![Julia Lawall](/assets/img/avatar_default.png)
Use kcalloc or kzalloc rather than the combination of kmalloc and memset. The semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression x,y,flags; statement S; type T; @@ x = - kmalloc + kcalloc ( - y * sizeof(T), + y, sizeof(T), flags); if (x == NULL) S -memset(x, 0, y * sizeof(T)); @@ expression x,size,flags; statement S; @@ -x = kmalloc(size,flags); +x = kzalloc(size,flags); if (x == NULL) S -memset(x, 0, size); // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Signed-off-by: David S. Miller <davem@davemloft.net>
1637 lines
47 KiB
C
1637 lines
47 KiB
C
/**************************************************************************/
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/* */
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/* IBM eServer i/pSeries Virtual Ethernet Device Driver */
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/* Copyright (C) 2003 IBM Corp. */
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/* Originally written by Dave Larson (larson1@us.ibm.com) */
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/* Maintained by Santiago Leon (santil@us.ibm.com) */
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/* */
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/* This program is free software; you can redistribute it and/or modify */
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/* it under the terms of the GNU General Public License as published by */
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/* the Free Software Foundation; either version 2 of the License, or */
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/* (at your option) any later version. */
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/* */
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/* This program is distributed in the hope that it will be useful, */
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/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
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/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
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/* GNU General Public License for more details. */
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/* */
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/* You should have received a copy of the GNU General Public License */
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/* along with this program; if not, write to the Free Software */
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/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 */
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/* USA */
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/* */
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/* This module contains the implementation of a virtual ethernet device */
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/* for use with IBM i/pSeries LPAR Linux. It utilizes the logical LAN */
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/* option of the RS/6000 Platform Architechture to interface with virtual */
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/* ethernet NICs that are presented to the partition by the hypervisor. */
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/* */
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/**************************************************************************/
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/*
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TODO:
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- add support for sysfs
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- possibly remove procfs support
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/types.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/dma-mapping.h>
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#include <linux/kernel.h>
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#include <linux/netdevice.h>
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#include <linux/etherdevice.h>
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#include <linux/skbuff.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/mm.h>
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#include <linux/pm.h>
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#include <linux/ethtool.h>
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#include <linux/proc_fs.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/slab.h>
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#include <net/net_namespace.h>
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#include <asm/hvcall.h>
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#include <asm/atomic.h>
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#include <asm/vio.h>
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#include <asm/iommu.h>
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#include <asm/uaccess.h>
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#include <asm/firmware.h>
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#include <linux/seq_file.h>
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#include "ibmveth.h"
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#undef DEBUG
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#define ibmveth_printk(fmt, args...) \
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printk(KERN_DEBUG "%s: " fmt, __FILE__, ## args)
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#define ibmveth_error_printk(fmt, args...) \
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printk(KERN_ERR "(%s:%3.3d ua:%x) ERROR: " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
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#ifdef DEBUG
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#define ibmveth_debug_printk_no_adapter(fmt, args...) \
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printk(KERN_DEBUG "(%s:%3.3d): " fmt, __FILE__, __LINE__ , ## args)
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#define ibmveth_debug_printk(fmt, args...) \
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printk(KERN_DEBUG "(%s:%3.3d ua:%x): " fmt, __FILE__, __LINE__ , adapter->vdev->unit_address, ## args)
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#define ibmveth_assert(expr) \
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if(!(expr)) { \
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printk(KERN_DEBUG "assertion failed (%s:%3.3d ua:%x): %s\n", __FILE__, __LINE__, adapter->vdev->unit_address, #expr); \
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BUG(); \
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}
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#else
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#define ibmveth_debug_printk_no_adapter(fmt, args...)
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#define ibmveth_debug_printk(fmt, args...)
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#define ibmveth_assert(expr)
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#endif
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static int ibmveth_open(struct net_device *dev);
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static int ibmveth_close(struct net_device *dev);
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static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd);
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static int ibmveth_poll(struct napi_struct *napi, int budget);
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static int ibmveth_start_xmit(struct sk_buff *skb, struct net_device *dev);
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static void ibmveth_set_multicast_list(struct net_device *dev);
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static int ibmveth_change_mtu(struct net_device *dev, int new_mtu);
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static void ibmveth_proc_register_driver(void);
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static void ibmveth_proc_unregister_driver(void);
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static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter);
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static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter);
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static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
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static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter);
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static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
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static struct kobj_type ktype_veth_pool;
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#ifdef CONFIG_PROC_FS
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#define IBMVETH_PROC_DIR "ibmveth"
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static struct proc_dir_entry *ibmveth_proc_dir;
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#endif
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static const char ibmveth_driver_name[] = "ibmveth";
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static const char ibmveth_driver_string[] = "IBM i/pSeries Virtual Ethernet Driver";
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#define ibmveth_driver_version "1.03"
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MODULE_AUTHOR("Santiago Leon <santil@us.ibm.com>");
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MODULE_DESCRIPTION("IBM i/pSeries Virtual Ethernet Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(ibmveth_driver_version);
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struct ibmveth_stat {
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char name[ETH_GSTRING_LEN];
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int offset;
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};
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#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat)
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#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off))
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struct ibmveth_stat ibmveth_stats[] = {
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{ "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) },
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{ "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) },
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{ "replenish_add_buff_failure", IBMVETH_STAT_OFF(replenish_add_buff_failure) },
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{ "replenish_add_buff_success", IBMVETH_STAT_OFF(replenish_add_buff_success) },
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{ "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) },
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{ "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) },
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{ "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) },
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{ "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) },
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};
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/* simple methods of getting data from the current rxq entry */
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static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter)
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{
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return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off;
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}
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static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter)
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{
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return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> IBMVETH_RXQ_TOGGLE_SHIFT;
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}
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static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter)
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{
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return (ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle);
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}
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static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter)
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{
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return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID);
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}
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static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter)
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{
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return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK);
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}
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static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter)
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{
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return (adapter->rx_queue.queue_addr[adapter->rx_queue.index].length);
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}
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static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter)
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{
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return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD);
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}
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/* setup the initial settings for a buffer pool */
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static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, u32 pool_index, u32 pool_size, u32 buff_size, u32 pool_active)
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{
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pool->size = pool_size;
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pool->index = pool_index;
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pool->buff_size = buff_size;
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pool->threshold = pool_size / 2;
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pool->active = pool_active;
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}
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/* allocate and setup an buffer pool - called during open */
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static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool)
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{
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int i;
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pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL);
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if(!pool->free_map) {
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return -1;
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}
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pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL);
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if(!pool->dma_addr) {
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kfree(pool->free_map);
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pool->free_map = NULL;
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return -1;
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}
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pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL);
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if(!pool->skbuff) {
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kfree(pool->dma_addr);
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pool->dma_addr = NULL;
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kfree(pool->free_map);
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pool->free_map = NULL;
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return -1;
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}
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memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size);
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for(i = 0; i < pool->size; ++i) {
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pool->free_map[i] = i;
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}
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atomic_set(&pool->available, 0);
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pool->producer_index = 0;
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pool->consumer_index = 0;
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return 0;
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}
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/* replenish the buffers for a pool. note that we don't need to
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* skb_reserve these since they are used for incoming...
