diff options
author | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-05-13 14:29:12 -0700 |
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committer | Jeff Kirsher <jeffrey.t.kirsher@intel.com> | 2011-08-11 02:41:59 -0700 |
commit | 9aa3283595451ca093500ff0977b106e1f465586 (patch) | |
tree | 89cd128f037b029b67f73fbff7d8cc38177c2b27 /drivers/net/ibm_newemac/core.c | |
parent | 86387e1ac4fcaa45ff5578013a78593d1a0ba279 (diff) | |
download | linux-9aa3283595451ca093500ff0977b106e1f465586.tar.bz2 |
ehea/ibm*: Move the IBM drivers
Move the IBM drivers into drivers/net/ethernet/ibm/ and make the
necessary Kconfig and Makefile changes.
- Renamed ibm_new_emac to emac
- Cleaned up Makefile and Kconfig options which referred to
IBM_NEW_EMAC to IBM_EMAC
- ibmlana driver is a National Semiconductor SONIC driver so
it was not moved
CC: Christoph Raisch <raisch@de.ibm.com>
CC: Santiago Leon <santil@linux.vnet.ibm.com>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: David Gibson <dwg@au1.ibm.com>
CC: Kyle Lucke <klucke@us.ibm.com>
CC: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Diffstat (limited to 'drivers/net/ibm_newemac/core.c')
-rw-r--r-- | drivers/net/ibm_newemac/core.c | 3074 |
1 files changed, 0 insertions, 3074 deletions
diff --git a/drivers/net/ibm_newemac/core.c b/drivers/net/ibm_newemac/core.c deleted file mode 100644 index 70cb7d8a3b53..000000000000 --- a/drivers/net/ibm_newemac/core.c +++ /dev/null @@ -1,3074 +0,0 @@ -/* - * drivers/net/ibm_newemac/core.c - * - * Driver for PowerPC 4xx on-chip ethernet controller. - * - * Copyright 2007 Benjamin Herrenschmidt, IBM Corp. - * <benh@kernel.crashing.org> - * - * Based on the arch/ppc version of the driver: - * - * Copyright (c) 2004, 2005 Zultys Technologies. - * Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net> - * - * Based on original work by - * Matt Porter <mporter@kernel.crashing.org> - * (c) 2003 Benjamin Herrenschmidt <benh@kernel.crashing.org> - * Armin Kuster <akuster@mvista.com> - * Johnnie Peters <jpeters@mvista.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - * - */ - -#include <linux/module.h> -#include <linux/sched.h> -#include <linux/string.h> -#include <linux/errno.h> -#include <linux/delay.h> -#include <linux/types.h> -#include <linux/pci.h> -#include <linux/etherdevice.h> -#include <linux/skbuff.h> -#include <linux/crc32.h> -#include <linux/ethtool.h> -#include <linux/mii.h> -#include <linux/bitops.h> -#include <linux/workqueue.h> -#include <linux/of.h> -#include <linux/of_net.h> -#include <linux/slab.h> - -#include <asm/processor.h> -#include <asm/io.h> -#include <asm/dma.h> -#include <asm/uaccess.h> -#include <asm/dcr.h> -#include <asm/dcr-regs.h> - -#include "core.h" - -/* - * Lack of dma_unmap_???? calls is intentional. - * - * API-correct usage requires additional support state information to be - * maintained for every RX and TX buffer descriptor (BD). Unfortunately, due to - * EMAC design (e.g. TX buffer passed from network stack can be split into - * several BDs, dma_map_single/dma_map_page can be used to map particular BD), - * maintaining such information will add additional overhead. - * Current DMA API implementation for 4xx processors only ensures cache coherency - * and dma_unmap_???? routines are empty and are likely to stay this way. - * I decided to omit dma_unmap_??? calls because I don't want to add additional - * complexity just for the sake of following some abstract API, when it doesn't - * add any real benefit to the driver. I understand that this decision maybe - * controversial, but I really tried to make code API-correct and efficient - * at the same time and didn't come up with code I liked :(. --ebs - */ - -#define DRV_NAME "emac" -#define DRV_VERSION "3.54" -#define DRV_DESC "PPC 4xx OCP EMAC driver" - -MODULE_DESCRIPTION(DRV_DESC); -MODULE_AUTHOR - ("Eugene Surovegin <eugene.surovegin@zultys.com> or <ebs@ebshome.net>"); -MODULE_LICENSE("GPL"); - -/* - * PPC64 doesn't (yet) have a cacheable_memcpy - */ -#ifdef CONFIG_PPC64 -#define cacheable_memcpy(d,s,n) memcpy((d),(s),(n)) -#endif - -/* minimum number of free TX descriptors required to wake up TX process */ -#define EMAC_TX_WAKEUP_THRESH (NUM_TX_BUFF / 4) - -/* If packet size is less than this number, we allocate small skb and copy packet - * contents into it instead of just sending original big skb up - */ -#define EMAC_RX_COPY_THRESH CONFIG_IBM_NEW_EMAC_RX_COPY_THRESHOLD - -/* Since multiple EMACs share MDIO lines in various ways, we need - * to avoid re-using the same PHY ID in cases where the arch didn't - * setup precise phy_map entries - * - * XXX This is something that needs to be reworked as we can have multiple - * EMAC "sets" (multiple ASICs containing several EMACs) though we can - * probably require in that case to have explicit PHY IDs in the device-tree - */ -static u32 busy_phy_map; -static DEFINE_MUTEX(emac_phy_map_lock); - -/* This is the wait queue used to wait on any event related to probe, that - * is discovery of MALs, other EMACs, ZMII/RGMIIs, etc... - */ -static DECLARE_WAIT_QUEUE_HEAD(emac_probe_wait); - -/* Having stable interface names is a doomed idea. However, it would be nice - * if we didn't have completely random interface names at boot too :-) It's - * just a matter of making everybody's life easier. Since we are doing - * threaded probing, it's a bit harder though. The base idea here is that - * we make up a list of all emacs in the device-tree before we register the - * driver. Every emac will then wait for the previous one in the list to - * initialize before itself. We should also keep that list ordered by - * cell_index. - * That list is only 4 entries long, meaning that additional EMACs don't - * get ordering guarantees unless EMAC_BOOT_LIST_SIZE is increased. - */ - -#define EMAC_BOOT_LIST_SIZE 4 -static struct device_node *emac_boot_list[EMAC_BOOT_LIST_SIZE]; - -/* How long should I wait for dependent devices ? */ -#define EMAC_PROBE_DEP_TIMEOUT (HZ * 5) - -/* I don't want to litter system log with timeout errors - * when we have brain-damaged PHY. - */ -static inline void emac_report_timeout_error(struct emac_instance *dev, - const char *error) -{ - if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX | - EMAC_FTR_460EX_PHY_CLK_FIX | - EMAC_FTR_440EP_PHY_CLK_FIX)) - DBG(dev, "%s" NL, error); - else if (net_ratelimit()) - printk(KERN_ERR "%s: %s\n", dev->ofdev->dev.of_node->full_name, - error); -} - -/* EMAC PHY clock workaround: - * 440EP/440GR has more sane SDR0_MFR register implementation than 440GX, - * which allows controlling each EMAC clock - */ -static inline void emac_rx_clk_tx(struct emac_instance *dev) -{ -#ifdef CONFIG_PPC_DCR_NATIVE - if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) - dcri_clrset(SDR0, SDR0_MFR, - 0, SDR0_MFR_ECS >> dev->cell_index); -#endif -} - -static inline void emac_rx_clk_default(struct emac_instance *dev) -{ -#ifdef CONFIG_PPC_DCR_NATIVE - if (emac_has_feature(dev, EMAC_FTR_440EP_PHY_CLK_FIX)) - dcri_clrset(SDR0, SDR0_MFR, - SDR0_MFR_ECS >> dev->cell_index, 0); -#endif -} - -/* PHY polling intervals */ -#define PHY_POLL_LINK_ON HZ -#define PHY_POLL_LINK_OFF (HZ / 5) - -/* Graceful stop timeouts in us. - * We should allow up to 1 frame time (full-duplex, ignoring collisions) - */ -#define STOP_TIMEOUT_10 1230 -#define STOP_TIMEOUT_100 124 -#define STOP_TIMEOUT_1000 13 -#define STOP_TIMEOUT_1000_JUMBO 73 - -static unsigned char default_mcast_addr[] = { - 0x01, 0x80, 0xC2, 0x00, 0x00, 0x01 -}; - -/* Please, keep in sync with struct ibm_emac_stats/ibm_emac_error_stats */ -static const char emac_stats_keys[EMAC_ETHTOOL_STATS_COUNT][ETH_GSTRING_LEN] = { - "rx_packets", "rx_bytes", "tx_packets", "tx_bytes", "rx_packets_csum", - "tx_packets_csum", "tx_undo", "rx_dropped_stack", "rx_dropped_oom", - "rx_dropped_error", "rx_dropped_resize", "rx_dropped_mtu", - "rx_stopped", "rx_bd_errors", "rx_bd_overrun", "rx_bd_bad_packet", - "rx_bd_runt_packet", "rx_bd_short_event", "rx_bd_alignment_error", - "rx_bd_bad_fcs", "rx_bd_packet_too_long", "rx_bd_out_of_range", - "rx_bd_in_range", "rx_parity", "rx_fifo_overrun", "rx_overrun", - "rx_bad_packet", "rx_runt_packet", "rx_short_event", - "rx_alignment_error", "rx_bad_fcs", "rx_packet_too_long", - "rx_out_of_range", "rx_in_range", "tx_dropped", "tx_bd_errors", - "tx_bd_bad_fcs", "tx_bd_carrier_loss", "tx_bd_excessive_deferral", - "tx_bd_excessive_collisions", "tx_bd_late_collision", - "tx_bd_multple_collisions", "tx_bd_single_collision", - "tx_bd_underrun", "tx_bd_sqe", "tx_parity", "tx_underrun", "tx_sqe", - "tx_errors" -}; - -static irqreturn_t emac_irq(int irq, void *dev_instance); -static void emac_clean_tx_ring(struct emac_instance *dev); -static void __emac_set_multicast_list(struct emac_instance *dev); - -static inline int emac_phy_supports_gige(int phy_mode) -{ - return phy_mode == PHY_MODE_GMII || - phy_mode == PHY_MODE_RGMII || - phy_mode == PHY_MODE_SGMII || - phy_mode == PHY_MODE_TBI || - phy_mode == PHY_MODE_RTBI; -} - -static inline int emac_phy_gpcs(int phy_mode) -{ - return phy_mode == PHY_MODE_SGMII || - phy_mode == PHY_MODE_TBI || - phy_mode == PHY_MODE_RTBI; -} - -static inline void emac_tx_enable(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 r; - - DBG(dev, "tx_enable" NL); - - r = in_be32(&p->mr0); - if (!(r & EMAC_MR0_TXE)) - out_be32(&p->mr0, r | EMAC_MR0_TXE); -} - -static void emac_tx_disable(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 r; - - DBG(dev, "tx_disable" NL); - - r = in_be32(&p->mr0); - if (r & EMAC_MR0_TXE) { - int n = dev->stop_timeout; - out_be32(&p->mr0, r & ~EMAC_MR0_TXE); - while (!(in_be32(&p->mr0) & EMAC_MR0_TXI) && n) { - udelay(1); - --n; - } - if (unlikely(!n)) - emac_report_timeout_error(dev, "TX disable timeout"); - } -} - -static void emac_rx_enable(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 r; - - if (unlikely(test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) - goto out; - - DBG(dev, "rx_enable" NL); - - r = in_be32(&p->mr0); - if (!(r & EMAC_MR0_RXE)) { - if (unlikely(!(r & EMAC_MR0_RXI))) { - /* Wait if previous async disable is still in progress */ - int n = dev->stop_timeout; - while (!(r = in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { - udelay(1); - --n; - } - if (unlikely(!n)) - emac_report_timeout_error(dev, - "RX disable timeout"); - } - out_be32(&p->mr0, r | EMAC_MR0_RXE); - } - out: - ; -} - -static void emac_rx_disable(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 r; - - DBG(dev, "rx_disable" NL); - - r = in_be32(&p->mr0); - if (r & EMAC_MR0_RXE) { - int n = dev->stop_timeout; - out_be32(&p->mr0, r & ~EMAC_MR0_RXE); - while (!