kvj
/
linux-zen-desktop
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity
linux-zen-desktop/drivers/scsi/megaraid.c

4637 lines
105 KiB
C
Raw Normal View History

Initial commit
2023-08-30 17:31:07 +02:00
// SPDX-License-Identifier: GPL-2.0-or-later
/*
*
* Linux MegaRAID device driver
*
* Copyright (c) 2002 LSI Logic Corporation.
*
* Copyright (c) 2002 Red Hat, Inc. All rights reserved.
* - fixes
* - speed-ups (list handling fixes, issued_list, optimizations.)
* - lots of cleanups.
*
* Copyright (c) 2003 Christoph Hellwig <hch@lst.de>
* - new-style, hotplug-aware pci probing and scsi registration
*
* Version : v2.00.4 Mon Nov 14 14:02:43 EST 2005 - Seokmann Ju
* <Seokmann.Ju@lsil.com>
*
* Description: Linux device driver for LSI Logic MegaRAID controller
*
* Supported controllers: MegaRAID 418, 428, 438, 466, 762, 467, 471, 490, 493
* 518, 520, 531, 532
*
* This driver is supported by LSI Logic, with assistance from Red Hat, Dell,
* and others. Please send updates to the mailing list
* linux-scsi@vger.kernel.org .
*/
#include <linux/mm.h>
#include <linux/fs.h>
#include <linux/blkdev.h>
#include <linux/uaccess.h>
#include <asm/io.h>
#include <linux/completion.h>
#include <linux/delay.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/reboot.h>
#include <linux/module.h>
#include <linux/list.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_eh.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsicam.h>
#include "megaraid.h"
#define MEGARAID_MODULE_VERSION "2.00.4"
MODULE_AUTHOR ("sju@lsil.com");
MODULE_DESCRIPTION ("LSI Logic MegaRAID legacy driver");
MODULE_LICENSE ("GPL");
MODULE_VERSION(MEGARAID_MODULE_VERSION);
static DEFINE_MUTEX(megadev_mutex);
static unsigned int max_cmd_per_lun = DEF_CMD_PER_LUN;
module_param(max_cmd_per_lun, uint, 0);
MODULE_PARM_DESC(max_cmd_per_lun, "Maximum number of commands which can be issued to a single LUN (default=DEF_CMD_PER_LUN=63)");
static unsigned short int max_sectors_per_io = MAX_SECTORS_PER_IO;
module_param(max_sectors_per_io, ushort, 0);
MODULE_PARM_DESC(max_sectors_per_io, "Maximum number of sectors per I/O request (default=MAX_SECTORS_PER_IO=128)");
static unsigned short int max_mbox_busy_wait = MBOX_BUSY_WAIT;
module_param(max_mbox_busy_wait, ushort, 0);
MODULE_PARM_DESC(max_mbox_busy_wait, "Maximum wait for mailbox in microseconds if busy (default=MBOX_BUSY_WAIT=10)");
#define RDINDOOR(adapter) readl((adapter)->mmio_base + 0x20)
#define RDOUTDOOR(adapter) readl((adapter)->mmio_base + 0x2C)
#define WRINDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x20)
#define WROUTDOOR(adapter,value) writel(value, (adapter)->mmio_base + 0x2C)
/*
* Global variables
*/
static int hba_count;
static adapter_t *hba_soft_state[MAX_CONTROLLERS];
static struct proc_dir_entry *mega_proc_dir_entry;
/* For controller re-ordering */
static struct mega_hbas mega_hbas[MAX_CONTROLLERS];
static long
megadev_unlocked_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
/*
* The File Operations structure for the serial/ioctl interface of the driver
*/
static const struct file_operations megadev_fops = {
.owner = THIS_MODULE,
.unlocked_ioctl = megadev_unlocked_ioctl,
.open = megadev_open,
.llseek = noop_llseek,
};
/*
* Array to structures for storing the information about the controllers. This
* information is sent to the user level applications, when they do an ioctl
* for this information.
*/
static struct mcontroller mcontroller[MAX_CONTROLLERS];
/* The current driver version */
static u32 driver_ver = 0x02000000;
/* major number used by the device for character interface */
static int major;
#define IS_RAID_CH(hba, ch) (((hba)->mega_ch_class >> (ch)) & 0x01)
/*
* Debug variable to print some diagnostic messages
*/
static int trace_level;
/**
* mega_setup_mailbox()
* @adapter: pointer to our soft state
*
* Allocates a 8 byte aligned memory for the handshake mailbox.
*/
static int
mega_setup_mailbox(adapter_t *adapter)
{
unsigned long align;
adapter->una_mbox64 = dma_alloc_coherent(&adapter->dev->dev,
sizeof(mbox64_t),
&adapter->una_mbox64_dma,
GFP_KERNEL);
if( !adapter->una_mbox64 ) return -1;
adapter->mbox = &adapter->una_mbox64->mbox;
adapter->mbox = (mbox_t *)((((unsigned long) adapter->mbox) + 15) &
(~0UL ^ 0xFUL));
adapter->mbox64 = (mbox64_t *)(((unsigned long)adapter->mbox) - 8);
align = ((void *)adapter->mbox) - ((void *)&adapter->una_mbox64->mbox);
adapter->mbox_dma = adapter->una_mbox64_dma + 8 + align;
/*
* Register the mailbox if the controller is an io-mapped controller
*/
if( adapter->flag & BOARD_IOMAP ) {
outb(adapter->mbox_dma & 0xFF,
adapter->host->io_port + MBOX_PORT0);
outb((adapter->mbox_dma >> 8) & 0xFF,
adapter->host->io_port + MBOX_PORT1);
outb((adapter->mbox_dma >> 16) & 0xFF,
adapter->host->io_port + MBOX_PORT2);
outb((adapter->mbox_dma >> 24) & 0xFF,
adapter->host->io_port + MBOX_PORT3);
outb(ENABLE_MBOX_BYTE,
adapter->host->io_port + ENABLE_MBOX_REGION);
irq_ack(adapter);
irq_enable(adapter);
}
return 0;
}
/*
* mega_query_adapter()
* @adapter - pointer to our soft state
*
* Issue the adapter inquiry commands to the controller and find out
* information and parameter about the devices attached
*/
static int
mega_query_adapter(adapter_t *adapter)
{
dma_addr_t prod_info_dma_handle;
mega_inquiry3 *inquiry3;
struct mbox_out mbox;
u8 *raw_mbox = (u8 *)&mbox;
int retval;
/* Initialize adapter inquiry mailbox */
memset((void *)adapter->mega_buffer, 0, MEGA_BUFFER_SIZE);
memset(&mbox, 0, sizeof(mbox));
/*
* Try to issue Inquiry3 command
* if not succeeded, then issue MEGA_MBOXCMD_ADAPTERINQ command and
* update enquiry3 structure
*/
mbox.xferaddr = (u32)adapter->buf_dma_handle;
inquiry3 = (mega_inquiry3 *)adapter->mega_buffer;
raw_mbox[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */
raw_mbox[2] = NC_SUBOP_ENQUIRY3; /* i.e. 0x0F */
raw_mbox[3] = ENQ3_GET_SOLICITED_FULL; /* i.e. 0x02 */
/* Issue a blocking command to the card */
if ((retval = issue_scb_block(adapter, raw_mbox))) {
/* the adapter does not support 40ld */
mraid_ext_inquiry *ext_inq;
mraid_inquiry *inq;
dma_addr_t dma_handle;
ext_inq = dma_alloc_coherent(&adapter->dev->dev,
sizeof(mraid_ext_inquiry),
&dma_handle, GFP_KERNEL);
if( ext_inq == NULL ) return -1;
inq = &ext_inq->raid_inq;
mbox.xferaddr = (u32)dma_handle;
/*issue old 0x04 command to adapter */
mbox.cmd = MEGA_MBOXCMD_ADPEXTINQ;
issue_scb_block(adapter, raw_mbox);
/*
* update Enquiry3 and ProductInfo structures with
* mraid_inquiry structure
*/
mega_8_to_40ld(inq, inquiry3,
(mega_product_info *)&adapter->product_info);
dma_free_coherent(&adapter->dev->dev,
sizeof(mraid_ext_inquiry), ext_inq,
dma_handle);
} else { /*adapter supports 40ld */
adapter->flag |= BOARD_40LD;
/*
* get product_info, which is static information and will be
* unchanged
*/
prod_info_dma_handle = dma_map_single(&adapter->dev->dev,
(void *)&adapter->product_info,
sizeof(mega_product_info),
DMA_FROM_DEVICE);
mbox.xferaddr = prod_info_dma_handle;
raw_mbox[0] = FC_NEW_CONFIG; /* i.e. mbox->cmd=0xA1 */
raw_mbox[2] = NC_SUBOP_PRODUCT_INFO; /* i.e. 0x0E */
if ((retval = issue_scb_block(adapter, raw_mbox)))
dev_warn(&adapter->dev->dev,
"Product_info cmd failed with error: %d\n",
retval);
dma_unmap_single(&adapter->dev->dev, prod_info_dma_handle,
sizeof(mega_product_info), DMA_FROM_DEVICE);
}
/*
* kernel scans the channels from 0 to <= max_channel
*/
adapter->host->max_channel =
adapter->product_info.nchannels + NVIRT_CHAN -1;
adapter->host->max_id = 16; /* max targets per channel */
adapter->host->max_lun = 7; /* Up to 7 luns for non disk devices */
adapter->host->cmd_per_lun = max_cmd_per_lun;
adapter->numldrv = inquiry3->num_ldrv;
adapter->max_cmds = adapter->product_info.max_commands;
if(adapter->max_cmds > MAX_COMMANDS)
adapter->max_cmds = MAX_COMMANDS;
adapter->host->can_queue = adapter->max_cmds - 1;
/*
* Get the maximum number of scatter-gather elements supported by this
* firmware
*/
mega_get_max_sgl(adapter);
adapter->host->sg_tablesize = adapter->sglen;
/* use HP firmware and bios version encoding
Note: fw_version[0|1] and bios_version[0|1] were originally shifted
right 8 bits making them zero. This 0 value was hardcoded to fix
sparse warnings. */
if (adapter->product_info.subsysvid == PCI_VENDOR_ID_HP) {
snprintf(adapter->fw_version, sizeof(adapter->fw_version),
"%c%d%d.%d%d",
adapter->product_info.fw_version[2],
0,
adapter->product_info.fw_version[1] & 0x0f,
0,
adapter->product_info.fw_version[0] & 0x0f);
snprintf(adapter->bios_version, sizeof(adapter->fw_version),
"%c%d%d.%d%d",
adapter->product_info.bios_version[2],
0,
adapter->product_info.bios_version[1] & 0x0f,
0,
adapter->product_info.bios_version[0] & 0x0f);
} else {
memcpy(adapter->fw_version,
(char *)adapter->product_info.fw_version, 4);
adapter->fw_version[4] = 0;
memcpy(adapter->bios_version,
(char *)adapter->product_info.bios_version, 4);
adapter->bios_version[4] = 0;
}
dev_notice(&adapter->dev->dev, "[%s:%s] detected %d logical drives\n",
adapter->fw_version, adapter->bios_version, adapter->numldrv);
/*
* Do we support extended (>10 bytes) cdbs
*/
adapter->support_ext_cdb = mega_support_ext_cdb(adapter);
if (adapter->support_ext_cdb)
dev_notice(&adapter->dev->dev, "supports extended CDBs\n");
return 0;
}
/**
* mega_runpendq()
* @adapter: pointer to our soft state
*
* Runs through the list of pending requests.
