--- /dev/null
+/* 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
+ *
+ * Copyright (c) 2011 Mark Einon <mark.einon@gmail.com>
+ *
+ *------------------------------------------------------------------------------
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/pci.h>
+#include <linux/module.h>
+#include <linux/types.h>
+#include <linux/kernel.h>
+
+#include <linux/sched.h>
+#include <linux/ptrace.h>
+#include <linux/slab.h>
+#include <linux/ctype.h>
+#include <linux/string.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/in.h>
+#include <linux/delay.h>
+#include <linux/bitops.h>
+#include <linux/io.h>
+
+#include <linux/netdevice.h>
+#include <linux/etherdevice.h>
+#include <linux/skbuff.h>
+#include <linux/if_arp.h>
+#include <linux/ioport.h>
+#include <linux/crc32.h>
+#include <linux/random.h>
+#include <linux/phy.h>
+
+#include "et131x.h"
+
+MODULE_AUTHOR("Victor Soriano <vjsoriano@agere.com>");
+MODULE_AUTHOR("Mark Einon <mark.einon@gmail.com>");
+MODULE_LICENSE("Dual BSD/GPL");
+MODULE_DESCRIPTION("10/100/1000 Base-T Ethernet Driver for the ET1310 by Agere Systems");
+
+/* EEPROM defines */
+#define MAX_NUM_REGISTER_POLLS 1000
+#define MAX_NUM_WRITE_RETRIES 2
+
+/* MAC defines */
+#define COUNTER_WRAP_16_BIT 0x10000
+#define COUNTER_WRAP_12_BIT 0x1000
+
+/* PCI defines */
+#define INTERNAL_MEM_SIZE 0x400 /* 1024 of internal memory */
+#define INTERNAL_MEM_RX_OFFSET 0x1FF /* 50% Tx, 50% Rx */
+
+/* ISR defines */
+/* For interrupts, normal running is:
+ * rxdma_xfr_done, phy_interrupt, mac_stat_interrupt,
+ * watchdog_interrupt & txdma_xfer_done
+ *
+ * In both cases, when flow control is enabled for either Tx or bi-direction,
+ * we additional enable rx_fbr0_low and rx_fbr1_low, so we know when the
+ * buffer rings are running low.
+ */
+#define INT_MASK_DISABLE 0xffffffff
+
+/* NOTE: Masking out MAC_STAT Interrupt for now...
+ * #define INT_MASK_ENABLE 0xfff6bf17
+ * #define INT_MASK_ENABLE_NO_FLOW 0xfff6bfd7
+ */
+#define INT_MASK_ENABLE 0xfffebf17
+#define INT_MASK_ENABLE_NO_FLOW 0xfffebfd7
+
+/* General defines */
+/* Packet and header sizes */
+#define NIC_MIN_PACKET_SIZE 60
+
+/* Multicast list size */
+#define NIC_MAX_MCAST_LIST 128
+
+/* Supported Filters */
+#define ET131X_PACKET_TYPE_DIRECTED 0x0001
+#define ET131X_PACKET_TYPE_MULTICAST 0x0002
+#define ET131X_PACKET_TYPE_BROADCAST 0x0004
+#define ET131X_PACKET_TYPE_PROMISCUOUS 0x0008
+#define ET131X_PACKET_TYPE_ALL_MULTICAST 0x0010
+
+/* Tx Timeout */
+#define ET131X_TX_TIMEOUT (1 * HZ)
+#define NIC_SEND_HANG_THRESHOLD 0
+
+/* MP_ADAPTER flags */
+#define FMP_ADAPTER_INTERRUPT_IN_USE 0x00000008
+
+/* MP_SHARED flags */
+#define FMP_ADAPTER_LOWER_POWER 0x00200000
+
+#define FMP_ADAPTER_NON_RECOVER_ERROR 0x00800000
+#define FMP_ADAPTER_HARDWARE_ERROR 0x04000000
+
+#define FMP_ADAPTER_FAIL_SEND_MASK 0x3ff00000
+
+/* Some offsets in PCI config space that are actually used. */
+#define ET1310_PCI_MAC_ADDRESS 0xA4
+#define ET1310_PCI_EEPROM_STATUS 0xB2
+#define ET1310_PCI_ACK_NACK 0xC0
+#define ET1310_PCI_REPLAY 0xC2
+#define ET1310_PCI_L0L1LATENCY 0xCF
+
+/* PCI Product IDs */
+#define ET131X_PCI_DEVICE_ID_GIG 0xED00 /* ET1310 1000 Base-T 8 */
+#define ET131X_PCI_DEVICE_ID_FAST 0xED01 /* ET1310 100 Base-T */
+
+/* Define order of magnitude converter */
+#define NANO_IN_A_MICRO 1000
+
+#define PARM_RX_NUM_BUFS_DEF 4
+#define PARM_RX_TIME_INT_DEF 10
+#define PARM_RX_MEM_END_DEF 0x2bc
+#define PARM_TX_TIME_INT_DEF 40
+#define PARM_TX_NUM_BUFS_DEF 4
+#define PARM_DMA_CACHE_DEF 0
+
+/* RX defines */
+#define FBR_CHUNKS 32
+#define MAX_DESC_PER_RING_RX 1024
+
+/* number of RFDs - default and min */
+#define RFD_LOW_WATER_MARK 40
+#define NIC_DEFAULT_NUM_RFD 1024
+#define NUM_FBRS 2
+
+#define MAX_PACKETS_HANDLED 256
+
+#define ALCATEL_MULTICAST_PKT 0x01000000
+#define ALCATEL_BROADCAST_PKT 0x02000000
+
+/* typedefs for Free Buffer Descriptors */
+struct fbr_desc {
+ u32 addr_lo;
+ u32 addr_hi;
+ u32 word2; /* Bits 10-31 reserved, 0-9 descriptor */
+};
+
+/* Packet Status Ring Descriptors
+ *
+ * Word 0:
+ *
+ * top 16 bits are from the Alcatel Status Word as enumerated in
+ * PE-MCXMAC Data Sheet IPD DS54 0210-1 (also IPD-DS80 0205-2)
+ *
+ * 0: hp hash pass
+ * 1: ipa IP checksum assist
+ * 2: ipp IP checksum pass
+ * 3: tcpa TCP checksum assist
+ * 4: tcpp TCP checksum pass
+ * 5: wol WOL Event
+ * 6: rxmac_error RXMAC Error Indicator
+ * 7: drop Drop packet
+ * 8: ft Frame Truncated
+ * 9: jp Jumbo Packet
+ * 10: vp VLAN Packet
+ * 11-15: unused
+ * 16: asw_prev_pkt_dropped e.g. IFG too small on previous
+ * 17: asw_RX_DV_event short receive event detected
+ * 18: asw_false_carrier_event bad carrier since last good packet
+ * 19: asw_code_err one or more nibbles signalled as errors
+ * 20: asw_CRC_err CRC error
+ * 21: asw_len_chk_err frame length field incorrect
+ * 22: asw_too_long frame length > 1518 bytes
+ * 23: asw_OK valid CRC + no code error
+ * 24: asw_multicast has a multicast address
+ * 25: asw_broadcast has a broadcast address
+ * 26: asw_dribble_nibble spurious bits after EOP
+ * 27: asw_control_frame is a control frame
+ * 28: asw_pause_frame is a pause frame
+ * 29: asw_unsupported_op unsupported OP code
+ * 30: asw_VLAN_tag VLAN tag detected
+ * 31: asw_long_evt Rx long event
+ *
+ * Word 1:
+ * 0-15: length length in bytes
+ * 16-25: bi Buffer Index
+ * 26-27: ri Ring Index
+ * 28-31: reserved
+ */
+struct pkt_stat_desc {
+ u32 word0;
+ u32 word1;
+};
+
+/* Typedefs for the RX DMA status word */
+
+/* rx status word 0 holds part of the status bits of the Rx DMA engine
+ * that get copied out to memory by the ET-1310. Word 0 is a 32 bit word
+ * which contains the Free Buffer ring 0 and 1 available offset.
+ *
+ * bit 0-9 FBR1 offset
+ * bit 10 Wrap flag for FBR1
+ * bit 16-25 FBR0 offset
+ * bit 26 Wrap flag for FBR0
+ */
+
+/* RXSTAT_WORD1_t structure holds part of the status bits of the Rx DMA engine
+ * that get copied out to memory by the ET-1310. Word 3 is a 32 bit word
+ * which contains the Packet Status Ring available offset.
+ *
+ * bit 0-15 reserved
+ * bit 16-27 PSRoffset
+ * bit 28 PSRwrap
+ * bit 29-31 unused
+ */
+
+/* struct rx_status_block is a structure representing the status of the Rx
+ * DMA engine it sits in free memory, and is pointed to by 0x101c / 0x1020
+ */
+struct rx_status_block {
+ u32 word0;
+ u32 word1;
+};
+
+/* Structure for look-up table holding free buffer ring pointers, addresses
+ * and state.
+ */
+struct fbr_lookup {
+ void *virt[MAX_DESC_PER_RING_RX];
+ u32 bus_high[MAX_DESC_PER_RING_RX];
+ u32 bus_low[MAX_DESC_PER_RING_RX];
+ void *ring_virtaddr;
+ dma_addr_t ring_physaddr;
+ void *mem_virtaddrs[MAX_DESC_PER_RING_RX / FBR_CHUNKS];
+ dma_addr_t mem_physaddrs[MAX_DESC_PER_RING_RX / FBR_CHUNKS];
+ u32 local_full;
+ u32 num_entries;
+ dma_addr_t buffsize;
+};
+
+/* struct rx_ring is the structure representing the adaptor's local
+ * reference(s) to the rings
+ */
+struct rx_ring {
+ struct fbr_lookup *fbr[NUM_FBRS];
+ void *ps_ring_virtaddr;
+ dma_addr_t ps_ring_physaddr;
+ u32 local_psr_full;
+ u32 psr_entries;
+
+ struct rx_status_block *rx_status_block;
+ dma_addr_t rx_status_bus;
+
+ struct list_head recv_list;
+ u32 num_ready_recv;
+
+ u32 num_rfd;
+
+ bool unfinished_receives;
+};
+
+/* TX defines */
+/* word 2 of the control bits in the Tx Descriptor ring for the ET-1310
+ *
+ * 0-15: length of packet
+ * 16-27: VLAN tag
+ * 28: VLAN CFI
+ * 29-31: VLAN priority
+ *
+ * word 3 of the control bits in the Tx Descriptor ring for the ET-1310
+ *
+ * 0: last packet in the sequence
+ * 1: first packet in the sequence
+ * 2: interrupt the processor when this pkt sent
+ * 3: Control word - no packet data
+ * 4: Issue half-duplex backpressure : XON/XOFF
+ * 5: send pause frame
+ * 6: Tx frame has error
+ * 7: append CRC
+ * 8: MAC override
+ * 9: pad packet
+ * 10: Packet is a Huge packet
+ * 11: append VLAN tag
+ * 12: IP checksum assist
+ * 13: TCP checksum assist
+ * 14: UDP checksum assist
+ */
+#define TXDESC_FLAG_LASTPKT 0x0001
+#define TXDESC_FLAG_FIRSTPKT 0x0002
+#define TXDESC_FLAG_INTPROC 0x0004
+
+/* struct tx_desc represents each descriptor on the ring */
+struct tx_desc {
+ u32 addr_hi;
+ u32 addr_lo;
+ u32 len_vlan; /* control words how to xmit the */
+ u32 flags; /* data (detailed above) */
+};
+
+/* The status of the Tx DMA engine it sits in free memory, and is pointed to
+ * by 0x101c / 0x1020. This is a DMA10 type
+ */
+
+/* TCB (Transmit Control Block: Host Side) */
+struct tcb {
+ struct tcb *next; /* Next entry in ring */
+ u32 count; /* Used to spot stuck/lost packets */
+ u32 stale; /* Used to spot stuck/lost packets */
+ struct sk_buff *skb; /* Network skb we are tied to */
+ u32 index; /* Ring indexes */
+ u32 index_start;
+};
+
+/* Structure representing our local reference(s) to the ring */
+struct tx_ring {
+ /* TCB (Transmit Control Block) memory and lists */
+ struct tcb *tcb_ring;
+
+ /* List of TCBs that are ready to be used */
+ struct tcb *tcb_qhead;
+ struct tcb *tcb_qtail;
+
+ /* list of TCBs that are currently being sent. */
+ struct tcb *send_head;
+ struct tcb *send_tail;
+ int used;
+
+ /* The actual descriptor ring */
+ struct tx_desc *tx_desc_ring;
+ dma_addr_t tx_desc_ring_pa;
+
+ /* send_idx indicates where we last wrote to in the descriptor ring. */
+ u32 send_idx;
+
+ /* The location of the write-back status block */
+ u32 *tx_status;
+ dma_addr_t tx_status_pa;
+
+ /* Packets since the last IRQ: used for interrupt coalescing */
+ int since_irq;
+};
+
+/* Do not change these values: if changed, then change also in respective
+ * TXdma and Rxdma engines
+ */
+#define NUM_DESC_PER_RING_TX 512 /* TX Do not change these values */
+#define NUM_TCB 64
+
+/* These values are all superseded by registry entries to facilitate tuning.
+ * Once the desired performance has been achieved, the optimal registry values
+ * should be re-populated to these #defines:
+ */
+#define TX_ERROR_PERIOD 1000
+
+#define LO_MARK_PERCENT_FOR_PSR 15
+#define LO_MARK_PERCENT_FOR_RX 15
+
+/* RFD (Receive Frame Descriptor) */
+struct rfd {
+ struct list_head list_node;
+ struct sk_buff *skb;
+ u32 len; /* total size of receive frame */
+ u16 bufferindex;
+ u8 ringindex;
+};
+
+/* Flow Control */
+#define FLOW_BOTH 0
+#define FLOW_TXONLY 1
+#define FLOW_RXONLY 2
+#define FLOW_NONE 3
+
+/* Struct to define some device statistics */
+struct ce_stats {
+ u32 multicast_pkts_rcvd;
+ u32 rcvd_pkts_dropped;
+
+ u32 tx_underflows;
+ u32 tx_collisions;
+ u32 tx_excessive_collisions;
+ u32 tx_first_collisions;
+ u32 tx_late_collisions;
+ u32 tx_max_pkt_errs;
+ u32 tx_deferred;
+
+ u32 rx_overflows;
+ u32 rx_length_errs;
+ u32 rx_align_errs;
+ u32 rx_crc_errs;
+ u32 rx_code_violations;
+ u32 rx_other_errs;
+
+ u32 interrupt_status;
+};
+
+/* The private adapter structure */
+struct et131x_adapter {
+ struct net_device *netdev;
+ struct pci_dev *pdev;
+ struct mii_bus *mii_bus;
+ struct phy_device *phydev;
+ struct napi_struct napi;
+
+ /* Flags that indicate current state of the adapter */
+ u32 flags;
+
+ /* local link state, to determine if a state change has occurred */
+ int link;
+
+ /* Configuration */
+ u8 rom_addr[ETH_ALEN];
+ u8 addr[ETH_ALEN];
+ bool has_eeprom;
+ u8 eeprom_data[2];
+
+ spinlock_t tcb_send_qlock; /* protects the tx_ring send tcb list */
+ spinlock_t tcb_ready_qlock; /* protects the tx_ring ready tcb list */
+ spinlock_t rcv_lock; /* protects the rx_ring receive list */
+
+ /* Packet Filter and look ahead size */
+ u32 packet_filter;
+
+ /* multicast list */
+ u32 multicast_addr_count;
+ u8 multicast_list[NIC_MAX_MCAST_LIST][ETH_ALEN];
+
+ /* Pointer to the device's PCI register space */
+ struct address_map __iomem *regs;
+
+ /* Registry parameters */
+ u8 wanted_flow; /* Flow we want for 802.3x flow control */
+ u32 registry_jumbo_packet; /* Max supported ethernet packet size */
+
+ /* Derived from the registry: */
+ u8 flow; /* flow control validated by the far-end */
+
+ /* Minimize init-time */
+ struct timer_list error_timer;
+
+ /* variable putting the phy into coma mode when boot up with no cable
+ * plugged in after 5 seconds
+ */
+ u8 boot_coma;
+
+ /* Tx Memory Variables */
+ struct tx_ring tx_ring;
+
+ /* Rx Memory Variables */
+ struct rx_ring rx_ring;
+
+ struct ce_stats stats;
+};
+
+static int eeprom_wait_ready(struct pci_dev *pdev, u32 *status)
+{
+ u32 reg;
+ int i;
+
+ /* 1. Check LBCIF Status Register for bits 6 & 3:2 all equal to 0 and
+ * bits 7,1:0 both equal to 1, at least once after reset.
+ * Subsequent operations need only to check that bits 1:0 are equal
+ * to 1 prior to starting a single byte read/write
+ */
+ for (i = 0; i < MAX_NUM_REGISTER_POLLS; i++) {
+ if (pci_read_config_dword(pdev, LBCIF_DWORD1_GROUP, ®))
+ return -EIO;
+
+ /* I2C idle and Phy Queue Avail both true */
+ if ((reg & 0x3000) == 0x3000) {
+ if (status)
+ *status = reg;
+ return reg & 0xFF;
+ }
+ }
+ return -ETIMEDOUT;
+}
+
+static int eeprom_write(struct et131x_adapter *adapter, u32 addr, u8 data)
+{
+ struct pci_dev *pdev = adapter->pdev;
+ int index = 0;
+ int retries;
+ int err = 0;
+ int writeok = 0;
+ u32 status;
+ u32 val = 0;
+
+ /* For an EEPROM, an I2C single byte write is defined as a START
+ * condition followed by the device address, EEPROM address, one byte
+ * of data and a STOP condition. The STOP condition will trigger the
+ * EEPROM's internally timed write cycle to the nonvolatile memory.
+ * All inputs are disabled during this write cycle and the EEPROM will
+ * not respond to any access until the internal write is complete.
+ */
+ err = eeprom_wait_ready(pdev, NULL);
+ if (err < 0)
+ return err;
+
+ /* 2. Write to the LBCIF Control Register: bit 7=1, bit 6=1, bit 3=0,
+ * and bits 1:0 both =0. Bit 5 should be set according to the
+ * type of EEPROM being accessed (1=two byte addressing, 0=one
+ * byte addressing).
+ */
+ if (pci_write_config_byte(pdev, LBCIF_CONTROL_REGISTER,
+ LBCIF_CONTROL_LBCIF_ENABLE |
+ LBCIF_CONTROL_I2C_WRITE))
+ return -EIO;
+
+ /* Prepare EEPROM address for Step 3 */
+ for (retries = 0; retries < MAX_NUM_WRITE_RETRIES; retries++) {
+ if (pci_write_config_dword(pdev, LBCIF_ADDRESS_REGISTER, addr))
+ break;
+ /* Write the data to the LBCIF Data Register (the I2C write
+ * will begin).
