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90dc9d98f0
linux/drivers/scsi/megaraid/megaraid_sas_fusion.c
Sumit.Saxena@avagotech.com 90dc9d98f0 megaraid_sas : MFI MPT linked list corruption fix 
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>
2014-09-16 09:19:28 -07:00

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/*
* Linux MegaRAID driver for SAS based RAID controllers
*
* Copyright (c) 2009-2012 LSI Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* FILE: megaraid_sas_fusion.c
*
* Authors: LSI Corporation
* Sumant Patro
* Adam Radford <linuxraid@lsi.com>
*
* Send feedback to: <megaraidlinux@lsi.com>
*
* Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
* ATTN: Linuxraid
*/
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/pci.h>
#include <linux/list.h>
#include <linux/moduleparam.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/uio.h>
#include <linux/uaccess.h>
#include <linux/fs.h>
#include <linux/compat.h>
#include <linux/blkdev.h>
#include <linux/mutex.h>
#include <linux/poll.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_dbg.h>
#include "megaraid_sas_fusion.h"
#include "megaraid_sas.h"
extern void megasas_free_cmds(struct megasas_instance *instance);
extern struct megasas_cmd *megasas_get_cmd(struct megasas_instance
*instance);
extern void
megasas_complete_cmd(struct megasas_instance *instance,
struct megasas_cmd *cmd, u8 alt_status);
int megasas_is_ldio(struct scsi_cmnd *cmd);
int
wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
int seconds);
void
megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd);
int megasas_alloc_cmds(struct megasas_instance *instance);
int
megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs);
int
megasas_issue_polled(struct megasas_instance *instance,
struct megasas_cmd *cmd);
void
megasas_check_and_restore_queue_depth(struct megasas_instance *instance);
int megasas_transition_to_ready(struct megasas_instance *instance, int ocr);
void megaraid_sas_kill_hba(struct megasas_instance *instance);
extern u32 megasas_dbg_lvl;
void megasas_sriov_heartbeat_handler(unsigned long instance_addr);
int megasas_sriov_start_heartbeat(struct megasas_instance *instance,
int initial);
void megasas_start_timer(struct megasas_instance *instance,
struct timer_list *timer,
void *fn, unsigned long interval);
extern struct megasas_mgmt_info megasas_mgmt_info;
extern int resetwaittime;
/**
* megasas_enable_intr_fusion - Enables interrupts
* @regs: MFI register set
*/
void
megasas_enable_intr_fusion(struct megasas_instance *instance)
{
struct megasas_register_set __iomem *regs;
regs = instance->reg_set;
/* For Thunderbolt/Invader also clear intr on enable */
writel(~0, &regs->outbound_intr_status);
readl(&regs->outbound_intr_status);
writel(~MFI_FUSION_ENABLE_INTERRUPT_MASK, &(regs)->outbound_intr_mask);
/* Dummy readl to force pci flush */
readl(&regs->outbound_intr_mask);
instance->mask_interrupts = 0;
}
/**
* megasas_disable_intr_fusion - Disables interrupt
* @regs: MFI register set
*/
void
megasas_disable_intr_fusion(struct megasas_instance *instance)
{
u32 mask = 0xFFFFFFFF;
u32 status;
struct megasas_register_set __iomem *regs;
regs = instance->reg_set;
instance->mask_interrupts = 1;
writel(mask, &regs->outbound_intr_mask);
/* Dummy readl to force pci flush */
status = readl(&regs->outbound_intr_mask);
}
int
megasas_clear_intr_fusion(struct megasas_register_set __iomem *regs)
{
u32 status;
/*
* Check if it is our interrupt
*/
status = readl(&regs->outbound_intr_status);
if (status & 1) {
writel(status, &regs->outbound_intr_status);
readl(&regs->outbound_intr_status);
return 1;
}
if (!(status & MFI_FUSION_ENABLE_INTERRUPT_MASK))
return 0;
return 1;
}
/**
* megasas_get_cmd_fusion - Get a command from the free pool
* @instance: Adapter soft state
*
* Returns a free command from the pool
*/
struct megasas_cmd_fusion *megasas_get_cmd_fusion(struct megasas_instance
*instance)
{
unsigned long flags;
struct fusion_context *fusion =
(struct fusion_context *)instance->ctrl_context;
struct megasas_cmd_fusion *cmd = NULL;
spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
if (!list_empty(&fusion->cmd_pool)) {
cmd = list_entry((&fusion->cmd_pool)->next,
struct megasas_cmd_fusion, list);
list_del_init(&cmd->list);
} else {
printk(KERN_ERR "megasas: Command pool (fusion) empty!\n");
}
spin_unlock_irqrestore(&fusion->mpt_pool_lock, flags);
return cmd;
}
/**
* megasas_return_cmd_fusion - 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_fusion(struct megasas_instance *instance,
struct megasas_cmd_fusion *cmd)
{
unsigned long flags;
struct fusion_context *fusion =
(struct fusion_context *)instance->ctrl_context;
spin_lock_irqsave(&fusion->mpt_pool_lock, flags);
cmd->scmd = NULL;
cmd->sync_cmd_idx = (u32)ULONG_MAX;
list_add(&cmd->list, (&fusion->cmd_pool)->next);
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);
}
/**
* megasas_teardown_frame_pool_fusion - Destroy the cmd frame DMA pool
* @instance: Adapter soft state
*/
static void megasas_teardown_frame_pool_fusion(
struct megasas_instance *instance)
{
int i;
struct fusion_context *fusion = instance->ctrl_context;
u16 max_cmd = instance->max_fw_cmds;
struct megasas_cmd_fusion *cmd;
if (!fusion->sg_dma_pool || !fusion->sense_dma_pool) {
printk(KERN_ERR "megasas: dma pool is null. SG Pool %p, "
"sense pool : %p\n", fusion->sg_dma_pool,
fusion->sense_dma_pool);
return;
}
/*
* Return all frames to pool
*/
for (i = 0; i < max_cmd; i++) {
cmd = fusion->cmd_list[i];
if (cmd->sg_frame)
pci_pool_free(fusion->sg_dma_pool, cmd->sg_frame,
cmd->sg_frame_phys_addr);
if (cmd->sense)
pci_pool_free(fusion->sense_dma_pool, cmd->sense,
cmd->sense_phys_addr);
}
/*
* Now destroy the pool itself
*/
pci_pool_destroy(fusion->sg_dma_pool);
pci_pool_destroy(fusion->sense_dma_pool);
fusion->sg_dma_pool = NULL;
fusion->sense_dma_pool = NULL;
}
/**
* megasas_free_cmds_fusion - Free all the cmds in the free cmd pool
* @instance: Adapter soft state
*/
void
megasas_free_cmds_fusion(struct megasas_instance *instance)
{
int i;
struct fusion_context *fusion = instance->ctrl_context;
u32 max_cmds, req_sz, reply_sz, io_frames_sz;
req_sz = fusion->request_alloc_sz;
reply_sz = fusion->reply_alloc_sz;
io_frames_sz = fusion->io_frames_alloc_sz;
max_cmds = instance->max_fw_cmds;
/* Free descriptors and request Frames memory */
if (fusion->req_frames_desc)
dma_free_coherent(&instance->pdev->dev, req_sz,
fusion->req_frames_desc,
fusion->req_frames_desc_phys);
if (fusion->reply_frames_desc) {
pci_pool_free(fusion->reply_frames_desc_pool,
fusion->reply_frames_desc,
fusion->reply_frames_desc_phys);
pci_pool_destroy(fusion->reply_frames_desc_pool);
}
if (fusion->io_request_frames) {
pci_pool_free(fusion->io_request_frames_pool,
fusion->io_request_frames,
fusion->io_request_frames_phys);
pci_pool_destroy(fusion->io_request_frames_pool);
}
/* Free the Fusion frame pool */
megasas_teardown_frame_pool_fusion(instance);
/* Free all the commands in the cmd_list */
for (i = 0; i < max_cmds; i++)
kfree(fusion->cmd_list[i]);
/* Free the cmd_list buffer itself */
kfree(fusion->cmd_list);
fusion->cmd_list = NULL;
INIT_LIST_HEAD(&fusion->cmd_pool);
}
/**
* megasas_create_frame_pool_fusion - Creates DMA pool for cmd frames
* @instance: Adapter soft state
*
*/
static int megasas_create_frame_pool_fusion(struct megasas_instance *instance)
{
int i;
u32 max_cmd;
struct fusion_context *fusion;
struct megasas_cmd_fusion *cmd;
u32 total_sz_chain_frame;
fusion = instance->ctrl_context;
max_cmd = instance->max_fw_cmds;
total_sz_chain_frame = MEGASAS_MAX_SZ_CHAIN_FRAME;
/*
* Use DMA pool facility provided by PCI layer
*/
fusion->sg_dma_pool = pci_pool_create("megasas sg pool fusion",
instance->pdev,
total_sz_chain_frame, 4,
0);
if (!fusion->sg_dma_pool) {
printk(KERN_DEBUG "megasas: failed to setup request pool "
"fusion\n");
return -ENOMEM;
}
fusion->sense_dma_pool = pci_pool_create("megasas sense pool fusion",
instance->pdev,
SCSI_SENSE_BUFFERSIZE, 64, 0);
if (!fusion->sense_dma_pool) {
printk(KERN_DEBUG "megasas: failed to setup sense pool "
"fusion\n");
pci_pool_destroy(fusion->sg_dma_pool);
fusion->sg_dma_pool = NULL;
return -ENOMEM;
}
/*
* Allocate and attach a frame to each of the commands in cmd_list
*/
for (i = 0; i < max_cmd; i++) {
cmd = fusion->cmd_list[i];
cmd->sg_frame = pci_pool_alloc(fusion->sg_dma_pool,
GFP_KERNEL,
&cmd->sg_frame_phys_addr);
cmd->sense = pci_pool_alloc(fusion->sense_dma_pool,
GFP_KERNEL, &cmd->sense_phys_addr);
/*
* megasas_teardown_frame_pool_fusion() takes care of freeing
* whatever has been allocated
*/
if (!cmd->sg_frame || !cmd->sense) {
printk(KERN_DEBUG "megasas: pci_pool_alloc failed\n");
megasas_teardown_frame_pool_fusion(instance);
return -ENOMEM;
}
}
return 0;
}
/**
* megasas_alloc_cmds_fusion - Allocates the command packets
* @instance: Adapter soft state
*
*
* Each frame has a 32-bit field called context. This context is used to get
* back the megasas_cmd_fusion from the frame when a frame gets completed
* In this driver, the 32 bit values are the indices into an array cmd_list.
* This array is used only to look up the megasas_cmd_fusion given the context.
* The free commands themselves are maintained in a linked list called cmd_pool.
*
* cmds are formed in the io_request and sg_frame members of the
* megasas_cmd_fusion. The context field is used to get a request descriptor
* and is used as SMID of the cmd.
* SMID value range is from 1 to max_fw_cmds.
