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Merge branch 'net-ibmveth-make-ibmveth-use-new-reset-function-and-new-kunit-testsg'
Dave Marquardt says: ==================== net: ibmveth: Make ibmveth use new reset function and new KUnit testsg - Fixed struct ibmveth_adapter indentation - Made ibmveth driver use WARN_ON with recovery rather than BUG_ON. Some recovery code schedules a reset through new function ibmveth_reset. Also removed a conflicting and unneeded forward declaration. - Added KUnit tests for some areas changed by the WARN_ON changes. ==================== Link: https://patch.msgid.link/20250501194944.283729-1-davemarq@linux.ibm.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>
This commit is contained in:
Paolo Abeni
commit
90131a9b06
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@ -27,6 +27,19 @@ config IBMVETH
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To compile this driver as a module, choose M here. The module will
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be called ibmveth.
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config IBMVETH_KUNIT_TEST
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bool "KUnit test for IBM LAN Virtual Ethernet support" if !KUNIT_ALL_TESTS
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depends on KUNIT
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depends on KUNIT=y && IBMVETH=y
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default KUNIT_ALL_TESTS
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help
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This builds unit tests for the IBM LAN Virtual Ethernet driver.
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For more information on KUnit and unit tests in general, please refer
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to the KUnit documentation in Documentation/dev-tools/kunit/.
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If unsure, say N.
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source "drivers/net/ethernet/ibm/emac/Kconfig"
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config EHEA
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@ -39,8 +39,6 @@
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#include "ibmveth.h"
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static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance);
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static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter,
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bool reuse);
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static unsigned long ibmveth_get_desired_dma(struct vio_dev *vdev);
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static struct kobj_type ktype_veth_pool;
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@ -231,7 +229,10 @@ static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter,
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index = pool->free_map[free_index];
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skb = NULL;
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BUG_ON(index == IBM_VETH_INVALID_MAP);
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if (WARN_ON(index == IBM_VETH_INVALID_MAP)) {
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schedule_work(&adapter->work);
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goto bad_index_failure;
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}
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/* are we allocating a new buffer or recycling an old one */
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if (pool->skbuff[index])
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@ -300,6 +301,7 @@ static void ibmveth_replenish_buffer_pool(struct ibmveth_adapter *adapter,
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DMA_FROM_DEVICE);
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dev_kfree_skb_any(pool->skbuff[index]);
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pool->skbuff[index] = NULL;
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bad_index_failure:
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adapter->replenish_add_buff_failure++;
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mb();
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@ -370,20 +372,36 @@ static void ibmveth_free_buffer_pool(struct ibmveth_adapter *adapter,
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}
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}
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/* remove a buffer from a pool */
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static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
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u64 correlator, bool reuse)
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/**
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* ibmveth_remove_buffer_from_pool - remove a buffer from a pool
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* @adapter: adapter instance
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* @correlator: identifies pool and index
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* @reuse: whether to reuse buffer
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*
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* Return:
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* * %0 - success
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* * %-EINVAL - correlator maps to pool or index out of range
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* * %-EFAULT - pool and index map to null skb
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*/
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static int ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
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u64 correlator, bool reuse)
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{
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unsigned int pool = correlator >> 32;
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unsigned int index = correlator & 0xffffffffUL;
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unsigned int free_index;
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struct sk_buff *skb;
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BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
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BUG_ON(index >= adapter->rx_buff_pool[pool].size);
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if (WARN_ON(pool >= IBMVETH_NUM_BUFF_POOLS) ||
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WARN_ON(index >= adapter->rx_buff_pool[pool].size)) {
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schedule_work(&adapter->work);
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return -EINVAL;
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}
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skb = adapter->rx_buff_pool[pool].skbuff[index];
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BUG_ON(skb == NULL);
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if (WARN_ON(!skb)) {
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schedule_work(&adapter->work);
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return -EFAULT;
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}
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/* if we are going to reuse the buffer then keep the pointers around
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* but mark index as available. replenish will see the skb pointer and
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@ -411,6 +429,8 @@ static void ibmveth_remove_buffer_from_pool(struct ibmveth_adapter *adapter,
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mb();
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atomic_dec(&(adapter->rx_buff_pool[pool].available));
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return 0;
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}
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/* get the current buffer on the rx queue */
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@ -420,24 +440,44 @@ static inline struct sk_buff *ibmveth_rxq_get_buffer(struct ibmveth_adapter *ada
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unsigned int pool = correlator >> 32;
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unsigned int index = correlator & 0xffffffffUL;
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BUG_ON(pool >= IBMVETH_NUM_BUFF_POOLS);
