![Taku Izumi](/assets/img/avatar_default.png)
This patch adds net_device_ops.ndo_open and .ndo_stop callback. These function is called when network device activation and deactivation. Signed-off-by: Taku Izumi <izumi.taku@jp.fujitsu.com> Signed-off-by: David S. Miller <davem@davemloft.net>
554 lines
13 KiB
C
554 lines
13 KiB
C
/*
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* FUJITSU Extended Socket Network Device driver
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* Copyright (c) 2015 FUJITSU LIMITED
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, see <http://www.gnu.org/licenses/>.
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*
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* The full GNU General Public License is included in this distribution in
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* the file called "COPYING".
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*
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*/
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#include <linux/module.h>
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#include <linux/types.h>
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#include <linux/nls.h>
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#include <linux/platform_device.h>
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#include <linux/netdevice.h>
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#include <linux/interrupt.h>
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#include "fjes.h"
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#define MAJ 1
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#define MIN 0
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#define DRV_VERSION __stringify(MAJ) "." __stringify(MIN)
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#define DRV_NAME "fjes"
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char fjes_driver_name[] = DRV_NAME;
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char fjes_driver_version[] = DRV_VERSION;
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static const char fjes_driver_string[] =
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"FUJITSU Extended Socket Network Device Driver";
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static const char fjes_copyright[] =
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"Copyright (c) 2015 FUJITSU LIMITED";
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MODULE_AUTHOR("Taku Izumi <izumi.taku@jp.fujitsu.com>");
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MODULE_DESCRIPTION("FUJITSU Extended Socket Network Device Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(DRV_VERSION);
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static int fjes_request_irq(struct fjes_adapter *);
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static void fjes_free_irq(struct fjes_adapter *);
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static int fjes_open(struct net_device *);
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static int fjes_close(struct net_device *);
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static int fjes_setup_resources(struct fjes_adapter *);
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static void fjes_free_resources(struct fjes_adapter *);
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static irqreturn_t fjes_intr(int, void*);
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static int fjes_acpi_add(struct acpi_device *);
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static int fjes_acpi_remove(struct acpi_device *);
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static acpi_status fjes_get_acpi_resource(struct acpi_resource *, void*);
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static int fjes_probe(struct platform_device *);
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static int fjes_remove(struct platform_device *);
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static int fjes_sw_init(struct fjes_adapter *);
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static void fjes_netdev_setup(struct net_device *);
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static const struct acpi_device_id fjes_acpi_ids[] = {
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{"PNP0C02", 0},
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{"", 0},
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};
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MODULE_DEVICE_TABLE(acpi, fjes_acpi_ids);
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static struct acpi_driver fjes_acpi_driver = {
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.name = DRV_NAME,
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.class = DRV_NAME,
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.owner = THIS_MODULE,
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.ids = fjes_acpi_ids,
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.ops = {
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.add = fjes_acpi_add,
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.remove = fjes_acpi_remove,
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},
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};
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static struct platform_driver fjes_driver = {
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.driver = {
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.name = DRV_NAME,
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.owner = THIS_MODULE,
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},
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.probe = fjes_probe,
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.remove = fjes_remove,
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};
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static struct resource fjes_resource[] = {
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{
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.flags = IORESOURCE_MEM,
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.start = 0,
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.end = 0,
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},
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{
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.flags = IORESOURCE_IRQ,
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.start = 0,
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.end = 0,
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},
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};
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static int fjes_acpi_add(struct acpi_device *device)
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{
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struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL};
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char str_buf[sizeof(FJES_ACPI_SYMBOL) + 1];
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struct platform_device *plat_dev;
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union acpi_object *str;
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acpi_status status;
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int result;
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status = acpi_evaluate_object(device->handle, "_STR", NULL, &buffer);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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str = buffer.pointer;
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result = utf16s_to_utf8s((wchar_t *)str->string.pointer,
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str->string.length, UTF16_LITTLE_ENDIAN,
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str_buf, sizeof(str_buf) - 1);
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str_buf[result] = 0;
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if (strncmp(FJES_ACPI_SYMBOL, str_buf, strlen(FJES_ACPI_SYMBOL)) != 0) {
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kfree(buffer.pointer);
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return -ENODEV;
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}
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kfree(buffer.pointer);
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status = acpi_walk_resources(device->handle, METHOD_NAME__CRS,
