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drivers/firewire/core-transaction.c
35.4 KB
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/* * Core IEEE1394 transaction logic |
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* * Copyright (C) 2004-2006 Kristian Hoegsberg <krh@bitplanet.net> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
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#include <linux/bug.h> |
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#include <linux/completion.h> |
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#include <linux/device.h> #include <linux/errno.h> |
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#include <linux/firewire.h> |
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#include <linux/firewire-constants.h> #include <linux/fs.h> #include <linux/init.h> |
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#include <linux/idr.h> |
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#include <linux/jiffies.h> |
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#include <linux/kernel.h> |
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#include <linux/list.h> |
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#include <linux/module.h> |
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#include <linux/rculist.h> |
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#include <linux/slab.h> #include <linux/spinlock.h> #include <linux/string.h> #include <linux/timer.h> #include <linux/types.h> |
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#include <linux/workqueue.h> |
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#include <asm/byteorder.h> |
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|
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#include "core.h" |
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|
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#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) |
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#define HEADER_DESTINATION_IS_BROADCAST(q) \ (((q) & HEADER_DESTINATION(0x3f)) == HEADER_DESTINATION(0x3f)) |
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#define PHY_PACKET_CONFIG 0x0 #define PHY_PACKET_LINK_ON 0x1 #define PHY_PACKET_SELF_ID 0x2 |
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#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) |
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|
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/* returns 0 if the split timeout handler is already running */ static int try_cancel_split_timeout(struct fw_transaction *t) { if (t->is_split_transaction) return del_timer(&t->split_timeout_timer); else return 1; } |
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static int close_transaction(struct fw_transaction *transaction, |
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struct fw_card *card, int rcode) |
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{ |
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struct fw_transaction *t; |
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unsigned long flags; spin_lock_irqsave(&card->lock, flags); |
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list_for_each_entry(t, &card->transaction_list, link) { if (t == transaction) { |
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if (!try_cancel_split_timeout(t)) { |
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spin_unlock_irqrestore(&card->lock, flags); goto timed_out; } |
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list_del_init(&t->link); |
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card->tlabel_mask &= ~(1ULL << t->tlabel); |
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break; } } |
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spin_unlock_irqrestore(&card->lock, flags); |
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if (&t->link != &card->transaction_list) { |
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t->callback(card, rcode, NULL, 0, t->callback_data); |
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return 0; } |
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timed_out: |
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return -ENOENT; |
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} |
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/* * Only valid for transactions that are potentially pending (ie have * been sent). */ |
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int fw_cancel_transaction(struct fw_card *card, struct fw_transaction *transaction) |
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{ |
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/* * Cancel the packet transmission if it's still queued. That |
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* will call the packet transmission callback which cancels |
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* the transaction. */ |
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if (card->driver->cancel_packet(card, &transaction->packet) == 0) return 0; |
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/* * If the request packet has already been sent, we need to see * if the transaction is still pending and remove it in that case. */ |
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|
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return close_transaction(transaction, card, RCODE_CANCELLED); |
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} EXPORT_SYMBOL(fw_cancel_transaction); |
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static void split_transaction_timeout_callback(unsigned long data) { struct fw_transaction *t = (struct fw_transaction *)data; struct fw_card *card = t->card; unsigned long flags; spin_lock_irqsave(&card->lock, flags); if (list_empty(&t->link)) { spin_unlock_irqrestore(&card->lock, flags); return; } list_del(&t->link); card->tlabel_mask &= ~(1ULL << t->tlabel); spin_unlock_irqrestore(&card->lock, flags); |
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t->callback(card, RCODE_CANCELLED, NULL, 0, t->callback_data); } |
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static void start_split_transaction_timeout(struct fw_transaction *t, struct fw_card *card) { unsigned long flags; spin_lock_irqsave(&card->lock, flags); if (list_empty(&t->link) || WARN_ON(t->is_split_transaction)) { spin_unlock_irqrestore(&card->lock, flags); return; } t->is_split_transaction = true; mod_timer(&t->split_timeout_timer, jiffies + card->split_timeout_jiffies); spin_unlock_irqrestore(&card->lock, flags); } |
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static void transmit_complete_callback(struct fw_packet *packet, struct fw_card *card, int status) |