*/
static inline void
mega_runpendq(adapter_t *adapter)
{
if(!list_empty(&adapter->pending_list))
__mega_runpendq(adapter);
}
/*
* megaraid_queue()
* @scmd - Issue this scsi command
* @done - the callback hook into the scsi mid-layer
*
* The command queuing entry point for the mid-layer.
*/
static int megaraid_queue_lck(struct scsi_cmnd *scmd)
{
adapter_t *adapter;
scb_t *scb;
int busy=0;
unsigned long flags;
adapter = (adapter_t *)scmd->device->host->hostdata;
/*
* Allocate and build a SCB request
* busy flag will be set if mega_build_cmd() command could not
* allocate scb. We will return non-zero status in that case.
* NOTE: scb can be null even though certain commands completed
* successfully, e.g., MODE_SENSE and TEST_UNIT_READY, we would
* return 0 in that case.
*/
spin_lock_irqsave(&adapter->lock, flags);
scb = mega_build_cmd(adapter, scmd, &busy);
if (!scb)
goto out;
scb->state |= SCB_PENDQ;
list_add_tail(&scb->list, &adapter->pending_list);
/*
* Check if the HBA is in quiescent state, e.g., during a
* delete logical drive opertion. If it is, don't run
* the pending_list.
*/
if (atomic_read(&adapter->quiescent) == 0)
mega_runpendq(adapter);
busy = 0;
out:
spin_unlock_irqrestore(&adapter->lock, flags);
return busy;
}
static DEF_SCSI_QCMD(megaraid_queue)
/**
* mega_allocate_scb()
* @adapter: pointer to our soft state
* @cmd: scsi command from the mid-layer
*
* Allocate a SCB structure. This is the central structure for controller
* commands.
*/
static inline scb_t *
mega_allocate_scb(adapter_t *adapter, struct scsi_cmnd *cmd)
{
struct list_head *head = &adapter->free_list;
scb_t *scb;
/* Unlink command from Free List */
if( !list_empty(head) ) {
scb = list_entry(head->next, scb_t, list);
list_del_init(head->next);
scb->state = SCB_ACTIVE;
scb->cmd = cmd;
scb->dma_type = MEGA_DMA_TYPE_NONE;
return scb;
}
return NULL;
}
/**
* mega_get_ldrv_num()
* @adapter: pointer to our soft state
* @cmd: scsi mid layer command
* @channel: channel on the controller
*
* Calculate the logical drive number based on the information in scsi command
* and the channel number.
*/
static inline int
mega_get_ldrv_num(adapter_t *adapter, struct scsi_cmnd *cmd, int channel)
{
int tgt;
int ldrv_num;
tgt = cmd->device->id;
if ( tgt > adapter->this_id )
tgt--; /* we do not get inquires for initiator id */
ldrv_num = (channel * 15) + tgt;
/*
* If we have a logical drive with boot enabled, project it first
*/
if( adapter->boot_ldrv_enabled ) {
if( ldrv_num == 0 ) {
ldrv_num = adapter->boot_ldrv;
}
else {
if( ldrv_num <= adapter->boot_ldrv ) {
ldrv_num--;
}
}
}
/*
* If "delete logical drive" feature is enabled on this controller.
* Do only if at least one delete logical drive operation was done.
*
* Also, after logical drive deletion, instead of logical drive number,
* the value returned should be 0x80+logical drive id.
*
* These is valid only for IO commands.
*/
if (adapter->support_random_del && adapter->read_ldidmap )
switch (cmd->cmnd[0]) {
case READ_6:
case WRITE_6:
case READ_10:
case WRITE_10:
ldrv_num += 0x80;
}
return ldrv_num;
}
/**
* mega_build_cmd()
* @adapter: pointer to our soft state
* @cmd: Prepare using this scsi command
* @busy: busy flag if no resources
*
* Prepares a command and scatter gather list for the controller. This routine
* also finds out if the commands is intended for a logical drive or a
* physical device and prepares the controller command accordingly.
*
* We also re-order the logical drives and physical devices based on their
* boot settings.
*/
static scb_t *
mega_build_cmd(adapter_t *adapter, struct scsi_cmnd *cmd, int *busy)
{
mega_passthru *pthru;
scb_t *scb;
mbox_t *mbox;
u32 seg;
char islogical;
int max_ldrv_num;
int channel = 0;
int target = 0;
int ldrv_num = 0; /* logical drive number */
/*
* We know what channels our logical drives are on - mega_find_card()
*/
islogical = adapter->logdrv_chan[cmd->device->channel];
/*
* The theory: If physical drive is chosen for boot, all the physical
* devices are exported before the logical drives, otherwise physical
* devices are pushed after logical drives, in which case - Kernel sees
* the physical devices on virtual channel which is obviously converted
* to actual channel on the HBA.
*/
if( adapter->boot_pdrv_enabled ) {
if( islogical ) {
/* logical channel */
channel = cmd->device->channel -
adapter->product_info.nchannels;
}
else {
/* this is physical channel */
channel = cmd->device->channel;
target = cmd->device->id;
/*
* boot from a physical disk, that disk needs to be
* exposed first IF both the channels are SCSI, then
* booting from the second channel is not allowed.
*/
if( target == 0 ) {
target = adapter->boot_pdrv_tgt;
}
else if( target == adapter->boot_pdrv_tgt ) {
target = 0;
}
}
}
else {
if( islogical ) {
/* this is the logical channel */
channel = cmd->device->channel;
}
else {
/* physical channel */
channel = cmd->device->channel - NVIRT_CHAN;
target = cmd->device->id;
}
}
if(islogical) {
/* have just LUN 0 for each target on virtual channels */
if (cmd->device->lun) {
cmd->result = (DID_BAD_TARGET << 16);
scsi_done(cmd);
return NULL;
}
ldrv_num = mega_get_ldrv_num(adapter, cmd, channel);
max_ldrv_num = (adapter->flag & BOARD_40LD) ?
MAX_LOGICAL_DRIVES_40LD : MAX_LOGICAL_DRIVES_8LD;
/*
* max_ldrv_num increases by 0x80 if some logical drive was
* deleted.
*/
if(adapter->read_ldidmap)
max_ldrv_num += 0x80;
if(ldrv_num > max_ldrv_num ) {
cmd->result = (DID_BAD_TARGET << 16);
scsi_done(cmd);
return NULL;
}
}
else {
if( cmd->device->lun > 7) {
/*
* Do not support lun >7 for physically accessed
* devices
*/
cmd->result = (DID_BAD_TARGET << 16);
scsi_done(cmd);
return NULL;
}
}
/*
*
* Logical drive commands
*
*/
if(islogical) {
switch (cmd->cmnd[0]) {
case TEST_UNIT_READY:
#if MEGA_HAVE_CLUSTERING
/*
* Do we support clustering and is the support enabled
* If no, return success always
*/
if( !adapter->has_cluster ) {
cmd->result = (DID_OK << 16);
scsi_done(cmd);
return NULL;
}
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
scb->raw_mbox[2] = MEGA_RESERVATION_STATUS;
scb->raw_mbox[3] = ldrv_num;
scb->dma_direction = DMA_NONE;
return scb;
#else
cmd->result = (DID_OK << 16);
scsi_done(cmd);
return NULL;
#endif
case MODE_SENSE: {
char *buf;
struct scatterlist *sg;
sg = scsi_sglist(cmd);
buf = kmap_atomic(sg_page(sg)) + sg->offset;
memset(buf, 0, cmd->cmnd[4]);
kunmap_atomic(buf - sg->offset);
cmd->result = (DID_OK << 16);
scsi_done(cmd);
return NULL;
}
case READ_CAPACITY:
case INQUIRY:
if(!(adapter->flag & (1L << cmd->device->channel))) {
dev_notice(&adapter->dev->dev,
"scsi%d: scanning scsi channel %d "
"for logical drives\n",
adapter->host->host_no,
cmd->device->channel);
adapter->flag |= (1L << cmd->device->channel);
}
/* Allocate a SCB and initialize passthru */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
pthru = scb->pthru;
mbox = (mbox_t *)scb->raw_mbox;
memset(mbox, 0, sizeof(scb->raw_mbox));
memset(pthru, 0, sizeof(mega_passthru));
pthru->timeout = 0;
pthru->ars = 1;
pthru->reqsenselen = 14;
pthru->islogical = 1;
pthru->logdrv = ldrv_num;
pthru->cdblen = cmd->cmd_len;
memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
if( adapter->has_64bit_addr ) {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
}
else {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
}
scb->dma_direction = DMA_FROM_DEVICE;
pthru->numsgelements = mega_build_sglist(adapter, scb,
&pthru->dataxferaddr, &pthru->dataxferlen);
mbox->m_out.xferaddr = scb->pthru_dma_addr;
return scb;
case READ_6:
case WRITE_6:
case READ_10:
case WRITE_10:
case READ_12:
case WRITE_12:
/* Allocate a SCB and initialize mailbox */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
mbox = (mbox_t *)scb->raw_mbox;
memset(mbox, 0, sizeof(scb->raw_mbox));
mbox->m_out.logdrv = ldrv_num;
/*
* A little hack: 2nd bit is zero for all scsi read
* commands and is set for all scsi write commands
*/
if( adapter->has_64bit_addr ) {
mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
MEGA_MBOXCMD_LWRITE64:
MEGA_MBOXCMD_LREAD64 ;
}
else {
mbox->m_out.cmd = (*cmd->cmnd & 0x02) ?