*/
int
megasas_alloc_cmds_fusion(struct megasas_instance *instance)
{
int i, j, count;
u32 max_cmd, io_frames_sz;
struct fusion_context *fusion;
struct megasas_cmd_fusion *cmd;
union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
u32 offset;
dma_addr_t io_req_base_phys;
u8 *io_req_base;
fusion = instance->ctrl_context;
max_cmd = instance->max_fw_cmds;
fusion->req_frames_desc =
dma_alloc_coherent(&instance->pdev->dev,
fusion->request_alloc_sz,
&fusion->req_frames_desc_phys, GFP_KERNEL);
if (!fusion->req_frames_desc) {
printk(KERN_ERR "megasas; Could not allocate memory for "
"request_frames\n");
goto fail_req_desc;
}
count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
fusion->reply_frames_desc_pool =
pci_pool_create("reply_frames pool", instance->pdev,
fusion->reply_alloc_sz * count, 16, 0);
if (!fusion->reply_frames_desc_pool) {
printk(KERN_ERR "megasas; Could not allocate memory for "
"reply_frame pool\n");
goto fail_reply_desc;
}
fusion->reply_frames_desc =
pci_pool_alloc(fusion->reply_frames_desc_pool, GFP_KERNEL,
&fusion->reply_frames_desc_phys);
if (!fusion->reply_frames_desc) {
printk(KERN_ERR "megasas; Could not allocate memory for "
"reply_frame pool\n");
pci_pool_destroy(fusion->reply_frames_desc_pool);
goto fail_reply_desc;
}
reply_desc = fusion->reply_frames_desc;
for (i = 0; i < fusion->reply_q_depth * count; i++, reply_desc++)
reply_desc->Words = ULLONG_MAX;
io_frames_sz = fusion->io_frames_alloc_sz;
fusion->io_request_frames_pool =
pci_pool_create("io_request_frames pool", instance->pdev,
fusion->io_frames_alloc_sz, 16, 0);
if (!fusion->io_request_frames_pool) {
printk(KERN_ERR "megasas: Could not allocate memory for "
"io_request_frame pool\n");
goto fail_io_frames;
}
fusion->io_request_frames =
pci_pool_alloc(fusion->io_request_frames_pool, GFP_KERNEL,
&fusion->io_request_frames_phys);
if (!fusion->io_request_frames) {
printk(KERN_ERR "megasas: Could not allocate memory for "
"io_request_frames frames\n");
pci_pool_destroy(fusion->io_request_frames_pool);
goto fail_io_frames;
}
/*
* fusion->cmd_list is an array of struct megasas_cmd_fusion pointers.
* Allocate the dynamic array first and then allocate individual
* commands.
*/
fusion->cmd_list = kzalloc(sizeof(struct megasas_cmd_fusion *)
* max_cmd, GFP_KERNEL);
if (!fusion->cmd_list) {
printk(KERN_DEBUG "megasas: out of memory. Could not alloc "
"memory for cmd_list_fusion\n");
goto fail_cmd_list;
}
max_cmd = instance->max_fw_cmds;
for (i = 0; i < max_cmd; i++) {
fusion->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd_fusion),
GFP_KERNEL);
if (!fusion->cmd_list[i]) {
printk(KERN_ERR "Could not alloc cmd list fusion\n");
for (j = 0; j < i; j++)
kfree(fusion->cmd_list[j]);
kfree(fusion->cmd_list);
fusion->cmd_list = NULL;
goto fail_cmd_list;
}
}
/* The first 256 bytes (SMID 0) is not used. Don't add to cmd list */
io_req_base = fusion->io_request_frames +
MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
io_req_base_phys = fusion->io_request_frames_phys +
MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE;
/*
* Add all the commands to command pool (fusion->cmd_pool)
*/
/* SMID 0 is reserved. Set SMID/index from 1 */
for (i = 0; i < max_cmd; i++) {
cmd = fusion->cmd_list[i];
offset = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE * i;
memset(cmd, 0, sizeof(struct megasas_cmd_fusion));
cmd->index = i + 1;
cmd->scmd = NULL;
cmd->sync_cmd_idx = (u32)ULONG_MAX; /* Set to Invalid */
cmd->instance = instance;
cmd->io_request =
(struct MPI2_RAID_SCSI_IO_REQUEST *)
(io_req_base + offset);
memset(cmd->io_request, 0,
sizeof(struct MPI2_RAID_SCSI_IO_REQUEST));
cmd->io_request_phys_addr = io_req_base_phys + offset;
list_add_tail(&cmd->list, &fusion->cmd_pool);
}
/*
* Create a frame pool and assign one frame to each cmd
*/
if (megasas_create_frame_pool_fusion(instance)) {
printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
megasas_free_cmds_fusion(instance);
goto fail_req_desc;
}
return 0;
fail_cmd_list:
pci_pool_free(fusion->io_request_frames_pool, fusion->io_request_frames,
fusion->io_request_frames_phys);
pci_pool_destroy(fusion->io_request_frames_pool);
fail_io_frames:
dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
fusion->reply_frames_desc,
fusion->reply_frames_desc_phys);
pci_pool_free(fusion->reply_frames_desc_pool,
fusion->reply_frames_desc,
fusion->reply_frames_desc_phys);
pci_pool_destroy(fusion->reply_frames_desc_pool);
fail_reply_desc:
dma_free_coherent(&instance->pdev->dev, fusion->request_alloc_sz,
fusion->req_frames_desc,
fusion->req_frames_desc_phys);
fail_req_desc:
return -ENOMEM;
}
/**
* wait_and_poll - Issues a polling command
* @instance: Adapter soft state
* @cmd: Command packet to be issued
*
* For polling, MFI requires the cmd_status to be set to 0xFF before posting.
*/
int
wait_and_poll(struct megasas_instance *instance, struct megasas_cmd *cmd,
int seconds)
{
int i;
struct megasas_header *frame_hdr = &cmd->frame->hdr;
struct fusion_context *fusion;
u32 msecs = seconds * 1000;
fusion = instance->ctrl_context;
/*
* Wait for cmd_status to change
*/
for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i += 20) {
rmb();
msleep(20);
}
if (frame_hdr->cmd_status == 0xff) {
if (fusion)
megasas_return_mfi_mpt_pthr(instance, cmd,
cmd->mpt_pthr_cmd_blocked);
return -ETIME;
}
return 0;
}
/**
* megasas_ioc_init_fusion - Initializes the FW
* @instance: Adapter soft state
*
* Issues the IOC Init cmd
*/
int
megasas_ioc_init_fusion(struct megasas_instance *instance)
{
struct megasas_init_frame *init_frame;
struct MPI2_IOC_INIT_REQUEST *IOCInitMessage;
dma_addr_t ioc_init_handle;
struct megasas_cmd *cmd;
u8 ret;
struct fusion_context *fusion;
union MEGASAS_REQUEST_DESCRIPTOR_UNION req_desc;
int i;
struct megasas_header *frame_hdr;
fusion = instance->ctrl_context;
cmd = megasas_get_cmd(instance);
if (!cmd) {
printk(KERN_ERR "Could not allocate cmd for INIT Frame\n");
ret = 1;
goto fail_get_cmd;
}
IOCInitMessage =
dma_alloc_coherent(&instance->pdev->dev,
sizeof(struct MPI2_IOC_INIT_REQUEST),
&ioc_init_handle, GFP_KERNEL);
if (!IOCInitMessage) {
printk(KERN_ERR "Could not allocate memory for "
"IOCInitMessage\n");
ret = 1;
goto fail_fw_init;
}
memset(IOCInitMessage, 0, sizeof(struct MPI2_IOC_INIT_REQUEST));
IOCInitMessage->Function = MPI2_FUNCTION_IOC_INIT;
IOCInitMessage->WhoInit = MPI2_WHOINIT_HOST_DRIVER;
IOCInitMessage->MsgVersion = cpu_to_le16(MPI2_VERSION);
IOCInitMessage->HeaderVersion = cpu_to_le16(MPI2_HEADER_VERSION);
IOCInitMessage->SystemRequestFrameSize = cpu_to_le16(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE / 4);
IOCInitMessage->ReplyDescriptorPostQueueDepth = cpu_to_le16(fusion->reply_q_depth);
IOCInitMessage->ReplyDescriptorPostQueueAddress = cpu_to_le64(fusion->reply_frames_desc_phys);
IOCInitMessage->SystemRequestFrameBaseAddress = cpu_to_le64(fusion->io_request_frames_phys);
IOCInitMessage->HostMSIxVectors = instance->msix_vectors;
init_frame = (struct megasas_init_frame *)cmd->frame;
memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
frame_hdr = &cmd->frame->hdr;
frame_hdr->cmd_status = 0xFF;
frame_hdr->flags |= cpu_to_le16(MFI_FRAME_DONT_POST_IN_REPLY_QUEUE);
init_frame->cmd = MFI_CMD_INIT;
init_frame->cmd_status = 0xFF;
/* driver support Extended MSIX */
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
init_frame->driver_operations.
mfi_capabilities.support_additional_msix = 1;
/* driver supports HA / Remote LUN over Fast Path interface */
init_frame->driver_operations.mfi_capabilities.support_fp_remote_lun
= 1;
init_frame->driver_operations.mfi_capabilities.support_max_255lds
= 1;
init_frame->driver_operations.mfi_capabilities.support_ndrive_r1_lb
= 1;
/* Convert capability to LE32 */
cpu_to_le32s((u32 *)&init_frame->driver_operations.mfi_capabilities);
init_frame->queue_info_new_phys_addr_hi =
cpu_to_le32(upper_32_bits(ioc_init_handle));
init_frame->queue_info_new_phys_addr_lo =
cpu_to_le32(lower_32_bits(ioc_init_handle));
init_frame->data_xfer_len = cpu_to_le32(sizeof(struct MPI2_IOC_INIT_REQUEST));
req_desc.Words = 0;
req_desc.MFAIo.RequestFlags =
(MEGASAS_REQ_DESCRIPT_FLAGS_MFA <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
cpu_to_le32s((u32 *)&req_desc.MFAIo);
req_desc.Words |= cpu_to_le64(cmd->frame_phys_addr);
/*
* disable the intr before firing the init frame
*/
instance->instancet->disable_intr(instance);
for (i = 0; i < (10 * 1000); i += 20) {
if (readl(&instance->reg_set->doorbell) & 1)
msleep(20);
else
break;
}
instance->instancet->fire_cmd(instance, req_desc.u.low,
req_desc.u.high, instance->reg_set);
wait_and_poll(instance, cmd, MFI_POLL_TIMEOUT_SECS);
frame_hdr = &cmd->frame->hdr;
if (frame_hdr->cmd_status != 0) {
ret = 1;
goto fail_fw_init;
}
printk(KERN_ERR "megasas:IOC Init cmd success\n");
ret = 0;
fail_fw_init:
megasas_return_cmd(instance, cmd);
if (IOCInitMessage)
dma_free_coherent(&instance->pdev->dev,
sizeof(struct MPI2_IOC_INIT_REQUEST),
IOCInitMessage, ioc_init_handle);
fail_get_cmd:
return ret;
}
/*
* megasas_get_ld_map_info - Returns FW's ld_map structure
* @instance: Adapter soft state
* @pend: Pend the command or not
* Issues an internal command (DCMD) to get the FW's controller PD
* list structure. This information is mainly used to find out SYSTEM
* supported by the FW.
* dcmd.mbox value setting for MR_DCMD_LD_MAP_GET_INFO
* dcmd.mbox.b[0] - number of LDs being sync'd
* dcmd.mbox.b[1] - 0 - complete command immediately.
* - 1 - pend till config change
* dcmd.mbox.b[2] - 0 - supports max 64 lds and uses legacy MR_FW_RAID_MAP
* - 1 - supports max MAX_LOGICAL_DRIVES_EXT lds and
* uses extended struct MR_FW_RAID_MAP_EXT
*/
static int
megasas_get_ld_map_info(struct megasas_instance *instance)
{
int ret = 0;
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
void *ci;
dma_addr_t ci_h = 0;
u32 size_map_info;
struct fusion_context *fusion;
cmd = megasas_get_cmd(instance);
if (!cmd) {
printk(KERN_DEBUG "megasas: Failed to get cmd for map info.\n");
return -ENOMEM;
}
fusion = instance->ctrl_context;
if (!fusion) {
megasas_return_cmd(instance, cmd);
return -ENXIO;
}
dcmd = &cmd->frame->dcmd;
size_map_info = fusion->current_map_sz;
ci = (void *) fusion->ld_map[(instance->map_id & 1)];
ci_h = fusion->ld_map_phys[(instance->map_id & 1)];
if (!ci) {
printk(KERN_DEBUG "Failed to alloc mem for ld_map_info\n");
megasas_return_cmd(instance, cmd);
return -ENOMEM;
}
memset(ci, 0, fusion->max_map_sz);
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
#if VD_EXT_DEBUG
dev_dbg(&instance->pdev->dev,
"%s sending MR_DCMD_LD_MAP_GET_INFO with size %d\n",
__func__, cpu_to_le32(size_map_info));
#endif
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0xFF;
dcmd->sge_count = 1;
dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_READ);
dcmd->timeout = 0;
dcmd->pad_0 = 0;
dcmd->data_xfer_len = cpu_to_le32(size_map_info);
dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
if (instance->ctrl_context && !instance->mask_interrupts)
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
megasas_return_cmd(instance, cmd);
return ret;
}
u8
megasas_get_map_info(struct megasas_instance *instance)
{
struct fusion_context *fusion = instance->ctrl_context;
fusion->fast_path_io = 0;
if (!megasas_get_ld_map_info(instance)) {
if (MR_ValidateMapInfo(instance)) {
fusion->fast_path_io = 1;
return 0;
}
}
return 1;
}
/*
* megasas_sync_map_info - Returns FW's ld_map structure
* @instance: Adapter soft state
*
* Issues an internal command (DCMD) to get the FW's controller PD
* list structure. This information is mainly used to find out SYSTEM
* supported by the FW.