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{ struct fw_transaction *t = container_of(packet, struct fw_transaction, packet); switch (status) { case ACK_COMPLETE: |
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close_transaction(t, card, RCODE_COMPLETE); |
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break; case ACK_PENDING: |
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start_split_transaction_timeout(t, card); |
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break; case ACK_BUSY_X: case ACK_BUSY_A: case ACK_BUSY_B: |
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close_transaction(t, card, RCODE_BUSY); |
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break; case ACK_DATA_ERROR: |
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close_transaction(t, card, RCODE_DATA_ERROR); |
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break; |
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case ACK_TYPE_ERROR: |
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close_transaction(t, card, RCODE_TYPE_ERROR); |
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break; default: |
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/* * In this case the ack is really a juju specific * rcode, so just forward that to the callback. */ |
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close_transaction(t, card, status); |
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break; } } |
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static void fw_fill_request(struct fw_packet *packet, int tcode, int tlabel, |
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int destination_id, int source_id, int generation, int speed, |
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unsigned long long offset, void *payload, size_t length) |
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{ int ext_tcode; |
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if (tcode == TCODE_STREAM_DATA) { packet->header[0] = HEADER_DATA_LENGTH(length) | destination_id | HEADER_TCODE(TCODE_STREAM_DATA); packet->header_length = 4; packet->payload = payload; packet->payload_length = length; goto common; } |
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if (tcode > 0x10) { |
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ext_tcode = tcode & ~0x10; |
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tcode = TCODE_LOCK_REQUEST; } else ext_tcode = 0; packet->header[0] = |
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HEADER_RETRY(RETRY_X) | HEADER_TLABEL(tlabel) | HEADER_TCODE(tcode) | |
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HEADER_DESTINATION(destination_id); |
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packet->header[1] = |
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HEADER_OFFSET_HIGH(offset >> 32) | HEADER_SOURCE(source_id); |
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packet->header[2] = offset; switch (tcode) { case TCODE_WRITE_QUADLET_REQUEST: packet->header[3] = *(u32 *)payload; packet->header_length = 16; packet->payload_length = 0; break; case TCODE_LOCK_REQUEST: case TCODE_WRITE_BLOCK_REQUEST: packet->header[3] = |
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HEADER_DATA_LENGTH(length) | HEADER_EXTENDED_TCODE(ext_tcode); |
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packet->header_length = 16; packet->payload = payload; packet->payload_length = length; break; case TCODE_READ_QUADLET_REQUEST: packet->header_length = 12; packet->payload_length = 0; break; case TCODE_READ_BLOCK_REQUEST: packet->header[3] = |
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HEADER_DATA_LENGTH(length) | HEADER_EXTENDED_TCODE(ext_tcode); |
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packet->header_length = 16; packet->payload_length = 0; break; |
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default: |
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WARN(1, "wrong tcode %d ", tcode); |
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} |
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common: |
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packet->speed = speed; packet->generation = generation; |
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packet->ack = 0; |
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packet->payload_mapped = false; |
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} |
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static int allocate_tlabel(struct fw_card *card) { int tlabel; tlabel = card->current_tlabel; while (card->tlabel_mask & (1ULL << tlabel)) { tlabel = (tlabel + 1) & 0x3f; if (tlabel == card->current_tlabel) return -EBUSY; } card->current_tlabel = (tlabel + 1) & 0x3f; card->tlabel_mask |= 1ULL << tlabel; return tlabel; } |
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/** |
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* fw_send_request() - submit a request packet for transmission * @card: interface to send the request at * @t: transaction instance to which the request belongs * @tcode: transaction code * @destination_id: destination node ID, consisting of bus_ID and phy_ID * @generation: bus generation in which request and response are valid * @speed: transmission speed * @offset: 48bit wide offset into destination's address space * @payload: data payload for the request subaction * @length: length of the payload, in bytes * @callback: function to be called when the transaction is completed * @callback_data: data to be passed to the transaction completion callback |
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* |
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* Submit a request packet into the asynchronous request transmission queue. * Can be called from atomic context. If you prefer a blocking API, use * fw_run_transaction() in a context that can sleep. |
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* |
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* In case of lock requests, specify one of the firewire-core specific %TCODE_ * constants instead of %TCODE_LOCK_REQUEST in @tcode. |
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* |
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* Make sure that the value in @destination_id is not older than the one in * @generation. Otherwise the request is in danger to be sent to a wrong node. |
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* |
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* In case of asynchronous stream packets i.e. %TCODE_STREAM_DATA, the caller |
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* needs to synthesize @destination_id with fw_stream_packet_destination_id(). |
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* It will contain tag, channel, and sy data instead of a node ID then. * * The payload buffer at @data is going to be DMA-mapped except in case of |
