;
279 static void macb_set_hwaddr(struct macb *bp)
284 bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr));
285 macb_or_gem_writel(bp, SA1B, bottom);
286 top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4)));
287 macb_or_gem_writel(bp, SA1T, top);
289 if (gem_has_ptp(bp)) {
290 gem_writel(bp, RXPTPUNI, bottom);
291 gem_writel(bp, TXPTPUNI, bottom);
294 /* Clear unused address register sets */
295 macb_or_gem_writel(bp, SA2B, 0);
296 macb_or_gem_writel(bp, SA2T, 0);
297 macb_or_gem_writel(bp, SA3B, 0);
298 macb_or_gem_writel(bp, SA3T, 0);
299 macb_or_gem_writel(bp, SA4B, 0);
300 macb_or_gem_writel(bp, SA4T, 0);
303 static void macb_get_hwaddr(struct macb *bp)
310 /* Check all 4 address register for valid address */
311 for (i = 0; i < 4; i++) {
312 bottom = macb_or_gem_readl(bp, SA1B + i * 8);
313 top = macb_or_gem_readl(bp, SA1T + i * 8);
315 addr[0] = bottom & 0xff;
316 addr[1] = (bottom >> 8) & 0xff;
317 addr[2] = (bottom >> 16) & 0xff;
318 addr[3] = (bottom >> 24) & 0xff;
319 addr[4] = top & 0xff;
320 addr[5] = (top >> 8) & 0xff;
322 if (is_valid_ether_addr(addr)) {
323 eth_hw_addr_set(bp->dev, addr);
328 dev_info(&bp->pdev->dev, "invalid hw address, using random\n");
329 eth_hw_addr_random(bp->dev);
332 static int macb_mdio_wait_for_idle(struct macb *bp)
336 return readx_poll_timeout(MACB_READ_NSR, bp, val, val & MACB_BIT(IDLE),
337 1, MACB_MDIO_TIMEOUT);
340 static int macb_mdio_read_c22(struct mii_bus *bus, int mii_id, int regnum)
342 struct macb *bp = bus->priv;
345 status = pm_runtime_resume_and_get(&bp->pdev->dev);
349 status = macb_mdio_wait_for_idle(bp);
353 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF)
354 | MACB_BF(RW, MACB_MAN_C22_READ)
355 | MACB_BF(PHYA, mii_id)
356 | MACB_BF(REGA, regnum)
357 | MACB_BF(CODE, MACB_MAN_C22_CODE)));
359 status = macb_mdio_wait_for_idle(bp);
363 status = MACB_BFEXT(DATA, macb_readl(bp, MAN));
366 pm_runtime_mark_last_busy(&bp->pdev->dev);
367 pm_runtime_put_autosuspend(&bp->pdev->dev);
372 static int macb_mdio_read_c45(struct mii_bus *bus, int mii_id, int devad,
375 struct macb *bp = bus->priv;
378 status = pm_runtime_get_sync(&bp->pdev->dev);
380 pm_runtime_put_noidle(&bp->pdev->dev);
384 status = macb_mdio_wait_for_idle(bp);
388 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
389 | MACB_BF(RW, MACB_MAN_C45_ADDR)
390 | MACB_BF(PHYA, mii_id)
391 | MACB_BF(REGA, devad & 0x1F)
392 | MACB_BF(DATA, regnum & 0xFFFF)
393 | MACB_BF(CODE, MACB_MAN_C45_CODE)));
395 status = macb_mdio_wait_for_idle(bp);
399 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
400 | MACB_BF(RW, MACB_MAN_C45_READ)
401 | MACB_BF(PHYA, mii_id)
402 | MACB_BF(REGA, devad & 0x1F)
403 | MACB_BF(CODE, MACB_MAN_C45_CODE)));
405 status = macb_mdio_wait_for_idle(bp);
409 status = MACB_BFEXT(DATA, macb_readl(bp, MAN));
412 pm_runtime_mark_last_busy(&bp->pdev->dev);
413 pm_runtime_put_autosuspend(&bp->pdev->dev);
418 static int macb_mdio_write_c22(struct mii_bus *bus, int mii_id, int regnum,
421 struct macb *bp = bus->priv;
424 status = pm_runtime_resume_and_get(&bp->pdev->dev);
428 status = macb_mdio_wait_for_idle(bp);
430 goto mdio_write_exit;
432 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF)
433 | MACB_BF(RW, MACB_MAN_C22_WRITE)
434 | MACB_BF(PHYA, mii_id)
435 | MACB_BF(REGA, regnum)
436 | MACB_BF(CODE, MACB_MAN_C22_CODE)
437 | MACB_BF(DATA, value)));
439 status = macb_mdio_wait_for_idle(bp);
441 goto mdio_write_exit;
444 pm_runtime_mark_last_busy(&bp->pdev->dev);
445 pm_runtime_put_autosuspend(&bp->pdev->dev);
450 static int macb_mdio_write_c45(struct mii_bus *bus, int mii_id,
451 int devad, int regnum,
454 struct macb *bp = bus->priv;
457 status = pm_runtime_get_sync(&bp->pdev->dev);
459 pm_runtime_put_noidle(&bp->pdev->dev);
463 status = macb_mdio_wait_for_idle(bp);
465 goto mdio_write_exit;
467 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
468 | MACB_BF(RW, MACB_MAN_C45_ADDR)
469 | MACB_BF(PHYA, mii_id)
470 | MACB_BF(REGA, devad & 0x1F)
471 | MACB_BF(DATA, regnum & 0xFFFF)
472 | MACB_BF(CODE, MACB_MAN_C45_CODE)));
474 status = macb_mdio_wait_for_idle(bp);
476 goto mdio_write_exit;
478 macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF)
479 | MACB_BF(RW, MACB_MAN_C45_WRITE)
480 | MACB_BF(PHYA, mii_id)
481 | MACB_BF(REGA, devad & 0x1F)
482 | MACB_BF(CODE, MACB_MAN_C45_CODE)
483 | MACB_BF(DATA, value)));
485 status = macb_mdio_wait_for_idle(bp);
487 goto mdio_write_exit;
490 pm_runtime_mark_last_busy(&bp->pdev->dev);
491 pm_runtime_put_autosuspend(&bp->pdev->dev);
496 static void macb_init_buffers(struct macb *bp)
498 struct macb_queue *queue;
501 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
502 queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma));
503 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
504 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
505 queue_writel(queue, RBQPH,
506 upper_32_bits(queue->rx_ring_dma));
508 queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
509 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
510 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
511 queue_writel(queue, TBQPH,
512 upper_32_bits(queue->tx_ring_dma));
518 * macb_set_tx_clk() - Set a clock to a new frequency
519 * @bp: pointer to struct macb
520 * @speed: New frequency in Hz
522 static void macb_set_tx_clk(struct macb *bp, int speed)
524 long ferr, rate, rate_rounded;
526 if (!bp->tx_clk || (bp->caps & MACB_CAPS_CLK_HW_CHG))
529 /* In case of MII the PHY is the clock master */
530 if (bp->phy_interface == PHY_INTERFACE_MODE_MII)
547 rate_rounded = clk_round_rate(bp->tx_clk, rate);
548 if (rate_rounded < 0)
551 /* RGMII allows 50 ppm frequency error. Test and warn if this limit
554 ferr = abs(rate_rounded - rate);
555 ferr = DIV_ROUND_UP(ferr, rate / 100000);
558 "unable to generate target frequency: %ld Hz\n",
561 if (clk_set_rate(bp->tx_clk, rate_rounded))
562 netdev_err(bp->dev, "adjusting tx_clk failed.\n");
565 static void macb_usx_pcs_link_up(struct phylink_pcs *pcs, unsigned int neg_mode,
566 phy_interface_t interface, int speed,
569 struct macb *bp = container_of(pcs, struct macb, phylink_usx_pcs);
572 config = gem_readl(bp, USX_CONTROL);
573 config = GEM_BFINS(SERDES_RATE, MACB_SERDES_RATE_10G, config);
574 config = GEM_BFINS(USX_CTRL_SPEED, HS_SPEED_10000M, config);
575 config &= ~(GEM_BIT(TX_SCR_BYPASS) | GEM_BIT(RX_SCR_BYPASS));
576 config |= GEM_BIT(TX_EN);
577 gem_writel(bp, USX_CONTROL, config);
580 static void macb_usx_pcs_get_state(struct phylink_pcs *pcs,
581 struct phylink_link_state *state)
583 struct macb *bp = container_of(pcs, struct macb, phylink_usx_pcs);
586 state->speed = SPEED_10000;
588 state->an_complete = 1;
590 val = gem_readl(bp, USX_STATUS);
591 state->link = !!(val & GEM_BIT(USX_BLOCK_LOCK));
592 val = gem_readl(bp, NCFGR);
593 if (val & GEM_BIT(PAE))
594 state->pause = MLO_PAUSE_RX;
597 static int macb_usx_pcs_config(struct phylink_pcs *pcs,
598 unsigned int neg_mode,
599 phy_interface_t interface,
600 const unsigned long *advertising,
601 bool permit_pause_to_mac)
603 struct macb *bp = container_of(pcs, struct macb, phylink_usx_pcs);
605 gem_writel(bp, USX_CONTROL, gem_readl(bp, USX_CONTROL) |
611 static void macb_pcs_get_state(struct phylink_pcs *pcs,
612 struct phylink_link_state *state)
617 static void macb_pcs_an_restart(struct phylink_pcs *pcs)
622 static int macb_pcs_config(struct phylink_pcs *pcs,
623 unsigned int neg_mode,
624 phy_interface_t interface,
625 const unsigned long *advertising,
626 bool permit_pause_to_mac)
631 static const struct phylink_pcs_ops macb_phylink_usx_pcs_ops = {
632 .pcs_get_state = macb_usx_pcs_get_state,
633 .pcs_config = macb_usx_pcs_config,
634 .pcs_link_up = macb_usx_pcs_link_up,
637 static const struct phylink_pcs_ops macb_phylink_pcs_ops = {
638 .pcs_get_state = macb_pcs_get_state,
639 .pcs_an_restart = macb_pcs_an_restart,
640 .pcs_config = macb_pcs_config,
643 static void macb_mac_config(struct phylink_config *config, unsigned int mode,
644 const struct phylink_link_state *state)
646 struct net_device *ndev = to_net_dev(config->dev);
647 struct macb *bp = netdev_priv(ndev);
652 spin_lock_irqsave(&bp->lock, flags);
654 old_ctrl = ctrl = macb_or_gem_readl(bp, NCFGR);
655 old_ncr = ncr = macb_or_gem_readl(bp, NCR);
657 if (bp->caps & MACB_CAPS_MACB_IS_EMAC) {
658 if (state->interface == PHY_INTERFACE_MODE_RMII)
659 ctrl |= MACB_BIT(RM9200_RMII);
660 } else if (macb_is_gem(bp)) {
661 ctrl &= ~(GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL));
662 ncr &= ~GEM_BIT(ENABLE_HS_MAC);
664 if (state->interface == PHY_INTERFACE_MODE_SGMII) {
665 ctrl |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
666 } else if (state->interface == PHY_INTERFACE_MODE_10GBASER) {
667 ctrl |= GEM_BIT(PCSSEL);
668 ncr |= GEM_BIT(ENABLE_HS_MAC);
669 } else if (bp->caps & MACB_CAPS_MIIONRGMII &&
670 bp->phy_interface == PHY_INTERFACE_MODE_MII) {
671 ncr |= MACB_BIT(MIIONRGMII);
675 /* Apply the new configuration, if any */
677 macb_or_gem_writel(bp, NCFGR, ctrl);
680 macb_or_gem_writel(bp, NCR, ncr);
682 /* Disable AN for SGMII fixed link configuration, enable otherwise.
683 * Must be written after PCSSEL is set in NCFGR,
684 * otherwise writes will not take effect.
686 if (macb_is_gem(bp) && state->interface == PHY_INTERFACE_MODE_SGMII) {
687 u32 pcsctrl, old_pcsctrl;
689 old_pcsctrl = gem_readl(bp, PCSCNTRL);
690 if (mode == MLO_AN_FIXED)
691 pcsctrl = old_pcsctrl & ~GEM_BIT(PCSAUTONEG);
693 pcsctrl = old_pcsctrl | GEM_BIT(PCSAUTONEG);
694 if (old_pcsctrl != pcsctrl)
695 gem_writel(bp, PCSCNTRL, pcsctrl);
698 spin_unlock_irqrestore(&bp->lock, flags);
701 static void macb_mac_link_down(struct phylink_config *config, unsigned int mode,
702 phy_interface_t interface)
704 struct net_device *ndev = to_net_dev(config->dev);
705 struct macb *bp = netdev_priv(ndev);
706 struct macb_queue *queue;
710 if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC))
711 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
712 queue_writel(queue, IDR,
713 bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP));
715 /* Disable Rx and Tx */
716 ctrl = macb_readl(bp, NCR) & ~(MACB_BIT(RE) | MACB_BIT(TE));
717 macb_writel(bp, NCR, ctrl);
719 netif_tx_stop_all_queues(ndev);
722 static void macb_mac_link_up(struct phylink_config *config,
723 struct phy_device *phy,
724 unsigned int mode, phy_interface_t interface,
725 int speed, int duplex,
726 bool tx_pause, bool rx_pause)
728 struct net_device *ndev = to_net_dev(config->dev);
729 struct macb *bp = netdev_priv(ndev);
730 struct macb_queue *queue;
735 spin_lock_irqsave(&bp->lock, flags);
737 ctrl = macb_or_gem_readl(bp, NCFGR);
739 ctrl &= ~(MACB_BIT(SPD) | MACB_BIT(FD));
741 if (speed == SPEED_100)
742 ctrl |= MACB_BIT(SPD);
745 ctrl |= MACB_BIT(FD);
747 if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC)) {
748 ctrl &= ~MACB_BIT(PAE);
749 if (macb_is_gem(bp)) {
750 ctrl &= ~GEM_BIT(GBE);
752 if (speed == SPEED_1000)
753 ctrl |= GEM_BIT(GBE);
757 ctrl |= MACB_BIT(PAE);
759 /* Initialize rings & buffers as clearing MACB_BIT(TE) in link down
760 * cleared the pipeline and control registers.
762 bp->macbgem_ops.mog_init_rings(bp);
763 macb_init_buffers(bp);
765 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
766 queue_writel(queue, IER,
767 bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP));
770 macb_or_gem_writel(bp, NCFGR, ctrl);
772 if (bp->phy_interface == PHY_INTERFACE_MODE_10GBASER)
773 gem_writel(bp, HS_MAC_CONFIG, GEM_BFINS(HS_MAC_SPEED, HS_SPEED_10000M,
774 gem_readl(bp, HS_MAC_CONFIG)));
776 spin_unlock_irqrestore(&bp->lock, flags);
778 if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC))
779 macb_set_tx_clk(bp, speed);
781 /* Enable Rx and Tx; Enable PTP unicast */
782 ctrl = macb_readl(bp, NCR);
784 ctrl |= MACB_BIT(PTPUNI);
786 macb_writel(bp, NCR, ctrl | MACB_BIT(RE) | MACB_BIT(TE));
788 netif_tx_wake_all_queues(ndev);
791 static struct phylink_pcs *macb_mac_select_pcs(struct phylink_config *config,
792 phy_interface_t interface)
794 struct net_device *ndev = to_net_dev(config->dev);
795 struct macb *bp = netdev_priv(ndev);
797 if (interface == PHY_INTERFACE_MODE_10GBASER)
798 return &bp->phylink_usx_pcs;
799 else if (interface == PHY_INTERFACE_MODE_SGMII)
800 return &bp->phylink_sgmii_pcs;
805 static const struct phylink_mac_ops macb_phylink_ops = {
806 .mac_select_pcs = macb_mac_select_pcs,
807 .mac_config = macb_mac_config,
808 .mac_link_down = macb_mac_link_down,
809 .mac_link_up = macb_mac_link_up,
812 static bool macb_phy_handle_exists(struct device_node *dn)
814 dn = of_parse_phandle(dn, "phy-handle", 0);
819 static int macb_phylink_connect(struct macb *bp)
821 struct device_node *dn = bp->pdev->dev.of_node;
822 struct net_device *dev = bp->dev;
823 struct phy_device *phydev;
827 ret = phylink_of_phy_connect(bp->phylink, dn, 0);
829 if (!dn || (ret && !macb_phy_handle_exists(dn))) {
830 phydev = phy_find_first(bp->mii_bus);
832 netdev_err(dev, "no PHY found\n");
836 /* attach the mac to the phy */
837 ret = phylink_connect_phy(bp->phylink, phydev);
841 netdev_err(dev, "Could not attach PHY (%d)\n", ret);
845 phylink_start(bp->phylink);
850 static void macb_get_pcs_fixed_state(struct phylink_config *config,
851 struct phylink_link_state *state)
853 struct net_device *ndev = to_net_dev(config->dev);
854 struct macb *bp = netdev_priv(ndev);
856 state->link = (macb_readl(bp, NSR) & MACB_BIT(NSR_LINK)) != 0;
859 /* based on au1000_eth. c*/
860 static int macb_mii_probe(struct net_device *dev)
862 struct macb *bp = netdev_priv(dev);
864 bp->phylink_sgmii_pcs.ops = &macb_phylink_pcs_ops;
865 bp->phylink_sgmii_pcs.neg_mode = true;
866 bp->phylink_usx_pcs.ops = &macb_phylink_usx_pcs_ops;
867 bp->phylink_usx_pcs.neg_mode = true;
869 bp->phylink_config.dev = &dev->dev;
870 bp->phylink_config.type = PHYLINK_NETDEV;
871 bp->phylink_config.mac_managed_pm = true;
873 if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) {
874 bp->phylink_config.poll_fixed_state = true;
875 bp->phylink_config.get_fixed_state = macb_get_pcs_fixed_state;
878 bp->phylink_config.mac_capabilities = MAC_ASYM_PAUSE |
881 __set_bit(PHY_INTERFACE_MODE_MII,
882 bp->phylink_config.supported_interfaces);
883 __set_bit(PHY_INTERFACE_MODE_RMII,
884 bp->phylink_config.supported_interfaces);
886 /* Determine what modes are supported */
887 if (macb_is_gem(bp) && (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)) {
888 bp->phylink_config.mac_capabilities |= MAC_1000FD;
889 if (!(bp->caps & MACB_CAPS_NO_GIGABIT_HALF))
890 bp->phylink_config.mac_capabilities |= MAC_1000HD;
892 __set_bit(PHY_INTERFACE_MODE_GMII,
893 bp->phylink_config.supported_interfaces);
894 phy_interface_set_rgmii(bp->phylink_config.supported_interfaces);
896 if (bp->caps & MACB_CAPS_PCS)
897 __set_bit(PHY_INTERFACE_MODE_SGMII,
898 bp->phylink_config.supported_interfaces);
900 if (bp->caps & MACB_CAPS_HIGH_SPEED) {
901 __set_bit(PHY_INTERFACE_MODE_10GBASER,
902 bp->phylink_config.supported_interfaces);
903 bp->phylink_config.mac_capabilities |= MAC_10000FD;
907 bp->phylink = phylink_create(&bp->phylink_config, bp->pdev->dev.fwnode,
908 bp->phy_interface, &macb_phylink_ops);
909 if (IS_ERR(bp->phylink)) {
910 netdev_err(dev, "Could not create a phylink instance (%ld)\n",
911 PTR_ERR(bp->phylink));
912 return PTR_ERR(bp->phylink);
918 static int macb_mdiobus_register(struct macb *bp)
920 struct device_node *child, *np = bp->pdev->dev.of_node;
922 /* If we have a child named mdio, probe it instead of looking for PHYs
923 * directly under the MAC node
925 child = of_get_child_by_name(np, "mdio");
927 int ret = of_mdiobus_register(bp->mii_bus, child);
933 if (of_phy_is_fixed_link(np))
934 return mdiobus_register(bp->mii_bus);
936 /* Only create the PHY from the device tree if at least one PHY is
937 * described. Otherwise scan the entire MDIO bus. We do this to support
938 * old device tree that did not follow the best practices and did not
939 * describe their network PHYs.
941 for_each_available_child_of_node(np, child)
942 if (of_mdiobus_child_is_phy(child)) {
943 /* The loop increments the child refcount,
944 * decrement it before returning.
