> +static void myrb_monitor(struct work_struct *work);
> +static inline void DAC960_P_To_PD_TranslateDeviceState(void *DeviceState);
Can you please use normal kernel function names and a normal prefix?
Also there seems to be no good reason to need a forward declaration for
this function.
> +static struct myrb_devstate_name_entry {
> + enum myrb_devstate state;
> + char *name;
> +} myrb_devstate_name_list[] = {
> + { DAC960_V1_Device_Dead, "Dead" },
> + { DAC960_V1_Device_WriteOnly, "WriteOnly" },
> + { DAC960_V1_Device_Online, "Online" },
> + { DAC960_V1_Device_Critical, "Critical" },
> + { DAC960_V1_Device_Standby, "Standby" },
> + { DAC960_V1_Device_Offline, NULL },
> +};
Please use MYRB_ as prefix.
> +static char *myrb_devstate_name(enum myrb_devstate state)
> +{
> + struct myrb_devstate_name_entry *entry = myrb_devstate_name_list;
> +
> + while (entry && entry->name) {
> + if (entry->state == state)
> + return entry->name;
> + entry++;
> + }
> + return (state == DAC960_V1_Device_Offline) ? "Offline" : "Unknown";
Why not use ARRAY_SIZE and use a proper list entry for Offline?
> +static char *myrb_raidlevel_name(enum myrb_raidlevel level)
> +{
> + struct myrb_raidlevel_name_entry *entry = myrb_raidlevel_name_list;
> +
> + while (entry && entry->name) {
> + if (entry->level == level)
> + return entry->name;
> + entry++;
> + }
> + return NULL;
Same here - please use ARRAY_SIZE.
> +/**
> + * myrb_exec_cmd - executes command block and waits for completion.
> + *
> + * Return: command status
> + */
> +static unsigned short myrb_exec_cmd(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
> +{
> + DECLARE_COMPLETION_ONSTACK(Completion);
> + unsigned long flags;
> +
> + cmd_blk->Completion = &Completion;
> +
> + spin_lock_irqsave(&cb->queue_lock, flags);
> + cb->qcmd(cb, cmd_blk);
> + spin_unlock_irqrestore(&cb->queue_lock, flags);
> +
> + wait_for_completion(&Completion);
> + return cmd_blk->status;
> +}
My comment from ast time here is not addressed:
https://patchwork.kernel.org/comment/21613427/
> + static char *DAC960_EventMessages[] =
> + { "killed because write recovery failed",
> + "killed because of SCSI bus reset failure",
> + "killed because of double check condition",
> + "killed because it was removed",
> + "killed because of gross error on SCSI chip",
> + "killed because of bad tag returned from drive",
> + "killed because of timeout on SCSI command",
> + "killed because of reset SCSI command issued from system",
> + "killed because busy or parity error count exceeded limit",
> + "killed because of 'kill drive' command from system",
> + "killed because of selection timeout",
> + "killed due to SCSI phase sequence error",
> + "killed due to unknown status" };
Rather odd indentation. It might also look a lot nicer if moved outside
the function.
> + mbox->Type3E.addr = ev_addr;
> + status = myrb_exec_cmd(cb, cmd_blk);
> + if (status == DAC960_V1_NormalCompletion) {
> + if (ev_buf->SequenceNumber == event) {
...
> + }
> + }
> + } else
> + shost_printk(KERN_INFO, cb->host,
> + "Failed to get event log %d, status %04x\n",
> + event, status);
> +
Why not:
if (status != DAC960_V1_NormalCompletion) {
shost_printk(KERN_INFO, cb->host,
"Failed to get event log %d, status %04x\n",
event, status);
} else if (ev_buf->SequenceNumber == event) {
...
}
to reduce the indentation a bit?
> + for (ldev_num = 0; ldev_num < ldev_cnt; ldev_num++) {
> + struct myrb_ldev_info *old = NULL;
> + struct myrb_ldev_info *new = cb->ldev_info_buf + ldev_num;
> + struct scsi_device *sdev;
> + enum myrb_devstate old_state = DAC960_V1_Device_Offline;
> +
> + sdev = scsi_device_lookup(shost, myrb_logical_channel(shost),
> + ldev_num, 0);
> + if (sdev && sdev->hostdata)
> + old = sdev->hostdata;
> + else if (new->State != DAC960_V1_Device_Offline) {
> + if (sdev)
> + scsi_device_put(sdev);
> + shost_printk(KERN_INFO, shost,
> + "Adding Logical Drive %d in state %s\n",
> + ldev_num, myrb_devstate_name(new->State));
> + scsi_add_device(shost, myrb_logical_channel(shost),
> + ldev_num, 0);
> + break;
> + }
I don't think finding a device but not having a hostdata can happen
here, as we always set it up in slave_alloc.
