Re: 2.6.20-rc2: kernel BUG at include/asm/dma-mapping.h:110!
From: Stefan Richter
Date: Fri Dec 29 2006 - 17:48:03 EST
Benjamin Herrenschmidt wrote:
>> Bisecting has identified this commit:
>>
>> commit 9b7d9c096dd4e4baacc21b2588662bbb56f36c4e
>> Author: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
>> Date: Wed Nov 22 21:44:34 2006 +0100
>>
>> ieee1394: sbp2: convert from PCI DMA to generic DMA
>>
>> API conversion without change in functionality
>>
>> Signed-off-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
>>
>>
>> I'm only seeing this on ppc64, ppc32 seems to be working fine.
>
> The patch looks totally bogus to me. It's passing a random struct device
> from the hbsp host data structure to the dma_map_* routines. which they
> can't do anything about.
[...]
> So if you are to pass a struct device pointer to dma_map_*, use the one
> inside the pci_dev of the host. Or have the host driver provide you with
> the struct device pointer (which is the one from the pci_dev * for PCI
> implementations, and others give you what they are on, assuming the
> platform can do dma-* on that device).
[...]
The parent device of my bogus fw-host device should do the trick. Alas I
can't test on ppc64 or with anything else than ohci1394 driven
controllers...
From: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
Subject: ieee1394: sbp2: fix bogus dma mapping
Need to use a PCI device, not a FireWire host device. Problem found by
Andreas Schwab, mistake pointed out by Benjamin Herrenschmidt.
http://ozlabs.org/pipermail/linuxppc-dev/2006-December/029595.html
Signed-off-by: Stefan Richter <stefanr@xxxxxxxxxxxxxxxxx>
---
drivers/ieee1394/sbp2.c | 73 +++++++++++++++++++++-------------------
1 file changed, 40 insertions(+), 33 deletions(-)
Index: linux-2.6.20-rc2/drivers/ieee1394/sbp2.c
===================================================================
--- linux-2.6.20-rc2.orig/drivers/ieee1394/sbp2.c
+++ linux-2.6.20-rc2/drivers/ieee1394/sbp2.c
@@ -490,11 +490,11 @@ static int sbp2util_create_command_orb_p
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
return -ENOMEM;
}
- cmd->command_orb_dma = dma_map_single(&hi->host->device,
+ cmd->command_orb_dma = dma_map_single(hi->host->device.parent,
&cmd->command_orb,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
- cmd->sge_dma = dma_map_single(&hi->host->device,
+ cmd->sge_dma = dma_map_single(hi->host->device.parent,
&cmd->scatter_gather_element,
sizeof(cmd->scatter_gather_element),
DMA_BIDIRECTIONAL);
@@ -516,10 +516,11 @@ static void sbp2util_remove_command_orb_
if (!list_empty(&lu->cmd_orb_completed))
list_for_each_safe(lh, next, &lu->cmd_orb_completed) {
cmd = list_entry(lh, struct sbp2_command_info, list);
- dma_unmap_single(&host->device, cmd->command_orb_dma,
+ dma_unmap_single(host->device.parent,
+ cmd->command_orb_dma,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
- dma_unmap_single(&host->device, cmd->sge_dma,
+ dma_unmap_single(host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
DMA_BIDIRECTIONAL);
kfree(cmd);
@@ -601,17 +602,17 @@ static void sbp2util_mark_command_comple
if (cmd->cmd_dma) {
if (cmd->dma_type == CMD_DMA_SINGLE)
- dma_unmap_single(&host->device, cmd->cmd_dma,
+ dma_unmap_single(host->device.parent, cmd->cmd_dma,
cmd->dma_size, cmd->dma_dir);
else if (cmd->dma_type == CMD_DMA_PAGE)
- dma_unmap_page(&host->device, cmd->cmd_dma,
+ dma_unmap_page(host->device.parent, cmd->cmd_dma,
cmd->dma_size, cmd->dma_dir);
/* XXX: Check for CMD_DMA_NONE bug */
cmd->dma_type = CMD_DMA_NONE;
cmd->cmd_dma = 0;
}
if (cmd->sge_buffer) {
- dma_unmap_sg(&host->device, cmd->sge_buffer,
+ dma_unmap_sg(host->device.parent, cmd->sge_buffer,
cmd->dma_size, cmd->dma_dir);
cmd->sge_buffer = NULL;
}
@@ -836,37 +837,37 @@ static int sbp2_start_device(struct sbp2
struct sbp2_fwhost_info *hi = lu->hi;
int error;
- lu->login_response = dma_alloc_coherent(&hi->host->device,
+ lu->login_response = dma_alloc_coherent(hi->host->device.parent,
sizeof(struct sbp2_login_response),
&lu->login_response_dma, GFP_KERNEL);
if (!lu->login_response)
goto alloc_fail;
- lu->query_logins_orb = dma_alloc_coherent(&hi->host->device,
+ lu->query_logins_orb = dma_alloc_coherent(hi->host->device.parent,
sizeof(struct sbp2_query_logins_orb),
&lu->query_logins_orb_dma, GFP_KERNEL);
if (!lu->query_logins_orb)
goto alloc_fail;
- lu->query_logins_response = dma_alloc_coherent(&hi->host->device,
+ lu->query_logins_response = dma_alloc_coherent(hi->host->device.parent,
sizeof(struct sbp2_query_logins_response),
&lu->query_logins_response_dma, GFP_KERNEL);
if (!lu->query_logins_response)
goto alloc_fail;
- lu->reconnect_orb = dma_alloc_coherent(&hi->host->device,
+ lu->reconnect_orb = dma_alloc_coherent(hi->host->device.parent,
sizeof(struct sbp2_reconnect_orb),
&lu->reconnect_orb_dma, GFP_KERNEL);
if (!lu->reconnect_orb)
goto alloc_fail;
- lu->logout_orb = dma_alloc_coherent(&hi->host->device,
+ lu->logout_orb = dma_alloc_coherent(hi->host->device.parent,
sizeof(struct sbp2_logout_orb),
&lu->logout_orb_dma, GFP_KERNEL);
if (!lu->logout_orb)
goto alloc_fail;
- lu->login_orb = dma_alloc_coherent(&hi->host->device,
+ lu->login_orb = dma_alloc_coherent(hi->host->device.parent,
sizeof(struct sbp2_login_orb),
&lu->login_orb_dma, GFP_KERNEL);
if (!lu->login_orb)
@@ -929,32 +930,32 @@ static void sbp2_remove_device(struct sb
list_del(&lu->lu_list);
if (lu->login_response)
- dma_free_coherent(&hi->host->device,
+ dma_free_coherent(hi->host->device.parent,
sizeof(struct sbp2_login_response),
lu->login_response,
lu->login_response_dma);
if (lu->login_orb)
- dma_free_coherent(&hi->host->device,
+ dma_free_coherent(hi->host->device.parent,
sizeof(struct sbp2_login_orb),
lu->login_orb,
lu->login_orb_dma);
if (lu->reconnect_orb)
- dma_free_coherent(&hi->host->device,
+ dma_free_coherent(hi->host->device.parent,
sizeof(struct sbp2_reconnect_orb),
lu->reconnect_orb,
lu->reconnect_orb_dma);
if (lu->logout_orb)
- dma_free_coherent(&hi->host->device,
+ dma_free_coherent(hi->host->device.parent,
sizeof(struct sbp2_logout_orb),
lu->logout_orb,
lu->logout_orb_dma);
if (lu->query_logins_orb)
- dma_free_coherent(&hi->host->device,
+ dma_free_coherent(hi->host->device.parent,
sizeof(struct sbp2_query_logins_orb),
lu->query_logins_orb,
lu->query_logins_orb_dma);
if (lu->query_logins_response)
- dma_free_coherent(&hi->host->device,
+ dma_free_coherent(hi->host->device.parent,
sizeof(struct sbp2_query_logins_response),
lu->query_logins_response,
lu->query_logins_response_dma);
@@ -1445,7 +1446,7 @@ static void sbp2_prep_command_orb_sg(str
cmd->dma_size = sgpnt[0].length;
cmd->dma_type = CMD_DMA_PAGE;
- cmd->cmd_dma = dma_map_page(&hi->host->device,
+ cmd->cmd_dma = dma_map_page(hi->host->device.parent,
sgpnt[0].page, sgpnt[0].offset,
cmd->dma_size, cmd->dma_dir);
@@ -1457,8 +1458,8 @@ static void sbp2_prep_command_orb_sg(str
&cmd->scatter_gather_element[0];
u32 sg_count, sg_len;
dma_addr_t sg_addr;
- int i, count = dma_map_sg(&hi->host->device, sgpnt, scsi_use_sg,
- dma_dir);
+ int i, count = dma_map_sg(hi->host->device.parent, sgpnt,
+ scsi_use_sg, dma_dir);
cmd->dma_size = scsi_use_sg;
cmd->sge_buffer = sgpnt;
@@ -1508,7 +1509,8 @@ static void sbp2_prep_command_orb_no_sg(
cmd->dma_dir = dma_dir;
cmd->dma_size = scsi_request_bufflen;
cmd->dma_type = CMD_DMA_SINGLE;
- cmd->cmd_dma = dma_map_single(&hi->host->device, scsi_request_buffer,
+ cmd->cmd_dma = dma_map_single(hi->host->device.parent,
+ scsi_request_buffer,
cmd->dma_size, cmd->dma_dir);
orb->data_descriptor_hi = ORB_SET_NODE_ID(hi->host->node_id);
orb->misc |= ORB_SET_DIRECTION(orb_direction);
@@ -1626,10 +1628,11 @@ static void sbp2_link_orb_command(struct
size_t length;
unsigned long flags;
- dma_sync_single_for_device(&hi->host->device, cmd->command_orb_dma,
+ dma_sync_single_for_device(hi->host->device.parent,
+ cmd->command_orb_dma,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
- dma_sync_single_for_device(&hi->host->device, cmd->sge_dma,
+ dma_sync_single_for_device(hi->host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
DMA_BIDIRECTIONAL);
@@ -1655,14 +1658,15 @@ static void sbp2_link_orb_command(struct
* The target's fetch agent may or may not have read this
* previous ORB yet.
*/
- dma_sync_single_for_cpu(&hi->host->device, last_orb_dma,
+ dma_sync_single_for_cpu(hi->host->device.parent, last_orb_dma,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
last_orb->next_ORB_lo = cpu_to_be32(cmd->command_orb_dma);
wmb();
/* Tells hardware that this pointer is valid */
last_orb->next_ORB_hi = 0;
- dma_sync_single_for_device(&hi->host->device, last_orb_dma,
+ dma_sync_single_for_device(hi->host->device.parent,
+ last_orb_dma,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
addr += SBP2_DOORBELL_OFFSET;
@@ -1790,10 +1794,11 @@ static int sbp2_handle_status_write(stru
else
cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
if (cmd) {
- dma_sync_single_for_cpu(&hi->host->device, cmd->command_orb_dma,
+ dma_sync_single_for_cpu(hi->host->device.parent,
+ cmd->command_orb_dma,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
- dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
+ dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
DMA_BIDIRECTIONAL);
/* Grab SCSI command pointers and check status. */
@@ -1931,10 +1936,11 @@ static void sbp2scsi_complete_all_comman
while (!list_empty(&lu->cmd_orb_inuse)) {
lh = lu->cmd_orb_inuse.next;
cmd = list_entry(lh, struct sbp2_command_info, list);
- dma_sync_single_for_cpu(&hi->host->device, cmd->command_orb_dma,
+ dma_sync_single_for_cpu(hi->host->device.parent,
+ cmd->command_orb_dma,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
- dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
+ dma_sync_single_for_cpu(hi->host->device.parent, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
DMA_BIDIRECTIONAL);
sbp2util_mark_command_completed(lu, cmd);
@@ -2059,11 +2065,12 @@ static int sbp2scsi_abort(struct scsi_cm
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
cmd = sbp2util_find_command_for_SCpnt(lu, SCpnt);
if (cmd) {
- dma_sync_single_for_cpu(&hi->host->device,
+ dma_sync_single_for_cpu(hi->host->device.parent,
cmd->command_orb_dma,
sizeof(struct sbp2_command_orb),
DMA_TO_DEVICE);
- dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
+ dma_sync_single_for_cpu(hi->host->device.parent,
+ cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
DMA_BIDIRECTIONAL);
sbp2util_mark_command_completed(lu, cmd);
--
Stefan Richter
-=====-=-==- ==-- ===-=
http://arcgraph.de/sr/
-
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