+ */
+ if (pci_write_config_byte(pdev, LBCIF_DATA_REGISTER, data))
+ break;
+ /* Monitor bit 1:0 of the LBCIF Status Register. When bits
+ * 1:0 are both equal to 1, the I2C write has completed and the
+ * internal write cycle of the EEPROM is about to start.
+ * (bits 1:0 = 01 is a legal state while waiting from both
+ * equal to 1, but bits 1:0 = 10 is invalid and implies that
+ * something is broken).
+ */
+ err = eeprom_wait_ready(pdev, &status);
+ if (err < 0)
+ return 0;
+
+ /* Check bit 3 of the LBCIF Status Register. If equal to 1,
+ * an error has occurred.Don't break here if we are revision
+ * 1, this is so we do a blind write for load bug.
+ */
+ if ((status & LBCIF_STATUS_GENERAL_ERROR) &&
+ adapter->pdev->revision == 0)
+ break;
+
+ /* Check bit 2 of the LBCIF Status Register. If equal to 1 an
+ * ACK error has occurred on the address phase of the write.
+ * This could be due to an actual hardware failure or the
+ * EEPROM may still be in its internal write cycle from a
+ * previous write. This write operation was ignored and must be
+ *repeated later.
+ */
+ if (status & LBCIF_STATUS_ACK_ERROR) {
+ /* This could be due to an actual hardware failure
+ * or the EEPROM may still be in its internal write
+ * cycle from a previous write. This write operation
+ * was ignored and must be repeated later.
+ */
+ udelay(10);
+ continue;
+ }
+
+ writeok = 1;
+ break;
+ }
+
+ udelay(10);
+
+ while (1) {
+ if (pci_write_config_byte(pdev, LBCIF_CONTROL_REGISTER,
+ LBCIF_CONTROL_LBCIF_ENABLE))
+ writeok = 0;
+
+ /* Do read until internal ACK_ERROR goes away meaning write
+ * completed
+ */
+ do {
+ pci_write_config_dword(pdev,
+ LBCIF_ADDRESS_REGISTER,
+ addr);
+ do {
+ pci_read_config_dword(pdev,
+ LBCIF_DATA_REGISTER,
+ &val);
+ } while ((val & 0x00010000) == 0);
+ } while (val & 0x00040000);
+
+ if ((val & 0xFF00) != 0xC000 || index == 10000)
+ break;
+ index++;
+ }
+ return writeok ? 0 : -EIO;
+}
+
+static int eeprom_read(struct et131x_adapter *adapter, u32 addr, u8 *pdata)
+{
+ struct pci_dev *pdev = adapter->pdev;
+ int err;
+ u32 status;
+
+ /* A single byte read is similar to the single byte write, with the
+ * exception of the data flow:
+ */
+ err = eeprom_wait_ready(pdev, NULL);
+ if (err < 0)
+ return err;
+ /* Write to the LBCIF Control Register: bit 7=1, bit 6=0, bit 3=0,
+ * and bits 1:0 both =0. Bit 5 should be set according to the type
+ * of EEPROM being accessed (1=two byte addressing, 0=one byte
+ * addressing).
+ */
+ if (pci_write_config_byte(pdev, LBCIF_CONTROL_REGISTER,
+ LBCIF_CONTROL_LBCIF_ENABLE))
+ return -EIO;
+ /* Write the address to the LBCIF Address Register (I2C read will
+ * begin).
+ */
+ if (pci_write_config_dword(pdev, LBCIF_ADDRESS_REGISTER, addr))
+ return -EIO;
+ /* Monitor bit 0 of the LBCIF Status Register. When = 1, I2C read
+ * is complete. (if bit 1 =1 and bit 0 stays = 0, a hardware failure
+ * has occurred).
+ */
+ err = eeprom_wait_ready(pdev, &status);
+ if (err < 0)
+ return err;
+ /* Regardless of error status, read data byte from LBCIF Data
+ * Register.
+ */
+ *pdata = err;
+
+ return (status & LBCIF_STATUS_ACK_ERROR) ? -EIO : 0;
+}
+
+static int et131x_init_eeprom(struct et131x_adapter *adapter)
+{
+ struct pci_dev *pdev = adapter->pdev;
+ u8 eestatus;
+
+ pci_read_config_byte(pdev, ET1310_PCI_EEPROM_STATUS, &eestatus);
+
+ /* THIS IS A WORKAROUND:
+ * I need to call this function twice to get my card in a
+ * LG M1 Express Dual running. I tried also a msleep before this
+ * function, because I thought there could be some time conditions
+ * but it didn't work. Call the whole function twice also work.
+ */
+ if (pci_read_config_byte(pdev, ET1310_PCI_EEPROM_STATUS, &eestatus)) {
+ dev_err(&pdev->dev,
+ "Could not read PCI config space for EEPROM Status\n");
+ return -EIO;
+ }
+
+ /* Determine if the error(s) we care about are present. If they are
+ * present we need to fail.
+ */
+ if (eestatus & 0x4C) {
+ int write_failed = 0;
+
+ if (pdev->revision == 0x01) {
+ int i;
+ static const u8 eedata[4] = { 0xFE, 0x13, 0x10, 0xFF };
+
+ /* Re-write the first 4 bytes if we have an eeprom
+ * present and the revision id is 1, this fixes the
+ * corruption seen with 1310 B Silicon
+ */
+ for (i = 0; i < 3; i++)
+ if (eeprom_write(adapter, i, eedata[i]) < 0)
+ write_failed = 1;
+ }
+ if (pdev->revision != 0x01 || write_failed) {
+ dev_err(&pdev->dev,
+ "Fatal EEPROM Status Error - 0x%04x\n",
+ eestatus);
+
+ /* This error could mean that there was an error
+ * reading the eeprom or that the eeprom doesn't exist.
+ * We will treat each case the same and not try to
+ * gather additional information that normally would
+ * come from the eeprom, like MAC Address
+ */
+ adapter->has_eeprom = 0;
+ return -EIO;
+ }
+ }
+ adapter->has_eeprom = 1;
+
+ /* Read the EEPROM for information regarding LED behavior. Refer to
+ * et131x_xcvr_init() for its use.
+ */
+ eeprom_read(adapter, 0x70, &adapter->eeprom_data[0]);
+ eeprom_read(adapter, 0x71, &adapter->eeprom_data[1]);
+
+ if (adapter->eeprom_data[0] != 0xcd)
+ /* Disable all optional features */
+ adapter->eeprom_data[1] = 0x00;
+
+ return 0;
+}
+
+static void et131x_rx_dma_enable(struct et131x_adapter *adapter)
+{
+ /* Setup the receive dma configuration register for normal operation */
+ u32 csr = ET_RXDMA_CSR_FBR1_ENABLE;
+ struct rx_ring *rx_ring = &adapter->rx_ring;
+
+ if (rx_ring->fbr[1]->buffsize == 4096)
+ csr |= ET_RXDMA_CSR_FBR1_SIZE_LO;
+ else if (rx_ring->fbr[1]->buffsize == 8192)
+ csr |= ET_RXDMA_CSR_FBR1_SIZE_HI;
+ else if (rx_ring->fbr[1]->buffsize == 16384)
+ csr |= ET_RXDMA_CSR_FBR1_SIZE_LO | ET_RXDMA_CSR_FBR1_SIZE_HI;
+
+ csr |= ET_RXDMA_CSR_FBR0_ENABLE;
+ if (rx_ring->fbr[0]->buffsize == 256)
+ csr |= ET_RXDMA_CSR_FBR0_SIZE_LO;
+ else if (rx_ring->fbr[0]->buffsize == 512)
+ csr |= ET_RXDMA_CSR_FBR0_SIZE_HI;
+ else if (rx_ring->fbr[0]->buffsize == 1024)
+ csr |= ET_RXDMA_CSR_FBR0_SIZE_LO | ET_RXDMA_CSR_FBR0_SIZE_HI;
+ writel(csr, &adapter->regs->rxdma.csr);
+
+ csr = readl(&adapter->regs->rxdma.csr);
+ if (csr & ET_RXDMA_CSR_HALT_STATUS) {
+ udelay(5);
+ csr = readl(&adapter->regs->rxdma.csr);
+ if (csr & ET_RXDMA_CSR_HALT_STATUS) {
+ dev_err(&adapter->pdev->dev,
+ "RX Dma failed to exit halt state. CSR 0x%08x\n",
+ csr);
+ }
+ }
+}
+
+static void et131x_rx_dma_disable(struct et131x_adapter *adapter)
+{
+ u32 csr;
+ /* Setup the receive dma configuration register */
+ writel(ET_RXDMA_CSR_HALT | ET_RXDMA_CSR_FBR1_ENABLE,
+ &adapter->regs->rxdma.csr);
+ csr = readl(&adapter->regs->rxdma.csr);
+ if (!(csr & ET_RXDMA_CSR_HALT_STATUS)) {
+ udelay(5);
+ csr = readl(&adapter->regs->rxdma.csr);
+ if (!(csr & ET_RXDMA_CSR_HALT_STATUS))
+ dev_err(&adapter->pdev->dev,
+ "RX Dma failed to enter halt state. CSR 0x%08x\n",
+ csr);
+ }
+}
+
+static void et131x_tx_dma_enable(struct et131x_adapter *adapter)
+{
+ /* Setup the transmit dma configuration register for normal
+ * operation
+ */
+ writel(ET_TXDMA_SNGL_EPKT | (PARM_DMA_CACHE_DEF << ET_TXDMA_CACHE_SHIFT),
+ &adapter->regs->txdma.csr);
+}
+
+static inline void add_10bit(u32 *v, int n)
+{
+ *v = INDEX10(*v + n) | (*v & ET_DMA10_WRAP);
+}
+
+static inline void add_12bit(u32 *v, int n)
+{
+ *v = INDEX12(*v + n) | (*v & ET_DMA12_WRAP);
+}
+
+static void et1310_config_mac_regs1(struct et131x_adapter *adapter)
+{
+ struct mac_regs __iomem *macregs = &adapter->regs->mac;
+ u32 station1;
+ u32 station2;
+ u32 ipg;
+
+ /* First we need to reset everything. Write to MAC configuration
+ * register 1 to perform reset.
+ */
+ writel(ET_MAC_CFG1_SOFT_RESET | ET_MAC_CFG1_SIM_RESET |
+ ET_MAC_CFG1_RESET_RXMC | ET_MAC_CFG1_RESET_TXMC |
+ ET_MAC_CFG1_RESET_RXFUNC | ET_MAC_CFG1_RESET_TXFUNC,
+ ¯egs->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, ¯egs->ipg);
+
+ /* Next lets configure the MAC Half Duplex register */
+ /* BEB trunc 0xA, Ex Defer, Rexmit 0xF Coll 0x37 */
+ writel(0x00A1F037, ¯egs->hfdp);
+
+ /* Next lets configure the MAC Interface Control register */
+ writel(0, ¯egs->if_ctrl);
+
+ writel(ET_MAC_MIIMGMT_CLK_RST, ¯egs->mii_mgmt_cfg);
+
+ /* 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 = (adapter->addr[1] << ET_MAC_STATION_ADDR2_OC2_SHIFT) |
+ (adapter->addr[0] << ET_MAC_STATION_ADDR2_OC1_SHIFT);
+ station1 = (adapter->addr[5] << ET_MAC_STATION_ADDR1_OC6_SHIFT) |
+ (adapter->addr[4] << ET_MAC_STATION_ADDR1_OC5_SHIFT) |
+ (adapter->addr[3] << ET_MAC_STATION_ADDR1_OC4_SHIFT) |
+ adapter->addr[2];
+ writel(station1, ¯egs->station_addr_1);
+ writel(station2, ¯egs->station_addr_2);
+
+ /* Max ethernet packet in bytes that will be 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 (registry_jumbo_packet) that do not contain a
+ * VLAN ID will be dropped by the Rx function.
+ */
+ writel(adapter->registry_jumbo_packet + 4, ¯egs->max_fm_len);
+
+ /* clear out MAC config reset */
+ writel(0, ¯egs->cfg1);
+}
+
+static void et1310_config_mac_regs2(struct et131x_adapter *adapter)
+{
+ int32_t delay = 0;
+ struct mac_regs __iomem *mac = &adapter->regs->mac;
+ struct phy_device *phydev = adapter->phydev;
+ u32 cfg1;
+ u32 cfg2;
+ u32 ifctrl;
+ u32 ctl;
+
+ ctl = readl(&adapter->regs->txmac.ctl);
+ cfg1 = readl(&mac->cfg1);
+ cfg2 = readl(&mac->cfg2);
+ ifctrl = readl(&mac->if_ctrl);
+
+ /* Set up the if mode bits */
+ cfg2 &= ~ET_MAC_CFG2_IFMODE_MASK;
+ if (phydev->speed == SPEED_1000) {
+ cfg2 |= ET_MAC_CFG2_IFMODE_1000;
+ ifctrl &= ~ET_MAC_IFCTRL_PHYMODE;
+ } else {
+ cfg2 |= ET_MAC_CFG2_IFMODE_100;
+ ifctrl |= ET_MAC_IFCTRL_PHYMODE;
+ }
+
+ cfg1 |= ET_MAC_CFG1_RX_ENABLE | ET_MAC_CFG1_TX_ENABLE |
+ ET_MAC_CFG1_TX_FLOW;
+
+ cfg1 &= ~(ET_MAC_CFG1_LOOPBACK | ET_MAC_CFG1_RX_FLOW);
+ if (adapter->flow == FLOW_RXONLY || adapter->flow == FLOW_BOTH)
+ cfg1 |= ET_MAC_CFG1_RX_FLOW;
+ writel(cfg1, &mac->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 |= 0x7 << ET_MAC_CFG2_PREAMBLE_SHIFT;
+ cfg2 |= ET_MAC_CFG2_IFMODE_LEN_CHECK;
+ cfg2 |= ET_MAC_CFG2_IFMODE_PAD_CRC;
+ cfg2 |= ET_MAC_CFG2_IFMODE_CRC_ENABLE;
+ cfg2 &= ~ET_MAC_CFG2_IFMODE_HUGE_FRAME;
+ cfg2 &= ~ET_MAC_CFG2_IFMODE_FULL_DPLX;
+
+ if (phydev->duplex == DUPLEX_FULL)
+ cfg2 |= ET_MAC_CFG2_IFMODE_FULL_DPLX;
+
+ ifctrl &= ~ET_MAC_IFCTRL_GHDMODE;
+ if (phydev->duplex == DUPLEX_HALF)
+ ifctrl |= ET_MAC_IFCTRL_GHDMODE;
+
+ writel(ifctrl, &mac->if_ctrl);
+ writel(cfg2, &mac->cfg2);
+
+ do {
+ udelay(10);
+ delay++;
+ cfg1 = readl(&mac->cfg1);
+ } while ((cfg1 & ET_MAC_CFG1_WAIT) != ET_MAC_CFG1_WAIT && delay < 100);
+
+ if (delay == 100) {
+ dev_warn(&adapter->pdev->dev,
+ "Syncd bits did not respond correctly cfg1 word 0x%08x\n",
+ cfg1);
+ }
+
+ ctl |= ET_TX_CTRL_TXMAC_ENABLE | ET_TX_CTRL_FC_DISABLE;
+ writel(ctl, &adapter->regs->txmac.ctl);
+
+ if (adapter->flags & FMP_ADAPTER_LOWER_POWER) {
+ et131x_rx_dma_enable(adapter);
+ et131x_tx_dma_enable(adapter);
+ }
+}
+
+static int et1310_in_phy_coma(struct et131x_adapter *adapter)
+{
+ u32 pmcsr = readl(&adapter->regs->global.pm_csr);
+
+ return ET_PM_PHY_SW_COMA & pmcsr ? 1 : 0;
+}
+
+static void et1310_setup_device_for_multicast(struct et131x_adapter *adapter)
+{
+ struct rxmac_regs __iomem *rxmac = &adapter->regs->rxmac;
+ u32 hash1 = 0;
+ u32 hash2 = 0;
+ u32 hash3 = 0;
+ u32 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 (adapter->packet_filter & ET131X_PACKET_TYPE_MULTICAST) {
+ int i;
+
+ /* Loop through our multicast array and set up the device */
+ for (i = 0; i < adapter->multicast_addr_count; i++) {
+ u32 result;
+
+ result = ether_crc(6, adapter->multicast_list[i]);
+
+ 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(&adapter->regs->global.pm_csr);
+ if (!et1310_in_phy_coma(adapter)) {
+ writel(hash1, &rxmac->multi_hash1);
+ writel(hash2, &rxmac->multi_hash2);
+ writel(hash3, &rxmac->multi_hash3);
+ writel(hash4, &rxmac->multi_hash4);
+ }
+}
+
+static void et1310_setup_device_for_unicast(struct et131x_adapter *adapter)
+{
+ struct rxmac_regs __iomem *rxmac = &adapter->regs->rxmac;
+ u32 uni_pf1;
+ u32 uni_pf2;
+ u32 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 = (adapter->addr[0] << ET_RX_UNI_PF_ADDR2_1_SHIFT) |
+ (adapter->addr[1] << ET_RX_UNI_PF_ADDR2_2_SHIFT) |
+ (adapter->addr[0] << ET_RX_UNI_PF_ADDR1_1_SHIFT) |
+ adapter->addr[1];
+
+ uni_pf2 = (adapter->addr[2] << ET_RX_UNI_PF_ADDR2_3_SHIFT) |
+ (adapter->addr[3] << ET_RX_UNI_PF_ADDR2_4_SHIFT) |
+ (adapter->addr[4] << ET_RX_UNI_PF_ADDR2_5_SHIFT) |
+ adapter->addr[5];
+
+ uni_pf1 = (adapter->addr[2] << ET_RX_UNI_PF_ADDR1_3_SHIFT) |
+ (adapter->addr[3] << ET_RX_UNI_PF_ADDR1_4_SHIFT) |
+ (adapter->addr[4] << ET_RX_UNI_PF_ADDR1_5_SHIFT) |
+ adapter->addr[5];
+
+ pm_csr = readl(&adapter->regs->global.pm_csr);
+ if (!et1310_in_phy_coma(adapter)) {
+ writel(uni_pf1, &rxmac->uni_pf_addr1);
+ writel(uni_pf2, &rxmac->uni_pf_addr2);
+ writel(uni_pf3, &rxmac->uni_pf_addr3);
+ }
+}
+
+static void et1310_config_rxmac_regs(struct et131x_adapter *adapter)
+{
+ struct rxmac_regs __iomem *rxmac = &adapter->regs->rxmac;
+ struct phy_device *phydev = adapter->phydev;
+ u32 sa_lo;
+ u32 sa_hi = 0;
+ u32 pf_ctrl = 0;
+ u32 __iomem *wolw;
+
+ /* Disable the MAC while it is being configured (also disable WOL) */
+ writel(0x8, &rxmac->ctrl);
+
+ /* Initialize WOL to disabled. */
+ writel(0, &rxmac->crc0);
+ writel(0, &rxmac->crc12);
+ writel(0, &rxmac->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.