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fjes_get_acpi_resource, fjes_resource);
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if (ACPI_FAILURE(status))
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return -ENODEV;
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/* create platform_device */
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plat_dev = platform_device_register_simple(DRV_NAME, 0, fjes_resource,
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ARRAY_SIZE(fjes_resource));
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device->driver_data = plat_dev;
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return 0;
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}
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static int fjes_acpi_remove(struct acpi_device *device)
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{
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struct platform_device *plat_dev;
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plat_dev = (struct platform_device *)acpi_driver_data(device);
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platform_device_unregister(plat_dev);
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return 0;
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}
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static acpi_status
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fjes_get_acpi_resource(struct acpi_resource *acpi_res, void *data)
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{
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struct acpi_resource_address32 *addr;
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struct acpi_resource_irq *irq;
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struct resource *res = data;
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switch (acpi_res->type) {
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case ACPI_RESOURCE_TYPE_ADDRESS32:
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addr = &acpi_res->data.address32;
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res[0].start = addr->address.minimum;
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res[0].end = addr->address.minimum +
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addr->address.address_length - 1;
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break;
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case ACPI_RESOURCE_TYPE_IRQ:
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irq = &acpi_res->data.irq;
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if (irq->interrupt_count != 1)
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return AE_ERROR;
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res[1].start = irq->interrupts[0];
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res[1].end = irq->interrupts[0];
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break;
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default:
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break;
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}
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return AE_OK;
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}
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static int fjes_request_irq(struct fjes_adapter *adapter)
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{
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struct net_device *netdev = adapter->netdev;
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int result = -1;
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if (!adapter->irq_registered) {
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result = request_irq(adapter->hw.hw_res.irq, fjes_intr,
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IRQF_SHARED, netdev->name, adapter);
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if (result)
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adapter->irq_registered = false;
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else
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adapter->irq_registered = true;
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}
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return result;
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}
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static void fjes_free_irq(struct fjes_adapter *adapter)
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{
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struct fjes_hw *hw = &adapter->hw;
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fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, true);
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if (adapter->irq_registered) {
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free_irq(adapter->hw.hw_res.irq, adapter);
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adapter->irq_registered = false;
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}
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}
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static const struct net_device_ops fjes_netdev_ops = {
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.ndo_open = fjes_open,
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.ndo_stop = fjes_close,
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};
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/* fjes_open - Called when a network interface is made active */
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static int fjes_open(struct net_device *netdev)
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{
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struct fjes_adapter *adapter = netdev_priv(netdev);
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struct fjes_hw *hw = &adapter->hw;
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int result;
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if (adapter->open_guard)
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return -ENXIO;
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result = fjes_setup_resources(adapter);
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if (result)
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goto err_setup_res;
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hw->txrx_stop_req_bit = 0;
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hw->epstop_req_bit = 0;
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fjes_hw_capture_interrupt_status(hw);
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result = fjes_request_irq(adapter);
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if (result)
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goto err_req_irq;
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fjes_hw_set_irqmask(hw, REG_ICTL_MASK_ALL, false);
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netif_tx_start_all_queues(netdev);
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netif_carrier_on(netdev);
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return 0;
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err_req_irq:
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fjes_free_irq(adapter);
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err_setup_res:
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fjes_free_resources(adapter);
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return result;
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}
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/* fjes_close - Disables a network interface */
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static int fjes_close(struct net_device *netdev)
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{
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struct fjes_adapter *adapter = netdev_priv(netdev);
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struct fjes_hw *hw = &adapter->hw;
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int epidx;
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netif_tx_stop_all_queues(netdev);
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netif_carrier_off(netdev);
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fjes_hw_raise_epstop(hw);
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for (epidx = 0; epidx < hw->max_epid; epidx++) {