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*/
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static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
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{
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u32 i;
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u32 count = pool->size - atomic_read(&pool->available);
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u32 buffers_added = 0;
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struct sk_buff *skb;
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unsigned int free_index, index;
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u64 correlator;
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unsigned long lpar_rc;
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dma_addr_t dma_addr;
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mb();
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for(i = 0; i < count; ++i) {
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union ibmveth_buf_desc desc;
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skb = alloc_skb(pool->buff_size, GFP_ATOMIC);
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if(!skb) {
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ibmveth_debug_printk("replenish: unable to allocate skb\n");
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adapter->replenish_no_mem++;
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break;
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}
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free_index = pool->consumer_index;
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pool->consumer_index = (pool->consumer_index + 1) % pool->size;
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index = pool->free_map[free_index];
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ibmveth_assert(index != IBM_VETH_INVALID_MAP);
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ibmveth_assert(pool->skbuff[index] == NULL);
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dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
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pool->buff_size, DMA_FROM_DEVICE);
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if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
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goto failure;
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pool->free_map[free_index] = IBM_VETH_INVALID_MAP;
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pool->dma_addr[index] = dma_addr;
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pool->skbuff[index] = skb;
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correlator = ((u64)pool->index << 32) | index;
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*(u64*)skb->data = correlator;
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desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size;
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desc.fields.address = dma_addr;
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lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
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if (lpar_rc != H_SUCCESS)
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goto failure;
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else {
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buffers_added++;
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adapter->replenish_add_buff_success++;
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}
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}
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mb();
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atomic_add(buffers_added, &(pool->available));
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return;
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failure:
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pool->free_map[free_index] = index;
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pool->skbuff[index] = NULL;
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if (pool->consumer_index == 0)
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pool->consumer_index = pool->size - 1;
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else
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pool->consumer_index--;
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if (!dma_mapping_error(&adapter->vdev->dev, dma_addr))
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dma_unmap_single(&adapter->vdev->dev,
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pool->dma_addr[index], pool->buff_size,
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DMA_FROM_DEVICE);
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dev_kfree_skb_any(skb);
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adapter->replenish_add_buff_failure++;
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mb();
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atomic_add(buffers_added, &(pool->available));
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}
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/* replenish routine */
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static void ibmveth_replenish_task(struct ibmveth_adapter *adapter)
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{
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int i;
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adapter->replenish_task_cycles++;
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for (i = (IbmVethNumBufferPools - 1); i >= 0; i--)
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if(adapter->rx_buff_pool[i].active)
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ibmveth_replenish_buffer_pool(adapter,
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&adapter->rx_buff_pool[i]);
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adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
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}
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/* empty and free ana buffer pool - also used to do cleanup in error paths */
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static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, struct ibmveth_buff_pool *pool)
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{
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int i;
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kfree(pool->free_map);
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pool->free_map = NULL;
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if(pool->skbuff && pool->dma_addr) {
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for(i = 0; i < pool->size; ++i) {
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struct sk_buff *skb = pool->skbuff[i];
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if(skb) {
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dma_unmap_single(&adapter->vdev->dev,
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pool->dma_addr[i],
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pool->buff_size,
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DMA_FROM_DEVICE);
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dev_kfree_skb_any(skb);
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pool->skbuff[i] = NULL;
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}
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}
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}
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if(pool->dma_addr) {
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kfree(pool->dma_addr);
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pool->dma_addr = NULL;
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}
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if(pool->skbuff) {
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kfree(pool->skbuff);
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pool->skbuff = NULL;
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}
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}
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/* remove a buffer from a pool */
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static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, u64 correlator)
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{
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unsigned int pool = correlator >> 32;
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unsigned int index = correlator & 0xffffffffUL;
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unsigned int free_index;
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struct sk_buff *skb;
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ibmveth_assert(pool < IbmVethNumBufferPools);
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ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
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skb = adapter->rx_buff_pool[pool].skbuff[index];
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ibmveth_assert(skb != NULL);
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adapter->rx_buff_pool[pool].skbuff[index] = NULL;
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dma_unmap_single(&adapter->vdev->dev,
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adapter->rx_buff_pool[pool].dma_addr[index],
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adapter->rx_buff_pool[pool].buff_size,
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DMA_FROM_DEVICE);
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free_index = adapter->rx_buff_pool[pool].producer_index;
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adapter->rx_buff_pool[pool].producer_index
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= (adapter->rx_buff_pool[pool].producer_index + 1)
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% adapter->rx_buff_pool[pool].size;
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adapter->rx_buff_pool[pool].free_map[free_index] = index;
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mb();
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atomic_dec(&(adapter->rx_buff_pool[pool].available));
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}
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/* get the current buffer on the rx queue */
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static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter)
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{
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u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
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unsigned int pool = correlator >> 32;
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unsigned int index = correlator & 0xffffffffUL;
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ibmveth_assert(pool < IbmVethNumBufferPools);
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ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
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return adapter->rx_buff_pool[pool].skbuff[index];
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}
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/* recycle the current buffer on the rx queue */
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static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter)
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{
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u32 q_index = adapter->rx_queue.index;
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u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator;
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unsigned int pool = correlator >> 32;
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unsigned int index = correlator & 0xffffffffUL;
