[RFC/PATCH 2/4] powerpc/pseries: Factor HVSI header struct in packet definitions
Benjamin Herrenschmidt
benh at kernel.crashing.org
Fri Apr 29 11:18:40 EST 2011
Embed the struct hvsi_header in the various packet definitions
rather than open coding it multiple times. Will help provide
stronger type checking.
Signed-off-by: Benjamin Herrenschmidt <benh at kernel.crashing.org>
---
arch/powerpc/include/asm/hvsi.h | 16 ++-------
drivers/tty/hvc/hvsi.c | 66 +++++++++++++++++++-------------------
2 files changed, 37 insertions(+), 45 deletions(-)
diff --git a/arch/powerpc/include/asm/hvsi.h b/arch/powerpc/include/asm/hvsi.h
index f13125a..ab2ddd7 100644
--- a/arch/powerpc/include/asm/hvsi.h
+++ b/arch/powerpc/include/asm/hvsi.h
@@ -29,16 +29,12 @@ struct hvsi_header {
} __attribute__((packed));
struct hvsi_data {
- uint8_t type;
- uint8_t len;
- uint16_t seqno;
+ struct hvsi_header hdr;
uint8_t data[HVSI_MAX_OUTGOING_DATA];
} __attribute__((packed));
struct hvsi_control {
- uint8_t type;
- uint8_t len;
- uint16_t seqno;
+ struct hvsi_header hdr;
uint16_t verb;
/* optional depending on verb: */
uint32_t word;
@@ -46,16 +42,12 @@ struct hvsi_control {
} __attribute__((packed));
struct hvsi_query {
- uint8_t type;
- uint8_t len;
- uint16_t seqno;
+ struct hvsi_header hdr;
uint16_t verb;
} __attribute__((packed));
struct hvsi_query_response {
- uint8_t type;
- uint8_t len;
- uint16_t seqno;
+ struct hvsi_header hdr;
uint16_t verb;
uint16_t query_seqno;
union {
diff --git a/drivers/tty/hvc/hvsi.c b/drivers/tty/hvc/hvsi.c
index 0b35793..c94e2f5 100644
--- a/drivers/tty/hvc/hvsi.c
+++ b/drivers/tty/hvc/hvsi.c
@@ -295,18 +295,18 @@ static int hvsi_version_respond(struct hvsi_struct *hp, uint16_t query_seqno)
struct hvsi_query_response packet __ALIGNED__;
int wrote;
- packet.type = VS_QUERY_RESPONSE_PACKET_HEADER;
- packet.len = sizeof(struct hvsi_query_response);
- packet.seqno = atomic_inc_return(&hp->seqno);
+ packet.hdr.type = VS_QUERY_RESPONSE_PACKET_HEADER;
+ packet.hdr.len = sizeof(struct hvsi_query_response);
+ packet.hdr.seqno = atomic_inc_return(&hp->seqno);
packet.verb = VSV_SEND_VERSION_NUMBER;
packet.u.version = HVSI_VERSION;
packet.query_seqno = query_seqno+1;
- pr_debug("%s: sending %i bytes\n", __func__, packet.len);
- dbg_dump_hex((uint8_t*)&packet, packet.len);
+ pr_debug("%s: sending %i bytes\n", __func__, packet.hdr.len);
+ dbg_dump_hex((uint8_t*)&packet, packet.hdr.len);
- wrote = hvc_put_chars(hp->vtermno, (char *)&packet, packet.len);
- if (wrote != packet.len) {
+ wrote = hvc_put_chars(hp->vtermno, (char *)&packet, packet.hdr.len);
+ if (wrote != packet.hdr.len) {
printk(KERN_ERR "hvsi%i: couldn't send query response!\n",
hp->index);
return -EIO;
@@ -321,7 +321,7 @@ static void hvsi_recv_query(struct hvsi_struct *hp, uint8_t *packet)
switch (hp->state) {
case HVSI_WAIT_FOR_VER_QUERY:
- hvsi_version_respond(hp, query->seqno);
+ hvsi_version_respond(hp, query->hdr.seqno);
__set_state(hp, HVSI_OPEN);
break;
default:
@@ -579,16 +579,16 @@ static int hvsi_query(struct hvsi_struct *hp, uint16_t verb)
struct hvsi_query packet __ALIGNED__;
int wrote;
- packet.type = VS_QUERY_PACKET_HEADER;
- packet.len = sizeof(struct hvsi_query);
- packet.seqno = atomic_inc_return(&hp->seqno);
+ packet.hdr.type = VS_QUERY_PACKET_HEADER;
