#define descriptor_irq_error (1 << 4)
#define descriptor_irq_always (3 << 4)
#define descriptor_branch_always (3 << 2)
+#define descriptor_wait (3 << 0)
struct descriptor {
__le16 req_count;
__le16 transfer_status;
} __attribute__((aligned(16)));
+struct db_descriptor {
+ __le16 first_size;
+ __le16 control;
+ __le16 second_req_count;
+ __le16 first_req_count;
+ __le32 branch_address;
+ __le16 second_res_count;
+ __le16 first_res_count;
+ __le32 reserved0;
+ __le32 first_buffer;
+ __le32 second_buffer;
+ __le32 reserved1;
+} __attribute__((aligned(16)));
+
+#define control_set(regs) (regs)
+#define control_clear(regs) ((regs) + 4)
+#define command_ptr(regs) ((regs) + 12)
+#define context_match(regs) ((regs) + 16)
+
+struct ar_buffer {
+ struct descriptor descriptor;
+ struct ar_buffer *next;
+ __le32 data[0];
+};
+
struct ar_context {
struct fw_ohci *ohci;
- struct descriptor descriptor;
- __le32 buffer[512];
- dma_addr_t descriptor_bus;
+ struct ar_buffer *current_buffer;
+ struct ar_buffer *last_buffer;
+ void *pointer;
+ u32 regs;
+ struct tasklet_struct tasklet;
+};
+
+struct context;
+
+typedef int (*descriptor_callback_t)(struct context *ctx,
+ struct descriptor *d,
+ struct descriptor *last);
+struct context {
+ struct fw_ohci *ohci;
+ u32 regs;
+
+ struct descriptor *buffer;
dma_addr_t buffer_bus;
+ size_t buffer_size;
+ struct descriptor *head_descriptor;
+ struct descriptor *tail_descriptor;
+ struct descriptor *tail_descriptor_last;
+ struct descriptor *prev_descriptor;
- u32 command_ptr;
- u32 control_set;
- u32 control_clear;
+ descriptor_callback_t callback;
- struct tasklet_struct tasklet;
+ struct tasklet_struct tasklet;
};
+
+
struct at_context {
struct fw_ohci *ohci;
dma_addr_t descriptor_bus;
dma_addr_t buffer_bus;
+ struct fw_packet *current_packet;
struct list_head list;
struct descriptor last;
} d;
- u32 command_ptr;
- u32 control_set;
- u32 control_clear;
+ u32 regs;
struct tasklet_struct tasklet;
};
struct iso_context {
struct fw_iso_context base;
- struct tasklet_struct tasklet;
- u32 control_set;
- u32 control_clear;
- u32 command_ptr;
- u32 context_match;
-
- struct descriptor *buffer;
- dma_addr_t buffer_bus;
- struct descriptor *head_descriptor;
- struct descriptor *tail_descriptor;
- struct descriptor *tail_descriptor_last;
- struct descriptor *prev_descriptor;
+ struct context context;
};
#define CONFIG_ROM_SIZE 1024
return container_of(card, struct fw_ohci, card);
}
-#define CONTEXT_CYCLE_MATCH_ENABLE 0x80000000
+#define IT_CONTEXT_CYCLE_MATCH_ENABLE 0x80000000
+#define IR_CONTEXT_BUFFER_FILL 0x80000000
+#define IR_CONTEXT_ISOCH_HEADER 0x40000000
+#define IR_CONTEXT_CYCLE_MATCH_ENABLE 0x20000000
+#define IR_CONTEXT_MULTI_CHANNEL_MODE 0x10000000
+#define IR_CONTEXT_DUAL_BUFFER_MODE 0x08000000
#define CONTEXT_RUN 0x8000
#define CONTEXT_WAKE 0x1000
#define OHCI_LOOP_COUNT 500
#define OHCI1394_PCI_HCI_Control 0x40
#define SELF_ID_BUF_SIZE 0x800
+#define OHCI_TCODE_PHY_PACKET 0x0e
static char ohci_driver_name[] = KBUILD_MODNAME;
return 0;
}
-static void ar_context_run(struct ar_context *ctx)
+static int ar_context_add_page(struct ar_context *ctx)
{
- reg_write(ctx->ohci, ctx->command_ptr, ctx->descriptor_bus | 1);
- reg_write(ctx->ohci, ctx->control_set, CONTEXT_RUN);
+ struct device *dev = ctx->ohci->card.device;
+ struct ar_buffer *ab;
+ dma_addr_t ab_bus;
+ size_t offset;
+
+ ab = (struct ar_buffer *) __get_free_page(GFP_ATOMIC);
+ if (ab == NULL)
+ return -ENOMEM;
+
+ ab_bus = dma_map_single(dev, ab, PAGE_SIZE, DMA_BIDIRECTIONAL);
+ if (dma_mapping_error(ab_bus)) {
+ free_page((unsigned long) ab);
+ return -ENOMEM;
+ }
+
+ memset(&ab->descriptor, 0, sizeof ab->descriptor);
+ ab->descriptor.control = cpu_to_le16(descriptor_input_more |
+ descriptor_status |
+ descriptor_branch_always);
+ offset = offsetof(struct ar_buffer, data);
+ ab->descriptor.req_count = cpu_to_le16(PAGE_SIZE - offset);
+ ab->descriptor.data_address = cpu_to_le32(ab_bus + offset);
+ ab->descriptor.res_count = cpu_to_le16(PAGE_SIZE - offset);
+ ab->descriptor.branch_address = 0;
+