948 return of_mdiobus_register(bp->mii_bus, np);
951 return mdiobus_register(bp->mii_bus);
954 static int macb_mii_init(struct macb *bp)
958 /* Enable management port */
959 macb_writel(bp, NCR, MACB_BIT(MPE));
961 bp->mii_bus = mdiobus_alloc();
967 bp->mii_bus->name = "MACB_mii_bus";
968 bp->mii_bus->read = &macb_mdio_read_c22;
969 bp->mii_bus->write = &macb_mdio_write_c22;
970 bp->mii_bus->read_c45 = &macb_mdio_read_c45;
971 bp->mii_bus->write_c45 = &macb_mdio_write_c45;
972 snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x",
973 bp->pdev->name, bp->pdev->id);
974 bp->mii_bus->priv = bp;
975 bp->mii_bus->parent = &bp->pdev->dev;
977 dev_set_drvdata(&bp->dev->dev, bp->mii_bus);
979 err = macb_mdiobus_register(bp);
981 goto err_out_free_mdiobus;
983 err = macb_mii_probe(bp->dev);
985 goto err_out_unregister_bus;
989 err_out_unregister_bus:
990 mdiobus_unregister(bp->mii_bus);
991 err_out_free_mdiobus:
992 mdiobus_free(bp->mii_bus);
997 static void macb_update_stats(struct macb *bp)
999 u32 *p = &bp->hw_stats.macb.rx_pause_frames;
1000 u32 *end = &bp->hw_stats.macb.tx_pause_frames + 1;
1001 int offset = MACB_PFR;
1003 WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4);
1005 for (; p < end; p++, offset += 4)
1006 *p += bp->macb_reg_readl(bp, offset);
1009 static int macb_halt_tx(struct macb *bp)
1011 unsigned long halt_time, timeout;
1014 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(THALT));
1016 timeout = jiffies + usecs_to_jiffies(MACB_HALT_TIMEOUT);
1018 halt_time = jiffies;
1019 status = macb_readl(bp, TSR);
1020 if (!(status & MACB_BIT(TGO)))
1024 } while (time_before(halt_time, timeout));
1029 static void macb_tx_unmap(struct macb *bp, struct macb_tx_skb *tx_skb, int budget)
1031 if (tx_skb->mapping) {
1032 if (tx_skb->mapped_as_page)
1033 dma_unmap_page(&bp->pdev->dev, tx_skb->mapping,
1034 tx_skb->size, DMA_TO_DEVICE);
1036 dma_unmap_single(&bp->pdev->dev, tx_skb->mapping,
1037 tx_skb->size, DMA_TO_DEVICE);
1038 tx_skb->mapping = 0;
1042 napi_consume_skb(tx_skb->skb, budget);
1047 static void macb_set_addr(struct macb *bp, struct macb_dma_desc *desc, dma_addr_t addr)
1049 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
1050 struct macb_dma_desc_64 *desc_64;
1052 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
1053 desc_64 = macb_64b_desc(bp, desc);
1054 desc_64->addrh = upper_32_bits(addr);
1055 /* The low bits of RX address contain the RX_USED bit, clearing
1056 * of which allows packet RX. Make sure the high bits are also
1057 * visible to HW at that point.
1062 desc->addr = lower_32_bits(addr);
1065 static dma_addr_t macb_get_addr(struct macb *bp, struct macb_dma_desc *desc)
1067 dma_addr_t addr = 0;
1068 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
1069 struct macb_dma_desc_64 *desc_64;
1071 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
1072 desc_64 = macb_64b_desc(bp, desc);
1073 addr = ((u64)(desc_64->addrh) << 32);
1076 addr |= MACB_BF(RX_WADDR, MACB_BFEXT(RX_WADDR, desc->addr));
1077 #ifdef CONFIG_MACB_USE_HWSTAMP
1078 if (bp->hw_dma_cap & HW_DMA_CAP_PTP)
1079 addr &= ~GEM_BIT(DMA_RXVALID);
1084 static void macb_tx_error_task(struct work_struct *work)
1086 struct macb_queue *queue = container_of(work, struct macb_queue,
1088 bool halt_timeout = false;
1089 struct macb *bp = queue->bp;
1090 struct macb_tx_skb *tx_skb;
1091 struct macb_dma_desc *desc;
1092 struct sk_buff *skb;
1094 unsigned long flags;
1096 netdev_vdbg(bp->dev, "macb_tx_error_task: q = %u, t = %u, h = %u\n",
1097 (unsigned int)(queue - bp->queues),
1098 queue->tx_tail, queue->tx_head);
1100 /* Prevent the queue NAPI TX poll from running, as it calls
1101 * macb_tx_complete(), which in turn may call netif_wake_subqueue().
1102 * As explained below, we have to halt the transmission before updating
1103 * TBQP registers so we call netif_tx_stop_all_queues() to notify the
1104 * network engine about the macb/gem being halted.
1106 napi_disable(&queue->napi_tx);
1107 spin_lock_irqsave(&bp->lock, flags);
1109 /* Make sure nobody is trying to queue up new packets */
1110 netif_tx_stop_all_queues(bp->dev);
1112 /* Stop transmission now
1113 * (in case we have just queued new packets)
1114 * macb/gem must be halted to write TBQP register
1116 if (macb_halt_tx(bp)) {
1117 netdev_err(bp->dev, "BUG: halt tx timed out\n");
1118 macb_writel(bp, NCR, macb_readl(bp, NCR) & (~MACB_BIT(TE)));
1119 halt_timeout = true;
1122 /* Treat frames in TX queue including the ones that caused the error.
1123 * Free transmit buffers in upper layer.
1125 for (tail = queue->tx_tail; tail != queue->tx_head; tail++) {
1128 desc = macb_tx_desc(queue, tail);
1130 tx_skb = macb_tx_skb(queue, tail);
1133 if (ctrl & MACB_BIT(TX_USED)) {
1134 /* skb is set for the last buffer of the frame */
1136 macb_tx_unmap(bp, tx_skb, 0);
1138 tx_skb = macb_tx_skb(queue, tail);
1142 /* ctrl still refers to the first buffer descriptor
1143 * since it's the only one written back by the hardware
1145 if (!(ctrl & MACB_BIT(TX_BUF_EXHAUSTED))) {
1146 netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n",
1147 macb_tx_ring_wrap(bp, tail),
1149 bp->dev->stats.tx_packets++;
1150 queue->stats.tx_packets++;
1151 bp->dev->stats.tx_bytes += skb->len;
1152 queue->stats.tx_bytes += skb->len;
1155 /* "Buffers exhausted mid-frame" errors may only happen
1156 * if the driver is buggy, so complain loudly about
1157 * those. Statistics are updated by hardware.
1159 if (ctrl & MACB_BIT(TX_BUF_EXHAUSTED))
1161 "BUG: TX buffers exhausted mid-frame\n");
1163 desc->ctrl = ctrl | MACB_BIT(TX_USED);
1166 macb_tx_unmap(bp, tx_skb, 0);
1169 /* Set end of TX queue */
1170 desc = macb_tx_desc(queue, 0);
1171 macb_set_addr(bp, desc, 0);
1172 desc->ctrl = MACB_BIT(TX_USED);
1174 /* Make descriptor updates visible to hardware */
1177 /* Reinitialize the TX desc queue */
1178 queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma));
1179 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
1180 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
1181 queue_writel(queue, TBQPH, upper_32_bits(queue->tx_ring_dma));
1183 /* Make TX ring reflect state of hardware */
1187 /* Housework before enabling TX IRQ */
1188 macb_writel(bp, TSR, macb_readl(bp, TSR));
1189 queue_writel(queue, IER, MACB_TX_INT_FLAGS);
1192 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TE));
1194 /* Now we are ready to start transmission again */
1195 netif_tx_start_all_queues(bp->dev);
1196 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
1198 spin_unlock_irqrestore(&bp->lock, flags);
1199 napi_enable(&queue->napi_tx);
1202 static bool ptp_one_step_sync(struct sk_buff *skb)
1204 struct ptp_header *hdr;
1205 unsigned int ptp_class;
1208 /* No need to parse packet if PTP TS is not involved */
1209 if (likely(!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP)))
1212 /* Identify and return whether PTP one step sync is being processed */
1213 ptp_class = ptp_classify_raw(skb);
1214 if (ptp_class == PTP_CLASS_NONE)
1217 hdr = ptp_parse_header(skb, ptp_class);
1221 if (hdr->flag_field[0] & PTP_FLAG_TWOSTEP)
1224 msgtype = ptp_get_msgtype(hdr, ptp_class);
1225 if (msgtype == PTP_MSGTYPE_SYNC)
1232 static int macb_tx_complete(struct macb_queue *queue, int budget)
1234 struct macb *bp = queue->bp;
1235 u16 queue_index = queue - bp->queues;
1240 spin_lock(&queue->tx_ptr_lock);
1241 head = queue->tx_head;
1242 for (tail = queue->tx_tail; tail != head && packets < budget; tail++) {
1243 struct macb_tx_skb *tx_skb;
1244 struct sk_buff *skb;
1245 struct macb_dma_desc *desc;
1248 desc = macb_tx_desc(queue, tail);
1250 /* Make hw descriptor updates visible to CPU */
1255 /* TX_USED bit is only set by hardware on the very first buffer
1256 * descriptor of the transmitted frame.
1258 if (!(ctrl & MACB_BIT(TX_USED)))
1261 /* Process all buffers of the current transmitted frame */
1263 tx_skb = macb_tx_skb(queue, tail);
1266 /* First, update TX stats if needed */
1268 if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
1269 !ptp_one_step_sync(skb))
1270 gem_ptp_do_txstamp(bp, skb, desc);
1272 netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n",
1273 macb_tx_ring_wrap(bp, tail),
1275 bp->dev->stats.tx_packets++;
1276 queue->stats.tx_packets++;
1277 bp->dev->stats.tx_bytes += skb->len;
1278 queue->stats.tx_bytes += skb->len;
1282 /* Now we can safely release resources */
1283 macb_tx_unmap(bp, tx_skb, budget);
1285 /* skb is set only for the last buffer of the frame.
1286 * WARNING: at this point skb has been freed by
1294 queue->tx_tail = tail;
1295 if (__netif_subqueue_stopped(bp->dev, queue_index) &&
1296 CIRC_CNT(queue->tx_head, queue->tx_tail,
1297 bp->tx_ring_size) <= MACB_TX_WAKEUP_THRESH(bp))
1298 netif_wake_subqueue(bp->dev, queue_index);
1299 spin_unlock(&queue->tx_ptr_lock);
1304 static void gem_rx_refill(struct macb_queue *queue)
1307 struct sk_buff *skb;
1309 struct macb *bp = queue->bp;
1310 struct macb_dma_desc *desc;
1312 while (CIRC_SPACE(queue->rx_prepared_head, queue->rx_tail,
1313 bp->rx_ring_size) > 0) {
1314 entry = macb_rx_ring_wrap(bp, queue->rx_prepared_head);
1316 /* Make hw descriptor updates visible to CPU */
1319 desc = macb_rx_desc(queue, entry);
1321 if (!queue->rx_skbuff[entry]) {
1322 /* allocate sk_buff for this free entry in ring */
1323 skb = netdev_alloc_skb(bp->dev, bp->rx_buffer_size);
1324 if (unlikely(!skb)) {
1326 "Unable to allocate sk_buff\n");
1330 /* now fill corresponding descriptor entry */
1331 paddr = dma_map_single(&bp->pdev->dev, skb->data,
1334 if (dma_mapping_error(&bp->pdev->dev, paddr)) {
1339 queue->rx_skbuff[entry] = skb;
1341 if (entry == bp->rx_ring_size - 1)
1342 paddr |= MACB_BIT(RX_WRAP);
1344 /* Setting addr clears RX_USED and allows reception,
1345 * make sure ctrl is cleared first to avoid a race.
1348 macb_set_addr(bp, desc, paddr);
1350 /* properly align Ethernet header */
1351 skb_reserve(skb, NET_IP_ALIGN);
1355 desc->addr &= ~MACB_BIT(RX_USED);
1357 queue->rx_prepared_head++;
1360 /* Make descriptor updates visible to hardware */
1363 netdev_vdbg(bp->dev, "rx ring: queue: %p, prepared head %d, tail %d\n",
1364 queue, queue->rx_prepared_head, queue->rx_tail);
1367 /* Mark DMA descriptors from begin up to and not including end as unused */
1368 static void discard_partial_frame(struct macb_queue *queue, unsigned int begin,
1373 for (frag = begin; frag != end; frag++) {
1374 struct macb_dma_desc *desc = macb_rx_desc(queue, frag);
1376 desc->addr &= ~MACB_BIT(RX_USED);
1379 /* Make descriptor updates visible to hardware */
1382 /* When this happens, the hardware stats registers for
1383 * whatever caused this is updated, so we don't have to record
1388 static int gem_rx(struct macb_queue *queue, struct napi_struct *napi,
1391 struct macb *bp = queue->bp;
1394 struct sk_buff *skb;
1395 struct macb_dma_desc *desc;
1398 while (count < budget) {
1403 entry = macb_rx_ring_wrap(bp, queue->rx_tail);
1404 desc = macb_rx_desc(queue, entry);
1406 /* Make hw descriptor updates visible to CPU */
1409 rxused = (desc->addr & MACB_BIT(RX_USED)) ? true : false;
1410 addr = macb_get_addr(bp, desc);
1415 /* Ensure ctrl is at least as up-to-date as rxused */
1423 if (!(ctrl & MACB_BIT(RX_SOF) && ctrl & MACB_BIT(RX_EOF))) {
1425 "not whole frame pointed by descriptor\n");
1426 bp->dev->stats.rx_dropped++;
1427 queue->stats.rx_dropped++;
1430 skb = queue->rx_skbuff[entry];
1431 if (unlikely(!skb)) {
1433 "inconsistent Rx descriptor chain\n");
1434 bp->dev->stats.rx_dropped++;
1435 queue->stats.rx_dropped++;
1438 /* now everything is ready for receiving packet */
1439 queue->rx_skbuff[entry] = NULL;
1440 len = ctrl & bp->rx_frm_len_mask;
1442 netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len);
1445 dma_unmap_single(&bp->pdev->dev, addr,
1446 bp->rx_buffer_size, DMA_FROM_DEVICE);
1448 skb->protocol = eth_type_trans(skb, bp->dev);
1449 skb_checksum_none_assert(skb);
1450 if (bp->dev->features & NETIF_F_RXCSUM &&
1451 !(bp->dev->flags & IFF_PROMISC) &&
1452 GEM_BFEXT(RX_CSUM, ctrl) & GEM_RX_CSUM_CHECKED_MASK)
1453 skb->ip_summed = CHECKSUM_UNNECESSARY;
1455 bp->dev->stats.rx_packets++;
1456 queue->stats.rx_packets++;
1457 bp->dev->stats.rx_bytes += skb->len;
1458 queue->stats.rx_bytes += skb->len;
1460 gem_ptp_do_rxstamp(bp, skb, desc);
1462 #if defined(DEBUG) && defined(VERBOSE_DEBUG)
1463 netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
1464 skb->len, skb->csum);
1465 print_hex_dump(KERN_DEBUG, " mac: ", DUMP_PREFIX_ADDRESS, 16, 1,
1466 skb_mac_header(skb), 16, true);
1467 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_ADDRESS, 16, 1,
1468 skb->data, 32, true);
1471 napi_gro_receive(napi, skb);
1474 gem_rx_refill(queue);
1479 static int macb_rx_frame(struct macb_queue *queue, struct napi_struct *napi,
1480 unsigned int first_frag, unsigned int last_frag)
1484 unsigned int offset;
1485 struct sk_buff *skb;
1486 struct macb_dma_desc *desc;
1487 struct macb *bp = queue->bp;
1489 desc = macb_rx_desc(queue, last_frag);
1490 len = desc->ctrl & bp->rx_frm_len_mask;
1492 netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n",
1493 macb_rx_ring_wrap(bp, first_frag),
1494 macb_rx_ring_wrap(bp, last_frag), len);
1496 /* The ethernet header starts NET_IP_ALIGN bytes into the
1497 * first buffer. Since the header is 14 bytes, this makes the
1498 * payload word-aligned.
1500 * Instead of calling skb_reserve(NET_IP_ALIGN), we just copy
1501 * the two padding bytes into the skb so that we avoid hitting
1502 * the slowpath in memcpy(), and pull them off afterwards.
1504 skb = netdev_alloc_skb(bp->dev, len + NET_IP_ALIGN);
1506 bp->dev->stats.rx_dropped++;
1507 for (frag = first_frag; ; frag++) {
1508 desc = macb_rx_desc(queue, frag);
1509 desc->addr &= ~MACB_BIT(RX_USED);
1510 if (frag == last_frag)
1514 /* Make descriptor updates visible to hardware */
1521 len += NET_IP_ALIGN;
1522 skb_checksum_none_assert(skb);
1525 for (frag = first_frag; ; frag++) {
1526 unsigned int frag_len = bp->rx_buffer_size;
1528 if (offset + frag_len > len) {
1529 if (unlikely(frag != last_frag)) {
1530 dev_kfree_skb_any(skb);
1533 frag_len = len - offset;
1535 skb_copy_to_linear_data_offset(skb, offset,
1536 macb_rx_buffer(queue, frag),
1538 offset += bp->rx_buffer_size;
1539 desc = macb_rx_desc(queue, frag);
1540 desc->addr &= ~MACB_BIT(RX_USED);
1542 if (frag == last_frag)
1546 /* Make descriptor updates visible to hardware */
1549 __skb_pull(skb, NET_IP_ALIGN);
1550 skb->protocol = eth_type_trans(skb, bp->dev);
1552 bp->dev->stats.rx_packets++;
1553 bp->dev->stats.rx_bytes += skb->len;
1554 netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n",
1555 skb->len, skb->csum);
1556 napi_gro_receive(napi, skb);
1561 static inline void macb_init_rx_ring(struct macb_queue *queue)
1563 struct macb *bp = queue->bp;
1565 struct macb_dma_desc *desc = NULL;
1568 addr = queue->rx_buffers_dma;
1569 for (i = 0; i < bp->rx_ring_size; i++) {
1570 desc = macb_rx_desc(queue, i);
1571 macb_set_addr(bp, desc, addr);
1573 addr += bp->rx_buffer_size;
1575 desc->addr |= MACB_BIT(RX_WRAP);
1579 static int macb_rx(struct macb_queue *queue, struct napi_struct *napi,
1582 struct macb *bp = queue->bp;
1583 bool reset_rx_queue = false;
1586 int first_frag = -1;
1588 for (tail = queue->rx_tail; budget > 0; tail++) {
1589 struct macb_dma_desc *desc = macb_rx_desc(queue, tail);
1592 /* Make hw descriptor updates visible to CPU */
1595 if (!(desc->addr & MACB_BIT(RX_USED)))
1598 /* Ensure ctrl is at least as up-to-date as addr */
1603 if (ctrl & MACB_BIT(RX_SOF)) {
1604 if (first_frag != -1)
1605 discard_partial_frame(queue, first_frag, tail);
1609 if (ctrl & MACB_BIT(RX_EOF)) {
1612 if (unlikely(first_frag == -1)) {
1613 reset_rx_queue = true;
1617 dropped = macb_rx_frame(queue, napi, first_frag, tail);
1619 if (unlikely(dropped < 0)) {
1620 reset_rx_queue = true;
1630 if (unlikely(reset_rx_queue)) {
1631 unsigned long flags;
1634 netdev_err(bp->dev, "RX queue corruption: reset it\n");
1636 spin_lock_irqsave(&bp->lock, flags);
1638 ctrl = macb_readl(bp, NCR);
1639 macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE));
1641 macb_init_rx_ring(queue);
1642 queue_writel(queue, RBQP, queue->rx_ring_dma);
1644 macb_writel(bp, NCR, ctrl | MACB_BIT(RE));
1646 spin_unlock_irqrestore(&bp->lock, flags);
1650 if (first_frag != -1)
1651 queue->rx_tail = first_frag;
1653 queue->rx_tail = tail;
1658 static bool macb_rx_pending(struct macb_queue *queue)
1660 struct macb *bp = queue->bp;
1662 struct macb_dma_desc *desc;
1664 entry = macb_rx_ring_wrap(bp, queue->rx_tail);
1665 desc = macb_rx_desc(queue, entry);
1667 /* Make hw descriptor updates visible to CPU */
1670 return (desc->addr & MACB_BIT(RX_USED)) != 0;
1673 static int macb_rx_poll(struct napi_struct *napi, int budget)
1675 struct macb_queue *queue = container_of(napi, struct macb_queue, napi_rx);
1676 struct macb *bp = queue->bp;
1679 work_done = bp->macbgem_ops.mog_rx(queue, napi, budget);
1681 netdev_vdbg(bp->dev, "RX poll: queue = %u, work_done = %d, budget = %d\n",
1682 (unsigned int)(queue - bp->queues), work_done, budget);
1684 if (work_done < budget && napi_complete_done(napi, work_done)) {
1685 queue_writel(queue, IER, bp->rx_intr_mask);
1687 /* Packet completions only seem to propagate to raise
1688 * interrupts when interrupts are enabled at the time, so if
1689 * packets were received while interrupts were disabled,
1690 * they will not cause another interrupt to be generated when
1691 * interrupts are re-enabled.