+ */
+ for (wolw = &rxmac->mask0_word0; wolw <= &rxmac->mask4_word3; wolw++)
+ writel(0, wolw);
+
+ /* Lets setup the WOL Source Address */
+ sa_lo = (adapter->addr[2] << ET_RX_WOL_LO_SA3_SHIFT) |
+ (adapter->addr[3] << ET_RX_WOL_LO_SA4_SHIFT) |
+ (adapter->addr[4] << ET_RX_WOL_LO_SA5_SHIFT) |
+ adapter->addr[5];
+ writel(sa_lo, &rxmac->sa_lo);
+
+ sa_hi = (u32)(adapter->addr[0] << ET_RX_WOL_HI_SA1_SHIFT) |
+ adapter->addr[1];
+ writel(sa_hi, &rxmac->sa_hi);
+
+ /* Disable all Packet Filtering */
+ writel(0, &rxmac->pf_ctrl);
+
+ /* Let's initialize the Unicast Packet filtering address */
+ if (adapter->packet_filter & ET131X_PACKET_TYPE_DIRECTED) {
+ et1310_setup_device_for_unicast(adapter);
+ pf_ctrl |= ET_RX_PFCTRL_UNICST_FILTER_ENABLE;
+ } else {
+ writel(0, &rxmac->uni_pf_addr1);
+ writel(0, &rxmac->uni_pf_addr2);
+ writel(0, &rxmac->uni_pf_addr3);
+ }
+
+ /* Let's initialize the Multicast hash */
+ if (!(adapter->packet_filter & ET131X_PACKET_TYPE_ALL_MULTICAST)) {
+ pf_ctrl |= ET_RX_PFCTRL_MLTCST_FILTER_ENABLE;
+ et1310_setup_device_for_multicast(adapter);
+ }
+
+ /* Runt packet filtering. Didn't work in version A silicon. */
+ pf_ctrl |= (NIC_MIN_PACKET_SIZE + 4) << ET_RX_PFCTRL_MIN_PKT_SZ_SHIFT;
+ pf_ctrl |= ET_RX_PFCTRL_FRAG_FILTER_ENABLE;
+
+ if (adapter->registry_jumbo_packet > 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, &rxmac->mcif_ctrl_max_seg);
+ else
+ writel(0, &rxmac->mcif_ctrl_max_seg);
+
+ writel(0, &rxmac->mcif_water_mark);
+ writel(0, &rxmac->mif_ctrl);
+ writel(0, &rxmac->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 (phydev && phydev->speed == SPEED_100)
+ writel(0x30038, &rxmac->mif_ctrl);
+ else
+ writel(0x30030, &rxmac->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, &rxmac->pf_ctrl);
+ writel(ET_RX_CTRL_RXMAC_ENABLE | ET_RX_CTRL_WOL_DISABLE, &rxmac->ctrl);
+}
+
+static void et1310_config_txmac_regs(struct et131x_adapter *adapter)
+{
+ struct txmac_regs __iomem *txmac = &adapter->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 (adapter->flow == FLOW_NONE)
+ writel(0, &txmac->cf_param);
+ else
+ writel(0x40, &txmac->cf_param);
+}
+
+static void et1310_config_macstat_regs(struct et131x_adapter *adapter)
+{
+ struct macstat_regs __iomem *macstat = &adapter->regs->macstat;
+ u32 __iomem *reg;
+
+ /* initialize all the macstat registers to zero on the device */
+ for (reg = &macstat->txrx_0_64_byte_frames;
+ reg <= &macstat->carry_reg2; reg++)
+ writel(0, reg);
+
+ /* 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->carry_reg1_mask);
+ writel(0xFFFE7E8B, &macstat->carry_reg2_mask);
+}
+
+static int et131x_phy_mii_read(struct et131x_adapter *adapter, u8 addr,
+ u8 reg, u16 *value)
+{
+ struct mac_regs __iomem *mac = &adapter->regs->mac;
+ int status = 0;
+ u32 delay = 0;
+ u32 mii_addr;
+ u32 mii_cmd;
+ u32 mii_indicator;
+
+ /* Save a local copy of the registers we are dealing with so we can
+ * set them back
+ */
+ mii_addr = readl(&mac->mii_mgmt_addr);
+ mii_cmd = readl(&mac->mii_mgmt_cmd);
+
+ /* Stop the current operation */
+ writel(0, &mac->mii_mgmt_cmd);
+
+ /* Set up the register we need to read from on the correct PHY */
+ writel(ET_MAC_MII_ADDR(addr, reg), &mac->mii_mgmt_addr);
+
+ writel(0x1, &mac->mii_mgmt_cmd);
+
+ do {
+ udelay(50);
+ delay++;
+ mii_indicator = readl(&mac->mii_mgmt_indicator);
+ } while ((mii_indicator & ET_MAC_MGMT_WAIT) && delay < 50);
+
+ /* If we hit the max delay, we could not read the register */
+ if (delay == 50) {
+ dev_warn(&adapter->pdev->dev,
+ "reg 0x%08x could not be read\n", reg);
+ dev_warn(&adapter->pdev->dev, "status is 0x%08x\n",
+ mii_indicator);
+
+ status = -EIO;
+ goto out;
+ }
+
+ /* If we hit here we were able to read the register and we need to
+ * return the value to the caller
+ */
+ *value = readl(&mac->mii_mgmt_stat) & ET_MAC_MIIMGMT_STAT_PHYCRTL_MASK;
+
+out:
+ /* Stop the read operation */
+ writel(0, &mac->mii_mgmt_cmd);
+
+ /* set the registers we touched back to the state at which we entered
+ * this function
+ */
+ writel(mii_addr, &mac->mii_mgmt_addr);
+ writel(mii_cmd, &mac->mii_mgmt_cmd);
+
+ return status;
+}
+
+static int et131x_mii_read(struct et131x_adapter *adapter, u8 reg, u16 *value)
+{
+ struct phy_device *phydev = adapter->phydev;
+
+ if (!phydev)
+ return -EIO;
+
+ return et131x_phy_mii_read(adapter, phydev->addr, reg, value);
+}
+
+static int et131x_mii_write(struct et131x_adapter *adapter, u8 addr, u8 reg,
+ u16 value)
+{
+ struct mac_regs __iomem *mac = &adapter->regs->mac;
+ int status = 0;
+ u32 delay = 0;
+ u32 mii_addr;
+ u32 mii_cmd;
+ u32 mii_indicator;
+
+ /* Save a local copy of the registers we are dealing with so we can
+ * set them back
+ */
+ mii_addr = readl(&mac->mii_mgmt_addr);
+ mii_cmd = readl(&mac->mii_mgmt_cmd);
+
+ /* Stop the current operation */
+ writel(0, &mac->mii_mgmt_cmd);
+
+ /* Set up the register we need to write to on the correct PHY */
+ writel(ET_MAC_MII_ADDR(addr, reg), &mac->mii_mgmt_addr);
+
+ /* Add the value to write to the registers to the mac */
+ writel(value, &mac->mii_mgmt_ctrl);
+
+ do {
+ udelay(50);
+ delay++;
+ mii_indicator = readl(&mac->mii_mgmt_indicator);
+ } while ((mii_indicator & ET_MAC_MGMT_BUSY) && delay < 100);
+
+ /* If we hit the max delay, we could not write the register */
+ if (delay == 100) {
+ u16 tmp;
+
+ dev_warn(&adapter->pdev->dev,
+ "reg 0x%08x could not be written", reg);
+ dev_warn(&adapter->pdev->dev, "status is 0x%08x\n",
+ mii_indicator);
+ dev_warn(&adapter->pdev->dev, "command is 0x%08x\n",
+ readl(&mac->mii_mgmt_cmd));
+
+ et131x_mii_read(adapter, reg, &tmp);
+
+ status = -EIO;
+ }
+ /* Stop the write operation */
+ writel(0, &mac->mii_mgmt_cmd);
+
+ /* set the registers we touched back to the state at which we entered
+ * this function
+ */
+ writel(mii_addr, &mac->mii_mgmt_addr);
+ writel(mii_cmd, &mac->mii_mgmt_cmd);
+
+ return status;
+}
+
+static void et1310_phy_read_mii_bit(struct et131x_adapter *adapter,
+ u16 regnum,
+ u16 bitnum,
+ u8 *value)
+{
+ u16 reg;
+ u16 mask = 1 << bitnum;
+
+ et131x_mii_read(adapter, regnum, ®);
+
+ *value = (reg & mask) >> bitnum;
+}
+
+static void et1310_config_flow_control(struct et131x_adapter *adapter)
+{
+ struct phy_device *phydev = adapter->phydev;
+
+ if (phydev->duplex == DUPLEX_HALF) {
+ adapter->flow = FLOW_NONE;
+ } else {
+ char remote_pause, remote_async_pause;
+
+ et1310_phy_read_mii_bit(adapter, 5, 10, &remote_pause);
+ et1310_phy_read_mii_bit(adapter, 5, 11, &remote_async_pause);
+
+ if (remote_pause && remote_async_pause) {
+ adapter->flow = adapter->wanted_flow;
+ } else if (remote_pause && !remote_async_pause) {
+ if (adapter->wanted_flow == FLOW_BOTH)
+ adapter->flow = FLOW_BOTH;
+ else
+ adapter->flow = FLOW_NONE;
+ } else if (!remote_pause && !remote_async_pause) {
+ adapter->flow = FLOW_NONE;
+ } else {
+ if (adapter->wanted_flow == FLOW_BOTH)
+ adapter->flow = FLOW_RXONLY;
+ else
+ adapter->flow = FLOW_NONE;
+ }
+ }
+}
+
+/* et1310_update_macstat_host_counters - Update local copy of the statistics */
+static void et1310_update_macstat_host_counters(struct et131x_adapter *adapter)
+{
+ struct ce_stats *stats = &adapter->stats;
+ struct macstat_regs __iomem *macstat =
+ &adapter->regs->macstat;
+
+ stats->tx_collisions += readl(&macstat->tx_total_collisions);
+ stats->tx_first_collisions += readl(&macstat->tx_single_collisions);
+ stats->tx_deferred += readl(&macstat->tx_deferred);
+ stats->tx_excessive_collisions +=
+ readl(&macstat->tx_multiple_collisions);
+ stats->tx_late_collisions += readl(&macstat->tx_late_collisions);
+ stats->tx_underflows += readl(&macstat->tx_undersize_frames);
+ stats->tx_max_pkt_errs += readl(&macstat->tx_oversize_frames);
+
+ stats->rx_align_errs += readl(&macstat->rx_align_errs);
+ stats->rx_crc_errs += readl(&macstat->rx_code_errs);
+ stats->rcvd_pkts_dropped += readl(&macstat->rx_drops);
+ stats->rx_overflows += readl(&macstat->rx_oversize_packets);
+ stats->rx_code_violations += readl(&macstat->rx_fcs_errs);
+ stats->rx_length_errs += readl(&macstat->rx_frame_len_errs);
+ stats->rx_other_errs += readl(&macstat->rx_fragment_packets);
+}
+
+/* et1310_handle_macstat_interrupt
+ *
+ * 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.
+ */
+static void et1310_handle_macstat_interrupt(struct et131x_adapter *adapter)
+{
+ u32 carry_reg1;
+ u32 carry_reg2;
+
+ /* Read the interrupt bits from the register(s). These are Clear On
+ * Write.
+ */
+ carry_reg1 = readl(&adapter->regs->macstat.carry_reg1);
+ carry_reg2 = readl(&adapter->regs->macstat.carry_reg2);
+
+ writel(carry_reg1, &adapter->regs->macstat.carry_reg1);
+ writel(carry_reg2, &adapter->regs->macstat.carry_reg2);
+
+ /* 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 (carry_reg1 & (1 << 14))
+ adapter->stats.rx_code_violations += COUNTER_WRAP_16_BIT;
+ if (carry_reg1 & (1 << 8))
+ adapter->stats.rx_align_errs += COUNTER_WRAP_12_BIT;
+ if (carry_reg1 & (1 << 7))
+ adapter->stats.rx_length_errs += COUNTER_WRAP_16_BIT;
+ if (carry_reg1 & (1 << 2))
+ adapter->stats.rx_other_errs += COUNTER_WRAP_16_BIT;
+ if (carry_reg1 & (1 << 6))
+ adapter->stats.rx_crc_errs += COUNTER_WRAP_16_BIT;
+ if (carry_reg1 & (1 << 3))
+ adapter->stats.rx_overflows += COUNTER_WRAP_16_BIT;
+ if (carry_reg1 & (1 << 0))
+ adapter->stats.rcvd_pkts_dropped += COUNTER_WRAP_16_BIT;
+ if (carry_reg2 & (1 << 16))
+ adapter->stats.tx_max_pkt_errs += COUNTER_WRAP_12_BIT;
+ if (carry_reg2 & (1 << 15))
+ adapter->stats.tx_underflows += COUNTER_WRAP_12_BIT;
+ if (carry_reg2 & (1 << 6))
+ adapter->stats.tx_first_collisions += COUNTER_WRAP_12_BIT;
+ if (carry_reg2 & (1 << 8))
+ adapter->stats.tx_deferred += COUNTER_WRAP_12_BIT;
+ if (carry_reg2 & (1 << 5))
+ adapter->stats.tx_excessive_collisions += COUNTER_WRAP_12_BIT;
+ if (carry_reg2 & (1 << 4))
+ adapter->stats.tx_late_collisions += COUNTER_WRAP_12_BIT;
+ if (carry_reg2 & (1 << 2))
+ adapter->stats.tx_collisions += COUNTER_WRAP_12_BIT;
+}
+
+static int et131x_mdio_read(struct mii_bus *bus, int phy_addr, int reg)
+{
+ struct net_device *netdev = bus->priv;
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ u16 value;
+ int ret;
+
+ ret = et131x_phy_mii_read(adapter, phy_addr, reg, &value);
+
+ if (ret < 0)
+ return ret;
+
+ return value;
+}
+
+static int et131x_mdio_write(struct mii_bus *bus, int phy_addr,
+ int reg, u16 value)
+{
+ struct net_device *netdev = bus->priv;
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ return et131x_mii_write(adapter, phy_addr, reg, value);
+}
+
+/* et1310_phy_power_switch - PHY power control
+ * @adapter: device to control
+ * @down: true for off/false for back on
+ *
+ * one hundred, ten, one thousand megs
+ * How would you like to have your LAN accessed
+ * Can't you see that this code processed
+ * Phy power, phy power..
+ */
+static void et1310_phy_power_switch(struct et131x_adapter *adapter, bool down)
+{
+ u16 data;
+ struct phy_device *phydev = adapter->phydev;
+
+ et131x_mii_read(adapter, MII_BMCR, &data);
+ data &= ~BMCR_PDOWN;
+ if (down)
+ data |= BMCR_PDOWN;
+ et131x_mii_write(adapter, phydev->addr, MII_BMCR, data);
+}
+
+/* et131x_xcvr_init - Init the phy if we are setting it into force mode */
+static void et131x_xcvr_init(struct et131x_adapter *adapter)
+{
+ u16 lcr2;
+ struct phy_device *phydev = adapter->phydev;
+
+ /* Set the LED behavior such that LED 1 indicates speed (off =
+ * 10Mbits, blink = 100Mbits, on = 1000Mbits) and LED 2 indicates
+ * link and activity (on for link, blink off for activity).
+ *
+ * NOTE: Some customizations have been added here for specific
+ * vendors; The LED behavior is now determined by vendor data in the
+ * EEPROM. However, the above description is the default.
+ */
+ if ((adapter->eeprom_data[1] & 0x4) == 0) {
+ et131x_mii_read(adapter, PHY_LED_2, &lcr2);
+
+ lcr2 &= (ET_LED2_LED_100TX | ET_LED2_LED_1000T);
+ lcr2 |= (LED_VAL_LINKON_ACTIVE << LED_LINK_SHIFT);
+
+ if ((adapter->eeprom_data[1] & 0x8) == 0)
+ lcr2 |= (LED_VAL_1000BT_100BTX << LED_TXRX_SHIFT);
+ else
+ lcr2 |= (LED_VAL_LINKON << LED_TXRX_SHIFT);
+
+ et131x_mii_write(adapter, phydev->addr, PHY_LED_2, lcr2);
+ }
+}
+
+/* et131x_configure_global_regs - configure JAGCore global regs */
+static void et131x_configure_global_regs(struct et131x_adapter *adapter)
+{
+ struct global_regs __iomem *regs = &adapter->regs->global;
+
+ writel(0, ®s->rxq_start_addr);
+ writel(INTERNAL_MEM_SIZE - 1, ®s->txq_end_addr);
+
+ if (adapter->registry_jumbo_packet < 2048) {
+ /* Tx / RxDMA and Tx/Rx MAC interfaces have a 1k word
+ * block of RAM that the driver can split between Tx
+ * and Rx as it desires. Our default is to split it
+ * 50/50:
+ */
+ writel(PARM_RX_MEM_END_DEF, ®s->rxq_end_addr);
+ writel(PARM_RX_MEM_END_DEF + 1, ®s->txq_start_addr);
+ } else if (adapter->registry_jumbo_packet < 8192) {
+ /* For jumbo packets > 2k but < 8k, split 50-50. */
+ writel(INTERNAL_MEM_RX_OFFSET, ®s->rxq_end_addr);
+ writel(INTERNAL_MEM_RX_OFFSET + 1, ®s->txq_start_addr);
+ } else {
+ /* 9216 is the only packet size greater than 8k that
+ * is available. The Tx buffer has to be big enough
+ * for one whole packet on the Tx side. We'll make
+ * the Tx 9408, and give the rest to Rx
+ */
+ writel(0x01b3, ®s->rxq_end_addr);
+ writel(0x01b4, ®s->txq_start_addr);
+ }
+
+ /* Initialize the loopback register. Disable all loopbacks. */
+ writel(0, ®s->loopback);
+
+ writel(0, ®s->msi_config);
+
+ /* By default, disable the watchdog timer. It will be enabled when
+ * a packet is queued.
