From patchwork Wed May 15 09:50:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mengyuan Lou X-Patchwork-Id: 13665060 X-Patchwork-Delegate: kuba@kernel.org Received: from bg1.exmail.qq.com (bg1.exmail.qq.com [114.132.65.219]) (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 5A3AC5A0F8 for ; Wed, 15 May 2024 10:09:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.132.65.219 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715767751; cv=none; b=G8Xp/RylmDcUODyW+8/WDQNNLI+RVh+rmaDJ6ncvrGqbZWnAXMwhftn7MX6x++/VjrBe3zUJJzuRssjPj0mA6kRwdJCvEGKEhW6bhM76zo+yzjpypcX+3us4NzVio5W4mdPE2StzPMHmNch2L4PHSgkVtZhmu6DnofessUJZ8xM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715767751; c=relaxed/simple; bh=5yo6OVv1estZvfaTiJ898X7nfzsC8QtzQYrWaSBMMqQ=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=S3WQC0yilW/7WtsUBL3MY0nOPmMSnNcULtXjESAs+k3iQyg5YVTneyMljkdF1EGS08lMS0vhhicJ01P1bvMMoy9GL8ib4NqClIxFG6ZRaeiEGQMNb9RVA8naNVPyD6BJPDiXAS89Py0f0ndvWvNBtaVP9hX8DXenhHwYqYSpHMY= 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=114.132.65.219 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: bizesmtp80t1715767726tgq7xbn3 X-QQ-Originating-IP: O8pDezD814XHH1vW3bCi3yL4JmETrvuqc6PwPdL0q4g= Received: from localhost.localdomain ( [125.120.144.133]) by bizesmtp.qq.com (ESMTP) with id ; Wed, 15 May 2024 18:08:43 +0800 (CST) X-QQ-SSF: 01400000000000O0Z000000A0000000 X-QQ-FEAT: KdN0SWBFoH6e17zNBD/6iU5hEs6RrgJICBicvgK+XGcRq89BctfZJcCkTpZZw FDIQJvxNRFBBDQtJi8rdRNDacdQfH39HAu69uiRlNIRigweA8dzF4Fl4G3V5qHQV/a5uN5A 1lEndFgSl90jmcV/FMtd12bI0jmLGrskp5DyeUh5ItnE2FgEo8gC8yMV11sjPKhv+EFIl8E MgQaPnENo4miKJyLQENtxp0r2qX0grK9Gu54Ji0/wlRCORDWaMAGSZytHZPQjh1v/OsjktT 8fO0fZg+LyI1AF55g6om20Kyv9JUfZ1UFJsG//Lzf1kG7+dF6+k69URHc0x4Fwec0vx4Aaq bglxmDJWfSUKGx1zLa/NaozLq+htKVw2SxyXV9yJ9RlpsRFl60NeOF+rR3KNyXNdfunTjYy FgRISPoxqGxvkdu0kFarB3KX8t0zG/Wj X-QQ-GoodBg: 2 X-BIZMAIL-ID: 8321308435623724875 From: Mengyuan Lou To: netdev@vger.kernel.org Cc: jiawenwu@trustnetic.com, duanqiangwen@net-swift.com, Mengyuan Lou Subject: [PATCH net-next v3 1/6] net: libwx: Add malibox api for wangxun pf drivers Date: Wed, 15 May 2024 17:50:04 +0800 Message-ID: X-Mailer: git-send-email 2.43.2 In-Reply-To: <20240515100830.32920-1-mengyuanlou@net-swift.com> References: <20240515100830.32920-1-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:qybglogicsvrgz:qybglogicsvrgz6a-1 X-Patchwork-Delegate: kuba@kernel.org 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 | 191 +++++++++++++++++++ drivers/net/ethernet/wangxun/libwx/wx_mbx.h | 32 ++++ drivers/net/ethernet/wangxun/libwx/wx_type.h | 5 + 4 files changed, 229 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..26842043630b --- /dev/null +++ b/drivers/net/ethernet/wangxun/libwx/wx_mbx.c @@ -0,0 +1,191 @@ +// 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 SUCCESS if we obtained the mailbox lock + **/ +static int wx_obtain_mbx_lock_pf(struct wx *wx, u16 vf) +{ + int ret = -EBUSY; + 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) { + ret = 0; + break; + } + udelay(10); + } + + if (ret) + wx_err(wx, "Failed to obtain mailbox