Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2 | * drivers/net/ibm_emac/ibm_emac_core.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 3 | * |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 4 | * Driver for PowerPC 4xx on-chip ethernet controller. |
| 5 | * |
| 6 | * Copyright (c) 2004, 2005 Zultys Technologies. |
| 7 | * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 8 | * |
| 9 | * Based on original work by |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 10 | * Matt Porter <mporter@kernel.crashing.org> |
| 11 | * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | * Armin Kuster <akuster@mvista.com> |
| 13 | * Johnnie Peters <jpeters@mvista.com> |
| 14 | * |
| 15 | * This program is free software; you can redistribute it and/or modify it |
| 16 | * under the terms of the GNU General Public License as published by the |
| 17 | * Free Software Foundation; either version 2 of the License, or (at your |
| 18 | * option) any later version. |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 19 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | */ |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/module.h> |
| 23 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/errno.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include <linux/interrupt.h> |
| 27 | #include <linux/delay.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/types.h> |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 30 | #include <linux/pci.h> |
| 31 | #include <linux/netdevice.h> |
| 32 | #include <linux/etherdevice.h> |
| 33 | #include <linux/skbuff.h> |
| 34 | #include <linux/crc32.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/ethtool.h> |
| 36 | #include <linux/mii.h> |
| 37 | #include <linux/bitops.h> |
| 38 | |
| 39 | #include <asm/processor.h> |
| 40 | #include <asm/io.h> |
| 41 | #include <asm/dma.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/uaccess.h> |
| 43 | #include <asm/ocp.h> |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #include "ibm_emac_core.h" |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 46 | #include "ibm_emac_debug.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
| 48 | /* |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 49 | * Lack of dma_unmap_???? calls is intentional. |
| 50 | * |
| 51 | * API-correct usage requires additional support state information to be |
| 52 | * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to |
| 53 | * EMAC design (e.g. TX buffer passed from network stack can be split into |
| 54 | * several BDs, dma_map_single/dma_map_page can be used to map particular BD), |
| 55 | * maintaining such information will add additional overhead. |
| 56 | * Current DMA API implementation for 4xx processors only ensures cache coherency |
| 57 | * and dma_unmap_???? routines are empty and are likely to stay this way. |
| 58 | * I decided to omit dma_unmap_??? calls because I don't want to add additional |
| 59 | * complexity just for the sake of following some abstract API, when it doesn't |
| 60 | * add any real benefit to the driver. I understand that this decision maybe |
| 61 | * controversial, but I really tried to make code API-correct and efficient |
| 62 | * at the same time and didn't come up with code I liked :(. --ebs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 64 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 65 | #define DRV_NAME "emac" |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 66 | #define DRV_VERSION "3.54" |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 67 | #define DRV_DESC "PPC 4xx OCP EMAC driver" |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | MODULE_DESCRIPTION(DRV_DESC); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 70 | MODULE_AUTHOR |
| 71 | ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | MODULE_LICENSE("GPL"); |
| 73 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 74 | /* minimum number of free TX descriptors required to wake up TX process */ |
| 75 | #define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 77 | /* If packet size is less than this number, we allocate small skb and copy packet |
| 78 | * contents into it instead of just sending original big skb up |
| 79 | */ |
| 80 | #define EMAC_RX_COPY_THRESH CONFIG_IBM_EMAC_RX_COPY_THRESHOLD |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 81 | |
| 82 | /* Since multiple EMACs share MDIO lines in various ways, we need |
| 83 | * to avoid re-using the same PHY ID in cases where the arch didn't |
| 84 | * setup precise phy_map entries |
| 85 | */ |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 86 | static u32 busy_phy_map; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | |
Eugene Surovegin | 1b19591 | 2005-10-29 12:45:31 -0700 | [diff] [blame] | 88 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) && \ |
| 89 | (defined(CONFIG_405EP) || defined(CONFIG_440EP) || defined(CONFIG_440GR)) |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 90 | /* 405EP has "EMAC to PHY Control Register" (CPC0_EPCTL) which can help us |
| 91 | * with PHY RX clock problem. |
Eugene Surovegin | 1b19591 | 2005-10-29 12:45:31 -0700 | [diff] [blame] | 92 | * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX, which |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 93 | * also allows controlling each EMAC clock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | */ |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 95 | static inline void EMAC_RX_CLK_TX(int idx) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 97 | unsigned long flags; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 98 | local_irq_save(flags); |
| 99 | |
| 100 | #if defined(CONFIG_405EP) |
| 101 | mtdcr(0xf3, mfdcr(0xf3) | (1 << idx)); |
Eugene Surovegin | 1b19591 | 2005-10-29 12:45:31 -0700 | [diff] [blame] | 102 | #else /* CONFIG_440EP || CONFIG_440GR */ |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 103 | SDR_WRITE(DCRN_SDR_MFR, SDR_READ(DCRN_SDR_MFR) | (0x08000000 >> idx)); |
| 104 | #endif |
| 105 | |
| 106 | local_irq_restore(flags); |
| 107 | } |
| 108 | |
| 109 | static inline void EMAC_RX_CLK_DEFAULT(int idx) |
| 110 | { |
| 111 | unsigned long flags; |
| 112 | local_irq_save(flags); |
| 113 | |
| 114 | #if defined(CONFIG_405EP) |
| 115 | mtdcr(0xf3, mfdcr(0xf3) & ~(1 << idx)); |
| 116 | #else /* CONFIG_440EP */ |
| 117 | SDR_WRITE(DCRN_SDR_MFR, SDR_READ(DCRN_SDR_MFR) & ~(0x08000000 >> idx)); |
| 118 | #endif |
| 119 | |
| 120 | local_irq_restore(flags); |
| 121 | } |
| 122 | #else |
| 123 | #define EMAC_RX_CLK_TX(idx) ((void)0) |
| 124 | #define EMAC_RX_CLK_DEFAULT(idx) ((void)0) |
| 125 | #endif |
| 126 | |
| 127 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) && defined(CONFIG_440GX) |
| 128 | /* We can switch Ethernet clock to the internal source through SDR0_MFR[ECS], |
| 129 | * unfortunately this is less flexible than 440EP case, because it's a global |
| 130 | * setting for all EMACs, therefore we do this clock trick only during probe. |
| 131 | */ |
| 132 | #define EMAC_CLK_INTERNAL SDR_WRITE(DCRN_SDR_MFR, \ |
| 133 | SDR_READ(DCRN_SDR_MFR) | 0x08000000) |
| 134 | #define EMAC_CLK_EXTERNAL SDR_WRITE(DCRN_SDR_MFR, \ |
| 135 | SDR_READ(DCRN_SDR_MFR) & ~0x08000000) |
| 136 | #else |
| 137 | #define EMAC_CLK_INTERNAL ((void)0) |
| 138 | #define EMAC_CLK_EXTERNAL ((void)0) |
| 139 | #endif |
| 140 | |
| 141 | /* I don't want to litter system log with timeout errors |
| 142 | * when we have brain-damaged PHY. |
| 143 | */ |
| 144 | static inline void emac_report_timeout_error(struct ocp_enet_private *dev, |
| 145 | const char *error) |
| 146 | { |
| 147 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) |
| 148 | DBG("%d: %s" NL, dev->def->index, error); |
| 149 | #else |
| 150 | if (net_ratelimit()) |
| 151 | printk(KERN_ERR "emac%d: %s\n", dev->def->index, error); |
| 152 | #endif |
| 153 | } |
| 154 | |
| 155 | /* PHY polling intervals */ |
| 156 | #define PHY_POLL_LINK_ON HZ |
| 157 | #define PHY_POLL_LINK_OFF (HZ / 5) |
| 158 | |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 159 | /* Graceful stop timeouts in us. |
| 160 | * We should allow up to 1 frame time (full-duplex, ignoring collisions) |
| 161 | */ |
| 162 | #define STOP_TIMEOUT_10 1230 |
| 163 | #define STOP_TIMEOUT_100 124 |
| 164 | #define STOP_TIMEOUT_1000 13 |
| 165 | #define STOP_TIMEOUT_1000_JUMBO 73 |
| 166 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 167 | /* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */ |
| 168 | static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = { |
| 169 | "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum", |
| 170 | "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom", |
| 171 | "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu", |
| 172 | "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet", |
| 173 | "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error", |
| 174 | "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range", |
| 175 | "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun", |
| 176 | "rx_bad_packet", "rx_runt_packet", "rx_short_event", |
| 177 | "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long", |
| 178 | "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors", |
| 179 | "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral", |
| 180 | "tx_bd_excessive_collisions", "tx_bd_late_collision", |
| 181 | "tx_bd_multple_collisions", "tx_bd_single_collision", |
| 182 | "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe", |
| 183 | "tx_errors" |
| 184 | }; |
| 185 | |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 186 | static irqreturn_t emac_irq(int irq, void *dev_instance); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 187 | static void emac_clean_tx_ring(struct ocp_enet_private *dev); |
| 188 | |
| 189 | static inline int emac_phy_supports_gige(int phy_mode) |
| 190 | { |
| 191 | return phy_mode == PHY_MODE_GMII || |
| 192 | phy_mode == PHY_MODE_RGMII || |
| 193 | phy_mode == PHY_MODE_TBI || |
| 194 | phy_mode == PHY_MODE_RTBI; |
| 195 | } |
| 196 | |
| 197 | static inline int emac_phy_gpcs(int phy_mode) |
| 198 | { |
| 199 | return phy_mode == PHY_MODE_TBI || |
| 200 | phy_mode == PHY_MODE_RTBI; |
| 201 | } |
| 202 | |
| 203 | static inline void emac_tx_enable(struct ocp_enet_private *dev) |
| 204 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 205 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 206 | unsigned long flags; |
| 207 | u32 r; |
| 208 | |
| 209 | local_irq_save(flags); |
| 210 | |
| 211 | DBG("%d: tx_enable" NL, dev->def->index); |
| 212 | |
| 213 | r = in_be32(&p->mr0); |
| 214 | if (!(r & EMAC_MR0_TXE)) |
| 215 | out_be32(&p->mr0, r | EMAC_MR0_TXE); |
| 216 | local_irq_restore(flags); |
| 217 | } |
| 218 | |
| 219 | static void emac_tx_disable(struct ocp_enet_private *dev) |
| 220 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 221 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 222 | unsigned long flags; |
| 223 | u32 r; |
| 224 | |
| 225 | local_irq_save(flags); |
| 226 | |
| 227 | DBG("%d: tx_disable" NL, dev->def->index); |
| 228 | |
| 229 | r = in_be32(&p->mr0); |
| 230 | if (r & EMAC_MR0_TXE) { |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 231 | int n = dev->stop_timeout; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 232 | out_be32(&p->mr0, r & ~EMAC_MR0_TXE); |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 233 | while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) { |