+ */
+ writel(0, ®s->watchdog_timer);
+}
+
+/* et131x_config_rx_dma_regs - Start of Rx_DMA init sequence */
+static void et131x_config_rx_dma_regs(struct et131x_adapter *adapter)
+{
+ struct rxdma_regs __iomem *rx_dma = &adapter->regs->rxdma;
+ struct rx_ring *rx_local = &adapter->rx_ring;
+ struct fbr_desc *fbr_entry;
+ u32 entry;
+ u32 psr_num_des;
+ unsigned long flags;
+ u8 id;
+
+ et131x_rx_dma_disable(adapter);
+
+ /* Load the completion writeback physical address */
+ writel(upper_32_bits(rx_local->rx_status_bus), &rx_dma->dma_wb_base_hi);
+ writel(lower_32_bits(rx_local->rx_status_bus), &rx_dma->dma_wb_base_lo);
+
+ memset(rx_local->rx_status_block, 0, sizeof(struct rx_status_block));
+
+ /* Set the address and parameters of the packet status ring */
+ writel(upper_32_bits(rx_local->ps_ring_physaddr), &rx_dma->psr_base_hi);
+ writel(lower_32_bits(rx_local->ps_ring_physaddr), &rx_dma->psr_base_lo);
+ writel(rx_local->psr_entries - 1, &rx_dma->psr_num_des);
+ writel(0, &rx_dma->psr_full_offset);
+
+ psr_num_des = readl(&rx_dma->psr_num_des) & ET_RXDMA_PSR_NUM_DES_MASK;
+ writel((psr_num_des * LO_MARK_PERCENT_FOR_PSR) / 100,
+ &rx_dma->psr_min_des);
+
+ spin_lock_irqsave(&adapter->rcv_lock, flags);
+
+ /* These local variables track the PSR in the adapter structure */
+ rx_local->local_psr_full = 0;
+
+ for (id = 0; id < NUM_FBRS; id++) {
+ u32 __iomem *num_des;
+ u32 __iomem *full_offset;
+ u32 __iomem *min_des;
+ u32 __iomem *base_hi;
+ u32 __iomem *base_lo;
+ struct fbr_lookup *fbr = rx_local->fbr[id];
+
+ if (id == 0) {
+ num_des = &rx_dma->fbr0_num_des;
+ full_offset = &rx_dma->fbr0_full_offset;
+ min_des = &rx_dma->fbr0_min_des;
+ base_hi = &rx_dma->fbr0_base_hi;
+ base_lo = &rx_dma->fbr0_base_lo;
+ } else {
+ num_des = &rx_dma->fbr1_num_des;
+ full_offset = &rx_dma->fbr1_full_offset;
+ min_des = &rx_dma->fbr1_min_des;
+ base_hi = &rx_dma->fbr1_base_hi;
+ base_lo = &rx_dma->fbr1_base_lo;
+ }
+
+ /* Now's the best time to initialize FBR contents */
+ fbr_entry = fbr->ring_virtaddr;
+ for (entry = 0; entry < fbr->num_entries; entry++) {
+ fbr_entry->addr_hi = fbr->bus_high[entry];
+ fbr_entry->addr_lo = fbr->bus_low[entry];
+ fbr_entry->word2 = entry;
+ fbr_entry++;
+ }
+
+ /* Set the address and parameters of Free buffer ring 1 and 0 */
+ writel(upper_32_bits(fbr->ring_physaddr), base_hi);
+ writel(lower_32_bits(fbr->ring_physaddr), base_lo);
+ writel(fbr->num_entries - 1, num_des);
+ writel(ET_DMA10_WRAP, full_offset);
+
+ /* This variable tracks the free buffer ring 1 full position,
+ * so it has to match the above.
+ */
+ fbr->local_full = ET_DMA10_WRAP;
+ writel(((fbr->num_entries * LO_MARK_PERCENT_FOR_RX) / 100) - 1,
+ min_des);
+ }
+
+ /* Program the number of packets we will receive before generating an
+ * interrupt.
+ * For version B silicon, this value gets updated once autoneg is
+ *complete.
+ */
+ writel(PARM_RX_NUM_BUFS_DEF, &rx_dma->num_pkt_done);
+
+ /* The "time_done" is not working correctly to coalesce interrupts
+ * after a given time period, but rather is giving us an interrupt
+ * regardless of whether we have received packets.
+ * This value gets updated once autoneg is complete.
+ */
+ writel(PARM_RX_TIME_INT_DEF, &rx_dma->max_pkt_time);
+
+ spin_unlock_irqrestore(&adapter->rcv_lock, flags);
+}
+
+/* et131x_config_tx_dma_regs - Set up the tx dma section of the JAGCore.
+ *
+ * Configure the transmit engine with the ring buffers we have created
+ * and prepare it for use.
+ */
+static void et131x_config_tx_dma_regs(struct et131x_adapter *adapter)
+{
+ struct txdma_regs __iomem *txdma = &adapter->regs->txdma;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ /* Load the hardware with the start of the transmit descriptor ring. */
+ writel(upper_32_bits(tx_ring->tx_desc_ring_pa), &txdma->pr_base_hi);
+ writel(lower_32_bits(tx_ring->tx_desc_ring_pa), &txdma->pr_base_lo);
+
+ /* Initialise the transmit DMA engine */
+ writel(NUM_DESC_PER_RING_TX - 1, &txdma->pr_num_des);
+
+ /* Load the completion writeback physical address */
+ writel(upper_32_bits(tx_ring->tx_status_pa), &txdma->dma_wb_base_hi);
+ writel(lower_32_bits(tx_ring->tx_status_pa), &txdma->dma_wb_base_lo);
+
+ *tx_ring->tx_status = 0;
+
+ writel(0, &txdma->service_request);
+ tx_ring->send_idx = 0;
+}
+
+/* et131x_adapter_setup - Set the adapter up as per cassini+ documentation */
+static void et131x_adapter_setup(struct et131x_adapter *adapter)
+{
+ et131x_configure_global_regs(adapter);
+ et1310_config_mac_regs1(adapter);
+
+ /* Configure the MMC registers */
+ /* All we need to do is initialize the Memory Control Register */
+ writel(ET_MMC_ENABLE, &adapter->regs->mmc.mmc_ctrl);
+
+ et1310_config_rxmac_regs(adapter);
+ et1310_config_txmac_regs(adapter);
+
+ et131x_config_rx_dma_regs(adapter);
+ et131x_config_tx_dma_regs(adapter);
+
+ et1310_config_macstat_regs(adapter);
+
+ et1310_phy_power_switch(adapter, 0);
+ et131x_xcvr_init(adapter);
+}
+
+/* et131x_soft_reset - Issue soft reset to the hardware, complete for ET1310 */
+static void et131x_soft_reset(struct et131x_adapter *adapter)
+{
+ u32 reg;
+
+ /* Disable MAC Core */
+ reg = ET_MAC_CFG1_SOFT_RESET | ET_MAC_CFG1_SIM_RESET |
+ ET_MAC_CFG1_RESET_RXMC | ET_MAC_CFG1_RESET_TXMC |
+ ET_MAC_CFG1_RESET_RXFUNC | ET_MAC_CFG1_RESET_TXFUNC;
+ writel(reg, &adapter->regs->mac.cfg1);
+
+ reg = ET_RESET_ALL;
+ writel(reg, &adapter->regs->global.sw_reset);
+
+ reg = ET_MAC_CFG1_RESET_RXMC | ET_MAC_CFG1_RESET_TXMC |
+ ET_MAC_CFG1_RESET_RXFUNC | ET_MAC_CFG1_RESET_TXFUNC;
+ writel(reg, &adapter->regs->mac.cfg1);
+ writel(0, &adapter->regs->mac.cfg1);
+}
+
+static void et131x_enable_interrupts(struct et131x_adapter *adapter)
+{
+ u32 mask;
+
+ if (adapter->flow == FLOW_TXONLY || adapter->flow == FLOW_BOTH)
+ mask = INT_MASK_ENABLE;
+ else
+ mask = INT_MASK_ENABLE_NO_FLOW;
+
+ writel(mask, &adapter->regs->global.int_mask);
+}
+
+static void et131x_disable_interrupts(struct et131x_adapter *adapter)
+{
+ writel(INT_MASK_DISABLE, &adapter->regs->global.int_mask);
+}
+
+static void et131x_tx_dma_disable(struct et131x_adapter *adapter)
+{
+ /* Setup the transmit dma configuration register */
+ writel(ET_TXDMA_CSR_HALT | ET_TXDMA_SNGL_EPKT,
+ &adapter->regs->txdma.csr);
+}
+
+static void et131x_enable_txrx(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ et131x_rx_dma_enable(adapter);
+ et131x_tx_dma_enable(adapter);
+
+ if (adapter->flags & FMP_ADAPTER_INTERRUPT_IN_USE)
+ et131x_enable_interrupts(adapter);
+
+ netif_start_queue(netdev);
+}
+
+static void et131x_disable_txrx(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ netif_stop_queue(netdev);
+
+ et131x_rx_dma_disable(adapter);
+ et131x_tx_dma_disable(adapter);
+
+ et131x_disable_interrupts(adapter);
+}
+
+static void et131x_init_send(struct et131x_adapter *adapter)
+{
+ int i;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+ struct tcb *tcb = tx_ring->tcb_ring;
+
+ tx_ring->tcb_qhead = tcb;
+
+ memset(tcb, 0, sizeof(struct tcb) * NUM_TCB);
+
+ for (i = 0; i < NUM_TCB; i++) {
+ tcb->next = tcb + 1;
+ tcb++;
+ }
+
+ tcb--;
+ tx_ring->tcb_qtail = tcb;
+ tcb->next = NULL;
+ /* Curr send queue should now be empty */
+ tx_ring->send_head = NULL;
+ tx_ring->send_tail = NULL;
+}
+
+/* et1310_enable_phy_coma
+ *
+ * driver receive an phy status change interrupt while in D0 and check that
+ * phy_status is down.
+ *
+ * -- gate off JAGCore;
+ * -- set gigE PHY in Coma mode
+ * -- wake on phy_interrupt; Perform software reset JAGCore,
+ * re-initialize jagcore and gigE PHY
+ */
+static void et1310_enable_phy_coma(struct et131x_adapter *adapter)
+{
+ u32 pmcsr = readl(&adapter->regs->global.pm_csr);
+
+ /* Stop sending packets. */
+ adapter->flags |= FMP_ADAPTER_LOWER_POWER;
+
+ /* Wait for outstanding Receive packets */
+ et131x_disable_txrx(adapter->netdev);
+
+ /* Gate off JAGCore 3 clock domains */
+ pmcsr &= ~ET_PMCSR_INIT;
+ writel(pmcsr, &adapter->regs->global.pm_csr);
+
+ /* Program gigE PHY in to Coma mode */
+ pmcsr |= ET_PM_PHY_SW_COMA;
+ writel(pmcsr, &adapter->regs->global.pm_csr);
+}
+
+static void et1310_disable_phy_coma(struct et131x_adapter *adapter)
+{
+ u32 pmcsr;
+
+ pmcsr = readl(&adapter->regs->global.pm_csr);
+
+ /* Disable phy_sw_coma register and re-enable JAGCore clocks */
+ pmcsr |= ET_PMCSR_INIT;
+ pmcsr &= ~ET_PM_PHY_SW_COMA;
+ writel(pmcsr, &adapter->regs->global.pm_csr);
+
+ /* Restore the GbE PHY speed and duplex modes;
+ * Reset JAGCore; re-configure and initialize JAGCore and gigE PHY
+ */
+
+ /* Re-initialize the send structures */
+ et131x_init_send(adapter);
+
+ /* Bring the device back to the state it was during init prior to
+ * autonegotiation being complete. This way, when we get the auto-neg
+ * complete interrupt, we can complete init by calling ConfigMacREGS2.
+ */
+ et131x_soft_reset(adapter);
+
+ et131x_adapter_setup(adapter);
+
+ /* Allow Tx to restart */
+ adapter->flags &= ~FMP_ADAPTER_LOWER_POWER;
+
+ et131x_enable_txrx(adapter->netdev);
+}
+
+static inline u32 bump_free_buff_ring(u32 *free_buff_ring, u32 limit)
+{
+ u32 tmp_free_buff_ring = *free_buff_ring;
+
+ tmp_free_buff_ring++;
+ /* This works for all cases where limit < 1024. The 1023 case
+ * works because 1023++ is 1024 which means the if condition is not
+ * taken but the carry of the bit into the wrap bit toggles the wrap
+ * value correctly
+ */
+ if ((tmp_free_buff_ring & ET_DMA10_MASK) > limit) {
+ tmp_free_buff_ring &= ~ET_DMA10_MASK;
+ tmp_free_buff_ring ^= ET_DMA10_WRAP;
+ }
+ /* For the 1023 case */
+ tmp_free_buff_ring &= (ET_DMA10_MASK | ET_DMA10_WRAP);
+ *free_buff_ring = tmp_free_buff_ring;
+ return tmp_free_buff_ring;
+}
+
+/* et131x_rx_dma_memory_alloc
+ *
+ * Allocates Free buffer ring 1 for sure, free buffer ring 0 if required,
+ * and the Packet Status Ring.
+ */
+static int et131x_rx_dma_memory_alloc(struct et131x_adapter *adapter)
+{
+ u8 id;
+ u32 i, j;
+ u32 bufsize;
+ u32 psr_size;
+ u32 fbr_chunksize;
+ struct rx_ring *rx_ring = &adapter->rx_ring;
+ struct fbr_lookup *fbr;
+
+ /* Alloc memory for the lookup table */
+ rx_ring->fbr[0] = kzalloc(sizeof(*fbr), GFP_KERNEL);
+ if (rx_ring->fbr[0] == NULL)
+ return -ENOMEM;
+ rx_ring->fbr[1] = kzalloc(sizeof(*fbr), GFP_KERNEL);
+ if (rx_ring->fbr[1] == NULL)
+ return -ENOMEM;
+
+ /* The first thing we will do is configure the sizes of the buffer
+ * rings. These will change based on jumbo packet support. Larger
+ * jumbo packets increases the size of each entry in FBR0, and the
+ * number of entries in FBR0, while at the same time decreasing the
+ * number of entries in FBR1.
+ *
+ * FBR1 holds "large" frames, FBR0 holds "small" frames. If FBR1
+ * entries are huge in order to accommodate a "jumbo" frame, then it
+ * will have less entries. Conversely, FBR1 will now be relied upon
+ * to carry more "normal" frames, thus it's entry size also increases
+ * and the number of entries goes up too (since it now carries
+ * "small" + "regular" packets.
+ *
+ * In this scheme, we try to maintain 512 entries between the two
+ * rings. Also, FBR1 remains a constant size - when it's size doubles
+ * the number of entries halves. FBR0 increases in size, however.
+ */
+ if (adapter->registry_jumbo_packet < 2048) {
+ rx_ring->fbr[0]->buffsize = 256;
+ rx_ring->fbr[0]->num_entries = 512;
+ rx_ring->fbr[1]->buffsize = 2048;
+ rx_ring->fbr[1]->num_entries = 512;
+ } else if (adapter->registry_jumbo_packet < 4096) {
+ rx_ring->fbr[0]->buffsize = 512;
+ rx_ring->fbr[0]->num_entries = 1024;
+ rx_ring->fbr[1]->buffsize = 4096;
+ rx_ring->fbr[1]->num_entries = 512;
+ } else {
+ rx_ring->fbr[0]->buffsize = 1024;
+ rx_ring->fbr[0]->num_entries = 768;
+ rx_ring->fbr[1]->buffsize = 16384;
+ rx_ring->fbr[1]->num_entries = 128;
+ }
+
+ rx_ring->psr_entries = rx_ring->fbr[0]->num_entries +
+ rx_ring->fbr[1]->num_entries;
+
+ for (id = 0; id < NUM_FBRS; id++) {
+ fbr = rx_ring->fbr[id];
+ /* Allocate an area of memory for Free Buffer Ring */
+ bufsize = sizeof(struct fbr_desc) * fbr->num_entries;
+ fbr->ring_virtaddr = dma_alloc_coherent(&adapter->pdev->dev,
+ bufsize,
+ &fbr->ring_physaddr,
+ GFP_KERNEL);
+ if (!fbr->ring_virtaddr) {
+ dev_err(&adapter->pdev->dev,
+ "Cannot alloc memory for Free Buffer Ring %d\n",
+ id);
+ return -ENOMEM;
+ }
+ }
+
+ for (id = 0; id < NUM_FBRS; id++) {
+ fbr = rx_ring->fbr[id];
+ fbr_chunksize = (FBR_CHUNKS * fbr->buffsize);
+
+ for (i = 0; i < fbr->num_entries / FBR_CHUNKS; i++) {
+ dma_addr_t fbr_physaddr;
+
+ fbr->mem_virtaddrs[i] = dma_alloc_coherent(
+ &adapter->pdev->dev, fbr_chunksize,
+ &fbr->mem_physaddrs[i],
+ GFP_KERNEL);
+
+ if (!fbr->mem_virtaddrs[i]) {
+ dev_err(&adapter->pdev->dev,
+ "Could not alloc memory\n");
+ return -ENOMEM;
+ }
+
+ /* See NOTE in "Save Physical Address" comment above */
+ fbr_physaddr = fbr->mem_physaddrs[i];
+
+ for (j = 0; j < FBR_CHUNKS; j++) {
+ u32 k = (i * FBR_CHUNKS) + j;
+
+ /* Save the Virtual address of this index for
+ * quick access later
+ */
+ fbr->virt[k] = (u8 *)fbr->mem_virtaddrs[i] +
+ (j * fbr->buffsize);
+
+ /* now store the physical address in the
+ * descriptor so the device can access it
+ */
+ fbr->bus_high[k] = upper_32_bits(fbr_physaddr);
+ fbr->bus_low[k] = lower_32_bits(fbr_physaddr);
+ fbr_physaddr += fbr->buffsize;
+ }
+ }
+ }
+
+ /* Allocate an area of memory for FIFO of Packet Status ring entries */
+ psr_size = sizeof(struct pkt_stat_desc) * rx_ring->psr_entries;
+
+ rx_ring->ps_ring_virtaddr = dma_alloc_coherent(&adapter->pdev->dev,
+ psr_size,
+ &rx_ring->ps_ring_physaddr,
+ GFP_KERNEL);
+
+ if (!rx_ring->ps_ring_virtaddr) {
+ dev_err(&adapter->pdev->dev,
+ "Cannot alloc memory for Packet Status Ring\n");
+ return -ENOMEM;
+ }
+
+ /* Allocate an area of memory for writeback of status information */
+ rx_ring->rx_status_block = dma_alloc_coherent(&adapter->pdev->dev,
+ sizeof(struct rx_status_block),
+ &rx_ring->rx_status_bus,
+ GFP_KERNEL);
+ if (!rx_ring->rx_status_block) {
+ dev_err(&adapter->pdev->dev,
+ "Cannot alloc memory for Status Block\n");
+ return -ENOMEM;
+ }
+ rx_ring->num_rfd = NIC_DEFAULT_NUM_RFD;
+
+ /* The RFDs are going to be put on lists later on, so initialize the
+ * lists now.
