From patchwork Fri Jul 26 10:02:52 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mengyuan Lou X-Patchwork-Id: 13742555 X-Patchwork-Delegate: kuba@kernel.org Received: from smtpbgsg2.qq.com (smtpbgsg2.qq.com [54.254.200.128]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D4554225AF for ; Fri, 26 Jul 2024 10:03:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=54.254.200.128 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721988215; cv=none; b=tqg0MucmfHCc5IxUs/w8v+ahdiiZ7yxzElruKjoKo5wqO1nKabSd2a1FL5OcjkQbY5GaGWKhz08nCNkQ1bdtdkZlyUKybOfmjXI5+M5jppLemyMPtfttfp2CDV8kkjiv9xSUmTM/cLCALHO0W8EFIz6okYjvutzyabrnmDPCWCg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1721988215; c=relaxed/simple; bh=XGQFYd4TTTsO0ZdoGpaj9PokQ4NvXa5G6NXFVoL92e8=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=SfFa0JQnNrijxbDNsHJmUhWbya5EoL13AGqRkf6i0+0Kii1f4PXQqQ0hlfvv/LrBo5qp8kJDgF74sRAM44bdhGNM9EwTBFPQ1zabZNNO5gv9rMhCfmUOdPymbpMFlX5wDKLmXVCEvcmdR+b8ALF+PsDIZijNwflisEzBTGPRKyM= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=net-swift.com; spf=pass smtp.mailfrom=net-swift.com; arc=none smtp.client-ip=54.254.200.128 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=net-swift.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=net-swift.com X-QQ-mid: bizesmtp81t1721988201ts08xi7z X-QQ-Originating-IP: DROWQN4n7DmZklOG7AkkAuTOlsM5KV1Rrb9LYnN7smc= Received: from localhost.localdomain ( [122.231.252.211]) by bizesmtp.qq.com (ESMTP) with id ; Fri, 26 Jul 2024 18:03:19 +0800 (CST) X-QQ-SSF: 0001000000000000000000000000000 X-QQ-GoodBg: 2 X-BIZMAIL-ID: 5499599651212820689 From: Mengyuan Lou To: netdev@vger.kernel.org Cc: jiawenwu@net-swift.com, Mengyuan Lou Subject: [RFC PATCH net-next v5 01/10] net: libwx: Add malibox api for wangxun pf drivers Date: Fri, 26 Jul 2024 18:02:52 +0800 Message-ID: <0A63D5305A7F0B97+20240726100301.21416-2-mengyuanlou@net-swift.com> X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240726100301.21416-1-mengyuanlou@net-swift.com> References: <20240726100301.21416-1-mengyuanlou@net-swift.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-QQ-SENDSIZE: 520 Feedback-ID: bizesmtp:net-swift.com:qybglogicsvrsz:qybglogicsvrsz4a-0 X-Patchwork-Delegate: kuba@kernel.org X-Patchwork-State: RFC Implements the mailbox interfaces for wangxun pf drivers ngbe and txgbe. Signed-off-by: Mengyuan Lou --- drivers/net/ethernet/wangxun/libwx/Makefile | 2 +- drivers/net/ethernet/wangxun/libwx/wx_mbx.c | 175 +++++++++++++++++++ drivers/net/ethernet/wangxun/libwx/wx_mbx.h | 32 ++++ drivers/net/ethernet/wangxun/libwx/wx_type.h | 8 + 4 files changed, 216 insertions(+), 1 deletion(-) create mode 100644 drivers/net/ethernet/wangxun/libwx/wx_mbx.c create mode 100644 drivers/net/ethernet/wangxun/libwx/wx_mbx.h diff --git a/drivers/net/ethernet/wangxun/libwx/Makefile b/drivers/net/ethernet/wangxun/libwx/Makefile index 42ccd6e4052e..913a978c9032 100644 --- a/drivers/net/ethernet/wangxun/libwx/Makefile +++ b/drivers/net/ethernet/wangxun/libwx/Makefile @@ -4,4 +4,4 @@ obj-$(CONFIG_LIBWX) += libwx.o -libwx-objs := wx_hw.o wx_lib.o wx_ethtool.o +libwx-objs := wx_hw.o wx_lib.o wx_ethtool.o wx_mbx.o diff --git a/drivers/net/ethernet/wangxun/libwx/wx_mbx.c b/drivers/net/ethernet/wangxun/libwx/wx_mbx.c new file mode 100644 index 000000000000..5062ddb2ce39 --- /dev/null +++ b/drivers/net/ethernet/wangxun/libwx/wx_mbx.c @@ -0,0 +1,175 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2015 - 2024 Beijing WangXun Technology Co., Ltd. */ +#include +#include "wx_type.h" +#include "wx_mbx.h" + +/** + * wx_obtain_mbx_lock_pf - obtain mailbox lock + * @wx: pointer to the HW structure + * @vf: the VF index + * + * return: return 0 on success and -EBUSY on failure + **/ +static int wx_obtain_mbx_lock_pf(struct wx *wx, u16 vf) +{ + int count = 5; + u32 mailbox; + + while (count--) { + /* Take ownership of the buffer */ + wr32(wx, WX_PXMAILBOX(vf), WX_PXMAILBOX_PFU); + + /* reserve mailbox for vf use */ + mailbox = rd32(wx, WX_PXMAILBOX(vf)); + if (mailbox & WX_PXMAILBOX_PFU) + return 0; + else if (count != 1) + udelay(10); + } + wx_err(wx, "Failed to obtain mailbox lock for PF%d", vf); + + return -EBUSY; +} + +static int wx_check_for_bit_pf(struct wx *wx, u32 mask, int index) +{ + u32 mbvficr = rd32(wx, WX_MBVFICR(index)); + + if ((mbvficr & mask) == 0) + return -EBUSY; + wr32(wx, WX_MBVFICR(index), mask); + + return 0; +} + +/** + * wx_check_for_ack_pf - checks to see if the VF has acked + * @wx: pointer to the HW structure + * @vf: the VF index + * + * return: return 0 if the VF has set the status bit or else -EBUSY + **/ +int wx_check_for_ack_pf(struct wx *wx, u16 vf) +{ + u32 index = vf / 16, vf_bit = vf % 16; + + return wx_check_for_bit_pf(wx, + FIELD_PREP(WX_MBVFICR_VFACK_MASK, + BIT(vf_bit)), + index); +} + +/** + * wx_check_for_msg_pf - checks to see if the VF has sent mail + * @wx: pointer to the HW structure + * @vf: the VF index + * + * return: return 0 if the VF has got req bit or else -EBUSY + **/ +int wx_check_for_msg_pf(struct wx *wx, u16 vf) +{ + u32 index = vf / 16, vf_bit = vf % 16; + + return wx_check_for_bit_pf(wx, + FIELD_PREP(WX_MBVFICR_VFREQ_MASK, + BIT(vf_bit)), + index); +} + +/** + * wx_write_mbx_pf - Places a message in the mailbox + * @wx: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @vf: the VF index + * + * return: return 0 on success and -EINVAL/-EBUSY on failure + **/ +int wx_write_mbx_pf(struct wx *wx, u32 *msg, u16 size, u16 vf) +{ + struct wx_mbx_info *mbx = &wx->mbx; + int ret, i; + + /* mbx->size is up to 15 */ + if (size > mbx->size) { + wx_err(wx, "Invalid mailbox message size %d", size); + return -EINVAL; + } + + /* lock the mailbox to prevent pf/vf race condition */ + ret = wx_obtain_mbx_lock_pf(wx, vf); + if (ret) + return ret; + + /* flush msg and acks as we are overwriting the message buffer */ + wx_check_for_msg_pf(wx, vf); + wx_check_for_ack_pf(wx, vf); + + /* copy the caller specified message to the mailbox memory buffer */ + for (i = 0; i < size; i++) + wr32a(wx, WX_PXMBMEM(vf), i, msg[i]); + + /* Interrupt VF to tell it a message has been sent and release buffer*/ + /* set mirrored mailbox flags */ + wr32a(wx, WX_PXMBMEM(vf), WX_VXMAILBOX_SIZE, WX_PXMAILBOX_STS); + wr32(wx, WX_PXMAILBOX(vf), WX_PXMAILBOX_STS); + + return 0; +} + +/** + * wx_read_mbx_pf - Read a message from the mailbox + * @wx: pointer to the HW structure + * @msg: The message buffer + * @size: Length of buffer + * @vf: the VF index + * + * return: return 0 on success and -EBUSY on failure + **/ +int wx_read_mbx_pf(struct wx *wx, u32 *msg, u16 size, u16 vf) +{ + struct wx_mbx_info *mbx = &wx->mbx; + int ret; + u16 i; + + /* limit read to