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Thu, 16 Apr 2026 18:02:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1776362540; bh=BLU+KRsbxlmJUSwM/Q6w6TrYFfSYHYfNFSZ0GfT9Wi4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=AXa5ai8RGQyDGUKZL2wnI3/i2vo3wTCHlazehldlwloRd2zx2mrXhnujZL7MeQefn zlF9swkO6tjB0As1NDVV+lLwMBFOaAaf7q48JDEDpM+SP7ZLQDLmag7TuFtbFd/HJQ wlAoF7cL/ehYXbMsNNNOwk2KEEdH2cMrzUqtJjdctiO0AUtF3NS7mT0KCDDS8Ls/zj 73/OwJPCI2wDC9xdngRaI4z6AP7okT2zR5msFfPtd32IfnzwJYI5nWgGgdtHmUZCcG k2KyMx5HMoqgvZlfWi0S1SXry8F3cXtQZuFreAL2kF+C6z3sEkfwailUGRi6fFu+oh urSEEteTWikBA== From: =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= To: Bjorn Helgaas Cc: Bjorn Helgaas , Manivannan Sadhasivam , Lorenzo Pieralisi , Magnus Lindholm , Matt Turner , Richard Henderson , Christophe Leroy , Madhavan Srinivasan , Michael Ellerman , Nicholas Piggin , Dexuan Cui , =?UTF-8?q?Krzysztof=20Ha=C5=82asa?= , Lukas Wunner , "Oliver O'Halloran" , Saurabh Singh Sengar , Shuan He , Srivatsa Bhat , =?UTF-8?q?Ilpo=20J=C3=A4rvinen?= , linux-pci@vger.kernel.org, linux-alpha@vger.kernel.org, linuxppc-dev@lists.ozlabs.org Subject: [PATCH v5 19/23] PCI: Add macros for legacy I/O and memory address space sizes Date: Thu, 16 Apr 2026 18:01:03 +0000 Message-ID: <20260416180107.777065-20-kwilczynski@kernel.org> X-Mailer: git-send-email 2.53.0 In-Reply-To: <20260416180107.777065-1-kwilczynski@kernel.org> References: <20260416180107.777065-1-kwilczynski@kernel.org> X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Add defines for the standard PCI legacy address space sizes, replacing the raw literals used by the legacy sysfs attributes. Then, replace open-coded values with the newly added macros. No functional changes intended. Suggested-by: Ilpo Järvinen Signed-off-by: Krzysztof Wilczyński --- drivers/pci/pci-sysfs.c | 4 ++-- include/linux/pci.h | 5 +++++ 2 files changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/pci/pci-sysfs.c b/drivers/pci/pci-sysfs.c index 3a7bbb00ca60..ad8ee192c94b 100644 --- a/drivers/pci/pci-sysfs.c +++ b/drivers/pci/pci-sysfs.c @@ -1055,7 +1055,7 @@ void pci_create_legacy_files(struct pci_bus *b) sysfs_bin_attr_init(b->legacy_io); b->legacy_io->attr.name = "legacy_io"; - b->legacy_io->size = 0xffff; + b->legacy_io->size = PCI_LEGACY_IO_SIZE; b->legacy_io->attr.mode = 0600; b->legacy_io->read = pci_read_legacy_io; b->legacy_io->write = pci_write_legacy_io; @@ -1072,7 +1072,7 @@ void pci_create_legacy_files(struct pci_bus *b) b->legacy_mem = b->legacy_io + 1; sysfs_bin_attr_init(b->legacy_mem); b->legacy_mem->attr.name = "legacy_mem"; - b->legacy_mem->size = 1024*1024; + b->legacy_mem->size = PCI_LEGACY_MEM_SIZE; b->legacy_mem->attr.mode = 0600; b->legacy_mem->mmap = pci_mmap_legacy_mem; /* See pci_create_attr() for motivation */ diff --git a/include/linux/pci.h b/include/linux/pci.h index f6f55005f82d..6b630bac8c08 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h @@ -27,6 +27,7 @@ #include #include +#include #include #include #include @@ -1167,6 +1168,10 @@ enum { /* These external functions are only available when PCI support is enabled */ #ifdef CONFIG_PCI +/* PCI legacy I/O port and memory address space sizes. */ +#define PCI_LEGACY_IO_SIZE (SZ_64K - 1) +#define PCI_LEGACY_MEM_SIZE SZ_1M + extern unsigned int pci_flags; static inline void pci_set_flags(int flags) { pci_flags = flags; } -- 2.53.0