(in_be32(&p->mr0) & EMAC_MR0_RXI) && n) { - udelay(1); - --n; - } - if (unlikely(!n)) - emac_report_timeout_error(dev, "RX disable timeout"); - } -} - -static inline void emac_netif_stop(struct emac_instance *dev) -{ - netif_tx_lock_bh(dev->ndev); - netif_addr_lock(dev->ndev); - dev->no_mcast = 1; - netif_addr_unlock(dev->ndev); - netif_tx_unlock_bh(dev->ndev); - dev->ndev->trans_start = jiffies; /* prevent tx timeout */ - mal_poll_disable(dev->mal, &dev->commac); - netif_tx_disable(dev->ndev); -} - -static inline void emac_netif_start(struct emac_instance *dev) -{ - netif_tx_lock_bh(dev->ndev); - netif_addr_lock(dev->ndev); - dev->no_mcast = 0; - if (dev->mcast_pending && netif_running(dev->ndev)) - __emac_set_multicast_list(dev); - netif_addr_unlock(dev->ndev); - netif_tx_unlock_bh(dev->ndev); - - netif_wake_queue(dev->ndev); - - /* NOTE: unconditional netif_wake_queue is only appropriate - * so long as all callers are assured to have free tx slots - * (taken from tg3... though the case where that is wrong is - * not terribly harmful) - */ - mal_poll_enable(dev->mal, &dev->commac); -} - -static inline void emac_rx_disable_async(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 r; - - DBG(dev, "rx_disable_async" NL); - - r = in_be32(&p->mr0); - if (r & EMAC_MR0_RXE) - out_be32(&p->mr0, r & ~EMAC_MR0_RXE); -} - -static int emac_reset(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - int n = 20; - - DBG(dev, "reset" NL); - - if (!dev->reset_failed) { - /* 40x erratum suggests stopping RX channel before reset, - * we stop TX as well - */ - emac_rx_disable(dev); - emac_tx_disable(dev); - } - -#ifdef CONFIG_PPC_DCR_NATIVE - /* Enable internal clock source */ - if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) - dcri_clrset(SDR0, SDR0_ETH_CFG, - 0, SDR0_ETH_CFG_ECS << dev->cell_index); -#endif - - out_be32(&p->mr0, EMAC_MR0_SRST); - while ((in_be32(&p->mr0) & EMAC_MR0_SRST) && n) - --n; - -#ifdef CONFIG_PPC_DCR_NATIVE - /* Enable external clock source */ - if (emac_has_feature(dev, EMAC_FTR_460EX_PHY_CLK_FIX)) - dcri_clrset(SDR0, SDR0_ETH_CFG, - SDR0_ETH_CFG_ECS << dev->cell_index, 0); -#endif - - if (n) { - dev->reset_failed = 0; - return 0; - } else { - emac_report_timeout_error(dev, "reset timeout"); - dev->reset_failed = 1; - return -ETIMEDOUT; - } -} - -static void emac_hash_mc(struct emac_instance *dev) -{ - const int regs = EMAC_XAHT_REGS(dev); - u32 *gaht_base = emac_gaht_base(dev); - u32 gaht_temp[regs]; - struct netdev_hw_addr *ha; - int i; - - DBG(dev, "hash_mc %d" NL, netdev_mc_count(dev->ndev)); - - memset(gaht_temp, 0, sizeof (gaht_temp)); - - netdev_for_each_mc_addr(ha, dev->ndev) { - int slot, reg, mask; - DBG2(dev, "mc %pM" NL, ha->addr); - - slot = EMAC_XAHT_CRC_TO_SLOT(dev, - ether_crc(ETH_ALEN, ha->addr)); - reg = EMAC_XAHT_SLOT_TO_REG(dev, slot); - mask = EMAC_XAHT_SLOT_TO_MASK(dev, slot); - - gaht_temp[reg] |= mask; - } - - for (i = 0; i < regs; i++) - out_be32(gaht_base + i, gaht_temp[i]); -} - -static inline u32 emac_iff2rmr(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - u32 r; - - r = EMAC_RMR_SP | EMAC_RMR_SFCS | EMAC_RMR_IAE | EMAC_RMR_BAE; - - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - r |= EMAC4_RMR_BASE; - else - r |= EMAC_RMR_BASE; - - if (ndev->flags & IFF_PROMISC) - r |= EMAC_RMR_PME; - else if (ndev->flags & IFF_ALLMULTI || - (netdev_mc_count(ndev) > EMAC_XAHT_SLOTS(dev))) - r |= EMAC_RMR_PMME; - else if (!netdev_mc_empty(ndev)) - r |= EMAC_RMR_MAE; - - return r; -} - -static u32 __emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) -{ - u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC_MR1_TR0_MULT; - - DBG2(dev, "__emac_calc_base_mr1" NL); - - switch(tx_size) { - case 2048: - ret |= EMAC_MR1_TFS_2K; - break; - default: - printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", - dev->ndev->name, tx_size); - } - - switch(rx_size) { - case 16384: - ret |= EMAC_MR1_RFS_16K; - break; - case 4096: - ret |= EMAC_MR1_RFS_4K; - break; - default: - printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", - dev->ndev->name, rx_size); - } - - return ret; -} - -static u32 __emac4_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) -{ - u32 ret = EMAC_MR1_VLE | EMAC_MR1_IST | EMAC4_MR1_TR | - EMAC4_MR1_OBCI(dev->opb_bus_freq / 1000000); - - DBG2(dev, "__emac4_calc_base_mr1" NL); - - switch(tx_size) { - case 16384: - ret |= EMAC4_MR1_TFS_16K; - break; - case 4096: - ret |= EMAC4_MR1_TFS_4K; - break; - case 2048: - ret |= EMAC4_MR1_TFS_2K; - break; - default: - printk(KERN_WARNING "%s: Unknown Tx FIFO size %d\n", - dev->ndev->name, tx_size); - } - - switch(rx_size) { - case 16384: - ret |= EMAC4_MR1_RFS_16K; - break; - case 4096: - ret |= EMAC4_MR1_RFS_4K; - break; - case 2048: - ret |= EMAC4_MR1_RFS_2K; - break; - default: - printk(KERN_WARNING "%s: Unknown Rx FIFO size %d\n", - dev->ndev->name, rx_size); - } - - return ret; -} - -static u32 emac_calc_base_mr1(struct emac_instance *dev, int tx_size, int rx_size) -{ - return emac_has_feature(dev, EMAC_FTR_EMAC4) ? - __emac4_calc_base_mr1(dev, tx_size, rx_size) : - __emac_calc_base_mr1(dev, tx_size, rx_size); -} - -static inline u32 emac_calc_trtr(struct emac_instance *dev, unsigned int size) -{ - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - return ((size >> 6) - 1) << EMAC_TRTR_SHIFT_EMAC4; - else - return ((size >> 6) - 1) << EMAC_TRTR_SHIFT; -} - -static inline u32 emac_calc_rwmr(struct emac_instance *dev, - unsigned int low, unsigned int high) -{ - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - return (low << 22) | ( (high & 0x3ff) << 6); - else - return (low << 23) | ( (high & 0x1ff) << 7); -} - -static int emac_configure(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - struct net_device *ndev = dev->ndev; - int tx_size, rx_size, link = netif_carrier_ok(dev->ndev); - u32 r, mr1 = 0; - - DBG(dev, "configure" NL); - - if (!link) { - out_be32(&p->mr1, in_be32(&p->mr1) - | EMAC_MR1_FDE | EMAC_MR1_ILE); - udelay(100); - } else if (emac_reset(dev) < 0) - return -ETIMEDOUT; - - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) - tah_reset(dev->tah_dev); - - DBG(dev, " link = %d duplex = %d, pause = %d, asym_pause = %d\n", - link, dev->phy.duplex, dev->phy.pause, dev->phy.asym_pause); - - /* Default fifo sizes */ - tx_size = dev->tx_fifo_size; - rx_size = dev->rx_fifo_size; - - /* No link, force loopback */ - if (!link) - mr1 = EMAC_MR1_FDE | EMAC_MR1_ILE; - - /* Check for full duplex */ - else if (dev->phy.duplex == DUPLEX_FULL) - mr1 |= EMAC_MR1_FDE | EMAC_MR1_MWSW_001; - - /* Adjust fifo sizes, mr1 and timeouts based on link speed */ - dev->stop_timeout = STOP_TIMEOUT_10; - switch (dev->phy.speed) { - case SPEED_1000: - if (emac_phy_gpcs(dev->phy.mode)) { - mr1 |= EMAC_MR1_MF_1000GPCS | EMAC_MR1_MF_IPPA( - (dev->phy.gpcs_address != 0xffffffff) ? - dev->phy.gpcs_address : dev->phy.address); - - /* Put some arbitrary OUI, Manuf & Rev IDs so we can - * identify this GPCS PHY later. - */ - out_be32(&p->u1.emac4.ipcr, 0xdeadbeef); - } else - mr1 |= EMAC_MR1_MF_1000; - - /* Extended fifo sizes */ - tx_size = dev->tx_fifo_size_gige; - rx_size = dev->rx_fifo_size_gige; - - if (dev->ndev->mtu > ETH_DATA_LEN) { - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - mr1 |= EMAC4_MR1_JPSM; - else - mr1 |= EMAC_MR1_JPSM; - dev->stop_timeout = STOP_TIMEOUT_1000_JUMBO; - } else - dev->stop_timeout = STOP_TIMEOUT_1000; - break; - case SPEED_100: - mr1 |= EMAC_MR1_MF_100; - dev->stop_timeout = STOP_TIMEOUT_100; - break; - default: /* make gcc happy */ - break; - } - - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - rgmii_set_speed(dev->rgmii_dev, dev->rgmii_port, - dev->phy.speed); - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - zmii_set_speed(dev->zmii_dev, dev->zmii_port, dev->phy.speed); - - /* on 40x erratum forces us to NOT use integrated flow control, - * let's hope it works on 44x ;) - */ - if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x) && - dev->phy.duplex == DUPLEX_FULL) { - if (dev->phy.pause) - mr1 |= EMAC_MR1_EIFC | EMAC_MR1_APP; - else if (dev->phy.asym_pause) - mr1 |= EMAC_MR1_APP; - } - - /* Add base settings & fifo sizes & program MR1 */ - mr1 |= emac_calc_base_mr1(dev, tx_size, rx_size); - out_be32(&p->mr1, mr1); - - /* Set individual MAC address */ - out_be32(&p->iahr, (ndev->dev_addr[0] << 8) | ndev->dev_addr[1]); - out_be32(&p->ialr, (ndev->dev_addr[2] << 24) | - (ndev->dev_addr[3] << 16) | (ndev->dev_addr[4] << 8) | - ndev->dev_addr[5]); - - /* VLAN Tag Protocol ID */ - out_be32(&p->vtpid, 0x8100); - - /* Receive mode register */ - r = emac_iff2rmr(ndev); - if (r & EMAC_RMR_MAE) - emac_hash_mc(dev); - out_be32(&p->rmr, r); - - /* FIFOs thresholds */ - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - r = EMAC4_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, - tx_size / 2 / dev->fifo_entry_size); - else - r = EMAC_TMR1((dev->mal_burst_size / dev->fifo_entry_size) + 1, - tx_size / 2 / dev->fifo_entry_size); - out_be32(&p->tmr1, r); - out_be32(&p->trtr, emac_calc_trtr(dev, tx_size / 2)); - - /* PAUSE frame is sent when RX FIFO reaches its high-water mark, - there should be still enough space in FIFO to allow the our link - partner time to process this frame and also time to send PAUSE - frame itself. - - Here is the worst case scenario for the RX FIFO "headroom" - (from "The Switch Book") (100Mbps, without preamble, inter-frame gap): - - 1) One maximum-length frame on TX 1522 bytes - 2) One PAUSE frame time 64 bytes - 3) PAUSE frame decode time allowance 64 bytes - 4) One maximum-length frame on RX 1522 bytes - 5) Round-trip propagation delay of the link (100Mb) 15 bytes - ---------- - 3187 bytes - - I chose to set high-water mark to RX_FIFO_SIZE / 4 (1024 bytes) - low-water mark to RX_FIFO_SIZE / 8 (512 bytes) - */ - r = emac_calc_rwmr(dev, rx_size / 8 / dev->fifo_entry_size, - rx_size / 4 / dev->fifo_entry_size); - out_be32(&p->rwmr, r); - - /* Set PAUSE timer to the maximum */ - out_be32(&p->ptr, 0xffff); - - /* IRQ sources */ - r = EMAC_ISR_OVR | EMAC_ISR_BP | EMAC_ISR_SE | - EMAC_ISR_ALE | EMAC_ISR_BFCS | EMAC_ISR_PTLE | EMAC_ISR_ORE | - EMAC_ISR_IRE | EMAC_ISR_TE; - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - r |= EMAC4_ISR_TXPE | EMAC4_ISR_RXPE /* | EMAC4_ISR_TXUE | - EMAC4_ISR_RXOE | */; - out_be32(&p->iser, r); - - /* We need to take GPCS PHY out of isolate mode after EMAC reset */ - if (emac_phy_gpcs(dev->phy.mode)) { - if (dev->phy.gpcs_address != 0xffffffff) - emac_mii_reset_gpcs(&dev->phy); - else - emac_mii_reset_phy(&dev->phy); - } - - return 0; -} - -static void emac_reinitialize(struct emac_instance *dev) -{ - DBG(dev, "reinitialize" NL); - - emac_netif_stop(dev); - if (!emac_configure(dev)) { - emac_tx_enable(dev); - emac_rx_enable(dev); - } - emac_netif_start(dev); -} - -static void emac_full_tx_reset(struct emac_instance *dev) -{ - DBG(dev, "full_tx_reset" NL); - - emac_tx_disable(dev); - mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); - emac_clean_tx_ring(dev); - dev->tx_cnt = dev->tx_slot = dev->ack_slot = 0; - - emac_configure(dev); - - mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); - emac_tx_enable(dev); - emac_rx_enable(dev); -} - -static void emac_reset_work(struct work_struct *work) -{ - struct emac_instance *dev = container_of(work, struct emac_instance, reset_work); - - DBG(dev, "reset_work" NL); - - mutex_lock(&dev->link_lock); - if (dev->opened) { - emac_netif_stop(dev); - emac_full_tx_reset(dev); - emac_netif_start(dev); - } - mutex_unlock(&dev->link_lock); -} - -static void emac_tx_timeout(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - - DBG(dev, "tx_timeout" NL); - - schedule_work(&dev->reset_work); -} - - -static inline int emac_phy_done(struct emac_instance *dev, u32 stacr) -{ - int done = !!