| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Rafal Ozieblo | 4062 | 15.35% | 7 | 2.29% |
| Cyrille Pitchen | 3930 | 14.85% | 14 | 4.58% |
| Nicolas Ferre | 3246 | 12.27% | 24 | 7.84% |
| Håvard Skinnemoen | 2211 | 8.36% | 2 | 0.65% |
| Harini Katakam | 1639 | 6.19% | 19 | 6.21% |
| Claudiu Beznea | 1617 | 6.11% | 22 | 7.19% |
| Robert Hancock | 1105 | 4.18% | 6 | 1.96% |
| Antoine Tenart | 974 | 3.68% | 4 | 1.31% |
| Jamie Iles | 680 | 2.57% | 7 | 2.29% |
| Yash Shah | 572 | 2.16% | 2 | 0.65% |
| Parshuram Thombare | 537 | 2.03% | 3 | 0.98% |
| Zach Brown | 396 | 1.50% | 2 | 0.65% |
| Patrice Vilchez | 376 | 1.42% | 2 | 0.65% |
| Milind Parab | 344 | 1.30% | 2 | 0.65% |
| Andy Shevchenko | 327 | 1.24% | 4 | 1.31% |
| Russell King | 322 | 1.22% | 5 | 1.63% |
| Havard Skinnemoen | 305 | 1.15% | 4 | 1.31% |
| Sören Brinkmann | 295 | 1.11% | 10 | 3.27% |
| Xander Huff | 276 | 1.04% | 2 | 0.65% |
| frederic Rodo | 263 | 0.99% | 1 | 0.33% |
| Sergio Prado | 241 | 0.91% | 2 | 0.65% |
| Conor Dooley | 227 | 0.86% | 2 | 0.65% |
| Nathan Sullivan | 147 | 0.56% | 3 | 0.98% |
| Radhey Shyam Pandey | 135 | 0.51% | 2 | 0.65% |
| Andrei Pistirica | 133 | 0.50% | 1 | 0.33% |
| Alexandre Belloni | 119 | 0.45% | 4 | 1.31% |
| Shubhrajyoti Datta | 105 | 0.40% | 1 | 0.33% |
| Bartosz Folta | 101 | 0.38% | 1 | 0.33% |
| Joachim Eastwood | 96 | 0.36% | 5 | 1.63% |
| Willy Tarreau | 93 | 0.35% | 3 | 0.98% |
| Julia Cartwright | 74 | 0.28% | 2 | 0.65% |
| Anssi Hannula | 72 | 0.27% | 4 | 1.31% |
| Helmut Buchsbaum | 63 | 0.24% | 1 | 0.33% |
| Neil Armstrong | 60 | 0.23% | 2 | 0.65% |
| Thomas Petazzoni | 49 | 0.19% | 1 | 0.33% |
| Hari Prasath | 49 | 0.19% | 1 | 0.33% |
| Alexander Beregalov | 49 | 0.19% | 1 | 0.33% |
| Atish Patra | 46 | 0.17% | 1 | 0.33% |
| Lennert Buytenhek | 43 | 0.16% | 2 | 0.65% |
| Jean-Christophe Plagniol-Villard | 43 | 0.16% | 1 | 0.33% |
| Florian Fainelli | 42 | 0.16% | 2 | 0.65% |
| Gregory CLEMENT | 39 | 0.15% | 3 | 0.98% |
| Boris Brezillon | 38 | 0.14% | 3 | 0.98% |
| Michael Tretter | 36 | 0.14% | 2 | 0.65% |
| Alexey Khoroshilov | 35 | 0.13% | 1 | 0.33% |
| Sean Anderson | 35 | 0.13% | 1 | 0.33% |
| Tobias Klauser | 33 | 0.12% | 1 | 0.33% |
| Jarod Wilson | 33 | 0.12% | 1 | 0.33% |
| Corentin Labbe | 32 | 0.12% | 1 | 0.33% |
| Punnaiah Choudary Kalluri | 32 | 0.12% | 2 | 0.65% |
| Krzysztof Kozlowski | 29 | 0.11% | 1 | 0.33% |
| Stephen Hemminger | 27 | 0.10% | 2 | 0.65% |
| Moritz Fischer | 26 | 0.10% | 3 | 0.98% |
| Tomas Melin | 25 | 0.09% | 1 | 0.33% |
| Stefan Roese | 24 | 0.09% | 1 | 0.33% |
| Richard Röjfors | 24 | 0.09% | 1 | 0.33% |
| Alexander Stein | 23 | 0.09% | 1 | 0.33% |
| Arun Chandran | 21 | 0.08% | 2 | 0.65% |
| Jiri Pirko | 21 | 0.08% | 5 | 1.63% |
| Hao Chen | 20 | 0.08% | 1 | 0.33% |
| Steffen Trumtrar | 19 | 0.07% | 3 | 0.98% |
| Christoph Hellwig | 18 | 0.07% | 1 | 0.33% |
| Michael Walle | 17 | 0.06% | 2 | 0.65% |
| Sven Schnelle | 16 | 0.06% | 1 | 0.33% |
| Philippe Reynes | 16 | 0.06% | 1 | 0.33% |
| Codrin Ciubotariu | 15 | 0.06% | 1 | 0.33% |
| Brad Mouring | 15 | 0.06% | 2 | 0.65% |
| David S. Miller | 14 | 0.05% | 4 | 1.31% |
| Andrew Lunn | 14 | 0.05% | 3 | 0.98% |
| Yue haibing | 14 | 0.05% | 1 | 0.33% |
| Zong Li | 13 | 0.05% | 1 | 0.33% |
| Paul Thomas | 12 | 0.05% | 1 | 0.33% |
| Dejin Zheng | 11 | 0.04% | 1 | 0.33% |
| Michal Simek | 10 | 0.04% | 2 | 0.65% |
| Andrew Victor | 9 | 0.03% | 1 | 0.33% |
| Petr Štetiar | 9 | 0.03% | 1 | 0.33% |
| Michael Grzeschik | 8 | 0.03% | 1 | 0.33% |
| Oleksij Rempel | 8 | 0.03% | 1 | 0.33% |
| Peter Korsgaard | 8 | 0.03% | 1 | 0.33% |
| Chuhong Yuan | 8 | 0.03% | 1 | 0.33% |
| Sergiu Moga | 8 | 0.03% | 1 | 0.33% |
| Bo Shen | 8 | 0.03% | 1 | 0.33% |
| Arnd Bergmann | 8 | 0.03% | 2 | 0.65% |
| Arnaldo Carvalho de Melo | 8 | 0.03% | 3 | 0.98% |
| Wolfram Sang | 8 | 0.03% | 2 | 0.65% |
| vishnuvardhan | 7 | 0.03% | 1 | 0.33% |
| Chi Minghao | 7 | 0.03% | 1 | 0.33% |
| Andy Fleming | 7 | 0.03% | 1 | 0.33% |
| Kay Sievers | 7 | 0.03% | 1 | 0.33% |
| Zumeng Chen | 6 | 0.02% | 1 | 0.33% |
| Luca Ceresoli | 6 | 0.02% | 1 | 0.33% |
| Eric Dumazet | 6 | 0.02% | 3 | 0.98% |
| Mark Deneen | 6 | 0.02% | 1 | 0.33% |
| Joshua Hoke | 6 | 0.02% | 1 | 0.33% |
| Nicolae Rosia | 6 | 0.02% | 1 | 0.33% |
| Pradeep A. Dalvi | 5 | 0.02% | 1 | 0.33% |
| Stephen Boyd | 5 | 0.02% | 1 | 0.33% |
| Erik Waling | 5 | 0.02% | 1 | 0.33% |
| Atsushi Nemoto | 5 | 0.02% | 1 | 0.33% |
| Richard Cochran | 5 | 0.02% | 1 | 0.33% |
| Alexey Dobriyan | 4 | 0.02% | 2 | 0.65% |
| Wolfgang Steinwender | 4 | 0.02% | 1 | 0.33% |
| Ben Dooks | 4 | 0.02% | 1 | 0.33% |
| Sudip Mukherjee | 4 | 0.02% | 1 | 0.33% |
| Tord Andersson | 4 | 0.02% | 1 | 0.33% |
| Olof Johansson | 3 | 0.01% | 1 | 0.33% |
| Allen Pais | 3 | 0.01% | 1 | 0.33% |
| Charles Keepax | 3 | 0.01% | 1 | 0.33% |
| Yang Yingliang | 3 | 0.01% | 1 | 0.33% |
| Ahmad Fatoum | 3 | 0.01% | 1 | 0.33% |
| Jakub Kiciński | 2 | 0.01% | 2 | 0.65% |
| Thomas Gleixner | 2 | 0.01% | 1 | 0.33% |
| Guenter Roeck | 2 | 0.01% | 2 | 0.65% |
| Ben Hutchings | 2 | 0.01% | 1 | 0.33% |
| Jaeden Amero | 2 | 0.01% | 1 | 0.33% |
| Joe Perches | 1 | 0.00% | 1 | 0.33% |
| Patrick McHardy | 1 | 0.00% | 1 | 0.33% |
| Wei Yongjun | 1 | 0.00% | 1 | 0.33% |
| Lad Prabhakar | 1 | 0.00% | 1 | 0.33% |
| Jia-Ju Bai | 1 | 0.00% | 1 | 0.33% |
| Marc St-Amand | 1 | 0.00% | 1 | 0.33% |
| Danny Kukawka | 1 | 0.00% | 1 | 0.33% |
| Uwe Kleine-König | 1 | 0.00% | 1 | 0.33% |
| Wei Yang | 1 | 0.00% | 1 | 0.33% |
| Dan Carpenter | 1 | 0.00% | 1 | 0.33% |
| huang.zijiang | 1 | 0.00% | 1 | 0.33% |
| Ben Shelton | 1 | 0.00% | 1 | 0.33% |
| Jean Delvare | 1 | 0.00% | 1 | 0.33% |
| Johannes Berg | 1 | 0.00% | 1 | 0.33% |
| Eric W. Biedermann | 1 | 0.00% | 1 | 0.33% |
| Total | 26460 | 306 |
// SPDX-License-Identifier: GPL-2.0-only /* * Cadence MACB/GEM Ethernet Controller driver * * Copyright (C) 2004-2006 Atmel Corporation */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/clk.h> #include <linux/clk-provider.h> #include <linux/crc32.h> #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/types.h> #include <linux/circ_buf.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/io.h> #include <linux/gpio.h> #include <linux/gpio/consumer.h> #include <linux/interrupt.h> #include <linux/netdevice.h> #include <linux/etherdevice.h> #include <linux/dma-mapping.h> #include <linux/platform_device.h> #include <linux/phylink.h> #include <linux/of.h> #include <linux/of_device.h> #include <linux/of_gpio.h> #include <linux/of_mdio.h> #include <linux/of_net.h> #include <linux/ip.h> #include <linux/udp.h> #include <linux/tcp.h> #include <linux/iopoll.h> #include <linux/phy/phy.h> #include <linux/pm_runtime.h> #include <linux/ptp_classify.h> #include <linux/reset.h> #include <linux/firmware/xlnx-zynqmp.h> #include "macb.h" /* This structure is only used for MACB on SiFive FU540 devices */ struct sifive_fu540_macb_mgmt { void __iomem *reg; unsigned long rate; struct clk_hw hw; }; #define MACB_RX_BUFFER_SIZE 128 #define RX_BUFFER_MULTIPLE 64 /* bytes */ #define DEFAULT_RX_RING_SIZE 512 /* must be power of 2 */ #define MIN_RX_RING_SIZE 64 #define MAX_RX_RING_SIZE 8192 #define RX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \ * (bp)->rx_ring_size) #define DEFAULT_TX_RING_SIZE 512 /* must be power of 2 */ #define MIN_TX_RING_SIZE 64 #define MAX_TX_RING_SIZE 4096 #define TX_RING_BYTES(bp) (macb_dma_desc_get_size(bp) \ * (bp)->tx_ring_size) /* level of occupied TX descriptors under which we wake up TX process */ #define MACB_TX_WAKEUP_THRESH(bp) (3 * (bp)->tx_ring_size / 4) #define MACB_RX_INT_FLAGS (MACB_BIT(RCOMP) | MACB_BIT(ISR_ROVR)) #define MACB_TX_ERR_FLAGS (MACB_BIT(ISR_TUND) \ | MACB_BIT(ISR_RLE) \ | MACB_BIT(TXERR)) #define MACB_TX_INT_FLAGS (MACB_TX_ERR_FLAGS | MACB_BIT(TCOMP) \ | MACB_BIT(TXUBR)) /* Max length of transmit frame must be a multiple of 8 bytes */ #define MACB_TX_LEN_ALIGN 8 #define MACB_MAX_TX_LEN ((unsigned int)((1 << MACB_TX_FRMLEN_SIZE) - 1) & ~((unsigned int)(MACB_TX_LEN_ALIGN - 1))) /* Limit maximum TX length as per Cadence TSO errata. This is to avoid a * false amba_error in TX path from the DMA assuming there is not enough * space in the SRAM (16KB) even when there is. */ #define GEM_MAX_TX_LEN (unsigned int)(0x3FC0) #define GEM_MTU_MIN_SIZE ETH_MIN_MTU #define MACB_NETIF_LSO NETIF_F_TSO #define MACB_WOL_HAS_MAGIC_PACKET (0x1 << 0) #define MACB_WOL_ENABLED (0x1 << 1) #define HS_SPEED_10000M 4 #define MACB_SERDES_RATE_10G 1 /* Graceful stop timeouts in us. We should allow up to * 1 frame time (10 Mbits/s, full-duplex, ignoring collisions) */ #define MACB_HALT_TIMEOUT 1230 #define MACB_PM_TIMEOUT 100 /* ms */ #define MACB_MDIO_TIMEOUT 1000000 /* in usecs */ /* DMA buffer descriptor might be different size * depends on hardware configuration: * * 1. dma address width 32 bits: * word 1: 32 bit address of Data Buffer * word 2: control * * 2. dma address width 64 bits: * word 1: 32 bit address of Data Buffer * word 2: control * word 3: upper 32 bit address of Data Buffer * word 4: unused * * 3. dma address width 32 bits with hardware timestamping: * word 1: 32 bit address of Data Buffer * word 2: control * word 3: timestamp word 1 * word 4: timestamp word 2 * * 4. dma address width 64 bits with hardware timestamping: * word 1: 32 bit address of Data Buffer * word 2: control * word 3: upper 32 bit address of Data Buffer * word 4: unused * word 5: timestamp word 1 * word 6: timestamp word 2 */ static unsigned int macb_dma_desc_get_size(struct macb *bp) { #ifdef MACB_EXT_DESC unsigned int desc_size; switch (bp->hw_dma_cap) { case HW_DMA_CAP_64B: desc_size = sizeof(struct macb_dma_desc) + sizeof(struct macb_dma_desc_64); break; case HW_DMA_CAP_PTP: desc_size = sizeof(struct macb_dma_desc) + sizeof(struct macb_dma_desc_ptp); break; case HW_DMA_CAP_64B_PTP: desc_size = sizeof(struct macb_dma_desc) + sizeof(struct macb_dma_desc_64) + sizeof(struct macb_dma_desc_ptp); break; default: desc_size = sizeof(struct macb_dma_desc); } return desc_size; #endif return sizeof(struct macb_dma_desc); } static unsigned int macb_adj_dma_desc_idx(struct macb *bp, unsigned int desc_idx) { #ifdef MACB_EXT_DESC switch (bp->hw_dma_cap) { case HW_DMA_CAP_64B: case HW_DMA_CAP_PTP: desc_idx <<= 1; break; case HW_DMA_CAP_64B_PTP: desc_idx *= 3; break; default: break; } #endif return desc_idx; } #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT static struct macb_dma_desc_64 *macb_64b_desc(struct macb *bp, struct macb_dma_desc *desc) { return (struct macb_dma_desc_64 *)((void *)desc + sizeof(struct macb_dma_desc)); } #endif /* Ring buffer accessors */ static unsigned int macb_tx_ring_wrap(struct macb *bp, unsigned int index) { return index & (bp->tx_ring_size - 1); } static struct macb_dma_desc *macb_tx_desc(struct macb_queue *queue, unsigned int index) { index = macb_tx_ring_wrap(queue->bp, index); index = macb_adj_dma_desc_idx(queue->bp, index); return &queue->tx_ring[index]; } static struct macb_tx_skb *macb_tx_skb(struct macb_queue *queue, unsigned int index) { return &queue->tx_skb[macb_tx_ring_wrap(queue->bp, index)]; } static dma_addr_t macb_tx_dma(struct macb_queue *queue, unsigned int index) { dma_addr_t offset; offset = macb_tx_ring_wrap(queue->bp, index) * macb_dma_desc_get_size(queue->bp); return queue->tx_ring_dma + offset; } static unsigned int macb_rx_ring_wrap(struct macb *bp, unsigned int index) { return index & (bp->rx_ring_size - 1); } static struct macb_dma_desc *macb_rx_desc(struct macb_queue *queue, unsigned int index) { index = macb_rx_ring_wrap(queue->bp, index); index = macb_adj_dma_desc_idx(queue->bp, index); return &queue->rx_ring[index]; } static void *macb_rx_buffer(struct macb_queue *queue, unsigned int index) { return queue->rx_buffers + queue->bp->rx_buffer_size * macb_rx_ring_wrap(queue->bp, index); } /* I/O accessors */ static u32 hw_readl_native(struct macb *bp, int offset) { return __raw_readl(bp->regs + offset); } static void hw_writel_native(struct macb *bp, int offset, u32 value) { __raw_writel(value, bp->regs + offset); } static u32 hw_readl(struct macb *bp, int offset) { return readl_relaxed(bp->regs + offset); } static void hw_writel(struct macb *bp, int offset, u32 value) { writel_relaxed(value, bp->regs + offset); } /* Find the CPU endianness by using the loopback bit of NCR register. When the * CPU is in big endian we need to program swapped mode for management * descriptor access. */ static bool hw_is_native_io(void __iomem *addr) { u32 value = MACB_BIT(LLB); __raw_writel(value, addr + MACB_NCR); value = __raw_readl(addr + MACB_NCR); /* Write 0 back to disable everything */ __raw_writel(0, addr + MACB_NCR); return value == MACB_BIT(LLB); } static bool hw_is_gem(void __iomem *addr, bool native_io) { u32 id; if (native_io) id = __raw_readl(addr + MACB_MID); else id = readl_relaxed(addr + MACB_MID); return MACB_BFEXT(IDNUM, id) >= 0x2; } static void macb_set_hwaddr(struct macb *bp) { u32 bottom; u16 top; bottom = cpu_to_le32(*((u32 *)bp->dev->dev_addr)); macb_or_gem_writel(bp, SA1B, bottom); top = cpu_to_le16(*((u16 *)(bp->dev->dev_addr + 4))); macb_or_gem_writel(bp, SA1T, top); /* Clear unused address register sets */ macb_or_gem_writel(bp, SA2B, 0); macb_or_gem_writel(bp, SA2T, 0); macb_or_gem_writel(bp, SA3B, 0); macb_or_gem_writel(bp, SA3T, 0); macb_or_gem_writel(bp, SA4B, 0); macb_or_gem_writel(bp, SA4T, 0); } static void macb_get_hwaddr(struct macb *bp) { u32 bottom; u16 top; u8 addr[6]; int i; /* Check all 4 address register for valid address */ for (i = 0; i < 4; i++) { bottom = macb_or_gem_readl(bp, SA1B + i * 8); top = macb_or_gem_readl(bp, SA1T + i * 8); addr[0] = bottom & 0xff; addr[1] = (bottom >> 8) & 0xff; addr[2] = (bottom >> 16) & 0xff; addr[3] = (bottom >> 24) & 0xff; addr[4] = top & 0xff; addr[5] = (top >> 8) & 0xff; if (is_valid_ether_addr(addr)) { eth_hw_addr_set(bp->dev, addr); return; } } dev_info(&bp->pdev->dev, "invalid hw address, using random\n"); eth_hw_addr_random(bp->dev); } static int macb_mdio_wait_for_idle(struct macb *bp) { u32 val; return readx_poll_timeout(MACB_READ_NSR, bp, val, val & MACB_BIT(IDLE), 1, MACB_MDIO_TIMEOUT); } static int macb_mdio_read(struct mii_bus *bus, int mii_id, int regnum) { struct macb *bp = bus->priv; int status; status = pm_runtime_resume_and_get(&bp->pdev->dev); if (status < 0) goto mdio_pm_exit; status = macb_mdio_wait_for_idle(bp); if (status < 0) goto mdio_read_exit; if (regnum & MII_ADDR_C45) { macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) | MACB_BF(RW, MACB_MAN_C45_ADDR) | MACB_BF(PHYA, mii_id) | MACB_BF(REGA, (regnum >> 16) & 0x1F) | MACB_BF(DATA, regnum & 0xFFFF) | MACB_BF(CODE, MACB_MAN_C45_CODE))); status = macb_mdio_wait_for_idle(bp); if (status < 0) goto mdio_read_exit; macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) | MACB_BF(RW, MACB_MAN_C45_READ) | MACB_BF(PHYA, mii_id) | MACB_BF(REGA, (regnum >> 16) & 0x1F) | MACB_BF(CODE, MACB_MAN_C45_CODE))); } else { macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF) | MACB_BF(RW, MACB_MAN_C22_READ) | MACB_BF(PHYA, mii_id) | MACB_BF(REGA, regnum) | MACB_BF(CODE, MACB_MAN_C22_CODE))); } status = macb_mdio_wait_for_idle(bp); if (status < 0) goto mdio_read_exit; status = MACB_BFEXT(DATA, macb_readl(bp, MAN)); mdio_read_exit: pm_runtime_mark_last_busy(&bp->pdev->dev); pm_runtime_put_autosuspend(&bp->pdev->dev); mdio_pm_exit: return status; } static int macb_mdio_write(struct mii_bus *bus, int mii_id, int regnum, u16 value) { struct macb *bp = bus->priv; int status; status = pm_runtime_resume_and_get(&bp->pdev->dev); if (status < 0) goto mdio_pm_exit; status = macb_mdio_wait_for_idle(bp); if (status < 0) goto mdio_write_exit; if (regnum & MII_ADDR_C45) { macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) | MACB_BF(RW, MACB_MAN_C45_ADDR) | MACB_BF(PHYA, mii_id) | MACB_BF(REGA, (regnum >> 16) & 0x1F) | MACB_BF(DATA, regnum & 0xFFFF) | MACB_BF(CODE, MACB_MAN_C45_CODE))); status = macb_mdio_wait_for_idle(bp); if (status < 0) goto mdio_write_exit; macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C45_SOF) | MACB_BF(RW, MACB_MAN_C45_WRITE) | MACB_BF(PHYA, mii_id) | MACB_BF(REGA, (regnum >> 16) & 0x1F) | MACB_BF(CODE, MACB_MAN_C45_CODE) | MACB_BF(DATA, value))); } else { macb_writel(bp, MAN, (MACB_BF(SOF, MACB_MAN_C22_SOF) | MACB_BF(RW, MACB_MAN_C22_WRITE) | MACB_BF(PHYA, mii_id) | MACB_BF(REGA, regnum) | MACB_BF(CODE, MACB_MAN_C22_CODE) | MACB_BF(DATA, value))); } status = macb_mdio_wait_for_idle(bp); if (status < 0) goto mdio_write_exit; mdio_write_exit: pm_runtime_mark_last_busy(&bp->pdev->dev); pm_runtime_put_autosuspend(&bp->pdev->dev); mdio_pm_exit: return status; } static void macb_init_buffers(struct macb *bp) { struct macb_queue *queue; unsigned int q; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { queue_writel(queue, RBQP, lower_32_bits(queue->rx_ring_dma)); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (bp->hw_dma_cap & HW_DMA_CAP_64B) queue_writel(queue, RBQPH, upper_32_bits(queue->rx_ring_dma)); #endif queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma)); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (bp->hw_dma_cap & HW_DMA_CAP_64B) queue_writel(queue, TBQPH, upper_32_bits(queue->tx_ring_dma)); #endif } } /** * macb_set_tx_clk() - Set a clock to a new frequency * @bp: pointer to struct macb * @speed: New frequency in Hz */ static void macb_set_tx_clk(struct macb *bp, int speed) { long ferr, rate, rate_rounded; if (!bp->tx_clk || (bp->caps & MACB_CAPS_CLK_HW_CHG)) return; /* In case of MII the PHY is the clock master */ if (bp->phy_interface == PHY_INTERFACE_MODE_MII) return; switch (speed) { case SPEED_10: rate = 2500000; break; case SPEED_100: rate = 25000000; break; case SPEED_1000: rate = 125000000; break; default: return; } rate_rounded = clk_round_rate(bp->tx_clk, rate); if (rate_rounded < 0) return; /* RGMII allows 50 ppm frequency error. Test and warn if this limit * is not satisfied. */ ferr = abs(rate_rounded - rate); ferr = DIV_ROUND_UP(ferr, rate / 100000); if (ferr > 5) netdev_warn(bp->dev, "unable to generate target frequency: %ld Hz\n", rate); if (clk_set_rate(bp->tx_clk, rate_rounded)) netdev_err(bp->dev, "adjusting tx_clk failed.