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GET /api/patches/657612/?format=api
{ "id": 657612, "url": "http://patchwork.ozlabs.org/api/patches/657612/?format=api", "web_url": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/1470811692-24574-2-git-send-email-gangfeng.huang@ni.com/", "project": { "id": 46, "url": "http://patchwork.ozlabs.org/api/projects/46/?format=api", "name": "Intel Wired Ethernet development", "link_name": "intel-wired-lan", "list_id": "intel-wired-lan.osuosl.org", "list_email": "intel-wired-lan@osuosl.org", "web_url": "", "scm_url": "", "webscm_url": "", "list_archive_url": "", "list_archive_url_format": "", "commit_url_format": "" }, "msgid": "<1470811692-24574-2-git-send-email-gangfeng.huang@ni.com>", "list_archive_url": null, "date": "2016-08-10T06:48:12", "name": "[net-next] igb: add function to set I210 transmit mode", "commit_ref": null, "pull_url": null, "state": "changes-requested", "archived": false, "hash": "851ff7ed68be8cdc237406ce783684ae2c170399", "submitter": { "id": 67513, "url": "http://patchwork.ozlabs.org/api/people/67513/?format=api", "name": "Gangfeng Huang", "email": "gangfeng.huang@ni.com" }, "delegate": { "id": 68, "url": "http://patchwork.ozlabs.org/api/users/68/?format=api", "username": "jtkirshe", "first_name": "Jeff", "last_name": "Kirsher", "email": "jeffrey.t.kirsher@intel.com" }, "mbox": "http://patchwork.ozlabs.org/project/intel-wired-lan/patch/1470811692-24574-2-git-send-email-gangfeng.huang@ni.com/mbox/", "series": [], "comments": "http://patchwork.ozlabs.org/api/patches/657612/comments/", "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/657612/checks/", "tags": {}, "related": [], "headers": { "Return-Path": "<intel-wired-lan-bounces@lists.osuosl.org>", "X-Original-To": [ "incoming@patchwork.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Delivered-To": [ "patchwork-incoming@bilbo.ozlabs.org", "intel-wired-lan@lists.osuosl.org" ], "Received": [ "from fraxinus.osuosl.org (smtp4.osuosl.org [140.211.166.137])\n\t(using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits))\n\t(No client certificate requested)\n\tby ozlabs.org (Postfix) with ESMTPS id 3s8MDZ3kQQz9sR9\n\tfor <incoming@patchwork.ozlabs.org>;\n\tWed, 10 Aug 2016 16:48:30 +1000 (AEST)", "from localhost (localhost [127.0.0.1])\n\tby fraxinus.osuosl.org (Postfix) with ESMTP id 186D1882D2;\n\tWed, 10 Aug 2016 06:48:29 +0000 (UTC)", "from fraxinus.osuosl.org ([127.0.0.1])\n\tby localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)\n\twith ESMTP id TRSjClkViLpm; Wed, 10 Aug 2016 06:48:26 +0000 (UTC)", "from ash.osuosl.org (ash.osuosl.org [140.211.166.34])\n\tby fraxinus.osuosl.org (Postfix) with ESMTP id E6AA6882AD;\n\tWed, 10 Aug 2016 06:48:26 +0000 (UTC)", "from whitealder.osuosl.org (smtp1.osuosl.org [140.211.166.138])\n\tby ash.osuosl.org (Postfix) with ESMTP id A4E9A1C1635\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tWed, 10 Aug 2016 06:48:25 +0000 (UTC)", "from localhost (localhost [127.0.0.1])\n\tby whitealder.osuosl.org (Postfix) with ESMTP id A207F8A871\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tWed, 10 Aug 2016 06:48:25 +0000 (UTC)", "from whitealder.osuosl.org ([127.0.0.1])\n\tby localhost (.