MEGA_MBOXCMD_LWRITE:
MEGA_MBOXCMD_LREAD ;
}
/*
* 6-byte READ(0x08) or WRITE(0x0A) cdb
*/
if( cmd->cmd_len == 6 ) {
mbox->m_out.numsectors = (u32) cmd->cmnd[4];
mbox->m_out.lba =
((u32)cmd->cmnd[1] << 16) |
((u32)cmd->cmnd[2] << 8) |
(u32)cmd->cmnd[3];
mbox->m_out.lba &= 0x1FFFFF;
#if MEGA_HAVE_STATS
/*
* Take modulo 0x80, since the logical drive
* number increases by 0x80 when a logical
* drive was deleted
*/
if (*cmd->cmnd == READ_6) {
adapter->nreads[ldrv_num%0x80]++;
adapter->nreadblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
} else {
adapter->nwrites[ldrv_num%0x80]++;
adapter->nwriteblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
}
#endif
}
/*
* 10-byte READ(0x28) or WRITE(0x2A) cdb
*/
if( cmd->cmd_len == 10 ) {
mbox->m_out.numsectors =
(u32)cmd->cmnd[8] |
((u32)cmd->cmnd[7] << 8);
mbox->m_out.lba =
((u32)cmd->cmnd[2] << 24) |
((u32)cmd->cmnd[3] << 16) |
((u32)cmd->cmnd[4] << 8) |
(u32)cmd->cmnd[5];
#if MEGA_HAVE_STATS
if (*cmd->cmnd == READ_10) {
adapter->nreads[ldrv_num%0x80]++;
adapter->nreadblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
} else {
adapter->nwrites[ldrv_num%0x80]++;
adapter->nwriteblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
}
#endif
}
/*
* 12-byte READ(0xA8) or WRITE(0xAA) cdb
*/
if( cmd->cmd_len == 12 ) {
mbox->m_out.lba =
((u32)cmd->cmnd[2] << 24) |
((u32)cmd->cmnd[3] << 16) |
((u32)cmd->cmnd[4] << 8) |
(u32)cmd->cmnd[5];
mbox->m_out.numsectors =
((u32)cmd->cmnd[6] << 24) |
((u32)cmd->cmnd[7] << 16) |
((u32)cmd->cmnd[8] << 8) |
(u32)cmd->cmnd[9];
#if MEGA_HAVE_STATS
if (*cmd->cmnd == READ_12) {
adapter->nreads[ldrv_num%0x80]++;
adapter->nreadblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
} else {
adapter->nwrites[ldrv_num%0x80]++;
adapter->nwriteblocks[ldrv_num%0x80] +=
mbox->m_out.numsectors;
}
#endif
}
/*
* If it is a read command
*/
if( (*cmd->cmnd & 0x0F) == 0x08 ) {
scb->dma_direction = DMA_FROM_DEVICE;
}
else {
scb->dma_direction = DMA_TO_DEVICE;
}
/* Calculate Scatter-Gather info */
mbox->m_out.numsgelements = mega_build_sglist(adapter, scb,
(u32 *)&mbox->m_out.xferaddr, &seg);
return scb;
#if MEGA_HAVE_CLUSTERING
case RESERVE:
case RELEASE:
/*
* Do we support clustering and is the support enabled
*/
if( ! adapter->has_cluster ) {
cmd->result = (DID_BAD_TARGET << 16);
scsi_done(cmd);
return NULL;
}
/* Allocate a SCB and initialize mailbox */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
scb->raw_mbox[0] = MEGA_CLUSTER_CMD;
scb->raw_mbox[2] = ( *cmd->cmnd == RESERVE ) ?
MEGA_RESERVE_LD : MEGA_RELEASE_LD;
scb->raw_mbox[3] = ldrv_num;
scb->dma_direction = DMA_NONE;
return scb;
#endif
default:
cmd->result = (DID_BAD_TARGET << 16);
scsi_done(cmd);
return NULL;
}
}
/*
* Passthru drive commands
*/
else {
/* Allocate a SCB and initialize passthru */
if(!(scb = mega_allocate_scb(adapter, cmd))) {
*busy = 1;
return NULL;
}
mbox = (mbox_t *)scb->raw_mbox;
memset(mbox, 0, sizeof(scb->raw_mbox));
if( adapter->support_ext_cdb ) {
mega_prepare_extpassthru(adapter, scb, cmd,
channel, target);
mbox->m_out.cmd = MEGA_MBOXCMD_EXTPTHRU;
mbox->m_out.xferaddr = scb->epthru_dma_addr;
}
else {
pthru = mega_prepare_passthru(adapter, scb, cmd,
channel, target);
/* Initialize mailbox */
if( adapter->has_64bit_addr ) {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU64;
}
else {
mbox->m_out.cmd = MEGA_MBOXCMD_PASSTHRU;
}
mbox->m_out.xferaddr = scb->pthru_dma_addr;
}
return scb;
}
return NULL;
}
/**
* mega_prepare_passthru()
* @adapter: pointer to our soft state
* @scb: our scsi control block
* @cmd: scsi command from the mid-layer
* @channel: actual channel on the controller
* @target: actual id on the controller.
*
* prepare a command for the scsi physical devices.
*/
static mega_passthru *
mega_prepare_passthru(adapter_t *adapter, scb_t *scb, struct scsi_cmnd *cmd,
int channel, int target)
{
mega_passthru *pthru;
pthru = scb->pthru;
memset(pthru, 0, sizeof (mega_passthru));
/* 0=6sec/1=60sec/2=10min/3=3hrs */
pthru->timeout = 2;
pthru->ars = 1;
pthru->reqsenselen = 14;
pthru->islogical = 0;
pthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
pthru->target = (adapter->flag & BOARD_40LD) ?
(channel << 4) | target : target;
pthru->cdblen = cmd->cmd_len;
pthru->logdrv = cmd->device->lun;
memcpy(pthru->cdb, cmd->cmnd, cmd->cmd_len);
/* Not sure about the direction */
scb->dma_direction = DMA_BIDIRECTIONAL;
/* Special Code for Handling READ_CAPA/ INQ using bounce buffers */
switch (cmd->cmnd[0]) {
case INQUIRY:
case READ_CAPACITY:
if(!(adapter->flag & (1L << cmd->device->channel))) {
dev_notice(&adapter->dev->dev,
"scsi%d: scanning scsi channel %d [P%d] "
"for physical devices\n",
adapter->host->host_no,
cmd->device->channel, channel);
adapter->flag |= (1L << cmd->device->channel);
}
fallthrough;
default:
pthru->numsgelements = mega_build_sglist(adapter, scb,
&pthru->dataxferaddr, &pthru->dataxferlen);
break;
}
return pthru;
}
/**
* mega_prepare_extpassthru()
* @adapter: pointer to our soft state
* @scb: our scsi control block
* @cmd: scsi command from the mid-layer
* @channel: actual channel on the controller
* @target: actual id on the controller.
*
* prepare a command for the scsi physical devices. This rountine prepares
* commands for devices which can take extended CDBs (>10 bytes)
*/
static mega_ext_passthru *
mega_prepare_extpassthru(adapter_t *adapter, scb_t *scb,
struct scsi_cmnd *cmd,
int channel, int target)
{
mega_ext_passthru *epthru;
epthru = scb->epthru;
memset(epthru, 0, sizeof(mega_ext_passthru));
/* 0=6sec/1=60sec/2=10min/3=3hrs */
epthru->timeout = 2;
epthru->ars = 1;
epthru->reqsenselen = 14;
epthru->islogical = 0;
epthru->channel = (adapter->flag & BOARD_40LD) ? 0 : channel;
epthru->target = (adapter->flag & BOARD_40LD) ?
(channel << 4) | target : target;
epthru->cdblen = cmd->cmd_len;
epthru->logdrv = cmd->device->lun;
memcpy(epthru->cdb, cmd->cmnd, cmd->cmd_len);
/* Not sure about the direction */
scb->dma_direction = DMA_BIDIRECTIONAL;
switch(cmd->cmnd[0]) {
case INQUIRY:
case READ_CAPACITY:
if(!(adapter->flag & (1L << cmd->device->channel))) {
dev_notice(&adapter->dev->dev,
"scsi%d: scanning scsi channel %d [P%d] "
"for physical devices\n",
adapter->host->host_no,
cmd->device->channel, channel);
adapter->flag |= (1L << cmd->device->channel);
}
fallthrough;
default:
epthru->numsgelements = mega_build_sglist(adapter, scb,
&epthru->dataxferaddr, &epthru->dataxferlen);
break;
}
return epthru;
}
static void
__mega_runpendq(adapter_t *adapter)
{
scb_t *scb;
struct list_head *pos, *next;
/* Issue any pending commands to the card */
list_for_each_safe(pos, next, &adapter->pending_list) {
scb = list_entry(pos, scb_t, list);
if( !(scb->state & SCB_ISSUED) ) {
if( issue_scb(adapter, scb) != 0 )
return;
}
}
return;
}
/**
* issue_scb()
* @adapter: pointer to our soft state
* @scb: scsi control block
*
* Post a command to the card if the mailbox is available, otherwise return
* busy. We also take the scb from the pending list if the mailbox is
* available.