+ packet.hdr.len = sizeof(struct hvsi_query);
+ packet.hdr.seqno = atomic_inc_return(&hp->seqno);
packet.verb = verb;
- pr_debug("%s: sending %i bytes\n", __func__, packet.len);
- dbg_dump_hex((uint8_t*)&packet, packet.len);
+ pr_debug("%s: sending %i bytes\n", __func__, packet.hdr.len);
+ dbg_dump_hex((uint8_t*)&packet, packet.hdr.len);
- wrote = hvc_put_chars(hp->vtermno, (char *)&packet, packet.len);
- if (wrote != packet.len) {
+ wrote = hvc_put_chars(hp->vtermno, (char *)&packet, packet.hdr.len);
+ if (wrote != packet.hdr.len) {
printk(KERN_ERR "hvsi%i: couldn't send query (%i)!\n", hp->index,
wrote);
return -EIO;
@@ -622,20 +622,20 @@ static int hvsi_set_mctrl(struct hvsi_struct *hp, uint16_t mctrl)
struct hvsi_control packet __ALIGNED__;
int wrote;
- packet.type = VS_CONTROL_PACKET_HEADER,
- packet.seqno = atomic_inc_return(&hp->seqno);
- packet.len = sizeof(struct hvsi_control);
+ packet.hdr.type = VS_CONTROL_PACKET_HEADER,
+ packet.hdr.seqno = atomic_inc_return(&hp->seqno);
+ packet.hdr.len = sizeof(struct hvsi_control);
packet.verb = VSV_SET_MODEM_CTL;
packet.mask = HVSI_TSDTR;
if (mctrl & TIOCM_DTR)
packet.word = HVSI_TSDTR;
- pr_debug("%s: sending %i bytes\n", __func__, packet.len);
- dbg_dump_hex((uint8_t*)&packet, packet.len);
+ pr_debug("%s: sending %i bytes\n", __func__, packet.hdr.len);
+ dbg_dump_hex((uint8_t*)&packet, packet.hdr.len);
- wrote = hvc_put_chars(hp->vtermno, (char *)&packet, packet.len);
- if (wrote != packet.len) {
+ wrote = hvc_put_chars(hp->vtermno, (char *)&packet, packet.hdr.len);
+ if (wrote != packet.hdr.len) {
printk(KERN_ERR "hvsi%i: couldn't set DTR!\n", hp->index);
return -EIO;
}
@@ -705,13 +705,13 @@ static int hvsi_put_chars(struct hvsi_struct *hp, const char *buf, int count)
BUG_ON(count > HVSI_MAX_OUTGOING_DATA);
- packet.type = VS_DATA_PACKET_HEADER;
- packet.seqno = atomic_inc_return(&hp->seqno);
- packet.len = count + sizeof(struct hvsi_header);
+ packet.hdr.type = VS_DATA_PACKET_HEADER;
+ packet.hdr.seqno = atomic_inc_return(&hp->seqno);
+ packet.hdr.len = count + sizeof(struct hvsi_header);
memcpy(&packet.data, buf, count);
- ret = hvc_put_chars(hp->vtermno, (char *)&packet, packet.len);
- if (ret == packet.len) {
+ ret = hvc_put_chars(hp->vtermno, (char *)&packet, packet.hdr.len);
+ if (ret == packet.hdr.len) {
/* return the number of chars written, not the packet length */
return count;
}
@@ -722,15 +722,15 @@ static void hvsi_close_protocol(struct hvsi_struct *hp)
{
struct hvsi_control packet __ALIGNED__;
- packet.type = VS_CONTROL_PACKET_HEADER;
- packet.seqno = atomic_inc_return(&hp->seqno);
- packet.len = 6;
+ packet.hdr.type = VS_CONTROL_PACKET_HEADER;
+ packet.hdr.seqno = atomic_inc_return(&hp->seqno);
+ packet.hdr.len = 6;
packet.verb = VSV_CLOSE_PROTOCOL;
- pr_debug("%s: sending %i bytes\n", __func__, packet.len);
- dbg_dump_hex((uint8_t*)&packet, packet.len);
+ pr_debug("%s: sending %i bytes\n", __func__, packet.hdr.len);
+ dbg_dump_hex((uint8_t*)&packet, packet.hdr.len);
- hvc_put_chars(hp->vtermno, (char *)&packet, packet.len);
+ hvc_put_chars(hp->vtermno, (char *)&packet, packet.hdr.len);
}
static int hvsi_open(struct tty_struct *tty, struct file *filp)
--
1.7.1
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