From patchwork Wed Apr 20 15:09:26 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Juergen Gross X-Patchwork-Id: 12820443 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 694E1C43217 for ; Wed, 20 Apr 2022 15:10:17 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.309348.525498 (Exim 4.92) (envelope-from ) id 1nhBxx-00043c-Rq; Wed, 20 Apr 2022 15:10:01 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 309348.525498; Wed, 20 Apr 2022 15:10:01 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nhBxx-000434-O6; Wed, 20 Apr 2022 15:10:01 +0000 Received: by outflank-mailman (input) for mailman id 309348; Wed, 20 Apr 2022 15:10:00 +0000 Received: from se1-gles-flk1-in.inumbo.com ([94.247.172.50] helo=se1-gles-flk1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1nhBxw-0003l9-EK for xen-devel@lists.xenproject.org; Wed, 20 Apr 2022 15:10:00 +0000 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by se1-gles-flk1.inumbo.com (Halon) with ESMTPS id f1d218da-c0bb-11ec-8fbf-03012f2f19d4; Wed, 20 Apr 2022 17:09:59 +0200 (CEST) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id E2C341F380; Wed, 20 Apr 2022 15:09:58 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id A1E0513AD5; Wed, 20 Apr 2022 15:09:58 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id uItUJkYiYGJILQAAMHmgww (envelope-from ); Wed, 20 Apr 2022 15:09:58 +0000 X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: f1d218da-c0bb-11ec-8fbf-03012f2f19d4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1650467398; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=1+sLUcbyL72u2uT21oB5tsWX/EFozEKqCEXKzXzCiFA=; b=RLridzMgQycyuagIizn5XaAT4I+nxk2qHqd10tZfXxzpJqLqtrA1gDkHD182fZNaso9mSe M9IT/uHa81ObORL8HehqC09E8nBntt7MTyqLHZ9M417SVAZWN+02SKS/YxV7x5VfpqEzCX 9ftMZq85+XPw0YvTrEoKDbTzpI9EF3E= From: Juergen Gross To: xen-devel@lists.xenproject.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Juergen Gross , Boris Ostrovsky , Stefano Stabellini , "David S. Miller" , Jakub Kicinski , Paolo Abeni Subject: [PATCH 02/18] xen/netfront: switch netfront to use INVALID_GRANT_REF Date: Wed, 20 Apr 2022 17:09:26 +0200 Message-Id: <20220420150942.31235-3-jgross@suse.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220420150942.31235-1-jgross@suse.com> References: <20220420150942.31235-1-jgross@suse.com> MIME-Version: 1.0 Instead of using a private macro for an invalid grant reference use the common one. Signed-off-by: Juergen Gross --- drivers/net/xen-netfront.c | 36 +++++++++++++++++------------------- 1 file changed, 17 insertions(+), 19 deletions(-) diff --git a/drivers/net/xen-netfront.c b/drivers/net/xen-netfront.c index e2b4a1893a13..af3d3de7d9fa 100644 --- a/drivers/net/xen-netfront.c +++ b/drivers/net/xen-netfront.c @@ -78,8 +78,6 @@ struct netfront_cb { #define RX_COPY_THRESHOLD 256 -#define GRANT_INVALID_REF 0 - #define NET_TX_RING_SIZE __CONST_RING_SIZE(xen_netif_tx, XEN_PAGE_SIZE) #define NET_RX_RING_SIZE __CONST_RING_SIZE(xen_netif_rx, XEN_PAGE_SIZE) @@ -224,7 +222,7 @@ static grant_ref_t xennet_get_rx_ref(struct netfront_queue *queue, { int i = xennet_rxidx(ri); grant_ref_t ref = queue->grant_rx_ref[i]; - queue->grant_rx_ref[i] = GRANT_INVALID_REF; + queue->grant_rx_ref[i] = INVALID_GRANT_REF; return ref; } @@ -432,7 +430,7 @@ static bool xennet_tx_buf_gc(struct netfront_queue *queue) } gnttab_release_grant_reference( &queue->gref_tx_head, queue->grant_tx_ref[id]); - queue->grant_tx_ref[id] = GRANT_INVALID_REF; + queue->grant_tx_ref[id] = INVALID_GRANT_REF; queue->grant_tx_page[id] = NULL; add_id_to_list(&queue->tx_skb_freelist, queue->tx_link, id); dev_kfree_skb_irq(skb); @@ -1021,7 +1019,7 @@ static int xennet_get_responses(struct netfront_queue *queue, * the backend driver. In future this should flag the bad * situation to the system controller to reboot the backend. */ - if (ref == GRANT_INVALID_REF) { + if (ref == INVALID_GRANT_REF) { if (net_ratelimit()) dev_warn(dev, "Bad rx response id %d.