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Date: Fri, 5 Feb 2016 18:19:23 -0500
From: Alexandre Bounine <alexandre.bounine@....com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alexandre Bounine <alexandre.bounine@....com>,
Matt Porter <mporter@...nel.crashing.org>,
Aurelien Jacquiot <a-jacquiot@...com>,
Andre van Herk <andre.van.herk@...drive-technologies.com>,
linux-kernel@...r.kernel.org
Subject: [PATCH 07/30] 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@....com>
Cc: Matt Porter <mporter@...nel.crashing.org>
Cc: Aurelien Jacquiot <a-jacquiot@...com>
Cc: Andre van Herk <andre.van.herk@...drive-technologies.com>
Cc: linux-kernel@...r.kernel.org
---
drivers/rapidio/rio.c | 17 ++++++++++++++++
include/linux/rio.h | 49 ++++++++++++++++++++++++++++++++++++++++++++++
include/linux/rio_regs.h | 3 ++
3 files changed, 69 insertions(+), 0 deletions(-)
diff --git a/drivers/rapidio/rio.c b/drivers/rapidio/rio.c
index d7b87c6..4a302d4 100644
--- a/drivers/rapidio/rio.c
+++ b/drivers/rapidio/rio.c
@@ -68,6 +68,23 @@ u16 rio_local_get_device_id(struct rio_mport *port)
}
/**
+ * 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
*
diff --git a/include/linux/rio.h b/include/linux/rio.h
index cde976e..8996a62 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 */
diff --git a/include/linux/rio_regs.h b/include/linux/rio_regs.h
index 218168a..1063ae3 100644
--- a/include/linux/rio_regs.h
+++ b/include/linux/rio_regs.h
@@ -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
--
1.7.8.4
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