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if (epidx == hw->my_epid)
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continue;
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adapter->hw.ep_shm_info[epidx].tx.info->v1i.rx_status &=
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~FJES_RX_POLL_WORK;
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}
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fjes_free_irq(adapter);
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fjes_hw_wait_epstop(hw);
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fjes_free_resources(adapter);
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return 0;
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}
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static int fjes_setup_resources(struct fjes_adapter *adapter)
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{
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struct net_device *netdev = adapter->netdev;
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struct ep_share_mem_info *buf_pair;
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struct fjes_hw *hw = &adapter->hw;
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int result;
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int epidx;
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mutex_lock(&hw->hw_info.lock);
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result = fjes_hw_request_info(hw);
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switch (result) {
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case 0:
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for (epidx = 0; epidx < hw->max_epid; epidx++) {
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hw->ep_shm_info[epidx].es_status =
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hw->hw_info.res_buf->info.info[epidx].es_status;
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hw->ep_shm_info[epidx].zone =
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hw->hw_info.res_buf->info.info[epidx].zone;
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}
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break;
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default:
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case -ENOMSG:
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case -EBUSY:
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adapter->force_reset = true;
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mutex_unlock(&hw->hw_info.lock);
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return result;
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}
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mutex_unlock(&hw->hw_info.lock);
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for (epidx = 0; epidx < (hw->max_epid); epidx++) {
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if ((epidx != hw->my_epid) &&
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(hw->ep_shm_info[epidx].es_status ==
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FJES_ZONING_STATUS_ENABLE)) {
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fjes_hw_raise_interrupt(hw, epidx,
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REG_ICTL_MASK_INFO_UPDATE);
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}
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}
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msleep(FJES_OPEN_ZONE_UPDATE_WAIT * hw->max_epid);
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for (epidx = 0; epidx < (hw->max_epid); epidx++) {
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if (epidx == hw->my_epid)
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continue;
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buf_pair = &hw->ep_shm_info[epidx];
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fjes_hw_setup_epbuf(&buf_pair->tx, netdev->dev_addr,
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netdev->mtu);
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if (fjes_hw_epid_is_same_zone(hw, epidx)) {
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mutex_lock(&hw->hw_info.lock);
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result =
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fjes_hw_register_buff_addr(hw, epidx, buf_pair);
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mutex_unlock(&hw->hw_info.lock);
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switch (result) {
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case 0:
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break;
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case -ENOMSG:
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case -EBUSY:
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default:
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adapter->force_reset = true;
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return result;
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}
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}
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}
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return 0;
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}
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static void fjes_free_resources(struct fjes_adapter *adapter)
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{
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struct net_device *netdev = adapter->netdev;
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struct fjes_device_command_param param;
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struct ep_share_mem_info *buf_pair;
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struct fjes_hw *hw = &adapter->hw;
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bool reset_flag = false;
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int result;
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int epidx;
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for (epidx = 0; epidx < hw->max_epid; epidx++) {
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if (epidx == hw->my_epid)
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continue;
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mutex_lock(&hw->hw_info.lock);
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result = fjes_hw_unregister_buff_addr(hw, epidx);
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mutex_unlock(&hw->hw_info.lock);
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if (result)
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reset_flag = true;
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buf_pair = &hw->ep_shm_info[epidx];
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fjes_hw_setup_epbuf(&buf_pair->tx,
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netdev->dev_addr, netdev->mtu);
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clear_bit(epidx, &hw->txrx_stop_req_bit);
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}
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if (reset_flag || adapter->force_reset) {
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result = fjes_hw_reset(hw);
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adapter->force_reset = false;
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if (result)
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adapter->open_guard = true;
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hw->hw_info.buffer_share_bit = 0;
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memset((void *)¶m, 0, sizeof(param));
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param.req_len = hw->hw_info.req_buf_size;
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param.req_start = __pa(hw->hw_info.req_buf);
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param.res_len = hw->hw_info.res_buf_size;
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param.res_start = __pa(hw->hw_info.res_buf);
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param.share_start = __pa(hw->hw_info.share->ep_status);
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fjes_hw_init_command_registers(hw, ¶m);
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}
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}