\n"); } static void macb_usx_pcs_link_up(struct phylink_pcs *pcs, unsigned int mode, phy_interface_t interface, int speed, int duplex) { struct macb *bp = container_of(pcs, struct macb, phylink_usx_pcs); u32 config; config = gem_readl(bp, USX_CONTROL); config = GEM_BFINS(SERDES_RATE, MACB_SERDES_RATE_10G, config); config = GEM_BFINS(USX_CTRL_SPEED, HS_SPEED_10000M, config); config &= ~(GEM_BIT(TX_SCR_BYPASS) | GEM_BIT(RX_SCR_BYPASS)); config |= GEM_BIT(TX_EN); gem_writel(bp, USX_CONTROL, config); } static void macb_usx_pcs_get_state(struct phylink_pcs *pcs, struct phylink_link_state *state) { struct macb *bp = container_of(pcs, struct macb, phylink_usx_pcs); u32 val; state->speed = SPEED_10000; state->duplex = 1; state->an_complete = 1; val = gem_readl(bp, USX_STATUS); state->link = !!(val & GEM_BIT(USX_BLOCK_LOCK)); val = gem_readl(bp, NCFGR); if (val & GEM_BIT(PAE)) state->pause = MLO_PAUSE_RX; } static int macb_usx_pcs_config(struct phylink_pcs *pcs, unsigned int mode, phy_interface_t interface, const unsigned long *advertising, bool permit_pause_to_mac) { struct macb *bp = container_of(pcs, struct macb, phylink_usx_pcs); gem_writel(bp, USX_CONTROL, gem_readl(bp, USX_CONTROL) | GEM_BIT(SIGNAL_OK)); return 0; } static void macb_pcs_get_state(struct phylink_pcs *pcs, struct phylink_link_state *state) { state->link = 0; } static void macb_pcs_an_restart(struct phylink_pcs *pcs) { /* Not supported */ } static int macb_pcs_config(struct phylink_pcs *pcs, unsigned int mode, phy_interface_t interface, const unsigned long *advertising, bool permit_pause_to_mac) { return 0; } static const struct phylink_pcs_ops macb_phylink_usx_pcs_ops = { .pcs_get_state = macb_usx_pcs_get_state, .pcs_config = macb_usx_pcs_config, .pcs_link_up = macb_usx_pcs_link_up, }; static const struct phylink_pcs_ops macb_phylink_pcs_ops = { .pcs_get_state = macb_pcs_get_state, .pcs_an_restart = macb_pcs_an_restart, .pcs_config = macb_pcs_config, }; static void macb_mac_config(struct phylink_config *config, unsigned int mode, const struct phylink_link_state *state) { struct net_device *ndev = to_net_dev(config->dev); struct macb *bp = netdev_priv(ndev); unsigned long flags; u32 old_ctrl, ctrl; u32 old_ncr, ncr; spin_lock_irqsave(&bp->lock, flags); old_ctrl = ctrl = macb_or_gem_readl(bp, NCFGR); old_ncr = ncr = macb_or_gem_readl(bp, NCR); if (bp->caps & MACB_CAPS_MACB_IS_EMAC) { if (state->interface == PHY_INTERFACE_MODE_RMII) ctrl |= MACB_BIT(RM9200_RMII); } else if (macb_is_gem(bp)) { ctrl &= ~(GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL)); ncr &= ~GEM_BIT(ENABLE_HS_MAC); if (state->interface == PHY_INTERFACE_MODE_SGMII) { ctrl |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL); } else if (state->interface == PHY_INTERFACE_MODE_10GBASER) { ctrl |= GEM_BIT(PCSSEL); ncr |= GEM_BIT(ENABLE_HS_MAC); } else if (bp->caps & MACB_CAPS_MIIONRGMII && bp->phy_interface == PHY_INTERFACE_MODE_MII) { ncr |= MACB_BIT(MIIONRGMII); } } /* Apply the new configuration, if any */ if (old_ctrl ^ ctrl) macb_or_gem_writel(bp, NCFGR, ctrl); if (old_ncr ^ ncr) macb_or_gem_writel(bp, NCR, ncr); /* Disable AN for SGMII fixed link configuration, enable otherwise. * Must be written after PCSSEL is set in NCFGR, * otherwise writes will not take effect. */ if (macb_is_gem(bp) && state->interface == PHY_INTERFACE_MODE_SGMII) { u32 pcsctrl, old_pcsctrl; old_pcsctrl = gem_readl(bp, PCSCNTRL); if (mode == MLO_AN_FIXED) pcsctrl = old_pcsctrl & ~GEM_BIT(PCSAUTONEG); else pcsctrl = old_pcsctrl | GEM_BIT(PCSAUTONEG); if (old_pcsctrl != pcsctrl) gem_writel(bp, PCSCNTRL, pcsctrl); } spin_unlock_irqrestore(&bp->lock, flags); } static void macb_mac_link_down(struct phylink_config *config, unsigned int mode, phy_interface_t interface) { struct net_device *ndev = to_net_dev(config->dev); struct macb *bp = netdev_priv(ndev); struct macb_queue *queue; unsigned int q; u32 ctrl; if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC)) for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) queue_writel(queue, IDR, bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP)); /* Disable Rx and Tx */ ctrl = macb_readl(bp, NCR) & ~(MACB_BIT(RE) | MACB_BIT(TE)); macb_writel(bp, NCR, ctrl); netif_tx_stop_all_queues(ndev); } static void macb_mac_link_up(struct phylink_config *config, struct phy_device *phy, unsigned int mode, phy_interface_t interface, int speed, int duplex, bool tx_pause, bool rx_pause) { struct net_device *ndev = to_net_dev(config->dev); struct macb *bp = netdev_priv(ndev); struct macb_queue *queue; unsigned long flags; unsigned int q; u32 ctrl; spin_lock_irqsave(&bp->lock, flags); ctrl = macb_or_gem_readl(bp, NCFGR); ctrl &= ~(MACB_BIT(SPD) | MACB_BIT(FD)); if (speed == SPEED_100) ctrl |= MACB_BIT(SPD); if (duplex) ctrl |= MACB_BIT(FD); if (!(bp->caps & MACB_CAPS_MACB_IS_EMAC)) { ctrl &= ~MACB_BIT(PAE); if (macb_is_gem(bp)) { ctrl &= ~GEM_BIT(GBE); if (speed == SPEED_1000) ctrl |= GEM_BIT(GBE); } if (rx_pause) ctrl |= MACB_BIT(PAE); macb_set_tx_clk(bp, speed); /* Initialize rings & buffers as clearing MACB_BIT(TE) in link down * cleared the pipeline and control registers. */ bp->macbgem_ops.mog_init_rings(bp); macb_init_buffers(bp); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) queue_writel(queue, IER, bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP)); } macb_or_gem_writel(bp, NCFGR, ctrl); if (bp->phy_interface == PHY_INTERFACE_MODE_10GBASER) gem_writel(bp, HS_MAC_CONFIG, GEM_BFINS(HS_MAC_SPEED, HS_SPEED_10000M, gem_readl(bp, HS_MAC_CONFIG))); spin_unlock_irqrestore(&bp->lock, flags); /* Enable Rx and Tx */ macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(RE) | MACB_BIT(TE)); netif_tx_wake_all_queues(ndev); } static struct phylink_pcs *macb_mac_select_pcs(struct phylink_config *config, phy_interface_t interface) { struct net_device *ndev = to_net_dev(config->dev); struct macb *bp = netdev_priv(ndev); if (interface == PHY_INTERFACE_MODE_10GBASER) return &bp->phylink_usx_pcs; else if (interface == PHY_INTERFACE_MODE_SGMII) return &bp->phylink_sgmii_pcs; else return NULL; } static const struct phylink_mac_ops macb_phylink_ops = { .validate = phylink_generic_validate, .mac_select_pcs = macb_mac_select_pcs, .mac_config = macb_mac_config, .mac_link_down = macb_mac_link_down, .mac_link_up = macb_mac_link_up, }; static bool macb_phy_handle_exists(struct device_node *dn) { dn = of_parse_phandle(dn, "phy-handle", 0); of_node_put(dn); return dn != NULL; } static int macb_phylink_connect(struct macb *bp) { struct device_node *dn = bp->pdev->dev.of_node; struct net_device *dev = bp->dev; struct phy_device *phydev; int ret; if (dn) ret = phylink_of_phy_connect(bp->phylink, dn, 0); if (!dn || (ret && !macb_phy_handle_exists(dn))) { phydev = phy_find_first(bp->mii_bus); if (!phydev) { netdev_err(dev, "no PHY found\n"); return -ENXIO; } /* attach the mac to the phy */ ret = phylink_connect_phy(bp->phylink, phydev); } if (ret) { netdev_err(dev, "Could not attach PHY (%d)\n", ret); return ret; } phylink_start(bp->phylink); return 0; } static void macb_get_pcs_fixed_state(struct phylink_config *config, struct phylink_link_state *state) { struct net_device *ndev = to_net_dev(config->dev); struct macb *bp = netdev_priv(ndev); state->link = (macb_readl(bp, NSR) & MACB_BIT(NSR_LINK)) != 0; } /* based on au1000_eth. c*/ static int macb_mii_probe(struct net_device *dev) { struct macb *bp = netdev_priv(dev); bp->phylink_sgmii_pcs.ops = &macb_phylink_pcs_ops; bp->phylink_usx_pcs.ops = &macb_phylink_usx_pcs_ops; bp->phylink_config.dev = &dev->dev; bp->phylink_config.type = PHYLINK_NETDEV; bp->phylink_config.mac_managed_pm = true; if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) { bp->phylink_config.poll_fixed_state = true; bp->phylink_config.get_fixed_state = macb_get_pcs_fixed_state; } bp->phylink_config.mac_capabilities = MAC_ASYM_PAUSE | MAC_10 | MAC_100; __set_bit(PHY_INTERFACE_MODE_MII, bp->phylink_config.supported_interfaces); __set_bit(PHY_INTERFACE_MODE_RMII, bp->phylink_config.supported_interfaces); /* Determine what modes are supported */ if (macb_is_gem(bp) && (bp->caps & MACB_CAPS_GIGABIT_MODE_AVAILABLE)) { bp->phylink_config.mac_capabilities |= MAC_1000FD; if (!(bp->caps & MACB_CAPS_NO_GIGABIT_HALF)) bp->phylink_config.mac_capabilities |= MAC_1000HD; __set_bit(PHY_INTERFACE_MODE_GMII, bp->phylink_config.supported_interfaces); phy_interface_set_rgmii(bp->phylink_config.supported_interfaces); if (bp->caps & MACB_CAPS_PCS) __set_bit(PHY_INTERFACE_MODE_SGMII, bp->phylink_config.supported_interfaces); if (bp->caps & MACB_CAPS_HIGH_SPEED) { __set_bit(PHY_INTERFACE_MODE_10GBASER, bp->phylink_config.supported_interfaces); bp->phylink_config.mac_capabilities |= MAC_10000FD; } } bp->phylink = phylink_create(&bp->phylink_config, bp->pdev->dev.fwnode, bp->phy_interface, &macb_phylink_ops); if (IS_ERR(bp->phylink)) { netdev_err(dev, "Could not create a phylink instance (%ld)\n", PTR_ERR(bp->phylink)); return PTR_ERR(bp->phylink); } return 0; } static int macb_mdiobus_register(struct macb *bp) { struct device_node *child, *np = bp->pdev->dev.of_node; /* If we have a child named mdio, probe it instead of looking for PHYs * directly under the MAC node */ child = of_get_child_by_name(np, "mdio"); if (child) { int ret = of_mdiobus_register(bp->mii_bus, child); of_node_put(child); return ret; } if (of_phy_is_fixed_link(np)) return mdiobus_register(bp->mii_bus); /* Only create the PHY from the device tree if at least one PHY is * described. Otherwise scan the entire MDIO bus. We do this to support * old device tree that did not follow the best practices and did not * describe their network PHYs. */ for_each_available_child_of_node(np, child) if (of_mdiobus_child_is_phy(child)) { /* The loop increments the child refcount, * decrement it before returning. */ of_node_put(child); return of_mdiobus_register(bp->mii_bus, np); } return mdiobus_register(bp->mii_bus); } static int macb_mii_init(struct macb *bp) { int err = -ENXIO; /* Enable management port */ macb_writel(bp, NCR, MACB_BIT(MPE)); bp->mii_bus = mdiobus_alloc(); if (!bp->mii_bus) { err = -ENOMEM; goto err_out; } bp->mii_bus->name = "MACB_mii_bus"; bp->mii_bus->read = &macb_mdio_read; bp->mii_bus->write = &macb_mdio_write; snprintf(bp->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", bp->pdev->name, bp->pdev->id); bp->mii_bus->priv = bp; bp->mii_bus->parent = &bp->pdev->dev; dev_set_drvdata(&bp->dev->dev, bp->mii_bus); err = macb_mdiobus_register(bp); if (err) goto err_out_free_mdiobus; err = macb_mii_probe(bp->dev); if (err) goto err_out_unregister_bus; return 0; err_out_unregister_bus: mdiobus_unregister(bp->mii_bus); err_out_free_mdiobus: mdiobus_free(bp->mii_bus); err_out: return err; } static void macb_update_stats(struct macb *bp) { u32 *p = &bp->hw_stats.macb.rx_pause_frames; u32 *end = &bp->hw_stats.macb.tx_pause_frames + 1; int offset = MACB_PFR; WARN_ON((unsigned long)(end - p - 1) != (MACB_TPF - MACB_PFR) / 4); for (; p < end; p++, offset += 4) *p += bp->macb_reg_readl(bp, offset); } static int macb_halt_tx(struct macb *bp) { unsigned long halt_time, timeout; u32 status; macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(THALT)); timeout = jiffies + usecs_to_jiffies(MACB_HALT_TIMEOUT); do { halt_time = jiffies; status = macb_readl(bp, TSR); if (!(status & MACB_BIT(TGO))) return 0; udelay(250); } while (time_before(halt_time, timeout)); return -ETIMEDOUT; } static void macb_tx_unmap(struct macb *bp, struct macb_tx_skb *tx_skb, int budget) { if (tx_skb->mapping) { if (tx_skb->mapped_as_page) dma_unmap_page(&bp->pdev->dev, tx_skb->mapping, tx_skb->size, DMA_TO_DEVICE); else dma_unmap_single(&bp->pdev->dev, tx_skb->mapping, tx_skb->size, DMA_TO_DEVICE); tx_skb->mapping = 0; } if (tx_skb->skb) { napi_consume_skb(tx_skb->skb, budget); tx_skb->skb = NULL; } } static void macb_set_addr(struct macb *bp, struct macb_dma_desc *desc, dma_addr_t addr) { #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT struct macb_dma_desc_64 *desc_64; if (bp->hw_dma_cap & HW_DMA_CAP_64B) { desc_64 = macb_64b_desc(bp, desc); desc_64->addrh = upper_32_bits(addr); /* The low bits of RX address contain the RX_USED bit, clearing * of which allows packet RX. Make sure the high bits are also * visible to HW at that point. */ dma_wmb(); } #endif desc->addr = lower_32_bits(addr); } static dma_addr_t macb_get_addr(struct macb *bp, struct macb_dma_desc *desc) { dma_addr_t addr = 0; #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT struct macb_dma_desc_64 *desc_64; if (bp->hw_dma_cap & HW_DMA_CAP_64B) { desc_64 = macb_64b_desc(bp, desc); addr = ((u64)(desc_64->addrh) << 32); } #endif addr |= MACB_BF(RX_WADDR, MACB_BFEXT(RX_WADDR, desc->addr)); return addr; } static void macb_tx_error_task(struct work_struct *work) { struct macb_queue *queue = container_of(work, struct macb_queue, tx_error_task); struct macb *bp = queue->bp; struct macb_tx_skb *tx_skb; struct macb_dma_desc *desc; struct sk_buff *skb; unsigned int tail; unsigned long flags; netdev_vdbg(bp->dev, "macb_tx_error_task: q = %u, t = %u, h = %u\n", (unsigned int)(queue - bp->queues), queue->tx_tail, queue->tx_head); /* Prevent the queue NAPI TX poll from running, as it calls * macb_tx_complete(), which in turn may call netif_wake_subqueue(). * As explained below, we have to halt the transmission before updating * TBQP registers so we call netif_tx_stop_all_queues() to notify the * network engine about the macb/gem being halted. */ napi_disable(&queue->napi_tx); spin_lock_irqsave(&bp->lock, flags); /* Make sure nobody is trying to queue up new packets */ netif_tx_stop_all_queues(bp->dev); /* Stop transmission now * (in case we have just queued new packets) * macb/gem must be halted to write TBQP register */ if (macb_halt_tx(bp)) /* Just complain for now, reinitializing TX path can be good */ netdev_err(bp->dev, "BUG: halt tx timed out\n"); /* Treat frames in TX queue including the ones that caused the error. * Free transmit buffers in upper layer. */ for (tail = queue->tx_tail; tail != queue->tx_head; tail++) { u32 ctrl; desc = macb_tx_desc(queue, tail); ctrl = desc->ctrl; tx_skb = macb_tx_skb(queue, tail); skb = tx_skb->skb; if (ctrl & MACB_BIT(TX_USED)) { /* skb is set for the last buffer of the frame */ while (!skb) { macb_tx_unmap(bp, tx_skb, 0); tail++; tx_skb = macb_tx_skb(queue, tail); skb = tx_skb->skb; } /* ctrl still refers to the first buffer descriptor * since it's the only one written back by the hardware */ if (!(ctrl & MACB_BIT(TX_BUF_EXHAUSTED))) { netdev_vdbg(bp->dev, "txerr skb %u (data %p) TX complete\n", macb_tx_ring_wrap(bp, tail), skb->data); bp->dev->stats.tx_packets++; queue->stats.tx_packets++; bp->dev->stats.tx_bytes += skb->len; queue->stats.tx_bytes += skb->len; } } else { /* "Buffers exhausted mid-frame" errors may only happen * if the driver is buggy, so complain loudly about * those. Statistics are updated by hardware. */ if (ctrl & MACB_BIT(TX_BUF_EXHAUSTED)) netdev_err(bp->dev, "BUG: TX buffers exhausted mid-frame\n"); desc->ctrl = ctrl | MACB_BIT(TX_USED); } macb_tx_unmap(bp, tx_skb, 0); } /* Set end of TX queue */ desc = macb_tx_desc(queue, 0); macb_set_addr(bp, desc, 0); desc->ctrl = MACB_BIT(TX_USED); /* Make descriptor updates visible to hardware */ wmb(); /* Reinitialize the TX desc queue */ queue_writel(queue, TBQP, lower_32_bits(queue->tx_ring_dma)); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (bp->hw_dma_cap & HW_DMA_CAP_64B) queue_writel(queue, TBQPH, upper_32_bits(queue->tx_ring_dma)); #endif /* Make TX ring reflect state of hardware */ queue->tx_head = 0; queue->tx_tail = 0; /* Housework before enabling TX IRQ */ macb_writel(bp, TSR, macb_readl(bp, TSR)); queue_writel(queue, IER, MACB_TX_INT_FLAGS); /* Now we are ready to start transmission again */ netif_tx_start_all_queues(bp->dev); macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); spin_unlock_irqrestore(&bp->lock, flags); napi_enable(&queue->napi_tx); } static bool ptp_one_step_sync(struct sk_buff *skb) { struct ptp_header *hdr; unsigned int ptp_class; u8 msgtype; /* No need to parse packet if PTP TS is not involved */ if (likely(!