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megaraid_sas : MFI MPT linked list corruption fix

Browse source 
Resending the patch. Addressed the review comments from Tomas Henzl.
Added comment for to-do work.

Problem statement:
MFI link list in megaraid_sas driver is used from mfi-mpt pass-through commands.
This list can be corrupted due to many possible race conditions in driver and
eventually we may see kernel panic.

One example -
MFI frame is freed from calling process as driver send command via polling method and interrupt
for that command comes after driver free mfi frame (actually even after some other context reuse
the mfi frame). When driver receive MPT frame in ISR, driver will be using the index of MFI and
access that MFI frame and finally in-used MFI frame’s list will be corrupted.

High level description of new solution -
Free MFI and MPT command from same context.
Free both the command either from process (from where mfi-mpt pass-through was called) or from
ISR context. Do not split freeing of MFI and MPT, because it creates the race condition which
will do MFI/MPT list corruption.

Renamed the cmd_pool_lock which is used in instance as well as fusion with below name.
mfi_pool_lock and mpt_pool_lock to add more code readability.

Signed-off-by: Sumit Saxena <sumit.saxena@avagotech.com>
Signed-off-by: Kashyap Desai <kashyap.desai@avagotech.com>
Reviewed-by: Tomas Henzl <thenzl@redhat.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sumit.Saxena@avagotech.com 2014-09-12 18:57:58 +05:30 committed by Christoph Hellwig
parent d2552ebe88
commit 90dc9d98f0
4 changed files with 246 additions and 88 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
drivers/scsi/megaraid/megaraid_sas.h
View file

@ -1016,6 +1016,12 @@ struct megasas_ctrl_info {
#define VD_EXT_DEBUG 0 #define VD_EXT_DEBUG 0
enum MR_MFI_MPT_PTHR_FLAGS {
MFI_MPT_DETACHED = 0,
MFI_LIST_ADDED = 1,
MFI_MPT_ATTACHED = 2,
};
/* Frame Type */ /* Frame Type */
#define IO_FRAME 0 #define IO_FRAME 0
#define PTHRU_FRAME 1 #define PTHRU_FRAME 1
@ -1033,7 +1039,7 @@ struct megasas_ctrl_info {
#define MEGASAS_IOCTL_CMD 0 #define MEGASAS_IOCTL_CMD 0
#define MEGASAS_DEFAULT_CMD_TIMEOUT 90 #define MEGASAS_DEFAULT_CMD_TIMEOUT 90
#define MEGASAS_THROTTLE_QUEUE_DEPTH 16 #define MEGASAS_THROTTLE_QUEUE_DEPTH 16
#define MEGASAS_BLOCKED_CMD_TIMEOUT 60
/* /*
* FW reports the maximum of number of commands that it can accept (maximum * FW reports the maximum of number of commands that it can accept (maximum
* commands that can be outstanding) at any time. The driver must report a * commands that can be outstanding) at any time. The driver must report a
@ -1652,7 +1658,7 @@ struct megasas_instance {
struct megasas_cmd **cmd_list; struct megasas_cmd **cmd_list;
struct list_head cmd_pool; struct list_head cmd_pool;
/* used to sync fire the cmd to fw */ /* used to sync fire the cmd to fw */
spinlock_t cmd_pool_lock; spinlock_t mfi_pool_lock;
/* used to sync fire the cmd to fw */ /* used to sync fire the cmd to fw */
spinlock_t hba_lock; spinlock_t hba_lock;
/* used to synch producer, consumer ptrs in dpc */ /* used to synch producer, consumer ptrs in dpc */
@ -1839,6 +1845,11 @@ struct megasas_cmd {
struct list_head list; struct list_head list;
struct scsi_cmnd *scmd; struct scsi_cmnd *scmd;
void *mpt_pthr_cmd_blocked;
atomic_t mfi_mpt_pthr;
u8 is_wait_event;
struct megasas_instance *instance; struct megasas_instance *instance;
union { union {
struct { struct {
@ -1927,4 +1938,14 @@ int megasas_set_crash_dump_params(struct megasas_instance *instance,
void megasas_free_host_crash_buffer(struct megasas_instance *instance); void megasas_free_host_crash_buffer(struct megasas_instance *instance);
void megasas_fusion_crash_dump_wq(struct work_struct *work); void megasas_fusion_crash_dump_wq(struct work_struct *work);
void megasas_return_cmd_fusion(struct megasas_instance *instance,
struct megasas_cmd_fusion *cmd);
int megasas_issue_blocked_cmd(struct megasas_instance *instance,
struct megasas_cmd *cmd, int timeout);
void __megasas_return_cmd(struct megasas_instance *instance,
struct megasas_cmd *cmd);
void megasas_return_mfi_mpt_pthr(struct megasas_instance *instance,
struct megasas_cmd *cmd_mfi, struct megasas_cmd_fusion *cmd_fusion);
#endif /*LSI_MEGARAID_SAS_H */ #endif /*LSI_MEGARAID_SAS_H */

