From 9aa3283595451ca093500ff0977b106e1f465586 Mon Sep 17 00:00:00 2001 From: Jeff Kirsher Date: Fri, 13 May 2011 14:29:12 -0700 Subject: ehea/ibm*: Move the IBM drivers Move the IBM drivers into drivers/net/ethernet/ibm/ and make the necessary Kconfig and Makefile changes. - Renamed ibm_new_emac to emac - Cleaned up Makefile and Kconfig options which referred to IBM_NEW_EMAC to IBM_EMAC - ibmlana driver is a National Semiconductor SONIC driver so it was not moved CC: Christoph Raisch CC: Santiago Leon CC: Benjamin Herrenschmidt CC: David Gibson CC: Kyle Lucke CC: Michael Ellerman Signed-off-by: Jeff Kirsher --- drivers/net/ibmveth.c | 1619 ------------------------------------------------- 1 file changed, 1619 deletions(-) delete mode 100644 drivers/net/ibmveth.c (limited to 'drivers/net/ibmveth.c') diff --git a/drivers/net/ibmveth.c b/drivers/net/ibmveth.c deleted file mode 100644 index ba99af0..0000000 --- a/drivers/net/ibmveth.c +++ /dev/null @@ -1,1619 +0,0 @@ -/* - * IBM Power Virtual Ethernet Device Driver - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation; either version 2 of the License, or - * (at your option) any later version. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with this program; if not, write to the Free Software - * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. - * - * Copyright (C) IBM Corporation, 2003, 2010 - * - * Authors: Dave Larson - * Santiago Leon - * Brian King - * Robert Jennings - * Anton Blanchard - */ - -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "ibmveth.h" - -static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance); -static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter); -static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev); - -static struct kobj_type ktype_veth_pool; - - -static const char ibmveth_driver_name[] = "ibmveth"; -static const char ibmveth_driver_string[] = "IBM Power Virtual Ethernet Driver"; -#define ibmveth_driver_version "1.04" - -MODULE_AUTHOR("Santiago Leon "); -MODULE_DESCRIPTION("IBM Power Virtual Ethernet Driver"); -MODULE_LICENSE("GPL"); -MODULE_VERSION(ibmveth_driver_version); - -static unsigned int tx_copybreak __read_mostly = 128; -module_param(tx_copybreak, uint, 0644); -MODULE_PARM_DESC(tx_copybreak, - "Maximum size of packet that is copied to a new buffer on transmit"); - -static unsigned int rx_copybreak __read_mostly = 128; -module_param(rx_copybreak, uint, 0644); -MODULE_PARM_DESC(rx_copybreak, - "Maximum size of packet that is copied to a new buffer on receive"); - -static unsigned int rx_flush __read_mostly = 0; -module_param(rx_flush, uint, 0644); -MODULE_PARM_DESC(rx_flush, "Flush receive buffers before use"); - -struct ibmveth_stat { - char name[ETH_GSTRING_LEN]; - int offset; -}; - -#define IBMVETH_STAT_OFF(stat) offsetof(struct ibmveth_adapter, stat) -#define IBMVETH_GET_STAT(a, off) *((u64 *)(((unsigned long)(a)) + off)) - -struct ibmveth_stat ibmveth_stats[] = { - { "replenish_task_cycles", IBMVETH_STAT_OFF(replenish_task_cycles) }, - { "replenish_no_mem", IBMVETH_STAT_OFF(replenish_no_mem) }, - { "replenish_add_buff_failure", - IBMVETH_STAT_OFF(replenish_add_buff_failure) }, - { "replenish_add_buff_success", - IBMVETH_STAT_OFF(replenish_add_buff_success) }, - { "rx_invalid_buffer", IBMVETH_STAT_OFF(rx_invalid_buffer) }, - { "rx_no_buffer", IBMVETH_STAT_OFF(rx_no_buffer) }, - { "tx_map_failed", IBMVETH_STAT_OFF(tx_map_failed) }, - { "tx_send_failed", IBMVETH_STAT_OFF(tx_send_failed) }, - { "fw_enabled_ipv4_csum", IBMVETH_STAT_OFF(fw_ipv4_csum_support) }, - { "fw_enabled_ipv6_csum", IBMVETH_STAT_OFF(fw_ipv6_csum_support) }, -}; - -/* simple methods of getting data from the current rxq entry */ -static inline u32 ibmveth_rxq_flags(struct ibmveth_adapter *adapter) -{ - return adapter->rx_queue.queue_addr[adapter->rx_queue.index].flags_off; -} - -static inline int ibmveth_rxq_toggle(struct ibmveth_adapter *adapter) -{ - return (ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_TOGGLE) >> - IBMVETH_RXQ_TOGGLE_SHIFT; -} - -static inline int ibmveth_rxq_pending_buffer(struct ibmveth_adapter *adapter) -{ - return