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libata: implement ZBC IN translation 

ZAC drives implement a 'ZAC Management In' command template,
which maps onto the ZBC IN command.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Hannes Reinecke 2016-04-25 12:45:52 +02:00 committed by Tejun Heo
parent 3a92945b24
commit 28a3fc2295
6 changed files with 185 additions and 1 deletions
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1
drivers/ata/libata-eh.c
View File

@ -2482,6 +2482,7 @@ const char *ata_get_cmd_descript(u8 command)
{ ATA_CMD_CFA_WRITE_MULT_NE, "CFA WRITE MULTIPLE WITHOUT ERASE" },
{ ATA_CMD_REQ_SENSE_DATA, "REQUEST SENSE DATA EXT" },
{ ATA_CMD_SANITIZE_DEVICE, "SANITIZE DEVICE" },
{ ATA_CMD_ZAC_MGMT_IN, "ZAC MANAGEMENT IN" },
{ ATA_CMD_READ_LONG, "READ LONG (with retries)" },
{ ATA_CMD_READ_LONG_ONCE, "READ LONG (without retries)" },
{ ATA_CMD_WRITE_LONG, "WRITE LONG (with retries)" },

157
drivers/ata/libata-scsi.c
View File

@ -3317,6 +3317,160 @@ static unsigned int ata_scsi_write_same_xlat(struct ata_queued_cmd *qc)
return 1;
}
/**
* ata_scsi_report_zones_complete - convert ATA output
* @qc: command structure returning the data
*
* Convert T-13 little-endian field representation into
* T-10 big-endian field representation.
* What a mess.
*/
static void ata_scsi_report_zones_complete(struct ata_queued_cmd *qc)
{
struct scsi_cmnd *scmd = qc->scsicmd;
struct sg_mapping_iter miter;
unsigned long flags;
unsigned int bytes = 0;
sg_miter_start(&miter, scsi_sglist(scmd), scsi_sg_count(scmd),
SG_MITER_TO_SG | SG_MITER_ATOMIC);
local_irq_save(flags);
while (sg_miter_next(&miter)) {
unsigned int offset = 0;
if (bytes == 0) {
char *hdr;
u32 list_length;
u64 max_lba, opt_lba;
u16 same;
/* Swizzle header */
hdr = miter.addr;
list_length = get_unaligned_le32(&hdr[0]);
same = get_unaligned_le16(&hdr[4]);
max_lba = get_unaligned_le64(&hdr[8]);
opt_lba = get_unaligned_le64(&hdr[16]);
put_unaligned_be32(list_length, &hdr[0]);
hdr[4] = same & 0xf;
put_unaligned_be64(max_lba, &hdr[8]);
put_unaligned_be64(opt_lba, &hdr[16]);
offset += 64;
bytes += 64;
}
while (offset < miter.length) {
char *rec;
u8 cond, type, non_seq, reset;
u64 size, start, wp;
/* Swizzle zone descriptor */
rec = miter.addr + offset;
type = rec[0] & 0xf;
cond = (rec[1] >> 4) & 0xf;
non_seq = (rec[1] & 2);
reset = (rec[1] & 1);
size = get_unaligned_le64(&rec[8]);
start = get_unaligned_le64(&rec[16]);
wp = get_unaligned_le64(&rec[24]);
rec[0] = type;
rec[1] = (cond << 4) | non_seq | reset;
put_unaligned_be64(size, &rec[8]);
put_unaligned_be64(start, &rec[16]);
put_unaligned_be64(wp, &rec[24]);
WARN_ON(offset + 64 > miter.length);
offset += 64;
bytes += 64;
}
}
sg_miter_stop(&miter);
local_irq_restore(flags);
ata_scsi_qc_complete(qc);
}
static unsigned int ata_scsi_zbc_in_xlat(struct ata_queued_cmd *qc)
{
struct ata_taskfile *tf = &qc->tf;
struct scsi_cmnd *scmd = qc->scsicmd;
const u8 *cdb = scmd->cmnd;
u16 sect, fp = (u16)-1;
u8 sa, options, bp = 0xff;
u64 block;