182
drivers/scsi/megaraid/megaraid_sas_base.c
View file

@ -210,20 +210,53 @@ struct megasas_cmd *megasas_get_cmd(struct megasas_instance
unsigned long flags; unsigned long flags;
struct megasas_cmd *cmd = NULL; struct megasas_cmd *cmd = NULL;
spin_lock_irqsave(&instance->cmd_pool_lock, flags); spin_lock_irqsave(&instance->mfi_pool_lock, flags);
if (!list_empty(&instance->cmd_pool)) { if (!list_empty(&instance->cmd_pool)) {
cmd = list_entry((&instance->cmd_pool)->next, cmd = list_entry((&instance->cmd_pool)->next,
struct megasas_cmd, list); struct megasas_cmd, list);
list_del_init(&cmd->list); list_del_init(&cmd->list);
atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_DETACHED);
} else { } else {
printk(KERN_ERR "megasas: Command pool empty!\n"); printk(KERN_ERR "megasas: Command pool empty!\n");
} }
spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
return cmd; return cmd;
} }
/**
* __megasas_return_cmd - Return a cmd to free command pool
* @instance: Adapter soft state
* @cmd: Command packet to be returned to free command pool
*/
inline void
__megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
/*
* Don't go ahead and free the MFI frame, if corresponding
* MPT frame is not freed(valid for only fusion adapters).
* In case of MFI adapters, anyways for any allocated MFI
* frame will have cmd->mfi_mpt_mpthr set to MFI_MPT_DETACHED
*/
if (atomic_read(&cmd->mfi_mpt_pthr) != MFI_MPT_DETACHED)
return;
cmd->scmd = NULL;
cmd->frame_count = 0;
cmd->is_wait_event = 0;
cmd->mpt_pthr_cmd_blocked = NULL;
if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
(instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
(instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
(reset_devices))
cmd->frame->hdr.cmd = MFI_CMD_INVALID;
atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
list_add(&cmd->list, (&instance->cmd_pool)->next);
}
/** /**
* megasas_return_cmd - Return a cmd to free command pool * megasas_return_cmd - Return a cmd to free command pool
* @instance: Adapter soft state * @instance: Adapter soft state
@ -234,19 +267,9 @@ megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
{ {
unsigned long flags; unsigned long flags;
spin_lock_irqsave(&instance->cmd_pool_lock, flags); spin_lock_irqsave(&instance->mfi_pool_lock, flags);
__megasas_return_cmd(instance, cmd);
cmd->scmd = NULL; spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
cmd->frame_count = 0;
if ((instance->pdev->device != PCI_DEVICE_ID_LSI_FUSION) &&
(instance->pdev->device != PCI_DEVICE_ID_LSI_PLASMA) &&
(instance->pdev->device != PCI_DEVICE_ID_LSI_INVADER) &&
(instance->pdev->device != PCI_DEVICE_ID_LSI_FURY) &&
(reset_devices))
cmd->frame->hdr.cmd = MFI_CMD_INVALID;
list_add_tail(&cmd->list, &instance->cmd_pool);
spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
} }
@ -925,13 +948,14 @@ megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
* Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs * Max wait time is MEGASAS_INTERNAL_CMD_WAIT_TIME secs
* Used to issue ioctl commands. * Used to issue ioctl commands.
*/ */
static int int
megasas_issue_blocked_cmd(struct megasas_instance *instance, megasas_issue_blocked_cmd(struct megasas_instance *instance,
struct megasas_cmd *cmd, int timeout) struct megasas_cmd *cmd, int timeout)
{ {
int ret = 0; int ret = 0;
cmd->cmd_status = ENODATA; cmd->cmd_status = ENODATA;
cmd->is_wait_event = 1;
instance->instancet->issue_dcmd(instance, cmd); instance->instancet->issue_dcmd(instance, cmd);
if (timeout) { if (timeout) {