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union ibmveth_buf_desc desc;
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unsigned long lpar_rc;
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ibmveth_assert(pool < IbmVethNumBufferPools);
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ibmveth_assert(index < adapter->rx_buff_pool[pool].size);
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if(!adapter->rx_buff_pool[pool].active) {
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ibmveth_rxq_harvest_buffer(adapter);
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ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]);
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return;
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}
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desc.fields.flags_len = IBMVETH_BUF_VALID |
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adapter->rx_buff_pool[pool].buff_size;
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desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index];
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lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc);
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if(lpar_rc != H_SUCCESS) {
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ibmveth_debug_printk("h_add_logical_lan_buffer failed during recycle rc=%ld", lpar_rc);
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ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
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}
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if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
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adapter->rx_queue.index = 0;
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adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
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}
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}
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static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
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{
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ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
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if(++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
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adapter->rx_queue.index = 0;
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adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
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}
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}
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static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
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{
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int i;
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struct device *dev = &adapter->vdev->dev;
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|
|
if(adapter->buffer_list_addr != NULL) {
|
|
if (!dma_mapping_error(dev, adapter->buffer_list_dma)) {
|
|
dma_unmap_single(dev, adapter->buffer_list_dma, 4096,
|
|
DMA_BIDIRECTIONAL);
|
|
adapter->buffer_list_dma = DMA_ERROR_CODE;
|
|
}
|
|
free_page((unsigned long)adapter->buffer_list_addr);
|
|
adapter->buffer_list_addr = NULL;
|
|
}
|
|
|
|
if(adapter->filter_list_addr != NULL) {
|
|
if (!dma_mapping_error(dev, adapter->filter_list_dma)) {
|
|
dma_unmap_single(dev, adapter->filter_list_dma, 4096,
|
|
DMA_BIDIRECTIONAL);
|
|
adapter->filter_list_dma = DMA_ERROR_CODE;
|
|
}
|
|
free_page((unsigned long)adapter->filter_list_addr);
|
|
adapter->filter_list_addr = NULL;
|
|
}
|
|
|
|
if(adapter->rx_queue.queue_addr != NULL) {
|
|
if (!dma_mapping_error(dev, adapter->rx_queue.queue_dma)) {
|
|
dma_unmap_single(dev,
|
|
adapter->rx_queue.queue_dma,
|
|
adapter->rx_queue.queue_len,
|
|
DMA_BIDIRECTIONAL);
|
|
adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
|
|
}
|
|
kfree(adapter->rx_queue.queue_addr);
|
|
adapter->rx_queue.queue_addr = NULL;
|
|
}
|
|
|
|
for(i = 0; i<IbmVethNumBufferPools; i++)
|
|
if (adapter->rx_buff_pool[i].active)
|
|
ibmveth_free_buffer_pool(adapter,
|
|
&adapter->rx_buff_pool[i]);
|
|
|
|
if (adapter->bounce_buffer != NULL) {
|
|
if (!dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
|
|
dma_unmap_single(&adapter->vdev->dev,
|
|
adapter->bounce_buffer_dma,
|
|
adapter->netdev->mtu + IBMVETH_BUFF_OH,
|
|
DMA_BIDIRECTIONAL);
|
|
adapter->bounce_buffer_dma = DMA_ERROR_CODE;
|
|
}
|
|
kfree(adapter->bounce_buffer);
|
|
adapter->bounce_buffer = NULL;
|
|
}
|
|
}
|
|
|
|
static int ibmveth_register_logical_lan(struct ibmveth_adapter *adapter,
|
|
union ibmveth_buf_desc rxq_desc, u64 mac_address)
|
|
{
|
|
int rc, try_again = 1;
|
|
|
|
/* After a kexec the adapter will still be open, so our attempt to
|
|
* open it will fail. So if we get a failure we free the adapter and
|
|
* try again, but only once. */
|
|
retry:
|
|
rc = h_register_logical_lan(adapter->vdev->unit_address,
|
|
adapter->buffer_list_dma, rxq_desc.desc,
|
|
adapter->filter_list_dma, mac_address);
|
|
|
|
if (rc != H_SUCCESS && try_again) {
|
|
do {
|
|
rc = h_free_logical_lan(adapter->vdev->unit_address);
|
|
} while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
|
|
|
|
try_again = 0;
|
|
goto retry;
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int ibmveth_open(struct net_device *netdev)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
u64 mac_address = 0;
|
|
int rxq_entries = 1;
|
|
unsigned long lpar_rc;
|
|
int rc;
|
|
union ibmveth_buf_desc rxq_desc;
|
|
int i;
|
|
struct device *dev;
|
|
|
|
ibmveth_debug_printk("open starting\n");
|
|
|
|
napi_enable(&adapter->napi);
|
|
|
|
for(i = 0; i<IbmVethNumBufferPools; i++)
|
|
rxq_entries += adapter->rx_buff_pool[i].size;
|
|
|
|
adapter->buffer_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
|
|
adapter->filter_list_addr = (void*) get_zeroed_page(GFP_KERNEL);
|
|
|
|
if(!adapter->buffer_list_addr || !adapter->filter_list_addr) {
|
|
ibmveth_error_printk("unable to allocate filter or buffer list pages\n");
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * rxq_entries;
|
|
adapter->rx_queue.queue_addr = kmalloc(adapter->rx_queue.queue_len, GFP_KERNEL);
|
|
|
|
if(!adapter->rx_queue.queue_addr) {
|
|
ibmveth_error_printk("unable to allocate rx queue pages\n");
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
dev = &adapter->vdev->dev;
|
|
|
|
adapter->buffer_list_dma = dma_map_single(dev,
|
|
adapter->buffer_list_addr, 4096, DMA_BIDIRECTIONAL);
|
|
adapter->filter_list_dma = dma_map_single(dev,
|
|
adapter->filter_list_addr, 4096, DMA_BIDIRECTIONAL);
|
|
adapter->rx_queue.queue_dma = dma_map_single(dev,
|
|
adapter->rx_queue.queue_addr,
|
|
adapter->rx_queue.queue_len, DMA_BIDIRECTIONAL);
|
|
|
|
if ((dma_mapping_error(dev, adapter->buffer_list_dma)) ||
|
|
(dma_mapping_error(dev, adapter->filter_list_dma)) ||
|
|
(dma_mapping_error(dev, adapter->rx_queue.queue_dma))) {
|
|
ibmveth_error_printk("unable to map filter or buffer list pages\n");
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
adapter->rx_queue.index = 0;
|
|
adapter->rx_queue.num_slots = rxq_entries;
|
|
adapter->rx_queue.toggle = 1;
|
|
|
|
memcpy(&mac_address, netdev->dev_addr, netdev->addr_len);
|
|
mac_address = mac_address >> 16;
|
|
|
|
rxq_desc.fields.flags_len = IBMVETH_BUF_VALID | adapter->rx_queue.queue_len;
|
|
rxq_desc.fields.address = adapter->rx_queue.queue_dma;
|
|
|
|
ibmveth_debug_printk("buffer list @ 0x%p\n", adapter->buffer_list_addr);
|
|
ibmveth_debug_printk("filter list @ 0x%p\n", adapter->filter_list_addr);
|
|
ibmveth_debug_printk("receive q @ 0x%p\n", adapter->rx_queue.queue_addr);
|
|
|
|
h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
|
|
|
|
lpar_rc = ibmveth_register_logical_lan(adapter, rxq_desc, mac_address);
|
|
|
|
if(lpar_rc != H_SUCCESS) {
|
|
ibmveth_error_printk("h_register_logical_lan failed with %ld\n", lpar_rc);
|
|
ibmveth_error_printk("buffer TCE:0x%llx filter TCE:0x%llx rxq desc:0x%llx MAC:0x%llx\n",
|
|
adapter->buffer_list_dma,
|
|
adapter->filter_list_dma,
|
|
rxq_desc.desc,
|
|
mac_address);
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return -ENONET;
|
|
}
|
|
|
|
for(i = 0; i<IbmVethNumBufferPools; i++) {
|
|
if(!adapter->rx_buff_pool[i].active)
|
|
continue;
|
|
if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
|
|
ibmveth_error_printk("unable to alloc pool\n");
|
|
adapter->rx_buff_pool[i].active = 0;
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return -ENOMEM ;
|
|
}
|
|
}
|
|
|
|
ibmveth_debug_printk("registering irq 0x%x\n", netdev->irq);
|
|
if((rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name, netdev)) != 0) {
|
|
ibmveth_error_printk("unable to request irq 0x%x, rc %d\n", netdev->irq, rc);
|
|
do {
|
|
rc = h_free_logical_lan(adapter->vdev->unit_address);
|
|
} while (H_IS_LONG_BUSY(rc) || (rc == H_BUSY));
|
|
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return rc;
|
|
}
|
|
|
|
adapter->bounce_buffer =
|
|
kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
|
|
if (!adapter->bounce_buffer) {
|
|
ibmveth_error_printk("unable to allocate bounce buffer\n");
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return -ENOMEM;
|
|
}
|
|
adapter->bounce_buffer_dma =
|
|
dma_map_single(&adapter->vdev->dev, adapter->bounce_buffer,
|
|
netdev->mtu + IBMVETH_BUFF_OH, DMA_BIDIRECTIONAL);
|
|
if (dma_mapping_error(dev, adapter->bounce_buffer_dma)) {
|
|
ibmveth_error_printk("unable to map bounce buffer\n");
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ibmveth_debug_printk("initial replenish cycle\n");
|
|
ibmveth_interrupt(netdev->irq, netdev);
|
|
|
|
netif_start_queue(netdev);
|
|
|
|
ibmveth_debug_printk("open complete\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ibmveth_close(struct net_device *netdev)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
long lpar_rc;
|
|
|
|
ibmveth_debug_printk("close starting\n");
|
|
|
|
napi_disable(&adapter->napi);
|
|
|
|
if (!adapter->pool_config)
|
|
netif_stop_queue(netdev);
|
|
|
|
free_irq(netdev->irq, netdev);
|
|
|
|
do {
|
|
lpar_rc = h_free_logical_lan(adapter->vdev->unit_address);
|
|
} while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY));
|
|
|
|
if(lpar_rc != H_SUCCESS)
|
|
{
|
|
ibmveth_error_printk("h_free_logical_lan failed with %lx, continuing with close\n",
|
|
lpar_rc);
|
|
}
|
|
|
|
adapter->rx_no_buffer = *(u64*)(((char*)adapter->buffer_list_addr) + 4096 - 8);
|
|
|
|
ibmveth_cleanup(adapter);
|
|
|
|
ibmveth_debug_printk("close complete\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int netdev_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) {
|
|
cmd->supported = (SUPPORTED_1000baseT_Full | SUPPORTED_Autoneg | SUPPORTED_FIBRE);
|
|
cmd->advertising = (ADVERTISED_1000baseT_Full | ADVERTISED_Autoneg | ADVERTISED_FIBRE);
|
|
cmd->speed = SPEED_1000;
|
|
cmd->duplex = DUPLEX_FULL;
|
|
cmd->port = PORT_FIBRE;
|
|
cmd->phy_address = 0;
|
|
cmd->transceiver = XCVR_INTERNAL;
|
|
cmd->autoneg = AUTONEG_ENABLE;
|
|
cmd->maxtxpkt = 0;
|
|
cmd->maxrxpkt = 1;
|
|
return 0;
|
|
}
|
|
|
|
static void netdev_get_drvinfo (struct net_device *dev, struct ethtool_drvinfo *info) {
|
|
strncpy(info->driver, ibmveth_driver_name, sizeof(info->driver) - 1);
|
|
strncpy(info->version, ibmveth_driver_version, sizeof(info->version) - 1);
|
|
}
|
|
|
|
static u32 netdev_get_link(struct net_device *dev) {
|
|
return 1;
|
|
}
|
|
|
|
static void ibmveth_set_rx_csum_flags(struct net_device *dev, u32 data)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
|
|
if (data)
|
|
adapter->rx_csum = 1;
|
|
else {
|
|
/*
|
|
* Since the ibmveth firmware interface does not have the concept of
|
|
* separate tx/rx checksum offload enable, if rx checksum is disabled
|
|
* we also have to disable tx checksum offload. Once we disable rx
|
|
* checksum offload, we are no longer allowed to send tx buffers that
|
|
* are not properly checksummed.