*/
int
megasas_sync_map_info(struct megasas_instance *instance)
{
int ret = 0, i;
struct megasas_cmd *cmd;
struct megasas_dcmd_frame *dcmd;
u32 size_sync_info, num_lds;
struct fusion_context *fusion;
struct MR_LD_TARGET_SYNC *ci = NULL;
struct MR_DRV_RAID_MAP_ALL *map;
struct MR_LD_RAID *raid;
struct MR_LD_TARGET_SYNC *ld_sync;
dma_addr_t ci_h = 0;
u32 size_map_info;
cmd = megasas_get_cmd(instance);
if (!cmd) {
printk(KERN_DEBUG "megasas: Failed to get cmd for sync"
"info.\n");
return -ENOMEM;
}
fusion = instance->ctrl_context;
if (!fusion) {
megasas_return_cmd(instance, cmd);
return 1;
}
map = fusion->ld_drv_map[instance->map_id & 1];
num_lds = le32_to_cpu(map->raidMap.ldCount);
dcmd = &cmd->frame->dcmd;
size_sync_info = sizeof(struct MR_LD_TARGET_SYNC) *num_lds;
memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
ci = (struct MR_LD_TARGET_SYNC *)
fusion->ld_map[(instance->map_id - 1) & 1];
memset(ci, 0, fusion->max_map_sz);
ci_h = fusion->ld_map_phys[(instance->map_id - 1) & 1];
ld_sync = (struct MR_LD_TARGET_SYNC *)ci;
for (i = 0; i < num_lds; i++, ld_sync++) {
raid = MR_LdRaidGet(i, map);
ld_sync->targetId = MR_GetLDTgtId(i, map);
ld_sync->seqNum = raid->seqNum;
}
size_map_info = fusion->current_map_sz;
dcmd->cmd = MFI_CMD_DCMD;
dcmd->cmd_status = 0xFF;
dcmd->sge_count = 1;
dcmd->flags = cpu_to_le16(MFI_FRAME_DIR_WRITE);
dcmd->timeout = 0;
dcmd->pad_0 = 0;
dcmd->data_xfer_len = cpu_to_le32(size_map_info);
dcmd->mbox.b[0] = num_lds;
dcmd->mbox.b[1] = MEGASAS_DCMD_MBOX_PEND_FLAG;
dcmd->opcode = cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO);
dcmd->sgl.sge32[0].phys_addr = cpu_to_le32(ci_h);
dcmd->sgl.sge32[0].length = cpu_to_le32(size_map_info);
instance->map_update_cmd = cmd;
instance->instancet->issue_dcmd(instance, cmd);
return ret;
}
/*
* meagasas_display_intel_branding - Display branding string
* @instance: per adapter object
*
* Return nothing.
*/
static void
megasas_display_intel_branding(struct megasas_instance *instance)
{
if (instance->pdev->subsystem_vendor != PCI_VENDOR_ID_INTEL)
return;
switch (instance->pdev->device) {
case PCI_DEVICE_ID_LSI_INVADER:
switch (instance->pdev->subsystem_device) {
case MEGARAID_INTEL_RS3DC080_SSDID:
dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
instance->host->host_no,
MEGARAID_INTEL_RS3DC080_BRANDING);
break;
case MEGARAID_INTEL_RS3DC040_SSDID:
dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
instance->host->host_no,
MEGARAID_INTEL_RS3DC040_BRANDING);
break;
case MEGARAID_INTEL_RS3SC008_SSDID:
dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
instance->host->host_no,
MEGARAID_INTEL_RS3SC008_BRANDING);
break;
case MEGARAID_INTEL_RS3MC044_SSDID:
dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
instance->host->host_no,
MEGARAID_INTEL_RS3MC044_BRANDING);
break;
default:
break;
}
break;
case PCI_DEVICE_ID_LSI_FURY:
switch (instance->pdev->subsystem_device) {
case MEGARAID_INTEL_RS3WC080_SSDID:
dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
instance->host->host_no,
MEGARAID_INTEL_RS3WC080_BRANDING);
break;
case MEGARAID_INTEL_RS3WC040_SSDID:
dev_info(&instance->pdev->dev, "scsi host %d: %s\n",
instance->host->host_no,
MEGARAID_INTEL_RS3WC040_BRANDING);
break;
default:
break;
}
break;
default:
break;
}
}
/**
* megasas_init_adapter_fusion - Initializes the FW
* @instance: Adapter soft state
*
* This is the main function for initializing firmware.
*/
u32
megasas_init_adapter_fusion(struct megasas_instance *instance)
{
struct megasas_register_set __iomem *reg_set;
struct fusion_context *fusion;
u32 max_cmd;
int i = 0, count;
fusion = instance->ctrl_context;
reg_set = instance->reg_set;
/*
* Get various operational parameters from status register
*/
instance->max_fw_cmds =
instance->instancet->read_fw_status_reg(reg_set) & 0x00FFFF;
instance->max_fw_cmds = min(instance->max_fw_cmds, (u16)1008);
/*
* Reduce the max supported cmds by 1. This is to ensure that the
* reply_q_sz (1 more than the max cmd that driver may send)
* does not exceed max cmds that the FW can support
*/
instance->max_fw_cmds = instance->max_fw_cmds-1;
/* Only internal cmds (DCMD) need to have MFI frames */
instance->max_mfi_cmds = MEGASAS_INT_CMDS;
max_cmd = instance->max_fw_cmds;
fusion->reply_q_depth = 2 * (((max_cmd + 1 + 15)/16)*16);
fusion->request_alloc_sz =
sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *max_cmd;
fusion->reply_alloc_sz = sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)
*(fusion->reply_q_depth);
fusion->io_frames_alloc_sz = MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE +
(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE *
(max_cmd + 1)); /* Extra 1 for SMID 0 */
fusion->max_sge_in_main_msg =
(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL))/16;
fusion->max_sge_in_chain =
MEGASAS_MAX_SZ_CHAIN_FRAME / sizeof(union MPI2_SGE_IO_UNION);
instance->max_num_sge = rounddown_pow_of_two(
fusion->max_sge_in_main_msg + fusion->max_sge_in_chain - 2);
/* Used for pass thru MFI frame (DCMD) */
fusion->chain_offset_mfi_pthru =
offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL)/16;
fusion->chain_offset_io_request =
(MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE -
sizeof(union MPI2_SGE_IO_UNION))/16;
count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
for (i = 0 ; i < count; i++)
fusion->last_reply_idx[i] = 0;
/*
* Allocate memory for descriptors
* Create a pool of commands
*/
if (megasas_alloc_cmds(instance))
goto fail_alloc_mfi_cmds;
if (megasas_alloc_cmds_fusion(instance))
goto fail_alloc_cmds;
if (megasas_ioc_init_fusion(instance))
goto fail_ioc_init;
megasas_display_intel_branding(instance);
if (megasas_get_ctrl_info(instance, instance->ctrl_info)) {
dev_err(&instance->pdev->dev,
"Could not get controller info. Fail from %s %d\n",
__func__, __LINE__);
goto fail_ioc_init;
}
instance->supportmax256vd =
instance->ctrl_info->adapterOperations3.supportMaxExtLDs;
/* Below is additional check to address future FW enhancement */
if (instance->ctrl_info->max_lds > 64)
instance->supportmax256vd = 1;
instance->drv_supported_vd_count = MEGASAS_MAX_LD_CHANNELS
* MEGASAS_MAX_DEV_PER_CHANNEL;
instance->drv_supported_pd_count = MEGASAS_MAX_PD_CHANNELS
* MEGASAS_MAX_DEV_PER_CHANNEL;
if (instance->supportmax256vd) {
instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES_EXT;
instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
} else {
instance->fw_supported_vd_count = MAX_LOGICAL_DRIVES;
instance->fw_supported_pd_count = MAX_PHYSICAL_DEVICES;
}
dev_info(&instance->pdev->dev, "Firmware supports %d VDs %d PDs\n"
"Driver supports %d VDs %d PDs\n",
instance->fw_supported_vd_count,
instance->fw_supported_pd_count,
instance->drv_supported_vd_count,
instance->drv_supported_pd_count);
instance->flag_ieee = 1;
fusion->fast_path_io = 0;
fusion->old_map_sz =
sizeof(struct MR_FW_RAID_MAP) + (sizeof(struct MR_LD_SPAN_MAP) *
(instance->fw_supported_vd_count - 1));
fusion->new_map_sz =
sizeof(struct MR_FW_RAID_MAP_EXT);
fusion->drv_map_sz =
sizeof(struct MR_DRV_RAID_MAP) + (sizeof(struct MR_LD_SPAN_MAP) *
(instance->drv_supported_vd_count - 1));
fusion->drv_map_pages = get_order(fusion->drv_map_sz);
for (i = 0; i < 2; i++) {
fusion->ld_map[i] = NULL;
fusion->ld_drv_map[i] = (void *)__get_free_pages(GFP_KERNEL,
fusion->drv_map_pages);
if (!fusion->ld_drv_map[i]) {
dev_err(&instance->pdev->dev, "Could not allocate "
"memory for local map info for %d pages\n",
fusion->drv_map_pages);
if (i == 1)
free_pages((ulong)fusion->ld_drv_map[0],
fusion->drv_map_pages);
goto fail_ioc_init;
}
}
fusion->max_map_sz = max(fusion->old_map_sz, fusion->new_map_sz);
if (instance->supportmax256vd)
fusion->current_map_sz = fusion->new_map_sz;
else
fusion->current_map_sz = fusion->old_map_sz;
for (i = 0; i < 2; i++) {
fusion->ld_map[i] = dma_alloc_coherent(&instance->pdev->dev,
fusion->max_map_sz,
&fusion->ld_map_phys[i],
GFP_KERNEL);
if (!fusion->ld_map[i]) {
printk(KERN_ERR "megasas: Could not allocate memory "
"for map info\n");
goto fail_map_info;
}
}
if (!megasas_get_map_info(instance))
megasas_sync_map_info(instance);
return 0;
fail_map_info:
if (i == 1)
dma_free_coherent(&instance->pdev->dev, fusion->max_map_sz,
fusion->ld_map[0], fusion->ld_map_phys[0]);
fail_ioc_init:
megasas_free_cmds_fusion(instance);
fail_alloc_cmds:
megasas_free_cmds(instance);
fail_alloc_mfi_cmds:
return 1;
}
/**
* megasas_fire_cmd_fusion - Sends command to the FW
* @frame_phys_addr : Physical address of cmd
* @frame_count : Number of frames for the command
* @regs : MFI register set
*/
void
megasas_fire_cmd_fusion(struct megasas_instance *instance,
dma_addr_t req_desc_lo,
u32 req_desc_hi,
struct megasas_register_set __iomem *regs)
{
#if defined(writeq) && defined(CONFIG_64BIT)
u64 req_data = (((u64)req_desc_hi << 32) | (u32)req_desc_lo);
writeq(le64_to_cpu(req_data), &(regs)->inbound_low_queue_port);
#else
unsigned long flags;
spin_lock_irqsave(&instance->hba_lock, flags);
writel(le32_to_cpu(req_desc_lo), &(regs)->inbound_low_queue_port);
writel(le32_to_cpu(req_desc_hi), &(regs)->inbound_high_queue_port);
spin_unlock_irqrestore(&instance->hba_lock, flags);
#endif
}
/**
* map_cmd_status - Maps FW cmd status to OS cmd status
* @cmd : Pointer to cmd
* @status : status of cmd returned by FW
* @ext_status : ext status of cmd returned by FW
*/
void
map_cmd_status(struct megasas_cmd_fusion *cmd, u8 status, u8 ext_status)
{
switch (status) {
case MFI_STAT_OK:
cmd->scmd->result = DID_OK << 16;
break;
case MFI_STAT_SCSI_IO_FAILED:
case MFI_STAT_LD_INIT_IN_PROGRESS:
cmd->scmd->result = (DID_ERROR << 16) | ext_status;
break;
case MFI_STAT_SCSI_DONE_WITH_ERROR:
cmd->scmd->result = (DID_OK << 16) | ext_status;
if (ext_status == SAM_STAT_CHECK_CONDITION) {
memset(cmd->scmd->sense_buffer, 0,
SCSI_SENSE_BUFFERSIZE);
memcpy(cmd->scmd->sense_buffer, cmd->sense,
SCSI_SENSE_BUFFERSIZE);
cmd->scmd->result |= DRIVER_SENSE << 24;
}
break;
case MFI_STAT_LD_OFFLINE:
case MFI_STAT_DEVICE_NOT_FOUND:
cmd->scmd->result = DID_BAD_TARGET << 16;
break;
case MFI_STAT_CONFIG_SEQ_MISMATCH:
cmd->scmd->result = DID_IMM_RETRY << 16;
break;
default:
printk(KERN_DEBUG "megasas: FW status %#x\n", status);
cmd->scmd->result = DID_ERROR << 16;
break;
}
}
/**
* megasas_make_sgl_fusion - Prepares 32-bit SGL
* @instance: Adapter soft state
* @scp: SCSI command from the mid-layer
* @sgl_ptr: SGL to be filled in
* @cmd: cmd we are working on
*
* If successful, this function returns the number of SG elements.
