firewire: Fix dualbuffer iso receive mode and drop buffer fill mode.
The dualbuffer DMA setup did not account for the iso trailer word and thus didn't work correctly. With this fixed we can drop the dual buffer fallback mode. Signed-off-by: Kristian Høgsberg <krh@redhat.com> Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>hifive-unleashed-5.1
Kristian Høgsberg
Stefan Richter
parent
d60d7f1d5c
commit
c70dc788fd
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@ -541,20 +541,32 @@ static int ioctl_create_iso_context(struct client *client, void __user *arg)
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if (copy_from_user(&request, arg, sizeof request))
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return -EFAULT;
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if (request.type > FW_ISO_CONTEXT_RECEIVE)
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return -EINVAL;
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if (request.channel > 63)
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return -EINVAL;
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if (request.sync > 15)
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return -EINVAL;
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switch (request.type) {
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case FW_ISO_CONTEXT_RECEIVE:
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if (request.sync > 15)
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return -EINVAL;
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if (request.tags == 0 || request.tags > 15)
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return -EINVAL;
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if (request.tags == 0 || request.tags > 15)
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return -EINVAL;
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if (request.speed > SCODE_3200)
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if (request.header_size < 4 || (request.header_size & 3))
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return -EINVAL;
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break;
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case FW_ISO_CONTEXT_TRANSMIT:
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if (request.speed > SCODE_3200)
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return -EINVAL;
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break;
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default:
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return -EINVAL;
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}
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client->iso_context = fw_iso_context_create(client->device->card,
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request.type,
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@ -1233,24 +1233,6 @@ ohci_get_bus_time(struct fw_card *card)
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return bus_time;
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}
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static int handle_ir_bufferfill_packet(struct context *context,
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struct descriptor *d,
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struct descriptor *last)
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{
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struct iso_context *ctx =
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container_of(context, struct iso_context, context);
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if (d->res_count > 0)
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return 0;
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if (le16_to_cpu(last->control) & descriptor_irq_always)
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ctx->base.callback(&ctx->base,
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le16_to_cpu(last->res_count),
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0, NULL, ctx->base.callback_data);
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return 1;
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}
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static int handle_ir_dualbuffer_packet(struct context *context,
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struct descriptor *d,
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struct descriptor *last)
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@ -1258,19 +1240,33 @@ static int handle_ir_dualbuffer_packet(struct context *context,
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struct iso_context *ctx =
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container_of(context, struct iso_context, context);
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struct db_descriptor *db = (struct db_descriptor *) d;
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__le32 *ir_header;
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size_t header_length;
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void *p, *end;
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int i;
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if (db->first_res_count > 0 && db->second_res_count > 0)
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/* This descriptor isn't done yet, stop iteration. */
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return 0;
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header_length = db->first_req_count - db->first_res_count;
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if (ctx->header_length + header_length <= PAGE_SIZE)
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memcpy(ctx->header + ctx->header_length, db + 1, header_length);
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ctx->header_length += header_length;
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header_length = le16_to_cpu(db->first_req_count) -
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le16_to_cpu(db->first_res_count);
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i = ctx->header_length;
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p = db + 1;
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end = p + header_length;
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while (p < end && i + ctx->base.header_size <= PAGE_SIZE) {
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memcpy(ctx->header + i, p + 4, ctx->base.header_size);
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i += ctx->base.header_size;
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p += ctx->base.header_size + 4;
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}
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ctx->header_length = i;
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if (le16_to_cpu(db->control) & descriptor_irq_always) {
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ctx->base.callback(&ctx->base, 0,
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ir_header = (__le32 *) (db + 1);
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ctx->base.callback(&ctx->base,
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le32_to_cpu(ir_header[0]) & 0xffff,
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ctx->header_length, ctx->header,
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ctx->base.callback_data);
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ctx->header_length = 0;
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@ -1315,12 +1311,10 @@ ohci_allocate_iso_context(struct fw_card *card, int type,
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} else {
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mask = &ohci->ir_context_mask;
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list = ohci->ir_context_list;
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if (header_size > 0)
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callback = handle_ir_dualbuffer_packet;
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else
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callback = handle_ir_bufferfill_packet;
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callback = handle_ir_dualbuffer_packet;
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}
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/* FIXME: We need a fallback for pre 1.1 OHCI. */
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if (callback == handle_ir_dualbuffer_packet &&
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ohci->version < OHCI_VERSION_1_1)
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return ERR_PTR(-EINVAL);
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@ -1367,7 +1361,7 @@ static int ohci_start_iso(struct fw_iso_context *base, s32 cycle)
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{
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struct iso_context *ctx = container_of(base, struct iso_context, base);
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struct fw_ohci *ohci = ctx->context.ohci;
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u32 cycle_match = 0, mode;
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u32 cycle_match = 0;
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int index;
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if (ctx->base.type == FW_ISO_CONTEXT_TRANSMIT) {
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@ -1382,16 +1376,14 @@ static int ohci_start_iso(struct fw_iso_context *base, s32 cycle)
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} else {
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index = ctx - ohci->ir_context_list;
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if (ctx->base.header_size > 0)
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mode = IR_CONTEXT_DUAL_BUFFER_MODE;
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else
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mode = IR_CONTEXT_BUFFER_FILL;
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reg_write(ohci, OHCI1394_IsoRecvIntEventClear, 1 << index);
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reg_write(ohci, OHCI1394_IsoRecvIntMaskSet, 1 << index);
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reg_write(ohci, context_match(ctx->context.regs),
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(ctx->base.tags << 28) |
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(ctx->base.sync << 8) | ctx->base.channel);
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context_run(&ctx->context, mode);
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context_run(&ctx->context,
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IR_CONTEXT_DUAL_BUFFER_MODE |
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IR_CONTEXT_ISOCH_HEADER);
