[SCSI] MegaRAID SAS RAID: new driver
Signed-off-by: Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
diff --git a/drivers/scsi/Makefile b/drivers/scsi/Makefile
index 1e4edbd..48529d1 100644
--- a/drivers/scsi/Makefile
+++ b/drivers/scsi/Makefile
@@ -99,6 +99,7 @@
obj-$(CONFIG_SCSI_DC390T) += tmscsim.o
obj-$(CONFIG_MEGARAID_LEGACY) += megaraid.o
obj-$(CONFIG_MEGARAID_NEWGEN) += megaraid/
+obj-$(CONFIG_MEGARAID_SAS) += megaraid/
obj-$(CONFIG_SCSI_ACARD) += atp870u.o
obj-$(CONFIG_SCSI_SUNESP) += esp.o
obj-$(CONFIG_SCSI_GDTH) += gdth.o
diff --git a/drivers/scsi/megaraid/Kconfig.megaraid b/drivers/scsi/megaraid/Kconfig.megaraid
index 917d591..7363e12 100644
--- a/drivers/scsi/megaraid/Kconfig.megaraid
+++ b/drivers/scsi/megaraid/Kconfig.megaraid
@@ -76,3 +76,12 @@
To compile this driver as a module, choose M here: the
module will be called megaraid
endif
+
+config MEGARAID_SAS
+ tristate "LSI Logic MegaRAID SAS RAID Module"
+ depends on PCI && SCSI
+ help
+ Module for LSI Logic's SAS based RAID controllers.
+ To compile this driver as a module, choose 'm' here.
+ Module will be called megaraid_sas
+
diff --git a/drivers/scsi/megaraid/Makefile b/drivers/scsi/megaraid/Makefile
index 6dd99f2..f469915 100644
--- a/drivers/scsi/megaraid/Makefile
+++ b/drivers/scsi/megaraid/Makefile
@@ -1,2 +1,3 @@
obj-$(CONFIG_MEGARAID_MM) += megaraid_mm.o
obj-$(CONFIG_MEGARAID_MAILBOX) += megaraid_mbox.o
+obj-$(CONFIG_MEGARAID_SAS) += megaraid_sas.o
diff --git a/drivers/scsi/megaraid/megaraid_sas.c b/drivers/scsi/megaraid/megaraid_sas.c
new file mode 100644
index 0000000..1b3148e
--- /dev/null
+++ b/drivers/scsi/megaraid/megaraid_sas.c
@@ -0,0 +1,2805 @@
+/*
+ *
+ * Linux MegaRAID driver for SAS based RAID controllers
+ *
+ * Copyright (c) 2003-2005 LSI Logic 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.
+ *
+ * FILE : megaraid_sas.c
+ * Version : v00.00.02.00-rc4
+ *
+ * Authors:
+ * Sreenivas Bagalkote <Sreenivas.Bagalkote@lsil.com>
+ * Sumant Patro <Sumant.Patro@lsil.com>
+ *
+ * List of supported controllers
+ *
+ * OEM Product Name VID DID SSVID SSID
+ * --- ------------ --- --- ---- ----
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/list.h>
+#include <linux/version.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 <asm/uaccess.h>
+#include <linux/compat.h>
+
+#include <scsi/scsi.h>
+#include <scsi/scsi_cmnd.h>
+#include <scsi/scsi_device.h>
+#include <scsi/scsi_host.h>
+#include "megaraid_sas.h"
+
+MODULE_LICENSE("GPL");
+MODULE_VERSION(MEGASAS_VERSION);
+MODULE_AUTHOR("sreenivas.bagalkote@lsil.com");
+MODULE_DESCRIPTION("LSI Logic MegaRAID SAS Driver");
+
+/*
+ * PCI ID table for all supported controllers
+ */
+static struct pci_device_id megasas_pci_table[] = {
+
+ {
+ PCI_VENDOR_ID_LSI_LOGIC,
+ PCI_DEVICE_ID_LSI_SAS1064R,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {
+ PCI_VENDOR_ID_DELL,
+ PCI_DEVICE_ID_DELL_PERC5,
+ PCI_ANY_ID,
+ PCI_ANY_ID,
+ },
+ {0} /* Terminating entry */
+};
+
+MODULE_DEVICE_TABLE(pci, megasas_pci_table);
+
+static int megasas_mgmt_majorno;
+static struct megasas_mgmt_info megasas_mgmt_info;
+static struct fasync_struct *megasas_async_queue;
+static DECLARE_MUTEX(megasas_async_queue_mutex);
+
+/**
+ * megasas_get_cmd - Get a command from the free pool
+ * @instance: Adapter soft state
+ *
+ * Returns a free command from the pool
+ */
+static inline struct megasas_cmd *megasas_get_cmd(struct megasas_instance
+ *instance)
+{
+ unsigned long flags;
+ struct megasas_cmd *cmd = NULL;
+
+ spin_lock_irqsave(&instance->cmd_pool_lock, flags);
+
+ if (!list_empty(&instance->cmd_pool)) {
+ cmd = list_entry((&instance->cmd_pool)->next,
+ struct megasas_cmd, list);
+ list_del_init(&cmd->list);
+ } else {
+ printk(KERN_ERR "megasas: Command pool empty!\n");
+ }
+
+ spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
+ 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
+ */
+static inline void
+megasas_return_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&instance->cmd_pool_lock, flags);
+
+ cmd->scmd = NULL;
+ list_add_tail(&cmd->list, &instance->cmd_pool);
+
+ spin_unlock_irqrestore(&instance->cmd_pool_lock, flags);
+}
+
+/**
+ * megasas_enable_intr - Enables interrupts
+ * @regs: MFI register set
+ */
+static inline void
+megasas_enable_intr(struct megasas_register_set __iomem * regs)
+{
+ writel(1, &(regs)->outbound_intr_mask);
+
+ /* Dummy readl to force pci flush */
+ readl(®s->outbound_intr_mask);
+}
+
+/**
+ * megasas_disable_intr - Disables interrupts
+ * @regs: MFI register set
+ */
+static inline void
+megasas_disable_intr(struct megasas_register_set __iomem * regs)
+{
+ u32 mask = readl(®s->outbound_intr_mask) & (~0x00000001);
+ writel(mask, ®s->outbound_intr_mask);
+
+ /* Dummy readl to force pci flush */
+ readl(®s->outbound_intr_mask);
+}
+
+/**
+ * megasas_issue_polled - 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.
+ */
+static int
+megasas_issue_polled(struct megasas_instance *instance, struct megasas_cmd *cmd)
+{
+ int i;
+ u32 msecs = MFI_POLL_TIMEOUT_SECS * 1000;
+
+ struct megasas_header *frame_hdr = &cmd->frame->hdr;
+
+ frame_hdr->cmd_status = 0xFF;
+ frame_hdr->flags |= MFI_FRAME_DONT_POST_IN_REPLY_QUEUE;
+
+ /*
+ * Issue the frame using inbound queue port
+ */
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ /*
+ * Wait for cmd_status to change
+ */
+ for (i = 0; (i < msecs) && (frame_hdr->cmd_status == 0xff); i++) {
+ rmb();
+ msleep(1);
+ }
+
+ if (frame_hdr->cmd_status == 0xff)
+ return -ETIME;
+
+ return 0;
+}
+
+/**
+ * megasas_issue_blocked_cmd - Synchronous wrapper around regular FW cmds
+ * @instance: Adapter soft state
+ * @cmd: Command to be issued
+ *
+ * This function waits on an event for the command to be returned from ISR.
+ * Used to issue ioctl commands.
+ */
+static int
+megasas_issue_blocked_cmd(struct megasas_instance *instance,
+ struct megasas_cmd *cmd)
+{
+ cmd->cmd_status = ENODATA;
+
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ wait_event(instance->int_cmd_wait_q, (cmd->cmd_status != ENODATA));
+
+ return 0;
+}
+
+/**
+ * megasas_issue_blocked_abort_cmd - Aborts previously issued cmd
+ * @instance: Adapter soft state
+ * @cmd_to_abort: Previously issued cmd to be aborted
+ *
+ * MFI firmware can abort previously issued AEN comamnd (automatic event
+ * notification). The megasas_issue_blocked_abort_cmd() issues such abort
+ * cmd and blocks till it is completed.
+ */
+static int
+megasas_issue_blocked_abort_cmd(struct megasas_instance *instance,
+ struct megasas_cmd *cmd_to_abort)
+{
+ struct megasas_cmd *cmd;
+ struct megasas_abort_frame *abort_fr;
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd)
+ return -1;
+
+ abort_fr = &cmd->frame->abort;
+
+ /*
+ * Prepare and issue the abort frame
+ */
+ abort_fr->cmd = MFI_CMD_ABORT;
+ abort_fr->cmd_status = 0xFF;
+ abort_fr->flags = 0;
+ abort_fr->abort_context = cmd_to_abort->index;
+ abort_fr->abort_mfi_phys_addr_lo = cmd_to_abort->frame_phys_addr;
+ abort_fr->abort_mfi_phys_addr_hi = 0;
+
+ cmd->sync_cmd = 1;
+ cmd->cmd_status = 0xFF;
+
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ /*
+ * Wait for this cmd to complete
+ */
+ wait_event(instance->abort_cmd_wait_q, (cmd->cmd_status != 0xFF));
+
+ megasas_return_cmd(instance, cmd);
+ return 0;
+}
+
+/**
+ * megasas_make_sgl32 - Prepares 32-bit SGL
+ * @instance: Adapter soft state
+ * @scp: SCSI command from the mid-layer
+ * @mfi_sgl: SGL to be filled in
+ *
+ * If successful, this function returns the number of SG elements. Otherwise,
+ * it returnes -1.
+ */
+static inline int
+megasas_make_sgl32(struct megasas_instance *instance, struct scsi_cmnd *scp,
+ union megasas_sgl *mfi_sgl)
+{
+ int i;
+ int sge_count;
+ struct scatterlist *os_sgl;
+
+ /*
+ * Return 0 if there is no data transfer
+ */
+ if (!scp->request_buffer || !scp->request_bufflen)
+ return 0;
+
+ if (!scp->use_sg) {
+ mfi_sgl->sge32[0].phys_addr = pci_map_single(instance->pdev,
+ scp->
+ request_buffer,
+ scp->
+ request_bufflen,
+ scp->
+ sc_data_direction);
+ mfi_sgl->sge32[0].length = scp->request_bufflen;
+
+ return 1;
+ }
+
+ os_sgl = (struct scatterlist *)scp->request_buffer;
+ sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
+ scp->sc_data_direction);
+
+ for (i = 0; i < sge_count; i++, os_sgl++) {
+ mfi_sgl->sge32[i].length = sg_dma_len(os_sgl);
+ mfi_sgl->sge32[i].phys_addr = sg_dma_address(os_sgl);
+ }
+
+ return sge_count;
+}
+
+/**
+ * megasas_make_sgl64 - Prepares 64-bit SGL
+ * @instance: Adapter soft state
+ * @scp: SCSI command from the mid-layer
+ * @mfi_sgl: SGL to be filled in
+ *
+ * If successful, this function returns the number of SG elements. Otherwise,
+ * it returnes -1.
+ */
+static inline int
+megasas_make_sgl64(struct megasas_instance *instance, struct scsi_cmnd *scp,
+ union megasas_sgl *mfi_sgl)
+{
+ int i;
+ int sge_count;
+ struct scatterlist *os_sgl;
+
+ /*
+ * Return 0 if there is no data transfer
+ */
+ if (!scp->request_buffer || !scp->request_bufflen)
+ return 0;
+
+ if (!scp->use_sg) {
+ mfi_sgl->sge64[0].phys_addr = pci_map_single(instance->pdev,
+ scp->
+ request_buffer,
+ scp->
+ request_bufflen,
+ scp->
+ sc_data_direction);
+
+ mfi_sgl->sge64[0].length = scp->request_bufflen;
+
+ return 1;
+ }
+
+ os_sgl = (struct scatterlist *)scp->request_buffer;
+ sge_count = pci_map_sg(instance->pdev, os_sgl, scp->use_sg,
+ scp->sc_data_direction);
+
+ for (i = 0; i < sge_count; i++, os_sgl++) {
+ mfi_sgl->sge64[i].length = sg_dma_len(os_sgl);
+ mfi_sgl->sge64[i].phys_addr = sg_dma_address(os_sgl);
+ }
+
+ return sge_count;
+}
+
+/**
+ * megasas_build_dcdb - Prepares a direct cdb (DCDB) command
+ * @instance: Adapter soft state
+ * @scp: SCSI command
+ * @cmd: Command to be prepared in
+ *
+ * This function prepares CDB commands. These are typcially pass-through
+ * commands to the devices.
+ */
+static inline int
+megasas_build_dcdb(struct megasas_instance *instance, struct scsi_cmnd *scp,
+ struct megasas_cmd *cmd)
+{
+ u32 sge_sz;
+ int sge_bytes;
+ u32 is_logical;
+ u32 device_id;
+ u16 flags = 0;
+ struct megasas_pthru_frame *pthru;
+
+ is_logical = MEGASAS_IS_LOGICAL(scp);
+ device_id = MEGASAS_DEV_INDEX(instance, scp);
+ pthru = (struct megasas_pthru_frame *)cmd->frame;
+
+ if (scp->sc_data_direction == PCI_DMA_TODEVICE)
+ flags = MFI_FRAME_DIR_WRITE;
+ else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
+ flags = MFI_FRAME_DIR_READ;
+ else if (scp->sc_data_direction == PCI_DMA_NONE)
+ flags = MFI_FRAME_DIR_NONE;
+
+ /*
+ * Prepare the DCDB frame
+ */
+ pthru->cmd = (is_logical) ? MFI_CMD_LD_SCSI_IO : MFI_CMD_PD_SCSI_IO;
+ pthru->cmd_status = 0x0;
+ pthru->scsi_status = 0x0;
+ pthru->target_id = device_id;
+ pthru->lun = scp->device->lun;
+ pthru->cdb_len = scp->cmd_len;
+ pthru->timeout = 0;
+ pthru->flags = flags;
+ pthru->data_xfer_len = scp->request_bufflen;
+
+ memcpy(pthru->cdb, scp->cmnd, scp->cmd_len);
+
+ /*
+ * Construct SGL
+ */
+ sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
+ sizeof(struct megasas_sge32);
+
+ if (IS_DMA64) {
+ pthru->flags |= MFI_FRAME_SGL64;
+ pthru->sge_count = megasas_make_sgl64(instance, scp,
+ &pthru->sgl);
+ } else
+ pthru->sge_count = megasas_make_sgl32(instance, scp,
+ &pthru->sgl);
+
+ /*
+ * Sense info specific
+ */
+ pthru->sense_len = SCSI_SENSE_BUFFERSIZE;
+ pthru->sense_buf_phys_addr_hi = 0;
+ pthru->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
+
+ sge_bytes = sge_sz * pthru->sge_count;
+
+ /*
+ * Compute the total number of frames this command consumes. FW uses
+ * this number to pull sufficient number of frames from host memory.
