-/* -*- c-basic-offset: 8 -*-
- *
- * fw-transaction.c - core IEEE1394 transaction logic
+/*
+ * Core IEEE1394 transaction logic
*
* Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net>
*
#include "fw-topology.h"
#include "fw-device.h"
-#define header_pri(pri) ((pri) << 0)
-#define header_tcode(tcode) ((tcode) << 4)
-#define header_retry(retry) ((retry) << 8)
-#define header_tlabel(tlabel) ((tlabel) << 10)
-#define header_destination(destination) ((destination) << 16)
-#define header_source(source) ((source) << 16)
-#define header_rcode(rcode) ((rcode) << 12)
-#define header_offset_high(offset_high) ((offset_high) << 0)
-#define header_data_length(length) ((length) << 16)
-#define header_extended_tcode(tcode) ((tcode) << 0)
-
-#define header_get_tcode(q) (((q) >> 4) & 0x0f)
-#define header_get_tlabel(q) (((q) >> 10) & 0x3f)
-#define header_get_rcode(q) (((q) >> 4) & 0x0f)
-#define header_get_destination(q) (((q) >> 16) & 0xffff)
-#define header_get_source(q) (((q) >> 16) & 0xffff)
-#define header_get_offset_high(q) (((q) >> 0) & 0xffff)
-#define header_get_data_length(q) (((q) >> 16) & 0xffff)
-#define header_get_extended_tcode(q) (((q) >> 0) & 0xffff)
-
-#define phy_config_gap_count(gap_count) (((gap_count) << 16) | (1 << 22))
-#define phy_config_root_id(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23))
-#define phy_identifier(id) ((id) << 30)
-
-static void
-close_transaction(struct fw_transaction *t, struct fw_card *card, int rcode,
- u32 * payload, size_t length)
+#define HEADER_PRI(pri) ((pri) << 0)
+#define HEADER_TCODE(tcode) ((tcode) << 4)
+#define HEADER_RETRY(retry) ((retry) << 8)
+#define HEADER_TLABEL(tlabel) ((tlabel) << 10)
+#define HEADER_DESTINATION(destination) ((destination) << 16)
+#define HEADER_SOURCE(source) ((source) << 16)
+#define HEADER_RCODE(rcode) ((rcode) << 12)
+#define HEADER_OFFSET_HIGH(offset_high) ((offset_high) << 0)
+#define HEADER_DATA_LENGTH(length) ((length) << 16)
+#define HEADER_EXTENDED_TCODE(tcode) ((tcode) << 0)
+
+#define HEADER_GET_TCODE(q) (((q) >> 4) & 0x0f)
+#define HEADER_GET_TLABEL(q) (((q) >> 10) & 0x3f)
+#define HEADER_GET_RCODE(q) (((q) >> 12) & 0x0f)
+#define HEADER_GET_DESTINATION(q) (((q) >> 16) & 0xffff)
+#define HEADER_GET_SOURCE(q) (((q) >> 16) & 0xffff)
+#define HEADER_GET_OFFSET_HIGH(q) (((q) >> 0) & 0xffff)
+#define HEADER_GET_DATA_LENGTH(q) (((q) >> 16) & 0xffff)
+#define HEADER_GET_EXTENDED_TCODE(q) (((q) >> 0) & 0xffff)
+
+#define PHY_CONFIG_GAP_COUNT(gap_count) (((gap_count) << 16) | (1 << 22))
+#define PHY_CONFIG_ROOT_ID(node_id) ((((node_id) & 0x3f) << 24) | (1 << 23))
+#define PHY_IDENTIFIER(id) ((id) << 30)
+
+static int
+close_transaction(struct fw_transaction *transaction,
+ struct fw_card *card, int rcode,
+ u32 *payload, size_t length)
{
+ struct fw_transaction *t;
unsigned long flags;
spin_lock_irqsave(&card->lock, flags);
- card->tlabel_mask &= ~(1 << t->tlabel);
- list_del(&t->link);
+ list_for_each_entry(t, &card->transaction_list, link) {
+ if (t == transaction) {
+ list_del(&t->link);
+ card->tlabel_mask &= ~(1 << t->tlabel);
+ break;
+ }
+ }
spin_unlock_irqrestore(&card->lock, flags);
- t->callback(card, rcode, payload, length, t->callback_data);
+ if (&t->link != &card->transaction_list) {
+ t->callback(card, rcode, payload, length, t->callback_data);
+ return 0;
+ }
+
+ return -ENOENT;
+}
+
+/*
+ * Only valid for transactions that are potentially pending (ie have
+ * been sent).
