Commit 473d28c7 authored by Kristian Høgsberg's avatar Kristian Høgsberg Committed by Stefan Richter

firewire: Implement topology map and fix a couple of loopback bugs.

Signed-off-by: default avatarKristian Høgsberg <krh@redhat.com>
Signed-off-by: default avatarStefan Richter <stefanr@s5r6.in-berlin.de>
parent 7c6e647d
......@@ -30,7 +30,7 @@
* polynomial, but we need the ITU-T (or CCITT) polynomial (0x1021).
* The implementation below works on an array of host-endian u32
* words, assuming they'll be transmited msb first. */
static u16
u16
crc16_itu_t(const u32 *buffer, size_t length)
{
int shift, i;
......
......@@ -813,8 +813,10 @@ handle_local_request(struct context *ctx, struct fw_packet *packet)
u64 offset;
u32 csr;
if (ctx == &ctx->ohci->at_request_ctx) {
packet->ack = ACK_PENDING;
packet->callback(packet, &ctx->ohci->card, packet->ack);
}
offset =
((unsigned long long)
......@@ -839,6 +841,11 @@ handle_local_request(struct context *ctx, struct fw_packet *packet)
fw_core_handle_response(&ctx->ohci->card, packet);
break;
}
if (ctx == &ctx->ohci->at_response_ctx) {
packet->ack = ACK_COMPLETE;
packet->callback(packet, &ctx->ohci->card, packet->ack);
}
}
static void
......
......@@ -163,11 +163,12 @@ static void update_hop_count(struct fw_node *node)
* internally consistent. On succcess this funtions returns the
* fw_node corresponding to the local card otherwise NULL.
*/
static struct fw_node *build_tree(struct fw_card *card)
static struct fw_node *build_tree(struct fw_card *card,
u32 *sid, int self_id_count)
{
struct fw_node *node, *child, *local_node;
struct list_head stack, *h;
u32 *sid, *next_sid, *end, q;
u32 *next_sid, *end, q;
int i, port_count, child_port_count, phy_id, parent_count, stack_depth;
int gap_count, topology_type;
......@@ -175,8 +176,7 @@ static struct fw_node *build_tree(struct fw_card *card)
node = NULL;
INIT_LIST_HEAD(&stack);
stack_depth = 0;
sid = card->self_ids;
end = sid + card->self_id_count;
end = sid + self_id_count;
phy_id = 0;
card->irm_node = NULL;
gap_count = self_id_gap_count(*sid);
......@@ -460,6 +460,20 @@ update_tree(struct fw_card *card, struct fw_node *root)
}
}
static void
update_topology_map(struct fw_card *card, u32 *self_ids, int self_id_count)
{
int node_count;
u32 crc;
card->topology_map[1]++;
node_count = (card->root_node->node_id & 0x3f) + 1;
card->topology_map[2] = (node_count << 16) | self_id_count;
crc = crc16_itu_t(card->topology_map + 1, self_id_count + 2);
card->topology_map[0] = ((self_id_count + 2) << 16) | crc;
memcpy(&card->topology_map[3], self_ids, self_id_count * 4);
}
void
fw_core_handle_bus_reset(struct fw_card *card,
int node_id, int generation,
......@@ -479,13 +493,13 @@ fw_core_handle_bus_reset(struct fw_card *card,
card->bm_retries = 0;
card->node_id = node_id;
card->self_id_count = self_id_count;
card->generation = generation;
memcpy(card->self_ids, self_ids, self_id_count * 4);
card->reset_jiffies = jiffies;
schedule_delayed_work(&card->work, 0);
local_node = build_tree(card);
local_node = build_tree(card, self_ids, self_id_count);
update_topology_map(card, self_ids, self_id_count);
card->color++;
......
......@@ -88,4 +88,7 @@ fw_node_put(struct fw_node *node)
void
fw_destroy_nodes(struct fw_card *card);
u16
crc16_itu_t(const u32 *buffer, size_t length);
#endif /* __fw_topology_h */
......@@ -140,7 +140,7 @@ transmit_complete_callback(struct fw_packet *packet,
static void
fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
int node_id, int generation, int speed,
int node_id, int source_id, int generation, int speed,
unsigned long long offset, void *payload, size_t length)
{
int ext_tcode;
......@@ -157,7 +157,7 @@ fw_fill_request(struct fw_packet *packet, int tcode, int tlabel,
header_tcode(tcode) |
header_destination(node_id);
packet->header[1] =
header_offset_high(offset >> 32) | header_source(0);
header_offset_high(offset >> 32) | header_source(source_id);
packet->header[2] =
offset;
......@@ -241,7 +241,7 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
fw_transaction_callback_t callback, void *callback_data)
{
unsigned long flags;
int tlabel;
int tlabel, source;
/* Bump the flush timer up 100ms first of all so we
* don't race with a flush timer callback. */
......@@ -253,6 +253,7 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
spin_lock_irqsave(&card->lock, flags);
source = card->node_id;
tlabel = card->current_tlabel;
if (card->tlabel_mask & (1 << tlabel)) {
spin_unlock_irqrestore(&card->lock, flags);
......@@ -274,7 +275,8 @@ fw_send_request(struct fw_card *card, struct fw_transaction *t,
t->callback_data = callback_data;
fw_fill_request(&t->packet, tcode, t->tlabel,
node_id, generation, speed, offset, payload, length);
node_id, source, generation,
speed, offset, payload, length);
t->packet.callback = transmit_complete_callback;
card->driver->send_request(card, &t->packet);
......@@ -716,6 +718,44 @@ fw_core_handle_response(struct fw_card *card, struct fw_packet *p)
}
EXPORT_SYMBOL(fw_core_handle_response);
const struct fw_address_region topology_map_region =
{ .start = 0xfffff0001000ull, .end = 0xfffff0001400ull, };
static void
handle_topology_map(struct fw_card *card, struct fw_request *request,
int tcode, int destination, int source,
int generation, int speed,
unsigned long long offset,
void *payload, size_t length, void *callback_data)
{
int i, start, end;
u32 *map;
if (!TCODE_IS_READ_REQUEST(tcode)) {
fw_send_response(card, request, RCODE_TYPE_ERROR);
return;
}
if ((offset & 3) > 0 || (length & 3) > 0) {
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
return;
}
start = (offset - topology_map_region.start) / 4;
end = start + length / 4;
map = payload;
for (i = 0; i < length / 4; i++)
map[i] = cpu_to_be32(card->topology_map[start + i]);
fw_send_response(card, request, RCODE_COMPLETE);
}
static struct fw_address_handler topology_map = {
.length = 0x400,
.address_callback = handle_topology_map,
};
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
MODULE_LICENSE("GPL");
......@@ -767,6 +807,10 @@ static int __init fw_core_init(void)
return fw_cdev_major;
}
retval = fw_core_add_address_handler(&topology_map,
&topology_map_region);
BUG_ON(retval < 0);
/* Add the vendor textual descriptor. */
retval = fw_core_add_descriptor(&vendor_id_descriptor);
BUG_ON(retval < 0);
......
......@@ -285,9 +285,10 @@ struct fw_card {
int link_speed;
int config_rom_generation;
/* We need to store up to 4 self ID for a maximum of 63 devices. */
/* We need to store up to 4 self ID for a maximum of 63
* devices plus 3 words for the topology map header. */
int self_id_count;
u32 self_ids[252];
u32 topology_map[252 + 3];
spinlock_t lock; /* Take this lock when handling the lists in
* this struct. */
......
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