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)\n\twith ESMTP id PjP2VNoHDi78 for <intel-wired-lan@lists.osuosl.org>;\n\tWed, 10 Aug 2016 06:48:24 +0000 (UTC)", "from ni.com (skprod2.natinst.com [130.164.80.23])\n\tby whitealder.osuosl.org (Postfix) with ESMTPS id BC2CD8A7D3\n\tfor <intel-wired-lan@lists.osuosl.org>;\n\tWed, 10 Aug 2016 06:48:24 +0000 (UTC)", "from us-aus-mgwout1.amer.corp.natinst.com\n\t(nb-snip2-1338.natinst.com [130.164.19.135])\n\tby us-aus-skprod2.natinst.com (8.15.0.59/8.15.0.59) with ESMTP id\n\tu7A6mN2q009450 for <intel-wired-lan@lists.osuosl.org>;\n\tWed, 10 Aug 2016 01:48:23 -0500", "from ni.com ([130.164.14.198])\n\tby us-aus-mgwout1.amer.corp.natinst.com (Lotus Domino Release\n\t8.5.3FP6 HF1218) with ESMTP id 2016081001482346-173291 ;\n\tWed, 10 Aug 2016 01:48:23 -0500 " ], "X-Virus-Scanned": [ "amavisd-new at osuosl.org", "amavisd-new at osuosl.org" ], "X-Greylist": "domain auto-whitelisted by SQLgrey-1.7.6", "From": "Gangfeng <gangfeng.huang@ni.com>", "To": "intel-wired-lan@lists.osuosl.org", "Date": "Wed, 10 Aug 2016 14:48:12 +0800", "Message-Id": "<1470811692-24574-2-git-send-email-gangfeng.huang@ni.com>", "X-Mailer": "git-send-email 2.7.2", "In-Reply-To": "<1470811692-24574-1-git-send-email-gangfeng.huang@ni.com>", "References": "<1470811692-24574-1-git-send-email-gangfeng.huang@ni.com>", "X-MIMETrack": "Itemize by SMTP Server on US-AUS-MGWOut1/AUS/H/NIC(Release\n\t8.5.3FP6 HF1218|December 12, 2014) at 08/10/2016 01:48:23 AM,\n\tSerialize by Router on US-AUS-MGWOut1/AUS/H/NIC(Release 8.5.3FP6\n\tHF1218|December 12, 2014) at 08/10/2016 01:48:24 AM,\n\tSerialize complete at 08/10/2016 01:48:24 AM", "X-Proofpoint-Virus-Version": "vendor=fsecure engine=2.50.10432:, ,\n\tdefinitions=2016-08-10_05:, , signatures=0", "Cc": "Gangfeng Huang <gangfeng.huang@ni.com>", "Subject": "[Intel-wired-lan] [net-next] igb: add function to set I210 transmit\n\tmode", "X-BeenThere": "intel-wired-lan@lists.osuosl.org", "X-Mailman-Version": "2.1.18-1", "Precedence": "list", "List-Id": "Intel Wired Ethernet Linux Kernel Driver Development\n\t<intel-wired-lan.lists.osuosl.org>", "List-Unsubscribe": "<http://lists.osuosl.org/mailman/options/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@lists.osuosl.org?subject=unsubscribe>", "List-Archive": "<http://lists.osuosl.org/pipermail/intel-wired-lan/>", "List-Post": "<mailto:intel-wired-lan@lists.osuosl.org>", "List-Help": "<mailto:intel-wired-lan-request@lists.osuosl.org?subject=help>", "List-Subscribe": "<http://lists.osuosl.org/mailman/listinfo/intel-wired-lan>, \n\t<mailto:intel-wired-lan-request@lists.osuosl.org?subject=subscribe>", "MIME-Version": "1.0", "Content-Type": "text/plain; charset=\"us-ascii\"", "Content-Transfer-Encoding": "7bit", "Errors-To": "intel-wired-lan-bounces@lists.osuosl.org", "Sender": "\"Intel-wired-lan\" <intel-wired-lan-bounces@lists.osuosl.org>" }, "content": "From: Gangfeng Huang <gangfeng.huang@ni.com>\n\nI210 supports two transmit modes, legacy and Qav. The transmit mode is\nconfigured in TQAVCTRL.QavMode register. Before this patch igb driver\nonly support legacy mode. This patch makes it possible to configure the\ntransmit mode.