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authorAlexandre Bounine <alexandre.bounine@idt.com>2016-03-22 14:26:00 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 15:36:02 -0700
commit8b189fdbc5f68f3f43e67004de25f75c1a5b4e51 (patch)
treeb511383866423f5bfd0fff2257c0b4e2cd4985cf /include/linux/rio.h
parentd2a321f37ed49de86058b5daaf50a11d3ee2d61f (diff)
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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>
Diffstat (limited to 'include/linux/rio.h')
-rw-r--r--include/linux/rio.h49
1 files changed, 49 insertions, 0 deletions
diff --git a/include/linux/rio.h b/include/linux/rio.h
index cde976e86b48..8996a629a321 100644
--- a/include/linux/rio.h
+++ b/include/linux/rio.h
@@ -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 */
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