-/* -*- c-basic-offset: 8 -*-
- * fw-spb2.c -- SBP2 driver (SCSI over IEEE1394)
+/*
+ * SBP2 driver (SCSI over IEEE1394)
*
* Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net>
*
* Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
-/* The basic structure of this driver is based the old storage driver,
+/*
+ * The basic structure of this driver is based on the old storage driver,
* drivers/ieee1394/sbp2.c, originally written by
* James Goodwin <jamesg@filanet.com>
* with later contributions and ongoing maintenance from
u32 workarounds;
int login_id;
- /* We cache these addresses and only update them once we've
+ /*
+ * We cache these addresses and only update them once we've
* logged in or reconnected to the sbp2 device. That way, any
* IO to the device will automatically fail and get retried if
* it happens in a window where the device is not ready to
- * handle it (e.g. after a bus reset but before we reconnect). */
+ * handle it (e.g. after a bus reset but before we reconnect).
+ */
int node_id;
int address_high;
int generation;
.model = ~0,
.workarounds = SBP2_WORKAROUND_128K_MAX_TRANS,
},
- /* There are iPods (2nd gen, 3rd gen) with model_id == 0, but
+
+ /*
+ * There are iPods (2nd gen, 3rd gen) with model_id == 0, but
* these iPods do not feature the read_capacity bug according
* to one report. Read_capacity behaviour as well as model_id
- * could change due to Apple-supplied firmware updates though. */
+ * could change due to Apple-supplied firmware updates though.
+ */
+
/* iPod 4th generation. */ {
.firmware_revision = 0x0a2700,
.model = 0x000021,
if (orb == NULL)
return -ENOMEM;
- /* The sbp2 device is going to send a block read request to
- * read out the request from host memory, so map it for
- * dma. */
+ /*
+ * The sbp2 device is going to send a block read request to
+ * read out the request from host memory, so map it for dma.
+ */
orb->base.request_bus =
dma_map_single(device->card->device, &orb->request,
sizeof orb->request, DMA_TO_DEVICE);
orb->request.status_fifo.high = sd->address_handler.offset >> 32;
orb->request.status_fifo.low = sd->address_handler.offset;
- /* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive
+ /*
+ * FIXME: Yeah, ok this isn't elegant, we hardwire exclusive
* login and 1 second reconnect time. The reconnect setting
- * is probably fine, but the exclusive login should be an
- * option. */
+ * is probably fine, but the exclusive login should be an option.
+ */
if (function == SBP2_LOGIN_REQUEST) {
orb->request.misc |=
management_orb_exclusive |
sbp2_send_management_orb(unit, sd->node_id, sd->generation,
SBP2_LOGOUT_REQUEST, sd->login_id,
NULL);
- /* Set this back to sbp2_login so we fall back and
- * retry login on bus reset. */
+ /*
+ * Set this back to sbp2_login so we fall back and
+ * retry login on bus reset.
+ */
PREPARE_DELAYED_WORK(&sd->work, sbp2_login);
}
kref_put(&sd->kref, release_sbp2_device);
return -EBUSY;
}
- /* Scan unit directory to get management agent address,
+ /*
+ * Scan unit directory to get management agent address,
* firmware revison and model. Initialize firmware_revision
- * and model to values that wont match anything in our table. */
+ * and model to values that wont match anything in our table.
+ */
firmware_revision = 0xff000000;
model = 0xff000000;
fw_csr_iterator_init(&ci, unit->directory);
get_device(&unit->device);
- /* We schedule work to do the login so we can easily
+ /*
+ * We schedule work to do the login so we can easily
* reschedule retries. Always get the ref before scheduling
- * work.*/
+ * work.
+ */
INIT_DELAYED_WORK(&sd->work, sbp2_login);
if (schedule_delayed_work(&sd->work, 0))
kref_get(&sd->kref);
result = sbp2_status_to_sense_data(status_get_data(*status),
orb->cmd->sense_buffer);
} else {
- /* If the orb completes with status == NULL, something
+ /*
+ * If the orb completes with status == NULL, something
* went wrong, typically a bus reset happened mid-orb
- * or when sending the write (less likely). */
+ * or when sending the write (less likely).
+ */
result = DID_BUS_BUSY << 16;
}
count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg,
orb->cmd->sc_data_direction);
- /* Handle the special case where there is only one element in
+ /*
+ * Handle the special case where there is only one element in
* the scatter list by converting it to an immediate block
* request. This is also a workaround for broken devices such
* as the second generation iPod which doesn't support page
- * tables. */
+ * tables.
+ */
if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) {
orb->request.data_descriptor.high = sd->address_high;
orb->request.data_descriptor.low = sg_dma_address(sg);
return;
}
- /* Convert the scatterlist to an sbp2 page table. If any
- * scatterlist entries are too big for sbp2 we split the as we go. */
+ /*
+ * Convert the scatterlist to an sbp2 page table. If any
+ * scatterlist entries are too big for sbp2 we split the as we go.
+ */
for (i = 0, j = 0; i < count; i++) {
sg_len = sg_dma_len(sg + i);
sg_addr = sg_dma_address(sg + i);
size = sizeof orb->page_table[0] * j;
- /* The data_descriptor pointer is the one case where we need
+ /*
+ * The data_descriptor pointer is the one case where we need
* to fill in the node ID part of the address. All other
* pointers assume that the data referenced reside on the
* initiator (i.e. us), but data_descriptor can refer to data
- * on other nodes so we need to put our ID in descriptor.high. */
+ * on other nodes so we need to put our ID in descriptor.high.
+ */
orb->page_table_bus =
dma_map_single(device->card->device, orb->page_table,
struct fw_device *device = fw_device(unit->device.parent);
struct sbp2_device *sd = unit->device.driver_data;
- /* As for map_scatterlist, we need to fill in the high bits of
- * the data_descriptor pointer. */
+ /*
+ * As for map_scatterlist, we need to fill in the high bits of
+ * the data_descriptor pointer.
+ */
orb->request_buffer_bus =
dma_map_single(device->card->device,
struct sbp2_device *sd = unit->device.driver_data;
struct sbp2_command_orb *orb;
- /* Bidirectional commands are not yet implemented, and unknown
- * transfer direction not handled. */
+ /*
+ * Bidirectional commands are not yet implemented, and unknown
+ * transfer direction not handled.
+ */
if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) {
fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command");
goto fail_alloc;
orb->request.next.high = SBP2_ORB_NULL;
orb->request.next.low = 0x0;
- /* At speed 100 we can do 512 bytes per packet, at speed 200,
+ /*
+ * At speed 100 we can do 512 bytes per packet, at speed 200,
* 1024 bytes per packet etc. The SBP-2 max_payload field
* specifies the max payload size as 2 ^ (max_payload + 2), so
- * if we set this to max_speed + 7, we get the right value. */
+ * if we set this to max_speed + 7, we get the right value.
+ */
orb->request.misc =
command_orb_max_payload(device->node->max_speed + 7) |
command_orb_speed(device->node->max_speed) |
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
+ /*
+ * 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? */
+ * reporting our max supported block size?
+ */
fw_error("command > 64k\n");
goto fail_bufflen;
} else if (cmd->request_bufflen > 0) {
projects / deliverable / linux.git / blobdiff