+ */
+ cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
+ ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
+
+ if (cmd->frame_count > 7)
+ cmd->frame_count = 8;
+
+ return cmd->frame_count;
+}
+
+/**
+ * megasas_build_ldio - Prepares IOs to logical devices
+ * @instance: Adapter soft state
+ * @scp: SCSI command
+ * @cmd: Command to to be prepared
+ *
+ * Frames (and accompanying SGLs) for regular SCSI IOs use this function.
+ */
+static inline int
+megasas_build_ldio(struct megasas_instance *instance, struct scsi_cmnd *scp,
+ struct megasas_cmd *cmd)
+{
+ u32 sge_sz;
+ int sge_bytes;
+ u32 device_id;
+ u8 sc = scp->cmnd[0];
+ u16 flags = 0;
+ struct megasas_io_frame *ldio;
+
+ device_id = MEGASAS_DEV_INDEX(instance, scp);
+ ldio = (struct megasas_io_frame *)cmd->frame;
+
+ if (scp->sc_data_direction == PCI_DMA_TODEVICE)
+ flags = MFI_FRAME_DIR_WRITE;
+ else if (scp->sc_data_direction == PCI_DMA_FROMDEVICE)
+ flags = MFI_FRAME_DIR_READ;
+
+ /*
+ * Preare the Logical IO frame: 2nd bit is zero for all read cmds
+ */
+ ldio->cmd = (sc & 0x02) ? MFI_CMD_LD_WRITE : MFI_CMD_LD_READ;
+ ldio->cmd_status = 0x0;
+ ldio->scsi_status = 0x0;
+ ldio->target_id = device_id;
+ ldio->timeout = 0;
+ ldio->reserved_0 = 0;
+ ldio->pad_0 = 0;
+ ldio->flags = flags;
+ ldio->start_lba_hi = 0;
+ ldio->access_byte = (scp->cmd_len != 6) ? scp->cmnd[1] : 0;
+
+ /*
+ * 6-byte READ(0x08) or WRITE(0x0A) cdb
+ */
+ if (scp->cmd_len == 6) {
+ ldio->lba_count = (u32) scp->cmnd[4];
+ ldio->start_lba_lo = ((u32) scp->cmnd[1] << 16) |
+ ((u32) scp->cmnd[2] << 8) | (u32) scp->cmnd[3];
+
+ ldio->start_lba_lo &= 0x1FFFFF;
+ }
+
+ /*
+ * 10-byte READ(0x28) or WRITE(0x2A) cdb
+ */
+ else if (scp->cmd_len == 10) {
+ ldio->lba_count = (u32) scp->cmnd[8] |
+ ((u32) scp->cmnd[7] << 8);
+ ldio->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) {
+ ldio->lba_count = ((u32) scp->cmnd[6] << 24) |
+ ((u32) scp->cmnd[7] << 16) |
+ ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
+
+ ldio->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) {
+ ldio->lba_count = ((u32) scp->cmnd[10] << 24) |
+ ((u32) scp->cmnd[11] << 16) |
+ ((u32) scp->cmnd[12] << 8) | (u32) scp->cmnd[13];
+
+ ldio->start_lba_lo = ((u32) scp->cmnd[6] << 24) |
+ ((u32) scp->cmnd[7] << 16) |
+ ((u32) scp->cmnd[8] << 8) | (u32) scp->cmnd[9];
+
+ ldio->start_lba_hi = ((u32) scp->cmnd[2] << 24) |
+ ((u32) scp->cmnd[3] << 16) |
+ ((u32) scp->cmnd[4] << 8) | (u32) scp->cmnd[5];
+
+ }
+
+ /*
+ * Construct SGL
+ */
+ sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
+ sizeof(struct megasas_sge32);
+
+ if (IS_DMA64) {
+ ldio->flags |= MFI_FRAME_SGL64;
+ ldio->sge_count = megasas_make_sgl64(instance, scp, &ldio->sgl);
+ } else
+ ldio->sge_count = megasas_make_sgl32(instance, scp, &ldio->sgl);
+
+ /*
+ * Sense info specific
+ */
+ ldio->sense_len = SCSI_SENSE_BUFFERSIZE;
+ ldio->sense_buf_phys_addr_hi = 0;
+ ldio->sense_buf_phys_addr_lo = cmd->sense_phys_addr;
+
+ sge_bytes = sge_sz * ldio->sge_count;
+
+ cmd->frame_count = (sge_bytes / MEGAMFI_FRAME_SIZE) +
+ ((sge_bytes % MEGAMFI_FRAME_SIZE) ? 1 : 0) + 1;
+
+ if (cmd->frame_count > 7)
+ cmd->frame_count = 8;
+
+ return cmd->frame_count;
+}
+
+/**
+ * megasas_build_cmd - Prepares a command packet
+ * @instance: Adapter soft state
+ * @scp: SCSI command
+ * @frame_count: [OUT] Number of frames used to prepare this command
+ */
+static inline struct megasas_cmd *megasas_build_cmd(struct megasas_instance
+ *instance,
+ struct scsi_cmnd *scp,
+ int *frame_count)
+{
+ u32 logical_cmd;
+ struct megasas_cmd *cmd;
+
+ /*
+ * Find out if this is logical or physical drive command.
+ */
+ logical_cmd = MEGASAS_IS_LOGICAL(scp);
+
+ /*
+ * Logical drive command
+ */
+ if (logical_cmd) {
+
+ if (scp->device->id >= MEGASAS_MAX_LD) {
+ scp->result = DID_BAD_TARGET << 16;
+ return NULL;
+ }
+
+ switch (scp->cmnd[0]) {
+
+ case READ_10:
+ case WRITE_10:
+ case READ_12:
+ case WRITE_12:
+ case READ_6:
+ case WRITE_6:
+ case READ_16:
+ case WRITE_16:
+ /*
+ * Fail for LUN > 0
+ */
+ if (scp->device->lun) {
+ scp->result = DID_BAD_TARGET << 16;
+ return NULL;
+ }
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ scp->result = DID_IMM_RETRY << 16;
+ return NULL;
+ }
+
+ *frame_count = megasas_build_ldio(instance, scp, cmd);
+
+ if (!(*frame_count)) {
+ megasas_return_cmd(instance, cmd);
+ return NULL;
+ }
+
+ return cmd;
+
+ default:
+ /*
+ * Fail for LUN > 0
+ */
+ if (scp->device->lun) {
+ scp->result = DID_BAD_TARGET << 16;
+ return NULL;
+ }
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ scp->result = DID_IMM_RETRY << 16;
+ return NULL;
+ }
+
+ *frame_count = megasas_build_dcdb(instance, scp, cmd);
+
+ if (!(*frame_count)) {
+ megasas_return_cmd(instance, cmd);
+ return NULL;
+ }
+
+ return cmd;
+ }
+ } else {
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ scp->result = DID_IMM_RETRY << 16;
+ return NULL;
+ }
+
+ *frame_count = megasas_build_dcdb(instance, scp, cmd);
+
+ if (!(*frame_count)) {
+ megasas_return_cmd(instance, cmd);
+ return NULL;
+ }
+
+ return cmd;
+ }
+
+ return NULL;
+}
+
+/**
+ * megasas_queue_command - Queue entry point
+ * @scmd: SCSI command to be queued
+ * @done: Callback entry point
+ */
+static int
+megasas_queue_command(struct scsi_cmnd *scmd, void (*done) (struct scsi_cmnd *))
+{
+ u32 frame_count;
+ unsigned long flags;
+ struct megasas_cmd *cmd;
+ struct megasas_instance *instance;
+
+ instance = (struct megasas_instance *)
+ scmd->device->host->hostdata;
+ scmd->scsi_done = done;
+ scmd->result = 0;
+
+ cmd = megasas_build_cmd(instance, scmd, &frame_count);
+
+ if (!cmd) {
+ done(scmd);
+ return 0;
+ }
+
+ cmd->scmd = scmd;
+ scmd->SCp.ptr = (char *)cmd;
+ scmd->SCp.sent_command = jiffies;
+
+ /*
+ * Issue the command to the FW
+ */
+ spin_lock_irqsave(&instance->instance_lock, flags);
+ instance->fw_outstanding++;
+ spin_unlock_irqrestore(&instance->instance_lock, flags);
+
+ writel(((cmd->frame_phys_addr >> 3) | (cmd->frame_count - 1)),
+ &instance->reg_set->inbound_queue_port);
+
+ return 0;
+}
+
+/**
+ * megasas_wait_for_outstanding - Wait for all outstanding cmds
+ * @instance: Adapter soft state
+ *
+ * This function waits for upto MEGASAS_RESET_WAIT_TIME seconds for FW to
+ * complete all its outstanding commands. Returns error if one or more IOs
+ * are pending after this time period. It also marks the controller dead.
+ */
+static int megasas_wait_for_outstanding(struct megasas_instance *instance)
+{
+ int i;
+ u32 wait_time = MEGASAS_RESET_WAIT_TIME;
+
+ for (i = 0; i < wait_time; i++) {
+
+ if (!instance->fw_outstanding)
+ break;
+
+ if (!(i % MEGASAS_RESET_NOTICE_INTERVAL)) {
+ printk(KERN_NOTICE "megasas: [%2d]waiting for %d "
+ "commands to complete\n", i,
+ instance->fw_outstanding);
+ }
+
+ msleep(1000);
+ }
+
+ if (instance->fw_outstanding) {
+ instance->hw_crit_error = 1;
+ return FAILED;
+ }
+
+ return SUCCESS;
+}
+
+/**
+ * megasas_generic_reset - Generic reset routine
+ * @scmd: Mid-layer SCSI command
+ *
+ * This routine implements a generic reset handler for device, bus and host
+ * reset requests. Device, bus and host specific reset handlers can use this
+ * function after they do their specific tasks.
+ */
+static int megasas_generic_reset(struct scsi_cmnd *scmd)
+{
+ int ret_val;
+ struct megasas_instance *instance;
+
+ instance = (struct megasas_instance *)scmd->device->host->hostdata;
+
+ printk(KERN_NOTICE "megasas: RESET -%ld cmd=%x <c=%d t=%d l=%d>\n",
+ scmd->serial_number, scmd->cmnd[0], scmd->device->channel,
+ scmd->device->id, scmd->device->lun);
+
+ if (instance->hw_crit_error) {
+ printk(KERN_ERR "megasas: cannot recover from previous reset "
+ "failures\n");
+ return FAILED;
+ }
+
+ spin_unlock(scmd->device->host->host_lock);
+
+ ret_val = megasas_wait_for_outstanding(instance);
+
+ if (ret_val == SUCCESS)
+ printk(KERN_NOTICE "megasas: reset successful \n");
+ else
+ printk(KERN_ERR "megasas: failed to do reset\n");
+
+ spin_lock(scmd->device->host->host_lock);
+
+ return ret_val;
+}
+
+static enum scsi_eh_timer_return megasas_reset_timer(struct scsi_cmnd *scmd)
+{
+ unsigned long seconds;
+
+ if (scmd->SCp.ptr) {
+ seconds = (jiffies - scmd->SCp.sent_command) / HZ;
+
+ if (seconds < 90) {
+ return EH_RESET_TIMER;
+ } else {
+ return EH_NOT_HANDLED;
+ }
+ }
+
+ return EH_HANDLED;
+}
+
+/**
+ * megasas_reset_device - Device reset handler entry point
+ */
+static int megasas_reset_device(struct scsi_cmnd *scmd)
+{
+ int ret;
+
+ /*
+ * First wait for all commands to complete
+ */
+ ret = megasas_generic_reset(scmd);
+
+ return ret;
+}
+
+/**
+ * megasas_reset_bus_host - Bus & host reset handler entry point
+ */
+static int megasas_reset_bus_host(struct scsi_cmnd *scmd)
+{
+ int ret;
+
+ /*
+ * Frist wait for all commands to complete
+ */
+ ret = megasas_generic_reset(scmd);
+
+ return ret;
+}
+
+/**
+ * megasas_service_aen - Processes an event notification
+ * @instance: Adapter soft state
+ * @cmd: AEN command completed by the ISR
+ *
+ * For AEN, driver sends a command down to FW that is held by the FW till an
+ * event occurs. When an event of interest occurs, FW completes the command
+ * that it was previously holding.
+ *
+ * This routines sends SIGIO signal to processes that have registered with the
+ * driver for AEN.
+ */
+static void
+megasas_service_aen(struct megasas_instance *instance, struct megasas_cmd *cmd)
+{
+ /*
+ * Don't signal app if it is just an aborted previously registered aen
+ */
+ if (!cmd->abort_aen)
+ kill_fasync(&megasas_async_queue, SIGIO, POLL_IN);
+ else
+ cmd->abort_aen = 0;
+
+ instance->aen_cmd = NULL;
+ megasas_return_cmd(instance, cmd);
+}
+
+/*
+ * Scsi host template for megaraid_sas driver
+ */
+static struct scsi_host_template megasas_template = {
+
+ .module = THIS_MODULE,
+ .name = "LSI Logic SAS based MegaRAID driver",
+ .proc_name = "megaraid_sas",
+ .queuecommand = megasas_queue_command,
+ .eh_device_reset_handler = megasas_reset_device,
+ .eh_bus_reset_handler = megasas_reset_bus_host,
+ .eh_host_reset_handler = megasas_reset_bus_host,
+ .eh_timed_out = megasas_reset_timer,
+ .use_clustering = ENABLE_CLUSTERING,
+};
+
+/**
+ * megasas_complete_int_cmd - Completes an internal command
+ * @instance: Adapter soft state
+ * @cmd: Command to be completed
+ *
+ * The megasas_issue_blocked_cmd() function waits for a command to complete
+ * after it issues a command. This function wakes up that waiting routine by
+ * calling wake_up() on the wait queue.