| 234 | udelay(1); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 235 | --n; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 236 | } |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 237 | if (unlikely(!n)) |
| 238 | emac_report_timeout_error(dev, "TX disable timeout"); |
| 239 | } |
| 240 | local_irq_restore(flags); |
| 241 | } |
| 242 | |
| 243 | static void emac_rx_enable(struct ocp_enet_private *dev) |
| 244 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 245 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 246 | unsigned long flags; |
| 247 | u32 r; |
| 248 | |
| 249 | local_irq_save(flags); |
| 250 | if (unlikely(dev->commac.rx_stopped)) |
| 251 | goto out; |
| 252 | |
| 253 | DBG("%d: rx_enable" NL, dev->def->index); |
| 254 | |
| 255 | r = in_be32(&p->mr0); |
| 256 | if (!(r & EMAC_MR0_RXE)) { |
| 257 | if (unlikely(!(r & EMAC_MR0_RXI))) { |
| 258 | /* Wait if previous async disable is still in progress */ |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 259 | int n = dev->stop_timeout; |
| 260 | while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { |
| 261 | udelay(1); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 262 | --n; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 263 | } |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 264 | if (unlikely(!n)) |
| 265 | emac_report_timeout_error(dev, |
| 266 | "RX disable timeout"); |
| 267 | } |
| 268 | out_be32(&p->mr0, r | EMAC_MR0_RXE); |
| 269 | } |
| 270 | out: |
| 271 | local_irq_restore(flags); |
| 272 | } |
| 273 | |
| 274 | static void emac_rx_disable(struct ocp_enet_private *dev) |
| 275 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 276 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 277 | unsigned long flags; |
| 278 | u32 r; |
| 279 | |
| 280 | local_irq_save(flags); |
| 281 | |
| 282 | DBG("%d: rx_disable" NL, dev->def->index); |
| 283 | |
| 284 | r = in_be32(&p->mr0); |
| 285 | if (r & EMAC_MR0_RXE) { |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 286 | int n = dev->stop_timeout; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 287 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 288 | while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { |
| 289 | udelay(1); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 290 | --n; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 291 | } |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 292 | if (unlikely(!n)) |
| 293 | emac_report_timeout_error(dev, "RX disable timeout"); |
| 294 | } |
| 295 | local_irq_restore(flags); |
| 296 | } |
| 297 | |
| 298 | static inline void emac_rx_disable_async(struct ocp_enet_private *dev) |
| 299 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 300 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 301 | unsigned long flags; |
| 302 | u32 r; |
| 303 | |
| 304 | local_irq_save(flags); |
| 305 | |
| 306 | DBG("%d: rx_disable_async" NL, dev->def->index); |
| 307 | |
| 308 | r = in_be32(&p->mr0); |
| 309 | if (r & EMAC_MR0_RXE) |
| 310 | out_be32(&p->mr0, r & ~EMAC_MR0_RXE); |
| 311 | local_irq_restore(flags); |
| 312 | } |
| 313 | |
| 314 | static int emac_reset(struct ocp_enet_private *dev) |
| 315 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 316 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 317 | unsigned long flags; |
| 318 | int n = 20; |
| 319 | |
| 320 | DBG("%d: reset" NL, dev->def->index); |
| 321 | |
| 322 | local_irq_save(flags); |
| 323 | |
| 324 | if (!dev->reset_failed) { |
| 325 | /* 40x erratum suggests stopping RX channel before reset, |
| 326 | * we stop TX as well |
| 327 | */ |
| 328 | emac_rx_disable(dev); |
| 329 | emac_tx_disable(dev); |
| 330 | } |
| 331 | |
| 332 | out_be32(&p->mr0, EMAC_MR0_SRST); |
| 333 | while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) |
| 334 | --n; |
| 335 | local_irq_restore(flags); |
| 336 | |
| 337 | if (n) { |
| 338 | dev->reset_failed = 0; |
| 339 | return 0; |
| 340 | } else { |
| 341 | emac_report_timeout_error(dev, "reset timeout"); |
| 342 | dev->reset_failed = 1; |
| 343 | return -ETIMEDOUT; |
| 344 | } |
| 345 | } |
| 346 | |
| 347 | static void emac_hash_mc(struct ocp_enet_private *dev) |
| 348 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 349 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 350 | u16 gaht[4] = { 0 }; |
| 351 | struct dev_mc_list *dmi; |
| 352 | |
| 353 | DBG("%d: hash_mc %d" NL, dev->def->index, dev->ndev->mc_count); |
| 354 | |
| 355 | for (dmi = dev->ndev->mc_list; dmi; dmi = dmi->next) { |
| 356 | int bit; |
| 357 | DBG2("%d: mc %02x:%02x:%02x:%02x:%02x:%02x" NL, |
| 358 | dev->def->index, |
| 359 | dmi->dmi_addr[0], dmi->dmi_addr[1], dmi->dmi_addr[2], |
| 360 | dmi->dmi_addr[3], dmi->dmi_addr[4], dmi->dmi_addr[5]); |
| 361 | |
| 362 | bit = 63 - (ether_crc(ETH_ALEN, dmi->dmi_addr) >> 26); |
| 363 | gaht[bit >> 4] |= 0x8000 >> (bit & 0x0f); |
| 364 | } |
| 365 | out_be32(&p->gaht1, gaht[0]); |
| 366 | out_be32(&p->gaht2, gaht[1]); |
| 367 | out_be32(&p->gaht3, gaht[2]); |
| 368 | out_be32(&p->gaht4, gaht[3]); |
| 369 | } |
| 370 | |
| 371 | static inline u32 emac_iff2rmr(struct net_device *ndev) |
| 372 | { |
| 373 | u32 r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE | |
| 374 | EMAC_RMR_BASE; |
| 375 | |
| 376 | if (ndev->flags & IFF_PROMISC) |
| 377 | r |= EMAC_RMR_PME; |
| 378 | else if (ndev->flags & IFF_ALLMULTI || ndev->mc_count > 32) |
| 379 | r |= EMAC_RMR_PMME; |
| 380 | else if (ndev->mc_count > 0) |
| 381 | r |= EMAC_RMR_MAE; |
| 382 | |
| 383 | return r; |
| 384 | } |
| 385 | |
| 386 | static inline int emac_opb_mhz(void) |
| 387 | { |
| 388 | return (ocp_sys_info.opb_bus_freq + 500000) / 1000000; |
| 389 | } |
| 390 | |
| 391 | /* BHs disabled */ |
| 392 | static int emac_configure(struct ocp_enet_private *dev) |
| 393 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 394 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 395 | struct net_device *ndev = dev->ndev; |
| 396 | int gige; |
| 397 | u32 r; |
| 398 | |
| 399 | DBG("%d: configure" NL, dev->def->index); |
| 400 | |
| 401 | if (emac_reset(dev) < 0) |
| 402 | return -ETIMEDOUT; |
| 403 | |
| 404 | tah_reset(dev->tah_dev); |
| 405 | |
| 406 | /* Mode register */ |
| 407 | r = EMAC_MR1_BASE(emac_opb_mhz()) | EMAC_MR1_VLE | EMAC_MR1_IST; |
| 408 | if (dev->phy.duplex == DUPLEX_FULL) |
Eugene Surovegin | 3884388 | 2005-12-27 12:36:41 -0800 | [diff] [blame] | 409 | r |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 410 | dev->stop_timeout = STOP_TIMEOUT_10; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 411 | switch (dev->phy.speed) { |
| 412 | case SPEED_1000: |
| 413 | if (emac_phy_gpcs(dev->phy.mode)) { |
| 414 | r |= EMAC_MR1_MF_1000GPCS | |
| 415 | EMAC_MR1_MF_IPPA(dev->phy.address); |
| 416 | |
| 417 | /* Put some arbitrary OUI, Manuf & Rev IDs so we can |
| 418 | * identify this GPCS PHY later. |
| 419 | */ |
| 420 | out_be32(&p->ipcr, 0xdeadbeef); |
| 421 | } else |
| 422 | r |= EMAC_MR1_MF_1000; |
| 423 | r |= EMAC_MR1_RFS_16K; |
| 424 | gige = 1; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 425 | |
| 426 | if (dev->ndev->mtu > ETH_DATA_LEN) { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 427 | r |= EMAC_MR1_JPSM; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 428 | dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO; |
| 429 | } else |
| 430 | dev->stop_timeout = STOP_TIMEOUT_1000; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 431 | break; |
| 432 | case SPEED_100: |
| 433 | r |= EMAC_MR1_MF_100; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 434 | dev->stop_timeout = STOP_TIMEOUT_100; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 435 | /* Fall through */ |
| 436 | default: |
| 437 | r |= EMAC_MR1_RFS_4K; |
| 438 | gige = 0; |
| 439 | break; |
| 440 | } |
| 441 | |
| 442 | if (dev->rgmii_dev) |
| 443 | rgmii_set_speed(dev->rgmii_dev, dev->rgmii_input, |
| 444 | dev->phy.speed); |
| 445 | else |
| 446 | zmii_set_speed(dev->zmii_dev, dev->zmii_input, dev->phy.speed); |
| 447 | |
| 448 | #if !defined(CONFIG_40x) |
| 449 | /* on 40x erratum forces us to NOT use integrated flow control, |
| 450 | * let's hope it works on 44x ;) |
| 451 | */ |
| 452 | if (dev->phy.duplex == DUPLEX_FULL) { |
| 453 | if (dev->phy.pause) |
| 454 | r |= EMAC_MR1_EIFC | EMAC_MR1_APP; |
| 455 | else if (dev->phy.asym_pause) |
| 456 | r |= EMAC_MR1_APP; |
| 457 | } |
| 458 | #endif |
| 459 | out_be32(&p->mr1, r); |
| 460 | |
| 461 | /* Set individual MAC address */ |
| 462 | out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); |
| 463 | out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | |
| 464 | (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | |
| 465 | ndev->dev_addr[5]); |
| 466 | |
| 467 | /* VLAN Tag Protocol ID */ |
| 468 | out_be32(&p->vtpid, 0x8100); |
| 469 | |
| 470 | /* Receive mode register */ |
| 471 | r = emac_iff2rmr(ndev); |
| 472 | if (r & EMAC_RMR_MAE) |
| 473 | emac_hash_mc(dev); |
| 474 | out_be32(&p->rmr, r); |
| 475 | |
| 476 | /* FIFOs thresholds */ |
| 477 | r = EMAC_TMR1((EMAC_MAL_BURST_SIZE / EMAC_FIFO_ENTRY_SIZE) + 1, |
| 478 | EMAC_TX_FIFO_SIZE / 2 / EMAC_FIFO_ENTRY_SIZE); |
| 479 | out_be32(&p->tmr1, r); |
| 480 | out_be32(&p->trtr, EMAC_TRTR(EMAC_TX_FIFO_SIZE / 2)); |
| 481 | |
| 482 | /* PAUSE frame is sent when RX FIFO reaches its high-water mark, |
| 483 | there should be still enough space in FIFO to allow the our link |
| 484 | partner time to process this frame and also time to send PAUSE |
| 485 | frame itself. |
| 486 | |
| 487 | Here is the worst case scenario for the RX FIFO "headroom" |
| 488 | (from "The Switch Book") (100Mbps, without preamble, inter-frame gap): |
| 489 | |
| 490 | 1) One maximum-length frame on TX 1522 bytes |
| 491 | 2) One PAUSE frame time 64 bytes |
| 492 | 3) PAUSE frame decode time allowance 64 bytes |
| 493 | 4) One maximum-length frame on RX 1522 bytes |
| 494 | 5) Round-trip propagation delay of the link (100Mb) 15 bytes |
| 495 | ---------- |
| 496 | 3187 bytes |
| 497 | |
| 498 | I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes) |
| 499 | low-water mark to RX_FIFO_SIZE / 8 (512 bytes) |
| 500 | */ |
| 501 | r = EMAC_RWMR(EMAC_RX_FIFO_SIZE(gige) / 8 / EMAC_FIFO_ENTRY_SIZE, |
| 502 | EMAC_RX_FIFO_SIZE(gige) / 4 / EMAC_FIFO_ENTRY_SIZE); |
| 503 | out_be32(&p->rwmr, r); |
| 504 | |
| 505 | /* Set PAUSE timer to the maximum */ |
| 506 | out_be32(&p->ptr, 0xffff); |
| 507 | |
| 508 | /* IRQ sources */ |
| 509 | out_be32(&p->iser, EMAC_ISR_TXPE | EMAC_ISR_RXPE | /* EMAC_ISR_TXUE | |
| 510 | EMAC_ISR_RXOE | */ EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE | |
| 511 | EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE | |
| 512 | EMAC_ISR_IRE | EMAC_ISR_TE); |
| 513 | |
| 514 | /* We need to take GPCS PHY out of isolate mode after EMAC reset */ |
| 515 | if (emac_phy_gpcs(dev->phy.mode)) |
| 516 | mii_reset_phy(&dev->phy); |
| 517 | |
| 518 | return 0; |
| 519 | } |
| 520 | |
| 521 | /* BHs disabled */ |
| 522 | static void emac_reinitialize(struct ocp_enet_private *dev) |
| 523 | { |
| 524 | DBG("%d: reinitialize" NL, dev->def->index); |
| 525 | |
| 526 | if (!emac_configure(dev)) { |
| 527 | emac_tx_enable(dev); |
| 528 | emac_rx_enable(dev); |
| 529 | } |
| 530 | } |
| 531 | |
| 532 | /* BHs disabled */ |
| 533 | static void emac_full_tx_reset(struct net_device *ndev) |
| 534 | { |
| 535 | struct ocp_enet_private *dev = ndev->priv; |
| 536 | struct ocp_func_emac_data *emacdata = dev->def->additions; |
| 537 | |
| 538 | DBG("%d: full_tx_reset" NL, dev->def->index); |
| 539 | |
| 540 | emac_tx_disable(dev); |