u32 n_block;
if (unlikely(scmd->cmd_len < 16)) {
ata_dev_warn(qc->dev, "invalid cdb length %d\n",
scmd->cmd_len);
fp = 15;
goto invalid_fld;
}
scsi_16_lba_len(cdb, &block, &n_block);
if (n_block != scsi_bufflen(scmd)) {
ata_dev_warn(qc->dev, "non-matching transfer count (%d/%d)\n",
n_block, scsi_bufflen(scmd));
goto invalid_param_len;
}
sa = cdb[1] & 0x1f;
if (sa != ZI_REPORT_ZONES) {
ata_dev_warn(qc->dev, "invalid service action %d\n", sa);
fp = 1;
goto invalid_fld;
}
/*
* ZAC allows only for transfers in 512 byte blocks,
* and uses a 16 bit value for the transfer count.
*/
if ((n_block / 512) > 0xffff || n_block < 512 || (n_block % 512)) {
ata_dev_warn(qc->dev, "invalid transfer count %d\n", n_block);
goto invalid_param_len;
}
sect = n_block / 512;
options = cdb[14];
if (ata_ncq_enabled(qc->dev) &&
ata_fpdma_zac_mgmt_in_supported(qc->dev)) {
tf->protocol = ATA_PROT_NCQ;
tf->command = ATA_CMD_FPDMA_RECV;
tf->hob_nsect = ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN & 0x1f;
tf->nsect = qc->tag << 3;
tf->feature = sect & 0xff;
tf->hob_feature = (sect >> 8) & 0xff;
tf->auxiliary = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
} else {
tf->command = ATA_CMD_ZAC_MGMT_IN;
tf->feature = ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES;
tf->protocol = ATA_PROT_DMA;
tf->hob_feature = options;
tf->hob_nsect = (sect >> 8) & 0xff;
tf->nsect = sect & 0xff;
}
tf->device = ATA_LBA;
tf->lbah = (block >> 16) & 0xff;
tf->lbam = (block >> 8) & 0xff;
tf->lbal = block & 0xff;
tf->hob_lbah = (block >> 40) & 0xff;
tf->hob_lbam = (block >> 32) & 0xff;
tf->hob_lbal = (block >> 24) & 0xff;
tf->flags |= ATA_TFLAG_ISADDR | ATA_TFLAG_DEVICE | ATA_TFLAG_LBA48;
qc->flags |= ATA_QCFLAG_RESULT_TF;
ata_qc_set_pc_nbytes(qc);
qc->complete_fn = ata_scsi_report_zones_complete;
return 0;
invalid_fld:
ata_scsi_set_invalid_field(qc->dev, scmd, fp, bp);
return 1;
invalid_param_len:
/* "Parameter list length error" */
ata_scsi_set_sense(qc->dev, scmd, ILLEGAL_REQUEST, 0x1a, 0x0);
return 1;
}
/**
* ata_mselect_caching - Simulate MODE SELECT for caching info page
* @qc: Storage for translated ATA taskfile
@ -3632,6 +3786,9 @@ static inline ata_xlat_func_t ata_get_xlat_func(struct ata_device *dev, u8 cmd)
return ata_scsi_mode_select_xlat;
break;
case ZBC_IN:
return ata_scsi_zbc_in_xlat;
case START_STOP:
return ata_scsi_start_stop_xlat;
}

10
drivers/ata/libata-trace.c
View File

@ -162,6 +162,9 @@ libata_trace_parse_subcmd(struct trace_seq *p, unsigned char cmd,
case ATA_SUBCMD_FPDMA_RECV_RD_LOG_DMA_EXT:
trace_seq_printf(p, " READ_LOG_DMA_EXT");
break;
case ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN:
trace_seq_printf(p, " ZAC_MGMT_IN");
break;
}
break;
case ATA_CMD_FPDMA_SEND:
@ -187,6 +190,13 @@ libata_trace_parse_subcmd(struct trace_seq *p, unsigned char cmd,
break;
}
break;
case ATA_CMD_ZAC_MGMT_IN:
switch (feature) {
case ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES:
trace_seq_printf(p, " REPORT_ZONES");
break;
}
break;
}
trace_seq_putc(p, 0);