+ */
+ INIT_LIST_HEAD(&rx_ring->recv_list);
+ return 0;
+}
+
+static void et131x_rx_dma_memory_free(struct et131x_adapter *adapter)
+{
+ u8 id;
+ u32 ii;
+ u32 bufsize;
+ u32 psr_size;
+ struct rfd *rfd;
+ struct rx_ring *rx_ring = &adapter->rx_ring;
+ struct fbr_lookup *fbr;
+
+ /* Free RFDs and associated packet descriptors */
+ WARN_ON(rx_ring->num_ready_recv != rx_ring->num_rfd);
+
+ while (!list_empty(&rx_ring->recv_list)) {
+ rfd = list_entry(rx_ring->recv_list.next,
+ struct rfd, list_node);
+
+ list_del(&rfd->list_node);
+ rfd->skb = NULL;
+ kfree(rfd);
+ }
+
+ /* Free Free Buffer Rings */
+ for (id = 0; id < NUM_FBRS; id++) {
+ fbr = rx_ring->fbr[id];
+
+ if (!fbr || !fbr->ring_virtaddr)
+ continue;
+
+ /* First the packet memory */
+ for (ii = 0; ii < fbr->num_entries / FBR_CHUNKS; ii++) {
+ if (fbr->mem_virtaddrs[ii]) {
+ bufsize = fbr->buffsize * FBR_CHUNKS;
+
+ dma_free_coherent(&adapter->pdev->dev,
+ bufsize,
+ fbr->mem_virtaddrs[ii],
+ fbr->mem_physaddrs[ii]);
+
+ fbr->mem_virtaddrs[ii] = NULL;
+ }
+ }
+
+ bufsize = sizeof(struct fbr_desc) * fbr->num_entries;
+
+ dma_free_coherent(&adapter->pdev->dev,
+ bufsize,
+ fbr->ring_virtaddr,
+ fbr->ring_physaddr);
+
+ fbr->ring_virtaddr = NULL;
+ }
+
+ /* Free Packet Status Ring */
+ if (rx_ring->ps_ring_virtaddr) {
+ psr_size = sizeof(struct pkt_stat_desc) * rx_ring->psr_entries;
+
+ dma_free_coherent(&adapter->pdev->dev, psr_size,
+ rx_ring->ps_ring_virtaddr,
+ rx_ring->ps_ring_physaddr);
+
+ rx_ring->ps_ring_virtaddr = NULL;
+ }
+
+ /* Free area of memory for the writeback of status information */
+ if (rx_ring->rx_status_block) {
+ dma_free_coherent(&adapter->pdev->dev,
+ sizeof(struct rx_status_block),
+ rx_ring->rx_status_block,
+ rx_ring->rx_status_bus);
+ rx_ring->rx_status_block = NULL;
+ }
+
+ /* Free the FBR Lookup Table */
+ kfree(rx_ring->fbr[0]);
+ kfree(rx_ring->fbr[1]);
+
+ /* Reset Counters */
+ rx_ring->num_ready_recv = 0;
+}
+
+/* et131x_init_recv - Initialize receive data structures */
+static int et131x_init_recv(struct et131x_adapter *adapter)
+{
+ struct rfd *rfd;
+ u32 rfdct;
+ struct rx_ring *rx_ring = &adapter->rx_ring;
+
+ /* Setup each RFD */
+ for (rfdct = 0; rfdct < rx_ring->num_rfd; rfdct++) {
+ rfd = kzalloc(sizeof(*rfd), GFP_ATOMIC | GFP_DMA);
+ if (!rfd)
+ return -ENOMEM;
+
+ rfd->skb = NULL;
+
+ /* Add this RFD to the recv_list */
+ list_add_tail(&rfd->list_node, &rx_ring->recv_list);
+
+ /* Increment the available RFD's */
+ rx_ring->num_ready_recv++;
+ }
+
+ return 0;
+}
+
+/* et131x_set_rx_dma_timer - Set the heartbeat timer according to line rate */
+static void et131x_set_rx_dma_timer(struct et131x_adapter *adapter)
+{
+ struct phy_device *phydev = adapter->phydev;
+
+ /* For version B silicon, we do not use the RxDMA timer for 10 and 100
+ * Mbits/s line rates. We do not enable and RxDMA interrupt coalescing.
+ */
+ if ((phydev->speed == SPEED_100) || (phydev->speed == SPEED_10)) {
+ writel(0, &adapter->regs->rxdma.max_pkt_time);
+ writel(1, &adapter->regs->rxdma.num_pkt_done);
+ }
+}
+
+/* nic_return_rfd - Recycle a RFD and put it back onto the receive list */
+static void nic_return_rfd(struct et131x_adapter *adapter, struct rfd *rfd)
+{
+ struct rx_ring *rx_local = &adapter->rx_ring;
+ struct rxdma_regs __iomem *rx_dma = &adapter->regs->rxdma;
+ u16 buff_index = rfd->bufferindex;
+ u8 ring_index = rfd->ringindex;
+ unsigned long flags;
+ struct fbr_lookup *fbr = rx_local->fbr[ring_index];
+
+ /* We don't use any of the OOB data besides status. Otherwise, we
+ * need to clean up OOB data
+ */
+ if (buff_index < fbr->num_entries) {
+ u32 free_buff_ring;
+ u32 __iomem *offset;
+ struct fbr_desc *next;
+
+ if (ring_index == 0)
+ offset = &rx_dma->fbr0_full_offset;
+ else
+ offset = &rx_dma->fbr1_full_offset;
+
+ next = (struct fbr_desc *)(fbr->ring_virtaddr) +
+ INDEX10(fbr->local_full);
+
+ /* Handle the Free Buffer Ring advancement here. Write
+ * the PA / Buffer Index for the returned buffer into
+ * the oldest (next to be freed)FBR entry
+ */
+ next->addr_hi = fbr->bus_high[buff_index];
+ next->addr_lo = fbr->bus_low[buff_index];
+ next->word2 = buff_index;
+
+ free_buff_ring = bump_free_buff_ring(&fbr->local_full,
+ fbr->num_entries - 1);
+ writel(free_buff_ring, offset);
+ } else {
+ dev_err(&adapter->pdev->dev,
+ "%s illegal Buffer Index returned\n", __func__);
+ }
+
+ /* The processing on this RFD is done, so put it back on the tail of
+ * our list
+ */
+ spin_lock_irqsave(&adapter->rcv_lock, flags);
+ list_add_tail(&rfd->list_node, &rx_local->recv_list);
+ rx_local->num_ready_recv++;
+ spin_unlock_irqrestore(&adapter->rcv_lock, flags);
+
+ WARN_ON(rx_local->num_ready_recv > rx_local->num_rfd);
+}
+
+/* nic_rx_pkts - Checks the hardware for available packets
+ *
+ * Checks the hardware for available packets, using completion ring
+ * If packets are available, it gets an RFD from the recv_list, attaches
+ * the packet to it, puts the RFD in the RecvPendList, and also returns
+ * the pointer to the RFD.
+ */
+static struct rfd *nic_rx_pkts(struct et131x_adapter *adapter)
+{
+ struct rx_ring *rx_local = &adapter->rx_ring;
+ struct rx_status_block *status;
+ struct pkt_stat_desc *psr;
+ struct rfd *rfd;
+ unsigned long flags;
+ struct list_head *element;
+ u8 ring_index;
+ u16 buff_index;
+ u32 len;
+ u32 word0;
+ u32 word1;
+ struct sk_buff *skb;
+ struct fbr_lookup *fbr;
+
+ /* RX Status block is written by the DMA engine prior to every
+ * interrupt. It contains the next to be used entry in the Packet
+ * Status Ring, and also the two Free Buffer rings.
+ */
+ status = rx_local->rx_status_block;
+ word1 = status->word1 >> 16;
+
+ /* Check the PSR and wrap bits do not match */
+ if ((word1 & 0x1FFF) == (rx_local->local_psr_full & 0x1FFF))
+ return NULL; /* Looks like this ring is not updated yet */
+
+ /* The packet status ring indicates that data is available. */
+ psr = (struct pkt_stat_desc *)(rx_local->ps_ring_virtaddr) +
+ (rx_local->local_psr_full & 0xFFF);
+
+ /* Grab any information that is required once the PSR is advanced,
+ * since we can no longer rely on the memory being accurate
+ */
+ len = psr->word1 & 0xFFFF;
+ ring_index = (psr->word1 >> 26) & 0x03;
+ fbr = rx_local->fbr[ring_index];
+ buff_index = (psr->word1 >> 16) & 0x3FF;
+ word0 = psr->word0;
+
+ /* Indicate that we have used this PSR entry. */
+ /* FIXME wrap 12 */
+ add_12bit(&rx_local->local_psr_full, 1);
+ if ((rx_local->local_psr_full & 0xFFF) > rx_local->psr_entries - 1) {
+ /* Clear psr full and toggle the wrap bit */
+ rx_local->local_psr_full &= ~0xFFF;
+ rx_local->local_psr_full ^= 0x1000;
+ }
+
+ writel(rx_local->local_psr_full, &adapter->regs->rxdma.psr_full_offset);
+
+ if (ring_index > 1 || buff_index > fbr->num_entries - 1) {
+ /* Illegal buffer or ring index cannot be used by S/W*/
+ dev_err(&adapter->pdev->dev,
+ "NICRxPkts PSR Entry %d indicates length of %d and/or bad bi(%d)\n",
+ rx_local->local_psr_full & 0xFFF, len, buff_index);
+ return NULL;
+ }
+
+ /* Get and fill the RFD. */
+ spin_lock_irqsave(&adapter->rcv_lock, flags);
+
+ element = rx_local->recv_list.next;
+ rfd = list_entry(element, struct rfd, list_node);
+
+ if (!rfd) {
+ spin_unlock_irqrestore(&adapter->rcv_lock, flags);
+ return NULL;
+ }
+
+ list_del(&rfd->list_node);
+ rx_local->num_ready_recv--;
+
+ spin_unlock_irqrestore(&adapter->rcv_lock, flags);
+
+ rfd->bufferindex = buff_index;
+ rfd->ringindex = ring_index;
+
+ /* In V1 silicon, there is a bug which screws up filtering of runt
+ * packets. Therefore runt packet filtering is disabled in the MAC and
+ * the packets are dropped here. They are also counted here.
+ */
+ if (len < (NIC_MIN_PACKET_SIZE + 4)) {
+ adapter->stats.rx_other_errs++;
+ rfd->len = 0;
+ goto out;
+ }
+
+ if ((word0 & ALCATEL_MULTICAST_PKT) && !(word0 & ALCATEL_BROADCAST_PKT))
+ adapter->stats.multicast_pkts_rcvd++;
+
+ rfd->len = len;
+
+ skb = dev_alloc_skb(rfd->len + 2);
+ if (!skb)
+ return NULL;
+
+ adapter->netdev->stats.rx_bytes += rfd->len;
+
+ memcpy(skb_put(skb, rfd->len), fbr->virt[buff_index], rfd->len);
+
+ skb->protocol = eth_type_trans(skb, adapter->netdev);
+ skb->ip_summed = CHECKSUM_NONE;
+ netif_receive_skb(skb);
+
+out:
+ nic_return_rfd(adapter, rfd);
+ return rfd;
+}
+
+static int et131x_handle_recv_pkts(struct et131x_adapter *adapter, int budget)
+{
+ struct rfd *rfd = NULL;
+ int count = 0;
+ int limit = budget;
+ bool done = true;
+ struct rx_ring *rx_ring = &adapter->rx_ring;
+
+ if (budget > MAX_PACKETS_HANDLED)
+ limit = MAX_PACKETS_HANDLED;
+
+ /* Process up to available RFD's */
+ while (count < limit) {
+ if (list_empty(&rx_ring->recv_list)) {
+ WARN_ON(rx_ring->num_ready_recv != 0);
+ done = false;
+ break;
+ }
+
+ rfd = nic_rx_pkts(adapter);
+
+ if (rfd == NULL)
+ break;
+
+ /* Do not receive any packets until a filter has been set.
+ * Do not receive any packets until we have link.
+ * If length is zero, return the RFD in order to advance the
+ * Free buffer ring.
+ */
+ if (!adapter->packet_filter ||
+ !netif_carrier_ok(adapter->netdev) ||
+ rfd->len == 0)
+ continue;
+
+ adapter->netdev->stats.rx_packets++;
+
+ if (rx_ring->num_ready_recv < RFD_LOW_WATER_MARK)
+ dev_warn(&adapter->pdev->dev, "RFD's are running out\n");
+
+ count++;
+ }
+
+ if (count == limit || !done) {
+ rx_ring->unfinished_receives = true;
+ writel(PARM_TX_TIME_INT_DEF * NANO_IN_A_MICRO,
+ &adapter->regs->global.watchdog_timer);
+ } else {
+ /* Watchdog timer will disable itself if appropriate. */
+ rx_ring->unfinished_receives = false;
+ }
+
+ return count;
+}
+
+/* et131x_tx_dma_memory_alloc
+ *
+ * Allocates memory that will be visible both to the device and to the CPU.
+ * The OS will pass us packets, pointers to which we will insert in the Tx
+ * Descriptor queue. The device will read this queue to find the packets in
+ * memory. The device will update the "status" in memory each time it xmits a
+ * packet.
+ */
+static int et131x_tx_dma_memory_alloc(struct et131x_adapter *adapter)
+{
+ int desc_size = 0;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ /* Allocate memory for the TCB's (Transmit Control Block) */
+ tx_ring->tcb_ring = kcalloc(NUM_TCB, sizeof(struct tcb),
+ GFP_ATOMIC | GFP_DMA);
+ if (!tx_ring->tcb_ring)
+ return -ENOMEM;
+
+ desc_size = (sizeof(struct tx_desc) * NUM_DESC_PER_RING_TX);
+ tx_ring->tx_desc_ring = dma_alloc_coherent(&adapter->pdev->dev,
+ desc_size,
+ &tx_ring->tx_desc_ring_pa,
+ GFP_KERNEL);
+ if (!tx_ring->tx_desc_ring) {
+ dev_err(&adapter->pdev->dev,
+ "Cannot alloc memory for Tx Ring\n");
+ return -ENOMEM;
+ }
+
+ tx_ring->tx_status = dma_alloc_coherent(&adapter->pdev->dev,
+ sizeof(u32),
+ &tx_ring->tx_status_pa,
+ GFP_KERNEL);
+ if (!tx_ring->tx_status_pa) {
+ dev_err(&adapter->pdev->dev,
+ "Cannot alloc memory for Tx status block\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+static void et131x_tx_dma_memory_free(struct et131x_adapter *adapter)
+{
+ int desc_size = 0;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ if (tx_ring->tx_desc_ring) {
+ /* Free memory relating to Tx rings here */
+ desc_size = (sizeof(struct tx_desc) * NUM_DESC_PER_RING_TX);
+ dma_free_coherent(&adapter->pdev->dev,
+ desc_size,
+ tx_ring->tx_desc_ring,
+ tx_ring->tx_desc_ring_pa);
+ tx_ring->tx_desc_ring = NULL;
+ }
+
+ /* Free memory for the Tx status block */
+ if (tx_ring->tx_status) {
+ dma_free_coherent(&adapter->pdev->dev,
+ sizeof(u32),
+ tx_ring->tx_status,
+ tx_ring->tx_status_pa);
+
+ tx_ring->tx_status = NULL;
+ }
+ /* Free the memory for the tcb structures */
+ kfree(tx_ring->tcb_ring);
+}
+
+/* nic_send_packet - NIC specific send handler for version B silicon. */
+static int nic_send_packet(struct et131x_adapter *adapter, struct tcb *tcb)
+{
+ u32 i;
+ struct tx_desc desc[24];
+ u32 frag = 0;
+ u32 thiscopy, remainder;
+ struct sk_buff *skb = tcb->skb;
+ u32 nr_frags = skb_shinfo(skb)->nr_frags + 1;
+ struct skb_frag_struct *frags = &skb_shinfo(skb)->frags[0];
+ struct phy_device *phydev = adapter->phydev;
+ dma_addr_t dma_addr;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ /* Part of the optimizations of this send routine restrict us to
+ * sending 24 fragments at a pass. In practice we should never see
+ * more than 5 fragments.
+ */
+
+ /* nr_frags should be no more than 18. */
+ BUILD_BUG_ON(MAX_SKB_FRAGS + 1 > 23);
+
+ memset(desc, 0, sizeof(struct tx_desc) * (nr_frags + 1));
+
+ for (i = 0; i < nr_frags; i++) {
+ /* If there is something in this element, lets get a
+ * descriptor from the ring and get the necessary data
+ */
+ if (i == 0) {
+ /* If the fragments are smaller than a standard MTU,
+ * then map them to a single descriptor in the Tx
+ * Desc ring. However, if they're larger, as is
+ * possible with support for jumbo packets, then
+ * split them each across 2 descriptors.
+ *
+ * This will work until we determine why the hardware
+ * doesn't seem to like large fragments.