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}
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return 0;
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@ -1537,26 +1529,6 @@ ohci_queue_iso_transmit(struct fw_iso_context *base,
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return 0;
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}
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static int
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setup_wait_descriptor(struct context *ctx)
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{
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struct descriptor *d;
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dma_addr_t d_bus;
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d = context_get_descriptors(ctx, 1, &d_bus);
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if (d == NULL)
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return -ENOMEM;
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d->control = cpu_to_le16(descriptor_input_more |
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descriptor_status |
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descriptor_branch_always |
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descriptor_wait);
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context_append(ctx, d, 1, 0);
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return 0;
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}
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static int
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ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
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struct fw_iso_packet *packet,
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@ -1569,25 +1541,39 @@ ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
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struct fw_iso_packet *p;
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dma_addr_t d_bus, page_bus;
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u32 z, header_z, length, rest;
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int page, offset;
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int page, offset, packet_count, header_size;
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/* FIXME: Cycle lost behavior should be configurable: lose
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* packet, retransmit or terminate.. */
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if (packet->skip && setup_wait_descriptor(&ctx->context) < 0)
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return -ENOMEM;
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if (packet->skip) {
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d = context_get_descriptors(&ctx->context, 2, &d_bus);
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if (d == NULL)
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return -ENOMEM;
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db = (struct db_descriptor *) d;
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db->control = cpu_to_le16(descriptor_status |
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descriptor_branch_always |
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descriptor_wait);
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db->first_size = cpu_to_le16(ctx->base.header_size + 4);
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context_append(&ctx->context, d, 2, 0);
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}
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p = packet;
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z = 2;
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/* The OHCI controller puts the status word in the header
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* buffer too, so we need 4 extra bytes per packet. */
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packet_count = p->header_length / ctx->base.header_size;
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header_size = packet_count * (ctx->base.header_size + 4);
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/* Get header size in number of descriptors. */
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header_z = DIV_ROUND_UP(p->header_length, sizeof *d);
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header_z = DIV_ROUND_UP(header_size, sizeof *d);
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page = payload >> PAGE_SHIFT;
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offset = payload & ~PAGE_MASK;
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rest = p->payload_length;
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/* FIXME: OHCI 1.0 doesn't support dual buffer receive */
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/* FIXME: handle descriptor_wait */
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/* FIXME: make packet-per-buffer/dual-buffer a context option */
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while (rest > 0) {
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d = context_get_descriptors(&ctx->context,
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@ -1598,8 +1584,8 @@ ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
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db = (struct db_descriptor *) d;
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db->control = cpu_to_le16(descriptor_status |
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descriptor_branch_always);
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db->first_size = cpu_to_le16(ctx->base.header_size);
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db->first_req_count = cpu_to_le16(p->header_length);
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db->first_size = cpu_to_le16(ctx->base.header_size + 4);
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db->first_req_count = cpu_to_le16(header_size);
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db->first_res_count = db->first_req_count;
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db->first_buffer = cpu_to_le32(d_bus + sizeof *db);
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@ -1625,57 +1611,6 @@ ohci_queue_iso_receive_dualbuffer(struct fw_iso_context *base,
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return 0;
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}
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static int
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ohci_queue_iso_receive_bufferfill(struct fw_iso_context *base,
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struct fw_iso_packet *packet,
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struct fw_iso_buffer *buffer,
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unsigned long payload)
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{
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struct iso_context *ctx = container_of(base, struct iso_context, base);
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struct descriptor *d = NULL;
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dma_addr_t d_bus, page_bus;
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u32 length, rest;
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int page, offset;
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page = payload >> PAGE_SHIFT;
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offset = payload & ~PAGE_MASK;
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rest = packet->payload_length;
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if (packet->skip && setup_wait_descriptor(&ctx->context) < 0)
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return -ENOMEM;
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while (rest > 0) {
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d = context_get_descriptors(&ctx->context, 1, &d_bus);
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if (d == NULL)
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return -ENOMEM;
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d->control = cpu_to_le16(descriptor_input_more |
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descriptor_status |
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descriptor_branch_always);
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if (offset + rest < PAGE_SIZE)
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length = rest;
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else
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length = PAGE_SIZE - offset;
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page_bus = page_private(buffer->pages[page]);
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d->data_address = cpu_to_le32(page_bus + offset);
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d->req_count = cpu_to_le16(length);
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d->res_count = cpu_to_le16(length);
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if (packet->interrupt && length == rest)
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d->control |= cpu_to_le16(descriptor_irq_always);
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context_append(&ctx->context, d, 1, 0);
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offset = (offset + length) & ~PAGE_MASK;
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rest -= length;
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page++;
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}
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return 0;
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}
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static int
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ohci_queue_iso(struct fw_iso_context *base,
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struct fw_iso_packet *packet,
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@ -1686,9 +1621,6 @@ ohci_queue_iso(struct fw_iso_context *base,
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if (base->type == FW_ISO_CONTEXT_TRANSMIT)
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return ohci_queue_iso_transmit(base, packet, buffer, payload);
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else if (base->header_size == 0)
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return ohci_queue_iso_receive_bufferfill(base, packet,
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buffer, payload);
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else if (ctx->context.ohci->version >= OHCI_VERSION_1_1)
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return ohci_queue_iso_receive_dualbuffer(base, packet,
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buffer, payload);
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