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kernel/drivers/scsi/gdth_proc.c
Christoph Hellwig bb327df832 scsi: gdth: use generic DMA API 
Switch from the legacy PCI DMA API to the generic DMA API.  Also switch
to dma_map_single from pci_map_page in one case where this makes the code
simpler.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2019-01-08 21:58:35 -05:00

586 lines
21 KiB
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// SPDX-License-Identifier: GPL-2.0
/* gdth_proc.c
* $Id: gdth_proc.c,v 1.43 2006/01/11 16:15:00 achim Exp $
*/
#include <linux/completion.h>
#include <linux/slab.h>
int gdth_set_info(struct Scsi_Host *host, char *buffer, int length)
{
gdth_ha_str *ha = shost_priv(host);
int ret_val = -EINVAL;
TRACE2(("gdth_set_info() ha %d\n",ha->hanum,));
if (length >= 4) {
if (strncmp(buffer,"gdth",4) == 0) {
buffer += 5;
length -= 5;
ret_val = gdth_set_asc_info(host, buffer, length, ha);
}
}
return ret_val;
}
static int gdth_set_asc_info(struct Scsi_Host *host, char *buffer,
int length, gdth_ha_str *ha)
{
int orig_length, drive, wb_mode;
int i, found;
gdth_cmd_str gdtcmd;
gdth_cpar_str *pcpar;
char cmnd[MAX_COMMAND_SIZE];
memset(cmnd, 0xff, 12);
memset(&gdtcmd, 0, sizeof(gdth_cmd_str));
TRACE2(("gdth_set_asc_info() ha %d\n",ha->hanum));
orig_length = length + 5;
drive = -1;
wb_mode = 0;
found = FALSE;
if (length >= 5 && strncmp(buffer,"flush",5)==0) {
buffer += 6;
length -= 6;
if (length && *buffer>='0' && *buffer<='9') {
drive = (int)(*buffer-'0');
++buffer; --length;
if (length && *buffer>='0' && *buffer<='9') {
drive = drive*10 + (int)(*buffer-'0');
++buffer; --length;
}
printk("GDT: Flushing host drive %d .. ",drive);
} else {
printk("GDT: Flushing all host drives .. ");
}
for (i = 0; i < MAX_HDRIVES; ++i) {
if (ha->hdr[i].present) {
if (drive != -1 && i != drive)
continue;
found = TRUE;
gdtcmd.Service = CACHESERVICE;
gdtcmd.OpCode = GDT_FLUSH;
if (ha->cache_feat & GDT_64BIT) {
gdtcmd.u.cache64.DeviceNo = i;
gdtcmd.u.cache64.BlockNo = 1;
} else {
gdtcmd.u.cache.DeviceNo = i;
gdtcmd.u.cache.BlockNo = 1;
}
gdth_execute(host, &gdtcmd, cmnd, 30, NULL);
}
}
if (!found)
printk("\nNo host drive found !\n");
else
printk("Done.\n");
return(orig_length);
}
if (length >= 7 && strncmp(buffer,"wbp_off",7)==0) {
buffer += 8;
length -= 8;
printk("GDT: Disabling write back permanently .. ");
wb_mode = 1;
} else if (length >= 6 && strncmp(buffer,"wbp_on",6)==0) {
buffer += 7;
length -= 7;
printk("GDT: Enabling write back permanently .. ");
wb_mode = 2;
} else if (length >= 6 && strncmp(buffer,"wb_off",6)==0) {
buffer += 7;
length -= 7;
printk("GDT: Disabling write back commands .. ");
if (ha->cache_feat & GDT_WR_THROUGH) {
gdth_write_through = TRUE;
printk("Done.\n");
} else {
printk("Not supported !\n");
}
return(orig_length);
} else if (length >= 5 && strncmp(buffer,"wb_on",5)==0) {
buffer += 6;
length -= 6;
printk("GDT: Enabling write back commands .. ");
