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| author | Giridhar Malavali <gmalavali@marvell.com> | 2018-12-21 20:33:45 +0300 |
|---|---|---|
| committer | Martin K. Petersen <martin.petersen@oracle.com> | 2019-01-12 06:08:15 +0300 |
| commit | 50b812755e9766fa0a1a28533f4d11a34a5b813e (patch) | |
| tree | 726439d7b8aad2a7fff5220e995601e946f244c4 /drivers/scsi/qla2xxx/qla_attr.c | |
| parent | 7855d2ba1172d716d96a628af7c5bafa5725ac57 (diff) | |
| download | linux-50b812755e9766fa0a1a28533f4d11a34a5b813e.tar.xz | |
scsi: qla2xxx: Fix DMA error when the DIF sg buffer crosses 4GB boundary
When SGE buffer containing DIF information crosses 4G boundary, it results
in DMA error. This patch fixes this issue by calculating SGE buffer size
and if it crosses 4G boundary, driver will split it into multiple SGE
buffers to avoid DMA error.
Signed-off-by: Giridhar Malavali <gmalavali@marvell.com>
Signed-off-by: Himanshu Madhani <hmadhani@marvell.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_attr.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_attr.c | 21 |
1 files changed, 19 insertions, 2 deletions
diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c index 00444dc79756..8b4dd72011bf 100644 --- a/drivers/scsi/qla2xxx/qla_attr.c +++ b/drivers/scsi/qla2xxx/qla_attr.c @@ -1002,7 +1002,7 @@ qla2x00_free_sysfs_attr(scsi_qla_host_t *vha, bool stop_beacon) /* Scsi_Host attributes. */ static ssize_t -qla2x00_drvr_version_show(struct device *dev, +qla2x00_driver_version_show(struct device *dev, struct device_attribute *attr, char *buf) { return scnprintf(buf, PAGE_SIZE, "%s\n", qla2x00_version_str); @@ -2059,7 +2059,21 @@ ql2xiniexchg_store(struct device *dev, struct device_attribute *attr, return strlen(buf); } -static DEVICE_ATTR(driver_version, S_IRUGO, qla2x00_drvr_version_show, NULL); +static ssize_t +qla2x00_dif_bundle_statistics_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + scsi_qla_host_t *vha = shost_priv(class_to_shost(dev)); + struct qla_hw_data *ha = vha->hw; + + return scnprintf(buf, PAGE_SIZE, + "cross=%llu read=%llu write=%llu kalloc=%llu dma_alloc=%llu unusable=%u\n", + ha->dif_bundle_crossed_pages, ha->dif_bundle_reads, + ha->dif_bundle_writes, ha->dif_bundle_kallocs, + ha->dif_bundle_dma_allocs, ha->pool.unusable.count); +} + +static DEVICE_ATTR(driver_version, S_IRUGO, qla2x00_driver_version_show, NULL); static DEVICE_ATTR(fw_version, S_IRUGO, qla2x00_fw_version_show, NULL); static DEVICE_ATTR(serial_num, S_IRUGO, qla2x00_serial_num_show, NULL); static DEVICE_ATTR(isp_name, S_IRUGO, qla2x00_isp_name_show, NULL); @@ -2112,6 +2126,8 @@ static DEVICE_ATTR(zio_threshold, 0644, static DEVICE_ATTR_RW(qlini_mode); static DEVICE_ATTR_RW(ql2xexchoffld); static DEVICE_ATTR_RW(ql2xiniexchg); +static DEVICE_ATTR(dif_bundle_statistics, 0444, + qla2x00_dif_bundle_statistics_show, NULL); struct device_attribute *qla2x00_host_attrs[] = { @@ -2150,6 +2166,7 @@ struct device_attribute *qla2x00_host_attrs[] = { &dev_attr_min_link_speed, &dev_attr_max_speed_sup, &dev_attr_zio_threshold, + &dev_attr_dif_bundle_statistics, NULL, /* reserve for qlini_mode */ NULL, /* reserve for ql2xiniexchg */ NULL, /* reserve for ql2xexchoffld */ |