+ dma_sync_single_for_device(dev, ab_bus, PAGE_SIZE, DMA_BIDIRECTIONAL);
+
+ ctx->last_buffer->descriptor.branch_address = ab_bus | 1;
+ ctx->last_buffer->next = ab;
+ ctx->last_buffer = ab;
+
+ reg_write(ctx->ohci, control_set(ctx->regs), CONTEXT_WAKE);
flush_writes(ctx->ohci);
+
+ return 0;
}
-static void ar_context_tasklet(unsigned long data)
+static __le32 *handle_ar_packet(struct ar_context *ctx, __le32 *buffer)
{
- struct ar_context *ctx = (struct ar_context *)data;
struct fw_ohci *ohci = ctx->ohci;
struct fw_packet p;
u32 status, length, tcode;
- /* FIXME: What to do about evt_* errors? */
- length = le16_to_cpu(ctx->descriptor.req_count) -
- le16_to_cpu(ctx->descriptor.res_count) - 4;
- status = le32_to_cpu(ctx->buffer[length / 4]);
-
- p.ack = ((status >> 16) & 0x1f) - 16;
- p.speed = (status >> 21) & 0x7;
- p.timestamp = status & 0xffff;
- p.generation = ohci->request_generation;
-
- p.header[0] = le32_to_cpu(ctx->buffer[0]);
- p.header[1] = le32_to_cpu(ctx->buffer[1]);
- p.header[2] = le32_to_cpu(ctx->buffer[2]);
+ p.header[0] = le32_to_cpu(buffer[0]);
+ p.header[1] = le32_to_cpu(buffer[1]);
+ p.header[2] = le32_to_cpu(buffer[2]);
tcode = (p.header[0] >> 4) & 0x0f;
switch (tcode) {
case TCODE_WRITE_QUADLET_REQUEST:
case TCODE_READ_QUADLET_RESPONSE:
- p.header[3] = ctx->buffer[3];
+ p.header[3] = (__force __u32) buffer[3];
p.header_length = 16;
+ p.payload_length = 0;
break;
- case TCODE_WRITE_BLOCK_REQUEST:
case TCODE_READ_BLOCK_REQUEST :
+ p.header[3] = le32_to_cpu(buffer[3]);
+ p.header_length = 16;
+ p.payload_length = 0;
+ break;
+
+ case TCODE_WRITE_BLOCK_REQUEST:
case TCODE_READ_BLOCK_RESPONSE:
case TCODE_LOCK_REQUEST:
case TCODE_LOCK_RESPONSE:
- p.header[3] = le32_to_cpu(ctx->buffer[3]);
+ p.header[3] = le32_to_cpu(buffer[3]);
p.header_length = 16;
+ p.payload_length = p.header[3] >> 16;
break;
case TCODE_WRITE_RESPONSE:
case TCODE_READ_QUADLET_REQUEST:
+ case OHCI_TCODE_PHY_PACKET:
p.header_length = 12;
+ p.payload_length = 0;
break;
}
- p.payload = (void *) ctx->buffer + p.header_length;
- p.payload_length = length - p.header_length;
+ p.payload = (void *) buffer + p.header_length;
+
+ /* FIXME: What to do about evt_* errors? */
+ length = (p.header_length + p.payload_length + 3) / 4;
+ status = le32_to_cpu(buffer[length]);
+
+ p.ack = ((status >> 16) & 0x1f) - 16;
+ p.speed = (status >> 21) & 0x7;
+ p.timestamp = status & 0xffff;
+ p.generation = ohci->request_generation;
/* The OHCI bus reset handler synthesizes a phy packet with
* the new generation number when a bus reset happens (see
* request. */
if (p.ack + 16 == 0x09)
- ohci->request_generation = (ctx->buffer[2] >> 16) & 0xff;
+ ohci->request_generation = (buffer[2] >> 16) & 0xff;
else if (ctx == &ohci->ar_request_ctx)
fw_core_handle_request(&ohci->card, &p);
else
fw_core_handle_response(&ohci->card, &p);
- ctx->descriptor.data_address = cpu_to_le32(ctx->buffer_bus);
- ctx->descriptor.req_count = cpu_to_le16(sizeof ctx->buffer);
- ctx->descriptor.res_count = cpu_to_le16(sizeof ctx->buffer);
+ return buffer + length + 1;
+}
+
+static void ar_context_tasklet(unsigned long data)
+{
+ struct ar_context *ctx = (struct ar_context *)data;
+ struct fw_ohci *ohci = ctx->ohci;
+ struct ar_buffer *ab;
+ struct descriptor *d;
+ void *buffer, *end;
+
+ ab = ctx->current_buffer;
+ d = &ab->descriptor;
+
+ if (d->res_count == 0) {
+ size_t size, rest, offset;
+
+ /* This descriptor is finished and we may have a
+ * packet split across this and the next buffer. We
+ * reuse the page for reassembling the split packet. */
+
+ offset = offsetof(struct ar_buffer, data);
+ dma_unmap_single(ohci->card.device,
+ ab->descriptor.data_address - offset,
+ PAGE_SIZE, DMA_BIDIRECTIONAL);
+
+ buffer = ab;
+ ab = ab->next;
+ d = &ab->descriptor;
+ size = buffer + PAGE_SIZE - ctx->pointer;
+ rest = le16_to_cpu(d->req_count) - le16_to_cpu(d->res_count);
+ memmove(buffer, ctx->pointer, size);
+ memcpy(buffer + size, ab->data, rest);
+ ctx->current_buffer = ab;
+ ctx->pointer = (void *) ab->data + rest;
+ end = buffer + size + rest;
+
+ while (buffer < end)
+ buffer = handle_ar_packet(ctx, buffer);
