diff options
author | Mark Einon <mark.einon@gmail.com> | 2011-10-20 01:18:30 +0100 |
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committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-10-23 10:03:40 +0200 |
commit | d2796743cba2d30f018e10288effce53fbd53fbe (patch) | |
tree | e2a9ddf8346fc3af57a9f81d0bf722075bac576b /drivers/staging/et131x/et131x_isr.c | |
parent | cd8eca6f77108617a8c47a800533f1b78a357a79 (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.c | 442 |
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); -} |