- 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>
---
drivers/scsi/gdth.c | 79 +++++++++++++++++++++++++++++++++++++++-------------
1 file changed, 60 insertions(+), 19 deletions(-)
Index: linux/drivers/scsi/gdth.c
===================================================================
--- linux.orig/drivers/scsi/gdth.c
+++ linux/drivers/scsi/gdth.c
@@ -138,6 +138,13 @@
#include <scsi/scsi_host.h>
#include "gdth.h"
+
+struct host_ptr {
+ gdth_ha_str *host_ptr;
+};
+
+#define gdth_shost_priv(host) (((struct host_ptr *)shost_priv(host))->host_ptr)
+
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);
@@ -490,7 +497,7 @@ 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;
struct scatterlist one_sg;
@@ -3933,7 +3940,7 @@ 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);
@@ -3941,7 +3948,7 @@ 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;
@@ -3994,7 +4001,7 @@ 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;
@@ -4023,7 +4030,7 @@ 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]));
@@ -4717,6 +4724,13 @@ static int gdth_slave_configure(struct s
return 0;
}
+static int gdth_adjust_queue(struct scsi_device *device)
+{
+ if (device->host->sense_buffer_mask)
+ 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,
@@ -4730,10 +4744,39 @@ 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(gfp_t gfp)
+{
+ struct Scsi_Host *shost;
+ gdth_ha_str *board;
+ shost = scsi_host_alloc(&gdth_template, sizeof(struct host_ptr));
+ if (!shost)
+ return NULL;
+
+ board = (void *)__get_free_pages(gfp|GFP_KERNEL,
+ get_order(sizeof(gdth_ha_str)));
+ if (!board) {
+ scsi_host_put(shost);
+ return NULL;
+ }
+
+ memset(board, 0, sizeof(gdth_ha_str));
+ gdth_shost_priv(shost) = board;
+
+ return shost;
+}
+
+static void gdth_free_host(struct Scsi_Host *shost)
+{
+ free_pages((unsigned long)gdth_shost_priv(shost),
+ get_order(sizeof(gdth_ha_str)));
+ scsi_host_put(shost);
+}
+
+
#ifdef CONFIG_ISA
static int __init gdth_isa_probe_one(ulong32 isa_bios)
{
@@ -4745,10 +4788,10 @@ 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(GFP_DMA);
if (!shp)
return -ENOMEM;
- ha = shost_priv(shp);
+ ha = gdth_shost_priv(shp);
error = -ENODEV;
if (!gdth_init_isa(isa_bios,ha))
@@ -4772,7 +4815,7 @@ 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_mask = DMA_24BIT_MASK;
shp->irq = ha->irq;
shp->dma_channel = ha->drq;
@@ -4860,7 +4903,7 @@ 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 */
@@ -4876,10 +4919,10 @@ 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));
+ shp = gdth_host_alloc(0);
if (!shp)
return -ENOMEM;
- ha = shost_priv(shp);
+ ha = gdth_shost_priv(shp);
error = -ENODEV;
if (!gdth_init_eisa(eisa_slot,ha))
@@ -4895,7 +4938,6 @@ 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;
@@ -4992,7 +5034,7 @@ 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 */
@@ -5005,10 +5047,10 @@ static int __init gdth_pci_probe_one(gdt
dma_addr_t scratch_dma_handle = 0;
int error, i;
- shp = scsi_host_alloc(&gdth_template, sizeof(gdth_ha_str));
+ shp = gdth_host_alloc(0);
if (!shp)
return -ENOMEM;
- ha = shost_priv(shp);
+ ha = gdth_shost_priv(shp);
error = -ENODEV;
if (!gdth_init_pci(&pcistr[ctr],ha))
@@ -5027,7 +5069,6 @@ static int __init gdth_pci_probe_one(gdt
goto out_host_put;
}
- shp->unchecked_isa_dma = 0;
shp->irq = ha->irq;
shp->dma_channel = 0xff;
@@ -5129,7 +5170,7 @@ static int __init gdth_pci_probe_one(gdt
free_irq(ha->irq, ha);
gdth_ctr_count--;
out_host_put:
- scsi_host_put(shp);
+ gdth_free_host(shp);
return error;
}
#endif /* CONFIG_PCI */
@@ -5171,7 +5212,7 @@ 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 __init gdth_init(void)
-
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