sgi-xp: add usage of GRU driver by xpc_remote_memcpy()
Add UV support to xpc_remote_memcpy(), which involves interfacing to the
GRU driver.
Signed-off-by: Dean Nelson <dcn@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: "Luck, Tony" <tony.luck@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/misc/sgi-xp/xpnet.c b/drivers/misc/sgi-xp/xpnet.c
index 49385f4..4f5d622 100644
--- a/drivers/misc/sgi-xp/xpnet.c
+++ b/drivers/misc/sgi-xp/xpnet.c
@@ -44,7 +44,7 @@
u16 version; /* Version for this message */
u16 embedded_bytes; /* #of bytes embedded in XPC message */
u32 magic; /* Special number indicating this is xpnet */
- u64 buf_pa; /* phys address of buffer to retrieve */
+ unsigned long buf_pa; /* phys address of buffer to retrieve */
u32 size; /* #of bytes in buffer */
u8 leadin_ignore; /* #of bytes to ignore at the beginning */
u8 tailout_ignore; /* #of bytes to ignore at the end */
@@ -152,6 +152,7 @@
xpnet_receive(short partid, int channel, struct xpnet_message *msg)
{
struct sk_buff *skb;
+ void *dst;
enum xp_retval ret;
struct xpnet_dev_private *priv =
(struct xpnet_dev_private *)xpnet_device->priv;
@@ -166,9 +167,8 @@
return;
}
- dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n",
- (unsigned long)msg->buf_pa, msg->size, msg->leadin_ignore,
- msg->tailout_ignore);
+ dev_dbg(xpnet, "received 0x%lx, %d, %d, %d\n", msg->buf_pa, msg->size,
+ msg->leadin_ignore, msg->tailout_ignore);
/* reserve an extra cache line */
skb = dev_alloc_skb(msg->size + L1_CACHE_BYTES);
@@ -210,15 +210,12 @@
skb_copy_to_linear_data(skb, &msg->data,
(size_t)msg->embedded_bytes);
} else {
+ dst = (void *)((u64)skb->data & ~(L1_CACHE_BYTES - 1));
dev_dbg(xpnet, "transferring buffer to the skb->data area;\n\t"
- "xp_remote_memcpy(0x%p, 0x%p, %hu)\n", (void *)
- ((u64)skb->data & ~(L1_CACHE_BYTES - 1)),
+ "xp_remote_memcpy(0x%p, 0x%p, %hu)\n", dst,
(void *)msg->buf_pa, msg->size);
- ret = xp_remote_memcpy((void *)((u64)skb->data &
- ~(L1_CACHE_BYTES - 1)),
- (void *)msg->buf_pa, msg->size);
-
+ ret = xp_remote_memcpy(xp_pa(dst), msg->buf_pa, msg->size);
if (ret != xpSuccess) {
/*
* !!! Need better way of cleaning skb. Currently skb
@@ -226,8 +223,7 @@
* !!! dev_kfree_skb.
*/
dev_err(xpnet, "xp_remote_memcpy(0x%p, 0x%p, 0x%hx) "
- "returned error=0x%x\n", (void *)
- ((u64)skb->data & ~(L1_CACHE_BYTES - 1)),
+ "returned error=0x%x\n", dst,
(void *)msg->buf_pa, msg->size, ret);
xpc_received(partid, channel, (void *)msg);
@@ -428,13 +424,13 @@
msg->size = end_addr - start_addr;
msg->leadin_ignore = (u64)skb->data - start_addr;
msg->tailout_ignore = end_addr - (u64)skb_tail_pointer(skb);
- msg->buf_pa = __pa(start_addr);
+ msg->buf_pa = xp_pa((void *)start_addr);
dev_dbg(xpnet, "sending XPC message to %d:%d\n"
KERN_DEBUG "msg->buf_pa=0x%lx, msg->size=%u, "
"msg->leadin_ignore=%u, msg->tailout_ignore=%u\n",
- dest_partid, XPC_NET_CHANNEL, (unsigned long)msg->buf_pa,
- msg->size, msg->leadin_ignore, msg->tailout_ignore);
+ dest_partid, XPC_NET_CHANNEL, msg->buf_pa, msg->size,
+ msg->leadin_ignore, msg->tailout_ignore);
atomic_inc(&queued_msg->use_count);