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* @length <= 8 or of local (loopback) requests. Hence make sure that the * buffer complies with the restrictions of the streaming DMA mapping API. |
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* @payload must not be freed before the @callback is called. * * In case of request types without payload, @data is NULL and @length is 0. * * After the transaction is completed successfully or unsuccessfully, the * @callback will be called. Among its parameters is the response code which * is either one of the rcodes per IEEE 1394 or, in case of internal errors, |
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* the firewire-core specific %RCODE_SEND_ERROR. The other firewire-core * specific rcodes (%RCODE_CANCELLED, %RCODE_BUSY, %RCODE_GENERATION, * %RCODE_NO_ACK) denote transaction timeout, busy responder, stale request * generation, or missing ACK respectively. |
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* * Note some timing corner cases: fw_send_request() may complete much earlier * than when the request packet actually hits the wire. On the other hand, * transaction completion and hence execution of @callback may happen even * before fw_send_request() returns. |
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*/ |
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void fw_send_request(struct fw_card *card, struct fw_transaction *t, int tcode, int destination_id, int generation, int speed, unsigned long long offset, void *payload, size_t length, fw_transaction_callback_t callback, void *callback_data) |
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{ unsigned long flags; |
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int tlabel; |
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|
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/* |
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* Allocate tlabel from the bitmap and put the transaction on * the list while holding the card spinlock. */ |
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spin_lock_irqsave(&card->lock, flags); |
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tlabel = allocate_tlabel(card); if (tlabel < 0) { |
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spin_unlock_irqrestore(&card->lock, flags); callback(card, RCODE_SEND_ERROR, NULL, 0, callback_data); return; } |
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t->node_id = destination_id; |
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t->tlabel = tlabel; |
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t->card = card; |
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t->is_split_transaction = false; |
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setup_timer(&t->split_timeout_timer, split_transaction_timeout_callback, (unsigned long)t); |
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t->callback = callback; t->callback_data = callback_data; |
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fw_fill_request(&t->packet, tcode, t->tlabel, destination_id, card->node_id, generation, speed, offset, payload, length); |
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t->packet.callback = transmit_complete_callback; |
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list_add_tail(&t->link, &card->transaction_list); spin_unlock_irqrestore(&card->lock, flags); |
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card->driver->send_request(card, &t->packet); } EXPORT_SYMBOL(fw_send_request); |
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struct transaction_callback_data { struct completion done; void *payload; int rcode; }; static void transaction_callback(struct fw_card *card, int rcode, void *payload, size_t length, void *data) { struct transaction_callback_data *d = data; if (rcode == RCODE_COMPLETE) memcpy(d->payload, payload, length); d->rcode = rcode; complete(&d->done); } /** |
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* fw_run_transaction() - send request and sleep until transaction is completed |
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* |
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* Returns the RCODE. See fw_send_request() for parameter documentation. * Unlike fw_send_request(), @data points to the payload of the request or/and |
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* to the payload of the response. DMA mapping restrictions apply to outbound * request payloads of >= 8 bytes but not to inbound response payloads. |
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*/ int fw_run_transaction(struct fw_card *card, int tcode, int destination_id, |
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int generation, int speed, unsigned long long offset, |
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void *payload, size_t length) |
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{ struct transaction_callback_data d; struct fw_transaction t; |
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init_timer_on_stack(&t.split_timeout_timer); |
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init_completion(&d.done); |
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d.payload = payload; |
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fw_send_request(card, &t, tcode, destination_id, generation, speed, |
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offset, payload, length, transaction_callback, &d); |
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wait_for_completion(&d.done); |
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destroy_timer_on_stack(&t.split_timeout_timer); |
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return d.rcode; } EXPORT_SYMBOL(fw_run_transaction); |
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static DEFINE_MUTEX(phy_config_mutex); static DECLARE_COMPLETION(phy_config_done); |
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static void transmit_phy_packet_callback(struct fw_packet *packet, struct fw_card *card, int status) |
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{ |
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complete(&phy_config_done); |
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} |
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static struct fw_packet phy_config_packet = { |
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.header_length = 12, .header[0] = TCODE_LINK_INTERNAL << 4, |
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.payload_length = 0, .speed = SCODE_100, .callback = transmit_phy_packet_callback, }; |
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void fw_send_phy_config(struct fw_card *card, int node_id, int generation, int gap_count) |
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{ |