gdth_write_through = FALSE;
printk("Done.\n");
return(orig_length);
}
if (wb_mode) {
unsigned long flags;
BUILD_BUG_ON(sizeof(gdth_cpar_str) > GDTH_SCRATCH);
spin_lock_irqsave(&ha->smp_lock, flags);
if (ha->scratch_busy) {
spin_unlock_irqrestore(&ha->smp_lock, flags);
return -EBUSY;
}
ha->scratch_busy = TRUE;
spin_unlock_irqrestore(&ha->smp_lock, flags);
pcpar = (gdth_cpar_str *)ha->pscratch;
memcpy( pcpar, &ha->cpar, sizeof(gdth_cpar_str) );
gdtcmd.Service = CACHESERVICE;
gdtcmd.OpCode = GDT_IOCTL;
gdtcmd.u.ioctl.p_param = ha->scratch_phys;
gdtcmd.u.ioctl.param_size = sizeof(gdth_cpar_str);
gdtcmd.u.ioctl.subfunc = CACHE_CONFIG;
gdtcmd.u.ioctl.channel = INVALID_CHANNEL;
pcpar->write_back = wb_mode==1 ? 0:1;
gdth_execute(host, &gdtcmd, cmnd, 30, NULL);
spin_lock_irqsave(&ha->smp_lock, flags);
ha->scratch_busy = FALSE;
spin_unlock_irqrestore(&ha->smp_lock, flags);
printk("Done.\n");
return(orig_length);
}
printk("GDT: Unknown command: %s Length: %d\n",buffer,length);
return(-EINVAL);
}
int gdth_show_info(struct seq_file *m, struct Scsi_Host *host)
{
gdth_ha_str *ha = shost_priv(host);
int hlen;
int id, i, j, k, sec, flag;
int no_mdrv = 0, drv_no, is_mirr;
u32 cnt;
dma_addr_t paddr;
int rc = -ENOMEM;
gdth_cmd_str *gdtcmd;
gdth_evt_str *estr;
char hrec[277];
char *buf;
gdth_dskstat_str *pds;
gdth_diskinfo_str *pdi;
gdth_arrayinf_str *pai;
gdth_defcnt_str *pdef;
gdth_cdrinfo_str *pcdi;
gdth_hget_str *phg;
char cmnd[MAX_COMMAND_SIZE];
gdtcmd = kmalloc(sizeof(*gdtcmd), GFP_KERNEL);
estr = kmalloc(sizeof(*estr), GFP_KERNEL);
if (!gdtcmd || !estr)
goto free_fail;
memset(cmnd, 0xff, 12);
memset(gdtcmd, 0, sizeof(gdth_cmd_str));
TRACE2(("gdth_get_info() ha %d\n",ha->hanum));
/* request is i.e. "cat /proc/scsi/gdth/0" */
/* format: %-15s\t%-10s\t%-15s\t%s */
/* driver parameters */
seq_puts(m, "Driver Parameters:\n");
if (reserve_list[0] == 0xff)
strcpy(hrec, "--");
else {
hlen = sprintf(hrec, "%d", reserve_list[0]);
for (i = 1; i < MAX_RES_ARGS; i++) {
if (reserve_list[i] == 0xff)
break;
hlen += snprintf(hrec + hlen , 161 - hlen, ",%d", reserve_list[i]);
}
}
seq_printf(m,
" reserve_mode: \t%d \treserve_list: \t%s\n",
reserve_mode, hrec);
seq_printf(m,
" max_ids: \t%-3d \thdr_channel: \t%d\n",
max_ids, hdr_channel);
/* controller information */
seq_puts(m, "\nDisk Array Controller Information:\n");
seq_printf(m,
" Number: \t%d \tName: \t%s\n",
ha->hanum, ha->binfo.type_string);
seq_printf(m,
" Driver Ver.: \t%-10s\tFirmware Ver.: \t",
GDTH_VERSION_STR);
if (ha->more_proc)
seq_printf(m, "%d.%02d.%02d-%c%03X\n",
(u8)(ha->binfo.upd_fw_ver>>24),
(u8)(ha->binfo.upd_fw_ver>>16),
(u8)(ha->binfo.upd_fw_ver),
ha->bfeat.raid ? 'R':'N',
ha->binfo.upd_revision);
else
seq_printf(m, "%d.%02d\n", (u8)(ha->cpar.version>>8),
(u8)(ha->cpar.version));
if (ha->more_proc)
/* more information: 1. about controller */
seq_printf(m,
" Serial No.: \t0x%8X\tCache RAM size:\t%d KB\n",
ha->binfo.ser_no, ha->binfo.memsize / 1024);
