struct sbp2_pointer page_table[SG_ALL];
dma_addr_t page_table_bus;
- dma_addr_t request_buffer_bus;
};
/*
unsigned long flags;
if (tcode != TCODE_WRITE_BLOCK_REQUEST ||
- length == 0 || length > sizeof status) {
+ length == 0 || length > sizeof(status)) {
fw_send_response(card, request, RCODE_TYPE_ERROR);
return;
}
orb->pointer.high = 0;
orb->pointer.low = orb->request_bus;
- fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof orb->pointer);
+ fw_memcpy_to_be32(&orb->pointer, &orb->pointer, sizeof(orb->pointer));
spin_lock_irqsave(&device->card->lock, flags);
list_add_tail(&orb->link, &sd->orb_list);
fw_send_request(device->card, &orb->t, TCODE_WRITE_BLOCK_REQUEST,
node_id, generation,
device->node->max_speed, offset,
- &orb->pointer, sizeof orb->pointer,
+ &orb->pointer, sizeof(orb->pointer),
complete_transaction, orb);
}
(struct sbp2_management_orb *)base_orb;
if (status)
- memcpy(&orb->status, status, sizeof *status);
+ memcpy(&orb->status, status, sizeof(*status));
complete(&orb->done);
}
struct sbp2_management_orb *orb;
int retval = -ENOMEM;
- orb = kzalloc(sizeof *orb, GFP_ATOMIC);
+ orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
if (orb == NULL)
return -ENOMEM;
*/
orb->base.request_bus =
dma_map_single(device->card->device, &orb->request,
- sizeof orb->request, DMA_TO_DEVICE);
+ sizeof(orb->request), DMA_TO_DEVICE);
if (dma_mapping_error(orb->base.request_bus))
goto out;
orb->response_bus =
dma_map_single(device->card->device, &orb->response,
- sizeof orb->response, DMA_FROM_DEVICE);
+ sizeof(orb->response), DMA_FROM_DEVICE);
if (dma_mapping_error(orb->response_bus))
goto out;
MANAGEMENT_ORB_FUNCTION(function) |
MANAGEMENT_ORB_LUN(lun);
orb->request.length =
- MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof orb->response);
+ MANAGEMENT_ORB_RESPONSE_LENGTH(sizeof(orb->response));
orb->request.status_fifo.high = sd->address_handler.offset >> 32;
orb->request.status_fifo.low = sd->address_handler.offset;
MANAGEMENT_ORB_RECONNECT(0);
}
- fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request);
+ fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
init_completion(&orb->done);
orb->base.callback = complete_management_orb;
retval = 0;
out:
dma_unmap_single(device->card->device, orb->base.request_bus,
- sizeof orb->request, DMA_TO_DEVICE);
+ sizeof(orb->request), DMA_TO_DEVICE);
dma_unmap_single(device->card->device, orb->response_bus,
- sizeof orb->response, DMA_FROM_DEVICE);
+ sizeof(orb->response), DMA_FROM_DEVICE);
if (response)
fw_memcpy_from_be32(response,
- orb->response, sizeof orb->response);
+ orb->response, sizeof(orb->response));
kfree(orb);
return retval;
struct fw_transaction *t;
static u32 zero;
- t = kzalloc(sizeof *t, GFP_ATOMIC);
+ t = kzalloc(sizeof(*t), GFP_ATOMIC);
if (t == NULL)
return -ENOMEM;
fw_send_request(device->card, t, TCODE_WRITE_QUADLET_REQUEST,
sd->node_id, sd->generation, SCODE_400,
sd->command_block_agent_address + SBP2_AGENT_RESET,
- &zero, sizeof zero, complete_agent_reset_write, t);
+ &zero, sizeof(zero), complete_agent_reset_write, t);
return 0;
}
}
dma_unmap_single(device->card->device, orb->base.request_bus,
- sizeof orb->request, DMA_TO_DEVICE);
+ sizeof(orb->request), DMA_TO_DEVICE);
if (orb->cmd->use_sg > 0) {
sg = (struct scatterlist *)orb->cmd->request_buffer;
if (orb->page_table_bus != 0)
dma_unmap_single(device->card->device, orb->page_table_bus,
- sizeof orb->page_table_bus, DMA_TO_DEVICE);
-
- if (orb->request_buffer_bus != 0)
- dma_unmap_single(device->card->device, orb->request_buffer_bus,
- sizeof orb->request_buffer_bus,
- DMA_FROM_DEVICE);
+ sizeof(orb->page_table_bus), DMA_TO_DEVICE);
orb->cmd->result = result;
orb->done(orb->cmd);
kfree(orb);
}
-static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
+static int sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb)
{
struct sbp2_device *sd =
(struct sbp2_device *)orb->cmd->device->host->hostdata;
sg = (struct scatterlist *)orb->cmd->request_buffer;
count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg,
orb->cmd->sc_data_direction);
+ if (count == 0)
+ goto fail;
/*
* Handle the special case where there is only one element in
orb->request.data_descriptor.low = sg_dma_address(sg);
orb->request.misc |=
COMMAND_ORB_DATA_SIZE(sg_dma_len(sg));
- return;
+ return 0;
}
/*
* Convert the scatterlist to an sbp2 page table. If any
- * scatterlist entries are too big for sbp2 we split the as we go.