So this could become something like:
sdev = scsi_device_lookup(shost, myrb_logical_channel(shost),
ldev_num, 0);
if (!sdev) {
if (new->State == DAC960_V1_Device_Offline)
continue;
shost_printk(KERN_INFO, shost,
"Adding Logical Drive %d in state %s\n",
ldev_num, myrb_devstate_name(new->State));
scsi_add_device(shost, myrb_logical_channel(shost),
ldev_num, 0);
break;
}
old = sdev->hostdata;
if (new->State != old->State)
shost_printk(KERN_INFO, shost,
"Logical Drive %d is now %s\n",
ldev_num, myrb_devstate_name(new->State));
if (new->WriteBack != old->WriteBack)
sdev_printk(KERN_INFO, sdev,
"Logical Drive is now WRITE %s\n",
new->WriteBack ? "BACK" : "THRU");
memcpy(old, new, sizeof(*new));
scsi_device_put(sdev);
}
But the break when adding the new device also looks odd to me. Is
it gurantee we only see a single new device per call?
> + /*
> + Initialize the Controller Firmware Version field and verify that it
> + is a supported firmware version. The supported firmware versions are:
> +
> + DAC1164P 5.06 and above
> + DAC960PTL/PRL/PJ/PG 4.06 and above
> + DAC960PU/PD/PL 3.51 and above
> + DAC960PU/PD/PL/P 2.73 and above
> + */
Please switch to normal kernel comment style.
> +#if defined(CONFIG_ALPHA)
#ifdef CONFIG_ALPHA
> +static int myrb_host_reset(struct scsi_cmnd *scmd)
> +{
> + struct Scsi_Host *shost = scmd->device->host;
> + struct myrb_hba *cb = (struct myrb_hba *)shost->hostdata;
cb is an odd variable name for this type. Also please use shost_priv()
> + ldev_info = sdev->hostdata;
> + if (!ldev_info ||
again, there should be no way for this to be NULL
> + if (sdev->channel == myrb_logical_channel(sdev->host)) {
Maybe split some ldev/pdev alloc_slave helpers out here?
> +static void myrb_slave_destroy(struct scsi_device *sdev)
> +{
> + void *hostdata = sdev->hostdata;
> +
> + if (hostdata) {
> + kfree(hostdata);
> + sdev->hostdata = NULL;
> + }
No need to check for NULL before kfree, and no need to zero a pointer
about to get freed itself. This could just be:
static void myrb_slave_destroy(struct scsi_device *sdev)
{
kfree(sdev->hostdata);
}
> +struct scsi_host_template myrb_template = {
> + .module = THIS_MODULE,
> + .name = "DAC960",
> + .proc_name = "myrb",
> + .queuecommand = myrb_queuecommand,
> + .eh_host_reset_handler = myrb_host_reset,
> + .slave_alloc = myrb_slave_alloc,
> + .slave_configure = myrb_slave_configure,
> + .slave_destroy = myrb_slave_destroy,
> + .bios_param = myrb_biosparam,
> + .cmd_size = sizeof(struct myrb_cmdblk),
> + .shost_attrs = myrb_shost_attrs,
> + .sdev_attrs = myrb_sdev_attrs,
> + .this_id = -1,
> +};
Would be nice to aligned the = with tabs.
> +static int
> +myrb_is_raid(struct device *dev)
> +{
> + struct scsi_device *sdev = to_scsi_device(dev);
> +
> + return (sdev->channel == myrb_logical_channel(sdev->host)) ? 1 : 0;
No need for the ? 1 : 0:
return sdev->channel == myrb_logical_channel(sdev->host);
> +static inline
> +void DAC960_LA_HardwareMailboxNewCommand(void __iomem *base)
> +{
> + writeb(DAC960_LA_IDB_HWMBOX_NEW_CMD,
> + base + DAC960_LA_InboundDoorBellRegisterOffset);
> +}
Please user proper linux style naming (also for constants and struct
members).
> +static inline
> +void DAC960_P_To_PD_TranslateReadWriteCommand(struct myrb_cmdblk *cmd_blk)
static inline void function();
or
static inline void
function()
please, but not the above.
> +static void DAC960_P_QueueCommand(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
Overly long line.
> +static const struct pci_device_id myrb_id_table[] = {
> + {
> + .vendor = PCI_VENDOR_ID_DEC,
> + .device = PCI_DEVICE_ID_DEC_21285,
> + .subvendor = PCI_SUBVENDOR_ID_MYLEX,
> + .subdevice = PCI_SUBDEVICE_ID_MYLEX_DAC960_LA,
> + .driver_data = (unsigned long) &DAC960_LA_privdata,
> + },
> + {
> + .vendor = PCI_VENDOR_ID_MYLEX,
> + .device = PCI_DEVICE_ID_MYLEX_DAC960_PG,
> + .subvendor = PCI_ANY_ID,
> + .subdevice = PCI_ANY_ID,
> + .driver_data = (unsigned long) &DAC960_PG_privdata,
> + },
Please use the PCI_DEVICE_SUB and PCI_VDEVICE macros.