(stacr & EMAC_STACR_OC); - - if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) - done = !done; - - return done; -}; - -static int __emac_mdio_read(struct emac_instance *dev, u8 id, u8 reg) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 r = 0; - int n, err = -ETIMEDOUT; - - mutex_lock(&dev->mdio_lock); - - DBG2(dev, "mdio_read(%02x,%02x)" NL, id, reg); - - /* Enable proper MDIO port */ - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - zmii_get_mdio(dev->zmii_dev, dev->zmii_port); - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); - - /* Wait for management interface to become idle */ - n = 20; - while (!emac_phy_done(dev, in_be32(&p->stacr))) { - udelay(1); - if (!--n) { - DBG2(dev, " -> timeout wait idle\n"); - goto bail; - } - } - - /* Issue read command */ - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - r = EMAC4_STACR_BASE(dev->opb_bus_freq); - else - r = EMAC_STACR_BASE(dev->opb_bus_freq); - if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) - r |= EMAC_STACR_OC; - if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) - r |= EMACX_STACR_STAC_READ; - else - r |= EMAC_STACR_STAC_READ; - r |= (reg & EMAC_STACR_PRA_MASK) - | ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT); - out_be32(&p->stacr, r); - - /* Wait for read to complete */ - n = 200; - while (!emac_phy_done(dev, (r = in_be32(&p->stacr)))) { - udelay(1); - if (!--n) { - DBG2(dev, " -> timeout wait complete\n"); - goto bail; - } - } - - if (unlikely(r & EMAC_STACR_PHYE)) { - DBG(dev, "mdio_read(%02x, %02x) failed" NL, id, reg); - err = -EREMOTEIO; - goto bail; - } - - r = ((r >> EMAC_STACR_PHYD_SHIFT) & EMAC_STACR_PHYD_MASK); - - DBG2(dev, "mdio_read -> %04x" NL, r); - err = 0; - bail: - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - zmii_put_mdio(dev->zmii_dev, dev->zmii_port); - mutex_unlock(&dev->mdio_lock); - - return err == 0 ? r : err; -} - -static void __emac_mdio_write(struct emac_instance *dev, u8 id, u8 reg, - u16 val) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 r = 0; - int n, err = -ETIMEDOUT; - - mutex_lock(&dev->mdio_lock); - - DBG2(dev, "mdio_write(%02x,%02x,%04x)" NL, id, reg, val); - - /* Enable proper MDIO port */ - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - zmii_get_mdio(dev->zmii_dev, dev->zmii_port); - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - rgmii_get_mdio(dev->rgmii_dev, dev->rgmii_port); - - /* Wait for management interface to be idle */ - n = 20; - while (!emac_phy_done(dev, in_be32(&p->stacr))) { - udelay(1); - if (!--n) { - DBG2(dev, " -> timeout wait idle\n"); - goto bail; - } - } - - /* Issue write command */ - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - r = EMAC4_STACR_BASE(dev->opb_bus_freq); - else - r = EMAC_STACR_BASE(dev->opb_bus_freq); - if (emac_has_feature(dev, EMAC_FTR_STACR_OC_INVERT)) - r |= EMAC_STACR_OC; - if (emac_has_feature(dev, EMAC_FTR_HAS_NEW_STACR)) - r |= EMACX_STACR_STAC_WRITE; - else - r |= EMAC_STACR_STAC_WRITE; - r |= (reg & EMAC_STACR_PRA_MASK) | - ((id & EMAC_STACR_PCDA_MASK) << EMAC_STACR_PCDA_SHIFT) | - (val << EMAC_STACR_PHYD_SHIFT); - out_be32(&p->stacr, r); - - /* Wait for write to complete */ - n = 200; - while (!emac_phy_done(dev, in_be32(&p->stacr))) { - udelay(1); - if (!--n) { - DBG2(dev, " -> timeout wait complete\n"); - goto bail; - } - } - err = 0; - bail: - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - rgmii_put_mdio(dev->rgmii_dev, dev->rgmii_port); - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - zmii_put_mdio(dev->zmii_dev, dev->zmii_port); - mutex_unlock(&dev->mdio_lock); -} - -static int emac_mdio_read(struct net_device *ndev, int id, int reg) -{ - struct emac_instance *dev = netdev_priv(ndev); - int res; - - res = __emac_mdio_read((dev->mdio_instance && - dev->phy.gpcs_address != id) ? - dev->mdio_instance : dev, - (u8) id, (u8) reg); - return res; -} - -static void emac_mdio_write(struct net_device *ndev, int id, int reg, int val) -{ - struct emac_instance *dev = netdev_priv(ndev); - - __emac_mdio_write((dev->mdio_instance && - dev->phy.gpcs_address != id) ? - dev->mdio_instance : dev, - (u8) id, (u8) reg, (u16) val); -} - -/* Tx lock BH */ -static void __emac_set_multicast_list(struct emac_instance *dev) -{ - struct emac_regs __iomem *p = dev->emacp; - u32 rmr = emac_iff2rmr(dev->ndev); - - DBG(dev, "__multicast %08x" NL, rmr); - - /* I decided to relax register access rules here to avoid - * full EMAC reset. - * - * There is a real problem with EMAC4 core if we use MWSW_001 bit - * in MR1 register and do a full EMAC reset. - * One TX BD status update is delayed and, after EMAC reset, it - * never happens, resulting in TX hung (it'll be recovered by TX - * timeout handler eventually, but this is just gross). - * So we either have to do full TX reset or try to cheat here :) - * - * The only required change is to RX mode register, so I *think* all - * we need is just to stop RX channel. This seems to work on all - * tested SoCs. --ebs - * - * If we need the full reset, we might just trigger the workqueue - * and do it async... a bit nasty but should work --BenH - */ - dev->mcast_pending = 0; - emac_rx_disable(dev); - if (rmr & EMAC_RMR_MAE) - emac_hash_mc(dev); - out_be32(&p->rmr, rmr); - emac_rx_enable(dev); -} - -/* Tx lock BH */ -static void emac_set_multicast_list(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - - DBG(dev, "multicast" NL); - - BUG_ON(!netif_running(dev->ndev)); - - if (dev->no_mcast) { - dev->mcast_pending = 1; - return; - } - __emac_set_multicast_list(dev); -} - -static int emac_resize_rx_ring(struct emac_instance *dev, int new_mtu) -{ - int rx_sync_size = emac_rx_sync_size(new_mtu); - int rx_skb_size = emac_rx_skb_size(new_mtu); - int i, ret = 0; - - mutex_lock(&dev->link_lock); - emac_netif_stop(dev); - emac_rx_disable(dev); - mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); - - if (dev->rx_sg_skb) { - ++dev->estats.rx_dropped_resize; - dev_kfree_skb(dev->rx_sg_skb); - dev->rx_sg_skb = NULL; - } - - /* Make a first pass over RX ring and mark BDs ready, dropping - * non-processed packets on the way. We need this as a separate pass - * to simplify error recovery in the case of allocation failure later. - */ - for (i = 0; i < NUM_RX_BUFF; ++i) { - if (dev->rx_desc[i].ctrl & MAL_RX_CTRL_FIRST) - ++dev->estats.rx_dropped_resize; - - dev->rx_desc[i].data_len = 0; - dev->rx_desc[i].ctrl = MAL_RX_CTRL_EMPTY | - (i == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); - } - - /* Reallocate RX ring only if bigger skb buffers are required */ - if (rx_skb_size <= dev->rx_skb_size) - goto skip; - - /* Second pass, allocate new skbs */ - for (i = 0; i < NUM_RX_BUFF; ++i) { - struct sk_buff *skb = alloc_skb(rx_skb_size, GFP_ATOMIC); - if (!skb) { - ret = -ENOMEM; - goto oom; - } - - BUG_ON(!dev->rx_skb[i]); - dev_kfree_skb(dev->rx_skb[i]); - - skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); - dev->rx_desc[i].data_ptr = - dma_map_single(&dev->ofdev->dev, skb->data - 2, rx_sync_size, - DMA_FROM_DEVICE) + 2; - dev->rx_skb[i] = skb; - } - skip: - /* Check if we need to change "Jumbo" bit in MR1 */ - if ((new_mtu > ETH_DATA_LEN) ^ (dev->ndev->mtu > ETH_DATA_LEN)) { - /* This is to prevent starting RX channel in emac_rx_enable() */ - set_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); - - dev->ndev->mtu = new_mtu; - emac_full_tx_reset(dev); - } - - mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(new_mtu)); - oom: - /* Restart RX */ - clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); - dev->rx_slot = 0; - mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); - emac_rx_enable(dev); - emac_netif_start(dev); - mutex_unlock(&dev->link_lock); - - return ret; -} - -/* Process ctx, rtnl_lock semaphore */ -static int emac_change_mtu(struct net_device *ndev, int new_mtu) -{ - struct emac_instance *dev = netdev_priv(ndev); - int ret = 0; - - if (new_mtu < EMAC_MIN_MTU || new_mtu > dev->max_mtu) - return -EINVAL; - - DBG(dev, "change_mtu(%d)" NL, new_mtu); - - if (netif_running(ndev)) { - /* Check if we really need to reinitialize RX ring */ - if (emac_rx_skb_size(ndev->mtu) != emac_rx_skb_size(new_mtu)) - ret = emac_resize_rx_ring(dev, new_mtu); - } - - if (!ret) { - ndev->mtu = new_mtu; - dev->rx_skb_size = emac_rx_skb_size(new_mtu); - dev->rx_sync_size = emac_rx_sync_size(new_mtu); - } - - return ret; -} - -static void emac_clean_tx_ring(struct emac_instance *dev) -{ - int i; - - for (i = 0; i < NUM_TX_BUFF; ++i) { - if (dev->tx_skb[i]) { - dev_kfree_skb(dev->tx_skb[i]); - dev->tx_skb[i] = NULL; - if (dev->tx_desc[i].ctrl & MAL_TX_CTRL_READY) - ++dev->estats.tx_dropped; - } - dev->tx_desc[i].ctrl = 0; - dev->tx_desc[i].data_ptr = 0; - } -} - -static void emac_clean_rx_ring(struct emac_instance *dev) -{ - int i; - - for (i = 0; i < NUM_RX_BUFF; ++i) - if (dev->rx_skb[i]) { - dev->rx_desc[i].ctrl = 0; - dev_kfree_skb(dev->rx_skb[i]); - dev->rx_skb[i] = NULL; - dev->rx_desc[i].data_ptr = 0; - } - - if (dev->rx_sg_skb) { - dev_kfree_skb(dev->rx_sg_skb); - dev->rx_sg_skb = NULL; - } -} - -static inline int emac_alloc_rx_skb(struct emac_instance *dev, int slot, - gfp_t flags) -{ - struct sk_buff *skb = alloc_skb(dev->rx_skb_size, flags); - if (unlikely(!skb)) - return -ENOMEM; - - dev->rx_skb[slot] = skb; - dev->rx_desc[slot].data_len = 0; - - skb_reserve(skb, EMAC_RX_SKB_HEADROOM + 2); - dev->rx_desc[slot].data_ptr = - dma_map_single(&dev->ofdev->dev, skb->data - 2, dev->rx_sync_size, - DMA_FROM_DEVICE) + 2; - wmb(); - dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | - (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); - - return 0; -} - -static void emac_print_link_status(struct emac_instance *dev) -{ - if (netif_carrier_ok(dev->ndev)) - printk(KERN_INFO "%s: link is up, %d %s%s\n", - dev->ndev->name, dev->phy.speed, - dev->phy.duplex == DUPLEX_FULL ? "FDX" : "HDX", - dev->phy.pause ? ", pause enabled" : - dev->phy.asym_pause ? ", asymmetric pause enabled" : ""); - else - printk(KERN_INFO "%s: link is down\n", dev->ndev->name); -} - -/* Process ctx, rtnl_lock semaphore */ -static int emac_open(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - int err, i; - - DBG(dev, "open" NL); - - /* Setup error IRQ handler */ - err = request_irq(dev->emac_irq, emac_irq, 0, "EMAC", dev); - if (err) { - printk(KERN_ERR "%s: failed to request IRQ %d\n", - ndev->name, dev->emac_irq); - return err; - } - - /* Allocate RX ring */ - for (i = 0; i < NUM_RX_BUFF; ++i) - if (emac_alloc_rx_skb(dev, i, GFP_KERNEL)) { - printk(KERN_ERR "%s: failed to allocate RX ring\n", - ndev->name); - goto oom; - } - - dev->tx_cnt = dev->tx_slot = dev->ack_slot = dev->rx_slot = 0; - clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); - dev->rx_sg_skb = NULL; - - mutex_lock(&dev->link_lock); - dev->opened = 1; - - /* Start PHY polling now. - */ - if (dev->phy.address >= 0) { - int link_poll_interval; - if (dev->phy.def->ops->poll_link(&dev->phy)) { - dev->phy.def->ops->read_link(&dev->phy); - emac_rx_clk_default(dev); - netif_carrier_on(dev->ndev); - link_poll_interval = PHY_POLL_LINK_ON; - } else { - emac_rx_clk_tx(dev); - netif_carrier_off(dev->ndev); - link_poll_interval = PHY_POLL_LINK_OFF; - } - dev->link_polling = 1; - wmb(); - schedule_delayed_work(&dev->link_work, link_poll_interval); - emac_print_link_status(dev); - } else - netif_carrier_on(dev->ndev); - - /* Required for Pause packet support in EMAC */ - dev_mc_add_global(ndev, default_mcast_addr); - - emac_configure(dev); - mal_poll_add(dev->mal, &dev->commac); - mal_enable_tx_channel(dev->mal, dev->mal_tx_chan); - mal_set_rcbs(dev->mal, dev->mal_rx_chan, emac_rx_size(ndev->mtu)); - mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); - emac_tx_enable(dev); - emac_rx_enable(dev); - emac_netif_start(dev); - - mutex_unlock(&dev->link_lock); - - return 0; - oom: - emac_clean_rx_ring(dev); - free_irq(dev->emac_irq, dev); - - return -ENOMEM; -} - -/* BHs disabled */ -#if 0 -static int emac_link_differs(struct emac_instance *dev) -{ - u32 r = in_be32(&dev->emacp->mr1); - - int duplex = r & EMAC_MR1_FDE ? DUPLEX_FULL : DUPLEX_HALF; - int speed, pause, asym_pause; - - if (r & EMAC_MR1_MF_1000) - speed = SPEED_1000; - else if (r & EMAC_MR1_MF_100) - speed = SPEED_100; - else - speed = SPEED_10; - - switch (r & (EMAC_MR1_EIFC | EMAC_MR1_APP)) { - case (EMAC_MR1_EIFC | EMAC_MR1_APP): - pause = 1; - asym_pause = 0; - break; - case EMAC_MR1_APP: - pause = 0; - asym_pause = 1; - break; - default: - pause = asym_pause = 0; - } - return speed != dev->phy.speed || duplex != dev->phy.duplex || - pause != dev->phy.pause || asym_pause != dev->phy.asym_pause; -} -#endif - -static void emac_link_timer(struct work_struct *work) -{ - struct emac_instance *dev = - container_of(to_delayed_work(work), - struct emac_instance, link_work); - int link_poll_interval; - - mutex_lock(&dev->link_lock); - DBG2(dev, "link timer" NL); - - if (!dev->opened) - goto bail; - - if (dev->phy.def->ops->poll_link(&dev->phy)) { - if (!netif_carrier_ok(dev->ndev)) { - emac_rx_clk_default(dev); - /* Get new link parameters */ - dev->phy.def->ops->read_link(&dev->phy); - - netif_carrier_on(dev->ndev); - emac_netif_stop(dev); - emac_full_tx_reset(dev); - emac_netif_start(dev); - emac_print_link_status(dev); - } - link_poll_interval = PHY_POLL_LINK_ON; - } else { - if (netif_carrier_ok(dev->ndev)) { - emac_rx_clk_tx(dev); - netif_carrier_off(dev->ndev); - netif_tx_disable(dev->ndev); - emac_reinitialize(dev); - emac_print_link_status(dev); - } - link_poll_interval = PHY_POLL_LINK_OFF; - } - schedule_delayed_work(&dev->link_work, link_poll_interval); - bail: - mutex_unlock(&dev->link_lock); -} - -static void emac_force_link_update(struct emac_instance *dev) -{ - netif_carrier_off(dev->ndev); - smp_rmb(); - if (dev->link_polling) { - cancel_delayed_work_sync(&dev->link_work); - if (dev->link_polling) - schedule_delayed_work(&dev->link_work, PHY_POLL_LINK_OFF); - } -} - -/* Process ctx, rtnl_lock semaphore */ -static int emac_close(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - - DBG(dev, "close" NL); - - if (dev->phy.address >= 0) { - dev->link_polling = 0; - cancel_delayed_work_sync(&dev->link_work); - } - mutex_lock(&dev->link_lock); - emac_netif_stop(dev); - dev->opened = 0; - mutex_unlock(&dev->link_lock); - - emac_rx_disable(dev); - emac_tx_disable(dev); - mal_disable_rx_channel(dev->mal, dev->mal_rx_chan); - mal_disable_tx_channel(dev->mal, dev->mal_tx_chan); - mal_poll_del(dev->mal, &dev->commac); - - emac_clean_tx_ring(dev); - emac_clean_rx_ring(dev); - - free_irq(dev->emac_irq, dev); - - netif_carrier_off(ndev); - - return 0; -} - -static inline u16 emac_tx_csum(struct emac_instance *dev, - struct sk_buff *skb) -{ - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && - (skb->ip_summed == CHECKSUM_PARTIAL)) { - ++dev->stats.tx_packets_csum; - return EMAC_TX_CTRL_TAH_CSUM; - } - return 0; -} - -static inline int emac_xmit_finish(struct emac_instance *dev, int len) -{ - struct emac_regs __iomem *p = dev->emacp; - struct net_device *ndev = dev->ndev; - - /* Send the packet out. If the if makes a significant perf - * difference, then we can store the TMR0 value in "dev" - * instead - */ - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - out_be32(&p->tmr0, EMAC4_TMR0_XMIT); - else - out_be32(&p->tmr0, EMAC_TMR0_XMIT); - - if (unlikely(++dev->tx_cnt == NUM_TX_BUFF)) { - netif_stop_queue(ndev); - DBG2(dev, "stopped TX queue" NL); - } - - ndev->trans_start = jiffies; - ++dev->stats.tx_packets; - dev->stats.tx_bytes += len; - - return NETDEV_TX_OK; -} - -/* Tx lock BH */ -static int emac_start_xmit(struct sk_buff *skb, struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - unsigned int len = skb->len; - int slot; - - u16 ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | - MAL_TX_CTRL_LAST | emac_tx_csum(dev, skb); - - slot = dev->tx_slot++; - if (dev->tx_slot == NUM_TX_BUFF) { - dev->tx_slot = 0; - ctrl |= MAL_TX_CTRL_WRAP; - } - - DBG2(dev, "xmit(%u) %d" NL, len, slot); - - dev->tx_skb[slot] = skb; - dev->tx_desc[slot].data_ptr = dma_map_single(&dev->ofdev->dev, - skb->data, len, - DMA_TO_DEVICE); - dev->tx_desc[slot].data_len = (u16) len; - wmb(); - dev->tx_desc[slot].ctrl = ctrl; - - return emac_xmit_finish(dev, len); -} - -static inline int emac_xmit_split(struct emac_instance *dev, int slot, - u32 pd, int len, int last, u16 base_ctrl) -{ - while (1) { - u16 ctrl = base_ctrl; - int chunk = min(len, MAL_MAX_TX_SIZE); - len -= chunk; - - slot = (slot + 1) % NUM_TX_BUFF; - - if (last && !len) - ctrl |= MAL_TX_CTRL_LAST; - if (slot == NUM_TX_BUFF - 1) - ctrl |= MAL_TX_CTRL_WRAP; - - dev->tx_skb[slot] = NULL; - dev->tx_desc[slot].data_ptr = pd; - dev->tx_desc[slot].data_len = (u16) chunk; - dev->tx_desc[slot].ctrl = ctrl; - ++dev->tx_cnt; - - if (!len) - break; - - pd += chunk; - } - return slot; -} - -/* Tx lock BH disabled (SG version for TAH equipped EMACs) */ -static int emac_start_xmit_sg(struct sk_buff *skb, struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - int nr_frags = skb_shinfo(skb)->nr_frags; - int len = skb->len, chunk; - int slot, i; - u16 ctrl; - u32 pd; - - /* This is common "fast" path */ - if (likely(!nr_frags && len <= MAL_MAX_TX_SIZE)) - return emac_start_xmit(skb, ndev); - - len -= skb->data_len; - - /* Note, this is only an *estimation*, we can still run out of empty - * slots because of the additional fragmentation into - * MAL_MAX_TX_SIZE-sized chunks - */ - if (unlikely(dev->tx_cnt + nr_frags + mal_tx_chunks(len) > NUM_TX_BUFF)) - goto stop_queue; - - ctrl = EMAC_TX_CTRL_GFCS | EMAC_TX_CTRL_GP | MAL_TX_CTRL_READY | - emac_tx_csum(dev, skb); - slot = dev->tx_slot; - - /* skb data */ - dev->tx_skb[slot] = NULL; - chunk = min(len, MAL_MAX_TX_SIZE); - dev->tx_desc[slot].data_ptr = pd = - dma_map_single(&dev->ofdev->dev, skb->data, len, DMA_TO_DEVICE); - dev->tx_desc[slot].data_len = (u16) chunk; - len -= chunk; - if (unlikely(len)) - slot = emac_xmit_split(dev, slot, pd + chunk, len, !nr_frags, - ctrl); - /* skb fragments */ - for (i = 0; i < nr_frags; ++i) { - struct skb_frag_struct *frag = &skb_shinfo(skb)->frags[i]; - len = frag->size; - - if (unlikely(dev->tx_cnt + mal_tx_chunks(len) >= NUM_TX_BUFF)) - goto undo_frame; - - pd = dma_map_page(&dev->ofdev->dev, frag->page, frag->page_offset, len, - DMA_TO_DEVICE); - - slot = emac_xmit_split(dev, slot, pd, len, i == nr_frags - 1, - ctrl); - } - - DBG2(dev, "xmit_sg(%u) %d - %d" NL, skb->len, dev->tx_slot, slot); - - /* Attach skb to the last slot so we don't release it too early */ - dev->tx_skb[slot] = skb; - - /* Send the packet out */ - if (dev->tx_slot == NUM_TX_BUFF - 1) - ctrl |= MAL_TX_CTRL_WRAP; - wmb(); - dev->tx_desc[dev->tx_slot].ctrl = ctrl; - dev->tx_slot = (slot + 1) % NUM_TX_BUFF; - - return emac_xmit_finish(dev, skb->len); - - undo_frame: - /* Well, too bad. Our previous estimation was overly optimistic. - * Undo everything. - */ - while (slot != dev->tx_slot) { - dev->tx_desc[slot].ctrl = 0; - --dev->tx_cnt; - if (--slot < 0) - slot = NUM_TX_BUFF - 1; - } - ++dev->estats.tx_undo; - - stop_queue: - netif_stop_queue(ndev); - DBG2(dev, "stopped TX queue" NL); - return NETDEV_TX_BUSY; -} - -/* Tx lock BHs */ -static void emac_parse_tx_error(struct emac_instance *dev, u16 ctrl) -{ - struct emac_error_stats *st = &dev->estats; - - DBG(dev, "BD TX error %04x" NL, ctrl); - - ++st->tx_bd_errors; - if (ctrl & EMAC_TX_ST_BFCS) - ++st->tx_bd_bad_fcs; - if (ctrl & EMAC_TX_ST_LCS) - ++st->tx_bd_carrier_loss; - if (ctrl & EMAC_TX_ST_ED) - ++st->tx_bd_excessive_deferral; - if (ctrl & EMAC_TX_ST_EC) - ++st->tx_bd_excessive_collisions; - if (ctrl & EMAC_TX_ST_LC) - ++st->tx_bd_late_collision; - if (ctrl & EMAC_TX_ST_MC) - ++st->tx_bd_multple_collisions; - if (ctrl & EMAC_TX_ST_SC) - ++st->tx_bd_single_collision; - if (ctrl & EMAC_TX_ST_UR) - ++st->tx_bd_underrun; - if (ctrl & EMAC_TX_ST_SQE) - ++st->tx_bd_sqe; -} - -static void emac_poll_tx(void *param) -{ - struct emac_instance *dev = param; - u32 bad_mask; - - DBG2(dev, "poll_tx, %d %d" NL, dev->tx_cnt, dev->ack_slot); - - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) - bad_mask = EMAC_IS_BAD_TX_TAH; - else - bad_mask = EMAC_IS_BAD_TX; - - netif_tx_lock_bh(dev->ndev); - if (dev->tx_cnt) { - u16 ctrl; - int slot = dev->ack_slot, n = 0; - again: - ctrl = dev->tx_desc[slot].ctrl; - if (!