|
|
*/
|
|
adapter->rx_csum = 0;
|
|
dev->features &= ~NETIF_F_IP_CSUM;
|
|
}
|
|
}
|
|
|
|
static void ibmveth_set_tx_csum_flags(struct net_device *dev, u32 data)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
|
|
if (data) {
|
|
dev->features |= NETIF_F_IP_CSUM;
|
|
adapter->rx_csum = 1;
|
|
} else
|
|
dev->features &= ~NETIF_F_IP_CSUM;
|
|
}
|
|
|
|
static int ibmveth_set_csum_offload(struct net_device *dev, u32 data,
|
|
void (*done) (struct net_device *, u32))
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
unsigned long set_attr, clr_attr, ret_attr;
|
|
long ret;
|
|
int rc1 = 0, rc2 = 0;
|
|
int restart = 0;
|
|
|
|
if (netif_running(dev)) {
|
|
restart = 1;
|
|
adapter->pool_config = 1;
|
|
ibmveth_close(dev);
|
|
adapter->pool_config = 0;
|
|
}
|
|
|
|
set_attr = 0;
|
|
clr_attr = 0;
|
|
|
|
if (data)
|
|
set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
|
|
else
|
|
clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
|
|
|
|
ret = h_illan_attributes(adapter->vdev->unit_address, 0, 0, &ret_attr);
|
|
|
|
if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
|
|
!(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
|
|
(ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
|
|
ret = h_illan_attributes(adapter->vdev->unit_address, clr_attr,
|
|
set_attr, &ret_attr);
|
|
|
|
if (ret != H_SUCCESS) {
|
|
rc1 = -EIO;
|
|
ibmveth_error_printk("unable to change checksum offload settings."
|
|
" %d rc=%ld\n", data, ret);
|
|
|
|
ret = h_illan_attributes(adapter->vdev->unit_address,
|
|
set_attr, clr_attr, &ret_attr);
|
|
} else
|
|
done(dev, data);
|
|
} else {
|
|
rc1 = -EIO;
|
|
ibmveth_error_printk("unable to change checksum offload settings."
|
|
" %d rc=%ld ret_attr=%lx\n", data, ret, ret_attr);
|
|
}
|
|
|
|
if (restart)
|
|
rc2 = ibmveth_open(dev);
|
|
|
|
return rc1 ? rc1 : rc2;
|
|
}
|
|
|
|
static int ibmveth_set_rx_csum(struct net_device *dev, u32 data)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
|
|
if ((data && adapter->rx_csum) || (!data && !adapter->rx_csum))
|
|
return 0;
|
|
|
|
return ibmveth_set_csum_offload(dev, data, ibmveth_set_rx_csum_flags);
|
|
}
|
|
|
|
static int ibmveth_set_tx_csum(struct net_device *dev, u32 data)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
int rc = 0;
|
|
|
|
if (data && (dev->features & NETIF_F_IP_CSUM))
|
|
return 0;
|
|
if (!data && !(dev->features & NETIF_F_IP_CSUM))
|
|
return 0;
|
|
|
|
if (data && !adapter->rx_csum)
|
|
rc = ibmveth_set_csum_offload(dev, data, ibmveth_set_tx_csum_flags);
|
|
else
|
|
ibmveth_set_tx_csum_flags(dev, data);
|
|
|
|
return rc;
|
|
}
|
|
|
|
static u32 ibmveth_get_rx_csum(struct net_device *dev)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
return adapter->rx_csum;
|
|
}
|
|
|
|
static void ibmveth_get_strings(struct net_device *dev, u32 stringset, u8 *data)
|
|
{
|
|
int i;
|
|
|
|
if (stringset != ETH_SS_STATS)
|
|
return;
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++, data += ETH_GSTRING_LEN)
|
|
memcpy(data, ibmveth_stats[i].name, ETH_GSTRING_LEN);
|
|
}
|
|
|
|
static int ibmveth_get_sset_count(struct net_device *dev, int sset)
|
|
{
|
|
switch (sset) {
|
|
case ETH_SS_STATS:
|
|
return ARRAY_SIZE(ibmveth_stats);
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
}
|
|
|
|
static void ibmveth_get_ethtool_stats(struct net_device *dev,
|
|
struct ethtool_stats *stats, u64 *data)
|
|
{
|
|
int i;
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
|
|
for (i = 0; i < ARRAY_SIZE(ibmveth_stats); i++)
|
|
data[i] = IBMVETH_GET_STAT(adapter, ibmveth_stats[i].offset);
|
|
}
|
|
|
|
static const struct ethtool_ops netdev_ethtool_ops = {
|
|
.get_drvinfo = netdev_get_drvinfo,
|
|
.get_settings = netdev_get_settings,
|
|
.get_link = netdev_get_link,
|
|
.set_tx_csum = ibmveth_set_tx_csum,
|
|
.get_rx_csum = ibmveth_get_rx_csum,
|
|
.set_rx_csum = ibmveth_set_rx_csum,
|
|
.get_strings = ibmveth_get_strings,
|
|
.get_sset_count = ibmveth_get_sset_count,
|
|
.get_ethtool_stats = ibmveth_get_ethtool_stats,
|
|
};
|
|
|
|
static int ibmveth_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
|
|
{
|
|
return -EOPNOTSUPP;
|
|
}
|
|
|
|
#define page_offset(v) ((unsigned long)(v) & ((1 << 12) - 1))
|
|
|
|
static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