+ */
+int
+fw_cancel_transaction(struct fw_card *card,
+ struct fw_transaction *transaction)
+{
+ /*
+ * Cancel the packet transmission if it's still queued. That
+ * will call the packet transmission callback which cancels
+ * the transaction.
+ */
+
+ if (card->driver->cancel_packet(card, &transaction->packet) == 0)
+ return 0;
+
+ /*
+ * If the request packet has already been sent, we need to see
+ * if the transaction is still pending and remove it in that case.
+ */
+
+ return close_transaction(transaction, card, RCODE_CANCELLED, NULL, 0);
}
+EXPORT_SYMBOL(fw_cancel_transaction);
static void
transmit_complete_callback(struct fw_packet *packet,
close_transaction(t, card, RCODE_TYPE_ERROR, NULL, 0);
break;
default:
- /* In this case the ack is really a juju specific
- * rcode, so just forward that to the callback. */
+ /*
+ * In this case the ack is really a juju specific
+ * rcode, so just forward that to the callback.
+ */
close_transaction(t, card, status, NULL, 0);
break;
}
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;
ext_tcode = 0;
packet->header[0] =
- header_retry(RETRY_X) |
- header_tlabel(tlabel) |
- header_tcode(tcode) |
- header_destination(node_id);
+ HEADER_RETRY(RETRY_X) |
+ HEADER_TLABEL(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;
case TCODE_LOCK_REQUEST:
case TCODE_WRITE_BLOCK_REQUEST:
packet->header[3] =
- header_data_length(length) |
- header_extended_tcode(ext_tcode);
+ HEADER_DATA_LENGTH(length) |
+ HEADER_EXTENDED_TCODE(ext_tcode);
packet->header_length = 16;
packet->payload = payload;
packet->payload_length = length;
case TCODE_READ_BLOCK_REQUEST:
packet->header[3] =
- header_data_length(length) |
- header_extended_tcode(ext_tcode);
+ HEADER_DATA_LENGTH(length) |
+ HEADER_EXTENDED_TCODE(ext_tcode);
packet->header_length = 16;
packet->payload_length = 0;
break;
packet->speed = speed;
packet->generation = generation;
+ packet->ack = 0;
}
/**
*
* @param card the card from which to send the request
* @param tcode the tcode for this transaction. Do not use
- * TCODE_LOCK_REQUEST directly, insted use TCODE_LOCK_MASK_SWAP
+ * TCODE_LOCK_REQUEST directly, instead use TCODE_LOCK_MASK_SWAP
* etc. to specify tcode and ext_tcode.
* @param node_id the destination node ID (bus ID and PHY ID concatenated)
* @param generation the generation for which node_id is valid
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. */
+ /*
+ * Bump the flush timer up 100ms first of all so we
+ * don't race with a flush timer callback.
+ */
mod_timer(&card->flush_timer, jiffies + DIV_ROUND_UP(HZ, 10));
- /* Allocate tlabel from the bitmap and put the transaction on
- * the list while holding the card spinlock. */
+ /*
+ * Allocate tlabel from the bitmap and put the transaction on
+ * the list while holding the card spinlock.
+ */
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);
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);
{
struct fw_packet *packet;
- packet = kzalloc(sizeof *packet, GFP_ATOMIC);
+ packet = kzalloc(sizeof(*packet), GFP_ATOMIC);
if (packet == NULL)
return;
{
u32 q;
- q = phy_identifier(PHY_PACKET_CONFIG) |
- phy_config_root_id(node_id) |
- phy_config_gap_count(gap_count);
+ q = PHY_IDENTIFIER(PHY_PACKET_CONFIG) |
+ PHY_CONFIG_ROOT_ID(node_id) |
+ PHY_CONFIG_GAP_COUNT(gap_count);
send_phy_packet(card, q, generation);
}
card->tlabel_mask = 0;
spin_unlock_irqrestore(&card->lock, flags);
- list_for_each_entry_safe(t, next, &list, link)
+ list_for_each_entry_safe(t, next, &list, link) {
+ card->driver->cancel_packet(card, &t->packet);
+
+ /*
+ * At this point cancel_packet will never call the
+ * transaction callback, since we just took all the
+ * transactions out of the list. So do it here.
