{"id":2226613,"url":"http://patchwork.ozlabs.org/api/1.1/patches/2226613/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260422161407.118748-20-kwilczynski@kernel.org/","project":{"id":28,"url":"http://patchwork.ozlabs.org/api/1.1/projects/28/?format=json","name":"Linux PCI development","link_name":"linux-pci","list_id":"linux-pci.vger.kernel.org","list_email":"linux-pci@vger.kernel.org","web_url":null,"scm_url":null,"webscm_url":null},"msgid":"<20260422161407.118748-20-kwilczynski@kernel.org>","date":"2026-04-22T16:14:02","name":"[v6,19/24] PCI: Add macros for legacy I/O and memory address space sizes","commit_ref":null,"pull_url":null,"state":"new","archived":false,"hash":"91539e604feebb67e91d99f7a9add8a52f4fe953","submitter":{"id":86709,"url":"http://patchwork.ozlabs.org/api/1.1/people/86709/?format=json","name":"Krzysztof Wilczyński","email":"kwilczynski@kernel.org"},"delegate":null,"mbox":"http://patchwork.ozlabs.org/project/linux-pci/patch/20260422161407.118748-20-kwilczynski@kernel.org/mbox/","series":[{"id":501041,"url":"http://patchwork.ozlabs.org/api/1.1/series/501041/?format=json","web_url":"http://patchwork.ozlabs.org/project/linux-pci/list/?series=501041","date":"2026-04-22T16:13:46","name":"PCI: Convert all dynamic sysfs attributes to static","version":6,"mbox":"http://patchwork.ozlabs.org/series/501041/mbox/"}],"comments":"http://patchwork.ozlabs.org/api/patches/2226613/comments/","check":"pending","checks":"http://patchwork.ozlabs.org/api/patches/2226613/checks/","tags":{},"headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-pci@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256\n header.s=k20201202 header.b=D5CcSfMH;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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charset=UTF-8","Content-Transfer-Encoding":"8bit"},"content":"Add defines for the standard PCI legacy address space sizes,\nreplacing the raw literals used by the legacy sysfs attributes.\n\nThen, replace open-coded values with the newly added macros.\n\nNo functional changes intended.\n\nSuggested-by: Ilpo Järvinen \nSigned-off-by: Krzysztof Wilczyński \n---\n drivers/pci/pci-sysfs.c | 4 ++--\n include/linux/pci.h | 5 +++++\n 2 files changed, 7 insertions(+), 2 deletions(-)","diff":"diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c\nindex 3a7bbb00ca60..ad8ee192c94b 100644\n--- a/drivers/pci/pci-sysfs.c\n+++ b/drivers/pci/pci-sysfs.c\n@@ -1055,7 +1055,7 @@ void pci_create_legacy_files(struct pci_bus *b)\n \n \tsysfs_bin_attr_init(b->legacy_io);\n \tb->legacy_io->attr.name = \"legacy_io\";\n-\tb->legacy_io->size = 0xffff;\n+\tb->legacy_io->size = PCI_LEGACY_IO_SIZE;\n \tb->legacy_io->attr.mode = 0600;\n \tb->legacy_io->read = pci_read_legacy_io;\n \tb->legacy_io->write = pci_write_legacy_io;\n@@ -1072,7 +1072,7 @@ void pci_create_legacy_files(struct pci_bus *b)\n \tb->legacy_mem = b->legacy_io + 1;\n \tsysfs_bin_attr_init(b->legacy_mem);\n \tb->legacy_mem->attr.name = \"legacy_mem\";\n-\tb->legacy_mem->size = 1024*1024;\n+\tb->legacy_mem->size = PCI_LEGACY_MEM_SIZE;\n \tb->legacy_mem->attr.mode = 0600;\n \tb->legacy_mem->mmap = pci_mmap_legacy_mem;\n \t/* See pci_create_attr() for motivation */\ndiff --git a/include/linux/pci.h b/include/linux/pci.h\nindex f6f55005f82d..6b630bac8c08 100644\n--- a/include/linux/pci.h\n+++ b/include/linux/pci.h\n@@ -27,6 +27,7 @@\n #include \n \n #include \n+#include \n #include \n #include \n #include \n@@ -1167,6 +1168,10 @@ enum {\n /* These external functions are only available when PCI support is enabled */\n #ifdef CONFIG_PCI\n \n+/* PCI legacy I/O port and memory address space sizes. */\n+#define PCI_LEGACY_IO_SIZE\t(SZ_64K - 1)\n+#define PCI_LEGACY_MEM_SIZE\tSZ_1M\n+\n extern unsigned int pci_flags;\n \n static inline void pci_set_flags(int flags) { pci_flags = flags; }\n","prefixes":["v6","19/24"]}