1692 * Check for this case here to avoid losing a wakeup. This can
1693 * potentially race with the interrupt handler doing the same
1694 * actions if an interrupt is raised just after enabling them,
1695 * but this should be harmless.
1697 if (macb_rx_pending(queue)) {
1698 queue_writel(queue, IDR, bp->rx_intr_mask);
1699 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1700 queue_writel(queue, ISR, MACB_BIT(RCOMP));
1701 netdev_vdbg(bp->dev, "poll: packets pending, reschedule\n");
1702 napi_schedule(napi);
1706 /* TODO: Handle errors */
1711 static void macb_tx_restart(struct macb_queue *queue)
1713 struct macb *bp = queue->bp;
1714 unsigned int head_idx, tbqp;
1716 spin_lock(&queue->tx_ptr_lock);
1718 if (queue->tx_head == queue->tx_tail)
1719 goto out_tx_ptr_unlock;
1721 tbqp = queue_readl(queue, TBQP) / macb_dma_desc_get_size(bp);
1722 tbqp = macb_adj_dma_desc_idx(bp, macb_tx_ring_wrap(bp, tbqp));
1723 head_idx = macb_adj_dma_desc_idx(bp, macb_tx_ring_wrap(bp, queue->tx_head));
1725 if (tbqp == head_idx)
1726 goto out_tx_ptr_unlock;
1728 spin_lock_irq(&bp->lock);
1729 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
1730 spin_unlock_irq(&bp->lock);
1733 spin_unlock(&queue->tx_ptr_lock);
1736 static bool macb_tx_complete_pending(struct macb_queue *queue)
1738 bool retval = false;
1740 spin_lock(&queue->tx_ptr_lock);
1741 if (queue->tx_head != queue->tx_tail) {
1742 /* Make hw descriptor updates visible to CPU */
1745 if (macb_tx_desc(queue, queue->tx_tail)->ctrl & MACB_BIT(TX_USED))
1748 spin_unlock(&queue->tx_ptr_lock);
1752 static int macb_tx_poll(struct napi_struct *napi, int budget)
1754 struct macb_queue *queue = container_of(napi, struct macb_queue, napi_tx);
1755 struct macb *bp = queue->bp;
1758 work_done = macb_tx_complete(queue, budget);
1760 rmb(); // ensure txubr_pending is up to date
1761 if (queue->txubr_pending) {
1762 queue->txubr_pending = false;
1763 netdev_vdbg(bp->dev, "poll: tx restart\n");
1764 macb_tx_restart(queue);
1767 netdev_vdbg(bp->dev, "TX poll: queue = %u, work_done = %d, budget = %d\n",
1768 (unsigned int)(queue - bp->queues), work_done, budget);
1770 if (work_done < budget && napi_complete_done(napi, work_done)) {
1771 queue_writel(queue, IER, MACB_BIT(TCOMP));
1773 /* Packet completions only seem to propagate to raise
1774 * interrupts when interrupts are enabled at the time, so if
1775 * packets were sent while interrupts were disabled,
1776 * they will not cause another interrupt to be generated when
1777 * interrupts are re-enabled.
1778 * Check for this case here to avoid losing a wakeup. This can
1779 * potentially race with the interrupt handler doing the same
1780 * actions if an interrupt is raised just after enabling them,
1781 * but this should be harmless.
1783 if (macb_tx_complete_pending(queue)) {
1784 queue_writel(queue, IDR, MACB_BIT(TCOMP));
1785 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1786 queue_writel(queue, ISR, MACB_BIT(TCOMP));
1787 netdev_vdbg(bp->dev, "TX poll: packets pending, reschedule\n");
1788 napi_schedule(napi);
1795 static void macb_hresp_error_task(struct tasklet_struct *t)
1797 struct macb *bp = from_tasklet(bp, t, hresp_err_tasklet);
1798 struct net_device *dev = bp->dev;
1799 struct macb_queue *queue;
1803 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
1804 queue_writel(queue, IDR, bp->rx_intr_mask |
1808 ctrl = macb_readl(bp, NCR);
1809 ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE));
1810 macb_writel(bp, NCR, ctrl);
1812 netif_tx_stop_all_queues(dev);
1813 netif_carrier_off(dev);
1815 bp->macbgem_ops.mog_init_rings(bp);
1817 /* Initialize TX and RX buffers */
1818 macb_init_buffers(bp);
1820 /* Enable interrupts */
1821 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
1822 queue_writel(queue, IER,
1827 ctrl |= MACB_BIT(RE) | MACB_BIT(TE);
1828 macb_writel(bp, NCR, ctrl);
1830 netif_carrier_on(dev);
1831 netif_tx_start_all_queues(dev);
1834 static irqreturn_t macb_wol_interrupt(int irq, void *dev_id)
1836 struct macb_queue *queue = dev_id;
1837 struct macb *bp = queue->bp;
1840 status = queue_readl(queue, ISR);
1842 if (unlikely(!status))
1845 spin_lock(&bp->lock);
1847 if (status & MACB_BIT(WOL)) {
1848 queue_writel(queue, IDR, MACB_BIT(WOL));
1849 macb_writel(bp, WOL, 0);
1850 netdev_vdbg(bp->dev, "MACB WoL: queue = %u, isr = 0x%08lx\n",
1851 (unsigned int)(queue - bp->queues),
1852 (unsigned long)status);
1853 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1854 queue_writel(queue, ISR, MACB_BIT(WOL));
1855 pm_wakeup_event(&bp->pdev->dev, 0);
1858 spin_unlock(&bp->lock);
1863 static irqreturn_t gem_wol_interrupt(int irq, void *dev_id)
1865 struct macb_queue *queue = dev_id;
1866 struct macb *bp = queue->bp;
1869 status = queue_readl(queue, ISR);
1871 if (unlikely(!status))
1874 spin_lock(&bp->lock);
1876 if (status & GEM_BIT(WOL)) {
1877 queue_writel(queue, IDR, GEM_BIT(WOL));
1878 gem_writel(bp, WOL, 0);
1879 netdev_vdbg(bp->dev, "GEM WoL: queue = %u, isr = 0x%08lx\n",
1880 (unsigned int)(queue - bp->queues),
1881 (unsigned long)status);
1882 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1883 queue_writel(queue, ISR, GEM_BIT(WOL));
1884 pm_wakeup_event(&bp->pdev->dev, 0);
1887 spin_unlock(&bp->lock);
1892 static irqreturn_t macb_interrupt(int irq, void *dev_id)
1894 struct macb_queue *queue = dev_id;
1895 struct macb *bp = queue->bp;
1896 struct net_device *dev = bp->dev;
1899 status = queue_readl(queue, ISR);
1901 if (unlikely(!status))
1904 spin_lock(&bp->lock);
1907 /* close possible race with dev_close */
1908 if (unlikely(!netif_running(dev))) {
1909 queue_writel(queue, IDR, -1);
1910 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1911 queue_writel(queue, ISR, -1);
1915 netdev_vdbg(bp->dev, "queue = %u, isr = 0x%08lx\n",
1916 (unsigned int)(queue - bp->queues),
1917 (unsigned long)status);
1919 if (status & bp->rx_intr_mask) {
1920 /* There's no point taking any more interrupts
1921 * until we have processed the buffers. The
1922 * scheduling call may fail if the poll routine
1923 * is already scheduled, so disable interrupts
1926 queue_writel(queue, IDR, bp->rx_intr_mask);
1927 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1928 queue_writel(queue, ISR, MACB_BIT(RCOMP));
1930 if (napi_schedule_prep(&queue->napi_rx)) {
1931 netdev_vdbg(bp->dev, "scheduling RX softirq\n");
1932 __napi_schedule(&queue->napi_rx);
1936 if (status & (MACB_BIT(TCOMP) |
1938 queue_writel(queue, IDR, MACB_BIT(TCOMP));
1939 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1940 queue_writel(queue, ISR, MACB_BIT(TCOMP) |
1943 if (status & MACB_BIT(TXUBR)) {
1944 queue->txubr_pending = true;
1945 wmb(); // ensure softirq can see update
1948 if (napi_schedule_prep(&queue->napi_tx)) {
1949 netdev_vdbg(bp->dev, "scheduling TX softirq\n");
1950 __napi_schedule(&queue->napi_tx);
1954 if (unlikely(status & (MACB_TX_ERR_FLAGS))) {
1955 queue_writel(queue, IDR, MACB_TX_INT_FLAGS);
1956 schedule_work(&queue->tx_error_task);
1958 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1959 queue_writel(queue, ISR, MACB_TX_ERR_FLAGS);
1964 /* Link change detection isn't possible with RMII, so we'll
1965 * add that if/when we get our hands on a full-blown MII PHY.
1968 /* There is a hardware issue under heavy load where DMA can
1969 * stop, this causes endless "used buffer descriptor read"
1970 * interrupts but it can be cleared by re-enabling RX. See
1971 * the at91rm9200 manual, section 41.3.1 or the Zynq manual
1972 * section 16.7.4 for details. RXUBR is only enabled for
1973 * these two versions.
1975 if (status & MACB_BIT(RXUBR)) {
1976 ctrl = macb_readl(bp, NCR);
1977 macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE));
1979 macb_writel(bp, NCR, ctrl | MACB_BIT(RE));
1981 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1982 queue_writel(queue, ISR, MACB_BIT(RXUBR));
1985 if (status & MACB_BIT(ISR_ROVR)) {
1986 /* We missed at least one packet */
1987 if (macb_is_gem(bp))
1988 bp->hw_stats.gem.rx_overruns++;
1990 bp->hw_stats.macb.rx_overruns++;
1992 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
1993 queue_writel(queue, ISR, MACB_BIT(ISR_ROVR));
1996 if (status & MACB_BIT(HRESP)) {
1997 tasklet_schedule(&bp->hresp_err_tasklet);
1998 netdev_err(dev, "DMA bus error: HRESP not OK\n");
2000 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
2001 queue_writel(queue, ISR, MACB_BIT(HRESP));
2003 status = queue_readl(queue, ISR);
2006 spin_unlock(&bp->lock);
2011 #ifdef CONFIG_NET_POLL_CONTROLLER
2012 /* Polling receive - used by netconsole and other diagnostic tools
2013 * to allow network i/o with interrupts disabled.
2015 static void macb_poll_controller(struct net_device *dev)
2017 struct macb *bp = netdev_priv(dev);
2018 struct macb_queue *queue;
2019 unsigned long flags;
2022 local_irq_save(flags);
2023 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
2024 macb_interrupt(dev->irq, queue);
2025 local_irq_restore(flags);
2029 static unsigned int macb_tx_map(struct macb *bp,
2030 struct macb_queue *queue,
2031 struct sk_buff *skb,
2032 unsigned int hdrlen)
2035 unsigned int len, entry, i, tx_head = queue->tx_head;
2036 struct macb_tx_skb *tx_skb = NULL;
2037 struct macb_dma_desc *desc;
2038 unsigned int offset, size, count = 0;
2039 unsigned int f, nr_frags = skb_shinfo(skb)->nr_frags;
2040 unsigned int eof = 1, mss_mfs = 0;
2041 u32 ctrl, lso_ctrl = 0, seq_ctrl = 0;
2044 if (skb_shinfo(skb)->gso_size != 0) {
2045 if (ip_hdr(skb)->protocol == IPPROTO_UDP)
2047 lso_ctrl = MACB_LSO_UFO_ENABLE;
2050 lso_ctrl = MACB_LSO_TSO_ENABLE;
2053 /* First, map non-paged data */
2054 len = skb_headlen(skb);
2056 /* first buffer length */
2061 entry = macb_tx_ring_wrap(bp, tx_head);
2062 tx_skb = &queue->tx_skb[entry];
2064 mapping = dma_map_single(&bp->pdev->dev,
2066 size, DMA_TO_DEVICE);
2067 if (dma_mapping_error(&bp->pdev->dev, mapping))
2070 /* Save info to properly release resources */
2072 tx_skb->mapping = mapping;
2073 tx_skb->size = size;
2074 tx_skb->mapped_as_page = false;
2081 size = min(len, bp->max_tx_length);
2084 /* Then, map paged data from fragments */
2085 for (f = 0; f < nr_frags; f++) {
2086 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2088 len = skb_frag_size(frag);
2091 size = min(len, bp->max_tx_length);
2092 entry = macb_tx_ring_wrap(bp, tx_head);
2093 tx_skb = &queue->tx_skb[entry];
2095 mapping = skb_frag_dma_map(&bp->pdev->dev, frag,
2096 offset, size, DMA_TO_DEVICE);
2097 if (dma_mapping_error(&bp->pdev->dev, mapping))
2100 /* Save info to properly release resources */
2102 tx_skb->mapping = mapping;
2103 tx_skb->size = size;
2104 tx_skb->mapped_as_page = true;
2113 /* Should never happen */
2114 if (unlikely(!tx_skb)) {
2115 netdev_err(bp->dev, "BUG! empty skb!\n");
2119 /* This is the last buffer of the frame: save socket buffer */
2122 /* Update TX ring: update buffer descriptors in reverse order
2123 * to avoid race condition
2126 /* Set 'TX_USED' bit in buffer descriptor at tx_head position
2127 * to set the end of TX queue
2130 entry = macb_tx_ring_wrap(bp, i);
2131 ctrl = MACB_BIT(TX_USED);
2132 desc = macb_tx_desc(queue, entry);
2136 if (lso_ctrl == MACB_LSO_UFO_ENABLE)
2137 /* include header and FCS in value given to h/w */
2138 mss_mfs = skb_shinfo(skb)->gso_size +
2139 skb_transport_offset(skb) +
2142 mss_mfs = skb_shinfo(skb)->gso_size;
2143 /* TCP Sequence Number Source Select
2144 * can be set only for TSO
2152 entry = macb_tx_ring_wrap(bp, i);
2153 tx_skb = &queue->tx_skb[entry];
2154 desc = macb_tx_desc(queue, entry);
2156 ctrl = (u32)tx_skb->size;
2158 ctrl |= MACB_BIT(TX_LAST);
2161 if (unlikely(entry == (bp->tx_ring_size - 1)))
2162 ctrl |= MACB_BIT(TX_WRAP);
2164 /* First descriptor is header descriptor */
2165 if (i == queue->tx_head) {
2166 ctrl |= MACB_BF(TX_LSO, lso_ctrl);
2167 ctrl |= MACB_BF(TX_TCP_SEQ_SRC, seq_ctrl);
2168 if ((bp->dev->features & NETIF_F_HW_CSUM) &&
2169 skb->ip_summed != CHECKSUM_PARTIAL && !lso_ctrl &&
2170 !ptp_one_step_sync(skb))
2171 ctrl |= MACB_BIT(TX_NOCRC);
2173 /* Only set MSS/MFS on payload descriptors
2174 * (second or later descriptor)
2176 ctrl |= MACB_BF(MSS_MFS, mss_mfs);
2178 /* Set TX buffer descriptor */
2179 macb_set_addr(bp, desc, tx_skb->mapping);
2180 /* desc->addr must be visible to hardware before clearing
2181 * 'TX_USED' bit in desc->ctrl.
2185 } while (i != queue->tx_head);
2187 queue->tx_head = tx_head;
2192 netdev_err(bp->dev, "TX DMA map failed\n");
2194 for (i = queue->tx_head; i != tx_head; i++) {
2195 tx_skb = macb_tx_skb(queue, i);
2197 macb_tx_unmap(bp, tx_skb, 0);
2203 static netdev_features_t macb_features_check(struct sk_buff *skb,
2204 struct net_device *dev,
2205 netdev_features_t features)
2207 unsigned int nr_frags, f;
2208 unsigned int hdrlen;
2210 /* Validate LSO compatibility */
2212 /* there is only one buffer or protocol is not UDP */
2213 if (!skb_is_nonlinear(skb) || (ip_hdr(skb)->protocol != IPPROTO_UDP))
2216 /* length of header */
2217 hdrlen = skb_transport_offset(skb);
2220 * When software supplies two or more payload buffers all payload buffers
2221 * apart from the last must be a multiple of 8 bytes in size.
2223 if (!IS_ALIGNED(skb_headlen(skb) - hdrlen, MACB_TX_LEN_ALIGN))
2224 return features & ~MACB_NETIF_LSO;
2226 nr_frags = skb_shinfo(skb)->nr_frags;
2227 /* No need to check last fragment */
2229 for (f = 0; f < nr_frags; f++) {
2230 const skb_frag_t *frag = &skb_shinfo(skb)->frags[f];
2232 if (!IS_ALIGNED(skb_frag_size(frag), MACB_TX_LEN_ALIGN))
2233 return features & ~MACB_NETIF_LSO;
2238 static inline int macb_clear_csum(struct sk_buff *skb)
2240 /* no change for packets without checksum offloading */
2241 if (skb->ip_summed != CHECKSUM_PARTIAL)
2244 /* make sure we can modify the header */
2245 if (unlikely(skb_cow_head(skb, 0)))
2248 /* initialize checksum field
2249 * This is required - at least for Zynq, which otherwise calculates
2250 * wrong UDP header checksums for UDP packets with UDP data len <=2
2252 *(__sum16 *)(skb_checksum_start(skb) + skb->csum_offset) = 0;
2256 static int macb_pad_and_fcs(struct sk_buff **skb, struct net_device *ndev)
2258 bool cloned = skb_cloned(*skb) || skb_header_cloned(*skb) ||
2259 skb_is_nonlinear(*skb);
2260 int padlen = ETH_ZLEN - (*skb)->len;
2261 int tailroom = skb_tailroom(*skb);
2262 struct sk_buff *nskb;
2265 if (!(ndev->features & NETIF_F_HW_CSUM) ||
2266 !((*skb)->ip_summed != CHECKSUM_PARTIAL) ||
2267 skb_shinfo(*skb)->gso_size || ptp_one_step_sync(*skb))
2271 /* FCS could be appeded to tailroom. */
2272 if (tailroom >= ETH_FCS_LEN)
2274 /* No room for FCS, need to reallocate skb. */
2276 padlen = ETH_FCS_LEN;
2278 /* Add room for FCS. */
2279 padlen += ETH_FCS_LEN;
2282 if (cloned || tailroom < padlen) {
2283 nskb = skb_copy_expand(*skb, 0, padlen, GFP_ATOMIC);
2287 dev_consume_skb_any(*skb);
2291 if (padlen > ETH_FCS_LEN)
2292 skb_put_zero(*skb, padlen - ETH_FCS_LEN);
2295 /* set FCS to packet */
2296 fcs = crc32_le(~0, (*skb)->data, (*skb)->len);
2299 skb_put_u8(*skb, fcs & 0xff);
2300 skb_put_u8(*skb, (fcs >> 8) & 0xff);
2301 skb_put_u8(*skb, (fcs >> 16) & 0xff);
2302 skb_put_u8(*skb, (fcs >> 24) & 0xff);
2307 static netdev_tx_t macb_start_xmit(struct sk_buff *skb, struct net_device *dev)
2309 u16 queue_index = skb_get_queue_mapping(skb);
2310 struct macb *bp = netdev_priv(dev);
2311 struct macb_queue *queue = &bp->queues[queue_index];
2312 unsigned int desc_cnt, nr_frags, frag_size, f;
2313 unsigned int hdrlen;
2315 netdev_tx_t ret = NETDEV_TX_OK;
2317 if (macb_clear_csum(skb)) {
2318 dev_kfree_skb_any(skb);
2322 if (macb_pad_and_fcs(&skb, dev)) {
2323 dev_kfree_skb_any(skb);
2327 #ifdef CONFIG_MACB_USE_HWSTAMP
2328 if ((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
2329 (bp->hw_dma_cap & HW_DMA_CAP_PTP))
2330 skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
2333 is_lso = (skb_shinfo(skb)->gso_size != 0);
2336 /* length of headers */
2337 if (ip_hdr(skb)->protocol == IPPROTO_UDP)
2338 /* only queue eth + ip headers separately for UDP */
2339 hdrlen = skb_transport_offset(skb);
2341 hdrlen = skb_tcp_all_headers(skb);
2342 if (skb_headlen(skb) < hdrlen) {
2343 netdev_err(bp->dev, "Error - LSO headers fragmented!!!\n");
2344 /* if this is required, would need to copy to single buffer */
2345 return NETDEV_TX_BUSY;
2348 hdrlen = min(skb_headlen(skb), bp->max_tx_length);
2350 #if defined(DEBUG) && defined(VERBOSE_DEBUG)
2351 netdev_vdbg(bp->dev,
2352 "start_xmit: queue %hu len %u head %p data %p tail %p end %p\n",
2353 queue_index, skb->len, skb->head, skb->data,
2354 skb_tail_pointer(skb), skb_end_pointer(skb));
2355 print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_OFFSET, 16, 1,
2356 skb->data, 16, true);
2359 /* Count how many TX buffer descriptors are needed to send this
2360 * socket buffer: skb fragments of jumbo frames may need to be
2361 * split into many buffer descriptors.