*/
static int
megasas_make_sgl_fusion(struct megasas_instance *instance,
struct scsi_cmnd *scp,
struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr,
struct megasas_cmd_fusion *cmd)
{
int i, sg_processed, sge_count;
struct scatterlist *os_sgl;
struct fusion_context *fusion;
fusion = instance->ctrl_context;
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end = sgl_ptr;
sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
sgl_ptr_end->Flags = 0;
}
sge_count = scsi_dma_map(scp);
BUG_ON(sge_count < 0);
if (sge_count > instance->max_num_sge || !sge_count)
return sge_count;
scsi_for_each_sg(scp, os_sgl, sge_count, i) {
sgl_ptr->Length = cpu_to_le32(sg_dma_len(os_sgl));
sgl_ptr->Address = cpu_to_le64(sg_dma_address(os_sgl));
sgl_ptr->Flags = 0;
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
if (i == sge_count - 1)
sgl_ptr->Flags = IEEE_SGE_FLAGS_END_OF_LIST;
}
sgl_ptr++;
sg_processed = i + 1;
if ((sg_processed == (fusion->max_sge_in_main_msg - 1)) &&
(sge_count > fusion->max_sge_in_main_msg)) {
struct MPI25_IEEE_SGE_CHAIN64 *sg_chain;
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_FURY)) {
if ((le16_to_cpu(cmd->io_request->IoFlags) &
MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH) !=
MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH)
cmd->io_request->ChainOffset =
fusion->
chain_offset_io_request;
else
cmd->io_request->ChainOffset = 0;
} else
cmd->io_request->ChainOffset =
fusion->chain_offset_io_request;
sg_chain = sgl_ptr;
/* Prepare chain element */
sg_chain->NextChainOffset = 0;
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_FURY))
sg_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT;
else
sg_chain->Flags =
(IEEE_SGE_FLAGS_CHAIN_ELEMENT |
MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR);
sg_chain->Length = cpu_to_le32((sizeof(union MPI2_SGE_IO_UNION) * (sge_count - sg_processed)));
sg_chain->Address = cpu_to_le64(cmd->sg_frame_phys_addr);
sgl_ptr =
(struct MPI25_IEEE_SGE_CHAIN64 *)cmd->sg_frame;
}
}
return sge_count;
}
/**
* megasas_set_pd_lba - Sets PD LBA
* @cdb: CDB
* @cdb_len: cdb length
* @start_blk: Start block of IO
*
* Used to set the PD LBA in CDB for FP IOs
*/
void
megasas_set_pd_lba(struct MPI2_RAID_SCSI_IO_REQUEST *io_request, u8 cdb_len,
struct IO_REQUEST_INFO *io_info, struct scsi_cmnd *scp,
struct MR_DRV_RAID_MAP_ALL *local_map_ptr, u32 ref_tag)
{
struct MR_LD_RAID *raid;
u32 ld;
u64 start_blk = io_info->pdBlock;
u8 *cdb = io_request->CDB.CDB32;
u32 num_blocks = io_info->numBlocks;
u8 opcode = 0, flagvals = 0, groupnum = 0, control = 0;
/* Check if T10 PI (DIF) is enabled for this LD */
ld = MR_TargetIdToLdGet(io_info->ldTgtId, local_map_ptr);
raid = MR_LdRaidGet(ld, local_map_ptr);
if (raid->capability.ldPiMode == MR_PROT_INFO_TYPE_CONTROLLER) {
memset(cdb, 0, sizeof(io_request->CDB.CDB32));
cdb[0] = MEGASAS_SCSI_VARIABLE_LENGTH_CMD;
cdb[7] = MEGASAS_SCSI_ADDL_CDB_LEN;
if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_READ32;
else
cdb[9] = MEGASAS_SCSI_SERVICE_ACTION_WRITE32;
cdb[10] = MEGASAS_RD_WR_PROTECT_CHECK_ALL;
/* LBA */
cdb[12] = (u8)((start_blk >> 56) & 0xff);
cdb[13] = (u8)((start_blk >> 48) & 0xff);
cdb[14] = (u8)((start_blk >> 40) & 0xff);
cdb[15] = (u8)((start_blk >> 32) & 0xff);
cdb[16] = (u8)((start_blk >> 24) & 0xff);
cdb[17] = (u8)((start_blk >> 16) & 0xff);
cdb[18] = (u8)((start_blk >> 8) & 0xff);
cdb[19] = (u8)(start_blk & 0xff);
/* Logical block reference tag */
io_request->CDB.EEDP32.PrimaryReferenceTag =
cpu_to_be32(ref_tag);
io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0xffff;
io_request->IoFlags = cpu_to_le16(32); /* Specify 32-byte cdb */
/* Transfer length */
cdb[28] = (u8)((num_blocks >> 24) & 0xff);
cdb[29] = (u8)((num_blocks >> 16) & 0xff);
cdb[30] = (u8)((num_blocks >> 8) & 0xff);
cdb[31] = (u8)(num_blocks & 0xff);
/* set SCSI IO EEDPFlags */
if (scp->sc_data_direction == PCI_DMA_FROMDEVICE) {
io_request->EEDPFlags = cpu_to_le16(
MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG |
MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP |
MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG |
MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD);
} else {
io_request->EEDPFlags = cpu_to_le16(
MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG |
MPI2_SCSIIO_EEDPFLAGS_INSERT_OP);
}
io_request->Control |= cpu_to_le32((0x4 << 26));
io_request->EEDPBlockSize = cpu_to_le32(scp->device->sector_size);
} else {
/* Some drives don't support 16/12 byte CDB's, convert to 10 */
if (((cdb_len == 12) || (cdb_len == 16)) &&
(start_blk <= 0xffffffff)) {
if (cdb_len == 16) {
opcode = cdb[0] == READ_16 ? READ_10 : WRITE_10;
flagvals = cdb[1];
groupnum = cdb[14];
control = cdb[15];
} else {
opcode = cdb[0] == READ_12 ? READ_10 : WRITE_10;
flagvals = cdb[1];
groupnum = cdb[10];
control = cdb[11];
}
memset(cdb, 0, sizeof(io_request->CDB.CDB32));
cdb[0] = opcode;
cdb[1] = flagvals;
cdb[6] = groupnum;
cdb[9] = control;
/* Transfer length */
cdb[8] = (u8)(num_blocks & 0xff);
cdb[7] = (u8)((num_blocks >> 8) & 0xff);
io_request->IoFlags = cpu_to_le16(10); /* Specify 10-byte cdb */
cdb_len = 10;
} else if ((cdb_len < 16) && (start_blk > 0xffffffff)) {
/* Convert to 16 byte CDB for large LBA's */
switch (cdb_len) {
case 6:
opcode = cdb[0] == READ_6 ? READ_16 : WRITE_16;
control = cdb[5];
break;
case 10:
opcode =
cdb[0] == READ_10 ? READ_16 : WRITE_16;
flagvals = cdb[1];
groupnum = cdb[6];
control = cdb[9];
break;
case 12:
opcode =
cdb[0] == READ_12 ? READ_16 : WRITE_16;
flagvals = cdb[1];
groupnum = cdb[10];
control = cdb[11];
break;
}
memset(cdb, 0, sizeof(io_request->CDB.CDB32));
cdb[0] = opcode;
cdb[1] = flagvals;
cdb[14] = groupnum;
cdb[15] = control;
/* Transfer length */
cdb[13] = (u8)(num_blocks & 0xff);
cdb[12] = (u8)((num_blocks >> 8) & 0xff);
cdb[11] = (u8)((num_blocks >> 16) & 0xff);
cdb[10] = (u8)((num_blocks >> 24) & 0xff);
io_request->IoFlags = cpu_to_le16(16); /* Specify 16-byte cdb */
cdb_len = 16;
}
/* Normal case, just load LBA here */
switch (cdb_len) {
case 6:
{
u8 val = cdb[1] & 0xE0;
cdb[3] = (u8)(start_blk & 0xff);
cdb[2] = (u8)((start_blk >> 8) & 0xff);
cdb[1] = val | ((u8)(start_blk >> 16) & 0x1f);
break;
}
case 10:
cdb[5] = (u8)(start_blk & 0xff);
cdb[4] = (u8)((start_blk >> 8) & 0xff);
cdb[3] = (u8)((start_blk >> 16) & 0xff);
cdb[2] = (u8)((start_blk >> 24) & 0xff);
break;
case 12:
cdb[5] = (u8)(start_blk & 0xff);
cdb[4] = (u8)((start_blk >> 8) & 0xff);
cdb[3] = (u8)((start_blk >> 16) & 0xff);
cdb[2] = (u8)((start_blk >> 24) & 0xff);
break;
case 16:
cdb[9] = (u8)(start_blk & 0xff);
cdb[8] = (u8)((start_blk >> 8) & 0xff);
cdb[7] = (u8)((start_blk >> 16) & 0xff);
cdb[6] = (u8)((start_blk >> 24) & 0xff);
cdb[5] = (u8)((start_blk >> 32) & 0xff);
cdb[4] = (u8)((start_blk >> 40) & 0xff);
cdb[3] = (u8)((start_blk >> 48) & 0xff);
cdb[2] = (u8)((start_blk >> 56) & 0xff);
break;
}
}
}
/**
* megasas_build_ldio_fusion - Prepares IOs to devices
* @instance: Adapter soft state
* @scp: SCSI command
* @cmd: Command to be prepared
*
* Prepares the io_request and chain elements (sg_frame) for IO
* The IO can be for PD (Fast Path) or LD
*/
void
megasas_build_ldio_fusion(struct megasas_instance *instance,
struct scsi_cmnd *scp,
struct megasas_cmd_fusion *cmd)
{
u8 fp_possible;
u32 start_lba_lo, start_lba_hi, device_id, datalength = 0;
struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
struct IO_REQUEST_INFO io_info;
struct fusion_context *fusion;
struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
u8 *raidLUN;
device_id = MEGASAS_DEV_INDEX(instance, scp);
fusion = instance->ctrl_context;
io_request = cmd->io_request;
io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
io_request->RaidContext.status = 0;
io_request->RaidContext.exStatus = 0;
req_desc = (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)cmd->request_desc;
start_lba_lo = 0;
start_lba_hi = 0;
fp_possible = 0;
/*
* 6-byte READ(0x08) or WRITE(0x0A) cdb
*/
if (scp->cmd_len == 6) {
datalength = (u32) scp->cmnd[4];
start_lba_lo = ((u32) scp->cmnd[1] << 16) |
((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
start_lba_lo &= 0x1FFFFF;
}
/*
* 10-byte READ(0x28) or WRITE(0x2A) cdb
*/
else if (scp->cmd_len == 10) {
datalength = (u32) scp->cmnd[8] |
((u32) scp->cmnd[7] << 8);
start_lba_lo = ((u32) scp->cmnd[2] << 24) |
((u32) scp->cmnd[3] << 16) |
((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
}
/*
* 12-byte READ(0xA8) or WRITE(0xAA) cdb
*/
else if (scp->cmd_len == 12) {
datalength = ((u32) scp->cmnd[6] << 24) |
((u32) scp->cmnd[7] << 16) |
((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
start_lba_lo = ((u32) scp->cmnd[2] << 24) |
((u32) scp->cmnd[3] << 16) |
((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
}
/*
* 16-byte READ(0x88) or WRITE(0x8A) cdb
*/
else if (scp->cmd_len == 16) {
datalength = ((u32) scp->cmnd[10] << 24) |
((u32) scp->cmnd[11] << 16) |
((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
start_lba_lo = ((u32) scp->cmnd[6] << 24) |
((u32) scp->cmnd[7] << 16) |
((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
start_lba_hi = ((u32) scp->cmnd[2] << 24) |
((u32) scp->cmnd[3] << 16) |
((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
}
memset(&io_info, 0, sizeof(struct IO_REQUEST_INFO));
io_info.ldStartBlock = ((u64)start_lba_hi << 32) | start_lba_lo;
io_info.numBlocks = datalength;
io_info.ldTgtId = device_id;
io_request->DataLength = cpu_to_le32(scsi_bufflen(scp));
if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
io_info.isRead = 1;
local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
if ((MR_TargetIdToLdGet(device_id, local_map_ptr) >=
instance->fw_supported_vd_count) || (!fusion->fast_path_io)) {
io_request->RaidContext.regLockFlags = 0;
fp_possible = 0;
} else {
if (MR_BuildRaidContext(instance, &io_info,
&io_request->RaidContext,
local_map_ptr, &raidLUN))
fp_possible = io_info.fpOkForIo;
}
/* Use smp_processor_id() for now until cmd->request->cpu is CPU
id by default, not CPU group id, otherwise all MSI-X queues won't
be utilized */
cmd->request_desc->SCSIIO.MSIxIndex = instance->msix_vectors ?