(ctrl & MAL_TX_CTRL_READY)) { - struct sk_buff *skb = dev->tx_skb[slot]; - ++n; - - if (skb) { - dev_kfree_skb(skb); - dev->tx_skb[slot] = NULL; - } - slot = (slot + 1) % NUM_TX_BUFF; - - if (unlikely(ctrl & bad_mask)) - emac_parse_tx_error(dev, ctrl); - - if (--dev->tx_cnt) - goto again; - } - if (n) { - dev->ack_slot = slot; - if (netif_queue_stopped(dev->ndev) && - dev->tx_cnt < EMAC_TX_WAKEUP_THRESH) - netif_wake_queue(dev->ndev); - - DBG2(dev, "tx %d pkts" NL, n); - } - } - netif_tx_unlock_bh(dev->ndev); -} - -static inline void emac_recycle_rx_skb(struct emac_instance *dev, int slot, - int len) -{ - struct sk_buff *skb = dev->rx_skb[slot]; - - DBG2(dev, "recycle %d %d" NL, slot, len); - - if (len) - dma_map_single(&dev->ofdev->dev, skb->data - 2, - EMAC_DMA_ALIGN(len + 2), DMA_FROM_DEVICE); - - dev->rx_desc[slot].data_len = 0; - wmb(); - dev->rx_desc[slot].ctrl = MAL_RX_CTRL_EMPTY | - (slot == (NUM_RX_BUFF - 1) ? MAL_RX_CTRL_WRAP : 0); -} - -static void emac_parse_rx_error(struct emac_instance *dev, u16 ctrl) -{ - struct emac_error_stats *st = &dev->estats; - - DBG(dev, "BD RX error %04x" NL, ctrl); - - ++st->rx_bd_errors; - if (ctrl & EMAC_RX_ST_OE) - ++st->rx_bd_overrun; - if (ctrl & EMAC_RX_ST_BP) - ++st->rx_bd_bad_packet; - if (ctrl & EMAC_RX_ST_RP) - ++st->rx_bd_runt_packet; - if (ctrl & EMAC_RX_ST_SE) - ++st->rx_bd_short_event; - if (ctrl & EMAC_RX_ST_AE) - ++st->rx_bd_alignment_error; - if (ctrl & EMAC_RX_ST_BFCS) - ++st->rx_bd_bad_fcs; - if (ctrl & EMAC_RX_ST_PTL) - ++st->rx_bd_packet_too_long; - if (ctrl & EMAC_RX_ST_ORE) - ++st->rx_bd_out_of_range; - if (ctrl & EMAC_RX_ST_IRE) - ++st->rx_bd_in_range; -} - -static inline void emac_rx_csum(struct emac_instance *dev, - struct sk_buff *skb, u16 ctrl) -{ -#ifdef CONFIG_IBM_NEW_EMAC_TAH - if (!ctrl && dev->tah_dev) { - skb->ip_summed = CHECKSUM_UNNECESSARY; - ++dev->stats.rx_packets_csum; - } -#endif -} - -static inline int emac_rx_sg_append(struct emac_instance *dev, int slot) -{ - if (likely(dev->rx_sg_skb != NULL)) { - int len = dev->rx_desc[slot].data_len; - int tot_len = dev->rx_sg_skb->len + len; - - if (unlikely(tot_len + 2 > dev->rx_skb_size)) { - ++dev->estats.rx_dropped_mtu; - dev_kfree_skb(dev->rx_sg_skb); - dev->rx_sg_skb = NULL; - } else { - cacheable_memcpy(skb_tail_pointer(dev->rx_sg_skb), - dev->rx_skb[slot]->data, len); - skb_put(dev->rx_sg_skb, len); - emac_recycle_rx_skb(dev, slot, len); - return 0; - } - } - emac_recycle_rx_skb(dev, slot, 0); - return -1; -} - -/* NAPI poll context */ -static int emac_poll_rx(void *param, int budget) -{ - struct emac_instance *dev = param; - int slot = dev->rx_slot, received = 0; - - DBG2(dev, "poll_rx(%d)" NL, budget); - - again: - while (budget > 0) { - int len; - struct sk_buff *skb; - u16 ctrl = dev->rx_desc[slot].ctrl; - - if (ctrl & MAL_RX_CTRL_EMPTY) - break; - - skb = dev->rx_skb[slot]; - mb(); - len = dev->rx_desc[slot].data_len; - - if (unlikely(!MAL_IS_SINGLE_RX(ctrl))) - goto sg; - - ctrl &= EMAC_BAD_RX_MASK; - if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { - emac_parse_rx_error(dev, ctrl); - ++dev->estats.rx_dropped_error; - emac_recycle_rx_skb(dev, slot, 0); - len = 0; - goto next; - } - - if (len < ETH_HLEN) { - ++dev->estats.rx_dropped_stack; - emac_recycle_rx_skb(dev, slot, len); - goto next; - } - - if (len && len < EMAC_RX_COPY_THRESH) { - struct sk_buff *copy_skb = - alloc_skb(len + EMAC_RX_SKB_HEADROOM + 2, GFP_ATOMIC); - if (unlikely(!copy_skb)) - goto oom; - - skb_reserve(copy_skb, EMAC_RX_SKB_HEADROOM + 2); - cacheable_memcpy(copy_skb->data - 2, skb->data - 2, - len + 2); - emac_recycle_rx_skb(dev, slot, len); - skb = copy_skb; - } else if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) - goto oom; - - skb_put(skb, len); - push_packet: - skb->protocol = eth_type_trans(skb, dev->ndev); - emac_rx_csum(dev, skb, ctrl); - - if (unlikely(netif_receive_skb(skb) == NET_RX_DROP)) - ++dev->estats.rx_dropped_stack; - next: - ++dev->stats.rx_packets; - skip: - dev->stats.rx_bytes += len; - slot = (slot + 1) % NUM_RX_BUFF; - --budget; - ++received; - continue; - sg: - if (ctrl & MAL_RX_CTRL_FIRST) { - BUG_ON(dev->rx_sg_skb); - if (unlikely(emac_alloc_rx_skb(dev, slot, GFP_ATOMIC))) { - DBG(dev, "rx OOM %d" NL, slot); - ++dev->estats.rx_dropped_oom; - emac_recycle_rx_skb(dev, slot, 0); - } else { - dev->rx_sg_skb = skb; - skb_put(skb, len); - } - } else if (!emac_rx_sg_append(dev, slot) && - (ctrl & MAL_RX_CTRL_LAST)) { - - skb = dev->rx_sg_skb; - dev->rx_sg_skb = NULL; - - ctrl &= EMAC_BAD_RX_MASK; - if (unlikely(ctrl && ctrl != EMAC_RX_TAH_BAD_CSUM)) { - emac_parse_rx_error(dev, ctrl); - ++dev->estats.rx_dropped_error; - dev_kfree_skb(skb); - len = 0; - } else - goto push_packet; - } - goto skip; - oom: - DBG(dev, "rx OOM %d" NL, slot); - /* Drop the packet and recycle skb */ - ++dev->estats.rx_dropped_oom; - emac_recycle_rx_skb(dev, slot, 0); - goto next; - } - - if (received) { - DBG2(dev, "rx %d BDs" NL, received); - dev->rx_slot = slot; - } - - if (unlikely(budget && test_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags))) { - mb(); - if (!(dev->rx_desc[slot].ctrl & MAL_RX_CTRL_EMPTY)) { - DBG2(dev, "rx restart" NL); - received = 0; - goto again; - } - - if (dev->rx_sg_skb) { - DBG2(dev, "dropping partial rx packet" NL); - ++dev->estats.rx_dropped_error; - dev_kfree_skb(dev->rx_sg_skb); - dev->rx_sg_skb = NULL; - } - - clear_bit(MAL_COMMAC_RX_STOPPED, &dev->commac.flags); - mal_enable_rx_channel(dev->mal, dev->mal_rx_chan); - emac_rx_enable(dev); - dev->rx_slot = 0; - } - return received; -} - -/* NAPI poll context */ -static int emac_peek_rx(void *param) -{ - struct emac_instance *dev = param; - - return !(dev->rx_desc[dev->rx_slot].ctrl & MAL_RX_CTRL_EMPTY); -} - -/* NAPI poll context */ -static int emac_peek_rx_sg(void *param) -{ - struct emac_instance *dev = param; - - int slot = dev->rx_slot; - while (1) { - u16 ctrl = dev->rx_desc[slot].ctrl; - if (ctrl & MAL_RX_CTRL_EMPTY) - return 0; - else if (ctrl & MAL_RX_CTRL_LAST) - return 1; - - slot = (slot + 1) % NUM_RX_BUFF; - - /* I'm just being paranoid here :) */ - if (unlikely(slot == dev->rx_slot)) - return 0; - } -} - -/* Hard IRQ */ -static void emac_rxde(void *param) -{ - struct emac_instance *dev = param; - - ++dev->estats.rx_stopped; - emac_rx_disable_async(dev); -} - -/* Hard IRQ */ -static irqreturn_t emac_irq(int irq, void *dev_instance) -{ - struct emac_instance *dev = dev_instance; - struct emac_regs __iomem *p = dev->emacp; - struct emac_error_stats *st = &dev->estats; - u32 isr; - - spin_lock(&dev->lock); - - isr = in_be32(&p->isr); - out_be32(&p->isr, isr); - - DBG(dev, "isr = %08x" NL, isr); - - if (isr & EMAC4_ISR_TXPE) - ++st->tx_parity; - if (isr & EMAC4_ISR_RXPE) - ++st->rx_parity; - if (isr & EMAC4_ISR_TXUE) - ++st->tx_underrun; - if (isr & EMAC4_ISR_RXOE) - ++st->rx_fifo_overrun; - if (isr & EMAC_ISR_OVR) - ++st->rx_overrun; - if (isr & EMAC_ISR_BP) - ++st->rx_bad_packet; - if (isr & EMAC_ISR_RP) - ++st->rx_runt_packet; - if (isr & EMAC_ISR_SE) - ++st->rx_short_event; - if (isr & EMAC_ISR_ALE) - ++st->rx_alignment_error; - if (isr & EMAC_ISR_BFCS) - ++st->rx_bad_fcs; - if (isr & EMAC_ISR_PTLE) - ++st->rx_packet_too_long; - if (isr & EMAC_ISR_ORE) - ++st->rx_out_of_range; - if (isr & EMAC_ISR_IRE) - ++st->rx_in_range; - if (isr & EMAC_ISR_SQE) - ++st->tx_sqe; - if (isr & EMAC_ISR_TE) - ++st->tx_errors; - - spin_unlock(&dev->lock); - - return IRQ_HANDLED; -} - -static struct net_device_stats *emac_stats(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - struct emac_stats *st = &dev->stats; - struct emac_error_stats *est = &dev->estats; - struct net_device_stats *nst = &dev->nstats; - unsigned long flags; - - DBG2(dev, "stats" NL); - - /* Compute "legacy" statistics */ - spin_lock_irqsave(&dev->lock, flags); - nst->rx_packets = (unsigned long)st->rx_packets; - nst->rx_bytes = (unsigned long)st->rx_bytes; - nst->tx_packets = (unsigned long)st->tx_packets; - nst->tx_bytes = (unsigned long)st->tx_bytes; - nst->rx_dropped = (unsigned long)(est->rx_dropped_oom + - est->rx_dropped_error + - est->rx_dropped_resize + - est->rx_dropped_mtu); - nst->tx_dropped = (unsigned long)est->tx_dropped; - - nst->rx_errors = (unsigned long)est->rx_bd_errors; - nst->rx_fifo_errors = (unsigned long)(est->rx_bd_overrun + - est->rx_fifo_overrun + - est->rx_overrun); - nst->rx_frame_errors = (unsigned long)(est->rx_bd_alignment_error + - est->rx_alignment_error); - nst->rx_crc_errors = (unsigned long)(est->rx_bd_bad_fcs + - est->rx_bad_fcs); - nst->rx_length_errors = (unsigned long)(est->rx_bd_runt_packet + - est->rx_bd_short_event + - est->rx_bd_packet_too_long + - est->rx_bd_out_of_range + - est->rx_bd_in_range + - est->rx_runt_packet + - est->rx_short_event + - est->rx_packet_too_long + - est->rx_out_of_range + - est->rx_in_range); - - nst->tx_errors = (unsigned long)(est->tx_bd_errors + est->tx_errors); - nst->tx_fifo_errors = (unsigned long)(est->tx_bd_underrun + - est->tx_underrun); - nst->tx_carrier_errors = (unsigned long)est->tx_bd_carrier_loss; - nst->collisions = (unsigned long)(est->tx_bd_excessive_deferral + - est->tx_bd_excessive_collisions + - est->tx_bd_late_collision + - est->tx_bd_multple_collisions); - spin_unlock_irqrestore(&dev->lock, flags); - return nst; -} - -static struct mal_commac_ops emac_commac_ops = { - .poll_tx = &emac_poll_tx, - .poll_rx = &emac_poll_rx, - .peek_rx = &emac_peek_rx, - .rxde = &emac_rxde, -}; - -static struct mal_commac_ops emac_commac_sg_ops = { - .poll_tx = &emac_poll_tx, - .poll_rx = &emac_poll_rx, - .peek_rx = &emac_peek_rx_sg, - .rxde = &emac_rxde, -}; - -/* Ethtool support */ -static int emac_ethtool_get_settings(struct net_device *ndev, - struct ethtool_cmd *cmd) -{ - struct emac_instance *dev = netdev_priv(ndev); - - cmd->supported = dev->phy.features; - cmd->port = PORT_MII; - cmd->phy_address = dev->phy.address; - cmd->transceiver = - dev->phy.address >= 0 ? XCVR_EXTERNAL : XCVR_INTERNAL; - - mutex_lock(&dev->link_lock); - cmd->advertising = dev->phy.advertising; - cmd->autoneg = dev->phy.autoneg; - cmd->speed = dev->phy.speed; - cmd->duplex = dev->phy.duplex; - mutex_unlock(&dev->link_lock); - - return 0; -} - -static int emac_ethtool_set_settings(struct net_device *ndev, - struct ethtool_cmd *cmd) -{ - struct emac_instance *dev = netdev_priv(ndev); - u32 f = dev->phy.features; - - DBG(dev, "set_settings(%d, %d, %d, 0x%08x)" NL, - cmd->autoneg, cmd->speed, cmd->duplex, cmd->advertising); - - /* Basic sanity checks */ - if (dev->phy.address < 0) - return -EOPNOTSUPP; - if (cmd->autoneg != AUTONEG_ENABLE && cmd->autoneg != AUTONEG_DISABLE) - return -EINVAL; - if (cmd->autoneg == AUTONEG_ENABLE && cmd->advertising == 0) - return -EINVAL; - if (cmd->duplex != DUPLEX_HALF && cmd->duplex != DUPLEX_FULL) - return -EINVAL; - - if (cmd->autoneg == AUTONEG_DISABLE) { - switch (cmd->speed) { - case SPEED_10: - if (cmd->duplex == DUPLEX_HALF && - !