2363 if (is_lso && (skb_headlen(skb) > hdrlen))
2364 /* extra header descriptor if also payload in first buffer */
2365 desc_cnt = DIV_ROUND_UP((skb_headlen(skb) - hdrlen), bp->max_tx_length) + 1;
2367 desc_cnt = DIV_ROUND_UP(skb_headlen(skb), bp->max_tx_length);
2368 nr_frags = skb_shinfo(skb)->nr_frags;
2369 for (f = 0; f < nr_frags; f++) {
2370 frag_size = skb_frag_size(&skb_shinfo(skb)->frags[f]);
2371 desc_cnt += DIV_ROUND_UP(frag_size, bp->max_tx_length);
2374 spin_lock_bh(&queue->tx_ptr_lock);
2376 /* This is a hard error, log it. */
2377 if (CIRC_SPACE(queue->tx_head, queue->tx_tail,
2378 bp->tx_ring_size) < desc_cnt) {
2379 netif_stop_subqueue(dev, queue_index);
2380 netdev_dbg(bp->dev, "tx_head = %u, tx_tail = %u\n",
2381 queue->tx_head, queue->tx_tail);
2382 ret = NETDEV_TX_BUSY;
2386 /* Map socket buffer for DMA transfer */
2387 if (!macb_tx_map(bp, queue, skb, hdrlen)) {
2388 dev_kfree_skb_any(skb);
2392 /* Make newly initialized descriptor visible to hardware */
2394 skb_tx_timestamp(skb);
2396 spin_lock_irq(&bp->lock);
2397 macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART));
2398 spin_unlock_irq(&bp->lock);
2400 if (CIRC_SPACE(queue->tx_head, queue->tx_tail, bp->tx_ring_size) < 1)
2401 netif_stop_subqueue(dev, queue_index);
2404 spin_unlock_bh(&queue->tx_ptr_lock);
2409 static void macb_init_rx_buffer_size(struct macb *bp, size_t size)
2411 if (!macb_is_gem(bp)) {
2412 bp->rx_buffer_size = MACB_RX_BUFFER_SIZE;
2414 bp->rx_buffer_size = size;
2416 if (bp->rx_buffer_size % RX_BUFFER_MULTIPLE) {
2418 "RX buffer must be multiple of %d bytes, expanding\n",
2419 RX_BUFFER_MULTIPLE);
2420 bp->rx_buffer_size =
2421 roundup(bp->rx_buffer_size, RX_BUFFER_MULTIPLE);
2425 netdev_dbg(bp->dev, "mtu [%u] rx_buffer_size [%zu]\n",
2426 bp->dev->mtu, bp->rx_buffer_size);
2429 static void gem_free_rx_buffers(struct macb *bp)
2431 struct sk_buff *skb;
2432 struct macb_dma_desc *desc;
2433 struct macb_queue *queue;
2438 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2439 if (!queue->rx_skbuff)
2442 for (i = 0; i < bp->rx_ring_size; i++) {
2443 skb = queue->rx_skbuff[i];
2448 desc = macb_rx_desc(queue, i);
2449 addr = macb_get_addr(bp, desc);
2451 dma_unmap_single(&bp->pdev->dev, addr, bp->rx_buffer_size,
2453 dev_kfree_skb_any(skb);
2457 kfree(queue->rx_skbuff);
2458 queue->rx_skbuff = NULL;
2462 static void macb_free_rx_buffers(struct macb *bp)
2464 struct macb_queue *queue = &bp->queues[0];
2466 if (queue->rx_buffers) {
2467 dma_free_coherent(&bp->pdev->dev,
2468 bp->rx_ring_size * bp->rx_buffer_size,
2469 queue->rx_buffers, queue->rx_buffers_dma);
2470 queue->rx_buffers = NULL;
2474 static void macb_free_consistent(struct macb *bp)
2476 struct macb_queue *queue;
2480 if (bp->rx_ring_tieoff) {
2481 dma_free_coherent(&bp->pdev->dev, macb_dma_desc_get_size(bp),
2482 bp->rx_ring_tieoff, bp->rx_ring_tieoff_dma);
2483 bp->rx_ring_tieoff = NULL;
2486 bp->macbgem_ops.mog_free_rx_buffers(bp);
2488 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2489 kfree(queue->tx_skb);
2490 queue->tx_skb = NULL;
2491 if (queue->tx_ring) {
2492 size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch;
2493 dma_free_coherent(&bp->pdev->dev, size,
2494 queue->tx_ring, queue->tx_ring_dma);
2495 queue->tx_ring = NULL;
2497 if (queue->rx_ring) {
2498 size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch;
2499 dma_free_coherent(&bp->pdev->dev, size,
2500 queue->rx_ring, queue->rx_ring_dma);
2501 queue->rx_ring = NULL;
2506 static int gem_alloc_rx_buffers(struct macb *bp)
2508 struct macb_queue *queue;
2512 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2513 size = bp->rx_ring_size * sizeof(struct sk_buff *);
2514 queue->rx_skbuff = kzalloc(size, GFP_KERNEL);
2515 if (!queue->rx_skbuff)
2519 "Allocated %d RX struct sk_buff entries at %p\n",
2520 bp->rx_ring_size, queue->rx_skbuff);
2525 static int macb_alloc_rx_buffers(struct macb *bp)
2527 struct macb_queue *queue = &bp->queues[0];
2530 size = bp->rx_ring_size * bp->rx_buffer_size;
2531 queue->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size,
2532 &queue->rx_buffers_dma, GFP_KERNEL);
2533 if (!queue->rx_buffers)
2537 "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n",
2538 size, (unsigned long)queue->rx_buffers_dma, queue->rx_buffers);
2542 static int macb_alloc_consistent(struct macb *bp)
2544 struct macb_queue *queue;
2548 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2549 size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch;
2550 queue->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
2551 &queue->tx_ring_dma,
2553 if (!queue->tx_ring)
2556 "Allocated TX ring for queue %u of %d bytes at %08lx (mapped %p)\n",
2557 q, size, (unsigned long)queue->tx_ring_dma,
2560 size = bp->tx_ring_size * sizeof(struct macb_tx_skb);
2561 queue->tx_skb = kmalloc(size, GFP_KERNEL);
2565 size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch;
2566 queue->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size,
2567 &queue->rx_ring_dma, GFP_KERNEL);
2568 if (!queue->rx_ring)
2571 "Allocated RX ring of %d bytes at %08lx (mapped %p)\n",
2572 size, (unsigned long)queue->rx_ring_dma, queue->rx_ring);
2574 if (bp->macbgem_ops.mog_alloc_rx_buffers(bp))
2577 /* Required for tie off descriptor for PM cases */
2578 if (!(bp->caps & MACB_CAPS_QUEUE_DISABLE)) {
2579 bp->rx_ring_tieoff = dma_alloc_coherent(&bp->pdev->dev,
2580 macb_dma_desc_get_size(bp),
2581 &bp->rx_ring_tieoff_dma,
2583 if (!bp->rx_ring_tieoff)
2590 macb_free_consistent(bp);
2594 static void macb_init_tieoff(struct macb *bp)
2596 struct macb_dma_desc *desc = bp->rx_ring_tieoff;
2598 if (bp->caps & MACB_CAPS_QUEUE_DISABLE)
2600 /* Setup a wrapping descriptor with no free slots
2601 * (WRAP and USED) to tie off/disable unused RX queues.
2603 macb_set_addr(bp, desc, MACB_BIT(RX_WRAP) | MACB_BIT(RX_USED));
2607 static void gem_init_rings(struct macb *bp)
2609 struct macb_queue *queue;
2610 struct macb_dma_desc *desc = NULL;
2614 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2615 for (i = 0; i < bp->tx_ring_size; i++) {
2616 desc = macb_tx_desc(queue, i);
2617 macb_set_addr(bp, desc, 0);
2618 desc->ctrl = MACB_BIT(TX_USED);
2620 desc->ctrl |= MACB_BIT(TX_WRAP);
2625 queue->rx_prepared_head = 0;
2627 gem_rx_refill(queue);
2630 macb_init_tieoff(bp);
2633 static void macb_init_rings(struct macb *bp)
2636 struct macb_dma_desc *desc = NULL;
2638 macb_init_rx_ring(&bp->queues[0]);
2640 for (i = 0; i < bp->tx_ring_size; i++) {
2641 desc = macb_tx_desc(&bp->queues[0], i);
2642 macb_set_addr(bp, desc, 0);
2643 desc->ctrl = MACB_BIT(TX_USED);
2645 bp->queues[0].tx_head = 0;
2646 bp->queues[0].tx_tail = 0;
2647 desc->ctrl |= MACB_BIT(TX_WRAP);
2649 macb_init_tieoff(bp);
2652 static void macb_reset_hw(struct macb *bp)
2654 struct macb_queue *queue;
2656 u32 ctrl = macb_readl(bp, NCR);
2658 /* Disable RX and TX (XXX: Should we halt the transmission
2661 ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE));
2663 /* Clear the stats registers (XXX: Update stats first?) */
2664 ctrl |= MACB_BIT(CLRSTAT);
2666 macb_writel(bp, NCR, ctrl);
2668 /* Clear all status flags */
2669 macb_writel(bp, TSR, -1);
2670 macb_writel(bp, RSR, -1);
2672 /* Disable RX partial store and forward and reset watermark value */
2673 gem_writel(bp, PBUFRXCUT, 0);
2675 /* Disable all interrupts */
2676 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2677 queue_writel(queue, IDR, -1);
2678 queue_readl(queue, ISR);
2679 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
2680 queue_writel(queue, ISR, -1);
2684 static u32 gem_mdc_clk_div(struct macb *bp)
2687 unsigned long pclk_hz = clk_get_rate(bp->pclk);
2689 if (pclk_hz <= 20000000)
2690 config = GEM_BF(CLK, GEM_CLK_DIV8);
2691 else if (pclk_hz <= 40000000)
2692 config = GEM_BF(CLK, GEM_CLK_DIV16);
2693 else if (pclk_hz <= 80000000)
2694 config = GEM_BF(CLK, GEM_CLK_DIV32);
2695 else if (pclk_hz <= 120000000)
2696 config = GEM_BF(CLK, GEM_CLK_DIV48);
2697 else if (pclk_hz <= 160000000)
2698 config = GEM_BF(CLK, GEM_CLK_DIV64);
2699 else if (pclk_hz <= 240000000)
2700 config = GEM_BF(CLK, GEM_CLK_DIV96);
2701 else if (pclk_hz <= 320000000)
2702 config = GEM_BF(CLK, GEM_CLK_DIV128);
2704 config = GEM_BF(CLK, GEM_CLK_DIV224);
2709 static u32 macb_mdc_clk_div(struct macb *bp)
2712 unsigned long pclk_hz;
2714 if (macb_is_gem(bp))
2715 return gem_mdc_clk_div(bp);
2717 pclk_hz = clk_get_rate(bp->pclk);
2718 if (pclk_hz <= 20000000)
2719 config = MACB_BF(CLK, MACB_CLK_DIV8);
2720 else if (pclk_hz <= 40000000)
2721 config = MACB_BF(CLK, MACB_CLK_DIV16);
2722 else if (pclk_hz <= 80000000)
2723 config = MACB_BF(CLK, MACB_CLK_DIV32);
2725 config = MACB_BF(CLK, MACB_CLK_DIV64);
2730 /* Get the DMA bus width field of the network configuration register that we
2731 * should program. We find the width from decoding the design configuration
2732 * register to find the maximum supported data bus width.
2734 static u32 macb_dbw(struct macb *bp)
2736 if (!macb_is_gem(bp))
2739 switch (GEM_BFEXT(DBWDEF, gem_readl(bp, DCFG1))) {
2741 return GEM_BF(DBW, GEM_DBW128);
2743 return GEM_BF(DBW, GEM_DBW64);
2746 return GEM_BF(DBW, GEM_DBW32);
2750 /* Configure the receive DMA engine
2751 * - use the correct receive buffer size
2752 * - set best burst length for DMA operations
2753 * (if not supported by FIFO, it will fallback to default)
2754 * - set both rx/tx packet buffers to full memory size
2755 * These are configurable parameters for GEM.
2757 static void macb_configure_dma(struct macb *bp)
2759 struct macb_queue *queue;
2764 buffer_size = bp->rx_buffer_size / RX_BUFFER_MULTIPLE;
2765 if (macb_is_gem(bp)) {
2766 dmacfg = gem_readl(bp, DMACFG) & ~GEM_BF(RXBS, -1L);
2767 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2769 queue_writel(queue, RBQS, buffer_size);
2771 dmacfg |= GEM_BF(RXBS, buffer_size);
2773 if (bp->dma_burst_length)
2774 dmacfg = GEM_BFINS(FBLDO, bp->dma_burst_length, dmacfg);
2775 dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L);
2776 dmacfg &= ~GEM_BIT(ENDIA_PKT);
2779 dmacfg &= ~GEM_BIT(ENDIA_DESC);
2781 dmacfg |= GEM_BIT(ENDIA_DESC); /* CPU in big endian */
2783 if (bp->dev->features & NETIF_F_HW_CSUM)
2784 dmacfg |= GEM_BIT(TXCOEN);
2786 dmacfg &= ~GEM_BIT(TXCOEN);
2788 dmacfg &= ~GEM_BIT(ADDR64);
2789 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
2790 if (bp->hw_dma_cap & HW_DMA_CAP_64B)
2791 dmacfg |= GEM_BIT(ADDR64);
2793 #ifdef CONFIG_MACB_USE_HWSTAMP
2794 if (bp->hw_dma_cap & HW_DMA_CAP_PTP)
2795 dmacfg |= GEM_BIT(RXEXT) | GEM_BIT(TXEXT);
2797 netdev_dbg(bp->dev, "Cadence configure DMA with 0x%08x\n",
2799 gem_writel(bp, DMACFG, dmacfg);
2803 static void macb_init_hw(struct macb *bp)
2808 macb_set_hwaddr(bp);
2810 config = macb_mdc_clk_div(bp);
2811 config |= MACB_BF(RBOF, NET_IP_ALIGN); /* Make eth data aligned */
2812 config |= MACB_BIT(DRFCS); /* Discard Rx FCS */
2813 if (bp->caps & MACB_CAPS_JUMBO)
2814 config |= MACB_BIT(JFRAME); /* Enable jumbo frames */
2816 config |= MACB_BIT(BIG); /* Receive oversized frames */
2817 if (bp->dev->flags & IFF_PROMISC)
2818 config |= MACB_BIT(CAF); /* Copy All Frames */
2819 else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM)
2820 config |= GEM_BIT(RXCOEN);
2821 if (!(bp->dev->flags & IFF_BROADCAST))
2822 config |= MACB_BIT(NBC); /* No BroadCast */
2823 config |= macb_dbw(bp);
2824 macb_writel(bp, NCFGR, config);
2825 if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len)
2826 gem_writel(bp, JML, bp->jumbo_max_len);
2827 bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK;
2828 if (bp->caps & MACB_CAPS_JUMBO)
2829 bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK;
2831 macb_configure_dma(bp);
2833 /* Enable RX partial store and forward and set watermark */
2834 if (bp->rx_watermark)
2835 gem_writel(bp, PBUFRXCUT, (bp->rx_watermark | GEM_BIT(ENCUTTHRU)));
2838 /* The hash address register is 64 bits long and takes up two
2839 * locations in the memory map. The least significant bits are stored
2840 * in EMAC_HSL and the most significant bits in EMAC_HSH.
2842 * The unicast hash enable and the multicast hash enable bits in the
2843 * network configuration register enable the reception of hash matched
2844 * frames. The destination address is reduced to a 6 bit index into
2845 * the 64 bit hash register using the following hash function. The
2846 * hash function is an exclusive or of every sixth bit of the
2847 * destination address.
2849 * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47]
2850 * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46]
2851 * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45]
2852 * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44]
2853 * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43]
2854 * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42]
2856 * da[0] represents the least significant bit of the first byte
2857 * received, that is, the multicast/unicast indicator, and da[47]
2858 * represents the most significant bit of the last byte received. If
2859 * the hash index, hi[n], points to a bit that is set in the hash
2860 * register then the frame will be matched according to whether the
2861 * frame is multicast or unicast. A multicast match will be signalled
2862 * if the multicast hash enable bit is set, da[0] is 1 and the hash
2863 * index points to a bit set in the hash register. A unicast match
2864 * will be signalled if the unicast hash enable bit is set, da[0] is 0
2865 * and the hash index points to a bit set in the hash register. To
2866 * receive all multicast frames, the hash register should be set with
2867 * all ones and the multicast hash enable bit should be set in the
2868 * network configuration register.