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BUG_ON(index >= adapter->rx_buff_pool[pool].size);
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if (WARN_ON(pool >= IBMVETH_NUM_BUFF_POOLS) ||
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WARN_ON(index >= adapter->rx_buff_pool[pool].size)) {
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schedule_work(&adapter->work);
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return NULL;
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}
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return adapter->rx_buff_pool[pool].skbuff[index];
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}
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static void ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter,
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bool reuse)
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/**
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* ibmveth_rxq_harvest_buffer - Harvest buffer from pool
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*
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* @adapter: pointer to adapter
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* @reuse: whether to reuse buffer
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*
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* Context: called from ibmveth_poll
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*
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* Return:
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* * %0 - success
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* * other - non-zero return from ibmveth_remove_buffer_from_pool
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*/
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static int ibmveth_rxq_harvest_buffer(struct ibmveth_adapter *adapter,
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bool reuse)
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{
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u64 cor;
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int rc;
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cor = adapter->rx_queue.queue_addr[adapter->rx_queue.index].correlator;
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ibmveth_remove_buffer_from_pool(adapter, cor, reuse);
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rc = ibmveth_remove_buffer_from_pool(adapter, cor, reuse);
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if (unlikely(rc))
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return rc;
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if (++adapter->rx_queue.index == adapter->rx_queue.num_slots) {
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adapter->rx_queue.index = 0;
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adapter->rx_queue.toggle = !adapter->rx_queue.toggle;
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}
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return 0;
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}
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static void ibmveth_free_tx_ltb(struct ibmveth_adapter *adapter, int idx)
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@ -709,6 +749,35 @@ static int ibmveth_close(struct net_device *netdev)
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return 0;
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}
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/**
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* ibmveth_reset - Handle scheduled reset work
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*
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* @w: pointer to work_struct embedded in adapter structure
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*
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* Context: This routine acquires rtnl_mutex and disables its NAPI through
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* ibmveth_close. It can't be called directly in a context that has
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* already acquired rtnl_mutex or disabled its NAPI, or directly from
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* a poll routine.
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*
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* Return: void
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*/
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static void ibmveth_reset(struct work_struct *w)
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{
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struct ibmveth_adapter *adapter = container_of(w, struct ibmveth_adapter, work);
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struct net_device *netdev = adapter->netdev;
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netdev_dbg(netdev, "reset starting\n");
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rtnl_lock();
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dev_close(adapter->netdev);
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dev_open(adapter->netdev, NULL);
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rtnl_unlock();
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netdev_dbg(netdev, "reset complete\n");
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}
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static int ibmveth_set_link_ksettings(struct net_device *dev,
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const struct ethtool_link_ksettings *cmd)
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{
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@ -1324,7 +1393,8 @@ static int ibmveth_poll(struct napi_struct *napi, int budget)
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wmb(); /* suggested by larson1 */
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adapter->rx_invalid_buffer++;
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netdev_dbg(netdev, "recycling invalid buffer\n");
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ibmveth_rxq_harvest_buffer(adapter, true);
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if (unlikely(ibmveth_rxq_harvest_buffer(adapter, true)))
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break;
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} else {
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struct sk_buff *skb, *new_skb;
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int length = ibmveth_rxq_frame_length(adapter);
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@ -1334,6 +1404,8 @@ static int ibmveth_poll(struct napi_struct *napi, int budget)
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__sum16 iph_check = 0;
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skb = ibmveth_rxq_get_buffer(adapter);
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if (unlikely(!skb))
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break;
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/* if the large packet bit is set in the rx queue
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* descriptor, the mss will be written by PHYP eight
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@ -1357,10 +1429,12 @@ static int ibmveth_poll(struct napi_struct *napi, int budget)
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if (rx_flush)
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ibmveth_flush_buffer(skb->data,
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length + offset);
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ibmveth_rxq_harvest_buffer(adapter, true);
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if (unlikely(ibmveth_rxq_harvest_buffer(adapter, true)))
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break;
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skb = new_skb;
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} else {
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ibmveth_rxq_harvest_buffer(adapter, false);
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if (unlikely(ibmveth_rxq_harvest_buffer(adapter, false)))
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break;
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skb_reserve(skb, offset);
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}
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@ -1407,7 +1481,10 @@ static int ibmveth_poll(struct napi_struct *napi, int budget)
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* then check once more to make sure we are done.