if (ha->more_proc) {
size_t size = max_t(size_t, GDTH_SCRATCH, sizeof(gdth_hget_str));
/* more information: 2. about physical devices */
seq_puts(m, "\nPhysical Devices:");
flag = FALSE;
buf = dma_alloc_coherent(&ha->pdev->dev, size, &paddr, GFP_KERNEL);
if (!buf)
goto stop_output;
for (i = 0; i < ha->bus_cnt; ++i) {
/* 2.a statistics (and retries/reassigns) */
TRACE2(("pdr_statistics() chn %d\n",i));
pds = (gdth_dskstat_str *)(buf + GDTH_SCRATCH/4);
gdtcmd->Service = CACHESERVICE;
gdtcmd->OpCode = GDT_IOCTL;
gdtcmd->u.ioctl.p_param = paddr + GDTH_SCRATCH/4;
gdtcmd->u.ioctl.param_size = 3*GDTH_SCRATCH/4;
gdtcmd->u.ioctl.subfunc = DSK_STATISTICS | L_CTRL_PATTERN;
gdtcmd->u.ioctl.channel = ha->raw[i].address | INVALID_CHANNEL;
pds->bid = ha->raw[i].local_no;
pds->first = 0;
pds->entries = ha->raw[i].pdev_cnt;
cnt = (3*GDTH_SCRATCH/4 - 5 * sizeof(u32)) /
sizeof(pds->list[0]);
if (pds->entries > cnt)
pds->entries = cnt;
if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) != S_OK)
pds->count = 0;
/* other IOCTLs must fit into area GDTH_SCRATCH/4 */
for (j = 0; j < ha->raw[i].pdev_cnt; ++j) {
/* 2.b drive info */
TRACE2(("scsi_drv_info() chn %d dev %d\n",
i, ha->raw[i].id_list[j]));
pdi = (gdth_diskinfo_str *)buf;
gdtcmd->Service = CACHESERVICE;
gdtcmd->OpCode = GDT_IOCTL;
gdtcmd->u.ioctl.p_param = paddr;
gdtcmd->u.ioctl.param_size = sizeof(gdth_diskinfo_str);
gdtcmd->u.ioctl.subfunc = SCSI_DR_INFO | L_CTRL_PATTERN;
gdtcmd->u.ioctl.channel =
ha->raw[i].address | ha->raw[i].id_list[j];
if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
strncpy(hrec,pdi->vendor,8);
strncpy(hrec+8,pdi->product,16);
strncpy(hrec+24,pdi->revision,4);
hrec[28] = 0;
seq_printf(m,
"\n Chn/ID/LUN: \t%c/%02d/%d \tName: \t%s\n",
'A'+i,pdi->target_id,pdi->lun,hrec);
flag = TRUE;
pdi->no_ldrive &= 0xffff;
if (pdi->no_ldrive == 0xffff)
strcpy(hrec,"--");
else
sprintf(hrec,"%d",pdi->no_ldrive);
seq_printf(m,
" Capacity [MB]:\t%-6d \tTo Log. Drive: \t%s\n",
pdi->blkcnt/(1024*1024/pdi->blksize),
hrec);
} else {
pdi->devtype = 0xff;
}
if (pdi->devtype == 0) {
/* search retries/reassigns */
for (k = 0; k < pds->count; ++k) {
if (pds->list[k].tid == pdi->target_id &&
pds->list[k].lun == pdi->lun) {
seq_printf(m,
" Retries: \t%-6d \tReassigns: \t%d\n",
pds->list[k].retries,
pds->list[k].reassigns);
break;
}
}
/* 2.c grown defects */
TRACE2(("scsi_drv_defcnt() chn %d dev %d\n",
i, ha->raw[i].id_list[j]));
pdef = (gdth_defcnt_str *)buf;
gdtcmd->Service = CACHESERVICE;
gdtcmd->OpCode = GDT_IOCTL;
gdtcmd->u.ioctl.p_param = paddr;
gdtcmd->u.ioctl.param_size = sizeof(gdth_defcnt_str);
gdtcmd->u.ioctl.subfunc = SCSI_DEF_CNT | L_CTRL_PATTERN;
gdtcmd->u.ioctl.channel =
ha->raw[i].address | ha->raw[i].id_list[j];
pdef->sddc_type = 0x08;
if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
seq_printf(m,
" Grown Defects:\t%d\n",
pdef->sddc_cnt);
}
}
}
}
if (!flag)
seq_puts(m, "\n --\n");
/* 3. about logical drives */
