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path: root/drivers/scsi/gdth.c
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Diffstat (limited to 'drivers/scsi/gdth.c')
-rw-r--r--drivers/scsi/gdth.c111
1 files changed, 77 insertions, 34 deletions
diff --git a/drivers/scsi/gdth.c b/drivers/scsi/gdth.c
index 4248b041c9b5..e002c391e0d2 100644
--- a/drivers/scsi/gdth.c
+++ b/drivers/scsi/gdth.c
@@ -86,8 +86,8 @@
/* The meaning of the Scsi_Pointer members in this driver is as follows:
* ptr: Chaining
* this_residual: Command priority
- * buffer: phys. DMA sense buffer
- * dma_handle: phys. DMA buffer (kernel >= 2.4.0)
+ * buffer: unused
+ * dma_handle: will drop in !use_sg patch.
* buffers_residual: Timeout value
* Status: Command status (gdth_do_cmd()), DMA mem. mappings
* Message: Additional info (gdth_do_cmd()), DMA direction
@@ -184,6 +184,8 @@ static int gdth_ioctl(struct inode *inode, struct file *filep,
static void gdth_flush(gdth_ha_str *ha);
static int gdth_halt(struct notifier_block *nb, ulong event, void *buf);
static int gdth_queuecommand(Scsi_Cmnd *scp,void (*done)(Scsi_Cmnd *));
+static int __gdth_queuecommand(gdth_ha_str *ha, struct scsi_cmnd *scp,
+ struct gdth_cmndinfo *cmndinfo);
static void gdth_scsi_done(struct scsi_cmnd *scp);
#ifdef DEBUG_GDTH
@@ -371,9 +373,6 @@ static const struct file_operations gdth_fops = {
.release = gdth_close,
};
-#define GDTH_MAGIC 0xc2e7c389 /* I got it from /dev/urandom */
-#define IS_GDTH_INTERNAL_CMD(scp) (scp->underflow == GDTH_MAGIC)
-
#include "gdth_proc.h"
#include "gdth_proc.c"
@@ -394,6 +393,34 @@ static gdth_ha_str *gdth_find_ha(int hanum)
return NULL;
}
+static struct gdth_cmndinfo *gdth_get_cmndinfo(gdth_ha_str *ha)
+{
+ struct gdth_cmndinfo *priv = NULL;
+ ulong flags;
+ int i;
+
+ spin_lock_irqsave(&ha->smp_lock, flags);
+
+ for (i=0; i<GDTH_MAXCMDS; ++i) {
+ if (ha->cmndinfo[i].index == 0) {
+ priv = &ha->cmndinfo[i];
+ priv->index = i+1;
+ memset(priv, 0, sizeof(*priv));
+ break;
+ }
+ }
+
+ spin_unlock_irqrestore(&ha->smp_lock, flags);
+
+ return priv;
+}
+
+static void gdth_put_cmndinfo(struct gdth_cmndinfo *priv)
+{
+ BUG_ON(!priv);
+ priv->index = 0;
+}
+
static void gdth_delay(int milliseconds)
{
if (milliseconds == 0) {
@@ -405,9 +432,15 @@ static void gdth_delay(int milliseconds)
static void gdth_scsi_done(struct scsi_cmnd *scp)
{
+ struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
+ int internal_command = cmndinfo->internal_command;
+
TRACE2(("gdth_scsi_done()\n"));
- if (IS_GDTH_INTERNAL_CMD(scp))
+ gdth_put_cmndinfo(cmndinfo);
+ scp->host_scribble = NULL;
+
+ if (internal_command)
complete((struct completion *)scp->request);
else
scp->scsi_done(scp);
@@ -416,7 +449,9 @@ static void gdth_scsi_done(struct scsi_cmnd *scp)
int __gdth_execute(struct scsi_device *sdev, gdth_cmd_str *gdtcmd, char *cmnd,
int timeout, u32 *info)
{
+ gdth_ha_str *ha = shost_priv(sdev->host);
Scsi_Cmnd *scp;
+ struct gdth_cmndinfo cmndinfo;
