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Release 4.8 drivers/net/ethernet/stmicro/stmmac/dwmac1000_core.c

/*******************************************************************************
  This is the driver for the GMAC on-chip Ethernet controller for ST SoCs.
  DWC Ether MAC 10/100/1000 Universal version 3.41a  has been used for
  developing this code.

  This only implements the mac core functions for this chip.

  Copyright (C) 2007-2009  STMicroelectronics Ltd

  This program is free software; you can redistribute it and/or modify it
  under the terms and conditions of the GNU General Public License,
  version 2, as published by the Free Software Foundation.

  This program is distributed in the hope it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  more details.

  You should have received a copy of the GNU General Public License along with
  this program; if not, write to the Free Software Foundation, Inc.,
  51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.

  The full GNU General Public License is included in this distribution in
  the file called "COPYING".

  Author: Giuseppe Cavallaro <peppe.cavallaro@st.com>
*******************************************************************************/

#include <linux/crc32.h>
#include <linux/slab.h>
#include <linux/ethtool.h>
#include <asm/io.h>
#include "stmmac_pcs.h"
#include "dwmac1000.h"


static void dwmac1000_core_init(struct mac_device_info *hw, int mtu) { void __iomem *ioaddr = hw->pcsr; u32 value = readl(ioaddr + GMAC_CONTROL); /* Configure GMAC core */ value |= GMAC_CORE_INIT; if (mtu > 1500) value |= GMAC_CONTROL_2K; if (mtu > 2000) value |= GMAC_CONTROL_JE; if (hw->ps) { value |= GMAC_CONTROL_TE; if (hw->ps == SPEED_1000) { value &= ~GMAC_CONTROL_PS; } else { value |= GMAC_CONTROL_PS; if (hw->ps == SPEED_10) value &= ~GMAC_CONTROL_FES; else value |= GMAC_CONTROL_FES; } } writel(value, ioaddr + GMAC_CONTROL); /* Mask GMAC interrupts */ value = GMAC_INT_DEFAULT_MASK; if (hw->pmt) value &= ~GMAC_INT_DISABLE_PMT; if (hw->pcs) value &= ~GMAC_INT_DISABLE_PCS; writel(value, ioaddr + GMAC_INT_MASK); #ifdef STMMAC_VLAN_TAG_USED /* Tag detection without filtering */ writel(0x0, ioaddr + GMAC_VLAN_TAG); #endif }

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giuseppe cavallarogiuseppe cavallaro13579.41%466.67%
vince bridgersvince bridgers3520.59%233.33%
Total170100.00%6100.00%


static int dwmac1000_rx_ipc_enable(struct mac_device_info *hw) { void __iomem *ioaddr = hw->pcsr; u32 value = readl(ioaddr + GMAC_CONTROL); if (hw->rx_csum) value |= GMAC_CONTROL_IPC; else value &= ~GMAC_CONTROL_IPC; writel(value, ioaddr + GMAC_CONTROL); value = readl(ioaddr + GMAC_CONTROL); return !!(value & GMAC_CONTROL_IPC); }

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giuseppe cavallarogiuseppe cavallaro6183.56%250.00%
vince bridgersvince bridgers1115.07%125.00%
deepak sikrideepak sikri11.37%125.00%
Total73100.00%4100.00%


static void dwmac1000_dump_regs(struct mac_device_info *hw) { void __iomem *ioaddr = hw->pcsr; int i; pr_info("\tDWMAC1000 regs (base addr = 0x%p)\n", ioaddr); for (i = 0; i < 55; i++) { int offset = i * 4; pr_info("\tReg No. %d (offset 0x%x): 0x%08x\n", i, offset, readl(ioaddr + offset)); } }

