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![David Decotigny](/assets/img/avatar_default.png)
This updates the network drivers so that they don't access the ethtool_cmd::speed field directly, but use ethtool_cmd_speed() instead. For most of the drivers, these changes are purely cosmetic and don't fix any problem, such as for those 1GbE/10GbE drivers that indirectly call their own ethtool get_settings()/mii_ethtool_gset(). The changes are meant to enforce code consistency and provide robustness with future larger throughputs, at the expense of a few CPU cycles for each ethtool operation. All drivers compiled with make allyesconfig ion x86_64 have been updated. Tested: make allyesconfig on x86_64 + e1000e/bnx2x work Signed-off-by: David Decotigny <decot@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
1618 lines
44 KiB
C
1618 lines
44 KiB
C
/*
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* IBM Power Virtual Ethernet Device Driver
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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, USA.
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*
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* Copyright (C) IBM Corporation, 2003, 2010
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*
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* Authors: Dave Larson <larson1@us.ibm.com>
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* Santiago Leon <santil@linux.vnet.ibm.com>
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* Brian King <brking@linux.vnet.ibm.com>
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* Robert Jennings <rcj@linux.vnet.ibm.com>
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* Anton Blanchard <anton@au.ibm.com>
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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/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/mm.h>
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#include <linux/pm.h>
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#include <linux/ethtool.h>
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#include <linux/in.h>
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#include <linux/ip.h>
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#include <linux/ipv6.h>
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#include <linux/slab.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/firmware.h>
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#include "ibmveth.h"
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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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static const char ibmveth_driver_name[] = "ibmveth";
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static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver";
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#define ibmveth_driver_version "1.04"
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MODULE_AUTHOR("Santiago Leon <santil@linux.vnet.ibm.com>");
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MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver");
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MODULE_LICENSE("GPL");
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MODULE_VERSION(ibmveth_driver_version);
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static unsigned int tx_copybreak __read_mostly = 128;
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module_param(tx_copybreak, uint, 0644);
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MODULE_PARM_DESC(tx_copybreak,
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"Maximum size of packet that is copied to a new buffer on transmit");
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static unsigned int rx_copybreak __read_mostly = 128;
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module_param(rx_copybreak, uint, 0644);
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MODULE_PARM_DESC(rx_copybreak,
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"Maximum size of packet that is copied to a new buffer on receive");
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static unsigned int rx_flush __read_mostly = 0;
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module_param(rx_flush, uint, 0644);
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MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use");
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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",
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IBMVETH_STAT_OFF(replenish_add_buff_failure) },
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{ "replenish_add_buff_success",
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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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{ "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) },
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{ "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) },
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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) >>
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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,
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u32 pool_index, u32 pool_size,
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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 * 7 / 8;
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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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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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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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static inline void ibmveth_flush_buffer(void *addr, unsigned long length)
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{
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unsigned long offset;
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for (offset = 0; offset < length; offset += SMP_CACHE_BYTES)
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asm("dcbfl %0,%1" :: "b" (addr), "r" (offset));
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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,
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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 = netdev_alloc_skb(adapter->netdev, pool->buff_size);
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if (!skb) {
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netdev_dbg(adapter->netdev,
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"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++;
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if (pool->consumer_index >= pool->size)
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pool->consumer_index = 0;
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index = pool->free_map[free_index];
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BUG_ON(index == IBM_VETH_INVALID_MAP);
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BUG_ON(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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if (rx_flush) {
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unsigned int len = min(pool->buff_size,
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adapter->netdev->mtu +
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IBMVETH_BUFF_OH);
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ibmveth_flush_buffer(skb->data, len);