+ */
+ if (skb_headlen(skb) <= 1514) {
+ /* Low 16bits are length, high is vlan and
+ * unused currently so zero
+ */
+ desc[frag].len_vlan = skb_headlen(skb);
+ dma_addr = dma_map_single(&adapter->pdev->dev,
+ skb->data,
+ skb_headlen(skb),
+ DMA_TO_DEVICE);
+ desc[frag].addr_lo = lower_32_bits(dma_addr);
+ desc[frag].addr_hi = upper_32_bits(dma_addr);
+ frag++;
+ } else {
+ desc[frag].len_vlan = skb_headlen(skb) / 2;
+ dma_addr = dma_map_single(&adapter->pdev->dev,
+ skb->data,
+ skb_headlen(skb) / 2,
+ DMA_TO_DEVICE);
+ desc[frag].addr_lo = lower_32_bits(dma_addr);
+ desc[frag].addr_hi = upper_32_bits(dma_addr);
+ frag++;
+
+ desc[frag].len_vlan = skb_headlen(skb) / 2;
+ dma_addr = dma_map_single(&adapter->pdev->dev,
+ skb->data +
+ skb_headlen(skb) / 2,
+ skb_headlen(skb) / 2,
+ DMA_TO_DEVICE);
+ desc[frag].addr_lo = lower_32_bits(dma_addr);
+ desc[frag].addr_hi = upper_32_bits(dma_addr);
+ frag++;
+ }
+ } else {
+ desc[frag].len_vlan = frags[i - 1].size;
+ dma_addr = skb_frag_dma_map(&adapter->pdev->dev,
+ &frags[i - 1],
+ 0,
+ frags[i - 1].size,
+ DMA_TO_DEVICE);
+ desc[frag].addr_lo = lower_32_bits(dma_addr);
+ desc[frag].addr_hi = upper_32_bits(dma_addr);
+ frag++;
+ }
+ }
+
+ if (phydev && phydev->speed == SPEED_1000) {
+ if (++tx_ring->since_irq == PARM_TX_NUM_BUFS_DEF) {
+ /* Last element & Interrupt flag */
+ desc[frag - 1].flags =
+ TXDESC_FLAG_INTPROC | TXDESC_FLAG_LASTPKT;
+ tx_ring->since_irq = 0;
+ } else { /* Last element */
+ desc[frag - 1].flags = TXDESC_FLAG_LASTPKT;
+ }
+ } else {
+ desc[frag - 1].flags =
+ TXDESC_FLAG_INTPROC | TXDESC_FLAG_LASTPKT;
+ }
+
+ desc[0].flags |= TXDESC_FLAG_FIRSTPKT;
+
+ tcb->index_start = tx_ring->send_idx;
+ tcb->stale = 0;
+
+ thiscopy = NUM_DESC_PER_RING_TX - INDEX10(tx_ring->send_idx);
+
+ if (thiscopy >= frag) {
+ remainder = 0;
+ thiscopy = frag;
+ } else {
+ remainder = frag - thiscopy;
+ }
+
+ memcpy(tx_ring->tx_desc_ring + INDEX10(tx_ring->send_idx),
+ desc,
+ sizeof(struct tx_desc) * thiscopy);
+
+ add_10bit(&tx_ring->send_idx, thiscopy);
+
+ if (INDEX10(tx_ring->send_idx) == 0 ||
+ INDEX10(tx_ring->send_idx) == NUM_DESC_PER_RING_TX) {
+ tx_ring->send_idx &= ~ET_DMA10_MASK;
+ tx_ring->send_idx ^= ET_DMA10_WRAP;
+ }
+
+ if (remainder) {
+ memcpy(tx_ring->tx_desc_ring,
+ desc + thiscopy,
+ sizeof(struct tx_desc) * remainder);
+
+ add_10bit(&tx_ring->send_idx, remainder);
+ }
+
+ if (INDEX10(tx_ring->send_idx) == 0) {
+ if (tx_ring->send_idx)
+ tcb->index = NUM_DESC_PER_RING_TX - 1;
+ else
+ tcb->index = ET_DMA10_WRAP|(NUM_DESC_PER_RING_TX - 1);
+ } else {
+ tcb->index = tx_ring->send_idx - 1;
+ }
+
+ spin_lock(&adapter->tcb_send_qlock);
+
+ if (tx_ring->send_tail)
+ tx_ring->send_tail->next = tcb;
+ else
+ tx_ring->send_head = tcb;
+
+ tx_ring->send_tail = tcb;
+
+ WARN_ON(tcb->next != NULL);
+
+ tx_ring->used++;
+
+ spin_unlock(&adapter->tcb_send_qlock);
+
+ /* Write the new write pointer back to the device. */
+ writel(tx_ring->send_idx, &adapter->regs->txdma.service_request);
+
+ /* For Gig only, we use Tx Interrupt coalescing. Enable the software
+ * timer to wake us up if this packet isn't followed by N more.
+ */
+ if (phydev && phydev->speed == SPEED_1000) {
+ writel(PARM_TX_TIME_INT_DEF * NANO_IN_A_MICRO,
+ &adapter->regs->global.watchdog_timer);
+ }
+ return 0;
+}
+
+static int send_packet(struct sk_buff *skb, struct et131x_adapter *adapter)
+{
+ int status;
+ struct tcb *tcb;
+ unsigned long flags;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ /* All packets must have at least a MAC address and a protocol type */
+ if (skb->len < ETH_HLEN)
+ return -EIO;
+
+ spin_lock_irqsave(&adapter->tcb_ready_qlock, flags);
+
+ tcb = tx_ring->tcb_qhead;
+
+ if (tcb == NULL) {
+ spin_unlock_irqrestore(&adapter->tcb_ready_qlock, flags);
+ return -ENOMEM;
+ }
+
+ tx_ring->tcb_qhead = tcb->next;
+
+ if (tx_ring->tcb_qhead == NULL)
+ tx_ring->tcb_qtail = NULL;
+
+ spin_unlock_irqrestore(&adapter->tcb_ready_qlock, flags);
+
+ tcb->skb = skb;
+ tcb->next = NULL;
+
+ status = nic_send_packet(adapter, tcb);
+
+ if (status != 0) {
+ spin_lock_irqsave(&adapter->tcb_ready_qlock, flags);
+
+ if (tx_ring->tcb_qtail)
+ tx_ring->tcb_qtail->next = tcb;
+ else
+ /* Apparently ready Q is empty. */
+ tx_ring->tcb_qhead = tcb;
+
+ tx_ring->tcb_qtail = tcb;
+ spin_unlock_irqrestore(&adapter->tcb_ready_qlock, flags);
+ return status;
+ }
+ WARN_ON(tx_ring->used > NUM_TCB);
+ return 0;
+}
+
+/* free_send_packet - Recycle a struct tcb */
+static inline void free_send_packet(struct et131x_adapter *adapter,
+ struct tcb *tcb)
+{
+ unsigned long flags;
+ struct tx_desc *desc = NULL;
+ struct net_device_stats *stats = &adapter->netdev->stats;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+ u64 dma_addr;
+
+ if (tcb->skb) {
+ stats->tx_bytes += tcb->skb->len;
+
+ /* Iterate through the TX descriptors on the ring
+ * corresponding to this packet and umap the fragments
+ * they point to
+ */
+ do {
+ desc = tx_ring->tx_desc_ring +
+ INDEX10(tcb->index_start);
+
+ dma_addr = desc->addr_lo;
+ dma_addr |= (u64)desc->addr_hi << 32;
+
+ dma_unmap_single(&adapter->pdev->dev,
+ dma_addr,
+ desc->len_vlan, DMA_TO_DEVICE);
+
+ add_10bit(&tcb->index_start, 1);
+ if (INDEX10(tcb->index_start) >=
+ NUM_DESC_PER_RING_TX) {
+ tcb->index_start &= ~ET_DMA10_MASK;
+ tcb->index_start ^= ET_DMA10_WRAP;
+ }
+ } while (desc != tx_ring->tx_desc_ring + INDEX10(tcb->index));
+
+ dev_kfree_skb_any(tcb->skb);
+ }
+
+ memset(tcb, 0, sizeof(struct tcb));
+
+ /* Add the TCB to the Ready Q */
+ spin_lock_irqsave(&adapter->tcb_ready_qlock, flags);
+
+ stats->tx_packets++;
+
+ if (tx_ring->tcb_qtail)
+ tx_ring->tcb_qtail->next = tcb;
+ else /* Apparently ready Q is empty. */
+ tx_ring->tcb_qhead = tcb;
+
+ tx_ring->tcb_qtail = tcb;
+
+ spin_unlock_irqrestore(&adapter->tcb_ready_qlock, flags);
+ WARN_ON(tx_ring->used < 0);
+}
+
+/* et131x_free_busy_send_packets - Free and complete the stopped active sends */
+static void et131x_free_busy_send_packets(struct et131x_adapter *adapter)
+{
+ struct tcb *tcb;
+ unsigned long flags;
+ u32 freed = 0;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ /* Any packets being sent? Check the first TCB on the send list */
+ spin_lock_irqsave(&adapter->tcb_send_qlock, flags);
+
+ tcb = tx_ring->send_head;
+
+ while (tcb != NULL && freed < NUM_TCB) {
+ struct tcb *next = tcb->next;
+
+ tx_ring->send_head = next;
+
+ if (next == NULL)
+ tx_ring->send_tail = NULL;
+
+ tx_ring->used--;
+
+ spin_unlock_irqrestore(&adapter->tcb_send_qlock, flags);
+
+ freed++;
+ free_send_packet(adapter, tcb);
+
+ spin_lock_irqsave(&adapter->tcb_send_qlock, flags);
+
+ tcb = tx_ring->send_head;
+ }
+
+ WARN_ON(freed == NUM_TCB);
+
+ spin_unlock_irqrestore(&adapter->tcb_send_qlock, flags);
+
+ tx_ring->used = 0;
+}
+
+/* et131x_handle_send_pkts
+ *
+ * Re-claim the send resources, complete sends and get more to send from
+ * the send wait queue.
+ */
+static void et131x_handle_send_pkts(struct et131x_adapter *adapter)
+{
+ unsigned long flags;
+ u32 serviced;
+ struct tcb *tcb;
+ u32 index;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ serviced = readl(&adapter->regs->txdma.new_service_complete);
+ index = INDEX10(serviced);
+
+ /* Has the ring wrapped? Process any descriptors that do not have
+ * the same "wrap" indicator as the current completion indicator
+ */
+ spin_lock_irqsave(&adapter->tcb_send_qlock, flags);
+
+ tcb = tx_ring->send_head;
+
+ while (tcb &&
+ ((serviced ^ tcb->index) & ET_DMA10_WRAP) &&
+ index < INDEX10(tcb->index)) {
+ tx_ring->used--;
+ tx_ring->send_head = tcb->next;
+ if (tcb->next == NULL)
+ tx_ring->send_tail = NULL;
+
+ spin_unlock_irqrestore(&adapter->tcb_send_qlock, flags);
+ free_send_packet(adapter, tcb);
+ spin_lock_irqsave(&adapter->tcb_send_qlock, flags);
+
+ /* Goto the next packet */
+ tcb = tx_ring->send_head;
+ }
+ while (tcb &&
+ !((serviced ^ tcb->index) & ET_DMA10_WRAP) &&
+ index > (tcb->index & ET_DMA10_MASK)) {
+ tx_ring->used--;
+ tx_ring->send_head = tcb->next;
+ if (tcb->next == NULL)
+ tx_ring->send_tail = NULL;
+
+ spin_unlock_irqrestore(&adapter->tcb_send_qlock, flags);
+ free_send_packet(adapter, tcb);
+ spin_lock_irqsave(&adapter->tcb_send_qlock, flags);
+
+ /* Goto the next packet */
+ tcb = tx_ring->send_head;
+ }
+
+ /* Wake up the queue when we hit a low-water mark */
+ if (tx_ring->used <= NUM_TCB / 3)
+ netif_wake_queue(adapter->netdev);
+
+ spin_unlock_irqrestore(&adapter->tcb_send_qlock, flags);
+}
+
+static int et131x_get_settings(struct net_device *netdev,
+ struct ethtool_cmd *cmd)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ return phy_ethtool_gset(adapter->phydev, cmd);
+}
+
+static int et131x_set_settings(struct net_device *netdev,
+ struct ethtool_cmd *cmd)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ return phy_ethtool_sset(adapter->phydev, cmd);
+}
+
+static int et131x_get_regs_len(struct net_device *netdev)
+{
+#define ET131X_REGS_LEN 256
+ return ET131X_REGS_LEN * sizeof(u32);
+}
+
+static void et131x_get_regs(struct net_device *netdev,
+ struct ethtool_regs *regs, void *regs_data)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct address_map __iomem *aregs = adapter->regs;
+ u32 *regs_buff = regs_data;
+ u32 num = 0;
+ u16 tmp;
+
+ memset(regs_data, 0, et131x_get_regs_len(netdev));
+
+ regs->version = (1 << 24) | (adapter->pdev->revision << 16) |
+ adapter->pdev->device;
+
+ /* PHY regs */
+ et131x_mii_read(adapter, MII_BMCR, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_BMSR, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_PHYSID1, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_PHYSID2, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_ADVERTISE, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_LPA, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_EXPANSION, &tmp);
+ regs_buff[num++] = tmp;
+ /* Autoneg next page transmit reg */
+ et131x_mii_read(adapter, 0x07, &tmp);
+ regs_buff[num++] = tmp;
+ /* Link partner next page reg */
+ et131x_mii_read(adapter, 0x08, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_CTRL1000, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_STAT1000, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, 0x0b, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, 0x0c, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_MMD_CTRL, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_MMD_DATA, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, MII_ESTATUS, &tmp);
+ regs_buff[num++] = tmp;
+
+ et131x_mii_read(adapter, PHY_INDEX_REG, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_DATA_REG, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_MPHY_CONTROL_REG, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_LOOPBACK_CONTROL, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_LOOPBACK_CONTROL + 1, &tmp);
+ regs_buff[num++] = tmp;
+
+ et131x_mii_read(adapter, PHY_REGISTER_MGMT_CONTROL, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_CONFIG, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_PHY_CONTROL, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_INTERRUPT_MASK, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_INTERRUPT_STATUS, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_PHY_STATUS, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_LED_1, &tmp);
+ regs_buff[num++] = tmp;
+ et131x_mii_read(adapter, PHY_LED_2, &tmp);
+ regs_buff[num++] = tmp;
+
+ /* Global regs */
+ regs_buff[num++] = readl(&aregs->global.txq_start_addr);
+ regs_buff[num++] = readl(&aregs->global.txq_end_addr);
+ regs_buff[num++] = readl(&aregs->global.rxq_start_addr);
+ regs_buff[num++] = readl(&aregs->global.rxq_end_addr);
+ regs_buff[num++] = readl(&aregs->global.pm_csr);
+ regs_buff[num++] = adapter->stats.interrupt_status;
+ regs_buff[num++] = readl(&aregs->global.int_mask);
+ regs_buff[num++] = readl(&aregs->global.int_alias_clr_en);
+ regs_buff[num++] = readl(&aregs->global.int_status_alias);
+ regs_buff[num++] = readl(&aregs->global.sw_reset);
+ regs_buff[num++] = readl(&aregs->global.slv_timer);
+ regs_buff[num++] = readl(&aregs->global.msi_config);
+ regs_buff[num++] = readl(&aregs->global.loopback);
+ regs_buff[num++] = readl(&aregs->global.watchdog_timer);
+
+ /* TXDMA regs */
+ regs_buff[num++] = readl(&aregs->txdma.csr);
+ regs_buff[num++] = readl(&aregs->txdma.pr_base_hi);
+ regs_buff[num++] = readl(&aregs->txdma.pr_base_lo);
+ regs_buff[num++] = readl(&aregs->txdma.pr_num_des);
+ regs_buff[num++] = readl(&aregs->txdma.txq_wr_addr);
+ regs_buff[num++] = readl(&aregs->txdma.txq_wr_addr_ext);
+ regs_buff[num++] = readl(&aregs->txdma.txq_rd_addr);
+ regs_buff[num++] = readl(&aregs->txdma.dma_wb_base_hi);
+ regs_buff[num++] = readl(&aregs->txdma.dma_wb_base_lo);
+ regs_buff[num++] = readl(&aregs->txdma.service_request);
+ regs_buff[num++] = readl(&aregs->txdma.service_complete);
+ regs_buff[num++] = readl(&aregs->txdma.cache_rd_index);
+ regs_buff[num++] = readl(&aregs->txdma.cache_wr_index);
+ regs_buff[num++] = readl(&aregs->txdma.tx_dma_error);
+ regs_buff[num++] = readl(&aregs->txdma.desc_abort_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.payload_abort_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.writeback_abort_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.desc_timeout_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.payload_timeout_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.writeback_timeout_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.desc_error_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.payload_error_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.writeback_error_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.dropped_tlp_cnt);
+ regs_buff[num++] = readl(&aregs->txdma.new_service_complete);
+ regs_buff[num++] = readl(&aregs->txdma.ethernet_packet_cnt);
+
+ /* RXDMA regs */
+ regs_buff[num++] = readl(&aregs->rxdma.csr);
+ regs_buff[num++] = readl(&aregs->rxdma.dma_wb_base_hi);
+ regs_buff[num++] = readl(&aregs->rxdma.dma_wb_base_lo);
+ regs_buff[num++] = readl(&aregs->rxdma.num_pkt_done);
+ regs_buff[num++] = readl(&aregs->rxdma.max_pkt_time);
+ regs_buff[num++] = readl(&aregs->rxdma.rxq_rd_addr);
+ regs_buff[num++] = readl(&aregs->rxdma.rxq_rd_addr_ext);
+ regs_buff[num++] = readl(&aregs->rxdma.rxq_wr_addr);
+ regs_buff[num++] = readl(&aregs->rxdma.psr_base_hi);
+ regs_buff[num++] = readl(&aregs->rxdma.psr_base_lo);
+ regs_buff[num++] = readl(&aregs->rxdma.psr_num_des);
+ regs_buff[num++] = readl(&aregs->rxdma.psr_avail_offset);
+ regs_buff[num++] = readl(&aregs->rxdma.psr_full_offset);
+ regs_buff[num++] = readl(&aregs->rxdma.psr_access_index);
+ regs_buff[num++] = readl(&aregs->rxdma.psr_min_des);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr0_base_lo);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr0_base_hi);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr0_num_des);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr0_avail_offset);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr0_full_offset);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr0_rd_index);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr0_min_des);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr1_base_lo);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr1_base_hi);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr1_num_des);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr1_avail_offset);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr1_full_offset);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr1_rd_index);
+ regs_buff[num++] = readl(&aregs->rxdma.fbr1_min_des);
+}
+
+static void et131x_get_drvinfo(struct net_device *netdev,
+ struct ethtool_drvinfo *info)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ strlcpy(info->driver, DRIVER_NAME, sizeof(info->driver));
+ strlcpy(info->version, DRIVER_VERSION, sizeof(info->version));
+ strlcpy(info->bus_info, pci_name(adapter->pdev),
+ sizeof(info->bus_info));
+}
+
+static struct ethtool_ops et131x_ethtool_ops = {
+ .get_settings = et131x_get_settings,
+ .set_settings = et131x_set_settings,
+ .get_drvinfo = et131x_get_drvinfo,
+ .get_regs_len = et131x_get_regs_len,
+ .get_regs = et131x_get_regs,
+ .get_link = ethtool_op_get_link,
+};
+
+/* et131x_hwaddr_init - set up the MAC Address */
+static void et131x_hwaddr_init(struct et131x_adapter *adapter)
+{
+ /* If have our default mac from init and no mac address from
+ * EEPROM then we need to generate the last octet and set it on the
+ * device
+ */
+ if (is_zero_ether_addr(adapter->rom_addr)) {
+ /* We need to randomly generate the last octet so we
+ * decrease our chances of setting the mac address to
+ * same as another one of our cards in the system
+ */
+ get_random_bytes(&adapter->addr[5], 1);
+ /* We have the default value in the register we are
+ * working with so we need to copy the current
+ * address into the permanent address
+ */
+ ether_addr_copy(adapter->rom_addr, adapter->addr);
+ } else {
+ /* We do not have an override address, so set the
+ * current address to the permanent address and add
+ * it to the device
+ */
+ ether_addr_copy(adapter->addr, adapter->rom_addr);
+ }
+}
+
+static int et131x_pci_init(struct et131x_adapter *adapter,
+ struct pci_dev *pdev)
+{
+ u16 max_payload;
+ int i, rc;
+
+ rc = et131x_init_eeprom(adapter);
+ if (rc < 0)
+ goto out;
+
+ if (!pci_is_pcie(pdev)) {
+ dev_err(&pdev->dev, "Missing PCIe capabilities\n");
+ goto err_out;
+ }
+
+ /* Program the Ack/Nak latency and replay timers */
+ max_payload = pdev->pcie_mpss;
+
+ if (max_payload < 2) {
+ static const u16 acknak[2] = { 0x76, 0xD0 };
+ static const u16 replay[2] = { 0x1E0, 0x2ED };
+
+ if (pci_write_config_word(pdev, ET1310_PCI_ACK_NACK,
+ acknak[max_payload])) {
+ dev_err(&pdev->dev,
+ "Could not write PCI config space for ACK/NAK\n");
+ goto err_out;
+ }
+ if (pci_write_config_word(pdev, ET1310_PCI_REPLAY,
+ replay[max_payload])) {
+ dev_err(&pdev->dev,
+ "Could not write PCI config space for Replay Timer\n");
+ goto err_out;
+ }
+ }
+
+ /* l0s and l1 latency timers. We are using default values.