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giuseppe cavallarogiuseppe cavallaro5682.35%250.00%
vince bridgersvince bridgers1116.18%125.00%
david s. millerdavid s. miller11.47%125.00%
Total68100.00%4100.00%


static void dwmac1000_set_umac_addr(struct mac_device_info *hw, unsigned char *addr, unsigned int reg_n) { void __iomem *ioaddr = hw->pcsr; stmmac_set_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n), GMAC_ADDR_LOW(reg_n)); }

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giuseppe cavallarogiuseppe cavallaro3473.91%266.67%
vince bridgersvince bridgers1226.09%133.33%
Total46100.00%3100.00%


static void dwmac1000_get_umac_addr(struct mac_device_info *hw, unsigned char *addr, unsigned int reg_n) { void __iomem *ioaddr = hw->pcsr; stmmac_get_mac_addr(ioaddr, addr, GMAC_ADDR_HIGH(reg_n), GMAC_ADDR_LOW(reg_n)); }

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giuseppe cavallarogiuseppe cavallaro3473.91%266.67%
vince bridgersvince bridgers1226.09%133.33%
Total46100.00%3100.00%


static void dwmac1000_set_mchash(void __iomem *ioaddr, u32 *mcfilterbits, int mcbitslog2) { int numhashregs, regs; switch (mcbitslog2) { case 6: writel(mcfilterbits[0], ioaddr + GMAC_HASH_LOW); writel(mcfilterbits[1], ioaddr + GMAC_HASH_HIGH); return; break; case 7: numhashregs = 4; break; case 8: numhashregs = 8; break; default: pr_debug("STMMAC: err in setting mulitcast filter\n"); return; break; } for (regs = 0; regs < numhashregs; regs++) writel(mcfilterbits[regs], ioaddr + GMAC_EXTHASH_BASE + regs * 4); }

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static void dwmac1000_set_filter(struct mac_device_info *hw, struct net_device *dev) { void __iomem *ioaddr = (void __iomem *)dev->base_addr; unsigned int value = 0; unsigned int perfect_addr_number = hw->unicast_filter_entries; u32 mc_filter[8]; int mcbitslog2 = hw->mcast_bits_log2; pr_debug("%s: # mcasts %d, # unicast %d\n", __func__, netdev_mc_count(dev), netdev_uc_count(dev)); memset(mc_filter, 0, sizeof(mc_filter)); if (dev->flags & IFF_PROMISC) { value = GMAC_FRAME_FILTER_PR; } else if (dev->flags & IFF_ALLMULTI) { value = GMAC_FRAME_FILTER_PM; /* pass all multi */ } else if (!netdev_mc_empty(dev)) { struct netdev_hw_addr *ha; /* Hash filter for multicast */ value = GMAC_FRAME_FILTER_HMC; netdev_for_each_mc_addr(ha, dev) { /* The upper n bits of the calculated CRC are used to * index the contents of the hash table. The number of * bits used depends on the hardware configuration * selected at core configuration time. */ int bit_nr = bitrev32(~crc32_le(~0, ha->addr, ETH_ALEN)) >> (32 - mcbitslog2); /* The most significant bit determines the register to * use (H/L) while the other 5 bits determine the bit * within the register. */ mc_filter[bit_nr >> 5] |= 1 << (bit_nr & 31); } } dwmac1000_set_mchash(ioaddr, mc_filter, mcbitslog2); /* Handle multiple unicast addresses (perfect filtering) */ if (netdev_uc_count(dev) > perfect_addr_number) /* Switch to promiscuous mode if more than unicast * addresses are requested than supported by hardware. */ value |= GMAC_FRAME_FILTER_PR; else { int reg = 1; struct netdev_hw_addr *ha; netdev_for_each_uc_addr(ha, dev) { stmmac_set_mac_addr(ioaddr, ha->addr, GMAC_ADDR_HIGH(reg), GMAC_ADDR_LOW(reg)); reg++; } } #ifdef FRAME_FILTER_DEBUG /* Enable Receive all mode (to debug filtering_fail errors) */ value |= GMAC_FRAME_FILTER_RA; #endif writel(value, ioaddr + GMAC_FRAME_FILTER); }

