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[209.51.188.17]) by mx.google.com with ESMTPS id o142si260398wmd.1.2019.01.28.10.05.15 for (version=TLS1 cipher=AES128-SHA bits=128/128); Mon, 28 Jan 2019 10:05:15 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; Authentication-Results: mx.google.com; dkim=fail header.i=@gmail.com header.s=20161025 header.b=quTQ5Lf8; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom="qemu-devel-bounces+patch=linaro.org@nongnu.org" Received: from localhost ([127.0.0.1]:36239 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1goBHW-0005uD-Ft for patch@linaro.org; Mon, 28 Jan 2019 13:05:14 -0500 Received: from eggs.gnu.org ([209.51.188.92]:36897) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1goBEC-00038N-SB for qemu-devel@nongnu.org; Mon, 28 Jan 2019 13:01:50 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1goB8U-0005ss-OE for qemu-devel@nongnu.org; Mon, 28 Jan 2019 12:56:04 -0500 Received: from mail-io1-xd42.google.com ([2607:f8b0:4864:20::d42]:44473) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1goB8U-0005fY-IY for qemu-devel@nongnu.org; Mon, 28 Jan 2019 12:55:54 -0500 Received: by mail-io1-xd42.google.com with SMTP id r200so14206443iod.11 for ; Mon, 28 Jan 2019 09:55:26 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=AoLcNOQ30aKzN3oO2kA4DzR6j6MGF6e7733YDW7t8Z0=; b=quTQ5Lf8vi5SjOnCrGezV0whDhcQPXm+staV9MAsDPW8febVenQnNZMwW1n5IFORg6 wvg4Vx3jMROg94HuvwsdJ2qzMD2+fFoEQo6esoeSK8ahRO5/j6/dNHR43Z09K+C0XsU7 nixwj73N/oXQLyPbxN6puvtMWX0JUh8bNAhCwuJoYDBl8dpyuJIhwZIYERcTLHchDAnW FE6AulUW1gVoe1Z47riekwZ2B6/OfLSc+eHSMsPGNMdGeDoxDUmSXDbS0VCAUW+H6pYE tKi4vY3GaEzkYwvpJ/VC8wx95JfE7FhybKU79pY57WpUFmg5+HSAAFc+BKYRWuvA+s6V 4G9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=AoLcNOQ30aKzN3oO2kA4DzR6j6MGF6e7733YDW7t8Z0=; b=ZKLGyy8SJrg8l/t9Vos9p3N0bSxfWJjFUZ2Qjt867MOMRkt/2mERJrz3NUAQppPe09 cRSDP48NMvlCL9ZbMA0uzad4Y6VizFf5LowmCfrBw5QXLwOjAFueklubvZR3xSrFpxi3 amvvGa7PBEbHs1WAJU0vQJXQJK1CS7c+t3W9mPq5Ow8adXFt2sFOhScS1uv0XX6ljswD IULJVry2Ip3MbOH3ulOxoGpkE+pEWyw9AwTZ7zgc4eecUtbEJqTg67Ov316EzRUZkGtG 41ejscuqVtmNempiYqjFVAgDa6DQ/XMAR56HZO8ra0IxKXFmxGH1hrjQ9abkxm7eTV9H k7rw== X-Gm-Message-State: AHQUAuaTRTCssJNxWsUadwM2TkgI2RoMoUsR8EmhG3KYPZSp6CJxgybl FmWGdaZmiVSHDVKBdJRh0g== X-Received: by 2002:a6b:c8c9:: with SMTP id y192mr12602184iof.183.1548698125651; Mon, 28 Jan 2019 09:55:25 -0800 (PST) Received: from serve.minyard.net ([47.184.128.64]) by smtp.gmail.com with ESMTPSA id e21sm54357itc.6.2019.01.28.09.55.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 28 Jan 2019 09:55:22 -0800 (PST) Received: from t430.minyard.net (unknown [IPv6:2001:470:b8f6:1b:c8f8:7971:e432:a838]) by serve.minyard.net (Postfix) with ESMTPA id BAB12BAD; Mon, 28 Jan 2019 11:55:17 -0600 (CST) Received: by t430.minyard.net (Postfix, from userid 1000) id 5EE82301154; Mon, 28 Jan 2019 11:55:09 -0600 (CST) From: minyard@acm.org To: qemu-devel@nongnu.org, "Dr . David Alan Gilbert" Date: Mon, 28 Jan 2019 11:54:53 -0600 Message-Id: <20190128175458.27255-15-minyard@acm.org> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20190128175458.27255-1-minyard@acm.org> References: <20190128175458.27255-1-minyard@acm.