- Audited ->cmnd use and it always copies
- Allocate DMAable hostdata separately
- Tell block layer explicitely to bounce
- Audited sense_buffer use and it always copies
- Remove unchecked_isa_dma finally
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/aha1542.c | 40 ++++++++++++++++++++++++++++++----------
1 file changed, 30 insertions(+), 10 deletions(-)
Index: linux/drivers/scsi/aha1542.c
===================================================================
--- linux.orig/drivers/scsi/aha1542.c
+++ linux/drivers/scsi/aha1542.c
@@ -151,7 +151,13 @@ struct aha1542_hostdata {
struct ccb ccb[AHA1542_MAILBOXES];
};
-#define HOSTDATA(host) ((struct aha1542_hostdata *) &host->hostdata)
+struct hd_ptr {
+ struct aha1542_hostdata *hostptr;
+ dma_addr_t dma;
+};
+
+#define HOSTDATA(host) (((struct hd_ptr *)shost_priv(host))->hostptr)
+#define HOSTDMA(host) (((struct hd_ptr *)shost_priv(host))->dma)
static DEFINE_SPINLOCK(aha1542_lock);
@@ -1125,23 +1131,28 @@ static int __init aha1542_detect(struct
}
for (indx = 0; indx < ARRAY_SIZE(bases); indx++)
if (bases[indx] != 0 && request_region(bases[indx], 4, "aha1542")) {
- shpnt = scsi_register(tpnt,
- sizeof(struct aha1542_hostdata));
+ struct aha1542_hostdata *host;
+
+ shpnt = scsi_register(tpnt, sizeof(struct hd_ptr));
if(shpnt==NULL) {
release_region(bases[indx], 4);
continue;
}
- /* For now we do this - until kmalloc is more intelligent
- we are resigned to stupid hacks like this */
- if (SCSI_BUF_PA(shpnt) >= ISA_DMA_THRESHOLD) {
- printk(KERN_ERR "Invalid address for shpnt with 1542.\n");
- goto unregister;
+
+ host = dma_alloc_coherent(NULL, sizeof(*host),
+ &HOSTDMA(shpnt), GFP_KERNEL);
+ if (!host) {
+ scsi_unregister(shpnt);
+ release_region(bases[indx], 4);
+ continue;
}
+
+ HOSTDATA(shpnt) = host;
+
if (!aha1542_test_port(bases[indx], shpnt))
goto unregister;
-
base_io = bases[indx];
/* Set the Bus on/off-times as not to ruin floppy performance */
@@ -1259,6 +1270,8 @@ fail:
continue;
unregister:
release_region(bases[indx], 4);
+ dma_free_coherent(NULL, sizeof(struct aha1542_hostdata),
+ HOSTDATA(shpnt), HOSTDMA(shpnt));
scsi_unregister(shpnt);
continue;
@@ -1275,6 +1288,8 @@ static int aha1542_release(struct Scsi_H
free_dma(shost->dma_channel);
if (shost->io_port && shost->n_io_port)
release_region(shost->io_port, shost->n_io_port);
+ dma_free_coherent(NULL, sizeof(struct aha1542_hostdata),
+ HOSTDATA(shost), HOSTDMA(shost));
scsi_unregister(shost);
return 0;
}
@@ -1746,6 +1761,11 @@ static int aha1542_biosparam(struct scsi
}
MODULE_LICENSE("GPL");
+static int aha154x_adjust_queue(struct scsi_device *device)
+{
+ blk_queue_bounce_limit(device->request_queue, BLK_BOUNCE_ISA);
+ return 0;
+}
static struct scsi_host_template driver_template = {
.proc_name = "aha1542",
@@ -1761,7 +1781,7 @@ static struct scsi_host_template driver_
.this_id = 7,
.sg_tablesize = AHA1542_SCATTER,
.cmd_per_lun = AHA1542_CMDLUN,
- .unchecked_isa_dma = 1,
.use_clustering = ENABLE_CLUSTERING,
+ .slave_alloc = aha154x_adjust_queue,
};
#include "scsi_module.c"
--
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