+ */
+static void
+megasas_complete_int_cmd(struct megasas_instance *instance,
+ struct megasas_cmd *cmd)
+{
+ cmd->cmd_status = cmd->frame->io.cmd_status;
+
+ if (cmd->cmd_status == ENODATA) {
+ cmd->cmd_status = 0;
+ }
+ wake_up(&instance->int_cmd_wait_q);
+}
+
+/**
+ * megasas_complete_abort - Completes aborting a command
+ * @instance: Adapter soft state
+ * @cmd: Cmd that was issued to abort another cmd
+ *
+ * The megasas_issue_blocked_abort_cmd() function waits on abort_cmd_wait_q
+ * after it issues an abort on a previously issued command. This function
+ * wakes up all functions waiting on the same wait queue.
+ */
+static void
+megasas_complete_abort(struct megasas_instance *instance,
+ struct megasas_cmd *cmd)
+{
+ if (cmd->sync_cmd) {
+ cmd->sync_cmd = 0;
+ cmd->cmd_status = 0;
+ wake_up(&instance->abort_cmd_wait_q);
+ }
+
+ return;
+}
+
+/**
+ * megasas_unmap_sgbuf - Unmap SG buffers
+ * @instance: Adapter soft state
+ * @cmd: Completed command
+ */
+static inline void
+megasas_unmap_sgbuf(struct megasas_instance *instance, struct megasas_cmd *cmd)
+{
+ dma_addr_t buf_h;
+ u8 opcode;
+
+ if (cmd->scmd->use_sg) {
+ pci_unmap_sg(instance->pdev, cmd->scmd->request_buffer,
+ cmd->scmd->use_sg, cmd->scmd->sc_data_direction);
+ return;
+ }
+
+ if (!cmd->scmd->request_bufflen)
+ return;
+
+ opcode = cmd->frame->hdr.cmd;
+
+ if ((opcode == MFI_CMD_LD_READ) || (opcode == MFI_CMD_LD_WRITE)) {
+ if (IS_DMA64)
+ buf_h = cmd->frame->io.sgl.sge64[0].phys_addr;
+ else
+ buf_h = cmd->frame->io.sgl.sge32[0].phys_addr;
+ } else {
+ if (IS_DMA64)
+ buf_h = cmd->frame->pthru.sgl.sge64[0].phys_addr;
+ else
+ buf_h = cmd->frame->pthru.sgl.sge32[0].phys_addr;
+ }
+
+ pci_unmap_single(instance->pdev, buf_h, cmd->scmd->request_bufflen,
+ cmd->scmd->sc_data_direction);
+ return;
+}
+
+/**
+ * megasas_complete_cmd - Completes a command
+ * @instance: Adapter soft state
+ * @cmd: Command to be completed
+ * @alt_status: If non-zero, use this value as status to
+ * SCSI mid-layer instead of the value returned
+ * by the FW. This should be used if caller wants
+ * an alternate status (as in the case of aborted
+ * commands)
+ */
+static inline void
+megasas_complete_cmd(struct megasas_instance *instance, struct megasas_cmd *cmd,
+ u8 alt_status)
+{
+ int exception = 0;
+ struct megasas_header *hdr = &cmd->frame->hdr;
+ unsigned long flags;
+
+ if (cmd->scmd) {
+ cmd->scmd->SCp.ptr = (char *)0;
+ }
+
+ switch (hdr->cmd) {
+
+ case MFI_CMD_PD_SCSI_IO:
+ case MFI_CMD_LD_SCSI_IO:
+
+ /*
+ * MFI_CMD_PD_SCSI_IO and MFI_CMD_LD_SCSI_IO could have been
+ * issued either through an IO path or an IOCTL path. If it
+ * was via IOCTL, we will send it to internal completion.
+ */
+ if (cmd->sync_cmd) {
+ cmd->sync_cmd = 0;
+ megasas_complete_int_cmd(instance, cmd);
+ break;
+ }
+
+ /*
+ * Don't export physical disk devices to mid-layer.
+ */
+ if (!MEGASAS_IS_LOGICAL(cmd->scmd) &&
+ (hdr->cmd_status == MFI_STAT_OK) &&
+ (cmd->scmd->cmnd[0] == INQUIRY)) {
+
+ if (((*(u8 *) cmd->scmd->request_buffer) & 0x1F) ==
+ TYPE_DISK) {
+ cmd->scmd->result = DID_BAD_TARGET << 16;
+ exception = 1;
+ }
+ }
+
+ case MFI_CMD_LD_READ:
+ case MFI_CMD_LD_WRITE:
+
+ if (alt_status) {
+ cmd->scmd->result = alt_status << 16;
+ exception = 1;
+ }
+
+ if (exception) {
+
+ spin_lock_irqsave(&instance->instance_lock, flags);
+ instance->fw_outstanding--;
+ spin_unlock_irqrestore(&instance->instance_lock, flags);
+
+ megasas_unmap_sgbuf(instance, cmd);
+ cmd->scmd->scsi_done(cmd->scmd);
+ megasas_return_cmd(instance, cmd);
+
+ break;
+ }
+
+ switch (hdr->cmd_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) | hdr->scsi_status;
+ break;
+
+ case MFI_STAT_SCSI_DONE_WITH_ERROR:
+
+ cmd->scmd->result = (DID_OK << 16) | hdr->scsi_status;
+
+ if (hdr->scsi_status == SAM_STAT_CHECK_CONDITION) {
+ memset(cmd->scmd->sense_buffer, 0,
+ SCSI_SENSE_BUFFERSIZE);
+ memcpy(cmd->scmd->sense_buffer, cmd->sense,
+ hdr->sense_len);
+
+ 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;
+
+ default:
+ printk(KERN_DEBUG "megasas: MFI FW status %#x\n",
+ hdr->cmd_status);
+ cmd->scmd->result = DID_ERROR << 16;
+ break;
+ }
+
+ spin_lock_irqsave(&instance->instance_lock, flags);
+ instance->fw_outstanding--;
+ spin_unlock_irqrestore(&instance->instance_lock, flags);
+
+ megasas_unmap_sgbuf(instance, cmd);
+ cmd->scmd->scsi_done(cmd->scmd);
+ megasas_return_cmd(instance, cmd);
+
+ break;
+
+ case MFI_CMD_SMP:
+ case MFI_CMD_STP:
+ case MFI_CMD_DCMD:
+
+ /*
+ * See if got an event notification
+ */
+ if (cmd->frame->dcmd.opcode == MR_DCMD_CTRL_EVENT_WAIT)
+ megasas_service_aen(instance, cmd);
+ else
+ megasas_complete_int_cmd(instance, cmd);
+
+ break;
+
+ case MFI_CMD_ABORT:
+ /*
+ * Cmd issued to abort another cmd returned
+ */
+ megasas_complete_abort(instance, cmd);
+ break;
+
+ default:
+ printk("megasas: Unknown command completed! [0x%X]\n",
+ hdr->cmd);
+ break;
+ }
+}
+
+/**
+ * megasas_deplete_reply_queue - Processes all completed commands
+ * @instance: Adapter soft state
+ * @alt_status: Alternate status to be returned to
+ * SCSI mid-layer instead of the status
+ * returned by the FW
+ */
+static inline int
+megasas_deplete_reply_queue(struct megasas_instance *instance, u8 alt_status)
+{
+ u32 status;
+ u32 producer;
+ u32 consumer;
+ u32 context;
+ struct megasas_cmd *cmd;
+
+ /*
+ * Check if it is our interrupt
+ */
+ status = readl(&instance->reg_set->outbound_intr_status);
+
+ if (!(status & MFI_OB_INTR_STATUS_MASK)) {
+ return IRQ_NONE;
+ }
+
+ /*
+ * Clear the interrupt by writing back the same value
+ */
+ writel(status, &instance->reg_set->outbound_intr_status);
+
+ producer = *instance->producer;
+ consumer = *instance->consumer;
+
+ while (consumer != producer) {
+ context = instance->reply_queue[consumer];
+
+ cmd = instance->cmd_list[context];
+
+ megasas_complete_cmd(instance, cmd, alt_status);
+
+ consumer++;
+ if (consumer == (instance->max_fw_cmds + 1)) {
+ consumer = 0;
+ }
+ }
+
+ *instance->consumer = producer;
+
+ return IRQ_HANDLED;
+}
+
+/**
+ * megasas_isr - isr entry point
+ */
+static irqreturn_t megasas_isr(int irq, void *devp, struct pt_regs *regs)
+{
+ return megasas_deplete_reply_queue((struct megasas_instance *)devp,
+ DID_OK);
+}
+
+/**
+ * megasas_transition_to_ready - Move the FW to READY state
+ * @reg_set: MFI register set
+ *
+ * During the initialization, FW passes can potentially be in any one of
+ * several possible states. If the FW in operational, waiting-for-handshake
+ * states, driver must take steps to bring it to ready state. Otherwise, it
+ * has to wait for the ready state.
+ */
+static int
+megasas_transition_to_ready(struct megasas_register_set __iomem * reg_set)
+{
+ int i;
+ u8 max_wait;
+ u32 fw_state;
+ u32 cur_state;
+
+ fw_state = readl(®_set->outbound_msg_0) & MFI_STATE_MASK;
+
+ while (fw_state != MFI_STATE_READY) {
+
+ printk(KERN_INFO "megasas: Waiting for FW to come to ready"
+ " state\n");
+ switch (fw_state) {
+
+ case MFI_STATE_FAULT:
+
+ printk(KERN_DEBUG "megasas: FW in FAULT state!!\n");
+ return -ENODEV;
+
+ case MFI_STATE_WAIT_HANDSHAKE:
+ /*
+ * Set the CLR bit in inbound doorbell
+ */
+ writel(MFI_INIT_CLEAR_HANDSHAKE,
+ ®_set->inbound_doorbell);
+
+ max_wait = 2;
+ cur_state = MFI_STATE_WAIT_HANDSHAKE;
+ break;
+
+ case MFI_STATE_OPERATIONAL:
+ /*
+ * Bring it to READY state; assuming max wait 2 secs
+ */
+ megasas_disable_intr(reg_set);
+ writel(MFI_INIT_READY, ®_set->inbound_doorbell);
+
+ max_wait = 10;
+ cur_state = MFI_STATE_OPERATIONAL;
+ break;
+
+ case MFI_STATE_UNDEFINED:
+ /*
+ * This state should not last for more than 2 seconds
+ */
+ max_wait = 2;
+ cur_state = MFI_STATE_UNDEFINED;
+ break;
+
+ case MFI_STATE_BB_INIT:
+ max_wait = 2;
+ cur_state = MFI_STATE_BB_INIT;
+ break;
+
+ case MFI_STATE_FW_INIT:
+ max_wait = 20;
+ cur_state = MFI_STATE_FW_INIT;
+ break;
+
+ case MFI_STATE_FW_INIT_2:
+ max_wait = 20;
+ cur_state = MFI_STATE_FW_INIT_2;
+ break;
+
+ case MFI_STATE_DEVICE_SCAN:
+ max_wait = 20;
+ cur_state = MFI_STATE_DEVICE_SCAN;
+ break;
+
+ case MFI_STATE_FLUSH_CACHE:
+ max_wait = 20;
+ cur_state = MFI_STATE_FLUSH_CACHE;
+ break;
+
+ default:
+ printk(KERN_DEBUG "megasas: Unknown state 0x%x\n",
+ fw_state);
+ return -ENODEV;
+ }
+
+ /*
+ * The cur_state should not last for more than max_wait secs
+ */
+ for (i = 0; i < (max_wait * 1000); i++) {
+ fw_state = MFI_STATE_MASK &
+ readl(®_set->outbound_msg_0);
+
+ if (fw_state == cur_state) {
+ msleep(1);
+ } else
+ break;
+ }
+
+ /*
+ * Return error if fw_state hasn't changed after max_wait
+ */
+ if (fw_state == cur_state) {
+ printk(KERN_DEBUG "FW state [%d] hasn't changed "
+ "in %d secs\n", fw_state, max_wait);
+ return -ENODEV;
+ }
+ };
+
+ return 0;
+}
+
+/**
+ * megasas_teardown_frame_pool - Destroy the cmd frame DMA pool
+ * @instance: Adapter soft state
+ */
+static void megasas_teardown_frame_pool(struct megasas_instance *instance)
+{
+ int i;
+ u32 max_cmd = instance->max_fw_cmds;
+ struct megasas_cmd *cmd;
+
+ if (!instance->frame_dma_pool)
+ return;
+
+ /*
+ * Return all frames to pool
+ */
+ for (i = 0; i < max_cmd; i++) {
+
+ cmd = instance->cmd_list[i];
+
+ if (cmd->frame)
+ pci_pool_free(instance->frame_dma_pool, cmd->frame,
+ cmd->frame_phys_addr);
+
+ if (cmd->sense)
+ pci_pool_free(instance->sense_dma_pool, cmd->frame,
+ cmd->sense_phys_addr);
+ }
+
+ /*
+ * Now destroy the pool itself
+ */
+ pci_pool_destroy(instance->frame_dma_pool);
+ pci_pool_destroy(instance->sense_dma_pool);
+
+ instance->frame_dma_pool = NULL;
+ instance->sense_dma_pool = NULL;
+}
+
+/**
+ * megasas_create_frame_pool - Creates DMA pool for cmd frames
+ * @instance: Adapter soft state
+ *
+ * Each command packet has an embedded DMA memory buffer that is used for
+ * filling MFI frame and the SG list that immediately follows the frame. This
+ * function creates those DMA memory buffers for each command packet by using
+ * PCI pool facility.