2871 static inline int hash_bit_value(int bitnr, __u8 *addr)
2873 if (addr[bitnr / 8] & (1 << (bitnr % 8)))
2878 /* Return the hash index value for the specified address. */
2879 static int hash_get_index(__u8 *addr)
2884 for (j = 0; j < 6; j++) {
2885 for (i = 0, bitval = 0; i < 8; i++)
2886 bitval ^= hash_bit_value(i * 6 + j, addr);
2888 hash_index |= (bitval << j);
2894 /* Add multicast addresses to the internal multicast-hash table. */
2895 static void macb_sethashtable(struct net_device *dev)
2897 struct netdev_hw_addr *ha;
2898 unsigned long mc_filter[2];
2900 struct macb *bp = netdev_priv(dev);
2905 netdev_for_each_mc_addr(ha, dev) {
2906 bitnr = hash_get_index(ha->addr);
2907 mc_filter[bitnr >> 5] |= 1 << (bitnr & 31);
2910 macb_or_gem_writel(bp, HRB, mc_filter[0]);
2911 macb_or_gem_writel(bp, HRT, mc_filter[1]);
2914 /* Enable/Disable promiscuous and multicast modes. */
2915 static void macb_set_rx_mode(struct net_device *dev)
2918 struct macb *bp = netdev_priv(dev);
2920 cfg = macb_readl(bp, NCFGR);
2922 if (dev->flags & IFF_PROMISC) {
2923 /* Enable promiscuous mode */
2924 cfg |= MACB_BIT(CAF);
2926 /* Disable RX checksum offload */
2927 if (macb_is_gem(bp))
2928 cfg &= ~GEM_BIT(RXCOEN);
2930 /* Disable promiscuous mode */
2931 cfg &= ~MACB_BIT(CAF);
2933 /* Enable RX checksum offload only if requested */
2934 if (macb_is_gem(bp) && dev->features & NETIF_F_RXCSUM)
2935 cfg |= GEM_BIT(RXCOEN);
2938 if (dev->flags & IFF_ALLMULTI) {
2939 /* Enable all multicast mode */
2940 macb_or_gem_writel(bp, HRB, -1);
2941 macb_or_gem_writel(bp, HRT, -1);
2942 cfg |= MACB_BIT(NCFGR_MTI);
2943 } else if (!netdev_mc_empty(dev)) {
2944 /* Enable specific multicasts */
2945 macb_sethashtable(dev);
2946 cfg |= MACB_BIT(NCFGR_MTI);
2947 } else if (dev->flags & (~IFF_ALLMULTI)) {
2948 /* Disable all multicast mode */
2949 macb_or_gem_writel(bp, HRB, 0);
2950 macb_or_gem_writel(bp, HRT, 0);
2951 cfg &= ~MACB_BIT(NCFGR_MTI);
2954 macb_writel(bp, NCFGR, cfg);
2957 static int macb_open(struct net_device *dev)
2959 size_t bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN;
2960 struct macb *bp = netdev_priv(dev);
2961 struct macb_queue *queue;
2965 netdev_dbg(bp->dev, "open\n");
2967 err = pm_runtime_resume_and_get(&bp->pdev->dev);
2971 /* RX buffers initialization */
2972 macb_init_rx_buffer_size(bp, bufsz);
2974 err = macb_alloc_consistent(bp);
2976 netdev_err(dev, "Unable to allocate DMA memory (error %d)\n",
2981 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
2982 napi_enable(&queue->napi_rx);
2983 napi_enable(&queue->napi_tx);
2988 err = phy_power_on(bp->sgmii_phy);
2992 err = macb_phylink_connect(bp);
2996 netif_tx_start_all_queues(dev);
2999 bp->ptp_info->ptp_init(dev);
3004 phy_power_off(bp->sgmii_phy);
3008 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
3009 napi_disable(&queue->napi_rx);
3010 napi_disable(&queue->napi_tx);
3012 macb_free_consistent(bp);
3014 pm_runtime_put_sync(&bp->pdev->dev);
3018 static int macb_close(struct net_device *dev)
3020 struct macb *bp = netdev_priv(dev);
3021 struct macb_queue *queue;
3022 unsigned long flags;
3025 netif_tx_stop_all_queues(dev);
3027 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
3028 napi_disable(&queue->napi_rx);
3029 napi_disable(&queue->napi_tx);
3032 phylink_stop(bp->phylink);
3033 phylink_disconnect_phy(bp->phylink);
3035 phy_power_off(bp->sgmii_phy);
3037 spin_lock_irqsave(&bp->lock, flags);
3039 netif_carrier_off(dev);
3040 spin_unlock_irqrestore(&bp->lock, flags);
3042 macb_free_consistent(bp);
3045 bp->ptp_info->ptp_remove(dev);
3047 pm_runtime_put(&bp->pdev->dev);
3052 static int macb_change_mtu(struct net_device *dev, int new_mtu)
3054 if (netif_running(dev))
3057 WRITE_ONCE(dev->mtu, new_mtu);
3062 static int macb_set_mac_addr(struct net_device *dev, void *addr)
3066 err = eth_mac_addr(dev, addr);
3070 macb_set_hwaddr(netdev_priv(dev));
3074 static void gem_update_stats(struct macb *bp)
3076 struct macb_queue *queue;
3077 unsigned int i, q, idx;
3078 unsigned long *stat;
3080 u32 *p = &bp->hw_stats.gem.tx_octets_31_0;
3082 for (i = 0; i < GEM_STATS_LEN; ++i, ++p) {
3083 u32 offset = gem_statistics[i].offset;
3084 u64 val = bp->macb_reg_readl(bp, offset);
3086 bp->ethtool_stats[i] += val;
3089 if (offset == GEM_OCTTXL || offset == GEM_OCTRXL) {
3090 /* Add GEM_OCTTXH, GEM_OCTRXH */
3091 val = bp->macb_reg_readl(bp, offset + 4);
3092 bp->ethtool_stats[i] += ((u64)val) << 32;
3097 idx = GEM_STATS_LEN;
3098 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue)
3099 for (i = 0, stat = &queue->stats.first; i < QUEUE_STATS_LEN; ++i, ++stat)
3100 bp->ethtool_stats[idx++] = *stat;
3103 static struct net_device_stats *gem_get_stats(struct macb *bp)
3105 struct gem_stats *hwstat = &bp->hw_stats.gem;
3106 struct net_device_stats *nstat = &bp->dev->stats;
3108 if (!netif_running(bp->dev))
3111 gem_update_stats(bp);
3113 nstat->rx_errors = (hwstat->rx_frame_check_sequence_errors +
3114 hwstat->rx_alignment_errors +
3115 hwstat->rx_resource_errors +
3116 hwstat->rx_overruns +
3117 hwstat->rx_oversize_frames +
3118 hwstat->rx_jabbers +
3119 hwstat->rx_undersized_frames +
3120 hwstat->rx_length_field_frame_errors);
3121 nstat->tx_errors = (hwstat->tx_late_collisions +
3122 hwstat->tx_excessive_collisions +
3123 hwstat->tx_underrun +
3124 hwstat->tx_carrier_sense_errors);
3125 nstat->multicast = hwstat->rx_multicast_frames;
3126 nstat->collisions = (hwstat->tx_single_collision_frames +
3127 hwstat->tx_multiple_collision_frames +
3128 hwstat->tx_excessive_collisions);
3129 nstat->rx_length_errors = (hwstat->rx_oversize_frames +
3130 hwstat->rx_jabbers +
3131 hwstat->rx_undersized_frames +
3132 hwstat->rx_length_field_frame_errors);
3133 nstat->rx_over_errors = hwstat->rx_resource_errors;
3134 nstat->rx_crc_errors = hwstat->rx_frame_check_sequence_errors;
3135 nstat->rx_frame_errors = hwstat->rx_alignment_errors;
3136 nstat->rx_fifo_errors = hwstat->rx_overruns;
3137 nstat->tx_aborted_errors = hwstat->tx_excessive_collisions;
3138 nstat->tx_carrier_errors = hwstat->tx_carrier_sense_errors;
3139 nstat->tx_fifo_errors = hwstat->tx_underrun;
3144 static void gem_get_ethtool_stats(struct net_device *dev,
3145 struct ethtool_stats *stats, u64 *data)
3149 bp = netdev_priv(dev);
3150 gem_update_stats(bp);
3151 memcpy(data, &bp->ethtool_stats, sizeof(u64)
3152 * (GEM_STATS_LEN + QUEUE_STATS_LEN * MACB_MAX_QUEUES));
3155 static int gem_get_sset_count(struct net_device *dev, int sset)
3157 struct macb *bp = netdev_priv(dev);
3161 return GEM_STATS_LEN + bp->num_queues * QUEUE_STATS_LEN;
3167 static void gem_get_ethtool_strings(struct net_device *dev, u32 sset, u8 *p)
3169 char stat_string[ETH_GSTRING_LEN];
3170 struct macb *bp = netdev_priv(dev);
3171 struct macb_queue *queue;
3177 for (i = 0; i < GEM_STATS_LEN; i++, p += ETH_GSTRING_LEN)
3178 memcpy(p, gem_statistics[i].stat_string,
3181 for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) {
3182 for (i = 0; i < QUEUE_STATS_LEN; i++, p += ETH_GSTRING_LEN) {
3183 snprintf(stat_string, ETH_GSTRING_LEN, "q%d_%s",
3184 q, queue_statistics[i].stat_string);
3185 memcpy(p, stat_string, ETH_GSTRING_LEN);
3192 static struct net_device_stats *macb_get_stats(struct net_device *dev)
3194 struct macb *bp = netdev_priv(dev);
3195 struct net_device_stats *nstat = &bp->dev->stats;
3196 struct macb_stats *hwstat = &bp->hw_stats.macb;
3198 if (macb_is_gem(bp))
3199 return gem_get_stats(bp);
3201 /* read stats from hardware */
3202 macb_update_stats(bp);
3204 /* Convert HW stats into netdevice stats */
3205 nstat->rx_errors = (hwstat->rx_fcs_errors +
3206 hwstat->rx_align_errors +
3207 hwstat->rx_resource_errors +
3208 hwstat->rx_overruns +
3209 hwstat->rx_oversize_pkts +
3210 hwstat->rx_jabbers +
3211 hwstat->rx_undersize_pkts +
3212 hwstat->rx_length_mismatch);
3213 nstat->tx_errors = (hwstat->tx_late_cols +
3214 hwstat->tx_excessive_cols +
3215 hwstat->tx_underruns +
3216 hwstat->tx_carrier_errors +
3217 hwstat->sqe_test_errors);
3218 nstat->collisions = (hwstat->tx_single_cols +
3219 hwstat->tx_multiple_cols +
3220 hwstat->tx_excessive_cols);
3221 nstat->rx_length_errors = (hwstat->rx_oversize_pkts +
3222 hwstat->rx_jabbers +
3223 hwstat->rx_undersize_pkts +
3224 hwstat->rx_length_mismatch);
3225 nstat->rx_over_errors = hwstat->rx_resource_errors +
3226 hwstat->rx_overruns;
3227 nstat->rx_crc_errors = hwstat->rx_fcs_errors;
3228 nstat->rx_frame_errors = hwstat->rx_align_errors;
3229 nstat->rx_fifo_errors = hwstat->rx_overruns;
3230 /* XXX: What does "missed" mean? */
3231 nstat->tx_aborted_errors = hwstat->tx_excessive_cols;
3232 nstat->tx_carrier_errors = hwstat->tx_carrier_errors;
3233 nstat->tx_fifo_errors = hwstat->tx_underruns;
3234 /* Don't know about heartbeat or window errors... */
3239 static int macb_get_regs_len(struct net_device *netdev)
3241 return MACB_GREGS_NBR * sizeof(u32);
3244 static void macb_get_regs(struct net_device *dev, struct ethtool_regs *regs,
3247 struct macb *bp = netdev_priv(dev);
3248 unsigned int tail, head;
3251 regs->version = (macb_readl(bp, MID) & ((1 << MACB_REV_SIZE) - 1))
3252 | MACB_GREGS_VERSION;
3254 tail = macb_tx_ring_wrap(bp, bp->queues[0].tx_tail);
3255 head = macb_tx_ring_wrap(bp, bp->queues[0].tx_head);
3257 regs_buff[0] = macb_readl(bp, NCR);
3258 regs_buff[1] = macb_or_gem_readl(bp, NCFGR);
3259 regs_buff[2] = macb_readl(bp, NSR);
3260 regs_buff[3] = macb_readl(bp, TSR);
3261 regs_buff[4] = macb_readl(bp, RBQP);
3262 regs_buff[5] = macb_readl(bp, TBQP);
3263 regs_buff[6] = macb_readl(bp, RSR);
3264 regs_buff[7] = macb_readl(bp, IMR);
3266 regs_buff[8] = tail;
3267 regs_buff[9] = head;
3268 regs_buff[10] = macb_tx_dma(&bp->queues[0], tail);
3269 regs_buff[11] = macb_tx_dma(&bp->queues[0], head);
3271 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED))
3272 regs_buff[12] = macb_or_gem_readl(bp, USRIO);
3273 if (macb_is_gem(bp))
3274 regs_buff[13] = gem_readl(bp, DMACFG);
3277 static void macb_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
3279 struct macb *bp = netdev_priv(netdev);
3281 phylink_ethtool_get_wol(bp->phylink, wol);
3282 wol->supported |= (WAKE_MAGIC | WAKE_ARP);
3284 /* Add macb wolopts to phy wolopts */
3285 wol->wolopts |= bp->wolopts;
3288 static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)
3290 struct macb *bp = netdev_priv(netdev);
3293 /* Pass the order to phylink layer */
3294 ret = phylink_ethtool_set_wol(bp->phylink, wol);
3295 /* Don't manage WoL on MAC, if PHY set_wol() fails */
3296 if (ret && ret != -EOPNOTSUPP)
3299 bp->wolopts = (wol->wolopts & WAKE_MAGIC) ? WAKE_MAGIC : 0;
3300 bp->wolopts |= (wol->wolopts & WAKE_ARP) ? WAKE_ARP : 0;
3301 bp->wol = (wol->wolopts) ? MACB_WOL_ENABLED : 0;
3303 device_set_wakeup_enable(&bp->pdev->dev, bp->wol);
3308 static int macb_get_link_ksettings(struct net_device *netdev,
3309 struct ethtool_link_ksettings *kset)
3311 struct macb *bp = netdev_priv(netdev);
3313 return phylink_ethtool_ksettings_get(bp->phylink, kset);
3316 static int macb_set_link_ksettings(struct net_device *netdev,
3317 const struct ethtool_link_ksettings *kset)
3319 struct macb *bp = netdev_priv(netdev);
3321 return phylink_ethtool_ksettings_set(bp->phylink, kset);
3324 static void macb_get_ringparam(struct net_device *netdev,
3325 struct ethtool_ringparam *ring,
3326 struct kernel_ethtool_ringparam *kernel_ring,
3327 struct netlink_ext_ack *extack)
3329 struct macb *bp = netdev_priv(netdev);
3331 ring->rx_max_pending = MAX_RX_RING_SIZE;
3332 ring->tx_max_pending = MAX_TX_RING_SIZE;
3334 ring->rx_pending = bp->rx_ring_size;
3335 ring->tx_pending = bp->tx_ring_size;
3338 static int macb_set_ringparam(struct net_device *netdev,
3339 struct ethtool_ringparam *ring,
3340 struct kernel_ethtool_ringparam *kernel_ring,
3341 struct netlink_ext_ack *extack)
3343 struct macb *bp = netdev_priv(netdev);
3344 u32 new_rx_size, new_tx_size;
3345 unsigned int reset = 0;
3347 if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending))
3350 new_rx_size = clamp_t(u32, ring->rx_pending,
3351 MIN_RX_RING_SIZE, MAX_RX_RING_SIZE);
3352 new_rx_size = roundup_pow_of_two(new_rx_size);
3354 new_tx_size = clamp_t(u32, ring->tx_pending,
3355 MIN_TX_RING_SIZE, MAX_TX_RING_SIZE);
3356 new_tx_size = roundup_pow_of_two(new_tx_size);
3358 if ((new_tx_size == bp->tx_ring_size) &&
3359 (new_rx_size == bp->rx_ring_size)) {
3364 if (netif_running(bp->dev)) {
3366 macb_close(bp->dev);
3369 bp->rx_ring_size = new_rx_size;
3370 bp->tx_ring_size = new_tx_size;
3378 #ifdef CONFIG_MACB_USE_HWSTAMP
3379 static unsigned int gem_get_tsu_rate(struct macb *bp)
3381 struct clk *tsu_clk;
3382 unsigned int tsu_rate;
3384 tsu_clk = devm_clk_get(&bp->pdev->dev, "tsu_clk");
3385 if (!IS_ERR(tsu_clk))
3386 tsu_rate = clk_get_rate(tsu_clk);
3387 /* try pclk instead */
3388 else if (!IS_ERR(bp->pclk)) {
3390 tsu_rate = clk_get_rate(tsu_clk);
3396 static s32 gem_get_ptp_max_adj(void)
3401 static int gem_get_ts_info(struct net_device *dev,
3402 struct kernel_ethtool_ts_info *info)
3404 struct macb *bp = netdev_priv(dev);
3406 if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0) {
3407 ethtool_op_get_ts_info(dev, info);
3411 info->so_timestamping =
3412 SOF_TIMESTAMPING_TX_SOFTWARE |
3413 SOF_TIMESTAMPING_RX_SOFTWARE |
3414 SOF_TIMESTAMPING_SOFTWARE |
3415 SOF_TIMESTAMPING_TX_HARDWARE |
3416 SOF_TIMESTAMPING_RX_HARDWARE |
3417 SOF_TIMESTAMPING_RAW_HARDWARE;
3419 (1 << HWTSTAMP_TX_ONESTEP_SYNC) |
3420 (1 << HWTSTAMP_TX_OFF) |
3421 (1 << HWTSTAMP_TX_ON);
3423 (1 << HWTSTAMP_FILTER_NONE) |
3424 (1 << HWTSTAMP_FILTER_ALL);
3426 info->phc_index = bp->ptp_clock ? ptp_clock_index(bp->ptp_clock) : -1;
3431 static struct macb_ptp_info gem_ptp_info = {
3432 .ptp_init = gem_ptp_init,
3433 .ptp_remove = gem_ptp_remove,
3434 .get_ptp_max_adj = gem_get_ptp_max_adj,
3435 .get_tsu_rate = gem_get_tsu_rate,
3436 .get_ts_info = gem_get_ts_info,
3437 .get_hwtst = gem_get_hwtst,
3438 .set_hwtst = gem_set_hwtst,
3442 static int macb_get_ts_info(struct net_device *netdev,
3443 struct kernel_ethtool_ts_info *info)
3445 struct macb *bp = netdev_priv(netdev);
3448 return bp->ptp_info->get_ts_info(netdev, info);
3450 return ethtool_op_get_ts_info(netdev, info);
3453 static void gem_enable_flow_filters(struct macb *bp, bool enable)
3455 struct net_device *netdev = bp->dev;
3456 struct ethtool_rx_fs_item *item;
3460 if (!(netdev->features & NETIF_F_NTUPLE))
3463 num_t2_scr = GEM_BFEXT(T2SCR, gem_readl(bp, DCFG8));
3465 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3466 struct ethtool_rx_flow_spec *fs = &item->fs;
3467 struct ethtool_tcpip4_spec *tp4sp_m;
3469 if (fs->location >= num_t2_scr)
3472 t2_scr = gem_readl_n(bp, SCRT2, fs->location);
3474 /* enable/disable screener regs for the flow entry */
3475 t2_scr = GEM_BFINS(ETHTEN, enable, t2_scr);
3477 /* only enable fields with no masking */
3478 tp4sp_m = &(fs->m_u.tcp_ip4_spec);
3480 if (enable && (tp4sp_m->ip4src == 0xFFFFFFFF))
3481 t2_scr = GEM_BFINS(CMPAEN, 1, t2_scr);
3483 t2_scr = GEM_BFINS(CMPAEN, 0, t2_scr);
3485 if (enable && (tp4sp_m->ip4dst == 0xFFFFFFFF))
3486 t2_scr = GEM_BFINS(CMPBEN, 1, t2_scr);
3488 t2_scr = GEM_BFINS(CMPBEN, 0, t2_scr);
3490 if (enable && ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF)))
3491 t2_scr = GEM_BFINS(CMPCEN, 1, t2_scr);
3493 t2_scr = GEM_BFINS(CMPCEN, 0, t2_scr);
3495 gem_writel_n(bp, SCRT2, fs->location, t2_scr);
3499 static void gem_prog_cmp_regs(struct macb *bp, struct ethtool_rx_flow_spec *fs)
3501 struct ethtool_tcpip4_spec *tp4sp_v, *tp4sp_m;
3502 uint16_t index = fs->location;
3508 if (!macb_is_gem(bp))
3511 tp4sp_v = &(fs->h_u.tcp_ip4_spec);
3512 tp4sp_m = &(fs->m_u.tcp_ip4_spec);
3514 /* ignore field if any masking set */
3515 if (tp4sp_m->ip4src == 0xFFFFFFFF) {
3516 /* 1st compare reg - IP source address */
3519 w0 = tp4sp_v->ip4src;
3520 w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
3521 w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1);
3522 w1 = GEM_BFINS(T2OFST, ETYPE_SRCIP_OFFSET, w1);
3523 gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w0);
3524 gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w1);
3528 /* ignore field if any masking set */
3529 if (tp4sp_m->ip4dst == 0xFFFFFFFF) {
3530 /* 2nd compare reg - IP destination address */
3533 w0 = tp4sp_v->ip4dst;
3534 w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
3535 w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1);
3536 w1 = GEM_BFINS(T2OFST, ETYPE_DSTIP_OFFSET, w1);
3537 gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4DST_CMP(index)), w0);
3538 gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4DST_CMP(index)), w1);
3542 /* ignore both port fields if masking set in both */
3543 if ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF)) {