+ * Representing 001 for L0s and 010 for L1
+ */
+ if (pci_write_config_byte(pdev, ET1310_PCI_L0L1LATENCY, 0x11)) {
+ dev_err(&pdev->dev,
+ "Could not write PCI config space for Latency Timers\n");
+ goto err_out;
+ }
+
+ /* Change the max read size to 2k */
+ if (pcie_set_readrq(pdev, 2048)) {
+ dev_err(&pdev->dev,
+ "Couldn't change PCI config space for Max read size\n");
+ goto err_out;
+ }
+
+ /* Get MAC address from config space if an eeprom exists, otherwise
+ * the MAC address there will not be valid
+ */
+ if (!adapter->has_eeprom) {
+ et131x_hwaddr_init(adapter);
+ return 0;
+ }
+
+ for (i = 0; i < ETH_ALEN; i++) {
+ if (pci_read_config_byte(pdev, ET1310_PCI_MAC_ADDRESS + i,
+ adapter->rom_addr + i)) {
+ dev_err(&pdev->dev, "Could not read PCI config space for MAC address\n");
+ goto err_out;
+ }
+ }
+ ether_addr_copy(adapter->addr, adapter->rom_addr);
+out:
+ return rc;
+err_out:
+ rc = -EIO;
+ goto out;
+}
+
+/* et131x_error_timer_handler
+ * @data: timer-specific variable; here a pointer to our adapter structure
+ *
+ * The routine called when the error timer expires, to track the number of
+ * recurring errors.
+ */
+static void et131x_error_timer_handler(unsigned long data)
+{
+ struct et131x_adapter *adapter = (struct et131x_adapter *)data;
+ struct phy_device *phydev = adapter->phydev;
+
+ if (et1310_in_phy_coma(adapter)) {
+ /* Bring the device immediately out of coma, to
+ * prevent it from sleeping indefinitely, this
+ * mechanism could be improved!
+ */
+ et1310_disable_phy_coma(adapter);
+ adapter->boot_coma = 20;
+ } else {
+ et1310_update_macstat_host_counters(adapter);
+ }
+
+ if (!phydev->link && adapter->boot_coma < 11)
+ adapter->boot_coma++;
+
+ if (adapter->boot_coma == 10) {
+ if (!phydev->link) {
+ if (!et1310_in_phy_coma(adapter)) {
+ /* NOTE - This was originally a 'sync with
+ * interrupt'. How to do that under Linux?
+ */
+ et131x_enable_interrupts(adapter);
+ et1310_enable_phy_coma(adapter);
+ }
+ }
+ }
+
+ /* This is a periodic timer, so reschedule */
+ mod_timer(&adapter->error_timer, jiffies +
+ msecs_to_jiffies(TX_ERROR_PERIOD));
+}
+
+static void et131x_adapter_memory_free(struct et131x_adapter *adapter)
+{
+ et131x_tx_dma_memory_free(adapter);
+ et131x_rx_dma_memory_free(adapter);
+}
+
+static int et131x_adapter_memory_alloc(struct et131x_adapter *adapter)
+{
+ int status;
+
+ status = et131x_tx_dma_memory_alloc(adapter);
+ if (status) {
+ dev_err(&adapter->pdev->dev,
+ "et131x_tx_dma_memory_alloc FAILED\n");
+ et131x_tx_dma_memory_free(adapter);
+ return status;
+ }
+
+ status = et131x_rx_dma_memory_alloc(adapter);
+ if (status) {
+ dev_err(&adapter->pdev->dev,
+ "et131x_rx_dma_memory_alloc FAILED\n");
+ et131x_adapter_memory_free(adapter);
+ return status;
+ }
+
+ status = et131x_init_recv(adapter);
+ if (status) {
+ dev_err(&adapter->pdev->dev, "et131x_init_recv FAILED\n");
+ et131x_adapter_memory_free(adapter);
+ }
+ return status;
+}
+
+static void et131x_adjust_link(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct phy_device *phydev = adapter->phydev;
+
+ if (!phydev)
+ return;
+ if (phydev->link == adapter->link)
+ return;
+
+ /* Check to see if we are in coma mode and if
+ * so, disable it because we will not be able
+ * to read PHY values until we are out.
+ */
+ if (et1310_in_phy_coma(adapter))
+ et1310_disable_phy_coma(adapter);
+
+ adapter->link = phydev->link;
+ phy_print_status(phydev);
+
+ if (phydev->link) {
+ adapter->boot_coma = 20;
+ if (phydev->speed == SPEED_10) {
+ u16 register18;
+
+ et131x_mii_read(adapter, PHY_MPHY_CONTROL_REG,
+ ®ister18);
+ et131x_mii_write(adapter, phydev->addr,
+ PHY_MPHY_CONTROL_REG,
+ register18 | 0x4);
+ et131x_mii_write(adapter, phydev->addr, PHY_INDEX_REG,
+ register18 | 0x8402);
+ et131x_mii_write(adapter, phydev->addr, PHY_DATA_REG,
+ register18 | 511);
+ et131x_mii_write(adapter, phydev->addr,
+ PHY_MPHY_CONTROL_REG, register18);
+ }
+
+ et1310_config_flow_control(adapter);
+
+ if (phydev->speed == SPEED_1000 &&
+ adapter->registry_jumbo_packet > 2048) {
+ u16 reg;
+
+ et131x_mii_read(adapter, PHY_CONFIG, ®);
+ reg &= ~ET_PHY_CONFIG_TX_FIFO_DEPTH;
+ reg |= ET_PHY_CONFIG_FIFO_DEPTH_32;
+ et131x_mii_write(adapter, phydev->addr, PHY_CONFIG,
+ reg);
+ }
+
+ et131x_set_rx_dma_timer(adapter);
+ et1310_config_mac_regs2(adapter);
+ } else {
+ adapter->boot_coma = 0;
+
+ if (phydev->speed == SPEED_10) {
+ u16 register18;
+
+ et131x_mii_read(adapter, PHY_MPHY_CONTROL_REG,
+ ®ister18);
+ et131x_mii_write(adapter, phydev->addr,
+ PHY_MPHY_CONTROL_REG,
+ register18 | 0x4);
+ et131x_mii_write(adapter, phydev->addr,
+ PHY_INDEX_REG, register18 | 0x8402);
+ et131x_mii_write(adapter, phydev->addr,
+ PHY_DATA_REG, register18 | 511);
+ et131x_mii_write(adapter, phydev->addr,
+ PHY_MPHY_CONTROL_REG, register18);
+ }
+
+ et131x_free_busy_send_packets(adapter);
+ et131x_init_send(adapter);
+
+ /* Bring the device back to the state it was during
+ * init prior to autonegotiation being complete. This
+ * way, when we get the auto-neg complete interrupt,
+ * we can complete init by calling config_mac_regs2.
+ */
+ et131x_soft_reset(adapter);
+
+ et131x_adapter_setup(adapter);
+
+ et131x_disable_txrx(netdev);
+ et131x_enable_txrx(netdev);
+ }
+}
+
+static int et131x_mii_probe(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct phy_device *phydev = NULL;
+
+ phydev = phy_find_first(adapter->mii_bus);
+ if (!phydev) {
+ dev_err(&adapter->pdev->dev, "no PHY found\n");
+ return -ENODEV;
+ }
+
+ phydev = phy_connect(netdev, dev_name(&phydev->dev),
+ &et131x_adjust_link, PHY_INTERFACE_MODE_MII);
+
+ if (IS_ERR(phydev)) {
+ dev_err(&adapter->pdev->dev, "Could not attach to PHY\n");
+ return PTR_ERR(phydev);
+ }
+
+ phydev->supported &= (SUPPORTED_10baseT_Half |
+ SUPPORTED_10baseT_Full |
+ SUPPORTED_100baseT_Half |
+ SUPPORTED_100baseT_Full |
+ SUPPORTED_Autoneg |
+ SUPPORTED_MII |
+ SUPPORTED_TP);
+
+ if (adapter->pdev->device != ET131X_PCI_DEVICE_ID_FAST)
+ phydev->supported |= SUPPORTED_1000baseT_Half |
+ SUPPORTED_1000baseT_Full;
+
+ phydev->advertising = phydev->supported;
+ phydev->autoneg = AUTONEG_ENABLE;
+ adapter->phydev = phydev;
+
+ dev_info(&adapter->pdev->dev,
+ "attached PHY driver [%s] (mii_bus:phy_addr=%s)\n",
+ phydev->drv->name, dev_name(&phydev->dev));
+
+ return 0;
+}
+
+static struct et131x_adapter *et131x_adapter_init(struct net_device *netdev,
+ struct pci_dev *pdev)
+{
+ static const u8 default_mac[] = { 0x00, 0x05, 0x3d, 0x00, 0x02, 0x00 };
+
+ struct et131x_adapter *adapter;
+
+ adapter = netdev_priv(netdev);
+ adapter->pdev = pci_dev_get(pdev);
+ adapter->netdev = netdev;
+
+ spin_lock_init(&adapter->tcb_send_qlock);
+ spin_lock_init(&adapter->tcb_ready_qlock);
+ spin_lock_init(&adapter->rcv_lock);
+
+ adapter->registry_jumbo_packet = 1514; /* 1514-9216 */
+
+ ether_addr_copy(adapter->addr, default_mac);
+
+ return adapter;
+}
+
+static void et131x_pci_remove(struct pci_dev *pdev)
+{
+ struct net_device *netdev = pci_get_drvdata(pdev);
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ unregister_netdev(netdev);
+ netif_napi_del(&adapter->napi);
+ phy_disconnect(adapter->phydev);
+ mdiobus_unregister(adapter->mii_bus);
+ kfree(adapter->mii_bus->irq);
+ mdiobus_free(adapter->mii_bus);
+
+ et131x_adapter_memory_free(adapter);
+ iounmap(adapter->regs);
+ pci_dev_put(pdev);
+
+ free_netdev(netdev);
+ pci_release_regions(pdev);
+ pci_disable_device(pdev);
+}
+
+static void et131x_up(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ et131x_enable_txrx(netdev);
+ phy_start(adapter->phydev);
+}
+
+static void et131x_down(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ /* Save the timestamp for the TX watchdog, prevent a timeout */
+ netdev->trans_start = jiffies;
+
+ phy_stop(adapter->phydev);
+ et131x_disable_txrx(netdev);
+}
+
+#ifdef CONFIG_PM_SLEEP
+static int et131x_suspend(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct net_device *netdev = pci_get_drvdata(pdev);
+
+ if (netif_running(netdev)) {
+ netif_device_detach(netdev);
+ et131x_down(netdev);
+ pci_save_state(pdev);
+ }
+
+ return 0;
+}
+
+static int et131x_resume(struct device *dev)
+{
+ struct pci_dev *pdev = to_pci_dev(dev);
+ struct net_device *netdev = pci_get_drvdata(pdev);
+
+ if (netif_running(netdev)) {
+ pci_restore_state(pdev);
+ et131x_up(netdev);
+ netif_device_attach(netdev);
+ }
+
+ return 0;
+}
+#endif
+
+static SIMPLE_DEV_PM_OPS(et131x_pm_ops, et131x_suspend, et131x_resume);
+
+static irqreturn_t et131x_isr(int irq, void *dev_id)
+{
+ bool handled = true;
+ bool enable_interrupts = true;
+ struct net_device *netdev = dev_id;
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct address_map __iomem *iomem = adapter->regs;
+ struct rx_ring *rx_ring = &adapter->rx_ring;
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+ u32 status;
+
+ if (!netif_device_present(netdev)) {
+ handled = false;
+ enable_interrupts = false;
+ goto out;
+ }
+
+ et131x_disable_interrupts(adapter);
+
+ status = readl(&adapter->regs->global.int_status);
+
+ if (adapter->flow == FLOW_TXONLY || adapter->flow == FLOW_BOTH)
+ status &= ~INT_MASK_ENABLE;
+ else
+ status &= ~INT_MASK_ENABLE_NO_FLOW;
+
+ /* Make sure this is our interrupt */
+ if (!status) {
+ handled = false;
+ et131x_enable_interrupts(adapter);
+ goto out;
+ }
+
+ /* This is our interrupt, so process accordingly */
+ if (status & ET_INTR_WATCHDOG) {
+ struct tcb *tcb = tx_ring->send_head;
+
+ if (tcb)
+ if (++tcb->stale > 1)
+ status |= ET_INTR_TXDMA_ISR;
+
+ if (rx_ring->unfinished_receives)
+ status |= ET_INTR_RXDMA_XFR_DONE;
+ else if (tcb == NULL)
+ writel(0, &adapter->regs->global.watchdog_timer);
+
+ status &= ~ET_INTR_WATCHDOG;
+ }
+
+ if (status & (ET_INTR_RXDMA_XFR_DONE | ET_INTR_TXDMA_ISR)) {
+ enable_interrupts = false;
+ napi_schedule(&adapter->napi);
+ }
+
+ status &= ~(ET_INTR_TXDMA_ISR | ET_INTR_RXDMA_XFR_DONE);
+
+ if (!status)
+ goto out;
+
+ if (status & ET_INTR_TXDMA_ERR) {
+ /* Following read also clears the register (COR) */
+ u32 txdma_err = readl(&iomem->txdma.tx_dma_error);
+
+ dev_warn(&adapter->pdev->dev,
+ "TXDMA_ERR interrupt, error = %d\n",
+ txdma_err);
+ }
+
+ if (status & (ET_INTR_RXDMA_FB_R0_LOW | ET_INTR_RXDMA_FB_R1_LOW)) {
+ /* This indicates the number of unused buffers in RXDMA free
+ * buffer ring 0 is <= the limit you programmed. Free buffer
+ * resources need to be returned. Free buffers are consumed as
+ * packets are passed from the network to the host. The host
+ * becomes aware of the packets from the contents of the packet
+ * status ring. This ring is queried when the packet done
+ * interrupt occurs. Packets are then passed to the OS. When
+ * the OS is done with the packets the resources can be
+ * returned to the ET1310 for re-use. This interrupt is one
+ * method of returning resources.
+ */
+
+ /* If the user has flow control on, then we will
+ * send a pause packet, otherwise just exit
+ */
+ if (adapter->flow == FLOW_TXONLY || adapter->flow == FLOW_BOTH) {
+ u32 pm_csr;
+
+ /* Tell the device to send a pause packet via the back
+ * pressure register (bp req and bp xon/xoff)
+ */
+ pm_csr = readl(&iomem->global.pm_csr);
+ if (!et1310_in_phy_coma(adapter))
+ writel(3, &iomem->txmac.bp_ctrl);
+ }
+ }
+
+ /* Handle Packet Status Ring Low Interrupt */
+ if (status & ET_INTR_RXDMA_STAT_LOW) {
+ /* Same idea as with the two Free Buffer Rings. Packets going
+ * from the network to the host each consume a free buffer
+ * resource and a packet status resource. These resources are
+ * passed to the OS. When the OS is done with the resources,
+ * they need to be returned to the ET1310. This is one method
+ * of returning the resources.
+ */
+ }
+
+ if (status & ET_INTR_RXDMA_ERR) {
+ /* The rxdma_error interrupt is sent when a time-out on a
+ * request issued by the JAGCore has occurred or a completion is
+ * returned with an un-successful status. In both cases the
+ * request is considered complete. The JAGCore will
+ * automatically re-try the request in question. Normally
+ * information on events like these are sent to the host using
+ * the "Advanced Error Reporting" capability. This interrupt is
+ * another way of getting similar information. The only thing
+ * required is to clear the interrupt by reading the ISR in the
+ * global resources. The JAGCore will do a re-try on the
+ * request. Normally you should never see this interrupt. If
+ * you start to see this interrupt occurring frequently then
+ * something bad has occurred. A reset might be the thing to do.
+ */
+ /* TRAP();*/
+
+ dev_warn(&adapter->pdev->dev, "RxDMA_ERR interrupt, error %x\n",
+ readl(&iomem->txmac.tx_test));
+ }
+
+ /* Handle the Wake on LAN Event */
+ if (status & ET_INTR_WOL) {
+ /* This is a secondary interrupt for wake on LAN. The driver
+ * should never see this, if it does, something serious is
+ * wrong.
+ */
+ dev_err(&adapter->pdev->dev, "WAKE_ON_LAN interrupt\n");
+ }
+
+ if (status & ET_INTR_TXMAC) {
+ u32 err = readl(&iomem->txmac.err);
+
+ /* When any of the errors occur and TXMAC generates an
+ * interrupt to report these errors, it usually means that
+ * TXMAC has detected an error in the data stream retrieved
+ * from the on-chip Tx Q. All of these errors are catastrophic
+ * and TXMAC won't be able to recover data when these errors
+ * occur. In a nutshell, the whole Tx path will have to be reset
+ * and re-configured afterwards.
+ */
+ dev_warn(&adapter->pdev->dev, "TXMAC interrupt, error 0x%08x\n",
+ err);
+
+ /* If we are debugging, we want to see this error, otherwise we
+ * just want the device to be reset and continue
+ */
+ }
+
+ if (status & ET_INTR_RXMAC) {
+ /* These interrupts are catastrophic to the device, what we need
+ * to do is disable the interrupts and set the flag to cause us
+ * to reset so we can solve this issue.
+ */
+ dev_warn(&adapter->pdev->dev,
+ "RXMAC interrupt, error 0x%08x. Requesting reset\n",
+ readl(&iomem->rxmac.err_reg));
+
+ dev_warn(&adapter->pdev->dev,
+ "Enable 0x%08x, Diag 0x%08x\n",
+ readl(&iomem->rxmac.ctrl),
+ readl(&iomem->rxmac.rxq_diag));
+
+ /* If we are debugging, we want to see this error, otherwise we
+ * just want the device to be reset and continue
+ */
+ }
+
+ if (status & ET_INTR_MAC_STAT) {
+ /* This means at least one of the un-masked counters in the
+ * MAC_STAT block has rolled over. Use this to maintain the top,
+ * software managed bits of the counter(s).
