From patchwork Thu May 21 13:00:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 11562887 X-Patchwork-Delegate: lorenzo.pieralisi@arm.com 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 26E2F138A for ; Thu, 21 May 2020 13:00:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 17D7B2084C for ; Thu, 21 May 2020 13:00:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729401AbgEUNAe (ORCPT ); Thu, 21 May 2020 09:00:34 -0400 Received: from foss.arm.com ([217.140.110.172]:46130 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729166AbgEUNAe (ORCPT ); Thu, 21 May 2020 09:00:34 -0400 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 62CFDD6E; Thu, 21 May 2020 06:00:33 -0700 (PDT) Received: from red-moon.arm.com (unknown [10.57.29.145]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id DE3E83F305; Thu, 21 May 2020 06:00:30 -0700 (PDT) From: Lorenzo Pieralisi To: linux-arm-kernel@lists.infradead.org Cc: Lorenzo Pieralisi , Rob Herring , Joerg Roedel , Robin Murphy , Marc Zyngier , iommu@lists.linux-foundation.org, linux-acpi@vger.kernel.org, devicetree@vger.kernel.org, linux-pci@vger.kernel.org, "Rafael J. Wysocki" , Hanjun Guo , Bjorn Helgaas , Sudeep Holla , Catalin Marinas , Will Deacon , Makarand Pawagi , Diana Craciun , Laurentiu Tudor Subject: [PATCH 06/12] of/iommu: Make of_map_rid() PCI agnostic Date: Thu, 21 May 2020 14:00:02 +0100 Message-Id: <20200521130008.8266-7-lorenzo.pieralisi@arm.com> X-Mailer: git-send-email 2.26.1 In-Reply-To: <20200521130008.8266-1-lorenzo.pieralisi@arm.com> References: <20200521130008.8266-1-lorenzo.pieralisi@arm.com> MIME-Version: 1.0 Sender: linux-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org There is nothing PCI specific (other than the RID - requester ID) in the of_map_rid() implementation, so the same function can be reused for input/output IDs mapping for other busses just as well. Rename the RID instances/names to a generic "id" tag and provide an of_map_rid() wrapper function so that we can leave the existing (and legitimate) callers unchanged. No functionality change intended. Signed-off-by: Lorenzo Pieralisi Cc: Rob Herring Cc: Joerg Roedel Cc: Robin Murphy Cc: Marc Zyngier --- drivers/iommu/of_iommu.c | 2 +- drivers/of/base.c | 42 ++++++++++++++++++++-------------------- include/linux/of.h | 17 +++++++++++++++- 3 files changed, 38 insertions(+), 23 deletions(-) diff --git a/drivers/iommu/of_iommu.c b/drivers/iommu/of_iommu.c index 20738aacac89..ad96b87137d6 100644 --- a/drivers/iommu/of_iommu.c +++ b/drivers/iommu/of_iommu.c @@ -145,7 +145,7 @@ static int of_fsl_mc_iommu_init(struct fsl_mc_device *mc_dev, struct of_phandle_args iommu_spec = { .args_count = 1 }; int err; - err = of_map_rid(master_np, mc_dev->icid, "iommu-map", + err = of_map_id(master_np, mc_dev->icid, "iommu-map", "iommu-map-mask", &iommu_spec.np, iommu_spec.args); if (err) diff --git a/drivers/of/base.c b/drivers/of/base.c index ae03b1218b06..e000e17bd602 100644 --- a/drivers/of/base.c +++ b/drivers/of/base.c @@ -2201,15 +2201,15 @@ int of_find_last_cache_level(unsigned int cpu) } /** - * of_map_rid - Translate a requester ID through a downstream mapping. + * of_map_id - Translate a requester ID through a downstream mapping. * @np: root complex device node. - * @rid: device requester ID to map. + * @id: device ID to map. * @map_name: property name of the map to use. * @map_mask_name: optional property name of the mask to use. * @target: optional pointer to a target device node. * @id_out: optional pointer to receive the translated ID. * - * Given a device requester ID, look up the appropriate implementation-defined + * Given a device ID, look up the appropriate implementation-defined * platform ID and/or the target device which receives transactions on that * ID, as per the "iommu-map" and "msi-map" bindings. Either of @target or * @id_out may be NULL