smp_processor_id() % instance->msix_vectors : 0;
if (fp_possible) {
megasas_set_pd_lba(io_request, scp->cmd_len, &io_info, scp,
local_map_ptr, start_lba_lo);
io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
cmd->request_desc->SCSIIO.RequestFlags =
(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY
<< MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
if (io_request->RaidContext.regLockFlags ==
REGION_TYPE_UNUSED)
cmd->request_desc->SCSIIO.RequestFlags =
(MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
io_request->RaidContext.Type = MPI2_TYPE_CUDA;
io_request->RaidContext.nseg = 0x1;
io_request->IoFlags |= cpu_to_le16(MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
io_request->RaidContext.regLockFlags |=
(MR_RL_FLAGS_GRANT_DESTINATION_CUDA |
MR_RL_FLAGS_SEQ_NUM_ENABLE);
}
if ((fusion->load_balance_info[device_id].loadBalanceFlag) &&
(io_info.isRead)) {
io_info.devHandle =
get_updated_dev_handle(instance,
&fusion->load_balance_info[device_id],
&io_info);
scp->SCp.Status |= MEGASAS_LOAD_BALANCE_FLAG;
cmd->pd_r1_lb = io_info.pd_after_lb;
} else
scp->SCp.Status &= ~MEGASAS_LOAD_BALANCE_FLAG;
cmd->request_desc->SCSIIO.DevHandle = io_info.devHandle;
io_request->DevHandle = io_info.devHandle;
/* populate the LUN field */
memcpy(io_request->LUN, raidLUN, 8);
} else {
io_request->RaidContext.timeoutValue =
cpu_to_le16(local_map_ptr->raidMap.fpPdIoTimeoutSec);
cmd->request_desc->SCSIIO.RequestFlags =
(MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO
<< MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
if (io_request->RaidContext.regLockFlags ==
REGION_TYPE_UNUSED)
cmd->request_desc->SCSIIO.RequestFlags =
(MEGASAS_REQ_DESCRIPT_FLAGS_NO_LOCK <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
io_request->RaidContext.Type = MPI2_TYPE_CUDA;
io_request->RaidContext.regLockFlags |=
(MR_RL_FLAGS_GRANT_DESTINATION_CPU0 |
MR_RL_FLAGS_SEQ_NUM_ENABLE);
io_request->RaidContext.nseg = 0x1;
}
io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
io_request->DevHandle = cpu_to_le16(device_id);
} /* Not FP */
}
/**
* megasas_build_dcdb_fusion - Prepares IOs to devices
* @instance: Adapter soft state
* @scp: SCSI command
* @cmd: Command to be prepared
*
* Prepares the io_request frame for non-io cmds
*/
static void
megasas_build_dcdb_fusion(struct megasas_instance *instance,
struct scsi_cmnd *scmd,
struct megasas_cmd_fusion *cmd)
{
u32 device_id;
struct MPI2_RAID_SCSI_IO_REQUEST *io_request;
u16 pd_index = 0;
struct MR_DRV_RAID_MAP_ALL *local_map_ptr;
struct fusion_context *fusion = instance->ctrl_context;
u8 span, physArm;
u16 devHandle;
u32 ld, arRef, pd;
struct MR_LD_RAID *raid;
struct RAID_CONTEXT *pRAID_Context;
io_request = cmd->io_request;
device_id = MEGASAS_DEV_INDEX(instance, scmd);
pd_index = (scmd->device->channel * MEGASAS_MAX_DEV_PER_CHANNEL)
+scmd->device->id;
local_map_ptr = fusion->ld_drv_map[(instance->map_id & 1)];
io_request->DataLength = cpu_to_le32(scsi_bufflen(scmd));
/* Check if this is a system PD I/O */
if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS &&
instance->pd_list[pd_index].driveState == MR_PD_STATE_SYSTEM) {
io_request->Function = 0;
if (fusion->fast_path_io)
io_request->DevHandle =
local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
io_request->RaidContext.timeoutValue =
local_map_ptr->raidMap.fpPdIoTimeoutSec;
io_request->RaidContext.regLockFlags = 0;
io_request->RaidContext.regLockRowLBA = 0;
io_request->RaidContext.regLockLength = 0;
io_request->RaidContext.RAIDFlags =
MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD <<
MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT;
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
io_request->IoFlags |= cpu_to_le16(
MPI25_SAS_DEVICE0_FLAGS_ENABLED_FAST_PATH);
cmd->request_desc->SCSIIO.RequestFlags =
(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
cmd->request_desc->SCSIIO.DevHandle =
local_map_ptr->raidMap.devHndlInfo[device_id].curDevHdl;
cmd->request_desc->SCSIIO.MSIxIndex =
instance->msix_vectors ? smp_processor_id() % instance->msix_vectors : 0;
/*
* If the command is for the tape device, set the
* FP timeout to the os layer timeout value.
*/
if (scmd->device->type == TYPE_TAPE) {
if ((scmd->request->timeout / HZ) > 0xFFFF)
io_request->RaidContext.timeoutValue =
0xFFFF;
else
io_request->RaidContext.timeoutValue =
scmd->request->timeout / HZ;
}
} else {
if (scmd->device->channel < MEGASAS_MAX_PD_CHANNELS)
goto NonFastPath;
ld = MR_TargetIdToLdGet(device_id, local_map_ptr);
if ((ld >= instance->fw_supported_vd_count) ||
(!fusion->fast_path_io))
goto NonFastPath;
raid = MR_LdRaidGet(ld, local_map_ptr);
/* check if this LD is FP capable */
if (!(raid->capability.fpNonRWCapable))
/* not FP capable, send as non-FP */
goto NonFastPath;
/* get RAID_Context pointer */
pRAID_Context = &io_request->RaidContext;
/* set RAID context values */
pRAID_Context->regLockFlags = REGION_TYPE_SHARED_READ;
pRAID_Context->timeoutValue = raid->fpIoTimeoutForLd;
pRAID_Context->VirtualDiskTgtId = cpu_to_le16(device_id);
pRAID_Context->regLockRowLBA = 0;
pRAID_Context->regLockLength = 0;
pRAID_Context->configSeqNum = raid->seqNum;
/* get the DevHandle for the PD (since this is
fpNonRWCapable, this is a single disk RAID0) */
span = physArm = 0;
arRef = MR_LdSpanArrayGet(ld, span, local_map_ptr);
pd = MR_ArPdGet(arRef, physArm, local_map_ptr);
devHandle = MR_PdDevHandleGet(pd, local_map_ptr);
/* build request descriptor */
cmd->request_desc->SCSIIO.RequestFlags =
(MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
cmd->request_desc->SCSIIO.DevHandle = devHandle;
/* populate the LUN field */
memcpy(io_request->LUN, raid->LUN, 8);
/* build the raidScsiIO structure */
io_request->Function = MPI2_FUNCTION_SCSI_IO_REQUEST;
io_request->DevHandle = devHandle;
return;
NonFastPath:
io_request->Function = MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST;
io_request->DevHandle = cpu_to_le16(device_id);
cmd->request_desc->SCSIIO.RequestFlags =
(MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
}
io_request->RaidContext.VirtualDiskTgtId = cpu_to_le16(device_id);
int_to_scsilun(scmd->device->lun, (struct scsi_lun *)io_request->LUN);
}
/**
* megasas_build_io_fusion - Prepares IOs to devices
* @instance: Adapter soft state
* @scp: SCSI command
* @cmd: Command to be prepared
*
* Invokes helper functions to prepare request frames
* and sets flags appropriate for IO/Non-IO cmd
*/
int
megasas_build_io_fusion(struct megasas_instance *instance,
struct scsi_cmnd *scp,
struct megasas_cmd_fusion *cmd)
{
u32 device_id, sge_count;
struct MPI2_RAID_SCSI_IO_REQUEST *io_request = cmd->io_request;
device_id = MEGASAS_DEV_INDEX(instance, scp);
/* Zero out some fields so they don't get reused */
memset(io_request->LUN, 0x0, 8);
io_request->CDB.EEDP32.PrimaryReferenceTag = 0;
io_request->CDB.EEDP32.PrimaryApplicationTagMask = 0;
io_request->EEDPFlags = 0;
io_request->Control = 0;
io_request->EEDPBlockSize = 0;
io_request->ChainOffset = 0;
io_request->RaidContext.RAIDFlags = 0;
io_request->RaidContext.Type = 0;
io_request->RaidContext.nseg = 0;
memcpy(io_request->CDB.CDB32, scp->cmnd, scp->cmd_len);
/*
* Just the CDB length,rest of the Flags are zero
* This will be modified for FP in build_ldio_fusion
*/
io_request->IoFlags = cpu_to_le16(scp->cmd_len);
if (megasas_is_ldio(scp))
megasas_build_ldio_fusion(instance, scp, cmd);
else
megasas_build_dcdb_fusion(instance, scp, cmd);
/*
* Construct SGL
*/
sge_count =
megasas_make_sgl_fusion(instance, scp,
(struct MPI25_IEEE_SGE_CHAIN64 *)
&io_request->SGL, cmd);
if (sge_count > instance->max_num_sge) {
printk(KERN_ERR "megasas: Error. sge_count (0x%x) exceeds "
"max (0x%x) allowed\n", sge_count,
instance->max_num_sge);
return 1;
}
io_request->RaidContext.numSGE = sge_count;
io_request->SGLFlags = cpu_to_le16(MPI2_SGE_FLAGS_64_BIT_ADDRESSING);
if (scp->sc_data_direction == PCI_DMA_TODEVICE)
io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_WRITE);
else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
io_request->Control |= cpu_to_le32(MPI2_SCSIIO_CONTROL_READ);
io_request->SGLOffset0 =
offsetof(struct MPI2_RAID_SCSI_IO_REQUEST, SGL) / 4;
io_request->SenseBufferLowAddress = cpu_to_le32(cmd->sense_phys_addr);
io_request->SenseBufferLength = SCSI_SENSE_BUFFERSIZE;
cmd->scmd = scp;
scp->SCp.ptr = (char *)cmd;
return 0;
}
union MEGASAS_REQUEST_DESCRIPTOR_UNION *
megasas_get_request_descriptor(struct megasas_instance *instance, u16 index)
{
u8 *p;
struct fusion_context *fusion;
if (index >= instance->max_fw_cmds) {
printk(KERN_ERR "megasas: Invalid SMID (0x%x)request for "
"descriptor for scsi%d\n", index,
instance->host->host_no);
return NULL;
}
fusion = instance->ctrl_context;
p = fusion->req_frames_desc
+sizeof(union MEGASAS_REQUEST_DESCRIPTOR_UNION) *index;
return (union MEGASAS_REQUEST_DESCRIPTOR_UNION *)p;
}
/**
* megasas_build_and_issue_cmd_fusion -Main routine for building and
* issuing non IOCTL cmd
* @instance: Adapter soft state
* @scmd: pointer to scsi cmd from OS
*/
static u32
megasas_build_and_issue_cmd_fusion(struct megasas_instance *instance,
struct scsi_cmnd *scmd)
{
struct megasas_cmd_fusion *cmd;
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
u32 index;
struct fusion_context *fusion;
fusion = instance->ctrl_context;
cmd = megasas_get_cmd_fusion(instance);
if (!cmd)
return SCSI_MLQUEUE_HOST_BUSY;
index = cmd->index;
req_desc = megasas_get_request_descriptor(instance, index-1);
if (!req_desc)
return 1;