+
+ free_page((unsigned long)buffer);
+ ar_context_add_page(ctx);
+ } else {
+ buffer = ctx->pointer;
+ ctx->pointer = end =
+ (void *) ab + PAGE_SIZE - le16_to_cpu(d->res_count);
+
+ while (buffer < end)
+ buffer = handle_ar_packet(ctx, buffer);
+ }
+}
+
+static int
+ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 regs)
+{
+ struct ar_buffer ab;
+
+ ctx->regs = regs;
+ ctx->ohci = ohci;
+ ctx->last_buffer = &ab;
+ tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx);
+
+ ar_context_add_page(ctx);
+ ar_context_add_page(ctx);
+ ctx->current_buffer = ab.next;
+ ctx->pointer = ctx->current_buffer->data;
+
+ reg_write(ctx->ohci, command_ptr(ctx->regs), ab.descriptor.branch_address);
+ reg_write(ctx->ohci, control_set(ctx->regs), CONTEXT_RUN);
+ flush_writes(ctx->ohci);
+
+ return 0;
+}
+
+static void context_tasklet(unsigned long data)
+{
+ struct context *ctx = (struct context *) data;
+ struct fw_ohci *ohci = ctx->ohci;
+ struct descriptor *d, *last;
+ u32 address;
+ int z;
+
+ dma_sync_single_for_cpu(ohci->card.device, ctx->buffer_bus,
+ ctx->buffer_size, DMA_TO_DEVICE);
+
+ d = ctx->tail_descriptor;
+ last = ctx->tail_descriptor_last;
- dma_sync_single_for_device(ohci->card.device, ctx->descriptor_bus,
- sizeof ctx->descriptor_bus, DMA_TO_DEVICE);
+ while (last->branch_address != 0) {
+ address = le32_to_cpu(last->branch_address);
+ z = address & 0xf;
+ d = ctx->buffer + (address - ctx->buffer_bus) / sizeof *d;
+ last = (z == 2) ? d : d + z - 1;
- /* FIXME: We stop and restart the ar context here, what if we
- * stop while a receive is in progress? Maybe we could just
- * loop the context back to itself and use it in buffer fill
- * mode as intended... */
+ if (!ctx->callback(ctx, d, last))
+ break;
- reg_write(ctx->ohci, ctx->control_clear, CONTEXT_RUN);
- ar_context_run(ctx);
+ ctx->tail_descriptor = d;
+ ctx->tail_descriptor_last = last;
+ }
}
static int
-ar_context_init(struct ar_context *ctx, struct fw_ohci *ohci, u32 control_set)
+context_init(struct context *ctx, struct fw_ohci *ohci,
+ size_t buffer_size, u32 regs,
+ descriptor_callback_t callback)
{
- ctx->descriptor_bus =
- dma_map_single(ohci->card.device, &ctx->descriptor,
- sizeof ctx->descriptor, DMA_TO_DEVICE);
- if (ctx->descriptor_bus == 0)
+ ctx->ohci = ohci;
+ ctx->regs = regs;
+ ctx->buffer_size = buffer_size;
+ ctx->buffer = kmalloc(buffer_size, GFP_KERNEL);
+ if (ctx->buffer == NULL)
return -ENOMEM;
- if (ctx->descriptor_bus & 0xf)
- fw_notify("descriptor not 16-byte aligned: 0x%08lx\n",
- (unsigned long)ctx->descriptor_bus);
+ tasklet_init(&ctx->tasklet, context_tasklet, (unsigned long)ctx);
+ ctx->callback = callback;
ctx->buffer_bus =
dma_map_single(ohci->card.device, ctx->buffer,
- sizeof ctx->buffer, DMA_FROM_DEVICE);
-
- if (ctx->buffer_bus == 0) {
- dma_unmap_single(ohci->card.device, ctx->descriptor_bus,
- sizeof ctx->descriptor, DMA_TO_DEVICE);
+ buffer_size, DMA_TO_DEVICE);
+ if (dma_mapping_error(ctx->buffer_bus)) {
+ kfree(ctx->buffer);
return -ENOMEM;
}
- memset(&ctx->descriptor, 0, sizeof ctx->descriptor);
- ctx->descriptor.control = cpu_to_le16(descriptor_input_more |
- descriptor_status |
- descriptor_branch_always);
- ctx->descriptor.req_count = cpu_to_le16(sizeof ctx->buffer);
- ctx->descriptor.data_address = cpu_to_le32(ctx->buffer_bus);
- ctx->descriptor.res_count = cpu_to_le16(sizeof ctx->buffer);
-
- ctx->control_set = control_set;
- ctx->control_clear = control_set + 4;
- ctx->command_ptr = control_set + 12;
- ctx->ohci = ohci;
+ ctx->head_descriptor = ctx->buffer;
+ ctx->prev_descriptor = ctx->buffer;
+ ctx->tail_descriptor = ctx->buffer;
+ ctx->tail_descriptor_last = ctx->buffer;
- tasklet_init(&ctx->tasklet, ar_context_tasklet, (unsigned long)ctx);
+ /* We put a dummy descriptor in the buffer that has a NULL
+ * branch address and looks like it's been sent. That way we
+ * have a descriptor to append DMA programs to. Also, the
+ * ring buffer invariant is that it always has at least one
+ * element so that head == tail means buffer full. */
- ar_context_run(ctx);