if only the other is required. If @target points to @@ -2219,11 +2219,11 @@ int of_find_last_cache_level(unsigned int cpu) * * Return: 0 on success or a standard error code on failure. */ -int of_map_rid(struct device_node *np, u32 rid, +int of_map_id(struct device_node *np, u32 id, const char *map_name, const char *map_mask_name, struct device_node **target, u32 *id_out) { - u32 map_mask, masked_rid; + u32 map_mask, masked_id; int map_len; const __be32 *map = NULL; @@ -2235,7 +2235,7 @@ int of_map_rid(struct device_node *np, u32 rid, if (target) return -ENODEV; /* Otherwise, no map implies no translation */ - *id_out = rid; + *id_out = id; return 0; } @@ -2255,22 +2255,22 @@ int of_map_rid(struct device_node *np, u32 rid, if (map_mask_name) of_property_read_u32(np, map_mask_name, &map_mask); - masked_rid = map_mask & rid; + masked_id = map_mask & id; for ( ; map_len > 0; map_len -= 4 * sizeof(*map), map += 4) { struct device_node *phandle_node; - u32 rid_base = be32_to_cpup(map + 0); + u32 id_base = be32_to_cpup(map + 0); u32 phandle = be32_to_cpup(map + 1); u32 out_base = be32_to_cpup(map + 2); - u32 rid_len = be32_to_cpup(map + 3); + u32 id_len = be32_to_cpup(map + 3); - if (rid_base & ~map_mask) { - pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores rid-base (0x%x)\n", + if (id_base & ~map_mask) { + pr_err("%pOF: Invalid %s translation - %s-mask (0x%x) ignores id-base (0x%x)\n", np, map_name, map_name, - map_mask, rid_base); + map_mask, id_base); return -EFAULT; } - if (masked_rid < rid_base || masked_rid >= rid_base + rid_len) + if (masked_id < id_base || masked_id >= id_base + id_len) continue; phandle_node = of_find_node_by_phandle(phandle); @@ -2288,20 +2288,20 @@ int of_map_rid(struct device_node *np, u32 rid, } if (id_out) - *id_out = masked_rid - rid_base + out_base; + *id_out = masked_id - id_base + out_base; - pr_debug("%pOF: %s, using mask %08x, rid-base: %08x, out-base: %08x, length: %08x, rid: %08x -> %08x\n", - np, map_name, map_mask, rid_base, out_base, - rid_len, rid, masked_rid - rid_base + out_base); + pr_debug("%pOF: %s, using mask %08x, id-base: %08x, out-base: %08x, length: %08x, id: %08x -> %08x\n", + np, map_name, map_mask, id_base, out_base, + id_len, id, masked_id - id_base + out_base); return 0; } - pr_info("%pOF: no %s translation for rid 0x%x on %pOF\n", np, map_name, - rid, target && *target ? *target : NULL); + pr_info("%pOF: no %s translation for id 0x%x on %pOF\n", np, map_name, + id, target && *target ? *target : NULL); /* Bypasses translation */ if (id_out) - *id_out = rid; + *id_out = id; return 0; } -EXPORT_SYMBOL_GPL(of_map_rid); +EXPORT_SYMBOL_GPL(of_map_id); diff --git a/include/linux/of.h b/include/linux/of.h index c669c0a4732f..b7934566a1aa 100644 --- a/include/linux/of.h +++ b/include/linux/of.h @@ -554,10 +554,18 @@ bool of_console_check(struct device_node *dn, char *name, int index); extern int of_cpu_node_to_id(struct device_node *np); -int of_map_rid(struct device_node *np, u32 rid, +int of_map_id(struct device_node *np, u32 id, const char *map_name, const char *map_mask_name, struct device_node **target, u32 *id_out); +static inline int of_map_rid(struct device_node *np, u32 rid, + const char *map_name, + const char *map_mask_name, + struct device_node **target, u32 *id_out) +{ + return of_map_id(np, rid, map_name, map_mask_name, target, id_out); +} + #else /* CONFIG_OF */ static inline void of_core_init(void) @@ -978,6 +986,13 @@ static inline int of_cpu_node_to_id(struct device_node *np) return -ENODEV; } +static inline int of_map_id(struct device_node *np, u32 id, + const char *map_name, const char *map_mask_name, + struct device_node **target, u32 *id_out) +{ + return -EINVAL; +} + static inline int of_map_rid(struct device_node *np, u32 rid, const char *map_name, const char *map_mask_name, struct device_node **target, u32 *id_out)