+ */
t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data);
+ }
}
static struct fw_address_handler *
* controller. When a request is received that falls within the
* specified address range, the specified callback is invoked. The
* parameters passed to the callback give the details of the
- * particular request
+ * particular request.
+ *
+ * Return value: 0 on success, non-zero otherwise.
+ * The start offset of the handler's address region is determined by
+ * fw_core_add_address_handler() and is returned in handler->offset.
+ * The offset is quadlet-aligned.
*/
int
fw_core_add_address_handler(struct fw_address_handler *handler,
spin_lock_irqsave(&address_handler_lock, flags);
- handler->offset = region->start;
+ handler->offset = roundup(region->start, 4);
while (handler->offset + handler->length <= region->end) {
other =
lookup_overlapping_address_handler(&address_handler_list,
handler->offset,
handler->length);
if (other != NULL) {
- handler->offset += other->length;
+ handler->offset =
+ roundup(other->offset + other->length, 4);
} else {
list_add_tail(&handler->link, &address_handler_list);
ret = 0;
{
int tcode, tlabel, extended_tcode, source, destination;
- tcode = header_get_tcode(request_header[0]);
- tlabel = header_get_tlabel(request_header[0]);
- source = header_get_destination(request_header[0]);
- destination = header_get_source(request_header[1]);
- extended_tcode = header_get_extended_tcode(request_header[3]);
+ tcode = HEADER_GET_TCODE(request_header[0]);
+ tlabel = HEADER_GET_TLABEL(request_header[0]);
+ source = HEADER_GET_DESTINATION(request_header[0]);
+ destination = HEADER_GET_SOURCE(request_header[1]);
+ extended_tcode = HEADER_GET_EXTENDED_TCODE(request_header[3]);
response->header[0] =
- header_retry(RETRY_1) |
- header_tlabel(tlabel) |
- header_destination(destination);
+ HEADER_RETRY(RETRY_1) |
+ HEADER_TLABEL(tlabel) |
+ HEADER_DESTINATION(destination);
response->header[1] =
- header_source(source) |
- header_rcode(rcode);
+ HEADER_SOURCE(source) |
+ HEADER_RCODE(rcode);
response->header[2] = 0;
switch (tcode) {
case TCODE_WRITE_QUADLET_REQUEST:
case TCODE_WRITE_BLOCK_REQUEST:
- response->header[0] |= header_tcode(TCODE_WRITE_RESPONSE);
+ response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE);
response->header_length = 12;
response->payload_length = 0;
break;
case TCODE_READ_QUADLET_REQUEST:
response->header[0] |=
- header_tcode(TCODE_READ_QUADLET_RESPONSE);
+ HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE);
if (payload != NULL)
response->header[3] = *(u32 *)payload;
else
case TCODE_READ_BLOCK_REQUEST:
case TCODE_LOCK_REQUEST:
- response->header[0] |= header_tcode(tcode + 2);
+ response->header[0] |= HEADER_TCODE(tcode + 2);
response->header[3] =
- header_data_length(length) |
- header_extended_tcode(extended_tcode);
+ HEADER_DATA_LENGTH(length) |
+ HEADER_EXTENDED_TCODE(extended_tcode);
response->header_length = 16;
response->payload = payload;
response->payload_length = length;
u32 *data, length;
int request_tcode, t;
- request_tcode = header_get_tcode(p->header[0]);
+ request_tcode = HEADER_GET_TCODE(p->header[0]);
switch (request_tcode) {
case TCODE_WRITE_QUADLET_REQUEST:
data = &p->header[3];
case TCODE_WRITE_BLOCK_REQUEST:
case TCODE_LOCK_REQUEST:
data = p->payload;
- length = header_get_data_length(p->header[3]);
+ length = HEADER_GET_DATA_LENGTH(p->header[3]);
break;
case TCODE_READ_QUADLET_REQUEST:
case TCODE_READ_BLOCK_REQUEST:
data = NULL;
- length = header_get_data_length(p->header[3]);
+ length = HEADER_GET_DATA_LENGTH(p->header[3]);
break;
default:
return NULL;
}
- request = kmalloc(sizeof *request + length, GFP_ATOMIC);
+ request = kmalloc(sizeof(*request) + length, GFP_ATOMIC);
if (request == NULL)
return NULL;
request->response.speed = p->speed;
request->response.timestamp = t;
request->response.generation = p->generation;
+ request->response.ack = 0;
request->response.callback = free_response_callback;
request->ack = p->ack;
request->length = length;
if (data)
- memcpy(request->data, p->payload, length);
+ memcpy(request->data, data, length);
- memcpy(request->request_header, p->header, sizeof p->header);
+ memcpy(request->request_header, p->header, sizeof(p->header));
return request;
}
void
fw_send_response(struct fw_card *card, struct fw_request *request, int rcode)
{
- /* Broadcast packets are reported as ACK_COMPLETE, so this
+ /*
+ * Broadcast packets are reported as ACK_COMPLETE, so this
* check is sufficient to ensure we don't send response to
- * broadcast packets or posted writes. */
- if (request->ack != ACK_PENDING)
+ * broadcast packets or posted writes.