seq_puts(m, "\nLogical Drives:");
flag = FALSE;
for (i = 0; i < MAX_LDRIVES; ++i) {
if (!ha->hdr[i].is_logdrv)
continue;
drv_no = i;
j = k = 0;
is_mirr = FALSE;
do {
/* 3.a log. drive info */
TRACE2(("cache_drv_info() drive no %d\n",drv_no));
pcdi = (gdth_cdrinfo_str *)buf;
gdtcmd->Service = CACHESERVICE;
gdtcmd->OpCode = GDT_IOCTL;
gdtcmd->u.ioctl.p_param = paddr;
gdtcmd->u.ioctl.param_size = sizeof(gdth_cdrinfo_str);
gdtcmd->u.ioctl.subfunc = CACHE_DRV_INFO;
gdtcmd->u.ioctl.channel = drv_no;
if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) != S_OK)
break;
pcdi->ld_dtype >>= 16;
j++;
if (pcdi->ld_dtype > 2) {
strcpy(hrec, "missing");
} else if (pcdi->ld_error & 1) {
strcpy(hrec, "fault");
} else if (pcdi->ld_error & 2) {
strcpy(hrec, "invalid");
k++; j--;
} else {
strcpy(hrec, "ok");
}
if (drv_no == i) {
seq_printf(m,
"\n Number: \t%-2d \tStatus: \t%s\n",
drv_no, hrec);
flag = TRUE;
no_mdrv = pcdi->cd_ldcnt;
if (no_mdrv > 1 || pcdi->ld_slave != -1) {
is_mirr = TRUE;
strcpy(hrec, "RAID-1");
} else if (pcdi->ld_dtype == 0) {
strcpy(hrec, "Disk");
} else if (pcdi->ld_dtype == 1) {
strcpy(hrec, "RAID-0");
} else if (pcdi->ld_dtype == 2) {
strcpy(hrec, "Chain");
} else {
strcpy(hrec, "???");
}
seq_printf(m,
" Capacity [MB]:\t%-6d \tType: \t%s\n",
pcdi->ld_blkcnt/(1024*1024/pcdi->ld_blksize),
hrec);
} else {
seq_printf(m,
" Slave Number: \t%-2d \tStatus: \t%s\n",
drv_no & 0x7fff, hrec);
}
drv_no = pcdi->ld_slave;
} while (drv_no != -1);
if (is_mirr)
seq_printf(m,
" Missing Drv.: \t%-2d \tInvalid Drv.: \t%d\n",
no_mdrv - j - k, k);
if (!ha->hdr[i].is_arraydrv)
strcpy(hrec, "--");
else
sprintf(hrec, "%d", ha->hdr[i].master_no);
seq_printf(m,
" To Array Drv.:\t%s\n", hrec);
}
if (!flag)
seq_puts(m, "\n --\n");
/* 4. about array drives */
seq_puts(m, "\nArray Drives:");
flag = FALSE;
for (i = 0; i < MAX_LDRIVES; ++i) {
if (!(ha->hdr[i].is_arraydrv && ha->hdr[i].is_master))
continue;
/* 4.a array drive info */
TRACE2(("array_info() drive no %d\n",i));
pai = (gdth_arrayinf_str *)buf;
gdtcmd->Service = CACHESERVICE;
gdtcmd->OpCode = GDT_IOCTL;
gdtcmd->u.ioctl.p_param = paddr;
gdtcmd->u.ioctl.param_size = sizeof(gdth_arrayinf_str);
gdtcmd->u.ioctl.subfunc = ARRAY_INFO | LA_CTRL_PATTERN;
gdtcmd->u.ioctl.channel = i;
if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
if (pai->ai_state == 0)
strcpy(hrec, "idle");
else if (pai->ai_state == 2)
strcpy(hrec, "build");
else if (pai->ai_state == 4)
strcpy(hrec, "ready");
else if (pai->ai_state == 6)
strcpy(hrec, "fail");
else if (pai->ai_state == 8 || pai->ai_state == 10)
strcpy(hrec, "rebuild");
else
strcpy(hrec, "error");
if (pai->ai_ext_state & 0x10)
strcat(hrec, "/expand");
else if (pai->ai_ext_state & 0x1)
strcat(hrec, "/patch");
seq_printf(m,
"\n Number: \t%-2d \tStatus: \t%s\n",
i,hrec);
flag = TRUE;
if (pai->ai_type == 0)
strcpy(hrec, "RAID-0");
else if (pai->ai_type == 4)
strcpy(hrec, "RAID-4");
else if (pai->ai_type == 5)
strcpy(hrec, "RAID-5");