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long timeout = DIV_ROUND_UP(HZ, 10); |
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u32 data = PHY_IDENTIFIER(PHY_PACKET_CONFIG); if (node_id != FW_PHY_CONFIG_NO_NODE_ID) data |= PHY_CONFIG_ROOT_ID(node_id); if (gap_count == FW_PHY_CONFIG_CURRENT_GAP_COUNT) { gap_count = card->driver->read_phy_reg(card, 1); if (gap_count < 0) return; gap_count &= 63; if (gap_count == 63) return; } data |= PHY_CONFIG_GAP_COUNT(gap_count); |
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|
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mutex_lock(&phy_config_mutex); |
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phy_config_packet.header[1] = data; phy_config_packet.header[2] = ~data; |
c0220d686 firewire: avoid m... |
451 452 453 454 455 |
phy_config_packet.generation = generation; INIT_COMPLETION(phy_config_done); card->driver->send_request(card, &phy_config_packet); wait_for_completion_timeout(&phy_config_done, timeout); |
ae1e53557 firewire: deadlin... |
456 |
|
c0220d686 firewire: avoid m... |
457 |
mutex_unlock(&phy_config_mutex); |
3038e353c firewire: Add cor... |
458 |
} |
53dca5117 firewire: remove ... |
459 460 |
static struct fw_address_handler *lookup_overlapping_address_handler( struct list_head *list, unsigned long long offset, size_t length) |
3038e353c firewire: Add cor... |
461 462 |
{ struct fw_address_handler *handler; |
35202f7d8 firewire: remove ... |
463 |
list_for_each_entry_rcu(handler, list, link) { |
3038e353c firewire: Add cor... |
464 465 466 467 468 469 470 |
if (handler->offset < offset + length && offset < handler->offset + handler->length) return handler; } return NULL; } |
db5d247ae firewire: fix use... |
471 472 473 474 475 476 |
static bool is_enclosing_handler(struct fw_address_handler *handler, unsigned long long offset, size_t length) { return handler->offset <= offset && offset + length <= handler->offset + handler->length; } |
53dca5117 firewire: remove ... |
477 478 |
static struct fw_address_handler *lookup_enclosing_address_handler( struct list_head *list, unsigned long long offset, size_t length) |
3038e353c firewire: Add cor... |
479 480 |
{ struct fw_address_handler *handler; |
35202f7d8 firewire: remove ... |
481 |
list_for_each_entry_rcu(handler, list, link) { |
db5d247ae firewire: fix use... |
482 |
if (is_enclosing_handler(handler, offset, length)) |
3038e353c firewire: Add cor... |
483 484 485 486 487 |
return handler; } return NULL; } |
4d50c4438 firewire: addendu... |
488 |
static DEFINE_SPINLOCK(address_handler_list_lock); |
3038e353c firewire: Add cor... |
489 |
static LIST_HEAD(address_handler_list); |
21ebcd122 firewire: mark so... |
490 |
const struct fw_address_region fw_high_memory_region = |
5af4e5eab firewire: comma a... |
491 |
{ .start = 0x000100000000ULL, .end = 0xffffe0000000ULL, }; |
db8be076c firewire: cleanups |
492 |
EXPORT_SYMBOL(fw_high_memory_region); |
f07d42ac7 firewire: core: a... |
493 |
static const struct fw_address_region low_memory_region = |
db8be076c firewire: cleanups |
494 |
{ .start = 0x000000000000ULL, .end = 0x000100000000ULL, }; |
f07d42ac7 firewire: core: a... |
495 496 |
#if 0 |
21ebcd122 firewire: mark so... |
497 |
const struct fw_address_region fw_private_region = |
5af4e5eab firewire: comma a... |
498 |
{ .start = 0xffffe0000000ULL, .end = 0xfffff0000000ULL, }; |
21ebcd122 firewire: mark so... |
499 |
const struct fw_address_region fw_csr_region = |
cca609771 firewire: replace... |
500 501 |
{ .start = CSR_REGISTER_BASE, .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM_END, }; |
21ebcd122 firewire: mark so... |
502 |
const struct fw_address_region fw_unit_space_region = |
5af4e5eab firewire: comma a... |
503 |
{ .start = 0xfffff0000900ULL, .end = 0x1000000000000ULL, }; |
db8be076c firewire: cleanups |
504 |
#endif /* 0 */ |
3038e353c firewire: Add cor... |
505 |
|
db5d247ae firewire: fix use... |
506 507 508 509 510 |
static bool is_in_fcp_region(u64 offset, size_t length) { return offset >= (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && offset + length <= (CSR_REGISTER_BASE | CSR_FCP_END); } |
3038e353c firewire: Add cor... |
511 |
/** |
656b7afd4 firewire: core: f... |
512 513 514 |
* fw_core_add_address_handler() - register for incoming requests * @handler: callback * @region: region in the IEEE 1212 node space address range |
3e0b5f0d7 firewire: cdev: a... |
515 516 517 518 519 520 |
* * region->start, ->end, and handler->length have to be quadlet-aligned. * * 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. |
1415d9189 firewire: optimiz... |
521 |
* |
4d50c4438 firewire: addendu... |
522 |
* To be called in process context. |
1415d9189 firewire: optimiz... |
523 |
* Return value: 0 on success, non-zero otherwise. |
db5d247ae firewire: fix use... |
524 |
* |
1415d9189 firewire: optimiz... |
525 526 |
* The start offset of the handler's address region is determined by * fw_core_add_address_handler() and is returned in handler->offset. |
db5d247ae firewire: fix use... |
527 528 |
* * Address allocations are exclusive, except for the FCP registers. |
3038e353c firewire: Add cor... |
529 |
*/ |
53dca5117 firewire: remove ... |
530 531 |
int fw_core_add_address_handler(struct fw_address_handler *handler, const struct fw_address_region *region) |
3038e353c firewire: Add cor... |
532 533 |
{ struct fw_address_handler *other; |
3038e353c firewire: Add cor... |
534 |
int ret = -EBUSY; |
3e0b5f0d7 firewire: cdev: a... |
535 |
if (region->start & 0xffff000000000003ULL || |
3e0b5f0d7 firewire: cdev: a... |
536 |
region->start >= region->end || |
0c9ae701a firewire: core: f... |
537 |
region->end > 0x0001000000000000ULL || |
3e0b5f0d7 firewire: cdev: a... |
538 539 540 |
handler->length & 3 || handler->length == 0) return -EINVAL; |
4d50c4438 firewire: addendu... |
541 |
spin_lock(&address_handler_list_lock); |
3038e353c firewire: Add cor... |
542 |
|
3e0b5f0d7 firewire: cdev: a... |
543 |
handler->offset = region->start; |
3038e353c firewire: Add cor... |
544 |
while (handler->offset + handler->length <= region->end) { |
db5d247ae firewire: fix use... |
545 546 547 548 549 550 |
if (is_in_fcp_region(handler->offset, handler->length)) other = NULL; else other = lookup_overlapping_address_handler (&address_handler_list, handler->offset, handler->length); |
3038e353c firewire: Add cor... |
551 |
if (other != NULL) { |
3e0b5f0d7 firewire: cdev: a... |
552 |
handler->offset += other->length; |
3038e353c firewire: Add cor... |
553 |
} else { |
35202f7d8 firewire: remove ... |
554 |
list_add_tail_rcu(&handler->link, &address_handler_list); |
3038e353c firewire: Add cor... |
555 556 557 558 |
ret = 0; break; } } |
4d50c4438 firewire: addendu... |
559 |
spin_unlock(&address_handler_list_lock); |
3038e353c firewire: Add cor... |
560 561 562 |
return ret; } |
3038e353c firewire: Add cor... |
563 564 565 |