(f & SUPPORTED_10baseT_Half)) - return -EINVAL; - if (cmd->duplex == DUPLEX_FULL && - !(f & SUPPORTED_10baseT_Full)) - return -EINVAL; - break; - case SPEED_100: - if (cmd->duplex == DUPLEX_HALF && - !(f & SUPPORTED_100baseT_Half)) - return -EINVAL; - if (cmd->duplex == DUPLEX_FULL && - !(f & SUPPORTED_100baseT_Full)) - return -EINVAL; - break; - case SPEED_1000: - if (cmd->duplex == DUPLEX_HALF && - !(f & SUPPORTED_1000baseT_Half)) - return -EINVAL; - if (cmd->duplex == DUPLEX_FULL && - !(f & SUPPORTED_1000baseT_Full)) - return -EINVAL; - break; - default: - return -EINVAL; - } - - mutex_lock(&dev->link_lock); - dev->phy.def->ops->setup_forced(&dev->phy, cmd->speed, - cmd->duplex); - mutex_unlock(&dev->link_lock); - - } else { - if (!(f & SUPPORTED_Autoneg)) - return -EINVAL; - - mutex_lock(&dev->link_lock); - dev->phy.def->ops->setup_aneg(&dev->phy, - (cmd->advertising & f) | - (dev->phy.advertising & - (ADVERTISED_Pause | - ADVERTISED_Asym_Pause))); - mutex_unlock(&dev->link_lock); - } - emac_force_link_update(dev); - - return 0; -} - -static void emac_ethtool_get_ringparam(struct net_device *ndev, - struct ethtool_ringparam *rp) -{ - rp->rx_max_pending = rp->rx_pending = NUM_RX_BUFF; - rp->tx_max_pending = rp->tx_pending = NUM_TX_BUFF; -} - -static void emac_ethtool_get_pauseparam(struct net_device *ndev, - struct ethtool_pauseparam *pp) -{ - struct emac_instance *dev = netdev_priv(ndev); - - mutex_lock(&dev->link_lock); - if ((dev->phy.features & SUPPORTED_Autoneg) && - (dev->phy.advertising & (ADVERTISED_Pause | ADVERTISED_Asym_Pause))) - pp->autoneg = 1; - - if (dev->phy.duplex == DUPLEX_FULL) { - if (dev->phy.pause) - pp->rx_pause = pp->tx_pause = 1; - else if (dev->phy.asym_pause) - pp->tx_pause = 1; - } - mutex_unlock(&dev->link_lock); -} - -static int emac_get_regs_len(struct emac_instance *dev) -{ - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) - return sizeof(struct emac_ethtool_regs_subhdr) + - EMAC4_ETHTOOL_REGS_SIZE(dev); - else - return sizeof(struct emac_ethtool_regs_subhdr) + - EMAC_ETHTOOL_REGS_SIZE(dev); -} - -static int emac_ethtool_get_regs_len(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - int size; - - size = sizeof(struct emac_ethtool_regs_hdr) + - emac_get_regs_len(dev) + mal_get_regs_len(dev->mal); - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - size += zmii_get_regs_len(dev->zmii_dev); - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - size += rgmii_get_regs_len(dev->rgmii_dev); - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) - size += tah_get_regs_len(dev->tah_dev); - - return size; -} - -static void *emac_dump_regs(struct emac_instance *dev, void *buf) -{ - struct emac_ethtool_regs_subhdr *hdr = buf; - - hdr->index = dev->cell_index; - if (emac_has_feature(dev, EMAC_FTR_EMAC4)) { - hdr->version = EMAC4_ETHTOOL_REGS_VER; - memcpy_fromio(hdr + 1, dev->emacp, EMAC4_ETHTOOL_REGS_SIZE(dev)); - return (void *)(hdr + 1) + EMAC4_ETHTOOL_REGS_SIZE(dev); - } else { - hdr->version = EMAC_ETHTOOL_REGS_VER; - memcpy_fromio(hdr + 1, dev->emacp, EMAC_ETHTOOL_REGS_SIZE(dev)); - return (void *)(hdr + 1) + EMAC_ETHTOOL_REGS_SIZE(dev); - } -} - -static void emac_ethtool_get_regs(struct net_device *ndev, - struct ethtool_regs *regs, void *buf) -{ - struct emac_instance *dev = netdev_priv(ndev); - struct emac_ethtool_regs_hdr *hdr = buf; - - hdr->components = 0; - buf = hdr + 1; - - buf = mal_dump_regs(dev->mal, buf); - buf = emac_dump_regs(dev, buf); - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) { - hdr->components |= EMAC_ETHTOOL_REGS_ZMII; - buf = zmii_dump_regs(dev->zmii_dev, buf); - } - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) { - hdr->components |= EMAC_ETHTOOL_REGS_RGMII; - buf = rgmii_dump_regs(dev->rgmii_dev, buf); - } - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) { - hdr->components |= EMAC_ETHTOOL_REGS_TAH; - buf = tah_dump_regs(dev->tah_dev, buf); - } -} - -static int emac_ethtool_nway_reset(struct net_device *ndev) -{ - struct emac_instance *dev = netdev_priv(ndev); - int res = 0; - - DBG(dev, "nway_reset" NL); - - if (dev->phy.address < 0) - return -EOPNOTSUPP; - - mutex_lock(&dev->link_lock); - if (!dev->phy.autoneg) { - res = -EINVAL; - goto out; - } - - dev->phy.def->ops->setup_aneg(&dev->phy, dev->phy.advertising); - out: - mutex_unlock(&dev->link_lock); - emac_force_link_update(dev); - return res; -} - -static int emac_ethtool_get_sset_count(struct net_device *ndev, int stringset) -{ - if (stringset == ETH_SS_STATS) - return EMAC_ETHTOOL_STATS_COUNT; - else - return -EINVAL; -} - -static void emac_ethtool_get_strings(struct net_device *ndev, u32 stringset, - u8 * buf) -{ - if (stringset == ETH_SS_STATS) - memcpy(buf, &emac_stats_keys, sizeof(emac_stats_keys)); -} - -static void emac_ethtool_get_ethtool_stats(struct net_device *ndev, - struct ethtool_stats *estats, - u64 * tmp_stats) -{ - struct emac_instance *dev = netdev_priv(ndev); - - memcpy(tmp_stats, &dev->stats, sizeof(dev->stats)); - tmp_stats += sizeof(dev->stats) / sizeof(u64); - memcpy(tmp_stats, &dev->estats, sizeof(dev->estats)); -} - -static void emac_ethtool_get_drvinfo(struct net_device *ndev, - struct ethtool_drvinfo *info) -{ - struct emac_instance *dev = netdev_priv(ndev); - - strcpy(info->driver, "ibm_emac"); - strcpy(info->version, DRV_VERSION); - info->fw_version[0] = '\0'; - sprintf(info->bus_info, "PPC 4xx EMAC-%d %s", - dev->cell_index, dev->ofdev->dev.of_node->full_name); - info->regdump_len = emac_ethtool_get_regs_len(ndev); -} - -static const struct ethtool_ops emac_ethtool_ops = { - .get_settings = emac_ethtool_get_settings, - .set_settings = emac_ethtool_set_settings, - .get_drvinfo = emac_ethtool_get_drvinfo, - - .get_regs_len = emac_ethtool_get_regs_len, - .get_regs = emac_ethtool_get_regs, - - .nway_reset = emac_ethtool_nway_reset, - - .get_ringparam = emac_ethtool_get_ringparam, - .get_pauseparam = emac_ethtool_get_pauseparam, - - .get_strings = emac_ethtool_get_strings, - .get_sset_count = emac_ethtool_get_sset_count, - .get_ethtool_stats = emac_ethtool_get_ethtool_stats, - - .get_link = ethtool_op_get_link, -}; - -static int emac_ioctl(struct net_device *ndev, struct ifreq *rq, int cmd) -{ - struct emac_instance *dev = netdev_priv(ndev); - struct mii_ioctl_data *data = if_mii(rq); - - DBG(dev, "ioctl %08x" NL, cmd); - - if (dev->phy.address < 0) - return -EOPNOTSUPP; - - switch (cmd) { - case SIOCGMIIPHY: - data->phy_id = dev->phy.address; - /* Fall through */ - case SIOCGMIIREG: - data->val_out = emac_mdio_read(ndev, dev->phy.address, - data->reg_num); - return 0; - - case SIOCSMIIREG: - emac_mdio_write(ndev, dev->phy.address, data->reg_num, - data->val_in); - return 0; - default: - return -EOPNOTSUPP; - } -} - -struct emac_depentry { - u32 phandle; - struct device_node *node; - struct platform_device *ofdev; - void *drvdata; -}; - -#define EMAC_DEP_MAL_IDX 0 -#define EMAC_DEP_ZMII_IDX 1 -#define EMAC_DEP_RGMII_IDX 2 -#define EMAC_DEP_TAH_IDX 3 -#define EMAC_DEP_MDIO_IDX 4 -#define EMAC_DEP_PREV_IDX 5 -#define EMAC_DEP_COUNT 6 - -static int __devinit emac_check_deps(struct emac_instance *dev, - struct emac_depentry *deps) -{ - int i, there = 0; - struct device_node *np; - - for (i = 0; i < EMAC_DEP_COUNT; i++) { - /* no dependency on that item, allright */ - if (deps[i].phandle == 0) { - there++; - continue; - } - /* special case for blist as the dependency might go away */ - if (i == EMAC_DEP_PREV_IDX) { - np = *(dev->blist - 1); - if (np == NULL) { - deps[i].phandle = 0; - there++; - continue; - } - if (deps[i].node == NULL) - deps[i].node = of_node_get(np); - } - if (deps[i].node == NULL) - deps[i].node = of_find_node_by_phandle(deps[i].phandle); - if (deps[i].node == NULL) - continue; - if (deps[i].ofdev == NULL) - deps[i].ofdev = of_find_device_by_node(deps[i].node); - if (deps[i].ofdev == NULL) - continue; - if (deps[i].drvdata == NULL) - deps[i].drvdata = dev_get_drvdata(&deps[i].ofdev->dev); - if (deps[i].drvdata != NULL) - there++; - } - return there == EMAC_DEP_COUNT; -} - -static void emac_put_deps(struct emac_instance *dev) -{ - if (dev->mal_dev) - of_dev_put(dev->mal_dev); - if (dev->zmii_dev) - of_dev_put(dev->zmii_dev); - if (dev->rgmii_dev) - of_dev_put(dev->rgmii_dev); - if (dev->mdio_dev) - of_dev_put(dev->mdio_dev); - if (dev->tah_dev) - of_dev_put(dev->tah_dev); -} - -static int __devinit emac_of_bus_notify(struct notifier_block *nb, - unsigned long action, void *data) -{ - /* We are only intereted in device addition */ - if (action == BUS_NOTIFY_BOUND_DRIVER) - wake_up_all(&emac_probe_wait); - return 0; -} - -static struct notifier_block emac_of_bus_notifier __devinitdata = { - .notifier_call = emac_of_bus_notify -}; - -static int __devinit emac_wait_deps(struct emac_instance *dev) -{ - struct emac_depentry deps[EMAC_DEP_COUNT]; - int i, err; - - memset(&deps, 0, sizeof(deps)); - - deps[EMAC_DEP_MAL_IDX].phandle = dev->mal_ph; - deps[EMAC_DEP_ZMII_IDX].phandle = dev->zmii_ph; - deps[EMAC_DEP_RGMII_IDX].phandle = dev->rgmii_ph; - if (dev->tah_ph) - deps[EMAC_DEP_TAH_IDX].phandle = dev->tah_ph; - if (dev->mdio_ph) - deps[EMAC_DEP_MDIO_IDX].phandle = dev->mdio_ph; - if (dev->blist && dev->blist > emac_boot_list) - deps[EMAC_DEP_PREV_IDX].phandle = 0xffffffffu; - bus_register_notifier(&platform_bus_type, &emac_of_bus_notifier); - wait_event_timeout(emac_probe_wait, - emac_check_deps(dev, deps), - EMAC_PROBE_DEP_TIMEOUT); - bus_unregister_notifier(&platform_bus_type, &emac_of_bus_notifier); - err = emac_check_deps(dev, deps) ? 