+ * scatterlist entries are too big for sbp2, we split them as we
+ * go. Even if we ask the block I/O layer to not give us sg
+ * elements larger than 65535 bytes, some IOMMUs may merge sg elements
+ * during DMA mapping, and Linux currently doesn't prevent this.
*/
for (i = 0, j = 0; i < count; i++) {
sg_len = sg_dma_len(sg + i);
}
}
- size = sizeof orb->page_table[0] * j;
+ size = sizeof(orb->page_table[0]) * j;
/*
* The data_descriptor pointer is the one case where we need
orb->page_table_bus =
dma_map_single(device->card->device, orb->page_table,
size, DMA_TO_DEVICE);
+ if (dma_mapping_error(orb->page_table_bus))
+ goto fail_page_table;
orb->request.data_descriptor.high = sd->address_high;
orb->request.data_descriptor.low = orb->page_table_bus;
orb->request.misc |=
COMMAND_ORB_DATA_SIZE(j);
fw_memcpy_to_be32(orb->page_table, orb->page_table, size);
-}
-static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb)
-{
- struct sbp2_device *sd =
- (struct sbp2_device *)orb->cmd->device->host->hostdata;
- struct fw_unit *unit = sd->unit;
- struct fw_device *device = fw_device(unit->device.parent);
-
- /*
- * As for map_scatterlist, we need to fill in the high bits of
- * the data_descriptor pointer.
- */
+ return 0;
- orb->request_buffer_bus =
- dma_map_single(device->card->device,
- orb->cmd->request_buffer,
- orb->cmd->request_bufflen,
- orb->cmd->sc_data_direction);
- orb->request.data_descriptor.high = sd->address_high;
- orb->request.data_descriptor.low = orb->request_buffer_bus;
- orb->request.misc |=
- COMMAND_ORB_DATA_SIZE(orb->cmd->request_bufflen);
+ fail_page_table:
+ dma_unmap_sg(device->card->device, sg, orb->cmd->use_sg,
+ orb->cmd->sc_data_direction);
+ fail:
+ return -ENOMEM;
}
/* SCSI stack integration */
* transfer direction not handled.
*/
if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
- fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
- goto fail_alloc;
+ fw_error("Can't handle DMA_BIDIRECTIONAL, rejecting command\n");
+ cmd->result = DID_ERROR << 16;
+ done(cmd);
+ return 0;
}
- orb = kzalloc(sizeof *orb, GFP_ATOMIC);
+ orb = kzalloc(sizeof(*orb), GFP_ATOMIC);
if (orb == NULL) {
fw_notify("failed to alloc orb\n");
goto fail_alloc;
orb->base.rcode = -1;
orb->base.request_bus =
dma_map_single(device->card->device, &orb->request,
- sizeof orb->request, DMA_TO_DEVICE);
+ sizeof(orb->request), DMA_TO_DEVICE);
if (dma_mapping_error(orb->base.request_bus))
goto fail_mapping;
orb->request.misc |=
COMMAND_ORB_DIRECTION(SBP2_DIRECTION_TO_MEDIA);
- if (cmd->use_sg) {
- sbp2_command_orb_map_scatterlist(orb);
- } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) {
- /*
- * FIXME: Need to split this into a sg list... but
- * could we get the scsi or blk layer to do that by
- * reporting our max supported block size?