+ */
+static int megasas_create_frame_pool(struct megasas_instance *instance)
+{
+ int i;
+ u32 max_cmd;
+ u32 sge_sz;
+ u32 sgl_sz;
+ u32 total_sz;
+ u32 frame_count;
+ struct megasas_cmd *cmd;
+
+ max_cmd = instance->max_fw_cmds;
+
+ /*
+ * Size of our frame is 64 bytes for MFI frame, followed by max SG
+ * elements and finally SCSI_SENSE_BUFFERSIZE bytes for sense buffer
+ */
+ sge_sz = (IS_DMA64) ? sizeof(struct megasas_sge64) :
+ sizeof(struct megasas_sge32);
+
+ /*
+ * Calculated the number of 64byte frames required for SGL
+ */
+ sgl_sz = sge_sz * instance->max_num_sge;
+ frame_count = (sgl_sz + MEGAMFI_FRAME_SIZE - 1) / MEGAMFI_FRAME_SIZE;
+
+ /*
+ * We need one extra frame for the MFI command
+ */
+ frame_count++;
+
+ total_sz = MEGAMFI_FRAME_SIZE * frame_count;
+ /*
+ * Use DMA pool facility provided by PCI layer
+ */
+ instance->frame_dma_pool = pci_pool_create("megasas frame pool",
+ instance->pdev, total_sz, 64,
+ 0);
+
+ if (!instance->frame_dma_pool) {
+ printk(KERN_DEBUG "megasas: failed to setup frame pool\n");
+ return -ENOMEM;
+ }
+
+ instance->sense_dma_pool = pci_pool_create("megasas sense pool",
+ instance->pdev, 128, 4, 0);
+
+ if (!instance->sense_dma_pool) {
+ printk(KERN_DEBUG "megasas: failed to setup sense pool\n");
+
+ pci_pool_destroy(instance->frame_dma_pool);
+ instance->frame_dma_pool = NULL;
+
+ return -ENOMEM;
+ }
+
+ /*
+ * Allocate and attach a frame to each of the commands in cmd_list.
+ * By making cmd->index as the context instead of the &cmd, we can
+ * always use 32bit context regardless of the architecture
+ */
+ for (i = 0; i < max_cmd; i++) {
+
+ cmd = instance->cmd_list[i];
+
+ cmd->frame = pci_pool_alloc(instance->frame_dma_pool,
+ GFP_KERNEL, &cmd->frame_phys_addr);
+
+ cmd->sense = pci_pool_alloc(instance->sense_dma_pool,
+ GFP_KERNEL, &cmd->sense_phys_addr);
+
+ /*
+ * megasas_teardown_frame_pool() takes care of freeing
+ * whatever has been allocated
+ */
+ if (!cmd->frame || !cmd->sense) {
+ printk(KERN_DEBUG "megasas: pci_pool_alloc failed \n");
+ megasas_teardown_frame_pool(instance);
+ return -ENOMEM;
+ }
+
+ cmd->frame->io.context = cmd->index;
+ }
+
+ return 0;
+}
+
+/**
+ * megasas_free_cmds - Free all the cmds in the free cmd pool
+ * @instance: Adapter soft state
+ */
+static void megasas_free_cmds(struct megasas_instance *instance)
+{
+ int i;
+ /* First free the MFI frame pool */
+ megasas_teardown_frame_pool(instance);
+
+ /* Free all the commands in the cmd_list */
+ for (i = 0; i < instance->max_fw_cmds; i++)
+ kfree(instance->cmd_list[i]);
+
+ /* Free the cmd_list buffer itself */
+ kfree(instance->cmd_list);
+ instance->cmd_list = NULL;
+
+ INIT_LIST_HEAD(&instance->cmd_pool);
+}
+
+/**
+ * megasas_alloc_cmds - Allocates the command packets
+ * @instance: Adapter soft state
+ *
+ * Each command that is issued to the FW, whether IO commands from the OS or
+ * internal commands like IOCTLs, are wrapped in local data structure called
+ * megasas_cmd. The frame embedded in this megasas_cmd is actually issued to
+ * the FW.
+ *
+ * Each frame has a 32-bit field called context (tag). This context is used
+ * to get back the megasas_cmd from the frame when a frame gets completed in
+ * the ISR. Typically the address of the megasas_cmd itself would be used as
+ * the context. But we wanted to keep the differences between 32 and 64 bit
+ * systems to the mininum. We always use 32 bit integers for the context. 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 given the context. The
+ * free commands themselves are maintained in a linked list called cmd_pool.
+ */
+static int megasas_alloc_cmds(struct megasas_instance *instance)
+{
+ int i;
+ int j;
+ u32 max_cmd;
+ struct megasas_cmd *cmd;
+
+ max_cmd = instance->max_fw_cmds;
+
+ /*
+ * instance->cmd_list is an array of struct megasas_cmd pointers.
+ * Allocate the dynamic array first and then allocate individual
+ * commands.
+ */
+ instance->cmd_list = kmalloc(sizeof(struct megasas_cmd *) * max_cmd,
+ GFP_KERNEL);
+
+ if (!instance->cmd_list) {
+ printk(KERN_DEBUG "megasas: out of memory\n");
+ return -ENOMEM;
+ }
+
+ memset(instance->cmd_list, 0, sizeof(struct megasas_cmd *) * max_cmd);
+
+ for (i = 0; i < max_cmd; i++) {
+ instance->cmd_list[i] = kmalloc(sizeof(struct megasas_cmd),
+ GFP_KERNEL);
+
+ if (!instance->cmd_list[i]) {
+
+ for (j = 0; j < i; j++)
+ kfree(instance->cmd_list[j]);
+
+ kfree(instance->cmd_list);
+ instance->cmd_list = NULL;
+
+ return -ENOMEM;
+ }
+ }
+
+ /*
+ * Add all the commands to command pool (instance->cmd_pool)
+ */
+ for (i = 0; i < max_cmd; i++) {
+ cmd = instance->cmd_list[i];
+ memset(cmd, 0, sizeof(struct megasas_cmd));
+ cmd->index = i;
+ cmd->instance = instance;
+
+ list_add_tail(&cmd->list, &instance->cmd_pool);
+ }
+
+ /*
+ * Create a frame pool and assign one frame to each cmd
+ */
+ if (megasas_create_frame_pool(instance)) {
+ printk(KERN_DEBUG "megasas: Error creating frame DMA pool\n");
+ megasas_free_cmds(instance);
+ }
+
+ return 0;
+}
+
+/**
+ * megasas_get_controller_info - Returns FW's controller structure
+ * @instance: Adapter soft state
+ * @ctrl_info: Controller information structure
+ *
+ * Issues an internal command (DCMD) to get the FW's controller structure.
+ * This information is mainly used to find out the maximum IO transfer per
+ * command supported by the FW.
+ */
+static int
+megasas_get_ctrl_info(struct megasas_instance *instance,
+ struct megasas_ctrl_info *ctrl_info)
+{
+ int ret = 0;
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+ struct megasas_ctrl_info *ci;
+ dma_addr_t ci_h = 0;
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ printk(KERN_DEBUG "megasas: Failed to get a free cmd\n");
+ return -ENOMEM;
+ }
+
+ dcmd = &cmd->frame->dcmd;
+
+ ci = pci_alloc_consistent(instance->pdev,
+ sizeof(struct megasas_ctrl_info), &ci_h);
+
+ if (!ci) {
+ printk(KERN_DEBUG "Failed to alloc mem for ctrl info\n");
+ megasas_return_cmd(instance, cmd);
+ return -ENOMEM;
+ }
+
+ memset(ci, 0, sizeof(*ci));
+ memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+ dcmd->cmd = MFI_CMD_DCMD;
+ dcmd->cmd_status = 0xFF;
+ dcmd->sge_count = 1;
+ dcmd->flags = MFI_FRAME_DIR_READ;
+ dcmd->timeout = 0;
+ dcmd->data_xfer_len = sizeof(struct megasas_ctrl_info);
+ dcmd->opcode = MR_DCMD_CTRL_GET_INFO;
+ dcmd->sgl.sge32[0].phys_addr = ci_h;
+ dcmd->sgl.sge32[0].length = sizeof(struct megasas_ctrl_info);
+
+ if (!megasas_issue_polled(instance, cmd)) {
+ ret = 0;
+ memcpy(ctrl_info, ci, sizeof(struct megasas_ctrl_info));
+ } else {
+ ret = -1;
+ }
+
+ pci_free_consistent(instance->pdev, sizeof(struct megasas_ctrl_info),
+ ci, ci_h);
+
+ megasas_return_cmd(instance, cmd);
+ return ret;
+}
+
+/**
+ * megasas_init_mfi - Initializes the FW
+ * @instance: Adapter soft state
+ *
+ * This is the main function for initializing MFI firmware.
+ */
+static int megasas_init_mfi(struct megasas_instance *instance)
+{
+ u32 context_sz;
+ u32 reply_q_sz;
+ u32 max_sectors_1;
+ u32 max_sectors_2;
+ struct megasas_register_set __iomem *reg_set;
+
+ struct megasas_cmd *cmd;
+ struct megasas_ctrl_info *ctrl_info;
+
+ struct megasas_init_frame *init_frame;
+ struct megasas_init_queue_info *initq_info;
+ dma_addr_t init_frame_h;
+ dma_addr_t initq_info_h;
+
+ /*
+ * Map the message registers
+ */
+ instance->base_addr = pci_resource_start(instance->pdev, 0);
+
+ if (pci_request_regions(instance->pdev, "megasas: LSI Logic")) {
+ printk(KERN_DEBUG "megasas: IO memory region busy!\n");
+ return -EBUSY;
+ }
+
+ instance->reg_set = ioremap_nocache(instance->base_addr, 8192);
+
+ if (!instance->reg_set) {
+ printk(KERN_DEBUG "megasas: Failed to map IO mem\n");
+ goto fail_ioremap;
+ }
+
+ reg_set = instance->reg_set;
+
+ /*
+ * We expect the FW state to be READY
+ */
+ if (megasas_transition_to_ready(instance->reg_set))
+ goto fail_ready_state;
+
+ /*
+ * Get various operational parameters from status register
+ */
+ instance->max_fw_cmds = readl(®_set->outbound_msg_0) & 0x00FFFF;
+ instance->max_num_sge = (readl(®_set->outbound_msg_0) & 0xFF0000) >>
+ 0x10;
+ /*
+ * Create a pool of commands
+ */
+ if (megasas_alloc_cmds(instance))
+ goto fail_alloc_cmds;
+
+ /*
+ * Allocate memory for reply queue. Length of reply queue should
+ * be _one_ more than the maximum commands handled by the firmware.
+ *
+ * Note: When FW completes commands, it places corresponding contex
+ * values in this circular reply queue. This circular queue is a fairly
+ * typical producer-consumer queue. FW is the producer (of completed
+ * commands) and the driver is the consumer.
+ */
+ context_sz = sizeof(u32);
+ reply_q_sz = context_sz * (instance->max_fw_cmds + 1);
+
+ instance->reply_queue = pci_alloc_consistent(instance->pdev,
+ reply_q_sz,
+ &instance->reply_queue_h);
+
+ if (!instance->reply_queue) {
+ printk(KERN_DEBUG "megasas: Out of DMA mem for reply queue\n");
+ goto fail_reply_queue;
+ }
+
+ /*
+ * Prepare a init frame. Note the init frame points to queue info
+ * structure. Each frame has SGL allocated after first 64 bytes. For
+ * this frame - since we don't need any SGL - we use SGL's space as
+ * queue info structure
+ *
+ * We will not get a NULL command below. We just created the pool.
+ */
+ cmd = megasas_get_cmd(instance);
+
+ init_frame = (struct megasas_init_frame *)cmd->frame;
+ initq_info = (struct megasas_init_queue_info *)
+ ((unsigned long)init_frame + 64);
+
+ init_frame_h = cmd->frame_phys_addr;
+ initq_info_h = init_frame_h + 64;
+
+ memset(init_frame, 0, MEGAMFI_FRAME_SIZE);
+ memset(initq_info, 0, sizeof(struct megasas_init_queue_info));
+
+ initq_info->reply_queue_entries = instance->max_fw_cmds + 1;
+ initq_info->reply_queue_start_phys_addr_lo = instance->reply_queue_h;
+
+ initq_info->producer_index_phys_addr_lo = instance->producer_h;
+ initq_info->consumer_index_phys_addr_lo = instance->consumer_h;
+
+ init_frame->cmd = MFI_CMD_INIT;
+ init_frame->cmd_status = 0xFF;
+ init_frame->queue_info_new_phys_addr_lo = initq_info_h;
+
+ init_frame->data_xfer_len = sizeof(struct megasas_init_queue_info);
+
+ /*
+ * Issue the init frame in polled mode
+ */
+ if (megasas_issue_polled(instance, cmd)) {
+ printk(KERN_DEBUG "megasas: Failed to init firmware\n");
+ goto fail_fw_init;
+ }
+
+ megasas_return_cmd(instance, cmd);
+
+ ctrl_info = kmalloc(sizeof(struct megasas_ctrl_info), GFP_KERNEL);
+
+ /*
+ * Compute the max allowed sectors per IO: The controller info has two
+ * limits on max sectors. Driver should use the minimum of these two.
+ *
+ * 1 << stripe_sz_ops.min = max sectors per strip
+ *
+ * Note that older firmwares ( < FW ver 30) didn't report information
+ * to calculate max_sectors_1. So the number ended up as zero always.
+ */
+ if (ctrl_info && !megasas_get_ctrl_info(instance, ctrl_info)) {
+
+ max_sectors_1 = (1 << ctrl_info->stripe_sz_ops.min) *
+ ctrl_info->max_strips_per_io;
+ max_sectors_2 = ctrl_info->max_request_size;
+
+ instance->max_sectors_per_req = (max_sectors_1 < max_sectors_2)
+ ? max_sectors_1 : max_sectors_2;
+ } else
+ instance->max_sectors_per_req = instance->max_num_sge *
+ PAGE_SIZE / 512;
+
+ kfree(ctrl_info);
+
+ return 0;
+
+ fail_fw_init:
+ megasas_return_cmd(instance, cmd);
+
+ pci_free_consistent(instance->pdev, reply_q_sz,
+ instance->reply_queue, instance->reply_queue_h);
+ fail_reply_queue:
+ megasas_free_cmds(instance);
+
+ fail_alloc_cmds:
+ fail_ready_state:
+ iounmap(instance->reg_set);
+
+ fail_ioremap:
+ pci_release_regions(instance->pdev);
+
+ return -EINVAL;
+}
+
+/**
+ * megasas_release_mfi - Reverses the FW initialization
+ * @intance: Adapter soft state
+ */
+static void megasas_release_mfi(struct megasas_instance *instance)
+{
+ u32 reply_q_sz = sizeof(u32) * (instance->max_fw_cmds + 1);
+
+ pci_free_consistent(instance->pdev, reply_q_sz,
+ instance->reply_queue, instance->reply_queue_h);
+
+ megasas_free_cmds(instance);
+
+ iounmap(instance->reg_set);
+
+ pci_release_regions(instance->pdev);
+}
+
+/**
+ * megasas_get_seq_num - Gets latest event sequence numbers
+ * @instance: Adapter soft state
+ * @eli: FW event log sequence numbers information
+ *
+ * FW maintains a log of all events in a non-volatile area. Upper layers would
+ * usually find out the latest sequence number of the events, the seq number at
+ * the boot etc. They would "read" all the events below the latest seq number
+ * by issuing a direct fw cmd (DCMD). For the future events (beyond latest seq
+ * number), they would subsribe to AEN (asynchronous event notification) and
+ * wait for the events to happen.