3544 /* 3rd compare reg - source port, destination port */
3547 w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_IPHDR, w1);
3548 if (tp4sp_m->psrc == tp4sp_m->pdst) {
3549 w0 = GEM_BFINS(T2MASK, tp4sp_v->psrc, w0);
3550 w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0);
3551 w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */
3552 w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1);
3554 /* only one port definition */
3555 w1 = GEM_BFINS(T2DISMSK, 0, w1); /* 16-bit compare */
3556 w0 = GEM_BFINS(T2MASK, 0xFFFF, w0);
3557 if (tp4sp_m->psrc == 0xFFFF) { /* src port */
3558 w0 = GEM_BFINS(T2CMP, tp4sp_v->psrc, w0);
3559 w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1);
3560 } else { /* dst port */
3561 w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0);
3562 w1 = GEM_BFINS(T2OFST, IPHDR_DSTPORT_OFFSET, w1);
3565 gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_PORT_CMP(index)), w0);
3566 gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_PORT_CMP(index)), w1);
3571 t2_scr = GEM_BFINS(QUEUE, (fs->ring_cookie) & 0xFF, t2_scr);
3572 t2_scr = GEM_BFINS(ETHT2IDX, SCRT2_ETHT, t2_scr);
3574 t2_scr = GEM_BFINS(CMPA, GEM_IP4SRC_CMP(index), t2_scr);
3576 t2_scr = GEM_BFINS(CMPB, GEM_IP4DST_CMP(index), t2_scr);
3578 t2_scr = GEM_BFINS(CMPC, GEM_PORT_CMP(index), t2_scr);
3579 gem_writel_n(bp, SCRT2, index, t2_scr);
3582 static int gem_add_flow_filter(struct net_device *netdev,
3583 struct ethtool_rxnfc *cmd)
3585 struct macb *bp = netdev_priv(netdev);
3586 struct ethtool_rx_flow_spec *fs = &cmd->fs;
3587 struct ethtool_rx_fs_item *item, *newfs;
3588 unsigned long flags;
3592 newfs = kmalloc(sizeof(*newfs), GFP_KERNEL);
3595 memcpy(&newfs->fs, fs, sizeof(newfs->fs));
3598 "Adding flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n",
3599 fs->flow_type, (int)fs->ring_cookie, fs->location,
3600 htonl(fs->h_u.tcp_ip4_spec.ip4src),
3601 htonl(fs->h_u.tcp_ip4_spec.ip4dst),
3602 be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc),
3603 be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst));
3605 spin_lock_irqsave(&bp->rx_fs_lock, flags);
3607 /* find correct place to add in list */
3608 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3609 if (item->fs.location > newfs->fs.location) {
3610 list_add_tail(&newfs->list, &item->list);
3613 } else if (item->fs.location == fs->location) {
3614 netdev_err(netdev, "Rule not added: location %d not free!\n",
3621 list_add_tail(&newfs->list, &bp->rx_fs_list.list);
3623 gem_prog_cmp_regs(bp, fs);
3624 bp->rx_fs_list.count++;
3625 /* enable filtering if NTUPLE on */
3626 gem_enable_flow_filters(bp, 1);
3628 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3632 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3637 static int gem_del_flow_filter(struct net_device *netdev,
3638 struct ethtool_rxnfc *cmd)
3640 struct macb *bp = netdev_priv(netdev);
3641 struct ethtool_rx_fs_item *item;
3642 struct ethtool_rx_flow_spec *fs;
3643 unsigned long flags;
3645 spin_lock_irqsave(&bp->rx_fs_lock, flags);
3647 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3648 if (item->fs.location == cmd->fs.location) {
3649 /* disable screener regs for the flow entry */
3652 "Deleting flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n",
3653 fs->flow_type, (int)fs->ring_cookie, fs->location,
3654 htonl(fs->h_u.tcp_ip4_spec.ip4src),
3655 htonl(fs->h_u.tcp_ip4_spec.ip4dst),
3656 be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc),
3657 be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst));
3659 gem_writel_n(bp, SCRT2, fs->location, 0);
3661 list_del(&item->list);
3662 bp->rx_fs_list.count--;
3663 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3669 spin_unlock_irqrestore(&bp->rx_fs_lock, flags);
3673 static int gem_get_flow_entry(struct net_device *netdev,
3674 struct ethtool_rxnfc *cmd)
3676 struct macb *bp = netdev_priv(netdev);
3677 struct ethtool_rx_fs_item *item;
3679 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3680 if (item->fs.location == cmd->fs.location) {
3681 memcpy(&cmd->fs, &item->fs, sizeof(cmd->fs));
3688 static int gem_get_all_flow_entries(struct net_device *netdev,
3689 struct ethtool_rxnfc *cmd, u32 *rule_locs)
3691 struct macb *bp = netdev_priv(netdev);
3692 struct ethtool_rx_fs_item *item;
3695 list_for_each_entry(item, &bp->rx_fs_list.list, list) {
3696 if (cnt == cmd->rule_cnt)
3698 rule_locs[cnt] = item->fs.location;
3701 cmd->data = bp->max_tuples;
3702 cmd->rule_cnt = cnt;
3707 static int gem_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd,
3710 struct macb *bp = netdev_priv(netdev);
3714 case ETHTOOL_GRXRINGS:
3715 cmd->data = bp->num_queues;
3717 case ETHTOOL_GRXCLSRLCNT:
3718 cmd->rule_cnt = bp->rx_fs_list.count;
3720 case ETHTOOL_GRXCLSRULE:
3721 ret = gem_get_flow_entry(netdev, cmd);
3723 case ETHTOOL_GRXCLSRLALL:
3724 ret = gem_get_all_flow_entries(netdev, cmd, rule_locs);
3728 "Command parameter %d is not supported\n", cmd->cmd);
3735 static int gem_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd)
3737 struct macb *bp = netdev_priv(netdev);
3741 case ETHTOOL_SRXCLSRLINS:
3742 if ((cmd->fs.location >= bp->max_tuples)
3743 || (cmd->fs.ring_cookie >= bp->num_queues)) {
3747 ret = gem_add_flow_filter(netdev, cmd);
3749 case ETHTOOL_SRXCLSRLDEL:
3750 ret = gem_del_flow_filter(netdev, cmd);
3754 "Command parameter %d is not supported\n", cmd->cmd);
3761 static const struct ethtool_ops macb_ethtool_ops = {
3762 .get_regs_len = macb_get_regs_len,
3763 .get_regs = macb_get_regs,
3764 .get_link = ethtool_op_get_link,
3765 .get_ts_info = ethtool_op_get_ts_info,
3766 .get_wol = macb_get_wol,
3767 .set_wol = macb_set_wol,
3768 .get_link_ksettings = macb_get_link_ksettings,
3769 .set_link_ksettings = macb_set_link_ksettings,
3770 .get_ringparam = macb_get_ringparam,
3771 .set_ringparam = macb_set_ringparam,
3774 static const struct ethtool_ops gem_ethtool_ops = {
3775 .get_regs_len = macb_get_regs_len,
3776 .get_regs = macb_get_regs,
3777 .get_wol = macb_get_wol,
3778 .set_wol = macb_set_wol,
3779 .get_link = ethtool_op_get_link,
3780 .get_ts_info = macb_get_ts_info,
3781 .get_ethtool_stats = gem_get_ethtool_stats,
3782 .get_strings = gem_get_ethtool_strings,
3783 .get_sset_count = gem_get_sset_count,
3784 .get_link_ksettings = macb_get_link_ksettings,
3785 .set_link_ksettings = macb_set_link_ksettings,
3786 .get_ringparam = macb_get_ringparam,
3787 .set_ringparam = macb_set_ringparam,
3788 .get_rxnfc = gem_get_rxnfc,
3789 .set_rxnfc = gem_set_rxnfc,
3792 static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
3794 struct macb *bp = netdev_priv(dev);
3796 if (!netif_running(dev))
3799 return phylink_mii_ioctl(bp->phylink, rq, cmd);
3802 static int macb_hwtstamp_get(struct net_device *dev,
3803 struct kernel_hwtstamp_config *cfg)
3805 struct macb *bp = netdev_priv(dev);
3807 if (!netif_running(dev))
3813 return bp->ptp_info->get_hwtst(dev, cfg);
3816 static int macb_hwtstamp_set(struct net_device *dev,
3817 struct kernel_hwtstamp_config *cfg,
3818 struct netlink_ext_ack *extack)
3820 struct macb *bp = netdev_priv(dev);
3822 if (!netif_running(dev))
3828 return bp->ptp_info->set_hwtst(dev, cfg, extack);
3831 static inline void macb_set_txcsum_feature(struct macb *bp,
3832 netdev_features_t features)
3836 if (!macb_is_gem(bp))
3839 val = gem_readl(bp, DMACFG);
3840 if (features & NETIF_F_HW_CSUM)
3841 val |= GEM_BIT(TXCOEN);
3843 val &= ~GEM_BIT(TXCOEN);
3845 gem_writel(bp, DMACFG, val);
3848 static inline void macb_set_rxcsum_feature(struct macb *bp,
3849 netdev_features_t features)
3851 struct net_device *netdev = bp->dev;
3854 if (!macb_is_gem(bp))
3857 val = gem_readl(bp, NCFGR);
3858 if ((features & NETIF_F_RXCSUM) && !(netdev->flags & IFF_PROMISC))
3859 val |= GEM_BIT(RXCOEN);
3861 val &= ~GEM_BIT(RXCOEN);
3863 gem_writel(bp, NCFGR, val);
3866 static inline void macb_set_rxflow_feature(struct macb *bp,
3867 netdev_features_t features)
3869 if (!macb_is_gem(bp))
3872 gem_enable_flow_filters(bp, !!(features & NETIF_F_NTUPLE));
3875 static int macb_set_features(struct net_device *netdev,
3876 netdev_features_t features)
3878 struct macb *bp = netdev_priv(netdev);
3879 netdev_features_t changed = features ^ netdev->features;
3881 /* TX checksum offload */
3882 if (changed & NETIF_F_HW_CSUM)
3883 macb_set_txcsum_feature(bp, features);
3885 /* RX checksum offload */
3886 if (changed & NETIF_F_RXCSUM)
3887 macb_set_rxcsum_feature(bp, features);
3889 /* RX Flow Filters */
3890 if (changed & NETIF_F_NTUPLE)
3891 macb_set_rxflow_feature(bp, features);
3896 static void macb_restore_features(struct macb *bp)
3898 struct net_device *netdev = bp->dev;
3899 netdev_features_t features = netdev->features;
3900 struct ethtool_rx_fs_item *item;
3902 /* TX checksum offload */
3903 macb_set_txcsum_feature(bp, features);
3905 /* RX checksum offload */
3906 macb_set_rxcsum_feature(bp, features);
3908 /* RX Flow Filters */
3909 list_for_each_entry(item, &bp->rx_fs_list.list, list)
3910 gem_prog_cmp_regs(bp, &item->fs);
3912 macb_set_rxflow_feature(bp, features);
3915 static const struct net_device_ops macb_netdev_ops = {
3916 .ndo_open = macb_open,
3917 .ndo_stop = macb_close,
3918 .ndo_start_xmit = macb_start_xmit,
3919 .ndo_set_rx_mode = macb_set_rx_mode,
3920 .ndo_get_stats = macb_get_stats,
3921 .ndo_eth_ioctl = macb_ioctl,
3922 .ndo_validate_addr = eth_validate_addr,
3923 .ndo_change_mtu = macb_change_mtu,
3924 .ndo_set_mac_address = macb_set_mac_addr,
3925 #ifdef CONFIG_NET_POLL_CONTROLLER
3926 .ndo_poll_controller = macb_poll_controller,
3928 .ndo_set_features = macb_set_features,
3929 .ndo_features_check = macb_features_check,
3930 .ndo_hwtstamp_set = macb_hwtstamp_set,
3931 .ndo_hwtstamp_get = macb_hwtstamp_get,
3934 /* Configure peripheral capabilities according to device tree
3935 * and integration options used
3937 static void macb_configure_caps(struct macb *bp,
3938 const struct macb_config *dt_conf)
3943 bp->caps = dt_conf->caps;
3945 if (hw_is_gem(bp->regs, bp->native_io)) {
3946 bp->caps |= MACB_CAPS_MACB_IS_GEM;
3948 dcfg = gem_readl(bp, DCFG1);
3949 if (GEM_BFEXT(IRQCOR, dcfg) == 0)
3950 bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE;
3951 if (GEM_BFEXT(NO_PCS, dcfg) == 0)
3952 bp->caps |= MACB_CAPS_PCS;
3953 dcfg = gem_readl(bp, DCFG12);
3954 if (GEM_BFEXT(HIGH_SPEED, dcfg) == 1)
3955 bp->caps |= MACB_CAPS_HIGH_SPEED;
3956 dcfg = gem_readl(bp, DCFG2);
3957 if ((dcfg & (GEM_BIT(RX_PKT_BUFF) | GEM_BIT(TX_PKT_BUFF))) == 0)
3958 bp->caps |= MACB_CAPS_FIFO_MODE;
3959 if (gem_has_ptp(bp)) {
3960 if (!GEM_BFEXT(TSU, gem_readl(bp, DCFG5)))
3961 dev_err(&bp->pdev->dev,
3962 "GEM doesn't support hardware ptp.\n");
3964 #ifdef CONFIG_MACB_USE_HWSTAMP
3965 bp->hw_dma_cap |= HW_DMA_CAP_PTP;
3966 bp->ptp_info = &gem_ptp_info;
3972 dev_dbg(&bp->pdev->dev, "Cadence caps 0x%08x\n", bp->caps);
3975 static void macb_probe_queues(void __iomem *mem,
3977 unsigned int *queue_mask,
3978 unsigned int *num_queues)
3983 /* is it macb or gem ?
3985 * We need to read directly from the hardware here because
3986 * we are early in the probe process and don't have the
3987 * MACB_CAPS_MACB_IS_GEM flag positioned
3989 if (!hw_is_gem(mem, native_io))
3992 /* bit 0 is never set but queue 0 always exists */
3993 *queue_mask |= readl_relaxed(mem + GEM_DCFG6) & 0xff;
3994 *num_queues = hweight32(*queue_mask);
3997 static void macb_clks_disable(struct clk *pclk, struct clk *hclk, struct clk *tx_clk,
3998 struct clk *rx_clk, struct clk *tsu_clk)
4000 struct clk_bulk_data clks[] = {
4001 { .clk = tsu_clk, },
4008 clk_bulk_disable_unprepare(ARRAY_SIZE(clks), clks);
4011 static int macb_clk_init(struct platform_device *pdev, struct clk **pclk,
4012 struct clk **hclk, struct clk **tx_clk,
4013 struct clk **rx_clk, struct clk **tsu_clk)
4015 struct macb_platform_data *pdata;
4018 pdata = dev_get_platdata(&pdev->dev);
4020 *pclk = pdata->pclk;
4021 *hclk = pdata->hclk;
4023 *pclk = devm_clk_get(&pdev->dev, "pclk");
4024 *hclk = devm_clk_get(&pdev->dev, "hclk");
4027 if (IS_ERR_OR_NULL(*pclk))
4028 return dev_err_probe(&pdev->dev,
4029 IS_ERR(*pclk) ? PTR_ERR(*pclk) : -ENODEV,
4030 "failed to get pclk\n");
4032 if (IS_ERR_OR_NULL(*hclk))
4033 return dev_err_probe(&pdev->dev,
4034 IS_ERR(*hclk) ? PTR_ERR(*hclk) : -ENODEV,
4035 "failed to get hclk\n");
4037 *tx_clk = devm_clk_get_optional(&pdev->dev, "tx_clk");
4038 if (IS_ERR(*tx_clk))
4039 return PTR_ERR(*tx_clk);
4041 *rx_clk = devm_clk_get_optional(&pdev->dev, "rx_clk");
4042 if (IS_ERR(*rx_clk))
4043 return PTR_ERR(*rx_clk);
4045 *tsu_clk = devm_clk_get_optional(&pdev->dev, "tsu_clk");
4046 if (IS_ERR(*tsu_clk))
4047 return PTR_ERR(*tsu_clk);
4049 err = clk_prepare_enable(*pclk);
4051 dev_err(&pdev->dev, "failed to enable pclk (%d)\n", err);
4055 err = clk_prepare_enable(*hclk);
4057 dev_err(&pdev->dev, "failed to enable hclk (%d)\n", err);
4058 goto err_disable_pclk;
4061 err = clk_prepare_enable(*tx_clk);
4063 dev_err(&pdev->dev, "failed to enable tx_clk (%d)\n", err);
4064 goto err_disable_hclk;
4067 err = clk_prepare_enable(*rx_clk);
4069 dev_err(&pdev->dev, "failed to enable rx_clk (%d)\n", err);
4070 goto err_disable_txclk;
4073 err = clk_prepare_enable(*tsu_clk);
4075 dev_err(&pdev->dev, "failed to enable tsu_clk (%d)\n", err);
4076 goto err_disable_rxclk;
4082 clk_disable_unprepare(*rx_clk);
4085 clk_disable_unprepare(*tx_clk);
4088 clk_disable_unprepare(*hclk);
4091 clk_disable_unprepare(*pclk);
4096 static int macb_init(struct platform_device *pdev)
4098 struct net_device *dev = platform_get_drvdata(pdev);
4099 unsigned int hw_q, q;
4100 struct macb *bp = netdev_priv(dev);
4101 struct macb_queue *queue;
4105 bp->tx_ring_size = DEFAULT_TX_RING_SIZE;
4106 bp->rx_ring_size = DEFAULT_RX_RING_SIZE;
4108 /* set the queue register mapping once for all: queue0 has a special
4109 * register mapping but we don't want to test the queue index then
4110 * compute the corresponding register offset at run time.
4112 for (hw_q = 0, q = 0; hw_q < MACB_MAX_QUEUES; ++hw_q) {
4113 if (!(bp->queue_mask & (1 << hw_q)))
4116 queue = &bp->queues[q];
4118 spin_lock_init(&queue->tx_ptr_lock);
4119 netif_napi_add(dev, &queue->napi_rx, macb_rx_poll);
4120 netif_napi_add(dev, &queue->napi_tx, macb_tx_poll);
4122 queue->ISR = GEM_ISR(hw_q - 1);
4123 queue->IER = GEM_IER(hw_q - 1);
4124 queue->IDR = GEM_IDR(hw_q - 1);
4125 queue->IMR = GEM_IMR(hw_q - 1);
4126 queue->TBQP = GEM_TBQP(hw_q - 1);
4127 queue->RBQP = GEM_RBQP(hw_q - 1);
4128 queue->RBQS = GEM_RBQS(hw_q - 1);
4129 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
4130 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
4131 queue->TBQPH = GEM_TBQPH(hw_q - 1);
4132 queue->RBQPH = GEM_RBQPH(hw_q - 1);
4136 /* queue0 uses legacy registers */
4137 queue->ISR = MACB_ISR;
4138 queue->IER = MACB_IER;
4139 queue->IDR = MACB_IDR;
4140 queue->IMR = MACB_IMR;
4141 queue->TBQP = MACB_TBQP;
4142 queue->RBQP = MACB_RBQP;
4143 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
4144 if (bp->hw_dma_cap & HW_DMA_CAP_64B) {
4145 queue->TBQPH = MACB_TBQPH;
4146 queue->RBQPH = MACB_RBQPH;
4151 /* get irq: here we use the linux queue index, not the hardware
4152 * queue index. the queue irq definitions in the device tree
4153 * must remove the optional gaps that could exist in the
4154 * hardware queue mask.
4156 queue->irq = platform_get_irq(pdev, q);
4157 err = devm_request_irq(&pdev->dev, queue->irq, macb_interrupt,
4158 IRQF_SHARED, dev->name, queue);
4161 "Unable to request IRQ %d (error %d)\n",
4166 INIT_WORK(&queue->tx_error_task, macb_tx_error_task);
4170 dev->netdev_ops = &macb_netdev_ops;
4172 /* setup appropriated routines according to adapter type */
4173 if (macb_is_gem(bp)) {
4174 bp->macbgem_ops.mog_alloc_rx_buffers = gem_alloc_rx_buffers;
4175 bp->macbgem_ops.mog_free_rx_buffers = gem_free_rx_buffers;
4176 bp->macbgem_ops.mog_init_rings = gem_init_rings;
4177 bp->macbgem_ops.mog_rx = gem_rx;
4178 dev->ethtool_ops = &gem_ethtool_ops;
4180 bp->macbgem_ops.mog_alloc_rx_buffers = macb_alloc_rx_buffers;
4181 bp->macbgem_ops.mog_free_rx_buffers = macb_free_rx_buffers;
4182 bp->macbgem_ops.mog_init_rings = macb_init_rings;
4183 bp->macbgem_ops.mog_rx = macb_rx;
4184 dev->ethtool_ops = &macb_ethtool_ops;
4187 dev->priv_flags |= IFF_LIVE_ADDR_CHANGE;
4190 dev->hw_features = NETIF_F_SG;
4192 /* Check LSO capability */
4193 if (GEM_BFEXT(PBUF_LSO, gem_readl(bp, DCFG6)))
4194 dev->hw_features |= MACB_NETIF_LSO;
4196 /* Checksum offload is only available on gem with packet buffer */
4197 if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE))
4198 dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM;
4199 if (bp->caps & MACB_CAPS_SG_DISABLED)
4200 dev->hw_features &= ~NETIF_F_SG;
4201 dev->features = dev->hw_features;
4203 /* Check RX Flow Filters support.