else
strcpy(hrec, "RAID-10");
seq_printf(m,
" Capacity [MB]:\t%-6d \tType: \t%s\n",
pai->ai_size/(1024*1024/pai->ai_secsize),
hrec);
}
}
if (!flag)
seq_puts(m, "\n --\n");
/* 5. about host drives */
seq_puts(m, "\nHost Drives:");
flag = FALSE;
for (i = 0; i < MAX_LDRIVES; ++i) {
if (!ha->hdr[i].is_logdrv ||
(ha->hdr[i].is_arraydrv && !ha->hdr[i].is_master))
continue;
/* 5.a get host drive list */
TRACE2(("host_get() drv_no %d\n",i));
phg = (gdth_hget_str *)buf;
gdtcmd->Service = CACHESERVICE;
gdtcmd->OpCode = GDT_IOCTL;
gdtcmd->u.ioctl.p_param = paddr;
gdtcmd->u.ioctl.param_size = sizeof(gdth_hget_str);
gdtcmd->u.ioctl.subfunc = HOST_GET | LA_CTRL_PATTERN;
gdtcmd->u.ioctl.channel = i;
phg->entries = MAX_HDRIVES;
phg->offset = GDTOFFSOF(gdth_hget_str, entry[0]);
if (gdth_execute(host, gdtcmd, cmnd, 30, NULL) == S_OK) {
ha->hdr[i].ldr_no = i;
ha->hdr[i].rw_attribs = 0;
ha->hdr[i].start_sec = 0;
} else {
for (j = 0; j < phg->entries; ++j) {
k = phg->entry[j].host_drive;
if (k >= MAX_LDRIVES)
continue;
ha->hdr[k].ldr_no = phg->entry[j].log_drive;
ha->hdr[k].rw_attribs = phg->entry[j].rw_attribs;
ha->hdr[k].start_sec = phg->entry[j].start_sec;
}
}
}
dma_free_coherent(&ha->pdev->dev, size, buf, paddr);
for (i = 0; i < MAX_HDRIVES; ++i) {
if (!(ha->hdr[i].present))
continue;
seq_printf(m,
"\n Number: \t%-2d \tArr/Log. Drive:\t%d\n",
i, ha->hdr[i].ldr_no);
flag = TRUE;
seq_printf(m,
" Capacity [MB]:\t%-6d \tStart Sector: \t%d\n",
(u32)(ha->hdr[i].size/2048), ha->hdr[i].start_sec);
}
if (!flag)
seq_puts(m, "\n --\n");
}
/* controller events */
seq_puts(m, "\nController Events:\n");
for (id = -1;;) {
id = gdth_read_event(ha, id, estr);
if (estr->event_source == 0)
break;
if (estr->event_data.eu.driver.ionode == ha->hanum &&
estr->event_source == ES_ASYNC) {
gdth_log_event(&estr->event_data, hrec);
/*
* Elapsed seconds subtraction with unsigned operands is
* safe from wrap around in year 2106. Executes as:
* operand a + (2's complement operand b) + 1
*/
sec = (int)((u32)ktime_get_real_seconds() - estr->first_stamp);
if (sec < 0) sec = 0;
seq_printf(m," date- %02d:%02d:%02d\t%s\n",
sec/3600, sec%3600/60, sec%60, hrec);
}
if (id == -1)
break;
}
stop_output:
rc = 0;
free_fail:
kfree(gdtcmd);
kfree(estr);
return rc;
}
static void gdth_wait_completion(gdth_ha_str *ha, int busnum, int id)
{
unsigned long flags;
int i;
struct scsi_cmnd *scp;
struct gdth_cmndinfo *cmndinfo;
u8 b, t;
spin_lock_irqsave(&ha->smp_lock, flags);
for (i = 0; i < GDTH_MAXCMDS; ++i) {
scp = ha->cmd_tab[i].cmnd;
cmndinfo = gdth_cmnd_priv(scp);
b = scp->device->channel;
t = scp->device->id;
if (!SPECIAL_SCP(scp) && t == (u8)id &&
b == (u8)busnum) {
cmndinfo->wait_for_completion = 0;
spin_unlock_irqrestore(&ha->smp_lock, flags);
while (!cmndinfo->wait_for_completion)
barrier();
spin_lock_irqsave(&ha->smp_lock, flags);
}
}
spin_unlock_irqrestore(&ha->smp_lock, flags);
}
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