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path: root/drivers/ieee1394/ieee1394_transactions.c
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Diffstat (limited to 'drivers/ieee1394/ieee1394_transactions.c')
-rw-r--r--drivers/ieee1394/ieee1394_transactions.c604
1 files changed, 0 insertions, 604 deletions
diff --git a/drivers/ieee1394/ieee1394_transactions.c b/drivers/ieee1394/ieee1394_transactions.c
deleted file mode 100644
index 0aa876360f9..00000000000
--- a/drivers/ieee1394/ieee1394_transactions.c
+++ /dev/null
@@ -1,604 +0,0 @@
-/*
- * IEEE 1394 for Linux
- *
- * Transaction support.
- *
- * Copyright (C) 1999 Andreas E. Bombe
- *
- * This code is licensed under the GPL. See the file COPYING in the root
- * directory of the kernel sources for details.
- */
-
-#include <linux/sched.h>
-#include <linux/bitops.h>
-#include <linux/smp_lock.h>
-#include <linux/interrupt.h>
-
-#include <asm/errno.h>
-
-#include "ieee1394.h"
-#include "ieee1394_types.h"
-#include "hosts.h"
-#include "ieee1394_core.h"
-#include "highlevel.h"
-#include "nodemgr.h"
-
-
-#define PREP_ASYNC_HEAD_ADDRESS(tc) \
- packet->tcode = tc; \
- packet->header[0] = (packet->node_id << 16) | (packet->tlabel << 10) \
- | (1 << 8) | (tc << 4); \
- packet->header[1] = (packet->host->node_id << 16) | (addr >> 32); \
- packet->header[2] = addr & 0xffffffff
-
-
-static void fill_async_readquad(struct hpsb_packet *packet, u64 addr)
-{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_READQ);
- packet->header_size = 12;
- packet->data_size = 0;
- packet->expect_response = 1;
-}
-
-static void fill_async_readblock(struct hpsb_packet *packet, u64 addr, int length)
-{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_READB);
- packet->header[3] = length << 16;
- packet->header_size = 16;
- packet->data_size = 0;
- packet->expect_response = 1;
-}
-
-static void fill_async_writequad(struct hpsb_packet *packet, u64 addr, quadlet_t data)
-{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEQ);
- packet->header[3] = data;
- packet->header_size = 16;
- packet->data_size = 0;
- packet->expect_response = 1;
-}
-
-static void fill_async_writeblock(struct hpsb_packet *packet, u64 addr, int length)
-{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_WRITEB);
- packet->header[3] = length << 16;
- packet->header_size = 16;
- packet->expect_response = 1;
- packet->data_size = length + (length % 4 ? 4 - (length % 4) : 0);
-}
-
-static void fill_async_lock(struct hpsb_packet *packet, u64 addr, int extcode,
- int length)
-{
- PREP_ASYNC_HEAD_ADDRESS(TCODE_LOCK_REQUEST);
- packet->header[3] = (length << 16) | extcode;
- packet->header_size = 16;
- packet->data_size = length;
- packet->expect_response = 1;
-}
-
-static void fill_iso_packet(struct hpsb_packet *packet, int length, int channel,
- int tag, int sync)
-{
- packet->header[0] = (length << 16) | (tag << 14) | (channel << 8)
- | (TCODE_ISO_DATA << 4) | sync;
-
- packet->header_size = 4;
- packet->data_size = length;
- packet->type = hpsb_iso;
- packet->tcode = TCODE_ISO_DATA;
-}
-
-static void fill_phy_packet(struct hpsb_packet *packet, quadlet_t data)
-{
- packet->header[0] = data;
- packet->header[1] = ~data;
- packet->header_size = 8;
- packet->data_size = 0;
- packet->expect_response = 0;
- packet->type = hpsb_raw; /* No CRC added */
- packet->speed_code = IEEE1394_SPEED_100; /* Force speed to be 100Mbps */
-}
-
-static void fill_async_stream_packet(struct hpsb_packet *packet, int length,
- int channel, int tag, int sync)
-{
- packet->header[0] = (length << 16) | (tag << 14) | (channel << 8)
- | (TCODE_STREAM_DATA << 4) | sync;
-
- packet->header_size = 4;
- packet->data_size = length;
- packet->type = hpsb_async;
- packet->tcode = TCODE_ISO_DATA;
-}
-
-/**
- * hpsb_get_tlabel - allocate a transaction label
- * @packet: the packet who's tlabel/tpool we set
- *
- * Every asynchronous transaction on the 1394 bus needs a transaction
- * label to match the response to the request. This label has to be
- * different from any other transaction label in an outstanding request to
- * the same node to make matching possible without ambiguity.