(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP))) goto not_oss; /* Identify and return whether PTP one step sync is being processed */ ptp_class = ptp_classify_raw(skb); if (ptp_class == PTP_CLASS_NONE) goto not_oss; hdr = ptp_parse_header(skb, ptp_class); if (!hdr) goto not_oss; if (hdr->flag_field[0] & PTP_FLAG_TWOSTEP) goto not_oss; msgtype = ptp_get_msgtype(hdr, ptp_class); if (msgtype == PTP_MSGTYPE_SYNC) return true; not_oss: return false; } static int macb_tx_complete(struct macb_queue *queue, int budget) { struct macb *bp = queue->bp; u16 queue_index = queue - bp->queues; unsigned int tail; unsigned int head; int packets = 0; spin_lock(&queue->tx_ptr_lock); head = queue->tx_head; for (tail = queue->tx_tail; tail != head && packets < budget; tail++) { struct macb_tx_skb *tx_skb; struct sk_buff *skb; struct macb_dma_desc *desc; u32 ctrl; desc = macb_tx_desc(queue, tail); /* Make hw descriptor updates visible to CPU */ rmb(); ctrl = desc->ctrl; /* TX_USED bit is only set by hardware on the very first buffer * descriptor of the transmitted frame. */ if (!(ctrl & MACB_BIT(TX_USED))) break; /* Process all buffers of the current transmitted frame */ for (;; tail++) { tx_skb = macb_tx_skb(queue, tail); skb = tx_skb->skb; /* First, update TX stats if needed */ if (skb) { if (unlikely(skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) && !ptp_one_step_sync(skb) && gem_ptp_do_txstamp(queue, skb, desc) == 0) { /* skb now belongs to timestamp buffer * and will be removed later */ tx_skb->skb = NULL; } netdev_vdbg(bp->dev, "skb %u (data %p) TX complete\n", macb_tx_ring_wrap(bp, tail), skb->data); bp->dev->stats.tx_packets++; queue->stats.tx_packets++; bp->dev->stats.tx_bytes += skb->len; queue->stats.tx_bytes += skb->len; packets++; } /* Now we can safely release resources */ macb_tx_unmap(bp, tx_skb, budget); /* skb is set only for the last buffer of the frame. * WARNING: at this point skb has been freed by * macb_tx_unmap(). */ if (skb) break; } } queue->tx_tail = tail; if (__netif_subqueue_stopped(bp->dev, queue_index) && CIRC_CNT(queue->tx_head, queue->tx_tail, bp->tx_ring_size) <= MACB_TX_WAKEUP_THRESH(bp)) netif_wake_subqueue(bp->dev, queue_index); spin_unlock(&queue->tx_ptr_lock); return packets; } static void gem_rx_refill(struct macb_queue *queue) { unsigned int entry; struct sk_buff *skb; dma_addr_t paddr; struct macb *bp = queue->bp; struct macb_dma_desc *desc; while (CIRC_SPACE(queue->rx_prepared_head, queue->rx_tail, bp->rx_ring_size) > 0) { entry = macb_rx_ring_wrap(bp, queue->rx_prepared_head); /* Make hw descriptor updates visible to CPU */ rmb(); desc = macb_rx_desc(queue, entry); if (!queue->rx_skbuff[entry]) { /* allocate sk_buff for this free entry in ring */ skb = netdev_alloc_skb(bp->dev, bp->rx_buffer_size); if (unlikely(!skb)) { netdev_err(bp->dev, "Unable to allocate sk_buff\n"); break; } /* now fill corresponding descriptor entry */ paddr = dma_map_single(&bp->pdev->dev, skb->data, bp->rx_buffer_size, DMA_FROM_DEVICE); if (dma_mapping_error(&bp->pdev->dev, paddr)) { dev_kfree_skb(skb); break; } queue->rx_skbuff[entry] = skb; if (entry == bp->rx_ring_size - 1) paddr |= MACB_BIT(RX_WRAP); desc->ctrl = 0; /* Setting addr clears RX_USED and allows reception, * make sure ctrl is cleared first to avoid a race. */ dma_wmb(); macb_set_addr(bp, desc, paddr); /* properly align Ethernet header */ skb_reserve(skb, NET_IP_ALIGN); } else { desc->ctrl = 0; dma_wmb(); desc->addr &= ~MACB_BIT(RX_USED); } queue->rx_prepared_head++; } /* Make descriptor updates visible to hardware */ wmb(); netdev_vdbg(bp->dev, "rx ring: queue: %p, prepared head %d, tail %d\n", queue, queue->rx_prepared_head, queue->rx_tail); } /* Mark DMA descriptors from begin up to and not including end as unused */ static void discard_partial_frame(struct macb_queue *queue, unsigned int begin, unsigned int end) { unsigned int frag; for (frag = begin; frag != end; frag++) { struct macb_dma_desc *desc = macb_rx_desc(queue, frag); desc->addr &= ~MACB_BIT(RX_USED); } /* Make descriptor updates visible to hardware */ wmb(); /* When this happens, the hardware stats registers for * whatever caused this is updated, so we don't have to record * anything. */ } static int gem_rx(struct macb_queue *queue, struct napi_struct *napi, int budget) { struct macb *bp = queue->bp; unsigned int len; unsigned int entry; struct sk_buff *skb; struct macb_dma_desc *desc; int count = 0; while (count < budget) { u32 ctrl; dma_addr_t addr; bool rxused; entry = macb_rx_ring_wrap(bp, queue->rx_tail); desc = macb_rx_desc(queue, entry); /* Make hw descriptor updates visible to CPU */ rmb(); rxused = (desc->addr & MACB_BIT(RX_USED)) ? true : false; addr = macb_get_addr(bp, desc); if (!rxused) break; /* Ensure ctrl is at least as up-to-date as rxused */ dma_rmb(); ctrl = desc->ctrl; queue->rx_tail++; count++; if (!(ctrl & MACB_BIT(RX_SOF) && ctrl & MACB_BIT(RX_EOF))) { netdev_err(bp->dev, "not whole frame pointed by descriptor\n"); bp->dev->stats.rx_dropped++; queue->stats.rx_dropped++; break; } skb = queue->rx_skbuff[entry]; if (unlikely(!skb)) { netdev_err(bp->dev, "inconsistent Rx descriptor chain\n"); bp->dev->stats.rx_dropped++; queue->stats.rx_dropped++; break; } /* now everything is ready for receiving packet */ queue->rx_skbuff[entry] = NULL; len = ctrl & bp->rx_frm_len_mask; netdev_vdbg(bp->dev, "gem_rx %u (len %u)\n", entry, len); skb_put(skb, len); dma_unmap_single(&bp->pdev->dev, addr, bp->rx_buffer_size, DMA_FROM_DEVICE); skb->protocol = eth_type_trans(skb, bp->dev); skb_checksum_none_assert(skb); if (bp->dev->features & NETIF_F_RXCSUM && !(bp->dev->flags & IFF_PROMISC) && GEM_BFEXT(RX_CSUM, ctrl) & GEM_RX_CSUM_CHECKED_MASK) skb->ip_summed = CHECKSUM_UNNECESSARY; bp->dev->stats.rx_packets++; queue->stats.rx_packets++; bp->dev->stats.rx_bytes += skb->len; queue->stats.rx_bytes += skb->len; gem_ptp_do_rxstamp(bp, skb, desc); #if defined(DEBUG) && defined(VERBOSE_DEBUG) netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n", skb->len, skb->csum); print_hex_dump(KERN_DEBUG, " mac: ", DUMP_PREFIX_ADDRESS, 16, 1, skb_mac_header(skb), 16, true); print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_ADDRESS, 16, 1, skb->data, 32, true); #endif napi_gro_receive(napi, skb); } gem_rx_refill(queue); return count; } static int macb_rx_frame(struct macb_queue *queue, struct napi_struct *napi, unsigned int first_frag, unsigned int last_frag) { unsigned int len; unsigned int frag; unsigned int offset; struct sk_buff *skb; struct macb_dma_desc *desc; struct macb *bp = queue->bp; desc = macb_rx_desc(queue, last_frag); len = desc->ctrl & bp->rx_frm_len_mask; netdev_vdbg(bp->dev, "macb_rx_frame frags %u - %u (len %u)\n", macb_rx_ring_wrap(bp, first_frag), macb_rx_ring_wrap(bp, last_frag), len); /* The ethernet header starts NET_IP_ALIGN bytes into the * first buffer. Since the header is 14 bytes, this makes the * payload word-aligned. * * Instead of calling skb_reserve(NET_IP_ALIGN), we just copy * the two padding bytes into the skb so that we avoid hitting * the slowpath in memcpy(), and pull them off afterwards. */ skb = netdev_alloc_skb(bp->dev, len + NET_IP_ALIGN); if (!skb) { bp->dev->stats.rx_dropped++; for (frag = first_frag; ; frag++) { desc = macb_rx_desc(queue, frag); desc->addr &= ~MACB_BIT(RX_USED); if (frag == last_frag) break; } /* Make descriptor updates visible to hardware */ wmb(); return 1; } offset = 0; len += NET_IP_ALIGN; skb_checksum_none_assert(skb); skb_put(skb, len); for (frag = first_frag; ; frag++) { unsigned int frag_len = bp->rx_buffer_size; if (offset + frag_len > len) { if (unlikely(frag != last_frag)) { dev_kfree_skb_any(skb); return -1; } frag_len = len - offset; } skb_copy_to_linear_data_offset(skb, offset, macb_rx_buffer(queue, frag), frag_len); offset += bp->rx_buffer_size; desc = macb_rx_desc(queue, frag); desc->addr &= ~MACB_BIT(RX_USED); if (frag == last_frag) break; } /* Make descriptor updates visible to hardware */ wmb(); __skb_pull(skb, NET_IP_ALIGN); skb->protocol = eth_type_trans(skb, bp->dev); bp->dev->stats.rx_packets++; bp->dev->stats.rx_bytes += skb->len; netdev_vdbg(bp->dev, "received skb of length %u, csum: %08x\n", skb->len, skb->csum); napi_gro_receive(napi, skb); return 0; } static inline void macb_init_rx_ring(struct macb_queue *queue) { struct macb *bp = queue->bp; dma_addr_t addr; struct macb_dma_desc *desc = NULL; int i; addr = queue->rx_buffers_dma; for (i = 0; i < bp->rx_ring_size; i++) { desc = macb_rx_desc(queue, i); macb_set_addr(bp, desc, addr); desc->ctrl = 0; addr += bp->rx_buffer_size; } desc->addr |= MACB_BIT(RX_WRAP); queue->rx_tail = 0; } static int macb_rx(struct macb_queue *queue, struct napi_struct *napi, int budget) { struct macb *bp = queue->bp; bool reset_rx_queue = false; int received = 0; unsigned int tail; int first_frag = -1; for (tail = queue->rx_tail; budget > 0; tail++) { struct macb_dma_desc *desc = macb_rx_desc(queue, tail); u32 ctrl; /* Make hw descriptor updates visible to CPU */ rmb(); if (!(desc->addr & MACB_BIT(RX_USED))) break; /* Ensure ctrl is at least as up-to-date as addr */ dma_rmb(); ctrl = desc->ctrl; if (ctrl & MACB_BIT(RX_SOF)) { if (first_frag != -1) discard_partial_frame(queue, first_frag, tail); first_frag = tail; } if (ctrl & MACB_BIT(RX_EOF)) { int dropped; if (unlikely(first_frag == -1)) { reset_rx_queue = true; continue; } dropped = macb_rx_frame(queue, napi, first_frag, tail); first_frag = -1; if (unlikely(dropped < 0)) { reset_rx_queue = true; continue; } if (!dropped) { received++; budget--; } } } if (unlikely(reset_rx_queue)) { unsigned long flags; u32 ctrl; netdev_err(bp->dev, "RX queue corruption: reset it\n"); spin_lock_irqsave(&bp->lock, flags); ctrl = macb_readl(bp, NCR); macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE)); macb_init_rx_ring(queue); queue_writel(queue, RBQP, queue->rx_ring_dma); macb_writel(bp, NCR, ctrl | MACB_BIT(RE)); spin_unlock_irqrestore(&bp->lock, flags); return received; } if (first_frag != -1) queue->rx_tail = first_frag; else queue->rx_tail = tail; return received; } static bool macb_rx_pending(struct macb_queue *queue) { struct macb *bp = queue->bp; unsigned int entry; struct macb_dma_desc *desc; entry = macb_rx_ring_wrap(bp, queue->rx_tail); desc = macb_rx_desc(queue, entry); /* Make hw descriptor updates visible to CPU */ rmb(); return (desc->addr & MACB_BIT(RX_USED)) != 0; } static int macb_rx_poll(struct napi_struct *napi, int budget) { struct macb_queue *queue = container_of(napi, struct macb_queue, napi_rx); struct macb *bp = queue->bp; int work_done; work_done = bp->macbgem_ops.mog_rx(queue, napi, budget); netdev_vdbg(bp->dev, "RX poll: queue = %u, work_done = %d, budget = %d\n", (unsigned int)(queue - bp->queues), work_done, budget); if (work_done < budget && napi_complete_done(napi, work_done)) { queue_writel(queue, IER, bp->rx_intr_mask); /* Packet completions only seem to propagate to raise * interrupts when interrupts are enabled at the time, so if * packets were received while interrupts were disabled, * they will not cause another interrupt to be generated when * interrupts are re-enabled. * Check for this case here to avoid losing a wakeup. This can * potentially race with the interrupt handler doing the same * actions if an interrupt is raised just after enabling them, * but this should be harmless. */ if (macb_rx_pending(queue)) { queue_writel(queue, IDR, bp->rx_intr_mask); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(RCOMP)); netdev_vdbg(bp->dev, "poll: packets pending, reschedule\n"); napi_schedule(napi); } } /* TODO: Handle errors */ return work_done; } static void macb_tx_restart(struct macb_queue *queue) { struct macb *bp = queue->bp; unsigned int head_idx, tbqp; spin_lock(&queue->tx_ptr_lock); if (queue->tx_head == queue->tx_tail) goto out_tx_ptr_unlock; tbqp = queue_readl(queue, TBQP) / macb_dma_desc_get_size(bp); tbqp = macb_adj_dma_desc_idx(bp, macb_tx_ring_wrap(bp, tbqp)); head_idx = macb_adj_dma_desc_idx(bp, macb_tx_ring_wrap(bp, queue->tx_head)); if (tbqp == head_idx) goto out_tx_ptr_unlock; spin_lock_irq(&bp->lock); macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); spin_unlock_irq(&bp->lock); out_tx_ptr_unlock: spin_unlock(&queue->tx_ptr_lock); } static bool macb_tx_complete_pending(struct macb_queue *queue) { bool retval = false; spin_lock(&queue->tx_ptr_lock); if (queue->tx_head != queue->tx_tail) { /* Make hw descriptor updates visible to CPU */ rmb(); if (macb_tx_desc(queue, queue->tx_tail)->ctrl & MACB_BIT(TX_USED)) retval = true; } spin_unlock(&queue->tx_ptr_lock); return retval; } static int macb_tx_poll(struct napi_struct *napi, int budget) { struct macb_queue *queue = container_of(napi, struct macb_queue, napi_tx); struct macb *bp = queue->bp; int work_done; work_done = macb_tx_complete(queue, budget); rmb(); // ensure txubr_pending is up to date if (queue->txubr_pending) { queue->txubr_pending = false; netdev_vdbg(bp->dev, "poll: tx restart\n"); macb_tx_restart(queue); } netdev_vdbg(bp->dev, "TX poll: queue = %u, work_done = %d, budget = %d\n", (unsigned int)(queue - bp->queues), work_done, budget); if (work_done < budget && napi_complete_done(napi, work_done)) { queue_writel(queue, IER, MACB_BIT(TCOMP)); /* Packet completions only seem to propagate to raise * interrupts when interrupts are enabled at the time, so if * packets were sent while interrupts were disabled, * they will not cause another interrupt to be generated when * interrupts are re-enabled. * Check for this case here to avoid losing a wakeup. This can * potentially race with the interrupt handler doing the same * actions if an interrupt is raised just after enabling them, * but this should be harmless. */ if (macb_tx_complete_pending(queue)) { queue_writel(queue, IDR, MACB_BIT(TCOMP)); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(TCOMP)); netdev_vdbg(bp->dev, "TX poll: packets pending, reschedule\n"); napi_schedule(napi); } } return work_done; } static void macb_hresp_error_task(struct tasklet_struct *t) { struct macb *bp = from_tasklet(bp, t, hresp_err_tasklet); struct net_device *dev = bp->dev; struct macb_queue *queue; unsigned int q; u32 ctrl; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { queue_writel(queue, IDR, bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP)); } ctrl = macb_readl(bp, NCR); ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE)); macb_writel(bp, NCR, ctrl); netif_tx_stop_all_queues(dev); netif_carrier_off(dev); bp->macbgem_ops.mog_init_rings(bp); /* Initialize TX and RX buffers */ macb_init_buffers(bp); /* Enable interrupts */ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) queue_writel(queue, IER, bp->rx_intr_mask | MACB_TX_INT_FLAGS | MACB_BIT(HRESP)); ctrl |= MACB_BIT(RE) | MACB_BIT(TE); macb_writel(bp, NCR, ctrl); netif_carrier_on(dev); netif_tx_start_all_queues(dev); } static irqreturn_t macb_wol_interrupt(int irq, void *dev_id) { struct macb_queue *queue = dev_id; struct macb *bp = queue->bp; u32 status; status = queue_readl(queue, ISR); if (unlikely(!status)) return IRQ_NONE; spin_lock(&bp->lock); if (status & MACB_BIT(WOL)) { queue_writel(queue, IDR, MACB_BIT(WOL)); macb_writel(bp, WOL, 0); netdev_vdbg(bp->dev, "MACB WoL: queue = %u, isr = 0x%08lx\n", (unsigned int)(queue - bp->queues), (unsigned long)status); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(WOL)); pm_wakeup_event(&bp->pdev->dev, 0); } spin_unlock(&bp->lock); return IRQ_HANDLED; } static irqreturn_t gem_wol_interrupt(int irq, void *dev_id) { struct macb_queue *queue = dev_id; struct macb *bp = queue->bp; u32 status; status = queue_readl(queue, ISR); if (unlikely(!status)) return IRQ_NONE; spin_lock(&bp->lock); if (status & GEM_BIT(WOL)) { queue_writel(queue, IDR, GEM_BIT(WOL)); gem_writel(bp, WOL, 0); netdev_vdbg(bp->dev, "GEM WoL: queue = %u, isr = 0x%08lx\n", (unsigned int)(queue - bp->queues), (unsigned long)status); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, GEM_BIT(WOL)); pm_wakeup_event(&bp->pdev->dev, 0); } spin_unlock(&bp->lock); return IRQ_HANDLED; } static irqreturn_t macb_interrupt(int irq, void *dev_id) { struct macb_queue *queue = dev_id; struct macb *bp = queue->bp; struct net_device *dev = bp->dev; u32 status, ctrl; status = queue_readl(queue, ISR); if (unlikely(!status)) return IRQ_NONE; spin_lock(&bp->lock); while (status) { /* close possible race with dev_close */ if (unlikely(!netif_running(dev))) { queue_writel(queue, IDR, -1); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, -1); break; } netdev_vdbg(bp->dev, "queue = %u, isr = 0x%08lx\n", (unsigned int)(queue - bp->queues), (unsigned long)status); if (status & bp->rx_intr_mask) { /* There's no point taking any more interrupts * until we have processed the buffers. The * scheduling call may fail if the poll routine * is already scheduled, so disable interrupts * now. */ queue_writel(queue, IDR, bp->rx_intr_mask); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(RCOMP)); if (napi_schedule_prep(&queue->napi_rx)) { netdev_vdbg(bp->dev, "scheduling RX softirq\n"); __napi_schedule(&queue->napi_rx); } } if (status & (MACB_BIT(TCOMP) | MACB_BIT(TXUBR))) { queue_writel(queue, IDR, MACB_BIT(TCOMP)); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(TCOMP) | MACB_BIT(TXUBR)); if (status & MACB_BIT(TXUBR)) { queue->txubr_pending = true; wmb(); // ensure softirq can see update } if (napi_schedule_prep(&queue->napi_tx)) { netdev_vdbg(bp->dev, "scheduling TX softirq\n"); __napi_schedule(&queue->napi_tx); } } if (unlikely(status & (MACB_TX_ERR_FLAGS))) { queue_writel(queue, IDR, MACB_TX_INT_FLAGS); schedule_work(&queue->tx_error_task); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_TX_ERR_FLAGS); break; } /* Link change detection isn't possible with RMII, so we'll * add that if/when we get our hands on a full-blown MII PHY. */ /* There is a hardware issue under heavy load where DMA can * stop, this causes endless "used buffer descriptor read" * interrupts but it can be cleared by re-enabling RX. See * the at91rm9200 manual, section 41.3.1 or the Zynq manual * section 16.7.4 for details. RXUBR is only enabled for * these two versions. */ if (status & MACB_BIT(RXUBR)) { ctrl = macb_readl(bp, NCR); macb_writel(bp, NCR, ctrl & ~MACB_BIT(RE)); wmb(); macb_writel(bp, NCR, ctrl | MACB_BIT(RE)); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(RXUBR)); } if (status & MACB_BIT(ISR_ROVR)) { /* We missed at least one packet */ if (macb_is_gem(bp)) bp->hw_stats.gem.rx_overruns++; else bp->hw_stats.macb.rx_overruns++; if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(ISR_ROVR)); } if (status & MACB_BIT(HRESP)) { tasklet_schedule(&bp->hresp_err_tasklet); netdev_err(dev, "DMA bus error: HRESP not OK\n"); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, MACB_BIT(HRESP)); } status = queue_readl(queue, ISR); } spin_unlock(&bp->lock); return IRQ_HANDLED; } #ifdef CONFIG_NET_POLL_CONTROLLER /* Polling receive - used by netconsole and other diagnostic tools * to allow network i/o with interrupts disabled. */ static void macb_poll_controller(struct net_device *dev) { struct macb *bp = netdev_priv(dev); struct macb_queue *queue; unsigned long flags; unsigned int q; local_irq_save(flags); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) macb_interrupt(dev->irq, queue); local_irq_restore(flags); } #endif static unsigned int macb_tx_map(struct macb *bp, struct macb_queue *queue, struct sk_buff *skb, unsigned int hdrlen) { dma_addr_t mapping; unsigned int len, entry, i, tx_head = queue->tx_head; struct macb_tx_skb *tx_skb = NULL; struct macb_dma_desc *desc; unsigned int offset, size, count = 0; unsigned int f, nr_frags = skb_shinfo(skb)->nr_frags; unsigned int eof = 1, mss_mfs = 0; u32 ctrl, lso_ctrl = 0, seq_ctrl = 0; /* LSO */ if (skb_shinfo(skb)->gso_size != 0) { if (ip_hdr(skb)->protocol == IPPROTO_UDP) /* UDP - UFO */ lso_ctrl = MACB_LSO_UFO_ENABLE; else /* TCP - TSO */ lso_ctrl = MACB_LSO_TSO_ENABLE; } /* First, map non-paged data */ len = skb_headlen(skb); /* first buffer length */ size = hdrlen; offset = 0; while (len) { entry = macb_tx_ring_wrap(bp, tx_head); tx_skb = &queue->tx_skb[entry]; mapping = dma_map_single(&bp->pdev->dev, skb->data + offset, size, DMA_TO_DEVICE); if (dma_mapping_error(&bp->pdev->dev, mapping)) goto dma_error; /* Save info to properly release resources */ tx_skb->skb = NULL; tx_skb->mapping = mapping; tx_skb->size = size; tx_skb->mapped_as_page = false; len -= size; offset += size; count++; tx_head++; size = min(len, bp->max_tx_length); } /* Then, map paged data from fragments */ for (f = 0; f < nr_frags; f++) { const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; len = skb_frag_size(frag); offset = 0; while (len) { size = min(len, bp->max_tx_length); entry = macb_tx_ring_wrap(bp, tx_head); tx_skb = &queue->tx_skb[entry]; mapping = skb_frag_dma_map(&bp->pdev->dev, frag, offset, size, DMA_TO_DEVICE); if (dma_mapping_error(&bp->pdev->dev, mapping)) goto dma_error; /* Save info to properly release resources */ tx_skb->skb = NULL; tx_skb->mapping = mapping; tx_skb->size = size; tx_skb->mapped_as_page = true; len -= size; offset += size; count++; tx_head++; } } /* Should never happen */ if (unlikely(!tx_skb)) { netdev_err(bp->dev, "BUG! empty skb!\n"); return 0; } /* This is the last buffer of the frame: save socket buffer */ tx_skb->skb = skb; /* Update TX ring: update buffer descriptors in reverse order * to avoid race condition */ /* Set 'TX_USED' bit in buffer descriptor at tx_head position * to set the end of TX queue */ i = tx_head; entry = macb_tx_ring_wrap(bp, i); ctrl = MACB_BIT(TX_USED); desc = macb_tx_desc(queue, entry); desc->ctrl = ctrl; if (lso_ctrl) { if (lso_ctrl == MACB_LSO_UFO_ENABLE) /* include header and FCS in value given to h/w */ mss_mfs = skb_shinfo(skb)->gso_size + skb_transport_offset(skb) + ETH_FCS_LEN; else /* TSO */ { mss_mfs = skb_shinfo(skb)->gso_size; /* TCP Sequence Number Source Select * can be set only for TSO */ seq_ctrl = 0; } } do { i--; entry = macb_tx_ring_wrap(bp, i); tx_skb = &queue->tx_skb[entry]; desc = macb_tx_desc(queue, entry); ctrl = (u32)tx_skb->size; if (eof) { ctrl |= MACB_BIT(TX_LAST); eof = 0; } if (unlikely(entry == (bp->tx_ring_size - 1))) ctrl |= MACB_BIT(TX_WRAP); /* First descriptor is header descriptor */ if (i == queue->tx_head) { ctrl |= MACB_BF(TX_LSO, lso_ctrl); ctrl |= MACB_BF(TX_TCP_SEQ_SRC, seq_ctrl); if ((bp->dev->features & NETIF_F_HW_CSUM) && skb->ip_summed != CHECKSUM_PARTIAL && !lso_ctrl && !ptp_one_step_sync(skb)) ctrl |= MACB_BIT(TX_NOCRC); } else /* Only set MSS/MFS on payload descriptors * (second or later descriptor) */ ctrl |= MACB_BF(MSS_MFS, mss_mfs); /* Set TX buffer descriptor */ macb_set_addr(bp, desc, tx_skb->mapping); /* desc->addr must be visible to hardware before clearing * 'TX_USED' bit in desc->ctrl. */ wmb(); desc->ctrl = ctrl; } while (i != queue->tx_head); queue->tx_head = tx_head; return count; dma_error: netdev_err(bp->dev, "TX DMA map failed\n"); for (i = queue->tx_head; i != tx_head; i++) { tx_skb = macb_tx_skb(queue, i); macb_tx_unmap(bp, tx_skb, 0); } return 0; } static netdev_features_t macb_features_check(struct sk_buff *skb, struct net_device *dev, netdev_features_t features) { unsigned int nr_frags, f; unsigned int hdrlen; /* Validate LSO compatibility */ /* there is only one buffer or protocol is not UDP */ if (!skb_is_nonlinear(skb) || (ip_hdr(skb)->protocol != IPPROTO_UDP)) return features; /* length of header */ hdrlen = skb_transport_offset(skb); /* For UFO only: * When software supplies two or more payload buffers all payload buffers * apart from the last must be a multiple of 8 bytes in size. */ if (!IS_ALIGNED(skb_headlen(skb) - hdrlen, MACB_TX_LEN_ALIGN)) return features & ~MACB_NETIF_LSO; nr_frags = skb_shinfo(skb)->nr_frags; /* No need to check last fragment */ nr_frags--; for (f = 0; f < nr_frags; f++) { const skb_frag_t *frag = &skb_shinfo(skb)->frags[f]; if (!IS_ALIGNED(skb_frag_size(frag), MACB_TX_LEN_ALIGN)) return features & ~MACB_NETIF_LSO; } return features; } static inline int macb_clear_csum(struct sk_buff *skb) { /* no change for packets without checksum offloading */ if (skb->ip_summed != CHECKSUM_PARTIAL) return 0; /* make sure we can modify the header */ if (unlikely(skb_cow_head(skb, 0))) return -1; /* initialize checksum field * This is required - at least for Zynq, which otherwise calculates * wrong UDP header checksums for UDP packets with UDP data len <=2 */ *(__sum16 *)(skb_checksum_start(skb) + skb->csum_offset) = 0; return 0; } static int macb_pad_and_fcs(struct sk_buff **skb, struct net_device *ndev) { bool cloned = skb_cloned(*skb) || skb_header_cloned(*skb) || skb_is_nonlinear(*skb); int padlen = ETH_ZLEN - (*skb)->len; int headroom = skb_headroom(*skb); int tailroom = skb_tailroom(*skb); struct sk_buff *nskb; u32 fcs; if (!(ndev->features & NETIF_F_HW_CSUM) || !((*skb)->ip_summed != CHECKSUM_PARTIAL) || skb_shinfo(*skb)->gso_size || ptp_one_step_sync(*skb)) return 0; if (padlen <= 0) { /* FCS could be appeded to tailroom. */ if (tailroom >= ETH_FCS_LEN) goto add_fcs; /* FCS could be appeded by moving data to headroom. */ else if (!cloned && headroom + tailroom >= ETH_FCS_LEN) padlen = 0; /* No room for FCS, need to reallocate skb. */ else padlen = ETH_FCS_LEN; } else { /* Add room for FCS. */ padlen += ETH_FCS_LEN; } if (!cloned && headroom + tailroom >= padlen) { (*skb)->data = memmove((*skb)->head, (*skb)->data, (*skb)->len); skb_set_tail_pointer(*skb, (*skb)->len); } else { nskb = skb_copy_expand(*skb, 0, padlen, GFP_ATOMIC); if (!nskb) return -ENOMEM; dev_consume_skb_any(*skb); *skb = nskb; } if (padlen > ETH_FCS_LEN) skb_put_zero(*skb, padlen - ETH_FCS_LEN); add_fcs: /* set FCS to packet */ fcs = crc32_le(~0, (*skb)->data, (*skb)->len); fcs = ~fcs; skb_put_u8(*skb, fcs & 0xff); skb_put_u8(*skb, (fcs >> 8) & 0xff); skb_put_u8(*skb, (fcs >> 16) & 0xff); skb_put_u8(*skb, (fcs >> 24) & 0xff); return 0; } static netdev_tx_t macb_start_xmit(struct sk_buff *skb, struct net_device *dev) { u16 queue_index = skb_get_queue_mapping(skb); struct macb *bp = netdev_priv(dev); struct macb_queue *queue = &bp->queues[queue_index]; unsigned int desc_cnt, nr_frags, frag_size, f; unsigned int hdrlen; bool is_lso; netdev_tx_t ret = NETDEV_TX_OK; if (macb_clear_csum(skb)) { dev_kfree_skb_any(skb); return ret; } if (macb_pad_and_fcs(&skb, dev)) { dev_kfree_skb_any(skb); return ret; } is_lso = (skb_shinfo(skb)->gso_size != 0); if (is_lso) { /* length of headers */ if (ip_hdr(skb)->protocol == IPPROTO_UDP) /* only queue eth + ip headers separately for UDP */ hdrlen = skb_transport_offset(skb); else hdrlen = skb_tcp_all_headers(skb); if (skb_headlen(skb) < hdrlen) { netdev_err(bp->dev, "Error - LSO headers fragmented!!!\n"); /* if this is required, would need to copy to single buffer */ return NETDEV_TX_BUSY; } } else hdrlen = min(skb_headlen(skb), bp->max_tx_length); #if defined(DEBUG) && defined(VERBOSE_DEBUG) netdev_vdbg(bp->dev, "start_xmit: queue %hu len %u head %p data %p tail %p end %p\n", queue_index, skb->len, skb->head, skb->data, skb_tail_pointer(skb), skb_end_pointer(skb)); print_hex_dump(KERN_DEBUG, "data: ", DUMP_PREFIX_OFFSET, 16, 1, skb->data, 16, true); #endif /* Count how many TX buffer descriptors are needed to send this * socket buffer: skb fragments of jumbo frames may need to be * split into many buffer descriptors. */ if (is_lso && (skb_headlen(skb) > hdrlen)) /* extra header descriptor if also payload in first buffer */ desc_cnt = DIV_ROUND_UP((skb_headlen(skb) - hdrlen), bp->max_tx_length) + 1; else desc_cnt = DIV_ROUND_UP(skb_headlen(skb), bp->max_tx_length); nr_frags = skb_shinfo(skb)->nr_frags; for (f = 0; f < nr_frags; f++) { frag_size = skb_frag_size(&skb_shinfo(skb)->frags[f]); desc_cnt += DIV_ROUND_UP(frag_size, bp->max_tx_length); } spin_lock_bh(&queue->tx_ptr_lock); /* This is a hard error, log it. */ if (CIRC_SPACE(queue->tx_head, queue->tx_tail, bp->tx_ring_size) < desc_cnt) { netif_stop_subqueue(dev, queue_index); netdev_dbg(bp->dev, "tx_head = %u, tx_tail = %u\n", queue->tx_head, queue->tx_tail); ret = NETDEV_TX_BUSY; goto unlock; } /* Map socket buffer for DMA transfer */ if (!macb_tx_map(bp, queue, skb, hdrlen)) { dev_kfree_skb_any(skb); goto unlock; } /* Make newly initialized descriptor visible to hardware */ wmb(); skb_tx_timestamp(skb); spin_lock_irq(&bp->lock); macb_writel(bp, NCR, macb_readl(bp, NCR) | MACB_BIT(TSTART)); spin_unlock_irq(&bp->lock); if (CIRC_SPACE(queue->tx_head, queue->tx_tail, bp->tx_ring_size) < 1) netif_stop_subqueue(dev, queue_index); unlock: spin_unlock_bh(&queue->tx_ptr_lock); return ret; } static void macb_init_rx_buffer_size(struct macb *bp, size_t size) { if (!macb_is_gem(bp)) { bp->rx_buffer_size = MACB_RX_BUFFER_SIZE; } else { bp->rx_buffer_size = size; if (bp->rx_buffer_size % RX_BUFFER_MULTIPLE) { netdev_dbg(bp->dev, "RX buffer must be multiple of %d bytes, expanding\n", RX_BUFFER_MULTIPLE); bp->rx_buffer_size = roundup(bp->rx_buffer_size, RX_BUFFER_MULTIPLE); } } netdev_dbg(bp->dev, "mtu [%u] rx_buffer_size [%zu]\n", bp->dev->mtu, bp->rx_buffer_size); } static void gem_free_rx_buffers(struct macb *bp) { struct sk_buff *skb; struct macb_dma_desc *desc; struct macb_queue *queue; dma_addr_t addr; unsigned int q; int i; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { if (!queue->rx_skbuff) continue; for (i = 0; i < bp->rx_ring_size; i++) { skb = queue->rx_skbuff[i]; if (!skb) continue; desc = macb_rx_desc(queue, i); addr = macb_get_addr(bp, desc); dma_unmap_single(&bp->pdev->dev, addr, bp->rx_buffer_size, DMA_FROM_DEVICE); dev_kfree_skb_any(skb); skb = NULL; } kfree(queue->rx_skbuff); queue->rx_skbuff = NULL; } } static void macb_free_rx_buffers(struct macb *bp) { struct macb_queue *queue = &bp->queues[0]; if (queue->rx_buffers) { dma_free_coherent(&bp->pdev->dev, bp->rx_ring_size * bp->rx_buffer_size, queue->rx_buffers, queue->rx_buffers_dma); queue->rx_buffers = NULL; } } static void macb_free_consistent(struct macb *bp) { struct macb_queue *queue; unsigned int q; int size; bp->macbgem_ops.mog_free_rx_buffers(bp); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { kfree(queue->tx_skb); queue->tx_skb = NULL; if (queue->tx_ring) { size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch; dma_free_coherent(&bp->pdev->dev, size, queue->tx_ring, queue->tx_ring_dma); queue->tx_ring = NULL; } if (queue->rx_ring) { size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch; dma_free_coherent(&bp->pdev->dev, size, queue->rx_ring, queue->rx_ring_dma); queue->rx_ring = NULL; } } } static int gem_alloc_rx_buffers(struct macb *bp) { struct macb_queue *queue; unsigned int q; int size; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { size = bp->rx_ring_size * sizeof(struct sk_buff *); queue->rx_skbuff = kzalloc(size, GFP_KERNEL); if (!queue->rx_skbuff) return -ENOMEM; else netdev_dbg(bp->dev, "Allocated %d RX struct sk_buff entries at %p\n", bp->rx_ring_size, queue->rx_skbuff); } return 0; } static int macb_alloc_rx_buffers(struct macb *bp) { struct macb_queue *queue = &bp->queues[0]; int size; size = bp->rx_ring_size * bp->rx_buffer_size; queue->rx_buffers = dma_alloc_coherent(&bp->pdev->dev, size, &queue->rx_buffers_dma, GFP_KERNEL); if (!queue->rx_buffers) return -ENOMEM; netdev_dbg(bp->dev, "Allocated RX buffers of %d bytes at %08lx (mapped %p)\n", size, (unsigned long)queue->rx_buffers_dma, queue->rx_buffers); return 0; } static int macb_alloc_consistent(struct macb *bp) { struct macb_queue *queue; unsigned int q; int size; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { size = TX_RING_BYTES(bp) + bp->tx_bd_rd_prefetch; queue->tx_ring = dma_alloc_coherent(&bp->pdev->dev, size, &queue->tx_ring_dma, GFP_KERNEL); if (!queue->tx_ring) goto out_err; netdev_dbg(bp->dev, "Allocated TX ring for queue %u of %d bytes at %08lx (mapped %p)\n", q, size, (unsigned long)queue->tx_ring_dma, queue->tx_ring); size = bp->tx_ring_size * sizeof(struct macb_tx_skb); queue->tx_skb = kmalloc(size, GFP_KERNEL); if (!queue->tx_skb) goto out_err; size = RX_RING_BYTES(bp) + bp->rx_bd_rd_prefetch; queue->rx_ring = dma_alloc_coherent(&bp->pdev->dev, size, &queue->rx_ring_dma, GFP_KERNEL); if (!queue->rx_ring) goto out_err; netdev_dbg(bp->dev, "Allocated RX ring of %d bytes at %08lx (mapped %p)\n", size, (unsigned long)queue->rx_ring_dma, queue->rx_ring); } if (bp->macbgem_ops.mog_alloc_rx_buffers(bp)) goto out_err; return 0; out_err: macb_free_consistent(bp); return -ENOMEM; } static void gem_init_rings(struct macb *bp) { struct macb_queue *queue; struct macb_dma_desc *desc = NULL; unsigned int q; int i; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { for (i = 0; i < bp->tx_ring_size; i++) { desc = macb_tx_desc(queue, i); macb_set_addr(bp, desc, 0); desc->ctrl = MACB_BIT(TX_USED); } desc->ctrl |= MACB_BIT(TX_WRAP); queue->tx_head = 0; queue->tx_tail = 0; queue->rx_tail = 0; queue->rx_prepared_head = 0; gem_rx_refill(queue); } } static void macb_init_rings(struct macb *bp) { int i; struct macb_dma_desc *desc = NULL; macb_init_rx_ring(&bp->queues[0]); for (i = 0; i < bp->tx_ring_size; i++) { desc = macb_tx_desc(&bp->queues[0], i); macb_set_addr(bp, desc, 0); desc->ctrl = MACB_BIT(TX_USED); } bp->queues[0].tx_head = 0; bp->queues[0].tx_tail = 0; desc->ctrl |= MACB_BIT(TX_WRAP); } static