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}
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lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address,
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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 = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) {
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struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i];
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if (pool->active &&
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(atomic_read(&pool->available) < pool->threshold))
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ibmveth_replenish_buffer_pool(adapter, pool);
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}
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adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) +
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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,
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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,
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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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BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
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BUG_ON(index >= adapter->rx_buff_pool[pool].size);
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skb = adapter->rx_buff_pool[pool].skbuff[index];
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BUG_ON(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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if (adapter->rx_buff_pool[pool].producer_index >=
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adapter->rx_buff_pool[pool].size)
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adapter->rx_buff_pool[pool].producer_index = 0;
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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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|
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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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BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
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BUG_ON(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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|
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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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BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
|
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BUG_ON(index >= adapter->rx_buff_pool[pool].size);
|
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|
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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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|
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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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netdev_dbg(adapter->netdev, "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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}
|
|
|
|
if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
|
|
adapter->rx_queue.index = 0;
|
|
adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
|
|
}
|
|
}
|
|
|
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static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter)
|
|
{
|
|
ibmveth_remove_buffer_from_pool(adapter, adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator);
|
|
|
|
if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
|
|
adapter->rx_queue.index = 0;
|
|
adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
|
|
}
|
|
}
|
|
|
|
static void ibmveth_cleanup(struct ibmveth_adapter *adapter)
|
|
{
|
|
int i;
|
|
struct device *dev = &adapter->vdev->dev;
|
|
|
|
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 < IBMVETH_NUM_BUFF_POOLS; 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;
|
|
|
|
netdev_dbg(netdev, "open starting\n");
|
|
|
|
napi_enable(&adapter->napi);
|
|
|
|
for(i = 0; i < IBMVETH_NUM_BUFF_POOLS; 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) {
|
|
netdev_err(netdev, "unable to allocate filter or buffer list "
|
|
"pages\n");
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
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) {
|
|
netdev_err(netdev, "unable to allocate rx queue pages\n");
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
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))) {
|
|
netdev_err(netdev, "unable to map filter or buffer list "
|
|
"pages\n");
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
|
|
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;
|
|
|
|
netdev_dbg(netdev, "buffer list @ 0x%p\n", adapter->buffer_list_addr);
|
|
netdev_dbg(netdev, "filter list @ 0x%p\n", adapter->filter_list_addr);
|
|
netdev_dbg(netdev, "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) {
|
|
netdev_err(netdev, "h_register_logical_lan failed with %ld\n",
|
|
lpar_rc);
|
|
netdev_err(netdev, "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);
|
|
rc = -ENONET;
|
|
goto err_out;
|
|
}
|
|
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
|
|
if (!adapter->rx_buff_pool[i].active)
|
|
continue;
|
|
if (ibmveth_alloc_buffer_pool(&adapter->rx_buff_pool[i])) {
|
|
netdev_err(netdev, "unable to alloc pool\n");
|
|
adapter->rx_buff_pool[i].active = 0;
|
|
rc = -ENOMEM;
|
|
goto err_out;
|
|
}
|
|
}
|
|
|
|
netdev_dbg(netdev, "registering irq 0x%x\n", netdev->irq);
|
|
rc = request_irq(netdev->irq, ibmveth_interrupt, 0, netdev->name,
|
|
netdev);
|
|
if (rc != 0) {
|
|
netdev_err(netdev, "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));
|
|
|
|
goto err_out;
|
|
}
|
|
|
|
adapter->bounce_buffer =
|
|
kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL);
|
|
if (!adapter->bounce_buffer) {
|
|
netdev_err(netdev, "unable to allocate bounce buffer\n");
|
|
rc = -ENOMEM;
|
|
goto err_out_free_irq;
|
|
}
|
|
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)) {
|
|
netdev_err(netdev, "unable to map bounce buffer\n");
|
|
rc = -ENOMEM;
|
|
goto err_out_free_irq;
|
|
}
|
|
|
|
netdev_dbg(netdev, "initial replenish cycle\n");
|
|
ibmveth_interrupt(netdev->irq, netdev);
|
|
|
|
netif_start_queue(netdev);
|
|
|
|
netdev_dbg(netdev, "open complete\n");
|
|
|
|
return 0;
|
|
|
|
err_out_free_irq:
|
|
free_irq(netdev->irq, netdev);
|
|
err_out:
|
|
ibmveth_cleanup(adapter);
|
|
napi_disable(&adapter->napi);
|
|
return rc;
|
|
}
|
|
|
|
static int ibmveth_close(struct net_device *netdev)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
long lpar_rc;
|
|
|
|
netdev_dbg(netdev, "close starting\n");
|
|
|
|
napi_disable(&adapter->napi);
|
|
|
|
if (!adapter->pool_config)
|
|
netif_stop_queue(netdev);
|
|
|
|
h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_DISABLE);
|
|
|
|
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) {
|
|
netdev_err(netdev, "h_free_logical_lan failed with %lx, "
|
|
"continuing with close\n", lpar_rc);
|
|
}
|
|
|
|
free_irq(netdev->irq, netdev);
|
|
|
|
adapter->rx_no_buffer = *(u64 *)(((char *)adapter->buffer_list_addr) +
|
|
4096 - 8);
|
|
|
|
ibmveth_cleanup(adapter);
|
|
|
|
netdev_dbg(netdev, "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);
|
|
ethtool_cmd_speed_set(cmd, 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 ibmveth_fix_features(struct net_device *dev, u32 features)
|
|
{
|
|
/*
|
|
* 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.