+ */
+ et1310_handle_macstat_interrupt(adapter);
+ }
+
+ if (status & ET_INTR_SLV_TIMEOUT) {
+ /* This means a timeout has occurred on a read or write request
+ * to one of the JAGCore registers. The Global Resources block
+ * has terminated the request and on a read request, returned a
+ * "fake" value. The most likely reasons are: Bad Address or the
+ * addressed module is in a power-down state and can't respond.
+ */
+ }
+
+out:
+ if (enable_interrupts)
+ et131x_enable_interrupts(adapter);
+
+ return IRQ_RETVAL(handled);
+}
+
+static int et131x_poll(struct napi_struct *napi, int budget)
+{
+ struct et131x_adapter *adapter =
+ container_of(napi, struct et131x_adapter, napi);
+ int work_done = et131x_handle_recv_pkts(adapter, budget);
+
+ et131x_handle_send_pkts(adapter);
+
+ if (work_done < budget) {
+ napi_complete(&adapter->napi);
+ et131x_enable_interrupts(adapter);
+ }
+
+ return work_done;
+}
+
+/* et131x_stats - Return the current device statistics */
+static struct net_device_stats *et131x_stats(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct net_device_stats *stats = &adapter->netdev->stats;
+ struct ce_stats *devstat = &adapter->stats;
+
+ stats->rx_errors = devstat->rx_length_errs +
+ devstat->rx_align_errs +
+ devstat->rx_crc_errs +
+ devstat->rx_code_violations +
+ devstat->rx_other_errs;
+ stats->tx_errors = devstat->tx_max_pkt_errs;
+ stats->multicast = devstat->multicast_pkts_rcvd;
+ stats->collisions = devstat->tx_collisions;
+
+ stats->rx_length_errors = devstat->rx_length_errs;
+ stats->rx_over_errors = devstat->rx_overflows;
+ stats->rx_crc_errors = devstat->rx_crc_errs;
+ stats->rx_dropped = devstat->rcvd_pkts_dropped;
+
+ /* NOTE: Not used, can't find analogous statistics */
+ /* stats->rx_frame_errors = devstat->; */
+ /* stats->rx_fifo_errors = devstat->; */
+ /* stats->rx_missed_errors = devstat->; */
+
+ /* stats->tx_aborted_errors = devstat->; */
+ /* stats->tx_carrier_errors = devstat->; */
+ /* stats->tx_fifo_errors = devstat->; */
+ /* stats->tx_heartbeat_errors = devstat->; */
+ /* stats->tx_window_errors = devstat->; */
+ return stats;
+}
+
+static int et131x_open(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct pci_dev *pdev = adapter->pdev;
+ unsigned int irq = pdev->irq;
+ int result;
+
+ /* Start the timer to track NIC errors */
+ init_timer(&adapter->error_timer);
+ adapter->error_timer.expires = jiffies +
+ msecs_to_jiffies(TX_ERROR_PERIOD);
+ adapter->error_timer.function = et131x_error_timer_handler;
+ adapter->error_timer.data = (unsigned long)adapter;
+ add_timer(&adapter->error_timer);
+
+ result = request_irq(irq, et131x_isr,
+ IRQF_SHARED, netdev->name, netdev);
+ if (result) {
+ dev_err(&pdev->dev, "could not register IRQ %d\n", irq);
+ return result;
+ }
+
+ adapter->flags |= FMP_ADAPTER_INTERRUPT_IN_USE;
+
+ napi_enable(&adapter->napi);
+
+ et131x_up(netdev);
+
+ return result;
+}
+
+static int et131x_close(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ et131x_down(netdev);
+ napi_disable(&adapter->napi);
+
+ adapter->flags &= ~FMP_ADAPTER_INTERRUPT_IN_USE;
+ free_irq(adapter->pdev->irq, netdev);
+
+ /* Stop the error timer */
+ return del_timer_sync(&adapter->error_timer);
+}
+
+static int et131x_ioctl(struct net_device *netdev, struct ifreq *reqbuf,
+ int cmd)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ if (!adapter->phydev)
+ return -EINVAL;
+
+ return phy_mii_ioctl(adapter->phydev, reqbuf, cmd);
+}
+
+/* et131x_set_packet_filter - Configures the Rx Packet filtering */
+static int et131x_set_packet_filter(struct et131x_adapter *adapter)
+{
+ int filter = adapter->packet_filter;
+ u32 ctrl;
+ u32 pf_ctrl;
+
+ ctrl = readl(&adapter->regs->rxmac.ctrl);
+ pf_ctrl = readl(&adapter->regs->rxmac.pf_ctrl);
+
+ /* Default to disabled packet filtering */
+ ctrl |= 0x04;
+
+ /* Set us to be in promiscuous mode so we receive everything, this
+ * is also true when we get a packet filter of 0
+ */
+ if ((filter & ET131X_PACKET_TYPE_PROMISCUOUS) || filter == 0)
+ pf_ctrl &= ~7; /* Clear filter bits */
+ else {
+ /* Set us up with Multicast packet filtering. Three cases are
+ * possible - (1) we have a multi-cast list, (2) we receive ALL
+ * multicast entries or (3) we receive none.
+ */
+ if (filter & ET131X_PACKET_TYPE_ALL_MULTICAST)
+ pf_ctrl &= ~2; /* Multicast filter bit */
+ else {
+ et1310_setup_device_for_multicast(adapter);
+ pf_ctrl |= 2;
+ ctrl &= ~0x04;
+ }
+
+ /* Set us up with Unicast packet filtering */
+ if (filter & ET131X_PACKET_TYPE_DIRECTED) {
+ et1310_setup_device_for_unicast(adapter);
+ pf_ctrl |= 4;
+ ctrl &= ~0x04;
+ }
+
+ /* Set us up with Broadcast packet filtering */
+ if (filter & ET131X_PACKET_TYPE_BROADCAST) {
+ pf_ctrl |= 1; /* Broadcast filter bit */
+ ctrl &= ~0x04;
+ } else {
+ pf_ctrl &= ~1;
+ }
+
+ /* Setup the receive mac configuration registers - Packet
+ * Filter control + the enable / disable for packet filter
+ * in the control reg.
+ */
+ writel(pf_ctrl, &adapter->regs->rxmac.pf_ctrl);
+ writel(ctrl, &adapter->regs->rxmac.ctrl);
+ }
+ return 0;
+}
+
+static void et131x_multicast(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ int packet_filter;
+ struct netdev_hw_addr *ha;
+ int i;
+
+ /* Before we modify the platform-independent filter flags, store them
+ * locally. This allows us to determine if anything's changed and if
+ * we even need to bother the hardware
+ */
+ packet_filter = adapter->packet_filter;
+
+ /* Clear the 'multicast' flag locally; because we only have a single
+ * flag to check multicast, and multiple multicast addresses can be
+ * set, this is the easiest way to determine if more than one
+ * multicast address is being set.
+ */
+ packet_filter &= ~ET131X_PACKET_TYPE_MULTICAST;
+
+ /* Check the net_device flags and set the device independent flags
+ * accordingly
+ */
+ if (netdev->flags & IFF_PROMISC)
+ adapter->packet_filter |= ET131X_PACKET_TYPE_PROMISCUOUS;
+ else
+ adapter->packet_filter &= ~ET131X_PACKET_TYPE_PROMISCUOUS;
+
+ if ((netdev->flags & IFF_ALLMULTI) ||
+ (netdev_mc_count(netdev) > NIC_MAX_MCAST_LIST))
+ adapter->packet_filter |= ET131X_PACKET_TYPE_ALL_MULTICAST;
+
+ if (netdev_mc_count(netdev) < 1) {
+ adapter->packet_filter &= ~ET131X_PACKET_TYPE_ALL_MULTICAST;
+ adapter->packet_filter &= ~ET131X_PACKET_TYPE_MULTICAST;
+ } else {
+ adapter->packet_filter |= ET131X_PACKET_TYPE_MULTICAST;
+ }
+
+ /* Set values in the private adapter struct */
+ i = 0;
+ netdev_for_each_mc_addr(ha, netdev) {
+ if (i == NIC_MAX_MCAST_LIST)
+ break;
+ ether_addr_copy(adapter->multicast_list[i++], ha->addr);
+ }
+ adapter->multicast_addr_count = i;
+
+ /* Are the new flags different from the previous ones? If not, then no
+ * action is required
+ *
+ * NOTE - This block will always update the multicast_list with the
+ * hardware, even if the addresses aren't the same.
+ */
+ if (packet_filter != adapter->packet_filter)
+ et131x_set_packet_filter(adapter);
+}
+
+static netdev_tx_t et131x_tx(struct sk_buff *skb, struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+
+ /* stop the queue if it's getting full */
+ if (tx_ring->used >= NUM_TCB - 1 && !netif_queue_stopped(netdev))
+ netif_stop_queue(netdev);
+
+ /* Save the timestamp for the TX timeout watchdog */
+ netdev->trans_start = jiffies;
+
+ /* TCB is not available */
+ if (tx_ring->used >= NUM_TCB)
+ goto drop_err;
+
+ if ((adapter->flags & FMP_ADAPTER_FAIL_SEND_MASK) ||
+ !netif_carrier_ok(netdev))
+ goto drop_err;
+
+ if (send_packet(skb, adapter))
+ goto drop_err;
+
+ return NETDEV_TX_OK;
+
+drop_err:
+ dev_kfree_skb_any(skb);
+ adapter->netdev->stats.tx_dropped++;
+ return NETDEV_TX_OK;
+}
+
+/* et131x_tx_timeout - Timeout handler
+ *
+ * The handler called when a Tx request times out. The timeout period is
+ * specified by the 'tx_timeo" element in the net_device structure (see
+ * et131x_alloc_device() to see how this value is set).
+ */
+static void et131x_tx_timeout(struct net_device *netdev)
+{
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+ struct tx_ring *tx_ring = &adapter->tx_ring;
+ struct tcb *tcb;
+ unsigned long flags;
+
+ /* If the device is closed, ignore the timeout */
+ if (~(adapter->flags & FMP_ADAPTER_INTERRUPT_IN_USE))
+ return;
+
+ /* Any nonrecoverable hardware error?
+ * Checks adapter->flags for any failure in phy reading
+ */
+ if (adapter->flags & FMP_ADAPTER_NON_RECOVER_ERROR)
+ return;
+
+ /* Hardware failure? */
+ if (adapter->flags & FMP_ADAPTER_HARDWARE_ERROR) {
+ dev_err(&adapter->pdev->dev, "hardware error - reset\n");
+ return;
+ }
+
+ /* Is send stuck? */
+ spin_lock_irqsave(&adapter->tcb_send_qlock, flags);
+ tcb = tx_ring->send_head;
+ spin_unlock_irqrestore(&adapter->tcb_send_qlock, flags);
+
+ if (tcb) {
+ tcb->count++;
+
+ if (tcb->count > NIC_SEND_HANG_THRESHOLD) {
+ dev_warn(&adapter->pdev->dev,
+ "Send stuck - reset. tcb->WrIndex %x\n",
+ tcb->index);
+
+ adapter->netdev->stats.tx_errors++;
+
+ /* perform reset of tx/rx */
+ et131x_disable_txrx(netdev);
+ et131x_enable_txrx(netdev);
+ }
+ }
+}
+
+static int et131x_change_mtu(struct net_device *netdev, int new_mtu)
+{
+ int result = 0;
+ struct et131x_adapter *adapter = netdev_priv(netdev);
+
+ if (new_mtu < 64 || new_mtu > 9216)
+ return -EINVAL;
+
+ et131x_disable_txrx(netdev);
+
+ netdev->mtu = new_mtu;
+
+ et131x_adapter_memory_free(adapter);
+
+ /* Set the config parameter for Jumbo Packet support */
+ adapter->registry_jumbo_packet = new_mtu + 14;
+ et131x_soft_reset(adapter);
+
+ result = et131x_adapter_memory_alloc(adapter);
+ if (result != 0) {
+ dev_warn(&adapter->pdev->dev,
+ "Change MTU failed; couldn't re-alloc DMA memory\n");
+ return result;
+ }
+
+ et131x_init_send(adapter);
+ et131x_hwaddr_init(adapter);
+ ether_addr_copy(netdev->dev_addr, adapter->addr);
+
+ /* Init the device with the new settings */
+ et131x_adapter_setup(adapter);
+ et131x_enable_txrx(netdev);
+
+ return result;
+}
+
+static const struct net_device_ops et131x_netdev_ops = {
+ .ndo_open = et131x_open,
+ .ndo_stop = et131x_close,
+ .ndo_start_xmit = et131x_tx,
+ .ndo_set_rx_mode = et131x_multicast,
+ .ndo_tx_timeout = et131x_tx_timeout,
+ .ndo_change_mtu = et131x_change_mtu,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+ .ndo_get_stats = et131x_stats,
+ .ndo_do_ioctl = et131x_ioctl,
+};
+
+static int et131x_pci_setup(struct pci_dev *pdev,
+ const struct pci_device_id *ent)
+{
+ struct net_device *netdev;
+ struct et131x_adapter *adapter;
+ int rc;
+ int ii;
+
+ rc = pci_enable_device(pdev);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "pci_enable_device() failed\n");
+ goto out;
+ }
+
+ /* Perform some basic PCI checks */
+ if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
+ dev_err(&pdev->dev, "Can't find PCI device's base address\n");
+ rc = -ENODEV;
+ goto err_disable;
+ }
+
+ rc = pci_request_regions(pdev, DRIVER_NAME);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "Can't get PCI resources\n");
+ goto err_disable;
+ }
+
+ pci_set_master(pdev);
+
+ /* Check the DMA addressing support of this device */
+ if (dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)) &&
+ dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32))) {
+ dev_err(&pdev->dev, "No usable DMA addressing method\n");
+ rc = -EIO;
+ goto err_release_res;
+ }
+
+ netdev = alloc_etherdev(sizeof(struct et131x_adapter));
+ if (!netdev) {
+ dev_err(&pdev->dev, "Couldn't alloc netdev struct\n");
+ rc = -ENOMEM;
+ goto err_release_res;
+ }
+
+ netdev->watchdog_timeo = ET131X_TX_TIMEOUT;
+ netdev->netdev_ops = &et131x_netdev_ops;
+
+ SET_NETDEV_DEV(netdev, &pdev->dev);
+ netdev->ethtool_ops = &et131x_ethtool_ops;
+
+ adapter = et131x_adapter_init(netdev, pdev);
+
+ rc = et131x_pci_init(adapter, pdev);
+ if (rc < 0)
+ goto err_free_dev;
+
+ /* Map the bus-relative registers to system virtual memory */
+ adapter->regs = pci_ioremap_bar(pdev, 0);
+ if (!adapter->regs) {
+ dev_err(&pdev->dev, "Cannot map device registers\n");
+ rc = -ENOMEM;
+ goto err_free_dev;
+ }
+
+ /* If Phy COMA mode was enabled when we went down, disable it here. */
+ writel(ET_PMCSR_INIT, &adapter->regs->global.pm_csr);
+
+ et131x_soft_reset(adapter);
+ et131x_disable_interrupts(adapter);
+
+ rc = et131x_adapter_memory_alloc(adapter);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "Could not alloc adapter memory (DMA)\n");
+ goto err_iounmap;
+ }
+
+ et131x_init_send(adapter);
+
+ netif_napi_add(netdev, &adapter->napi, et131x_poll, 64);
+
+ ether_addr_copy(netdev->dev_addr, adapter->addr);
+
+ rc = -ENOMEM;
+
+ adapter->mii_bus = mdiobus_alloc();
+ if (!adapter->mii_bus) {
+ dev_err(&pdev->dev, "Alloc of mii_bus struct failed\n");
+ goto err_mem_free;
+ }
+
+ adapter->mii_bus->name = "et131x_eth_mii";
+ snprintf(adapter->mii_bus->id, MII_BUS_ID_SIZE, "%x",
+ (adapter->pdev->bus->number << 8) | adapter->pdev->devfn);
+ adapter->mii_bus->priv = netdev;
+ adapter->mii_bus->read = et131x_mdio_read;
+ adapter->mii_bus->write = et131x_mdio_write;
+ adapter->mii_bus->irq = kmalloc_array(PHY_MAX_ADDR, sizeof(int),
+ GFP_KERNEL);
+ if (!adapter->mii_bus->irq)
+ goto err_mdio_free;
+
+ for (ii = 0; ii < PHY_MAX_ADDR; ii++)
+ adapter->mii_bus->irq[ii] = PHY_POLL;
+
+ rc = mdiobus_register(adapter->mii_bus);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "failed to register MII bus\n");
+ goto err_mdio_free_irq;
+ }
+
+ rc = et131x_mii_probe(netdev);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "failed to probe MII bus\n");
+ goto err_mdio_unregister;
+ }
+
+ et131x_adapter_setup(adapter);
+
+ /* Init variable for counting how long we do not have link status */
+ adapter->boot_coma = 0;
+ et1310_disable_phy_coma(adapter);
+
+ /* We can enable interrupts now
+ *
+ * NOTE - Because registration of interrupt handler is done in the
+ * device's open(), defer enabling device interrupts to that
+ * point
+ */
+
+ rc = register_netdev(netdev);
+ if (rc < 0) {
+ dev_err(&pdev->dev, "register_netdev() failed\n");
+ goto err_phy_disconnect;
+ }
+
+ /* Register the net_device struct with the PCI subsystem. Save a copy
+ * of the PCI config space for this device now that the device has
+ * been initialized, just in case it needs to be quickly restored.
+ */
+ pci_set_drvdata(pdev, netdev);
+out:
+ return rc;
+
+err_phy_disconnect:
+ phy_disconnect(adapter->phydev);
+err_mdio_unregister:
+ mdiobus_unregister(adapter->mii_bus);
+err_mdio_free_irq:
+ kfree(adapter->mii_bus->irq);
+err_mdio_free:
+ mdiobus_free(adapter->mii_bus);
+err_mem_free:
+ et131x_adapter_memory_free(adapter);
+err_iounmap:
+ iounmap(adapter->regs);
+err_free_dev:
+ pci_dev_put(pdev);
+ free_netdev(netdev);
+err_release_res:
+ pci_release_regions(pdev);
+err_disable:
+ pci_disable_device(pdev);
+ goto out;
+}
+
+static const struct pci_device_id et131x_pci_table[] = {
+ { PCI_VDEVICE(ATT, ET131X_PCI_DEVICE_ID_GIG), 0UL},
+ { PCI_VDEVICE(ATT, ET131X_PCI_DEVICE_ID_FAST), 0UL},
+ { 0,}
+};
+MODULE_DEVICE_TABLE(pci, et131x_pci_table);
+
+static struct pci_driver et131x_driver = {
+ .name = DRIVER_NAME,
+ .id_table = et131x_pci_table,
+ .probe = et131x_pci_setup,
+ .remove = et131x_pci_remove,
+ .driver.pm = &et131x_pm_ops,
+};
+
+module_pci_driver(et131x_driver);
Code Review / kvmfornfv.git / blobdiff