DECLARE_COMPLETION_ONSTACK(wait);
int rval;
@@ -425,6 +460,8 @@ int __gdth_execute(struct scsi_device *sdev, gdth_cmd_str *gdtcmd, char *cmnd,
return -ENOMEM;
scp->device = sdev;
+ memset(&cmndinfo, 0, sizeof(cmndinfo));
+
/* use request field to save the ptr. to completion struct. */
scp->request = (struct request *)&wait;
scp->timeout_per_command = timeout*HZ;
@@ -432,8 +469,11 @@ int __gdth_execute(struct scsi_device *sdev, gdth_cmd_str *gdtcmd, char *cmnd,
scp->cmd_len = 12;
memcpy(scp->cmnd, cmnd, 12);
scp->SCp.this_residual = IOCTL_PRI; /* priority */
- scp->underflow = GDTH_MAGIC;
- gdth_queuecommand(scp, NULL);
+ cmndinfo.internal_command = 1;
+
+ TRACE(("__gdth_execute() cmd 0x%x\n", scp->cmnd[0]));
+ __gdth_queuecommand(ha, scp, &cmndinfo);
+
wait_for_completion(&wait);
rval = scp->SCp.Status;
@@ -1966,6 +2006,7 @@ static int gdth_analyse_hdrive(gdth_ha_str *ha, ushort hdrive)
static void gdth_putq(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar priority)
{
+ struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
register Scsi_Cmnd *pscp;
register Scsi_Cmnd *nscp;
ulong flags;
@@ -1974,7 +2015,7 @@ static void gdth_putq(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar priority)
TRACE(("gdth_putq() priority %d\n",priority));
spin_lock_irqsave(&ha->smp_lock, flags);
- if (!IS_GDTH_INTERNAL_CMD(scp)) {
+ if (!cmndinfo->internal_command) {
scp->SCp.this_residual = (int)priority;
b = scp->device->channel;
t = scp->device->id;
@@ -2035,7 +2076,7 @@ static void gdth_next(gdth_ha_str *ha)
for (nscp = pscp = ha->req_first; nscp; nscp = (Scsi_Cmnd *)nscp->SCp.ptr) {
if (nscp != pscp && nscp != (Scsi_Cmnd *)pscp->SCp.ptr)
pscp = (Scsi_Cmnd *)pscp->SCp.ptr;
- if (!IS_GDTH_INTERNAL_CMD(nscp)) {
+ if (!gdth_cmnd_priv(nscp)->internal_command) {
b = nscp->device->channel;
t = nscp->device->id;
l = nscp->device->lun;
@@ -2060,7 +2101,7 @@ static void gdth_next(gdth_ha_str *ha)
firsttime = FALSE;
}
- if (!IS_GDTH_INTERNAL_CMD(nscp)) {
+ if (!gdth_cmnd_priv(nscp)->internal_command) {
if (nscp->SCp.phase == -1) {
nscp->SCp.phase = CACHESERVICE; /* default: cache svc. */
if (nscp->cmnd[0] == TEST_UNIT_READY) {
@@ -2123,7 +2164,7 @@ static void gdth_next(gdth_ha_str *ha)
else
gdth_scsi_done(nscp);
}
- } else if (IS_GDTH_INTERNAL_CMD(nscp)) {
+ } else if (gdth_cmnd_priv(nscp)->internal_command) {
if (!(cmd_index=gdth_special_cmd(ha, nscp)))
this_cmd = FALSE;
next_cmd = FALSE;
@@ -2622,6 +2663,7 @@ static int gdth_fill_raw_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar b)
unchar t,l;
struct page *page;
ulong offset;
+ struct gdth_cmndinfo *cmndinfo;
t = scp->device->id;
l = scp->device->lun;
@@ -2645,6 +2687,7 @@ static int gdth_fill_raw_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar b)
if (ha->cmd_cnt == 0)
gdth_set_sema0(ha);
+ cmndinfo = gdth_cmnd_priv(scp);
/* fill command */
if (scp->SCp.sent_command != -1) {
cmdp->OpCode = scp->SCp.sent_command; /* special raw cmd. */