|
|
*/
|
|
|
|
if (!(features & NETIF_F_RXCSUM))
|
|
features &= ~NETIF_F_ALL_CSUM;
|
|
|
|
return features;
|
|
}
|
|
|
|
static int ibmveth_set_csum_offload(struct net_device *dev, u32 data)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
unsigned long set_attr, clr_attr, ret_attr;
|
|
unsigned long set_attr6, clr_attr6;
|
|
long ret, ret6;
|
|
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;
|
|
set_attr6 = IBMVETH_ILLAN_IPV6_TCP_CSUM;
|
|
} else {
|
|
clr_attr = IBMVETH_ILLAN_IPV4_TCP_CSUM;
|
|
clr_attr6 = IBMVETH_ILLAN_IPV6_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) {
|
|
netdev_err(dev, "unable to change IPv4 checksum "
|
|
"offload settings. %d rc=%ld\n",
|
|
data, ret);
|
|
|
|
ret = h_illan_attributes(adapter->vdev->unit_address,
|
|
set_attr, clr_attr, &ret_attr);
|
|
} else {
|
|
adapter->fw_ipv4_csum_support = data;
|
|
}
|
|
|
|
ret6 = h_illan_attributes(adapter->vdev->unit_address,
|
|
clr_attr6, set_attr6, &ret_attr);
|
|
|
|
if (ret6 != H_SUCCESS) {
|
|
netdev_err(dev, "unable to change IPv6 checksum "
|
|
"offload settings. %d rc=%ld\n",
|
|
data, ret);
|
|
|
|
ret = h_illan_attributes(adapter->vdev->unit_address,
|
|
set_attr6, clr_attr6,
|
|
&ret_attr);
|
|
} else
|
|
adapter->fw_ipv6_csum_support = data;
|
|
|
|
if (ret != H_SUCCESS || ret6 != H_SUCCESS)
|
|
adapter->rx_csum = data;
|
|
else
|
|
rc1 = -EIO;
|
|
} else {
|
|
rc1 = -EIO;
|
|
netdev_err(dev, "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_features(struct net_device *dev, u32 features)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(dev);
|
|
int rx_csum = !!(features & NETIF_F_RXCSUM);
|
|
int rc;
|
|
|
|
if (rx_csum == adapter->rx_csum)
|
|
return 0;
|
|
|
|
rc = ibmveth_set_csum_offload(dev, rx_csum);
|
|
if (rc && !adapter->rx_csum)
|
|
dev->features = features & ~(NETIF_F_ALL_CSUM | NETIF_F_RXCSUM);
|
|
|
|
return rc;
|
|
}
|
|
|
|
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 = ethtool_op_get_link,
|
|
.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 int ibmveth_send(struct ibmveth_adapter *adapter,
|
|
union ibmveth_buf_desc *descs)
|
|
{
|
|
unsigned long correlator;
|
|
unsigned int retry_count;
|
|
unsigned long ret;
|
|
|
|
/*
|
|
* The retry count sets a maximum for the number of broadcast and
|
|
* multicast destinations within the system.
