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-rw-r--r--drivers/firewire/core-card.c1
-rw-r--r--drivers/firewire/core-cdev.c73
-rw-r--r--drivers/firewire/core-transaction.c5
-rw-r--r--drivers/firewire/core.h2
-rw-r--r--drivers/firewire/ohci.c3
-rw-r--r--include/linux/firewire-cdev.h39
-rw-r--r--include/linux/firewire.h3
7 files changed, 111 insertions, 15 deletions
diff --git a/drivers/firewire/core-card.c b/drivers/firewire/core-card.c
index 0c312c4bb4bd..6d1cfae6aad4 100644
--- a/drivers/firewire/core-card.c
+++ b/drivers/firewire/core-card.c
@@ -500,6 +500,7 @@ void fw_card_initialize(struct fw_card *card,
kref_init(&card->kref);
init_completion(&card->done);
INIT_LIST_HEAD(&card->transaction_list);
+ INIT_LIST_HEAD(&card->phy_receiver_list);
spin_lock_init(&card->lock);
card->local_node = NULL;
diff --git a/drivers/firewire/core-cdev.c b/drivers/firewire/core-cdev.c
index f95719926487..0425dd5dfcd3 100644
--- a/drivers/firewire/core-cdev.c
+++ b/drivers/firewire/core-cdev.c
@@ -69,6 +69,9 @@ struct client {
struct fw_iso_buffer buffer;
unsigned long vm_start;
+ struct list_head phy_receiver_link;
+ u64 phy_receiver_closure;
+
struct list_head link;
struct kref kref;
};
@@ -201,6 +204,11 @@ struct outbound_phy_packet_event {
struct fw_cdev_event_phy_packet phy_packet;
};
+struct inbound_phy_packet_event {
+ struct event event;
+ struct fw_cdev_event_phy_packet phy_packet;
+};
+
static inline void __user *u64_to_uptr(__u64 value)
{
return (void __user *)(unsigned long)value;
@@ -236,6 +244,7 @@ static int fw_device_op_open(struct inode *inode, struct file *file)
idr_init(&client->resource_idr);
INIT_LIST_HEAD(&client->event_list);
init_waitqueue_head(&client->wait);
+ INIT_LIST_HEAD(&client->phy_receiver_link);
kref_init(&client->kref);
file->private_data = client;
@@ -357,7 +366,7 @@ static void queue_bus_reset_event(struct client *client)
e = kzalloc(sizeof(*e), GFP_KERNEL);
if (e == NULL) {
- fw_notify("Out of memory when allocating bus reset event\n");
+ fw_notify("Out of memory when allocating event\n");
return;
}
@@ -404,6 +413,7 @@ union ioctl_arg {
struct fw_cdev_send_stream_packet send_stream_packet;
struct fw_cdev_get_cycle_timer2 get_cycle_timer2;
struct fw_cdev_send_phy_packet send_phy_packet;
+ struct fw_cdev_receive_phy_packets receive_phy_packets;
};
static int ioctl_get_info(struct client *client, union ioctl_arg *arg)
@@ -671,9 +681,10 @@ static void handle_request(struct fw_card *card, struct fw_request *request,
r = kmalloc(sizeof(*r), GFP_ATOMIC);
e = kmalloc(sizeof(*e), GFP_ATOMIC);
- if (r == NULL || e == NULL)
+ if (r == NULL || e == NULL) {
+ fw_notify("Out of memory when allocating event\n");
goto failed;
-
+ }
r->card = card;
r->request = request;
r->data = payload;
@@ -902,9 +913,10 @@ static void iso_callback(struct fw_iso_context *context, u32 cycle,
struct iso_interrupt_event *e;
e = kmalloc(sizeof(*e) + header_length, GFP_ATOMIC);
- if (e == NULL)
+ if (e == NULL) {
+ fw_notify("Out of memory when allocating event\n");
return;
-
+ }
e->interrupt.type = FW_CDEV_EVENT_ISO_INTERRUPT;
e->interrupt.closure = client->iso_closure;
e->interrupt.cycle = cycle;
@@ -1447,6 +1459,52 @@ static int ioctl_send_phy_packet(struct client *client, union ioctl_arg *arg)
return 0;
}
+static int ioctl_receive_phy_packets(struct client *client, union ioctl_arg *arg)
+{
+ struct fw_cdev_receive_phy_packets *a = &arg->receive_phy_packets;
+ struct fw_card *card = client->device->card;
+
+ /* Access policy: Allow this ioctl only on local nodes' device files. */
+ if (!client->device->is_local)
+ return -ENOSYS;
+
+ spin_lock_irq(&card->lock);
+
+ list_move_tail(&client->phy_receiver_link, &card->phy_receiver_list);
+ client->phy_receiver_closure = a->closure;
+
+ spin_unlock_irq(&card->lock);
+
+ return 0;
+}
+
+void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p)
+{
+ struct client *client;
+ struct inbound_phy_packet_event *e;
+ unsigned long flags;
+
+ spin_lock_irqsave(&card->lock, flags);
+
+ list_for_each_entry(client, &card->phy_receiver_list, phy_receiver_link) {
+ e = kmalloc(sizeof(*e) + 8, GFP_ATOMIC);
+ if (e == NULL) {
+ fw_notify("Out of memory when allocating event\n");
+ break;
+ }
+ e->phy_packet.closure = client->phy_receiver_closure;
+ e->phy_packet.type = FW_CDEV_EVENT_PHY_PACKET_RECEIVED;
+ e->phy_packet.rcode = RCODE_COMPLETE;
