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scsi: 3w-9xxx: Fix endianness issues in command packets 

The controller expects all data it sends/receives to be little-endian.
Therefore, the packet struct definitions should use the __le16/32/64
types. Once those are correct, sparse reports several issues with the
driver code, which are fixed here as well.

The main issue observed was at the call to scsi_set_resid(), where the
byteswapped parameter would eventually trigger the alignment check at
drivers/scsi/sd.c:2009. At that point, the kernel would continuously
complain about an "Unaligned partial completion", and no further I/O could
occur.

This gets the controller working on big endian powerpc64.

Link: https://lore.kernel.org/r/20210427235915.39211-4-samuel@sholland.org
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Samuel Holland 2021-04-27 18:59:15 -05:00 committed by Martin K. Petersen
parent d133b44148
commit 05f7f1b9ee
2 changed files with 81 additions and 86 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/scsi/3w-9xxx.c
View File

@ -303,10 +303,10 @@ static int twa_aen_drain_queue(TW_Device_Extension *tw_dev, int no_check_reset)
/* Initialize sglist */
memset(&sglist, 0, sizeof(TW_SG_Entry));
sglist[0].length = TW_SECTOR_SIZE;
sglist[0].address = tw_dev->generic_buffer_phys[request_id];
sglist[0].length = cpu_to_le32(TW_SECTOR_SIZE);
sglist[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
if (sglist[0].address & TW_ALIGNMENT_9000_SGL) {
if (tw_dev->generic_buffer_phys[request_id] & TW_ALIGNMENT_9000_SGL) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x1, "Found unaligned address during AEN drain");
goto out;
}
@ -440,8 +440,8 @@ static int twa_aen_read_queue(TW_Device_Extension *tw_dev, int request_id)
/* Initialize sglist */
memset(&sglist, 0, sizeof(TW_SG_Entry));
sglist[0].length = TW_SECTOR_SIZE;
sglist[0].address = tw_dev->generic_buffer_phys[request_id];
sglist[0].length = cpu_to_le32(TW_SECTOR_SIZE);
sglist[0].address = TW_CPU_TO_SGL(tw_dev->generic_buffer_phys[request_id]);
/* Mark internal command */
tw_dev->srb[request_id] = NULL;
@ -501,9 +501,8 @@ static void twa_aen_sync_time(TW_Device_Extension *tw_dev, int request_id)
Sunday 12:00AM */
local_time = (ktime_get_real_seconds() - (sys_tz.tz_minuteswest * 60));
div_u64_rem(local_time - (3 * 86400), 604800, &schedulertime);
schedulertime = cpu_to_le32(schedulertime % 604800);
memcpy(param->data, &schedulertime, sizeof(u32));
memcpy(param->data, &(__le32){cpu_to_le32(schedulertime)}, sizeof(__le32));
/* Mark internal command */
tw_dev->srb[request_id] = NULL;
@ -1004,19 +1003,13 @@ static int twa_fill_sense(TW_Device_Extension *tw_dev, int request_id, int copy_
if (print_host)
printk(KERN_WARNING "3w-9xxx: scsi%d: ERROR: (0x%02X:0x%04X): %s:%s.\n",
tw_dev->host->host_no,
TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
full_command_packet->header.status_block.error,
error_str[0] == '\0' ?
twa_string_lookup(twa_error_table,
full_command_packet->header.status_block.error) : error_str,
TW_MESSAGE_SOURCE_CONTROLLER_ERROR, error,
error_str[0] ? error_str : twa_string_lookup(twa_error_table, error),
full_command_packet->header.err_specific_desc);
else
printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s:%s.\n",
TW_MESSAGE_SOURCE_CONTROLLER_ERROR,
full_command_packet->header.status_block.error,
error_str[0] == '\0' ?
twa_string_lookup(twa_error_table,
full_command_packet->header.status_block.error) : error_str,
TW_MESSAGE_SOURCE_CONTROLLER_ERROR, error,
error_str[0] ? error_str : twa_string_lookup(twa_error_table, error),
full_command_packet->header.err_specific_desc);
}
@ -1133,12 +1126,11 @@ static int twa_initconnection(TW_Device_Extension *tw_dev, int message_credits,
tw_initconnect->opcode__reserved = TW_OPRES_IN(0, TW_OP_INIT_CONNECTION);
tw_initconnect->request_id = request_id;