@@ -2668,9 +2711,8 @@ static int gdth_fill_raw_cmd(gdth_ha_str *ha, Scsi_Cmnd *scp, unchar b)
offset = (ulong)scp->sense_buffer & ~PAGE_MASK;
sense_paddr = pci_map_page(ha->pdev,page,offset,
16,PCI_DMA_FROMDEVICE);
- *(ulong32 *)&scp->SCp.buffer = (ulong32)sense_paddr;
- /* high part, if 64bit */
- *(ulong32 *)&scp->host_scribble = (ulong32)((ulong64)sense_paddr >> 32);
+
+ cmndinfo->sense_paddr = sense_paddr;
cmdp->OpCode = GDT_WRITE; /* always */
cmdp->BoardNode = LOCALBOARD;
if (mode64) {
@@ -3271,6 +3313,7 @@ static int gdth_sync_event(gdth_ha_str *ha, int service, unchar index,
gdth_msg_str *msg;
gdth_cmd_str *cmdp;
unchar b, t;
+ struct gdth_cmndinfo *cmndinfo = gdth_cmnd_priv(scp);
cmdp = ha->pccb;
TRACE(("gdth_sync_event() serv %d status %d\n",
@@ -3364,14 +3407,9 @@ static int gdth_sync_event(gdth_ha_str *ha, int service, unchar index,
else if (scp->SCp.Status == GDTH_MAP_SINGLE)
pci_unmap_page(ha->pdev,scp->SCp.dma_handle,
scp->request_bufflen,scp->SCp.Message);
- if (scp->SCp.buffer) {
- dma_addr_t addr;
- addr = (dma_addr_t)*(ulong32 *)&scp->SCp.buffer;
- if (scp->host_scribble)
- addr += (dma_addr_t)
- ((ulong64)(*(ulong32 *)&scp->host_scribble) << 32);
- pci_unmap_page(ha->pdev,addr,16,PCI_DMA_FROMDEVICE);
- }
+ if (cmndinfo->sense_paddr)
+ pci_unmap_page(ha->pdev, cmndinfo->sense_paddr, 16,
+ PCI_DMA_FROMDEVICE);
if (ha->status == S_OK) {
scp->SCp.Status = S_OK;
@@ -3450,7 +3488,7 @@ static int gdth_sync_event(gdth_ha_str *ha, int service, unchar index,
scp->sense_buffer[2] = NOT_READY;
scp->result = (DID_OK << 16) | (CHECK_CONDITION << 1);
}
- if (!IS_GDTH_INTERNAL_CMD(scp)) {
+ if (!cmndinfo->internal_command) {
ha->dvr.size = sizeof(ha->dvr.eu.sync);
ha->dvr.eu.sync.ionode = ha->hanum;
ha->dvr.eu.sync.service = service;
@@ -3995,28 +4033,33 @@ static int gdth_queuecommand(struct scsi_cmnd *scp,
void (*done)(struct scsi_cmnd *))
{
gdth_ha_str *ha = shost_priv(scp->device->host);
- int priority;
+ struct gdth_cmndinfo *cmndinfo;
TRACE(("gdth_queuecommand() cmd 0x%x\n", scp->cmnd[0]));
-
+
+ cmndinfo = gdth_get_cmndinfo(ha);
+ BUG_ON(!cmndinfo);
+
scp->scsi_done = done;
+ gdth_update_timeout(scp, scp->timeout_per_command * 6);
+ scp->SCp.this_residual = DEFAULT_PRI;
+ return __gdth_queuecommand(ha, scp, cmndinfo);
+}
+
+static int __gdth_queuecommand(gdth_ha_str *ha, struct scsi_cmnd *scp,
+ struct gdth_cmndinfo *cmndinfo)
+{
+ scp->host_scribble = (unsigned char *)cmndinfo;
scp->SCp.have_data_in = 1;
scp->SCp.phase = -1;
scp->SCp.sent_command = -1;
scp->SCp.Status = GDTH_MAP_NONE;
- scp->SCp.buffer = (struct scatterlist *)NULL;
#ifdef GDTH_STATISTICS
++act_ios;
#endif
- priority = DEFAULT_PRI;
- if (IS_GDTH_INTERNAL_CMD(scp))
- priority = scp->SCp.this_residual;
- else
- gdth_update_timeout(scp, scp->timeout_per_command * 6);
-
- gdth_putq(ha, scp, priority);
+ gdth_putq(ha, scp, scp->SCp.this_residual);
gdth_next(ha);
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-23 01:03:09 +0000