diff options
author | Kristian Høgsberg <krh@redhat.com> | 2007-05-07 20:33:32 -0400 |
---|---|---|
committer | Stefan Richter <stefanr@s5r6.in-berlin.de> | 2007-05-10 12:24:13 -0400 |
commit | c781c06d119d04601727f2fbc30151e6760d536d (patch) | |
tree | 1faf19acc6bc2a2a3b3bdae8368e395e75cd7518 /drivers/firewire/fw-sbp2.c | |
parent | e175569c4639872b5cf242c9d4a71cc40c5f3c29 (diff) |
firewire: Clean up comment style.
Drop filenames from file preamble, drop editor annotations and
use standard indent style for block comments.
Signed-off-by: Kristian Hoegsberg <krh@redhat.com>
Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de> (fixed typo)
Diffstat (limited to 'drivers/firewire/fw-sbp2.c')
-rw-r--r-- | drivers/firewire/fw-sbp2.c | 101 |
1 files changed, 66 insertions, 35 deletions
diff --git a/drivers/firewire/fw-sbp2.c b/drivers/firewire/fw-sbp2.c index 7ce9b811431..eb3bddb162e 100644 --- a/drivers/firewire/fw-sbp2.c +++ b/drivers/firewire/fw-sbp2.c | |||
@@ -1,5 +1,5 @@ | |||
1 | /* -*- c-basic-offset: 8 -*- | 1 | /* |
2 | * fw-spb2.c -- SBP2 driver (SCSI over IEEE1394) | 2 | * SBP2 driver (SCSI over IEEE1394) |
3 | * | 3 | * |
4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> | 4 | * Copyright (C) 2005-2007 Kristian Hoegsberg <krh@bitplanet.net> |
5 | * | 5 | * |
@@ -18,7 +18,8 @@ | |||
18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | 18 | * Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
19 | */ | 19 | */ |
20 | 20 | ||
21 | /* The basic structure of this driver is based the old storage driver, | 21 | /* |
22 | * The basic structure of this driver is based on the old storage driver, | ||
22 | * drivers/ieee1394/sbp2.c, originally written by | 23 | * drivers/ieee1394/sbp2.c, originally written by |
23 | * James Goodwin <jamesg@filanet.com> | 24 | * James Goodwin <jamesg@filanet.com> |
24 | * with later contributions and ongoing maintenance from | 25 | * with later contributions and ongoing maintenance from |
@@ -60,11 +61,13 @@ struct sbp2_device { | |||
60 | u32 workarounds; | 61 | u32 workarounds; |
61 | int login_id; | 62 | int login_id; |
62 | 63 | ||
63 | /* We cache these addresses and only update them once we've | 64 | /* |
65 | * We cache these addresses and only update them once we've | ||
64 | * logged in or reconnected to the sbp2 device. That way, any | 66 | * logged in or reconnected to the sbp2 device. That way, any |
65 | * IO to the device will automatically fail and get retried if | 67 | * IO to the device will automatically fail and get retried if |
66 | * it happens in a window where the device is not ready to | 68 | * it happens in a window where the device is not ready to |
67 | * handle it (e.g. after a bus reset but before we reconnect). */ | 69 | * handle it (e.g. after a bus reset but before we reconnect). |
70 | */ | ||
68 | int node_id; | 71 | int node_id; |
69 | int address_high; | 72 | int address_high; |
70 | int generation; | 73 | int generation; |
@@ -239,10 +242,14 @@ static const struct { | |||
239 | .model = ~0, | 242 | .model = ~0, |
240 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, | 243 | .workarounds = SBP2_WORKAROUND_128K_MAX_TRANS, |
241 | }, | 244 | }, |
242 | /* There are iPods (2nd gen, 3rd gen) with model_id == 0, but | 245 | |
246 | /* | ||
247 | * There are iPods (2nd gen, 3rd gen) with model_id == 0, but | ||
243 | * these iPods do not feature the read_capacity bug according | 248 | * these iPods do not feature the read_capacity bug according |
244 | * to one report. Read_capacity behaviour as well as model_id | 249 | * to one report. Read_capacity behaviour as well as model_id |
245 | * could change due to Apple-supplied firmware updates though. */ | 250 | * could change due to Apple-supplied firmware updates though. |
251 | */ | ||
252 | |||
246 | /* iPod 4th generation. */ { | 253 | /* iPod 4th generation. */ { |
247 | .firmware_revision = 0x0a2700, | 254 | .firmware_revision = 0x0a2700, |
248 | .model = 0x000021, | 255 | .model = 0x000021, |