|
|
*/
|
|
retry_count = 1024;
|
|
correlator = 0;
|
|
do {
|
|
ret = h_send_logical_lan(adapter->vdev->unit_address,
|
|
descs[0].desc, descs[1].desc,
|
|
descs[2].desc, descs[3].desc,
|
|
descs[4].desc, descs[5].desc,
|
|
correlator, &correlator);
|
|
} while ((ret == H_BUSY) && (retry_count--));
|
|
|
|
if (ret != H_SUCCESS && ret != H_DROPPED) {
|
|
netdev_err(adapter->netdev, "tx: h_send_logical_lan failed "
|
|
"with rc=%ld\n", ret);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static netdev_tx_t ibmveth_start_xmit(struct sk_buff *skb,
|
|
struct net_device *netdev)
|
|
{
|
|
struct ibmveth_adapter *adapter = netdev_priv(netdev);
|
|
unsigned int desc_flags;
|
|
union ibmveth_buf_desc descs[6];
|
|
int last, i;
|
|
int force_bounce = 0;
|
|
|
|
/*
|
|
* veth handles a maximum of 6 segments including the header, so
|
|
* we have to linearize the skb if there are more than this.
|
|
*/
|
|
if (skb_shinfo(skb)->nr_frags > 5 && __skb_linearize(skb)) {
|
|
netdev->stats.tx_dropped++;
|
|
goto out;
|
|
}
|
|
|
|
/* veth can't checksum offload UDP */
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL &&
|
|
((skb->protocol == htons(ETH_P_IP) &&
|
|
ip_hdr(skb)->protocol != IPPROTO_TCP) ||
|
|
(skb->protocol == htons(ETH_P_IPV6) &&
|
|
ipv6_hdr(skb)->nexthdr != IPPROTO_TCP)) &&
|
|
skb_checksum_help(skb)) {
|
|
|
|
netdev_err(netdev, "tx: failed to checksum packet\n");
|
|
netdev->stats.tx_dropped++;
|
|
goto out;
|
|
}
|
|
|
|
desc_flags = IBMVETH_BUF_VALID;
|
|
|
|
if (skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
unsigned char *buf = skb_transport_header(skb) +
|
|
skb->csum_offset;
|
|
|
|
desc_flags |= (IBMVETH_BUF_NO_CSUM | IBMVETH_BUF_CSUM_GOOD);
|
|
|
|
/* Need to zero out the checksum */
|
|
buf[0] = 0;
|
|
buf[1] = 0;
|
|
}
|
|
|
|
retry_bounce:
|
|
memset(descs, 0, sizeof(descs));
|
|
|
|
/*
|
|
* If a linear packet is below the rx threshold then
|
|
* copy it into the static bounce buffer. This avoids the
|
|
* cost of a TCE insert and remove.