void macb_reset_hw(struct macb *bp) { struct macb_queue *queue; unsigned int q; u32 ctrl = macb_readl(bp, NCR); /* Disable RX and TX (XXX: Should we halt the transmission * more gracefully?) */ ctrl &= ~(MACB_BIT(RE) | MACB_BIT(TE)); /* Clear the stats registers (XXX: Update stats first?) */ ctrl |= MACB_BIT(CLRSTAT); macb_writel(bp, NCR, ctrl); /* Clear all status flags */ macb_writel(bp, TSR, -1); macb_writel(bp, RSR, -1); /* Disable all interrupts */ for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { queue_writel(queue, IDR, -1); queue_readl(queue, ISR); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, -1); } } static u32 gem_mdc_clk_div(struct macb *bp) { u32 config; unsigned long pclk_hz = clk_get_rate(bp->pclk); if (pclk_hz <= 20000000) config = GEM_BF(CLK, GEM_CLK_DIV8); else if (pclk_hz <= 40000000) config = GEM_BF(CLK, GEM_CLK_DIV16); else if (pclk_hz <= 80000000) config = GEM_BF(CLK, GEM_CLK_DIV32); else if (pclk_hz <= 120000000) config = GEM_BF(CLK, GEM_CLK_DIV48); else if (pclk_hz <= 160000000) config = GEM_BF(CLK, GEM_CLK_DIV64); else config = GEM_BF(CLK, GEM_CLK_DIV96); return config; } static u32 macb_mdc_clk_div(struct macb *bp) { u32 config; unsigned long pclk_hz; if (macb_is_gem(bp)) return gem_mdc_clk_div(bp); pclk_hz = clk_get_rate(bp->pclk); if (pclk_hz <= 20000000) config = MACB_BF(CLK, MACB_CLK_DIV8); else if (pclk_hz <= 40000000) config = MACB_BF(CLK, MACB_CLK_DIV16); else if (pclk_hz <= 80000000) config = MACB_BF(CLK, MACB_CLK_DIV32); else config = MACB_BF(CLK, MACB_CLK_DIV64); return config; } /* Get the DMA bus width field of the network configuration register that we * should program. We find the width from decoding the design configuration * register to find the maximum supported data bus width. */ static u32 macb_dbw(struct macb *bp) { if (!macb_is_gem(bp)) return 0; switch (GEM_BFEXT(DBWDEF, gem_readl(bp, DCFG1))) { case 4: return GEM_BF(DBW, GEM_DBW128); case 2: return GEM_BF(DBW, GEM_DBW64); case 1: default: return GEM_BF(DBW, GEM_DBW32); } } /* Configure the receive DMA engine * - use the correct receive buffer size * - set best burst length for DMA operations * (if not supported by FIFO, it will fallback to default) * - set both rx/tx packet buffers to full memory size * These are configurable parameters for GEM. */ static void macb_configure_dma(struct macb *bp) { struct macb_queue *queue; u32 buffer_size; unsigned int q; u32 dmacfg; buffer_size = bp->rx_buffer_size / RX_BUFFER_MULTIPLE; if (macb_is_gem(bp)) { dmacfg = gem_readl(bp, DMACFG) & ~GEM_BF(RXBS, -1L); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { if (q) queue_writel(queue, RBQS, buffer_size); else dmacfg |= GEM_BF(RXBS, buffer_size); } if (bp->dma_burst_length) dmacfg = GEM_BFINS(FBLDO, bp->dma_burst_length, dmacfg); dmacfg |= GEM_BIT(TXPBMS) | GEM_BF(RXBMS, -1L); dmacfg &= ~GEM_BIT(ENDIA_PKT); if (bp->native_io) dmacfg &= ~GEM_BIT(ENDIA_DESC); else dmacfg |= GEM_BIT(ENDIA_DESC); /* CPU in big endian */ if (bp->dev->features & NETIF_F_HW_CSUM) dmacfg |= GEM_BIT(TXCOEN); else dmacfg &= ~GEM_BIT(TXCOEN); dmacfg &= ~GEM_BIT(ADDR64); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (bp->hw_dma_cap & HW_DMA_CAP_64B) dmacfg |= GEM_BIT(ADDR64); #endif #ifdef CONFIG_MACB_USE_HWSTAMP if (bp->hw_dma_cap & HW_DMA_CAP_PTP) dmacfg |= GEM_BIT(RXEXT) | GEM_BIT(TXEXT); #endif netdev_dbg(bp->dev, "Cadence configure DMA with 0x%08x\n", dmacfg); gem_writel(bp, DMACFG, dmacfg); } } static void macb_init_hw(struct macb *bp) { u32 config; macb_reset_hw(bp); macb_set_hwaddr(bp); config = macb_mdc_clk_div(bp); config |= MACB_BF(RBOF, NET_IP_ALIGN); /* Make eth data aligned */ config |= MACB_BIT(DRFCS); /* Discard Rx FCS */ if (bp->caps & MACB_CAPS_JUMBO) config |= MACB_BIT(JFRAME); /* Enable jumbo frames */ else config |= MACB_BIT(BIG); /* Receive oversized frames */ if (bp->dev->flags & IFF_PROMISC) config |= MACB_BIT(CAF); /* Copy All Frames */ else if (macb_is_gem(bp) && bp->dev->features & NETIF_F_RXCSUM) config |= GEM_BIT(RXCOEN); if (!(bp->dev->flags & IFF_BROADCAST)) config |= MACB_BIT(NBC); /* No BroadCast */ config |= macb_dbw(bp); macb_writel(bp, NCFGR, config); if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len) gem_writel(bp, JML, bp->jumbo_max_len); bp->rx_frm_len_mask = MACB_RX_FRMLEN_MASK; if (bp->caps & MACB_CAPS_JUMBO) bp->rx_frm_len_mask = MACB_RX_JFRMLEN_MASK; macb_configure_dma(bp); } /* The hash address register is 64 bits long and takes up two * locations in the memory map. The least significant bits are stored * in EMAC_HSL and the most significant bits in EMAC_HSH. * * The unicast hash enable and the multicast hash enable bits in the * network configuration register enable the reception of hash matched * frames. The destination address is reduced to a 6 bit index into * the 64 bit hash register using the following hash function. The * hash function is an exclusive or of every sixth bit of the * destination address. * * hi[5] = da[5] ^ da[11] ^ da[17] ^ da[23] ^ da[29] ^ da[35] ^ da[41] ^ da[47] * hi[4] = da[4] ^ da[10] ^ da[16] ^ da[22] ^ da[28] ^ da[34] ^ da[40] ^ da[46] * hi[3] = da[3] ^ da[09] ^ da[15] ^ da[21] ^ da[27] ^ da[33] ^ da[39] ^ da[45] * hi[2] = da[2] ^ da[08] ^ da[14] ^ da[20] ^ da[26] ^ da[32] ^ da[38] ^ da[44] * hi[1] = da[1] ^ da[07] ^ da[13] ^ da[19] ^ da[25] ^ da[31] ^ da[37] ^ da[43] * hi[0] = da[0] ^ da[06] ^ da[12] ^ da[18] ^ da[24] ^ da[30] ^ da[36] ^ da[42] * * da[0] represents the least significant bit of the first byte * received, that is, the multicast/unicast indicator, and da[47] * represents the most significant bit of the last byte received. If * the hash index, hi[n], points to a bit that is set in the hash * register then the frame will be matched according to whether the * frame is multicast or unicast. A multicast match will be signalled * if the multicast hash enable bit is set, da[0] is 1 and the hash * index points to a bit set in the hash register. A unicast match * will be signalled if the unicast hash enable bit is set, da[0] is 0 * and the hash index points to a bit set in the hash register. To * receive all multicast frames, the hash register should be set with * all ones and the multicast hash enable bit should be set in the * network configuration register. */ static inline int hash_bit_value(int bitnr, __u8 *addr) { if (addr[bitnr / 8] & (1 << (bitnr % 8))) return 1; return 0; } /* Return the hash index value for the specified address. */ static int hash_get_index(__u8 *addr) { int i, j, bitval; int hash_index = 0; for (j = 0; j < 6; j++) { for (i = 0, bitval = 0; i < 8; i++) bitval ^= hash_bit_value(i * 6 + j, addr); hash_index |= (bitval << j); } return hash_index; } /* Add multicast addresses to the internal multicast-hash table. */ static void macb_sethashtable(struct net_device *dev) { struct netdev_hw_addr *ha; unsigned long mc_filter[2]; unsigned int bitnr; struct macb *bp = netdev_priv(dev); mc_filter[0] = 0; mc_filter[1] = 0; netdev_for_each_mc_addr(ha, dev) { bitnr = hash_get_index(ha->addr); mc_filter[bitnr >> 5] |= 1 << (bitnr & 31); } macb_or_gem_writel(bp, HRB, mc_filter[0]); macb_or_gem_writel(bp, HRT, mc_filter[1]); } /* Enable/Disable promiscuous and multicast modes. */ static void macb_set_rx_mode(struct net_device *dev) { unsigned long cfg; struct macb *bp = netdev_priv(dev); cfg = macb_readl(bp, NCFGR); if (dev->flags & IFF_PROMISC) { /* Enable promiscuous mode */ cfg |= MACB_BIT(CAF); /* Disable RX checksum offload */ if (macb_is_gem(bp)) cfg &= ~GEM_BIT(RXCOEN); } else { /* Disable promiscuous mode */ cfg &= ~MACB_BIT(CAF); /* Enable RX checksum offload only if requested */ if (macb_is_gem(bp) && dev->features & NETIF_F_RXCSUM) cfg |= GEM_BIT(RXCOEN); } if (dev->flags & IFF_ALLMULTI) { /* Enable all multicast mode */ macb_or_gem_writel(bp, HRB, -1); macb_or_gem_writel(bp, HRT, -1); cfg |= MACB_BIT(NCFGR_MTI); } else if (!netdev_mc_empty(dev)) { /* Enable specific multicasts */ macb_sethashtable(dev); cfg |= MACB_BIT(NCFGR_MTI); } else if (dev->flags & (~IFF_ALLMULTI)) { /* Disable all multicast mode */ macb_or_gem_writel(bp, HRB, 0); macb_or_gem_writel(bp, HRT, 0); cfg &= ~MACB_BIT(NCFGR_MTI); } macb_writel(bp, NCFGR, cfg); } static int macb_open(struct net_device *dev) { size_t bufsz = dev->mtu + ETH_HLEN + ETH_FCS_LEN + NET_IP_ALIGN; struct macb *bp = netdev_priv(dev); struct macb_queue *queue; unsigned int q; int err; netdev_dbg(bp->dev, "open\n"); err = pm_runtime_resume_and_get(&bp->pdev->dev); if (err < 0) return err; /* RX buffers initialization */ macb_init_rx_buffer_size(bp, bufsz); err = macb_alloc_consistent(bp); if (err) { netdev_err(dev, "Unable to allocate DMA memory (error %d)\n", err); goto pm_exit; } for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { napi_enable(&queue->napi_rx); napi_enable(&queue->napi_tx); } macb_init_hw(bp); err = phy_power_on(bp->sgmii_phy); if (err) goto reset_hw; err = macb_phylink_connect(bp); if (err) goto phy_off; netif_tx_start_all_queues(dev); if (bp->ptp_info) bp->ptp_info->ptp_init(dev); return 0; phy_off: phy_power_off(bp->sgmii_phy); reset_hw: macb_reset_hw(bp); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { napi_disable(&queue->napi_rx); napi_disable(&queue->napi_tx); } macb_free_consistent(bp); pm_exit: pm_runtime_put_sync(&bp->pdev->dev); return err; } static int macb_close(struct net_device *dev) { struct macb *bp = netdev_priv(dev); struct macb_queue *queue; unsigned long flags; unsigned int q; netif_tx_stop_all_queues(dev); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { napi_disable(&queue->napi_rx); napi_disable(&queue->napi_tx); } phylink_stop(bp->phylink); phylink_disconnect_phy(bp->phylink); phy_power_off(bp->sgmii_phy); spin_lock_irqsave(&bp->lock, flags); macb_reset_hw(bp); netif_carrier_off(dev); spin_unlock_irqrestore(&bp->lock, flags); macb_free_consistent(bp); if (bp->ptp_info) bp->ptp_info->ptp_remove(dev); pm_runtime_put(&bp->pdev->dev); return 0; } static int macb_change_mtu(struct net_device *dev, int new_mtu) { if (netif_running(dev)) return -EBUSY; dev->mtu = new_mtu; return 0; } static void gem_update_stats(struct macb *bp) { struct macb_queue *queue; unsigned int i, q, idx; unsigned long *stat; u32 *p = &bp->hw_stats.gem.tx_octets_31_0; for (i = 0; i < GEM_STATS_LEN; ++i, ++p) { u32 offset = gem_statistics[i].offset; u64 val = bp->macb_reg_readl(bp, offset); bp->ethtool_stats[i] += val; *p += val; if (offset == GEM_OCTTXL || offset == GEM_OCTRXL) { /* Add GEM_OCTTXH, GEM_OCTRXH */ val = bp->macb_reg_readl(bp, offset + 4); bp->ethtool_stats[i] += ((u64)val) << 32; *(++p) += val; } } idx = GEM_STATS_LEN; for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) for (i = 0, stat = &queue->stats.first; i < QUEUE_STATS_LEN; ++i, ++stat) bp->ethtool_stats[idx++] = *stat; } static struct net_device_stats *gem_get_stats(struct macb *bp) { struct gem_stats *hwstat = &bp->hw_stats.gem; struct net_device_stats *nstat = &bp->dev->stats; if (!netif_running(bp->dev)) return nstat; gem_update_stats(bp); nstat->rx_errors = (hwstat->rx_frame_check_sequence_errors + hwstat->rx_alignment_errors + hwstat->rx_resource_errors + hwstat->rx_overruns + hwstat->rx_oversize_frames + hwstat->rx_jabbers + hwstat->rx_undersized_frames + hwstat->rx_length_field_frame_errors); nstat->tx_errors = (hwstat->tx_late_collisions + hwstat->tx_excessive_collisions + hwstat->tx_underrun + hwstat->tx_carrier_sense_errors); nstat->multicast = hwstat->rx_multicast_frames; nstat->collisions = (hwstat->tx_single_collision_frames + hwstat->tx_multiple_collision_frames + hwstat->tx_excessive_collisions); nstat->rx_length_errors = (hwstat->rx_oversize_frames + hwstat->rx_jabbers + hwstat->rx_undersized_frames + hwstat->rx_length_field_frame_errors); nstat->rx_over_errors = hwstat->rx_resource_errors; nstat->rx_crc_errors = hwstat->rx_frame_check_sequence_errors; nstat->rx_frame_errors = hwstat->rx_alignment_errors; nstat->rx_fifo_errors = hwstat->rx_overruns; nstat->tx_aborted_errors = hwstat->tx_excessive_collisions; nstat->tx_carrier_errors = hwstat->tx_carrier_sense_errors; nstat->tx_fifo_errors = hwstat->tx_underrun; return nstat; } static void gem_get_ethtool_stats(struct net_device *dev, struct ethtool_stats *stats, u64 *data) { struct macb *bp; bp = netdev_priv(dev); gem_update_stats(bp); memcpy(data, &bp->ethtool_stats, sizeof(u64) * (GEM_STATS_LEN + QUEUE_STATS_LEN * MACB_MAX_QUEUES)); } static int gem_get_sset_count(struct net_device *dev, int sset) { struct macb *bp = netdev_priv(dev); switch (sset) { case ETH_SS_STATS: return GEM_STATS_LEN + bp->num_queues * QUEUE_STATS_LEN; default: return -EOPNOTSUPP; } } static void gem_get_ethtool_strings(struct net_device *dev, u32 sset, u8 *p) { char stat_string[ETH_GSTRING_LEN]; struct macb *bp = netdev_priv(dev); struct macb_queue *queue; unsigned int i; unsigned int q; switch (sset) { case ETH_SS_STATS: for (i = 0; i < GEM_STATS_LEN; i++, p += ETH_GSTRING_LEN) memcpy(p, gem_statistics[i].stat_string, ETH_GSTRING_LEN); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { for (i = 0; i < QUEUE_STATS_LEN; i++, p += ETH_GSTRING_LEN) { snprintf(stat_string, ETH_GSTRING_LEN, "q%d_%s", q, queue_statistics[i].stat_string); memcpy(p, stat_string, ETH_GSTRING_LEN); } } break; } } static struct net_device_stats *macb_get_stats(struct net_device *dev) { struct macb *bp = netdev_priv(dev); struct net_device_stats *nstat = &bp->dev->stats; struct macb_stats *hwstat = &bp->hw_stats.macb; if (macb_is_gem(bp)) return gem_get_stats(bp); /* read stats from hardware */ macb_update_stats(bp); /* Convert HW stats into netdevice stats */ nstat->rx_errors = (hwstat->rx_fcs_errors + hwstat->rx_align_errors + hwstat->rx_resource_errors + hwstat->rx_overruns + hwstat->rx_oversize_pkts + hwstat->rx_jabbers + hwstat->rx_undersize_pkts + hwstat->rx_length_mismatch); nstat->tx_errors = (hwstat->tx_late_cols + hwstat->tx_excessive_cols + hwstat->tx_underruns + hwstat->tx_carrier_errors + hwstat->sqe_test_errors); nstat->collisions = (hwstat->tx_single_cols + hwstat->tx_multiple_cols + hwstat->tx_excessive_cols); nstat->rx_length_errors = (hwstat->rx_oversize_pkts + hwstat->rx_jabbers + hwstat->rx_undersize_pkts + hwstat->rx_length_mismatch); nstat->rx_over_errors = hwstat->rx_resource_errors + hwstat->rx_overruns; nstat->rx_crc_errors = hwstat->rx_fcs_errors; nstat->rx_frame_errors = hwstat->rx_align_errors; nstat->rx_fifo_errors = hwstat->rx_overruns; /* XXX: What does "missed" mean? */ nstat->tx_aborted_errors = hwstat->tx_excessive_cols; nstat->tx_carrier_errors = hwstat->tx_carrier_errors; nstat->tx_fifo_errors = hwstat->tx_underruns; /* Don't know about heartbeat or window errors... */ return nstat; } static int macb_get_regs_len(struct net_device *netdev) { return MACB_GREGS_NBR * sizeof(u32); } static void macb_get_regs(struct net_device *dev, struct ethtool_regs *regs, void *p) { struct macb *bp = netdev_priv(dev); unsigned int tail, head; u32 *regs_buff = p; regs->version = (macb_readl(bp, MID) & ((1 << MACB_REV_SIZE) - 1)) | MACB_GREGS_VERSION; tail = macb_tx_ring_wrap(bp, bp->queues[0].tx_tail); head = macb_tx_ring_wrap(bp, bp->queues[0].tx_head); regs_buff[0] = macb_readl(bp, NCR); regs_buff[1] = macb_or_gem_readl(bp, NCFGR); regs_buff[2] = macb_readl(bp, NSR); regs_buff[3] = macb_readl(bp, TSR); regs_buff[4] = macb_readl(bp, RBQP); regs_buff[5] = macb_readl(bp, TBQP); regs_buff[6] = macb_readl(bp, RSR); regs_buff[7] = macb_readl(bp, IMR); regs_buff[8] = tail; regs_buff[9] = head; regs_buff[10] = macb_tx_dma(&bp->queues[0], tail); regs_buff[11] = macb_tx_dma(&bp->queues[0], head); if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) regs_buff[12] = macb_or_gem_readl(bp, USRIO); if (macb_is_gem(bp)) regs_buff[13] = gem_readl(bp, DMACFG); } static void macb_get_wol(struct net_device *netdev, struct ethtool_wolinfo *wol) { struct macb *bp = netdev_priv(netdev); if (bp->wol & MACB_WOL_HAS_MAGIC_PACKET) { phylink_ethtool_get_wol(bp->phylink, wol); wol->supported |= WAKE_MAGIC; if (bp->wol & MACB_WOL_ENABLED) wol->wolopts |= WAKE_MAGIC; } } static int macb_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol) { struct macb *bp = netdev_priv(netdev); int ret; /* Pass the order to phylink layer */ ret = phylink_ethtool_set_wol(bp->phylink, wol); /* Don't manage WoL on MAC if handled by the PHY * or if there's a failure in talking to the PHY */ if (!ret || ret != -EOPNOTSUPP) return ret; if (!