0 : -ENODEV; - for (i = 0; i < EMAC_DEP_COUNT; i++) { - if (deps[i].node) - of_node_put(deps[i].node); - if (err && deps[i].ofdev) - of_dev_put(deps[i].ofdev); - } - if (err == 0) { - dev->mal_dev = deps[EMAC_DEP_MAL_IDX].ofdev; - dev->zmii_dev = deps[EMAC_DEP_ZMII_IDX].ofdev; - dev->rgmii_dev = deps[EMAC_DEP_RGMII_IDX].ofdev; - dev->tah_dev = deps[EMAC_DEP_TAH_IDX].ofdev; - dev->mdio_dev = deps[EMAC_DEP_MDIO_IDX].ofdev; - } - if (deps[EMAC_DEP_PREV_IDX].ofdev) - of_dev_put(deps[EMAC_DEP_PREV_IDX].ofdev); - return err; -} - -static int __devinit emac_read_uint_prop(struct device_node *np, const char *name, - u32 *val, int fatal) -{ - int len; - const u32 *prop = of_get_property(np, name, &len); - if (prop == NULL || len < sizeof(u32)) { - if (fatal) - printk(KERN_ERR "%s: missing %s property\n", - np->full_name, name); - return -ENODEV; - } - *val = *prop; - return 0; -} - -static int __devinit emac_init_phy(struct emac_instance *dev) -{ - struct device_node *np = dev->ofdev->dev.of_node; - struct net_device *ndev = dev->ndev; - u32 phy_map, adv; - int i; - - dev->phy.dev = ndev; - dev->phy.mode = dev->phy_mode; - - /* PHY-less configuration. - * XXX I probably should move these settings to the dev tree - */ - if (dev->phy_address == 0xffffffff && dev->phy_map == 0xffffffff) { - emac_reset(dev); - - /* PHY-less configuration. - * XXX I probably should move these settings to the dev tree - */ - dev->phy.address = -1; - dev->phy.features = SUPPORTED_MII; - if (emac_phy_supports_gige(dev->phy_mode)) - dev->phy.features |= SUPPORTED_1000baseT_Full; - else - dev->phy.features |= SUPPORTED_100baseT_Full; - dev->phy.pause = 1; - - return 0; - } - - mutex_lock(&emac_phy_map_lock); - phy_map = dev->phy_map | busy_phy_map; - - DBG(dev, "PHY maps %08x %08x" NL, dev->phy_map, busy_phy_map); - - dev->phy.mdio_read = emac_mdio_read; - dev->phy.mdio_write = emac_mdio_write; - - /* Enable internal clock source */ -#ifdef CONFIG_PPC_DCR_NATIVE - if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) - dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); -#endif - /* PHY clock workaround */ - emac_rx_clk_tx(dev); - - /* Enable internal clock source on 440GX*/ -#ifdef CONFIG_PPC_DCR_NATIVE - if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) - dcri_clrset(SDR0, SDR0_MFR, 0, SDR0_MFR_ECS); -#endif - /* Configure EMAC with defaults so we can at least use MDIO - * This is needed mostly for 440GX - */ - if (emac_phy_gpcs(dev->phy.mode)) { - /* XXX - * Make GPCS PHY address equal to EMAC index. - * We probably should take into account busy_phy_map - * and/or phy_map here. - * - * Note that the busy_phy_map is currently global - * while it should probably be per-ASIC... - */ - dev->phy.gpcs_address = dev->gpcs_address; - if (dev->phy.gpcs_address == 0xffffffff) - dev->phy.address = dev->cell_index; - } - - emac_configure(dev); - - if (dev->phy_address != 0xffffffff) - phy_map = ~(1 << dev->phy_address); - - for (i = 0; i < 0x20; phy_map >>= 1, ++i) - if (!(phy_map & 1)) { - int r; - busy_phy_map |= 1 << i; - - /* Quick check if there is a PHY at the address */ - r = emac_mdio_read(dev->ndev, i, MII_BMCR); - if (r == 0xffff || r < 0) - continue; - if (!emac_mii_phy_probe(&dev->phy, i)) - break; - } - - /* Enable external clock source */ -#ifdef CONFIG_PPC_DCR_NATIVE - if (emac_has_feature(dev, EMAC_FTR_440GX_PHY_CLK_FIX)) - dcri_clrset(SDR0, SDR0_MFR, SDR0_MFR_ECS, 0); -#endif - mutex_unlock(&emac_phy_map_lock); - if (i == 0x20) { - printk(KERN_WARNING "%s: can't find PHY!\n", np->full_name); - return -ENXIO; - } - - /* Init PHY */ - if (dev->phy.def->ops->init) - dev->phy.def->ops->init(&dev->phy); - - /* Disable any PHY features not supported by the platform */ - dev->phy.def->features &= ~dev->phy_feat_exc; - - /* Setup initial link parameters */ - if (dev->phy.features & SUPPORTED_Autoneg) { - adv = dev->phy.features; - if (!emac_has_feature(dev, EMAC_FTR_NO_FLOW_CONTROL_40x)) - adv |= ADVERTISED_Pause | ADVERTISED_Asym_Pause; - /* Restart autonegotiation */ - dev->phy.def->ops->setup_aneg(&dev->phy, adv); - } else { - u32 f = dev->phy.def->features; - int speed = SPEED_10, fd = DUPLEX_HALF; - - /* Select highest supported speed/duplex */ - if (f & SUPPORTED_1000baseT_Full) { - speed = SPEED_1000; - fd = DUPLEX_FULL; - } else if (f & SUPPORTED_1000baseT_Half) - speed = SPEED_1000; - else if (f & SUPPORTED_100baseT_Full) { - speed = SPEED_100; - fd = DUPLEX_FULL; - } else if (f & SUPPORTED_100baseT_Half) - speed = SPEED_100; - else if (f & SUPPORTED_10baseT_Full) - fd = DUPLEX_FULL; - - /* Force link parameters */ - dev->phy.def->ops->setup_forced(&dev->phy, speed, fd); - } - return 0; -} - -static int __devinit emac_init_config(struct emac_instance *dev) -{ - struct device_node *np = dev->ofdev->dev.of_node; - const void *p; - - /* Read config from device-tree */ - if (emac_read_uint_prop(np, "mal-device", &dev->mal_ph, 1)) - return -ENXIO; - if (emac_read_uint_prop(np, "mal-tx-channel", &dev->mal_tx_chan, 1)) - return -ENXIO; - if (emac_read_uint_prop(np, "mal-rx-channel", &dev->mal_rx_chan, 1)) - return -ENXIO; - if (emac_read_uint_prop(np, "cell-index", &dev->cell_index, 1)) - return -ENXIO; - if (emac_read_uint_prop(np, "max-frame-size", &dev->max_mtu, 0)) - dev->max_mtu = 1500; - if (emac_read_uint_prop(np, "rx-fifo-size", &dev->rx_fifo_size, 0)) - dev->rx_fifo_size = 2048; - if (emac_read_uint_prop(np, "tx-fifo-size", &dev->tx_fifo_size, 0)) - dev->tx_fifo_size = 2048; - if (emac_read_uint_prop(np, "rx-fifo-size-gige", &dev->rx_fifo_size_gige, 0)) - dev->rx_fifo_size_gige = dev->rx_fifo_size; - if (emac_read_uint_prop(np, "tx-fifo-size-gige", &dev->tx_fifo_size_gige, 0)) - dev->tx_fifo_size_gige = dev->tx_fifo_size; - if (emac_read_uint_prop(np, "phy-address", &dev->phy_address, 0)) - dev->phy_address = 0xffffffff; - if (emac_read_uint_prop(np, "phy-map", &dev->phy_map, 0)) - dev->phy_map = 0xffffffff; - if (emac_read_uint_prop(np, "gpcs-address", &dev->gpcs_address, 0)) - dev->gpcs_address = 0xffffffff; - if (emac_read_uint_prop(np->parent, "clock-frequency", &dev->opb_bus_freq, 1)) - return -ENXIO; - if (emac_read_uint_prop(np, "tah-device", &dev->tah_ph, 0)) - dev->tah_ph = 0; - if (emac_read_uint_prop(np, "tah-channel", &dev->tah_port, 0)) - dev->tah_port = 0; - if (emac_read_uint_prop(np, "mdio-device", &dev->mdio_ph, 0)) - dev->mdio_ph = 0; - if (emac_read_uint_prop(np, "zmii-device", &dev->zmii_ph, 0)) - dev->zmii_ph = 0; - if (emac_read_uint_prop(np, "zmii-channel", &dev->zmii_port, 0)) - dev->zmii_port = 0xffffffff; - if (emac_read_uint_prop(np, "rgmii-device", &dev->rgmii_ph, 0)) - dev->rgmii_ph = 0; - if (emac_read_uint_prop(np, "rgmii-channel", &dev->rgmii_port, 0)) - dev->rgmii_port = 0xffffffff; - if (emac_read_uint_prop(np, "fifo-entry-size", &dev->fifo_entry_size, 0)) - dev->fifo_entry_size = 16; - if (emac_read_uint_prop(np, "mal-burst-size", &dev->mal_burst_size, 0)) - dev->mal_burst_size = 256; - - /* PHY mode needs some decoding */ - dev->phy_mode = of_get_phy_mode(np); - if (dev->phy_mode < 0) - dev->phy_mode = PHY_MODE_NA; - - /* Check EMAC version */ - if (of_device_is_compatible(np, "ibm,emac4sync")) { - dev->features |= (EMAC_FTR_EMAC4 | EMAC_FTR_EMAC4SYNC); - if (of_device_is_compatible(np, "ibm,emac-460ex") || - of_device_is_compatible(np, "ibm,emac-460gt")) - dev->features |= EMAC_FTR_460EX_PHY_CLK_FIX; - if (of_device_is_compatible(np, "ibm,emac-405ex") || - of_device_is_compatible(np, "ibm,emac-405exr")) - dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; - } else if (of_device_is_compatible(np, "ibm,emac4")) { - dev->features |= EMAC_FTR_EMAC4; - if (of_device_is_compatible(np, "ibm,emac-440gx")) - dev->features |= EMAC_FTR_440GX_PHY_CLK_FIX; - } else { - if (of_device_is_compatible(np, "ibm,emac-440ep") || - of_device_is_compatible(np, "ibm,emac-440gr")) - dev->features |= EMAC_FTR_440EP_PHY_CLK_FIX; - if (of_device_is_compatible(np, "ibm,emac-405ez")) { -#ifdef CONFIG_IBM_NEW_EMAC_NO_FLOW_CTRL - dev->features |= EMAC_FTR_NO_FLOW_CONTROL_40x; -#else - printk(KERN_ERR "%s: Flow control not disabled!\n", - np->full_name); - return -ENXIO; -#endif - } - - } - - /* Fixup some feature bits based on the device tree */ - if (of_get_property(np, "has-inverted-stacr-oc", NULL)) - dev->features |= EMAC_FTR_STACR_OC_INVERT; - if (of_get_property(np, "has-new-stacr-staopc", NULL)) - dev->features |= EMAC_FTR_HAS_NEW_STACR; - - /* CAB lacks the appropriate properties */ - if (of_device_is_compatible(np, "ibm,emac-axon")) - dev->features |= EMAC_FTR_HAS_NEW_STACR | - EMAC_FTR_STACR_OC_INVERT; - - /* Enable TAH/ZMII/RGMII features as found */ - if (dev->tah_ph != 0) { -#ifdef CONFIG_IBM_NEW_EMAC_TAH - dev->features |= EMAC_FTR_HAS_TAH; -#else - printk(KERN_ERR "%s: TAH support not enabled !\n", - np->full_name); - return -ENXIO; -#endif - } - - if (dev->zmii_ph != 0) { -#ifdef CONFIG_IBM_NEW_EMAC_ZMII - dev->features |= EMAC_FTR_HAS_ZMII; -#else - printk(KERN_ERR "%s: ZMII support not enabled !\n", - np->full_name); - return -ENXIO; -#endif - } - - if (dev->rgmii_ph != 0) { -#ifdef CONFIG_IBM_NEW_EMAC_RGMII - dev->features |= EMAC_FTR_HAS_RGMII; -#else - printk(KERN_ERR "%s: RGMII support not enabled !\n", - np->full_name); - return -ENXIO; -#endif - } - - /* Read MAC-address */ - p = of_get_property(np, "local-mac-address", NULL); - if (p == NULL) { - printk(KERN_ERR "%s: Can't find local-mac-address property\n", - np->full_name); - return -ENXIO; - } - memcpy(dev->ndev->dev_addr, p, 6); - - /* IAHT and GAHT filter parameterization */ - if (emac_has_feature(dev, EMAC_FTR_EMAC4SYNC)) { - dev->xaht_slots_shift = EMAC4SYNC_XAHT_SLOTS_SHIFT; - dev->xaht_width_shift = EMAC4SYNC_XAHT_WIDTH_SHIFT; - } else { - dev->xaht_slots_shift = EMAC4_XAHT_SLOTS_SHIFT; - dev->xaht_width_shift = EMAC4_XAHT_WIDTH_SHIFT; - } - - DBG(dev, "features : 0x%08x / 0x%08x\n", dev->features, EMAC_FTRS_POSSIBLE); - DBG(dev, "tx_fifo_size : %d (%d gige)\n", dev->tx_fifo_size, dev->tx_fifo_size_gige); - DBG(dev, "rx_fifo_size : %d (%d gige)\n", dev->rx_fifo_size, dev->rx_fifo_size_gige); - DBG(dev, "max_mtu : %d\n", dev->max_mtu); - DBG(dev, "OPB freq : %d\n", dev->opb_bus_freq); - - return 0; -} - -static const struct net_device_ops emac_netdev_ops = { - .ndo_open = emac_open, - .ndo_stop = emac_close, - .ndo_get_stats = emac_stats, - .ndo_set_multicast_list = emac_set_multicast_list, - .ndo_do_ioctl = emac_ioctl, - .ndo_tx_timeout = emac_tx_timeout, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, - .ndo_start_xmit = emac_start_xmit, - .ndo_change_mtu = eth_change_mtu, -}; - -static const struct net_device_ops emac_gige_netdev_ops = { - .ndo_open = emac_open, - .ndo_stop = emac_close, - .ndo_get_stats = emac_stats, - .ndo_set_multicast_list = emac_set_multicast_list, - .ndo_do_ioctl = emac_ioctl, - .ndo_tx_timeout = emac_tx_timeout, - .ndo_validate_addr = eth_validate_addr, - .ndo_set_mac_address = eth_mac_addr, - .ndo_start_xmit = emac_start_xmit_sg, - .ndo_change_mtu = emac_change_mtu, -}; - -static int __devinit emac_probe(struct platform_device *ofdev) -{ - struct net_device *ndev; - struct emac_instance *dev; - struct device_node *np = ofdev->dev.of_node; - struct device_node **blist = NULL; - int err, i; - - /* Skip unused/unwired EMACS. We leave the check for an unused - * property here for now, but new flat device trees should set a - * status property to "disabled" instead. - */ - if (of_get_property(np, "unused", NULL) || !of_device_is_available(np)) - return -ENODEV; - - /* Find ourselves in the bootlist if we are there */ - for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) - if (emac_boot_list[i] == np) - blist = &emac_boot_list[i]; - - /* Allocate our net_device structure */ - err = -ENOMEM; - ndev = alloc_etherdev(sizeof(struct emac_instance)); - if (!ndev) { - printk(KERN_ERR "%s: could not allocate ethernet device!