*/
static int
issue_scb(adapter_t *adapter, scb_t *scb)
{
volatile mbox64_t *mbox64 = adapter->mbox64;
volatile mbox_t *mbox = adapter->mbox;
unsigned int i = 0;
if(unlikely(mbox->m_in.busy)) {
do {
udelay(1);
i++;
} while( mbox->m_in.busy && (i < max_mbox_busy_wait) );
if(mbox->m_in.busy) return -1;
}
/* Copy mailbox data into host structure */
memcpy((char *)&mbox->m_out, (char *)scb->raw_mbox,
sizeof(struct mbox_out));
mbox->m_out.cmdid = scb->idx; /* Set cmdid */
mbox->m_in.busy = 1; /* Set busy */
/*
* Increment the pending queue counter
*/
atomic_inc(&adapter->pend_cmds);
switch (mbox->m_out.cmd) {
case MEGA_MBOXCMD_LREAD64:
case MEGA_MBOXCMD_LWRITE64:
case MEGA_MBOXCMD_PASSTHRU64:
case MEGA_MBOXCMD_EXTPTHRU:
mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
mbox64->xfer_segment_hi = 0;
mbox->m_out.xferaddr = 0xFFFFFFFF;
break;
default:
mbox64->xfer_segment_lo = 0;
mbox64->xfer_segment_hi = 0;
}
/*
* post the command
*/
scb->state |= SCB_ISSUED;
if( likely(adapter->flag & BOARD_MEMMAP) ) {
mbox->m_in.poll = 0;
mbox->m_in.ack = 0;
WRINDOOR(adapter, adapter->mbox_dma | 0x1);
}
else {
irq_enable(adapter);
issue_command(adapter);
}
return 0;
}
/*
* Wait until the controller's mailbox is available
*/
static inline int
mega_busywait_mbox (adapter_t *adapter)
{
if (adapter->mbox->m_in.busy)
return __mega_busywait_mbox(adapter);
return 0;
}
/**
* issue_scb_block()
* @adapter: pointer to our soft state
* @raw_mbox: the mailbox
*
* Issue a scb in synchronous and non-interrupt mode
*/
static int
issue_scb_block(adapter_t *adapter, u_char *raw_mbox)
{
volatile mbox64_t *mbox64 = adapter->mbox64;
volatile mbox_t *mbox = adapter->mbox;
u8 byte;
/* Wait until mailbox is free */
if(mega_busywait_mbox (adapter))
goto bug_blocked_mailbox;
/* Copy mailbox data into host structure */
memcpy((char *) mbox, raw_mbox, sizeof(struct mbox_out));
mbox->m_out.cmdid = 0xFE;
mbox->m_in.busy = 1;
switch (raw_mbox[0]) {
case MEGA_MBOXCMD_LREAD64:
case MEGA_MBOXCMD_LWRITE64:
case MEGA_MBOXCMD_PASSTHRU64:
case MEGA_MBOXCMD_EXTPTHRU:
mbox64->xfer_segment_lo = mbox->m_out.xferaddr;
mbox64->xfer_segment_hi = 0;
mbox->m_out.xferaddr = 0xFFFFFFFF;
break;
default:
mbox64->xfer_segment_lo = 0;
mbox64->xfer_segment_hi = 0;
}
if( likely(adapter->flag & BOARD_MEMMAP) ) {
mbox->m_in.poll = 0;
mbox->m_in.ack = 0;
mbox->m_in.numstatus = 0xFF;
mbox->m_in.status = 0xFF;
WRINDOOR(adapter, adapter->mbox_dma | 0x1);
while((volatile u8)mbox->m_in.numstatus == 0xFF)
cpu_relax();
mbox->m_in.numstatus = 0xFF;
while( (volatile u8)mbox->m_in.poll != 0x77 )
cpu_relax();
mbox->m_in.poll = 0;
mbox->m_in.ack = 0x77;
WRINDOOR(adapter, adapter->mbox_dma | 0x2);
while(RDINDOOR(adapter) & 0x2)
cpu_relax();
}
else {
irq_disable(adapter);
issue_command(adapter);
while (!((byte = irq_state(adapter)) & INTR_VALID))
cpu_relax();
set_irq_state(adapter, byte);
irq_enable(adapter);
irq_ack(adapter);
}
return mbox->m_in.status;
bug_blocked_mailbox:
dev_warn(&adapter->dev->dev, "Blocked mailbox......!!\n");
udelay (1000);
return -1;
}
/**
* megaraid_isr_iomapped()
* @irq: irq
* @devp: pointer to our soft state
*
* Interrupt service routine for io-mapped controllers.
* Find out if our device is interrupting. If yes, acknowledge the interrupt
* and service the completed commands.
*/
static irqreturn_t
megaraid_isr_iomapped(int irq, void *devp)
{
adapter_t *adapter = devp;
unsigned long flags;
u8 status;
u8 nstatus;
u8 completed[MAX_FIRMWARE_STATUS];
u8 byte;
int handled = 0;
/*
* loop till F/W has more commands for us to complete.
*/
spin_lock_irqsave(&adapter->lock, flags);
do {
/* Check if a valid interrupt is pending */
byte = irq_state(adapter);
if( (byte & VALID_INTR_BYTE) == 0 ) {
/*
* No more pending commands
*/
goto out_unlock;
}
set_irq_state(adapter, byte);
while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
== 0xFF)
cpu_relax();
adapter->mbox->m_in.numstatus = 0xFF;
status = adapter->mbox->m_in.status;
/*
* decrement the pending queue counter
*/
atomic_sub(nstatus, &adapter->pend_cmds);
memcpy(completed, (void *)adapter->mbox->m_in.completed,
nstatus);
/* Acknowledge interrupt */
irq_ack(adapter);
mega_cmd_done(adapter, completed, nstatus, status);
mega_rundoneq(adapter);
handled = 1;
/* Loop through any pending requests */
if(atomic_read(&adapter->quiescent) == 0) {
mega_runpendq(adapter);
}
} while(1);
out_unlock:
spin_unlock_irqrestore(&adapter->lock, flags);
return IRQ_RETVAL(handled);
}
/**
* megaraid_isr_memmapped()
* @irq: irq
* @devp: pointer to our soft state
*
* Interrupt service routine for memory-mapped controllers.
* Find out if our device is interrupting. If yes, acknowledge the interrupt
* and service the completed commands.
*/
static irqreturn_t
megaraid_isr_memmapped(int irq, void *devp)
{
adapter_t *adapter = devp;
unsigned long flags;
u8 status;
u32 dword = 0;
u8 nstatus;
u8 completed[MAX_FIRMWARE_STATUS];
int handled = 0;
/*
* loop till F/W has more commands for us to complete.
*/
spin_lock_irqsave(&adapter->lock, flags);
do {
/* Check if a valid interrupt is pending */
dword = RDOUTDOOR(adapter);
if(dword != 0x10001234) {
/*
* No more pending commands
*/
goto out_unlock;
}
WROUTDOOR(adapter, 0x10001234);
while((nstatus = (volatile u8)adapter->mbox->m_in.numstatus)
== 0xFF) {
cpu_relax();
}
adapter->mbox->m_in.numstatus = 0xFF;
status = adapter->mbox->m_in.status;
/*
* decrement the pending queue counter
*/
atomic_sub(nstatus, &adapter->pend_cmds);
memcpy(completed, (void *)adapter->mbox->m_in.completed,
nstatus);
/* Acknowledge interrupt */
WRINDOOR(adapter, 0x2);
handled = 1;
while( RDINDOOR(adapter) & 0x02 )
cpu_relax();
mega_cmd_done(adapter, completed, nstatus, status);
mega_rundoneq(adapter);
/* Loop through any pending requests */
if(atomic_read(&adapter->quiescent) == 0) {
mega_runpendq(adapter);
}
} while(1);
out_unlock:
spin_unlock_irqrestore(&adapter->lock, flags);
return IRQ_RETVAL(handled);
}
/**
* mega_cmd_done()
* @adapter: pointer to our soft state
* @completed: array of ids of completed commands
* @nstatus: number of completed commands
* @status: status of the last command completed
*
* Complete the commands and call the scsi mid-layer callback hooks.
*/
static void
mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
{
mega_ext_passthru *epthru = NULL;
struct scatterlist *sgl;
struct scsi_cmnd *cmd = NULL;
mega_passthru *pthru = NULL;
mbox_t *mbox = NULL;
u8 c;
scb_t *scb;
int islogical;
int cmdid;
int i;
/*
* for all the commands completed, call the mid-layer callback routine
* and free the scb.
*/
for( i = 0; i < nstatus; i++ ) {
cmdid = completed[i];
/*
* Only free SCBs for the commands coming down from the
* mid-layer, not for which were issued internally
*
* For internal command, restore the status returned by the
* firmware so that user can interpret it.
*/
if (cmdid == CMDID_INT_CMDS) {
scb = &adapter->int_scb;
cmd = scb->cmd;
list_del_init(&scb->list);
scb->state = SCB_FREE;
adapter->int_status = status;
complete(&adapter->int_waitq);
} else {
scb = &adapter->scb_list[cmdid];
/*
* Make sure f/w has completed a valid command
*/
if( !(scb->state & SCB_ISSUED) || scb->cmd == NULL ) {
dev_crit(&adapter->dev->dev, "invalid command "
"Id %d, scb->state:%x, scsi cmd:%p\n",
cmdid, scb->state, scb->cmd);
continue;
}
/*
* Was a abort issued for this command
*/
if( scb->state & SCB_ABORT ) {
dev_warn(&adapter->dev->dev,
"aborted cmd [%x] complete\n",
scb->idx);
scb->cmd->result = (DID_ABORT << 16);
list_add_tail(SCSI_LIST(scb->cmd),
&adapter->completed_list);
mega_free_scb(adapter, scb);
continue;
}
/*
* Was a reset issued for this command
*/
if( scb->state & SCB_RESET ) {
dev_warn(&adapter->dev->dev,
"reset cmd [%x] complete\n",
scb->idx);
scb->cmd->result = (DID_RESET << 16);
list_add_tail(SCSI_LIST(scb->cmd),
&adapter->completed_list);
mega_free_scb (adapter, scb);
continue;
}
cmd = scb->cmd;
pthru = scb->pthru;
epthru = scb->epthru;
mbox = (mbox_t *)scb->raw_mbox;
#if MEGA_HAVE_STATS
{
int logdrv = mbox->m_out.logdrv;
islogical = adapter->logdrv_chan[cmd->channel];
/*
* Maintain an error counter for the logical drive.
* Some application like SNMP agent need such
* statistics
*/
if( status && islogical && (cmd->cmnd[0] == READ_6 ||
cmd->cmnd[0] == READ_10 ||
cmd->cmnd[0] == READ_12)) {
/*
* Logical drive number increases by 0x80 when
* a logical drive is deleted
*/
adapter->rd_errors[logdrv%0x80]++;
}
if( status && islogical && (cmd->cmnd[0] == WRITE_6 ||
cmd->cmnd[0] == WRITE_10 ||
cmd->cmnd[0] == WRITE_12)) {
/*
* Logical drive number increases by 0x80 when
* a logical drive is deleted
*/
adapter->wr_errors[logdrv%0x80]++;
}
}
#endif
}
/*
* Do not return the presence of hard disk on the channel so,
* inquiry sent, and returned data==hard disk or removable
* hard disk and not logical, request should return failure! -
* PJ
*/
islogical = adapter->logdrv_chan[cmd->device->channel];
if( cmd->cmnd[0] == INQUIRY && !islogical ) {
sgl = scsi_sglist(cmd);
if( sg_page(sgl) ) {
c = *(unsigned char *) sg_virt(&sgl[0]);
} else {
dev_warn(&adapter->dev->dev, "invalid sg\n");
c = 0;
}
if(IS_RAID_CH(adapter, cmd->device->channel) &&
((c & 0x1F ) == TYPE_DISK)) {
status = 0xF0;
}
}
/* clear result; otherwise, success returns corrupt value */
cmd->result = 0;
/* Convert MegaRAID status to Linux error code */
switch (status) {
case 0x00: /* SUCCESS , i.e. SCSI_STATUS_GOOD */
cmd->result |= (DID_OK << 16);
break;
case 0x02: /* ERROR_ABORTED, i.e.