EXPORT_SYMBOL(fw_core_add_address_handler); /** |
656b7afd4 firewire: core: f... |
566 |
* fw_core_remove_address_handler() - unregister an address handler |
90963f1cd firewire: core: f... |
567 |
* |
4d50c4438 firewire: addendu... |
568 569 |
* To be called in process context. * |
90963f1cd firewire: core: f... |
570 571 |
* When fw_core_remove_address_handler() returns, @handler->callback() is * guaranteed to not run on any CPU anymore. |
3038e353c firewire: Add cor... |
572 |
*/ |
3038e353c firewire: Add cor... |
573 574 |
void fw_core_remove_address_handler(struct fw_address_handler *handler) { |
4d50c4438 firewire: addendu... |
575 |
spin_lock(&address_handler_list_lock); |
35202f7d8 firewire: remove ... |
576 |
list_del_rcu(&handler->link); |
4d50c4438 firewire: addendu... |
577 |
spin_unlock(&address_handler_list_lock); |
35202f7d8 firewire: remove ... |
578 |
synchronize_rcu(); |
3038e353c firewire: Add cor... |
579 |
} |
3038e353c firewire: Add cor... |
580 581 582 583 |
EXPORT_SYMBOL(fw_core_remove_address_handler); struct fw_request { struct fw_packet response; |
36bfe49d0 firewire: Clean u... |
584 |
u32 request_header[4]; |
3038e353c firewire: Add cor... |
585 586 587 588 |
int ack; u32 length; u32 data[0]; }; |
53dca5117 firewire: remove ... |
589 590 |
static void free_response_callback(struct fw_packet *packet, struct fw_card *card, int status) |
3038e353c firewire: Add cor... |
591 592 593 594 595 596 |
{ struct fw_request *request; request = container_of(packet, struct fw_request, response); kfree(request); } |
a10c0ce76 firewire: check c... |
597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 |
int fw_get_response_length(struct fw_request *r) { int tcode, ext_tcode, data_length; tcode = HEADER_GET_TCODE(r->request_header[0]); switch (tcode) { case TCODE_WRITE_QUADLET_REQUEST: case TCODE_WRITE_BLOCK_REQUEST: return 0; case TCODE_READ_QUADLET_REQUEST: return 4; case TCODE_READ_BLOCK_REQUEST: data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); return data_length; case TCODE_LOCK_REQUEST: ext_tcode = HEADER_GET_EXTENDED_TCODE(r->request_header[3]); data_length = HEADER_GET_DATA_LENGTH(r->request_header[3]); switch (ext_tcode) { case EXTCODE_FETCH_ADD: case EXTCODE_LITTLE_ADD: return data_length; default: return data_length / 2; } default: |
5878730be firewire: core: U... |
627 628 |
WARN(1, "wrong tcode %d ", tcode); |
a10c0ce76 firewire: check c... |
629 630 631 |
return 0; } } |
53dca5117 firewire: remove ... |
632 633 |
void fw_fill_response(struct fw_packet *response, u32 *request_header, int rcode, void *payload, size_t length) |
3038e353c firewire: Add cor... |
634 635 |
{ int tcode, tlabel, extended_tcode, source, destination; |
a77754a75 firewire: Upperca... |
636 637 638 639 640 |
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]); |
3038e353c firewire: Add cor... |
641 642 |
response->header[0] = |
a77754a75 firewire: Upperca... |
643 644 645 |
HEADER_RETRY(RETRY_1) | HEADER_TLABEL(tlabel) | HEADER_DESTINATION(destination); |
36bfe49d0 firewire: Clean u... |
646 |
response->header[1] = |
a77754a75 firewire: Upperca... |
647 648 |
HEADER_SOURCE(source) | HEADER_RCODE(rcode); |
3038e353c firewire: Add cor... |
649 650 651 652 653 |
response->header[2] = 0; switch (tcode) { case TCODE_WRITE_QUADLET_REQUEST: case TCODE_WRITE_BLOCK_REQUEST: |
a77754a75 firewire: Upperca... |
654 |
response->header[0] |= HEADER_TCODE(TCODE_WRITE_RESPONSE); |
3038e353c firewire: Add cor... |
655 656 657 658 659 660 |
response->header_length = 12; response->payload_length = 0; break; case TCODE_READ_QUADLET_REQUEST: response->header[0] |= |
a77754a75 firewire: Upperca... |
661 |
HEADER_TCODE(TCODE_READ_QUADLET_RESPONSE); |
93c4cceb9 firewire: Handle ... |
662 663 664 665 |
if (payload != NULL) response->header[3] = *(u32 *)payload; else response->header[3] = 0; |
3038e353c firewire: Add cor... |
666 667 668 669 670 671 |
response->header_length = 16; response->payload_length = 0; break; case TCODE_READ_BLOCK_REQUEST: case TCODE_LOCK_REQUEST: |
a77754a75 firewire: Upperca... |
672 |
response->header[0] |= HEADER_TCODE(tcode + 2); |
3038e353c firewire: Add cor... |
673 |
response->header[3] = |
a77754a75 firewire: Upperca... |
674 675 |
HEADER_DATA_LENGTH(length) | HEADER_EXTENDED_TCODE(extended_tcode); |
3038e353c firewire: Add cor... |
676 |
response->header_length = 16; |
36bfe49d0 firewire: Clean u... |
677 678 |
response->payload = payload; response->payload_length = length; |
3038e353c firewire: Add cor... |
679 680 681 |
break; default: |
5878730be firewire: core: U... |
682 683 |
WARN(1, "wrong tcode %d ", tcode); |
3038e353c firewire: Add cor... |
684 |
} |
1d1dc5e83 firewire: fw-ohci... |
685 |
|
19593ffdb firewire: ohci: 0... |
686 |
response->payload_mapped = false; |
3038e353c firewire: Add cor... |
687 |
} |
93c4cceb9 firewire: Handle ... |
688 |
EXPORT_SYMBOL(fw_fill_response); |
3038e353c firewire: Add cor... |
689 |
|
8e4b50f94 firewire: core: a... |
690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 |
static u32 compute_split_timeout_timestamp(struct fw_card *card, u32 request_timestamp) { unsigned int cycles; u32 timestamp; cycles = card->split_timeout_cycles; cycles += request_timestamp & 0x1fff; timestamp = request_timestamp & ~0x1fff; timestamp += (cycles / 8000) << 13; timestamp |= cycles % 8000; return timestamp; } static struct fw_request *allocate_request(struct fw_card *card, struct fw_packet *p) |
3038e353c firewire: Add cor... |
708 709 710 |
{ struct fw_request *request; u32 *data, length; |
8e4b50f94 firewire: core: a... |
711 |
int request_tcode; |
3038e353c firewire: Add cor... |
712 |
|
a77754a75 firewire: Upperca... |
713 |
request_tcode = HEADER_GET_TCODE(p->header[0]); |
3038e353c firewire: Add cor... |
714 715 |
switch (request_tcode) { case TCODE_WRITE_QUADLET_REQUEST: |
2639a6fb2 firewire: Use str... |
716 |
data = &p->header[3]; |
3038e353c firewire: Add cor... |
717 718 719 720 721 |
length = 4; break; case TCODE_WRITE_BLOCK_REQUEST: case TCODE_LOCK_REQUEST: |
2639a6fb2 firewire: Use str... |
722 |
data = p->payload; |
a77754a75 firewire: Upperca... |
723 |
length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353c firewire: Add cor... |
724 725 726 727 728 729 730 731 732 |
break; case TCODE_READ_QUADLET_REQUEST: data = NULL; length = 4; break; case TCODE_READ_BLOCK_REQUEST: data = NULL; |
a77754a75 firewire: Upperca... |
733 |
length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353c firewire: Add cor... |
734 735 736 |
break; default: |
26b4950de firewire: core: p... |
737 738 |
fw_notice(card, "ERROR - corrupt request received - %08x %08x %08x ", |
0bf607c5b firewire: don't p... |
739 |
p->header[0], p->header[1], p->header[2]); |
3038e353c firewire: Add cor... |
740 741 |
return NULL; } |
2d826cc5c firewire: Always ... |
742 |