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giuseppe cavallarogiuseppe cavallaro19169.96%538.46%
vince bridgersvince bridgers5720.88%430.77%
jiri pirkojiri pirko259.16%430.77%
Total273100.00%13100.00%


static void dwmac1000_flow_ctrl(struct mac_device_info *hw, unsigned int duplex, unsigned int fc, unsigned int pause_time) { void __iomem *ioaddr = hw->pcsr; /* Set flow such that DZPQ in Mac Register 6 is 0, * and unicast pause detect is enabled. */ unsigned int flow = GMAC_FLOW_CTRL_UP; pr_debug("GMAC Flow-Control:\n"); if (fc & FLOW_RX) { pr_debug("\tReceive Flow-Control ON\n"); flow |= GMAC_FLOW_CTRL_RFE; } if (fc & FLOW_TX) { pr_debug("\tTransmit Flow-Control ON\n"); flow |= GMAC_FLOW_CTRL_TFE; } if (duplex) { pr_debug("\tduplex mode: PAUSE %d\n", pause_time); flow |= (pause_time << GMAC_FLOW_CTRL_PT_SHIFT); } writel(flow, ioaddr + GMAC_FLOW_CTRL); }

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giuseppe cavallarogiuseppe cavallaro9487.04%466.67%
vince bridgersvince bridgers1412.96%233.33%
Total108100.00%6100.00%


static void dwmac1000_pmt(struct mac_device_info *hw, unsigned long mode) { void __iomem *ioaddr = hw->pcsr; unsigned int pmt = 0; if (mode & WAKE_MAGIC) { pr_debug("GMAC: WOL Magic frame\n"); pmt |= power_down | magic_pkt_en; } if (mode & WAKE_UCAST) { pr_debug("GMAC: WOL on global unicast\n"); pmt |= power_down | global_unicast | wake_up_frame_en; } writel(pmt, ioaddr + GMAC_PMT); }

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giuseppe cavallarogiuseppe cavallaro6784.81%583.33%
vince bridgersvince bridgers1215.19%116.67%
Total79100.00%6100.00%

/* RGMII or SMII interface */
static void dwmac1000_rgsmii(void __iomem *ioaddr, struct stmmac_extra_stats *x) { u32 status; status = readl(ioaddr + GMAC_RGSMIIIS); x->irq_rgmii_n++; /* Check the link status */ if (status & GMAC_RGSMIIIS_LNKSTS) { int speed_value; x->pcs_link = 1; speed_value = ((status & GMAC_RGSMIIIS_SPEED) >> GMAC_RGSMIIIS_SPEED_SHIFT); if (speed_value == GMAC_RGSMIIIS_SPEED_125) x->pcs_speed = SPEED_1000; else if (speed_value == GMAC_RGSMIIIS_SPEED_25) x->pcs_speed = SPEED_100; else x->pcs_speed = SPEED_10; x->pcs_duplex = (status & GMAC_RGSMIIIS_LNKMOD_MASK); pr_info("Link is Up - %d/%s\n", (int)x->pcs_speed, x->pcs_duplex ? "Full" : "Half"); } else { x->pcs_link = 0; pr_info("Link is Down\n"); } }

