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Reviewed-by: Christophe Leroy Signed-off-by: Rasmus Villemoes --- drivers/soc/fsl/qe/qe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c index 612d9c551be5..855373deb746 100644 --- a/drivers/soc/fsl/qe/qe.c +++ b/drivers/soc/fsl/qe/qe.c @@ -306,7 +306,7 @@ static void qe_snums_init(void) 0x28, 0x29, 0x38, 0x39, 0x48, 0x49, 0x58, 0x59, 0x68, 0x69, 0x78, 0x79, 0x80, 0x81, }; - static const u8 *snum_init; + const u8 *snum_init; qe_num_of_snum = qe_get_num_of_snums(); From patchwork Wed May 1 09:29:05 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 1093633 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44vCpZ1bvsz9s4V for ; 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Wed, 1 May 2019 09:29:05 +0000 From: Rasmus Villemoes To: "devicetree@vger.kernel.org" , Qiang Zhao , Li Yang Subject: [PATCH v2 2/6] soc/fsl/qe: qe.c: reduce static memory footprint by 1.7K Thread-Topic: [PATCH v2 2/6] soc/fsl/qe: qe.c: reduce static memory footprint by 1.7K Thread-Index: AQHVAABR1o7sDOpAS063f+anh88+2w== Date: Wed, 1 May 2019 09:29:05 +0000 Message-ID: <20190501092841.9026-3-rasmus.villemoes@prevas.dk> References: <20190430133615.25721-1-rasmus.villemoes@prevas.dk> <20190501092841.9026-1-rasmus.villemoes@prevas.dk> In-Reply-To: <20190501092841.9026-1-rasmus.villemoes@prevas.dk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HE1PR0102CA0052.eurprd01.prod.exchangelabs.com (2603:10a6:7:7d::29) To VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:803:e3::20) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Rasmus.Villemoes@prevas.se; x-ms-exchange-messagesentrepresentingtype: 1 x-mailer: git-send-email 2.20.1 x-originating-ip: [81.216.59.226] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 4073b50e-fb21-4e5e-2995-08d6ce17740b x-microsoft-antispam: BCL:0; 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If we just unzip that structure, the array of snum values just use 256 bytes, while the free/inuse state can be tracked in a 32 byte bitmap. So this reduces the .data footprint by 1760 bytes. It also serves as preparation for introducing another DT binding for specifying the snum values. Signed-off-by: Rasmus Villemoes Reviewed-by: Christophe Leroy --- drivers/soc/fsl/qe/qe.c | 43 ++++++++++++----------------------------- 1 file changed, 12 insertions(+), 31 deletions(-) diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c index 855373deb746..303aa29cb27d 100644 --- a/drivers/soc/fsl/qe/qe.c +++ b/drivers/soc/fsl/qe/qe.c @@ -14,6 +14,7 @@ * Free Software Foundation; either version 2 of the License, or (at your * option) any later version. */ +#include #include #include #include @@ -43,25 +44,14 @@ static DEFINE_SPINLOCK(qe_lock); DEFINE_SPINLOCK(cmxgcr_lock); EXPORT_SYMBOL(cmxgcr_lock); -/* QE snum state */ -enum qe_snum_state { - QE_SNUM_STATE_USED, - QE_SNUM_STATE_FREE -}; - -/* QE snum */ -struct qe_snum { - u8 num; - enum qe_snum_state state; -}; - /* We allocate this here because it is used almost exclusively for * the communication processor devices. */ struct qe_immap __iomem *qe_immr; EXPORT_SYMBOL(qe_immr); -static struct qe_snum snums[QE_NUM_OF_SNUM]; /* Dynamically allocated SNUMs */ +static u8 snums[QE_NUM_OF_SNUM]; /* Dynamically allocated SNUMs */ +static DECLARE_BITMAP(snum_state, QE_NUM_OF_SNUM); static unsigned int qe_num_of_snum; static phys_addr_t qebase = -1; @@ -315,10 +305,8 @@ static void qe_snums_init(void) else snum_init = snum_init_46; - for (i = 0; i < qe_num_of_snum; i++) { - snums[i].num = snum_init[i]; - snums[i].state = QE_SNUM_STATE_FREE; - } + bitmap_zero(snum_state, QE_NUM_OF_SNUM); + memcpy(snums, snum_init, qe_num_of_snum); } int qe_get_snum(void) @@ -328,12 +316,10 @@ int qe_get_snum(void) int i; spin_lock_irqsave(&qe_lock, flags); - for (i = 0; i < qe_num_of_snum; i++) { - if (snums[i].state == QE_SNUM_STATE_FREE) { - snums[i].state = QE_SNUM_STATE_USED; - snum = snums[i].num; - break; - } + i = find_first_zero_bit(snum_state, qe_num_of_snum); + if (i < qe_num_of_snum) { + set_bit(i, snum_state); + snum = snums[i]; } spin_unlock_irqrestore(&qe_lock, flags); @@ -343,14 +329,9 @@ EXPORT_SYMBOL(qe_get_snum); void qe_put_snum(u8 snum) { - int i; - - for (i = 0; i < qe_num_of_snum; i++) { - if (snums[i].num == snum) { - snums[i].state = QE_SNUM_STATE_FREE; - break; - } - } + const u8 *p = memchr(snums, snum, qe_num_of_snum); + if (p) + clear_bit(p - snums, snum_state); } EXPORT_SYMBOL(qe_put_snum); From patchwork Wed May 1 09:29:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 1093635 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44vCr0031nz9s4V for ; Wed, 1 May 2019 19:33:20 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=prevas.dk Authentication-Results: ozlabs.org; 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DIR:OUT; SFP:1102; SCL:1; SRVR:VI1PR10MB2143; H:VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: prevas.se does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: ddS6KUlmkuerLJu3VBh7ANR62saeoQCJ/h1tDWkl3LKwIUxSWy/3zTFWmig4Awyf2QKmEfQscr51qeTwKl+5P1KwZ/gHlrKBbT/ESHmTi15E2DLWE7GR9b9RJ0uU7m237g93Jw//wiMBIa04rfKXYlf9t4B686rZ5P1pONqsZTnq9lEKKTzGKGG/QQqeHeHmx8aEFxz2zgD7pryYrQIr6Xs+WuHmKW7aTyGdWolv93zegqg8Fd0539aOcWpE74lBdpVvmlo7BbM4msH92OWIIQIJMQM13hdo5nmxH5DlWIg+xkU+ZLvlAInWosAC0xzddtFgUr09jfkRjJ34tO4oacygxIXr31apwX9gGek4KA5M3zWcwsjgTnNuLQ+jfsuAH5xy0FjZssEoIFTI8T5D8cDWcpCbtsAdrG2uYLwaoik= MIME-Version: 1.0 X-OriginatorOrg: prevas.dk X-MS-Exchange-CrossTenant-Network-Message-Id: 8b3f79db-2e4b-4133-4e00-08d6ce177520 X-MS-Exchange-CrossTenant-originalarrivaltime: 01 May 2019 09:29:06.7657 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d350cf71-778d-4780-88f5-071a4cb1ed61 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR10MB2143 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , "linux-kernel@vger.kernel.org" , Scott Wood , Rasmus Villemoes , Rob Herring , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The 'try of_find_compatible_node(NULL, NULL, "fsl,qe"), fall back to of_find_node_by_type(NULL, "qe")' pattern is repeated five times. Factor it into a common helper. Reviewed-by: Christophe Leroy Signed-off-by: Rasmus Villemoes --- drivers/soc/fsl/qe/qe.c | 71 +++++++++++++++++------------------------ 1 file changed, 29 insertions(+), 42 deletions(-) diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c index 303aa29cb27d..0fb8b59f61ad 100644 --- a/drivers/soc/fsl/qe/qe.c +++ b/drivers/soc/fsl/qe/qe.c @@ -56,6 +56,20 @@ static unsigned int qe_num_of_snum; static phys_addr_t qebase = -1; +static struct device_node *qe_get_device_node(void) +{ + struct device_node *qe; + + /* + * Newer device trees have an "fsl,qe" compatible property for the QE + * node, but we still need to support older device trees. + */ + qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); + if (qe) + return qe; + return of_find_node_by_type(NULL, "qe"); +} + static phys_addr_t get_qe_base(void) { struct device_node *qe; @@ -65,12 +79,9 @@ static phys_addr_t get_qe_base(void) if (qebase != -1) return qebase; - qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); - if (!qe) { - qe = of_find_node_by_type(NULL, "qe"); - if (!qe) - return qebase; - } + qe = qe_get_device_node(); + if (!qe) + return qebase; ret = of_address_to_resource(qe, 0, &res); if (!ret) @@ -164,12 +175,9 @@ unsigned int qe_get_brg_clk(void) if (brg_clk) return brg_clk; - qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); - if (!qe) { - qe = of_find_node_by_type(NULL, "qe"); - if (!qe) - return brg_clk; - } + qe = qe_get_device_node(); + if (!qe) + return brg_clk; prop = of_get_property(qe, "brg-frequency", &size); if (prop && size == sizeof(*prop)) @@ -557,16 +565,9 @@ struct qe_firmware_info *qe_get_firmware_info(void) initialized = 1; - /* - * Newer device trees have an "fsl,qe" compatible property for the QE - * node, but we still need to support older device trees. - */ - qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); - if (!qe) { - qe = of_find_node_by_type(NULL, "qe"); - if (!qe) - return NULL; - } + qe = qe_get_device_node(); + if (!qe) + return NULL; /* Find the 'firmware' child node */ fw = of_get_child_by_name(qe, "firmware"); @@ -612,16 +613,9 @@ unsigned int qe_get_num_of_risc(void) unsigned int num_of_risc = 0; const u32 *prop; - qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); - if (!qe) { - /* Older devices trees did not have an "fsl,qe" - * compatible property, so we need to look for - * the QE node by name. - */ - qe = of_find_node_by_type(NULL, "qe"); - if (!qe) - return num_of_risc; - } + qe = qe_get_device_node(); + if (!qe) + return num_of_risc; prop = of_get_property(qe, "fsl,qe-num-riscs", &size); if (prop && size == sizeof(*prop)) @@ -641,16 +635,9 @@ unsigned int qe_get_num_of_snums(void) const u32 *prop; num_of_snums = 28; /* The default number of snum for threads is 28 */ - qe = of_find_compatible_node(NULL, NULL, "fsl,qe"); - if (!qe) { - /* Older devices trees did not have an "fsl,qe" - * compatible property, so we need to look for - * the QE node by name. - */ - qe = of_find_node_by_type(NULL, "qe"); - if (!qe) - return num_of_snums; - } + qe = qe_get_device_node(); + if (!qe) + return num_of_snums; prop = of_get_property(qe, "fsl,qe-num-snums", &size); if (prop && size == sizeof(*prop)) { From patchwork Wed May 1 09:29:08 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 1093636 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [203.11.71.2]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44vCsS1kC8z9s6w for ; Wed, 1 May 2019 19:34:36 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=prevas.dk Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=prevas.se header.i=@prevas.se header.b="CdOhGx0j"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44vCsS0kWQzDqWh for ; 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d=prevas.se; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=fdIU3JucIMee+PIHDK9qSxLKioYm0DOUxEhV9Kua/m8=; b=CdOhGx0jz8s4kGEUeQ5R9YPmiwZxtbAkKJIyavqdariEiAm7AgInkuYVJIF2nu3w5gRZ99eX61TZX7NBlxELUEcaNpTTl7r2c1MiSnykatIv5szHPLGVCul3XVtJzoSJw9FFdrvFvfQUZLwHLxkHSELE0NGWfWMT+QWnhpM/D8g= Received: from VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM (20.178.126.212) by VI1PR10MB2143.EURPRD10.PROD.OUTLOOK.COM (20.177.60.21) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.1835.14; Wed, 1 May 2019 09:29:08 +0000 Received: from VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM ([fe80::48b8:9cff:182:f3d8]) by VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM ([fe80::48b8:9cff:182:f3d8%2]) with mapi id 15.20.1856.008; Wed, 1 May 2019 09:29:08 +0000 From: Rasmus Villemoes To: "devicetree@vger.kernel.org" , Qiang Zhao , Li Yang Subject: [PATCH v2 4/6] dt-bindings: soc/fsl: qe: document new fsl, qe-snums binding Thread-Topic: [PATCH v2 4/6] dt-bindings: soc/fsl: qe: document new fsl,qe-snums binding Thread-Index: AQHVAABTBBh/pLqBQEiPEhE0F8Qajw== Date: Wed, 1 May 2019 09:29:08 +0000 Message-ID: <20190501092841.9026-5-rasmus.villemoes@prevas.dk> References: <20190430133615.25721-1-rasmus.villemoes@prevas.dk> <20190501092841.9026-1-rasmus.villemoes@prevas.dk> In-Reply-To: <20190501092841.9026-1-rasmus.villemoes@prevas.dk> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-clientproxiedby: HE1PR0102CA0052.eurprd01.prod.exchangelabs.com (2603:10a6:7:7d::29) To VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM (2603:10a6:803:e3::20) authentication-results: spf=none (sender IP is ) smtp.mailfrom=Rasmus.Villemoes@prevas.se; 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DIR:OUT; SFP:1102; SCL:1; SRVR:VI1PR10MB2143; H:VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: prevas.se does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: AqsXV23houvs7fy1N7Du7jixIcSJhmAJ02uWpTo//NCyDX3o7OXGO9fyncZpKmzfwtw8o/c7JvJWN1u7722tYYPK3NxLkAppCGC1a0/Jk2STlEIG0mR+gVv+UYkgKkWjEzyTlpMVku1zb7V6pZDNlMNKzsX42P/goG1ZHenDsxPMLxbvtNd+/9/C/Bc6khu+/oPPvvYzoA7ieLneJkO3cnWSRL+G9onqoC8HAObaDEbNwjcJudALv2qJJopQLIYzPGTiZJeD1rrD9cpoqchwLBvO71ujN6e1FthvWx1puKE2WQShn/Hxcajll5Y0oERCir+O/gIpgzVEJMJns1xIYituoysROsPH8AnlowhnhVNwFjYaPVdTt6b2PWpbnPcSYax8oMyGrMmZ8QdSGScEO3UzmiOweREbw92rzcYFNtU= MIME-Version: 1.0 X-OriginatorOrg: prevas.dk X-MS-Exchange-CrossTenant-Network-Message-Id: 833879d1-a410-4def-0894-08d6ce1775fc X-MS-Exchange-CrossTenant-originalarrivaltime: 01 May 2019 09:29:08.2197 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d350cf71-778d-4780-88f5-071a4cb1ed61 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR10MB2143 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , "linux-kernel@vger.kernel.org" , Scott Wood , Rasmus Villemoes , Rob Herring , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Reading table 4-30, and its footnotes, of the QUICC Engine Block Reference Manual shows that the set of snum _values_ is not necessarily just a function of the _number_ of snums, as given in the fsl,qe-num-snums property. As an alternative, to make it easier to add support for other variants of the QUICC engine IP, this introduces a new binding fsl,qe-snums, which automatically encodes both the number of snums and the actual values to use. For example, for the MPC8309, one would specify the property as fsl,qe-snums = /bits/ 8 < 0x88 0x89 0x98 0x99 0xa8 0xa9 0xb8 0xb9 0xc8 0xc9 0xd8 0xd9 0xe8 0xe9>; Signed-off-by: Rasmus Villemoes Reviewed-by: Rob Herring --- Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt index d7afaff5faff..05f5f485562a 100644 --- a/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt +++ b/Documentation/devicetree/bindings/soc/fsl/cpm_qe/qe.txt @@ -18,7 +18,8 @@ Required properties: - reg : offset and length of the device registers. - bus-frequency : the clock frequency for QUICC Engine. - fsl,qe-num-riscs: define how many RISC engines the QE has. -- fsl,qe-num-snums: define how many serial number(SNUM) the QE can use for the +- fsl,qe-snums: This property has to be specified as '/bits/ 8' value, + defining the array of serial number (SNUM) values for the virtual threads. Optional properties: @@ -34,6 +35,11 @@ Recommended properties - brg-frequency : the internal clock source frequency for baud-rate generators in Hz. +Deprecated properties +- fsl,qe-num-snums: define how many serial number(SNUM) the QE can use + for the threads. Use fsl,qe-snums instead to not only specify the + number of snums, but also their values. + Example: qe@e0100000 { #address-cells = <1>; From patchwork Wed May 1 09:29:09 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 1093638 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44vCtx5zLzz9s6w for ; Wed, 1 May 2019 19:35:53 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=prevas.dk Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=prevas.se header.i=@prevas.se header.b="OeYjfEDp"; dkim-atps=neutral Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 