+ e->phy_packet.length = 8;
+ e->phy_packet.data[0] = p->header[1];
+ e->phy_packet.data[1] = p->header[2];
+ queue_event(client, &e->event,
+ &e->phy_packet, sizeof(e->phy_packet) + 8, NULL, 0);
+ }
+
+ spin_unlock_irqrestore(&card->lock, flags);
+}
+
static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
[0x00] = ioctl_get_info,
[0x01] = ioctl_send_request,
@@ -1470,6 +1528,7 @@ static int (* const ioctl_handlers[])(struct client *, union ioctl_arg *) = {
[0x13] = ioctl_send_stream_packet,
[0x14] = ioctl_get_cycle_timer2,
[0x15] = ioctl_send_phy_packet,
+ [0x16] = ioctl_receive_phy_packets,
};
static int dispatch_ioctl(struct client *client,
@@ -1577,6 +1636,10 @@ static int fw_device_op_release(struct inode *inode, struct file *file)
struct client *client = file->private_data;
struct event *event, *next_event;
+ spin_lock_irq(&client->device->card->lock);
+ list_del(&client->phy_receiver_link);
+ spin_unlock_irq(&client->device->card->lock);
+
mutex_lock(&client->device->client_list_mutex);
list_del(&client->link);
mutex_unlock(&client->device->client_list_mutex);
diff --git a/drivers/firewire/core-transaction.c b/drivers/firewire/core-transaction.c
index e2e4dc624fb6..6f225cacbc3d 100644
--- a/drivers/firewire/core-transaction.c
+++ b/drivers/firewire/core-transaction.c
@@ -883,6 +883,11 @@ void fw_core_handle_request(struct fw_card *card, struct fw_packet *p)
if (p->ack != ACK_PENDING && p->ack != ACK_COMPLETE)
return;
+ if (TCODE_IS_LINK_INTERNAL(HEADER_GET_TCODE(p->header[0]))) {
+ fw_cdev_handle_phy_packet(card, p);
+ return;
+ }
+
request = allocate_request(card, p);
if (request == NULL) {
/* FIXME: send statically allocated busy packet. */
diff --git a/drivers/firewire/core.h b/drivers/firewire/core.h
index ff6c90922001..3102b6b63438 100644
--- a/drivers/firewire/core.h
+++ b/drivers/firewire/core.h
@@ -128,6 +128,7 @@ extern const struct file_operations fw_device_ops;
void fw_device_cdev_update(struct fw_device *device);
void fw_device_cdev_remove(struct fw_device *device);
+void fw_cdev_handle_phy_packet(struct fw_card *card, struct fw_packet *p);
/* -device */
@@ -214,6 +215,7 @@ static inline bool is_next_generation(int new_generation, int old_generation)
#define TCODE_IS_READ_REQUEST(tcode) (((tcode) & ~1) == 4)
#define TCODE_IS_BLOCK_PACKET(tcode) (((tcode) & 1) != 0)
+#define TCODE_IS_LINK_INTERNAL(tcode) ((tcode) == 0xe)
#define TCODE_IS_REQUEST(tcode) (((tcode) & 2) == 0)
#define TCODE_IS_RESPONSE(tcode) (((tcode) & 2) != 0)
#define TCODE_HAS_REQUEST_DATA(tcode) (((tcode) & 12) != 4)
diff --git a/drivers/firewire/ohci.c b/drivers/firewire/ohci.c
index bb6a92bc9e6a..08afccc66333 100644
--- a/drivers/firewire/ohci.c
+++ b/drivers/firewire/ohci.c
@@ -1759,10 +1759,9 @@ static int ohci_enable(struct fw_card *card,
OHCI1394_HCControl_noByteSwapData);
reg_write(ohci, OHCI1394_SelfIDBuffer, ohci->self_id_bus);
- reg_write(ohci, OHCI1394_LinkControlClear,
- OHCI1394_LinkControl_rcvPhyPkt);
reg_write(ohci, OHCI1394_LinkControlSet,
OHCI1394_LinkControl_rcvSelfID |
+ OHCI1394_LinkControl_rcvPhyPkt |
OHCI1394_LinkControl_cycleTimerEnable |
OHCI1394_LinkControl_cycleMaster);
diff --git a/include/linux/firewire-cdev.h b/include/linux/firewire-cdev.h
index 5bc051b9a013..b87409160794 100644
--- a/include/linux/firewire-cdev.h
+++ b/include/linux/firewire-cdev.h
@@ -35,6 +35,7 @@
/* available since kernel version 2.6.36 */
#define FW_CDEV_EVENT_REQUEST2 0x06
#define FW_CDEV_EVENT_PHY_PACKET_SENT 0x07
+#define FW_CDEV_EVENT_PHY_PACKET_RECEIVED 0x08
/**
* struct fw_cdev_event_common - Common part of all fw_cdev_event_ types
@@ -285,16 +286,24 @@ struct fw_cdev_event_iso_resource {
};
/**
- * struct fw_cdev_event_phy_packet - A PHY packet was transmitted
- * @closure: See &fw_cdev_event_common;
- * set by %FW_CDEV_IOC_SEND_PHY_PACKET ioctl
- * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT
+ * struct fw_cdev_event_phy_packet - A PHY packet was transmitted or received
+ * @closure: See &fw_cdev_event_common; set by %FW_CDEV_IOC_SEND_PHY_PACKET
+ * or %FW_CDEV_IOC_RECEIVE_PHY_PACKETS ioctl
+ * @type: %FW_CDEV_EVENT_PHY_PACKET_SENT or %..._RECEIVED
* @rcode: %RCODE_..., indicates success or failure of transmission
+ * @length: Data length in bytes
+ * @data: Incoming data
+ *
+ * If @type is %FW_CDEV_EVENT_PHY_PACKET_SENT, @length is 0 and @data empty.
+ * If @type is %FW_CDEV_EVENT_PHY_PACKET_RECEIVED, @length is 8 and @data
+ * consists of the two PHY packet quadlets, in host byte order.
*/
struct fw_cdev_event_phy_packet {
__u64 closure;
__u32 type;
__u32 rcode;
+ __u32 length;
+ __u32 data[0];
};
/**
@@ -308,7 +317,9 @@ struct fw_cdev_event_phy_packet {
* @iso_resource: Valid if @common.type ==
* %FW_CDEV_EVENT_ISO_RESOURCE_ALLOCATED or
* %FW_CDEV_EVENT_ISO_RESOURCE_DEALLOCATED
- * @phy_packet: Valid if @common.type == %FW_CDEV_EVENT_PHY_PACKET_SENT
+ * @phy_packet: Valid if @common.type ==
+ * %FW_CDEV_EVENT_PHY_PACKET_SENT or
+ * %FW_CDEV_EVENT_PHY_PACKET_RECEIVED
*
* Convenience union for userspace use. Events could be read(2) into an
* appropriately aligned char buffer and then cast to this union for further
@@ -360,6 +371,7 @@ union fw_cdev_event {
/* available since kernel version 2.6.36 */
#define FW_CDEV_IOC_SEND_PHY_PACKET _IOWR('#', 0x15, struct fw_cdev_send_phy_packet)
+#define FW_CDEV_IOC_RECEIVE_PHY_PACKETS _IOW('#', 0x16, struct fw_cdev_receive_phy_packets)
/*
* ABI version history
@@ -376,9 +388,9 @@ union fw_cdev_event {
* - shared use and auto-response for FCP registers
* 3 (2.6.34) - made &fw_cdev_get_cycle_timer reliable
* - added %FW_CDEV_IOC_GET_CYCLE_TIMER2
- * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2, %FW_CDEV_EVENT_PHY_PACKET_SENT
+ * 4 (2.6.36) - added %FW_CDEV_EVENT_REQUEST2, %FW_CDEV_EVENT_PHY_PACKET_*
* - implemented &fw_cdev_event_bus_reset.bm_node_id
- * - added %FW_CDEV_IOC_SEND_PHY_PACKET
+ * - added %FW_CDEV_IOC_SEND_PHY_PACKET, _RECEIVE_PHY_PACKETS
*/
#define FW_CDEV_VERSION 3 /* Meaningless; don't use this macro. */
@@ -850,4 +862,17 @@ struct fw_cdev_send_phy_packet {
__u32 generation;
};
+/**
+ * struct fw_cdev_receive_phy_packets - start reception of PHY packets
+ * @closure: Passed back to userspace in phy packet events
+ *
+ * This ioctl activates issuing of %FW_CDEV_EVENT_PHY_PACKET_RECEIVED due to
+ * incoming PHY packets from any node on the same bus as the device.
+ *
+ * The ioctl is only permitted on device files which represent a local node.
+ */
+struct fw_cdev_receive_phy_packets {
+ __u64 closure;
+};
+
#endif /* _LINUX_FIREWIRE_CDEV_H */
diff --git a/include/linux/firewire.h b/include/linux/firewire.h
index 0c38b8e97722..d974aa4a24c9 100644
--- a/include/linux/firewire.h
+++ b/include/linux/firewire.h
@@ -111,9 +111,10 @@ struct fw_card {
bool beta_repeaters_present;
int index;
-
struct list_head link;
+ struct list_head phy_receiver_list;
+
struct delayed_work br_work; /* bus reset job */
bool br_short;
generated by cgit (git 2.34.1) at 2024-05-25 14:24:21 +0000