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*/
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lpar_rc = h_vio_signal(adapter->vdev->unit_address, VIO_IRQ_ENABLE);
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BUG_ON(lpar_rc != H_SUCCESS);
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if (WARN_ON(lpar_rc != H_SUCCESS)) {
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schedule_work(&adapter->work);
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goto out;
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}
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if (ibmveth_rxq_pending_buffer(adapter) && napi_schedule(napi)) {
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lpar_rc = h_vio_signal(adapter->vdev->unit_address,
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@ -1428,7 +1505,7 @@ static irqreturn_t ibmveth_interrupt(int irq, void *dev_instance)
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if (napi_schedule_prep(&adapter->napi)) {
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lpar_rc = h_vio_signal(adapter->vdev->unit_address,
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VIO_IRQ_DISABLE);
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BUG_ON(lpar_rc != H_SUCCESS);
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WARN_ON(lpar_rc != H_SUCCESS);
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__napi_schedule(&adapter->napi);
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}
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return IRQ_HANDLED;
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@ -1670,6 +1747,7 @@ static int ibmveth_probe(struct vio_dev *dev, const struct vio_device_id *id)
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adapter->vdev = dev;
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adapter->netdev = netdev;
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INIT_WORK(&adapter->work, ibmveth_reset);
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adapter->mcastFilterSize = be32_to_cpu(*mcastFilterSize_p);
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ibmveth_init_link_settings(netdev);
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@ -1762,6 +1840,8 @@ static void ibmveth_remove(struct vio_dev *dev)
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struct ibmveth_adapter *adapter = netdev_priv(netdev);
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int i;
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cancel_work_sync(&adapter->work);
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for (i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
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kobject_put(&adapter->rx_buff_pool[i].kobj);
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@ -1962,3 +2042,132 @@ static void __exit ibmveth_module_exit(void)
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module_init(ibmveth_module_init);
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module_exit(ibmveth_module_exit);
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#ifdef CONFIG_IBMVETH_KUNIT_TEST
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#include <kunit/test.h>
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/**
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* ibmveth_reset_kunit - reset routine for running in KUnit environment
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*
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* @w: pointer to work_struct embedded in adapter structure
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*
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* Context: Called in the KUnit environment. Does nothing.
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*
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* Return: void
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*/
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static void ibmveth_reset_kunit(struct work_struct *w)
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{
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netdev_dbg(NULL, "reset_kunit starting\n");
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netdev_dbg(NULL, "reset_kunit complete\n");
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}
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/**
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* ibmveth_remove_buffer_from_pool_test - unit test for some of
|
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* ibmveth_remove_buffer_from_pool
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* @test: pointer to kunit structure
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*
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* Tests the error returns from ibmveth_remove_buffer_from_pool.
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* ibmveth_remove_buffer_from_pool also calls WARN_ON, so dmesg should be
|
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* checked to see that these warnings happened.