44vCtx4y3gzDqX7 for ; 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DIR:OUT; SFP:1102; SCL:1; SRVR:VI1PR10MB2143; H:VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: prevas.se does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: 3YJSKbs3ZK4ERtCT6aOJk5VP68QOpc1fNwgDcqDr5j+M9XBY40RyU5J6viJ7B4RbWRg6Yf7Yazp8WoAfqWHGkawnH1dXJ/lFSxXvI4uTrUbSK3NAxJVjCHPyWBek4Pat2LDwxwElTV4lciagWbRhpgZ0tfiQo8hbqHDRbpEwvKIELwsJDNsK3V+pEMvCoG3YoxCv6mhlBvqcOvHpbKJ9I3L3OntZsVVpQNjjRuOEAq3tpX7W5iNA/ryqiQvpj58ioEciE2pAz3JFF3VZzgiUMz0wBg80MWZFwgIsELKzpHiC0qRnstXoC36ITx5R1z/dPg03WXUplVqFSH8nP9XkacYfsyj2wtrgoupZMgkqrxRPhH6kv6jiq5UH6TBKXWCr80d/l5xKYfKjTRH3mcZ7wMfzfRBa0P7w8MPpng6hU4A= MIME-Version: 1.0 X-OriginatorOrg: prevas.dk X-MS-Exchange-CrossTenant-Network-Message-Id: dc97cc28-bef8-46a5-7123-08d6ce1776d9 X-MS-Exchange-CrossTenant-originalarrivaltime: 01 May 2019 09:29:09.7998 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d350cf71-778d-4780-88f5-071a4cb1ed61 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR10MB2143 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , "linux-kernel@vger.kernel.org" , Scott Wood , Rasmus Villemoes , Rob Herring , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" Add driver support for the newly introduced fsl,qe-snums property. Conveniently, of_property_read_variable_u8_array does exactly what we need: If the property fsl,qe-snums is found (and has an allowed size), the array of values get copied to snums, and the return value is the number of snums - we cannot assign directly to num_of_snums, since we need to check whether the return value is negative. Signed-off-by: Rasmus Villemoes Reviewed-by: Christophe Leroy --- drivers/soc/fsl/qe/qe.c | 16 ++++++++++++++-- 1 file changed, 14 insertions(+), 2 deletions(-) diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c index 0fb8b59f61ad..325d689cbf5c 100644 --- a/drivers/soc/fsl/qe/qe.c +++ b/drivers/soc/fsl/qe/qe.c @@ -283,7 +283,6 @@ EXPORT_SYMBOL(qe_clock_source); */ static void qe_snums_init(void) { - int i; static const u8 snum_init_76[] = { 0x04, 0x05, 0x0C, 0x0D, 0x14, 0x15, 0x1C, 0x1D, 0x24, 0x25, 0x2C, 0x2D, 0x34, 0x35, 0x88, 0x89, @@ -304,7 +303,21 @@ static void qe_snums_init(void) 0x28, 0x29, 0x38, 0x39, 0x48, 0x49, 0x58, 0x59, 0x68, 0x69, 0x78, 0x79, 0x80, 0x81, }; + struct device_node *qe; const u8 *snum_init; + int i; + + bitmap_zero(snum_state, QE_NUM_OF_SNUM); + qe = qe_get_device_node(); + if (qe) { + i = of_property_read_variable_u8_array(qe, "fsl,qe-snums", + snums, 1, QE_NUM_OF_SNUM); + of_node_put(qe); + if (i > 0) { + qe_num_of_snum = i; + return; + } + } qe_num_of_snum = qe_get_num_of_snums(); @@ -313,7 +326,6 @@ static void qe_snums_init(void) else snum_init = snum_init_46; - bitmap_zero(snum_state, QE_NUM_OF_SNUM); memcpy(snums, snum_init, qe_num_of_snum); } From patchwork Wed May 1 09:29:11 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rasmus Villemoes X-Patchwork-Id: 1093640 Return-Path: X-Original-To: patchwork-incoming@ozlabs.org Delivered-To: patchwork-incoming@ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id 44vCxs4wrwz9s6w for ; Wed, 1 May 2019 19:38:25 +1000 (AEST) Authentication-Results: ozlabs.org; dmarc=none (p=none dis=none) header.from=prevas.dk Authentication-Results: ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=prevas.se header.i=@prevas.se header.b="EIKqxYr7"; 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DIR:OUT; SFP:1102; SCL:1; SRVR:VI1PR10MB2143; H:VI1PR10MB2672.EURPRD10.PROD.OUTLOOK.COM; FPR:; SPF:None; LANG:en; PTR:InfoNoRecords; MX:1; A:1; received-spf: None (protection.outlook.com: prevas.se does not designate permitted sender hosts) x-ms-exchange-senderadcheck: 1 x-microsoft-antispam-message-info: qhtg5M63n5P1md+BVAQm+hKvEjikUdMaUTcJaH0w8SqLKDIXU7pMHpXu1P5bm7rKwuZ21bFPGIHiGLIRZbPAyev4K95W3dW2ZhdGXqsqKRai3NP1JEyIhloraDesi7ZayHOGpo/s7wneVxc4pygWwbSeGylLv5uJcn52AxOVBiB+QVYSAIwggn0fSWciCJWPSm3gzTAbtOhiE7tdSL4vIdqQDjHZoh804xuSheu1u74uTRC1bmCPNQxeSJKG9V3SukB/KN5YICbE4HS+0KeJP9KAe0CNQKCG/6oBaX6wvI1PL4XvRcHLD3MseXmv9+WzGU2yWL1PLBPUZXQgtFLtI7w+gEiAoj8vPXH3J9mXZjj0H8LlL+SE6LwKfuu4vaO47auYekpljmpfsVfwCsjnz3vTaKrTk3TSy3ZWxkyxnmk= MIME-Version: 1.0 X-OriginatorOrg: prevas.dk X-MS-Exchange-CrossTenant-Network-Message-Id: 8e836d97-bd8c-46fa-76d8-08d6ce1777cb X-MS-Exchange-CrossTenant-originalarrivaltime: 01 May 2019 09:29:11.7492 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d350cf71-778d-4780-88f5-071a4cb1ed61 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR10MB2143 X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , "linux-kernel@vger.kernel.org" , Scott Wood , Rasmus Villemoes , Rob Herring , "linuxppc-dev@lists.ozlabs.org" , "linux-arm-kernel@lists.infradead.org" Errors-To: linuxppc-dev-bounces+patchwork-incoming=ozlabs.org@lists.ozlabs.org Sender: "Linuxppc-dev" The comment "No QE ever has fewer than 28 SNUMs" is false; e.g. the MPC8309 has 14. The code path returning -EINVAL is also a recipe for instant disaster, since the caller (qe_snums_init) uncritically assigns the return value to the unsigned qe_num_of_snum, and would thus proceed to attempt to copy 4GB from snum_init_46[] to the snum[] array. So fold the handling of the legacy fsl,qe-num-snums into qe_snums_init, and make sure we do not end up using the snum_init_46 array in cases other than the two where we know it makes sense. Signed-off-by: Rasmus Villemoes Reviewed-by: Christophe Leroy Reviewed-by: Qiang Zhao --- drivers/soc/fsl/qe/qe.c | 46 ++++++++++++++--------------------------- 1 file changed, 16 insertions(+), 30 deletions(-) diff --git a/drivers/soc/fsl/qe/qe.c b/drivers/soc/fsl/qe/qe.c index 325d689cbf5c..276d7d78ebfc 100644 --- a/drivers/soc/fsl/qe/qe.c +++ b/drivers/soc/fsl/qe/qe.c @@ -308,24 +308,33 @@ static void qe_snums_init(void) int i; bitmap_zero(snum_state, QE_NUM_OF_SNUM); + qe_num_of_snum = 28; /* The default number of snum for threads is 28 */ qe = qe_get_device_node(); if (qe) { i = of_property_read_variable_u8_array(qe, "fsl,qe-snums", snums, 1, QE_NUM_OF_SNUM); - of_node_put(qe); if (i > 0) { + of_node_put(qe); qe_num_of_snum = i; return; } + /* + * Fall back to legacy binding of using the value of + * fsl,qe-num-snums to choose one of the static arrays + * above. + */ + of_property_read_u32(qe, "fsl,qe-num-snums", &qe_num_of_snum); + of_node_put(qe); } - qe_num_of_snum = qe_get_num_of_snums(); - - if (qe_num_of_snum == 76) + if (qe_num_of_snum == 76) { snum_init = snum_init_76; - else + } else if (qe_num_of_snum == 28 || qe_num_of_snum == 46) { snum_init = snum_init_46; - + } else { + pr_err("QE: unsupported value of fsl,qe-num-snums: %u\n", qe_num_of_snum); + return; + } memcpy(snums, snum_init, qe_num_of_snum); } @@ -641,30 +650,7 @@ EXPORT_SYMBOL(qe_get_num_of_risc); unsigned int qe_get_num_of_snums(void) { - struct device_node *qe; - int size; - unsigned int num_of_snums; - const u32 *prop; - - num_of_snums = 28; /* The default number of snum for threads is 28 */ - qe = qe_get_device_node(); - if (!qe) - return num_of_snums; - - prop = of_get_property(qe, "fsl,qe-num-snums", &size); - if (prop && size == sizeof(*prop)) { - num_of_snums = *prop; - if ((num_of_snums < 28) || (num_of_snums > QE_NUM_OF_SNUM)) { - /* No QE ever has fewer than 28 SNUMs */ - pr_err("QE: number of snum is invalid\n"); - of_node_put(qe); - return -EINVAL; - } - } - - of_node_put(qe); - - return num_of_snums; + return qe_num_of_snum; } EXPORT_SYMBOL(qe_get_num_of_snums);