netdev - [PATCH 1/5] PCI: Add defines for max read request sizes

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Message-Id: <1422291922-12324-1-git-send-email-zajec5@gmail.com>
Date:	Mon, 26 Jan 2015 18:05:22 +0100
From:	Rafał Miłecki <zajec5@...il.com>
To:	Bjorn Helgaas <bhelgaas@...gle.com>, linux-pci@...r.kernel.org
Cc:	Matt Porter <mporter@...nel.crashing.org>,
	Alexandre Bounine <alexandre.bounine@....com>,
	Chris Metcalf <cmetcalf@...hip.com>,
	Bradley Grove <linuxdrivers@...otech.com>,
	linux-scsi@...r.kernel.org,
	Realtek linux nic maintainers <nic_swsd@...ltek.com>,
	netdev@...r.kernel.org,
	Rafał Miłecki <zajec5@...il.com>
Subject: [PATCH 1/5] PCI: Add defines for max read request sizes

There are few drivers using magic numbers when operating with PCIe
capabilities and PCI_EXP_DEVCTL_READRQ. Define known values to allow
cleaning their code a bit.

Signed-off-by: Rafał Miłecki <zajec5@...il.com>
---
 include/uapi/linux/pci_regs.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 4a1d0cc..efe3443 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -451,6 +451,10 @@
 #define  PCI_EXP_DEVCTL_AUX_PME	0x0400	/* Auxiliary Power PM Enable */
 #define  PCI_EXP_DEVCTL_NOSNOOP_EN 0x0800  /* Enable No Snoop */
 #define  PCI_EXP_DEVCTL_READRQ	0x7000	/* Max_Read_Request_Size */
+#define  PCI_EXP_DEVCTL_READRQ_128B  0x0000 /* 128 Bytes */
+#define  PCI_EXP_DEVCTL_READRQ_256B  0x1000 /* 256 Bytes */
+#define  PCI_EXP_DEVCTL_READRQ_512B  0x2000 /* 512 Bytes */
+#define  PCI_EXP_DEVCTL_READRQ_1024B 0x3000 /* 1024 Bytes */
 #define  PCI_EXP_DEVCTL_BCR_FLR 0x8000  /* Bridge Configuration Retry / FLR */
 #define PCI_EXP_DEVSTA		10	/* Device Status */
 #define  PCI_EXP_DEVSTA_CED	0x0001	/* Correctable Error Detected */
-- 
1.8.4.5

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