size of mailbox and mbx->size is up to 15 */ + if (size > mbx->size) + size = mbx->size; + + /* lock the mailbox to prevent pf/vf race condition */ + ret = wx_obtain_mbx_lock_pf(wx, vf); + if (ret) + return ret; + + for (i = 0; i < size; i++) + msg[i] = rd32a(wx, WX_PXMBMEM(vf), i); + + /* Acknowledge the message and release buffer */ + /* set mirrored mailbox flags */ + wr32a(wx, WX_PXMBMEM(vf), WX_VXMAILBOX_SIZE, WX_PXMAILBOX_ACK); + wr32(wx, WX_PXMAILBOX(vf), WX_PXMAILBOX_ACK); + + return 0; +} + +/** + * wx_check_for_rst_pf - checks to see if the VF has reset + * @wx: pointer to the HW structure + * @vf: the VF index + * + * return: return 0 on success and -EBUSY on failure + **/ +int wx_check_for_rst_pf(struct wx *wx, u16 vf) +{ + u32 reg_offset = WX_VF_REG_OFFSET(vf); + u32 vf_shift = WX_VF_IND_SHIFT(vf); + u32 vflre = 0; + + vflre = rd32(wx, WX_VFLRE(reg_offset)); + if (!(vflre & BIT(vf_shift))) + return -EBUSY; + wr32(wx, WX_VFLREC(reg_offset), BIT(vf_shift)); + + return 0; +} diff --git a/drivers/net/ethernet/wangxun/libwx/wx_mbx.h b/drivers/net/ethernet/wangxun/libwx/wx_mbx.h new file mode 100644 index 000000000000..1579096fb6ad --- /dev/null +++ b/drivers/net/ethernet/wangxun/libwx/wx_mbx.h @@ -0,0 +1,32 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Copyright (c) 2015 - 2024 Beijing WangXun Technology Co., Ltd. */ +#ifndef _WX_MBX_H_ +#define _WX_MBX_H_ + +#define WX_VXMAILBOX_SIZE 15 + +/* PF Registers */ +#define WX_PXMAILBOX(i) (0x600 + (4 * (i))) /* i=[0,63] */ +#define WX_PXMAILBOX_STS BIT(0) /* Initiate message send to VF */ +#define WX_PXMAILBOX_ACK BIT(1) /* Ack message recv'd from VF */ +#define WX_PXMAILBOX_PFU BIT(3) /* PF owns the mailbox buffer */ + +#define WX_PXMBMEM(i) (0x5000 + (64 * (i))) /* i=[0,63] */ + +#define WX_VFLRE(i) (0x4A0 + (4 * (i))) /* i=[0,1] */ +#define WX_VFLREC(i) (0x4A8 + (4 * (i))) /* i=[0,1] */ + +/* SR-IOV specific macros */ +#define WX_MBVFICR(i) (0x480 + (4 * (i))) /* i=[0,3] */ +#define WX_MBVFICR_VFREQ_MASK GENMASK(15, 0) +#define WX_MBVFICR_VFACK_MASK GENMASK(31, 16) + +#define WX_VT_MSGINFO_MASK GENMASK(23, 16) + +int wx_write_mbx_pf(struct wx *wx, u32 *msg, u16 size, u16 vf); +int wx_read_mbx_pf(struct wx *wx, u32 *msg, u16 size, u16 vf); +int wx_check_for_rst_pf(struct wx *wx, u16 mbx_id); +int wx_check_for_msg_pf(struct wx *wx, u16 mbx_id); +int wx_check_for_ack_pf(struct wx *wx, u16 mbx_id); + +#endif /* _WX_MBX_H_ */ diff --git a/drivers/net/ethernet/wangxun/libwx/wx_type.h b/drivers/net/ethernet/wangxun/libwx/wx_type.h index 1d57b047817b..5b9d5fd7033d 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_type.h +++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h @@ -20,6 +20,9 @@ #define WX_PCI_LINK_STATUS 0xB2 /**************** Global Registers ****************************/ +#define WX_VF_REG_OFFSET(_v) ((_v) >> 5) +#define WX_VF_IND_SHIFT(_v) ((_v) & 0x1f) + /* chip control Registers */ #define WX_MIS_PWR 0x10000 #define WX_MIS_RST 0x1000C @@ -707,6 +710,10 @@ struct wx_bus_info { u16 device; }; +struct wx_mbx_info { + u16 size; +}; + struct wx_thermal_sensor_data { s16 temp; s16 alarm_thresh; @@ -1046,6 +1053,7 @@ struct wx { struct pci_dev *pdev; struct net_device *netdev; struct wx_bus_info bus; + struct wx_mbx_info mbx; struct wx_mac_info mac; enum em_mac_type mac_type; enum sp_media_type media_type;