ret = wait_event_timeout(instance->int_cmd_wait_q, ret = wait_event_timeout(instance->int_cmd_wait_q,
@ -1903,6 +1927,11 @@ static int megasas_get_ld_vf_affiliation_111(struct megasas_instance *instance,
new_affiliation_111, new_affiliation_111,
new_affiliation_111_h); new_affiliation_111_h);
} }
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return retval; return retval;
@ -2070,6 +2099,10 @@ static int megasas_get_ld_vf_affiliation_12(struct megasas_instance *instance,
(MAX_LOGICAL_DRIVES + 1) * (MAX_LOGICAL_DRIVES + 1) *
sizeof(struct MR_LD_VF_AFFILIATION), sizeof(struct MR_LD_VF_AFFILIATION),
new_affiliation, new_affiliation_h); new_affiliation, new_affiliation_h);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return retval; return retval;
@ -2530,6 +2563,11 @@ megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
cmd->abort_aen = 0; cmd->abort_aen = 0;
instance->aen_cmd = NULL; instance->aen_cmd = NULL;
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
if ((instance->unload == 0) && if ((instance->unload == 0) &&
@ -2906,7 +2944,8 @@ megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
"failed, status = 0x%x.\n", "failed, status = 0x%x.\n",
cmd->frame->hdr.cmd_status); cmd->frame->hdr.cmd_status);
else { else {
megasas_return_cmd(instance, cmd); megasas_return_mfi_mpt_pthr(instance,
cmd, cmd->mpt_pthr_cmd_blocked);
spin_unlock_irqrestore( spin_unlock_irqrestore(
instance->host->host_lock, instance->host->host_lock,
flags); flags);
@ -2914,7 +2953,8 @@ megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
} }
} else } else
instance->map_id++; instance->map_id++;
megasas_return_cmd(instance, cmd); megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
/* /*
* Set fast path IO to ZERO. * Set fast path IO to ZERO.
@ -3070,7 +3110,7 @@ megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
unsigned long flags; unsigned long flags;
defer_index = 0; defer_index = 0;
spin_lock_irqsave(&instance->cmd_pool_lock, flags); spin_lock_irqsave(&instance->mfi_pool_lock, flags);
for (i = 0; i < max_cmd; i++) { for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i]; cmd = instance->cmd_list[i];
if (cmd->sync_cmd == 1 || cmd->scmd) { if (cmd->sync_cmd == 1 || cmd->scmd) {
@ -3091,7 +3131,7 @@ megasas_internal_reset_defer_cmds(struct megasas_instance *instance)
&instance->internal_reset_pending_q); &instance->internal_reset_pending_q);
} }
} }
spin_unlock_irqrestore(&instance->cmd_pool_lock, flags); spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
} }
@ -3656,7 +3696,9 @@ int megasas_alloc_cmds(struct megasas_instance *instance)
int j; int j;
u32 max_cmd; u32 max_cmd;
struct megasas_cmd *cmd; struct megasas_cmd *cmd;
struct fusion_context *fusion;
fusion = instance->ctrl_context;
max_cmd = instance->max_mfi_cmds; max_cmd = instance->max_mfi_cmds;
/* /*
@ -3689,13 +3731,11 @@ int megasas_alloc_cmds(struct megasas_instance *instance)
} }
} }
/*
* Add all the commands to command pool (instance->cmd_pool)
*/
for (i = 0; i < max_cmd; i++) { for (i = 0; i < max_cmd; i++) {
cmd = instance->cmd_list[i]; cmd = instance->cmd_list[i];
memset(cmd, 0, sizeof(struct megasas_cmd)); memset(cmd, 0, sizeof(struct megasas_cmd));
cmd->index = i; cmd->index = i;
atomic_set(&cmd->mfi_mpt_pthr, MFI_LIST_ADDED);
cmd->scmd = NULL; cmd->scmd = NULL;
cmd->instance = instance; cmd->instance = instance;
@ -3766,11 +3806,11 @@ megasas_get_pd_list(struct megasas_instance *instance)
dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h); dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