+ */
+ if (request->ack != ACK_PENDING) {
+ kfree(request);
return;
+ }
if (rcode == RCODE_COMPLETE)
fw_fill_response(&request->response, request->request_header,
unsigned long flags;
int tcode, destination, source;
- if (p->payload_length > 2048) {
- /* FIXME: send error response. */
- return;
- }
-
if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
return;
offset =
((unsigned long long)
- header_get_offset_high(p->header[1]) << 32) | p->header[2];
- tcode = header_get_tcode(p->header[0]);
- destination = header_get_destination(p->header[0]);
- source = header_get_source(p->header[0]);
+ HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2];
+ tcode = HEADER_GET_TCODE(p->header[0]);
+ destination = HEADER_GET_DESTINATION(p->header[0]);
+ source = HEADER_GET_SOURCE(p->header[0]);
spin_lock_irqsave(&address_handler_lock, flags);
handler = lookup_enclosing_address_handler(&address_handler_list,
offset, request->length);
spin_unlock_irqrestore(&address_handler_lock, flags);
- /* FIXME: lookup the fw_node corresponding to the sender of
+ /*
+ * FIXME: lookup the fw_node corresponding to the sender of
* this request and pass that to the address handler instead
* of the node ID. We may also want to move the address
* allocations to fw_node so we only do this callback if the
- * upper layers registered it for this node. */
+ * upper layers registered it for this node.
+ */
if (handler == NULL)
fw_send_response(card, request, RCODE_ADDRESS_ERROR);
size_t data_length;
int tcode, tlabel, destination, source, rcode;
- tcode = header_get_tcode(p->header[0]);
- tlabel = header_get_tlabel(p->header[0]);
- destination = header_get_destination(p->header[0]);
- source = header_get_source(p->header[1]);
- rcode = header_get_rcode(p->header[1]);
+ tcode = HEADER_GET_TCODE(p->header[0]);
+ tlabel = HEADER_GET_TLABEL(p->header[0]);
+ destination = HEADER_GET_DESTINATION(p->header[0]);
+ source = HEADER_GET_SOURCE(p->header[1]);
+ rcode = HEADER_GET_RCODE(p->header[1]);
spin_lock_irqsave(&card->lock, flags);
list_for_each_entry(t, &card->transaction_list, link) {
spin_unlock_irqrestore(&card->lock, flags);
if (&t->link == &card->transaction_list) {
- fw_notify("Unsolicited response\n");
+ fw_notify("Unsolicited response (source %x, tlabel %x)\n",
+ source, tlabel);
return;
}
- /* FIXME: sanity check packet, is length correct, does tcodes
- * and addresses match. */
+ /*
+ * FIXME: sanity check packet, is length correct, does tcodes
+ * and addresses match.