+ */
+static int
+megasas_get_seq_num(struct megasas_instance *instance,
+ struct megasas_evt_log_info *eli)
+{
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+ struct megasas_evt_log_info *el_info;
+ dma_addr_t el_info_h = 0;
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd) {
+ return -ENOMEM;
+ }
+
+ dcmd = &cmd->frame->dcmd;
+ el_info = pci_alloc_consistent(instance->pdev,
+ sizeof(struct megasas_evt_log_info),
+ &el_info_h);
+
+ if (!el_info) {
+ megasas_return_cmd(instance, cmd);
+ return -ENOMEM;
+ }
+
+ memset(el_info, 0, sizeof(*el_info));
+ memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+ dcmd->cmd = MFI_CMD_DCMD;
+ dcmd->cmd_status = 0x0;
+ dcmd->sge_count = 1;
+ dcmd->flags = MFI_FRAME_DIR_READ;
+ dcmd->timeout = 0;
+ dcmd->data_xfer_len = sizeof(struct megasas_evt_log_info);
+ dcmd->opcode = MR_DCMD_CTRL_EVENT_GET_INFO;
+ dcmd->sgl.sge32[0].phys_addr = el_info_h;
+ dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_log_info);
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ /*
+ * Copy the data back into callers buffer
+ */
+ memcpy(eli, el_info, sizeof(struct megasas_evt_log_info));
+
+ pci_free_consistent(instance->pdev, sizeof(struct megasas_evt_log_info),
+ el_info, el_info_h);
+
+ megasas_return_cmd(instance, cmd);
+
+ return 0;
+}
+
+/**
+ * megasas_register_aen - Registers for asynchronous event notification
+ * @instance: Adapter soft state
+ * @seq_num: The starting sequence number
+ * @class_locale: Class of the event
+ *
+ * This function subscribes for AEN for events beyond the @seq_num. It requests
+ * to be notified if and only if the event is of type @class_locale
+ */
+static int
+megasas_register_aen(struct megasas_instance *instance, u32 seq_num,
+ u32 class_locale_word)
+{
+ int ret_val;
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+ union megasas_evt_class_locale curr_aen;
+ union megasas_evt_class_locale prev_aen;
+
+ /*
+ * If there an AEN pending already (aen_cmd), check if the
+ * class_locale of that pending AEN is inclusive of the new
+ * AEN request we currently have. If it is, then we don't have
+ * to do anything. In other words, whichever events the current
+ * AEN request is subscribing to, have already been subscribed
+ * to.
+ *
+ * If the old_cmd is _not_ inclusive, then we have to abort
+ * that command, form a class_locale that is superset of both
+ * old and current and re-issue to the FW
+ */
+
+ curr_aen.word = class_locale_word;
+
+ if (instance->aen_cmd) {
+
+ prev_aen.word = instance->aen_cmd->frame->dcmd.mbox.w[1];
+
+ /*
+ * A class whose enum value is smaller is inclusive of all
+ * higher values. If a PROGRESS (= -1) was previously
+ * registered, then a new registration requests for higher
+ * classes need not be sent to FW. They are automatically
+ * included.
+ *
+ * Locale numbers don't have such hierarchy. They are bitmap
+ * values
+ */
+ if ((prev_aen.members.class <= curr_aen.members.class) &&
+ !((prev_aen.members.locale & curr_aen.members.locale) ^
+ curr_aen.members.locale)) {
+ /*
+ * Previously issued event registration includes
+ * current request. Nothing to do.
+ */
+ return 0;
+ } else {
+ curr_aen.members.locale |= prev_aen.members.locale;
+
+ if (prev_aen.members.class < curr_aen.members.class)
+ curr_aen.members.class = prev_aen.members.class;
+
+ instance->aen_cmd->abort_aen = 1;
+ ret_val = megasas_issue_blocked_abort_cmd(instance,
+ instance->
+ aen_cmd);
+
+ if (ret_val) {
+ printk(KERN_DEBUG "megasas: Failed to abort "
+ "previous AEN command\n");
+ return ret_val;
+ }
+ }
+ }
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd)
+ return -ENOMEM;
+
+ dcmd = &cmd->frame->dcmd;
+
+ memset(instance->evt_detail, 0, sizeof(struct megasas_evt_detail));
+
+ /*
+ * Prepare DCMD for aen registration
+ */
+ memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+ dcmd->cmd = MFI_CMD_DCMD;
+ dcmd->cmd_status = 0x0;
+ dcmd->sge_count = 1;
+ dcmd->flags = MFI_FRAME_DIR_READ;
+ dcmd->timeout = 0;
+ dcmd->data_xfer_len = sizeof(struct megasas_evt_detail);
+ dcmd->opcode = MR_DCMD_CTRL_EVENT_WAIT;
+ dcmd->mbox.w[0] = seq_num;
+ dcmd->mbox.w[1] = curr_aen.word;
+ dcmd->sgl.sge32[0].phys_addr = (u32) instance->evt_detail_h;
+ dcmd->sgl.sge32[0].length = sizeof(struct megasas_evt_detail);
+
+ /*
+ * Store reference to the cmd used to register for AEN. When an
+ * application wants us to register for AEN, we have to abort this
+ * cmd and re-register with a new EVENT LOCALE supplied by that app
+ */
+ instance->aen_cmd = cmd;
+
+ /*
+ * Issue the aen registration frame
+ */
+ writel(cmd->frame_phys_addr >> 3,
+ &instance->reg_set->inbound_queue_port);
+
+ return 0;
+}
+
+/**
+ * megasas_start_aen - Subscribes to AEN during driver load time
+ * @instance: Adapter soft state
+ */
+static int megasas_start_aen(struct megasas_instance *instance)
+{
+ struct megasas_evt_log_info eli;
+ union megasas_evt_class_locale class_locale;
+
+ /*
+ * Get the latest sequence number from FW
+ */
+ memset(&eli, 0, sizeof(eli));
+
+ if (megasas_get_seq_num(instance, &eli))
+ return -1;
+
+ /*
+ * Register AEN with FW for latest sequence number plus 1
+ */
+ class_locale.members.reserved = 0;
+ class_locale.members.locale = MR_EVT_LOCALE_ALL;
+ class_locale.members.class = MR_EVT_CLASS_DEBUG;
+
+ return megasas_register_aen(instance, eli.newest_seq_num + 1,
+ class_locale.word);
+}
+
+/**
+ * megasas_io_attach - Attaches this driver to SCSI mid-layer
+ * @instance: Adapter soft state
+ */
+static int megasas_io_attach(struct megasas_instance *instance)
+{
+ struct Scsi_Host *host = instance->host;
+
+ /*
+ * Export parameters required by SCSI mid-layer
+ */
+ host->irq = instance->pdev->irq;
+ host->unique_id = instance->unique_id;
+ host->can_queue = instance->max_fw_cmds - MEGASAS_INT_CMDS;
+ host->this_id = instance->init_id;
+ host->sg_tablesize = instance->max_num_sge;
+ host->max_sectors = instance->max_sectors_per_req;
+ host->cmd_per_lun = 128;
+ host->max_channel = MEGASAS_MAX_CHANNELS - 1;
+ host->max_id = MEGASAS_MAX_DEV_PER_CHANNEL;
+ host->max_lun = MEGASAS_MAX_LUN;
+
+ /*
+ * Notify the mid-layer about the new controller
+ */
+ if (scsi_add_host(host, &instance->pdev->dev)) {
+ printk(KERN_DEBUG "megasas: scsi_add_host failed\n");
+ return -ENODEV;
+ }
+
+ /*
+ * Trigger SCSI to scan our drives
+ */
+ scsi_scan_host(host);
+ return 0;
+}
+
+/**
+ * megasas_probe_one - PCI hotplug entry point
+ * @pdev: PCI device structure
+ * @id: PCI ids of supported hotplugged adapter
+ */
+static int __devinit
+megasas_probe_one(struct pci_dev *pdev, const struct pci_device_id *id)
+{
+ int rval;
+ struct Scsi_Host *host;
+ struct megasas_instance *instance;
+
+ /*
+ * Announce PCI information
+ */
+ printk(KERN_INFO "megasas: %#4.04x:%#4.04x:%#4.04x:%#4.04x: ",
+ pdev->vendor, pdev->device, pdev->subsystem_vendor,
+ pdev->subsystem_device);
+
+ printk("bus %d:slot %d:func %d\n",
+ pdev->bus->number, PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn));
+
+ /*
+ * PCI prepping: enable device set bus mastering and dma mask
+ */
+ rval = pci_enable_device(pdev);
+
+ if (rval) {
+ return rval;
+ }
+
+ pci_set_master(pdev);
+
+ /*
+ * All our contollers are capable of performing 64-bit DMA
+ */
+ if (IS_DMA64) {
+ if (pci_set_dma_mask(pdev, DMA_64BIT_MASK) != 0) {
+
+ if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
+ goto fail_set_dma_mask;
+ }
+ } else {
+ if (pci_set_dma_mask(pdev, DMA_32BIT_MASK) != 0)
+ goto fail_set_dma_mask;
+ }
+
+ host = scsi_host_alloc(&megasas_template,
+ sizeof(struct megasas_instance));
+
+ if (!host) {
+ printk(KERN_DEBUG "megasas: scsi_host_alloc failed\n");
+ goto fail_alloc_instance;
+ }
+
+ instance = (struct megasas_instance *)host->hostdata;
+ memset(instance, 0, sizeof(*instance));
+
+ instance->producer = pci_alloc_consistent(pdev, sizeof(u32),
+ &instance->producer_h);
+ instance->consumer = pci_alloc_consistent(pdev, sizeof(u32),
+ &instance->consumer_h);
+
+ if (!instance->producer || !instance->consumer) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory for "
+ "producer, consumer\n");
+ goto fail_alloc_dma_buf;
+ }
+
+ *instance->producer = 0;
+ *instance->consumer = 0;
+
+ instance->evt_detail = pci_alloc_consistent(pdev,
+ sizeof(struct
+ megasas_evt_detail),
+ &instance->evt_detail_h);
+
+ if (!instance->evt_detail) {
+ printk(KERN_DEBUG "megasas: Failed to allocate memory for "
+ "event detail structure\n");
+ goto fail_alloc_dma_buf;
+ }
+
+ /*
+ * Initialize locks and queues
+ */
+ INIT_LIST_HEAD(&instance->cmd_pool);
+
+ init_waitqueue_head(&instance->int_cmd_wait_q);
+ init_waitqueue_head(&instance->abort_cmd_wait_q);
+
+ spin_lock_init(&instance->cmd_pool_lock);
+ spin_lock_init(&instance->instance_lock);
+
+ sema_init(&instance->aen_mutex, 1);
+ sema_init(&instance->ioctl_sem, MEGASAS_INT_CMDS);
+
+ /*
+ * Initialize PCI related and misc parameters
+ */
+ instance->pdev = pdev;
+ instance->host = host;
+ instance->unique_id = pdev->bus->number << 8 | pdev->devfn;
+ instance->init_id = MEGASAS_DEFAULT_INIT_ID;
+
+ /*
+ * Initialize MFI Firmware
+ */
+ if (megasas_init_mfi(instance))
+ goto fail_init_mfi;
+
+ /*
+ * Register IRQ
+ */
+ if (request_irq(pdev->irq, megasas_isr, SA_SHIRQ, "megasas", instance)) {
+ printk(KERN_DEBUG "megasas: Failed to register IRQ\n");
+ goto fail_irq;
+ }
+
+ megasas_enable_intr(instance->reg_set);
+
+ /*
+ * Store instance in PCI softstate
+ */
+ pci_set_drvdata(pdev, instance);
+
+ /*
+ * Add this controller to megasas_mgmt_info structure so that it
+ * can be exported to management applications
+ */
+ megasas_mgmt_info.count++;
+ megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = instance;
+ megasas_mgmt_info.max_index++;
+
+ /*
+ * Initiate AEN (Asynchronous Event Notification)
+ */
+ if (megasas_start_aen(instance)) {
+ printk(KERN_DEBUG "megasas: start aen failed\n");
+ goto fail_start_aen;
+ }
+
+ /*
+ * Register with SCSI mid-layer
+ */
+ if (megasas_io_attach(instance))
+ goto fail_io_attach;
+
+ return 0;
+
+ fail_start_aen:
+ fail_io_attach:
+ megasas_mgmt_info.count--;
+ megasas_mgmt_info.instance[megasas_mgmt_info.max_index] = NULL;
+ megasas_mgmt_info.max_index--;
+
+ pci_set_drvdata(pdev, NULL);
+ megasas_disable_intr(instance->reg_set);
+ free_irq(instance->pdev->irq, instance);
+
+ megasas_release_mfi(instance);
+
+ fail_irq:
+ fail_init_mfi:
+ fail_alloc_dma_buf:
+ if (instance->evt_detail)
+ pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
+ instance->evt_detail,
+ instance->evt_detail_h);
+
+ if (instance->producer)
+ pci_free_consistent(pdev, sizeof(u32), instance->producer,
+ instance->producer_h);
+ if (instance->consumer)
+ pci_free_consistent(pdev, sizeof(u32), instance->consumer,
+ instance->consumer_h);
+ scsi_host_put(host);
+
+ fail_alloc_instance:
+ fail_set_dma_mask:
+ pci_disable_device(pdev);
+
+ return -ENODEV;
+}
+
+/**
+ * megasas_flush_cache - Requests FW to flush all its caches
+ * @instance: Adapter soft state
+ */
+static void megasas_flush_cache(struct megasas_instance *instance)
+{
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd)
+ return;
+
+ dcmd = &cmd->frame->dcmd;
+
+ memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+ dcmd->cmd = MFI_CMD_DCMD;
+ dcmd->cmd_status = 0x0;
+ dcmd->sge_count = 0;
+ dcmd->flags = MFI_FRAME_DIR_NONE;
+ dcmd->timeout = 0;
+ dcmd->data_xfer_len = 0;
+ dcmd->opcode = MR_DCMD_CTRL_CACHE_FLUSH;
+ dcmd->mbox.b[0] = MR_FLUSH_CTRL_CACHE | MR_FLUSH_DISK_CACHE;
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ megasas_return_cmd(instance, cmd);
+
+ return;
+}
+
+/**
+ * megasas_shutdown_controller - Instructs FW to shutdown the controller
+ * @instance: Adapter soft state
+ */
+static void megasas_shutdown_controller(struct megasas_instance *instance)
+{
+ struct megasas_cmd *cmd;
+ struct megasas_dcmd_frame *dcmd;
+
+ cmd = megasas_get_cmd(instance);
+
+ if (!cmd)
+ return;
+
+ if (instance->aen_cmd)
+ megasas_issue_blocked_abort_cmd(instance, instance->aen_cmd);
+
+ dcmd = &cmd->frame->dcmd;
+
+ memset(dcmd->mbox.b, 0, MFI_MBOX_SIZE);
+
+ dcmd->cmd = MFI_CMD_DCMD;
+ dcmd->cmd_status = 0x0;
+ dcmd->sge_count = 0;
+ dcmd->flags = MFI_FRAME_DIR_NONE;
+ dcmd->timeout = 0;
+ dcmd->data_xfer_len = 0;
+ dcmd->opcode = MR_DCMD_CTRL_SHUTDOWN;
+
+ megasas_issue_blocked_cmd(instance, cmd);
+
+ megasas_return_cmd(instance, cmd);
+
+ return;
+}
+
+/**
+ * megasas_detach_one - PCI hot"un"plug entry point
+ * @pdev: PCI device structure
+ */
+static void megasas_detach_one(struct pci_dev *pdev)
+{
+ int i;
+ struct Scsi_Host *host;
+ struct megasas_instance *instance;
+
+ instance = pci_get_drvdata(pdev);
+ host = instance->host;
+
+ scsi_remove_host(instance->host);
+ megasas_flush_cache(instance);
+ megasas_shutdown_controller(instance);
+
+ /*
+ * Take the instance off the instance array. Note that we will not
+ * decrement the max_index. We let this array be sparse array
+ */
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+ if (megasas_mgmt_info.instance[i] == instance) {
+ megasas_mgmt_info.count--;
+ megasas_mgmt_info.instance[i] = NULL;
+
+ break;
+ }
+ }
+
+ pci_set_drvdata(instance->pdev, NULL);
+
+ megasas_disable_intr(instance->reg_set);
+
+ free_irq(instance->pdev->irq, instance);
+
+ megasas_release_mfi(instance);
+
+ pci_free_consistent(pdev, sizeof(struct megasas_evt_detail),
+ instance->evt_detail, instance->evt_detail_h);
+
+ pci_free_consistent(pdev, sizeof(u32), instance->producer,
+ instance->producer_h);
+
+ pci_free_consistent(pdev, sizeof(u32), instance->consumer,
+ instance->consumer_h);
+
+ scsi_host_put(host);
+
+ pci_set_drvdata(pdev, NULL);
+
+ pci_disable_device(pdev);
+
+ return;
+}
+
+/**
+ * megasas_shutdown - Shutdown entry point
+ * @device: Generic device structure
+ */
+static void megasas_shutdown(struct pci_dev *pdev)
+{
+ struct megasas_instance *instance = pci_get_drvdata(pdev);
+ megasas_flush_cache(instance);
+}
+
+/**
+ * megasas_mgmt_open - char node "open" entry point
+ */
+static int megasas_mgmt_open(struct inode *inode, struct file *filep)
+{
+ /*
+ * Allow only those users with admin rights
+ */
+ if (!capable(CAP_SYS_ADMIN))
+ return -EACCES;
+
+ return 0;
+}
+
+/**
+ * megasas_mgmt_release - char node "release" entry point
+ */
+static int megasas_mgmt_release(struct inode *inode, struct file *filep)
+{
+ filep->private_data = NULL;
+ fasync_helper(-1, filep, 0, &megasas_async_queue);
+
+ return 0;
+}
+
+/**
+ * megasas_mgmt_fasync - Async notifier registration from applications
+ *
+ * This function adds the calling process to a driver global queue. When an
+ * event occurs, SIGIO will be sent to all processes in this queue.