+ memset(ctx->head_descriptor, 0, sizeof *ctx->head_descriptor);
+ ctx->head_descriptor->control = cpu_to_le16(descriptor_output_last);
+ ctx->head_descriptor->transfer_status = cpu_to_le16(0x8011);
+ ctx->head_descriptor++;
return 0;
}
+ static void
+context_release(struct context *ctx)
+{
+ struct fw_card *card = &ctx->ohci->card;
+
+ dma_unmap_single(card->device, ctx->buffer_bus,
+ ctx->buffer_size, DMA_TO_DEVICE);
+ kfree(ctx->buffer);
+}
+
+static struct descriptor *
+context_get_descriptors(struct context *ctx, int z, dma_addr_t *d_bus)
+{
+ struct descriptor *d, *tail, *end;
+
+ d = ctx->head_descriptor;
+ tail = ctx->tail_descriptor;
+ end = ctx->buffer + ctx->buffer_size / sizeof(struct descriptor);
+
+ if (d + z <= tail) {
+ goto has_space;
+ } else if (d > tail && d + z <= end) {
+ goto has_space;
+ } else if (d > tail && ctx->buffer + z <= tail) {
+ d = ctx->buffer;
+ goto has_space;
+ }
+
+ return NULL;
+
+ has_space:
+ memset(d, 0, z * sizeof *d);
+ *d_bus = ctx->buffer_bus + (d - ctx->buffer) * sizeof *d;
+
+ return d;
+}
+
+static void context_run(struct context *ctx, u32 extra)
+{
+ struct fw_ohci *ohci = ctx->ohci;
+
+ reg_write(ohci, command_ptr(ctx->regs),
+ le32_to_cpu(ctx->tail_descriptor_last->branch_address));
+ reg_write(ohci, control_clear(ctx->regs), ~0);
+ reg_write(ohci, control_set(ctx->regs), CONTEXT_RUN | extra);
+ flush_writes(ohci);
+}
+
+static void context_append(struct context *ctx,
+ struct descriptor *d, int z, int extra)
+{
+ dma_addr_t d_bus;
+
+ d_bus = ctx->buffer_bus + (d - ctx->buffer) * sizeof *d;
+
+ ctx->head_descriptor = d + z + extra;
+ ctx->prev_descriptor->branch_address = cpu_to_le32(d_bus | z);
+ ctx->prev_descriptor = z == 2 ? d : d + z - 1;
+
+ dma_sync_single_for_device(ctx->ohci->card.device, ctx->buffer_bus,
+ ctx->buffer_size, DMA_TO_DEVICE);
+
+ reg_write(ctx->ohci, control_set(ctx->regs), CONTEXT_WAKE);
+ flush_writes(ctx->ohci);
+}
+
+static void context_stop(struct context *ctx)
+{
+ u32 reg;
+ int i;
+
+ reg_write(ctx->ohci, control_clear(ctx->regs), CONTEXT_RUN);
+ flush_writes(ctx->ohci);
+
+ for (i = 0; i < 10; i++) {
+ reg = reg_read(ctx->ohci, control_set(ctx->regs));
+ if ((reg & CONTEXT_ACTIVE) == 0)
+ break;
+
+ fw_notify("context_stop: still active (0x%08x)\n", reg);
+ msleep(1);
+ }
+}
+
static void
do_packet_callbacks(struct fw_ohci *ohci, struct list_head *list)
{
packet->payload,
packet->payload_length,
DMA_TO_DEVICE);
- if (packet->payload_bus == 0) {
- complete_transmission(packet, -ENOMEM, list);
+ if (dma_mapping_error(packet->payload_bus)) {
+ complete_transmission(packet, RCODE_SEND_ERROR, list);
return;
}
/* FIXME: Document how the locking works. */
if (ohci->generation == packet->generation) {
- reg_write(ctx->ohci, ctx->command_ptr,
+ reg_write(ctx->ohci, command_ptr(ctx->regs),
ctx->descriptor_bus | z);
- reg_write(ctx->ohci, ctx->control_set,
+ reg_write(ctx->ohci, control_set(ctx->regs),
CONTEXT_RUN | CONTEXT_WAKE);
+ ctx->current_packet = packet;
} else {
/* We dont return error codes from this function; all
* transmission errors are reported through the
* callback. */
- complete_transmission(packet, -ESTALE, list);
+ complete_transmission(packet, RCODE_GENERATION, list);
}
}
{
u32 reg;
- reg_write(ctx->ohci, ctx->control_clear, CONTEXT_RUN);
+ reg_write(ctx->ohci, control_clear(ctx->regs), CONTEXT_RUN);
- reg = reg_read(ctx->ohci, ctx->control_set);
+ reg = reg_read(ctx->ohci, control_set(ctx->regs));
if (reg & CONTEXT_ACTIVE)
fw_notify("Tried to stop context, but it is still active "
"(0x%08x).\n", reg);
at_context_stop(ctx);
+ /* If the head of the list isn't the packet that just got
+ * transmitted, the packet got cancelled before we finished
+ * transmitting it. */
+ if (ctx->current_packet != packet)
+ goto skip_to_next;
+
if (packet->payload_length > 0) {
dma_unmap_single(ohci->card.device, packet->payload_bus,
packet->payload_length, DMA_TO_DEVICE);
switch (evt) {
case OHCI1394_evt_timeout:
/* Async response transmit timed out. */
- complete_transmission(packet, -ETIMEDOUT, &list);
+ complete_transmission(packet, RCODE_CANCELLED, &list);
