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powerpc/pseries: Factor HVSI header struct in packet definitions 

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@kernel.crashing.org>
This commit is contained in:
Benjamin Herrenschmidt 2011-06-16 15:08:24 +00:00
parent 725e789f22
commit 048bee7718
2 changed files with 37 additions and 45 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/powerpc/include/asm/hvsi.h
View File

@ -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 {

66
drivers/tty/hvc/hvsi.c
View File

@ -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)