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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>
hifive-unleashed-5.1
Alexandre Bounine 2016-08-02 14:06:43 -07:00 committed by Linus Torvalds
parent cb782cdd2f
commit e519685de3
2 changed files with 20 additions and 0 deletions
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5
Documentation/rapidio/tsi721.txt
View File

@ -46,6 +46,11 @@ fully compatible with RIONET driver (Ethernet over RapidIO messaging services).
0 = 128B, 1 = 256B, 2 = 512B, 3 = 1024B, 4 = 2048B and 5 = 4096B.
Default value is '-1' (= keep platform setting).
- 'mbox_sel' - RIO messaging MBOX selection mask. This is a bitmask that defines
messaging MBOXes are managed by this device driver. Mask bits 0 - 3
correspond to MBOX0 - MBOX3. MBOX is under driver's control if the
corresponding bit is set to '1'. Default value is 0x0f (= all).
II. Known problems
None.

15
drivers/rapidio/devices/tsi721.c
View File

@ -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;