SCSI_STATUS_CHECK_CONDITION */
/* set sense_buffer and result fields */
if( mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU ||
mbox->m_out.cmd == MEGA_MBOXCMD_PASSTHRU64 ) {
memcpy(cmd->sense_buffer, pthru->reqsensearea,
14);
cmd->result = SAM_STAT_CHECK_CONDITION;
}
else {
if (mbox->m_out.cmd == MEGA_MBOXCMD_EXTPTHRU) {
memcpy(cmd->sense_buffer,
epthru->reqsensearea, 14);
cmd->result = SAM_STAT_CHECK_CONDITION;
} else
scsi_build_sense(cmd, 0,
ABORTED_COMMAND, 0, 0);
}
break;
case 0x08: /* ERR_DEST_DRIVE_FAILED, i.e.
SCSI_STATUS_BUSY */
cmd->result |= (DID_BUS_BUSY << 16) | status;
break;
default:
#if MEGA_HAVE_CLUSTERING
/*
* If TEST_UNIT_READY fails, we know
* MEGA_RESERVATION_STATUS failed
*/
if( cmd->cmnd[0] == TEST_UNIT_READY ) {
cmd->result |= (DID_ERROR << 16) |
SAM_STAT_RESERVATION_CONFLICT;
}
else
/*
* Error code returned is 1 if Reserve or Release
* failed or the input parameter is invalid
*/
if( status == 1 &&
(cmd->cmnd[0] == RESERVE ||
cmd->cmnd[0] == RELEASE) ) {
cmd->result |= (DID_ERROR << 16) |
SAM_STAT_RESERVATION_CONFLICT;
}
else
#endif
cmd->result |= (DID_BAD_TARGET << 16)|status;
}
mega_free_scb(adapter, scb);
/* Add Scsi_Command to end of completed queue */
list_add_tail(SCSI_LIST(cmd), &adapter->completed_list);
}
}
/*
* mega_runpendq()
*
* Run through the list of completed requests and finish it
*/
static void
mega_rundoneq (adapter_t *adapter)
{
struct megaraid_cmd_priv *cmd_priv;
list_for_each_entry(cmd_priv, &adapter->completed_list, entry)
scsi_done(megaraid_to_scsi_cmd(cmd_priv));
INIT_LIST_HEAD(&adapter->completed_list);
}
/*
* Free a SCB structure
* Note: We assume the scsi commands associated with this scb is not free yet.
*/
static void
mega_free_scb(adapter_t *adapter, scb_t *scb)
{
switch( scb->dma_type ) {
case MEGA_DMA_TYPE_NONE:
break;
case MEGA_SGLIST:
scsi_dma_unmap(scb->cmd);
break;
default:
break;
}
/*
* Remove from the pending list
*/
list_del_init(&scb->list);
/* Link the scb back into free list */
scb->state = SCB_FREE;
scb->cmd = NULL;
list_add(&scb->list, &adapter->free_list);
}
static int
__mega_busywait_mbox (adapter_t *adapter)
{
volatile mbox_t *mbox = adapter->mbox;
long counter;
for (counter = 0; counter < 10000; counter++) {
if (!mbox->m_in.busy)
return 0;
udelay(100);
cond_resched();
}
return -1; /* give up after 1 second */
}
/*
* Copies data to SGLIST
* Note: For 64 bit cards, we need a minimum of one SG element for read/write
*/
static int
mega_build_sglist(adapter_t *adapter, scb_t *scb, u32 *buf, u32 *len)
{
struct scatterlist *sg;
struct scsi_cmnd *cmd;
int sgcnt;
int idx;
cmd = scb->cmd;
/*
* Copy Scatter-Gather list info into controller structure.
*
* The number of sg elements returned must not exceed our limit
*/
sgcnt = scsi_dma_map(cmd);
scb->dma_type = MEGA_SGLIST;
BUG_ON(sgcnt > adapter->sglen || sgcnt < 0);
*len = 0;
if (scsi_sg_count(cmd) == 1 && !adapter->has_64bit_addr) {
sg = scsi_sglist(cmd);
scb->dma_h_bulkdata = sg_dma_address(sg);
*buf = (u32)scb->dma_h_bulkdata;
*len = sg_dma_len(sg);
return 0;
}
scsi_for_each_sg(cmd, sg, sgcnt, idx) {
if (adapter->has_64bit_addr) {
scb->sgl64[idx].address = sg_dma_address(sg);
*len += scb->sgl64[idx].length = sg_dma_len(sg);
} else {
scb->sgl[idx].address = sg_dma_address(sg);
*len += scb->sgl[idx].length = sg_dma_len(sg);
}
}
/* Reset pointer and length fields */
*buf = scb->sgl_dma_addr;
/* Return count of SG requests */
return sgcnt;
}
/*
* mega_8_to_40ld()
*
* takes all info in AdapterInquiry structure and puts it into ProductInfo and
* Enquiry3 structures for later use
*/
static void
mega_8_to_40ld(mraid_inquiry *inquiry, mega_inquiry3 *enquiry3,
mega_product_info *product_info)
{
int i;
product_info->max_commands = inquiry->adapter_info.max_commands;
enquiry3->rebuild_rate = inquiry->adapter_info.rebuild_rate;
product_info->nchannels = inquiry->adapter_info.nchannels;
for (i = 0; i < 4; i++) {
product_info->fw_version[i] =
inquiry->adapter_info.fw_version[i];
product_info->bios_version[i] =
inquiry->adapter_info.bios_version[i];
}
enquiry3->cache_flush_interval =
inquiry->adapter_info.cache_flush_interval;
product_info->dram_size = inquiry->adapter_info.dram_size;
enquiry3->num_ldrv = inquiry->logdrv_info.num_ldrv;
for (i = 0; i < MAX_LOGICAL_DRIVES_8LD; i++) {
enquiry3->ldrv_size[i] = inquiry->logdrv_info.ldrv_size[i];
enquiry3->ldrv_prop[i] = inquiry->logdrv_info.ldrv_prop[i];
enquiry3->ldrv_state[i] = inquiry->logdrv_info.ldrv_state[i];
}
for (i = 0; i < (MAX_PHYSICAL_DRIVES); i++)
enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
}
static inline void
mega_free_sgl(adapter_t *adapter)
{
scb_t *scb;
int i;
for(i = 0; i < adapter->max_cmds; i++) {
scb = &adapter->scb_list[i];
if( scb->sgl64 ) {
dma_free_coherent(&adapter->dev->dev,
sizeof(mega_sgl64) * adapter->sglen,
scb->sgl64, scb->sgl_dma_addr);
scb->sgl64 = NULL;
}
if( scb->pthru ) {
dma_free_coherent(&adapter->dev->dev,
sizeof(mega_passthru), scb->pthru,
scb->pthru_dma_addr);
scb->pthru = NULL;
}
if( scb->epthru ) {
dma_free_coherent(&adapter->dev->dev,
sizeof(mega_ext_passthru),
scb->epthru, scb->epthru_dma_addr);
scb->epthru = NULL;
}
}
}
/*
* Get information about the card/driver
*/
const char *
megaraid_info(struct Scsi_Host *host)
{
static char buffer[512];
adapter_t *adapter;
adapter = (adapter_t *)host->hostdata;
sprintf (buffer,
"LSI Logic MegaRAID %s %d commands %d targs %d chans %d luns",
adapter->fw_version, adapter->product_info.max_commands,
adapter->host->max_id, adapter->host->max_channel,
(u32)adapter->host->max_lun);
return buffer;
}
/*
* Abort a previous SCSI request. Only commands on the pending list can be
* aborted. All the commands issued to the F/W must complete.
*/
static int
megaraid_abort(struct scsi_cmnd *cmd)
{
adapter_t *adapter;
int rval;
adapter = (adapter_t *)cmd->device->host->hostdata;
rval = megaraid_abort_and_reset(adapter, cmd, SCB_ABORT);
/*
* This is required here to complete any completed requests
* to be communicated over to the mid layer.
*/
mega_rundoneq(adapter);
return rval;
}
static int
megaraid_reset(struct scsi_cmnd *cmd)
{
adapter_t *adapter;
megacmd_t mc;
int rval;
adapter = (adapter_t *)cmd->device->host->hostdata;
#if MEGA_HAVE_CLUSTERING
mc.cmd = MEGA_CLUSTER_CMD;
mc.opcode = MEGA_RESET_RESERVATIONS;
if( mega_internal_command(adapter, &mc, NULL) != 0 ) {
dev_warn(&adapter->dev->dev, "reservation reset failed\n");
}
else {
dev_info(&adapter->dev->dev, "reservation reset\n");
}
#endif
spin_lock_irq(&adapter->lock);
rval = megaraid_abort_and_reset(adapter, cmd, SCB_RESET);
/*
* This is required here to complete any completed requests
* to be communicated over to the mid layer.
*/
mega_rundoneq(adapter);
spin_unlock_irq(&adapter->lock);
return rval;
}
/**
* megaraid_abort_and_reset()
* @adapter: megaraid soft state
* @cmd: scsi command to be aborted or reset
* @aor: abort or reset flag
*
* Try to locate the scsi command in the pending queue. If found and is not
* issued to the controller, abort/reset it. Otherwise return failure
*/
static int
megaraid_abort_and_reset(adapter_t *adapter, struct scsi_cmnd *cmd, int aor)
{
struct list_head *pos, *next;
scb_t *scb;
dev_warn(&adapter->dev->dev, "%s cmd=%x <c=%d t=%d l=%d>\n",
(aor == SCB_ABORT)? "ABORTING":"RESET",
cmd->cmnd[0], cmd->device->channel,
cmd->device->id, (u32)cmd->device->lun);
if(list_empty(&adapter->pending_list))
return FAILED;
list_for_each_safe(pos, next, &adapter->pending_list) {
scb = list_entry(pos, scb_t, list);
if (scb->cmd == cmd) { /* Found command */
scb->state |= aor;
/*
* Check if this command has firmware ownership. If
* yes, we cannot reset this command. Whenever f/w
* completes this command, we will return appropriate
* status from ISR.