\n", rx->id); @@ -1390,7 +1388,7 @@ static void xennet_release_tx_bufs(struct netfront_queue *queue) gnttab_end_foreign_access(queue->grant_tx_ref[i], (unsigned long)page_address(queue->grant_tx_page[i])); queue->grant_tx_page[i] = NULL; - queue->grant_tx_ref[i] = GRANT_INVALID_REF; + queue->grant_tx_ref[i] = INVALID_GRANT_REF; add_id_to_list(&queue->tx_skb_freelist, queue->tx_link, i); dev_kfree_skb_irq(skb); } @@ -1411,7 +1409,7 @@ static void xennet_release_rx_bufs(struct netfront_queue *queue) continue; ref = queue->grant_rx_ref[id]; - if (ref == GRANT_INVALID_REF) + if (ref == INVALID_GRANT_REF) continue; page = skb_frag_page(&skb_shinfo(skb)->frags[0]); @@ -1422,7 +1420,7 @@ static void xennet_release_rx_bufs(struct netfront_queue *queue) get_page(page); gnttab_end_foreign_access(ref, (unsigned long)page_address(page)); - queue->grant_rx_ref[id] = GRANT_INVALID_REF; + queue->grant_rx_ref[id] = INVALID_GRANT_REF; kfree_skb(skb); } @@ -1761,7 +1759,7 @@ static int netfront_probe(struct xenbus_device *dev, static void xennet_end_access(int ref, void *page) { /* This frees the page as a side-effect */ - if (ref != GRANT_INVALID_REF) + if (ref != INVALID_GRANT_REF) gnttab_end_foreign_access(ref, (unsigned long)page); } @@ -1798,8 +1796,8 @@ static void xennet_disconnect_backend(struct netfront_info *info) xennet_end_access(queue->tx_ring_ref, queue->tx.sring); xennet_end_access(queue->rx_ring_ref, queue->rx.sring); - queue->tx_ring_ref = GRANT_INVALID_REF; - queue->rx_ring_ref = GRANT_INVALID_REF; + queue->tx_ring_ref = INVALID_GRANT_REF; + queue->rx_ring_ref = INVALID_GRANT_REF; queue->tx.sring = NULL; queue->rx.sring = NULL; @@ -1927,8 +1925,8 @@ static int setup_netfront(struct xenbus_device *dev, grant_ref_t gref; int err; - queue->tx_ring_ref = GRANT_INVALID_REF; - queue->rx_ring_ref = GRANT_INVALID_REF; + queue->tx_ring_ref = INVALID_GRANT_REF; + queue->rx_ring_ref = INVALID_GRANT_REF; queue->rx.sring = NULL; queue->tx.sring = NULL; @@ -1978,17 +1976,17 @@ static int setup_netfront(struct xenbus_device *dev, * granted pages because backend is not accessing it at this point. */ fail: - if (queue->rx_ring_ref != GRANT_INVALID_REF) { + if (queue->rx_ring_ref != INVALID_GRANT_REF) { gnttab_end_foreign_access(queue->rx_ring_ref, (unsigned long)rxs); - queue->rx_ring_ref = GRANT_INVALID_REF; + queue->rx_ring_ref = INVALID_GRANT_REF; } else { free_page((unsigned long)rxs); } - if (queue->tx_ring_ref != GRANT_INVALID_REF) { + if (queue->tx_ring_ref != INVALID_GRANT_REF) { gnttab_end_foreign_access(queue->tx_ring_ref, (unsigned long)txs); - queue->tx_ring_ref = GRANT_INVALID_REF; + queue->tx_ring_ref = INVALID_GRANT_REF; } else { free_page((unsigned long)txs); } @@ -2020,7 +2018,7 @@ static int xennet_init_queue(struct netfront_queue *queue) queue->tx_pend_queue = TX_LINK_NONE; for (i = 0; i < NET_TX_RING_SIZE; i++) { queue->tx_link[i] = i + 1; - queue->grant_tx_ref[i] = GRANT_INVALID_REF; + queue->grant_tx_ref[i] = INVALID_GRANT_REF; queue->grant_tx_page[i] = NULL; } queue->tx_link[NET_TX_RING_SIZE - 1] = TX_LINK_NONE; @@ -2028,7 +2026,7 @@ static int xennet_init_queue(struct netfront_queue *queue) /* Clear out rx_skbs */ for (i = 0; i < NET_RX_RING_SIZE; i++) { queue->rx_skbs[i] = NULL; - queue->grant_rx_ref[i] = GRANT_INVALID_REF; + queue->grant_rx_ref[i] = INVALID_GRANT_REF; } /* A grant for every tx ring slot */