| 541 | mal_disable_tx_channel(dev->mal, emacdata->mal_tx_chan); |
| 542 | emac_clean_tx_ring(dev); |
| 543 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0; |
| 544 | |
| 545 | emac_configure(dev); |
| 546 | |
| 547 | mal_enable_tx_channel(dev->mal, emacdata->mal_tx_chan); |
| 548 | emac_tx_enable(dev); |
| 549 | emac_rx_enable(dev); |
| 550 | |
| 551 | netif_wake_queue(ndev); |
| 552 | } |
| 553 | |
| 554 | static int __emac_mdio_read(struct ocp_enet_private *dev, u8 id, u8 reg) |
| 555 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 556 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 557 | u32 r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | int n; |
| 559 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 560 | DBG2("%d: mdio_read(%02x,%02x)" NL, dev->def->index, id, reg); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 562 | /* Enable proper MDIO port */ |
| 563 | zmii_enable_mdio(dev->zmii_dev, dev->zmii_input); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 564 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 565 | /* Wait for management interface to become idle */ |
| 566 | n = 10; |
Eugene Surovegin | 7ad8a89 | 2005-10-29 12:43:14 -0700 | [diff] [blame] | 567 | while (!emac_phy_done(in_be32(&p->stacr))) { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 568 | udelay(1); |
| 569 | if (!--n) |
| 570 | goto to; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 571 | } |
| 572 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 573 | /* Issue read command */ |
| 574 | out_be32(&p->stacr, |
| 575 | EMAC_STACR_BASE(emac_opb_mhz()) | EMAC_STACR_STAC_READ | |
| 576 | (reg & EMAC_STACR_PRA_MASK) |
Eugene Surovegin | 7ad8a89 | 2005-10-29 12:43:14 -0700 | [diff] [blame] | 577 | | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) |
| 578 | | EMAC_STACR_START); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 580 | /* Wait for read to complete */ |
| 581 | n = 100; |
Eugene Surovegin | 7ad8a89 | 2005-10-29 12:43:14 -0700 | [diff] [blame] | 582 | while (!emac_phy_done(r = in_be32(&p->stacr))) { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 583 | udelay(1); |
| 584 | if (!--n) |
| 585 | goto to; |
| 586 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 588 | if (unlikely(r & EMAC_STACR_PHYE)) { |
| 589 | DBG("%d: mdio_read(%02x, %02x) failed" NL, dev->def->index, |
| 590 | id, reg); |
| 591 | return -EREMOTEIO; |
| 592 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 594 | r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK); |
| 595 | DBG2("%d: mdio_read -> %04x" NL, dev->def->index, r); |
| 596 | return r; |
| 597 | to: |
| 598 | DBG("%d: MII management interface timeout (read)" NL, dev->def->index); |
| 599 | return -ETIMEDOUT; |
| 600 | } |
| 601 | |
| 602 | static void __emac_mdio_write(struct ocp_enet_private *dev, u8 id, u8 reg, |
| 603 | u16 val) |
| 604 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 605 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 606 | int n; |
| 607 | |
| 608 | DBG2("%d: mdio_write(%02x,%02x,%04x)" NL, dev->def->index, id, reg, |
| 609 | val); |
| 610 | |
| 611 | /* Enable proper MDIO port */ |
| 612 | zmii_enable_mdio(dev->zmii_dev, dev->zmii_input); |
| 613 | |
| 614 | /* Wait for management interface to be idle */ |
| 615 | n = 10; |
Eugene Surovegin | 7ad8a89 | 2005-10-29 12:43:14 -0700 | [diff] [blame] | 616 | while (!emac_phy_done(in_be32(&p->stacr))) { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 617 | udelay(1); |
| 618 | if (!--n) |
| 619 | goto to; |
| 620 | } |
| 621 | |
| 622 | /* Issue write command */ |
| 623 | out_be32(&p->stacr, |
| 624 | EMAC_STACR_BASE(emac_opb_mhz()) | EMAC_STACR_STAC_WRITE | |
| 625 | (reg & EMAC_STACR_PRA_MASK) | |
| 626 | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) | |
Eugene Surovegin | 7ad8a89 | 2005-10-29 12:43:14 -0700 | [diff] [blame] | 627 | (val << EMAC_STACR_PHYD_SHIFT) | EMAC_STACR_START); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 628 | |
| 629 | /* Wait for write to complete */ |
| 630 | n = 100; |
Eugene Surovegin | 7ad8a89 | 2005-10-29 12:43:14 -0700 | [diff] [blame] | 631 | while (!emac_phy_done(in_be32(&p->stacr))) { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 632 | udelay(1); |
| 633 | if (!--n) |
| 634 | goto to; |
| 635 | } |
| 636 | return; |
| 637 | to: |
| 638 | DBG("%d: MII management interface timeout (write)" NL, dev->def->index); |
| 639 | } |
| 640 | |
| 641 | static int emac_mdio_read(struct net_device *ndev, int id, int reg) |
| 642 | { |
| 643 | struct ocp_enet_private *dev = ndev->priv; |
| 644 | int res; |
| 645 | |
| 646 | local_bh_disable(); |
| 647 | res = __emac_mdio_read(dev->mdio_dev ? dev->mdio_dev : dev, (u8) id, |
| 648 | (u8) reg); |
| 649 | local_bh_enable(); |
| 650 | return res; |
| 651 | } |
| 652 | |
| 653 | static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val) |
| 654 | { |
| 655 | struct ocp_enet_private *dev = ndev->priv; |
| 656 | |
| 657 | local_bh_disable(); |
| 658 | __emac_mdio_write(dev->mdio_dev ? dev->mdio_dev : dev, (u8) id, |
| 659 | (u8) reg, (u16) val); |
| 660 | local_bh_enable(); |
| 661 | } |
| 662 | |
| 663 | /* BHs disabled */ |
| 664 | static void emac_set_multicast_list(struct net_device *ndev) |
| 665 | { |
| 666 | struct ocp_enet_private *dev = ndev->priv; |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 667 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 668 | u32 rmr = emac_iff2rmr(ndev); |
| 669 | |
| 670 | DBG("%d: multicast %08x" NL, dev->def->index, rmr); |
| 671 | BUG_ON(!netif_running(dev->ndev)); |
| 672 | |
| 673 | /* I decided to relax register access rules here to avoid |
| 674 | * full EMAC reset. |
| 675 | * |
| 676 | * There is a real problem with EMAC4 core if we use MWSW_001 bit |
| 677 | * in MR1 register and do a full EMAC reset. |
| 678 | * One TX BD status update is delayed and, after EMAC reset, it |
| 679 | * never happens, resulting in TX hung (it'll be recovered by TX |
| 680 | * timeout handler eventually, but this is just gross). |
| 681 | * So we either have to do full TX reset or try to cheat here :) |
| 682 | * |
| 683 | * The only required change is to RX mode register, so I *think* all |
| 684 | * we need is just to stop RX channel. This seems to work on all |
| 685 | * tested SoCs. --ebs |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | */ |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 687 | emac_rx_disable(dev); |
| 688 | if (rmr & EMAC_RMR_MAE) |
| 689 | emac_hash_mc(dev); |
| 690 | out_be32(&p->rmr, rmr); |
| 691 | emac_rx_enable(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 692 | } |
| 693 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 694 | /* BHs disabled */ |
| 695 | static int emac_resize_rx_ring(struct ocp_enet_private *dev, int new_mtu) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 696 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 697 | struct ocp_func_emac_data *emacdata = dev->def->additions; |
| 698 | int rx_sync_size = emac_rx_sync_size(new_mtu); |
| 699 | int rx_skb_size = emac_rx_skb_size(new_mtu); |
| 700 | int i, ret = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 701 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 702 | emac_rx_disable(dev); |
| 703 | mal_disable_rx_channel(dev->mal, emacdata->mal_rx_chan); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 704 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 705 | if (dev->rx_sg_skb) { |
| 706 | ++dev->estats.rx_dropped_resize; |
| 707 | dev_kfree_skb(dev->rx_sg_skb); |
| 708 | dev->rx_sg_skb = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | } |
| 710 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 711 | /* Make a first pass over RX ring and mark BDs ready, dropping |
| 712 | * non-processed packets on the way. We need this as a separate pass |
| 713 | * to simplify error recovery in the case of allocation failure later. |
| 714 | */ |
| 715 | for (i = 0; i < NUM_RX_BUFF; ++i) { |
| 716 | if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST) |
| 717 | ++dev->estats.rx_dropped_resize; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 719 | dev->rx_desc[i].data_len = 0; |
| 720 | dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | |
| 721 | (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); |
| 722 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 724 | /* Reallocate RX ring only if bigger skb buffers are required */ |
| 725 | if (rx_skb_size <= dev->rx_skb_size) |
| 726 | goto skip; |
| 727 | |
| 728 | /* Second pass, allocate new skbs */ |
| 729 | for (i = 0; i < NUM_RX_BUFF; ++i) { |
| 730 | struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC); |
| 731 | if (!skb) { |
| 732 | ret = -ENOMEM; |
| 733 | goto oom; |
| 734 | } |
| 735 | |
| 736 | BUG_ON(!dev->rx_skb[i]); |
| 737 | dev_kfree_skb(dev->rx_skb[i]); |
| 738 | |
| 739 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); |
| 740 | dev->rx_desc[i].data_ptr = |
| 741 | dma_map_single(dev->ldev, skb->data - 2, rx_sync_size, |
| 742 | DMA_FROM_DEVICE) + 2; |
| 743 | dev->rx_skb[i] = skb; |
| 744 | } |
| 745 | skip: |
| 746 | /* Check if we need to change "Jumbo" bit in MR1 */ |
| 747 | if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) { |
| 748 | /* This is to prevent starting RX channel in emac_rx_enable() */ |
| 749 | dev->commac.rx_stopped = 1; |
| 750 | |
| 751 | dev->ndev->mtu = new_mtu; |
| 752 | emac_full_tx_reset(dev->ndev); |
| 753 | } |
| 754 | |
| 755 | mal_set_rcbs(dev->mal, emacdata->mal_rx_chan, emac_rx_size(new_mtu)); |
| 756 | oom: |
| 757 | /* Restart RX */ |
| 758 | dev->commac.rx_stopped = dev->rx_slot = 0; |
| 759 | mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan); |
| 760 | emac_rx_enable(dev); |
| 761 | |
| 762 | return ret; |
| 763 | } |
| 764 | |
| 765 | /* Process ctx, rtnl_lock semaphore */ |
| 766 | static int emac_change_mtu(struct net_device *ndev, int new_mtu) |
| 767 | { |
| 768 | struct ocp_enet_private *dev = ndev->priv; |
| 769 | int ret = 0; |
| 770 | |
| 771 | if (new_mtu < EMAC_MIN_MTU || new_mtu > EMAC_MAX_MTU) |
| 772 | return -EINVAL; |
| 773 | |
| 774 | DBG("%d: change_mtu(%d)" NL, dev->def->index, new_mtu); |
| 775 | |
| 776 | local_bh_disable(); |
| 777 | if (netif_running(ndev)) { |
| 778 | /* Check if we really need to reinitalize RX ring */ |
| 779 | if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu)) |
| 780 | ret = emac_resize_rx_ring(dev, new_mtu); |
| 781 | } |
| 782 | |
| 783 | if (!ret) { |
| 784 | ndev->mtu = new_mtu; |
| 785 | dev->rx_skb_size = emac_rx_skb_size(new_mtu); |
| 786 | dev->rx_sync_size = emac_rx_sync_size(new_mtu); |
| 787 | } |
| 788 | local_bh_enable(); |
| 789 | |
| 790 | return ret; |
| 791 | } |
| 792 | |
| 793 | static void emac_clean_tx_ring(struct ocp_enet_private *dev) |
| 794 | { |
| 795 | int i; |
| 796 | for (i = 0; i < NUM_TX_BUFF; ++i) { |
| 797 | if (dev->tx_skb[i]) { |
| 798 | dev_kfree_skb(dev->tx_skb[i]); |
| 799 | dev->tx_skb[i] = NULL; |
| 800 | if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY) |
| 801 | ++dev->estats.tx_dropped; |
| 802 | } |
| 803 | dev->tx_desc[i].ctrl = 0; |
| 804 | dev->tx_desc[i].data_ptr = 0; |
| 805 | } |
| 806 | } |
| 807 | |
| 808 | static void emac_clean_rx_ring(struct ocp_enet_private *dev) |
| 809 | { |
| 810 | int i; |
| 811 | for (i = 0; i < NUM_RX_BUFF; ++i) |
| 812 | if (dev->rx_skb[i]) { |
| 813 | dev->rx_desc[i].ctrl = 0; |
| 814 | dev_kfree_skb(dev->rx_skb[i]); |
| 815 | dev->rx_skb[i] = NULL; |
| 816 | dev->rx_desc[i].data_ptr = 0; |
| 817 | } |
| 818 | |
| 819 | if (dev->rx_sg_skb) { |