req_desc->Words = 0;
cmd->request_desc = req_desc;
if (megasas_build_io_fusion(instance, scmd, cmd)) {
megasas_return_cmd_fusion(instance, cmd);
printk(KERN_ERR "megasas: Error building command.\n");
cmd->request_desc = NULL;
return 1;
}
req_desc = cmd->request_desc;
req_desc->SCSIIO.SMID = cpu_to_le16(index);
if (cmd->io_request->ChainOffset != 0 &&
cmd->io_request->ChainOffset != 0xF)
printk(KERN_ERR "megasas: The chain offset value is not "
"correct : %x\n", cmd->io_request->ChainOffset);
/*
* Issue the command to the FW
*/
atomic_inc(&instance->fw_outstanding);
instance->instancet->fire_cmd(instance,
req_desc->u.low, req_desc->u.high,
instance->reg_set);
return 0;
}
/**
* complete_cmd_fusion - Completes command
* @instance: Adapter soft state
* Completes all commands that is in reply descriptor queue
*/
int
complete_cmd_fusion(struct megasas_instance *instance, u32 MSIxIndex)
{
union MPI2_REPLY_DESCRIPTORS_UNION *desc;
struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *reply_desc;
struct MPI2_RAID_SCSI_IO_REQUEST *scsi_io_req;
struct fusion_context *fusion;
struct megasas_cmd *cmd_mfi;
struct megasas_cmd_fusion *cmd_fusion;
u16 smid, num_completed;
u8 reply_descript_type;
u32 status, extStatus, device_id;
union desc_value d_val;
struct LD_LOAD_BALANCE_INFO *lbinfo;
int threshold_reply_count = 0;
fusion = instance->ctrl_context;
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR)
return IRQ_HANDLED;
desc = fusion->reply_frames_desc;
desc += ((MSIxIndex * fusion->reply_alloc_sz)/
sizeof(union MPI2_REPLY_DESCRIPTORS_UNION)) +
fusion->last_reply_idx[MSIxIndex];
reply_desc = (struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
d_val.word = desc->Words;
reply_descript_type = reply_desc->ReplyFlags &
MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
return IRQ_NONE;
num_completed = 0;
while ((d_val.u.low != UINT_MAX) && (d_val.u.high != UINT_MAX)) {
smid = le16_to_cpu(reply_desc->SMID);
cmd_fusion = fusion->cmd_list[smid - 1];
scsi_io_req =
(struct MPI2_RAID_SCSI_IO_REQUEST *)
cmd_fusion->io_request;
if (cmd_fusion->scmd)
cmd_fusion->scmd->SCp.ptr = NULL;
status = scsi_io_req->RaidContext.status;
extStatus = scsi_io_req->RaidContext.exStatus;
switch (scsi_io_req->Function) {
case MPI2_FUNCTION_SCSI_IO_REQUEST: /*Fast Path IO.*/
/* Update load balancing info */
device_id = MEGASAS_DEV_INDEX(instance,
cmd_fusion->scmd);
lbinfo = &fusion->load_balance_info[device_id];
if (cmd_fusion->scmd->SCp.Status &
MEGASAS_LOAD_BALANCE_FLAG) {
atomic_dec(&lbinfo->scsi_pending_cmds[cmd_fusion->pd_r1_lb]);
cmd_fusion->scmd->SCp.Status &=
~MEGASAS_LOAD_BALANCE_FLAG;
}
if (reply_descript_type ==
MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS) {
if (megasas_dbg_lvl == 5)
printk(KERN_ERR "\nmegasas: FAST Path "
"IO Success\n");
}
/* Fall thru and complete IO */
case MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST: /* LD-IO Path */
/* Map the FW Cmd Status */
map_cmd_status(cmd_fusion, status, extStatus);
scsi_dma_unmap(cmd_fusion->scmd);
cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
scsi_io_req->RaidContext.status = 0;
scsi_io_req->RaidContext.exStatus = 0;
megasas_return_cmd_fusion(instance, cmd_fusion);
atomic_dec(&instance->fw_outstanding);
break;
case MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST: /*MFI command */
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);
cmd_fusion->flags = 0;
break;
}
fusion->last_reply_idx[MSIxIndex]++;
if (fusion->last_reply_idx[MSIxIndex] >=
fusion->reply_q_depth)
fusion->last_reply_idx[MSIxIndex] = 0;
desc->Words = ULLONG_MAX;
num_completed++;
threshold_reply_count++;
/* Get the next reply descriptor */
if (!fusion->last_reply_idx[MSIxIndex])
desc = fusion->reply_frames_desc +
((MSIxIndex * fusion->reply_alloc_sz)/
sizeof(union MPI2_REPLY_DESCRIPTORS_UNION));
else
desc++;
reply_desc =
(struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR *)desc;
d_val.word = desc->Words;
reply_descript_type = reply_desc->ReplyFlags &
MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK;
if (reply_descript_type == MPI2_RPY_DESCRIPT_FLAGS_UNUSED)
break;
/*
* Write to reply post host index register after completing threshold
* number of reply counts and still there are more replies in reply queue
* pending to be completed
*/
if (threshold_reply_count >= THRESHOLD_REPLY_COUNT) {
if ((instance->pdev->device ==
PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device ==
PCI_DEVICE_ID_LSI_FURY))
writel(((MSIxIndex & 0x7) << 24) |
fusion->last_reply_idx[MSIxIndex],
instance->reply_post_host_index_addr[MSIxIndex/8]);
else
writel((MSIxIndex << 24) |
fusion->last_reply_idx[MSIxIndex],
instance->reply_post_host_index_addr[0]);
threshold_reply_count = 0;
}
}
if (!num_completed)
return IRQ_NONE;
wmb();
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY))
writel(((MSIxIndex & 0x7) << 24) |
fusion->last_reply_idx[MSIxIndex],
instance->reply_post_host_index_addr[MSIxIndex/8]);
else
writel((MSIxIndex << 24) |
fusion->last_reply_idx[MSIxIndex],
instance->reply_post_host_index_addr[0]);
megasas_check_and_restore_queue_depth(instance);
return IRQ_HANDLED;
}
/**
* megasas_complete_cmd_dpc_fusion - Completes command
* @instance: Adapter soft state
*
* Tasklet to complete cmds
*/
void
megasas_complete_cmd_dpc_fusion(unsigned long instance_addr)
{
struct megasas_instance *instance =
(struct megasas_instance *)instance_addr;
unsigned long flags;
u32 count, MSIxIndex;
count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
/* If we have already declared adapter dead, donot complete cmds */
spin_lock_irqsave(&instance->hba_lock, flags);
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
spin_unlock_irqrestore(&instance->hba_lock, flags);
return;
}
spin_unlock_irqrestore(&instance->hba_lock, flags);
for (MSIxIndex = 0 ; MSIxIndex < count; MSIxIndex++)
complete_cmd_fusion(instance, MSIxIndex);
}
/**
* megasas_isr_fusion - isr entry point
*/
irqreturn_t megasas_isr_fusion(int irq, void *devp)
{
struct megasas_irq_context *irq_context = devp;
struct megasas_instance *instance = irq_context->instance;
u32 mfiStatus, fw_state, dma_state;
if (instance->mask_interrupts)
return IRQ_NONE;
if (!instance->msix_vectors) {
mfiStatus = instance->instancet->clear_intr(instance->reg_set);
if (!mfiStatus)
return IRQ_NONE;
}
/* If we are resetting, bail */
if (test_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags)) {
instance->instancet->clear_intr(instance->reg_set);
return IRQ_HANDLED;
}
if (!complete_cmd_fusion(instance, irq_context->MSIxIndex)) {
instance->instancet->clear_intr(instance->reg_set);
/* If we didn't complete any commands, check for FW fault */
fw_state = instance->instancet->read_fw_status_reg(
instance->reg_set) & MFI_STATE_MASK;
dma_state = instance->instancet->read_fw_status_reg
(instance->reg_set) & MFI_STATE_DMADONE;
if (instance->crash_dump_drv_support &&
instance->crash_dump_app_support) {
/* Start collecting crash, if DMA bit is done */
if ((fw_state == MFI_STATE_FAULT) && dma_state)
schedule_work(&instance->crash_init);
else if (fw_state == MFI_STATE_FAULT)
schedule_work(&instance->work_init);
} else if (fw_state == MFI_STATE_FAULT) {
printk(KERN_WARNING "megaraid_sas: Iop2SysDoorbellInt"
"for scsi%d\n", instance->host->host_no);
schedule_work(&instance->work_init);
}
}
return IRQ_HANDLED;
}
/**
* build_mpt_mfi_pass_thru - builds a cmd fo MFI Pass thru
* @instance: Adapter soft state
* mfi_cmd: megasas_cmd pointer
*
*/
u8
build_mpt_mfi_pass_thru(struct megasas_instance *instance,
struct megasas_cmd *mfi_cmd)
{
struct MPI25_IEEE_SGE_CHAIN64 *mpi25_ieee_chain;
struct MPI2_RAID_SCSI_IO_REQUEST *io_req;
struct megasas_cmd_fusion *cmd;
struct fusion_context *fusion;
struct megasas_header *frame_hdr = &mfi_cmd->frame->hdr;
u32 opcode;
cmd = megasas_get_cmd_fusion(instance);
if (!cmd)
return 1;
/* Save the smid. To be used for returning the cmd */
mfi_cmd->context.smid = 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
* on completion. For cmds with this flag, don't call
* megasas_complete_cmd
*/
if (frame_hdr->flags & MFI_FRAME_DONT_POST_IN_REPLY_QUEUE)
cmd->flags = MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
fusion = instance->ctrl_context;
io_req = cmd->io_request;
if ((instance->pdev->device == PCI_DEVICE_ID_LSI_INVADER) ||
(instance->pdev->device == PCI_DEVICE_ID_LSI_FURY)) {
struct MPI25_IEEE_SGE_CHAIN64 *sgl_ptr_end =
(struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL;
sgl_ptr_end += fusion->max_sge_in_main_msg - 1;
sgl_ptr_end->Flags = 0;
}
mpi25_ieee_chain =
(struct MPI25_IEEE_SGE_CHAIN64 *)&io_req->SGL.IeeeChain;
io_req->Function = MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST;
io_req->SGLOffset0 = offsetof(struct MPI2_RAID_SCSI_IO_REQUEST,
SGL) / 4;
io_req->ChainOffset = fusion->chain_offset_mfi_pthru;
mpi25_ieee_chain->Address = cpu_to_le64(mfi_cmd->frame_phys_addr);
mpi25_ieee_chain->Flags = IEEE_SGE_FLAGS_CHAIN_ELEMENT |
MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR;
mpi25_ieee_chain->Length = cpu_to_le32(MEGASAS_MAX_SZ_CHAIN_FRAME);
return 0;
}
/**
* build_mpt_cmd - Calls helper function to build a cmd MFI Pass thru cmd
* @instance: Adapter soft state
* @cmd: mfi cmd to build
*
*/
union MEGASAS_REQUEST_DESCRIPTOR_UNION *
build_mpt_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
{
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
u16 index;
if (build_mpt_mfi_pass_thru(instance, cmd)) {
printk(KERN_ERR "Couldn't build MFI pass thru cmd\n");
return NULL;