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giuseppe cavallarogiuseppe cavallaro139100.00%1100.00%
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static int dwmac1000_irq_status(struct mac_device_info *hw, struct stmmac_extra_stats *x) { void __iomem *ioaddr = hw->pcsr; u32 intr_status = readl(ioaddr + GMAC_INT_STATUS); int ret = 0; /* Not used events (e.g. MMC interrupts) are not handled. */ if ((intr_status & GMAC_INT_STATUS_MMCTIS)) x->mmc_tx_irq_n++; if (unlikely(intr_status & GMAC_INT_STATUS_MMCRIS)) x->mmc_rx_irq_n++; if (unlikely(intr_status & GMAC_INT_STATUS_MMCCSUM)) x->mmc_rx_csum_offload_irq_n++; if (unlikely(intr_status & GMAC_INT_DISABLE_PMT)) { /* clear the PMT bits 5 and 6 by reading the PMT status reg */ readl(ioaddr + GMAC_PMT); x->irq_receive_pmt_irq_n++; } /* MAC tx/rx EEE LPI entry/exit interrupts */ if (intr_status & GMAC_INT_STATUS_LPIIS) { /* Clean LPI interrupt by reading the Reg 12 */ ret = readl(ioaddr + LPI_CTRL_STATUS); if (ret & LPI_CTRL_STATUS_TLPIEN) x->irq_tx_path_in_lpi_mode_n++; if (ret & LPI_CTRL_STATUS_TLPIEX) x->irq_tx_path_exit_lpi_mode_n++; if (ret & LPI_CTRL_STATUS_RLPIEN) x->irq_rx_path_in_lpi_mode_n++; if (ret & LPI_CTRL_STATUS_RLPIEX) x->irq_rx_path_exit_lpi_mode_n++; } dwmac_pcs_isr(ioaddr, GMAC_PCS_BASE, intr_status, x); if (intr_status & PCS_RGSMIIIS_IRQ) dwmac1000_rgsmii(ioaddr, x); return ret; }

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giuseppe cavallarogiuseppe cavallaro18493.88%888.89%
vince bridgersvince bridgers126.12%111.11%
Total196100.00%9100.00%


static void dwmac1000_set_eee_mode(struct mac_device_info *hw) { void __iomem *ioaddr = hw->pcsr; u32 value; /* Enable the link status receive on RGMII, SGMII ore SMII * receive path and instruct the transmit to enter in LPI * state. */ value = readl(ioaddr + LPI_CTRL_STATUS); value |= LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_LPITXA; writel(value, ioaddr + LPI_CTRL_STATUS); }

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giuseppe cavallarogiuseppe cavallaro3777.08%266.67%
vince bridgersvince bridgers1122.92%133.33%
Total48100.00%3100.00%


static void dwmac1000_reset_eee_mode(struct mac_device_info *hw) { void __iomem *ioaddr = hw->pcsr; u32 value; value = readl(ioaddr + LPI_CTRL_STATUS); value &= ~(LPI_CTRL_STATUS_LPIEN | LPI_CTRL_STATUS_LPITXA); writel(value, ioaddr + LPI_CTRL_STATUS); }

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giuseppe cavallarogiuseppe cavallaro3978.00%150.00%
vince bridgersvince bridgers1122.00%150.00%
Total50100.00%2100.00%


static void dwmac1000_set_eee_pls(struct mac_device_info *hw, int link) { void __iomem *ioaddr = hw->pcsr; u32 value; value = readl(ioaddr + LPI_CTRL_STATUS); if (link) value |= LPI_CTRL_STATUS_PLS; else value &= ~LPI_CTRL_STATUS_PLS; writel(value, ioaddr + LPI_CTRL_STATUS); }

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giuseppe cavallarogiuseppe cavallaro4679.31%266.67%
vince bridgersvince bridgers1220.69%133.33%
Total58100.00%3100.00%


static void dwmac1000_set_eee_timer(struct mac_device_info *hw, int ls, int tw) { void __iomem *ioaddr = hw->pcsr; int value = ((tw & 0xffff)) | ((ls & 0x7ff) << 16); /* Program the timers in the LPI timer control register: * LS: minimum time (ms) for which the link * status from PHY should be ok before transmitting * the LPI pattern. * TW: minimum time (us) for which the core waits * after it has stopped transmitting the LPI pattern. */ writel(value, ioaddr + LPI_TIMER_CTRL); }