| 820 | dev_kfree_skb(dev->rx_sg_skb); |
| 821 | dev->rx_sg_skb = NULL; |
| 822 | } |
| 823 | } |
| 824 | |
| 825 | static inline int emac_alloc_rx_skb(struct ocp_enet_private *dev, int slot, |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 826 | gfp_t flags) |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 827 | { |
| 828 | struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags); |
| 829 | if (unlikely(!skb)) |
| 830 | return -ENOMEM; |
| 831 | |
| 832 | dev->rx_skb[slot] = skb; |
| 833 | dev->rx_desc[slot].data_len = 0; |
| 834 | |
| 835 | skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); |
| 836 | dev->rx_desc[slot].data_ptr = |
| 837 | dma_map_single(dev->ldev, skb->data - 2, dev->rx_sync_size, |
| 838 | DMA_FROM_DEVICE) + 2; |
| 839 | barrier(); |
| 840 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | |
| 841 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); |
| 842 | |
| 843 | return 0; |
| 844 | } |
| 845 | |
| 846 | static void emac_print_link_status(struct ocp_enet_private *dev) |
| 847 | { |
| 848 | if (netif_carrier_ok(dev->ndev)) |
| 849 | printk(KERN_INFO "%s: link is up, %d %s%s\n", |
| 850 | dev->ndev->name, dev->phy.speed, |
| 851 | dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX", |
| 852 | dev->phy.pause ? ", pause enabled" : |
| 853 | dev->phy.asym_pause ? ", assymetric pause enabled" : ""); |
| 854 | else |
| 855 | printk(KERN_INFO "%s: link is down\n", dev->ndev->name); |
| 856 | } |
| 857 | |
| 858 | /* Process ctx, rtnl_lock semaphore */ |
| 859 | static int emac_open(struct net_device *ndev) |
| 860 | { |
| 861 | struct ocp_enet_private *dev = ndev->priv; |
| 862 | struct ocp_func_emac_data *emacdata = dev->def->additions; |
| 863 | int err, i; |
| 864 | |
| 865 | DBG("%d: open" NL, dev->def->index); |
| 866 | |
| 867 | /* Setup error IRQ handler */ |
| 868 | err = request_irq(dev->def->irq, emac_irq, 0, "EMAC", dev); |
| 869 | if (err) { |
| 870 | printk(KERN_ERR "%s: failed to request IRQ %d\n", |
| 871 | ndev->name, dev->def->irq); |
| 872 | return err; |
| 873 | } |
| 874 | |
| 875 | /* Allocate RX ring */ |
| 876 | for (i = 0; i < NUM_RX_BUFF; ++i) |
| 877 | if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) { |
| 878 | printk(KERN_ERR "%s: failed to allocate RX ring\n", |
| 879 | ndev->name); |
| 880 | goto oom; |
| 881 | } |
| 882 | |
| 883 | local_bh_disable(); |
| 884 | dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = |
| 885 | dev->commac.rx_stopped = 0; |
| 886 | dev->rx_sg_skb = NULL; |
| 887 | |
| 888 | if (dev->phy.address >= 0) { |
| 889 | int link_poll_interval; |
| 890 | if (dev->phy.def->ops->poll_link(&dev->phy)) { |
| 891 | dev->phy.def->ops->read_link(&dev->phy); |
| 892 | EMAC_RX_CLK_DEFAULT(dev->def->index); |
| 893 | netif_carrier_on(dev->ndev); |
| 894 | link_poll_interval = PHY_POLL_LINK_ON; |
| 895 | } else { |
| 896 | EMAC_RX_CLK_TX(dev->def->index); |
| 897 | netif_carrier_off(dev->ndev); |
| 898 | link_poll_interval = PHY_POLL_LINK_OFF; |
| 899 | } |
| 900 | mod_timer(&dev->link_timer, jiffies + link_poll_interval); |
| 901 | emac_print_link_status(dev); |
| 902 | } else |
| 903 | netif_carrier_on(dev->ndev); |
| 904 | |
| 905 | emac_configure(dev); |
| 906 | mal_poll_add(dev->mal, &dev->commac); |
| 907 | mal_enable_tx_channel(dev->mal, emacdata->mal_tx_chan); |
| 908 | mal_set_rcbs(dev->mal, emacdata->mal_rx_chan, emac_rx_size(ndev->mtu)); |
| 909 | mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan); |
| 910 | emac_tx_enable(dev); |
| 911 | emac_rx_enable(dev); |
| 912 | netif_start_queue(ndev); |
| 913 | local_bh_enable(); |
| 914 | |
| 915 | return 0; |
| 916 | oom: |
| 917 | emac_clean_rx_ring(dev); |
| 918 | free_irq(dev->def->irq, dev); |
| 919 | return -ENOMEM; |
| 920 | } |
| 921 | |
| 922 | /* BHs disabled */ |
| 923 | static int emac_link_differs(struct ocp_enet_private *dev) |
| 924 | { |
| 925 | u32 r = in_be32(&dev->emacp->mr1); |
| 926 | |
| 927 | int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF; |
| 928 | int speed, pause, asym_pause; |
| 929 | |
| 930 | if (r & (EMAC_MR1_MF_1000 | EMAC_MR1_MF_1000GPCS)) |
| 931 | speed = SPEED_1000; |
| 932 | else if (r & EMAC_MR1_MF_100) |
| 933 | speed = SPEED_100; |
| 934 | else |
| 935 | speed = SPEED_10; |
| 936 | |
| 937 | switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) { |
| 938 | case (EMAC_MR1_EIFC | EMAC_MR1_APP): |
| 939 | pause = 1; |
| 940 | asym_pause = 0; |
| 941 | break; |
| 942 | case EMAC_MR1_APP: |
| 943 | pause = 0; |
| 944 | asym_pause = 1; |
| 945 | break; |
| 946 | default: |
| 947 | pause = asym_pause = 0; |
| 948 | } |
| 949 | return speed != dev->phy.speed || duplex != dev->phy.duplex || |
| 950 | pause != dev->phy.pause || asym_pause != dev->phy.asym_pause; |
| 951 | } |
| 952 | |
| 953 | /* BHs disabled */ |
| 954 | static void emac_link_timer(unsigned long data) |
| 955 | { |
| 956 | struct ocp_enet_private *dev = (struct ocp_enet_private *)data; |
| 957 | int link_poll_interval; |
| 958 | |
| 959 | DBG2("%d: link timer" NL, dev->def->index); |
| 960 | |
| 961 | if (dev->phy.def->ops->poll_link(&dev->phy)) { |
| 962 | if (!netif_carrier_ok(dev->ndev)) { |
| 963 | EMAC_RX_CLK_DEFAULT(dev->def->index); |
| 964 | |
| 965 | /* Get new link parameters */ |
| 966 | dev->phy.def->ops->read_link(&dev->phy); |
| 967 | |
| 968 | if (dev->tah_dev || emac_link_differs(dev)) |
| 969 | emac_full_tx_reset(dev->ndev); |
| 970 | |
| 971 | netif_carrier_on(dev->ndev); |
| 972 | emac_print_link_status(dev); |
| 973 | } |
| 974 | link_poll_interval = PHY_POLL_LINK_ON; |
| 975 | } else { |
| 976 | if (netif_carrier_ok(dev->ndev)) { |
| 977 | EMAC_RX_CLK_TX(dev->def->index); |
| 978 | #if defined(CONFIG_IBM_EMAC_PHY_RX_CLK_FIX) |
| 979 | emac_reinitialize(dev); |
| 980 | #endif |
| 981 | netif_carrier_off(dev->ndev); |
| 982 | emac_print_link_status(dev); |
| 983 | } |
| 984 | |
| 985 | /* Retry reset if the previous attempt failed. |
| 986 | * This is needed mostly for CONFIG_IBM_EMAC_PHY_RX_CLK_FIX |
| 987 | * case, but I left it here because it shouldn't trigger for |
| 988 | * sane PHYs anyway. |
| 989 | */ |
| 990 | if (unlikely(dev->reset_failed)) |
| 991 | emac_reinitialize(dev); |
| 992 | |
| 993 | link_poll_interval = PHY_POLL_LINK_OFF; |
| 994 | } |
| 995 | mod_timer(&dev->link_timer, jiffies + link_poll_interval); |
| 996 | } |
| 997 | |
| 998 | /* BHs disabled */ |
| 999 | static void emac_force_link_update(struct ocp_enet_private *dev) |
| 1000 | { |
| 1001 | netif_carrier_off(dev->ndev); |
| 1002 | if (timer_pending(&dev->link_timer)) |
| 1003 | mod_timer(&dev->link_timer, jiffies + PHY_POLL_LINK_OFF); |
| 1004 | } |
| 1005 | |
| 1006 | /* Process ctx, rtnl_lock semaphore */ |
| 1007 | static int emac_close(struct net_device *ndev) |
| 1008 | { |
| 1009 | struct ocp_enet_private *dev = ndev->priv; |
| 1010 | struct ocp_func_emac_data *emacdata = dev->def->additions; |
| 1011 | |
| 1012 | DBG("%d: close" NL, dev->def->index); |
| 1013 | |
| 1014 | local_bh_disable(); |
| 1015 | |
| 1016 | if (dev->phy.address >= 0) |
| 1017 | del_timer_sync(&dev->link_timer); |
| 1018 | |
| 1019 | netif_stop_queue(ndev); |
| 1020 | emac_rx_disable(dev); |
| 1021 | emac_tx_disable(dev); |
| 1022 | mal_disable_rx_channel(dev->mal, emacdata->mal_rx_chan); |
| 1023 | mal_disable_tx_channel(dev->mal, emacdata->mal_tx_chan); |
| 1024 | mal_poll_del(dev->mal, &dev->commac); |
| 1025 | local_bh_enable(); |
| 1026 | |
| 1027 | emac_clean_tx_ring(dev); |
| 1028 | emac_clean_rx_ring(dev); |
| 1029 | free_irq(dev->def->irq, dev); |
| 1030 | |
| 1031 | return 0; |
| 1032 | } |
| 1033 | |
| 1034 | static inline u16 emac_tx_csum(struct ocp_enet_private *dev, |
| 1035 | struct sk_buff *skb) |
| 1036 | { |
| 1037 | #if defined(CONFIG_IBM_EMAC_TAH) |
Patrick McHardy | 84fa793 | 2006-08-29 16:44:56 -0700 | [diff] [blame] | 1038 | if (skb->ip_summed == CHECKSUM_PARTIAL) { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1039 | ++dev->stats.tx_packets_csum; |
| 1040 | return EMAC_TX_CTRL_TAH_CSUM; |
| 1041 | } |
| 1042 | #endif |
| 1043 | return 0; |
| 1044 | } |
| 1045 | |
| 1046 | static inline int emac_xmit_finish(struct ocp_enet_private *dev, int len) |
| 1047 | { |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 1048 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1049 | struct net_device *ndev = dev->ndev; |
| 1050 | |
| 1051 | /* Send the packet out */ |
| 1052 | out_be32(&p->tmr0, EMAC_TMR0_XMIT); |
| 1053 | |
| 1054 | if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) { |
| 1055 | netif_stop_queue(ndev); |
| 1056 | DBG2("%d: stopped TX queue" NL, dev->def->index); |
| 1057 | } |
| 1058 | |
| 1059 | ndev->trans_start = jiffies; |
| 1060 | ++dev->stats.tx_packets; |
| 1061 | dev->stats.tx_bytes += len; |
| 1062 | |
| 1063 | return 0; |
| 1064 | } |
| 1065 | |
| 1066 | /* BHs disabled */ |
| 1067 | static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) |
| 1068 | { |
| 1069 | struct ocp_enet_private *dev = ndev->priv; |
| 1070 | unsigned int len = skb->len; |
| 1071 | int slot; |
| 1072 | |
| 1073 | u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | |
| 1074 | MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb); |
| 1075 | |
| 1076 | slot = dev->tx_slot++; |
| 1077 | if (dev->tx_slot == NUM_TX_BUFF) { |
| 1078 | dev->tx_slot = 0; |
| 1079 | ctrl |= MAL_TX_CTRL_WRAP; |
| 1080 | } |
| 1081 | |
| 1082 | DBG2("%d: xmit(%u) %d" NL, dev->def->index, len, slot); |
| 1083 | |
| 1084 | dev->tx_skb[slot] = skb; |
| 1085 | dev->tx_desc[slot].data_ptr = dma_map_single(dev->ldev, skb->data, len, |
| 1086 | DMA_TO_DEVICE); |
| 1087 | dev->tx_desc[slot].data_len = (u16) len; |
| 1088 | barrier(); |
| 1089 | dev->tx_desc[slot].ctrl = ctrl; |
| 1090 | |
| 1091 | return emac_xmit_finish(dev, len); |
| 1092 | } |
| 1093 | |
| 1094 | #if defined(CONFIG_IBM_EMAC_TAH) |
| 1095 | static inline int emac_xmit_split(struct ocp_enet_private *dev, int slot, |
| 1096 | u32 pd, int len, int last, u16 base_ctrl) |
| 1097 | { |
| 1098 | while (1) { |
| 1099 | u16 ctrl = base_ctrl; |
| 1100 | int chunk = min(len, MAL_MAX_TX_SIZE); |
| 1101 | len -= chunk; |
| 1102 | |
| 1103 | slot = (slot + 1) % NUM_TX_BUFF; |
| 1104 | |
| 1105 | if (last && !len) |
| 1106 | ctrl |= MAL_TX_CTRL_LAST; |
| 1107 | if (slot == NUM_TX_BUFF - 1) |
| 1108 | ctrl |= MAL_TX_CTRL_WRAP; |
| 1109 | |
| 1110 | dev->tx_skb[slot] = NULL; |
| 1111 | dev->tx_desc[slot].data_ptr = pd; |
| 1112 | dev->tx_desc[slot].data_len = (u16) chunk; |
| 1113 | dev->tx_desc[slot].ctrl = ctrl; |
| 1114 | ++dev->tx_cnt; |
| 1115 | |
| 1116 | if (!len) |
| 1117 | break; |
| 1118 | |
| 1119 | pd += chunk; |
| 1120 | } |
| 1121 | return slot; |
| 1122 | } |
| 1123 | |
| 1124 | /* BHs disabled (SG version for TAH equipped EMACs) */ |
| 1125 | static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) |
| 1126 | { |
| 1127 | struct ocp_enet_private *dev = ndev->priv; |
| 1128 | int nr_frags = skb_shinfo(skb)->nr_frags; |
| 1129 | int len = skb->len, chunk; |
| 1130 | int slot, i; |
| 1131 | u16 ctrl; |
| 1132 | u32 pd; |
| 1133 | |
| 1134 | /* This is common "fast" path */ |
| 1135 | if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE)) |
| 1136 | return emac_start_xmit(skb, ndev); |
| 1137 | |
| 1138 | len -= skb->data_len; |
| 1139 | |
| 1140 | /* Note, this is only an *estimation*, we can still run out of empty |
| 1141 | * slots because of the additional fragmentation into |
| 1142 | * MAL_MAX_TX_SIZE-sized chunks |
| 1143 | */ |
| 1144 | if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF)) |
| 1145 | goto stop_queue; |
| 1146 | |