+ */
+static int megasas_mgmt_fasync(int fd, struct file *filep, int mode)
+{
+ int rc;
+
+ down(&megasas_async_queue_mutex);
+
+ rc = fasync_helper(fd, filep, mode, &megasas_async_queue);
+
+ up(&megasas_async_queue_mutex);
+
+ if (rc >= 0) {
+ /* For sanity check when we get ioctl */
+ filep->private_data = filep;
+ return 0;
+ }
+
+ printk(KERN_DEBUG "megasas: fasync_helper failed [%d]\n", rc);
+
+ return rc;
+}
+
+/**
+ * megasas_mgmt_fw_ioctl - Issues management ioctls to FW
+ * @instance: Adapter soft state
+ * @argp: User's ioctl packet
+ */
+static int
+megasas_mgmt_fw_ioctl(struct megasas_instance *instance,
+ struct megasas_iocpacket __user * user_ioc,
+ struct megasas_iocpacket *ioc)
+{
+ struct megasas_sge32 *kern_sge32;
+ struct megasas_cmd *cmd;
+ void *kbuff_arr[MAX_IOCTL_SGE];
+ dma_addr_t buf_handle = 0;
+ int error = 0, i;
+ void *sense = NULL;
+ dma_addr_t sense_handle;
+ u32 *sense_ptr;
+
+ memset(kbuff_arr, 0, sizeof(kbuff_arr));
+
+ if (ioc->sge_count > MAX_IOCTL_SGE) {
+ printk(KERN_DEBUG "megasas: SGE count [%d] > max limit [%d]\n",
+ ioc->sge_count, MAX_IOCTL_SGE);
+ return -EINVAL;
+ }
+
+ cmd = megasas_get_cmd(instance);
+ if (!cmd) {
+ printk(KERN_DEBUG "megasas: Failed to get a cmd packet\n");
+ return -ENOMEM;
+ }
+
+ /*
+ * User's IOCTL packet has 2 frames (maximum). Copy those two
+ * frames into our cmd's frames. cmd->frame's context will get
+ * overwritten when we copy from user's frames. So set that value
+ * alone separately
+ */
+ memcpy(cmd->frame, ioc->frame.raw, 2 * MEGAMFI_FRAME_SIZE);
+ cmd->frame->hdr.context = cmd->index;
+
+ /*
+ * The management interface between applications and the fw uses
+ * MFI frames. E.g, RAID configuration changes, LD property changes
+ * etc are accomplishes through different kinds of MFI frames. The
+ * driver needs to care only about substituting user buffers with
+ * kernel buffers in SGLs. The location of SGL is embedded in the
+ * struct iocpacket itself.
+ */
+ kern_sge32 = (struct megasas_sge32 *)
+ ((unsigned long)cmd->frame + ioc->sgl_off);
+
+ /*
+ * For each user buffer, create a mirror buffer and copy in
+ */
+ for (i = 0; i < ioc->sge_count; i++) {
+ kbuff_arr[i] = pci_alloc_consistent(instance->pdev,
+ ioc->sgl[i].iov_len,
+ &buf_handle);
+ if (!kbuff_arr[i]) {
+ printk(KERN_DEBUG "megasas: Failed to alloc "
+ "kernel SGL buffer for IOCTL \n");
+ error = -ENOMEM;
+ goto out;
+ }
+
+ /*
+ * We don't change the dma_coherent_mask, so
+ * pci_alloc_consistent only returns 32bit addresses
+ */
+ kern_sge32[i].phys_addr = (u32) buf_handle;
+ kern_sge32[i].length = ioc->sgl[i].iov_len;
+
+ /*
+ * We created a kernel buffer corresponding to the
+ * user buffer. Now copy in from the user buffer
+ */
+ if (copy_from_user(kbuff_arr[i], ioc->sgl[i].iov_base,
+ (u32) (ioc->sgl[i].iov_len))) {
+ error = -EFAULT;
+ goto out;
+ }
+ }
+
+ if (ioc->sense_len) {
+ sense = pci_alloc_consistent(instance->pdev, ioc->sense_len,
+ &sense_handle);
+ if (!sense) {
+ error = -ENOMEM;
+ goto out;
+ }
+
+ sense_ptr =
+ (u32 *) ((unsigned long)cmd->frame + ioc->sense_off);
+ *sense_ptr = sense_handle;
+ }
+
+ /*
+ * Set the sync_cmd flag so that the ISR knows not to complete this
+ * cmd to the SCSI mid-layer
+ */
+ cmd->sync_cmd = 1;
+ megasas_issue_blocked_cmd(instance, cmd);
+ cmd->sync_cmd = 0;
+
+ /*
+ * copy out the kernel buffers to user buffers
+ */
+ for (i = 0; i < ioc->sge_count; i++) {
+ if (copy_to_user(ioc->sgl[i].iov_base, kbuff_arr[i],
+ ioc->sgl[i].iov_len)) {
+ error = -EFAULT;
+ goto out;
+ }
+ }
+
+ /*
+ * copy out the sense
+ */
+ if (ioc->sense_len) {
+ /*
+ * sense_ptr points to the location that has the user
+ * sense buffer address
+ */
+ sense_ptr = (u32 *) ((unsigned long)ioc->frame.raw +
+ ioc->sense_off);
+
+ if (copy_to_user((void __user *)((unsigned long)(*sense_ptr)),
+ sense, ioc->sense_len)) {
+ error = -EFAULT;
+ goto out;
+ }
+ }
+
+ /*
+ * copy the status codes returned by the fw
+ */
+ if (copy_to_user(&user_ioc->frame.hdr.cmd_status,
+ &cmd->frame->hdr.cmd_status, sizeof(u8))) {
+ printk(KERN_DEBUG "megasas: Error copying out cmd_status\n");
+ error = -EFAULT;
+ }
+
+ out:
+ if (sense) {
+ pci_free_consistent(instance->pdev, ioc->sense_len,
+ sense, sense_handle);
+ }
+
+ for (i = 0; i < ioc->sge_count && kbuff_arr[i]; i++) {
+ pci_free_consistent(instance->pdev,
+ kern_sge32[i].length,
+ kbuff_arr[i], kern_sge32[i].phys_addr);
+ }
+
+ megasas_return_cmd(instance, cmd);
+ return error;
+}
+
+static struct megasas_instance *megasas_lookup_instance(u16 host_no)
+{
+ int i;
+
+ for (i = 0; i < megasas_mgmt_info.max_index; i++) {
+
+ if ((megasas_mgmt_info.instance[i]) &&
+ (megasas_mgmt_info.instance[i]->host->host_no == host_no))
+ return megasas_mgmt_info.instance[i];
+ }
+
+ return NULL;
+}
+
+static int megasas_mgmt_ioctl_fw(struct file *file, unsigned long arg)
+{
+ struct megasas_iocpacket __user *user_ioc =
+ (struct megasas_iocpacket __user *)arg;
+ struct megasas_iocpacket *ioc;
+ struct megasas_instance *instance;
+ int error;
+
+ ioc = kmalloc(sizeof(*ioc), GFP_KERNEL);
+ if (!ioc)
+ return -ENOMEM;
+
+ if (copy_from_user(ioc, user_ioc, sizeof(*ioc))) {
+ error = -EFAULT;
+ goto out_kfree_ioc;
+ }
+
+ instance = megasas_lookup_instance(ioc->host_no);
+ if (!instance) {
+ error = -ENODEV;
+ goto out_kfree_ioc;
+ }
+
+ /*
+ * We will allow only MEGASAS_INT_CMDS number of parallel ioctl cmds
+ */
+ if (down_interruptible(&instance->ioctl_sem)) {
+ error = -ERESTARTSYS;
+ goto out_kfree_ioc;
+ }
+ error = megasas_mgmt_fw_ioctl(instance, user_ioc, ioc);
+ up(&instance->ioctl_sem);
+
+ out_kfree_ioc:
+ kfree(ioc);
+ return error;
+}
+
+static int megasas_mgmt_ioctl_aen(struct file *file, unsigned long arg)
+{
+ struct megasas_instance *instance;
+ struct megasas_aen aen;
+ int error;
+
+ if (file->private_data != file) {
+ printk(KERN_DEBUG "megasas: fasync_helper was not "
+ "called first\n");
+ return -EINVAL;
+ }
+
+ if (copy_from_user(&aen, (void __user *)arg, sizeof(aen)))
+ return -EFAULT;
+
+ instance = megasas_lookup_instance(aen.host_no);
+
+ if (!instance)
+ return -ENODEV;
+
+ down(&instance->aen_mutex);
+ error = megasas_register_aen(instance, aen.seq_num,
+ aen.class_locale_word);
+ up(&instance->aen_mutex);
+ return error;
+}
+
+/**
+ * megasas_mgmt_ioctl - char node ioctl entry point
+ */
+static long
+megasas_mgmt_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+ switch (cmd) {
+ case MEGASAS_IOC_FIRMWARE:
+ return megasas_mgmt_ioctl_fw(file, arg);
+
+ case MEGASAS_IOC_GET_AEN:
+ return megasas_mgmt_ioctl_aen(file, arg);
+ }
+
+ return -ENOTTY;
+}
+
+#ifdef CONFIG_COMPAT
+static int megasas_mgmt_compat_ioctl_fw(struct file *file, unsigned long arg)
+{
+ struct compat_megasas_iocpacket __user *cioc =
+ (struct compat_megasas_iocpacket __user *)arg;
+ struct megasas_iocpacket __user *ioc =
+ compat_alloc_user_space(sizeof(struct megasas_iocpacket));
+ int i;
+ int error = 0;
+
+ clear_user(ioc, sizeof(*ioc));
+
+ if (copy_in_user(&ioc->host_no, &cioc->host_no, sizeof(u16)) ||
+ copy_in_user(&ioc->sgl_off, &cioc->sgl_off, sizeof(u32)) ||
+ copy_in_user(&ioc->sense_off, &cioc->sense_off, sizeof(u32)) ||
+ copy_in_user(&ioc->sense_len, &cioc->sense_len, sizeof(u32)) ||
+ copy_in_user(ioc->frame.raw, cioc->frame.raw, 128) ||
+ copy_in_user(&ioc->sge_count, &cioc->sge_count, sizeof(u32)))
+ return -EFAULT;
+
+ for (i = 0; i < MAX_IOCTL_SGE; i++) {
+ compat_uptr_t ptr;
+
+ if (get_user(ptr, &cioc->sgl[i].iov_base) ||
+ put_user(compat_ptr(ptr), &ioc->sgl[i].iov_base) ||
+ copy_in_user(&ioc->sgl[i].iov_len,
+ &cioc->sgl[i].iov_len, sizeof(compat_size_t)))
+ return -EFAULT;
+ }
+
+ error = megasas_mgmt_ioctl_fw(file, (unsigned long)ioc);
+
+ if (copy_in_user(&cioc->frame.hdr.cmd_status,
+ &ioc->frame.hdr.cmd_status, sizeof(u8))) {
+ printk(KERN_DEBUG "megasas: error copy_in_user cmd_status\n");
+ return -EFAULT;
+ }
+ return error;
+}
+
+static long
+megasas_mgmt_compat_ioctl(struct file *file, unsigned int cmd,
+ unsigned long arg)
+{
+ switch (cmd) {
+ case MEGASAS_IOC_FIRMWARE:{
+ return megasas_mgmt_compat_ioctl_fw(file, arg);
+ }
+ case MEGASAS_IOC_GET_AEN:
+ return megasas_mgmt_ioctl_aen(file, arg);
+ }
+
+ return -ENOTTY;
+}
+#endif
+
+/*
+ * File operations structure for management interface
+ */
+static struct file_operations megasas_mgmt_fops = {
+ .owner = THIS_MODULE,
+ .open = megasas_mgmt_open,
+ .release = megasas_mgmt_release,
+ .fasync = megasas_mgmt_fasync,
+ .unlocked_ioctl = megasas_mgmt_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = megasas_mgmt_compat_ioctl,
+#endif
+};
+
+/*
+ * PCI hotplug support registration structure
+ */
+static struct pci_driver megasas_pci_driver = {
+
+ .name = "megaraid_sas",
