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path: root/drivers/firewire/fw-ohci.c
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Diffstat (limited to 'drivers/firewire/fw-ohci.c')
-rw-r--r--drivers/firewire/fw-ohci.c99
1 files changed, 49 insertions, 50 deletions
diff --git a/drivers/firewire/fw-ohci.c b/drivers/firewire/fw-ohci.c
index a44d16d0c50..a9f2d07e7c6 100644
--- a/drivers/firewire/fw-ohci.c
+++ b/drivers/firewire/fw-ohci.c
@@ -1461,24 +1461,24 @@ static int handle_ir_packet_per_buffer(struct context *context,
{
struct iso_context *ctx =
container_of(context, struct iso_context, context);
- struct descriptor *pd = d + 1;
+ struct descriptor *pd;
__le32 *ir_header;
- size_t header_length;
- void *p, *end;
- int i, z;
+ void *p;
+ int i;
- if (pd->res_count == pd->req_count)
+ for (pd = d; pd <= last; pd++) {
+ if (pd->transfer_status)
+ break;
+ }
+ if (pd > last)
/* Descriptor(s) not done yet, stop iteration */
return 0;
- header_length = le16_to_cpu(d->req_count);
-
i = ctx->header_length;
- z = le32_to_cpu(pd->branch_address) & 0xf;
- p = d + z;
- end = p + header_length;
+ p = last + 1;
- while (p < end && i + ctx->base.header_size <= PAGE_SIZE) {
+ if (ctx->base.header_size > 0 &&
+ i + ctx->base.header_size <= PAGE_SIZE) {
/*
* The iso header is byteswapped to little endian by
* the controller, but the remaining header quadlets
@@ -1487,14 +1487,11 @@ static int handle_ir_packet_per_buffer(struct context *context,
*/
*(u32 *) (ctx->header + i) = __swab32(*(u32 *) (p + 4));
memcpy(ctx->header + i + 4, p + 8, ctx->base.header_size - 4);
- i += ctx->base.header_size;
- p += ctx->base.header_size + 4;
+ ctx->header_length += ctx->base.header_size;
}
- ctx->header_length = i;
-
- if (le16_to_cpu(pd->control) & DESCRIPTOR_IRQ_ALWAYS) {
- ir_header = (__le32 *) (d + z);
+ if (le16_to_cpu(last->control) & DESCRIPTOR_IRQ_ALWAYS) {
+ ir_header = (__le32 *) p;
ctx->base.callback(&ctx->base,
le32_to_cpu(ir_header[0]) & 0xffff,
ctx->header_length, ctx->header,
@@ -1502,7 +1499,6 @@ static int handle_ir_packet_per_buffer(struct context *context,
ctx->header_length = 0;
}
-
return 1;
}
@@ -1853,67 +1849,70 @@ ohci_queue_iso_receive_packet_per_buffer(struct fw_iso_context *base,
{
struct iso_context *ctx = container_of(base, struct iso_context, base);
struct descriptor *d = NULL, *pd = NULL;
- struct fw_iso_packet *p;
+ struct fw_iso_packet *p = packet;
dma_addr_t d_bus, page_bus;
u32 z, header_z, rest;
- int i, page, offset, packet_count, header_size;
-
- if (packet->skip) {
- d = context_get_descriptors(&ctx->context, 1, &d_bus);
- if (d == NULL)
- return -ENOMEM;
-
- d->control = cpu_to_le16(DESCRIPTOR_STATUS |
- DESCRIPTOR_INPUT_LAST |
- DESCRIPTOR_BRANCH_ALWAYS |
- DESCRIPTOR_WAIT);
- context_append(&ctx->context, d, 1, 0);
- }
-
- /* one descriptor for header, one for payload */
- /* FIXME: handle cases where we need multiple desc. for payload */
- z = 2;
- p = packet;
+ int i, j, length;
+ int page, offset, packet_count, header_size, payload_per_buffer;
/*
* The OHCI controller puts the status word in the
* buffer too, so we need 4 extra bytes per packet.
*/
packet_count = p->header_length / ctx->base.header_size;
- header_size = packet_count * (ctx->base.header_size + 4);
+ header_size = ctx->base.header_size + 4;
/* Get header size in number of descriptors. */
header_z = DIV_ROUND_UP(header_size, sizeof(*d));
page = payload >> PAGE_SHIFT;
offset = payload & ~PAGE_MASK;
- rest = p->payload_length;
+ payload_per_buffer = p->payload_length / packet_count;
for (i = 0; i < packet_count; i++) {
/* d points to the header descriptor */
+ z = DIV_ROUND_UP(payload_per_buffer + offset, PAGE_SIZE) + 1;
d = context_get_descriptors(&ctx->context,
- z + header_z, &d_bus);
+ z + header_z, &d_bus);
if (d == NULL)
return -ENOMEM;
- d->control = cpu_to_le16(DESCRIPTOR_INPUT_MORE);
+ d->control = cpu_to_le16(DESCRIPTOR_STATUS |
+ DESCRIPTOR_INPUT_MORE);
+ if (p->skip && i == 0)
+ d->control |= cpu_to_le16(DESCRIPTOR_WAIT);
d->req_count = cpu_to_le16(header_size);
d->res_count = d->req_count;
+ d->transfer_status = 0;
d->data_address = cpu_to_le32(d_bus + (z * sizeof(*d)));
- /* pd points to the payload descriptor */
- pd = d + 1;
+ rest = payload_per_buffer;
+ for (j = 1; j < z; j++) {
+ pd = d + j;
+ pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
+ DESCRIPTOR_INPUT_MORE);
+
+ if (offset + rest < PAGE_SIZE)
+ length = rest;
+ else
+ length = PAGE_SIZE - offset;
+ pd->req_count = cpu_to_le16(length);
+ pd->res_count = pd->req_count;
+ pd->transfer_status = 0;
+
+ page_bus = page_private(buffer->pages[page]);
+ pd->data_address = cpu_to_le32(page_bus + offset);
+
+ offset = (offset + length) & ~PAGE_MASK;
+ rest -= length;
+ if (offset == 0)
+ page++;
+ }
pd->control = cpu_to_le16(DESCRIPTOR_STATUS |
DESCRIPTOR_INPUT_LAST |
DESCRIPTOR_BRANCH_ALWAYS);
- if (p->interrupt)
+ if (p->interrupt && i == packet_count - 1)
pd->control |= cpu_to_le16(DESCRIPTOR_IRQ_ALWAYS);
- pd->req_count = cpu_to_le16(rest);
- pd->res_count = pd->req_count;
-
- page_bus = page_private(buffer->pages[page]);
- pd->data_address = cpu_to_le32(page_bus + offset);
-
context_append(&ctx->context, d, z, header_z);
}