- *
- * There are 64 different tlabels, so an allocated tlabel has to be freed
- * with hpsb_free_tlabel() after the transaction is complete (unless it's
- * reused again for the same target node).
- *
- * Return value: Zero on success, otherwise non-zero. A non-zero return
- * generally means there are no available tlabels. If this is called out
- * of interrupt or atomic context, then it will sleep until can return a
- * tlabel.
- */
-int hpsb_get_tlabel(struct hpsb_packet *packet)
-{
- unsigned long flags;
- struct hpsb_tlabel_pool *tp;
-
- tp = &packet->host->tpool[packet->node_id & NODE_MASK];
-
- if (irqs_disabled() || in_atomic()) {
- if (down_trylock(&tp->count))
- return 1;
- } else {
- down(&tp->count);
- }
-
- spin_lock_irqsave(&tp->lock, flags);
-
- packet->tlabel = find_next_zero_bit(tp->pool, 64, tp->next);
- if (packet->tlabel > 63)
- packet->tlabel = find_first_zero_bit(tp->pool, 64);
- tp->next = (packet->tlabel + 1) % 64;
- /* Should _never_ happen */
- BUG_ON(test_and_set_bit(packet->tlabel, tp->pool));
- tp->allocations++;
- spin_unlock_irqrestore(&tp->lock, flags);
-
- return 0;
-}
-
-/**
- * hpsb_free_tlabel - free an allocated transaction label
- * @packet: packet whos tlabel/tpool needs to be cleared
- *
- * Frees the transaction label allocated with hpsb_get_tlabel(). The
- * tlabel has to be freed after the transaction is complete (i.e. response
- * was received for a split transaction or packet was sent for a unified
- * transaction).
- *
- * A tlabel must not be freed twice.
- */
-void hpsb_free_tlabel(struct hpsb_packet *packet)
-{
- unsigned long flags;
- struct hpsb_tlabel_pool *tp;
-
- tp = &packet->host->tpool[packet->node_id & NODE_MASK];
-
- BUG_ON(packet->tlabel > 63 || packet->tlabel < 0);
-
- spin_lock_irqsave(&tp->lock, flags);
- BUG_ON(!test_and_clear_bit(packet->tlabel, tp->pool));
- spin_unlock_irqrestore(&tp->lock, flags);
-
- up(&tp->count);
-}
-
-
-
-int hpsb_packet_success(struct hpsb_packet *packet)
-{
- switch (packet->ack_code) {
- case ACK_PENDING:
- switch ((packet->header[1] >> 12) & 0xf) {
- case RCODE_COMPLETE:
- return 0;
- case RCODE_CONFLICT_ERROR:
- return -EAGAIN;
- case RCODE_DATA_ERROR:
- return -EREMOTEIO;
- case RCODE_TYPE_ERROR:
- return -EACCES;
- case RCODE_ADDRESS_ERROR:
- return -EINVAL;
- default:
- HPSB_ERR("received reserved rcode %d from node %d",
- (packet->header[1] >> 12) & 0xf,
- packet->node_id);
- return -EAGAIN;
- }
- HPSB_PANIC("reached unreachable code 1 in %s", __FUNCTION__);
-
- case ACK_BUSY_X:
- case ACK_BUSY_A:
- case ACK_BUSY_B:
- return -EBUSY;
-
- case ACK_TYPE_ERROR:
- return -EACCES;
-
- case ACK_COMPLETE:
- if (packet->tcode == TCODE_WRITEQ
- || packet->tcode == TCODE_WRITEB) {
- return 0;
- } else {
- HPSB_ERR("impossible ack_complete from node %d "
- "(tcode %d)", packet->node_id, packet->tcode);
- return -EAGAIN;
- }
-
-
- case ACK_DATA_ERROR:
- if (packet->tcode == TCODE_WRITEB
- || packet->tcode == TCODE_LOCK_REQUEST) {
- return -EAGAIN;
- } else {
- HPSB_ERR("impossible ack_data_error from node %d "
- "(tcode %d)", packet->node_id, packet->tcode);
- return -EAGAIN;
- }
-
- case ACK_ADDRESS_ERROR:
- return -EINVAL;
-
- case ACK_TARDY:
- case ACK_CONFLICT_ERROR:
- case ACKX_NONE:
- case ACKX_SEND_ERROR:
- case ACKX_ABORTED:
- case ACKX_TIMEOUT:
- /* error while sending */
- return -EAGAIN;
-
- default:
- HPSB_ERR("got invalid ack %d from node %d (tcode %d)",
- packet->ack_code, packet->node_id, packet->tcode);
- return -EAGAIN;
- }
-
- HPSB_PANIC("reached unreachable code 2 in %s", __FUNCTION__);