@@ -398,9 +405,10 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |||
398 | if (orb == NULL) | 405 | if (orb == NULL) |
399 | return -ENOMEM; | 406 | return -ENOMEM; |
400 | 407 | ||
401 | /* The sbp2 device is going to send a block read request to | 408 | /* |
402 | * read out the request from host memory, so map it for | 409 | * The sbp2 device is going to send a block read request to |
403 | * dma. */ | 410 | * read out the request from host memory, so map it for dma. |
411 | */ | ||
404 | orb->base.request_bus = | 412 | orb->base.request_bus = |
405 | dma_map_single(device->card->device, &orb->request, | 413 | dma_map_single(device->card->device, &orb->request, |
406 | sizeof orb->request, DMA_TO_DEVICE); | 414 | sizeof orb->request, DMA_TO_DEVICE); |
@@ -426,10 +434,11 @@ sbp2_send_management_orb(struct fw_unit *unit, int node_id, int generation, | |||
426 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; | 434 | orb->request.status_fifo.high = sd->address_handler.offset >> 32; |
427 | orb->request.status_fifo.low = sd->address_handler.offset; | 435 | orb->request.status_fifo.low = sd->address_handler.offset; |
428 | 436 | ||
429 | /* FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | 437 | /* |
438 | * FIXME: Yeah, ok this isn't elegant, we hardwire exclusive | ||
430 | * login and 1 second reconnect time. The reconnect setting | 439 | * login and 1 second reconnect time. The reconnect setting |
431 | * is probably fine, but the exclusive login should be an | 440 | * is probably fine, but the exclusive login should be an option. |
432 | * option. */ | 441 | */ |
433 | if (function == SBP2_LOGIN_REQUEST) { | 442 | if (function == SBP2_LOGIN_REQUEST) { |
434 | orb->request.misc |= | 443 | orb->request.misc |= |
435 | management_orb_exclusive | | 444 | management_orb_exclusive | |
@@ -592,8 +601,10 @@ static void sbp2_login(struct work_struct *work) | |||
592 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, | 601 | sbp2_send_management_orb(unit, sd->node_id, sd->generation, |
593 | SBP2_LOGOUT_REQUEST, sd->login_id, | 602 | SBP2_LOGOUT_REQUEST, sd->login_id, |
594 | NULL); | 603 | NULL); |
595 | /* Set this back to sbp2_login so we fall back and | 604 | /* |
596 | * retry login on bus reset. */ | 605 | * Set this back to sbp2_login so we fall back and |
606 | * retry login on bus reset. | ||
607 | */ | ||
597 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); | 608 | PREPARE_DELAYED_WORK(&sd->work, sbp2_login); |
598 | } | 609 | } |
599 | kref_put(&sd->kref, release_sbp2_device); | 610 | kref_put(&sd->kref, release_sbp2_device); |
@@ -633,9 +644,11 @@ static int sbp2_probe(struct device *dev) | |||
633 | return -EBUSY; | 644 | return -EBUSY; |
634 | } | 645 | } |
635 | 646 | ||
636 | /* Scan unit directory to get management agent address, | 647 | /* |
648 | * Scan unit directory to get management agent address, | ||
637 | * firmware revison and model. Initialize firmware_revision | 649 | * firmware revison and model. Initialize firmware_revision |
638 | * and model to values that wont match anything in our table. */ | 650 | * and model to values that wont match anything in our table. |
651 | */ | ||
639 | firmware_revision = 0xff000000; | 652 | firmware_revision = 0xff000000; |
640 | model = 0xff000000; | 653 | model = 0xff000000; |
641 | fw_csr_iterator_init(&ci, unit->directory); | 654 | fw_csr_iterator_init(&ci, unit->directory); |
@@ -673,9 +686,11 @@ static int sbp2_probe(struct device *dev) | |||
673 | 686 | ||
674 | get_device(&unit->device); | 687 | get_device(&unit->device); |
675 | 688 | ||
676 | /* We schedule work to do the login so we can easily | 689 | /* |
690 | * We schedule work to do the login so we can easily | ||
677 | * reschedule retries. Always get the ref before scheduling | 691 | * reschedule retries. Always get the ref before scheduling |
678 | * work.*/ | 692 | * work. |
693 | */ | ||
