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authorAlexandre Bounine <alexandre.bounine@idt.com>2016-03-22 14:26:44 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-03-22 15:36:02 -0700
commit9a0b062742e7e039273c0c2ba4b96ad9ec7e7d8f (patch)
tree902e3fd63e79f4911b2896a67e8e06d93626abd4 /arch
parentb6cb95e8eb97e51a1a1b5609b59df859cc6dc2f2 (diff)
rapidio: add global inbound port write interfaces
Add new Port Write handler registration interfaces that attach PW handlers to local mport device objects. This is different from old interface that attaches PW callback to individual RapidIO device. The new interfaces are intended for use for common event handling (e.g. hot-plug notifications) while the old interface is available for individual device drivers. This patch is based on patch proposed by Andre van Herk but preserves existing per-device interface and adds lock protection for list handling. 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> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/sysdev/fsl_rio.c1
-rw-r--r--arch/powerpc/sysdev/fsl_rio.h1
-rw-r--r--arch/powerpc/sysdev/fsl_rmu.c16
3 files changed, 12 insertions, 6 deletions
diff --git a/arch/powerpc/sysdev/fsl_rio.c b/arch/powerpc/sysdev/fsl_rio.c
index 385371acc0d0..f5bf38b94595 100644
--- a/arch/powerpc/sysdev/fsl_rio.c
+++ b/arch/powerpc/sysdev/fsl_rio.c
@@ -726,6 +726,7 @@ int fsl_rio_setup(struct platform_device *dev)
fsl_rio_inbound_mem_init(priv);
dbell->mport[i] = port;
+ pw->mport[i] = port;
if (rio_register_mport(port)) {
release_resource(&port->iores);
diff --git a/arch/powerpc/sysdev/fsl_rio.h b/arch/powerpc/sysdev/fsl_rio.h
index d53407a34f32..12dd18fd4795 100644
--- a/arch/powerpc/sysdev/fsl_rio.h
+++ b/arch/powerpc/sysdev/fsl_rio.h
@@ -97,6 +97,7 @@ struct fsl_rio_dbell {
};
struct fsl_rio_pw {
+ struct rio_mport *mport[MAX_PORT_NUM];
struct device *dev;
struct rio_pw_regs __iomem *pw_regs;
struct rio_port_write_msg port_write_msg;
diff --git a/arch/powerpc/sysdev/fsl_rmu.c b/arch/powerpc/sysdev/fsl_rmu.c
index ffe0ee832768..c1826de4e749 100644
--- a/arch/powerpc/sysdev/fsl_rmu.c
+++ b/arch/powerpc/sysdev/fsl_rmu.c
@@ -481,14 +481,14 @@ pw_done:
static void fsl_pw_dpc(struct work_struct *work)
{
struct fsl_rio_pw *pw = container_of(work, struct fsl_rio_pw, pw_work);
- u32 msg_buffer[RIO_PW_MSG_SIZE/sizeof(u32)];
+ union rio_pw_msg msg_buffer;
+ int i;
/*
* Process port-write messages
*/
- while (kfifo_out_spinlocked(&pw->pw_fifo, (unsigned char *)msg_buffer,
+ while (kfifo_out_spinlocked(&pw->pw_fifo, (unsigned char *)&msg_buffer,
RIO_PW_MSG_SIZE, &pw->pw_fifo_lock)) {
- /* Process one message */
#ifdef DEBUG_PW
{
u32 i;
@@ -496,15 +496,19 @@ static void fsl_pw_dpc(struct work_struct *work)
for (i = 0; i < RIO_PW_MSG_SIZE/sizeof(u32); i++) {
if ((i%4) == 0)
pr_debug("\n0x%02x: 0x%08x", i*4,
- msg_buffer[i]);
+ msg_buffer.raw[i]);
else
- pr_debug(" 0x%08x", msg_buffer[i]);
+ pr_debug(" 0x%08x", msg_buffer.raw[i]);
}
pr_debug("\n");
}
#endif
/* Pass the port-write message to RIO core for processing */
- rio_inb_pwrite_handler((union rio_pw_msg *)msg_buffer);
+ for (i = 0; i < MAX_PORT_NUM; i++) {
+ if (pw->mport[i])
+ rio_inb_pwrite_handler(pw->mport[i],
+ &msg_buffer);
+ }
}
}

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