From 2aaf308b95b24649a6dcfed89cd956e972089b2a Mon Sep 17 00:00:00 2001 From: Alexandre Bounine Date: Mon, 7 Apr 2014 15:38:56 -0700 Subject: rapidio: rework device hierarchy and introduce mport class of devices This patch removes an artificial RapidIO bus root device and establishes actual device hierarchy by providing reference to real parent devices. It also introduces device class for RapidIO controller devices (on-chip or an eternal bridge, known as "mport"). Existing implementation was sufficient for SoC-based platforms that have a single RapidIO controller. With introduction of devices using multiple RapidIO controllers and PCIe-to-RapidIO bridges the old scheme is very limiting or does not work at all. The implemented changes allow to properly reference platform's local RapidIO mport devices and provide device details needed for upper layers. This change to RapidIO device hierarchy does not break any known existing kernel or user space interfaces. Signed-off-by: Alexandre Bounine Cc: Matt Porter Cc: Li Yang Cc: Kumar Gala Cc: Andre van Herk Cc: Stef van Os Cc: Jerry Jacobs Cc: Arno Tiemersma Cc: Rob Landley Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/rio.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/linux/rio.h') diff --git a/include/linux/rio.h b/include/linux/rio.h index b71d5738e683..6bda06f21930 100644 --- a/include/linux/rio.h +++ b/include/linux/rio.h @@ -83,7 +83,7 @@ #define RIO_CTAG_UDEVID 0x0001ffff /* Unique device identifier */ extern struct bus_type rio_bus_type; -extern struct device rio_bus; +extern struct class rio_mport_class; struct rio_mport; struct rio_dev; @@ -201,6 +201,7 @@ struct rio_dev { #define rio_dev_f(n) list_entry(n, struct rio_dev, net_list) #define to_rio_dev(n) container_of(n, struct rio_dev, dev) #define sw_to_rio_dev(n) container_of(n, struct rio_dev, rswitch[0]) +#define to_rio_mport(n) container_of(n, struct rio_mport, dev) /** * struct rio_msg - RIO message event @@ -248,6 +249,7 @@ enum rio_phy_type { * @phy_type: RapidIO phy type * @phys_efptr: RIO port extended features pointer * @name: Port name string + * @dev: device structure associated with an mport * @priv: Master port private data * @dma: DMA device associated with mport * @nscan: RapidIO network enumeration/discovery operations @@ -272,6 +274,7 @@ struct rio_mport { enum rio_phy_type phy_type; /* RapidIO phy type */ u32 phys_efptr; unsigned char name[RIO_MAX_MPORT_NAME]; + struct device dev; void *priv; /* Master port private data */ #ifdef CONFIG_RAPIDIO_DMA_ENGINE struct dma_device dma; -- cgit v1.2.3