|
|
*/
|
|
if (force_bounce || (!skb_is_nonlinear(skb) &&
|
|
(skb->len < tx_copybreak))) {
|
|
skb_copy_from_linear_data(skb, adapter->bounce_buffer,
|
|
skb->len);
|
|
|
|
descs[0].fields.flags_len = desc_flags | skb->len;
|
|
descs[0].fields.address = adapter->bounce_buffer_dma;
|
|
|
|
if (ibmveth_send(adapter, descs)) {
|
|
adapter->tx_send_failed++;
|
|
netdev->stats.tx_dropped++;
|
|
} else {
|
|
netdev->stats.tx_packets++;
|
|
netdev->stats.tx_bytes += skb->len;
|
|
}
|
|
|
|
goto out;
|
|
}
|
|
|
|
/* Map the header */
|
|
descs[0].fields.address = dma_map_single(&adapter->vdev->dev, skb->data,
|
|
skb_headlen(skb),
|
|
DMA_TO_DEVICE);
|
|
if (dma_mapping_error(&adapter->vdev->dev, descs[0].fields.address))
|
|
goto map_failed;
|
|
|
|
descs[0].fields.flags_len = desc_flags | skb_headlen(skb);
|
|
|
|
/* Map the frags */
|
|
for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) {
|
|
unsigned long dma_addr;
|
|
skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
|
|
|
|
dma_addr = dma_map_page(&adapter->vdev->dev, frag->page,
|
|
frag->page_offset, frag->size,
|
|
DMA_TO_DEVICE);
|
|
|
|
if (dma_mapping_error(&adapter->vdev->dev, dma_addr))
|
|
goto map_failed_frags;
|
|
|
|
descs[i+1].fields.flags_len = desc_flags | frag->size;
|
|
descs[i+1].fields.address = dma_addr;
|
|
}
|
|
|
|
if (ibmveth_send(adapter, descs)) {
|
|
adapter->tx_send_failed++;
|
|
netdev->stats.tx_dropped++;
|
|
} else {
|
|
netdev->stats.tx_packets++;
|
|
netdev->stats.tx_bytes += skb->len;
|
|
}
|
|
|
|
for (i = 0; i < skb_shinfo(skb)->nr_frags + 1; i++)
|
|
dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
|
|
descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
|
|
DMA_TO_DEVICE);
|
|
|
|
out:
|
|
dev_kfree_skb(skb);
|
|
return NETDEV_TX_OK;
|
|
|
|
map_failed_frags:
|
|
last = i+1;
|
|
for (i = 0; i < last; i++)
|
|
dma_unmap_page(&adapter->vdev->dev, descs[i].fields.address,
|
|
descs[i].fields.flags_len & IBMVETH_BUF_LEN_MASK,
|
|
DMA_TO_DEVICE);
|
|
|
|
map_failed:
|
|
if (!firmware_has_feature(FW_FEATURE_CMO))
|
|
netdev_err(netdev, "tx: unable to map xmit buffer\n");
|
|
adapter->tx_map_failed++;
|
|
skb_linearize(skb);
|
|
force_bounce = 1;
|
|
goto retry_bounce;
|
|
}
|
|
|
|
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 {
|
|
if (!ibmveth_rxq_pending_buffer(adapter))
|
|
break;
|
|
|
|
smp_rmb();
|
|
if (!ibmveth_rxq_buffer_valid(adapter)) {
|
|
wmb(); /* suggested by larson1 */
|
|
adapter->rx_invalid_buffer++;
|
|
netdev_dbg(netdev, "recycling invalid buffer\n");
|
|
ibmveth_rxq_recycle_buffer(adapter);
|
|
} else {
|
|
struct sk_buff *skb, *new_skb;
|
|
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);
|
|
|
|
new_skb = NULL;
|
|
if (length < rx_copybreak)
|
|
new_skb = netdev_alloc_skb(netdev, length);
|
|
|
|
if (new_skb) {
|
|
skb_copy_to_linear_data(new_skb,
|
|
skb->data + offset,
|
|
length);
|
|
if (rx_flush)
|
|
ibmveth_flush_buffer(skb->data,
|
|
length + offset);
|
|
skb = new_skb;
|
|
ibmveth_rxq_recycle_buffer(adapter);
|
|
} else {
|
|
ibmveth_rxq_harvest_buffer(adapter);
|
|
skb_reserve(skb, offset);
|
|
}
|
|
|
|
skb_put(skb, length);
|
|
skb->protocol = eth_type_trans(skb, netdev);
|
|
|
|
if (csum_good)
|
|
skb->ip_summed = CHECKSUM_UNNECESSARY;
|
|
|
|
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);
|
|
|
|
BUG_ON(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);
|
|
BUG_ON(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) {
|
|
netdev_err(netdev, "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) {
|
|
netdev_err(netdev, "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) {
|
|
netdev_err(netdev, "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) {
|
|
netdev_err(netdev, "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, rc;