-}
-
-struct hpsb_packet *hpsb_make_readpacket(struct hpsb_host *host, nodeid_t node,
- u64 addr, size_t length)
-{
- struct hpsb_packet *packet;
-
- if (length == 0)
- return NULL;
-
- packet = hpsb_alloc_packet(length);
- if (!packet)
- return NULL;
-
- packet->host = host;
- packet->node_id = node;
-
- if (hpsb_get_tlabel(packet)) {
- hpsb_free_packet(packet);
- return NULL;
- }
-
- if (length == 4)
- fill_async_readquad(packet, addr);
- else
- fill_async_readblock(packet, addr, length);
-
- return packet;
-}
-
-struct hpsb_packet *hpsb_make_writepacket (struct hpsb_host *host, nodeid_t node,
- u64 addr, quadlet_t *buffer, size_t length)
-{
- struct hpsb_packet *packet;
-
- if (length == 0)
- return NULL;
-
- packet = hpsb_alloc_packet(length);
- if (!packet)
- return NULL;
-
- if (length % 4) { /* zero padding bytes */
- packet->data[length >> 2] = 0;
- }
- packet->host = host;
- packet->node_id = node;
-
- if (hpsb_get_tlabel(packet)) {
- hpsb_free_packet(packet);
- return NULL;
- }
-
- if (length == 4) {
- fill_async_writequad(packet, addr, buffer ? *buffer : 0);
- } else {
- fill_async_writeblock(packet, addr, length);
- if (buffer)
- memcpy(packet->data, buffer, length);
- }
-
- return packet;
-}
-
-struct hpsb_packet *hpsb_make_streampacket(struct hpsb_host *host, u8 *buffer, int length,
- int channel, int tag, int sync)
-{
- struct hpsb_packet *packet;
-
- if (length == 0)
- return NULL;
-
- packet = hpsb_alloc_packet(length);
- if (!packet)
- return NULL;
-
- if (length % 4) { /* zero padding bytes */
- packet->data[length >> 2] = 0;
- }
- packet->host = host;
-
- if (hpsb_get_tlabel(packet)) {
- hpsb_free_packet(packet);
- return NULL;
- }
-
- fill_async_stream_packet(packet, length, channel, tag, sync);
- if (buffer)
- memcpy(packet->data, buffer, length);
-
- return packet;
-}
-
-struct hpsb_packet *hpsb_make_lockpacket(struct hpsb_host *host, nodeid_t node,
- u64 addr, int extcode, quadlet_t *data,
- quadlet_t arg)
-{
- struct hpsb_packet *p;
- u32 length;
-
- p = hpsb_alloc_packet(8);
- if (!p) return NULL;
-
- p->host = host;
- p->node_id = node;
- if (hpsb_get_tlabel(p)) {
- hpsb_free_packet(p);
- return NULL;
- }
-
- switch (extcode) {
- case EXTCODE_FETCH_ADD:
- case EXTCODE_LITTLE_ADD:
- length = 4;
- if (data)
- p->data[0] = *data;
- break;
- default:
- length = 8;
- if (data) {
- p->data[0] = arg;
- p->data[1] = *data;
- }
- break;
- }
- fill_async_lock(p, addr, extcode, length);
-
- return p;
-}
-
-struct hpsb_packet *hpsb_make_lock64packet(struct hpsb_host *host, nodeid_t node,
- u64 addr, int extcode, octlet_t *data,
- octlet_t arg)
-{
- struct hpsb_packet *p;
- u32 length;
-
- p = hpsb_alloc_packet(16);
- if (!p) return NULL;
-
- p->host = host;
- p->node_id = node;
- if (hpsb_get_tlabel(p)) {
- hpsb_free_packet(p);
- return NULL;
- }
-
- switch (extcode) {
- case EXTCODE_FETCH_ADD:
- case EXTCODE_LITTLE_ADD:
- length = 8;
- if (data) {
- p->data[0] = *data >> 32;
- p->data[1] = *data & 0xffffffff;
- }
- break;
- default:
- length = 16;
- if (data) {
- p->data[0] = arg >> 32;
- p->data[1] = arg & 0xffffffff;
- p->data[2] = *data >> 32;
- p->data[3] = *data & 0xffffffff;
- }
- break;
- }
- fill_async_lock(p, addr, extcode, length);
-
- return p;
-}
-
-struct hpsb_packet *hpsb_make_phypacket(struct hpsb_host *host,
- quadlet_t data)
-{
- struct hpsb_packet *p;
-
- p = hpsb_alloc_packet(0);
- if (!p) return NULL;
-
- p->host = host;
- fill_phy_packet(p, data);
-
- return p;
-}
-
