From patchwork Thu Jul 2 08:21:32 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kishon Vijay Abraham I X-Patchwork-Id: 11638199 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id C86A613B4 for ; Thu, 2 Jul 2020 08:25:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 992EF20737 for ; Thu, 2 Jul 2020 08:25:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=ti.com header.i=@ti.com header.b="aQhF8M4Y" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728524AbgGBIXE (ORCPT ); Thu, 2 Jul 2020 04:23:04 -0400 Received: from fllv0015.ext.ti.com ([198.47.19.141]:34528 "EHLO fllv0015.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728508AbgGBIXD (ORCPT ); Thu, 2 Jul 2020 04:23:03 -0400 Received: from fllv0035.itg.ti.com ([10.64.41.0]) by fllv0015.ext.ti.com (8.15.2/8.15.2) with ESMTP id 0628MrUY017271; Thu, 2 Jul 2020 03:22:53 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ti.com; s=ti-com-17Q1; t=1593678173; bh=YsmvRj9z3gDFXuXNfVPm9r+zKmA28FIRtmnlRZD7Iho=; h=From:To:CC:Subject:Date:In-Reply-To:References; b=aQhF8M4YLxWDJO7BAd979sAKCntR8LcDEH/T8ayhukRGiDPHrETsOhRPjcrluzmWm KncENH+ifMKjs11GVKalH0lButeSiGxFUJyiNNV9fvafOI5iZ1jGjbKg7KOkbRRHjM mJ+xggI6dPyPAAFTcCkOs6J/9X1eeV4X56HdqQ9Q= Received: from DLEE102.ent.ti.com (dlee102.ent.ti.com [157.170.170.32]) by fllv0035.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0628MruT086357; Thu, 2 Jul 2020 03:22:53 -0500 Received: from DLEE108.ent.ti.com (157.170.170.38) by DLEE102.ent.ti.com (157.170.170.32) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Thu, 2 Jul 2020 03:22:52 -0500 Received: from lelv0327.itg.ti.com (10.180.67.183) by DLEE108.ent.ti.com (157.170.170.38) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Thu, 2 Jul 2020 03:22:52 -0500 Received: from a0393678ub.india.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by lelv0327.itg.ti.com (8.15.2/8.15.2) with ESMTP id 0628LiYN006145; Thu, 2 Jul 2020 03:22:47 -0500 From: Kishon Vijay Abraham I To: Ohad Ben-Cohen , Bjorn Andersson , Jon Mason , Dave Jiang , Allen Hubbe , Lorenzo Pieralisi , Bjorn Helgaas , "Michael S. Tsirkin" , Jason Wang , Paolo Bonzini , Stefan Hajnoczi , Stefano Garzarella CC: , , , , , , , Subject: [RFC PATCH 11/22] rpmsg: virtio_rpmsg_bus: Move generic rpmsg structure to rpmsg_internal.h Date: Thu, 2 Jul 2020 13:51:32 +0530 Message-ID: <20200702082143.25259-12-kishon@ti.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200702082143.25259-1-kishon@ti.com> References: <20200702082143.25259-1-kishon@ti.com> MIME-Version: 1.0 X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 Sender: linux-remoteproc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-remoteproc@vger.kernel.org No functional change intended. Move generic rpmsg structures like "struct rpmsg_hdr", "struct rpmsg_ns_msg" and "struct rpmsg_as_msg", its associated flags and generic macros to rpmsg_internal.h. This is in preparation to add VHOST based vhost_rpmsg_bus.c which will use the same structures and macros. Signed-off-by: Kishon Vijay Abraham I --- drivers/rpmsg/rpmsg_internal.h | 120 +++++++++++++++++++++++++++++++ drivers/rpmsg/virtio_rpmsg_bus.c | 120 ------------------------------- 2 files changed, 120 insertions(+), 120 deletions(-) diff --git a/drivers/rpmsg/rpmsg_internal.h b/drivers/rpmsg/rpmsg_internal.h index 39b3a5caf242..69d9c9579b50 100644 --- a/drivers/rpmsg/rpmsg_internal.h +++ b/drivers/rpmsg/rpmsg_internal.h @@ -15,6 +15,126 @@ #include #include +/* The feature bitmap for virtio rpmsg */ +#define VIRTIO_RPMSG_F_NS 0 /* RP supports name service notifications */ +#define VIRTIO_RPMSG_F_AS 1 /* RP supports address service notifications */ + +/** + * struct rpmsg_hdr - common header for all rpmsg messages + * @src: source address + * @dst: destination address + * @reserved: reserved for future use + * @len: length of payload (in bytes) + * @flags: message flags + * @data: @len bytes of message payload data + * + * Every message sent(/received) on the rpmsg bus begins with this header. + */ +struct rpmsg_hdr { + u32 src; + u32 dst; + u32 reserved; + u16 len; + u16 