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::d42 Subject: [Qemu-devel] [PATCH v4 14/19] i2c:smbus_slave: Add an SMBus vmstate structure X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Peter Maydell , Paolo Bonzini , Corey Minyard , Corey Minyard , "Michael S . Tsirkin" Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" From: Corey Minyard There is no vmstate handling for SMBus, so no device sitting on SMBus can have a state transfer that works reliably. So add it. Signed-off-by: Corey Minyard Cc: Paolo Bonzini Cc: Michael S. Tsirkin Cc: Dr. David Alan Gilbert Reviewed-by: Dr. David Alan Gilbert --- hw/i2c/smbus_slave.c | 18 ++++++++++++++++++ include/hw/i2c/smbus_slave.h | 24 +++++++++++++++++++++--- 2 files changed, 39 insertions(+), 3 deletions(-) -- 2.17.1 diff --git a/hw/i2c/smbus_slave.c b/hw/i2c/smbus_slave.c index 5b3046f6a3..9a2d314d1a 100644 --- a/hw/i2c/smbus_slave.c +++ b/hw/i2c/smbus_slave.c @@ -201,6 +201,24 @@ static void smbus_device_class_init(ObjectClass *klass, void *data) sc->send = smbus_i2c_send; } +bool smbus_vmstate_needed(SMBusDevice *dev) +{ + return dev->mode != SMBUS_IDLE; +} + +const VMStateDescription vmstate_smbus_device = { + .name = TYPE_SMBUS_DEVICE, + .version_id = 1, + .minimum_version_id = 1, + .fields = (VMStateField[]) { + VMSTATE_I2C_SLAVE(i2c, SMBusDevice), + VMSTATE_INT32(mode, SMBusDevice), + VMSTATE_INT32(data_len, SMBusDevice), + VMSTATE_UINT8_ARRAY(data_buf, SMBusDevice, SMBUS_DATA_MAX_LEN), + VMSTATE_END_OF_LIST() + } +}; + static const TypeInfo smbus_device_type_info = { .name = TYPE_SMBUS_DEVICE, .parent = TYPE_I2C_SLAVE, diff --git a/include/hw/i2c/smbus_slave.h b/include/hw/i2c/smbus_slave.h index 79050fb92d..ebe068304e 100644 --- a/include/hw/i2c/smbus_slave.h +++ b/include/hw/i2c/smbus_slave.h @@ -69,14 +69,32 @@ typedef struct SMBusDeviceClass uint8_t (*receive_byte)(SMBusDevice *dev); } SMBusDeviceClass; +#define SMBUS_DATA_MAX_LEN 34 /* command + len + 32 bytes of data. */ + struct SMBusDevice { /* The SMBus protocol is implemented on top of I2C. */ I2CSlave i2c; /* Remaining fields for internal use only. */ - int mode; - int data_len; - uint8_t data_buf[34]; /* command + len + 32 bytes of data. */ + int32_t mode; + int32_t data_len; + uint8_t data_buf[SMBUS_DATA_MAX_LEN]; }; +extern const VMStateDescription vmstate_smbus_device; + +#define VMSTATE_SMBUS_DEVICE(_field, _state) { \ + .name = (stringify(_field)), \ + .size = sizeof(SMBusDevice), \ + .vmsd = &vmstate_smbus_device, \ + .flags = VMS_STRUCT, \ + .offset = vmstate_offset_value(_state, _field, SMBusDevice), \ +} + +/* + * Users should call this in their .needed functions to know if the + * SMBus slave data needs to be transferred. + */ +bool smbus_vmstate_needed(SMBusDevice *dev); + #endif