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*
|
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* Return: void
|
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*/
|
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static void ibmveth_remove_buffer_from_pool_test(struct kunit *test)
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{
|
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struct ibmveth_adapter *adapter = kunit_kzalloc(test, sizeof(*adapter), GFP_KERNEL);
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struct ibmveth_buff_pool *pool;
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u64 correlator;
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KUNIT_ASSERT_NOT_ERR_OR_NULL(test, adapter);
|
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|
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INIT_WORK(&adapter->work, ibmveth_reset_kunit);
|
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|
||||
/* Set sane values for buffer pools */
|
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for (int i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
|
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ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
|
||||
pool_count[i], pool_size[i],
|
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pool_active[i]);
|
||||
|
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pool = &adapter->rx_buff_pool[0];
|
||||
pool->skbuff = kunit_kcalloc(test, pool->size, sizeof(void *), GFP_KERNEL);
|
||||
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pool->skbuff);
|
||||
|
||||
correlator = ((u64)IBMVETH_NUM_BUFF_POOLS << 32) | 0;
|
||||
KUNIT_EXPECT_EQ(test, -EINVAL, ibmveth_remove_buffer_from_pool(adapter, correlator, false));
|
||||
KUNIT_EXPECT_EQ(test, -EINVAL, ibmveth_remove_buffer_from_pool(adapter, correlator, true));
|
||||
|
||||
correlator = ((u64)0 << 32) | adapter->rx_buff_pool[0].size;
|
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KUNIT_EXPECT_EQ(test, -EINVAL, ibmveth_remove_buffer_from_pool(adapter, correlator, false));
|
||||
KUNIT_EXPECT_EQ(test, -EINVAL, ibmveth_remove_buffer_from_pool(adapter, correlator, true));
|
||||
|
||||
correlator = (u64)0 | 0;
|
||||
pool->skbuff[0] = NULL;
|
||||
KUNIT_EXPECT_EQ(test, -EFAULT, ibmveth_remove_buffer_from_pool(adapter, correlator, false));
|
||||
KUNIT_EXPECT_EQ(test, -EFAULT, ibmveth_remove_buffer_from_pool(adapter, correlator, true));
|
||||
|
||||
flush_work(&adapter->work);
|
||||
}
|
||||
|
||||
/**
|
||||
* ibmveth_rxq_get_buffer_test - unit test for ibmveth_rxq_get_buffer
|
||||
* @test: pointer to kunit structure
|
||||
*
|
||||
* Tests ibmveth_rxq_get_buffer. ibmveth_rxq_get_buffer also calls WARN_ON for
|
||||
* the NULL returns, so dmesg should be checked to see that these warnings
|
||||
* happened.
|
||||
*
|
||||
* Return: void
|
||||
*/
|
||||
static void ibmveth_rxq_get_buffer_test(struct kunit *test)
|
||||
{
|
||||
struct ibmveth_adapter *adapter = kunit_kzalloc(test, sizeof(*adapter), GFP_KERNEL);
|
||||
struct sk_buff *skb = kunit_kzalloc(test, sizeof(*skb), GFP_KERNEL);
|
||||
struct ibmveth_buff_pool *pool;
|
||||
|
||||
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, adapter);
|
||||
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, skb);
|
||||
|
||||
INIT_WORK(&adapter->work, ibmveth_reset_kunit);
|
||||
|
||||
adapter->rx_queue.queue_len = 1;
|
||||
adapter->rx_queue.index = 0;
|
||||
adapter->rx_queue.queue_addr = kunit_kzalloc(test, sizeof(struct ibmveth_rx_q_entry),
|
||||
GFP_KERNEL);
|
||||
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, adapter->rx_queue.queue_addr);
|
||||
|
||||
/* Set sane values for buffer pools */