| 1147 | ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | |
| 1148 | emac_tx_csum(dev, skb); |
| 1149 | slot = dev->tx_slot; |
| 1150 | |
| 1151 | /* skb data */ |
| 1152 | dev->tx_skb[slot] = NULL; |
| 1153 | chunk = min(len, MAL_MAX_TX_SIZE); |
| 1154 | dev->tx_desc[slot].data_ptr = pd = |
| 1155 | dma_map_single(dev->ldev, skb->data, len, DMA_TO_DEVICE); |
| 1156 | dev->tx_desc[slot].data_len = (u16) chunk; |
| 1157 | len -= chunk; |
| 1158 | if (unlikely(len)) |
| 1159 | slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags, |
| 1160 | ctrl); |
| 1161 | /* skb fragments */ |
| 1162 | for (i = 0; i < nr_frags; ++i) { |
| 1163 | struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; |
| 1164 | len = frag->size; |
| 1165 | |
| 1166 | if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF)) |
| 1167 | goto undo_frame; |
| 1168 | |
| 1169 | pd = dma_map_page(dev->ldev, frag->page, frag->page_offset, len, |
| 1170 | DMA_TO_DEVICE); |
| 1171 | |
| 1172 | slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1, |
| 1173 | ctrl); |
| 1174 | } |
| 1175 | |
| 1176 | DBG2("%d: xmit_sg(%u) %d - %d" NL, dev->def->index, skb->len, |
| 1177 | dev->tx_slot, slot); |
| 1178 | |
| 1179 | /* Attach skb to the last slot so we don't release it too early */ |
| 1180 | dev->tx_skb[slot] = skb; |
| 1181 | |
| 1182 | /* Send the packet out */ |
| 1183 | if (dev->tx_slot == NUM_TX_BUFF - 1) |
| 1184 | ctrl |= MAL_TX_CTRL_WRAP; |
| 1185 | barrier(); |
| 1186 | dev->tx_desc[dev->tx_slot].ctrl = ctrl; |
| 1187 | dev->tx_slot = (slot + 1) % NUM_TX_BUFF; |
| 1188 | |
| 1189 | return emac_xmit_finish(dev, skb->len); |
| 1190 | |
| 1191 | undo_frame: |
| 1192 | /* Well, too bad. Our previous estimation was overly optimistic. |
| 1193 | * Undo everything. |
| 1194 | */ |
| 1195 | while (slot != dev->tx_slot) { |
| 1196 | dev->tx_desc[slot].ctrl = 0; |
| 1197 | --dev->tx_cnt; |
| 1198 | if (--slot < 0) |
| 1199 | slot = NUM_TX_BUFF - 1; |
| 1200 | } |
| 1201 | ++dev->estats.tx_undo; |
| 1202 | |
| 1203 | stop_queue: |
| 1204 | netif_stop_queue(ndev); |
| 1205 | DBG2("%d: stopped TX queue" NL, dev->def->index); |
| 1206 | return 1; |
| 1207 | } |
| 1208 | #else |
| 1209 | # define emac_start_xmit_sg emac_start_xmit |
| 1210 | #endif /* !defined(CONFIG_IBM_EMAC_TAH) */ |
| 1211 | |
| 1212 | /* BHs disabled */ |
| 1213 | static void emac_parse_tx_error(struct ocp_enet_private *dev, u16 ctrl) |
| 1214 | { |
| 1215 | struct ibm_emac_error_stats *st = &dev->estats; |
| 1216 | DBG("%d: BD TX error %04x" NL, dev->def->index, ctrl); |
| 1217 | |
| 1218 | ++st->tx_bd_errors; |
| 1219 | if (ctrl & EMAC_TX_ST_BFCS) |
| 1220 | ++st->tx_bd_bad_fcs; |
| 1221 | if (ctrl & EMAC_TX_ST_LCS) |
| 1222 | ++st->tx_bd_carrier_loss; |
| 1223 | if (ctrl & EMAC_TX_ST_ED) |
| 1224 | ++st->tx_bd_excessive_deferral; |
| 1225 | if (ctrl & EMAC_TX_ST_EC) |
| 1226 | ++st->tx_bd_excessive_collisions; |
| 1227 | if (ctrl & EMAC_TX_ST_LC) |
| 1228 | ++st->tx_bd_late_collision; |
| 1229 | if (ctrl & EMAC_TX_ST_MC) |
| 1230 | ++st->tx_bd_multple_collisions; |
| 1231 | if (ctrl & EMAC_TX_ST_SC) |
| 1232 | ++st->tx_bd_single_collision; |
| 1233 | if (ctrl & EMAC_TX_ST_UR) |
| 1234 | ++st->tx_bd_underrun; |
| 1235 | if (ctrl & EMAC_TX_ST_SQE) |
| 1236 | ++st->tx_bd_sqe; |
| 1237 | } |
| 1238 | |
| 1239 | static void emac_poll_tx(void *param) |
| 1240 | { |
| 1241 | struct ocp_enet_private *dev = param; |
| 1242 | DBG2("%d: poll_tx, %d %d" NL, dev->def->index, dev->tx_cnt, |
| 1243 | dev->ack_slot); |
| 1244 | |
| 1245 | if (dev->tx_cnt) { |
| 1246 | u16 ctrl; |
| 1247 | int slot = dev->ack_slot, n = 0; |
| 1248 | again: |
| 1249 | ctrl = dev->tx_desc[slot].ctrl; |
| 1250 | if (!(ctrl & MAL_TX_CTRL_READY)) { |
| 1251 | struct sk_buff *skb = dev->tx_skb[slot]; |
| 1252 | ++n; |
| 1253 | |
| 1254 | if (skb) { |
| 1255 | dev_kfree_skb(skb); |
| 1256 | dev->tx_skb[slot] = NULL; |
| 1257 | } |
| 1258 | slot = (slot + 1) % NUM_TX_BUFF; |
| 1259 | |
| 1260 | if (unlikely(EMAC_IS_BAD_TX(ctrl))) |
| 1261 | emac_parse_tx_error(dev, ctrl); |
| 1262 | |
| 1263 | if (--dev->tx_cnt) |
| 1264 | goto again; |
| 1265 | } |
| 1266 | if (n) { |
| 1267 | dev->ack_slot = slot; |
| 1268 | if (netif_queue_stopped(dev->ndev) && |
| 1269 | dev->tx_cnt < EMAC_TX_WAKEUP_THRESH) |
| 1270 | netif_wake_queue(dev->ndev); |
| 1271 | |
| 1272 | DBG2("%d: tx %d pkts" NL, dev->def->index, n); |
| 1273 | } |
| 1274 | } |
| 1275 | } |
| 1276 | |
| 1277 | static inline void emac_recycle_rx_skb(struct ocp_enet_private *dev, int slot, |
| 1278 | int len) |
| 1279 | { |
| 1280 | struct sk_buff *skb = dev->rx_skb[slot]; |
| 1281 | DBG2("%d: recycle %d %d" NL, dev->def->index, slot, len); |
| 1282 | |
| 1283 | if (len) |
| 1284 | dma_map_single(dev->ldev, skb->data - 2, |
| 1285 | EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE); |
| 1286 | |
| 1287 | dev->rx_desc[slot].data_len = 0; |
| 1288 | barrier(); |
| 1289 | dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | |
| 1290 | (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); |
| 1291 | } |
| 1292 | |
| 1293 | static void emac_parse_rx_error(struct ocp_enet_private *dev, u16 ctrl) |
| 1294 | { |
| 1295 | struct ibm_emac_error_stats *st = &dev->estats; |
| 1296 | DBG("%d: BD RX error %04x" NL, dev->def->index, ctrl); |
| 1297 | |
| 1298 | ++st->rx_bd_errors; |
| 1299 | if (ctrl & EMAC_RX_ST_OE) |
| 1300 | ++st->rx_bd_overrun; |
| 1301 | if (ctrl & EMAC_RX_ST_BP) |
| 1302 | ++st->rx_bd_bad_packet; |
| 1303 | if (ctrl & EMAC_RX_ST_RP) |
| 1304 | ++st->rx_bd_runt_packet; |
| 1305 | if (ctrl & EMAC_RX_ST_SE) |
| 1306 | ++st->rx_bd_short_event; |
| 1307 | if (ctrl & EMAC_RX_ST_AE) |
| 1308 | ++st->rx_bd_alignment_error; |
| 1309 | if (ctrl & EMAC_RX_ST_BFCS) |
| 1310 | ++st->rx_bd_bad_fcs; |
| 1311 | if (ctrl & EMAC_RX_ST_PTL) |
| 1312 | ++st->rx_bd_packet_too_long; |
| 1313 | if (ctrl & EMAC_RX_ST_ORE) |
| 1314 | ++st->rx_bd_out_of_range; |
| 1315 | if (ctrl & EMAC_RX_ST_IRE) |
| 1316 | ++st->rx_bd_in_range; |
| 1317 | } |
| 1318 | |
| 1319 | static inline void emac_rx_csum(struct ocp_enet_private *dev, |
| 1320 | struct sk_buff *skb, u16 ctrl) |
| 1321 | { |
| 1322 | #if defined(CONFIG_IBM_EMAC_TAH) |
| 1323 | if (!ctrl && dev->tah_dev) { |
| 1324 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
| 1325 | ++dev->stats.rx_packets_csum; |
| 1326 | } |
| 1327 | #endif |
| 1328 | } |
| 1329 | |
| 1330 | static inline int emac_rx_sg_append(struct ocp_enet_private *dev, int slot) |
| 1331 | { |
| 1332 | if (likely(dev->rx_sg_skb != NULL)) { |
| 1333 | int len = dev->rx_desc[slot].data_len; |
| 1334 | int tot_len = dev->rx_sg_skb->len + len; |
| 1335 | |
| 1336 | if (unlikely(tot_len + 2 > dev->rx_skb_size)) { |
| 1337 | ++dev->estats.rx_dropped_mtu; |
| 1338 | dev_kfree_skb(dev->rx_sg_skb); |
| 1339 | dev->rx_sg_skb = NULL; |
| 1340 | } else { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame^] | 1341 | cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb), |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1342 | dev->rx_skb[slot]->data, len); |
| 1343 | skb_put(dev->rx_sg_skb, len); |
| 1344 | emac_recycle_rx_skb(dev, slot, len); |
| 1345 | return 0; |
| 1346 | } |
| 1347 | } |
| 1348 | emac_recycle_rx_skb(dev, slot, 0); |
| 1349 | return -1; |
| 1350 | } |
| 1351 | |
| 1352 | /* BHs disabled */ |
| 1353 | static int emac_poll_rx(void *param, int budget) |
| 1354 | { |
| 1355 | struct ocp_enet_private *dev = param; |
| 1356 | int slot = dev->rx_slot, received = 0; |
| 1357 | |
| 1358 | DBG2("%d: poll_rx(%d)" NL, dev->def->index, budget); |
| 1359 | |
| 1360 | again: |
| 1361 | while (budget > 0) { |
| 1362 | int len; |
| 1363 | struct sk_buff *skb; |
| 1364 | u16 ctrl = dev->rx_desc[slot].ctrl; |
| 1365 | |
| 1366 | if (ctrl & MAL_RX_CTRL_EMPTY) |
| 1367 | break; |
| 1368 | |
| 1369 | skb = dev->rx_skb[slot]; |
| 1370 | barrier(); |
| 1371 | len = dev->rx_desc[slot].data_len; |
| 1372 | |
| 1373 | if (unlikely(!MAL_IS_SINGLE_RX(ctrl))) |
| 1374 | goto sg; |
| 1375 | |
| 1376 | ctrl &= EMAC_BAD_RX_MASK; |
| 1377 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { |
| 1378 | emac_parse_rx_error(dev, ctrl); |
| 1379 | ++dev->estats.rx_dropped_error; |
| 1380 | emac_recycle_rx_skb(dev, slot, 0); |
| 1381 | len = 0; |
| 1382 | goto next; |
| 1383 | } |
| 1384 | |
| 1385 | if (len && len < EMAC_RX_COPY_THRESH) { |
| 1386 | struct sk_buff *copy_skb = |
| 1387 | alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC); |
| 1388 | if (unlikely(!copy_skb)) |
| 1389 | goto oom; |
| 1390 | |
| 1391 | skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2); |
| 1392 | cacheable_memcpy(copy_skb->data - 2, skb->data - 2, |
| 1393 | len + 2); |
| 1394 | emac_recycle_rx_skb(dev, slot, len); |
| 1395 | skb = copy_skb; |
| 1396 | } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) |
| 1397 | goto oom; |
| 1398 | |
| 1399 | skb_put(skb, len); |
| 1400 | push_packet: |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1401 | skb->protocol = eth_type_trans(skb, dev->ndev); |
| 1402 | emac_rx_csum(dev, skb, ctrl); |
| 1403 | |
| 1404 | if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) |
| 1405 | ++dev->estats.rx_dropped_stack; |
| 1406 | next: |
| 1407 | ++dev->stats.rx_packets; |
| 1408 | skip: |
| 1409 | dev->stats.rx_bytes += len; |
| 1410 | slot = (slot + 1) % NUM_RX_BUFF; |
| 1411 | --budget; |
| 1412 | ++received; |
| 1413 | continue; |
| 1414 | sg: |
| 1415 | if (ctrl & MAL_RX_CTRL_FIRST) { |
| 1416 | BUG_ON(dev->rx_sg_skb); |
| 1417 | if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) { |
| 1418 | DBG("%d: rx OOM %d" NL, dev->def->index, slot); |
| 1419 | ++dev->estats.rx_dropped_oom; |
| 1420 | emac_recycle_rx_skb(dev, slot, 0); |
| 1421 | } else { |
| 1422 | dev->rx_sg_skb = skb; |
| 1423 | skb_put(skb, len); |
| 1424 | } |
| 1425 | } else if (!emac_rx_sg_append(dev, slot) && |
| 1426 | (ctrl & MAL_RX_CTRL_LAST)) { |
| 1427 | |
| 1428 | skb = dev->rx_sg_skb; |
| 1429 | dev->rx_sg_skb = NULL; |
| 1430 | |
| 1431 | ctrl &= EMAC_BAD_RX_MASK; |
| 1432 | if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { |
| 1433 | emac_parse_rx_error(dev, ctrl); |
| 1434 | ++dev->estats.rx_dropped_error; |
| 1435 | dev_kfree_skb(skb); |
| 1436 | len = 0; |
| 1437 | } else |
| 1438 | goto push_packet; |
| 1439 | } |
| 1440 | goto skip; |
| 1441 | oom: |
| 1442 | DBG("%d: rx OOM %d" NL, dev->def->index, slot); |
| 1443 | /* Drop the packet and recycle skb */ |
| 1444 | ++dev->estats.rx_dropped_oom; |
| 1445 | emac_recycle_rx_skb(dev, slot, 0); |
| 1446 | goto next; |
| 1447 | } |
| 1448 | |
| 1449 | if (received) { |
| 1450 | DBG2("%d: rx %d BDs" NL, dev->def->index, received); |
| 1451 | dev->rx_slot = slot; |
| 1452 | } |
| 1453 | |
| 1454 | if (unlikely(budget && dev->commac.rx_stopped)) { |
| 1455 | struct ocp_func_emac_data *emacdata = dev->def->additions; |
| 1456 | |
| 1457 | barrier(); |
| 1458 | if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) { |
| 1459 | DBG2("%d: rx restart" NL, dev->def->index); |
| 1460 | received = 0; |
| 1461 | goto again; |
| 1462 | } |
| 1463 | |
| 1464 | if (dev->rx_sg_skb) { |
| 1465 | DBG2("%d: dropping partial rx packet" NL, |
| 1466 | dev->def->index); |
| 1467 | ++dev->estats.rx_dropped_error; |
| 1468 | dev_kfree_skb(dev->rx_sg_skb); |
| 1469 | dev->rx_sg_skb = NULL; |
| 1470 | } |
| 1471 | |
| 1472 | dev->commac.rx_stopped = 0; |
| 1473 | mal_enable_rx_channel(dev->mal, emacdata->mal_rx_chan); |
| 1474 | emac_rx_enable(dev); |
| 1475 | dev->rx_slot = 0; |
| 1476 | } |
| 1477 | return received; |
| 1478 | } |
| 1479 | |
| 1480 | /* BHs disabled */ |