|
|
struct net_device *netdev)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
union ibmveth_buf_desc desc;
|
|
unsigned long lpar_rc;
|
|
unsigned long correlator;
|
|
unsigned long flags;
|
|
unsigned int retry_count;
|
|
unsigned int tx_dropped = 0;
|
|
unsigned int tx_bytes = 0;
|
|
unsigned int tx_packets = 0;
|
|
unsigned int tx_send_failed = 0;
|
|
unsigned int tx_map_failed = 0;
|
|
int used_bounce = 0;
|
|
unsigned long data_dma_addr;
|
|
|
|
desc.fields.flags_len = IBMVETH_BUF_VALID | skb->len;
|
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL &&
|
|
ip_hdr(skb)->protocol != IPPROTO_TCP && skb_checksum_help(skb)) {
|
|
ibmveth_error_printk("tx: failed to checksum packet\n");
|
|
tx_dropped++;
|
|
goto out;
|
|
}
|
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
unsigned char *buf = skb_transport_header(skb) + skb->csum_offset;
|
|
|
|
desc.fields.flags_len |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
|
|
|
|
/* Need to zero out the checksum */
|
|
buf[0] = 0;
|
|
buf[1] = 0;
|
|
}
|
|
|
|
data_dma_addr = dma_map_single(&adapter->vdev->dev, skb->data,
|
|
skb->len, DMA_TO_DEVICE);
|
|
if (dma_mapping_error(&adapter->vdev->dev, data_dma_addr)) {
|
|
if (!firmware_has_feature(FW_FEATURE_CMO))
|
|
ibmveth_error_printk("tx: unable to map xmit buffer\n");
|
|
skb_copy_from_linear_data(skb, adapter->bounce_buffer,
|
|
skb->len);
|
|
desc.fields.address = adapter->bounce_buffer_dma;
|
|
tx_map_failed++;
|
|
used_bounce = 1;
|
|
wmb();
|
|
} else
|
|
desc.fields.address = data_dma_addr;
|
|
|
|
/* send the frame. Arbitrarily set retrycount to 1024 */
|
|
correlator = 0;
|
|
retry_count = 1024;
|
|
do {
|
|
lpar_rc = h_send_logical_lan(adapter->vdev->unit_address,
|
|
desc.desc, 0, 0, 0, 0, 0,
|
|
correlator, &correlator);
|
|
} while ((lpar_rc == H_BUSY) && (retry_count--));
|
|
|
|
if(lpar_rc != H_SUCCESS && lpar_rc != H_DROPPED) {
|
|
ibmveth_error_printk("tx: h_send_logical_lan failed with rc=%ld\n", lpar_rc);
|
|
ibmveth_error_printk("tx: valid=%d, len=%d, address=0x%08x\n",
|
|
(desc.fields.flags_len & IBMVETH_BUF_VALID) ? 1 : 0,
|
|
skb->len, desc.fields.address);
|
|
tx_send_failed++;
|
|
tx_dropped++;
|
|
} else {
|
|
tx_packets++;
|
|
tx_bytes += skb->len;
|
|
netdev->trans_start = jiffies; /* NETIF_F_LLTX driver :( */
|
|
}
|
|
|
|
if (!used_bounce)
|
|
dma_unmap_single(&adapter->vdev->dev, data_dma_addr,
|
|
skb->len, DMA_TO_DEVICE);
|
|
|
|
out: spin_lock_irqsave(&adapter->stats_lock, flags);
|
|
netdev->stats.tx_dropped += tx_dropped;
|
|
netdev->stats.tx_bytes += tx_bytes;
|
|
netdev->stats.tx_packets += tx_packets;
|
|
adapter->tx_send_failed += tx_send_failed;
|
|
adapter->tx_map_failed += tx_map_failed;
|
|
spin_unlock_irqrestore(&adapter->stats_lock, flags);
|
|
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
}
|
|
|
|
static int ibmveth_poll(struct napi_struct *napi, int budget)
|
|
{
|
|
struct ibmveth_adapter *adapter = container_of(napi, struct ibmveth_adapter, napi);
|
|
struct net_device *netdev = adapter->netdev;
|
|
int frames_processed = 0;
|
|
unsigned long lpar_rc;
|
|
|
|
restart_poll:
|
|
do {
|
|
struct sk_buff *skb;
|
|
|
|
if (!ibmveth_rxq_pending_buffer(adapter))
|
|
break;
|
|
|
|
rmb();
|
|
if (!ibmveth_rxq_buffer_valid(adapter)) {
|
|
wmb(); /* suggested by larson1 */
|
|
adapter->rx_invalid_buffer++;
|
|
ibmveth_debug_printk("recycling invalid buffer\n");
|
|
ibmveth_rxq_recycle_buffer(adapter);
|
|
} else {
|
|
int length = ibmveth_rxq_frame_length(adapter);
|
|
int offset = ibmveth_rxq_frame_offset(adapter);
|
|
int csum_good = ibmveth_rxq_csum_good(adapter);
|
|
|
|
skb = ibmveth_rxq_get_buffer(adapter);
|
|
if (csum_good)
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
ibmveth_rxq_harvest_buffer(adapter);
|
|
|
|
skb_reserve(skb, offset);
|
|
skb_put(skb, length);
|
|
skb->protocol = eth_type_trans(skb, netdev);
|
|
|
|
netif_receive_skb(skb); /* send it up */
|
|
|
|
netdev->stats.rx_packets++;
|
|
netdev->stats.rx_bytes += length;
|
|
frames_processed++;
|
|
}
|
|
} while (frames_processed < budget);
|
|
|
|
ibmveth_replenish_task(adapter);
|
|
|
|
if (frames_processed < budget) {
|
|
/* We think we are done - reenable interrupts,
|
|
* then check once more to make sure we are done.