request = kmalloc(sizeof(*request) + length, GFP_ATOMIC); |
3038e353c firewire: Add cor... |
743 744 |
if (request == NULL) return NULL; |
2639a6fb2 firewire: Use str... |
745 |
request->response.speed = p->speed; |
8e4b50f94 firewire: core: a... |
746 747 |
request->response.timestamp = compute_split_timeout_timestamp(card, p->timestamp); |
2639a6fb2 firewire: Use str... |
748 |
request->response.generation = p->generation; |
730c32f58 firewire: Impleme... |
749 |
request->response.ack = 0; |
3038e353c firewire: Add cor... |
750 |
request->response.callback = free_response_callback; |
2639a6fb2 firewire: Use str... |
751 |
request->ack = p->ack; |
93c4cceb9 firewire: Handle ... |
752 |
request->length = length; |
3038e353c firewire: Add cor... |
753 |
if (data) |
6e2e8424d firewire: Use cor... |
754 |
memcpy(request->data, data, length); |
3038e353c firewire: Add cor... |
755 |
|
2d826cc5c firewire: Always ... |
756 |
memcpy(request->request_header, p->header, sizeof(p->header)); |
3038e353c firewire: Add cor... |
757 758 759 |
return request; } |
53dca5117 firewire: remove ... |
760 761 |
void fw_send_response(struct fw_card *card, struct fw_request *request, int rcode) |
3038e353c firewire: Add cor... |
762 |
{ |
db5d247ae firewire: fix use... |
763 764 |
if (WARN_ONCE(!request, "invalid for FCP address handlers")) return; |
a7ea67823 firewire: don't r... |
765 766 767 |
/* unified transaction or broadcast transaction: don't respond */ if (request->ack != ACK_PENDING || HEADER_DESTINATION_IS_BROADCAST(request->request_header[0])) { |
9c9bdf4d5 firewire: fix mem... |
768 |
kfree(request); |
3038e353c firewire: Add cor... |
769 |
return; |
9c9bdf4d5 firewire: fix mem... |
770 |
} |
3038e353c firewire: Add cor... |
771 |
|
36bfe49d0 firewire: Clean u... |
772 773 |
if (rcode == RCODE_COMPLETE) fw_fill_response(&request->response, request->request_header, |
a10c0ce76 firewire: check c... |
774 775 |
rcode, request->data, fw_get_response_length(request)); |
36bfe49d0 firewire: Clean u... |
776 777 778 |
else fw_fill_response(&request->response, request->request_header, rcode, NULL, 0); |
3038e353c firewire: Add cor... |
779 780 781 |
card->driver->send_response(card, &request->response); } |
3038e353c firewire: Add cor... |
782 |
EXPORT_SYMBOL(fw_send_response); |
253d92371 firewire: Add fun... |
783 784 785 786 787 788 789 790 |
/** * fw_get_request_speed() - returns speed at which the @request was received */ int fw_get_request_speed(struct fw_request *request) { return request->response.speed; } EXPORT_SYMBOL(fw_get_request_speed); |
db5d247ae firewire: fix use... |
791 792 793 794 |
static void handle_exclusive_region_request(struct fw_card *card, struct fw_packet *p, struct fw_request *request, unsigned long long offset) |
3038e353c firewire: Add cor... |
795 796 |
{ struct fw_address_handler *handler; |
2639a6fb2 firewire: Use str... |
797 |
int tcode, destination, source; |
3038e353c firewire: Add cor... |
798 |
|
a77754a75 firewire: Upperca... |
799 |
destination = HEADER_GET_DESTINATION(p->header[0]); |
478b233ed firewire: Fix ext... |
800 |
source = HEADER_GET_SOURCE(p->header[1]); |
c82f91f26 firewire: expose ... |
801 802 803 |
tcode = HEADER_GET_TCODE(p->header[0]); if (tcode == TCODE_LOCK_REQUEST) tcode = 0x10 + HEADER_GET_EXTENDED_TCODE(p->header[3]); |
3038e353c firewire: Add cor... |
804 |
|
35202f7d8 firewire: remove ... |
805 |
rcu_read_lock(); |
3038e353c firewire: Add cor... |
806 807 |
handler = lookup_enclosing_address_handler(&address_handler_list, offset, request->length); |
90963f1cd firewire: core: f... |
808 |
if (handler) |
3038e353c firewire: Add cor... |
809 810 |
handler->address_callback(card, request, tcode, destination, source, |
33e553fe2 firewire: remove ... |
811 |
p->generation, offset, |
3038e353c firewire: Add cor... |
812 813 |
request->data, request->length, handler->callback_data); |
35202f7d8 firewire: remove ... |
814 |
rcu_read_unlock(); |
90963f1cd firewire: core: f... |
815 816 817 |
if (!handler) fw_send_response(card, request, RCODE_ADDRESS_ERROR); |
3038e353c firewire: Add cor... |
818 |
} |
db5d247ae firewire: fix use... |
819 820 821 822 823 824 825 |
static void handle_fcp_region_request(struct fw_card *card, struct fw_packet *p, struct fw_request *request, unsigned long long offset) { struct fw_address_handler *handler; |
db5d247ae firewire: fix use... |
826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 |
int tcode, destination, source; if ((offset != (CSR_REGISTER_BASE | CSR_FCP_COMMAND) && offset != (CSR_REGISTER_BASE | CSR_FCP_RESPONSE)) || request->length > 0x200) { fw_send_response(card, request, RCODE_ADDRESS_ERROR); return; } tcode = HEADER_GET_TCODE(p->header[0]); destination = HEADER_GET_DESTINATION(p->header[0]); source = HEADER_GET_SOURCE(p->header[1]); if (tcode != TCODE_WRITE_QUADLET_REQUEST && tcode != TCODE_WRITE_BLOCK_REQUEST) { fw_send_response(card, request, RCODE_TYPE_ERROR); return; } |
35202f7d8 firewire: remove ... |
846 847 |
rcu_read_lock(); list_for_each_entry_rcu(handler, &address_handler_list, link) { |
db5d247ae firewire: fix use... |
848 849 850 |
if (is_enclosing_handler(handler, offset, request->length)) handler->address_callback(card, NULL, tcode, destination, source, |
33e553fe2 firewire: remove ... |
851 852 |
p->generation, offset, request->data, |
db5d247ae firewire: fix use... |
853 854 855 |
request->length, handler->callback_data); } |
35202f7d8 firewire: remove ... |
856 |
rcu_read_unlock(); |
db5d247ae firewire: fix use... |
857 858 859 860 861 862 863 864 865 866 867 |
fw_send_response(card, request, RCODE_COMPLETE); } void fw_core_handle_request(struct fw_card *card, struct fw_packet *p) { struct fw_request *request; unsigned long long offset; if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE) return; |
bf54e1462 firewire: cdev: a... |
868 869 870 871 |
if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) { fw_cdev_handle_phy_packet(card, p); return; } |
8e4b50f94 firewire: core: a... |
872 |
request = allocate_request(card, p); |
db5d247ae firewire: fix use... |
873 874 875 876 877 878 879 880 881 882 883 884 885 886 |
if (request == NULL) { /* FIXME: send statically allocated busy packet. */ return; } offset = ((u64)HEADER_GET_OFFSET_HIGH(p->header[1]) << 32) | p->header[2]; if (!is_in_fcp_region(offset, request->length)) handle_exclusive_region_request(card, p, request, offset); else handle_fcp_region_request(card, p, request, offset); } |
3038e353c firewire: Add cor... |
887 |
EXPORT_SYMBOL(fw_core_handle_request); |
53dca5117 firewire: remove ... |
888 |
void fw_core_handle_response(struct fw_card *card, struct fw_packet *p) |
3038e353c firewire: Add cor... |
889 890 891 892 893 |
{ struct fw_transaction *t; unsigned long flags; u32 *data; size_t data_length; |
ae86e81e4 firewire: core: r... |
894 |
int tcode, tlabel, source, rcode; |
