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firewire: make PHY packet header format consistent

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Change the header of PHY packets to be sent to include a pseudo
transaction code.  This makes the header consistent with that of
received PHY packets, and allows at_context_queue_packet() and
log_ar_at_event() to see the packet type directly instead of having
to deduce it from the header length or even from the header contents.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
This commit is contained in:
Clemens Ladisch 2010-11-30 08:24:47 +01:00 committed by Stefan Richter
parent 8327b37b18
commit 5b06db166c
4 changed files with 33 additions and 29 deletions
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7
drivers/firewire/core-cdev.c
View File

@ -1501,9 +1501,10 @@ static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
e->client = client;
e->p.speed = SCODE_100;
e->p.generation = a->generation;
e->p.header[0] = a->data[0];
e->p.header[1] = a->data[1];
e->p.header_length = 8;
e->p.header[0] = TCODE_LINK_INTERNAL << 4;
e->p.header[1] = a->data[0];
e->p.header[2] = a->data[1];
e->p.header_length = 12;
e->p.callback = outbound_phy_packet_callback;
e->phy_packet.closure = a->closure;
e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_SENT;

7
drivers/firewire/core-transaction.c
View File

@ -423,7 +423,8 @@ static void transmit_phy_packet_callback(struct fw_packet *packet,
}
static struct fw_packet phy_config_packet = {
.header_length = 8,
.header_length = 12,
.header[0] = TCODE_LINK_INTERNAL << 4,
.payload_length = 0,
.speed = SCODE_100,
.callback = transmit_phy_packet_callback,
@ -451,8 +452,8 @@ void fw_send_phy_config(struct fw_card *card,
mutex_lock(&phy_config_mutex);
phy_config_packet.header[0] = data;
phy_config_packet.header[1] = ~data;
phy_config_packet.header[1] = data;
phy_config_packet.header[2] = ~data;
phy_config_packet.generation = generation;
INIT_COMPLETION(phy_config_done);

4
drivers/firewire/core.h
View File

@ -215,9 +215,11 @@ static inline bool is_next_generation(int new_generation, int old_generation)
/* -transaction */
#define TCODE_LINK_INTERNAL 0xe
#define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4)
#define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
#define TCODE_IS_LINK_INTERNAL(tcode) ((tcode) == 0xe)
#define TCODE_IS_LINK_INTERNAL(tcode) ((tcode) == TCODE_LINK_INTERNAL)
#define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0)
#define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0)
#define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4)

44
drivers/firewire/ohci.c
View File

@ -418,10 +418,6 @@ static const char *tcodes[] = {
[0xc] = "-reserved-", [0xd] = "-reserved-",
[0xe] = "link internal", [0xf] = "-reserved-",
};
static const char *phys[] = {
[0x0] = "phy config packet", [0x1] = "link-on packet",
[0x2] = "self-id packet", [0x3] = "-reserved-",
};
static void log_ar_at_event(char dir, int speed, u32 *header, int evt)
{
@ -440,12 +436,6 @@ static void log_ar_at_event(char dir, int speed, u32 *header, int evt)
return;
}
if (header[0] == ~header[1]) {
fw_notify("A%c %s, %s, %08x\n",
dir, evts[evt], phys[header[0] >> 30 & 0x3], header[0]);
return;
}
switch (tcode) {
case 0x0: case 0x6: case 0x8:
snprintf(specific, sizeof(specific), " = %08x",
@ -460,9 +450,13 @@ static void log_ar_at_event(char dir, int speed, u32 *header, int evt)
}
switch (tcode) {
case 0xe: case 0xa:
case 0xa:
fw_notify("A%c %s, %s\n", dir, evts[evt], tcodes[tcode]);
break;
case 0xe:
fw_notify("A%c %s, PHY %08x %08x\n",
dir, evts[evt], header[1], header[2]);
break;
case 0x0: case 0x1: case 0x4: case 0x5: case 0x9:
fw_notify("A%c spd %x tl %02x, "
"%04x -> %04x, %s, "
@ -1250,21 +1244,27 @@ static int at_context_queue_packet(struct context *ctx,
/*
* The DMA format for asyncronous link packets is different
* from the IEEE1394 layout, so shift the fields around
* accordingly. If header_length is 8, it's a PHY packet, to
* which we need to prepend an extra quadlet.
* accordingly.
*/
tcode = (packet->header[0] >> 4) & 0x0f;
header = (__le32 *) &d[1];
switch (packet->header_length) {
case 16:
case 12:
switch (tcode) {
case TCODE_WRITE_QUADLET_REQUEST:
case TCODE_WRITE_BLOCK_REQUEST:
case TCODE_WRITE_RESPONSE:
case TCODE_READ_QUADLET_REQUEST:
case TCODE_READ_BLOCK_REQUEST:
case TCODE_READ_QUADLET_RESPONSE:
case TCODE_READ_BLOCK_RESPONSE:
case TCODE_LOCK_REQUEST:
case TCODE_LOCK_RESPONSE:
header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
(packet->speed << 16));
header[1] = cpu_to_le32((packet->header[1] & 0xffff) |
(packet->header[0] & 0xffff0000));
header[2] = cpu_to_le32(packet->header[2]);
tcode = (packet->header[0] >> 4) & 0x0f;
if (TCODE_IS_BLOCK_PACKET(tcode))
header[3] = cpu_to_le32(packet->header[3]);
else
@ -1273,18 +1273,18 @@ static int at_context_queue_packet(struct context *ctx,
d[0].req_count = cpu_to_le16(packet->header_length);
break;
case 8:
case TCODE_LINK_INTERNAL:
header[0] = cpu_to_le32((OHCI1394_phy_tcode << 4) |
(packet->speed << 16));
header[1] = cpu_to_le32(packet->header[0]);
header[2] = cpu_to_le32(packet->header[1]);
header[1] = cpu_to_le32(packet->header[1]);
header[2] = cpu_to_le32(packet->header[2]);
d[0].req_count = cpu_to_le16(12);
if (is_ping_packet(packet->header))
if (is_ping_packet(&packet->header[1]))
d[0].control |= cpu_to_le16(DESCRIPTOR_PING);
break;
case 4:
case TCODE_STREAM_DATA:
header[0] = cpu_to_le32((packet->header[0] & 0xffff) |
(packet->speed << 16));
header[1] = cpu_to_le32(packet->header[0] & 0xffff0000);