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giuseppe cavallarogiuseppe cavallaro4578.95%266.67%
vince bridgersvince bridgers1221.05%133.33%
Total57100.00%3100.00%


static void dwmac1000_ctrl_ane(void __iomem *ioaddr, bool ane, bool srgmi_ral, bool loopback) { dwmac_ctrl_ane(ioaddr, GMAC_PCS_BASE, ane, srgmi_ral, loopback); }

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static void dwmac1000_rane(void __iomem *ioaddr, bool restart) { dwmac_rane(ioaddr, GMAC_PCS_BASE, restart); }

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giuseppe cavallarogiuseppe cavallaro1982.61%266.67%
vince bridgersvince bridgers417.39%133.33%
Total23100.00%3100.00%


static void dwmac1000_get_adv_lp(void __iomem *ioaddr, struct rgmii_adv *adv) { dwmac_get_adv_lp(ioaddr, GMAC_PCS_BASE, adv); }

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giuseppe cavallarogiuseppe cavallaro25100.00%2100.00%
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static void dwmac1000_debug(void __iomem *ioaddr, struct stmmac_extra_stats *x) { u32 value = readl(ioaddr + GMAC_DEBUG); if (value & GMAC_DEBUG_TXSTSFSTS) x->mtl_tx_status_fifo_full++; if (value & GMAC_DEBUG_TXFSTS) x->mtl_tx_fifo_not_empty++; if (value & GMAC_DEBUG_TWCSTS) x->mmtl_fifo_ctrl++; if (value & GMAC_DEBUG_TRCSTS_MASK) { u32 trcsts = (value & GMAC_DEBUG_TRCSTS_MASK) >> GMAC_DEBUG_TRCSTS_SHIFT; if (trcsts == GMAC_DEBUG_TRCSTS_WRITE) x->mtl_tx_fifo_read_ctrl_write++; else if (trcsts == GMAC_DEBUG_TRCSTS_TXW) x->mtl_tx_fifo_read_ctrl_wait++; else if (trcsts == GMAC_DEBUG_TRCSTS_READ) x->mtl_tx_fifo_read_ctrl_read++; else x->mtl_tx_fifo_read_ctrl_idle++; } if (value & GMAC_DEBUG_TXPAUSED) x->mac_tx_in_pause++; if (value & GMAC_DEBUG_TFCSTS_MASK) { u32 tfcsts = (value & GMAC_DEBUG_TFCSTS_MASK) >> GMAC_DEBUG_TFCSTS_SHIFT; if (tfcsts == GMAC_DEBUG_TFCSTS_XFER) x->mac_tx_frame_ctrl_xfer++; else if (tfcsts == GMAC_DEBUG_TFCSTS_GEN_PAUSE) x->mac_tx_frame_ctrl_pause++; else if (tfcsts == GMAC_DEBUG_TFCSTS_WAIT) x->mac_tx_frame_ctrl_wait++; else x->mac_tx_frame_ctrl_idle++; } if (value & GMAC_DEBUG_TPESTS) x->mac_gmii_tx_proto_engine++; if (value & GMAC_DEBUG_RXFSTS_MASK) { u32 rxfsts = (value & GMAC_DEBUG_RXFSTS_MASK) >> GMAC_DEBUG_RRCSTS_SHIFT; if (rxfsts == GMAC_DEBUG_RXFSTS_FULL) x->mtl_rx_fifo_fill_level_full++; else if (rxfsts == GMAC_DEBUG_RXFSTS_AT) x->mtl_rx_fifo_fill_above_thresh++; else if (rxfsts == GMAC_DEBUG_RXFSTS_BT) x->mtl_rx_fifo_fill_below_thresh++; else x->mtl_rx_fifo_fill_level_empty++; } if (value & GMAC_DEBUG_RRCSTS_MASK) { u32 rrcsts = (value & GMAC_DEBUG_RRCSTS_MASK) >> GMAC_DEBUG_RRCSTS_SHIFT; if (rrcsts == GMAC_DEBUG_RRCSTS_FLUSH) x->mtl_rx_fifo_read_ctrl_flush++; else if (rrcsts == GMAC_DEBUG_RRCSTS_RSTAT) x->mtl_rx_fifo_read_ctrl_read_data++; else if (rrcsts == GMAC_DEBUG_RRCSTS_RDATA) x->mtl_rx_fifo_read_ctrl_status++; else x->mtl_rx_fifo_read_ctrl_idle++; } if (value & GMAC_DEBUG_RWCSTS) x->mtl_rx_fifo_ctrl_active++; if (value & GMAC_DEBUG_RFCFCSTS_MASK) x->mac_rx_frame_ctrl_fifo = (value & GMAC_DEBUG_RFCFCSTS_MASK) >> GMAC_DEBUG_RFCFCSTS_SHIFT; if (value & GMAC_DEBUG_RPESTS) x->mac_gmii_rx_proto_engine++; }