3038e353c firewire: Add cor... |
895 |
|
ae86e81e4 firewire: core: r... |
896 897 898 899 |
tcode = HEADER_GET_TCODE(p->header[0]); tlabel = HEADER_GET_TLABEL(p->header[0]); source = HEADER_GET_SOURCE(p->header[1]); rcode = HEADER_GET_RCODE(p->header[1]); |
3038e353c firewire: Add cor... |
900 901 902 903 |
spin_lock_irqsave(&card->lock, flags); list_for_each_entry(t, &card->transaction_list, link) { if (t->node_id == source && t->tlabel == tlabel) { |
410cf2bd3 firewire: use spl... |
904 |
if (!try_cancel_split_timeout(t)) { |
2222bcb76 firewire: core: d... |
905 906 907 |
spin_unlock_irqrestore(&card->lock, flags); goto timed_out; } |
5c40cbfef firewire: core: u... |
908 |
list_del_init(&t->link); |
753a8970f firewire: core: F... |
909 |
card->tlabel_mask &= ~(1ULL << t->tlabel); |
3038e353c firewire: Add cor... |
910 911 912 913 914 915 |
break; } } spin_unlock_irqrestore(&card->lock, flags); if (&t->link == &card->transaction_list) { |
2222bcb76 firewire: core: d... |
916 |
timed_out: |
26b4950de firewire: core: p... |
917 918 |
fw_notice(card, "unsolicited response (source %x, tlabel %x) ", |
32b46093a firewire: Rework ... |
919 |
source, tlabel); |
3038e353c firewire: Add cor... |
920 921 |
return; } |
c781c06d1 firewire: Clean u... |
922 923 924 925 |
/* * FIXME: sanity check packet, is length correct, does tcodes * and addresses match. */ |
3038e353c firewire: Add cor... |
926 927 928 |
switch (tcode) { case TCODE_READ_QUADLET_RESPONSE: |
2639a6fb2 firewire: Use str... |
929 |
data = (u32 *) &p->header[3]; |
3038e353c firewire: Add cor... |
930 931 932 933 934 935 936 937 938 939 |
data_length = 4; break; case TCODE_WRITE_RESPONSE: data = NULL; data_length = 0; break; case TCODE_READ_BLOCK_RESPONSE: case TCODE_LOCK_RESPONSE: |
93c4cceb9 firewire: Handle ... |
940 |
data = p->payload; |
a77754a75 firewire: Upperca... |
941 |
data_length = HEADER_GET_DATA_LENGTH(p->header[3]); |
3038e353c firewire: Add cor... |
942 943 944 945 946 947 948 949 |
break; default: /* Should never happen, this is just to shut up gcc. */ data = NULL; data_length = 0; break; } |
10a4c7355 firewire: fix pan... |
950 951 952 953 954 |
/* * The response handler may be executed while the request handler * is still pending. Cancel the request handler. */ card->driver->cancel_packet(card, &t->packet); |
3038e353c firewire: Add cor... |
955 956 |
t->callback(card, rcode, data, data_length, t->callback_data); } |
3038e353c firewire: Add cor... |
957 |
EXPORT_SYMBOL(fw_core_handle_response); |
7bdbff676 firewire: move rc... |
958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 |
/** * fw_rcode_string - convert a firewire result code to an error description * @rcode: the result code */ const char *fw_rcode_string(int rcode) { static const char *const names[] = { [RCODE_COMPLETE] = "no error", [RCODE_CONFLICT_ERROR] = "conflict error", [RCODE_DATA_ERROR] = "data error", [RCODE_TYPE_ERROR] = "type error", [RCODE_ADDRESS_ERROR] = "address error", [RCODE_SEND_ERROR] = "send error", [RCODE_CANCELLED] = "timeout", [RCODE_BUSY] = "busy", [RCODE_GENERATION] = "bus reset", [RCODE_NO_ACK] = "no ack", }; if ((unsigned int)rcode < ARRAY_SIZE(names) && names[rcode]) return names[rcode]; else return "unknown"; } EXPORT_SYMBOL(fw_rcode_string); |
ae57988f6 firewire: fw-core... |
983 |
static const struct fw_address_region topology_map_region = |
cca609771 firewire: replace... |
984 985 |
{ .start = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP, .end = CSR_REGISTER_BASE | CSR_TOPOLOGY_MAP_END, }; |
473d28c73 firewire: Impleme... |
986 |
|
53dca5117 firewire: remove ... |
987 988 |
static void handle_topology_map(struct fw_card *card, struct fw_request *request, int tcode, int destination, int source, int generation, |
33e553fe2 firewire: remove ... |
989 990 |
unsigned long long offset, void *payload, size_t length, void *callback_data) |
473d28c73 firewire: Impleme... |
991 |
{ |
cb7c96da3 firewire: core: o... |
992 |
int start; |
473d28c73 firewire: Impleme... |
993 994 995 996 997 998 999 1000 1001 1002 1003 1004 |
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; |
cb7c96da3 firewire: core: o... |
1005 |
memcpy(payload, &card->topology_map[start], length); |
473d28c73 firewire: Impleme... |
1006 1007 1008 1009 1010 |
fw_send_response(card, request, RCODE_COMPLETE); } static struct fw_address_handler topology_map = { |
85cb9b686 firewire: core: f... |
1011 |
.length = 0x400, |
473d28c73 firewire: Impleme... |
1012 1013 |
.address_callback = handle_topology_map, }; |
ae57988f6 firewire: fw-core... |
1014 |
static const struct fw_address_region registers_region = |
cca609771 firewire: replace... |
1015 1016 |
{ .start = CSR_REGISTER_BASE, .end = CSR_REGISTER_BASE | CSR_CONFIG_ROM, }; |
d60d7f1d5 firewire: Impleme... |
1017 |
|
8e4b50f94 firewire: core: a... |
1018 1019 1020 1021 1022 |
static void update_split_timeout(struct fw_card *card) { unsigned int cycles; cycles = card->split_timeout_hi * 8000 + (card->split_timeout_lo >> 19); |
4ec4a67aa firewire: use cla... |
1023 1024 |
/* minimum per IEEE 1394, maximum which doesn't overflow OHCI */ cycles = clamp(cycles, 800u, 3u * 8000u); |
8e4b50f94 firewire: core: a... |
1025 1026 1027 1028 |
card->split_timeout_cycles = cycles; card->split_timeout_jiffies = DIV_ROUND_UP(cycles * HZ, 8000); } |
53dca5117 firewire: remove ... |
1029 1030 |
static void handle_registers(struct fw_card *card, struct fw_request *request, int tcode, int destination, int source, int generation, |
33e553fe2 firewire: remove ... |
1031 1032 |
unsigned long long offset, void *payload, size_t length, void *callback_data) |
d60d7f1d5 firewire: Impleme... |
1033 |
{ |
15f0d833f firewire: use bit... |
1034 |
int reg = offset & ~CSR_REGISTER_BASE; |
d60d7f1d5 firewire: Impleme... |
1035 |
__be32 *data = payload; |
e534fe16b firewire: impleme... |
1036 |
int rcode = RCODE_COMPLETE; |
8e4b50f94 firewire: core: a... |
1037 |
unsigned long flags; |
d60d7f1d5 firewire: Impleme... |
1038 1039 |
switch (reg) { |
b384cf188 firewire: core: c... |
1040 1041 1042 1043 1044 1045 |
case CSR_PRIORITY_BUDGET: if (!card->priority_budget_implemented) { rcode = RCODE_ADDRESS_ERROR; break; } /* else fall through */ |
3e07ec0ee firewire: core: a... |
1046 |
|
506f1a319 firewire: add CSR... |
1047 |
case CSR_NODE_IDS: |
65b2742ac firewire: 'add CS... |
1048 1049 1050 1051 |
/* * per IEEE 1394-2008 8.3.22.3, not IEEE 1394.1-2004 3.2.8 * and 9.6, but interoperable with IEEE 1394.1-2004 bridges */ |
b384cf188 firewire: core: c... |
1052 1053 1054 1055 1056 1057 1058 |
/* fall through */ case CSR_STATE_CLEAR: case CSR_STATE_SET: case CSR_CYCLE_TIME: case CSR_BUS_TIME: case CSR_BUSY_TIMEOUT: |
506f1a319 firewire: add CSR... |
1059 |
if (tcode == TCODE_READ_QUADLET_REQUEST) |
0fcff4e39 firewire: rename ... |
1060 |
*data = cpu_to_be32(card->driver->read_csr(card, reg)); |
