From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EBF291B4F07; Mon, 14 Oct 2024 11:00:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728903647; cv=none; b=teyhmyAO3kRxvrQ314+QvfF87e7bqNgxd0otHt67FWrPqV5OqtINaKAuCJGZk5IuX3wDXzMhRK/J0tIYbXsd5T7IpHDLuHCaWVFyWdGxiDxtvfN3ZV3UrbjDOf0upWL66BR7Ur2mZwN7HdvfLSo3dzfwvY2Zfrb89m2Q0Py/oJs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728903647; c=relaxed/simple; bh=zoBklO+Lsg/otgSnAT/gVbImhyH5IDeEHk1rRD0akTY=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=gWZPkHlpcq93d+5hF/1bo/rIgNrZN6KpbuRTI1/cZT9Z/ATNX/Z2UYH67+WaO2B0L7gH2hc1zwx9uroGo9SHWi3BsK+MZK1PKOGZjZRqs23bRr5Y98AruzvoJk4YibiGcDQGrsZItsB+7ecb2nwqKbUbZUcRGY9CxlwcTu7OzxU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 2C1911692; Mon, 14 Oct 2024 04:01:15 -0700 (PDT) Received: from e125769.cambridge.arm.com (e125769.cambridge.arm.com [10.1.196.27]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 68E4F3F51B; Mon, 14 Oct 2024 04:00:42 -0700 (PDT) From: Ryan Roberts To: "David S. Miller" , Andrew Morton , Anshuman Khandual , Ard Biesheuvel , Catalin Marinas , David Hildenbrand , Eric Dumazet , Greg Marsden , Ivan Ivanov , Jakub Kicinski , Kalesh Singh , Marc Zyngier , Marcin Wojtas , Mark Rutland , Matthias Brugger , Miroslav Benes , Paolo Abeni , Will Deacon Cc: Ryan Roberts , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, netdev@vger.kernel.org Subject: [RFC PATCH v1 25/57] net: marvell: Remove PAGE_SIZE compile-time constant assumption Date: Mon, 14 Oct 2024 11:58:32 +0100 Message-ID: <20241014105912.3207374-25-ryan.roberts@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241014105912.3207374-1-ryan.roberts@arm.com> References: <20241014105514.3206191-1-ryan.roberts@arm.com> <20241014105912.3207374-1-ryan.roberts@arm.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit To prepare for supporting boot-time page size selection, refactor code to remove assumptions about PAGE_SIZE being compile-time constant. Code intended to be equivalent when compile-time page size is active. Updated sky2 "struct rx_ring_info" member frag_addr[] to contain enough entries for the smallest supported page size. Updated mvneta "struct mvneta_tx_queue" members tso_hdrs[] and tso_hdrs_phys[] to contain enough entries for the smallest supported page size. Signed-off-by: Ryan Roberts --- ***NOTE*** Any confused maintainers may want to read the cover note here for context: https://lore.kernel.org/all/20241014105514.3206191-1-ryan.roberts@arm.com/ drivers/net/ethernet/marvell/mvneta.c | 9 ++++++--- drivers/net/ethernet/marvell/sky2.h | 2 +- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/marvell/mvneta.c b/drivers/net/ethernet/marvell/mvneta.c index 41894834fb53c..f3ac371d8f3a7 100644 --- a/drivers/net/ethernet/marvell/mvneta.c +++ b/drivers/net/ethernet/marvell/mvneta.c @@ -346,12 +346,15 @@ /* The size of a TSO header page */ #define MVNETA_TSO_PAGE_SIZE (2 * PAGE_SIZE) +#define MVNETA_TSO_PAGE_SIZE_MIN (2 * PAGE_SIZE_MIN) /* Number of TSO headers per page. This should be a power of 2 */ #define MVNETA_TSO_PER_PAGE (MVNETA_TSO_PAGE_SIZE / TSO_HEADER_SIZE) +#define MVNETA_TSO_PER_PAGE_MIN (MVNETA_TSO_PAGE_SIZE_MIN / TSO_HEADER_SIZE) /* Maximum number of TSO header pages */ #define MVNETA_MAX_TSO_PAGES (MVNETA_MAX_TXD / MVNETA_TSO_PER_PAGE) +#define MVNETA_MAX_TSO_PAGES_MAX (MVNETA_MAX_TXD / MVNETA_TSO_PER_PAGE_MIN) /* descriptor aligned size */ #define MVNETA_DESC_ALIGNED_SIZE 32 @@ -696,10 +699,10 @@ struct mvneta_tx_queue { int next_desc_to_proc; /* DMA buffers for TSO headers */ - char *tso_hdrs[MVNETA_MAX_TSO_PAGES]; + char *tso_hdrs[MVNETA_MAX_TSO_PAGES_MAX]; /* DMA address of TSO headers */ - dma_addr_t tso_hdrs_phys[MVNETA_MAX_TSO_PAGES]; + dma_addr_t tso_hdrs_phys[MVNETA_MAX_TSO_PAGES_MAX]; /* Affinity mask for CPUs*/ cpumask_t affinity_mask; @@ -5895,7 +5898,7 @@ static int __init mvneta_driver_init(void) { int ret; - BUILD_BUG_ON_NOT_POWER_OF_2(MVNETA_TSO_PER_PAGE); + BUILD_BUG_ON_NOT_POWER_OF_2(MVNETA_TSO_PER_PAGE_MIN); ret = cpuhp_setup_state_multi(CPUHP_AP_ONLINE_DYN, "net/mvneta:online", mvneta_cpu_online, diff --git a/drivers/net/ethernet/marvell/sky2.h b/drivers/net/ethernet/marvell/sky2.h index 8d0bacf4e49cc..8ee73ae087dfc 100644 --- a/drivers/net/ethernet/marvell/sky2.h +++ b/drivers/net/ethernet/marvell/sky2.h @@ -2195,7 +2195,7 @@ struct rx_ring_info { struct sk_buff *skb; dma_addr_t data_addr; DEFINE_DMA_UNMAP_LEN(data_size); - dma_addr_t frag_addr[ETH_JUMBO_MTU >> PAGE_SHIFT ?: 1]; + dma_addr_t frag_addr[ETH_JUMBO_MTU >> PAGE_SHIFT_MIN ?: 1]; }; enum flow_control { -- 2.43.0