dcmd->sgl.sge32[0].length = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST)); dcmd->sgl.sge32[0].length = cpu_to_le32(MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST));
if (!megasas_issue_polled(instance, cmd)) { if (instance->ctrl_context && !instance->mask_interrupts)
ret = 0; ret = megasas_issue_blocked_cmd(instance, cmd,
} else { MEGASAS_BLOCKED_CMD_TIMEOUT);
ret = -1; else
} ret = megasas_issue_polled(instance, cmd);
/* /*
* the following function will get the instance PD LIST. * the following function will get the instance PD LIST.
@ -3802,6 +3842,11 @@ megasas_get_pd_list(struct megasas_instance *instance)
pci_free_consistent(instance->pdev, pci_free_consistent(instance->pdev,
MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST), MEGASAS_MAX_PD * sizeof(struct MR_PD_LIST),
ci, ci_h); ci, ci_h);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return ret; return ret;
@ -3861,11 +3906,12 @@ megasas_get_ld_list(struct megasas_instance *instance)
dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_LIST)); dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_LIST));
dcmd->pad_0 = 0; dcmd->pad_0 = 0;
if (!megasas_issue_polled(instance, cmd)) { if (instance->ctrl_context && !instance->mask_interrupts)
ret = 0; ret = megasas_issue_blocked_cmd(instance, cmd,
} else { MEGASAS_BLOCKED_CMD_TIMEOUT);
ret = -1; else
} ret = megasas_issue_polled(instance, cmd);
ld_count = le32_to_cpu(ci->ldCount); ld_count = le32_to_cpu(ci->ldCount);
@ -3888,6 +3934,10 @@ megasas_get_ld_list(struct megasas_instance *instance)
ci, ci,
ci_h); ci_h);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return ret; return ret;
} }
@ -3949,12 +3999,11 @@ megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST)); dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct MR_LD_TARGETID_LIST));
dcmd->pad_0 = 0; dcmd->pad_0 = 0;
if (!megasas_issue_polled(instance, cmd) && !dcmd->cmd_status) { if (instance->ctrl_context && !instance->mask_interrupts)
ret = 0; ret = megasas_issue_blocked_cmd(instance, cmd,
} else { MEGASAS_BLOCKED_CMD_TIMEOUT);
/* On failure, call older LD list DCMD */ else
ret = 1; ret = megasas_issue_polled(instance, cmd);
}
tgtid_count = le32_to_cpu(ci->count); tgtid_count = le32_to_cpu(ci->count);
@ -3970,6 +4019,10 @@ megasas_ld_list_query(struct megasas_instance *instance, u8 query_type)
pci_free_consistent(instance->pdev, sizeof(struct MR_LD_TARGETID_LIST), pci_free_consistent(instance->pdev, sizeof(struct MR_LD_TARGETID_LIST),
ci, ci_h); ci, ci_h);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return ret; return ret;
@ -4027,16 +4080,22 @@ megasas_get_ctrl_info(struct megasas_instance *instance,
dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_ctrl_info)); dcmd->sgl.sge32[0].length = cpu_to_le32(sizeof(struct megasas_ctrl_info));
dcmd->mbox.b[0] = 1; dcmd->mbox.b[0] = 1;
if (!megasas_issue_polled(instance, cmd)) { if (instance->ctrl_context && !instance->mask_interrupts)
ret = 0; ret = megasas_issue_blocked_cmd(instance, cmd,
MEGASAS_BLOCKED_CMD_TIMEOUT);
else
ret = megasas_issue_polled(instance, cmd);
if (!ret)
memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info)); memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
} else {
ret = -1;
}
pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info), pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
ci, ci_h); ci, ci_h);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return ret; return ret;
