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authorMark Einon <mark.einon@gmail.com>2011-10-20 01:18:30 +0100
committerGreg Kroah-Hartman <gregkh@suse.de>2011-10-23 10:03:40 +0200
commitd2796743cba2d30f018e10288effce53fbd53fbe (patch)
treee2a9ddf8346fc3af57a9f81d0bf722075bac576b /drivers/staging/et131x/et131x_isr.c
parentcd8eca6f77108617a8c47a800533f1b78a357a79 (diff)
staging: et131x: Put all .c files into one big file
Created one big .c file for the driver, moving the contents of all driver .c files into it. Signed-off-by: Mark Einon <mark.einon@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/et131x/et131x_isr.c')
-rw-r--r--drivers/staging/et131x/et131x_isr.c442
1 files changed, 0 insertions, 442 deletions
diff --git a/drivers/staging/et131x/et131x_isr.c b/drivers/staging/et131x/et131x_isr.c
deleted file mode 100644
index cf8665b12911..000000000000
--- a/drivers/staging/et131x/et131x_isr.c
+++ /dev/null
@@ -1,442 +0,0 @@
-/*
- * 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>
- *
- *------------------------------------------------------------------------------
- *
- * et131x_isr.c - File which contains the ISR, ISR handler, and related routines
- * for processing interrupts from the device.
- *
- *------------------------------------------------------------------------------
- *
- * SOFTWARE LICENSE
- *
- * This software is provided subject to the following terms and conditions,
- * which you should read carefully before using the software. Using this
- * software indicates your acceptance of these terms and conditions. If you do
- * not agree with these terms and conditions, do not use the software.
- *
- * Copyright © 2005 Agere Systems Inc.
- * All rights reserved.
- *
- * Redistribution and use in source or binary forms, with or without
- * modifications, are permitted provided that the following conditions are met:
- *
- * . Redistributions of source code must retain the above copyright notice, this
- * list of conditions and the following Disclaimer as comments in the code as
- * well as in the documentation and/or other materials provided with the
- * distribution.
- *
- * . Redistributions in binary form must reproduce the above copyright notice,
- * this list of conditions and the following Disclaimer in the documentation
- * and/or other materials provided with the distribution.
- *
- * . Neither the name of Agere Systems Inc. nor the names of the contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * Disclaimer
- *
- * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
- * INCLUDING, BUT NOT LIMITED TO, INFRINGEMENT AND THE IMPLIED WARRANTIES OF
- * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. ANY
- * USE, MODIFICATION OR DISTRIBUTION OF THIS SOFTWARE IS SOLELY AT THE USERS OWN
- * RISK. IN NO EVENT SHALL AGERE SYSTEMS INC. OR CONTRIBUTORS BE LIABLE FOR ANY
- * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
- * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
- * ON ANY THEORY OF LIABILITY, INCLUDING, BUT NOT LIMITED TO, CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
- * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
- * DAMAGE.
- *
- */
-
-#include "et131x_defs.h"
-
-#include <linux/init.h>
-#include <linux/module.h>
-#include <linux/types.h>
-#include <linux/kernel.h>
-
-#include <linux/sched.h>
-#include <linux/ptrace.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/io.h>
-#include <linux/bitops.h>
-#include <linux/pci.h>
-#include <asm/system.h>
-
-#include <linux/netdevice.h>
-#include <linux/etherdevice.h>
-#include <linux/skbuff.h>
-#include <linux/if_arp.h>
-#include <linux/ioport.h>
-
-#include "et1310_phy.h"
-#include "et131x_adapter.h"
-#include "et131x.h"
-
-/*
- * 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
-
-
-/**
- * et131x_enable_interrupts - enable interrupt
- * @adapter: et131x device
- *
- * Enable the appropriate interrupts on the ET131x according to our
- * configuration
- */
-
-void et131x_enable_interrupts(struct et131x_adapter *adapter)
-{
- u32 mask;
-
- /* Enable all global interrupts */
- if (adapter->flowcontrol == FLOW_TXONLY ||
- adapter->flowcontrol == FLOW_BOTH)
- mask = INT_MASK_ENABLE;
- else
- mask = INT_MASK_ENABLE_NO_FLOW;
-
- writel(mask, &adapter->regs->global.int_mask);
-}
-
-/**
- * et131x_disable_interrupts - interrupt disable
- * @adapter: et131x device
- *
- * Block all interrupts from the et131x device at the device itself
- */
-
-void et131x_disable_interrupts(struct et131x_adapter *adapter)
-{
- /* Disable all global interrupts */
- writel(INT_MASK_DISABLE, &adapter->regs->global.int_mask);
-}
-
-
-/**
- * et131x_isr - The Interrupt Service Routine for the driver.