- */
- fw_error("command > 64k\n");
- goto fail_bufflen;
- } else if (cmd->request_bufflen > 0) {
- sbp2_command_orb_map_buffer(orb);
- }
+ if (cmd->use_sg && sbp2_command_orb_map_scatterlist(orb) < 0)
+ goto fail_map_payload;
- fw_memcpy_to_be32(&orb->request, &orb->request, sizeof orb->request);
+ fw_memcpy_to_be32(&orb->request, &orb->request, sizeof(orb->request));
memset(orb->request.command_block,
- 0, sizeof orb->request.command_block);
+ 0, sizeof(orb->request.command_block));
memcpy(orb->request.command_block, cmd->cmnd, COMMAND_SIZE(*cmd->cmnd));
orb->base.callback = complete_command_orb;
return 0;
- fail_bufflen:
+ fail_map_payload:
dma_unmap_single(device->card->device, orb->base.request_bus,
- sizeof orb->request, DMA_TO_DEVICE);
+ sizeof(orb->request), DMA_TO_DEVICE);
fail_mapping:
kfree(orb);
fail_alloc:
- cmd->result = DID_ERROR << 16;
- done(cmd);
- return 0;
+ return SCSI_MLQUEUE_HOST_BUSY;
}
static int sbp2_scsi_slave_alloc(struct scsi_device *sdev)
return SUCCESS;
}
+/*
+ * Format of /sys/bus/scsi/devices/.../ieee1394_id:
+ * u64 EUI-64 : u24 directory_ID : u16 LUN (all printed in hexadecimal)
+ *
+ * This is the concatenation of target port identifier and logical unit
+ * identifier as per SAM-2...SAM-4 annex A.
+ */
+static ssize_t
+sbp2_sysfs_ieee1394_id_show(struct device *dev, struct device_attribute *attr,
+ char *buf)
+{
+ struct scsi_device *sdev = to_scsi_device(dev);
+ struct sbp2_device *sd;
+ struct fw_unit *unit;
+ struct fw_device *device;
+ u32 directory_id;
+ struct fw_csr_iterator ci;
+ int key, value, lun;
+
+ if (!sdev)
+ return 0;
+ sd = (struct sbp2_device *)sdev->host->hostdata;
+ unit = sd->unit;
+ device = fw_device(unit->device.parent);
+
+ /* implicit directory ID */
+ directory_id = ((unit->directory - device->config_rom) * 4
+ + CSR_CONFIG_ROM) & 0xffffff;
+
+ /* explicit directory ID, overrides implicit ID if present */
+ fw_csr_iterator_init(&ci, unit->directory);
+ while (fw_csr_iterator_next(&ci, &key, &value))
+ if (key == CSR_DIRECTORY_ID) {
+ directory_id = value;
+ break;
+ }
+
+ /* FIXME: Make this work for multi-lun devices. */
+ lun = 0;
+
+ return sprintf(buf, "%08x%08x:%06x:%04x\n",
+ device->config_rom[3], device->config_rom[4],
+ directory_id, lun);
+}
+
+static DEVICE_ATTR(ieee1394_id, S_IRUGO, sbp2_sysfs_ieee1394_id_show, NULL);
+
+static struct device_attribute *sbp2_scsi_sysfs_attrs[] = {
+ &dev_attr_ieee1394_id,
+ NULL
+};
+
static struct scsi_host_template scsi_driver_template = {
.module = THIS_MODULE,
.name = "SBP-2 IEEE-1394",
.use_clustering = ENABLE_CLUSTERING,
.cmd_per_lun = 1,
.can_queue = 1,
+ .sdev_attrs = sbp2_scsi_sysfs_attrs,
};
MODULE_AUTHOR("Kristian Hoegsberg <krh@bitplanet.net>");
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff