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Subject[PATCH] ieee1394: sbp2: convert from PCI DMA to generic DMA
ieee1394: sbp2: convert from PCI DMA to generic DMA

API conversion without change in functionality

Signed-off-by: Stefan Richter <stefanr@s5r6.in-berlin.de>
---

Todo:
- Collaps all management ORB DMAs into one block.
They can probably even be compressed into a union.
- Use streaming DMA instead of coherent DMA for ORB DMAs.
- Take a target's Unit_Characteristics.ORB_size into account.
- Collaps the command ORB DMAs into one block.
- Convert ieee1394 from PCI DMA to generic DMA too,
thus elimiate its dependency on CONFIG_PCI.


drivers/ieee1394/Kconfig | 2
drivers/ieee1394/sbp2.c | 126 ++++++++++++++++++---------------------
drivers/ieee1394/sbp2.h | 2
3 files changed, 62 insertions(+), 68 deletions(-)

Index: linux/drivers/ieee1394/Kconfig
===================================================================
--- linux.orig/drivers/ieee1394/Kconfig 2006-11-13 21:07:39.000000000 +0100
+++ linux/drivers/ieee1394/Kconfig 2006-11-13 21:12:12.000000000 +0100
@@ -120,7 +120,7 @@ comment "SBP-2 support (for storage devi

config IEEE1394_SBP2
tristate "SBP-2 support (Harddisks etc.)"
- depends on IEEE1394 && SCSI && (PCI || BROKEN)
+ depends on IEEE1394 && SCSI
help
This option enables you to use SBP-2 devices connected to an IEEE
1394 bus. SBP-2 devices include storage devices like harddisks and
Index: linux/drivers/ieee1394/sbp2.c
===================================================================
--- linux.orig/drivers/ieee1394/sbp2.c 2006-11-13 21:11:06.000000000 +0100
+++ linux/drivers/ieee1394/sbp2.c 2006-11-13 21:12:12.000000000 +0100
@@ -48,7 +48,6 @@
* - make the parameter serialize_io configurable per device
* - move all requests to fetch agent registers into non-atomic context,
* replace all usages of sbp2util_node_write_no_wait by true transactions
- * - convert to generic DMA mapping API to eliminate dependency on PCI
* Grep for inline FIXME comments below.
*/

@@ -63,7 +62,6 @@
#include <linux/list.h>
#include <linux/module.h>
#include <linux/moduleparam.h>
-#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/stat.h>
@@ -492,14 +490,14 @@ static int sbp2util_create_command_orb_p
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
return -ENOMEM;
}
- cmd->command_orb_dma = pci_map_single(hi->host->pdev,
+ cmd->command_orb_dma = dma_map_single(&hi->host->device,
&cmd->command_orb,
sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
- cmd->sge_dma = pci_map_single(hi->host->pdev,
+ DMA_TO_DEVICE);
+ cmd->sge_dma = dma_map_single(&hi->host->device,
&cmd->scatter_gather_element,
sizeof(cmd->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
+ DMA_BIDIRECTIONAL);
INIT_LIST_HEAD(&cmd->list);
list_add_tail(&cmd->list, &lu->cmd_orb_completed);
}
@@ -518,12 +516,12 @@ 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);
- pci_unmap_single(host->pdev, cmd->command_orb_dma,
+ dma_unmap_single(&host->device, cmd->command_orb_dma,
sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
- pci_unmap_single(host->pdev, cmd->sge_dma,
+ DMA_TO_DEVICE);
+ dma_unmap_single(&host->device, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
+ DMA_BIDIRECTIONAL);
kfree(cmd);
}
spin_unlock_irqrestore(&lu->cmd_orb_lock, flags);
@@ -603,17 +601,17 @@ static void sbp2util_mark_command_comple

if (cmd->cmd_dma) {
if (cmd->dma_type == CMD_DMA_SINGLE)
- pci_unmap_single(host->pdev, cmd->cmd_dma,
+ dma_unmap_single(&host->device, cmd->cmd_dma,
cmd->dma_size, cmd->dma_dir);
else if (cmd->dma_type == CMD_DMA_PAGE)
- pci_unmap_page(host->pdev, cmd->cmd_dma,
+ dma_unmap_page(&host->device, 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) {
- pci_unmap_sg(host->pdev, cmd->sge_buffer,
+ dma_unmap_sg(&host->device, cmd->sge_buffer,
cmd->dma_size, cmd->dma_dir);
cmd->sge_buffer = NULL;
}
@@ -838,39 +836,39 @@ static int sbp2_start_device(struct sbp2
struct sbp2_fwhost_info *hi = lu->hi;
int error;

- lu->login_response = pci_alloc_consistent(hi->host->pdev,
+ lu->login_response = dma_alloc_coherent(&hi->host->device,
sizeof(struct sbp2_login_response),
- &lu->login_response_dma);
+ &lu->login_response_dma, GFP_KERNEL);
if (!lu->login_response)
goto alloc_fail;

- lu->query_logins_orb = pci_alloc_consistent(hi->host->pdev,
+ lu->query_logins_orb = dma_alloc_coherent(&hi->host->device,
sizeof(struct sbp2_query_logins_orb),
- &lu->query_logins_orb_dma);
+ &lu->query_logins_orb_dma, GFP_KERNEL);
if (!lu->query_logins_orb)
goto alloc_fail;

- lu->query_logins_response = pci_alloc_consistent(hi->host->pdev,
+ lu->query_logins_response = dma_alloc_coherent(&hi->host->device,
sizeof(struct sbp2_query_logins_response),
- &lu->query_logins_response_dma);
+ &lu->query_logins_response_dma, GFP_KERNEL);
if (!lu->query_logins_response)
goto alloc_fail;

- lu->reconnect_orb = pci_alloc_consistent(hi->host->pdev,
+ lu->reconnect_orb = dma_alloc_coherent(&hi->host->device,
sizeof(struct sbp2_reconnect_orb),
- &lu->reconnect_orb_dma);
+ &lu->reconnect_orb_dma, GFP_KERNEL);
if (!lu->reconnect_orb)
goto alloc_fail;

- lu->logout_orb = pci_alloc_consistent(hi->host->pdev,
+ lu->logout_orb = dma_alloc_coherent(&hi->host->device,
sizeof(struct sbp2_logout_orb),
- &lu->logout_orb_dma);
+ &lu->logout_orb_dma, GFP_KERNEL);
if (!lu->logout_orb)
goto alloc_fail;

- lu->login_orb = pci_alloc_consistent(hi->host->pdev,
+ lu->login_orb = dma_alloc_coherent(&hi->host->device,
sizeof(struct sbp2_login_orb),
- &lu->login_orb_dma);
+ &lu->login_orb_dma, GFP_KERNEL);
if (!lu->login_orb)
goto alloc_fail;

@@ -931,32 +929,32 @@ static void sbp2_remove_device(struct sb
list_del(&lu->lu_list);

if (lu->login_response)
- pci_free_consistent(hi->host->pdev,
+ dma_free_coherent(&hi->host->device,
sizeof(struct sbp2_login_response),
lu->login_response,
lu->login_response_dma);
if (lu->login_orb)
- pci_free_consistent(hi->host->pdev,
+ dma_free_coherent(&hi->host->device,
sizeof(struct sbp2_login_orb),
lu->login_orb,
lu->login_orb_dma);
if (lu->reconnect_orb)
- pci_free_consistent(hi->host->pdev,
+ dma_free_coherent(&hi->host->device,
sizeof(struct sbp2_reconnect_orb),
lu->reconnect_orb,
lu->reconnect_orb_dma);
if (lu->logout_orb)
- pci_free_consistent(hi->host->pdev,
+ dma_free_coherent(&hi->host->device,
sizeof(struct sbp2_logout_orb),
lu->logout_orb,
lu->logout_orb_dma);
if (lu->query_logins_orb)
- pci_free_consistent(hi->host->pdev,
+ dma_free_coherent(&hi->host->device,
sizeof(struct sbp2_query_logins_orb),
lu->query_logins_orb,
lu->query_logins_orb_dma);
if (lu->query_logins_response)
- pci_free_consistent(hi->host->pdev,
+ dma_free_coherent(&hi->host->device,
sizeof(struct sbp2_query_logins_response),
lu->query_logins_response,
lu->query_logins_response_dma);
@@ -1447,7 +1445,7 @@ static void sbp2_prep_command_orb_sg(str

cmd->dma_size = sgpnt[0].length;
cmd->dma_type = CMD_DMA_PAGE;
- cmd->cmd_dma = pci_map_page(hi->host->pdev,
+ cmd->cmd_dma = dma_map_page(&hi->host->device,
sgpnt[0].page, sgpnt[0].offset,
cmd->dma_size, cmd->dma_dir);

@@ -1459,7 +1457,7 @@ 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 = pci_map_sg(hi->host->pdev, sgpnt, scsi_use_sg,
+ int i, count = dma_map_sg(&hi->host->device, sgpnt, scsi_use_sg,
dma_dir);

cmd->dma_size = scsi_use_sg;
@@ -1510,7 +1508,7 @@ 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 = pci_map_single(hi->host->pdev, scsi_request_buffer,
+ cmd->cmd_dma = dma_map_single(&hi->host->device, 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);
@@ -1628,12 +1626,12 @@ static void sbp2_link_orb_command(struct
size_t length;
unsigned long flags;