+ .id_table = megasas_pci_table,
+ .probe = megasas_probe_one,
+ .remove = __devexit_p(megasas_detach_one),
+ .shutdown = megasas_shutdown,
+};
+
+/*
+ * Sysfs driver attributes
+ */
+static ssize_t megasas_sysfs_show_version(struct device_driver *dd, char *buf)
+{
+ return snprintf(buf, strlen(MEGASAS_VERSION) + 2, "%s\n",
+ MEGASAS_VERSION);
+}
+
+static DRIVER_ATTR(version, S_IRUGO, megasas_sysfs_show_version, NULL);
+
+static ssize_t
+megasas_sysfs_show_release_date(struct device_driver *dd, char *buf)
+{
+ return snprintf(buf, strlen(MEGASAS_RELDATE) + 2, "%s\n",
+ MEGASAS_RELDATE);
+}
+
+static DRIVER_ATTR(release_date, S_IRUGO, megasas_sysfs_show_release_date,
+ NULL);
+
+/**
+ * megasas_init - Driver load entry point
+ */
+static int __init megasas_init(void)
+{
+ int rval;
+
+ /*
+ * Announce driver version and other information
+ */
+ printk(KERN_INFO "megasas: %s %s\n", MEGASAS_VERSION,
+ MEGASAS_EXT_VERSION);
+
+ memset(&megasas_mgmt_info, 0, sizeof(megasas_mgmt_info));
+
+ /*
+ * Register character device node
+ */
+ rval = register_chrdev(0, "megaraid_sas_ioctl", &megasas_mgmt_fops);
+
+ if (rval < 0) {
+ printk(KERN_DEBUG "megasas: failed to open device node\n");
+ return rval;
+ }
+
+ megasas_mgmt_majorno = rval;
+
+ /*
+ * Register ourselves as PCI hotplug module
+ */
+ rval = pci_module_init(&megasas_pci_driver);
+
+ if (rval) {
+ printk(KERN_DEBUG "megasas: PCI hotplug regisration failed \n");
+ unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
+ }
+
+ driver_create_file(&megasas_pci_driver.driver, &driver_attr_version);
+ driver_create_file(&megasas_pci_driver.driver,
+ &driver_attr_release_date);
+
+ return rval;
+}
+
+/**
+ * megasas_exit - Driver unload entry point
+ */
+static void __exit megasas_exit(void)
+{
+ driver_remove_file(&megasas_pci_driver.driver, &driver_attr_version);
+ driver_remove_file(&megasas_pci_driver.driver,
+ &driver_attr_release_date);
+
+ pci_unregister_driver(&megasas_pci_driver);
+ unregister_chrdev(megasas_mgmt_majorno, "megaraid_sas_ioctl");
+}
+
+module_init(megasas_init);
+module_exit(megasas_exit);
diff --git a/drivers/scsi/megaraid/megaraid_sas.h b/drivers/scsi/megaraid/megaraid_sas.h
new file mode 100644
index 0000000..eaec9d5
--- /dev/null
+++ b/drivers/scsi/megaraid/megaraid_sas.h
@@ -0,0 +1,1142 @@
+/*
+ *
+ * Linux MegaRAID driver for SAS based RAID controllers
+ *
+ * Copyright (c) 2003-2005 LSI Logic 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.
+ *
+ * FILE : megaraid_sas.h
+ */
+
+#ifndef LSI_MEGARAID_SAS_H
+#define LSI_MEGARAID_SAS_H
+
+/**
+ * MegaRAID SAS Driver meta data
+ */
+#define MEGASAS_VERSION "00.00.02.00-rc4"
+#define MEGASAS_RELDATE "Sep 16, 2005"
+#define MEGASAS_EXT_VERSION "Fri Sep 16 12:37:08 EDT 2005"
+
+/*
+ * =====================================
+ * MegaRAID SAS MFI firmware definitions
+ * =====================================
+ */
+
+/*
+ * MFI stands for MegaRAID SAS FW Interface. This is just a moniker for
+ * protocol between the software and firmware. Commands are issued using
+ * "message frames"
+ */
+
+/**
+ * FW posts its state in upper 4 bits of outbound_msg_0 register
+ */
+#define MFI_STATE_MASK 0xF0000000
+#define MFI_STATE_UNDEFINED 0x00000000
+#define MFI_STATE_BB_INIT 0x10000000
+#define MFI_STATE_FW_INIT 0x40000000
+#define MFI_STATE_WAIT_HANDSHAKE 0x60000000
+#define MFI_STATE_FW_INIT_2 0x70000000
+#define MFI_STATE_DEVICE_SCAN 0x80000000
+#define MFI_STATE_FLUSH_CACHE 0xA0000000
+#define MFI_STATE_READY 0xB0000000
+#define MFI_STATE_OPERATIONAL 0xC0000000
+#define MFI_STATE_FAULT 0xF0000000
+
+#define MEGAMFI_FRAME_SIZE 64
+
+/**
+ * During FW init, clear pending cmds & reset state using inbound_msg_0
+ *
+ * ABORT : Abort all pending cmds
+ * READY : Move from OPERATIONAL to READY state; discard queue info
+ * MFIMODE : Discard (possible) low MFA posted in 64-bit mode (??)
+ * CLR_HANDSHAKE: FW is waiting for HANDSHAKE from BIOS or Driver
+ */
+#define MFI_INIT_ABORT 0x00000000
+#define MFI_INIT_READY 0x00000002
+#define MFI_INIT_MFIMODE 0x00000004
+#define MFI_INIT_CLEAR_HANDSHAKE 0x00000008
+#define MFI_RESET_FLAGS MFI_INIT_READY|MFI_INIT_MFIMODE
+
+/**
+ * MFI frame flags
+ */
+#define MFI_FRAME_POST_IN_REPLY_QUEUE 0x0000
+#define MFI_FRAME_DONT_POST_IN_REPLY_QUEUE 0x0001
+#define MFI_FRAME_SGL32 0x0000
+#define MFI_FRAME_SGL64 0x0002
+#define MFI_FRAME_SENSE32 0x0000
+#define MFI_FRAME_SENSE64 0x0004
+#define MFI_FRAME_DIR_NONE 0x0000
+#define MFI_FRAME_DIR_WRITE 0x0008
+#define MFI_FRAME_DIR_READ 0x0010
+#define MFI_FRAME_DIR_BOTH 0x0018
+
+/**
+ * Definition for cmd_status
+ */
+#define MFI_CMD_STATUS_POLL_MODE 0xFF
+
+/**
+ * MFI command opcodes
+ */
+#define MFI_CMD_INIT 0x00
+#define MFI_CMD_LD_READ 0x01
+#define MFI_CMD_LD_WRITE 0x02
+#define MFI_CMD_LD_SCSI_IO 0x03
+#define MFI_CMD_PD_SCSI_IO 0x04
+#define MFI_CMD_DCMD 0x05
+#define MFI_CMD_ABORT 0x06
+#define MFI_CMD_SMP 0x07
+#define MFI_CMD_STP 0x08
+
+#define MR_DCMD_CTRL_GET_INFO 0x01010000
+
+#define MR_DCMD_CTRL_CACHE_FLUSH 0x01101000
+#define MR_FLUSH_CTRL_CACHE 0x01
+#define MR_FLUSH_DISK_CACHE 0x02
+
+#define MR_DCMD_CTRL_SHUTDOWN 0x01050000
+#define MR_ENABLE_DRIVE_SPINDOWN 0x01
+
+#define MR_DCMD_CTRL_EVENT_GET_INFO 0x01040100
+#define MR_DCMD_CTRL_EVENT_GET 0x01040300
+#define MR_DCMD_CTRL_EVENT_WAIT 0x01040500
+#define MR_DCMD_LD_GET_PROPERTIES 0x03030000
+
+#define MR_DCMD_CLUSTER 0x08000000
+#define MR_DCMD_CLUSTER_RESET_ALL 0x08010100
+#define MR_DCMD_CLUSTER_RESET_LD 0x08010200
+
+/**
+ * MFI command completion codes
+ */
+enum MFI_STAT {
+ MFI_STAT_OK = 0x00,
+ MFI_STAT_INVALID_CMD = 0x01,
+ MFI_STAT_INVALID_DCMD = 0x02,
+ MFI_STAT_INVALID_PARAMETER = 0x03,
+ MFI_STAT_INVALID_SEQUENCE_NUMBER = 0x04,
+ MFI_STAT_ABORT_NOT_POSSIBLE = 0x05,
+ MFI_STAT_APP_HOST_CODE_NOT_FOUND = 0x06,
+ MFI_STAT_APP_IN_USE = 0x07,
+ MFI_STAT_APP_NOT_INITIALIZED = 0x08,
+ MFI_STAT_ARRAY_INDEX_INVALID = 0x09,
+ MFI_STAT_ARRAY_ROW_NOT_EMPTY = 0x0a,
+ MFI_STAT_CONFIG_RESOURCE_CONFLICT = 0x0b,
+ MFI_STAT_DEVICE_NOT_FOUND = 0x0c,
+ MFI_STAT_DRIVE_TOO_SMALL = 0x0d,
+ MFI_STAT_FLASH_ALLOC_FAIL = 0x0e,
+ MFI_STAT_FLASH_BUSY = 0x0f,
+ MFI_STAT_FLASH_ERROR = 0x10,
+ MFI_STAT_FLASH_IMAGE_BAD = 0x11,
+ MFI_STAT_FLASH_IMAGE_INCOMPLETE = 0x12,
+ MFI_STAT_FLASH_NOT_OPEN = 0x13,
+ MFI_STAT_FLASH_NOT_STARTED = 0x14,
+ MFI_STAT_FLUSH_FAILED = 0x15,
+ MFI_STAT_HOST_CODE_NOT_FOUNT = 0x16,
+ MFI_STAT_LD_CC_IN_PROGRESS = 0x17,
+ MFI_STAT_LD_INIT_IN_PROGRESS = 0x18,
+ MFI_STAT_LD_LBA_OUT_OF_RANGE = 0x19,
+ MFI_STAT_LD_MAX_CONFIGURED = 0x1a,
+ MFI_STAT_LD_NOT_OPTIMAL = 0x1b,
+ MFI_STAT_LD_RBLD_IN_PROGRESS = 0x1c,
+ MFI_STAT_LD_RECON_IN_PROGRESS = 0x1d,
+ MFI_STAT_LD_WRONG_RAID_LEVEL = 0x1e,
+ MFI_STAT_MAX_SPARES_EXCEEDED = 0x1f,
+ MFI_STAT_MEMORY_NOT_AVAILABLE = 0x20,
+ MFI_STAT_MFC_HW_ERROR = 0x21,
+ MFI_STAT_NO_HW_PRESENT = 0x22,
+ MFI_STAT_NOT_FOUND = 0x23,
+ MFI_STAT_NOT_IN_ENCL = 0x24,
+ MFI_STAT_PD_CLEAR_IN_PROGRESS = 0x25,
+ MFI_STAT_PD_TYPE_WRONG = 0x26,
+ MFI_STAT_PR_DISABLED = 0x27,
+ MFI_STAT_ROW_INDEX_INVALID = 0x28,
+ MFI_STAT_SAS_CONFIG_INVALID_ACTION = 0x29,
+ MFI_STAT_SAS_CONFIG_INVALID_DATA = 0x2a,
+ MFI_STAT_SAS_CONFIG_INVALID_PAGE = 0x2b,
+ MFI_STAT_SAS_CONFIG_INVALID_TYPE = 0x2c,
+ MFI_STAT_SCSI_DONE_WITH_ERROR = 0x2d,
+ MFI_STAT_SCSI_IO_FAILED = 0x2e,
+ MFI_STAT_SCSI_RESERVATION_CONFLICT = 0x2f,
+ MFI_STAT_SHUTDOWN_FAILED = 0x30,
+ MFI_STAT_TIME_NOT_SET = 0x31,
+ MFI_STAT_WRONG_STATE = 0x32,
+ MFI_STAT_LD_OFFLINE = 0x33,
+ MFI_STAT_PEER_NOTIFICATION_REJECTED = 0x34,
+ MFI_STAT_PEER_NOTIFICATION_FAILED = 0x35,
+ MFI_STAT_RESERVATION_IN_PROGRESS = 0x36,
+ MFI_STAT_I2C_ERRORS_DETECTED = 0x37,
+ MFI_STAT_PCI_ERRORS_DETECTED = 0x38,
+
+ MFI_STAT_INVALID_STATUS = 0xFF
+};
+
+/*
+ * Number of mailbox bytes in DCMD message frame
+ */
+#define MFI_MBOX_SIZE 12
+
+enum MR_EVT_CLASS {
+
+ MR_EVT_CLASS_DEBUG = -2,
+ MR_EVT_CLASS_PROGRESS = -1,
+ MR_EVT_CLASS_INFO = 0,
+ MR_EVT_CLASS_WARNING = 1,
+ MR_EVT_CLASS_CRITICAL = 2,
+ MR_EVT_CLASS_FATAL = 3,
+ MR_EVT_CLASS_DEAD = 4,
+
+};
+
+enum MR_EVT_LOCALE {
+
+ MR_EVT_LOCALE_LD = 0x0001,
+ MR_EVT_LOCALE_PD = 0x0002,
+ MR_EVT_LOCALE_ENCL = 0x0004,
+ MR_EVT_LOCALE_BBU = 0x0008,
+ MR_EVT_LOCALE_SAS = 0x0010,
+ MR_EVT_LOCALE_CTRL = 0x0020,
+ MR_EVT_LOCALE_CONFIG = 0x0040,
+ MR_EVT_LOCALE_CLUSTER = 0x0080,
+ MR_EVT_LOCALE_ALL = 0xffff,
+
+};
+
+enum MR_EVT_ARGS {
+
+ MR_EVT_ARGS_NONE,
+ MR_EVT_ARGS_CDB_SENSE,
+ MR_EVT_ARGS_LD,
+ MR_EVT_ARGS_LD_COUNT,
+ MR_EVT_ARGS_LD_LBA,
+ MR_EVT_ARGS_LD_OWNER,
+ MR_EVT_ARGS_LD_LBA_PD_LBA,
+ MR_EVT_ARGS_LD_PROG,
+ MR_EVT_ARGS_LD_STATE,
+ MR_EVT_ARGS_LD_STRIP,
+ MR_EVT_ARGS_PD,
+ MR_EVT_ARGS_PD_ERR,
+ MR_EVT_ARGS_PD_LBA,
+ MR_EVT_ARGS_PD_LBA_LD,
+ MR_EVT_ARGS_PD_PROG,
+ MR_EVT_ARGS_PD_STATE,