*/
if( scb->state & SCB_ISSUED ) {
dev_warn(&adapter->dev->dev,
"%s[%x], fw owner\n",
(aor==SCB_ABORT) ? "ABORTING":"RESET",
scb->idx);
return FAILED;
}
else {
/*
* Not yet issued! Remove from the pending
* list
*/
dev_warn(&adapter->dev->dev,
"%s-[%x], driver owner\n",
(aor==SCB_ABORT) ? "ABORTING":"RESET",
scb->idx);
mega_free_scb(adapter, scb);
if( aor == SCB_ABORT ) {
cmd->result = (DID_ABORT << 16);
}
else {
cmd->result = (DID_RESET << 16);
}
list_add_tail(SCSI_LIST(cmd),
&adapter->completed_list);
return SUCCESS;
}
}
}
return FAILED;
}
static inline int
make_local_pdev(adapter_t *adapter, struct pci_dev **pdev)
{
*pdev = pci_alloc_dev(NULL);
if( *pdev == NULL ) return -1;
memcpy(*pdev, adapter->dev, sizeof(struct pci_dev));
if (dma_set_mask(&(*pdev)->dev, DMA_BIT_MASK(32)) != 0) {
kfree(*pdev);
return -1;
}
return 0;
}
static inline void
free_local_pdev(struct pci_dev *pdev)
{
kfree(pdev);
}
/**
* mega_allocate_inquiry()
* @dma_handle: handle returned for dma address
* @pdev: handle to pci device
*
* allocates memory for inquiry structure
*/
static inline void *
mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
{
return dma_alloc_coherent(&pdev->dev, sizeof(mega_inquiry3),
dma_handle, GFP_KERNEL);
}
static inline void
mega_free_inquiry(void *inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
{
dma_free_coherent(&pdev->dev, sizeof(mega_inquiry3), inquiry,
dma_handle);
}
#ifdef CONFIG_PROC_FS
/* Following code handles /proc fs */
/**
* proc_show_config()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display configuration information about the controller.
*/
static int
proc_show_config(struct seq_file *m, void *v)
{
adapter_t *adapter = m->private;
seq_puts(m, MEGARAID_VERSION);
if(adapter->product_info.product_name[0])
seq_printf(m, "%s\n", adapter->product_info.product_name);
seq_puts(m, "Controller Type: ");
if( adapter->flag & BOARD_MEMMAP )
seq_puts(m, "438/466/467/471/493/518/520/531/532\n");
else
seq_puts(m, "418/428/434\n");
if(adapter->flag & BOARD_40LD)
seq_puts(m, "Controller Supports 40 Logical Drives\n");
if(adapter->flag & BOARD_64BIT)
seq_puts(m, "Controller capable of 64-bit memory addressing\n");
if( adapter->has_64bit_addr )
seq_puts(m, "Controller using 64-bit memory addressing\n");
else
seq_puts(m, "Controller is not using 64-bit memory addressing\n");
seq_printf(m, "Base = %08lx, Irq = %d, ",
adapter->base, adapter->host->irq);
seq_printf(m, "Logical Drives = %d, Channels = %d\n",
adapter->numldrv, adapter->product_info.nchannels);
seq_printf(m, "Version =%s:%s, DRAM = %dMb\n",
adapter->fw_version, adapter->bios_version,
adapter->product_info.dram_size);
seq_printf(m, "Controller Queue Depth = %d, Driver Queue Depth = %d\n",
adapter->product_info.max_commands, adapter->max_cmds);
seq_printf(m, "support_ext_cdb = %d\n", adapter->support_ext_cdb);
seq_printf(m, "support_random_del = %d\n", adapter->support_random_del);
seq_printf(m, "boot_ldrv_enabled = %d\n", adapter->boot_ldrv_enabled);
seq_printf(m, "boot_ldrv = %d\n", adapter->boot_ldrv);
seq_printf(m, "boot_pdrv_enabled = %d\n", adapter->boot_pdrv_enabled);
seq_printf(m, "boot_pdrv_ch = %d\n", adapter->boot_pdrv_ch);
seq_printf(m, "boot_pdrv_tgt = %d\n", adapter->boot_pdrv_tgt);
seq_printf(m, "quiescent = %d\n",
atomic_read(&adapter->quiescent));
seq_printf(m, "has_cluster = %d\n", adapter->has_cluster);
seq_puts(m, "\nModule Parameters:\n");
seq_printf(m, "max_cmd_per_lun = %d\n", max_cmd_per_lun);
seq_printf(m, "max_sectors_per_io = %d\n", max_sectors_per_io);
return 0;
}
/**
* proc_show_stat()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display statistical information about the I/O activity.
*/
static int
proc_show_stat(struct seq_file *m, void *v)
{
adapter_t *adapter = m->private;
#if MEGA_HAVE_STATS
int i;
#endif
seq_puts(m, "Statistical Information for this controller\n");
seq_printf(m, "pend_cmds = %d\n", atomic_read(&adapter->pend_cmds));
#if MEGA_HAVE_STATS
for(i = 0; i < adapter->numldrv; i++) {
seq_printf(m, "Logical Drive %d:\n", i);
seq_printf(m, "\tReads Issued = %lu, Writes Issued = %lu\n",
adapter->nreads[i], adapter->nwrites[i]);
seq_printf(m, "\tSectors Read = %lu, Sectors Written = %lu\n",
adapter->nreadblocks[i], adapter->nwriteblocks[i]);
seq_printf(m, "\tRead errors = %lu, Write errors = %lu\n\n",
adapter->rd_errors[i], adapter->wr_errors[i]);
}
#else
seq_puts(m, "IO and error counters not compiled in driver.\n");
#endif
return 0;
}
/**
* proc_show_mbox()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display mailbox information for the last command issued. This information
* is good for debugging.
*/
static int
proc_show_mbox(struct seq_file *m, void *v)
{
adapter_t *adapter = m->private;
volatile mbox_t *mbox = adapter->mbox;
seq_puts(m, "Contents of Mail Box Structure\n");
seq_printf(m, " Fw Command = 0x%02x\n", mbox->m_out.cmd);
seq_printf(m, " Cmd Sequence = 0x%02x\n", mbox->m_out.cmdid);
seq_printf(m, " No of Sectors= %04d\n", mbox->m_out.numsectors);
seq_printf(m, " LBA = 0x%02x\n", mbox->m_out.lba);
seq_printf(m, " DTA = 0x%08x\n", mbox->m_out.xferaddr);
seq_printf(m, " Logical Drive= 0x%02x\n", mbox->m_out.logdrv);
seq_printf(m, " No of SG Elmt= 0x%02x\n", mbox->m_out.numsgelements);
seq_printf(m, " Busy = %01x\n", mbox->m_in.busy);
seq_printf(m, " Status = 0x%02x\n", mbox->m_in.status);
return 0;
}
/**
* proc_show_rebuild_rate()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display current rebuild rate
*/
static int
proc_show_rebuild_rate(struct seq_file *m, void *v)
{
adapter_t *adapter = m->private;
dma_addr_t dma_handle;
caddr_t inquiry;
struct pci_dev *pdev;
if( make_local_pdev(adapter, &pdev) != 0 )
return 0;
if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
goto free_pdev;
if( mega_adapinq(adapter, dma_handle) != 0 ) {
seq_puts(m, "Adapter inquiry failed.\n");
dev_warn(&adapter->dev->dev, "inquiry failed\n");
goto free_inquiry;
}
if( adapter->flag & BOARD_40LD )
seq_printf(m, "Rebuild Rate: [%d%%]\n",
((mega_inquiry3 *)inquiry)->rebuild_rate);
else
seq_printf(m, "Rebuild Rate: [%d%%]\n",
((mraid_ext_inquiry *)
inquiry)->raid_inq.adapter_info.rebuild_rate);
free_inquiry:
mega_free_inquiry(inquiry, dma_handle, pdev);
free_pdev:
free_local_pdev(pdev);
return 0;
}
/**
* proc_show_battery()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display information about the battery module on the controller.
*/
static int
proc_show_battery(struct seq_file *m, void *v)
{
adapter_t *adapter = m->private;
dma_addr_t dma_handle;
caddr_t inquiry;
struct pci_dev *pdev;
u8 battery_status;
if( make_local_pdev(adapter, &pdev) != 0 )
return 0;
if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
goto free_pdev;
if( mega_adapinq(adapter, dma_handle) != 0 ) {
seq_puts(m, "Adapter inquiry failed.\n");
dev_warn(&adapter->dev->dev, "inquiry failed\n");
goto free_inquiry;
}
if( adapter->flag & BOARD_40LD ) {
battery_status = ((mega_inquiry3 *)inquiry)->battery_status;
}
else {
battery_status = ((mraid_ext_inquiry *)inquiry)->
raid_inq.adapter_info.battery_status;
}
/*
* Decode the battery status
*/
seq_printf(m, "Battery Status:[%d]", battery_status);
if(battery_status == MEGA_BATT_CHARGE_DONE)
seq_puts(m, " Charge Done");
if(battery_status & MEGA_BATT_MODULE_MISSING)
seq_puts(m, " Module Missing");
if(battery_status & MEGA_BATT_LOW_VOLTAGE)
seq_puts(m, " Low Voltage");
if(battery_status & MEGA_BATT_TEMP_HIGH)
seq_puts(m, " Temperature High");
if(battery_status & MEGA_BATT_PACK_MISSING)
seq_puts(m, " Pack Missing");
if(battery_status & MEGA_BATT_CHARGE_INPROG)
seq_puts(m, " Charge In-progress");
if(battery_status & MEGA_BATT_CHARGE_FAIL)
seq_puts(m, " Charge Fail");
if(battery_status & MEGA_BATT_CYCLES_EXCEEDED)
seq_puts(m, " Cycles Exceeded");
seq_putc(m, '\n');
free_inquiry:
mega_free_inquiry(inquiry, dma_handle, pdev);
free_pdev:
free_local_pdev(pdev);
return 0;
}
/*
* Display scsi inquiry
*/
static void
mega_print_inquiry(struct seq_file *m, char *scsi_inq)
{
int i;
seq_puts(m, " Vendor: ");
seq_write(m, scsi_inq + 8, 8);
seq_puts(m, " Model: ");
seq_write(m, scsi_inq + 16, 16);
seq_puts(m, " Rev: ");
seq_write(m, scsi_inq + 32, 4);
seq_putc(m, '\n');
i = scsi_inq[0] & 0x1f;
seq_printf(m, " Type: %s ", scsi_device_type(i));
seq_printf(m, " ANSI SCSI revision: %02x",
scsi_inq[2] & 0x07);
if( (scsi_inq[2] & 0x07) == 1 && (scsi_inq[3] & 0x0f) == 1 )
seq_puts(m, " CCS\n");
else
seq_putc(m, '\n');
}
/**
* proc_show_pdrv()
* @m: Synthetic file construction data
* @adapter: pointer to our soft state
* @channel: channel
*
* Display information about the physical drives.