- pci_dma_sync_single_for_device(hi->host->pdev, cmd->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
- pci_dma_sync_single_for_device(hi->host->pdev, cmd->sge_dma,
- sizeof(cmd->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
+ dma_sync_single_for_device(&hi->host->device, cmd->command_orb_dma,
+ sizeof(struct sbp2_command_orb),
+ DMA_TO_DEVICE);
+ dma_sync_single_for_device(&hi->host->device, cmd->sge_dma,
+ sizeof(cmd->scatter_gather_element),
+ DMA_BIDIRECTIONAL);

/* check to see if there are any previous orbs to use */
spin_lock_irqsave(&lu->cmd_orb_lock, flags);
@@ -1657,16 +1655,16 @@ static void sbp2_link_orb_command(struct
* The target's fetch agent may or may not have read this
* previous ORB yet.
*/
- pci_dma_sync_single_for_cpu(hi->host->pdev, last_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
+ dma_sync_single_for_cpu(&hi->host->device, 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;
- pci_dma_sync_single_for_device(hi->host->pdev, last_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
+ dma_sync_single_for_device(&hi->host->device, last_orb_dma,
+ sizeof(struct sbp2_command_orb),
+ DMA_TO_DEVICE);
addr += SBP2_DOORBELL_OFFSET;
data[0] = 0;
length = 4;
@@ -1793,14 +1791,12 @@ static int sbp2_handle_status_write(stru
else
cmd = sbp2util_find_command_for_orb(lu, sb->ORB_offset_lo);
if (cmd) {
- pci_dma_sync_single_for_cpu(hi->host->pdev,
- cmd->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
- pci_dma_sync_single_for_cpu(hi->host->pdev,
- cmd->sge_dma,
- sizeof(cmd->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
+ dma_sync_single_for_cpu(&hi->host->device, cmd->command_orb_dma,
+ sizeof(struct sbp2_command_orb),
+ DMA_TO_DEVICE);
+ dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
+ sizeof(cmd->scatter_gather_element),
+ DMA_BIDIRECTIONAL);
/* Grab SCSI command pointers and check status. */
/*
* FIXME: If the src field in the status is 1, the ORB DMA must
@@ -1936,13 +1932,12 @@ 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);
- pci_dma_sync_single_for_cpu(hi->host->pdev,
- cmd->command_orb_dma,
- sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
- pci_dma_sync_single_for_cpu(hi->host->pdev, cmd->sge_dma,
- sizeof(cmd->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
+ dma_sync_single_for_cpu(&hi->host->device, cmd->command_orb_dma,
+ sizeof(struct sbp2_command_orb),
+ DMA_TO_DEVICE);
+ dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
+ sizeof(cmd->scatter_gather_element),
+ DMA_BIDIRECTIONAL);
sbp2util_mark_command_completed(lu, cmd);
if (cmd->Current_SCpnt) {
cmd->Current_SCpnt->result = status << 16;
@@ -2065,14 +2060,13 @@ 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) {
- pci_dma_sync_single_for_cpu(hi->host->pdev,
+ dma_sync_single_for_cpu(&hi->host->device,
cmd->command_orb_dma,
sizeof(struct sbp2_command_orb),
- PCI_DMA_TODEVICE);
- pci_dma_sync_single_for_cpu(hi->host->pdev,
- cmd->sge_dma,
+ DMA_TO_DEVICE);
+ dma_sync_single_for_cpu(&hi->host->device, cmd->sge_dma,
sizeof(cmd->scatter_gather_element),
- PCI_DMA_BIDIRECTIONAL);
+ DMA_BIDIRECTIONAL);
sbp2util_mark_command_completed(lu, cmd);
if (cmd->Current_SCpnt) {
cmd->Current_SCpnt->result = DID_ABORT << 16;
Index: linux/drivers/ieee1394/sbp2.h
===================================================================
--- linux.orig/drivers/ieee1394/sbp2.h 2006-11-13 21:07:39.000000000 +0100
+++ linux/drivers/ieee1394/sbp2.h 2006-11-13 21:12:12.000000000 +0100
@@ -263,7 +263,7 @@ struct sbp2_command_info {
dma_addr_t cmd_dma;
enum sbp2_dma_types dma_type;
unsigned long dma_size;
- int dma_dir;
+ enum dma_data_direction dma_dir;
};

/* Per FireWire host */
--
Stefan Richter
-=====-=-==- =-== =-==-
http://arcgraph.de/sr/
-
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