| 1481 | static int emac_peek_rx(void *param) |
| 1482 | { |
| 1483 | struct ocp_enet_private *dev = param; |
| 1484 | return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY); |
| 1485 | } |
| 1486 | |
| 1487 | /* BHs disabled */ |
| 1488 | static int emac_peek_rx_sg(void *param) |
| 1489 | { |
| 1490 | struct ocp_enet_private *dev = param; |
| 1491 | int slot = dev->rx_slot; |
| 1492 | while (1) { |
| 1493 | u16 ctrl = dev->rx_desc[slot].ctrl; |
| 1494 | if (ctrl & MAL_RX_CTRL_EMPTY) |
| 1495 | return 0; |
| 1496 | else if (ctrl & MAL_RX_CTRL_LAST) |
| 1497 | return 1; |
| 1498 | |
| 1499 | slot = (slot + 1) % NUM_RX_BUFF; |
| 1500 | |
| 1501 | /* I'm just being paranoid here :) */ |
| 1502 | if (unlikely(slot == dev->rx_slot)) |
| 1503 | return 0; |
| 1504 | } |
| 1505 | } |
| 1506 | |
| 1507 | /* Hard IRQ */ |
| 1508 | static void emac_rxde(void *param) |
| 1509 | { |
| 1510 | struct ocp_enet_private *dev = param; |
| 1511 | ++dev->estats.rx_stopped; |
| 1512 | emac_rx_disable_async(dev); |
| 1513 | } |
| 1514 | |
| 1515 | /* Hard IRQ */ |
David Howells | 7d12e78 | 2006-10-05 14:55:46 +0100 | [diff] [blame] | 1516 | static irqreturn_t emac_irq(int irq, void *dev_instance) |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1517 | { |
| 1518 | struct ocp_enet_private *dev = dev_instance; |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 1519 | struct emac_regs __iomem *p = dev->emacp; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1520 | struct ibm_emac_error_stats *st = &dev->estats; |
| 1521 | |
| 1522 | u32 isr = in_be32(&p->isr); |
| 1523 | out_be32(&p->isr, isr); |
| 1524 | |
| 1525 | DBG("%d: isr = %08x" NL, dev->def->index, isr); |
| 1526 | |
| 1527 | if (isr & EMAC_ISR_TXPE) |
| 1528 | ++st->tx_parity; |
| 1529 | if (isr & EMAC_ISR_RXPE) |
| 1530 | ++st->rx_parity; |
| 1531 | if (isr & EMAC_ISR_TXUE) |
| 1532 | ++st->tx_underrun; |
| 1533 | if (isr & EMAC_ISR_RXOE) |
| 1534 | ++st->rx_fifo_overrun; |
| 1535 | if (isr & EMAC_ISR_OVR) |
| 1536 | ++st->rx_overrun; |
| 1537 | if (isr & EMAC_ISR_BP) |
| 1538 | ++st->rx_bad_packet; |
| 1539 | if (isr & EMAC_ISR_RP) |
| 1540 | ++st->rx_runt_packet; |
| 1541 | if (isr & EMAC_ISR_SE) |
| 1542 | ++st->rx_short_event; |
| 1543 | if (isr & EMAC_ISR_ALE) |
| 1544 | ++st->rx_alignment_error; |
| 1545 | if (isr & EMAC_ISR_BFCS) |
| 1546 | ++st->rx_bad_fcs; |
| 1547 | if (isr & EMAC_ISR_PTLE) |
| 1548 | ++st->rx_packet_too_long; |
| 1549 | if (isr & EMAC_ISR_ORE) |
| 1550 | ++st->rx_out_of_range; |
| 1551 | if (isr & EMAC_ISR_IRE) |
| 1552 | ++st->rx_in_range; |
| 1553 | if (isr & EMAC_ISR_SQE) |
| 1554 | ++st->tx_sqe; |
| 1555 | if (isr & EMAC_ISR_TE) |
| 1556 | ++st->tx_errors; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1557 | |
| 1558 | return IRQ_HANDLED; |
| 1559 | } |
| 1560 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1561 | static struct net_device_stats *emac_stats(struct net_device *ndev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1563 | struct ocp_enet_private *dev = ndev->priv; |
| 1564 | struct ibm_emac_stats *st = &dev->stats; |
| 1565 | struct ibm_emac_error_stats *est = &dev->estats; |
| 1566 | struct net_device_stats *nst = &dev->nstats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1567 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1568 | DBG2("%d: stats" NL, dev->def->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1570 | /* Compute "legacy" statistics */ |
| 1571 | local_irq_disable(); |
| 1572 | nst->rx_packets = (unsigned long)st->rx_packets; |
| 1573 | nst->rx_bytes = (unsigned long)st->rx_bytes; |
| 1574 | nst->tx_packets = (unsigned long)st->tx_packets; |
| 1575 | nst->tx_bytes = (unsigned long)st->tx_bytes; |
| 1576 | nst->rx_dropped = (unsigned long)(est->rx_dropped_oom + |
| 1577 | est->rx_dropped_error + |
| 1578 | est->rx_dropped_resize + |
| 1579 | est->rx_dropped_mtu); |
| 1580 | nst->tx_dropped = (unsigned long)est->tx_dropped; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1582 | nst->rx_errors = (unsigned long)est->rx_bd_errors; |
| 1583 | nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun + |
| 1584 | est->rx_fifo_overrun + |
| 1585 | est->rx_overrun); |
| 1586 | nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error + |
| 1587 | est->rx_alignment_error); |
| 1588 | nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs + |
| 1589 | est->rx_bad_fcs); |
| 1590 | nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet + |
| 1591 | est->rx_bd_short_event + |
| 1592 | est->rx_bd_packet_too_long + |
| 1593 | est->rx_bd_out_of_range + |
| 1594 | est->rx_bd_in_range + |
| 1595 | est->rx_runt_packet + |
| 1596 | est->rx_short_event + |
| 1597 | est->rx_packet_too_long + |
| 1598 | est->rx_out_of_range + |
| 1599 | est->rx_in_range); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1601 | nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors); |
| 1602 | nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun + |
| 1603 | est->tx_underrun); |
| 1604 | nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss; |
| 1605 | nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral + |
| 1606 | est->tx_bd_excessive_collisions + |
| 1607 | est->tx_bd_late_collision + |
| 1608 | est->tx_bd_multple_collisions); |
| 1609 | local_irq_enable(); |
| 1610 | return nst; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1611 | } |
| 1612 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1613 | static void emac_remove(struct ocp_device *ocpdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1615 | struct ocp_enet_private *dev = ocp_get_drvdata(ocpdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1616 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1617 | DBG("%d: remove" NL, dev->def->index); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1618 | |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 1619 | ocp_set_drvdata(ocpdev, NULL); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1620 | unregister_netdev(dev->ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1622 | tah_fini(dev->tah_dev); |
| 1623 | rgmii_fini(dev->rgmii_dev, dev->rgmii_input); |
| 1624 | zmii_fini(dev->zmii_dev, dev->zmii_input); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1625 | |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 1626 | emac_dbg_register(dev->def->index, NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1627 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1628 | mal_unregister_commac(dev->mal, &dev->commac); |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 1629 | iounmap(dev->emacp); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1630 | kfree(dev->ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1631 | } |
| 1632 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1633 | static struct mal_commac_ops emac_commac_ops = { |
| 1634 | .poll_tx = &emac_poll_tx, |
| 1635 | .poll_rx = &emac_poll_rx, |
| 1636 | .peek_rx = &emac_peek_rx, |
| 1637 | .rxde = &emac_rxde, |
| 1638 | }; |
| 1639 | |
| 1640 | static struct mal_commac_ops emac_commac_sg_ops = { |
| 1641 | .poll_tx = &emac_poll_tx, |
| 1642 | .poll_rx = &emac_poll_rx, |
| 1643 | .peek_rx = &emac_peek_rx_sg, |
| 1644 | .rxde = &emac_rxde, |
| 1645 | }; |
| 1646 | |
| 1647 | /* Ethtool support */ |
| 1648 | static int emac_ethtool_get_settings(struct net_device *ndev, |
| 1649 | struct ethtool_cmd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1651 | struct ocp_enet_private *dev = ndev->priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1652 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1653 | cmd->supported = dev->phy.features; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1654 | cmd->port = PORT_MII; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1655 | cmd->phy_address = dev->phy.address; |
| 1656 | cmd->transceiver = |
| 1657 | dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL; |
| 1658 | |
| 1659 | local_bh_disable(); |
| 1660 | cmd->advertising = dev->phy.advertising; |
| 1661 | cmd->autoneg = dev->phy.autoneg; |
| 1662 | cmd->speed = dev->phy.speed; |
| 1663 | cmd->duplex = dev->phy.duplex; |
| 1664 | local_bh_enable(); |
| 1665 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | return 0; |
| 1667 | } |
| 1668 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1669 | static int emac_ethtool_set_settings(struct net_device *ndev, |
| 1670 | struct ethtool_cmd *cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1672 | struct ocp_enet_private *dev = ndev->priv; |
| 1673 | u32 f = dev->phy.features; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1674 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1675 | DBG("%d: set_settings(%d, %d, %d, 0x%08x)" NL, dev->def->index, |
| 1676 | cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1678 | /* Basic sanity checks */ |
| 1679 | if (dev->phy.address < 0) |
| 1680 | return -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1681 | if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) |
| 1682 | return -EINVAL; |
| 1683 | if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) |
| 1684 | return -EINVAL; |
| 1685 | if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) |
| 1686 | return -EINVAL; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1687 | |
| 1688 | if (cmd->autoneg == AUTONEG_DISABLE) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | switch (cmd->speed) { |
| 1690 | case SPEED_10: |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1691 | if (cmd->duplex == DUPLEX_HALF |
| 1692 | && !(f & SUPPORTED_10baseT_Half)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | return -EINVAL; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1694 | if (cmd->duplex == DUPLEX_FULL |
| 1695 | && !(f & SUPPORTED_10baseT_Full)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1696 | return -EINVAL; |
| 1697 | break; |
| 1698 | case SPEED_100: |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1699 | if (cmd->duplex == DUPLEX_HALF |
| 1700 | && !(f & SUPPORTED_100baseT_Half)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | return -EINVAL; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1702 | if (cmd->duplex == DUPLEX_FULL |
| 1703 | && !(f & SUPPORTED_100baseT_Full)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | return -EINVAL; |
| 1705 | break; |
| 1706 | case SPEED_1000: |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1707 | if (cmd->duplex == DUPLEX_HALF |
| 1708 | && !(f & SUPPORTED_1000baseT_Half)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1709 | return -EINVAL; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1710 | if (cmd->duplex == DUPLEX_FULL |
| 1711 | && !(f & SUPPORTED_1000baseT_Full)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1712 | return -EINVAL; |
| 1713 | break; |
| 1714 | default: |
| 1715 | return -EINVAL; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1716 | } |
| 1717 | |
| 1718 | local_bh_disable(); |
| 1719 | dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed, |
| 1720 | cmd->duplex); |
| 1721 | |
| 1722 | } else { |
| 1723 | if (!(f & SUPPORTED_Autoneg)) |
| 1724 | return -EINVAL; |
| 1725 | |
| 1726 | local_bh_disable(); |
| 1727 | dev->phy.def->ops->setup_aneg(&dev->phy, |
| 1728 | (cmd->advertising & f) | |
| 1729 | (dev->phy.advertising & |
| 1730 | (ADVERTISED_Pause | |
| 1731 | ADVERTISED_Asym_Pause))); |
| 1732 | } |
| 1733 | emac_force_link_update(dev); |
| 1734 | local_bh_enable(); |
| 1735 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1736 | return 0; |
| 1737 | } |