flags; + u8 data[0]; +} __packed; + +/** + * struct rpmsg_ns_msg - dynamic name service announcement message + * @name: name of remote service that is published + * @addr: address of remote service that is published + * @flags: indicates whether service is created or destroyed + * + * This message is sent across to publish a new service, or announce + * about its removal. When we receive these messages, an appropriate + * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe() + * or ->remove() handler of the appropriate rpmsg driver will be invoked + * (if/as-soon-as one is registered). + */ +struct rpmsg_ns_msg { + char name[RPMSG_NAME_SIZE]; + u32 addr; + u32 flags; +} __packed; + +/** + * struct rpmsg_as_msg - dynamic address service announcement message + * @name: name of the created channel + * @dst: destination address to be used by the backend rpdev + * @src: source address of the backend rpdev (the one that sent name service + * announcement message) + * @flags: indicates whether service is created or destroyed + * + * This message is sent (by virtio_rpmsg_bus) when a new channel is created + * in response to name service announcement message by backend rpdev to create + * a new channel. This sends the allocated source address for the channel + * (destination address for the backend rpdev) to the backend rpdev. + */ +struct rpmsg_as_msg { + char name[RPMSG_NAME_SIZE]; + u32 dst; + u32 src; + u32 flags; +} __packed; + +/** + * enum rpmsg_ns_flags - dynamic name service announcement flags + * + * @RPMSG_NS_CREATE: a new remote service was just created + * @RPMSG_NS_DESTROY: a known remote service was just destroyed + */ +enum rpmsg_ns_flags { + RPMSG_NS_CREATE = 0, + RPMSG_NS_DESTROY = 1, + RPMSG_AS_ANNOUNCE = 2, +}; + +/** + * enum rpmsg_as_flags - dynamic address service announcement flags + * + * @RPMSG_AS_ASSIGN: address has been assigned to the newly created channel + * @RPMSG_AS_FREE: assigned address is freed from the channel and no longer can + * be used + */ +enum rpmsg_as_flags { + RPMSG_AS_ASSIGN = 1, + RPMSG_AS_FREE = 2, +}; + +/* + * We're allocating buffers of 512 bytes each for communications. The + * number of buffers will be computed from the number of buffers supported + * by the vring, upto a maximum of 512 buffers (256 in each direction). + * + * Each buffer will have 16 bytes for the msg header and 496 bytes for + * the payload. + * + * This will utilize a maximum total space of 256KB for the buffers. + * + * We might also want to add support for user-provided buffers in time. + * This will allow bigger buffer size flexibility, and can also be used + * to achieve zero-copy messaging. + * + * Note that these numbers are purely a decision of this driver - we + * can change this without changing anything in the firmware of the remote + * processor. + */ +#define MAX_RPMSG_NUM_BUFS (512) +#define MAX_RPMSG_BUF_SIZE (512) + +/* + * Local addresses are dynamically allocated on-demand. + * We do not dynamically assign addresses from the low 1024 range, + * in order to reserve that address range for predefined services. + */ +#define RPMSG_RESERVED_ADDRESSES (1024) + +/* Address 53 is reserved for advertising remote services */ +#define RPMSG_NS_ADDR (53) + +/* Address 54 is reserved for advertising address services */ +#define RPMSG_AS_ADDR (54) + #define to_rpmsg_device(d) container_of(d, struct rpmsg_device, dev) #define to_rpmsg_driver(d) container_of(d, struct rpmsg_driver, drv) diff --git a/drivers/rpmsg/virtio_rpmsg_bus.c b/drivers/rpmsg/virtio_rpmsg_bus.c index 19d930c9fc2c..f91143b25af7 100644 --- a/drivers/rpmsg/virtio_rpmsg_bus.c +++ b/drivers/rpmsg/virtio_rpmsg_bus.c @@ -69,92 +69,6 @@ struct virtproc_info { struct rpmsg_endpoint *ns_ept; }; -/* The feature bitmap for virtio rpmsg */ -#define VIRTIO_RPMSG_F_NS 0 /* RP supports name service notifications */ -#define VIRTIO_RPMSG_F_AS 1 /* RP supports address service notifications */ - -/** - * struct rpmsg_hdr - common header for all rpmsg messages - * @src: source address - * @dst: destination address - * @reserved: reserved for future use - * @len: length of payload (in bytes) - * @flags: message flags - * @data: @len bytes of message payload data - * - * Every message sent(/received) on the rpmsg bus begins with this header. - */ -struct rpmsg_hdr { - u32 src; - u32 dst; - u32 reserved; - u16 len; - u16 flags; - u8 data[0]; -} __packed; - -/** - * struct rpmsg_ns_msg - dynamic name service announcement message - * @name: name of remote service that is published - * @addr: address of remote service that is published - * @flags: indicates whether service is created or destroyed - * - * This message is sent across to publish a new service, or announce - * about its removal. When we receive these messages, an appropriate - * rpmsg channel (i.e device) is created/destroyed. In turn, the ->probe() - * or ->remove() handler of the appropriate rpmsg driver will be invoked - * (if/as-soon-as one is registered). - */ -struct rpmsg_ns_msg { - char name[RPMSG_NAME_SIZE]; - u32 addr; - u32 flags; -} __packed; - -/** - * struct rpmsg_as_msg - dynamic address service announcement message - * @name: name of the created channel - * @dst: destination address to be used by the backend rpdev - * @src: source address of the backend rpdev (the one that sent name service - * announcement message) - * @flags: indicates whether service is created or destroyed - * - * This message is sent (by virtio_rpmsg_bus) when a new channel is created - * in response to name service announcement message by backend rpdev to create - * a new channel. This sends the allocated source address for the channel - * (destination address for the backend rpdev) to the backend rpdev. - */ -struct rpmsg_as_msg { - char name[RPMSG_NAME_SIZE]; - u32 dst; - u32 src; - u32 flags; -} __packed; - -/** - * enum rpmsg_ns_flags - dynamic name service announcement flags - * - * @RPMSG_NS_CREATE: a new remote service was just created - * @RPMSG_NS_DESTROY: a known remote service was just destroyed - */ -enum rpmsg_ns_flags { - RPMSG_NS_CREATE = 0, - RPMSG_NS_DESTROY = 1, - RPMSG_AS_ANNOUNCE = 2, -}; - -/** - * enum rpmsg_as_flags - dynamic address service announcement flags - * - * @RPMSG_AS_ASSIGN: address has been assigned to the newly created channel - * @RPMSG_AS_FREE: assigned address is freed from the channel and no longer can - * be used - */ -enum rpmsg_as_flags { - RPMSG_AS_ASSIGN = 1, - RPMSG_AS_FREE = 2, -}; - /** * @vrp: the remote processor this channel belongs to */ @@ -167,40 +81,6 @@ struct virtio_rpmsg_channel { #define to_virtio_rpmsg_channel(_rpdev) \ container_of(_rpdev, struct virtio_rpmsg_channel, rpdev) -/* - * We're allocating buffers of 512 bytes each for communications. The - * number of buffers will be computed from the number of buffers supported - * by the vring, upto a maximum of 512 buffers (256 in each direction). - * - * Each buffer will have 16 bytes for the msg header and 496 bytes for - * the payload. - * - * This will utilize a maximum total space of 256KB for the buffers. - * - * We might also want to add support for user-provided buffers in time. - * This will allow bigger buffer size flexibility, and can also be used - * to achieve zero-copy messaging. - * - * Note that these numbers are purely a decision of this driver - we - * can change this without changing anything in the firmware of the remote - * processor. - */ -#define MAX_RPMSG_NUM_BUFS (512) -#define MAX_RPMSG_BUF_SIZE (512) - -/* - * Local addresses are dynamically allocated on-demand. - * We do not dynamically assign addresses from the low 1024 range, - * in order to reserve that address range for predefined services. - */ -#define RPMSG_RESERVED_ADDRESSES (1024) - -/* Address 53 is reserved for advertising remote services */ -#define RPMSG_NS_ADDR (53) - -/* Address 54 is reserved for advertising address services */ -#define RPMSG_AS_ADDR (54) - static void virtio_rpmsg_destroy_ept(struct rpmsg_endpoint *ept); static int virtio_rpmsg_send(struct rpmsg_endpoint *ept, void *data, int len); static int virtio_rpmsg_sendto(struct rpmsg_endpoint *ept, void *data, int len,