+ */
switch (tcode) {
case TCODE_READ_QUADLET_RESPONSE:
case TCODE_READ_BLOCK_RESPONSE:
case TCODE_LOCK_RESPONSE:
data = p->payload;
- data_length = header_get_data_length(p->header[3]);
+ data_length = HEADER_GET_DATA_LENGTH(p->header[3]);
break;
default:
}
EXPORT_SYMBOL(fw_core_handle_response);
+static 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 = 0x200,
+ .address_callback = handle_topology_map,
+};
+
+static const struct fw_address_region registers_region =
+ { .start = 0xfffff0000000ull, .end = 0xfffff0000400ull, };
+
+static void
+handle_registers(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 reg = offset - CSR_REGISTER_BASE;
+ unsigned long long bus_time;
+ __be32 *data = payload;
+
+ switch (reg) {
+ case CSR_CYCLE_TIME:
+ case CSR_BUS_TIME:
+ if (!TCODE_IS_READ_REQUEST(tcode) || length != 4) {
+ fw_send_response(card, request, RCODE_TYPE_ERROR);
+ break;
+ }
+
+ bus_time = card->driver->get_bus_time(card);
+ if (reg == CSR_CYCLE_TIME)
+ *data = cpu_to_be32(bus_time);
+ else
+ *data = cpu_to_be32(bus_time >> 25);
+ fw_send_response(card, request, RCODE_COMPLETE);
+ break;
+
+ case CSR_BUS_MANAGER_ID:
+ case CSR_BANDWIDTH_AVAILABLE:
+ case CSR_CHANNELS_AVAILABLE_HI:
+ case CSR_CHANNELS_AVAILABLE_LO:
+ /*
+ * FIXME: these are handled by the OHCI hardware and
+ * the stack never sees these request. If we add
+ * support for a new type of controller that doesn't
+ * handle this in hardware we need to deal with these
+ * transactions.
+ */
+ BUG();
+ break;
+
+ case CSR_BUSY_TIMEOUT:
+ /* FIXME: Implement this. */
+ default:
+ fw_send_response(card, request, RCODE_ADDRESS_ERROR);
+ break;
+ }
+}
+
+static struct fw_address_handler registers = {
+ .length = 0x400,
+ .address_callback = handle_registers,
+};
+
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
MODULE_DESCRIPTION("Core IEEE1394 transaction logic");
MODULE_LICENSE("GPL");
-static const u32 vendor_textual_descriptor_data[] = {
+static const u32 vendor_textual_descriptor[] = {
/* textual descriptor leaf () */
- 0x00080000,
+ 0x00060000,
0x00000000,
0x00000000,
0x4c696e75, /* L i n u */
0x78204669, /* x F i */
0x72657769, /* r e w i */
- 0x72652028, /* r e ( */
- 0x4a554a55, /* J U J U */
- 0x29000000, /* ) */
+ 0x72650000, /* r e */
};
-static struct fw_descriptor vendor_textual_descriptor = {
- .length = ARRAY_SIZE(vendor_textual_descriptor_data),
+static const u32 model_textual_descriptor[] = {
+ /* model descriptor leaf () */
+ 0x00030000,
+ 0x00000000,
+ 0x00000000,
+ 0x4a756a75, /* J u j u */
+};
+
+static struct fw_descriptor vendor_id_descriptor = {
+ .length = ARRAY_SIZE(vendor_textual_descriptor),
+ .immediate = 0x03d00d1e,
.key = 0x81000000,
- .data = vendor_textual_descriptor_data,
+ .data = vendor_textual_descriptor,
+};
+
+static struct fw_descriptor model_id_descriptor = {
+ .length = ARRAY_SIZE(model_textual_descriptor),
+ .immediate = 0x17000001,
+ .key = 0x81000000,
+ .data = model_textual_descriptor,
};
static int __init fw_core_init(void)
if (retval < 0)
return retval;
+ fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops);
+ if (fw_cdev_major < 0) {
+ bus_unregister(&fw_bus_type);
+ return fw_cdev_major;
+ }
+
+ retval = fw_core_add_address_handler(&topology_map,
+ &topology_map_region);
+ BUG_ON(retval < 0);
+
+ retval = fw_core_add_address_handler(®isters,
+ ®isters_region);
+ BUG_ON(retval < 0);
+
/* Add the vendor textual descriptor. */
- retval = fw_core_add_descriptor(&vendor_textual_descriptor);
+ retval = fw_core_add_descriptor(&vendor_id_descriptor);
+ BUG_ON(retval < 0);
+ retval = fw_core_add_descriptor(&model_id_descriptor);
BUG_ON(retval < 0);
return 0;
static void __exit fw_core_cleanup(void)
{
+ unregister_chrdev(fw_cdev_major, "firewire");
bus_unregister(&fw_bus_type);
}
projects / mirror_ubuntu-artful-kernel.git / blobdiff