|
|
int need_restart = 0;
|
|
|
|
if (new_mtu < IBMVETH_MIN_MTU)
|
|
return -EINVAL;
|
|
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
|
|
if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size)
|
|
break;
|
|
|
|
if (i == IBMVETH_NUM_BUFF_POOLS)
|
|
return -EINVAL;
|
|
|
|
/* Deactivate all the buffer pools so that the next loop can activate
|
|
only the buffer pools necessary to hold the new MTU */
|
|
if (netif_running(adapter->netdev)) {
|
|
need_restart = 1;
|
|
adapter->pool_config = 1;
|
|
ibmveth_close(adapter->netdev);
|
|
adapter->pool_config = 0;
|
|
}
|
|
|
|
/* Look for an active buffer pool that can hold the new MTU */
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++) {
|
|
adapter->rx_buff_pool[i].active = 1;
|
|
|
|
if (new_mtu_oh < adapter->rx_buff_pool[i].buff_size) {
|
|
dev->mtu = new_mtu;
|
|
vio_cmo_set_dev_desired(viodev,
|
|
ibmveth_get_desired_dma
|
|
(viodev));
|
|
if (need_restart) {
|
|
return ibmveth_open(adapter->netdev);
|
|
}
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
if (need_restart && (rc = ibmveth_open(adapter->netdev)))
|
|
return rc;
|
|
|
|
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 < IBMVETH_NUM_BUFF_POOLS; 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_fix_features = ibmveth_fix_features,
|
|
.ndo_set_features = ibmveth_set_features,
|
|
.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;
|
|
struct net_device *netdev;
|
|
struct ibmveth_adapter *adapter;
|
|
unsigned char *mac_addr_p;
|
|
unsigned int *mcastFilterSize_p;
|
|
|
|
dev_dbg(&dev->dev, "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) {
|
|
dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
mcastFilterSize_p = (unsigned int *)vio_get_attribute(dev,
|
|
VETH_MCAST_FILTER_SIZE, NULL);
|
|
if (!mcastFilterSize_p) {
|
|
dev_err(&dev->dev, "Can't find VETH_MCAST_FILTER_SIZE "
|
|
"attribute\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
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->hw_features = NETIF_F_SG | NETIF_F_RXCSUM |
|
|
NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM;
|
|
netdev->features |= netdev->hw_features;
|
|
|
|
memcpy(netdev->dev_addr, &adapter->mac_addr, netdev->addr_len);
|
|
|
|
for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; 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);
|
|
}
|
|
|
|
netdev_dbg(netdev, "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;
|
|
|
|
netdev_dbg(netdev, "registering netdev...\n");
|
|
|
|
ibmveth_set_features(netdev, netdev->features);
|
|
|
|
rc = register_netdev(netdev);
|
|
|
|
if (rc) {
|
|
netdev_dbg(netdev, "failed to register netdev rc=%d\n", rc);
|
|
free_netdev(netdev);
|
|
return rc;
|
|
}
|
|
|
|
netdev_dbg(netdev, "registered\n");
|
|
|
|
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 < IBMVETH_NUM_BUFF_POOLS; i++)
|
|
kobject_put(&adapter->rx_buff_pool[i].kobj);
|
|
|
|
unregister_netdev(netdev);
|
|
|
|
free_netdev(netdev);
|
|
dev_set_drvdata(&dev->dev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
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)) {
|
|
netdev_err(netdev,
|
|
"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 < IBMVETH_NUM_BUFF_POOLS; 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 == IBMVETH_NUM_BUFF_POOLS) {
|
|
netdev_err(netdev, "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)
|
|
{
|
|
printk(KERN_DEBUG "%s: %s %s\n", ibmveth_driver_name,
|
|
ibmveth_driver_string, ibmveth_driver_version);
|
|
|
|
return vio_register_driver(&ibmveth_driver);
|
|
}
|
|
|
|
static void __exit ibmveth_module_exit(void)
|
|
{
|
|
vio_unregister_driver(&ibmveth_driver);
|
|
}
|
|
|
|
module_init(ibmveth_module_init);
|
|
module_exit(ibmveth_module_exit);
|