/* * Agere Systems Inc. * 10/100/1000 Base-T Ethernet Driver for the ET1301 and ET131x series MACs * * Copyright © 2005 Agere Systems Inc. * All rights reserved. * http://www.agere.com * *------------------------------------------------------------------------------ * * et1310_mac.c - All code and routines pertaining to the MAC * *------------------------------------------------------------------------------ * * SOFTWARE LICENSE * * This software is provided subject to the following terms and conditions, * which you should read carefully before using the software. Using this * software indicates your acceptance of these terms and conditions. If you do * not agree with these terms and conditions, do not use the software. * * Copyright © 2005 Agere Systems Inc. * All rights reserved. * * Redistribution and use in source or binary forms, with or without * modifications, are permitted provided that the following conditions are met: * * . Redistributions of source code must retain the above copyright notice, this * list of conditions and the following Disclaimer as comments in the code as * well as in the documentation and/or other materials provided with the * distribution. * * . Redistributions in binary form must reproduce the above copyright notice, * this list of conditions and the following Disclaimer in the documentation * and/or other materials provided with the distribution. * * . Neither the name of Agere Systems Inc. nor the names of the contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * Disclaimer * * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH * DAMAGE. * */ #include "et131x_version.h" #include "et131x_defs.h" #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "et1310_phy.h" #include "et131x_adapter.h" #include "et131x.h" #define COUNTER_WRAP_28_BIT 0x10000000 #define COUNTER_WRAP_22_BIT 0x400000 #define COUNTER_WRAP_16_BIT 0x10000 #define COUNTER_WRAP_12_BIT 0x1000 #define COUNTER_MASK_28_BIT (COUNTER_WRAP_28_BIT - 1) #define COUNTER_MASK_22_BIT (COUNTER_WRAP_22_BIT - 1) #define COUNTER_MASK_16_BIT (COUNTER_WRAP_16_BIT - 1) #define COUNTER_MASK_12_BIT (COUNTER_WRAP_12_BIT - 1) /** * ConfigMacRegs1 - Initialize the first part of MAC regs * @pAdpater: pointer to our adapter structure */ void ConfigMACRegs1(struct et131x_adapter *etdev) { struct _MAC_t __iomem *pMac = &etdev->regs->mac; MAC_STATION_ADDR1_t station1; MAC_STATION_ADDR2_t station2; u32 ipg; /* First we need to reset everything. Write to MAC configuration * register 1 to perform reset. */ writel(0xC00F0000, &pMac->cfg1); /* Next lets configure the MAC Inter-packet gap register */ ipg = 0x38005860; /* IPG1 0x38 IPG2 0x58 B2B 0x60 */ ipg |= 0x50 << 8; /* ifg enforce 0x50 */ writel(ipg, &pMac->ipg); /* Next lets configure the MAC Half Duplex register */ /* BEB trunc 0xA, Ex Defer, Rexmit 0xF Coll 0x37 */ writel(0x00A1F037, &pMac->hfdp); /* Next lets configure the MAC Interface Control register */ writel(0, &pMac->if_ctrl); /* Let's move on to setting up the mii management configuration */ writel(0x07, &pMac->mii_mgmt_cfg); /* Clock reset 0x7 */ /* Next lets configure the MAC Station Address register. These * values are read from the EEPROM during initialization and stored * in the adapter structure. We write what is stored in the adapter * structure to the MAC Station Address registers high and low. This * station address is used for generating and checking pause control * packets. */ station2.bits.Octet1 = etdev->CurrentAddress[0]; station2.bits.Octet2 = etdev->CurrentAddress[1]; station1.bits.Octet3 = etdev->CurrentAddress[2]; station1.bits.Octet4 = etdev->CurrentAddress[3]; station1.bits.Octet5 = etdev->CurrentAddress[4]; station1.bits.Octet6 = etdev->CurrentAddress[5]; writel(station1.value, &pMac->station_addr_1.value); writel(station2.value, &pMac->station_addr_2.value); /* Max ethernet packet in bytes that will passed by the mac without * being truncated. Allow the MAC to pass 4 more than our max packet * size. This is 4 for the Ethernet CRC. * * Packets larger than (RegistryJumboPacket) that do not contain a * VLAN ID will be dropped by the Rx function. */ writel(etdev->RegistryJumboPacket + 4, &pMac->max_fm_len); /* clear out MAC config reset */ writel(0, &pMac->cfg1); } /** * ConfigMacRegs2 - Initialize the second part of MAC regs * @pAdpater: pointer to our adapter structure */ void ConfigMACRegs2(struct et131x_adapter *etdev) { int32_t delay = 0; struct _MAC_t __iomem *pMac = &etdev->regs->mac; u32 cfg1; u32 cfg2; u32 ifctrl; u32 ctl; ctl = readl(&etdev->regs->txmac.ctl); cfg1 = readl(&pMac->cfg1); cfg2 = readl(&pMac->cfg2); ifctrl = readl(&pMac->if_ctrl); /* Set up the if mode bits */ cfg2 &= ~0x300; if (etdev->linkspeed == TRUEPHY_SPEED_1000MBPS) { cfg2 |= 0x200; /* Phy mode bit */ ifctrl &= ~(1 << 24); } else { cfg2 |= 0x100; ifctrl |= (1 << 24); } /* We need to enable Rx/Tx */ cfg1 |= CFG1_RX_ENABLE|CFG1_TX_ENABLE|CFG1_TX_FLOW; /* Initialize loop back to off */ cfg1 &= ~(CFG1_LOOPBACK|CFG1_RX_FLOW); if (etdev->FlowControl == RxOnly || etdev->FlowControl == Both) cfg1 |= CFG1_RX_FLOW; writel(cfg1, &pMac->cfg1); /* Now we need to initialize the MAC Configuration 2 register */ /* preamble 7, check length, huge frame off, pad crc, crc enable full duplex off */ cfg2 |= 0x7016; cfg2 &= ~0x0021; /* Turn on duplex if needed */ if (etdev->duplex_mode) cfg2 |= 0x01; ifctrl &= ~(1 << 26); if (!etdev->duplex_mode) ifctrl |= (1<<26); /* Enable ghd */ writel(ifctrl, &pMac->if_ctrl); writel(cfg2, &pMac->cfg2); do { udelay(10); delay++; cfg1 = readl(&pMac->cfg1); } while ((cfg1 & CFG1_WAIT) != CFG1_WAIT && delay < 100); if (delay == 100) { dev_warn(&etdev->pdev->dev, "Syncd bits did not respond correctly cfg1 word 0x%08x\n", cfg1); } /* Enable TXMAC */ ctl |= 0x09; /* TX mac enable, FC disable */ writel(ctl, &etdev->regs->txmac.ctl); /* Ready to start the RXDMA/TXDMA engine */ if (etdev->Flags & fMP_ADAPTER_LOWER_POWER) { et131x_rx_dma_enable(etdev); et131x_tx_dma_enable(etdev); } } void ConfigRxMacRegs(struct et131x_adapter *etdev) { struct _RXMAC_t __iomem *pRxMac = &etdev->regs->rxmac; RXMAC_WOL_SA_LO_t sa_lo; RXMAC_WOL_SA_HI_t sa_hi; u32 pf_ctrl = 0; /* Disable the MAC while it is being configured (also disable WOL) */ writel(0x8, &pRxMac->ctrl); /* Initialize WOL to disabled. */ writel(0, &pRxMac->crc0); writel(0, &pRxMac->crc12); writel(0, &pRxMac->crc34); /* We need to set the WOL mask0 - mask4 next. We initialize it to * its default Values of 0x00000000 because there are not WOL masks * as of this time. */ writel(0, &pRxMac->mask0_word0); writel(0, &pRxMac->mask0_word1); writel(0, &pRxMac->mask0_word2); writel(0, &pRxMac->mask0_word3); writel(0, &pRxMac->mask1_word0); writel(0, &pRxMac->mask1_word1); writel(0, &pRxMac->mask1_word2); writel(0, &pRxMac->mask1_word3); writel(0, &pRxMac->mask2_word0); writel(0, &pRxMac->mask2_word1); writel(0, &pRxMac->mask2_word2); writel(0, &pRxMac->mask2_word3); writel(0, &pRxMac->mask3_word0); writel(0, &pRxMac->mask3_word1); writel(0, &pRxMac->mask3_word2); writel(0, &pRxMac->mask3_word3); writel(0, &pRxMac->mask4_word0); writel(0, &pRxMac->mask4_word1); writel(0, &pRxMac->mask4_word2); writel(0, &pRxMac->mask4_word3); /* Lets