[PATCH] [7/21] SCSI-ISA-DMA: Remove unchecked_isa_dma in gdth | |
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- Audited ->cmnd use and it always copies
- Allocate hostdata separately with GFP_DMA for the ISA case
- Tell scsi layer to bounce sense_buffer for ISA case
- Tell block layer to bounce for isa case
- Remove unchecked_isa_dma
Untested due to lack of hardware
Signed-off-by: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andi Kleen <andi@xxxxxxxxxxxxxx>
Signed-off-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
---
drivers/scsi/gdth.c | 81 +++++++++++++++++++++++++++++++++++++++-------------
1 file changed, 62 insertions(+), 19 deletions(-)
Index: linux/drivers/scsi/gdth.c
===================================================================
--- linux.orig/drivers/scsi/gdth.c
+++ linux/drivers/scsi/gdth.c
@@ -139,6 +139,15 @@
#include <scsi/scsi_host.h>
#include "gdth.h"
+
+struct host_ptr {
+ gdth_ha_str *host_ptr;
+ dma_addr_t dma;
+};
+
+#define gdth_shost_priv(host) (((struct host_ptr *)shost_priv(host))->host_ptr)
+#define gdth_shost_dma(host) (((struct host_ptr *)shost_priv(host))->dma)
+
static void gdth_delay(int milliseconds);
static void gdth_eval_mapping(ulong32 size, ulong32 *cyls, int *heads, int *secs);
static irqreturn_t gdth_interrupt(int irq, void *dev_id);
@@ -443,7 +452,7 @@ static void gdth_scsi_done(struct scsi_c
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);
+ gdth_ha_str *ha = gdth_shost_priv(sdev->host);
Scsi_Cmnd *scp;
struct gdth_cmndinfo cmndinfo;
DECLARE_COMPLETION_ONSTACK(wait);
@@ -3893,7 +3902,7 @@ static const char *gdth_ctr_name(gdth_ha
static const char *gdth_info(struct Scsi_Host *shp)
{
- gdth_ha_str *ha = shost_priv(shp);
+ gdth_ha_str *ha = gdth_shost_priv(shp);
TRACE2(("gdth_info()\n"));
return ((const char *)ha->binfo.type_string);
@@ -3901,7 +3910,7 @@ static const char *gdth_info(struct Scsi
static int gdth_eh_bus_reset(Scsi_Cmnd *scp)
{
- gdth_ha_str *ha = shost_priv(scp->device->host);
+ gdth_ha_str *ha = gdth_shost_priv(scp->device->host);
int i;
ulong flags;
Scsi_Cmnd *cmnd;
@@ -3954,7 +3963,7 @@ static int gdth_eh_bus_reset(Scsi_Cmnd *
static int gdth_bios_param(struct scsi_device *sdev,struct block_device *bdev,sector_t cap,int *ip)
{
unchar b, t;
- gdth_ha_str *ha = shost_priv(sdev->host);
+ gdth_ha_str *ha = gdth_shost_priv(sdev->host);
struct scsi_device *sd;
unsigned capacity;
@@ -3983,7 +3992,7 @@ static int gdth_bios_param(struct scsi_d
static int gdth_queuecommand(struct scsi_cmnd *scp,
void (*done)(struct scsi_cmnd *))
{
- gdth_ha_str *ha = shost_priv(scp->device->host);
+ gdth_ha_str *ha = gdth_shost_priv(scp->device->host);
struct gdth_cmndinfo *cmndinfo;
TRACE(("gdth_queuecommand() cmd 0x%x\n", scp->cmnd[0]));
@@ -4636,6 +4645,13 @@ static int gdth_slave_configure(struct s
return 0;
}
+static int gdth_adjust_queue(struct scsi_device *device)
+{
+ if (device->host->sense_buffer_isa)
+ blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_ISA);
+ return 0;
+}
+
static struct scsi_host_template gdth_template = {
.name = "GDT SCSI Disk Array Controller",
.info = gdth_info,
@@ -4649,10 +4665,38 @@ static struct scsi_host_template gdth_te
.this_id = -1,
.sg_tablesize = GDTH_MAXSG,
.cmd_per_lun = GDTH_MAXC_P_L,
- .unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