(bp->wol & MACB_WOL_HAS_MAGIC_PACKET) || (wol->wolopts & ~WAKE_MAGIC)) return -EOPNOTSUPP; if (wol->wolopts & WAKE_MAGIC) bp->wol |= MACB_WOL_ENABLED; else bp->wol &= ~MACB_WOL_ENABLED; device_set_wakeup_enable(&bp->pdev->dev, bp->wol & MACB_WOL_ENABLED); return 0; } static int macb_get_link_ksettings(struct net_device *netdev, struct ethtool_link_ksettings *kset) { struct macb *bp = netdev_priv(netdev); return phylink_ethtool_ksettings_get(bp->phylink, kset); } static int macb_set_link_ksettings(struct net_device *netdev, const struct ethtool_link_ksettings *kset) { struct macb *bp = netdev_priv(netdev); return phylink_ethtool_ksettings_set(bp->phylink, kset); } static void macb_get_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring, struct kernel_ethtool_ringparam *kernel_ring, struct netlink_ext_ack *extack) { struct macb *bp = netdev_priv(netdev); ring->rx_max_pending = MAX_RX_RING_SIZE; ring->tx_max_pending = MAX_TX_RING_SIZE; ring->rx_pending = bp->rx_ring_size; ring->tx_pending = bp->tx_ring_size; } static int macb_set_ringparam(struct net_device *netdev, struct ethtool_ringparam *ring, struct kernel_ethtool_ringparam *kernel_ring, struct netlink_ext_ack *extack) { struct macb *bp = netdev_priv(netdev); u32 new_rx_size, new_tx_size; unsigned int reset = 0; if ((ring->rx_mini_pending) || (ring->rx_jumbo_pending)) return -EINVAL; new_rx_size = clamp_t(u32, ring->rx_pending, MIN_RX_RING_SIZE, MAX_RX_RING_SIZE); new_rx_size = roundup_pow_of_two(new_rx_size); new_tx_size = clamp_t(u32, ring->tx_pending, MIN_TX_RING_SIZE, MAX_TX_RING_SIZE); new_tx_size = roundup_pow_of_two(new_tx_size); if ((new_tx_size == bp->tx_ring_size) && (new_rx_size == bp->rx_ring_size)) { /* nothing to do */ return 0; } if (netif_running(bp->dev)) { reset = 1; macb_close(bp->dev); } bp->rx_ring_size = new_rx_size; bp->tx_ring_size = new_tx_size; if (reset) macb_open(bp->dev); return 0; } #ifdef CONFIG_MACB_USE_HWSTAMP static unsigned int gem_get_tsu_rate(struct macb *bp) { struct clk *tsu_clk; unsigned int tsu_rate; tsu_clk = devm_clk_get(&bp->pdev->dev, "tsu_clk"); if (!IS_ERR(tsu_clk)) tsu_rate = clk_get_rate(tsu_clk); /* try pclk instead */ else if (!IS_ERR(bp->pclk)) { tsu_clk = bp->pclk; tsu_rate = clk_get_rate(tsu_clk); } else return -ENOTSUPP; return tsu_rate; } static s32 gem_get_ptp_max_adj(void) { return 64000000; } static int gem_get_ts_info(struct net_device *dev, struct ethtool_ts_info *info) { struct macb *bp = netdev_priv(dev); if ((bp->hw_dma_cap & HW_DMA_CAP_PTP) == 0) { ethtool_op_get_ts_info(dev, info); return 0; } info->so_timestamping = SOF_TIMESTAMPING_TX_SOFTWARE | SOF_TIMESTAMPING_RX_SOFTWARE | SOF_TIMESTAMPING_SOFTWARE | SOF_TIMESTAMPING_TX_HARDWARE | SOF_TIMESTAMPING_RX_HARDWARE | SOF_TIMESTAMPING_RAW_HARDWARE; info->tx_types = (1 << HWTSTAMP_TX_ONESTEP_SYNC) | (1 << HWTSTAMP_TX_OFF) | (1 << HWTSTAMP_TX_ON); info->rx_filters = (1 << HWTSTAMP_FILTER_NONE) | (1 << HWTSTAMP_FILTER_ALL); info->phc_index = bp->ptp_clock ? ptp_clock_index(bp->ptp_clock) : -1; return 0; } static struct macb_ptp_info gem_ptp_info = { .ptp_init = gem_ptp_init, .ptp_remove = gem_ptp_remove, .get_ptp_max_adj = gem_get_ptp_max_adj, .get_tsu_rate = gem_get_tsu_rate, .get_ts_info = gem_get_ts_info, .get_hwtst = gem_get_hwtst, .set_hwtst = gem_set_hwtst, }; #endif static int macb_get_ts_info(struct net_device *netdev, struct ethtool_ts_info *info) { struct macb *bp = netdev_priv(netdev); if (bp->ptp_info) return bp->ptp_info->get_ts_info(netdev, info); return ethtool_op_get_ts_info(netdev, info); } static void gem_enable_flow_filters(struct macb *bp, bool enable) { struct net_device *netdev = bp->dev; struct ethtool_rx_fs_item *item; u32 t2_scr; int num_t2_scr; if (!(netdev->features & NETIF_F_NTUPLE)) return; num_t2_scr = GEM_BFEXT(T2SCR, gem_readl(bp, DCFG8)); list_for_each_entry(item, &bp->rx_fs_list.list, list) { struct ethtool_rx_flow_spec *fs = &item->fs; struct ethtool_tcpip4_spec *tp4sp_m; if (fs->location >= num_t2_scr) continue; t2_scr = gem_readl_n(bp, SCRT2, fs->location); /* enable/disable screener regs for the flow entry */ t2_scr = GEM_BFINS(ETHTEN, enable, t2_scr); /* only enable fields with no masking */ tp4sp_m = &(fs->m_u.tcp_ip4_spec); if (enable && (tp4sp_m->ip4src == 0xFFFFFFFF)) t2_scr = GEM_BFINS(CMPAEN, 1, t2_scr); else t2_scr = GEM_BFINS(CMPAEN, 0, t2_scr); if (enable && (tp4sp_m->ip4dst == 0xFFFFFFFF)) t2_scr = GEM_BFINS(CMPBEN, 1, t2_scr); else t2_scr = GEM_BFINS(CMPBEN, 0, t2_scr); if (enable && ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF))) t2_scr = GEM_BFINS(CMPCEN, 1, t2_scr); else t2_scr = GEM_BFINS(CMPCEN, 0, t2_scr); gem_writel_n(bp, SCRT2, fs->location, t2_scr); } } static void gem_prog_cmp_regs(struct macb *bp, struct ethtool_rx_flow_spec *fs) { struct ethtool_tcpip4_spec *tp4sp_v, *tp4sp_m; uint16_t index = fs->location; u32 w0, w1, t2_scr; bool cmp_a = false; bool cmp_b = false; bool cmp_c = false; if (!macb_is_gem(bp)) return; tp4sp_v = &(fs->h_u.tcp_ip4_spec); tp4sp_m = &(fs->m_u.tcp_ip4_spec); /* ignore field if any masking set */ if (tp4sp_m->ip4src == 0xFFFFFFFF) { /* 1st compare reg - IP source address */ w0 = 0; w1 = 0; w0 = tp4sp_v->ip4src; w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */ w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1); w1 = GEM_BFINS(T2OFST, ETYPE_SRCIP_OFFSET, w1); gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w0); gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4SRC_CMP(index)), w1); cmp_a = true; } /* ignore field if any masking set */ if (tp4sp_m->ip4dst == 0xFFFFFFFF) { /* 2nd compare reg - IP destination address */ w0 = 0; w1 = 0; w0 = tp4sp_v->ip4dst; w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */ w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_ETYPE, w1); w1 = GEM_BFINS(T2OFST, ETYPE_DSTIP_OFFSET, w1); gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_IP4DST_CMP(index)), w0); gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_IP4DST_CMP(index)), w1); cmp_b = true; } /* ignore both port fields if masking set in both */ if ((tp4sp_m->psrc == 0xFFFF) || (tp4sp_m->pdst == 0xFFFF)) { /* 3rd compare reg - source port, destination port */ w0 = 0; w1 = 0; w1 = GEM_BFINS(T2CMPOFST, GEM_T2COMPOFST_IPHDR, w1); if (tp4sp_m->psrc == tp4sp_m->pdst) { w0 = GEM_BFINS(T2MASK, tp4sp_v->psrc, w0); w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0); w1 = GEM_BFINS(T2DISMSK, 1, w1); /* 32-bit compare */ w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1); } else { /* only one port definition */ w1 = GEM_BFINS(T2DISMSK, 0, w1); /* 16-bit compare */ w0 = GEM_BFINS(T2MASK, 0xFFFF, w0); if (tp4sp_m->psrc == 0xFFFF) { /* src port */ w0 = GEM_BFINS(T2CMP, tp4sp_v->psrc, w0); w1 = GEM_BFINS(T2OFST, IPHDR_SRCPORT_OFFSET, w1); } else { /* dst port */ w0 = GEM_BFINS(T2CMP, tp4sp_v->pdst, w0); w1 = GEM_BFINS(T2OFST, IPHDR_DSTPORT_OFFSET, w1); } } gem_writel_n(bp, T2CMPW0, T2CMP_OFST(GEM_PORT_CMP(index)), w0); gem_writel_n(bp, T2CMPW1, T2CMP_OFST(GEM_PORT_CMP(index)), w1); cmp_c = true; } t2_scr = 0; t2_scr = GEM_BFINS(QUEUE, (fs->ring_cookie) & 0xFF, t2_scr); t2_scr = GEM_BFINS(ETHT2IDX, SCRT2_ETHT, t2_scr); if (cmp_a) t2_scr = GEM_BFINS(CMPA, GEM_IP4SRC_CMP(index), t2_scr); if (cmp_b) t2_scr = GEM_BFINS(CMPB, GEM_IP4DST_CMP(index), t2_scr); if (cmp_c) t2_scr = GEM_BFINS(CMPC, GEM_PORT_CMP(index), t2_scr); gem_writel_n(bp, SCRT2, index, t2_scr); } static int gem_add_flow_filter(struct net_device *netdev, struct ethtool_rxnfc *cmd) { struct macb *bp = netdev_priv(netdev); struct ethtool_rx_flow_spec *fs = &cmd->fs; struct ethtool_rx_fs_item *item, *newfs; unsigned long flags; int ret = -EINVAL; bool added = false; newfs = kmalloc(sizeof(*newfs), GFP_KERNEL); if (newfs == NULL) return -ENOMEM; memcpy(&newfs->fs, fs, sizeof(newfs->fs)); netdev_dbg(netdev, "Adding flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n", fs->flow_type, (int)fs->ring_cookie, fs->location, htonl(fs->h_u.tcp_ip4_spec.ip4src), htonl(fs->h_u.tcp_ip4_spec.ip4dst), be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc), be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst)); spin_lock_irqsave(&bp->rx_fs_lock, flags); /* find correct place to add in list */ list_for_each_entry(item, &bp->rx_fs_list.list, list) { if (item->fs.location > newfs->fs.location) { list_add_tail(&newfs->list, &item->list); added = true; break; } else if (item->fs.location == fs->location) { netdev_err(netdev, "Rule not added: location %d not free!\n", fs->location); ret = -EBUSY; goto err; } } if (!added) list_add_tail(&newfs->list, &bp->rx_fs_list.list); gem_prog_cmp_regs(bp, fs); bp->rx_fs_list.count++; /* enable filtering if NTUPLE on */ gem_enable_flow_filters(bp, 1); spin_unlock_irqrestore(&bp->rx_fs_lock, flags); return 0; err: spin_unlock_irqrestore(&bp->rx_fs_lock, flags); kfree(newfs); return ret; } static int gem_del_flow_filter(struct net_device *netdev, struct ethtool_rxnfc *cmd) { struct macb *bp = netdev_priv(netdev); struct ethtool_rx_fs_item *item; struct ethtool_rx_flow_spec *fs; unsigned long flags; spin_lock_irqsave(&bp->rx_fs_lock, flags); list_for_each_entry(item, &bp->rx_fs_list.list, list) { if (item->fs.location == cmd->fs.location) { /* disable screener regs for the flow entry */ fs = &(item->fs); netdev_dbg(netdev, "Deleting flow filter entry,type=%u,queue=%u,loc=%u,src=%08X,dst=%08X,ps=%u,pd=%u\n", fs->flow_type, (int)fs->ring_cookie, fs->location, htonl(fs->h_u.tcp_ip4_spec.ip4src), htonl(fs->h_u.tcp_ip4_spec.ip4dst), be16_to_cpu(fs->h_u.tcp_ip4_spec.psrc), be16_to_cpu(fs->h_u.tcp_ip4_spec.pdst)); gem_writel_n(bp, SCRT2, fs->location, 0); list_del(&item->list); bp->rx_fs_list.count--; spin_unlock_irqrestore(&bp->rx_fs_lock, flags); kfree(item); return 0; } } spin_unlock_irqrestore(&bp->rx_fs_lock, flags); return -EINVAL; } static int gem_get_flow_entry(struct net_device *netdev, struct ethtool_rxnfc *cmd) { struct macb *bp = netdev_priv(netdev); struct ethtool_rx_fs_item *item; list_for_each_entry(item, &bp->rx_fs_list.list, list) { if (item->fs.location == cmd->fs.location) { memcpy(&cmd->fs, &item->fs, sizeof(cmd->fs)); return 0; } } return -EINVAL; } static int gem_get_all_flow_entries(struct net_device *netdev, struct ethtool_rxnfc *cmd, u32 *rule_locs) { struct macb *bp = netdev_priv(netdev); struct ethtool_rx_fs_item *item; uint32_t cnt = 0; list_for_each_entry(item, &bp->rx_fs_list.list, list) { if (cnt == cmd->rule_cnt) return -EMSGSIZE; rule_locs[cnt] = item->fs.location; cnt++; } cmd->data = bp->max_tuples; cmd->rule_cnt = cnt; return 0; } static int gem_get_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd, u32 *rule_locs) { struct macb *bp = netdev_priv(netdev); int ret = 0; switch (cmd->cmd) { case ETHTOOL_GRXRINGS: cmd->data = bp->num_queues; break; case ETHTOOL_GRXCLSRLCNT: cmd->rule_cnt = bp->rx_fs_list.count; break; case ETHTOOL_GRXCLSRULE: ret = gem_get_flow_entry(netdev, cmd); break; case ETHTOOL_GRXCLSRLALL: ret = gem_get_all_flow_entries(netdev, cmd, rule_locs); break; default: netdev_err(netdev, "Command parameter %d is not supported\n", cmd->cmd); ret = -EOPNOTSUPP; } return ret; } static int gem_set_rxnfc(struct net_device *netdev, struct ethtool_rxnfc *cmd) { struct macb *bp = netdev_priv(netdev); int ret; switch (cmd->cmd) { case ETHTOOL_SRXCLSRLINS: if ((cmd->fs.location >= bp->max_tuples) || (cmd->fs.ring_cookie >= bp->num_queues)) { ret = -EINVAL; break; } ret = gem_add_flow_filter(netdev, cmd); break; case ETHTOOL_SRXCLSRLDEL: ret = gem_del_flow_filter(netdev, cmd); break; default: netdev_err(netdev, "Command parameter %d is not supported\n", cmd->cmd); ret = -EOPNOTSUPP; } return ret; } static const struct ethtool_ops macb_ethtool_ops = { .get_regs_len = macb_get_regs_len, .get_regs = macb_get_regs, .get_link = ethtool_op_get_link, .get_ts_info = ethtool_op_get_ts_info, .get_wol = macb_get_wol, .set_wol = macb_set_wol, .get_link_ksettings = macb_get_link_ksettings, .set_link_ksettings = macb_set_link_ksettings, .get_ringparam = macb_get_ringparam, .set_ringparam = macb_set_ringparam, }; static const struct ethtool_ops gem_ethtool_ops = { .get_regs_len = macb_get_regs_len, .get_regs = macb_get_regs, .get_wol = macb_get_wol, .set_wol = macb_set_wol, .get_link = ethtool_op_get_link, .get_ts_info = macb_get_ts_info, .get_ethtool_stats = gem_get_ethtool_stats, .get_strings = gem_get_ethtool_strings, .get_sset_count = gem_get_sset_count, .get_link_ksettings = macb_get_link_ksettings, .set_link_ksettings = macb_set_link_ksettings, .get_ringparam = macb_get_ringparam, .set_ringparam = macb_set_ringparam, .get_rxnfc = gem_get_rxnfc, .set_rxnfc = gem_set_rxnfc, }; static int macb_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { struct macb *bp = netdev_priv(dev); if (!netif_running(dev)) return -EINVAL; if (bp->ptp_info) { switch (cmd) { case SIOCSHWTSTAMP: return bp->ptp_info->set_hwtst(dev, rq, cmd); case SIOCGHWTSTAMP: return bp->ptp_info->get_hwtst(dev, rq); } } return phylink_mii_ioctl(bp->phylink, rq, cmd); } static inline void macb_set_txcsum_feature(struct macb *bp, netdev_features_t features) { u32 val; if (!macb_is_gem(bp)) return; val = gem_readl(bp, DMACFG); if (features & NETIF_F_HW_CSUM) val |= GEM_BIT(TXCOEN); else val &= ~GEM_BIT(TXCOEN); gem_writel(bp, DMACFG, val); } static inline void macb_set_rxcsum_feature(struct macb *bp, netdev_features_t features) { struct net_device *netdev = bp->dev; u32 val; if (!macb_is_gem(bp)) return; val = gem_readl(bp, NCFGR); if ((features & NETIF_F_RXCSUM) && !(netdev->flags & IFF_PROMISC)) val |= GEM_BIT(RXCOEN); else val &= ~GEM_BIT(RXCOEN); gem_writel(bp, NCFGR, val); } static inline void macb_set_rxflow_feature(struct macb *bp, netdev_features_t features) { if (!macb_is_gem(bp)) return; gem_enable_flow_filters(bp, !!(features & NETIF_F_NTUPLE)); } static int macb_set_features(struct net_device *netdev, netdev_features_t features) { struct macb *bp = netdev_priv(netdev); netdev_features_t changed = features ^ netdev->features; /* TX checksum offload */ if (changed & NETIF_F_HW_CSUM) macb_set_txcsum_feature(bp, features); /* RX checksum offload */ if (changed & NETIF_F_RXCSUM) macb_set_rxcsum_feature(bp, features); /* RX Flow Filters */ if (changed & NETIF_F_NTUPLE) macb_set_rxflow_feature(bp, features); return 0; } static void macb_restore_features(struct macb *bp) { struct net_device *netdev = bp->dev; netdev_features_t features = netdev->features; struct ethtool_rx_fs_item *item; /* TX checksum offload */ macb_set_txcsum_feature(bp, features); /* RX checksum offload */ macb_set_rxcsum_feature(bp, features); /* RX Flow Filters */ list_for_each_entry(item, &bp->rx_fs_list.list, list) gem_prog_cmp_regs(bp, &item->fs); macb_set_rxflow_feature(bp, features); } static const struct net_device_ops macb_netdev_ops = { .ndo_open = macb_open, .ndo_stop = macb_close, .ndo_start_xmit = macb_start_xmit, .ndo_set_rx_mode = macb_set_rx_mode, .ndo_get_stats = macb_get_stats, .ndo_eth_ioctl = macb_ioctl, .ndo_validate_addr = eth_validate_addr, .ndo_change_mtu = macb_change_mtu, .ndo_set_mac_address = eth_mac_addr, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = macb_poll_controller, #endif .ndo_set_features = macb_set_features, .ndo_features_check = macb_features_check, }; /* Configure peripheral capabilities according to device tree * and integration options used */ static void macb_configure_caps(struct macb *bp, const struct macb_config *dt_conf) { u32 dcfg; if (dt_conf) bp->caps = dt_conf->caps; if (hw_is_gem(bp->regs, bp->native_io)) { bp->caps |= MACB_CAPS_MACB_IS_GEM; dcfg = gem_readl(bp, DCFG1); if (GEM_BFEXT(IRQCOR, dcfg) == 0) bp->caps |= MACB_CAPS_ISR_CLEAR_ON_WRITE; if (GEM_BFEXT(NO_PCS, dcfg) == 0) bp->caps |= MACB_CAPS_PCS; dcfg = gem_readl(bp, DCFG12); if (GEM_BFEXT(HIGH_SPEED, dcfg) == 1) bp->caps |= MACB_CAPS_HIGH_SPEED; dcfg = gem_readl(bp, DCFG2); if ((dcfg & (GEM_BIT(RX_PKT_BUFF) | GEM_BIT(TX_PKT_BUFF))) == 0) bp->caps |= MACB_CAPS_FIFO_MODE; #ifdef CONFIG_MACB_USE_HWSTAMP if (gem_has_ptp(bp)) { if (!GEM_BFEXT(TSU, gem_readl(bp, DCFG5))) dev_err(&bp->pdev->dev, "GEM doesn't support hardware ptp.