break;
case OHCI1394_evt_flushed:
/* The packet was flushed should give same
* error as when we try to use a stale
* generation count. */
- complete_transmission(packet, -ESTALE, &list);
+ complete_transmission(packet,
+ RCODE_GENERATION, &list);
break;
case OHCI1394_evt_missing_ack:
- /* This would be a higher level software
- * error, it is using a valid (current)
- * generation count, but the node is not on
- * the bus. */
- complete_transmission(packet, -ENODEV, &list);
+ /* Using a valid (current) generation count,
+ * but the node is not on the bus or not
+ * sending acks. */
+ complete_transmission(packet, RCODE_NO_ACK, &list);
break;
default:
- complete_transmission(packet, -EIO, &list);
+ complete_transmission(packet, RCODE_SEND_ERROR, &list);
break;
}
} else
complete_transmission(packet, evt - 16, &list);
+ skip_to_next:
/* If more packets are queued, set up the next one. */
if (!list_empty(&ctx->list))
at_context_setup_packet(ctx, &list);
}
static int
-at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 control_set)
+at_context_init(struct at_context *ctx, struct fw_ohci *ohci, u32 regs)
{
INIT_LIST_HEAD(&ctx->list);
ctx->descriptor_bus =
dma_map_single(ohci->card.device, &ctx->d,
sizeof ctx->d, DMA_TO_DEVICE);
- if (ctx->descriptor_bus == 0)
+ if (dma_mapping_error(ctx->descriptor_bus))
return -ENOMEM;
- ctx->control_set = control_set;
- ctx->control_clear = control_set + 4;
- ctx->command_ptr = control_set + 12;
- ctx->ohci = ohci;
+ ctx->regs = regs;
+ ctx->ohci = ohci;
tasklet_init(&ctx->tasklet, at_context_tasklet, (unsigned long)ctx);
if (event & OHCI1394_respTxComplete)
tasklet_schedule(&ohci->at_response_ctx.tasklet);
- iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventSet);
+ iso_event = reg_read(ohci, OHCI1394_IsoRecvIntEventClear);
reg_write(ohci, OHCI1394_IsoRecvIntEventClear, iso_event);
while (iso_event) {
i = ffs(iso_event) - 1;
- tasklet_schedule(&ohci->ir_context_list[i].tasklet);
+ tasklet_schedule(&ohci->ir_context_list[i].context.tasklet);
iso_event &= ~(1 << i);
}
- iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventSet);
+ iso_event = reg_read(ohci, OHCI1394_IsoXmitIntEventClear);
reg_write(ohci, OHCI1394_IsoXmitIntEventClear, iso_event);
while (iso_event) {
i = ffs(iso_event) - 1;
- tasklet_schedule(&ohci->it_context_list[i].tasklet);
+ tasklet_schedule(&ohci->it_context_list[i].context.tasklet);
iso_event &= ~(1 << i);
}
at_context_transmit(&ohci->at_response_ctx, packet);
}
+static int ohci_cancel_packet(struct fw_card *card, struct fw_packet *packet)
+{
+ struct fw_ohci *ohci = fw_ohci(card);
+ LIST_HEAD(list);
+ unsigned long flags;
+
+ spin_lock_irqsave(&ohci->lock, flags);
+
+ if (packet->ack == 0) {
+ fw_notify("cancelling packet %p (header[0]=%08x)\n",
+ packet, packet->header[0]);
+
+ complete_transmission(packet, RCODE_CANCELLED, &list);
+ }
+
+ spin_unlock_irqrestore(&ohci->lock, flags);
+
+ do_packet_callbacks(ohci, &list);
+
+ /* Return success if we actually cancelled something. */
+ return list_empty(&list) ? -ENOENT : 0;
+}
+
static int
ohci_enable_phys_dma(struct fw_card *card, int node_id, int generation)
{
return retval;
}
-static void ir_context_tasklet(unsigned long data)
+static int handle_ir_packet(struct context *context,
+ struct descriptor *d,
+ struct descriptor *last)
{
- struct iso_context *ctx = (struct iso_context *)data;
-
- (void)ctx;
+ struct iso_context *ctx =
+ container_of(context, struct iso_context, context);
+ struct db_descriptor *db = (struct db_descriptor *) d;
+
+ if (db->first_res_count > 0 && db->second_res_count > 0)
+ /* This descriptor isn't done yet, stop iteration. */
+ return 0;
+
+ if (le16_to_cpu(db->control) & descriptor_irq_always)
+ /* FIXME: we should pass payload address here. */
+ ctx->base.callback(&ctx->base,
+ 0, 0,
+ ctx->base.callback_data);
+
+ return 1;
}
#define ISO_BUFFER_SIZE (64 * 1024)
-static void flush_iso_context(struct iso_context *ctx)
-{
- struct fw_ohci *ohci = fw_ohci(ctx->base.card);
- struct descriptor *d, *last;
- u32 address;
- int z;
-