\n", - np->full_name); - goto err_gone; - } - dev = netdev_priv(ndev); - dev->ndev = ndev; - dev->ofdev = ofdev; - dev->blist = blist; - SET_NETDEV_DEV(ndev, &ofdev->dev); - - /* Initialize some embedded data structures */ - mutex_init(&dev->mdio_lock); - mutex_init(&dev->link_lock); - spin_lock_init(&dev->lock); - INIT_WORK(&dev->reset_work, emac_reset_work); - - /* Init various config data based on device-tree */ - err = emac_init_config(dev); - if (err != 0) - goto err_free; - - /* Get interrupts. EMAC irq is mandatory, WOL irq is optional */ - dev->emac_irq = irq_of_parse_and_map(np, 0); - dev->wol_irq = irq_of_parse_and_map(np, 1); - if (dev->emac_irq == NO_IRQ) { - printk(KERN_ERR "%s: Can't map main interrupt\n", np->full_name); - goto err_free; - } - ndev->irq = dev->emac_irq; - - /* Map EMAC regs */ - if (of_address_to_resource(np, 0, &dev->rsrc_regs)) { - printk(KERN_ERR "%s: Can't get registers address\n", - np->full_name); - goto err_irq_unmap; - } - // TODO : request_mem_region - dev->emacp = ioremap(dev->rsrc_regs.start, - resource_size(&dev->rsrc_regs)); - if (dev->emacp == NULL) { - printk(KERN_ERR "%s: Can't map device registers!\n", - np->full_name); - err = -ENOMEM; - goto err_irq_unmap; - } - - /* Wait for dependent devices */ - err = emac_wait_deps(dev); - if (err) { - printk(KERN_ERR - "%s: Timeout waiting for dependent devices\n", - np->full_name); - /* display more info about what's missing ? */ - goto err_reg_unmap; - } - dev->mal = dev_get_drvdata(&dev->mal_dev->dev); - if (dev->mdio_dev != NULL) - dev->mdio_instance = dev_get_drvdata(&dev->mdio_dev->dev); - - /* Register with MAL */ - dev->commac.ops = &emac_commac_ops; - dev->commac.dev = dev; - dev->commac.tx_chan_mask = MAL_CHAN_MASK(dev->mal_tx_chan); - dev->commac.rx_chan_mask = MAL_CHAN_MASK(dev->mal_rx_chan); - err = mal_register_commac(dev->mal, &dev->commac); - if (err) { - printk(KERN_ERR "%s: failed to register with mal %s!\n", - np->full_name, dev->mal_dev->dev.of_node->full_name); - goto err_rel_deps; - } - dev->rx_skb_size = emac_rx_skb_size(ndev->mtu); - dev->rx_sync_size = emac_rx_sync_size(ndev->mtu); - - /* Get pointers to BD rings */ - dev->tx_desc = - dev->mal->bd_virt + mal_tx_bd_offset(dev->mal, dev->mal_tx_chan); - dev->rx_desc = - dev->mal->bd_virt + mal_rx_bd_offset(dev->mal, dev->mal_rx_chan); - - DBG(dev, "tx_desc %p" NL, dev->tx_desc); - DBG(dev, "rx_desc %p" NL, dev->rx_desc); - - /* Clean rings */ - memset(dev->tx_desc, 0, NUM_TX_BUFF * sizeof(struct mal_descriptor)); - memset(dev->rx_desc, 0, NUM_RX_BUFF * sizeof(struct mal_descriptor)); - memset(dev->tx_skb, 0, NUM_TX_BUFF * sizeof(struct sk_buff *)); - memset(dev->rx_skb, 0, NUM_RX_BUFF * sizeof(struct sk_buff *)); - - /* Attach to ZMII, if needed */ - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII) && - (err = zmii_attach(dev->zmii_dev, dev->zmii_port, &dev->phy_mode)) != 0) - goto err_unreg_commac; - - /* Attach to RGMII, if needed */ - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII) && - (err = rgmii_attach(dev->rgmii_dev, dev->rgmii_port, dev->phy_mode)) != 0) - goto err_detach_zmii; - - /* Attach to TAH, if needed */ - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH) && - (err = tah_attach(dev->tah_dev, dev->tah_port)) != 0) - goto err_detach_rgmii; - - /* Set some link defaults before we can find out real parameters */ - dev->phy.speed = SPEED_100; - dev->phy.duplex = DUPLEX_FULL; - dev->phy.autoneg = AUTONEG_DISABLE; - dev->phy.pause = dev->phy.asym_pause = 0; - dev->stop_timeout = STOP_TIMEOUT_100; - INIT_DELAYED_WORK(&dev->link_work, emac_link_timer); - - /* Find PHY if any */ - err = emac_init_phy(dev); - if (err != 0) - goto err_detach_tah; - - if (dev->tah_dev) { - ndev->hw_features = NETIF_F_IP_CSUM | NETIF_F_SG; - ndev->features |= ndev->hw_features | NETIF_F_RXCSUM; - } - ndev->watchdog_timeo = 5 * HZ; - if (emac_phy_supports_gige(dev->phy_mode)) { - ndev->netdev_ops = &emac_gige_netdev_ops; - dev->commac.ops = &emac_commac_sg_ops; - } else - ndev->netdev_ops = &emac_netdev_ops; - SET_ETHTOOL_OPS(ndev, &emac_ethtool_ops); - - netif_carrier_off(ndev); - - err = register_netdev(ndev); - if (err) { - printk(KERN_ERR "%s: failed to register net device (%d)!\n", - np->full_name, err); - goto err_detach_tah; - } - - /* Set our drvdata last as we don't want them visible until we are - * fully initialized - */ - wmb(); - dev_set_drvdata(&ofdev->dev, dev); - - /* There's a new kid in town ! Let's tell everybody */ - wake_up_all(&emac_probe_wait); - - - printk(KERN_INFO "%s: EMAC-%d %s, MAC %pM\n", - ndev->name, dev->cell_index, np->full_name, ndev->dev_addr); - - if (dev->phy_mode == PHY_MODE_SGMII) - printk(KERN_NOTICE "%s: in SGMII mode\n", ndev->name); - - if (dev->phy.address >= 0) - printk("%s: found %s PHY (0x%02x)\n", ndev->name, - dev->phy.def->name, dev->phy.address); - - emac_dbg_register(dev); - - /* Life is good */ - return 0; - - /* I have a bad feeling about this ... */ - - err_detach_tah: - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) - tah_detach(dev->tah_dev, dev->tah_port); - err_detach_rgmii: - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - rgmii_detach(dev->rgmii_dev, dev->rgmii_port); - err_detach_zmii: - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - zmii_detach(dev->zmii_dev, dev->zmii_port); - err_unreg_commac: - mal_unregister_commac(dev->mal, &dev->commac); - err_rel_deps: - emac_put_deps(dev); - err_reg_unmap: - iounmap(dev->emacp); - err_irq_unmap: - if (dev->wol_irq != NO_IRQ) - irq_dispose_mapping(dev->wol_irq); - if (dev->emac_irq != NO_IRQ) - irq_dispose_mapping(dev->emac_irq); - err_free: - free_netdev(ndev); - err_gone: - /* if we were on the bootlist, remove us as we won't show up and - * wake up all waiters to notify them in case they were waiting - * on us - */ - if (blist) { - *blist = NULL; - wake_up_all(&emac_probe_wait); - } - return err; -} - -static int __devexit emac_remove(struct platform_device *ofdev) -{ - struct emac_instance *dev = dev_get_drvdata(&ofdev->dev); - - DBG(dev, "remove" NL); - - dev_set_drvdata(&ofdev->dev, NULL); - - unregister_netdev(dev->ndev); - - cancel_work_sync(&dev->reset_work); - - if (emac_has_feature(dev, EMAC_FTR_HAS_TAH)) - tah_detach(dev->tah_dev, dev->tah_port); - if (emac_has_feature(dev, EMAC_FTR_HAS_RGMII)) - rgmii_detach(dev->rgmii_dev, dev->rgmii_port); - if (emac_has_feature(dev, EMAC_FTR_HAS_ZMII)) - zmii_detach(dev->zmii_dev, dev->zmii_port); - - mal_unregister_commac(dev->mal, &dev->commac); - emac_put_deps(dev); - - emac_dbg_unregister(dev); - iounmap(dev->emacp); - - if (dev->wol_irq != NO_IRQ) - irq_dispose_mapping(dev->wol_irq); - if (dev->emac_irq != NO_IRQ) - irq_dispose_mapping(dev->emac_irq); - - free_netdev(dev->ndev); - - return 0; -} - -/* XXX Features in here should be replaced by properties... */ -static struct of_device_id emac_match[] = -{ - { - .type = "network", - .compatible = "ibm,emac", - }, - { - .type = "network", - .compatible = "ibm,emac4", - }, - { - .type = "network", - .compatible = "ibm,emac4sync", - }, - {}, -}; -MODULE_DEVICE_TABLE(of, emac_match); - -static struct platform_driver emac_driver = { - .driver = { - .name = "emac", - .owner = THIS_MODULE, - .of_match_table = emac_match, - }, - .probe = emac_probe, - .remove = emac_remove, -}; - -static void __init emac_make_bootlist(void) -{ - struct device_node *np = NULL; - int j, max, i = 0, k; - int cell_indices[EMAC_BOOT_LIST_SIZE]; - - /* Collect EMACs */ - while((np = of_find_all_nodes(np)) != NULL) { - const u32 *idx; - - if (of_match_node(emac_match, np) == NULL) - continue; - if (of_get_property(np, "unused", NULL)) - continue; - idx = of_get_property(np, "cell-index", NULL); - if (idx == NULL) - continue; - cell_indices[i] = *idx; - emac_boot_list[i++] = of_node_get(np); - if (i >= EMAC_BOOT_LIST_SIZE) { - of_node_put(np); - break; - } - } - max = i; - - /* Bubble sort them (doh, what a creative algorithm :-) */ - for (i = 0; max > 1 && (i < (max - 1)); i++) - for (j = i; j < max; j++) { - if (cell_indices[i] > cell_indices[j]) { - np = emac_boot_list[i]; - emac_boot_list[i] = emac_boot_list[j]; - emac_boot_list[j] = np; - k = cell_indices[i]; - cell_indices[i] = cell_indices[j]; - cell_indices[j] = k; - } - } -} - -static int __init emac_init(void) -{ - int rc; - - printk(KERN_INFO DRV_DESC ", version " DRV_VERSION "\n"); - - /* Init debug stuff */ - emac_init_debug(); - - /* Build EMAC boot list */ - emac_make_bootlist(); - - /* Init submodules */ - rc = mal_init(); - if (rc) - goto err; - rc = zmii_init(); - if (rc) - goto err_mal; - rc = rgmii_init(); - if (rc) - goto err_zmii; - rc = tah_init(); - if (rc) - goto err_rgmii; - rc = platform_driver_register(&emac_driver); - if (rc) - goto err_tah; - - return 0; - - err_tah: - tah_exit(); - err_rgmii: - rgmii_exit(); - err_zmii: - zmii_exit(); - err_mal: - mal_exit(); - err: - return rc; -} - -static void __exit emac_exit(void) -{ - int i; - - platform_driver_unregister(&emac_driver); - - tah_exit(); - rgmii_exit(); - zmii_exit(); - mal_exit(); - emac_fini_debug(); - - /* Destroy EMAC boot list */ - for (i = 0; i < EMAC_BOOT_LIST_SIZE; i++) - if (emac_boot_list[i]) - of_node_put(emac_boot_list[i]); -} - -module_init(emac_init); -module_exit(emac_exit); |