\n"); else { bp->hw_dma_cap |= HW_DMA_CAP_PTP; bp->ptp_info = &gem_ptp_info; } } #endif } dev_dbg(&bp->pdev->dev, "Cadence caps 0x%08x\n", bp->caps); } static void macb_probe_queues(void __iomem *mem, bool native_io, unsigned int *queue_mask, unsigned int *num_queues) { *queue_mask = 0x1; *num_queues = 1; /* is it macb or gem ? * * We need to read directly from the hardware here because * we are early in the probe process and don't have the * MACB_CAPS_MACB_IS_GEM flag positioned */ if (!hw_is_gem(mem, native_io)) return; /* bit 0 is never set but queue 0 always exists */ *queue_mask |= readl_relaxed(mem + GEM_DCFG6) & 0xff; *num_queues = hweight32(*queue_mask); } static void macb_clks_disable(struct clk *pclk, struct clk *hclk, struct clk *tx_clk, struct clk *rx_clk, struct clk *tsu_clk) { struct clk_bulk_data clks[] = { { .clk = tsu_clk, }, { .clk = rx_clk, }, { .clk = pclk, }, { .clk = hclk, }, { .clk = tx_clk }, }; clk_bulk_disable_unprepare(ARRAY_SIZE(clks), clks); } static int macb_clk_init(struct platform_device *pdev, struct clk **pclk, struct clk **hclk, struct clk **tx_clk, struct clk **rx_clk, struct clk **tsu_clk) { struct macb_platform_data *pdata; int err; pdata = dev_get_platdata(&pdev->dev); if (pdata) { *pclk = pdata->pclk; *hclk = pdata->hclk; } else { *pclk = devm_clk_get(&pdev->dev, "pclk"); *hclk = devm_clk_get(&pdev->dev, "hclk"); } if (IS_ERR_OR_NULL(*pclk)) return dev_err_probe(&pdev->dev, IS_ERR(*pclk) ? PTR_ERR(*pclk) : -ENODEV, "failed to get pclk\n"); if (IS_ERR_OR_NULL(*hclk)) return dev_err_probe(&pdev->dev, IS_ERR(*hclk) ? PTR_ERR(*hclk) : -ENODEV, "failed to get hclk\n"); *tx_clk = devm_clk_get_optional(&pdev->dev, "tx_clk"); if (IS_ERR(*tx_clk)) return PTR_ERR(*tx_clk); *rx_clk = devm_clk_get_optional(&pdev->dev, "rx_clk"); if (IS_ERR(*rx_clk)) return PTR_ERR(*rx_clk); *tsu_clk = devm_clk_get_optional(&pdev->dev, "tsu_clk"); if (IS_ERR(*tsu_clk)) return PTR_ERR(*tsu_clk); err = clk_prepare_enable(*pclk); if (err) { dev_err(&pdev->dev, "failed to enable pclk (%d)\n", err); return err; } err = clk_prepare_enable(*hclk); if (err) { dev_err(&pdev->dev, "failed to enable hclk (%d)\n", err); goto err_disable_pclk; } err = clk_prepare_enable(*tx_clk); if (err) { dev_err(&pdev->dev, "failed to enable tx_clk (%d)\n", err); goto err_disable_hclk; } err = clk_prepare_enable(*rx_clk); if (err) { dev_err(&pdev->dev, "failed to enable rx_clk (%d)\n", err); goto err_disable_txclk; } err = clk_prepare_enable(*tsu_clk); if (err) { dev_err(&pdev->dev, "failed to enable tsu_clk (%d)\n", err); goto err_disable_rxclk; } return 0; err_disable_rxclk: clk_disable_unprepare(*rx_clk); err_disable_txclk: clk_disable_unprepare(*tx_clk); err_disable_hclk: clk_disable_unprepare(*hclk); err_disable_pclk: clk_disable_unprepare(*pclk); return err; } static int macb_init(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); unsigned int hw_q, q; struct macb *bp = netdev_priv(dev); struct macb_queue *queue; int err; u32 val, reg; bp->tx_ring_size = DEFAULT_TX_RING_SIZE; bp->rx_ring_size = DEFAULT_RX_RING_SIZE; /* set the queue register mapping once for all: queue0 has a special * register mapping but we don't want to test the queue index then * compute the corresponding register offset at run time. */ for (hw_q = 0, q = 0; hw_q < MACB_MAX_QUEUES; ++hw_q) { if (!(bp->queue_mask & (1 << hw_q))) continue; queue = &bp->queues[q]; queue->bp = bp; spin_lock_init(&queue->tx_ptr_lock); netif_napi_add(dev, &queue->napi_rx, macb_rx_poll); netif_napi_add(dev, &queue->napi_tx, macb_tx_poll); if (hw_q) { queue->ISR = GEM_ISR(hw_q - 1); queue->IER = GEM_IER(hw_q - 1); queue->IDR = GEM_IDR(hw_q - 1); queue->IMR = GEM_IMR(hw_q - 1); queue->TBQP = GEM_TBQP(hw_q - 1); queue->RBQP = GEM_RBQP(hw_q - 1); queue->RBQS = GEM_RBQS(hw_q - 1); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (bp->hw_dma_cap & HW_DMA_CAP_64B) { queue->TBQPH = GEM_TBQPH(hw_q - 1); queue->RBQPH = GEM_RBQPH(hw_q - 1); } #endif } else { /* queue0 uses legacy registers */ queue->ISR = MACB_ISR; queue->IER = MACB_IER; queue->IDR = MACB_IDR; queue->IMR = MACB_IMR; queue->TBQP = MACB_TBQP; queue->RBQP = MACB_RBQP; #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (bp->hw_dma_cap & HW_DMA_CAP_64B) { queue->TBQPH = MACB_TBQPH; queue->RBQPH = MACB_RBQPH; } #endif } /* get irq: here we use the linux queue index, not the hardware * queue index. the queue irq definitions in the device tree * must remove the optional gaps that could exist in the * hardware queue mask. */ queue->irq = platform_get_irq(pdev, q); err = devm_request_irq(&pdev->dev, queue->irq, macb_interrupt, IRQF_SHARED, dev->name, queue); if (err) { dev_err(&pdev->dev, "Unable to request IRQ %d (error %d)\n", queue->irq, err); return err; } INIT_WORK(&queue->tx_error_task, macb_tx_error_task); q++; } dev->netdev_ops = &macb_netdev_ops; /* setup appropriated routines according to adapter type */ if (macb_is_gem(bp)) { bp->max_tx_length = GEM_MAX_TX_LEN; bp->macbgem_ops.mog_alloc_rx_buffers = gem_alloc_rx_buffers; bp->macbgem_ops.mog_free_rx_buffers = gem_free_rx_buffers; bp->macbgem_ops.mog_init_rings = gem_init_rings; bp->macbgem_ops.mog_rx = gem_rx; dev->ethtool_ops = &gem_ethtool_ops; } else { bp->max_tx_length = MACB_MAX_TX_LEN; bp->macbgem_ops.mog_alloc_rx_buffers = macb_alloc_rx_buffers; bp->macbgem_ops.mog_free_rx_buffers = macb_free_rx_buffers; bp->macbgem_ops.mog_init_rings = macb_init_rings; bp->macbgem_ops.mog_rx = macb_rx; dev->ethtool_ops = &macb_ethtool_ops; } /* Set features */ dev->hw_features = NETIF_F_SG; /* Check LSO capability */ if (GEM_BFEXT(PBUF_LSO, gem_readl(bp, DCFG6))) dev->hw_features |= MACB_NETIF_LSO; /* Checksum offload is only available on gem with packet buffer */ if (macb_is_gem(bp) && !(bp->caps & MACB_CAPS_FIFO_MODE)) dev->hw_features |= NETIF_F_HW_CSUM | NETIF_F_RXCSUM; if (bp->caps & MACB_CAPS_SG_DISABLED) dev->hw_features &= ~NETIF_F_SG; dev->features = dev->hw_features; /* Check RX Flow Filters support. * Max Rx flows set by availability of screeners & compare regs: * each 4-tuple define requires 1 T2 screener reg + 3 compare regs */ reg = gem_readl(bp, DCFG8); bp->max_tuples = min((GEM_BFEXT(SCR2CMP, reg) / 3), GEM_BFEXT(T2SCR, reg)); INIT_LIST_HEAD(&bp->rx_fs_list.list); if (bp->max_tuples > 0) { /* also needs one ethtype match to check IPv4 */ if (GEM_BFEXT(SCR2ETH, reg) > 0) { /* program this reg now */ reg = 0; reg = GEM_BFINS(ETHTCMP, (uint16_t)ETH_P_IP, reg); gem_writel_n(bp, ETHT, SCRT2_ETHT, reg); /* Filtering is supported in hw but don't enable it in kernel now */ dev->hw_features |= NETIF_F_NTUPLE; /* init Rx flow definitions */ bp->rx_fs_list.count = 0; spin_lock_init(&bp->rx_fs_lock); } else bp->max_tuples = 0; } if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) { val = 0; if (phy_interface_mode_is_rgmii(bp->phy_interface)) val = bp->usrio->rgmii; else if (bp->phy_interface == PHY_INTERFACE_MODE_RMII && (bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII)) val = bp->usrio->rmii; else if (!(bp->caps & MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII)) val = bp->usrio->mii; if (bp->caps & MACB_CAPS_USRIO_HAS_CLKEN) val |= bp->usrio->refclk; macb_or_gem_writel(bp, USRIO, val); } /* Set MII management clock divider */ val = macb_mdc_clk_div(bp); val |= macb_dbw(bp); if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) val |= GEM_BIT(SGMIIEN) | GEM_BIT(PCSSEL); macb_writel(bp, NCFGR, val); return 0; } static const struct macb_usrio_config macb_default_usrio = { .mii = MACB_BIT(MII), .rmii = MACB_BIT(RMII), .rgmii = GEM_BIT(RGMII), .refclk = MACB_BIT(CLKEN), }; #if defined(CONFIG_OF) /* 1518 rounded up */ #define AT91ETHER_MAX_RBUFF_SZ 0x600 /* max number of receive buffers */ #define AT91ETHER_MAX_RX_DESCR 9 static struct sifive_fu540_macb_mgmt *mgmt; static int at91ether_alloc_coherent(struct macb *lp) { struct macb_queue *q = &lp->queues[0]; q->rx_ring = dma_alloc_coherent(&lp->pdev->dev, (AT91ETHER_MAX_RX_DESCR * macb_dma_desc_get_size(lp)), &q->rx_ring_dma, GFP_KERNEL); if (!q->rx_ring) return -ENOMEM; q->rx_buffers = dma_alloc_coherent(&lp->pdev->dev, AT91ETHER_MAX_RX_DESCR * AT91ETHER_MAX_RBUFF_SZ, &q->rx_buffers_dma, GFP_KERNEL); if (!q->rx_buffers) { dma_free_coherent(&lp->pdev->dev, AT91ETHER_MAX_RX_DESCR * macb_dma_desc_get_size(lp), q->rx_ring, q->rx_ring_dma); q->rx_ring = NULL; return -ENOMEM; } return 0; } static void at91ether_free_coherent(struct macb *lp) { struct macb_queue *q = &lp->queues[0]; if (q->rx_ring) { dma_free_coherent(&lp->pdev->dev, AT91ETHER_MAX_RX_DESCR * macb_dma_desc_get_size(lp), q->rx_ring, q->rx_ring_dma); q->rx_ring = NULL; } if (q->rx_buffers) { dma_free_coherent(&lp->pdev->dev, AT91ETHER_MAX_RX_DESCR * AT91ETHER_MAX_RBUFF_SZ, q->rx_buffers, q->rx_buffers_dma); q->rx_buffers = NULL; } } /* Initialize and start the Receiver and Transmit subsystems */ static int at91ether_start(struct macb *lp) { struct macb_queue *q = &lp->queues[0]; struct macb_dma_desc *desc; dma_addr_t addr; u32 ctl; int i, ret; ret = at91ether_alloc_coherent(lp); if (ret) return ret; addr = q->rx_buffers_dma; for (i = 0; i < AT91ETHER_MAX_RX_DESCR; i++) { desc = macb_rx_desc(q, i); macb_set_addr(lp, desc, addr); desc->ctrl = 0; addr += AT91ETHER_MAX_RBUFF_SZ; } /* Set the Wrap bit on the last descriptor */ desc->addr |= MACB_BIT(RX_WRAP); /* Reset buffer index */ q->rx_tail = 0; /* Program address of descriptor list in Rx Buffer Queue register */ macb_writel(lp, RBQP, q->rx_ring_dma); /* Enable Receive and Transmit */ ctl = macb_readl(lp, NCR); macb_writel(lp, NCR, ctl | MACB_BIT(RE) | MACB_BIT(TE)); /* Enable MAC interrupts */ macb_writel(lp, IER, MACB_BIT(RCOMP) | MACB_BIT(RXUBR) | MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE) | MACB_BIT(TCOMP) | MACB_BIT(ISR_ROVR) | MACB_BIT(HRESP)); return 0; } static void at91ether_stop(struct macb *lp) { u32 ctl; /* Disable MAC interrupts */ macb_writel(lp, IDR, MACB_BIT(RCOMP) | MACB_BIT(RXUBR) | MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE) | MACB_BIT(TCOMP) | MACB_BIT(ISR_ROVR) | MACB_BIT(HRESP)); /* Disable Receiver and Transmitter */ ctl = macb_readl(lp, NCR); macb_writel(lp, NCR, ctl & ~(MACB_BIT(TE) | MACB_BIT(RE))); /* Free resources. */ at91ether_free_coherent(lp); } /* Open the ethernet interface */ static int at91ether_open(struct net_device *dev) { struct macb *lp = netdev_priv(dev); u32 ctl; int ret; ret = pm_runtime_resume_and_get(&lp->pdev->dev); if (ret < 0) return ret; /* Clear internal statistics */ ctl = macb_readl(lp, NCR); macb_writel(lp, NCR, ctl | MACB_BIT(CLRSTAT)); macb_set_hwaddr(lp); ret = at91ether_start(lp); if (ret) goto pm_exit; ret = macb_phylink_connect(lp); if (ret) goto stop; netif_start_queue(dev); return 0; stop: at91ether_stop(lp); pm_exit: pm_runtime_put_sync(&lp->pdev->dev); return ret; } /* Close the interface */ static int at91ether_close(struct net_device *dev) { struct macb *lp = netdev_priv(dev); netif_stop_queue(dev); phylink_stop(lp->phylink); phylink_disconnect_phy(lp->phylink); at91ether_stop(lp); return pm_runtime_put(&lp->pdev->dev); } /* Transmit packet */ static netdev_tx_t at91ether_start_xmit(struct sk_buff *skb, struct net_device *dev) { struct macb *lp = netdev_priv(dev); if (macb_readl(lp, TSR) & MACB_BIT(RM9200_BNQ)) { int desc = 0; netif_stop_queue(dev); /* Store packet information (to free when Tx completed) */ lp->rm9200_txq[desc].skb = skb; lp->rm9200_txq[desc].size = skb->len; lp->rm9200_txq[desc].mapping = dma_map_single(&lp->pdev->dev, skb->data, skb->len, DMA_TO_DEVICE); if (dma_mapping_error(&lp->pdev->dev, lp->rm9200_txq[desc].mapping)) { dev_kfree_skb_any(skb); dev->stats.tx_dropped++; netdev_err(dev, "%s: DMA mapping error\n", __func__); return NETDEV_TX_OK; } /* Set address of the data in the Transmit Address register */ macb_writel(lp, TAR, lp->rm9200_txq[desc].mapping); /* Set length of the packet in the Transmit Control register */ macb_writel(lp, TCR, skb->len); } else { netdev_err(dev, "%s called, but device is busy!\n", __func__); return NETDEV_TX_BUSY; } return NETDEV_TX_OK; } /* Extract received frame from buffer descriptors and sent to upper layers. * (Called from interrupt context) */ static void at91ether_rx(struct net_device *dev) { struct macb *lp = netdev_priv(dev); struct macb_queue *q = &lp->queues[0]; struct macb_dma_desc *desc; unsigned char *p_recv; struct sk_buff *skb; unsigned int pktlen; desc = macb_rx_desc(q, q->rx_tail); while (desc->addr & MACB_BIT(RX_USED)) { p_recv = q->rx_buffers + q->rx_tail * AT91ETHER_MAX_RBUFF_SZ; pktlen = MACB_BF(RX_FRMLEN, desc->ctrl); skb = netdev_alloc_skb(dev, pktlen + 2); if (skb) { skb_reserve(skb, 2); skb_put_data(skb, p_recv, pktlen); skb->protocol = eth_type_trans(skb, dev); dev->stats.rx_packets++; dev->stats.rx_bytes += pktlen; netif_rx(skb); } else { dev->stats.rx_dropped++; } if (desc->ctrl & MACB_BIT(RX_MHASH_MATCH)) dev->stats.multicast++; /* reset ownership bit */ desc->addr &= ~MACB_BIT(RX_USED); /* wrap after last buffer */ if (q->rx_tail == AT91ETHER_MAX_RX_DESCR - 1) q->rx_tail = 0; else q->rx_tail++; desc = macb_rx_desc(q, q->rx_tail); } } /* MAC interrupt handler */ static irqreturn_t at91ether_interrupt(int irq, void *dev_id) { struct net_device *dev = dev_id; struct macb *lp = netdev_priv(dev); u32 intstatus, ctl; unsigned int desc; /* MAC Interrupt Status register indicates what interrupts are pending. * It is automatically cleared once read. */ intstatus = macb_readl(lp, ISR); /* Receive complete */ if (intstatus & MACB_BIT(RCOMP)) at91ether_rx(dev); /* Transmit complete */ if (intstatus & MACB_BIT(TCOMP)) { /* The TCOM bit is set even if the transmission failed */ if (intstatus & (MACB_BIT(ISR_TUND) | MACB_BIT(ISR_RLE))) dev->stats.tx_errors++; desc = 0; if (lp->rm9200_txq[desc].skb) { dev_consume_skb_irq(lp->rm9200_txq[desc].skb); lp->rm9200_txq[desc].skb = NULL; dma_unmap_single(&lp->pdev->dev, lp->rm9200_txq[desc].mapping, lp->rm9200_txq[desc].size, DMA_TO_DEVICE); dev->stats.tx_packets++; dev->stats.tx_bytes += lp->rm9200_txq[desc].size; } netif_wake_queue(dev); } /* Work-around for EMAC Errata section 41.3.1 */ if (intstatus & MACB_BIT(RXUBR)) { ctl = macb_readl(lp, NCR); macb_writel(lp, NCR, ctl & ~MACB_BIT(RE)); wmb(); macb_writel(lp, NCR, ctl | MACB_BIT(RE)); } if (intstatus & MACB_BIT(ISR_ROVR)) netdev_err(dev, "ROVR error\n"); return IRQ_HANDLED; } #ifdef CONFIG_NET_POLL_CONTROLLER static void at91ether_poll_controller(struct net_device *dev) { unsigned long flags; local_irq_save(flags); at91ether_interrupt(dev->irq, dev); local_irq_restore(flags); } #endif static const struct net_device_ops at91ether_netdev_ops = { .ndo_open = at91ether_open, .ndo_stop = at91ether_close, .ndo_start_xmit = at91ether_start_xmit, .ndo_get_stats = macb_get_stats, .ndo_set_rx_mode = macb_set_rx_mode, .ndo_set_mac_address = eth_mac_addr, .ndo_eth_ioctl = macb_ioctl, .ndo_validate_addr = eth_validate_addr, #ifdef CONFIG_NET_POLL_CONTROLLER .ndo_poll_controller = at91ether_poll_controller, #endif }; static int at91ether_clk_init(struct platform_device *pdev, struct clk **pclk, struct clk **hclk, struct clk **tx_clk, struct clk **rx_clk, struct clk **tsu_clk) { int err; *hclk = NULL; *tx_clk = NULL; *rx_clk = NULL; *tsu_clk = NULL; *pclk = devm_clk_get(&pdev->dev, "ether_clk"); if (IS_ERR(*pclk)) return PTR_ERR(*pclk); err = clk_prepare_enable(*pclk); if (err) { dev_err(&pdev->dev, "failed to enable pclk (%d)\n", err); return err; } return 0; } static int at91ether_init(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); struct macb *bp = netdev_priv(dev); int err; bp->queues[0].bp = bp; dev->netdev_ops = &at91ether_netdev_ops; dev->ethtool_ops = &macb_ethtool_ops; err = devm_request_irq(&pdev->dev, dev->irq, at91ether_interrupt, 0, dev->name, dev); if (err) return err; macb_writel(bp, NCR, 0); macb_writel(bp, NCFGR, MACB_BF(CLK, MACB_CLK_DIV32) | MACB_BIT(BIG)); return 0; } static unsigned long fu540_macb_tx_recalc_rate(struct clk_hw *hw, unsigned long parent_rate) { return mgmt->rate; } static long fu540_macb_tx_round_rate(struct clk_hw *hw, unsigned long rate, unsigned long *parent_rate) { if (WARN_ON(rate < 2500000)) return 2500000; else if (rate == 2500000) return 2500000; else if (WARN_ON(rate < 13750000)) return 2500000; else if (WARN_ON(rate < 25000000)) return 25000000; else if (rate == 25000000) return 25000000; else if (WARN_ON(rate < 75000000)) return 25000000; else if (WARN_ON(rate < 125000000)) return 125000000; else if (rate == 125000000) return 125000000; WARN_ON(rate > 125000000); return 125000000; } static int fu540_macb_tx_set_rate(struct clk_hw *hw, unsigned long rate, unsigned long parent_rate) { rate = fu540_macb_tx_round_rate(hw, rate, &parent_rate); if (rate != 125000000) iowrite32(1, mgmt->reg); else iowrite32(0, mgmt->reg); mgmt->rate = rate; return 0; } static const struct clk_ops fu540_c000_ops = { .recalc_rate = fu540_macb_tx_recalc_rate, .round_rate = fu540_macb_tx_round_rate, .set_rate = fu540_macb_tx_set_rate, }; static int fu540_c000_clk_init(struct platform_device *pdev, struct clk **pclk, struct clk **hclk, struct clk **tx_clk, struct clk **rx_clk, struct clk **tsu_clk) { struct clk_init_data init; int err = 0; err = macb_clk_init(pdev, pclk, hclk, tx_clk, rx_clk, tsu_clk); if (err) return err; mgmt = devm_kzalloc(&pdev->dev, sizeof(*mgmt), GFP_KERNEL); if (!mgmt) { err = -ENOMEM; goto err_disable_clks; } init.name = "sifive-gemgxl-mgmt"; init.ops = &fu540_c000_ops; init.flags = 0; init.num_parents = 0; mgmt->rate = 0; mgmt->hw.init = &init; *tx_clk = devm_clk_register(&pdev->dev, &mgmt->hw); if (IS_ERR(*tx_clk)) { err = PTR_ERR(*tx_clk); goto err_disable_clks; } err = clk_prepare_enable(*tx_clk); if (err) { dev_err(&pdev->dev, "failed to enable tx_clk (%u)\n", err); *tx_clk = NULL; goto err_disable_clks; } else { dev_info(&pdev->dev, "Registered clk switch '%s'\n", init.name); } return 0; err_disable_clks: macb_clks_disable(*pclk, *hclk, *tx_clk, *rx_clk, *tsu_clk); return err; } static int fu540_c000_init(struct platform_device *pdev) { mgmt->reg = devm_platform_ioremap_resource(pdev, 1); if (IS_ERR(mgmt->reg)) return PTR_ERR(mgmt->reg); return macb_init(pdev); } static int init_reset_optional(struct platform_device *pdev) { struct net_device *dev = platform_get_drvdata(pdev); struct macb *bp = netdev_priv(dev); int ret; if (bp->phy_interface == PHY_INTERFACE_MODE_SGMII) { /* Ensure PHY device used in SGMII mode is ready */ bp->sgmii_phy = devm_phy_optional_get(&pdev->dev, NULL); if (IS_ERR(bp->sgmii_phy)) return dev_err_probe(&pdev->dev, PTR_ERR(bp->sgmii_phy), "failed to get SGMII PHY\n"); ret = phy_init(bp->sgmii_phy); if (ret) return dev_err_probe(&pdev->dev, ret, "failed to init SGMII PHY\n"); } ret = zynqmp_pm_is_function_supported(PM_IOCTL, IOCTL_SET_GEM_CONFIG); if (!ret) { u32 pm_info[2]; ret = of_property_read_u32_array(pdev->dev.of_node, "power-domains", pm_info, ARRAY_SIZE(pm_info)); if (ret) { dev_err(&pdev->dev, "Failed to read power management information\n"); goto err_out_phy_exit; } ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_FIXED, 0); if (ret) goto err_out_phy_exit; ret = zynqmp_pm_set_gem_config(pm_info[1], GEM_CONFIG_SGMII_MODE, 1); if (ret) goto err_out_phy_exit; } /* Fully reset controller at hardware level if mapped in device tree */ ret = device_reset_optional(&pdev->dev); if (ret) { phy_exit(bp->sgmii_phy); return dev_err_probe(&pdev->dev, ret, "failed to reset controller"); } ret = macb_init(pdev); err_out_phy_exit: if (ret) phy_exit(bp->sgmii_phy); return ret; } static const struct macb_usrio_config sama7g5_usrio = { .mii = 0, .rmii = 1, .rgmii = 2, .refclk = BIT(2), .hdfctlen = BIT(6), }; static const struct macb_config fu540_c000_config = { .