4204 * Max Rx flows set by availability of screeners & compare regs:
4205 * each 4-tuple define requires 1 T2 screener reg + 3 compare regs
4207 reg = gem_readl(bp, DCFG8);
4208 bp->max_tuples = min((GEM_BFEXT(SCR2CMP, reg) / 3),
4209 GEM_BFEXT(T2SCR, reg));
4210 INIT_LIST_HEAD(&bp->rx_fs_list.list);
4211 if (bp->max_tuples > 0) {
4212 /* also needs one ethtype match to check IPv4 */
4213 if (GEM_BFEXT(SCR2ETH, reg) > 0) {
4214 /* program this reg now */
4216 reg = GEM_BFINS(ETHTCMP, (uint16_t)ETH_P_IP, reg);
4217 gem_writel_n(bp, ETHT, SCRT2_ETHT, reg);
4218 /* Filtering is supported in hw but don't enable it in kernel now */
4219 dev->hw_features |= NETIF_F_NTUPLE;
4220 /* init Rx flow definitions */
4221 bp->rx_fs_list.count = 0;
4222 spin_lock_init(&bp->rx_fs_lock);
4227 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) {
4229 if (phy_interface_mode_is_rgmii(bp->phy_interface))
4230 val = bp->usrio->rgmii;
4231 else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII &&
4232 (bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII))
4233 val = bp->usrio->rmii;
4234 else if (!(bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII))
4235 val = bp->usrio->mii;
4237 if (bp->caps & MACB_CAPS_USRIO_HAS_CLKEN)
4238 val |= bp->usrio->refclk;
4240 macb_or_gem_writel(bp, USRIO, val);
4243 /* Set MII management clock divider */
4244 val = macb_mdc_clk_div(bp);
4245 val |= macb_dbw(bp);
4246 if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII)
4247 val |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL);
4248 macb_writel(bp, NCFGR, val);
4253 static const struct macb_usrio_config macb_default_usrio = {
4254 .mii = MACB_BIT(MII),
4255 .rmii = MACB_BIT(RMII),
4256 .rgmii = GEM_BIT(RGMII),
4257 .refclk = MACB_BIT(CLKEN),
4260 #if defined(CONFIG_OF)
4261 /* 1518 rounded up */
4262 #define AT91ETHER_MAX_RBUFF_SZ 0x600
4263 /* max number of receive buffers */
4264 #define AT91ETHER_MAX_RX_DESCR 9
4266 static struct sifive_fu540_macb_mgmt *mgmt;
4268 static int at91ether_alloc_coherent(struct macb *lp)
4270 struct macb_queue *q = &lp->queues[0];
4272 q->rx_ring = dma_alloc_coherent(&lp->pdev->dev,
4273 (AT91ETHER_MAX_RX_DESCR *
4274 macb_dma_desc_get_size(lp)),
4275 &q->rx_ring_dma, GFP_KERNEL);
4279 q->rx_buffers = dma_alloc_coherent(&lp->pdev->dev,
4280 AT91ETHER_MAX_RX_DESCR *
4281 AT91ETHER_MAX_RBUFF_SZ,
4282 &q->rx_buffers_dma, GFP_KERNEL);
4283 if (!q->rx_buffers) {
4284 dma_free_coherent(&lp->pdev->dev,
4285 AT91ETHER_MAX_RX_DESCR *
4286 macb_dma_desc_get_size(lp),
4287 q->rx_ring, q->rx_ring_dma);
4295 static void at91ether_free_coherent(struct macb *lp)
4297 struct macb_queue *q = &lp->queues[0];
4300 dma_free_coherent(&lp->pdev->dev,
4301 AT91ETHER_MAX_RX_DESCR *
4302 macb_dma_desc_get_size(lp),
4303 q->rx_ring, q->rx_ring_dma);
4307 if (q->rx_buffers) {
4308 dma_free_coherent(&lp->pdev->dev,
4309 AT91ETHER_MAX_RX_DESCR *
4310 AT91ETHER_MAX_RBUFF_SZ,
4311 q->rx_buffers, q->rx_buffers_dma);
4312 q->rx_buffers = NULL;
4316 /* Initialize and start the Receiver and Transmit subsystems */
4317 static int at91ether_start(struct macb *lp)
4319 struct macb_queue *q = &lp->queues[0];
4320 struct macb_dma_desc *desc;
4325 ret = at91ether_alloc_coherent(lp);
4329 addr = q->rx_buffers_dma;
4330 for (i = 0; i < AT91ETHER_MAX_RX_DESCR; i++) {
4331 desc = macb_rx_desc(q, i);
4332 macb_set_addr(lp, desc, addr);
4334 addr += AT91ETHER_MAX_RBUFF_SZ;
4337 /* Set the Wrap bit on the last descriptor */
4338 desc->addr |= MACB_BIT(RX_WRAP);
4340 /* Reset buffer index */
4343 /* Program address of descriptor list in Rx Buffer Queue register */
4344 macb_writel(lp, RBQP, q->rx_ring_dma);
4346 /* Enable Receive and Transmit */
4347 ctl = macb_readl(lp, NCR);
4348 macb_writel(lp, NCR, ctl | MACB_BIT(RE) | MACB_BIT(TE));
4350 /* Enable MAC interrupts */
4351 macb_writel(lp, IER, MACB_BIT(RCOMP) |
4353 MACB_BIT(ISR_TUND) |
4356 MACB_BIT(ISR_ROVR) |
4362 static void at91ether_stop(struct macb *lp)
4366 /* Disable MAC interrupts */
4367 macb_writel(lp, IDR, MACB_BIT(RCOMP) |
4369 MACB_BIT(ISR_TUND) |
4372 MACB_BIT(ISR_ROVR) |
4375 /* Disable Receiver and Transmitter */
4376 ctl = macb_readl(lp, NCR);
4377 macb_writel(lp, NCR, ctl & ~(MACB_BIT(TE) | MACB_BIT(RE)));
4379 /* Free resources. */
4380 at91ether_free_coherent(lp);
4383 /* Open the ethernet interface */
4384 static int at91ether_open(struct net_device *dev)
4386 struct macb *lp = netdev_priv(dev);
4390 ret = pm_runtime_resume_and_get(&lp->pdev->dev);
4394 /* Clear internal statistics */
4395 ctl = macb_readl(lp, NCR);
4396 macb_writel(lp, NCR, ctl | MACB_BIT(CLRSTAT));
4398 macb_set_hwaddr(lp);
4400 ret = at91ether_start(lp);
4404 ret = macb_phylink_connect(lp);
4408 netif_start_queue(dev);
4415 pm_runtime_put_sync(&lp->pdev->dev);
4419 /* Close the interface */
4420 static int at91ether_close(struct net_device *dev)
4422 struct macb *lp = netdev_priv(dev);
4424 netif_stop_queue(dev);
4426 phylink_stop(lp->phylink);
4427 phylink_disconnect_phy(lp->phylink);
4431 return pm_runtime_put(&lp->pdev->dev);
4434 /* Transmit packet */
4435 static netdev_tx_t at91ether_start_xmit(struct sk_buff *skb,
4436 struct net_device *dev)
4438 struct macb *lp = netdev_priv(dev);
4440 if (macb_readl(lp, TSR) & MACB_BIT(RM9200_BNQ)) {
4443 netif_stop_queue(dev);
4445 /* Store packet information (to free when Tx completed) */
4446 lp->rm9200_txq[desc].skb = skb;
4447 lp->rm9200_txq[desc].size = skb->len;
4448 lp->rm9200_txq[desc].mapping = dma_map_single(&lp->pdev->dev, skb->data,
4449 skb->len, DMA_TO_DEVICE);
4450 if (dma_mapping_error(&lp->pdev->dev, lp->rm9200_txq[desc].mapping)) {
4451 dev_kfree_skb_any(skb);
4452 dev->stats.tx_dropped++;
4453 netdev_err(dev, "%s: DMA mapping error\n", __func__);
4454 return NETDEV_TX_OK;
4457 /* Set address of the data in the Transmit Address register */
4458 macb_writel(lp, TAR, lp->rm9200_txq[desc].mapping);
4459 /* Set length of the packet in the Transmit Control register */
4460 macb_writel(lp, TCR, skb->len);
4463 netdev_err(dev, "%s called, but device is busy!\n", __func__);
4464 return NETDEV_TX_BUSY;
4467 return NETDEV_TX_OK;
4470 /* Extract received frame from buffer descriptors and sent to upper layers.
4471 * (Called from interrupt context)
4473 static void at91ether_rx(struct net_device *dev)
4475 struct macb *lp = netdev_priv(dev);
4476 struct macb_queue *q = &lp->queues[0];
4477 struct macb_dma_desc *desc;
4478 unsigned char *p_recv;
4479 struct sk_buff *skb;
4480 unsigned int pktlen;
4482 desc = macb_rx_desc(q, q->rx_tail);
4483 while (desc->addr & MACB_BIT(RX_USED)) {
4484 p_recv = q->rx_buffers + q->rx_tail * AT91ETHER_MAX_RBUFF_SZ;
4485 pktlen = MACB_BF(RX_FRMLEN, desc->ctrl);
4486 skb = netdev_alloc_skb(dev, pktlen + 2);
4488 skb_reserve(skb, 2);
4489 skb_put_data(skb, p_recv, pktlen);
4491 skb->protocol = eth_type_trans(skb, dev);
4492 dev->stats.rx_packets++;
4493 dev->stats.rx_bytes += pktlen;
4496 dev->stats.rx_dropped++;
4499 if (desc->ctrl & MACB_BIT(RX_MHASH_MATCH))
4500 dev->stats.multicast++;
4502 /* reset ownership bit */
4503 desc->addr &= ~MACB_BIT(RX_USED);
4505 /* wrap after last buffer */
4506 if (q->rx_tail == AT91ETHER_MAX_RX_DESCR - 1)
4511 desc = macb_rx_desc(q, q->rx_tail);
4515 /* MAC interrupt handler */
4516 static irqreturn_t at91ether_interrupt(int irq, void *dev_id)
4518 struct net_device *dev = dev_id;
4519 struct macb *lp = netdev_priv(dev);
4523 /* MAC Interrupt Status register indicates what interrupts are pending.
4524 * It is automatically cleared once read.
4526 intstatus = macb_readl(lp, ISR);
4528 /* Receive complete */
4529 if (intstatus & MACB_BIT(RCOMP))
4532 /* Transmit complete */
4533 if (intstatus & MACB_BIT(TCOMP)) {
4534 /* The TCOM bit is set even if the transmission failed */
4535 if (intstatus & (MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE)))
4536 dev->stats.tx_errors++;
4539 if (lp->rm9200_txq[desc].skb) {
4540 dev_consume_skb_irq(lp->rm9200_txq[desc].skb);
4541 lp->rm9200_txq[desc].skb = NULL;
4542 dma_unmap_single(&lp->pdev->dev, lp->rm9200_txq[desc].mapping,
4543 lp->rm9200_txq[desc].size, DMA_TO_DEVICE);
4544 dev->stats.tx_packets++;
4545 dev->stats.tx_bytes += lp->rm9200_txq[desc].size;
4547 netif_wake_queue(dev);
4550 /* Work-around for EMAC Errata section 41.3.1 */
4551 if (intstatus & MACB_BIT(RXUBR)) {
4552 ctl = macb_readl(lp, NCR);
4553 macb_writel(lp, NCR, ctl & ~MACB_BIT(RE));
4555 macb_writel(lp, NCR, ctl | MACB_BIT(RE));
4558 if (intstatus & MACB_BIT(ISR_ROVR))
4559 netdev_err(dev, "ROVR error\n");
4564 #ifdef CONFIG_NET_POLL_CONTROLLER
4565 static void at91ether_poll_controller(struct net_device *dev)
4567 unsigned long flags;
4569 local_irq_save(flags);
4570 at91ether_interrupt(dev->irq, dev);
4571 local_irq_restore(flags);
4575 static const struct net_device_ops at91ether_netdev_ops = {
4576 .ndo_open = at91ether_open,
4577 .ndo_stop = at91ether_close,
4578 .ndo_start_xmit = at91ether_start_xmit,
4579 .ndo_get_stats = macb_get_stats,
4580 .ndo_set_rx_mode = macb_set_rx_mode,
4581 .ndo_set_mac_address = eth_mac_addr,
4582 .ndo_eth_ioctl = macb_ioctl,
4583 .ndo_validate_addr = eth_validate_addr,
4584 #ifdef CONFIG_NET_POLL_CONTROLLER
4585 .ndo_poll_controller = at91ether_poll_controller,
4587 .ndo_hwtstamp_set = macb_hwtstamp_set,
4588 .ndo_hwtstamp_get = macb_hwtstamp_get,
4591 static int at91ether_clk_init(struct platform_device *pdev, struct clk **pclk,
4592 struct clk **hclk, struct clk **tx_clk,
4593 struct clk **rx_clk, struct clk **tsu_clk)
4602 *pclk = devm_clk_get(&pdev->dev, "ether_clk");
4604 return PTR_ERR(*pclk);
4606 err = clk_prepare_enable(*pclk);
4608 dev_err(&pdev->dev, "failed to enable pclk (%d)\n", err);
4615 static int at91ether_init(struct platform_device *pdev)
4617 struct net_device *dev = platform_get_drvdata(pdev);
4618 struct macb *bp = netdev_priv(dev);
4621 bp->queues[0].bp = bp;
4623 dev->netdev_ops = &at91ether_netdev_ops;
4624 dev->ethtool_ops = &macb_ethtool_ops;
4626 err = devm_request_irq(&pdev->dev, dev->irq, at91ether_interrupt,
4631 macb_writel(bp, NCR, 0);
4633 macb_writel(bp, NCFGR, MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG));
4638 static unsigned long fu540_macb_tx_recalc_rate(struct clk_hw *hw,
4639 unsigned long parent_rate)
4644 static long fu540_macb_tx_round_rate(struct clk_hw *hw, unsigned long rate,
4645 unsigned long *parent_rate)
4647 if (WARN_ON(rate < 2500000))
4649 else if (rate == 2500000)
4651 else if (WARN_ON(rate < 13750000))
4653 else if (WARN_ON(rate < 25000000))
4655 else if (rate == 25000000)
4657 else if (WARN_ON(rate < 75000000))
4659 else if (WARN_ON(rate < 125000000))
4661 else if (rate == 125000000)
4664 WARN_ON(rate > 125000000);
4669 static int fu540_macb_tx_set_rate(struct clk_hw *hw, unsigned long rate,
4670 unsigned long parent_rate)
4672 rate = fu540_macb_tx_round_rate(hw, rate, &parent_rate);
4673 if (rate != 125000000)
4674 iowrite32(1, mgmt->reg);
4676 iowrite32(0, mgmt->reg);
4682 static const struct clk_ops fu540_c000_ops = {
4683 .recalc_rate = fu540_macb_tx_recalc_rate,
4684 .round_rate = fu540_macb_tx_round_rate,
4685 .set_rate = fu540_macb_tx_set_rate,
4688 static int fu540_c000_clk_init(struct platform_device *pdev, struct clk **pclk,
4689 struct clk **hclk, struct clk **tx_clk,
4690 struct clk **rx_clk, struct clk **tsu_clk)
4692 struct clk_init_data init;
4695 err = macb_clk_init(pdev, pclk, hclk, tx_clk, rx_clk, tsu_clk);
4699 mgmt = devm_kzalloc(&pdev->dev, sizeof(*mgmt), GFP_KERNEL);
4702 goto err_disable_clks;
4705 init.name = "sifive-gemgxl-mgmt";
4706 init.ops = &fu540_c000_ops;
4708 init.num_parents = 0;
4711 mgmt->hw.init = &init;
4713 *tx_clk = devm_clk_register(&pdev->dev, &mgmt->hw);
4714 if (IS_ERR(*tx_clk)) {
4715 err = PTR_ERR(*tx_clk);
4716 goto err_disable_clks;
4719 err = clk_prepare_enable(*tx_clk);
4721 dev_err(&pdev->dev, "failed to enable tx_clk (%u)\n", err);
4723 goto err_disable_clks;
4725 dev_info(&pdev->dev, "Registered clk switch '%s'\n", init.name);
4731 macb_clks_disable(*pclk, *hclk, *tx_clk, *rx_clk, *tsu_clk);
4736 static int fu540_c000_init(struct platform_device *pdev)
4738 mgmt->reg = devm_platform_ioremap_resource(pdev, 1);
4739 if (IS_ERR(mgmt->reg))
4740 return PTR_ERR(mgmt->reg);
4742 return macb_init(pdev);
4745 static int init_reset_optional(struct platform_device *pdev)
4747 struct net_device *dev = platform_get_drvdata(pdev);
4748 struct macb *bp = netdev_priv(dev);
4751 if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) {
4752 /* Ensure PHY device used in SGMII mode is ready */
4753 bp->sgmii_phy = devm_phy_optional_get(&pdev->dev, NULL);
4755 if (IS_ERR(bp->sgmii_phy))
4756 return dev_err_probe(&pdev->dev, PTR_ERR(bp->sgmii_phy),
4757 "failed to get SGMII PHY\n");
4759 ret = phy_init(bp->sgmii_phy);
4761 return dev_err_probe(&pdev->dev, ret,
4762 "failed to init SGMII PHY\n");
4764 ret = zynqmp_pm_is_function_supported(PM_IOCTL, IOCTL_SET_GEM_CONFIG);
4768 ret = of_property_read_u32_array(pdev->dev.of_node, "power-domains",
4769 pm_info, ARRAY_SIZE(pm_info));
4771 dev_err(&pdev->dev, "Failed to read power management information\n");
4772 goto err_out_phy_exit;
4774 ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_FIXED, 0);
4776 goto err_out_phy_exit;
4778 ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_SGMII_MODE, 1);
4780 goto err_out_phy_exit;
4785 /* Fully reset controller at hardware level if mapped in device tree */
4786 ret = device_reset_optional(&pdev->dev);
4788 phy_exit(bp->sgmii_phy);
4789 return dev_err_probe(&pdev->dev, ret, "failed to reset controller");
4792 ret = macb_init(pdev);
4796 phy_exit(bp->sgmii_phy);
4801 static const struct macb_usrio_config sama7g5_usrio = {
4809 static const struct macb_config fu540_c000_config = {
4810 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO |
4811 MACB_CAPS_GEM_HAS_PTP,
4812 .dma_burst_length = 16,
4813 .clk_init = fu540_c000_clk_init,
4814 .init = fu540_c000_init,
4815 .jumbo_max_len = 10240,
4816 .usrio = &macb_default_usrio,
4819 static const struct macb_config at91sam9260_config = {
4820 .caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4821 .clk_init = macb_clk_init,
4823 .usrio = &macb_default_usrio,
4826 static const struct macb_config sama5d3macb_config = {
4827 .caps = MACB_CAPS_SG_DISABLED |
4828 MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4829 .clk_init = macb_clk_init,
4831 .usrio = &macb_default_usrio,
4834 static const struct macb_config pc302gem_config = {
4835 .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE,
4836 .dma_burst_length = 16,
4837 .clk_init = macb_clk_init,
4839 .usrio = &macb_default_usrio,
4842 static const struct macb_config sama5d2_config = {
4843 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4844 .dma_burst_length = 16,
4845 .clk_init = macb_clk_init,
4847 .usrio = &macb_default_usrio,
4850 static const struct macb_config sama5d29_config = {
4851 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_GEM_HAS_PTP,
4852 .dma_burst_length = 16,
4853 .clk_init = macb_clk_init,
4855 .usrio = &macb_default_usrio,
4858 static const struct macb_config sama5d3_config = {
4859 .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE |
4860 MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_JUMBO,
4861 .dma_burst_length = 16,
4862 .clk_init = macb_clk_init,
4864 .jumbo_max_len = 10240,
4865 .usrio = &macb_default_usrio,
4868 static const struct macb_config sama5d4_config = {
4869 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII,
4870 .dma_burst_length = 4,
4871 .clk_init = macb_clk_init,
4873 .usrio = &macb_default_usrio,
4876 static const struct macb_config emac_config = {
4877 .caps = MACB_CAPS_NEEDS_RSTONUBR | MACB_CAPS_MACB_IS_EMAC,
4878 .clk_init = at91ether_clk_init,
4879 .init = at91ether_init,
4880 .usrio = &macb_default_usrio,
4883 static const struct macb_config np4_config = {
4884 .caps = MACB_CAPS_USRIO_DISABLED,
4885 .clk_init = macb_clk_init,
4887 .usrio = &macb_default_usrio,
4890 static const struct macb_config zynqmp_config = {
4891 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
4893 MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH,
4894 .dma_burst_length = 16,
4895 .clk_init = macb_clk_init,
4896 .init = init_reset_optional,
4897 .jumbo_max_len = 10240,
4898 .usrio = &macb_default_usrio,