} }
@ -4086,10 +4145,16 @@ int megasas_set_crash_dump_params(struct megasas_instance *instance,
dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->crash_dump_h); dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(instance->crash_dump_h);
dcmd->sgl.sge32[0].length = cpu_to_le32(CRASH_DMA_BUF_SIZE); dcmd->sgl.sge32[0].length = cpu_to_le32(CRASH_DMA_BUF_SIZE);
if (!megasas_issue_polled(instance, cmd)) if (instance->ctrl_context && !instance->mask_interrupts)
ret = 0; ret = megasas_issue_blocked_cmd(instance, cmd,
MEGASAS_BLOCKED_CMD_TIMEOUT);
else
ret = megasas_issue_polled(instance, cmd);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else else
ret = -1;
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return ret; return ret;
} }
@ -4660,6 +4725,10 @@ megasas_get_seq_num(struct megasas_instance *instance,
pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info), pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
el_info, el_info_h); el_info, el_info_h);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return 0; return 0;
@ -5015,7 +5084,7 @@ static int megasas_probe_one(struct pci_dev *pdev,
} }
fusion = instance->ctrl_context; fusion = instance->ctrl_context;
INIT_LIST_HEAD(&fusion->cmd_pool); INIT_LIST_HEAD(&fusion->cmd_pool);
spin_lock_init(&fusion->cmd_pool_lock); spin_lock_init(&fusion->mpt_pool_lock);
memset(fusion->load_balance_info, 0, memset(fusion->load_balance_info, 0,
sizeof(struct LD_LOAD_BALANCE_INFO) * MAX_LOGICAL_DRIVES_EXT); sizeof(struct LD_LOAD_BALANCE_INFO) * MAX_LOGICAL_DRIVES_EXT);
} }
@ -5086,7 +5155,7 @@ static int megasas_probe_one(struct pci_dev *pdev,
init_waitqueue_head(&instance->int_cmd_wait_q); init_waitqueue_head(&instance->int_cmd_wait_q);
init_waitqueue_head(&instance->abort_cmd_wait_q); init_waitqueue_head(&instance->abort_cmd_wait_q);
spin_lock_init(&instance->cmd_pool_lock); spin_lock_init(&instance->mfi_pool_lock);
spin_lock_init(&instance->hba_lock); spin_lock_init(&instance->hba_lock);
spin_lock_init(&instance->completion_lock); spin_lock_init(&instance->completion_lock);
@ -5106,7 +5175,7 @@ static int megasas_probe_one(struct pci_dev *pdev,
instance->flag_ieee = 1; instance->flag_ieee = 1;
sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS); sema_init(&instance->ioctl_sem, MEGASAS_SKINNY_INT_CMDS);
} else } else
sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS); sema_init(&instance->ioctl_sem, (MEGASAS_INT_CMDS - 5));
megasas_dbg_lvl = 0; megasas_dbg_lvl = 0;
instance->flag = 0; instance->flag = 0;
@ -5318,6 +5387,10 @@ static void megasas_flush_cache(struct megasas_instance *instance)
dev_err(&instance->pdev->dev, "Command timedout" dev_err(&instance->pdev->dev, "Command timedout"
" from %s\n", __func__); " from %s\n", __func__);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return; return;
@ -5365,6 +5438,10 @@ static void megasas_shutdown_controller(struct megasas_instance *instance,
dev_err(&instance->pdev->dev, "Command timedout" dev_err(&instance->pdev->dev, "Command timedout"
"from %s\n", __func__); "from %s\n", __func__);
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return; return;
@ -6026,8 +6103,13 @@ megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
le32_to_cpu(kern_sge32[i].length), le32_to_cpu(kern_sge32[i].length),
kbuff_arr[i], kbuff_arr[i],
le32_to_cpu(kern_sge32[i].phys_addr)); le32_to_cpu(kern_sge32[i].phys_addr));
kbuff_arr[i] = NULL;
} }
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return error; return error;
} }