|
|
*/
|
|
lpar_rc = h_vio_signal(adapter->vdev->unit_address,
|
|
VIO_IRQ_ENABLE);
|
|
|
|
ibmveth_assert(lpar_rc == H_SUCCESS);
|
|
|
|
napi_complete(napi);
|
|
|
|
if (ibmveth_rxq_pending_buffer(adapter) &&
|
|
napi_reschedule(napi)) {
|
|
lpar_rc = h_vio_signal(adapter->vdev->unit_address,
|
|
VIO_IRQ_DISABLE);
|
|
goto restart_poll;
|
|
}
|
|
}
|
|
|
|
return frames_processed;
|
|
}
|
|
|
|
static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
|
|
{
|
|
struct net_device *netdev = dev_instance;
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
unsigned long lpar_rc;
|
|
|
|
if (napi_schedule_prep(&adapter->napi)) {
|
|
lpar_rc = h_vio_signal(adapter->vdev->unit_address,
|
|
VIO_IRQ_DISABLE);
|
|
ibmveth_assert(lpar_rc == H_SUCCESS);
|
|
__napi_schedule(&adapter->napi);
|
|
}
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static void ibmveth_set_multicast_list(struct net_device *netdev)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
unsigned long lpar_rc;
|
|
|
|
if ((netdev->flags & IFF_PROMISC) ||
|
|
(netdev_mc_count(netdev) > adapter->mcastFilterSize)) {
|
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
|
IbmVethMcastEnableRecv |
|
|
IbmVethMcastDisableFiltering,
|
|
0);
|
|
if(lpar_rc != H_SUCCESS) {
|
|
ibmveth_error_printk("h_multicast_ctrl rc=%ld when entering promisc mode\n", lpar_rc);
|
|
}
|
|
} else {
|
|
struct netdev_hw_addr *ha;
|
|
/* clear the filter table & disable filtering */
|
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
|
IbmVethMcastEnableRecv |
|
|
IbmVethMcastDisableFiltering |
|
|
IbmVethMcastClearFilterTable,
|
|
0);
|
|
if(lpar_rc != H_SUCCESS) {
|
|
ibmveth_error_printk("h_multicast_ctrl rc=%ld when attempting to clear filter table\n", lpar_rc);
|
|
}
|
|
/* add the addresses to the filter table */
|
|
netdev_for_each_mc_addr(ha, netdev) {
|
|
// add the multicast address to the filter table
|
|
unsigned long mcast_addr = 0;
|
|
memcpy(((char *)&mcast_addr)+2, ha->addr, 6);
|
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
|
IbmVethMcastAddFilter,
|
|
mcast_addr);
|
|
if(lpar_rc != H_SUCCESS) {
|
|
ibmveth_error_printk("h_multicast_ctrl rc=%ld when adding an entry to the filter table\n", lpar_rc);
|
|
}
|
|
}
|
|
|
|
/* re-enable filtering */
|
|
lpar_rc = h_multicast_ctrl(adapter->vdev->unit_address,
|
|
IbmVethMcastEnableFiltering,
|
|
0);
|
|
if(lpar_rc != H_SUCCESS) {
|
|
ibmveth_error_printk("h_multicast_ctrl rc=%ld when enabling filtering\n", lpar_rc);
|
|
}
|
|
}
|
|
}
|
|
|
|
static int ibmveth_change_mtu(struct net_device *dev, int new_mtu)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
struct vio_dev *viodev = adapter->vdev;
|
|
int new_mtu_oh = new_mtu + IBMVETH_BUFF_OH;
|
|
int i;
|
|
|
|
if (new_mtu < IBMVETH_MAX_MTU)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < IbmVethNumBufferPools; i++)
|
|
if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
|
|
break;
|
|
|
|
if (i == IbmVethNumBufferPools)
|
|
return -EINVAL;
|
|
|
|
/* Deactivate all the buffer pools so that the next loop can activate
|
|
only the buffer pools necessary to hold the new MTU */
|
|
for (i = 0; i < IbmVethNumBufferPools; i++)
|
|
if (adapter->rx_buff_pool[i].active) {
|
|
ibmveth_free_buffer_pool(adapter,
|
|
&adapter->rx_buff_pool[i]);
|
|
adapter->rx_buff_pool[i].active = 0;
|
|
}
|
|
|
|
/* Look for an active buffer pool that can hold the new MTU */
|
|
for(i = 0; i<IbmVethNumBufferPools; i++) {
|
|
adapter->rx_buff_pool[i].active = 1;
|
|
|
|
if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
|
|
if (netif_running(adapter->netdev)) {
|
|
adapter->pool_config = 1;
|
|
ibmveth_close(adapter->netdev);
|
|
adapter->pool_config = 0;
|
|
dev->mtu = new_mtu;
|
|
vio_cmo_set_dev_desired(viodev,
|
|
ibmveth_get_desired_dma
|
|
(viodev));
|
|
return ibmveth_open(adapter->netdev);
|
|
}
|
|
dev->mtu = new_mtu;
|
|
vio_cmo_set_dev_desired(viodev,
|
|
ibmveth_get_desired_dma
|
|
(viodev));
|
|
return 0;
|
|
}
|
|
}
|
|
return -EINVAL;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static void ibmveth_poll_controller(struct net_device *dev)
|
|
{
|
|
ibmveth_replenish_task(netdev_priv(dev));
|
|
ibmveth_interrupt(dev->irq, dev);
|
|
}
|
|
#endif
|
|
|
|
/**
|
|
* ibmveth_get_desired_dma - Calculate IO memory desired by the driver
|
|
*
|
|
* @vdev: struct vio_dev for the device whose desired IO mem is to be returned
|
|
*
|
|
* Return value:
|
|
* Number of bytes of IO data the driver will need to perform well.
|
|
*/
|
|
static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev)
|
|
{
|
|
struct net_device *netdev = dev_get_drvdata(&vdev->dev);
|
|
struct ibmveth_adapter *adapter;
|
|
unsigned long ret;
|
|
int i;
|
|
int rxqentries = 1;
|
|
|
|
/* netdev inits at probe time along with the structures we need below*/
|
|
if (netdev == NULL)
|
|
return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT);
|
|
|
|
adapter = netdev_priv(netdev);
|
|
|
|
ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE;
|
|
ret += IOMMU_PAGE_ALIGN(netdev->mtu);
|
|
|
|
for (i = 0; i < IbmVethNumBufferPools; i++) {
|
|
/* add the size of the active receive buffers */
|
|
if (adapter->rx_buff_pool[i].active)
|
|
ret +=
|
|
adapter->rx_buff_pool[i].size *
|
|
IOMMU_PAGE_ALIGN(adapter->rx_buff_pool[i].
|
|
buff_size);
|
|
rxqentries += adapter->rx_buff_pool[i].size;
|
|
}
|
|
/* add the size of the receive queue entries */
|
|
ret += IOMMU_PAGE_ALIGN(rxqentries * sizeof(struct ibmveth_rx_q_entry));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static const struct net_device_ops ibmveth_netdev_ops = {
|
|
.ndo_open = ibmveth_open,
|
|
.ndo_stop = ibmveth_close,
|
|
.ndo_start_xmit = ibmveth_start_xmit,
|
|
.ndo_set_multicast_list = ibmveth_set_multicast_list,
|
|
.ndo_do_ioctl = ibmveth_ioctl,
|
|
.ndo_change_mtu = ibmveth_change_mtu,
|
|
.ndo_validate_addr = eth_validate_addr,
|
|
.ndo_set_mac_address = eth_mac_addr,
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
.ndo_poll_controller = ibmveth_poll_controller,
|
|
#endif
|
|
};
|
|
|
|
static int __devinit ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
|
|
{
|
|
int rc, i;
|
|
long ret;
|
|
struct net_device *netdev;
|
|
struct ibmveth_adapter *adapter;
|
|
unsigned long set_attr, ret_attr;
|
|
|
|
unsigned char *mac_addr_p;
|
|
unsigned int *mcastFilterSize_p;
|
|
|
|
|
|
ibmveth_debug_printk_no_adapter("entering ibmveth_probe for UA 0x%x\n",
|
|
dev->unit_address);
|
|
|
|
mac_addr_p = (unsigned char *) vio_get_attribute(dev,
|
|
VETH_MAC_ADDR, NULL);
|
|
if(!mac_addr_p) {
|
|
printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find VETH_MAC_ADDR "
|
|
"attribute\n", __FILE__, __LINE__);
|
|
return 0;
|
|
}
|
|
|
|
mcastFilterSize_p = (unsigned int *) vio_get_attribute(dev,
|
|
VETH_MCAST_FILTER_SIZE, NULL);
|
|
if(!mcastFilterSize_p) {
|
|
printk(KERN_ERR "(%s:%3.3d) ERROR: Can't find "
|
|
"VETH_MCAST_FILTER_SIZE attribute\n",
|
|
__FILE__, __LINE__);
|
|
return 0;
|
|
}
|
|
|
|
netdev = alloc_etherdev(sizeof(struct ibmveth_adapter));
|
|
|
|
if(!netdev)
|
|
return -ENOMEM;
|
|
|
|
adapter = netdev_priv(netdev);
|
|
dev_set_drvdata(&dev->dev, netdev);
|
|
|
|
adapter->vdev = dev;
|
|
adapter->netdev = netdev;
|
|
adapter->mcastFilterSize= *mcastFilterSize_p;
|
|
adapter->pool_config = 0;
|
|
|
|
netif_napi_add(netdev, &adapter->napi, ibmveth_poll, 16);
|
|
|
|
/* Some older boxes running PHYP non-natively have an OF that
|
|
returns a 8-byte local-mac-address field (and the first
|
|
2 bytes have to be ignored) while newer boxes' OF return
|
|
a 6-byte field. Note that IEEE 1275 specifies that
|
|
local-mac-address must be a 6-byte field.