tw_initconnect->message_credits = cpu_to_le16(message_credits);
tw_initconnect->features = set_features;
/* Turn on 64-bit sgl support if we need to */
tw_initconnect->features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
set_features |= sizeof(dma_addr_t) > 4 ? 1 : 0;
tw_initconnect->features = cpu_to_le32(tw_initconnect->features);
tw_initconnect->features = cpu_to_le32(set_features);
if (set_features & TW_EXTENDED_INIT_CONNECT) {
tw_initconnect->size = TW_INIT_COMMAND_PACKET_SIZE_EXTENDED;
@ -1351,8 +1343,10 @@ static irqreturn_t twa_interrupt(int irq, void *dev_instance)
/* Report residual bytes for single sgl */
if ((scsi_sg_count(cmd) <= 1) && (full_command_packet->command.newcommand.status == 0)) {
if (full_command_packet->command.newcommand.sg_list[0].length < scsi_bufflen(tw_dev->srb[request_id]))
scsi_set_resid(cmd, scsi_bufflen(cmd) - full_command_packet->command.newcommand.sg_list[0].length);
u32 length = le32_to_cpu(full_command_packet->command.newcommand.sg_list[0].length);
if (length < scsi_bufflen(cmd))
scsi_set_resid(cmd, scsi_bufflen(cmd) - length);
}
/* Now complete the io */
@ -1394,13 +1388,13 @@ static void twa_load_sgl(TW_Device_Extension *tw_dev, TW_Command_Full *full_comm
if (TW_OP_OUT(full_command_packet->command.newcommand.opcode__reserved) == TW_OP_EXECUTE_SCSI) {
newcommand = &full_command_packet->command.newcommand;
newcommand->request_id__lunl =
cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id));
TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->request_id__lunl), request_id);
if (length) {
newcommand->sg_list[0].address = TW_CPU_TO_SGL(dma_handle + sizeof(TW_Ioctl_Buf_Apache));
newcommand->sg_list[0].length = cpu_to_le32(length);
}
newcommand->sgl_entries__lunh =
cpu_to_le16(TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0));
TW_REQ_LUN_IN(TW_LUN_OUT(newcommand->sgl_entries__lunh), length ? 1 : 0);
} else {
oldcommand = &full_command_packet->command.oldcommand;
oldcommand->request_id = request_id;
@ -1835,10 +1829,10 @@ static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
if (srb) {
command_packet->unit = srb->device->id;
command_packet->request_id__lunl =
cpu_to_le16(TW_REQ_LUN_IN(srb->device->lun, request_id));
TW_REQ_LUN_IN(srb->device->lun, request_id);
} else {
command_packet->request_id__lunl =
cpu_to_le16(TW_REQ_LUN_IN(0, request_id));
TW_REQ_LUN_IN(0, request_id);
command_packet->unit = 0;
}
@ -1870,19 +1864,19 @@ static int twa_scsiop_execute_scsi(TW_Device_Extension *tw_dev, int request_id,
}
}
}
command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id])));
command_packet->sgl_entries__lunh = TW_REQ_LUN_IN((srb->device->lun >> 4), scsi_sg_count(tw_dev->srb[request_id]));
}
} else {
/* Internal cdb post */
for (i = 0; i < use_sg; i++) {
command_packet->sg_list[i].address = TW_CPU_TO_SGL(sglistarg[i].address);
command_packet->sg_list[i].length = cpu_to_le32(sglistarg[i].length);
command_packet->sg_list[i].address = sglistarg[i].address;
command_packet->sg_list[i].length = sglistarg[i].length;
if (command_packet->sg_list[i].address & TW_CPU_TO_SGL(TW_ALIGNMENT_9000_SGL)) {
TW_PRINTK(tw_dev->host, TW_DRIVER, 0x2f, "Found unaligned sgl address during internal post");
goto out;
}
}
command_packet->sgl_entries__lunh = cpu_to_le16(TW_REQ_LUN_IN(0, use_sg));
command_packet->sgl_entries__lunh = TW_REQ_LUN_IN(0, use_sg);
}
if (srb) {
@ -2107,7 +2101,7 @@ static int twa_probe(struct pci_dev *pdev, const struct pci_device_id *dev_id)
TW_PARAM_FWVER, TW_PARAM_FWVER_LENGTH),
(char *)twa_get_param(tw_dev, 1, TW_VERSION_TABLE,
TW_PARAM_BIOSVER, TW_PARAM_BIOSVER_LENGTH),
le32_to_cpu(*(int *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
le32_to_cpu(*(__le32 *)twa_get_param(tw_dev, 2, TW_INFORMATION_TABLE,
TW_PARAM_PORTCOUNT, TW_PARAM_PORTCOUNT_LENGTH)));
/* Try to enable MSI */