97
drivers/scsi/megaraid/megaraid_sas_fusion.c
View file

@ -50,6 +50,7 @@
#include <scsi/scsi_cmnd.h> #include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h> #include <scsi/scsi_device.h>
#include <scsi/scsi_host.h> #include <scsi/scsi_host.h>
#include <scsi/scsi_dbg.h>
#include "megaraid_sas_fusion.h" #include "megaraid_sas_fusion.h"
#include "megaraid_sas.h" #include "megaraid_sas.h"
@ -163,7 +164,7 @@ struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
(struct fusion_context *)instance->ctrl_context; (struct fusion_context *)instance->ctrl_context;
struct megasas_cmd_fusion *cmd = NULL; struct megasas_cmd_fusion *cmd = NULL;
spin_lock_irqsave(&fusion->cmd_pool_lock, flags); spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
if (!list_empty(&fusion->cmd_pool)) { if (!list_empty(&fusion->cmd_pool)) {
cmd = list_entry((&fusion->cmd_pool)->next, cmd = list_entry((&fusion->cmd_pool)->next,
@ -173,7 +174,7 @@ struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
printk(KERN_ERR "megasas: Command pool (fusion) empty!\n"); printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
} }
spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags); spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
return cmd; return cmd;
} }
@ -182,21 +183,47 @@ struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
* @instance: Adapter soft state * @instance: Adapter soft state
* @cmd: Command packet to be returned to free command pool * @cmd: Command packet to be returned to free command pool
*/ */
static inline void inline void megasas_return_cmd_fusion(struct megasas_instance *instance,
megasas_return_cmd_fusion(struct megasas_instance *instance,
struct megasas_cmd_fusion *cmd) struct megasas_cmd_fusion *cmd)
{ {
unsigned long flags; unsigned long flags;
struct fusion_context *fusion = struct fusion_context *fusion =
(struct fusion_context *)instance->ctrl_context; (struct fusion_context *)instance->ctrl_context;
spin_lock_irqsave(&fusion->cmd_pool_lock, flags); spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
cmd->scmd = NULL; cmd->scmd = NULL;
cmd->sync_cmd_idx = (u32)ULONG_MAX; cmd->sync_cmd_idx = (u32)ULONG_MAX;
list_add_tail(&cmd->list, &fusion->cmd_pool); list_add(&cmd->list, (&fusion->cmd_pool)->next);
spin_unlock_irqrestore(&fusion->cmd_pool_lock, flags); spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
}
/**
* megasas_return_mfi_mpt_pthr - Return a mfi and mpt to free command pool
* @instance: Adapter soft state
* @cmd_mfi: MFI Command packet to be returned to free command pool
* @cmd_mpt: MPT Command packet to be returned to free command pool
*/
inline void megasas_return_mfi_mpt_pthr(struct megasas_instance *instance,
struct megasas_cmd *cmd_mfi,
struct megasas_cmd_fusion *cmd_fusion)
{
unsigned long flags;
/*
* TO DO: optimize this code and use only one lock instead of two
* locks being used currently- mpt_pool_lock is acquired
* inside mfi_pool_lock
*/
spin_lock_irqsave(&instance->mfi_pool_lock, flags);
megasas_return_cmd_fusion(instance, cmd_fusion);
if (atomic_read(&cmd_mfi->mfi_mpt_pthr) != MFI_MPT_ATTACHED)
dev_err(&instance->pdev->dev, "Possible bug from %s %d\n",
__func__, __LINE__);
atomic_set(&cmd_mfi->mfi_mpt_pthr, MFI_MPT_DETACHED);
__megasas_return_cmd(instance, cmd_mfi);
spin_unlock_irqrestore(&instance->mfi_pool_lock, flags);
} }
/** /**
@ -562,9 +589,11 @@ wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
{ {
int i; int i;
struct megasas_header *frame_hdr = &cmd->frame->hdr; struct megasas_header *frame_hdr = &cmd->frame->hdr;
struct fusion_context *fusion;
u32 msecs = seconds * 1000; u32 msecs = seconds * 1000;
fusion = instance->ctrl_context;
/* /*
* Wait for cmd_status to change * Wait for cmd_status to change
*/ */
@ -573,8 +602,12 @@ wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
msleep(20); msleep(20);
} }
if (frame_hdr->cmd_status == 0xff) if (frame_hdr->cmd_status == 0xff) {
if (fusion)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
return -ETIME; return -ETIME;
}
return 0; return 0;
} }
@ -777,13 +810,16 @@ megasas_get_ld_map_info(struct megasas_instance *instance)
dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h); dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info); dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
if (!megasas_issue_polled(instance, cmd)) if (instance->ctrl_context && !instance->mask_interrupts)
ret = 0; ret = megasas_issue_blocked_cmd(instance, cmd,
else { MEGASAS_BLOCKED_CMD_TIMEOUT);
printk(KERN_ERR "megasas: Get LD Map Info Failed\n"); else
ret = -1; ret = megasas_issue_polled(instance, cmd);
}
if (instance->ctrl_context && cmd->mpt_pthr_cmd_blocked)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
else
megasas_return_cmd(instance, cmd); megasas_return_cmd(instance, cmd);
return ret; return ret;
@ -2018,10 +2054,19 @@ complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
break; break;
case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */ case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx]; cmd_mfi = instance->cmd_list[cmd_fusion->sync_cmd_idx];
if (!cmd_mfi->mpt_pthr_cmd_blocked) {
if (megasas_dbg_lvl == 5)
dev_info(&instance->pdev->dev,
"freeing mfi/mpt pass-through "
"from %s %d\n",
__func__, __LINE__);
megasas_return_mfi_mpt_pthr(instance, cmd_mfi,
cmd_fusion);
}
megasas_complete_cmd(instance, cmd_mfi, DID_OK); megasas_complete_cmd(instance, cmd_mfi, DID_OK);
cmd_fusion->flags = 0; cmd_fusion->flags = 0;
megasas_return_cmd_fusion(instance, cmd_fusion);
break; break;
} }
@ -2181,6 +2226,7 @@ build_mpt_mfi_pass_thru(struct megasas_instance *instance,
struct megasas_cmd_fusion *cmd; struct megasas_cmd_fusion *cmd;
struct fusion_context *fusion; struct fusion_context *fusion;
struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr; struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
u32 opcode;
cmd = megasas_get_cmd_fusion(instance); cmd = megasas_get_cmd_fusion(instance);
if (!cmd) if (!cmd)
@ -2188,9 +2234,20 @@ build_mpt_mfi_pass_thru(struct megasas_instance *instance,
/* Save the smid. To be used for returning the cmd */ /* Save the smid. To be used for returning the cmd */
mfi_cmd->context.smid = cmd->index; mfi_cmd->context.smid = cmd->index;
cmd->sync_cmd_idx = mfi_cmd->index; cmd->sync_cmd_idx = mfi_cmd->index;
/* Set this only for Blocked commands */
opcode = le32_to_cpu(mfi_cmd->frame->dcmd.opcode);
if ((opcode == MR_DCMD_LD_MAP_GET_INFO)
&& (mfi_cmd->frame->dcmd.mbox.b[1] == 1))
mfi_cmd->is_wait_event = 1;
if (opcode == MR_DCMD_CTRL_EVENT_WAIT)
mfi_cmd->is_wait_event = 1;
if (mfi_cmd->is_wait_event)
mfi_cmd->mpt_pthr_cmd_blocked = cmd;
/* /*
* For cmds where the flag is set, store the flag and check * For cmds where the flag is set, store the flag and check
* on completion. For cmds with this flag, don't call * on completion. For cmds with this flag, don't call
@ -2279,6 +2336,7 @@ megasas_issue_dcmd_fusion(struct megasas_instance *instance,
printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n"); printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
return; return;
} }
atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_ATTACHED);
instance->instancet->fire_cmd(instance, req_desc->u.low, instance->instancet->fire_cmd(instance, req_desc->u.low,
req_desc->u.high, instance->reg_set); req_desc->u.high, instance->reg_set);
} }
@ -2750,10 +2808,7 @@ int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
cmd_list[cmd_fusion->sync_cmd_idx]; cmd_list[cmd_fusion->sync_cmd_idx];
if (cmd_mfi->frame->dcmd.opcode == if (cmd_mfi->frame->dcmd.opcode ==
cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO)) { cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO)) {
megasas_return_cmd(instance, megasas_return_mfi_mpt_pthr(instance, cmd_mfi, cmd_fusion);
cmd_mfi);
megasas_return_cmd_fusion(
instance, cmd_fusion);
} else { } else {
req_desc = req_desc =
megasas_get_request_descriptor( megasas_get_request_descriptor(

2
drivers/scsi/megaraid/megaraid_sas_fusion.h
View file

@ -797,7 +797,7 @@ struct fusion_context {
struct megasas_cmd_fusion **cmd_list; struct megasas_cmd_fusion **cmd_list;
struct list_head cmd_pool; struct list_head cmd_pool;
spinlock_t cmd_pool_lock; spinlock_t mpt_pool_lock;
dma_addr_t req_frames_desc_phys; dma_addr_t req_frames_desc_phys;
u8 *req_frames_desc; u8 *req_frames_desc;