|
|
The RPA doc specifies that the first byte must be 10b, so
|
|
we'll just look for it to solve this 8 vs. 6 byte field issue */
|
|
|
|
if ((*mac_addr_p & 0x3) != 0x02)
|
|
mac_addr_p += 2;
|
|
|
|
adapter->mac_addr = 0;
|
|
memcpy(&adapter->mac_addr, mac_addr_p, 6);
|
|
|
|
netdev->irq = dev->irq;
|
|
netdev->netdev_ops = &ibmveth_netdev_ops;
|
|
netdev->ethtool_ops = &netdev_ethtool_ops;
|
|
SET_NETDEV_DEV(netdev, &dev->dev);
|
|
netdev->features |= NETIF_F_LLTX;
|
|
spin_lock_init(&adapter->stats_lock);
|
|
|
|
memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
|
|
|
|
for(i = 0; i<IbmVethNumBufferPools; i++) {
|
|
struct kobject *kobj = &adapter->rx_buff_pool[i].kobj;
|
|
int error;
|
|
|
|
ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
|
|
pool_count[i], pool_size[i],
|
|
pool_active[i]);
|
|
error = kobject_init_and_add(kobj, &ktype_veth_pool,
|
|
&dev->dev.kobj, "pool%d", i);
|
|
if (!error)
|
|
kobject_uevent(kobj, KOBJ_ADD);
|
|
}
|
|
|
|
ibmveth_debug_printk("adapter @ 0x%p\n", adapter);
|
|
|
|
adapter->buffer_list_dma = DMA_ERROR_CODE;
|
|
adapter->filter_list_dma = DMA_ERROR_CODE;
|
|
adapter->rx_queue.queue_dma = DMA_ERROR_CODE;
|
|
|
|
ibmveth_debug_printk("registering netdev...\n");
|
|
|
|
ret = h_illan_attributes(dev->unit_address, 0, 0, &ret_attr);
|
|
|
|
if (ret == H_SUCCESS && !(ret_attr & IBMVETH_ILLAN_ACTIVE_TRUNK) &&
|
|
!(ret_attr & IBMVETH_ILLAN_TRUNK_PRI_MASK) &&
|
|
(ret_attr & IBMVETH_ILLAN_PADDED_PKT_CSUM)) {
|
|
set_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
|
|
|
|
ret = h_illan_attributes(dev->unit_address, 0, set_attr, &ret_attr);
|
|
|
|
if (ret == H_SUCCESS) {
|
|
adapter->rx_csum = 1;
|
|
netdev->features |= NETIF_F_IP_CSUM;
|
|
} else
|
|
ret = h_illan_attributes(dev->unit_address, set_attr, 0, &ret_attr);
|
|
}
|
|
|
|
rc = register_netdev(netdev);
|
|
|
|
if(rc) {
|
|
ibmveth_debug_printk("failed to register netdev rc=%d\n", rc);
|
|
free_netdev(netdev);
|
|
return rc;
|
|
}
|
|
|
|
ibmveth_debug_printk("registered\n");
|
|
|
|
ibmveth_proc_register_adapter(adapter);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int __devexit ibmveth_remove(struct vio_dev *dev)
|
|
{
|
|
struct net_device *netdev = dev_get_drvdata(&dev->dev);
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
int i;
|
|
|
|
for(i = 0; i<IbmVethNumBufferPools; i++)
|
|
kobject_put(&adapter->rx_buff_pool[i].kobj);
|
|
|
|
unregister_netdev(netdev);
|
|
|
|
ibmveth_proc_unregister_adapter(adapter);
|
|
|
|
free_netdev(netdev);
|
|
dev_set_drvdata(&dev->dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
static void ibmveth_proc_register_driver(void)
|
|
{
|
|
ibmveth_proc_dir = proc_mkdir(IBMVETH_PROC_DIR, init_net.proc_net);
|
|
if (ibmveth_proc_dir) {
|
|
}
|
|
}
|
|
|
|
static void ibmveth_proc_unregister_driver(void)
|
|
{
|
|
remove_proc_entry(IBMVETH_PROC_DIR, init_net.proc_net);
|
|
}
|
|
|
|
static int ibmveth_show(struct seq_file *seq, void *v)
|
|
{
|
|
struct ibmveth_adapter *adapter = seq->private;
|
|
char *current_mac = (char *) adapter->netdev->dev_addr;
|
|
char *firmware_mac = (char *) &adapter->mac_addr;
|
|
|
|
seq_printf(seq, "%s %s\n\n", ibmveth_driver_string, ibmveth_driver_version);
|
|
|
|
seq_printf(seq, "Unit Address: 0x%x\n", adapter->vdev->unit_address);
|
|
seq_printf(seq, "Current MAC: %pM\n", current_mac);
|
|
seq_printf(seq, "Firmware MAC: %pM\n", firmware_mac);
|
|
|
|
seq_printf(seq, "\nAdapter Statistics:\n");
|
|
seq_printf(seq, " TX: vio_map_single failres: %lld\n", adapter->tx_map_failed);
|
|
seq_printf(seq, " send failures: %lld\n", adapter->tx_send_failed);
|
|
seq_printf(seq, " RX: replenish task cycles: %lld\n", adapter->replenish_task_cycles);
|
|
seq_printf(seq, " alloc_skb_failures: %lld\n", adapter->replenish_no_mem);
|
|
seq_printf(seq, " add buffer failures: %lld\n", adapter->replenish_add_buff_failure);
|
|
seq_printf(seq, " invalid buffers: %lld\n", adapter->rx_invalid_buffer);
|
|
seq_printf(seq, " no buffers: %lld\n", adapter->rx_no_buffer);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int ibmveth_proc_open(struct inode *inode, struct file *file)
|
|
{
|
|
return single_open(file, ibmveth_show, PDE(inode)->data);
|
|
}
|
|
|
|
static const struct file_operations ibmveth_proc_fops = {
|
|
.owner = THIS_MODULE,
|
|
.open = ibmveth_proc_open,
|
|
.read = seq_read,
|
|
.llseek = seq_lseek,
|
|
.release = single_release,
|
|
};
|
|
|
|
static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
|
|
{
|
|
struct proc_dir_entry *entry;
|
|
if (ibmveth_proc_dir) {
|
|
char u_addr[10];
|
|
sprintf(u_addr, "%x", adapter->vdev->unit_address);
|
|
entry = proc_create_data(u_addr, S_IFREG, ibmveth_proc_dir,
|
|
&ibmveth_proc_fops, adapter);
|
|
if (!entry)
|
|
ibmveth_error_printk("Cannot create adapter proc entry");
|
|
}
|
|
}
|
|
|
|
static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
|
|
{
|
|
if (ibmveth_proc_dir) {
|
|
char u_addr[10];
|
|
sprintf(u_addr, "%x", adapter->vdev->unit_address);
|
|
remove_proc_entry(u_addr, ibmveth_proc_dir);
|
|
}
|
|
}
|
|
|
|
#else /* CONFIG_PROC_FS */
|
|
static void ibmveth_proc_register_adapter(struct ibmveth_adapter *adapter)
|
|
{
|
|
}
|
|
|
|
static void ibmveth_proc_unregister_adapter(struct ibmveth_adapter *adapter)