111
drivers/scsi/3w-9xxx.h
View File

@ -435,8 +435,8 @@ static twa_message_type twa_error_table[] = {
/* request_id: 12, lun: 4 */
#define TW_REQ_LUN_IN(lun, request_id) \
(((lun << 12) & 0xf000) | (request_id & 0xfff))
#define TW_LUN_OUT(lun) ((lun >> 12) & 0xf)
cpu_to_le16(((lun << 12) & 0xf000) | (request_id & 0xfff))
#define TW_LUN_OUT(lun) ((le16_to_cpu(lun) >> 12) & 0xf)
/* Macros */
#define TW_CONTROL_REG_ADDR(x) (x->base_addr)
@ -483,74 +483,75 @@ printk(KERN_WARNING "3w-9xxx: ERROR: (0x%02X:0x%04X): %s.\n",a,b,c); \
#define TW_APACHE_MAX_SGL_LENGTH (sizeof(dma_addr_t) > 4 ? 72 : 109)
#define TW_ESCALADE_MAX_SGL_LENGTH (sizeof(dma_addr_t) > 4 ? 41 : 62)
#define TW_PADDING_LENGTH (sizeof(dma_addr_t) > 4 ? 8 : 0)
#define TW_CPU_TO_SGL(x) (sizeof(dma_addr_t) > 4 ? cpu_to_le64(x) : cpu_to_le32(x))
#if IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT)
typedef u64 twa_addr_t;
typedef __le64 twa_addr_t;
#define TW_CPU_TO_SGL(x) cpu_to_le64(x)
#else
typedef u32 twa_addr_t;
typedef __le32 twa_addr_t;
#define TW_CPU_TO_SGL(x) cpu_to_le32(x)
#endif
/* Scatter Gather List Entry */
typedef struct TAG_TW_SG_Entry {
twa_addr_t address;
u32 length;
twa_addr_t address;
__le32 length;
} __packed TW_SG_Entry;
/* Command Packet */
typedef struct TW_Command {
unsigned char opcode__sgloffset;
unsigned char size;
unsigned char request_id;
unsigned char unit__hostid;
u8 opcode__sgloffset;
u8 size;
u8 request_id;
u8 unit__hostid;
/* Second DWORD */
unsigned char status;
unsigned char flags;
u8 status;
u8 flags;
union {
unsigned short block_count;
unsigned short parameter_count;
__le16 block_count;
__le16 parameter_count;
} byte6_offset;
union {
struct {
u32 lba;
TW_SG_Entry sgl[TW_ESCALADE_MAX_SGL_LENGTH];
twa_addr_t padding;
__le32 lba;
TW_SG_Entry sgl[TW_ESCALADE_MAX_SGL_LENGTH];
twa_addr_t padding;
} io;
struct {
TW_SG_Entry sgl[TW_ESCALADE_MAX_SGL_LENGTH];
u32 padding;
twa_addr_t padding2;
TW_SG_Entry sgl[TW_ESCALADE_MAX_SGL_LENGTH];
__le32 padding;
twa_addr_t padding2;
} param;
} byte8_offset;
} TW_Command;
/* Command Packet for 9000+ controllers */
typedef struct TAG_TW_Command_Apache {
unsigned char opcode__reserved;
unsigned char unit;
unsigned short request_id__lunl;
unsigned char status;
unsigned char sgl_offset;
unsigned short sgl_entries__lunh;
unsigned char cdb[16];
TW_SG_Entry sg_list[TW_APACHE_MAX_SGL_LENGTH];
unsigned char padding[TW_PADDING_LENGTH];
u8 opcode__reserved;
u8 unit;
__le16 request_id__lunl;
u8 status;
u8 sgl_offset;
__le16 sgl_entries__lunh;
u8 cdb[16];
TW_SG_Entry sg_list[TW_APACHE_MAX_SGL_LENGTH];
u8 padding[TW_PADDING_LENGTH];
} TW_Command_Apache;
/* New command packet header */
typedef struct TAG_TW_Command_Apache_Header {
unsigned char sense_data[TW_SENSE_DATA_LENGTH];
struct {
char reserved[4];
unsigned short error;
unsigned char padding;
unsigned char severity__reserved;
u8 reserved[4];
__le16 error;
u8 padding;
u8 severity__reserved;
} status_block;
unsigned char err_specific_desc[98];
struct {
unsigned char size_header;
unsigned char reserved[2];
unsigned char size_sense;
u8 size_header;
u8 reserved[2];
u8 size_sense;
} header_desc;
} TW_Command_Apache_Header;
@ -565,19 +566,19 @@ typedef struct TAG_TW_Command_Full {
/* Initconnection structure */
typedef struct TAG_TW_Initconnect {
unsigned char opcode__reserved;
unsigned char size;
unsigned char request_id;
unsigned char res2;
unsigned char status;
unsigned char flags;
unsigned short message_credits;
u32 features;
unsigned short fw_srl;
unsigned short fw_arch_id;
unsigned short fw_branch;
unsigned short fw_build;
u32 result;
u8 opcode__reserved;
u8 size;
u8 request_id;
u8 res2;
u8 status;
u8 flags;
__le16 message_credits;
__le32 features;
__le16 fw_srl;
__le16 fw_arch_id;
__le16 fw_branch;
__le16 fw_build;
__le32 result;
} TW_Initconnect;
/* Event info structure */
@ -618,11 +619,11 @@ typedef struct TAG_TW_Lock {
/* GetParam descriptor */
typedef struct {
unsigned short table_id;
unsigned short parameter_id;
unsigned short parameter_size_bytes;
unsigned short actual_parameter_size_bytes;
unsigned char data[];
__le16 table_id;
__le16 parameter_id;
__le16 parameter_size_bytes;
__le16 actual_parameter_size_bytes;
u8 data[];
} TW_Param_Apache, *PTW_Param_Apache;
/* Response queue */