From patchwork Wed Aug 31 00:34:23 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Long Li X-Patchwork-Id: 12960206 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id ECC4CECAAD4 for ; Wed, 31 Aug 2022 00:34:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230010AbiHaAet (ORCPT ); Tue, 30 Aug 2022 20:34:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231366AbiHaAeo (ORCPT ); Tue, 30 Aug 2022 20:34:44 -0400 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 2503CA572E; Tue, 30 Aug 2022 17:34:43 -0700 (PDT) Received: by linux.microsoft.com (Postfix, from userid 1004) id D85A72045E29; Tue, 30 Aug 2022 17:34:42 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com D85A72045E29 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxonhyperv.com; s=default; t=1661906082; bh=CFHN87ly0+j708CVJCpFlb5ZQDU4qBWyS2Tw0re/Ttk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:Reply-To:From; b=rzyXSl7tsKf8p3TUXc+NsRIh+I1zvaZ074K4T4p0edcC0VXybBqDFNUHwDGnUvxDI V6vV7HGVcfg/Xu+f08x+HLWaYtvS43ILDIXuINEXPkjjS2U7wohhKCpxCDuPzVct0N 0u5CXTr/czq1Ao8qPeearT64C4bYpP5wrf3m2oQo= From: longli@linuxonhyperv.com To: "K. Y. Srinivasan" , Haiyang Zhang , Stephen Hemminger , Wei Liu , Dexuan Cui , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Jason Gunthorpe , Leon Romanovsky , edumazet@google.com, shiraz.saleem@intel.com, Ajay Sharma Cc: linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-rdma@vger.kernel.org, Long Li Subject: [Patch v5 04/12] net: mana: Add functions for allocating doorbell page from GDMA Date: Tue, 30 Aug 2022 17:34:23 -0700 Message-Id: <1661906071-29508-5-git-send-email-longli@linuxonhyperv.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1661906071-29508-1-git-send-email-longli@linuxonhyperv.com> References: <1661906071-29508-1-git-send-email-longli@linuxonhyperv.com> Reply-To: longli@microsoft.com Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org From: Long Li The RDMA device needs to allocate doorbell pages for each user context. Implement those functions and expose them for use by the RDMA driver. Reviewed-by: Dexuan Cui Signed-off-by: Long Li Acked-by: Haiyang Zhang --- Change log: v4: use EXPORT_SYMBOL_NS drivers/net/ethernet/microsoft/mana/gdma.h | 29 ++++++++++ .../net/ethernet/microsoft/mana/gdma_main.c | 56 +++++++++++++++++++ 2 files changed, 85 insertions(+) diff --git a/drivers/net/ethernet/microsoft/mana/gdma.h b/drivers/net/ethernet/microsoft/mana/gdma.h index c724ca410fcb..f945755760dc 100644 --- a/drivers/net/ethernet/microsoft/mana/gdma.h +++ b/drivers/net/ethernet/microsoft/mana/gdma.h @@ -22,11 +22,15 @@ enum gdma_request_type { GDMA_GENERATE_TEST_EQE = 10, GDMA_CREATE_QUEUE = 12, GDMA_DISABLE_QUEUE = 13, + GDMA_ALLOCATE_RESOURCE_RANGE = 22, + GDMA_DESTROY_RESOURCE_RANGE = 24, GDMA_CREATE_DMA_REGION = 25, GDMA_DMA_REGION_ADD_PAGES = 26, GDMA_DESTROY_DMA_REGION = 27, }; +#define GDMA_RESOURCE_DOORBELL_PAGE 27 + enum gdma_queue_type { GDMA_INVALID_QUEUE, GDMA_SQ, @@ -568,6 +572,26 @@ struct gdma_register_device_resp { u32 db_id; }; /* HW DATA */ +struct gdma_allocate_resource_range_req { + struct gdma_req_hdr hdr; + u32 resource_type; + u32 num_resources; + u32 alignment; + u32 allocated_resources; +}; + +struct gdma_allocate_resource_range_resp { + struct gdma_resp_hdr hdr; + u32 allocated_resources; +}; + +struct gdma_destroy_resource_range_req { + struct gdma_req_hdr hdr; + u32 resource_type; + u32 num_resources; + u32 allocated_resources; +}; + /* GDMA_CREATE_QUEUE */ struct gdma_create_queue_req { struct gdma_req_hdr hdr; @@ -676,4 +700,9 @@ void mana_gd_free_memory(struct gdma_mem_info *gmi); int mana_gd_send_request(struct gdma_context *gc, u32 req_len, const void *req, u32 resp_len, void *resp); + +int mana_gd_allocate_doorbell_page(struct gdma_context *gc, int *doorbell_page); + +int mana_gd_destroy_doorbell_page(struct gdma_context *gc, int doorbell_page); + #endif /* _GDMA_H */ diff --git a/drivers/net/ethernet/microsoft/mana/gdma_main.c b/drivers/net/ethernet/microsoft/mana/gdma_main.c index 9fafaa0c8e76..3c391b0cfab4 100644 --- a/drivers/net/ethernet/microsoft/mana/gdma_main.c +++ b/drivers/net/ethernet/microsoft/mana/gdma_main.c @@ -153,6 +153,62 @@ void mana_gd_free_memory(struct gdma_mem_info *gmi) gmi->dma_handle); } +int mana_gd_destroy_doorbell_page(struct gdma_context *gc, int doorbell_page) +{ + struct gdma_destroy_resource_range_req req = {}; + struct gdma_resp_hdr resp = {}; + int err; + + mana_gd_init_req_hdr(&req.hdr, GDMA_DESTROY_RESOURCE_RANGE, + sizeof(req), sizeof(resp)); + + req.resource_type = GDMA_RESOURCE_DOORBELL_PAGE; + req.num_resources = 1; + req.allocated_resources = doorbell_page; + + err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp); + if (err || resp.status) { + dev_err(gc->dev, + "Failed to destroy doorbell page: ret %d, 0x%x\n", + err, resp.status); + return err ? err : -EPROTO; + } + + return 0; +} +EXPORT_SYMBOL_NS(mana_gd_destroy_doorbell_page, NET_MANA); + +int mana_gd_allocate_doorbell_page(struct gdma_context *gc, + int *doorbell_page) +{ + struct gdma_allocate_resource_range_req req = {}; + struct gdma_allocate_resource_range_resp resp = {}; + int err; + + mana_gd_init_req_hdr(&req.hdr, GDMA_ALLOCATE_RESOURCE_RANGE, + sizeof(req), sizeof(resp)); + + req.resource_type = GDMA_RESOURCE_DOORBELL_PAGE; + req.num_resources = 1; + req.alignment = 1; + + /* Have GDMA start searching from 0 */ + req.allocated_resources = 0; + + err = mana_gd_send_request(gc, sizeof(req), &req, sizeof(resp), &resp); + if (err || resp.hdr.status) { + dev_err(gc->dev, + "Failed to allocate doorbell page: ret %d, 0x%x\n", + err, resp.hdr.status); + return err ? err : -EPROTO; + } + + *doorbell_page = resp.allocated_resources; + + return 0; +} +EXPORT_SYMBOL_NS(mana_gd_allocate_doorbell_page, NET_MANA); + static int mana_gd_create_hw_eq(struct gdma_context *gc, struct gdma_queue *queue) {