[SCSI] qla2xxx: Add EDC-update support.

Interface allows for the update of onboard EDC firmware
present on mezzanine ISP25xx type cards.

Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>

1 files changed, 144 insertions, 0 deletions

diff --git a/drivers/scsi/qla2xxx/qla_attr.c b/drivers/scsi/qla2xxx/qla_attr.c
index c017dba90039..877990115f53 100644
--- a/drivers/scsi/qla2xxx/qla_attr.c
+++ b/drivers/scsi/qla2xxx/qla_attr.c
@@ -548,6 +548,144 @@ static struct bin_attribute sysfs_reset_attr = {
         .write = qla2x00_sysfs_write_reset,
 };
 
+static ssize_t
+qla2x00_sysfs_write_edc(struct kobject *kobj,
+                        struct bin_attribute *bin_attr,
+                        char *buf, loff_t off, size_t count)
+{
+        struct scsi_qla_host *vha = shost_priv(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        struct qla_hw_data *ha = vha->hw;
+        uint16_t dev, adr, opt, len;
+        int rval;
+
+        ha->edc_data_len = 0;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count < 8)
+                return 0;
+
+        if (!ha->edc_data) {
+                ha->edc_data = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
+                    &ha->edc_data_dma);
+                if (!ha->edc_data) {
+                        DEBUG2(qla_printk(KERN_INFO, ha,
+                            "Unable to allocate memory for EDC write.\n"));
+                        return 0;
+                }
+        }
+
+        dev = le16_to_cpup((void *)&buf[0]);
+        adr = le16_to_cpup((void *)&buf[2]);
+        opt = le16_to_cpup((void *)&buf[4]);
+        len = le16_to_cpup((void *)&buf[6]);
+
+        if (!(opt & BIT_0))
+                if (len == 0 || len > DMA_POOL_SIZE || len > count - 8)
+                        return -EINVAL;
+
+        memcpy(ha->edc_data, &buf[8], len);
+
+        rval = qla2x00_write_edc(vha, dev, adr, ha->edc_data_dma,
+            ha->edc_data, len, opt);
+        if (rval != QLA_SUCCESS) {
+                DEBUG2(qla_printk(KERN_INFO, ha,
+                    "Unable to write EDC (%x) %02x:%02x:%04x:%02x:%02x.\n",
+                    rval, dev, adr, opt, len, *buf));
+                return 0;
+        }
+
+        return count;
+}
+
+static struct bin_attribute sysfs_edc_attr = {
+        .attr = {
+                .name = "edc",
+                .mode = S_IWUSR,
+        },
+        .size = 0,
+        .write = qla2x00_sysfs_write_edc,
+};
+
+static ssize_t
+qla2x00_sysfs_write_edc_status(struct kobject *kobj,
+                        struct bin_attribute *bin_attr,
+                        char *buf, loff_t off, size_t count)
+{
+        struct scsi_qla_host *vha = shost_priv(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        struct qla_hw_data *ha = vha->hw;
+        uint16_t dev, adr, opt, len;
+        int rval;
+
+        ha->edc_data_len = 0;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count < 8)
+                return 0;
+
+        if (!ha->edc_data) {
+                ha->edc_data = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
+                    &ha->edc_data_dma);
+                if (!ha->edc_data) {
+                        DEBUG2(qla_printk(KERN_INFO, ha,
+                            "Unable to allocate memory for EDC status.\n"));
+                        return 0;
+                }
+        }
+
+        dev = le16_to_cpup((void *)&buf[0]);
+        adr = le16_to_cpup((void *)&buf[2]);
+        opt = le16_to_cpup((void *)&buf[4]);
+        len = le16_to_cpup((void *)&buf[6]);
+
+        if (!(opt & BIT_0))
+                if (len == 0 || len > DMA_POOL_SIZE)
+                        return -EINVAL;
+
+        memset(ha->edc_data, 0, len);
+        rval = qla2x00_read_edc(vha, dev, adr, ha->edc_data_dma,
+            ha->edc_data, len, opt);
+        if (rval != QLA_SUCCESS) {
+                DEBUG2(qla_printk(KERN_INFO, ha,
+                    "Unable to write EDC status (%x) %02x:%02x:%04x:%02x.\n",
+                    rval, dev, adr, opt, len));
+                return 0;
+        }
+
+        ha->edc_data_len = len;
+
+        return count;
+}
+
+static ssize_t
+qla2x00_sysfs_read_edc_status(struct kobject *kobj,
+                           struct bin_attribute *bin_attr,
+                           char *buf, loff_t off, size_t count)
+{
+        struct scsi_qla_host *vha = shost_priv(dev_to_shost(container_of(kobj,
+            struct device, kobj)));
+        struct qla_hw_data *ha = vha->hw;
+
+        if (!capable(CAP_SYS_ADMIN) || off != 0 || count == 0)
+                return 0;
+
+        if (!ha->edc_data || ha->edc_data_len == 0 || ha->edc_data_len > count)
+                return -EINVAL;
+
+        memcpy(buf, ha->edc_data, ha->edc_data_len);
+
+        return ha->edc_data_len;
+}
+
+static struct bin_attribute sysfs_edc_status_attr = {
+        .attr = {
+                .name = "edc_status",
+                .mode = S_IRUSR | S_IWUSR,
+        },
+        .size = 0,
+        .write = qla2x00_sysfs_write_edc_status,
+        .read = qla2x00_sysfs_read_edc_status,
+};
+
 static struct sysfs_entry {
         char *name;
         struct bin_attribute *attr;
@@ -560,6 +698,8 @@ static struct sysfs_entry {
         { "vpd", &sysfs_vpd_attr, 1 },
         { "sfp", &sysfs_sfp_attr, 1 },
         { "reset", &sysfs_reset_attr, },
+        { "edc", &sysfs_edc_attr, 2 },
+        { "edc_status", &sysfs_edc_status_attr, 2 },
         { NULL },
 };
 
@@ -573,6 +713,8 @@ qla2x00_alloc_sysfs_attr(scsi_qla_host_t *vha)
         for (iter = bin_file_entries; iter->name; iter++) {
                 if (iter->is4GBp_only && !IS_FWI2_CAPABLE(vha->hw))
                         continue;
+                if (iter->is4GBp_only == 2 && !IS_QLA25XX(vha->hw))
+                        continue;
 
                 ret = sysfs_create_bin_file(&host->shost_gendev.kobj,
                     iter->attr);
@@ -593,6 +735,8 @@ qla2x00_free_sysfs_attr(scsi_qla_host_t *vha)
         for (iter = bin_file_entries; iter->name; iter++) {
                 if (iter->is4GBp_only && !IS_FWI2_CAPABLE(ha))
                         continue;
+                if (iter->is4GBp_only == 2 && !IS_QLA25XX(ha))
+                        continue;
 
                 sysfs_remove_bin_file(&host->shost_gendev.kobj,
                     iter->attr);