|
||||
for (int i = 0; i < IBMVETH_NUM_BUFF_POOLS; i++)
|
||||
ibmveth_init_buffer_pool(&adapter->rx_buff_pool[i], i,
|
||||
pool_count[i], pool_size[i],
|
||||
pool_active[i]);
|
||||
|
||||
pool = &adapter->rx_buff_pool[0];
|
||||
pool->skbuff = kunit_kcalloc(test, pool->size, sizeof(void *), GFP_KERNEL);
|
||||
KUNIT_ASSERT_NOT_ERR_OR_NULL(test, pool->skbuff);
|
||||
|
||||
adapter->rx_queue.queue_addr[0].correlator = (u64)IBMVETH_NUM_BUFF_POOLS << 32 | 0;
|
||||
KUNIT_EXPECT_PTR_EQ(test, NULL, ibmveth_rxq_get_buffer(adapter));
|
||||
|
||||
adapter->rx_queue.queue_addr[0].correlator = (u64)0 << 32 | adapter->rx_buff_pool[0].size;
|
||||
KUNIT_EXPECT_PTR_EQ(test, NULL, ibmveth_rxq_get_buffer(adapter));
|
||||
|
||||
pool->skbuff[0] = skb;
|
||||
adapter->rx_queue.queue_addr[0].correlator = (u64)0 << 32 | 0;
|
||||
KUNIT_EXPECT_PTR_EQ(test, skb, ibmveth_rxq_get_buffer(adapter));
|
||||
|
||||
flush_work(&adapter->work);
|
||||
}
|
||||
|
||||
static struct kunit_case ibmveth_test_cases[] = {
|
||||
KUNIT_CASE(ibmveth_remove_buffer_from_pool_test),
|
||||
KUNIT_CASE(ibmveth_rxq_get_buffer_test),
|
||||
{}
|
||||
};
|
||||
|
||||
static struct kunit_suite ibmveth_test_suite = {
|
||||
.name = "ibmveth-kunit-test",
|
||||
.test_cases = ibmveth_test_cases,
|
||||
};
|
||||
|
||||
kunit_test_suite(ibmveth_test_suite);
|
||||
#endif
|
||||
|
|
|
|||
|
|
@ -134,38 +134,39 @@ struct ibmveth_rx_q {
|
|||
};
|
||||
|
||||
struct ibmveth_adapter {
|
||||
struct vio_dev *vdev;
|
||||
struct net_device *netdev;
|
||||
struct napi_struct napi;
|
||||
unsigned int mcastFilterSize;
|
||||
void * buffer_list_addr;
|
||||
void * filter_list_addr;
|
||||
void *tx_ltb_ptr[IBMVETH_MAX_QUEUES];
|
||||
unsigned int tx_ltb_size;
|
||||
dma_addr_t tx_ltb_dma[IBMVETH_MAX_QUEUES];
|
||||
dma_addr_t buffer_list_dma;
|
||||
dma_addr_t filter_list_dma;
|
||||
struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
|
||||
struct ibmveth_rx_q rx_queue;
|
||||
int rx_csum;
|
||||
int large_send;
|
||||
bool is_active_trunk;
|
||||
struct vio_dev *vdev;
|
||||
struct net_device *netdev;
|
||||
struct napi_struct napi;
|
||||
struct work_struct work;
|
||||
unsigned int mcastFilterSize;
|
||||
void *buffer_list_addr;
|
||||
void *filter_list_addr;
|
||||
void *tx_ltb_ptr[IBMVETH_MAX_QUEUES];
|
||||
unsigned int tx_ltb_size;
|
||||
dma_addr_t tx_ltb_dma[IBMVETH_MAX_QUEUES];
|
||||
dma_addr_t buffer_list_dma;
|
||||
dma_addr_t filter_list_dma;
|
||||
struct ibmveth_buff_pool rx_buff_pool[IBMVETH_NUM_BUFF_POOLS];
|
||||
struct ibmveth_rx_q rx_queue;
|
||||
int rx_csum;
|
||||
int large_send;
|
||||
bool is_active_trunk;
|
||||
|
||||
u64 fw_ipv6_csum_support;
|
||||
u64 fw_ipv4_csum_support;
|
||||
u64 fw_large_send_support;
|
||||
/* adapter specific stats */
|
||||
u64 replenish_task_cycles;
|
||||
u64 replenish_no_mem;
|
||||
u64 replenish_add_buff_failure;
|
||||
u64 replenish_add_buff_success;
|
||||
u64 rx_invalid_buffer;
|
||||
u64 rx_no_buffer;
|
||||
u64 tx_map_failed;
|
||||
u64 tx_send_failed;
|
||||
u64 tx_large_packets;
|
||||
u64 rx_large_packets;
|
||||
/* Ethtool settings */
|
||||
u64 fw_ipv6_csum_support;
|
||||
u64 fw_ipv4_csum_support;
|
||||
u64 fw_large_send_support;
|
||||
/* adapter specific stats */
|
||||
u64 replenish_task_cycles;
|
||||
u64 replenish_no_mem;
|
||||
u64 replenish_add_buff_failure;
|
||||
u64 replenish_add_buff_success;
|
||||
u64 rx_invalid_buffer;
|
||||
u64 rx_no_buffer;
|
||||
u64 tx_map_failed;
|
||||
u64 tx_send_failed;
|
||||
u64 tx_large_packets;
|
||||
u64 rx_large_packets;
|
||||
/* Ethtool settings */
|
||||
u8 duplex;
|
||||
u32 speed;
|
||||
};
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user