lock for PF%d", vf); + + return ret; +} + +static int wx_check_for_bit_pf(struct wx *wx, u32 mask, int index) +{ + u32 mbvficr = rd32(wx, WX_MBVFICR(index)); + int ret = -EBUSY; + + if (mbvficr & mask) { + ret = 0; + wr32(wx, WX_MBVFICR(index), mask); + } + + return ret; +} + +/** + * wx_check_for_ack_pf - checks to see if the VF has ACKed + * @wx: pointer to the HW structure + * @vf: the VF index + * + * returns SUCCESS if the VF has set the Status bit or else ERR_MBX + **/ +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); +} +EXPORT_SYMBOL(wx_check_for_ack_pf); + +/** + * wx_check_for_msg_pf - checks to see if the VF has sent mail + * @wx: pointer to the HW structure + * @vf: the VF index + * + * returns SUCCESS if the VF has set the Status bit or else ERR_MBX + **/ +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); +} +EXPORT_SYMBOL(wx_check_for_msg_pf); + +/** + * 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 + * + * returns SUCCESS if it successfully copied message into the buffer + **/ +int wx_write_mbx_pf(struct wx *wx, u32 *msg, u16 size, u16 vf) +{ + struct wx_mbx_info *mbx = &wx->mbx; + int ret, i; + + if (size > mbx->size) { + wx_err(wx, "Invalid mailbox message size %d", size); + ret = -EINVAL; + goto out_no_write; + } + + /* lock the mailbox to prevent pf/vf race condition */ + ret = wx_obtain_mbx_lock_pf(wx, vf); + if (ret) + goto out_no_write; + + /* 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); + +out_no_write: + return ret; +} +EXPORT_SYMBOL(wx_write_mbx_pf); + +/** + * 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 + * + * This function copies a message from the mailbox buffer to the caller's + * memory buffer. The presumption is that the caller knows that there was + * a message due to a VF request so no polling for message is needed. + **/ +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 */ + 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) + goto out_no_read; + + /* copy the message to the mailbox memory buffer */ + 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); +out_no_read: + return ret; +} +EXPORT_SYMBOL(wx_read_mbx_pf); + +/** + * wx_check_for_rst_pf - checks to see if the VF has reset + * @wx: pointer to the HW structure + * @vf: the VF index + * + * returns SUCCESS if the VF has set the Status bit or else ERR_MBX + **/ +int wx_check_for_rst_pf(struct wx *wx, u16 vf) +{ + u32 reg_offset = vf / 32; + u32 vf_shift = vf % 32; + int ret = -EBUSY; + u32 vflre = 0; + + vflre = rd32(wx, WX_VFLRE(reg_offset)); + + if (vflre & BIT(vf_shift)) { + ret = 0; + wr32(wx, WX_VFLREC(reg_offset), BIT(vf_shift)); + } + + return ret; +} +EXPORT_SYMBOL(wx_check_for_rst_pf); 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 1fdeb464d5f4..f29ac955dc83 100644 --- a/drivers/net/ethernet/wangxun/libwx/wx_type.h +++ b/drivers/net/ethernet/wangxun/libwx/wx_type.h @@ -674,6 +674,10 @@ struct wx_bus_info { u16 device; }; +struct wx_mbx_info { + u16 size; +}; + struct wx_thermal_sensor_data { s16 temp; s16 alarm_thresh; @@ -990,6 +994,7 @@ 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;