4901 static const struct macb_config zynq_config = {
4902 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_NO_GIGABIT_HALF |
4903 MACB_CAPS_NEEDS_RSTONUBR,
4904 .dma_burst_length = 16,
4905 .clk_init = macb_clk_init,
4907 .usrio = &macb_default_usrio,
4910 static const struct macb_config mpfs_config = {
4911 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
4913 MACB_CAPS_GEM_HAS_PTP,
4914 .dma_burst_length = 16,
4915 .clk_init = macb_clk_init,
4916 .init = init_reset_optional,
4917 .usrio = &macb_default_usrio,
4918 .max_tx_length = 4040, /* Cadence Erratum 1686 */
4919 .jumbo_max_len = 4040,
4922 static const struct macb_config sama7g5_gem_config = {
4923 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG |
4924 MACB_CAPS_MIIONRGMII | MACB_CAPS_GEM_HAS_PTP,
4925 .dma_burst_length = 16,
4926 .clk_init = macb_clk_init,
4928 .usrio = &sama7g5_usrio,
4931 static const struct macb_config sama7g5_emac_config = {
4932 .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII |
4933 MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_MIIONRGMII |
4934 MACB_CAPS_GEM_HAS_PTP,
4935 .dma_burst_length = 16,
4936 .clk_init = macb_clk_init,
4938 .usrio = &sama7g5_usrio,
4941 static const struct macb_config versal_config = {
4942 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO |
4943 MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH | MACB_CAPS_NEED_TSUCLK |
4944 MACB_CAPS_QUEUE_DISABLE,
4945 .dma_burst_length = 16,
4946 .clk_init = macb_clk_init,
4947 .init = init_reset_optional,
4948 .jumbo_max_len = 10240,
4949 .usrio = &macb_default_usrio,
4952 static const struct of_device_id macb_dt_ids[] = {
4953 { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config },
4954 { .compatible = "cdns,macb" },
4955 { .compatible = "cdns,np4-macb", .data = &np4_config },
4956 { .compatible = "cdns,pc302-gem", .data = &pc302gem_config },
4957 { .compatible = "cdns,gem", .data = &pc302gem_config },
4958 { .compatible = "cdns,sam9x60-macb", .data = &at91sam9260_config },
4959 { .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config },
4960 { .compatible = "atmel,sama5d29-gem", .data = &sama5d29_config },
4961 { .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config },
4962 { .compatible = "atmel,sama5d3-macb", .data = &sama5d3macb_config },
4963 { .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config },
4964 { .compatible = "cdns,at91rm9200-emac", .data = &emac_config },
4965 { .compatible = "cdns,emac", .data = &emac_config },
4966 { .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config}, /* deprecated */
4967 { .compatible = "cdns,zynq-gem", .data = &zynq_config }, /* deprecated */
4968 { .compatible = "sifive,fu540-c000-gem", .data = &fu540_c000_config },
4969 { .compatible = "microchip,mpfs-macb", .data = &mpfs_config },
4970 { .compatible = "microchip,sama7g5-gem", .data = &sama7g5_gem_config },
4971 { .compatible = "microchip,sama7g5-emac", .data = &sama7g5_emac_config },
4972 { .compatible = "xlnx,zynqmp-gem", .data = &zynqmp_config},
4973 { .compatible = "xlnx,zynq-gem", .data = &zynq_config },
4974 { .compatible = "xlnx,versal-gem", .data = &versal_config},
4977 MODULE_DEVICE_TABLE(of, macb_dt_ids);
4978 #endif /* CONFIG_OF */
4980 static const struct macb_config default_gem_config = {
4981 .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE |
4983 MACB_CAPS_GEM_HAS_PTP,
4984 .dma_burst_length = 16,
4985 .clk_init = macb_clk_init,
4987 .usrio = &macb_default_usrio,
4988 .jumbo_max_len = 10240,
4991 static int macb_probe(struct platform_device *pdev)
4993 const struct macb_config *macb_config = &default_gem_config;
4994 int (*clk_init)(struct platform_device *, struct clk **,
4995 struct clk **, struct clk **, struct clk **,
4996 struct clk **) = macb_config->clk_init;
4997 int (*init)(struct platform_device *) = macb_config->init;
4998 struct device_node *np = pdev->dev.of_node;
4999 struct clk *pclk, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL;
5000 struct clk *tsu_clk = NULL;
5001 unsigned int queue_mask, num_queues;
5003 phy_interface_t interface;
5004 struct net_device *dev;
5005 struct resource *regs;
5011 mem = devm_platform_get_and_ioremap_resource(pdev, 0, ®s);
5013 return PTR_ERR(mem);
5016 const struct of_device_id *match;
5018 match = of_match_node(macb_dt_ids, np);
5019 if (match && match->data) {
5020 macb_config = match->data;
5021 clk_init = macb_config->clk_init;
5022 init = macb_config->init;
5026 err = clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk, &tsu_clk);
5030 pm_runtime_set_autosuspend_delay(&pdev->dev, MACB_PM_TIMEOUT);
5031 pm_runtime_use_autosuspend(&pdev->dev);
5032 pm_runtime_get_noresume(&pdev->dev);
5033 pm_runtime_set_active(&pdev->dev);
5034 pm_runtime_enable(&pdev->dev);
5035 native_io = hw_is_native_io(mem);
5037 macb_probe_queues(mem, native_io, &queue_mask, &num_queues);
5038 dev = alloc_etherdev_mq(sizeof(*bp), num_queues);
5041 goto err_disable_clocks;
5044 dev->base_addr = regs->start;
5046 SET_NETDEV_DEV(dev, &pdev->dev);
5048 bp = netdev_priv(dev);
5052 bp->native_io = native_io;
5054 bp->macb_reg_readl = hw_readl_native;
5055 bp->macb_reg_writel = hw_writel_native;
5057 bp->macb_reg_readl = hw_readl;
5058 bp->macb_reg_writel = hw_writel;
5060 bp->num_queues = num_queues;
5061 bp->queue_mask = queue_mask;
5063 bp->dma_burst_length = macb_config->dma_burst_length;
5066 bp->tx_clk = tx_clk;
5067 bp->rx_clk = rx_clk;
5068 bp->tsu_clk = tsu_clk;
5070 bp->jumbo_max_len = macb_config->jumbo_max_len;
5072 if (!hw_is_gem(bp->regs, bp->native_io))
5073 bp->max_tx_length = MACB_MAX_TX_LEN;
5074 else if (macb_config->max_tx_length)
5075 bp->max_tx_length = macb_config->max_tx_length;
5077 bp->max_tx_length = GEM_MAX_TX_LEN;
5080 device_set_wakeup_capable(&pdev->dev, 1);
5082 bp->usrio = macb_config->usrio;
5084 /* By default we set to partial store and forward mode for zynqmp.
5085 * Disable if not set in devicetree.
5087 if (GEM_BFEXT(PBUF_CUTTHRU, gem_readl(bp, DCFG6))) {
5088 err = of_property_read_u32(bp->pdev->dev.of_node,
5089 "cdns,rx-watermark",
5093 /* Disable partial store and forward in case of error or
5094 * invalid watermark value
5096 wtrmrk_rst_val = (1 << (GEM_BFEXT(RX_PBUF_ADDR, gem_readl(bp, DCFG2)))) - 1;
5097 if (bp->rx_watermark > wtrmrk_rst_val || !bp->rx_watermark) {
5098 dev_info(&bp->pdev->dev, "Invalid watermark value\n");
5099 bp->rx_watermark = 0;
5103 spin_lock_init(&bp->lock);
5105 /* setup capabilities */
5106 macb_configure_caps(bp, macb_config);
5108 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
5109 if (GEM_BFEXT(DAW64, gem_readl(bp, DCFG6))) {
5110 dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(44));
5111 bp->hw_dma_cap |= HW_DMA_CAP_64B;
5114 platform_set_drvdata(pdev, dev);
5116 dev->irq = platform_get_irq(pdev, 0);
5119 goto err_out_free_netdev;
5122 /* MTU range: 68 - 1500 or 10240 */
5123 dev->min_mtu = GEM_MTU_MIN_SIZE;
5124 if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len)
5125 dev->max_mtu = bp->jumbo_max_len - ETH_HLEN - ETH_FCS_LEN;
5127 dev->max_mtu = ETH_DATA_LEN;
5129 if (bp->caps & MACB_CAPS_BD_RD_PREFETCH) {
5130 val = GEM_BFEXT(RXBD_RDBUFF, gem_readl(bp, DCFG10));
5132 bp->rx_bd_rd_prefetch = (2 << (val - 1)) *
5133 macb_dma_desc_get_size(bp);
5135 val = GEM_BFEXT(TXBD_RDBUFF, gem_readl(bp, DCFG10));
5137 bp->tx_bd_rd_prefetch = (2 << (val - 1)) *
5138 macb_dma_desc_get_size(bp);
5141 bp->rx_intr_mask = MACB_RX_INT_FLAGS;
5142 if (bp->caps & MACB_CAPS_NEEDS_RSTONUBR)
5143 bp->rx_intr_mask |= MACB_BIT(RXUBR);
5145 err = of_get_ethdev_address(np, bp->dev);
5146 if (err == -EPROBE_DEFER)
5147 goto err_out_free_netdev;
5149 macb_get_hwaddr(bp);
5151 err = of_get_phy_mode(np, &interface);
5153 /* not found in DT, MII by default */
5154 bp->phy_interface = PHY_INTERFACE_MODE_MII;
5156 bp->phy_interface = interface;
5158 /* IP specific init */
5161 goto err_out_free_netdev;
5163 err = macb_mii_init(bp);
5165 goto err_out_phy_exit;
5167 netif_carrier_off(dev);
5169 err = register_netdev(dev);
5171 dev_err(&pdev->dev, "Cannot register net device, aborting.\n");
5172 goto err_out_unregister_mdio;
5175 tasklet_setup(&bp->hresp_err_tasklet, macb_hresp_error_task);
5177 netdev_info(dev, "Cadence %s rev 0x%08x at 0x%08lx irq %d (%pM)\n",
5178 macb_is_gem(bp) ? "GEM" : "MACB", macb_readl(bp, MID),
5179 dev->base_addr, dev->irq, dev->dev_addr);
5181 pm_runtime_mark_last_busy(&bp->pdev->dev);
5182 pm_runtime_put_autosuspend(&bp->pdev->dev);
5186 err_out_unregister_mdio:
5187 mdiobus_unregister(bp->mii_bus);
5188 mdiobus_free(bp->mii_bus);
5191 phy_exit(bp->sgmii_phy);
5193 err_out_free_netdev:
5197 macb_clks_disable(pclk, hclk, tx_clk, rx_clk, tsu_clk);
5198 pm_runtime_disable(&pdev->dev);
5199 pm_runtime_set_suspended(&pdev->dev);
5200 pm_runtime_dont_use_autosuspend(&pdev->dev);
5205 static void macb_remove(struct platform_device *pdev)
5207 struct net_device *dev;
5210 dev = platform_get_drvdata(pdev);
5213 bp = netdev_priv(dev);
5214 phy_exit(bp->sgmii_phy);
5215 mdiobus_unregister(bp->mii_bus);
5216 mdiobus_free(bp->mii_bus);
5218 unregister_netdev(dev);
5219 tasklet_kill(&bp->hresp_err_tasklet);
5220 pm_runtime_disable(&pdev->dev);
5221 pm_runtime_dont_use_autosuspend(&pdev->dev);
5222 if (!pm_runtime_suspended(&pdev->dev)) {
5223 macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk,
5224 bp->rx_clk, bp->tsu_clk);
5225 pm_runtime_set_suspended(&pdev->dev);
5227 phylink_destroy(bp->phylink);
5232 static int __maybe_unused macb_suspend(struct device *dev)
5234 struct net_device *netdev = dev_get_drvdata(dev);
5235 struct macb *bp = netdev_priv(netdev);
5236 struct in_ifaddr *ifa = NULL;
5237 struct macb_queue *queue;
5238 struct in_device *idev;
5239 unsigned long flags;
5244 if (!device_may_wakeup(&bp->dev->dev))
5245 phy_exit(bp->sgmii_phy);
5247 if (!netif_running(netdev))
5250 if (bp->wol & MACB_WOL_ENABLED) {
5251 /* Check for IP address in WOL ARP mode */
5252 idev = __in_dev_get_rcu(bp->dev);
5254 ifa = rcu_dereference(idev->ifa_list);
5255 if ((bp->wolopts & WAKE_ARP) && !ifa) {
5256 netdev_err(netdev, "IP address not assigned as required by WoL walk ARP\n");
5259 spin_lock_irqsave(&bp->lock, flags);
5261 /* Disable Tx and Rx engines before disabling the queues,
5262 * this is mandatory as per the IP spec sheet
5264 tmp = macb_readl(bp, NCR);
5265 macb_writel(bp, NCR, tmp & ~(MACB_BIT(TE) | MACB_BIT(RE)));
5266 for (q = 0, queue = bp->queues; q < bp->num_queues;
5268 /* Disable RX queues */
5269 if (bp->caps & MACB_CAPS_QUEUE_DISABLE) {
5270 queue_writel(queue, RBQP, MACB_BIT(QUEUE_DISABLE));
5272 /* Tie off RX queues */
5273 queue_writel(queue, RBQP,
5274 lower_32_bits(bp->rx_ring_tieoff_dma));
5275 #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT
5276 queue_writel(queue, RBQPH,
5277 upper_32_bits(bp->rx_ring_tieoff_dma));
5280 /* Disable all interrupts */
5281 queue_writel(queue, IDR, -1);
5282 queue_readl(queue, ISR);
5283 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
5284 queue_writel(queue, ISR, -1);
5286 /* Enable Receive engine */
5287 macb_writel(bp, NCR, tmp | MACB_BIT(RE));
5288 /* Flush all status bits */
5289 macb_writel(bp, TSR, -1);
5290 macb_writel(bp, RSR, -1);
5292 tmp = (bp->wolopts & WAKE_MAGIC) ? MACB_BIT(MAG) : 0;
5293 if (bp->wolopts & WAKE_ARP) {
5294 tmp |= MACB_BIT(ARP);
5295 /* write IP address into register */
5296 tmp |= MACB_BFEXT(IP, be32_to_cpu(ifa->ifa_local));
5299 /* Change interrupt handler and
5300 * Enable WoL IRQ on queue 0
5302 devm_free_irq(dev, bp->queues[0].irq, bp->queues);
5303 if (macb_is_gem(bp)) {
5304 err = devm_request_irq(dev, bp->queues[0].irq, gem_wol_interrupt,
5305 IRQF_SHARED, netdev->name, bp->queues);
5308 "Unable to request IRQ %d (error %d)\n",
5309 bp->queues[0].irq, err);
5310 spin_unlock_irqrestore(&bp->lock, flags);
5313 queue_writel(bp->queues, IER, GEM_BIT(WOL));
5314 gem_writel(bp, WOL, tmp);
5316 err = devm_request_irq(dev, bp->queues[0].irq, macb_wol_interrupt,
5317 IRQF_SHARED, netdev->name, bp->queues);
5320 "Unable to request IRQ %d (error %d)\n",
5321 bp->queues[0].irq, err);
5322 spin_unlock_irqrestore(&bp->lock, flags);
5325 queue_writel(bp->queues, IER, MACB_BIT(WOL));
5326 macb_writel(bp, WOL, tmp);
5328 spin_unlock_irqrestore(&bp->lock, flags);
5330 enable_irq_wake(bp->queues[0].irq);
5333 netif_device_detach(netdev);
5334 for (q = 0, queue = bp->queues; q < bp->num_queues;
5336 napi_disable(&queue->napi_rx);
5337 napi_disable(&queue->napi_tx);
5340 if (!(bp->wol & MACB_WOL_ENABLED)) {
5342 phylink_stop(bp->phylink);
5344 spin_lock_irqsave(&bp->lock, flags);
5346 spin_unlock_irqrestore(&bp->lock, flags);
5349 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED))
5350 bp->pm_data.usrio = macb_or_gem_readl(bp, USRIO);
5352 if (netdev->hw_features & NETIF_F_NTUPLE)
5353 bp->pm_data.scrt2 = gem_readl_n(bp, ETHT, SCRT2_ETHT);
5356 bp->ptp_info->ptp_remove(netdev);
5357 if (!device_may_wakeup(dev))
5358 pm_runtime_force_suspend(dev);
5363 static int __maybe_unused macb_resume(struct device *dev)
5365 struct net_device *netdev = dev_get_drvdata(dev);
5366 struct macb *bp = netdev_priv(netdev);
5367 struct macb_queue *queue;
5368 unsigned long flags;
5372 if (!device_may_wakeup(&bp->dev->dev))
5373 phy_init(bp->sgmii_phy);
5375 if (!netif_running(netdev))
5378 if (!device_may_wakeup(dev))
5379 pm_runtime_force_resume(dev);
5381 if (bp->wol & MACB_WOL_ENABLED) {
5382 spin_lock_irqsave(&bp->lock, flags);
5384 if (macb_is_gem(bp)) {
5385 queue_writel(bp->queues, IDR, GEM_BIT(WOL));
5386 gem_writel(bp, WOL, 0);
5388 queue_writel(bp->queues, IDR, MACB_BIT(WOL));
5389 macb_writel(bp, WOL, 0);
5391 /* Clear ISR on queue 0 */
5392 queue_readl(bp->queues, ISR);
5393 if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE)
5394 queue_writel(bp->queues, ISR, -1);
5395 /* Replace interrupt handler on queue 0 */
5396 devm_free_irq(dev, bp->queues[0].irq, bp->queues);
5397 err = devm_request_irq(dev, bp->queues[0].irq, macb_interrupt,
5398 IRQF_SHARED, netdev->name, bp->queues);
5401 "Unable to request IRQ %d (error %d)\n",
5402 bp->queues[0].irq, err);
5403 spin_unlock_irqrestore(&bp->lock, flags);
5406 spin_unlock_irqrestore(&bp->lock, flags);
5408 disable_irq_wake(bp->queues[0].irq);
5410 /* Now make sure we disable phy before moving
5411 * to common restore path
5414 phylink_stop(bp->phylink);
5418 for (q = 0, queue = bp->queues; q < bp->num_queues;
5420 napi_enable(&queue->napi_rx);
5421 napi_enable(&queue->napi_tx);
5424 if (netdev->hw_features & NETIF_F_NTUPLE)
5425 gem_writel_n(bp, ETHT, SCRT2_ETHT, bp->pm_data.scrt2);
5427 if (!(bp->caps & MACB_CAPS_USRIO_DISABLED))
5428 macb_or_gem_writel(bp, USRIO, bp->pm_data.usrio);
5430 macb_writel(bp, NCR, MACB_BIT(MPE));
5432 macb_set_rx_mode(netdev);
5433 macb_restore_features(bp);
5436 phylink_start(bp->phylink);
5439 netif_device_attach(netdev);
5441 bp->ptp_info->ptp_init(netdev);
5446 static int __maybe_unused macb_runtime_suspend(struct device *dev)
5448 struct net_device *netdev = dev_get_drvdata(dev);
5449 struct macb *bp = netdev_priv(netdev);
5451 if (!(device_may_wakeup(dev)))
5452 macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk, bp->rx_clk, bp->tsu_clk);
5453 else if (!(bp->caps & MACB_CAPS_NEED_TSUCLK))
5454 macb_clks_disable(NULL, NULL, NULL, NULL, bp->tsu_clk);
5459 static int __maybe_unused macb_runtime_resume(struct device *dev)
5461 struct net_device *netdev = dev_get_drvdata(dev);
5462 struct macb *bp = netdev_priv(netdev);
5464 if (!(device_may_wakeup(dev))) {
5465 clk_prepare_enable(bp->pclk);
5466 clk_prepare_enable(bp->hclk);
5467 clk_prepare_enable(bp->tx_clk);
5468 clk_prepare_enable(bp->rx_clk);
5469 clk_prepare_enable(bp->tsu_clk);
5470 } else if (!(bp->caps & MACB_CAPS_NEED_TSUCLK)) {
5471 clk_prepare_enable(bp->tsu_clk);
5477 static const struct dev_pm_ops macb_pm_ops = {
5478 SET_SYSTEM_SLEEP_PM_OPS(macb_suspend, macb_resume)
5479 SET_RUNTIME_PM_OPS(macb_runtime_suspend, macb_runtime_resume, NULL)
5482 static struct platform_driver macb_driver = {
5483 .probe = macb_probe,
5484 .remove_new = macb_remove,
5487 .of_match_table = of_match_ptr(macb_dt_ids),
5492 module_platform_driver(macb_driver);
5494 MODULE_LICENSE("GPL");
5495 MODULE_DESCRIPTION("Cadence MACB/GEM Ethernet driver");
5496 MODULE_AUTHOR("Haavard Skinnemoen (Atmel)");
5497 MODULE_ALIAS("platform:macb");