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Limit scatter/gather table size (need to be reviewed).

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@345 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Stanislaw Gruszka
2008-04-21 10:45:22 +00:00
parent 1399e8e64c
commit 9696649c7c
1 changed files with 33 additions and 1 deletions
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qla_isp/linux/isp_scst.c
+33 -1
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@@ -1386,7 +1386,7 @@ out:
static struct scst_tgt_template isp_tgt_template =
{
.sg_tablesize = SG_ALL, // FIXME do this depending of hardware ?
.sg_tablesize = SG_ALL, /* we set this value lately based on hardware */
.name = "qla_isp",
.unchecked_isa_dma = 0,
.use_clustering = 1,
@@ -1405,6 +1405,37 @@ static struct scst_tgt_template isp_tgt_template =
//.report_aen = isp_report_aen,
};
#ifdef ISP_DAC_SUPPORTED
#define ISP_A64 1
#else
#define ISP_A64 0
#endif
static int
get_sg_tablesize(ispsoftc_t *isp)
{
// FIXME: check if this is correct?
// FIXME: move to the low level driver and export via tpublic API
int rq_seglim, ct_seglim;
int nctios = (isp->isp_maxcmds < 4) ? 0 : isp->isp_maxcmds - 4;
if (IS_24XX(isp)) {
rq_seglim = 1;
ct_seglim = ISP_CDSEG64;
} else if (IS_2322(isp) || ISP_A64) {
rq_seglim = ISP_RQDSEG_T3;
ct_seglim = ISP_CDSEG64;
} else if (IS_FC(isp)) {
rq_seglim = ISP_RQDSEG_T2;
ct_seglim = ISP_CDSEG;
} else { // SPI
rq_seglim = ISP_RQDSEG;
ct_seglim = ISP_RQDSEG;
}
return rq_seglim + nctios * ct_seglim;
}
static void
bus_set_proc_data(bus_t *bp)
{
@@ -1458,6 +1489,7 @@ register_hba(bus_t *bp)
#undef GET
}
isp_tgt_template.sg_tablesize = get_sg_tablesize(bp->h.r_identity);
scst_tgt = scst_register(&isp_tgt_template, name);
if (scst_tgt == NULL) {
Eprintk("cannot register scst device %s for %s%d\n", name, bp->h.r_name, bp->h.r_inst);