679 | INIT_DELAYED_WORK(&sd->work, sbp2_login); | 694 | INIT_DELAYED_WORK(&sd->work, sbp2_login); |
680 | if (schedule_delayed_work(&sd->work, 0)) | 695 | if (schedule_delayed_work(&sd->work, 0)) |
681 | kref_get(&sd->kref); | 696 | kref_get(&sd->kref); |
@@ -834,9 +849,11 @@ complete_command_orb(struct sbp2_orb *base_orb, struct sbp2_status *status) | |||
834 | result = sbp2_status_to_sense_data(status_get_data(*status), | 849 | result = sbp2_status_to_sense_data(status_get_data(*status), |
835 | orb->cmd->sense_buffer); | 850 | orb->cmd->sense_buffer); |
836 | } else { | 851 | } else { |
837 | /* If the orb completes with status == NULL, something | 852 | /* |
853 | * If the orb completes with status == NULL, something | ||
838 | * went wrong, typically a bus reset happened mid-orb | 854 | * went wrong, typically a bus reset happened mid-orb |
839 | * or when sending the write (less likely). */ | 855 | * or when sending the write (less likely). |
856 | */ | ||
840 | result = DID_BUS_BUSY << 16; | 857 | result = DID_BUS_BUSY << 16; |
841 | } | 858 | } |
842 | 859 | ||
@@ -878,11 +895,13 @@ static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) | |||
878 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, | 895 | count = dma_map_sg(device->card->device, sg, orb->cmd->use_sg, |
879 | orb->cmd->sc_data_direction); | 896 | orb->cmd->sc_data_direction); |
880 | 897 | ||
881 | /* Handle the special case where there is only one element in | 898 | /* |
899 | * Handle the special case where there is only one element in | ||
882 | * the scatter list by converting it to an immediate block | 900 | * the scatter list by converting it to an immediate block |
883 | * request. This is also a workaround for broken devices such | 901 | * request. This is also a workaround for broken devices such |
884 | * as the second generation iPod which doesn't support page | 902 | * as the second generation iPod which doesn't support page |
885 | * tables. */ | 903 | * tables. |
904 | */ | ||
886 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { | 905 | if (count == 1 && sg_dma_len(sg) < SBP2_MAX_SG_ELEMENT_LENGTH) { |
887 | orb->request.data_descriptor.high = sd->address_high; | 906 | orb->request.data_descriptor.high = sd->address_high; |
888 | orb->request.data_descriptor.low = sg_dma_address(sg); | 907 | orb->request.data_descriptor.low = sg_dma_address(sg); |
@@ -891,8 +910,10 @@ static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) | |||
891 | return; | 910 | return; |
892 | } | 911 | } |
893 | 912 | ||
894 | /* Convert the scatterlist to an sbp2 page table. If any | 913 | /* |
895 | * scatterlist entries are too big for sbp2 we split the as we go. */ | 914 | * Convert the scatterlist to an sbp2 page table. If any |
915 | * scatterlist entries are too big for sbp2 we split the as we go. | ||
916 | */ | ||
896 | for (i = 0, j = 0; i < count; i++) { | 917 | for (i = 0, j = 0; i < count; i++) { |
897 | sg_len = sg_dma_len(sg + i); | 918 | sg_len = sg_dma_len(sg + i); |
898 | sg_addr = sg_dma_address(sg + i); | 919 | sg_addr = sg_dma_address(sg + i); |
@@ -908,11 +929,13 @@ static void sbp2_command_orb_map_scatterlist(struct sbp2_command_orb *orb) | |||
908 | 929 | ||
909 | size = sizeof orb->page_table[0] * j; | 930 | size = sizeof orb->page_table[0] * j; |
910 | 931 | ||
911 | /* The data_descriptor pointer is the one case where we need | 932 | /* |
933 | * The data_descriptor pointer is the one case where we need | ||
912 | * to fill in the node ID part of the address. All other | 934 | * to fill in the node ID part of the address. All other |
913 | * pointers assume that the data referenced reside on the | 935 | * pointers assume that the data referenced reside on the |
914 | * initiator (i.e. us), but data_descriptor can refer to data | 936 | * initiator (i.e. us), but data_descriptor can refer to data |
915 | * on other nodes so we need to put our ID in descriptor.high. */ | 937 | * on other nodes so we need to put our ID in descriptor.high. |
938 | */ | ||
916 | 939 | ||
917 | orb->page_table_bus = | 940 | orb->page_table_bus = |
918 | dma_map_single(device->card->device, orb->page_table, | 941 | dma_map_single(device->card->device, orb->page_table, |
@@ -933,8 +956,10 @@ static void sbp2_command_orb_map_buffer(struct sbp2_command_orb *orb) | |||
933 | struct fw_device *device = fw_device(unit->device.parent); | 956 | struct fw_device *device = fw_device(unit->device.parent); |
934 | struct sbp2_device *sd = unit->device.driver_data; | 957 | struct sbp2_device *sd = unit->device.driver_data; |
935 | 958 | ||
936 | /* As for map_scatterlist, we need to fill in the high bits of | 959 | /* |
937 | * the data_descriptor pointer. */ | 960 | * As for map_scatterlist, we need to fill in the high bits of |
961 | * the data_descriptor pointer. | ||
962 | */ | ||
938 | 963 | ||
939 | orb->request_buffer_bus = | 964 | orb->request_buffer_bus = |
940 | dma_map_single(device->card->device, | 965 | dma_map_single(device->card->device, |
@@ -956,8 +981,10 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |||
956 | struct sbp2_device *sd = unit->device.driver_data; | 981 | struct sbp2_device *sd = unit->device.driver_data; |
957 | struct sbp2_command_orb *orb; | 982 | struct sbp2_command_orb *orb; |
958 | 983 | ||
959 | /* Bidirectional commands are not yet implemented, and unknown | 984 | /* |
960 | * transfer direction not handled. */ | 985 | * Bidirectional commands are not yet implemented, and unknown |
986 | * transfer direction not handled. | ||
987 | */ | ||
961 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { | 988 | if (cmd->sc_data_direction == DMA_BIDIRECTIONAL) { |
962 | fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); | 989 | fw_error("Cannot handle DMA_BIDIRECTIONAL - rejecting command"); |
963 | goto fail_alloc; | 990 | goto fail_alloc; |
@@ -983,10 +1010,12 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |||
983 | 1010 | ||
984 | orb->request.next.high = SBP2_ORB_NULL; | 1011 | orb->request.next.high = SBP2_ORB_NULL; |
985 | orb->request.next.low = 0x0; | 1012 | orb->request.next.low = 0x0; |
986 | /* At speed 100 we can do 512 bytes per packet, at speed 200, | 1013 | /* |
1014 | * At speed 100 we can do 512 bytes per packet, at speed 200, | ||
987 | * 1024 bytes per packet etc. The SBP-2 max_payload field | 1015 | * 1024 bytes per packet etc. The SBP-2 max_payload field |
988 | * specifies the max payload size as 2 ^ (max_payload + 2), so | 1016 | * specifies the max payload size as 2 ^ (max_payload + 2), so |
989 | * if we set this to max_speed + 7, we get the right value. */ | 1017 | * if we set this to max_speed + 7, we get the right value. |
1018 | */ | ||
990 | orb->request.misc = | 1019 | orb->request.misc = |
991 | command_orb_max_payload(device->node->max_speed + 7) | | 1020 | command_orb_max_payload(device->node->max_speed + 7) | |
992 | command_orb_speed(device->node->max_speed) | | 1021 | command_orb_speed(device->node->max_speed) | |
@@ -1002,9 +1031,11 @@ static int sbp2_scsi_queuecommand(struct scsi_cmnd *cmd, scsi_done_fn_t done) | |||
1002 | if (cmd->use_sg) { | 1031 | if (cmd->use_sg) { |
1003 | sbp2_command_orb_map_scatterlist(orb); | 1032 | sbp2_command_orb_map_scatterlist(orb); |
1004 | } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) { | 1033 | } else if (cmd->request_bufflen > SBP2_MAX_SG_ELEMENT_LENGTH) { |
1005 | /* FIXME: Need to split this into a sg list... but | 1034 | /* |
1035 | * FIXME: Need to split this into a sg list... but | ||
1006 | * could we get the scsi or blk layer to do that by | 1036 | * could we get the scsi or blk layer to do that by |
1007 | * reporting our max supported block size? */ | 1037 | * reporting our max supported block size? |
1038 | */ | ||
1008 | fw_error("command > 64k\n"); | 1039 | fw_error("command > 64k\n"); |
1009 | goto fail_bufflen; | 1040 | goto fail_bufflen; |
1010 | } else if (cmd->request_bufflen > 0) { | 1041 | } else if (cmd->request_bufflen > 0) { |