+ .slave_alloc = gdth_adjust_queue,
};
+static struct Scsi_Host *gdth_host_alloc(struct device *dev)
+{
+ struct Scsi_Host *shost;
+ gdth_ha_str *board;
+ shost = scsi_host_alloc(&gdth_template, sizeof(struct host_ptr));
+ if (!shost)
+ return NULL;
+
+ board = dma_alloc_coherent(dev, sizeof(gdth_ha_str),
+ &gdth_shost_dma(shost), GFP_KERNEL);
+ if (!board) {
+ scsi_host_put(shost);
+ return NULL;
+ }
+
+ gdth_shost_priv(shost) = board;
+
+ return shost;
+}
+
+static void gdth_free_host(struct Scsi_Host *shost)
+{
+ gdth_ha_str *h = gdth_shost_priv(shost);
+ dma_free_coherent(h->pdev ? &h->pdev->dev : NULL, sizeof(gdth_ha_str),
+ h, gdth_shost_dma(shost));
+ scsi_host_put(shost);
+}
+
#ifdef CONFIG_ISA
static int __init gdth_isa_probe_one(ulong32 isa_bios)
{
@@ -4664,10 +4708,10 @@ static int __init gdth_isa_probe_one(ulo
if (!gdth_search_isa(isa_bios))
return -ENXIO;
- shp = scsi_host_alloc(&gdth_template, sizeof(gdth_ha_str));
+ shp = gdth_host_alloc(NULL);
if (!shp)
return -ENOMEM;
- ha = shost_priv(shp);
+ ha = gdth_shost_priv(shp);
error = -ENODEV;
if (!gdth_init_isa(isa_bios,ha))
@@ -4691,7 +4735,7 @@ static int __init gdth_isa_probe_one(ulo
set_dma_mode(ha->drq,DMA_MODE_CASCADE);
enable_dma(ha->drq);
- shp->unchecked_isa_dma = 1;
+ shp->sense_buffer_isa = 1;
shp->irq = ha->irq;
shp->dma_channel = ha->drq;
@@ -4780,7 +4824,7 @@ static int __init gdth_isa_probe_one(ulo
out_free_irq:
free_irq(ha->irq, ha);
out_host_put:
- scsi_host_put(shp);
+ gdth_free_host(shp);
return error;
}
#endif /* CONFIG_ISA */
@@ -4796,10 +4840,11 @@ static int __init gdth_eisa_probe_one(us
if (!gdth_search_eisa(eisa_slot))
return -ENXIO;
- shp = scsi_host_alloc(&gdth_template, sizeof(gdth_ha_str));
+ /* RED-PEN NULL device ISA mask is 24bit, but EISA 32bit */
+ shp = gdth_host_alloc(NULL);
if (!shp)
return -ENOMEM;
- ha = shost_priv(shp);
+ ha = gdth_shost_priv(shp);
error = -ENODEV;
if (!gdth_init_eisa(eisa_slot,ha))
@@ -4815,7 +4860,6 @@ static int __init gdth_eisa_probe_one(us
goto out_host_put;
}
- shp->unchecked_isa_dma = 0;
shp->irq = ha->irq;
shp->dma_channel = 0xff;
@@ -4913,7 +4957,7 @@ static int __init gdth_eisa_probe_one(us
free_irq(ha->irq, ha);
gdth_ctr_count--;
out_host_put:
- scsi_host_put(shp);
+ gdth_free_host(shp);
return error;
}
#endif /* CONFIG_EISA */
@@ -4930,10 +4974,10 @@ static int gdth_pci_probe_one(gdth_pci_s
*ha_out = NULL;
- shp = scsi_host_alloc(&gdth_template, sizeof(gdth_ha_str));
+ shp = gdth_host_alloc(&pcistr->pdev->dev);
if (!shp)
return -ENOMEM;
- ha = shost_priv(shp);
+ ha = gdth_shost_priv(shp);
error = -ENODEV;
if (!gdth_init_pci(pdev, pcistr, ha))
@@ -4952,7 +4996,6 @@ static int gdth_pci_probe_one(gdth_pci_s
goto out_host_put;
}
- shp->unchecked_isa_dma = 0;
shp->irq = ha->irq;
shp->dma_channel = 0xff;
@@ -5059,7 +5102,7 @@ static int gdth_pci_probe_one(gdth_pci_s
free_irq(ha->irq, ha);
gdth_ctr_count--;
out_host_put:
- scsi_host_put(shp);
+ gdth_free_host(shp);
return error;
}
#endif /* CONFIG_PCI */
@@ -5101,7 +5144,7 @@ static void gdth_remove_one(gdth_ha_str
pci_unmap_single(ha->pdev,ha->ccb_phys,
sizeof(gdth_cmd_str),PCI_DMA_BIDIRECTIONAL);
- scsi_host_put(shp);
+ gdth_free_host(shp);
}
static int gdth_halt(struct notifier_block *nb, ulong event, void *buf)
--
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