| 1738 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1739 | static void emac_ethtool_get_ringparam(struct net_device *ndev, |
| 1740 | struct ethtool_ringparam *rp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1741 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1742 | rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF; |
| 1743 | rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF; |
| 1744 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1745 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1746 | static void emac_ethtool_get_pauseparam(struct net_device *ndev, |
| 1747 | struct ethtool_pauseparam *pp) |
| 1748 | { |
| 1749 | struct ocp_enet_private *dev = ndev->priv; |
| 1750 | |
| 1751 | local_bh_disable(); |
| 1752 | if ((dev->phy.features & SUPPORTED_Autoneg) && |
| 1753 | (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause))) |
| 1754 | pp->autoneg = 1; |
| 1755 | |
| 1756 | if (dev->phy.duplex == DUPLEX_FULL) { |
| 1757 | if (dev->phy.pause) |
| 1758 | pp->rx_pause = pp->tx_pause = 1; |
| 1759 | else if (dev->phy.asym_pause) |
| 1760 | pp->tx_pause = 1; |
| 1761 | } |
| 1762 | local_bh_enable(); |
| 1763 | } |
| 1764 | |
| 1765 | static u32 emac_ethtool_get_rx_csum(struct net_device *ndev) |
| 1766 | { |
| 1767 | struct ocp_enet_private *dev = ndev->priv; |
| 1768 | return dev->tah_dev != 0; |
| 1769 | } |
| 1770 | |
| 1771 | static int emac_get_regs_len(struct ocp_enet_private *dev) |
| 1772 | { |
| 1773 | return sizeof(struct emac_ethtool_regs_subhdr) + EMAC_ETHTOOL_REGS_SIZE; |
| 1774 | } |
| 1775 | |
| 1776 | static int emac_ethtool_get_regs_len(struct net_device *ndev) |
| 1777 | { |
| 1778 | struct ocp_enet_private *dev = ndev->priv; |
| 1779 | return sizeof(struct emac_ethtool_regs_hdr) + |
| 1780 | emac_get_regs_len(dev) + mal_get_regs_len(dev->mal) + |
| 1781 | zmii_get_regs_len(dev->zmii_dev) + |
| 1782 | rgmii_get_regs_len(dev->rgmii_dev) + |
| 1783 | tah_get_regs_len(dev->tah_dev); |
| 1784 | } |
| 1785 | |
| 1786 | static void *emac_dump_regs(struct ocp_enet_private *dev, void *buf) |
| 1787 | { |
| 1788 | struct emac_ethtool_regs_subhdr *hdr = buf; |
| 1789 | |
| 1790 | hdr->version = EMAC_ETHTOOL_REGS_VER; |
| 1791 | hdr->index = dev->def->index; |
| 1792 | memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE); |
| 1793 | return ((void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE); |
| 1794 | } |
| 1795 | |
| 1796 | static void emac_ethtool_get_regs(struct net_device *ndev, |
| 1797 | struct ethtool_regs *regs, void *buf) |
| 1798 | { |
| 1799 | struct ocp_enet_private *dev = ndev->priv; |
| 1800 | struct emac_ethtool_regs_hdr *hdr = buf; |
| 1801 | |
| 1802 | hdr->components = 0; |
| 1803 | buf = hdr + 1; |
| 1804 | |
| 1805 | local_irq_disable(); |
| 1806 | buf = mal_dump_regs(dev->mal, buf); |
| 1807 | buf = emac_dump_regs(dev, buf); |
| 1808 | if (dev->zmii_dev) { |
| 1809 | hdr->components |= EMAC_ETHTOOL_REGS_ZMII; |
| 1810 | buf = zmii_dump_regs(dev->zmii_dev, buf); |
| 1811 | } |
| 1812 | if (dev->rgmii_dev) { |
| 1813 | hdr->components |= EMAC_ETHTOOL_REGS_RGMII; |
| 1814 | buf = rgmii_dump_regs(dev->rgmii_dev, buf); |
| 1815 | } |
| 1816 | if (dev->tah_dev) { |
| 1817 | hdr->components |= EMAC_ETHTOOL_REGS_TAH; |
| 1818 | buf = tah_dump_regs(dev->tah_dev, buf); |
| 1819 | } |
| 1820 | local_irq_enable(); |
| 1821 | } |
| 1822 | |
| 1823 | static int emac_ethtool_nway_reset(struct net_device *ndev) |
| 1824 | { |
| 1825 | struct ocp_enet_private *dev = ndev->priv; |
| 1826 | int res = 0; |
| 1827 | |
| 1828 | DBG("%d: nway_reset" NL, dev->def->index); |
| 1829 | |
| 1830 | if (dev->phy.address < 0) |
| 1831 | return -EOPNOTSUPP; |
| 1832 | |
| 1833 | local_bh_disable(); |
| 1834 | if (!dev->phy.autoneg) { |
| 1835 | res = -EINVAL; |
| 1836 | goto out; |
| 1837 | } |
| 1838 | |
| 1839 | dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising); |
| 1840 | emac_force_link_update(dev); |
| 1841 | |
| 1842 | out: |
| 1843 | local_bh_enable(); |
| 1844 | return res; |
| 1845 | } |
| 1846 | |
| 1847 | static int emac_ethtool_get_stats_count(struct net_device *ndev) |
| 1848 | { |
| 1849 | return EMAC_ETHTOOL_STATS_COUNT; |
| 1850 | } |
| 1851 | |
| 1852 | static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset, |
| 1853 | u8 * buf) |
| 1854 | { |
| 1855 | if (stringset == ETH_SS_STATS) |
| 1856 | memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys)); |
| 1857 | } |
| 1858 | |
| 1859 | static void emac_ethtool_get_ethtool_stats(struct net_device *ndev, |
| 1860 | struct ethtool_stats *estats, |
| 1861 | u64 * tmp_stats) |
| 1862 | { |
| 1863 | struct ocp_enet_private *dev = ndev->priv; |
| 1864 | local_irq_disable(); |
| 1865 | memcpy(tmp_stats, &dev->stats, sizeof(dev->stats)); |
| 1866 | tmp_stats += sizeof(dev->stats) / sizeof(u64); |
| 1867 | memcpy(tmp_stats, &dev->estats, sizeof(dev->estats)); |
| 1868 | local_irq_enable(); |
| 1869 | } |
| 1870 | |
| 1871 | static void emac_ethtool_get_drvinfo(struct net_device *ndev, |
| 1872 | struct ethtool_drvinfo *info) |
| 1873 | { |
| 1874 | struct ocp_enet_private *dev = ndev->priv; |
| 1875 | |
| 1876 | strcpy(info->driver, "ibm_emac"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1877 | strcpy(info->version, DRV_VERSION); |
| 1878 | info->fw_version[0] = '\0'; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1879 | sprintf(info->bus_info, "PPC 4xx EMAC %d", dev->def->index); |
| 1880 | info->n_stats = emac_ethtool_get_stats_count(ndev); |
| 1881 | info->regdump_len = emac_ethtool_get_regs_len(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1882 | } |
| 1883 | |
Jeff Garzik | 7282d49 | 2006-09-13 14:30:00 -0400 | [diff] [blame] | 1884 | static const struct ethtool_ops emac_ethtool_ops = { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1885 | .get_settings = emac_ethtool_get_settings, |
| 1886 | .set_settings = emac_ethtool_set_settings, |
| 1887 | .get_drvinfo = emac_ethtool_get_drvinfo, |
| 1888 | |
| 1889 | .get_regs_len = emac_ethtool_get_regs_len, |
| 1890 | .get_regs = emac_ethtool_get_regs, |
| 1891 | |
| 1892 | .nway_reset = emac_ethtool_nway_reset, |
| 1893 | |
| 1894 | .get_ringparam = emac_ethtool_get_ringparam, |
| 1895 | .get_pauseparam = emac_ethtool_get_pauseparam, |
| 1896 | |
| 1897 | .get_rx_csum = emac_ethtool_get_rx_csum, |
| 1898 | |
| 1899 | .get_strings = emac_ethtool_get_strings, |
| 1900 | .get_stats_count = emac_ethtool_get_stats_count, |
| 1901 | .get_ethtool_stats = emac_ethtool_get_ethtool_stats, |
| 1902 | |
| 1903 | .get_link = ethtool_op_get_link, |
| 1904 | .get_tx_csum = ethtool_op_get_tx_csum, |
| 1905 | .get_sg = ethtool_op_get_sg, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | }; |
| 1907 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1908 | static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1909 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1910 | struct ocp_enet_private *dev = ndev->priv; |
Geoff Levand | 9971869 | 2005-04-14 11:20:32 -0700 | [diff] [blame] | 1911 | uint16_t *data = (uint16_t *) & rq->ifr_ifru; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1912 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1913 | DBG("%d: ioctl %08x" NL, dev->def->index, cmd); |
| 1914 | |
| 1915 | if (dev->phy.address < 0) |
| 1916 | return -EOPNOTSUPP; |
| 1917 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1918 | switch (cmd) { |
| 1919 | case SIOCGMIIPHY: |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1920 | case SIOCDEVPRIVATE: |
| 1921 | data[0] = dev->phy.address; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1922 | /* Fall through */ |
| 1923 | case SIOCGMIIREG: |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1924 | case SIOCDEVPRIVATE + 1: |
| 1925 | data[3] = emac_mdio_read(ndev, dev->phy.address, data[1]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | return 0; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1927 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1928 | case SIOCSMIIREG: |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1929 | case SIOCDEVPRIVATE + 2: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1930 | if (!capable(CAP_NET_ADMIN)) |
| 1931 | return -EPERM; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1932 | emac_mdio_write(ndev, dev->phy.address, data[1], data[2]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1933 | return 0; |
| 1934 | default: |
| 1935 | return -EOPNOTSUPP; |
| 1936 | } |
| 1937 | } |
| 1938 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1939 | static int __init emac_probe(struct ocp_device *ocpdev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1940 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1941 | struct ocp_func_emac_data *emacdata = ocpdev->def->additions; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1942 | struct net_device *ndev; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1943 | struct ocp_device *maldev; |
| 1944 | struct ocp_enet_private *dev; |
| 1945 | int err, i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1946 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1947 | DBG("%d: probe" NL, ocpdev->def->index); |
| 1948 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1949 | if (!emacdata) { |
| 1950 | printk(KERN_ERR "emac%d: Missing additional data!\n", |
| 1951 | ocpdev->def->index); |
| 1952 | return -ENODEV; |
| 1953 | } |
| 1954 | |
| 1955 | /* Allocate our net_device structure */ |
| 1956 | ndev = alloc_etherdev(sizeof(struct ocp_enet_private)); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1957 | if (!ndev) { |
| 1958 | printk(KERN_ERR "emac%d: could not allocate ethernet device!\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1959 | ocpdev->def->index); |
| 1960 | return -ENOMEM; |
| 1961 | } |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 1962 | dev = ndev->priv; |
| 1963 | dev->ndev = ndev; |
| 1964 | dev->ldev = &ocpdev->dev; |
| 1965 | dev->def = ocpdev->def; |
| 1966 | SET_MODULE_OWNER(ndev); |
| 1967 | |
| 1968 | /* Find MAL device we are connected to */ |
| 1969 | maldev = |
| 1970 | ocp_find_device(OCP_VENDOR_IBM, OCP_FUNC_MAL, emacdata->mal_idx); |
| 1971 | if (!maldev) { |
| 1972 | printk(KERN_ERR "emac%d: unknown mal%d device!\n", |
| 1973 | dev->def->index, emacdata->mal_idx); |
| 1974 | err = -ENODEV; |
| 1975 | goto out; |
| 1976 | } |
| 1977 | dev->mal = ocp_get_drvdata(maldev); |
| 1978 | if (!dev->mal) { |
| 1979 | printk(KERN_ERR "emac%d: mal%d hasn't been initialized yet!\n", |
| 1980 | dev->def->index, emacdata->mal_idx); |
| 1981 | err = -ENODEV; |
| 1982 | goto out; |
| 1983 | } |
| 1984 | |
| 1985 | /* Register with MAL */ |
| 1986 | dev->commac.ops = &emac_commac_ops; |
| 1987 | dev->commac.dev = dev; |
| 1988 | dev->commac.tx_chan_mask = MAL_CHAN_MASK(emacdata->mal_tx_chan); |
| 1989 | dev->commac.rx_chan_mask = MAL_CHAN_MASK(emacdata->mal_rx_chan); |
| 1990 | err = mal_register_commac(dev->mal, &dev->commac); |
| 1991 | if (err) { |
| 1992 | printk(KERN_ERR "emac%d: failed to register with mal%d!\n", |
| 1993 | dev->def->index, emacdata->mal_idx); |
| 1994 | goto out; |
| 1995 | } |
| 1996 | dev->rx_skb_size = emac_rx_skb_size(ndev->mtu); |
| 1997 | dev->rx_sync_size = emac_rx_sync_size(ndev->mtu); |
| 1998 | |
| 1999 | /* Get pointers to BD rings */ |
| 2000 | dev->tx_desc = |
| 2001 | dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, |
| 2002 | emacdata->mal_tx_chan); |
| 2003 | dev->rx_desc = |
| 2004 | dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, |
| 2005 | emacdata->mal_rx_chan); |
| 2006 | |
| 2007 | DBG("%d: tx_desc %p" NL, ocpdev->def->index, dev->tx_desc); |