10
include/linux/ata.h
View File

@ -302,12 +302,14 @@ enum {
ATA_CMD_CFA_WRITE_MULT_NE = 0xCD,
ATA_CMD_REQ_SENSE_DATA = 0x0B,
ATA_CMD_SANITIZE_DEVICE = 0xB4,
ATA_CMD_ZAC_MGMT_IN = 0x4A,
/* marked obsolete in the ATA/ATAPI-7 spec */
ATA_CMD_RESTORE = 0x10,
/* Subcmds for ATA_CMD_FPDMA_RECV */
ATA_SUBCMD_FPDMA_RECV_RD_LOG_DMA_EXT = 0x01,
ATA_SUBCMD_FPDMA_RECV_ZAC_MGMT_IN = 0x02,
/* Subcmds for ATA_CMD_FPDMA_SEND */
ATA_SUBCMD_FPDMA_SEND_DSM = 0x00,
@ -318,6 +320,9 @@ enum {
ATA_SUBCMD_NCQ_NON_DATA_SET_FEATURES = 0x05,
ATA_SUBCMD_NCQ_NON_DATA_ZERO_EXT = 0x06,
/* Subcmds for ATA_CMD_ZAC_MGMT_IN */
ATA_SUBCMD_ZAC_MGMT_IN_REPORT_ZONES = 0x00,
/* READ_LOG_EXT pages */
ATA_LOG_DIRECTORY = 0x0,
ATA_LOG_SATA_NCQ = 0x10,
@ -341,7 +346,10 @@ enum {
ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED = (1 << 0),
ATA_LOG_NCQ_SEND_RECV_WR_LOG_OFFSET = 0x0C,
ATA_LOG_NCQ_SEND_RECV_WR_LOG_SUPPORTED = (1 << 0),
ATA_LOG_NCQ_SEND_RECV_SIZE = 0x10,
ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET = 0x10,
ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OUT_SUPPORTED = (1 << 0),
ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED = (1 << 1),
ATA_LOG_NCQ_SEND_RECV_SIZE = 0x14,
/* NCQ Non-Data log */
ATA_LOG_NCQ_NON_DATA_SUBCMDS_OFFSET = 0x00,

7
include/linux/libata.h
View File

@ -1651,6 +1651,13 @@ static inline bool ata_fpdma_read_log_supported(struct ata_device *dev)
ATA_LOG_NCQ_SEND_RECV_RD_LOG_SUPPORTED);
}
static inline bool ata_fpdma_zac_mgmt_in_supported(struct ata_device *dev)
{
return (dev->flags & ATA_DFLAG_NCQ_SEND_RECV) &&
(dev->ncq_send_recv_cmds[ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_OFFSET] &
ATA_LOG_NCQ_SEND_RECV_ZAC_MGMT_IN_SUPPORTED);
}
static inline void ata_qc_set_polling(struct ata_queued_cmd *qc)
{
qc->tf.ctl |= ATA_NIEN;

1
include/trace/events/libata.h
View File

@ -98,6 +98,7 @@
ata_opcode_name(ATA_CMD_CFA_WRITE_MULT_NE), \
ata_opcode_name(ATA_CMD_REQ_SENSE_DATA), \
ata_opcode_name(ATA_CMD_SANITIZE_DEVICE), \
ata_opcode_name(ATA_CMD_ZAC_MGMT_IN), \
ata_opcode_name(ATA_CMD_RESTORE), \
ata_opcode_name(ATA_CMD_READ_LONG), \
ata_opcode_name(ATA_CMD_READ_LONG_ONCE), \