From 8c0543adca2bb17808e46a24eb6e6247181a10b1 Mon Sep 17 00:00:00 2001 From: Nathan Fontenot Date: Fri, 26 May 2017 10:31:06 -0400 Subject: [PATCH] ibmvnic: Reset tx/rx pools on driver reset When resetting the ibmvnic driver there is not a need to release and re-allocate the resources for the tx and rx pools. These resources can just be reset to avoid the re-allocations. Signed-off-by: Nathan Fontenot Signed-off-by: David S. Miller --- drivers/net/ethernet/ibm/ibmvnic.c | 71 +++++++++++++++++++++++++++++++++++--- 1 file changed, 67 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/ibm/ibmvnic.c b/drivers/net/ethernet/ibm/ibmvnic.c index b9b0c69..5661a04 100644 --- a/drivers/net/ethernet/ibm/ibmvnic.c +++ b/drivers/net/ethernet/ibm/ibmvnic.c @@ -163,6 +163,16 @@ static long h_reg_sub_crq(unsigned long unit_address, unsigned long token, return rc; } +static void reset_long_term_buff(struct ibmvnic_adapter *adapter, + struct ibmvnic_long_term_buff *ltb) +{ + memset(ltb->buff, 0, ltb->size); + + init_completion(&adapter->fw_done); + send_request_map(adapter, ltb->addr, ltb->size, ltb->map_id); + wait_for_completion(&adapter->fw_done); +} + static int alloc_long_term_buff(struct ibmvnic_adapter *adapter, struct ibmvnic_long_term_buff *ltb, int size) { @@ -352,6 +362,32 @@ static int init_stats_token(struct ibmvnic_adapter *adapter) return 0; } +static int reset_rx_pools(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_rx_pool *rx_pool; + int rx_scrqs; + int i, j; + + rx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_rxadd_subcrqs); + for (i = 0; i < rx_scrqs; i++) { + rx_pool = &adapter->rx_pool[i]; + + reset_long_term_buff(adapter, &rx_pool->long_term_buff); + + for (j = 0; j < rx_pool->size; j++) + rx_pool->free_map[j] = j; + + memset(rx_pool->rx_buff, 0, + rx_pool->size * sizeof(struct ibmvnic_rx_buff)); + + atomic_set(&rx_pool->available, 0); + rx_pool->next_alloc = 0; + rx_pool->next_free = 0; + } + + return 0; +} + static void release_rx_pools(struct ibmvnic_adapter *adapter) { struct ibmvnic_rx_pool *rx_pool; @@ -453,6 +489,32 @@ static int init_rx_pools(struct net_device *netdev) return 0; } +static int reset_tx_pools(struct ibmvnic_adapter *adapter) +{ + struct ibmvnic_tx_pool *tx_pool; + int tx_scrqs; + int i, j; + + tx_scrqs = be32_to_cpu(adapter->login_rsp_buf->num_txsubm_subcrqs); + for (i = 0; i < tx_scrqs; i++) { + tx_pool = &adapter->tx_pool[i]; + + reset_long_term_buff(adapter, &tx_pool->long_term_buff); + + memset(tx_pool->tx_buff, 0, + adapter->req_tx_entries_per_subcrq * + sizeof(struct ibmvnic_tx_buff)); + + for (j = 0; j < adapter->req_tx_entries_per_subcrq; j++) + tx_pool->free_map[j] = j; + + tx_pool->consumer_index = 0; + tx_pool->producer_index = 0; + } + + return 0; +} + static void release_tx_pools(struct ibmvnic_adapter *adapter) { struct ibmvnic_tx_pool *tx_pool; @@ -1258,7 +1320,6 @@ static int do_reset(struct ibmvnic_adapter *adapter, */ adapter->state = VNIC_PROBED; - release_resources(adapter); release_sub_crqs(adapter); rc = ibmvnic_init(adapter); @@ -1277,9 +1338,11 @@ static int do_reset(struct ibmvnic_adapter *adapter, return 0; } - rtnl_lock(); - rc = init_resources(adapter); - rtnl_unlock(); + rc = reset_tx_pools(adapter); + if (rc) + return rc; + + rc = reset_rx_pools(adapter); if (rc) return rc; -- 2.7.4