| /* |
| * 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 <larson1@us.ibm.com> |
| * Santiago Leon <santil@linux.vnet.ibm.com> |
| * Brian King <brking@linux.vnet.ibm.com> |
| * Robert Jennings <rcj@linux.vnet.ibm.com> |
| * Anton Blanchard <anton@au.ibm.com> |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/moduleparam.h> |
| #include <linux/types.h> |
| #include <linux/errno.h> |
| #include <linux/dma-mapping.h> |
| #include <linux/kernel.h> |
| #include <linux/netdevice.h> |
| #include <linux/etherdevice.h> |
| #include <linux/skbuff.h> |
| #include <linux/init.h> |
| #include <linux/interrupt.h> |
| #include <linux/mm.h> |
| #include <linux/pm.h> |
| #include <linux/ethtool.h> |
| #include <linux/in.h> |
| #include <linux/ip.h> |
| #include <linux/ipv6.h> |
| #include <linux/slab.h> |
| #include <asm/hvcall.h> |
| #include <linux/atomic.h> |
| #include <asm/vio.h> |
| #include <asm/iommu.h> |
| #include <asm/firmware.h> |
| |
| #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 <santil@linux.vnet.ibm.com>"); |
| 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 be32_to_cpu(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 be32_to_cpu(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 int 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; |
| int ret = 1; |
| |
| 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]); |
| goto out; |
| } |
| |
| 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); |
| ret = 0; |
| } |
| |
| if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) { |
| adapter->rx_queue.index = 0; |
| adapter->rx_queue.toggle = !adapter->rx_queue.toggle; |
| } |
| |
| out: |
| return ret; |
| } |
| |
| 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) { |
| dma_free_coherent(dev, adapter->rx_queue.queue_len, |
| adapter->rx_queue.queue_addr, |
| adapter->rx_queue.queue_dma); |
| 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; |
| } |
| |
| dev = &adapter->vdev->dev; |
| |
| adapter->rx_queue.queue_len = sizeof(struct ibmveth_rx_q_entry) * |
| rxq_entries; |
| adapter->rx_queue.queue_addr = |
| dma_alloc_coherent(dev, adapter->rx_queue.queue_len, |
| &adapter->rx_queue.queue_dma, GFP_KERNEL); |
| if (!adapter->rx_queue.queue_addr) { |
| rc = -ENOMEM; |
| goto err_out; |
| } |
| |
| 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); |
| |
| if ((dma_mapping_error(dev, adapter->buffer_list_dma)) || |
| (dma_mapping_error(dev, adapter->filter_list_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 { |
| lpar_rc = h_free_logical_lan(adapter->vdev->unit_address); |
| } while (H_IS_LONG_BUSY(lpar_rc) || (lpar_rc == H_BUSY)); |
| |
| goto err_out; |
| } |
| |
| adapter->bounce_buffer = |
| kmalloc(netdev->mtu + IBMVETH_BUFF_OH, GFP_KERNEL); |
| if (!adapter->bounce_buffer) { |
| 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) |
| { |
| strlcpy(info->driver, ibmveth_driver_name, sizeof(info->driver)); |
| strlcpy(info->version, ibmveth_driver_version, sizeof(info->version)); |
| } |
| |
| static netdev_features_t ibmveth_fix_features(struct net_device *dev, |
| netdev_features_t 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, ret4, 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; |
| set_attr6 = 0; |
| clr_attr6 = 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)) { |
| ret4 = h_illan_attributes(adapter->vdev->unit_address, clr_attr, |
| set_attr, &ret_attr); |
| |
| if (ret4 != H_SUCCESS) { |
| netdev_err(dev, "unable to change IPv4 checksum " |
| "offload settings. %d rc=%ld\n", |
| data, ret4); |
| |
| h_illan_attributes(adapter->vdev->unit_address, |
| set_attr, clr_attr, &ret_attr); |
| |
| if (data == 1) |
| dev->features &= ~NETIF_F_IP_CSUM; |
| |
| } 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, ret6); |
| |
| h_illan_attributes(adapter->vdev->unit_address, |
| set_attr6, clr_attr6, &ret_attr); |
| |
| if (data == 1) |
| dev->features &= ~NETIF_F_IPV6_CSUM; |
| |
| } else |
| adapter->fw_ipv6_csum_support = data; |
| |
| if (ret4 == 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, |
| netdev_features_t 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; |
| dma_addr_t dma_addr; |
| |
| /* |
| * 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 */ |
| dma_addr = dma_map_single(&adapter->vdev->dev, skb->data, |
| skb_headlen(skb), DMA_TO_DEVICE); |
| if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
| goto map_failed; |
| |
| descs[0].fields.flags_len = desc_flags | skb_headlen(skb); |
| descs[0].fields.address = dma_addr; |
| |
| /* Map the frags */ |
| for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) { |
| const skb_frag_t *frag = &skb_shinfo(skb)->frags[i]; |
| |
| dma_addr = skb_frag_dma_map(&adapter->vdev->dev, frag, 0, |
| skb_frag_size(frag), DMA_TO_DEVICE); |
| |
| if (dma_mapping_error(&adapter->vdev->dev, dma_addr)) |
| goto map_failed_frags; |
| |
| descs[i+1].fields.flags_len = desc_flags | skb_frag_size(frag); |
| 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; |
| } |
| |
| dma_unmap_single(&adapter->vdev->dev, |
| descs[0].fields.address, |
| descs[0].fields.flags_len & IBMVETH_BUF_LEN_MASK, |
| DMA_TO_DEVICE); |
| |
| for (i = 1; 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); |
| if (!ibmveth_rxq_recycle_buffer(adapter)) |
| kfree_skb(skb); |
| skb = new_skb; |
| } 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, ETH_ALEN); |
| 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; |
| struct iommu_table *tbl; |
| unsigned long ret; |
| int i; |
| int rxqentries = 1; |
| |
| tbl = get_iommu_table_base(&vdev->dev); |
| |
| /* netdev inits at probe time along with the structures we need below*/ |
| if (netdev == NULL) |
| return IOMMU_PAGE_ALIGN(IBMVETH_IO_ENTITLEMENT_DEFAULT, tbl); |
| |
| adapter = netdev_priv(netdev); |
| |
| ret = IBMVETH_BUFF_LIST_SIZE + IBMVETH_FILT_LIST_SIZE; |
| ret += IOMMU_PAGE_ALIGN(netdev->mtu, tbl); |
| |
| 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, tbl); |
| 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), tbl); |
| |
| 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_rx_mode = 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 ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id) |
| { |
| int rc, i, mac_len; |
| 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, |
| &mac_len); |
| if (!mac_addr_p) { |
| dev_err(&dev->dev, "Can't find VETH_MAC_ADDR attribute\n"); |
| return -EINVAL; |
| } |
| /* Workaround for old/broken pHyp */ |
| if (mac_len == 8) |
| mac_addr_p += 2; |
| else if (mac_len != 6) { |
| dev_err(&dev->dev, "VETH_MAC_ADDR attribute wrong len %d\n", |
| mac_len); |
| 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); |
| |
| adapter->mac_addr = 0; |
| memcpy(&adapter->mac_addr, mac_addr_p, ETH_ALEN); |
| |
| 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 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[] = { |
| { "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, |
| .name = ibmveth_driver_name, |
| .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); |