- * @irq: the IRQ on which the interrupt was received.
- * @dev_id: device-specific info (here a pointer to a net_device struct)
- *
- * Returns a value indicating if the interrupt was handled.
- */
-
-irqreturn_t et131x_isr(int irq, void *dev_id)
-{
- bool handled = true;
- struct net_device *netdev = (struct net_device *)dev_id;
- struct et131x_adapter *adapter = NULL;
- u32 status;
-
- if (!netif_device_present(netdev)) {
- handled = false;
- goto out;
- }
-
- adapter = netdev_priv(netdev);
-
- /* If the adapter is in low power state, then it should not
- * recognize any interrupt
- */
-
- /* Disable Device Interrupts */
- et131x_disable_interrupts(adapter);
-
- /* Get a copy of the value in the interrupt status register
- * so we can process the interrupting section
- */
- status = readl(&adapter->regs->global.int_status);
-
- if (adapter->flowcontrol == FLOW_TXONLY ||
- adapter->flowcontrol == 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 = adapter->tx_ring.send_head;
-
- if (tcb)
- if (++tcb->stale > 1)
- status |= ET_INTR_TXDMA_ISR;
-
- if (adapter->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 == 0) {
- /* This interrupt has in some way been "handled" by
- * the ISR. Either it was a spurious Rx interrupt, or
- * it was a Tx interrupt that has been filtered by
- * the ISR.
- */
- et131x_enable_interrupts(adapter);
- goto out;
- }
-
- /* We need to save the interrupt status value for use in our
- * DPC. We will clear the software copy of that in that
- * routine.
- */
- adapter->stats.interrupt_status = status;
-
- /* Schedule the ISR handler as a bottom-half task in the
- * kernel's tq_immediate queue, and mark the queue for
- * execution
- */
- schedule_work(&adapter->task);
-out:
- return IRQ_RETVAL(handled);
-}
-
-/**
- * et131x_isr_handler - The ISR handler
- * @p_adapter, a pointer to the device's private adapter structure
- *
- * scheduled to run in a deferred context by the ISR. This is where the ISR's
- * work actually gets done.
- */
-void et131x_isr_handler(struct work_struct *work)
-{
- struct et131x_adapter *adapter =
- container_of(work, struct et131x_adapter, task);
- u32 status = adapter->stats.interrupt_status;
- struct address_map __iomem *iomem = adapter->regs;
-
- /*
- * These first two are by far the most common. Once handled, we clear
- * their two bits in the status word. If the word is now zero, we
- * exit.
- */
- /* Handle all the completed Transmit interrupts */
- if (status & ET_INTR_TXDMA_ISR)
- et131x_handle_send_interrupt(adapter);
-
- /* Handle all the completed Receives interrupts */
- if (status & ET_INTR_RXDMA_XFR_DONE)
- et131x_handle_recv_interrupt(adapter);
-
- status &= 0xffffffd7;
-
- if (status) {
- /* Handle the TXDMA Error interrupt */
- if (status & ET_INTR_TXDMA_ERR) {
- u32 txdma_err;
-
- /* Following read also clears the register (COR) */
- txdma_err = readl(&iomem->txdma.tx_dma_error);
-
- dev_warn(&adapter->pdev->dev,
- "TXDMA_ERR interrupt, error = %d\n",
- txdma_err);
- }
-
- /* Handle Free Buffer Ring 0 and 1 Low interrupt */
- 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->flowcontrol == FLOW_TXONLY ||
- adapter->flowcontrol == 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 resoures 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.
- */
- }
-
- /* Handle RXDMA Error Interrupt */
- 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. We will TRAP the
- * message when we are in DBG mode, otherwise we
- * will ignore it.
- */
- dev_err(&adapter->pdev->dev, "WAKE_ON_LAN interrupt\n");
- }
-
- /* Let's move on to the TxMac */
- 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
- */
- }
-
- /* Handle RXMAC Interrupt */
- 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.
- */
- /* MP_SET_FLAG( adapter,
- fMP_ADAPTER_HARDWARE_ERROR); */
-
- 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
- */
- }
-
- /* Handle MAC_STAT Interrupt */
- 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);
- }
-
- /* Handle SLV Timeout Interrupt */
- 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.
- */
- }
- }
- et131x_enable_interrupts(adapter);
-}