}
index = cmd->context.smid;
req_desc = megasas_get_request_descriptor(instance, index - 1);
if (!req_desc)
return NULL;
req_desc->Words = 0;
req_desc->SCSIIO.RequestFlags = (MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO <<
MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT);
req_desc->SCSIIO.SMID = cpu_to_le16(index);
return req_desc;
}
/**
* megasas_issue_dcmd_fusion - Issues a MFI Pass thru cmd
* @instance: Adapter soft state
* @cmd: mfi cmd pointer
*
*/
void
megasas_issue_dcmd_fusion(struct megasas_instance *instance,
struct megasas_cmd *cmd)
{
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
req_desc = build_mpt_cmd(instance, cmd);
if (!req_desc) {
printk(KERN_ERR "Couldn't issue MFI pass thru cmd\n");
return;
}
atomic_set(&cmd->mfi_mpt_pthr, MFI_MPT_ATTACHED);
instance->instancet->fire_cmd(instance, req_desc->u.low,
req_desc->u.high, instance->reg_set);
}
/**
* megasas_release_fusion - Reverses the FW initialization
* @intance: Adapter soft state
*/
void
megasas_release_fusion(struct megasas_instance *instance)
{
megasas_free_cmds(instance);
megasas_free_cmds_fusion(instance);
iounmap(instance->reg_set);
pci_release_selected_regions(instance->pdev, instance->bar);
}
/**
* megasas_read_fw_status_reg_fusion - returns the current FW status value
* @regs: MFI register set
*/
static u32
megasas_read_fw_status_reg_fusion(struct megasas_register_set __iomem *regs)
{
return readl(&(regs)->outbound_scratch_pad);
}
/**
* megasas_alloc_host_crash_buffer - Host buffers for Crash dump collection from Firmware
* @instance: Controller's soft instance
* return: Number of allocated host crash buffers
*/
static void
megasas_alloc_host_crash_buffer(struct megasas_instance *instance)
{
unsigned int i;
instance->crash_buf_pages = get_order(CRASH_DMA_BUF_SIZE);
for (i = 0; i < MAX_CRASH_DUMP_SIZE; i++) {
instance->crash_buf[i] = (void *)__get_free_pages(GFP_KERNEL,
instance->crash_buf_pages);
if (!instance->crash_buf[i]) {
dev_info(&instance->pdev->dev, "Firmware crash dump "
"memory allocation failed at index %d\n", i);
break;
}
}
instance->drv_buf_alloc = i;
}
/**
* megasas_free_host_crash_buffer - Host buffers for Crash dump collection from Firmware
* @instance: Controller's soft instance
*/
void
megasas_free_host_crash_buffer(struct megasas_instance *instance)
{
unsigned int i
;
for (i = 0; i < instance->drv_buf_alloc; i++) {
if (instance->crash_buf[i])
free_pages((ulong)instance->crash_buf[i],
instance->crash_buf_pages);
}
instance->drv_buf_index = 0;
instance->drv_buf_alloc = 0;
instance->fw_crash_state = UNAVAILABLE;
instance->fw_crash_buffer_size = 0;
}
/**
* megasas_adp_reset_fusion - For controller reset
* @regs: MFI register set
*/
static int
megasas_adp_reset_fusion(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
return 0;
}
/**
* megasas_check_reset_fusion - For controller reset check
* @regs: MFI register set
*/
static int
megasas_check_reset_fusion(struct megasas_instance *instance,
struct megasas_register_set __iomem *regs)
{
return 0;
}
/* This function waits for outstanding commands on fusion to complete */
int megasas_wait_for_outstanding_fusion(struct megasas_instance *instance,
int iotimeout, int *convert)
{
int i, outstanding, retval = 0, hb_seconds_missed = 0;
u32 fw_state;
for (i = 0; i < resetwaittime; i++) {
/* Check if firmware is in fault state */
fw_state = instance->instancet->read_fw_status_reg(
instance->reg_set) & MFI_STATE_MASK;
if (fw_state == MFI_STATE_FAULT) {
printk(KERN_WARNING "megasas: Found FW in FAULT state,"
" will reset adapter scsi%d.\n",
instance->host->host_no);
retval = 1;
goto out;
}
/* If SR-IOV VF mode & heartbeat timeout, don't wait */
if (instance->requestorId && !iotimeout) {
retval = 1;
goto out;
}
/* If SR-IOV VF mode & I/O timeout, check for HB timeout */
if (instance->requestorId && iotimeout) {
if (instance->hb_host_mem->HB.fwCounter !=
instance->hb_host_mem->HB.driverCounter) {
instance->hb_host_mem->HB.driverCounter =
instance->hb_host_mem->HB.fwCounter;
hb_seconds_missed = 0;
} else {
hb_seconds_missed++;
if (hb_seconds_missed ==
(MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF/HZ)) {
printk(KERN_WARNING "megasas: SR-IOV:"
" Heartbeat never completed "
" while polling during I/O "
" timeout handling for "
"scsi%d.\n",
instance->host->host_no);
*convert = 1;
retval = 1;
goto out;
}
}
}
outstanding = atomic_read(&instance->fw_outstanding);
if (!outstanding)
goto out;
if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
"commands to complete for scsi%d\n", i,
outstanding, instance->host->host_no);
megasas_complete_cmd_dpc_fusion(
(unsigned long)instance);
}
msleep(1000);
}
if (atomic_read(&instance->fw_outstanding)) {
printk("megaraid_sas: pending commands remain after waiting, "
"will reset adapter scsi%d.\n",
instance->host->host_no);
retval = 1;
}
out:
return retval;
}
void megasas_reset_reply_desc(struct megasas_instance *instance)
{
int i, count;
struct fusion_context *fusion;
union MPI2_REPLY_DESCRIPTORS_UNION *reply_desc;
fusion = instance->ctrl_context;
count = instance->msix_vectors > 0 ? instance->msix_vectors : 1;
for (i = 0 ; i < count ; i++)
fusion->last_reply_idx[i] = 0;
reply_desc = fusion->reply_frames_desc;
for (i = 0 ; i < fusion->reply_q_depth * count; i++, reply_desc++)
reply_desc->Words = ULLONG_MAX;
}
/* Check for a second path that is currently UP */
int megasas_check_mpio_paths(struct megasas_instance *instance,
struct scsi_cmnd *scmd)
{
int i, j, retval = (DID_RESET << 16);
if (instance->mpio && instance->requestorId) {
for (i = 0 ; i < MAX_MGMT_ADAPTERS ; i++)
for (j = 0 ; j < MAX_LOGICAL_DRIVES; j++)
if (megasas_mgmt_info.instance[i] &&
(megasas_mgmt_info.instance[i] != instance) &&
megasas_mgmt_info.instance[i]->mpio &&
megasas_mgmt_info.instance[i]->requestorId
&&
(megasas_mgmt_info.instance[i]->ld_ids[j]
== scmd->device->id)) {
retval = (DID_NO_CONNECT << 16);
goto out;
}
}
out:
return retval;
}
/* Core fusion reset function */
int megasas_reset_fusion(struct Scsi_Host *shost, int iotimeout)
{
int retval = SUCCESS, i, j, retry = 0, convert = 0;
struct megasas_instance *instance;
struct megasas_cmd_fusion *cmd_fusion;
struct fusion_context *fusion;
struct megasas_cmd *cmd_mfi;
union MEGASAS_REQUEST_DESCRIPTOR_UNION *req_desc;
u32 host_diag, abs_state, status_reg, reset_adapter;
u32 io_timeout_in_crash_mode = 0;
instance = (struct megasas_instance *)shost->hostdata;
fusion = instance->ctrl_context;
mutex_lock(&instance->reset_mutex);
if (instance->adprecovery == MEGASAS_HW_CRITICAL_ERROR) {
printk(KERN_WARNING "megaraid_sas: Hardware critical error, "
"returning FAILED for scsi%d.\n",
instance->host->host_no);
mutex_unlock(&instance->reset_mutex);
return FAILED;
}
status_reg = instance->instancet->read_fw_status_reg(instance->reg_set);
abs_state = status_reg & MFI_STATE_MASK;
/* IO timeout detected, forcibly put FW in FAULT state */
if (abs_state != MFI_STATE_FAULT && instance->crash_dump_buf &&
instance->crash_dump_app_support && iotimeout) {
dev_info(&instance->pdev->dev, "IO timeout is detected, "
"forcibly FAULT Firmware\n");
instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
status_reg = readl(&instance->reg_set->doorbell);
writel(status_reg | MFI_STATE_FORCE_OCR,
&instance->reg_set->doorbell);
readl(&instance->reg_set->doorbell);
mutex_unlock(&instance->reset_mutex);
do {
ssleep(3);
io_timeout_in_crash_mode++;
dev_dbg(&instance->pdev->dev, "waiting for [%d] "
"seconds for crash dump collection and OCR "
"to be done\n", (io_timeout_in_crash_mode * 3));
} while ((instance->adprecovery != MEGASAS_HBA_OPERATIONAL) &&
(io_timeout_in_crash_mode < 80));
if (instance->adprecovery == MEGASAS_HBA_OPERATIONAL) {
dev_info(&instance->pdev->dev, "OCR done for IO "
"timeout case\n");
retval = SUCCESS;
} else {
dev_info(&instance->pdev->dev, "Controller is not "
"operational after 240 seconds wait for IO "
"timeout case in FW crash dump mode\n do "
"OCR/kill adapter\n");
retval = megasas_reset_fusion(shost, 0);
}
return retval;
}
if (instance->requestorId && !instance->skip_heartbeat_timer_del)
del_timer_sync(&instance->sriov_heartbeat_timer);
set_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
instance->adprecovery = MEGASAS_ADPRESET_SM_POLLING;
instance->instancet->disable_intr(instance);
msleep(1000);
/* First try waiting for commands to complete */
if (megasas_wait_for_outstanding_fusion(instance, iotimeout,
&convert)) {
instance->adprecovery = MEGASAS_ADPRESET_SM_INFAULT;
printk(KERN_WARNING "megaraid_sas: resetting fusion "
"adapter scsi%d.\n", instance->host->host_no);
if (convert)
iotimeout = 0;
/* Now return commands back to the OS */
for (i = 0 ; i < instance->max_fw_cmds; i++) {
cmd_fusion = fusion->cmd_list[i];
if (cmd_fusion->scmd) {
scsi_dma_unmap(cmd_fusion->scmd);
cmd_fusion->scmd->result =
megasas_check_mpio_paths(instance,
cmd_fusion->scmd);
cmd_fusion->scmd->scsi_done(cmd_fusion->scmd);
megasas_return_cmd_fusion(instance, cmd_fusion);
atomic_dec(&instance->fw_outstanding);
}
}
status_reg = instance->instancet->read_fw_status_reg(
instance->reg_set);
abs_state = status_reg & MFI_STATE_MASK;
reset_adapter = status_reg & MFI_RESET_ADAPTER;
if (instance->disableOnlineCtrlReset ||
(abs_state == MFI_STATE_FAULT && !reset_adapter)) {
/* Reset not supported, kill adapter */
printk(KERN_WARNING "megaraid_sas: Reset not supported"
", killing adapter scsi%d.\n",
instance->host->host_no);
megaraid_sas_kill_hba(instance);
instance->skip_heartbeat_timer_del = 1;
