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a=rsa-sha256; c=relaxed/relaxed; d=amazon.com; i=@amazon.com; q=dns/txt; s=amazoncorp2; t=1768812376; x=1800348376; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=R9oS2nKM1IPBYxWxTXCOu7kJf4dDn6+iSczw0BdZD6s=; b=C5QeoQSdCDYs57xgumk8uGvy2/SuJW9b7Hu6b/jZV56JAD/xJ7k9r1Z5 V4hZ5kkE+XnChSO76++g+QamUPeSXxpXk5msHVUpt4LJ60Uv8Cg4CbF2R EK52tmpI3x9+fL+2NtvYKS+RFLGL7qnEHLvI45e6YMGsfFUaBxYYSTgDS pyEasYFTbmqsePuOaPiI9NIYf+KH8E3vI6gDM8DxJvtx2WX//vlCqFA0x oDYlLD+BBTpvvBDrnwVdHTFUPPQsyHTAd9u5tHRzSNb4ITKKQ4Ho8YlIw +PFm+d62T3zuJJew6kbUvJNP0fn7rLu9vKbSVm/AALeb42OXuKfGiFw6/ Q==; X-Mailman-Original-Authentication-Results: smtp4.osuosl.org; dmarc=pass (p=quarantine dis=none) header.from=amazon.com X-Mailman-Original-Authentication-Results: smtp4.osuosl.org; dkim=pass (2048-bit key, unprotected) header.d=amazon.com header.i=@amazon.com header.a=rsa-sha256 header.s=amazoncorp2 header.b=C5QeoQSd Subject: [Intel-wired-lan] [PATCH iwl-next v3 1/3] igb: prepare for RSS key get/set support X-BeenThere: intel-wired-lan@osuosl.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Intel Wired Ethernet Linux Kernel Driver Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-wired-lan-bounces@osuosl.org Sender: "Intel-wired-lan" Store the RSS key inside struct igb_adapter and introduce the igb_write_rss_key() helper function. This allows the driver to program the E1000 registers using a persistent RSS key, instead of using a stack-local buffer in igb_setup_mrqc(). Signed-off-by: Takashi Kozu --- drivers/net/ethernet/intel/igb/igb.h | 3 +++ drivers/net/ethernet/intel/igb/igb_ethtool.c | 21 ++++++++++++++++++++ drivers/net/ethernet/intel/igb/igb_main.c | 8 ++++---- 3 files changed, 28 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h index 0fff1df81b7b..8c9b02058cec 100644 --- a/drivers/net/ethernet/intel/igb/igb.h +++ b/drivers/net/ethernet/intel/igb/igb.h @@ -495,6 +495,7 @@ struct hwmon_buff { #define IGB_N_PEROUT 2 #define IGB_N_SDP 4 #define IGB_RETA_SIZE 128 +#define IGB_RSS_KEY_SIZE 40 enum igb_filter_match_flags { IGB_FILTER_FLAG_ETHER_TYPE = 0x1, @@ -655,6 +656,7 @@ struct igb_adapter { struct i2c_client *i2c_client; u32 rss_indir_tbl_init; u8 rss_indir_tbl[IGB_RETA_SIZE]; + u8 rss_key[IGB_RSS_KEY_SIZE]; unsigned long link_check_timeout; int copper_tries; @@ -735,6 +737,7 @@ void igb_down(struct igb_adapter *); void igb_reinit_locked(struct igb_adapter *); void igb_reset(struct igb_adapter *); int igb_reinit_queues(struct igb_adapter *); +void igb_write_rss_key(struct igb_adapter *adapter); void igb_write_rss_indir_tbl(struct igb_adapter *); int igb_set_spd_dplx(struct igb_adapter *, u32, u8); int igb_setup_tx_resources(struct igb_ring *); diff --git a/drivers/net/ethernet/intel/igb/igb_ethtool.c b/drivers/net/ethernet/intel/igb/igb_ethtool.c index 10e2445e0ded..5107b0de4fa3 100644 --- a/drivers/net/ethernet/intel/igb/igb_ethtool.c +++ b/drivers/net/ethernet/intel/igb/igb_ethtool.c @@ -3016,6 +3016,27 @@ static int igb_set_rxnfc(struct net_device *dev, struct ethtool_rxnfc *cmd) return ret; } +/** + * igb_write_rss_key - Program the RSS key into device registers + * @adapter: board private structure + * + * Write the RSS key stored in adapter->rss_key to the E1000 hardware registers. + * Each 32-bit chunk of the key is read using get_unaligned_le32() and written + * to the appropriate register. + */ +void igb_write_rss_key(struct igb_adapter *adapter) +{ + ASSERT_RTNL(); + + struct e1000_hw *hw = &adapter->hw; + + for (int i = 0; i < IGB_RSS_KEY_SIZE / 4; i++) { + u32 val = get_unaligned_le32(&adapter->rss_key[i * 4]); + + wr32(E1000_RSSRK(i), val); + } +} + static int igb_get_eee(struct net_device *netdev, struct ethtool_keee *edata) { struct igb_adapter *adapter = netdev_priv(netdev); diff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c index 85f9589cc568..568f491053ce 100644 --- a/drivers/net/ethernet/intel/igb/igb_main.c +++ b/drivers/net/ethernet/intel/igb/igb_main.c @@ -4050,6 +4050,9 @@ static int igb_sw_init(struct igb_adapter *adapter) pci_read_config_word(pdev, PCI_COMMAND, &hw->bus.pci_cmd_word); + /* init RSS key */ + netdev_rss_key_fill(adapter->rss_key, sizeof(adapter->rss_key)); + /* set default ring sizes */ adapter->tx_ring_count = IGB_DEFAULT_TXD; adapter->rx_ring_count = IGB_DEFAULT_RXD; @@ -4525,11 +4528,8 @@ static void igb_setup_mrqc(struct igb_adapter *adapter) struct e1000_hw *hw = &adapter->hw; u32 mrqc, rxcsum; u32 j, num_rx_queues; - u32 rss_key[10]; - netdev_rss_key_fill(rss_key, sizeof(rss_key)); - for (j = 0; j < 10; j++) - wr32(E1000_RSSRK(j), rss_key[j]); + igb_write_rss_key(adapter); num_rx_queues = adapter->rss_queues; -- 2.52.0