\n\nExample:\nGet the transmit mode:\n$ echo /sys/class/net/eth0/qav_mode\n0\nSet transmit mode to qav mode\n$ echo 1 > /sys/class/net/eth0/qav_mode\n\nTested:\nSetting /sys/class/net/eth0/qav_mode to Qav mode,\n 1) Switch back and forth between Qav mode and legacy mode\n 2) Send/recv packets in both mode.\n\nSigned-off-by: Gangfeng Huang <gangfeng.huang@ni.com>\n---\n drivers/net/ethernet/intel/igb/e1000_defines.h | 21 +++\n drivers/net/ethernet/intel/igb/e1000_regs.h | 7 +\n drivers/net/ethernet/intel/igb/igb.h | 5 +\n drivers/net/ethernet/intel/igb/igb_main.c | 178 ++++++++++++++++++++++++-\n 4 files changed, 209 insertions(+), 2 deletions(-)", "diff": "diff --git a/drivers/net/ethernet/intel/igb/e1000_defines.h b/drivers/net/ethernet/intel/igb/e1000_defines.h\nindex cf3846b..f13d6a7 100644\n--- a/drivers/net/ethernet/intel/igb/e1000_defines.h\n+++ b/drivers/net/ethernet/intel/igb/e1000_defines.h\n@@ -360,6 +360,7 @@\n #define MAX_JUMBO_FRAME_SIZE\t0x2600\n \n /* PBA constants */\n+#define E1000_PBA_32K 0x0020\n #define E1000_PBA_34K 0x0022\n #define E1000_PBA_64K 0x0040 /* 64KB */\n \n@@ -1028,4 +1029,24 @@\n #define E1000_VLAPQF_P_VALID(_n) (0x1 << (3 + (_n) * 4))\n #define E1000_VLAPQF_QUEUE_MASK 0x03\n \n+/* Queue mode, 0=strict, 1=SR mode */\n+#define E1000_TQAVCC_QUEUEMODE 0x80000000\n+/* Transmit mode, 0=legacy, 1=QAV */\n+#define E1000_TQAVCTRL_TXMODE 0x00000001\n+/* Report DMA time of tx packets */\n+#define E1000_TQAVCTRL_1588_STAT_EN 0x00000004\n+#define E1000_TQAVCTRL_DATA_FETCH_ARB 0x00000010 /* Data fetch arbitration */\n+#define E1000_TQAVCTRL_DATA_TRAN_ARB 0x00000100 /* Data tx arbitration */\n+#define E1000_TQAVCTRL_DATA_TRAN_TIM 0x00000200 /* Data launch time valid */\n+/* Stall SP to guarantee SR */\n+#define E1000_TQAVCTRL_SP_WAIT_SR 0x00000400\n+#define E1000_TQAVCTRL_FETCH_TM_SHIFT (16)\n+\n+#define E1000_TXPBSIZE_TX0PB_SHIFT 0\n+#define E1000_TXPBSIZE_TX1PB_SHIFT 6\n+#define E1000_TXPBSIZE_TX2PB_SHIFT 12\n+#define E1000_TXPBSIZE_TX3PB_SHIFT 18\n+\n+#define E1000_DTXMXPKTSZ_DEFAULT 0x00000098\n+\n #endif\ndiff --git a/drivers/net/ethernet/intel/igb/e1000_regs.h b/drivers/net/ethernet/intel/igb/e1000_regs.h\nindex 9b66b6f..7cffabc 100644\n--- a/drivers/net/ethernet/intel/igb/e1000_regs.h\n+++ b/drivers/net/ethernet/intel/igb/e1000_regs.h\n@@ -138,6 +138,12 @@\n #define E1000_FCRTC\t0x02170 /* Flow Control Rx high watermark */\n #define E1000_PCIEMISC\t0x05BB8 /* PCIE misc config register */\n \n+/* High credit registers where _n can be 0 or 1. */\n+#define E1000_TQAVHC(_n)\t(0x300C + 0x40 * (_n))\n+/* QAV Tx mode control registers where _n can be 0 or 1. */\n+#define E1000_TQAVCC(_n)\t(0x3004 + 0x40 * (_n))\n+#define E1000_TQAVCTRL\t0x3570 /* Tx Qav Control registers */\n+\n /* TX Rate Limit Registers */\n #define E1000_RTTDQSEL\t0x3604 /* Tx Desc Plane Queue Select - WO */\n #define E1000_RTTBCNRM\t0x3690 /* Tx BCN Rate-scheduler MMW */\n@@ -204,6 +210,7 @@\n #define E1000_TDFT 0x03418 /* TX Data FIFO Tail - RW */\n #define E1000_TDFHS 0x03420 /* TX Data FIFO Head Saved - RW */\n #define E1000_TDFPC 0x03430 /* TX Data FIFO Packet Count - RW */\n+#define E1000_DTXMXPKT 0x0355C /* DMA TX Maximum Packet Size */\n #define E1000_DTXCTL 0x03590 /* DMA TX Control - RW */\n #define E1000_CRCERRS 0x04000 /* CRC Error Count - R/clr */\n #define E1000_ALGNERRC 0x04004 /* Alignment Error Count - R/clr */\ndiff --git a/drivers/net/ethernet/intel/igb/igb.h b/drivers/net/ethernet/intel/igb/igb.h\nindex 3e24e92..78782f9 100644\n--- a/drivers/net/ethernet/intel/igb/igb.h\n+++ b/drivers/net/ethernet/intel/igb/igb.h\n@@ -139,6 +139,9 @@ struct vf_data_storage {\n /* this is the size past which hardware will drop packets when setting LPE=0 */\n #define MAXIMUM_ETHERNET_VLAN_SIZE 1522\n \n+/* In qav mode, the maximum frame size is 1536 */\n+#define IGB_MAX_QAV_FRAME_SIZE 1536\n+\n /* Supported Rx Buffer Sizes */\n #define IGB_RXBUFFER_256\t256\n #define IGB_RXBUFFER_2048\t2048\n@@ -521,6 +524,8 @@ struct igb_adapter {\n \t/* lock for RX network flow classification filter */\n \tspinlock_t nfc_lock;\n \tbool etype_bitmap[MAX_ETYPE_FILTER];\n+\n+\tbool qav_mode;\n };\n \n /* flags controlling PTP/1588 function */\ndiff --git a/drivers/net/ethernet/intel/igb/igb_main.c b/drivers/net/ethernet/intel/igb/igb_main.c\nindex af75eac..1684a75 100644\n--- a/drivers/net/ethernet/intel/igb/igb_main.c\n+++ b/drivers/net/ethernet/intel/igb/igb_main.c\n@@ -179,6 +179,17 @@ static void igb_check_vf_rate_limit(struct igb_adapter *);\n static void igb_nfc_filter_exit(struct igb_adapter *adapter);\n static void igb_nfc_filter_restore(struct igb_adapter *adapter);\n \n+/* Switch qav mode and legacy mode by sysfs*/\n+static void igb_setup_qav_mode(struct igb_adapter *adapter);\n+static void igb_setup_normal_mode(struct igb_adapter *adapter);\n+static ssize_t igb_get_qav_mode(struct device *dev,\n+\t\t\t\tstruct device_attribute *attr, char *buf);\n+static ssize_t igb_set_qav_mode(struct device *dev,\n+\t\t\t\tstruct device_attribute *attr,\n+\t\t\t\tconst char *buf, size_t count);\n+static DEVICE_ATTR(qav_mode, S_IRUGO | S_IWUSR,\n+\t\t igb_get_qav_mode, igb_set_qav_mode);\n+\n #ifdef CONFIG_PCI_IOV\n static int igb_vf_configure(struct igb_adapter *adapter, int vf);\n static int igb_pci_enable_sriov(struct pci_dev *dev, int num_vfs);\n@@ -1609,6 +1620,11 @@ static void igb_configure(struct igb_adapter *adapter)\n \n \tigb_restore_vlan(adapter);\n \n+\tif (adapter->qav_mode)\n+\t\tigb_setup_qav_mode(adapter);\n+\telse\n+\t\tigb_setup_normal_mode(adapter);\n+\n \tigb_setup_tctl(adapter);\n \tigb_setup_mrqc(adapter);\n \tigb_setup_rctl(adapter);\n@@ -1887,8 +1903,10 @@ void igb_reset(struct igb_adapter *adapter)\n \t\tpba = rd32(E1000_RXPBS);\n \t\tpba &= E1000_RXPBS_SIZE_MASK_82576;\n \t\tbreak;\n-\tcase e1000_82575:\n \tcase e1000_i210:\n+\t\tpba = (adapter->qav_mode) ? E1000_PBA_32K : E1000_PBA_34K;\n+\t\tbreak;\n+\tcase e1000_82575:\n \tcase e1000_i211:\n \tdefault:\n \t\tpba = E1000_PBA_34K;\n@@ -2366,6 +2384,7 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)\n \thw = &adapter->hw;\n \thw->back = adapter;\n \tadapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);\n+\tadapter->qav_mode = false;\n \n \terr = -EIO;\n \tadapter->io_addr = pci_iomap(pdev, 0, 0);\n@@ -2643,6 +2662,15 @@ static int igb_probe(struct pci_dev *pdev, const struct pci_device_id *ent)\n \tif (err)\n \t\tgoto err_register;\n \n+\tif (hw->mac.type == e1000_i210) {\n+\t\terr = sysfs_create_file(&netdev->dev.kobj,\n+\t\t\t\t\t&dev_attr_qav_mode.attr);\n+\t\tif (err) {\n+\t\t\tnetdev_err(netdev, \"error creating sysfs file\\n\");\n+\t\t\tgoto err_register;\n+\t\t}\n+\t}\n+\n \t/* carrier off reporting is important to ethtool even BEFORE open */\n \tnetif_carrier_off(netdev);\n \n@@ -2923,6 +2951,8 @@ static void igb_remove(struct pci_dev *pdev)\n #ifdef CONFIG_PCI_IOV\n \tigb_disable_sriov(pdev);\n #endif\n+\tif (hw->mac.type == e1000_i210)\n+\t\tsysfs_remove_file(&netdev->dev.kobj, &dev_attr_qav_mode.attr);\n \n \tunregister_netdev(netdev);\n \n@@ -3007,7 +3037,12 @@ static void igb_init_queue_configuration(struct igb_adapter *adapter)\n \t\tbreak;\n \t}\n \n-\tadapter->rss_queues = min_t(u32, max_rss_queues, num_online_cpus());\n+\t/* For QAV mode, always enable all queues */\n+\tif (adapter->qav_mode)\n+\t\tadapter->rss_queues = max_rss_queues;\n+\telse\n+\t\tadapter->rss_queues = min_t(u32, max_rss_queues,\n+\t\t\t\t\t num_online_cpus());\n \n \tigb_set_flag_queue_pairs(adapter, max_rss_queues);\n }\n@@ -5413,6 +5448,10 @@ static int igb_change_mtu(struct net_device *netdev, int new_mtu)\n \t\treturn -EINVAL;\n \t}\n \n+\t/* For i210 Qav mode, the max frame is 1536 */\n+\tif (adapter->qav_mode && max_frame > IGB_MAX_QAV_FRAME_SIZE)\n+\t\treturn -EINVAL;\n+\n #define MAX_STD_JUMBO_FRAME_SIZE 9238\n \tif (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {\n \t\tdev_err(&pdev->dev, \"MTU > 9216 not supported.\\n\");\n@@ -8351,4 +8390,139 @@ static void igb_nfc_filter_restore(struct igb_adapter *adapter)\n \n \tspin_unlock(&adapter->nfc_lock);\n }\n+\n+static void igb_setup_qav_mode(struct igb_adapter *adapter)\n+{\n+\tstruct e1000_hw *hw = &adapter->hw;\n+\tu32\ttqavctrl;\n+\tu32\ttqavcc0, tqavcc1;\n+\tu32\ttqavhc0, tqavhc1;\n+\tu32\ttxpbsize;\n+\n+\t/* reconfigure the tx packet buffer allocation */\n+\ttxpbsize = (8);\n+\ttxpbsize |= (8) << E1000_TXPBSIZE_TX1PB_SHIFT;\n+\ttxpbsize |= (4) << E1000_TXPBSIZE_TX2PB_SHIFT;\n+\ttxpbsize |= (4) << E1000_TXPBSIZE_TX3PB_SHIFT;\n+\n+\twr32(E1000_TXPBS, txpbsize);\n+\n+\t/* In Qav mode, the maximum sized frames of 1536 bytes */\n+\twr32(E1000_DTXMXPKT, IGB_MAX_QAV_FRAME_SIZE / 64);\n+\n+\t/* The I210 implements 4 queues, up to two queues are dedicated\n+\t * for stream reservation or priority, strict priority queuing\n+\t * while SR queue are subjected to launch time policy\n+\t */\n+\n+\ttqavcc0 = E1000_TQAVCC_QUEUEMODE; /* no idle slope */\n+\ttqavcc1 = E1000_TQAVCC_QUEUEMODE; /* no idle slope */\n+\ttqavhc0 = 0xFFFFFFFF; /* unlimited credits */\n+\ttqavhc1 = 0xFFFFFFFF; /* unlimited credits */\n+\n+\twr32(E1000_TQAVCC(0), tqavcc0);\n+\twr32(E1000_TQAVCC(1), tqavcc1);\n+\twr32(E1000_TQAVHC(0), tqavhc0);\n+\twr32(E1000_TQAVHC(1), tqavhc1);\n+\n+\ttqavctrl = E1000_TQAVCTRL_TXMODE |\n+\t\t\tE1000_TQAVCTRL_DATA_FETCH_ARB |\n+\t\t\tE1000_TQAVCTRL_DATA_TRAN_TIM |\n+\t\t\tE1000_TQAVCTRL_SP_WAIT_SR;\n+\n+\t/* Default to a 10 usec prefetch delta from launch time - time for\n+\t * a 1500 byte rx frame to be received over the PCIe Gen1 x1 link.\n+\t */\n+\ttqavctrl |= (10 << 5) << E1000_TQAVCTRL_FETCH_TM_SHIFT;\n+\n+\twr32(E1000_TQAVCTRL, tqavctrl);\n+}\n+\n+static void igb_setup_normal_mode(struct igb_adapter *adapter)\n+{\n+\tstruct e1000_hw *hw = &adapter->hw;\n+\n+\twr32(E1000_TXPBS, I210_TXPBSIZE_DEFAULT);\n+\twr32(E1000_DTXMXPKT, E1000_DTXMXPKTSZ_DEFAULT);\n+\twr32(E1000_TQAVCTRL, 0);\n+}\n+\n+static int igb_change_mode(struct igb_adapter *adapter, int request_mode)\n+{\n+\tstruct net_device *netdev;\n+\tint err = 0;\n+\tint current_mode;\n+\n+\tif (!adapter) {\n+\t\tdev_err(&adapter->pdev->dev, \"map to unbound device!\\n\");\n+\t\treturn -ENOENT;\n+\t}\n+\n+\tcurrent_mode = adapter->qav_mode;\n+\n+\tif (request_mode == current_mode)\n+\t\treturn 0;\n+\n+\tnetdev = adapter->netdev;\n+\n+\trtnl_lock();\n+\n+\tif (netif_running(netdev))\n+\t\tigb_close(netdev);\n+\telse\n+\t\tigb_reset(adapter);\n+\n+\tigb_clear_interrupt_scheme(adapter);\n+\n+\tadapter->qav_mode = request_mode;\n+\n+\tigb_init_queue_configuration(adapter);\n+\n+\tif (igb_init_interrupt_scheme(adapter, true)) {\n+\t\tdev_err(&adapter->pdev->dev,\n+\t\t\t\"Unable to allocate memory for queues\\n\");\n+\t\terr = -ENOMEM;\n+\t\tgoto err_out;\n+\t}\n+\n+\tif (netif_running(netdev))\n+\t\tigb_open(netdev);\n+err_out:\n+\trtnl_unlock();\n+\treturn err;\n+}\n+\n+static ssize_t igb_get_qav_mode(struct device *dev,\n+\t\t\t\tstruct device_attribute *attr, char *buf)\n+{\n+\tstruct net_device *netdev = to_net_dev(dev);\n+\tstruct igb_adapter *adapter = netdev_priv(netdev);\n+\n+\treturn scnprintf(buf, PAGE_SIZE, \"%d\\n\", adapter->qav_mode);\n+}\n+\n+static ssize_t igb_set_qav_mode(struct device *dev,\n+\t\t\t\tstruct device_attribute *attr,\n+\t\t\t\tconst char *buf, size_t len)\n+{\n+\tstruct net_device *netdev = to_net_dev(dev);\n+\tstruct igb_adapter *adapter = netdev_priv(netdev);\n+\tint request_mode, err;\n+\n+\tif (!capable(CAP_NET_ADMIN))\n+\t\treturn -EPERM;\n+\n+\tif (kstrtoint(buf, 0, &request_mode) < 0)\n+\t\treturn -EINVAL;\n+\n+\tif (request_mode != 0 && request_mode != 1)\n+\t\treturn -EINVAL;\n+\n+\terr = igb_change_mode(adapter, request_mode);\n+\tif (err)\n+\t\treturn err;\n+\n+\treturn len;\n+}\n+\n /* igb_main.c */\n", "prefixes": [ "net-next" ] }