*/
static int
proc_show_pdrv(struct seq_file *m, adapter_t *adapter, int channel)
{
dma_addr_t dma_handle;
char *scsi_inq;
dma_addr_t scsi_inq_dma_handle;
caddr_t inquiry;
struct pci_dev *pdev;
u8 *pdrv_state;
u8 state;
int tgt;
int max_channels;
int i;
if( make_local_pdev(adapter, &pdev) != 0 )
return 0;
if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
goto free_pdev;
if( mega_adapinq(adapter, dma_handle) != 0 ) {
seq_puts(m, "Adapter inquiry failed.\n");
dev_warn(&adapter->dev->dev, "inquiry failed\n");
goto free_inquiry;
}
scsi_inq = dma_alloc_coherent(&pdev->dev, 256, &scsi_inq_dma_handle,
GFP_KERNEL);
if( scsi_inq == NULL ) {
seq_puts(m, "memory not available for scsi inq.\n");
goto free_inquiry;
}
if( adapter->flag & BOARD_40LD ) {
pdrv_state = ((mega_inquiry3 *)inquiry)->pdrv_state;
}
else {
pdrv_state = ((mraid_ext_inquiry *)inquiry)->
raid_inq.pdrv_info.pdrv_state;
}
max_channels = adapter->product_info.nchannels;
if( channel >= max_channels ) {
goto free_pci;
}
for( tgt = 0; tgt <= MAX_TARGET; tgt++ ) {
i = channel*16 + tgt;
state = *(pdrv_state + i);
switch( state & 0x0F ) {
case PDRV_ONLINE:
seq_printf(m, "Channel:%2d Id:%2d State: Online",
channel, tgt);
break;
case PDRV_FAILED:
seq_printf(m, "Channel:%2d Id:%2d State: Failed",
channel, tgt);
break;
case PDRV_RBLD:
seq_printf(m, "Channel:%2d Id:%2d State: Rebuild",
channel, tgt);
break;
case PDRV_HOTSPARE:
seq_printf(m, "Channel:%2d Id:%2d State: Hot spare",
channel, tgt);
break;
default:
seq_printf(m, "Channel:%2d Id:%2d State: Un-configured",
channel, tgt);
break;
}
/*
* This interface displays inquiries for disk drives
* only. Inquries for logical drives and non-disk
* devices are available through /proc/scsi/scsi
*/
memset(scsi_inq, 0, 256);
if( mega_internal_dev_inquiry(adapter, channel, tgt,
scsi_inq_dma_handle) ||
(scsi_inq[0] & 0x1F) != TYPE_DISK ) {
continue;
}
/*
* Check for overflow. We print less than 240
* characters for inquiry
*/
seq_puts(m, ".\n");
mega_print_inquiry(m, scsi_inq);
}
free_pci:
dma_free_coherent(&pdev->dev, 256, scsi_inq, scsi_inq_dma_handle);
free_inquiry:
mega_free_inquiry(inquiry, dma_handle, pdev);
free_pdev:
free_local_pdev(pdev);
return 0;
}
/**
* proc_show_pdrv_ch0()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display information about the physical drives on physical channel 0.
*/
static int
proc_show_pdrv_ch0(struct seq_file *m, void *v)
{
return proc_show_pdrv(m, m->private, 0);
}
/**
* proc_show_pdrv_ch1()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display information about the physical drives on physical channel 1.
*/
static int
proc_show_pdrv_ch1(struct seq_file *m, void *v)
{
return proc_show_pdrv(m, m->private, 1);
}
/**
* proc_show_pdrv_ch2()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display information about the physical drives on physical channel 2.
*/
static int
proc_show_pdrv_ch2(struct seq_file *m, void *v)
{
return proc_show_pdrv(m, m->private, 2);
}
/**
* proc_show_pdrv_ch3()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display information about the physical drives on physical channel 3.
*/
static int
proc_show_pdrv_ch3(struct seq_file *m, void *v)
{
return proc_show_pdrv(m, m->private, 3);
}
/**
* proc_show_rdrv()
* @m: Synthetic file construction data
* @adapter: pointer to our soft state
* @start: starting logical drive to display
* @end: ending logical drive to display
*
* We do not print the inquiry information since its already available through
* /proc/scsi/scsi interface
*/
static int
proc_show_rdrv(struct seq_file *m, adapter_t *adapter, int start, int end )
{
dma_addr_t dma_handle;
logdrv_param *lparam;
megacmd_t mc;
char *disk_array;
dma_addr_t disk_array_dma_handle;
caddr_t inquiry;
struct pci_dev *pdev;
u8 *rdrv_state;
int num_ldrv;
u32 array_sz;
int i;
if( make_local_pdev(adapter, &pdev) != 0 )
return 0;
if( (inquiry = mega_allocate_inquiry(&dma_handle, pdev)) == NULL )
goto free_pdev;
if( mega_adapinq(adapter, dma_handle) != 0 ) {
seq_puts(m, "Adapter inquiry failed.\n");
dev_warn(&adapter->dev->dev, "inquiry failed\n");
goto free_inquiry;
}
memset(&mc, 0, sizeof(megacmd_t));
if( adapter->flag & BOARD_40LD ) {
array_sz = sizeof(disk_array_40ld);
rdrv_state = ((mega_inquiry3 *)inquiry)->ldrv_state;
num_ldrv = ((mega_inquiry3 *)inquiry)->num_ldrv;
}
else {
array_sz = sizeof(disk_array_8ld);
rdrv_state = ((mraid_ext_inquiry *)inquiry)->
raid_inq.logdrv_info.ldrv_state;
num_ldrv = ((mraid_ext_inquiry *)inquiry)->
raid_inq.logdrv_info.num_ldrv;
}
disk_array = dma_alloc_coherent(&pdev->dev, array_sz,
&disk_array_dma_handle, GFP_KERNEL);
if( disk_array == NULL ) {
seq_puts(m, "memory not available.\n");
goto free_inquiry;
}
mc.xferaddr = (u32)disk_array_dma_handle;
if( adapter->flag & BOARD_40LD ) {
mc.cmd = FC_NEW_CONFIG;
mc.opcode = OP_DCMD_READ_CONFIG;
if( mega_internal_command(adapter, &mc, NULL) ) {
seq_puts(m, "40LD read config failed.\n");
goto free_pci;
}
}
else {
mc.cmd = NEW_READ_CONFIG_8LD;
if( mega_internal_command(adapter, &mc, NULL) ) {
mc.cmd = READ_CONFIG_8LD;
if( mega_internal_command(adapter, &mc, NULL) ) {
seq_puts(m, "8LD read config failed.\n");
goto free_pci;
}
}
}
for( i = start; i < ( (end+1 < num_ldrv) ? end+1 : num_ldrv ); i++ ) {
if( adapter->flag & BOARD_40LD ) {
lparam =
&((disk_array_40ld *)disk_array)->ldrv[i].lparam;
}
else {
lparam =
&((disk_array_8ld *)disk_array)->ldrv[i].lparam;
}
/*
* Check for overflow. We print less than 240 characters for
* information about each logical drive.
*/
seq_printf(m, "Logical drive:%2d:, ", i);
switch( rdrv_state[i] & 0x0F ) {
case RDRV_OFFLINE:
seq_puts(m, "state: offline");
break;
case RDRV_DEGRADED:
seq_puts(m, "state: degraded");
break;
case RDRV_OPTIMAL:
seq_puts(m, "state: optimal");
break;
case RDRV_DELETED:
seq_puts(m, "state: deleted");
break;
default:
seq_puts(m, "state: unknown");
break;
}
/*
* Check if check consistency or initialization is going on
* for this logical drive.
*/
if( (rdrv_state[i] & 0xF0) == 0x20 )
seq_puts(m, ", check-consistency in progress");
else if( (rdrv_state[i] & 0xF0) == 0x10 )
seq_puts(m, ", initialization in progress");
seq_putc(m, '\n');
seq_printf(m, "Span depth:%3d, ", lparam->span_depth);
seq_printf(m, "RAID level:%3d, ", lparam->level);
seq_printf(m, "Stripe size:%3d, ",
lparam->stripe_sz ? lparam->stripe_sz/2: 128);
seq_printf(m, "Row size:%3d\n", lparam->row_size);
seq_puts(m, "Read Policy: ");
switch(lparam->read_ahead) {
case NO_READ_AHEAD:
seq_puts(m, "No read ahead, ");
break;
case READ_AHEAD:
seq_puts(m, "Read ahead, ");
break;
case ADAP_READ_AHEAD:
seq_puts(m, "Adaptive, ");
break;
}
seq_puts(m, "Write Policy: ");
switch(lparam->write_mode) {
case WRMODE_WRITE_THRU:
seq_puts(m, "Write thru, ");
break;
case WRMODE_WRITE_BACK:
seq_puts(m, "Write back, ");
break;
}
seq_puts(m, "Cache Policy: ");
switch(lparam->direct_io) {
case CACHED_IO:
seq_puts(m, "Cached IO\n\n");
break;
case DIRECT_IO:
seq_puts(m, "Direct IO\n\n");
break;
}
}
free_pci:
dma_free_coherent(&pdev->dev, array_sz, disk_array,
disk_array_dma_handle);
free_inquiry:
mega_free_inquiry(inquiry, dma_handle, pdev);
free_pdev:
free_local_pdev(pdev);
return 0;
}
/**
* proc_show_rdrv_10()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display real time information about the logical drives 0 through 9.
*/
static int
proc_show_rdrv_10(struct seq_file *m, void *v)
{
return proc_show_rdrv(m, m->private, 0, 9);
}
/**
* proc_show_rdrv_20()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display real time information about the logical drives 0 through 9.
*/
static int
proc_show_rdrv_20(struct seq_file *m, void *v)
{
return proc_show_rdrv(m, m->private, 10, 19);
}
/**
* proc_show_rdrv_30()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display real time information about the logical drives 0 through 9.
*/
static int
proc_show_rdrv_30(struct seq_file *m, void *v)
{
return proc_show_rdrv(m, m->private, 20, 29);
}
/**
* proc_show_rdrv_40()
* @m: Synthetic file construction data
* @v: File iterator
*
* Display real time information about the logical drives 0 through 9.
*/
static int
proc_show_rdrv_40(struct seq_file *m, void *v)
{
return proc_show_rdrv(m, m->private, 30, 39);
}
/**
* mega_create_proc_entry()
* @index: index in soft state array
* @parent: parent node for this /proc entry
*
* Creates /proc entries for our controllers.