| 2008 | DBG("%d: rx_desc %p" NL, ocpdev->def->index, dev->rx_desc); |
| 2009 | |
| 2010 | /* Clean rings */ |
| 2011 | memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor)); |
| 2012 | memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor)); |
| 2013 | |
| 2014 | /* If we depend on another EMAC for MDIO, check whether it was probed already */ |
| 2015 | if (emacdata->mdio_idx >= 0 && emacdata->mdio_idx != ocpdev->def->index) { |
| 2016 | struct ocp_device *mdiodev = |
| 2017 | ocp_find_device(OCP_VENDOR_IBM, OCP_FUNC_EMAC, |
| 2018 | emacdata->mdio_idx); |
| 2019 | if (!mdiodev) { |
| 2020 | printk(KERN_ERR "emac%d: unknown emac%d device!\n", |
| 2021 | dev->def->index, emacdata->mdio_idx); |
| 2022 | err = -ENODEV; |
| 2023 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | } |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2025 | dev->mdio_dev = ocp_get_drvdata(mdiodev); |
| 2026 | if (!dev->mdio_dev) { |
| 2027 | printk(KERN_ERR |
| 2028 | "emac%d: emac%d hasn't been initialized yet!\n", |
| 2029 | dev->def->index, emacdata->mdio_idx); |
| 2030 | err = -ENODEV; |
| 2031 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | } |
| 2033 | } |
| 2034 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2035 | /* Attach to ZMII, if needed */ |
| 2036 | if ((err = zmii_attach(dev)) != 0) |
| 2037 | goto out2; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2038 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2039 | /* Attach to RGMII, if needed */ |
| 2040 | if ((err = rgmii_attach(dev)) != 0) |
| 2041 | goto out3; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2043 | /* Attach to TAH, if needed */ |
| 2044 | if ((err = tah_attach(dev)) != 0) |
| 2045 | goto out4; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2046 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2047 | /* Map EMAC regs */ |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 2048 | dev->emacp = ioremap(dev->def->paddr, sizeof(struct emac_regs)); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2049 | if (!dev->emacp) { |
| 2050 | printk(KERN_ERR "emac%d: could not ioremap device registers!\n", |
| 2051 | dev->def->index); |
| 2052 | err = -ENOMEM; |
| 2053 | goto out5; |
Wade Farnsworth | 49a9db0 | 2005-10-03 22:21:33 -0400 | [diff] [blame] | 2054 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2055 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2056 | /* Fill in MAC address */ |
| 2057 | for (i = 0; i < 6; ++i) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2058 | ndev->dev_addr[i] = emacdata->mac_addr[i]; |
| 2059 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2060 | /* Set some link defaults before we can find out real parameters */ |
| 2061 | dev->phy.speed = SPEED_100; |
| 2062 | dev->phy.duplex = DUPLEX_FULL; |
| 2063 | dev->phy.autoneg = AUTONEG_DISABLE; |
| 2064 | dev->phy.pause = dev->phy.asym_pause = 0; |
Eugene Surovegin | 8169bd919 | 2005-11-24 14:48:40 -0800 | [diff] [blame] | 2065 | dev->stop_timeout = STOP_TIMEOUT_100; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2066 | init_timer(&dev->link_timer); |
| 2067 | dev->link_timer.function = emac_link_timer; |
| 2068 | dev->link_timer.data = (unsigned long)dev; |
| 2069 | |
| 2070 | /* Find PHY if any */ |
| 2071 | dev->phy.dev = ndev; |
| 2072 | dev->phy.mode = emacdata->phy_mode; |
| 2073 | if (emacdata->phy_map != 0xffffffff) { |
| 2074 | u32 phy_map = emacdata->phy_map | busy_phy_map; |
| 2075 | u32 adv; |
| 2076 | |
| 2077 | DBG("%d: PHY maps %08x %08x" NL, dev->def->index, |
| 2078 | emacdata->phy_map, busy_phy_map); |
| 2079 | |
| 2080 | EMAC_RX_CLK_TX(dev->def->index); |
| 2081 | |
| 2082 | dev->phy.mdio_read = emac_mdio_read; |
| 2083 | dev->phy.mdio_write = emac_mdio_write; |
| 2084 | |
| 2085 | /* Configure EMAC with defaults so we can at least use MDIO |
| 2086 | * This is needed mostly for 440GX |
| 2087 | */ |
| 2088 | if (emac_phy_gpcs(dev->phy.mode)) { |
| 2089 | /* XXX |
| 2090 | * Make GPCS PHY address equal to EMAC index. |
| 2091 | * We probably should take into account busy_phy_map |
| 2092 | * and/or phy_map here. |
| 2093 | */ |
| 2094 | dev->phy.address = dev->def->index; |
| 2095 | } |
| 2096 | |
| 2097 | emac_configure(dev); |
| 2098 | |
| 2099 | for (i = 0; i < 0x20; phy_map >>= 1, ++i) |
| 2100 | if (!(phy_map & 1)) { |
| 2101 | int r; |
| 2102 | busy_phy_map |= 1 << i; |
| 2103 | |
| 2104 | /* Quick check if there is a PHY at the address */ |
| 2105 | r = emac_mdio_read(dev->ndev, i, MII_BMCR); |
| 2106 | if (r == 0xffff || r < 0) |
| 2107 | continue; |
| 2108 | if (!mii_phy_probe(&dev->phy, i)) |
| 2109 | break; |
| 2110 | } |
| 2111 | if (i == 0x20) { |
| 2112 | printk(KERN_WARNING "emac%d: can't find PHY!\n", |
| 2113 | dev->def->index); |
| 2114 | goto out6; |
| 2115 | } |
| 2116 | |
| 2117 | /* Init PHY */ |
| 2118 | if (dev->phy.def->ops->init) |
| 2119 | dev->phy.def->ops->init(&dev->phy); |
| 2120 | |
| 2121 | /* Disable any PHY features not supported by the platform */ |
| 2122 | dev->phy.def->features &= ~emacdata->phy_feat_exc; |
| 2123 | |
| 2124 | /* Setup initial link parameters */ |
| 2125 | if (dev->phy.features & SUPPORTED_Autoneg) { |
| 2126 | adv = dev->phy.features; |
| 2127 | #if !defined(CONFIG_40x) |
| 2128 | adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; |
| 2129 | #endif |
| 2130 | /* Restart autonegotiation */ |
| 2131 | dev->phy.def->ops->setup_aneg(&dev->phy, adv); |
| 2132 | } else { |
| 2133 | u32 f = dev->phy.def->features; |
| 2134 | int speed = SPEED_10, fd = DUPLEX_HALF; |
| 2135 | |
| 2136 | /* Select highest supported speed/duplex */ |
| 2137 | if (f & SUPPORTED_1000baseT_Full) { |
| 2138 | speed = SPEED_1000; |
| 2139 | fd = DUPLEX_FULL; |
| 2140 | } else if (f & SUPPORTED_1000baseT_Half) |
| 2141 | speed = SPEED_1000; |
| 2142 | else if (f & SUPPORTED_100baseT_Full) { |
| 2143 | speed = SPEED_100; |
| 2144 | fd = DUPLEX_FULL; |
| 2145 | } else if (f & SUPPORTED_100baseT_Half) |
| 2146 | speed = SPEED_100; |
| 2147 | else if (f & SUPPORTED_10baseT_Full) |
| 2148 | fd = DUPLEX_FULL; |
| 2149 | |
| 2150 | /* Force link parameters */ |
| 2151 | dev->phy.def->ops->setup_forced(&dev->phy, speed, fd); |
| 2152 | } |
| 2153 | } else { |
| 2154 | emac_reset(dev); |
| 2155 | |
| 2156 | /* PHY-less configuration. |
| 2157 | * XXX I probably should move these settings to emacdata |
| 2158 | */ |
| 2159 | dev->phy.address = -1; |
| 2160 | dev->phy.features = SUPPORTED_100baseT_Full | SUPPORTED_MII; |
| 2161 | dev->phy.pause = 1; |
| 2162 | } |
| 2163 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2164 | /* Fill in the driver function table */ |
| 2165 | ndev->open = &emac_open; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2166 | if (dev->tah_dev) { |
| 2167 | ndev->hard_start_xmit = &emac_start_xmit_sg; |
| 2168 | ndev->features |= NETIF_F_IP_CSUM | NETIF_F_SG; |
| 2169 | } else |
| 2170 | ndev->hard_start_xmit = &emac_start_xmit; |
| 2171 | ndev->tx_timeout = &emac_full_tx_reset; |
| 2172 | ndev->watchdog_timeo = 5 * HZ; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2173 | ndev->stop = &emac_close; |
| 2174 | ndev->get_stats = &emac_stats; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2175 | ndev->set_multicast_list = &emac_set_multicast_list; |
| 2176 | ndev->do_ioctl = &emac_ioctl; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2177 | if (emac_phy_supports_gige(emacdata->phy_mode)) { |
| 2178 | ndev->change_mtu = &emac_change_mtu; |
| 2179 | dev->commac.ops = &emac_commac_sg_ops; |
| 2180 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2181 | SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2182 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2183 | netif_carrier_off(ndev); |
| 2184 | netif_stop_queue(ndev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2185 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2186 | err = register_netdev(ndev); |
| 2187 | if (err) { |
| 2188 | printk(KERN_ERR "emac%d: failed to register net device (%d)!\n", |
| 2189 | dev->def->index, err); |
| 2190 | goto out6; |
| 2191 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2192 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2193 | ocp_set_drvdata(ocpdev, dev); |
| 2194 | |
| 2195 | printk("%s: emac%d, MAC %02x:%02x:%02x:%02x:%02x:%02x\n", |
| 2196 | ndev->name, dev->def->index, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2197 | ndev->dev_addr[0], ndev->dev_addr[1], ndev->dev_addr[2], |
| 2198 | ndev->dev_addr[3], ndev->dev_addr[4], ndev->dev_addr[5]); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2199 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2200 | if (dev->phy.address >= 0) |
| 2201 | printk("%s: found %s PHY (0x%02x)\n", ndev->name, |
| 2202 | dev->phy.def->name, dev->phy.address); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2203 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2204 | emac_dbg_register(dev->def->index, dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2205 | |
| 2206 | return 0; |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2207 | out6: |
Al Viro | b43de2d | 2005-12-01 10:15:21 -0500 | [diff] [blame] | 2208 | iounmap(dev->emacp); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2209 | out5: |
| 2210 | tah_fini(dev->tah_dev); |
| 2211 | out4: |
| 2212 | rgmii_fini(dev->rgmii_dev, dev->rgmii_input); |
| 2213 | out3: |
| 2214 | zmii_fini(dev->zmii_dev, dev->zmii_input); |
| 2215 | out2: |
| 2216 | mal_unregister_commac(dev->mal, &dev->commac); |
| 2217 | out: |
| 2218 | kfree(ndev); |
| 2219 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2220 | } |
| 2221 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2222 | static struct ocp_device_id emac_ids[] = { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2223 | { .vendor = OCP_VENDOR_IBM, .function = OCP_FUNC_EMAC }, |
| 2224 | { .vendor = OCP_VENDOR_INVALID} |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2225 | }; |
| 2226 | |
| 2227 | static struct ocp_driver emac_driver = { |
| 2228 | .name = "emac", |
| 2229 | .id_table = emac_ids, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2230 | .probe = emac_probe, |
| 2231 | .remove = emac_remove, |
| 2232 | }; |
| 2233 | |
| 2234 | static int __init emac_init(void) |
| 2235 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2236 | printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2237 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2238 | DBG(": init" NL); |
| 2239 | |
| 2240 | if (mal_init()) |
| 2241 | return -ENODEV; |
| 2242 | |
| 2243 | EMAC_CLK_INTERNAL; |
| 2244 | if (ocp_register_driver(&emac_driver)) { |
| 2245 | EMAC_CLK_EXTERNAL; |
| 2246 | ocp_unregister_driver(&emac_driver); |
| 2247 | mal_exit(); |
| 2248 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2249 | } |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2250 | EMAC_CLK_EXTERNAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2251 | |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2252 | emac_init_debug(); |
| 2253 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2254 | } |
| 2255 | |
| 2256 | static void __exit emac_exit(void) |
| 2257 | { |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2258 | DBG(": exit" NL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2259 | ocp_unregister_driver(&emac_driver); |
Eugene Surovegin | 37448f7 | 2005-10-10 16:58:14 -0700 | [diff] [blame] | 2260 | mal_exit(); |
| 2261 | emac_fini_debug(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2262 | } |
| 2263 | |
| 2264 | module_init(emac_init); |
| 2265 | module_exit(emac_exit); |