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authorAlexandre Bounine <alexandre.bounine@idt.com>2016-08-02 21:06:43 (GMT)
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-02 23:35:34 (GMT)
commite519685de3e44bb013d81f5ead04ac4b33c9b3a1 (patch)
tree27519f32fb0941337133f594082a7cf8882f1076 /drivers/rapidio
parentcb782cdd2ffffbf7fd17e4aefb20f4db5c67caeb (diff)
rapidio/tsi721: add messaging mbox selector parameter
Add module parameter to allow load time configuration of available RapidIO messaging mailboxes (MBOX1 - MBOX4). Having a messaging MBOX selector mask allows to define which MBOXes are controlled by the mport device driver and reserve some of them for direct use by other drivers. Link: http://lkml.kernel.org/r/1469125134-16523-7-git-send-email-alexandre.bounine@idt.com Signed-off-by: Alexandre Bounine <alexandre.bounine@idt.com> Tested-by: Barry Wood <barry.wood@idt.com> Cc: Matt Porter <mporter@kernel.crashing.org> Cc: Andre van Herk <andre.van.herk@prodrive-technologies.com> Cc: Barry Wood <barry.wood@idt.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'drivers/rapidio')
-rw-r--r--drivers/rapidio/devices/tsi721.c15
1 files changed, 15 insertions, 0 deletions
diff --git a/drivers/rapidio/devices/tsi721.c b/drivers/rapidio/devices/tsi721.c
index 85098f8..8e07cd5 100644
--- a/drivers/rapidio/devices/tsi721.c
+++ b/drivers/rapidio/devices/tsi721.c
@@ -46,6 +46,11 @@ static int pcie_mrrs = -1;
module_param(pcie_mrrs, int, S_IRUGO);
MODULE_PARM_DESC(pcie_mrrs, "PCIe MRRS override value (0...5)");
+static u8 mbox_sel = 0x0f;
+module_param(mbox_sel, byte, S_IRUGO);
+MODULE_PARM_DESC(mbox_sel,
+ "RIO Messaging MBOX Selection Mask (default: 0x0f = all)");
+
static void tsi721_omsg_handler(struct tsi721_device *priv, int ch);
static void tsi721_imsg_handler(struct tsi721_device *priv, int ch);
@@ -1881,6 +1886,11 @@ static int tsi721_open_outb_mbox(struct rio_mport *mport, void *dev_id,
goto out;
}
+ if ((mbox_sel & (1 << mbox)) == 0) {
+ rc = -ENODEV;
+ goto out;
+ }
+
priv->omsg_ring[mbox].dev_id = dev_id;
priv->omsg_ring[mbox].size = entries;
priv->omsg_ring[mbox].sts_rdptr = 0;
@@ -2165,6 +2175,11 @@ static int tsi721_open_inb_mbox(struct rio_mport *mport, void *dev_id,
goto out;
}
+ if ((mbox_sel & (1 << mbox)) == 0) {
+ rc = -ENODEV;
+ goto out;
+ }
+
/* Initialize IB Messaging Ring */
priv->imsg_ring[mbox].dev_id = dev_id;
priv->imsg_ring[mbox].size = entries;

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