ibmveth_rxq_toggle(adapter) == adapter->rx_queue.toggle; -} - -static inline int ibmveth_rxq_buffer_valid(struct ibmveth_adapter *adapter) -{ - return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_VALID; -} - -static inline int ibmveth_rxq_frame_offset(struct ibmveth_adapter *adapter) -{ - return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_OFF_MASK; -} - -static inline int ibmveth_rxq_frame_length(struct ibmveth_adapter *adapter) -{ - return adapter->rx_queue.queue_addr[adapter->rx_queue.index].length; -} - -static inline int ibmveth_rxq_csum_good(struct ibmveth_adapter *adapter) -{ - return ibmveth_rxq_flags(adapter) & IBMVETH_RXQ_CSUM_GOOD; -} - -/* setup the initial settings for a buffer pool */ -static void ibmveth_init_buffer_pool(struct ibmveth_buff_pool *pool, - u32 pool_index, u32 pool_size, - u32 buff_size, u32 pool_active) -{ - pool->size = pool_size; - pool->index = pool_index; - pool->buff_size = buff_size; - pool->threshold = pool_size * 7 / 8; - pool->active = pool_active; -} - -/* allocate and setup an buffer pool - called during open */ -static int ibmveth_alloc_buffer_pool(struct ibmveth_buff_pool *pool) -{ - int i; - - pool->free_map = kmalloc(sizeof(u16) * pool->size, GFP_KERNEL); - - if (!pool->free_map) - return -1; - - pool->dma_addr = kmalloc(sizeof(dma_addr_t) * pool->size, GFP_KERNEL); - if (!pool->dma_addr) { - kfree(pool->free_map); - pool->free_map = NULL; - return -1; - } - - pool->skbuff = kcalloc(pool->size, sizeof(void *), GFP_KERNEL); - - if (!pool->skbuff) { - kfree(pool->dma_addr); - pool->dma_addr = NULL; - - kfree(pool->free_map); - pool->free_map = NULL; - return -1; - } - - memset(pool->dma_addr, 0, sizeof(dma_addr_t) * pool->size); - - for (i = 0; i < pool->size; ++i) - pool->free_map[i] = i; - - atomic_set(&pool->available, 0); - pool->producer_index = 0; - pool->consumer_index = 0; - - return 0; -} - -static inline void ibmveth_flush_buffer(void *addr, unsigned long length) -{ - unsigned long offset; - - for (offset = 0; offset < length; offset += SMP_CACHE_BYTES) - asm("dcbfl %0,%1" :: "b" (addr), "r" (offset)); -} - -/* replenish the buffers for a pool. note that we don't need to - * skb_reserve these since they are used for incoming... - */ -static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter, - struct ibmveth_buff_pool *pool) -{ - u32 i; - u32 count = pool->size - atomic_read(&pool->available); - u32 buffers_added = 0; - struct sk_buff *skb; - unsigned int free_index, index; - u64 correlator; - unsigned long lpar_rc; - dma_addr_t dma_addr; - - mb(); - - for (i = 0; i < count; ++i) { - union ibmveth_buf_desc desc; - - skb = netdev_alloc_skb(adapter->netdev, pool->buff_size); - - if (!skb) { - netdev_dbg(adapter->netdev, - "replenish: unable to allocate skb\n"); - adapter->replenish_no_mem++; - break; - } - - free_index = pool->consumer_index; - pool->consumer_index++; - if (pool->consumer_index >= pool->size) - pool->consumer_index = 0; - index = pool->free_map[free_index]; - - BUG_ON(index == IBM_VETH_INVALID_MAP); - BUG_ON(pool->skbuff[index] != NULL); - - dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, - pool->buff_size, DMA_FROM_DEVICE); - - if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) - goto failure; - - pool->free_map[free_index] = IBM_VETH_INVALID_MAP; - pool->dma_addr[index] = dma_addr; - pool->skbuff[index] = skb; - - correlator = ((u64)pool->index << 32) | index; - *(u64 *)skb->data = correlator; - - desc.fields.flags_len = IBMVETH_BUF_VALID | pool->buff_size; - desc.fields.address = dma_addr; - - if (rx_flush) { - unsigned int len = min(pool->buff_size, - adapter->netdev->mtu + - IBMVETH_BUFF_OH); - ibmveth_flush_buffer(skb->data, len); - } - lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, - desc.desc); - - if (lpar_rc != H_SUCCESS) { - goto failure; - } else { - buffers_added++; - adapter->replenish_add_buff_success++; - } - } - - mb(); - atomic_add(buffers_added, &(pool->available)); - return; - -failure: - pool->free_map[free_index] = index; - pool->skbuff[index] = NULL; - if (pool->consumer_index == 0) - pool->consumer_index = pool->size - 1; - else - pool->consumer_index--; - if (!dma_mapping_error(&adapter->vdev->dev, dma_addr)) - dma_unmap_single(&adapter->vdev->dev, - pool->dma_addr[index], pool->buff_size, - DMA_FROM_DEVICE); - dev_kfree_skb_any(skb); - adapter->replenish_add_buff_failure++; - - mb(); - atomic_add(buffers_added, &(pool->available)); -} - -/* replenish routine */ -static void ibmveth_replenish_task(struct ibmveth_adapter *adapter) -{ - int i; - - adapter->replenish_task_cycles++; - - for (i = (IBMVETH_NUM_BUFF_POOLS - 1); i >= 0; i--) { - struct ibmveth_buff_pool *pool = &adapter->rx_buff_pool[i]; - - if (pool->active && - (atomic_read(&pool->available) < pool->threshold)) - ibmveth_replenish_buffer_pool(adapter, pool); - } - - adapter->rx_no_buffer = *(u64 *)(((char*)adapter->buffer_list_addr) + - 4096 - 8); -} - -/* empty and free ana buffer pool - also used to do cleanup in error paths */ -static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter, - struct ibmveth_buff_pool *pool) -{ - int i; - - kfree(pool->free_map); - pool->free_map = NULL; - - if (pool->skbuff && pool->dma_addr) { - for (i = 0; i < pool->size; ++i) { - struct sk_buff *skb = pool->skbuff[i]; - if (skb) { - dma_unmap_single(&adapter->vdev->dev, - pool->dma_addr[i], - pool->buff_size, - DMA_FROM_DEVICE); - dev_kfree_skb_any(skb); - pool->skbuff[i] = NULL; - } - } - } - - if (pool->dma_addr) { - kfree(pool->dma_addr); - pool->dma_addr = NULL; - } - - if (pool->skbuff) { - kfree(pool->skbuff); - pool->skbuff = NULL; - } -} - -/* remove a buffer from a pool */ -static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter, - u64 correlator) -{ - unsigned int pool = correlator >> 32; - unsigned int index = correlator & 0xffffffffUL; - unsigned int free_index; - struct sk_buff *skb; - - BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); - BUG_ON(index >= adapter->rx_buff_pool[pool].size); - - skb = adapter->rx_buff_pool[pool].skbuff[index]; - - BUG_ON(skb == NULL); - - adapter->rx_buff_pool[pool].skbuff[index] = NULL; - - dma_unmap_single(&adapter->vdev->dev, - adapter->rx_buff_pool[pool].dma_addr[index], - adapter->rx_buff_pool[pool].buff_size, - DMA_FROM_DEVICE); - - free_index = adapter->rx_buff_pool[pool].producer_index; - adapter->rx_buff_pool[pool].producer_index++; - if (adapter->rx_buff_pool[pool].producer_index >= - adapter->rx_buff_pool[pool].size) - adapter->rx_buff_pool[pool].producer_index = 0; - adapter->rx_buff_pool[pool].free_map[free_index] = index; - - mb(); - - atomic_dec(&(adapter->rx_buff_pool[pool].available)); -} - -/* get the current buffer on the rx queue */ -static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *adapter) -{ - u64 correlator = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator; - unsigned int pool = correlator >> 32; - unsigned int index = correlator & 0xffffffffUL; - - BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); - BUG_ON(index >= adapter->rx_buff_pool[pool].size); - - return adapter->rx_buff_pool[pool].skbuff[index]; -} - -/* recycle the current buffer on the rx queue */ -static void ibmveth_rxq_recycle_buffer(struct ibmveth_adapter *adapter) -{ - u32 q_index = adapter->rx_queue.index; - u64 correlator = adapter->rx_queue.queue_addr[q_index].correlator; - unsigned int pool = correlator >> 32; - unsigned int index = correlator & 0xffffffffUL; - union ibmveth_buf_desc desc; - unsigned long lpar_rc; - - BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS); - BUG_ON(index >= adapter->rx_buff_pool[pool].size); - - if (!adapter->rx_buff_pool[pool].active) { - ibmveth_rxq_harvest_buffer(adapter); - ibmveth_free_buffer_pool(adapter, &adapter->rx_buff_pool[pool]); - return; - } - - desc.fields.flags_len = IBMVETH_BUF_VALID | - adapter->rx_buff_pool[pool].buff_size; - desc.fields.address = adapter->rx_buff_pool[pool].dma_addr[index]; - - lpar_rc = h_add_logical_lan_buffer(adapter->vdev->unit_address, desc.desc); - - if (lpar_rc != H_SUCCESS) { - netdev_dbg(adapter->netdev, "h_add_logical_lan_buffer failed " - "during recycle rc=%ld", lpar_rc); - 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_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); -- cgit v1.1