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static const struct stmmac_ops dwmac1000_ops = { .core_init = dwmac1000_core_init, .rx_ipc = dwmac1000_rx_ipc_enable, .dump_regs = dwmac1000_dump_regs, .host_irq_status = dwmac1000_irq_status, .set_filter = dwmac1000_set_filter, .flow_ctrl = dwmac1000_flow_ctrl, .pmt = dwmac1000_pmt, .set_umac_addr = dwmac1000_set_umac_addr, .get_umac_addr = dwmac1000_get_umac_addr, .set_eee_mode = dwmac1000_set_eee_mode, .reset_eee_mode = dwmac1000_reset_eee_mode, .set_eee_timer = dwmac1000_set_eee_timer, .set_eee_pls = dwmac1000_set_eee_pls, .debug = dwmac1000_debug, .pcs_ctrl_ane = dwmac1000_ctrl_ane, .pcs_rane = dwmac1000_rane, .pcs_get_adv_lp = dwmac1000_get_adv_lp, };
struct mac_device_info *dwmac1000_setup(void __iomem *ioaddr, int mcbins, int perfect_uc_entries, int *synopsys_id) { struct mac_device_info *mac; u32 hwid = readl(ioaddr + GMAC_VERSION); mac = kzalloc(sizeof(const struct mac_device_info), GFP_KERNEL); if (!mac) return NULL; mac->pcsr = ioaddr; mac->multicast_filter_bins = mcbins; mac->unicast_filter_entries = perfect_uc_entries; mac->mcast_bits_log2 = 0; if (mac->multicast_filter_bins) mac->mcast_bits_log2 = ilog2(mac->multicast_filter_bins); mac->mac = &dwmac1000_ops; mac->dma = &dwmac1000_dma_ops; mac->link.port = GMAC_CONTROL_PS; mac->link.duplex = GMAC_CONTROL_DM; mac->link.speed = GMAC_CONTROL_FES; mac->mii.addr = GMAC_MII_ADDR; mac->mii.data = GMAC_MII_DATA; /* Get and dump the chip ID */ *synopsys_id = stmmac_get_synopsys_id(hwid); return mac; }

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giuseppe cavallarogiuseppe cavallaro10160.84%342.86%
vince bridgersvince bridgers4728.31%228.57%
alexandre torguealexandre torgue106.02%114.29%
dan carpenterdan carpenter84.82%114.29%
Total166100.00%7100.00%


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giuseppe cavallarogiuseppe cavallaro180480.43%1851.43%
vince bridgersvince bridgers38417.12%617.14%
jiri pirkojiri pirko251.11%411.43%
alexandre torguealexandre torgue100.45%12.86%
dan carpenterdan carpenter80.36%12.86%
alexey dobriyanalexey dobriyan30.13%12.86%
deepak sikrideepak sikri30.13%12.86%
tejun heotejun heo30.13%12.86%
stephen hemmingerstephen hemminger20.09%12.86%
david s. millerdavid s. miller10.04%12.86%
Total2243100.00%35100.00%
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