- dma_sync_single_for_cpu(ohci->card.device, ctx->buffer_bus,
- ISO_BUFFER_SIZE, DMA_TO_DEVICE);
-
- d = ctx->tail_descriptor;
- last = ctx->tail_descriptor_last;
-
- while (last->branch_address != 0 && last->transfer_status != 0) {
- address = le32_to_cpu(last->branch_address);
- z = address & 0xf;
- d = ctx->buffer + (address - ctx->buffer_bus) / sizeof *d;
-
- if (z == 2)
- last = d;
- else
- last = d + z - 1;
-
- if (le16_to_cpu(last->control) & descriptor_irq_always)
- ctx->base.callback(&ctx->base,
- 0, le16_to_cpu(last->res_count),
- ctx->base.callback_data);
- }
-
- ctx->tail_descriptor = d;
- ctx->tail_descriptor_last = last;
-}
-
-static void it_context_tasklet(unsigned long data)
+static int handle_it_packet(struct context *context,
+ struct descriptor *d,
+ struct descriptor *last)
{
- struct iso_context *ctx = (struct iso_context *)data;
-
- flush_iso_context(ctx);
+ struct iso_context *ctx =
+ container_of(context, struct iso_context, context);
+
+ if (last->transfer_status == 0)
+ /* This descriptor isn't done yet, stop iteration. */
+ return 0;
+
+ if (le16_to_cpu(last->control) & descriptor_irq_always)
+ ctx->base.callback(&ctx->base,
+ 0, le16_to_cpu(last->res_count),
+ ctx->base.callback_data);
+
+ return 1;
}
-static struct fw_iso_context *ohci_allocate_iso_context(struct fw_card *card,
- int type)
+static struct fw_iso_context *
+ohci_allocate_iso_context(struct fw_card *card, int type)
{
struct fw_ohci *ohci = fw_ohci(card);
struct iso_context *ctx, *list;
- void (*tasklet) (unsigned long data);
- u32 *mask;
+ descriptor_callback_t callback;
+ u32 *mask, regs;
unsigned long flags;
- int index;
+ int index, retval;
if (type == FW_ISO_CONTEXT_TRANSMIT) {
mask = &ohci->it_context_mask;
list = ohci->it_context_list;
- tasklet = it_context_tasklet;
+ callback = handle_it_packet;
} else {
- mask = &ohci->ir_context_mask;
- list = ohci->ir_context_list;
- tasklet = ir_context_tasklet;
+ mask = &ohci->ir_context_mask;
+ list = ohci->ir_context_list;
+ callback = handle_ir_packet;
}
spin_lock_irqsave(&ohci->lock, flags);
if (index < 0)
return ERR_PTR(-EBUSY);
+ if (type == FW_ISO_CONTEXT_TRANSMIT)
+ regs = OHCI1394_IsoXmitContextBase(index);
+ else
+ regs = OHCI1394_IsoRcvContextBase(index);
+
ctx = &list[index];
memset(ctx, 0, sizeof *ctx);
- tasklet_init(&ctx->tasklet, tasklet, (unsigned long)ctx);
-
- ctx->buffer = kmalloc(ISO_BUFFER_SIZE, GFP_KERNEL);
- if (ctx->buffer == NULL) {
+ retval = context_init(&ctx->context, ohci, ISO_BUFFER_SIZE,
+ regs, callback);
+ if (retval < 0) {
spin_lock_irqsave(&ohci->lock, flags);
*mask |= 1 << index;
spin_unlock_irqrestore(&ohci->lock, flags);
- return ERR_PTR(-ENOMEM);
+ return ERR_PTR(retval);
}
- ctx->buffer_bus =
- dma_map_single(card->device, ctx->buffer,
- ISO_BUFFER_SIZE, DMA_TO_DEVICE);
+ return &ctx->base;
+}
- ctx->head_descriptor = ctx->buffer;
- ctx->prev_descriptor = ctx->buffer;
- ctx->tail_descriptor = ctx->buffer;
- ctx->tail_descriptor_last = ctx->buffer;
+static int ohci_start_iso(struct fw_iso_context *base, s32 cycle)
+{
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
+ struct fw_ohci *ohci = ctx->context.ohci;
+ u32 cycle_match = 0;
+ int index;
- /* We put a dummy descriptor in the buffer that has a NULL
- * branch address and looks like it's been sent. That way we
- * have a descriptor to append DMA programs to. Also, the
- * ring buffer invariant is that it always has at least one
- * element so that head == tail means buffer full. */
+ if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
+ index = ctx - ohci->it_context_list;
+ if (cycle > 0)
+ cycle_match = IT_CONTEXT_CYCLE_MATCH_ENABLE |
+ (cycle & 0x7fff) << 16;
+
+ reg_write(ohci, OHCI1394_IsoXmitIntEventClear, 1 << index);
+ reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index);
+ context_run(&ctx->context, cycle_match);
+ } else {
+ index = ctx - ohci->ir_context_list;
- memset(ctx->head_descriptor, 0, sizeof *ctx->head_descriptor);
- ctx->head_descriptor->control = cpu_to_le16(descriptor_output_last);
- ctx->head_descriptor->transfer_status = cpu_to_le16(0x8011);
- ctx->head_descriptor++;
+ reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index);
+ reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index);
+ reg_write(ohci, context_match(ctx->context.regs),
+ 0xf0000000 | ctx->base.channel);
+ context_run(&ctx->context, IR_CONTEXT_DUAL_BUFFER_MODE);
+ }
- return &ctx->base;
+ return 0;
}
-static int ohci_send_iso(struct fw_iso_context *base, s32 cycle)
+static int ohci_stop_iso(struct fw_iso_context *base)
{
- struct iso_context *ctx = (struct iso_context *)base;
- struct fw_ohci *ohci = fw_ohci(ctx->base.card);
- u32 cycle_match = 0;
+ struct fw_ohci *ohci = fw_ohci(base->card);
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
int index;
- index = ctx - ohci->it_context_list;
- if (cycle > 0)
- cycle_match = CONTEXT_CYCLE_MATCH_ENABLE |
- (cycle & 0x7fff) << 16;
-
- reg_write(ohci, OHCI1394_IsoXmitIntMaskSet, 1 << index);
- reg_write(ohci, OHCI1394_IsoXmitCommandPtr(index),
- le32_to_cpu(ctx->tail_descriptor_last->branch_address));
- reg_write(ohci, OHCI1394_IsoXmitContextControlClear(index), ~0);
- reg_write(ohci, OHCI1394_IsoXmitContextControlSet(index),
- CONTEXT_RUN | cycle_match);
+ if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
+ index = ctx - ohci->it_context_list;
+ reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
+ } else {
+ index = ctx - ohci->ir_context_list;
+ reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
+ }
flush_writes(ohci);
+ context_stop(&ctx->context);
return 0;
}
static void ohci_free_iso_context(struct fw_iso_context *base)
{
struct fw_ohci *ohci = fw_ohci(base->card);
- struct iso_context *ctx = (struct iso_context *)base;
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
unsigned long flags;
int index;
- flush_iso_context(ctx);
+ ohci_stop_iso(base);
+ context_release(&ctx->context);
spin_lock_irqsave(&ohci->lock, flags);
if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
index = ctx - ohci->it_context_list;
- reg_write(ohci, OHCI1394_IsoXmitContextControlClear(index), ~0);
- reg_write(ohci, OHCI1394_IsoXmitIntMaskClear, 1 << index);
ohci->it_context_mask |= 1 << index;
} else {
index = ctx - ohci->ir_context_list;
- reg_write(ohci, OHCI1394_IsoRcvContextControlClear(index), ~0);
- reg_write(ohci, OHCI1394_IsoRecvIntMaskClear, 1 << index);
ohci->ir_context_mask |= 1 << index;
}
- flush_writes(ohci);
-
- dma_unmap_single(ohci->card.device, ctx->buffer_bus,
- ISO_BUFFER_SIZE, DMA_TO_DEVICE);
spin_unlock_irqrestore(&ohci->lock, flags);
}
static int
-ohci_queue_iso(struct fw_iso_context *base,
- struct fw_iso_packet *packet, void *payload)
+ohci_queue_iso_transmit(struct fw_iso_context *base,
+ struct fw_iso_packet *packet,
+ struct fw_iso_buffer *buffer,
+ unsigned long payload)
{
- struct iso_context *ctx = (struct iso_context *)base;
- struct fw_ohci *ohci = fw_ohci(ctx->base.card);
- struct descriptor *d, *end, *last, *tail, *pd;
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
+ struct descriptor *d, *last, *pd;
struct fw_iso_packet *p;
__le32 *header;
- dma_addr_t d_bus;
+ dma_addr_t d_bus, page_bus;
u32 z, header_z, payload_z, irq;
u32 payload_index, payload_end_index, next_page_index;
- int index, page, end_page, i, length, offset;
+ int page, end_page, i, length, offset;
/* FIXME: Cycle lost behavior should be configurable: lose
* packet, retransmit or terminate.. */
p = packet;
- payload_index = payload - ctx->base.buffer;
- d = ctx->head_descriptor;
- tail = ctx->tail_descriptor;
- end = ctx->buffer + ISO_BUFFER_SIZE / sizeof(struct descriptor);
+ payload_index = payload;
if (p->skip)
z = 1;
/* Get header size in number of descriptors. */
header_z = DIV_ROUND_UP(p->header_length, sizeof *d);
- if (d + z + header_z <= tail) {
- goto has_space;
- } else if (d > tail && d + z + header_z <= end) {
- goto has_space;
- } else if (d > tail && ctx->buffer + z + header_z <= tail) {
- d = ctx->buffer;
- goto has_space;
- }
-
- /* No space in buffer */
- return -1;
-
- has_space:
- memset(d, 0, (z + header_z) * sizeof *d);
- d_bus = ctx->buffer_bus + (d - ctx->buffer) * sizeof *d;