setup the WOL Source Address */ sa_lo.bits.sa3 = etdev->CurrentAddress[2]; sa_lo.bits.sa4 = etdev->CurrentAddress[3]; sa_lo.bits.sa5 = etdev->CurrentAddress[4]; sa_lo.bits.sa6 = etdev->CurrentAddress[5]; writel(sa_lo.value, &pRxMac->sa_lo.value); sa_hi.bits.sa1 = etdev->CurrentAddress[0]; sa_hi.bits.sa2 = etdev->CurrentAddress[1]; writel(sa_hi.value, &pRxMac->sa_hi.value); /* Disable all Packet Filtering */ writel(0, &pRxMac->pf_ctrl); /* Let's initialize the Unicast Packet filtering address */ if (etdev->PacketFilter & ET131X_PACKET_TYPE_DIRECTED) { SetupDeviceForUnicast(etdev); pf_ctrl |= 4; /* Unicast filter */ } else { writel(0, &pRxMac->uni_pf_addr1.value); writel(0, &pRxMac->uni_pf_addr2.value); writel(0, &pRxMac->uni_pf_addr3.value); } /* Let's initialize the Multicast hash */ if (!(etdev->PacketFilter & ET131X_PACKET_TYPE_ALL_MULTICAST)) { pf_ctrl |= 2; /* Multicast filter */ SetupDeviceForMulticast(etdev); } /* Runt packet filtering. Didn't work in version A silicon. */ pf_ctrl |= (NIC_MIN_PACKET_SIZE + 4) << 16; pf_ctrl |= 8; /* Fragment filter */ if (etdev->RegistryJumboPacket > 8192) /* In order to transmit jumbo packets greater than 8k, the * FIFO between RxMAC and RxDMA needs to be reduced in size * to (16k - Jumbo packet size). In order to implement this, * we must use "cut through" mode in the RxMAC, which chops * packets down into segments which are (max_size * 16). In * this case we selected 256 bytes, since this is the size of * the PCI-Express TLP's that the 1310 uses. * * seg_en on, fc_en off, size 0x10 */ writel(0x41, &pRxMac->mcif_ctrl_max_seg); else writel(0, &pRxMac->mcif_ctrl_max_seg); /* Initialize the MCIF water marks */ writel(0, &pRxMac->mcif_water_mark); /* Initialize the MIF control */ writel(0, &pRxMac->mif_ctrl); /* Initialize the Space Available Register */ writel(0, &pRxMac->space_avail); /* Initialize the the mif_ctrl register * bit 3: Receive code error. One or more nibbles were signaled as * errors during the reception of the packet. Clear this * bit in Gigabit, set it in 100Mbit. This was derived * experimentally at UNH. * bit 4: Receive CRC error. The packet's CRC did not match the * internally generated CRC. * bit 5: Receive length check error. Indicates that frame length * field value in the packet does not match the actual data * byte length and is not a type field. * bit 16: Receive frame truncated. * bit 17: Drop packet enable */ if (etdev->linkspeed == TRUEPHY_SPEED_100MBPS) writel(0x30038, &pRxMac->mif_ctrl); else writel(0x30030, &pRxMac->mif_ctrl); /* Finally we initialize RxMac to be enabled & WOL disabled. Packet * filter is always enabled since it is where the runt packets are * supposed to be dropped. For version A silicon, runt packet * dropping doesn't work, so it is disabled in the pf_ctrl register, * but we still leave the packet filter on. */ writel(pf_ctrl, &pRxMac->pf_ctrl); writel(0x9, &pRxMac->ctrl); } void ConfigTxMacRegs(struct et131x_adapter *etdev) { struct txmac_regs *txmac = &etdev->regs->txmac; /* We need to update the Control Frame Parameters * cfpt - control frame pause timer set to 64 (0x40) * cfep - control frame extended pause timer set to 0x0 */ if (etdev->FlowControl == None) writel(0, &txmac->cf_param); else writel(0x40, &txmac->cf_param); } void ConfigMacStatRegs(struct et131x_adapter *etdev) { struct macstat_regs __iomem *macstat = &etdev->regs->macstat; /* Next we need to initialize all the MAC_STAT registers