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rapidio: add query_mport operation 

Add mport query operation to report master port RapidIO capabilities and
run time configuration to upper level drivers.

Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com>
Cc: Matt Porter <mporter@kernel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@ti.com>
Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Alexandre Bounine 2016-03-22 14:26:00 -07:00 committed by Linus Torvalds
parent d2a321f37e
commit 8b189fdbc5
3 changed files with 69 additions and 0 deletions
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17
drivers/rapidio/rio.c
View File

@ -67,6 +67,23 @@ u16 rio_local_get_device_id(struct rio_mport *port)
return (RIO_GET_DID(port->sys_size, result));
}
/**
* rio_query_mport - Query mport device attributes
* @port: mport device to query
* @mport_attr: mport attributes data structure
*
* Returns attributes of specified mport through the
* pointer to attributes data structure.
*/
int rio_query_mport(struct rio_mport *port,
struct rio_mport_attr *mport_attr)
{
if (!port->ops->query_mport)
return -ENODATA;
return port->ops->query_mport(port, mport_attr);
}
EXPORT_SYMBOL(rio_query_mport);
/**
* rio_add_device- Adds a RIO device to the device model
* @rdev: RIO device

49
include/linux/rio.h
View File

@ -314,6 +314,50 @@ struct rio_net {
struct rio_id_table destid_table; /* destID allocation table */
};
enum rio_link_speed {
RIO_LINK_DOWN = 0, /* SRIO Link not initialized */
RIO_LINK_125 = 1, /* 1.25 GBaud */
RIO_LINK_250 = 2, /* 2.5 GBaud */
RIO_LINK_312 = 3, /* 3.125 GBaud */
RIO_LINK_500 = 4, /* 5.0 GBaud */
RIO_LINK_625 = 5 /* 6.25 GBaud */
};
enum rio_link_width {
RIO_LINK_1X = 0,
RIO_LINK_1XR = 1,
RIO_LINK_2X = 3,
RIO_LINK_4X = 2,
RIO_LINK_8X = 4,
RIO_LINK_16X = 5
};
enum rio_mport_flags {
RIO_MPORT_DMA = (1 << 0), /* supports DMA data transfers */
RIO_MPORT_DMA_SG = (1 << 1), /* DMA supports HW SG mode */
RIO_MPORT_IBSG = (1 << 2), /* inbound mapping supports SG */
};
/**
* struct rio_mport_attr - RIO mport device attributes
* @flags: mport device capability flags
* @link_speed: SRIO link speed value (as defined by RapidIO specification)
* @link_width: SRIO link width value (as defined by RapidIO specification)
* @dma_max_sge: number of SG list entries that can be handled by DMA channel(s)
* @dma_max_size: max number of bytes in single DMA transfer (SG entry)
* @dma_align: alignment shift for DMA operations (as for other DMA operations)
*/
struct rio_mport_attr {
int flags;
int link_speed;
int link_width;
/* DMA capability info: valid only if RIO_MPORT_DMA flag is set */
int dma_max_sge;
int dma_max_size;
int dma_align;
};
/* Low-level architecture-dependent routines */
/**
@ -333,6 +377,7 @@ struct rio_net {
* @get_inb_message: Callback to get a message from an inbound mailbox queue.
* @map_inb: Callback to map RapidIO address region into local memory space.
* @unmap_inb: Callback to unmap RapidIO address region mapped with map_inb().
* @query_mport: Callback to query mport device attributes.
*/
struct rio_ops {
int (*lcread) (struct rio_mport *mport, int index, u32 offset, int len,
@ -358,6 +403,8 @@ struct rio_ops {
int (*map_inb)(struct rio_mport *mport, dma_addr_t lstart,
u64 rstart, u32 size, u32 flags);
void (*unmap_inb)(struct rio_mport *mport, dma_addr_t lstart);
int (*query_mport)(struct rio_mport *mport,
struct rio_mport_attr *attr);
};
#define RIO_RESOURCE_MEM 0x00000100
@ -481,5 +528,7 @@ extern int rio_open_inb_mbox(struct rio_mport *, void *, int, int);
extern void rio_close_inb_mbox(struct rio_mport *, int);
extern int rio_open_outb_mbox(struct rio_mport *, void *, int, int);
extern void rio_close_outb_mbox(struct rio_mport *, int);
extern int rio_query_mport(struct rio_mport *port,
struct rio_mport_attr *mport_attr);
#endif /* LINUX_RIO_H */

3
include/linux/rio_regs.h
View File

@ -238,6 +238,8 @@
#define RIO_PORT_N_ACK_INBOUND 0x3f000000
#define RIO_PORT_N_ACK_OUTSTAND 0x00003f00
#define RIO_PORT_N_ACK_OUTBOUND 0x0000003f
#define RIO_PORT_N_CTL2_CSR(x) (0x0054 + x*0x20)
#define RIO_PORT_N_CTL2_SEL_BAUD 0xf0000000
#define RIO_PORT_N_ERR_STS_CSR(x) (0x0058 + x*0x20)
#define RIO_PORT_N_ERR_STS_PW_OUT_ES 0x00010000 /* Output Error-stopped */
#define RIO_PORT_N_ERR_STS_PW_INP_ES 0x00000100 /* Input Error-stopped */
@ -249,6 +251,7 @@
#define RIO_PORT_N_CTL_PWIDTH 0xc0000000
#define RIO_PORT_N_CTL_PWIDTH_1 0x00000000
#define RIO_PORT_N_CTL_PWIDTH_4 0x40000000
#define RIO_PORT_N_CTL_IPW 0x38000000 /* Initialized Port Width */
#define RIO_PORT_N_CTL_P_TYP_SER 0x00000001
#define RIO_PORT_N_CTL_LOCKOUT 0x00000002
#define RIO_PORT_N_CTL_EN_RX_SER 0x00200000