-struct hpsb_packet *hpsb_make_isopacket(struct hpsb_host *host,
- int length, int channel,
- int tag, int sync)
-{
- struct hpsb_packet *p;
-
- p = hpsb_alloc_packet(length);
- if (!p) return NULL;
-
- p->host = host;
- fill_iso_packet(p, length, channel, tag, sync);
-
- p->generation = get_hpsb_generation(host);
-
- return p;
-}
-
-/*
- * FIXME - these functions should probably read from / write to user space to
- * avoid in kernel buffers for user space callers
- */
-
-int hpsb_read(struct hpsb_host *host, nodeid_t node, unsigned int generation,
- u64 addr, quadlet_t *buffer, size_t length)
-{
- struct hpsb_packet *packet;
- int retval = 0;
-
- if (length == 0)
- return -EINVAL;
-
- BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet
-
- packet = hpsb_make_readpacket(host, node, addr, length);
-
- if (!packet) {
- return -ENOMEM;
- }
-
- packet->generation = generation;
- retval = hpsb_send_packet_and_wait(packet);
- if (retval < 0)
- goto hpsb_read_fail;
-
- retval = hpsb_packet_success(packet);
-
- if (retval == 0) {
- if (length == 4) {
- *buffer = packet->header[3];
- } else {
- memcpy(buffer, packet->data, length);
- }
- }
-
-hpsb_read_fail:
- hpsb_free_tlabel(packet);
- hpsb_free_packet(packet);
-
- return retval;
-}
-
-
-int hpsb_write(struct hpsb_host *host, nodeid_t node, unsigned int generation,
- u64 addr, quadlet_t *buffer, size_t length)
-{
- struct hpsb_packet *packet;
- int retval;
-
- if (length == 0)
- return -EINVAL;
-
- BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet
-
- packet = hpsb_make_writepacket (host, node, addr, buffer, length);
-
- if (!packet)
- return -ENOMEM;
-
- packet->generation = generation;
- retval = hpsb_send_packet_and_wait(packet);
- if (retval < 0)
- goto hpsb_write_fail;
-
- retval = hpsb_packet_success(packet);
-
-hpsb_write_fail:
- hpsb_free_tlabel(packet);
- hpsb_free_packet(packet);
-
- return retval;
-}
-
-#if 0
-
-int hpsb_lock(struct hpsb_host *host, nodeid_t node, unsigned int generation,
- u64 addr, int extcode, quadlet_t *data, quadlet_t arg)
-{
- struct hpsb_packet *packet;
- int retval = 0;
-
- BUG_ON(in_interrupt()); // We can't be called in an interrupt, yet
-
- packet = hpsb_make_lockpacket(host, node, addr, extcode, data, arg);
- if (!packet)
- return -ENOMEM;
-
- packet->generation = generation;
- retval = hpsb_send_packet_and_wait(packet);
- if (retval < 0)
- goto hpsb_lock_fail;
-
- retval = hpsb_packet_success(packet);
-
- if (retval == 0) {
- *data = packet->data[0];
- }
-
-hpsb_lock_fail:
- hpsb_free_tlabel(packet);
- hpsb_free_packet(packet);
-
- return retval;
-}
-
-
-int hpsb_send_gasp(struct hpsb_host *host, int channel, unsigned int generation,
- quadlet_t *buffer, size_t length, u32 specifier_id,
- unsigned int version)
-{
- struct hpsb_packet *packet;
- int retval = 0;
- u16 specifier_id_hi = (specifier_id & 0x00ffff00) >> 8;
- u8 specifier_id_lo = specifier_id & 0xff;
-
- HPSB_VERBOSE("Send GASP: channel = %d, length = %Zd", channel, length);
-
- length += 8;
-
- packet = hpsb_make_streampacket(host, NULL, length, channel, 3, 0);
- if (!packet)
- return -ENOMEM;
-
- packet->data[0] = cpu_to_be32((host->node_id << 16) | specifier_id_hi);
- packet->data[1] = cpu_to_be32((specifier_id_lo << 24) | (version & 0x00ffffff));
-
- memcpy(&(packet->data[2]), buffer, length - 8);
-
- packet->generation = generation;
-
- packet->no_waiter = 1;
-
- retval = hpsb_send_packet(packet);
- if (retval < 0)
- hpsb_free_packet(packet);
-
- return retval;
-}
-
-#endif /* 0 */
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