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | MACB_CAPS_GEM_HAS_PTP, .dma_burst_length = 16, .clk_init = fu540_c000_clk_init, .init = fu540_c000_init, .jumbo_max_len = 10240, .usrio = &macb_default_usrio, }; static const struct macb_config at91sam9260_config = { .caps = MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config sama5d3macb_config = { .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config pc302gem_config = { .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config sama5d2_config = { .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config sama5d29_config = { .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_GEM_HAS_PTP, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config sama5d3_config = { .caps = MACB_CAPS_SG_DISABLED | MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_JUMBO, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .jumbo_max_len = 10240, .usrio = &macb_default_usrio, }; static const struct macb_config sama5d4_config = { .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII, .dma_burst_length = 4, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config emac_config = { .caps = MACB_CAPS_NEEDS_RSTONUBR | MACB_CAPS_MACB_IS_EMAC, .clk_init = at91ether_clk_init, .init = at91ether_init, .usrio = &macb_default_usrio, }; static const struct macb_config np4_config = { .caps = MACB_CAPS_USRIO_DISABLED, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config zynqmp_config = { .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = init_reset_optional, .jumbo_max_len = 10240, .usrio = &macb_default_usrio, }; static const struct macb_config zynq_config = { .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_NO_GIGABIT_HALF | MACB_CAPS_NEEDS_RSTONUBR, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, }; static const struct macb_config mpfs_config = { .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | MACB_CAPS_GEM_HAS_PTP, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = init_reset_optional, .usrio = &macb_default_usrio, .jumbo_max_len = 10240, }; static const struct macb_config sama7g5_gem_config = { .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_CLK_HW_CHG | MACB_CAPS_MIIONRGMII, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .usrio = &sama7g5_usrio, }; static const struct macb_config sama7g5_emac_config = { .caps = MACB_CAPS_USRIO_DEFAULT_IS_MII_GMII | MACB_CAPS_USRIO_HAS_CLKEN | MACB_CAPS_MIIONRGMII, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .usrio = &sama7g5_usrio, }; static const struct macb_config versal_config = { .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | MACB_CAPS_GEM_HAS_PTP | MACB_CAPS_BD_RD_PREFETCH | MACB_CAPS_NEED_TSUCLK, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = init_reset_optional, .jumbo_max_len = 10240, .usrio = &macb_default_usrio, }; static const struct of_device_id macb_dt_ids[] = { { .compatible = "cdns,at91sam9260-macb", .data = &at91sam9260_config }, { .compatible = "cdns,macb" }, { .compatible = "cdns,np4-macb", .data = &np4_config }, { .compatible = "cdns,pc302-gem", .data = &pc302gem_config }, { .compatible = "cdns,gem", .data = &pc302gem_config }, { .compatible = "cdns,sam9x60-macb", .data = &at91sam9260_config }, { .compatible = "atmel,sama5d2-gem", .data = &sama5d2_config }, { .compatible = "atmel,sama5d29-gem", .data = &sama5d29_config }, { .compatible = "atmel,sama5d3-gem", .data = &sama5d3_config }, { .compatible = "atmel,sama5d3-macb", .data = &sama5d3macb_config }, { .compatible = "atmel,sama5d4-gem", .data = &sama5d4_config }, { .compatible = "cdns,at91rm9200-emac", .data = &emac_config }, { .compatible = "cdns,emac", .data = &emac_config }, { .compatible = "cdns,zynqmp-gem", .data = &zynqmp_config}, /* deprecated */ { .compatible = "cdns,zynq-gem", .data = &zynq_config }, /* deprecated */ { .compatible = "sifive,fu540-c000-gem", .data = &fu540_c000_config }, { .compatible = "microchip,mpfs-macb", .data = &mpfs_config }, { .compatible = "microchip,sama7g5-gem", .data = &sama7g5_gem_config }, { .compatible = "microchip,sama7g5-emac", .data = &sama7g5_emac_config }, { .compatible = "xlnx,zynqmp-gem", .data = &zynqmp_config}, { .compatible = "xlnx,zynq-gem", .data = &zynq_config }, { .compatible = "xlnx,versal-gem", .data = &versal_config}, { /* sentinel */ } }; MODULE_DEVICE_TABLE(of, macb_dt_ids); #endif /* CONFIG_OF */ static const struct macb_config default_gem_config = { .caps = MACB_CAPS_GIGABIT_MODE_AVAILABLE | MACB_CAPS_JUMBO | MACB_CAPS_GEM_HAS_PTP, .dma_burst_length = 16, .clk_init = macb_clk_init, .init = macb_init, .usrio = &macb_default_usrio, .jumbo_max_len = 10240, }; static int macb_probe(struct platform_device *pdev) { const struct macb_config *macb_config = &default_gem_config; int (*clk_init)(struct platform_device *, struct clk **, struct clk **, struct clk **, struct clk **, struct clk **) = macb_config->clk_init; int (*init)(struct platform_device *) = macb_config->init; struct device_node *np = pdev->dev.of_node; struct clk *pclk, *hclk = NULL, *tx_clk = NULL, *rx_clk = NULL; struct clk *tsu_clk = NULL; unsigned int queue_mask, num_queues; bool native_io; phy_interface_t interface; struct net_device *dev; struct resource *regs; void __iomem *mem; struct macb *bp; int err, val; mem = devm_platform_get_and_ioremap_resource(pdev, 0, ®s); if (IS_ERR(mem)) return PTR_ERR(mem); if (np) { const struct of_device_id *match; match = of_match_node(macb_dt_ids, np); if (match && match->data) { macb_config = match->data; clk_init = macb_config->clk_init; init = macb_config->init; } } err = clk_init(pdev, &pclk, &hclk, &tx_clk, &rx_clk, &tsu_clk); if (err) return err; pm_runtime_set_autosuspend_delay(&pdev->dev, MACB_PM_TIMEOUT); pm_runtime_use_autosuspend(&pdev->dev); pm_runtime_get_noresume(&pdev->dev); pm_runtime_set_active(&pdev->dev); pm_runtime_enable(&pdev->dev); native_io = hw_is_native_io(mem); macb_probe_queues(mem, native_io, &queue_mask, &num_queues); dev = alloc_etherdev_mq(sizeof(*bp), num_queues); if (!dev) { err = -ENOMEM; goto err_disable_clocks; } dev->base_addr = regs->start; SET_NETDEV_DEV(dev, &pdev->dev); bp = netdev_priv(dev); bp->pdev = pdev; bp->dev = dev; bp->regs = mem; bp->native_io = native_io; if (native_io) { bp->macb_reg_readl = hw_readl_native; bp->macb_reg_writel = hw_writel_native; } else { bp->macb_reg_readl = hw_readl; bp->macb_reg_writel = hw_writel; } bp->num_queues = num_queues; bp->queue_mask = queue_mask; if (macb_config) bp->dma_burst_length = macb_config->dma_burst_length; bp->pclk = pclk; bp->hclk = hclk; bp->tx_clk = tx_clk; bp->rx_clk = rx_clk; bp->tsu_clk = tsu_clk; if (macb_config) bp->jumbo_max_len = macb_config->jumbo_max_len; bp->wol = 0; if (of_get_property(np, "magic-packet", NULL)) bp->wol |= MACB_WOL_HAS_MAGIC_PACKET; device_set_wakeup_capable(&pdev->dev, bp->wol & MACB_WOL_HAS_MAGIC_PACKET); bp->usrio = macb_config->usrio; spin_lock_init(&bp->lock); /* setup capabilities */ macb_configure_caps(bp, macb_config); #ifdef CONFIG_ARCH_DMA_ADDR_T_64BIT if (GEM_BFEXT(DAW64, gem_readl(bp, DCFG6))) { dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(44)); bp->hw_dma_cap |= HW_DMA_CAP_64B; } #endif platform_set_drvdata(pdev, dev); dev->irq = platform_get_irq(pdev, 0); if (dev->irq < 0) { err = dev->irq; goto err_out_free_netdev; } /* MTU range: 68 - 1500 or 10240 */ dev->min_mtu = GEM_MTU_MIN_SIZE; if ((bp->caps & MACB_CAPS_JUMBO) && bp->jumbo_max_len) dev->max_mtu = bp->jumbo_max_len - ETH_HLEN - ETH_FCS_LEN; else dev->max_mtu = ETH_DATA_LEN; if (bp->caps & MACB_CAPS_BD_RD_PREFETCH) { val = GEM_BFEXT(RXBD_RDBUFF, gem_readl(bp, DCFG10)); if (val) bp->rx_bd_rd_prefetch = (2 << (val - 1)) * macb_dma_desc_get_size(bp); val = GEM_BFEXT(TXBD_RDBUFF, gem_readl(bp, DCFG10)); if (val) bp->tx_bd_rd_prefetch = (2 << (val - 1)) * macb_dma_desc_get_size(bp); } bp->rx_intr_mask = MACB_RX_INT_FLAGS; if (bp->caps & MACB_CAPS_NEEDS_RSTONUBR) bp->rx_intr_mask |= MACB_BIT(RXUBR); err = of_get_ethdev_address(np, bp->dev); if (err == -EPROBE_DEFER) goto err_out_free_netdev; else if (err) macb_get_hwaddr(bp); err = of_get_phy_mode(np, &interface); if (err) /* not found in DT, MII by default */ bp->phy_interface = PHY_INTERFACE_MODE_MII; else bp->phy_interface = interface; /* IP specific init */ err = init(pdev); if (err) goto err_out_free_netdev; err = macb_mii_init(bp); if (err) goto err_out_phy_exit; netif_carrier_off(dev); err = register_netdev(dev); if (err) { dev_err(&pdev->dev, "Cannot register net device, aborting.\n"); goto err_out_unregister_mdio; } tasklet_setup(&bp->hresp_err_tasklet, macb_hresp_error_task); netdev_info(dev, "Cadence %s rev 0x%08x at 0x%08lx irq %d (%pM)\n", macb_is_gem(bp) ? "GEM" : "MACB", macb_readl(bp, MID), dev->base_addr, dev->irq, dev->dev_addr); pm_runtime_mark_last_busy(&bp->pdev->dev); pm_runtime_put_autosuspend(&bp->pdev->dev); return 0; err_out_unregister_mdio: mdiobus_unregister(bp->mii_bus); mdiobus_free(bp->mii_bus); err_out_phy_exit: phy_exit(bp->sgmii_phy); err_out_free_netdev: free_netdev(dev); err_disable_clocks: macb_clks_disable(pclk, hclk, tx_clk, rx_clk, tsu_clk); pm_runtime_disable(&pdev->dev); pm_runtime_set_suspended(&pdev->dev); pm_runtime_dont_use_autosuspend(&pdev->dev); return err; } static int macb_remove(struct platform_device *pdev) { struct net_device *dev; struct macb *bp; dev = platform_get_drvdata(pdev); if (dev) { bp = netdev_priv(dev); phy_exit(bp->sgmii_phy); mdiobus_unregister(bp->mii_bus); mdiobus_free(bp->mii_bus); unregister_netdev(dev); tasklet_kill(&bp->hresp_err_tasklet); pm_runtime_disable(&pdev->dev); pm_runtime_dont_use_autosuspend(&pdev->dev); if (!pm_runtime_suspended(&pdev->dev)) { macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk, bp->rx_clk, bp->tsu_clk); pm_runtime_set_suspended(&pdev->dev); } phylink_destroy(bp->phylink); free_netdev(dev); } return 0; } static int __maybe_unused macb_suspend(struct device *dev) { struct net_device *netdev = dev_get_drvdata(dev); struct macb *bp = netdev_priv(netdev); struct macb_queue *queue; unsigned long flags; unsigned int q; int err; if (!netif_running(netdev)) return 0; if (bp->wol & MACB_WOL_ENABLED) { spin_lock_irqsave(&bp->lock, flags); /* Flush all status bits */ macb_writel(bp, TSR, -1); macb_writel(bp, RSR, -1); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { /* Disable all interrupts */ queue_writel(queue, IDR, -1); queue_readl(queue, ISR); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(queue, ISR, -1); } /* Change interrupt handler and * Enable WoL IRQ on queue 0 */ devm_free_irq(dev, bp->queues[0].irq, bp->queues); if (macb_is_gem(bp)) { err = devm_request_irq(dev, bp->queues[0].irq, gem_wol_interrupt, IRQF_SHARED, netdev->name, bp->queues); if (err) { dev_err(dev, "Unable to request IRQ %d (error %d)\n", bp->queues[0].irq, err); spin_unlock_irqrestore(&bp->lock, flags); return err; } queue_writel(bp->queues, IER, GEM_BIT(WOL)); gem_writel(bp, WOL, MACB_BIT(MAG)); } else { err = devm_request_irq(dev, bp->queues[0].irq, macb_wol_interrupt, IRQF_SHARED, netdev->name, bp->queues); if (err) { dev_err(dev, "Unable to request IRQ %d (error %d)\n", bp->queues[0].irq, err); spin_unlock_irqrestore(&bp->lock, flags); return err; } queue_writel(bp->queues, IER, MACB_BIT(WOL)); macb_writel(bp, WOL, MACB_BIT(MAG)); } spin_unlock_irqrestore(&bp->lock, flags); enable_irq_wake(bp->queues[0].irq); } netif_device_detach(netdev); for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { napi_disable(&queue->napi_rx); napi_disable(&queue->napi_tx); } if (!(bp->wol & MACB_WOL_ENABLED)) { rtnl_lock(); phylink_stop(bp->phylink); phy_exit(bp->sgmii_phy); rtnl_unlock(); spin_lock_irqsave(&bp->lock, flags); macb_reset_hw(bp); spin_unlock_irqrestore(&bp->lock, flags); } if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) bp->pm_data.usrio = macb_or_gem_readl(bp, USRIO); if (netdev->hw_features & NETIF_F_NTUPLE) bp->pm_data.scrt2 = gem_readl_n(bp, ETHT, SCRT2_ETHT); if (bp->ptp_info) bp->ptp_info->ptp_remove(netdev); if (!device_may_wakeup(dev)) pm_runtime_force_suspend(dev); return 0; } static int __maybe_unused macb_resume(struct device *dev) { struct net_device *netdev = dev_get_drvdata(dev); struct macb *bp = netdev_priv(netdev); struct macb_queue *queue; unsigned long flags; unsigned int q; int err; if (!netif_running(netdev)) return 0; if (!device_may_wakeup(dev)) pm_runtime_force_resume(dev); if (bp->wol & MACB_WOL_ENABLED) { spin_lock_irqsave(&bp->lock, flags); /* Disable WoL */ if (macb_is_gem(bp)) { queue_writel(bp->queues, IDR, GEM_BIT(WOL)); gem_writel(bp, WOL, 0); } else { queue_writel(bp->queues, IDR, MACB_BIT(WOL)); macb_writel(bp, WOL, 0); } /* Clear ISR on queue 0 */ queue_readl(bp->queues, ISR); if (bp->caps & MACB_CAPS_ISR_CLEAR_ON_WRITE) queue_writel(bp->queues, ISR, -1); /* Replace interrupt handler on queue 0 */ devm_free_irq(dev, bp->queues[0].irq, bp->queues); err = devm_request_irq(dev, bp->queues[0].irq, macb_interrupt, IRQF_SHARED, netdev->name, bp->queues); if (err) { dev_err(dev, "Unable to request IRQ %d (error %d)\n", bp->queues[0].irq, err); spin_unlock_irqrestore(&bp->lock, flags); return err; } spin_unlock_irqrestore(&bp->lock, flags); disable_irq_wake(bp->queues[0].irq); /* Now make sure we disable phy before moving * to common restore path */ rtnl_lock(); phylink_stop(bp->phylink); rtnl_unlock(); } for (q = 0, queue = bp->queues; q < bp->num_queues; ++q, ++queue) { napi_enable(&queue->napi_rx); napi_enable(&queue->napi_tx); } if (netdev->hw_features & NETIF_F_NTUPLE) gem_writel_n(bp, ETHT, SCRT2_ETHT, bp->pm_data.scrt2); if (!(bp->caps & MACB_CAPS_USRIO_DISABLED)) macb_or_gem_writel(bp, USRIO, bp->pm_data.usrio); macb_writel(bp, NCR, MACB_BIT(MPE)); macb_init_hw(bp); macb_set_rx_mode(netdev); macb_restore_features(bp); rtnl_lock(); if (!device_may_wakeup(&bp->dev->dev)) phy_init(bp->sgmii_phy); phylink_start(bp->phylink); rtnl_unlock(); netif_device_attach(netdev); if (bp->ptp_info) bp->ptp_info->ptp_init(netdev); return 0; } static int __maybe_unused macb_runtime_suspend(struct device *dev) { struct net_device *netdev = dev_get_drvdata(dev); struct macb *bp = netdev_priv(netdev); if (!(device_may_wakeup(dev))) macb_clks_disable(bp->pclk, bp->hclk, bp->tx_clk, bp->rx_clk, bp->tsu_clk); else if (!(bp->caps & MACB_CAPS_NEED_TSUCLK)) macb_clks_disable(NULL, NULL, NULL, NULL, bp->tsu_clk); return 0; } static int __maybe_unused macb_runtime_resume(struct device *dev) { struct net_device *netdev = dev_get_drvdata(dev); struct macb *bp = netdev_priv(netdev); if (!(device_may_wakeup(dev))) { clk_prepare_enable(bp->pclk); clk_prepare_enable(bp->hclk); clk_prepare_enable(bp->tx_clk); clk_prepare_enable(bp->rx_clk); clk_prepare_enable(bp->tsu_clk); } else if (!(bp->caps & MACB_CAPS_NEED_TSUCLK)) { clk_prepare_enable(bp->tsu_clk); } return 0; } static const struct dev_pm_ops macb_pm_ops = { SET_SYSTEM_SLEEP_PM_OPS(macb_suspend, macb_resume) SET_RUNTIME_PM_OPS(macb_runtime_suspend, macb_runtime_resume, NULL) }; static struct platform_driver macb_driver = { .probe = macb_probe, .remove = macb_remove, .driver = { .name = "macb", .of_match_table = of_match_ptr(macb_dt_ids), .pm = &macb_pm_ops, }, }; module_platform_driver(macb_driver); MODULE_LICENSE("GPL"); MODULE_DESCRIPTION("Cadence MACB/GEM Ethernet driver"); MODULE_AUTHOR("Haavard Skinnemoen (Atmel)"); MODULE_ALIAS("platform:macb");
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