to zero on * the device. */ writel(0, &macstat->RFcs); writel(0, &macstat->RAln); writel(0, &macstat->RFlr); writel(0, &macstat->RDrp); writel(0, &macstat->RCde); writel(0, &macstat->ROvr); writel(0, &macstat->RFrg); writel(0, &macstat->TScl); writel(0, &macstat->TDfr); writel(0, &macstat->TMcl); writel(0, &macstat->TLcl); writel(0, &macstat->TNcl); writel(0, &macstat->TOvr); writel(0, &macstat->TUnd); /* Unmask any counters that we want to track the overflow of. * Initially this will be all counters. It may become clear later * that we do not need to track all counters. */ writel(0xFFFFBE32, &macstat->Carry1M); writel(0xFFFE7E8B, &macstat->Carry2M); } void ConfigFlowControl(struct et131x_adapter *etdev) { if (etdev->duplex_mode == 0) { etdev->FlowControl = None; } else { char remote_pause, remote_async_pause; ET1310_PhyAccessMiBit(etdev, TRUEPHY_BIT_READ, 5, 10, &remote_pause); ET1310_PhyAccessMiBit(etdev, TRUEPHY_BIT_READ, 5, 11, &remote_async_pause); if ((remote_pause == TRUEPHY_BIT_SET) && (remote_async_pause == TRUEPHY_BIT_SET)) { etdev->FlowControl = etdev->RegistryFlowControl; } else if ((remote_pause == TRUEPHY_BIT_SET) && (remote_async_pause == TRUEPHY_BIT_CLEAR)) { if (etdev->RegistryFlowControl == Both) etdev->FlowControl = Both; else etdev->FlowControl = None; } else if ((remote_pause == TRUEPHY_BIT_CLEAR) && (remote_async_pause == TRUEPHY_BIT_CLEAR)) { etdev->FlowControl = None; } else {/* if (remote_pause == TRUEPHY_CLEAR_BIT && remote_async_pause == TRUEPHY_SET_BIT) */ if (etdev->RegistryFlowControl == Both) etdev->FlowControl = RxOnly; else etdev->FlowControl = None; } } } /** * UpdateMacStatHostCounters - Update the local copy of the statistics * @etdev: pointer to the adapter structure */ void UpdateMacStatHostCounters(struct et131x_adapter *etdev) { struct _ce_stats_t *stats = &etdev->Stats; struct macstat_regs __iomem *macstat = &etdev->regs->macstat; stats->collisions += readl(&macstat->TNcl); stats->first_collision += readl(&macstat->TScl); stats->tx_deferred += readl(&macstat->TDfr); stats->excessive_collisions += readl(&macstat->TMcl); stats->late_collisions += readl(&macstat->TLcl); stats->tx_uflo += readl(&macstat->TUnd); stats->max_pkt_error += readl(&macstat->TOvr); stats->alignment_err += readl(&macstat->RAln); stats->crc_err += readl(&macstat->RCde); stats->norcvbuf += readl(&macstat->RDrp); stats->rx_ov_flow += readl(&macstat->ROvr); stats->code_violations += readl(&macstat->RFcs); stats->length_err += readl(&macstat->RFlr); stats->other_errors += readl(&macstat->RFrg); } /** * HandleMacStatInterrupt * @etdev: pointer to the adapter structure * * One of the MACSTAT counters has wrapped. Update the local copy of * the statistics held in the adapter structure, checking the "wrap" * bit for each counter. */ void HandleMacStatInterrupt(struct et131x_adapter *etdev) { u32 Carry1; u32 Carry2; /* Read the interrupt bits from the register(s). These are Clear On * Write. */ Carry1 = readl(&etdev->regs->macstat.Carry1); Carry2 = readl(&etdev->regs->macstat.Carry2); writel(Carry1, &etdev->regs->macstat.Carry1); writel(Carry2, &etdev->regs->macstat.Carry2); /* We need to do update the host copy of all the MAC_STAT counters. * For each counter, check it's overflow bit. If the overflow bit is * set, then increment the host version of the count by one complete * revolution of the counter. This routine is called when the counter * block indicates that one of the counters has wrapped. */ if (Carry1 & (1 << 14)) etdev->Stats.code_violations += COUNTER_WRAP_16_BIT; if (Carry1 & (1 << 8)) etdev->Stats.alignment_err += COUNTER_WRAP_12_BIT; if (Carry1 & (1 << 7)) etdev->Stats.length_err += COUNTER_WRAP_16_BIT; if (Carry1 & (1 << 2)) etdev->Stats.other_errors += COUNTER_WRAP_16_BIT; if (Carry1 & (1 << 6)) etdev->Stats.crc_err += COUNTER_WRAP_16_BIT; if (Carry1 & (1 << 3)) etdev->Stats.rx_ov_flow += COUNTER_WRAP_16_BIT; if (Carry1 & (1 << 0)) etdev->Stats.norcvbuf += COUNTER_WRAP_16_BIT; if (Carry2 & (1 << 16)) etdev->Stats.max_pkt_error += COUNTER_WRAP_12_BIT; if (Carry2 & (1 << 15)) etdev->Stats.tx_uflo += COUNTER_WRAP_12_BIT; if (Carry2 & (1 << 6)) etdev->Stats.first_collision += COUNTER_WRAP_12_BIT; if (Carry2 & (1 << 8)) etdev->Stats.tx_deferred += COUNTER_WRAP_12_BIT; if (Carry2 & (1 << 5)) etdev->Stats.excessive_collisions += COUNTER_WRAP_12_BIT; if (Carry2 & (1 << 4)) etdev->Stats.late_collisions += COUNTER_WRAP_12_BIT; if (Carry2 & (1 << 2)) etdev->Stats.collisions += COUNTER_WRAP_12_BIT; } void SetupDeviceForMulticast(struct et131x_adapter *etdev) { struct _RXMAC_t __iomem *rxmac = &etdev->regs->rxmac; uint32_t nIndex; uint32_t result; uint32_t hash1 = 0; uint32_t hash2 = 0; uint32_t hash3 = 0; uint32_t hash4 = 0; u32 pm_csr; /* If ET131X_PACKET_TYPE_MULTICAST is specified, then we provision * the multi-cast LIST. If it is NOT specified, (and "ALL" is not * specified) then we should pass NO multi-cast addresses to the * driver. */ if (etdev->PacketFilter & ET131X_PACKET_TYPE_MULTICAST) { /* Loop through our multicast array and set up the device */ for (nIndex = 0; nIndex < etdev->MCAddressCount; nIndex++) { result = ether_crc(6, etdev->MCList[nIndex]); result = (result & 0x3F800000) >> 23; if (result < 32) { hash1 |= (1 << result); } else if ((31 < result) && (result < 64)) { result -= 32; hash2 |= (1 << result); } else if ((63 < result) && (result < 96)) { result -= 64; hash3 |= (1 << result); } else { result -= 96; hash4 |= (1 << result); } } } /* Write out the new hash to the device */ pm_csr = readl(&etdev->regs->global.pm_csr); if ((pm_csr & ET_PM_PHY_SW_COMA) == 0) { writel(hash1, &rxmac->multi_hash1); writel(hash2, &rxmac->multi_hash2); writel(hash3, &rxmac->multi_hash3); writel(hash4, &rxmac->multi_hash4); } } void SetupDeviceForUnicast(struct et131x_adapter *etdev) { struct _RXMAC_t __iomem *rxmac = &etdev->regs->rxmac; RXMAC_UNI_PF_ADDR1_t uni_pf1; RXMAC_UNI_PF_ADDR2_t uni_pf2; RXMAC_UNI_PF_ADDR3_t uni_pf3; u32 pm_csr; /* Set up unicast packet filter reg 3 to be the first two octets of * the MAC address for both address * * Set up unicast packet filter reg 2 to be the octets 2 - 5 of the * MAC address for second address * * Set up unicast packet filter reg 3 to be the octets 2 - 5 of the * MAC address for first address */ uni_pf3.bits.addr1_1 = etdev->CurrentAddress[0]; uni_pf3.bits.addr1_2 = etdev->CurrentAddress[1]; uni_pf3.bits.addr2_1 = etdev->CurrentAddress[0]; uni_pf3.bits.addr2_2 = etdev->CurrentAddress[1]; uni_pf2.bits.addr2_3 = etdev->CurrentAddress[2]; uni_pf2.bits.addr2_4 = etdev->CurrentAddress[3]; uni_pf2.bits.addr2_5 = etdev->CurrentAddress[4]; uni_pf2.bits.addr2_6 = etdev->CurrentAddress[5]; uni_pf1.bits.addr1_3 = etdev->CurrentAddress[2]; uni_pf1.bits.addr1_4 = etdev->CurrentAddress[3]; uni_pf1.bits.addr1_5 = etdev->CurrentAddress[4]; uni_pf1.bits.addr1_6 = etdev->CurrentAddress[5]; pm_csr = readl(&etdev->regs->global.pm_csr); if ((pm_csr & ET_PM_PHY_SW_COMA) == 0) { writel(uni_pf1.value, &rxmac->uni_pf_addr1.value); writel(uni_pf2.value, &rxmac->uni_pf_addr2.value); writel(uni_pf3.value, &rxmac->uni_pf_addr3.value); } }