*/
static void
mega_create_proc_entry(int index, struct proc_dir_entry *parent)
{
adapter_t *adapter = hba_soft_state[index];
struct proc_dir_entry *dir;
u8 string[16];
sprintf(string, "hba%d", adapter->host->host_no);
dir = proc_mkdir_data(string, 0, parent, adapter);
if (!dir) {
dev_warn(&adapter->dev->dev, "proc_mkdir failed\n");
return;
}
proc_create_single_data("config", S_IRUSR, dir,
proc_show_config, adapter);
proc_create_single_data("stat", S_IRUSR, dir,
proc_show_stat, adapter);
proc_create_single_data("mailbox", S_IRUSR, dir,
proc_show_mbox, adapter);
#if MEGA_HAVE_ENH_PROC
proc_create_single_data("rebuild-rate", S_IRUSR, dir,
proc_show_rebuild_rate, adapter);
proc_create_single_data("battery-status", S_IRUSR, dir,
proc_show_battery, adapter);
proc_create_single_data("diskdrives-ch0", S_IRUSR, dir,
proc_show_pdrv_ch0, adapter);
proc_create_single_data("diskdrives-ch1", S_IRUSR, dir,
proc_show_pdrv_ch1, adapter);
proc_create_single_data("diskdrives-ch2", S_IRUSR, dir,
proc_show_pdrv_ch2, adapter);
proc_create_single_data("diskdrives-ch3", S_IRUSR, dir,
proc_show_pdrv_ch3, adapter);
proc_create_single_data("raiddrives-0-9", S_IRUSR, dir,
proc_show_rdrv_10, adapter);
proc_create_single_data("raiddrives-10-19", S_IRUSR, dir,
proc_show_rdrv_20, adapter);
proc_create_single_data("raiddrives-20-29", S_IRUSR, dir,
proc_show_rdrv_30, adapter);
proc_create_single_data("raiddrives-30-39", S_IRUSR, dir,
proc_show_rdrv_40, adapter);
#endif
}
#else
static inline void mega_create_proc_entry(int index, struct proc_dir_entry *parent)
{
}
#endif
/*
* megaraid_biosparam()
*
* Return the disk geometry for a particular disk
*/
static int
megaraid_biosparam(struct scsi_device *sdev, struct block_device *bdev,
sector_t capacity, int geom[])
{
adapter_t *adapter;
int heads;
int sectors;
int cylinders;
/* Get pointer to host config structure */
adapter = (adapter_t *)sdev->host->hostdata;
if (IS_RAID_CH(adapter, sdev->channel)) {
/* Default heads (64) & sectors (32) */
heads = 64;
sectors = 32;
cylinders = (ulong)capacity / (heads * sectors);
/*
* Handle extended translation size for logical drives
* > 1Gb
*/
if ((ulong)capacity >= 0x200000) {
heads = 255;
sectors = 63;
cylinders = (ulong)capacity / (heads * sectors);
}
/* return result */
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
}
else {
if (scsi_partsize(bdev, capacity, geom))
return 0;
dev_info(&adapter->dev->dev,
"invalid partition on this disk on channel %d\n",
sdev->channel);
/* Default heads (64) & sectors (32) */
heads = 64;
sectors = 32;
cylinders = (ulong)capacity / (heads * sectors);
/* Handle extended translation size for logical drives > 1Gb */
if ((ulong)capacity >= 0x200000) {
heads = 255;
sectors = 63;
cylinders = (ulong)capacity / (heads * sectors);
}
/* return result */
geom[0] = heads;
geom[1] = sectors;
geom[2] = cylinders;
}
return 0;
}
/**
* mega_init_scb()
* @adapter: pointer to our soft state
*
* Allocate memory for the various pointers in the scb structures:
* scatter-gather list pointer, passthru and extended passthru structure
* pointers.
*/
static int
mega_init_scb(adapter_t *adapter)
{
scb_t *scb;
int i;
for( i = 0; i < adapter->max_cmds; i++ ) {
scb = &adapter->scb_list[i];
scb->sgl64 = NULL;
scb->sgl = NULL;
scb->pthru = NULL;
scb->epthru = NULL;
}
for( i = 0; i < adapter->max_cmds; i++ ) {
scb = &adapter->scb_list[i];
scb->idx = i;
scb->sgl64 = dma_alloc_coherent(&adapter->dev->dev,
sizeof(mega_sgl64) * adapter->sglen,
&scb->sgl_dma_addr, GFP_KERNEL);
scb->sgl = (mega_sglist *)scb->sgl64;
if( !scb->sgl ) {
dev_warn(&adapter->dev->dev, "RAID: Can't allocate sglist\n");
mega_free_sgl(adapter);
return -1;
}
scb->pthru = dma_alloc_coherent(&adapter->dev->dev,
sizeof(mega_passthru),
&scb->pthru_dma_addr, GFP_KERNEL);
if( !scb->pthru ) {
dev_warn(&adapter->dev->dev, "RAID: Can't allocate passthru\n");
mega_free_sgl(adapter);
return -1;
}
scb->epthru = dma_alloc_coherent(&adapter->dev->dev,
sizeof(mega_ext_passthru),
&scb->epthru_dma_addr, GFP_KERNEL);
if( !scb->epthru ) {
dev_warn(&adapter->dev->dev,
"Can't allocate extended passthru\n");
mega_free_sgl(adapter);
return -1;
}
scb->dma_type = MEGA_DMA_TYPE_NONE;
/*
* Link to free list
* lock not required since we are loading the driver, so no
* commands possible right now.
*/
scb->state = SCB_FREE;
scb->cmd = NULL;
list_add(&scb->list, &adapter->free_list);
}
return 0;
}
/**
* megadev_open()
* @inode: unused
* @filep: unused
*
* Routines for the character/ioctl interface to the driver. Find out if this
* is a valid open.
*/
static int
megadev_open (struct inode *inode, struct file *filep)
{
/*
* Only allow superuser to access private ioctl interface
*/
if( !capable(CAP_SYS_ADMIN) ) return -EACCES;
return 0;
}
/**
* megadev_ioctl()
* @filep: Our device file
* @cmd: ioctl command
* @arg: user buffer
*
* ioctl entry point for our private ioctl interface. We move the data in from
* the user space, prepare the command (if necessary, convert the old MIMD
* ioctl to new ioctl command), and issue a synchronous command to the
* controller.
*/
static int
megadev_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
{
adapter_t *adapter;
nitioctl_t uioc;
int adapno;
int rval;
mega_passthru __user *upthru; /* user address for passthru */
mega_passthru *pthru; /* copy user passthru here */
dma_addr_t pthru_dma_hndl;
void *data = NULL; /* data to be transferred */
dma_addr_t data_dma_hndl; /* dma handle for data xfer area */
megacmd_t mc;
#if MEGA_HAVE_STATS
megastat_t __user *ustats = NULL;
int num_ldrv = 0;
#endif
u32 uxferaddr = 0;
struct pci_dev *pdev;
/*
* Make sure only USCSICMD are issued through this interface.
* MIMD application would still fire different command.
*/
if( (_IOC_TYPE(cmd) != MEGAIOC_MAGIC) && (cmd != USCSICMD) ) {
return -EINVAL;
}
/*
* Check and convert a possible MIMD command to NIT command.
* mega_m_to_n() copies the data from the user space, so we do not
* have to do it here.
* NOTE: We will need some user address to copyout the data, therefore
* the inteface layer will also provide us with the required user
* addresses.
*/
memset(&uioc, 0, sizeof(nitioctl_t));
if( (rval = mega_m_to_n( (void __user *)arg, &uioc)) != 0 )
return rval;
switch( uioc.opcode ) {
case GET_DRIVER_VER:
if( put_user(driver_ver, (u32 __user *)uioc.uioc_uaddr) )
return (-EFAULT);
break;
case GET_N_ADAP:
if( put_user(hba_count, (u32 __user *)uioc.uioc_uaddr) )
return (-EFAULT);
/*
* Shucks. MIMD interface returns a positive value for number
* of adapters. TODO: Change it to return 0 when there is no
* applicatio using mimd interface.
*/
return hba_count;
case GET_ADAP_INFO:
/*
* Which adapter
*/
if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
return (-ENODEV);
if( copy_to_user(uioc.uioc_uaddr, mcontroller+adapno,
sizeof(struct mcontroller)) )
return (-EFAULT);
break;
#if MEGA_HAVE_STATS
case GET_STATS:
/*
* Which adapter
*/
if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
return (-ENODEV);
adapter = hba_soft_state[adapno];
ustats = uioc.uioc_uaddr;
if( copy_from_user(&num_ldrv, &ustats->num_ldrv, sizeof(int)) )
return (-EFAULT);
/*
* Check for the validity of the logical drive number
*/
if( num_ldrv >= MAX_LOGICAL_DRIVES_40LD ) return -EINVAL;
if( copy_to_user(ustats->nreads, adapter->nreads,
num_ldrv*sizeof(u32)) )
return -EFAULT;
if( copy_to_user(ustats->nreadblocks, adapter->nreadblocks,
num_ldrv*sizeof(u32)) )
return -EFAULT;
if( copy_to_user(ustats->nwrites, adapter->nwrites,
num_ldrv*sizeof(u32)) )
return -EFAULT;
if( copy_to_user(ustats->nwriteblocks, adapter->nwriteblocks,
num_ldrv*sizeof(u32)) )
return -EFAULT;
if( copy_to_user(ustats->rd_errors, adapter->rd_errors,
num_ldrv*sizeof(u32)) )
return -EFAULT;
if( copy_to_user(ustats->wr_errors, adapter->wr_errors,
num_ldrv*sizeof(u32)) )
return -EFAULT;
return 0;
#endif
case MBOX_CMD:
/*
* Which adapter
*/
if( (adapno = GETADAP(uioc.adapno)) >= hba_count )
return (-ENODEV);
adapter = hba_soft_state[adapno];
/*
* Deletion of logical drive is a special case. The adapter
* should be quiescent before this command is issued.
*/
if( uioc.uioc_rmbox[0] == FC_DEL_LOGDRV &&
uioc.uioc_rmbox[2] == OP_DEL_LOGDRV ) {
/*
* Do we support this feature
*/
if( !adapter->support_random_del ) {
dev_warn(&adapter->dev->dev, "logdrv "
"delete on non-supporting F/W\n");
return (-EINVAL);
}
rval = mega_del_logdrv( adapter, uioc.uioc_rmbox[3] );
if( rval == 0 ) {
memset(&mc, 0, sizeof(megacmd_t));
mc.status = rval;
rval = mega_n_to_m((void __user *)arg, &mc);
}
return rval;
}
/*
* This interface only support the regular passthru commands.
* Reject extended passthru and 64-bit passthru
*/
if( uioc.uioc_rmbox[0] == MEGA_MBOXCMD_PASSTHRU64 ||
uioc.uioc_rmbox[0] == MEGA_MBOXCMD_EXTPTHRU ) {
dev_warn(&adapter->dev->dev, "rejected passthru\n");
return (-EINVAL);
}
/*
* For all internal commands, the buffer must be allocated in
* <4GB address range
*/
if( make_local_pdev(adapter, &pdev) != 0 )
return -EIO;