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
retval = FAILED;
goto out;
}
/* Let SR-IOV VF & PF sync up if there was a HB failure */
if (instance->requestorId && !iotimeout) {
msleep(MEGASAS_OCR_SETTLE_TIME_VF);
/* Look for a late HB update after VF settle time */
if (abs_state == MFI_STATE_OPERATIONAL &&
(instance->hb_host_mem->HB.fwCounter !=
instance->hb_host_mem->HB.driverCounter)) {
instance->hb_host_mem->HB.driverCounter =
instance->hb_host_mem->HB.fwCounter;
printk(KERN_WARNING "megasas: SR-IOV:"
"Late FW heartbeat update for "
"scsi%d.\n",
instance->host->host_no);
} else {
/* In VF mode, first poll for FW ready */
for (i = 0;
i < (MEGASAS_RESET_WAIT_TIME * 1000);
i += 20) {
status_reg =
instance->instancet->
read_fw_status_reg(
instance->reg_set);
abs_state = status_reg &
MFI_STATE_MASK;
if (abs_state == MFI_STATE_READY) {
printk(KERN_WARNING "megasas"
": SR-IOV: FW was found"
"to be in ready state "
"for scsi%d.\n",
instance->host->host_no);
break;
}
msleep(20);
}
if (abs_state != MFI_STATE_READY) {
printk(KERN_WARNING "megasas: SR-IOV: "
"FW not in ready state after %d"
" seconds for scsi%d, status_reg = "
"0x%x.\n",
MEGASAS_RESET_WAIT_TIME,
instance->host->host_no,
status_reg);
megaraid_sas_kill_hba(instance);
instance->skip_heartbeat_timer_del = 1;
instance->adprecovery =
MEGASAS_HW_CRITICAL_ERROR;
retval = FAILED;
goto out;
}
}
}
/* Now try to reset the chip */
for (i = 0; i < MEGASAS_FUSION_MAX_RESET_TRIES; i++) {
writel(MPI2_WRSEQ_FLUSH_KEY_VALUE,
&instance->reg_set->fusion_seq_offset);
writel(MPI2_WRSEQ_1ST_KEY_VALUE,
&instance->reg_set->fusion_seq_offset);
writel(MPI2_WRSEQ_2ND_KEY_VALUE,
&instance->reg_set->fusion_seq_offset);
writel(MPI2_WRSEQ_3RD_KEY_VALUE,
&instance->reg_set->fusion_seq_offset);
writel(MPI2_WRSEQ_4TH_KEY_VALUE,
&instance->reg_set->fusion_seq_offset);
writel(MPI2_WRSEQ_5TH_KEY_VALUE,
&instance->reg_set->fusion_seq_offset);
writel(MPI2_WRSEQ_6TH_KEY_VALUE,
&instance->reg_set->fusion_seq_offset);
/* Check that the diag write enable (DRWE) bit is on */
host_diag = readl(&instance->reg_set->fusion_host_diag);
retry = 0;
while (!(host_diag & HOST_DIAG_WRITE_ENABLE)) {
msleep(100);
host_diag =
readl(&instance->reg_set->fusion_host_diag);
if (retry++ == 100) {
printk(KERN_WARNING "megaraid_sas: "
"Host diag unlock failed! "
"for scsi%d\n",
instance->host->host_no);
break;
}
}
if (!(host_diag & HOST_DIAG_WRITE_ENABLE))
continue;
/* Send chip reset command */
writel(host_diag | HOST_DIAG_RESET_ADAPTER,
&instance->reg_set->fusion_host_diag);
msleep(3000);
/* Make sure reset adapter bit is cleared */
host_diag = readl(&instance->reg_set->fusion_host_diag);
retry = 0;
while (host_diag & HOST_DIAG_RESET_ADAPTER) {
msleep(100);
host_diag =
readl(&instance->reg_set->fusion_host_diag);
if (retry++ == 1000) {
printk(KERN_WARNING "megaraid_sas: "
"Diag reset adapter never "
"cleared for scsi%d!\n",
instance->host->host_no);
break;
}
}
if (host_diag & HOST_DIAG_RESET_ADAPTER)
continue;
abs_state =
instance->instancet->read_fw_status_reg(
instance->reg_set) & MFI_STATE_MASK;
retry = 0;
while ((abs_state <= MFI_STATE_FW_INIT) &&
(retry++ < 1000)) {
msleep(100);
abs_state =
instance->instancet->read_fw_status_reg(
instance->reg_set) & MFI_STATE_MASK;
}
if (abs_state <= MFI_STATE_FW_INIT) {
printk(KERN_WARNING "megaraid_sas: firmware "
"state < MFI_STATE_FW_INIT, state = "
"0x%x for scsi%d\n", abs_state,
instance->host->host_no);
continue;
}
/* Wait for FW to become ready */
if (megasas_transition_to_ready(instance, 1)) {
printk(KERN_WARNING "megaraid_sas: Failed to "
"transition controller to ready "
"for scsi%d.\n",
instance->host->host_no);
continue;
}
megasas_reset_reply_desc(instance);
if (megasas_ioc_init_fusion(instance)) {
printk(KERN_WARNING "megaraid_sas: "
"megasas_ioc_init_fusion() failed!"
" for scsi%d\n",
instance->host->host_no);
continue;
}
/* Re-fire management commands */
for (j = 0 ; j < instance->max_fw_cmds; j++) {
cmd_fusion = fusion->cmd_list[j];
if (cmd_fusion->sync_cmd_idx !=
(u32)ULONG_MAX) {
cmd_mfi =
instance->
cmd_list[cmd_fusion->sync_cmd_idx];
if (cmd_mfi->frame->dcmd.opcode ==
cpu_to_le32(MR_DCMD_LD_MAP_GET_INFO)) {
megasas_return_mfi_mpt_pthr(instance, cmd_mfi, cmd_fusion);
} else {
req_desc =
megasas_get_request_descriptor(
instance,
cmd_mfi->context.smid
-1);
if (!req_desc) {
printk(KERN_WARNING
"req_desc NULL"
" for scsi%d\n",
instance->host->host_no);
/* Return leaked MPT
frame */
megasas_return_cmd_fusion(instance, cmd_fusion);
} else {
instance->instancet->
fire_cmd(instance,
req_desc->
u.low,
req_desc->
u.high,
instance->
reg_set);
}
}
}
}
clear_bit(MEGASAS_FUSION_IN_RESET,
&instance->reset_flags);
instance->instancet->enable_intr(instance);
instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
/* Reset load balance info */
memset(fusion->load_balance_info, 0,
sizeof(struct LD_LOAD_BALANCE_INFO)
*MAX_LOGICAL_DRIVES_EXT);
if (!megasas_get_map_info(instance))
megasas_sync_map_info(instance);
/* Restart SR-IOV heartbeat */
if (instance->requestorId) {
if (!megasas_sriov_start_heartbeat(instance, 0))
megasas_start_timer(instance,
&instance->sriov_heartbeat_timer,
megasas_sriov_heartbeat_handler,
MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
else
instance->skip_heartbeat_timer_del = 1;
}
/* Adapter reset completed successfully */
printk(KERN_WARNING "megaraid_sas: Reset "
"successful for scsi%d.\n",
instance->host->host_no);
if (instance->crash_dump_drv_support) {
if (instance->crash_dump_app_support)
megasas_set_crash_dump_params(instance,
MR_CRASH_BUF_TURN_ON);
else
megasas_set_crash_dump_params(instance,
MR_CRASH_BUF_TURN_OFF);
}
retval = SUCCESS;
goto out;
}
/* Reset failed, kill the adapter */
printk(KERN_WARNING "megaraid_sas: Reset failed, killing "
"adapter scsi%d.\n", instance->host->host_no);
megaraid_sas_kill_hba(instance);
instance->skip_heartbeat_timer_del = 1;
instance->adprecovery = MEGASAS_HW_CRITICAL_ERROR;
retval = FAILED;
} else {
/* For VF: Restart HB timer if we didn't OCR */
if (instance->requestorId) {
megasas_start_timer(instance,
&instance->sriov_heartbeat_timer,
megasas_sriov_heartbeat_handler,
MEGASAS_SRIOV_HEARTBEAT_INTERVAL_VF);
}
clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
instance->instancet->enable_intr(instance);
instance->adprecovery = MEGASAS_HBA_OPERATIONAL;
}
out:
clear_bit(MEGASAS_FUSION_IN_RESET, &instance->reset_flags);
mutex_unlock(&instance->reset_mutex);
return retval;
}
/* Fusion Crash dump collection work queue */
void megasas_fusion_crash_dump_wq(struct work_struct *work)
{
struct megasas_instance *instance =
container_of(work, struct megasas_instance, crash_init);
u32 status_reg;
u8 partial_copy = 0;
status_reg = instance->instancet->read_fw_status_reg(instance->reg_set);
/*
* Allocate host crash buffers to copy data from 1 MB DMA crash buffer
* to host crash buffers
*/
if (instance->drv_buf_index == 0) {
/* Buffer is already allocated for old Crash dump.
* Do OCR and do not wait for crash dump collection
*/
if (instance->drv_buf_alloc) {
dev_info(&instance->pdev->dev, "earlier crash dump is "
"not yet copied by application, ignoring this "
"crash dump and initiating OCR\n");
status_reg |= MFI_STATE_CRASH_DUMP_DONE;
writel(status_reg,
&instance->reg_set->outbound_scratch_pad);
readl(&instance->reg_set->outbound_scratch_pad);
return;
}
megasas_alloc_host_crash_buffer(instance);
dev_info(&instance->pdev->dev, "Number of host crash buffers "
"allocated: %d\n", instance->drv_buf_alloc);
}
/*
* Driver has allocated max buffers, which can be allocated
* and FW has more crash dump data, then driver will
* ignore the data.
*/
if (instance->drv_buf_index >= (instance->drv_buf_alloc)) {
dev_info(&instance->pdev->dev, "Driver is done copying "
"the buffer: %d\n", instance->drv_buf_alloc);
status_reg |= MFI_STATE_CRASH_DUMP_DONE;
partial_copy = 1;
} else {
memcpy(instance->crash_buf[instance->drv_buf_index],
instance->crash_dump_buf, CRASH_DMA_BUF_SIZE);
instance->drv_buf_index++;
status_reg &= ~MFI_STATE_DMADONE;
}
if (status_reg & MFI_STATE_CRASH_DUMP_DONE) {
dev_info(&instance->pdev->dev, "Crash Dump is available,number "
"of copied buffers: %d\n", instance->drv_buf_index);
instance->fw_crash_buffer_size = instance->drv_buf_index;
instance->fw_crash_state = AVAILABLE;
instance->drv_buf_index = 0;
writel(status_reg, &instance->reg_set->outbound_scratch_pad);
readl(&instance->reg_set->outbound_scratch_pad);
if (!partial_copy)
megasas_reset_fusion(instance->host, 0);
} else {
writel(status_reg, &instance->reg_set->outbound_scratch_pad);
readl(&instance->reg_set->outbound_scratch_pad);
}
}
/* Fusion OCR work queue */
void megasas_fusion_ocr_wq(struct work_struct *work)
{
struct megasas_instance *instance =
container_of(work, struct megasas_instance, work_init);
megasas_reset_fusion(instance->host, 0);
}
struct megasas_instance_template megasas_instance_template_fusion = {
.fire_cmd = megasas_fire_cmd_fusion,
.enable_intr = megasas_enable_intr_fusion,
.disable_intr = megasas_disable_intr_fusion,
.clear_intr = megasas_clear_intr_fusion,
.read_fw_status_reg = megasas_read_fw_status_reg_fusion,
.adp_reset = megasas_adp_reset_fusion,
.check_reset = megasas_check_reset_fusion,
.service_isr = megasas_isr_fusion,
.tasklet = megasas_complete_cmd_dpc_fusion,
.init_adapter = megasas_init_adapter_fusion,
.build_and_issue_cmd = megasas_build_and_issue_cmd_fusion,
.issue_dcmd = megasas_issue_dcmd_fusion,
};
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