|
|
{
|
|
}
|
|
static void ibmveth_proc_register_driver(void)
|
|
{
|
|
}
|
|
|
|
static void ibmveth_proc_unregister_driver(void)
|
|
{
|
|
}
|
|
#endif /* CONFIG_PROC_FS */
|
|
|
|
static struct attribute veth_active_attr;
|
|
static struct attribute veth_num_attr;
|
|
static struct attribute veth_size_attr;
|
|
|
|
static ssize_t veth_pool_show(struct kobject * kobj,
|
|
struct attribute * attr, char * buf)
|
|
{
|
|
struct ibmveth_buff_pool *pool = container_of(kobj,
|
|
struct ibmveth_buff_pool,
|
|
kobj);
|
|
|
|
if (attr == &veth_active_attr)
|
|
return sprintf(buf, "%d\n", pool->active);
|
|
else if (attr == &veth_num_attr)
|
|
return sprintf(buf, "%d\n", pool->size);
|
|
else if (attr == &veth_size_attr)
|
|
return sprintf(buf, "%d\n", pool->buff_size);
|
|
return 0;
|
|
}
|
|
|
|
static ssize_t veth_pool_store(struct kobject * kobj, struct attribute * attr,
|
|
const char * buf, size_t count)
|
|
{
|
|
struct ibmveth_buff_pool *pool = container_of(kobj,
|
|
struct ibmveth_buff_pool,
|
|
kobj);
|
|
struct net_device *netdev = dev_get_drvdata(
|
|
container_of(kobj->parent, struct device, kobj));
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
long value = simple_strtol(buf, NULL, 10);
|
|
long rc;
|
|
|
|
if (attr == &veth_active_attr) {
|
|
if (value && !pool->active) {
|
|
if (netif_running(netdev)) {
|
|
if(ibmveth_alloc_buffer_pool(pool)) {
|
|
ibmveth_error_printk("unable to alloc pool\n");
|
|
return -ENOMEM;
|
|
}
|
|
pool->active = 1;
|
|
adapter->pool_config = 1;
|
|
ibmveth_close(netdev);
|
|
adapter->pool_config = 0;
|
|
if ((rc = ibmveth_open(netdev)))
|
|
return rc;
|
|
} else
|
|
pool->active = 1;
|
|
} else if (!value && pool->active) {
|
|
int mtu = netdev->mtu + IBMVETH_BUFF_OH;
|
|
int i;
|
|
/* Make sure there is a buffer pool with buffers that
|
|
can hold a packet of the size of the MTU */
|
|
for (i = 0; i < IbmVethNumBufferPools; i++) {
|
|
if (pool == &adapter->rx_buff_pool[i])
|
|
continue;
|
|
if (!adapter->rx_buff_pool[i].active)
|
|
continue;
|
|
if (mtu <= adapter->rx_buff_pool[i].buff_size)
|
|
break;
|
|
}
|
|
|
|
if (i == IbmVethNumBufferPools) {
|
|
ibmveth_error_printk("no active pool >= MTU\n");
|
|
return -EPERM;
|
|
}
|
|
|
|
if (netif_running(netdev)) {
|
|
adapter->pool_config = 1;
|
|
ibmveth_close(netdev);
|
|
pool->active = 0;
|
|
adapter->pool_config = 0;
|
|
if ((rc = ibmveth_open(netdev)))
|
|
return rc;
|
|
}
|
|
pool->active = 0;
|
|
}
|
|
} else if (attr == &veth_num_attr) {
|
|
if (value <= 0 || value > IBMVETH_MAX_POOL_COUNT)
|
|
return -EINVAL;
|
|
else {
|
|
if (netif_running(netdev)) {
|
|
adapter->pool_config = 1;
|
|
ibmveth_close(netdev);
|
|
adapter->pool_config = 0;
|
|
pool->size = value;
|
|
if ((rc = ibmveth_open(netdev)))
|
|
return rc;
|
|
} else
|
|
pool->size = value;
|
|
}
|
|
} else if (attr == &veth_size_attr) {
|
|
if (value <= IBMVETH_BUFF_OH || value > IBMVETH_MAX_BUF_SIZE)
|
|
return -EINVAL;
|
|
else {
|
|
if (netif_running(netdev)) {
|
|
adapter->pool_config = 1;
|
|
ibmveth_close(netdev);
|
|
adapter->pool_config = 0;
|
|
pool->buff_size = value;
|
|
if ((rc = ibmveth_open(netdev)))
|
|
return rc;
|
|
} else
|
|
pool->buff_size = value;
|
|
}
|
|
}
|
|
|
|
/* kick the interrupt handler to allocate/deallocate pools */
|
|
ibmveth_interrupt(netdev->irq, netdev);
|
|
return count;
|
|
}
|
|
|
|
|
|
#define ATTR(_name, _mode) \
|
|
struct attribute veth_##_name##_attr = { \
|
|
.name = __stringify(_name), .mode = _mode, \
|
|
};
|
|
|
|
static ATTR(active, 0644);
|
|
static ATTR(num, 0644);
|
|
static ATTR(size, 0644);
|
|
|
|
static struct attribute * veth_pool_attrs[] = {
|
|
&veth_active_attr,
|
|
&veth_num_attr,
|
|
&veth_size_attr,
|
|
NULL,
|
|
};
|
|
|
|
static const struct sysfs_ops veth_pool_ops = {
|
|
.show = veth_pool_show,
|
|
.store = veth_pool_store,
|
|
};
|
|
|
|
static struct kobj_type ktype_veth_pool = {
|
|
.release = NULL,
|
|
.sysfs_ops = &veth_pool_ops,
|
|
.default_attrs = veth_pool_attrs,
|
|
};
|
|
|
|
static int ibmveth_resume(struct device *dev)
|
|
{
|
|
struct net_device *netdev = dev_get_drvdata(dev);
|
|
ibmveth_interrupt(netdev->irq, netdev);
|
|
return 0;
|
|
}
|
|
|
|
static struct vio_device_id ibmveth_device_table[] __devinitdata= {
|
|
{ "network", "IBM,l-lan"},
|
|
{ "", "" }
|
|
};
|
|
MODULE_DEVICE_TABLE(vio, ibmveth_device_table);
|
|
|
|
static struct dev_pm_ops ibmveth_pm_ops = {
|
|
.resume = ibmveth_resume
|
|
};
|
|
|
|
static struct vio_driver ibmveth_driver = {
|
|
.id_table = ibmveth_device_table,
|
|
.probe = ibmveth_probe,
|
|
.remove = ibmveth_remove,
|
|
.get_desired_dma = ibmveth_get_desired_dma,
|
|
.driver = {
|
|
.name = ibmveth_driver_name,
|
|
.owner = THIS_MODULE,
|
|
.pm = &ibmveth_pm_ops,
|
|
}
|
|
};
|
|
|
|
static int __init ibmveth_module_init(void)
|
|
{
|
|
ibmveth_printk("%s: %s %s\n", ibmveth_driver_name, ibmveth_driver_string, ibmveth_driver_version);
|
|
|
|
ibmveth_proc_register_driver();
|
|
|
|
return vio_register_driver(&ibmveth_driver);
|
|
}
|
|
|
|
static void __exit ibmveth_module_exit(void)
|
|
{
|
|
vio_unregister_driver(&ibmveth_driver);
|
|
ibmveth_proc_unregister_driver();
|
|
}
|
|
|
|
module_init(ibmveth_module_init);
|
|
module_exit(ibmveth_module_exit);
|