+ d = context_get_descriptors(&ctx->context, z + header_z, &d_bus);
+ if (d == NULL)
+ return -ENOMEM;
if (!p->skip) {
d[0].control = cpu_to_le16(descriptor_key_immediate);
length =
min(next_page_index, payload_end_index) - payload_index;
pd[i].req_count = cpu_to_le16(length);
- pd[i].data_address = cpu_to_le32(ctx->base.pages[page] + offset);
+
+ page_bus = page_private(buffer->pages[page]);
+ pd[i].data_address = cpu_to_le32(page_bus + offset);
payload_index += length;
}
- if (z == 2)
- last = d;
- else
- last = d + z - 1;
-
if (p->interrupt)
irq = descriptor_irq_always;
else
irq = descriptor_no_irq;
- last->control = cpu_to_le16(descriptor_output_last |
- descriptor_status |
- descriptor_branch_always |
- irq);
+ last = z == 2 ? d : d + z - 1;
+ last->control |= cpu_to_le16(descriptor_output_last |
+ descriptor_status |
+ descriptor_branch_always |
+ irq);
- dma_sync_single_for_device(ohci->card.device, ctx->buffer_bus,
- ISO_BUFFER_SIZE, DMA_TO_DEVICE);
+ context_append(&ctx->context, d, z, header_z);
- ctx->head_descriptor = d + z + header_z;
- ctx->prev_descriptor->branch_address = cpu_to_le32(d_bus | z);
- ctx->prev_descriptor = last;
+ return 0;
+}
- index = ctx - ohci->it_context_list;
- reg_write(ohci, OHCI1394_IsoXmitContextControlSet(index), CONTEXT_WAKE);
- flush_writes(ohci);
+static int
+ohci_queue_iso_receive(struct fw_iso_context *base,
+ struct fw_iso_packet *packet,
+ struct fw_iso_buffer *buffer,
+ unsigned long payload)
+{
+ struct iso_context *ctx = container_of(base, struct iso_context, base);
+ struct db_descriptor *db = NULL;
+ struct descriptor *d;
+ struct fw_iso_packet *p;
+ dma_addr_t d_bus, page_bus;
+ u32 z, header_z, length, rest;
+ int page, offset;
+
+ /* FIXME: Cycle lost behavior should be configurable: lose
+ * packet, retransmit or terminate.. */
- return 0;
+ p = packet;
+ z = 2;
+
+ /* Get header size in number of descriptors. */
+ header_z = DIV_ROUND_UP(p->header_length, sizeof *d);
+ page = payload >> PAGE_SHIFT;
+ offset = payload & ~PAGE_MASK;
+ rest = p->payload_length;
+
+ /* FIXME: OHCI 1.0 doesn't support dual buffer receive */
+ /* FIXME: handle descriptor_wait */
+ /* FIXME: make packet-per-buffer/dual-buffer a context option */
+ while (rest > 0) {
+ d = context_get_descriptors(&ctx->context,
+ z + header_z, &d_bus);
+ if (d == NULL)
+ return -ENOMEM;
+
+ db = (struct db_descriptor *) d;
+ db->control = cpu_to_le16(descriptor_status |
+ descriptor_branch_always);
+ db->first_size = cpu_to_le16(ctx->base.header_size);
+ db->first_req_count = cpu_to_le16(p->header_length);
+ db->second_req_count = cpu_to_le16(p->payload_length);
+ db->first_res_count = cpu_to_le16(db->first_req_count);
+ db->second_res_count = cpu_to_le16(db->second_req_count);
+
+ db->first_buffer = cpu_to_le32(d_bus + sizeof *db);
+
+ if (offset + rest < PAGE_SIZE)
+ length = rest;
+ else
+ length = PAGE_SIZE - offset;
+
+ page_bus = page_private(buffer->pages[page]);
+ db->second_buffer = cpu_to_le32(page_bus + offset);
+
+ context_append(&ctx->context, d, z, header_z);
+ offset = (offset + length) & ~PAGE_MASK;
+ rest -= length;
+ page++;
+ }
+
+ if (p->interrupt)
+ db->control |= cpu_to_le16(descriptor_irq_always);
+
+ return 0;
+ }
+
+static int
+ohci_queue_iso(struct fw_iso_context *base,
+ struct fw_iso_packet *packet,
+ struct fw_iso_buffer *buffer,
+ unsigned long payload)
+{
+ if (base->type == FW_ISO_CONTEXT_TRANSMIT)
+ return ohci_queue_iso_transmit(base, packet, buffer, payload);
+ else
+ return ohci_queue_iso_receive(base, packet, buffer, payload);
}
static const struct fw_card_driver ohci_driver = {
.set_config_rom = ohci_set_config_rom,
.send_request = ohci_send_request,
.send_response = ohci_send_response,
+ .cancel_packet = ohci_cancel_packet,
.enable_phys_dma = ohci_enable_phys_dma,
.allocate_iso_context = ohci_allocate_iso_context,
.free_iso_context = ohci_free_iso_context,
.queue_iso = ohci_queue_iso,
- .send_iso = ohci_send_iso,
+ .start_iso = ohci_start_iso,
+ .stop_iso = ohci_stop_iso,
};
static int software_reset(struct fw_ohci *ohci)
projects / firefly-linux-kernel-4.4.55.git / blobdiff