506f1a319 firewire: add CSR... |
1061 |
else if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
0fcff4e39 firewire: rename ... |
1062 |
card->driver->write_csr(card, reg, be32_to_cpu(*data)); |
506f1a319 firewire: add CSR... |
1063 1064 1065 |
else rcode = RCODE_TYPE_ERROR; break; |
446eba0d6 firewire: core: a... |
1066 |
case CSR_RESET_START: |
7e0e314f1 firewire: core: a... |
1067 |
if (tcode == TCODE_WRITE_QUADLET_REQUEST) |
0fcff4e39 firewire: rename ... |
1068 1069 |
card->driver->write_csr(card, CSR_STATE_CLEAR, CSR_STATE_BIT_ABDICATE); |
7e0e314f1 firewire: core: a... |
1070 |
else |
446eba0d6 firewire: core: a... |
1071 1072 |
rcode = RCODE_TYPE_ERROR; break; |
8e4b50f94 firewire: core: a... |
1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 |
case CSR_SPLIT_TIMEOUT_HI: if (tcode == TCODE_READ_QUADLET_REQUEST) { *data = cpu_to_be32(card->split_timeout_hi); } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { spin_lock_irqsave(&card->lock, flags); card->split_timeout_hi = be32_to_cpu(*data) & 7; update_split_timeout(card); spin_unlock_irqrestore(&card->lock, flags); } else { rcode = RCODE_TYPE_ERROR; } break; case CSR_SPLIT_TIMEOUT_LO: if (tcode == TCODE_READ_QUADLET_REQUEST) { *data = cpu_to_be32(card->split_timeout_lo); } else if (tcode == TCODE_WRITE_QUADLET_REQUEST) { spin_lock_irqsave(&card->lock, flags); card->split_timeout_lo = be32_to_cpu(*data) & 0xfff80000; update_split_timeout(card); spin_unlock_irqrestore(&card->lock, flags); } else { rcode = RCODE_TYPE_ERROR; } break; |
3d1f46eb6 firewire: core: a... |
1099 1100 1101 1102 1103 1104 1105 1106 |
case CSR_MAINT_UTILITY: if (tcode == TCODE_READ_QUADLET_REQUEST) *data = card->maint_utility_register; else if (tcode == TCODE_WRITE_QUADLET_REQUEST) card->maint_utility_register = *data; else rcode = RCODE_TYPE_ERROR; break; |
e534fe16b firewire: impleme... |
1107 1108 1109 1110 1111 1112 1113 1114 1115 |
case CSR_BROADCAST_CHANNEL: if (tcode == TCODE_READ_QUADLET_REQUEST) *data = cpu_to_be32(card->broadcast_channel); else if (tcode == TCODE_WRITE_QUADLET_REQUEST) card->broadcast_channel = (be32_to_cpu(*data) & BROADCAST_CHANNEL_VALID) | BROADCAST_CHANNEL_INITIAL; else rcode = RCODE_TYPE_ERROR; |
d60d7f1d5 firewire: Impleme... |
1116 1117 1118 1119 1120 1121 |
break; case CSR_BUS_MANAGER_ID: case CSR_BANDWIDTH_AVAILABLE: case CSR_CHANNELS_AVAILABLE_HI: case CSR_CHANNELS_AVAILABLE_LO: |
c781c06d1 firewire: Clean u... |
1122 1123 |
/* * FIXME: these are handled by the OHCI hardware and |
d60d7f1d5 firewire: Impleme... |
1124 1125 1126 |
* 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 |
c781c06d1 firewire: Clean u... |
1127 1128 |
* transactions. */ |
d60d7f1d5 firewire: Impleme... |
1129 1130 |
BUG(); break; |
d60d7f1d5 firewire: Impleme... |
1131 |
default: |
e534fe16b firewire: impleme... |
1132 |
rcode = RCODE_ADDRESS_ERROR; |
d60d7f1d5 firewire: Impleme... |
1133 1134 |
break; } |
e534fe16b firewire: impleme... |
1135 1136 |
fw_send_response(card, request, rcode); |
d60d7f1d5 firewire: Impleme... |
1137 1138 1139 1140 1141 1142 |
} static struct fw_address_handler registers = { .length = 0x400, .address_callback = handle_registers, }; |
f07d42ac7 firewire: core: a... |
1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 |
static void handle_low_memory(struct fw_card *card, struct fw_request *request, int tcode, int destination, int source, int generation, unsigned long long offset, void *payload, size_t length, void *callback_data) { /* * This catches requests not handled by the physical DMA unit, * i.e., wrong transaction types or unauthorized source nodes. */ fw_send_response(card, request, RCODE_TYPE_ERROR); } static struct fw_address_handler low_memory = { .length = 0x000100000000ULL, .address_callback = handle_low_memory, }; |
3038e353c firewire: Add cor... |
1159 1160 1161 |
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>"); MODULE_DESCRIPTION("Core IEEE1394 transaction logic"); MODULE_LICENSE("GPL"); |
937f68796 firewire: Let an ... |
1162 |
static const u32 vendor_textual_descriptor[] = { |
3038e353c firewire: Add cor... |
1163 |
/* textual descriptor leaf () */ |
937f68796 firewire: Let an ... |
1164 |
0x00060000, |
3038e353c firewire: Add cor... |
1165 1166 1167 1168 1169 |
0x00000000, 0x00000000, 0x4c696e75, /* L i n u */ 0x78204669, /* x F i */ 0x72657769, /* r e w i */ |
937f68796 firewire: Let an ... |
1170 |
0x72650000, /* r e */ |
3038e353c firewire: Add cor... |
1171 |
}; |
937f68796 firewire: Let an ... |
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 |
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, |
3038e353c firewire: Add cor... |
1183 |
.key = 0x81000000, |
937f68796 firewire: Let an ... |
1184 1185 1186 1187 1188 1189 1190 1191 |
.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, |
3038e353c firewire: Add cor... |
1192 |
}; |
3038e353c firewire: Add cor... |
1193 1194 |
static int __init fw_core_init(void) { |
2dbd7d7e2 firewire: standar... |
1195 |
int ret; |
3038e353c firewire: Add cor... |
1196 |
|
105e53f86 firewire: sbp2: p... |
1197 1198 1199 |
fw_workqueue = alloc_workqueue("firewire", WQ_NON_REENTRANT | WQ_MEM_RECLAIM, 0); if (!fw_workqueue) |
6ea9e7bbf firewire: core: u... |
1200 |
return -ENOMEM; |
2dbd7d7e2 firewire: standar... |
1201 |
ret = bus_register(&fw_bus_type); |
6ea9e7bbf firewire: core: u... |
1202 |
if (ret < 0) { |
105e53f86 firewire: sbp2: p... |
1203 |
destroy_workqueue(fw_workqueue); |
2dbd7d7e2 firewire: standar... |
1204 |
return ret; |
6ea9e7bbf firewire: core: u... |
1205 |
} |
3038e353c firewire: Add cor... |
1206 |
|
a3aca3dab firewire: Switch ... |
1207 1208 1209 |
fw_cdev_major = register_chrdev(0, "firewire", &fw_device_ops); if (fw_cdev_major < 0) { bus_unregister(&fw_bus_type); |
105e53f86 firewire: sbp2: p... |
1210 |
destroy_workqueue(fw_workqueue); |
a3aca3dab firewire: Switch ... |
1211 1212 |
return fw_cdev_major; } |
c490a6dec firewire: core: r... |
1213 1214 |
fw_core_add_address_handler(&topology_map, &topology_map_region); fw_core_add_address_handler(®isters, ®isters_region); |
f07d42ac7 firewire: core: a... |
1215 |
fw_core_add_address_handler(&low_memory, &low_memory_region); |
c490a6dec firewire: core: r... |
1216 1217 |
fw_core_add_descriptor(&vendor_id_descriptor); fw_core_add_descriptor(&model_id_descriptor); |
3038e353c firewire: Add cor... |
1218 1219 1220 1221 1222 1223 |
return 0; } static void __exit fw_core_cleanup(void) { |
a3aca3dab firewire: Switch ... |
1224 |
unregister_chrdev(fw_cdev_major, "firewire"); |
3038e353c firewire: Add cor... |
1225 |
bus_unregister(&fw_bus_type); |
105e53f86 firewire: sbp2: p... |
1226 |
destroy_workqueue(fw_workqueue); |
d6053e08f firewire: fix sma... |
1227 |
idr_destroy(&fw_device_idr); |
3038e353c firewire: Add cor... |
1228 1229 1230 1231 |
} module_init(fw_core_init); module_exit(fw_core_cleanup); |