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static irqreturn_t fjes_intr(int irq, void *data)
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{
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struct fjes_adapter *adapter = data;
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struct fjes_hw *hw = &adapter->hw;
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irqreturn_t ret;
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u32 icr;
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icr = fjes_hw_capture_interrupt_status(hw);
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if (icr & REG_IS_MASK_IS_ASSERT)
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ret = IRQ_HANDLED;
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else
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ret = IRQ_NONE;
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return ret;
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}
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/* fjes_probe - Device Initialization Routine */
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static int fjes_probe(struct platform_device *plat_dev)
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{
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struct fjes_adapter *adapter;
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struct net_device *netdev;
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struct resource *res;
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struct fjes_hw *hw;
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int err;
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err = -ENOMEM;
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netdev = alloc_netdev_mq(sizeof(struct fjes_adapter), "es%d",
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NET_NAME_UNKNOWN, fjes_netdev_setup,
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FJES_MAX_QUEUES);
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if (!netdev)
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goto err_out;
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SET_NETDEV_DEV(netdev, &plat_dev->dev);
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dev_set_drvdata(&plat_dev->dev, netdev);
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adapter = netdev_priv(netdev);
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adapter->netdev = netdev;
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adapter->plat_dev = plat_dev;
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hw = &adapter->hw;
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hw->back = adapter;
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/* setup the private structure */
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err = fjes_sw_init(adapter);
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if (err)
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goto err_free_netdev;
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adapter->force_reset = false;
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adapter->open_guard = false;
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res = platform_get_resource(plat_dev, IORESOURCE_MEM, 0);
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hw->hw_res.start = res->start;
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hw->hw_res.size = res->end - res->start + 1;
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hw->hw_res.irq = platform_get_irq(plat_dev, 0);
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err = fjes_hw_init(&adapter->hw);
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if (err)
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goto err_free_netdev;
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/* setup MAC address (02:00:00:00:00:[epid])*/
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netdev->dev_addr[0] = 2;
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netdev->dev_addr[1] = 0;
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netdev->dev_addr[2] = 0;
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netdev->dev_addr[3] = 0;
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netdev->dev_addr[4] = 0;
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netdev->dev_addr[5] = hw->my_epid; /* EPID */
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err = register_netdev(netdev);
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if (err)
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goto err_hw_exit;
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netif_carrier_off(netdev);
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return 0;
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err_hw_exit:
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fjes_hw_exit(&adapter->hw);
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err_free_netdev:
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free_netdev(netdev);
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err_out:
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return err;
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}
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/* fjes_remove - Device Removal Routine */
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static int fjes_remove(struct platform_device *plat_dev)
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{
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struct net_device *netdev = dev_get_drvdata(&plat_dev->dev);
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struct fjes_adapter *adapter = netdev_priv(netdev);
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struct fjes_hw *hw = &adapter->hw;
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unregister_netdev(netdev);
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fjes_hw_exit(hw);
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free_netdev(netdev);
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return 0;
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}
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static int fjes_sw_init(struct fjes_adapter *adapter)
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{
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return 0;
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}
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/* fjes_netdev_setup - netdevice initialization routine */
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static void fjes_netdev_setup(struct net_device *netdev)
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{
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ether_setup(netdev);
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netdev->watchdog_timeo = FJES_TX_RETRY_INTERVAL;
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netdev->netdev_ops = &fjes_netdev_ops;
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netdev->mtu = fjes_support_mtu[0];
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netdev->flags |= IFF_BROADCAST;
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netdev->features |= NETIF_F_HW_CSUM | NETIF_F_HW_VLAN_CTAG_FILTER;
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}
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/* fjes_init_module - Driver Registration Routine */
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static int __init fjes_init_module(void)
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{
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int result;
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pr_info("%s - version %s - %s\n",
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fjes_driver_string, fjes_driver_version, fjes_copyright);
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|
|
result = platform_driver_register(&fjes_driver);
|
|
if (result < 0)
|
|
return result;
|
|
|
|
result = acpi_bus_register_driver(&fjes_acpi_driver);
|
|
if (result < 0)
|
|
goto fail_acpi_driver;
|
|
|
|
return 0;
|
|
|
|
fail_acpi_driver:
|
|
platform_driver_unregister(&fjes_driver);
|
|
return result;
|
|
}
|
|
|
|
module_init(fjes_init_module);
|
|
|
|
/* fjes_exit_module - Driver Exit Cleanup Routine */
|
|
static void __exit fjes_exit_module(void)
|
|
{
|
|
acpi_bus_unregister_driver(&fjes_acpi_driver);
|
|
platform_driver_unregister(&fjes_driver);
|
|
}
|
|
|
|
module_exit(fjes_exit_module);
|