+ MR_EVT_ARGS_PCI,
+ MR_EVT_ARGS_RATE,
+ MR_EVT_ARGS_STR,
+ MR_EVT_ARGS_TIME,
+ MR_EVT_ARGS_ECC,
+
+};
+
+/*
+ * SAS controller properties
+ */
+struct megasas_ctrl_prop {
+
+ u16 seq_num;
+ u16 pred_fail_poll_interval;
+ u16 intr_throttle_count;
+ u16 intr_throttle_timeouts;
+ u8 rebuild_rate;
+ u8 patrol_read_rate;
+ u8 bgi_rate;
+ u8 cc_rate;
+ u8 recon_rate;
+ u8 cache_flush_interval;
+ u8 spinup_drv_count;
+ u8 spinup_delay;
+ u8 cluster_enable;
+ u8 coercion_mode;
+ u8 alarm_enable;
+ u8 disable_auto_rebuild;
+ u8 disable_battery_warn;
+ u8 ecc_bucket_size;
+ u16 ecc_bucket_leak_rate;
+ u8 restore_hotspare_on_insertion;
+ u8 expose_encl_devices;
+ u8 reserved[38];
+
+} __attribute__ ((packed));
+
+/*
+ * SAS controller information
+ */
+struct megasas_ctrl_info {
+
+ /*
+ * PCI device information
+ */
+ struct {
+
+ u16 vendor_id;
+ u16 device_id;
+ u16 sub_vendor_id;
+ u16 sub_device_id;
+ u8 reserved[24];
+
+ } __attribute__ ((packed)) pci;
+
+ /*
+ * Host interface information
+ */
+ struct {
+
+ u8 PCIX:1;
+ u8 PCIE:1;
+ u8 iSCSI:1;
+ u8 SAS_3G:1;
+ u8 reserved_0:4;
+ u8 reserved_1[6];
+ u8 port_count;
+ u64 port_addr[8];
+
+ } __attribute__ ((packed)) host_interface;
+
+ /*
+ * Device (backend) interface information
+ */
+ struct {
+
+ u8 SPI:1;
+ u8 SAS_3G:1;
+ u8 SATA_1_5G:1;
+ u8 SATA_3G:1;
+ u8 reserved_0:4;
+ u8 reserved_1[6];
+ u8 port_count;
+ u64 port_addr[8];
+
+ } __attribute__ ((packed)) device_interface;
+
+ /*
+ * List of components residing in flash. All str are null terminated
+ */
+ u32 image_check_word;
+ u32 image_component_count;
+
+ struct {
+
+ char name[8];
+ char version[32];
+ char build_date[16];
+ char built_time[16];
+
+ } __attribute__ ((packed)) image_component[8];
+
+ /*
+ * List of flash components that have been flashed on the card, but
+ * are not in use, pending reset of the adapter. This list will be
+ * empty if a flash operation has not occurred. All stings are null
+ * terminated
+ */
+ u32 pending_image_component_count;
+
+ struct {
+
+ char name[8];
+ char version[32];
+ char build_date[16];
+ char build_time[16];
+
+ } __attribute__ ((packed)) pending_image_component[8];
+
+ u8 max_arms;
+ u8 max_spans;
+ u8 max_arrays;
+ u8 max_lds;
+
+ char product_name[80];
+ char serial_no[32];
+
+ /*
+ * Other physical/controller/operation information. Indicates the
+ * presence of the hardware
+ */
+ struct {
+
+ u32 bbu:1;
+ u32 alarm:1;
+ u32 nvram:1;
+ u32 uart:1;
+ u32 reserved:28;
+
+ } __attribute__ ((packed)) hw_present;
+
+ u32 current_fw_time;
+
+ /*
+ * Maximum data transfer sizes
+ */
+ u16 max_concurrent_cmds;
+ u16 max_sge_count;
+ u32 max_request_size;
+
+ /*
+ * Logical and physical device counts
+ */
+ u16 ld_present_count;
+ u16 ld_degraded_count;
+ u16 ld_offline_count;
+
+ u16 pd_present_count;
+ u16 pd_disk_present_count;
+ u16 pd_disk_pred_failure_count;
+ u16 pd_disk_failed_count;
+
+ /*
+ * Memory size information
+ */
+ u16 nvram_size;
+ u16 memory_size;
+ u16 flash_size;
+
+ /*
+ * Error counters
+ */
+ u16 mem_correctable_error_count;
+ u16 mem_uncorrectable_error_count;
+
+ /*
+ * Cluster information
+ */
+ u8 cluster_permitted;
+ u8 cluster_active;
+
+ /*
+ * Additional max data transfer sizes
+ */
+ u16 max_strips_per_io;
+
+ /*
+ * Controller capabilities structures
+ */
+ struct {
+
+ u32 raid_level_0:1;
+ u32 raid_level_1:1;
+ u32 raid_level_5:1;
+ u32 raid_level_1E:1;
+ u32 raid_level_6:1;
+ u32 reserved:27;
+
+ } __attribute__ ((packed)) raid_levels;
+
+ struct {
+
+ u32 rbld_rate:1;
+ u32 cc_rate:1;
+ u32 bgi_rate:1;
+ u32 recon_rate:1;
+ u32 patrol_rate:1;
+ u32 alarm_control:1;
+ u32 cluster_supported:1;
+ u32 bbu:1;
+ u32 spanning_allowed:1;
+ u32 dedicated_hotspares:1;
+ u32 revertible_hotspares:1;
+ u32 foreign_config_import:1;
+ u32 self_diagnostic:1;
+ u32 mixed_redundancy_arr:1;
+ u32 global_hot_spares:1;
+ u32 reserved:17;
+
+ } __attribute__ ((packed)) adapter_operations;
+
+ struct {
+
+ u32 read_policy:1;
+ u32 write_policy:1;
+ u32 io_policy:1;
+ u32 access_policy:1;
+ u32 disk_cache_policy:1;
+ u32 reserved:27;
+
+ } __attribute__ ((packed)) ld_operations;
+
+ struct {
+
+ u8 min;
+ u8 max;
+ u8 reserved[2];
+
+ } __attribute__ ((packed)) stripe_sz_ops;
+
+ struct {
+
+ u32 force_online:1;
+ u32 force_offline:1;
+ u32 force_rebuild:1;
+ u32 reserved:29;
+
+ } __attribute__ ((packed)) pd_operations;
+
+ struct {
+
+ u32 ctrl_supports_sas:1;
+ u32 ctrl_supports_sata:1;
+ u32 allow_mix_in_encl:1;
+ u32 allow_mix_in_ld:1;
+ u32 allow_sata_in_cluster:1;
+ u32 reserved:27;
+
+ } __attribute__ ((packed)) pd_mix_support;
+
+ /*
+ * Define ECC single-bit-error bucket information
+ */
+ u8 ecc_bucket_count;
+ u8 reserved_2[11];
+
+ /*
+ * Include the controller properties (changeable items)
+ */
+ struct megasas_ctrl_prop properties;
+
+ /*
+ * Define FW pkg version (set in envt v'bles on OEM basis)
+ */
+ char package_version[0x60];
+
+ u8 pad[0x800 - 0x6a0];
+
+} __attribute__ ((packed));
+
+/*
+ * ===============================
+ * MegaRAID SAS driver definitions
+ * ===============================
+ */
+#define MEGASAS_MAX_PD_CHANNELS 2
+#define MEGASAS_MAX_LD_CHANNELS 2
+#define MEGASAS_MAX_CHANNELS (MEGASAS_MAX_PD_CHANNELS + \
+ MEGASAS_MAX_LD_CHANNELS)
+#define MEGASAS_MAX_DEV_PER_CHANNEL 128
+#define MEGASAS_DEFAULT_INIT_ID -1
+#define MEGASAS_MAX_LUN 8
+#define MEGASAS_MAX_LD 64
+
+/*
+ * When SCSI mid-layer calls driver's reset routine, driver waits for
+ * MEGASAS_RESET_WAIT_TIME seconds for all outstanding IO to complete. Note
+ * that the driver cannot _actually_ abort or reset pending commands. While
+ * it is waiting for the commands to complete, it prints a diagnostic message
+ * every MEGASAS_RESET_NOTICE_INTERVAL seconds
+ */
+#define MEGASAS_RESET_WAIT_TIME 180
+#define MEGASAS_RESET_NOTICE_INTERVAL 5
+
+#define MEGASAS_IOCTL_CMD 0
+
+/*
+ * 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
+ * lower number to the mid layer because it can issue a few internal commands
+ * itself (E.g, AEN, abort cmd, IOCTLs etc). The number of commands it needs
+ * is shown below
+ */
+#define MEGASAS_INT_CMDS 32
+
+/*
+ * FW can accept both 32 and 64 bit SGLs. We want to allocate 32/64 bit
+ * SGLs based on the size of dma_addr_t
+ */
+#define IS_DMA64 (sizeof(dma_addr_t) == 8)
+
+#define MFI_OB_INTR_STATUS_MASK 0x00000002
+#define MFI_POLL_TIMEOUT_SECS 10
+
+struct megasas_register_set {
+
+ u32 reserved_0[4]; /*0000h */
+
+ u32 inbound_msg_0; /*0010h */
+ u32 inbound_msg_1; /*0014h */
+ u32 outbound_msg_0; /*0018h */
+ u32 outbound_msg_1; /*001Ch */
+
+ u32 inbound_doorbell; /*0020h */
+ u32 inbound_intr_status; /*0024h */
+ u32 inbound_intr_mask; /*0028h */
+
+ u32 outbound_doorbell; /*002Ch */
+ u32 outbound_intr_status; /*0030h */
+ u32 outbound_intr_mask; /*0034h */
+
+ u32 reserved_1[2]; /*0038h */
+
+ u32 inbound_queue_port; /*0040h */
+ u32 outbound_queue_port; /*0044h */
+
+ u32 reserved_2; /*004Ch */
+
+ u32 index_registers[1004]; /*0050h */
+
+} __attribute__ ((packed));
+
+struct megasas_sge32 {
+
+ u32 phys_addr;
+ u32 length;
+
+} __attribute__ ((packed));
+
+struct megasas_sge64 {
+
+ u64 phys_addr;
+ u32 length;
+
+} __attribute__ ((packed));
+
+union megasas_sgl {
+
+ struct megasas_sge32 sge32[1];
+ struct megasas_sge64 sge64[1];
+
+} __attribute__ ((packed));
+
+struct megasas_header {
+
+ u8 cmd; /*00h */
+ u8 sense_len; /*01h */
+ u8 cmd_status; /*02h */
+ u8 scsi_status; /*03h */
+
+ u8 target_id; /*04h */
+ u8 lun; /*05h */
+ u8 cdb_len; /*06h */
+ u8 sge_count; /*07h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 timeout; /*12h */
+ u32 data_xferlen; /*14h */
+
+} __attribute__ ((packed));
+
+union megasas_sgl_frame {
+
+ struct megasas_sge32 sge32[8];
+ struct megasas_sge64 sge64[5];
+
+} __attribute__ ((packed));
+
+struct megasas_init_frame {
+
+ u8 cmd; /*00h */
+ u8 reserved_0; /*01h */
+ u8 cmd_status; /*02h */
+
+ u8 reserved_1; /*03h */
+ u32 reserved_2; /*04h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 reserved_3; /*12h */
+ u32 data_xfer_len; /*14h */
+
+ u32 queue_info_new_phys_addr_lo; /*18h */
+ u32 queue_info_new_phys_addr_hi; /*1Ch */
+ u32 queue_info_old_phys_addr_lo; /*20h */
+ u32 queue_info_old_phys_addr_hi; /*24h */
+
+ u32 reserved_4[6]; /*28h */
+
+} __attribute__ ((packed));
+
+struct megasas_init_queue_info {
+
+ u32 init_flags; /*00h */
+ u32 reply_queue_entries; /*04h */
+
+ u32 reply_queue_start_phys_addr_lo; /*08h */
+ u32 reply_queue_start_phys_addr_hi; /*0Ch */
+ u32 producer_index_phys_addr_lo; /*10h */
+ u32 producer_index_phys_addr_hi; /*14h */
+ u32 consumer_index_phys_addr_lo; /*18h */
+ u32 consumer_index_phys_addr_hi; /*1Ch */
+
+} __attribute__ ((packed));
+
+struct megasas_io_frame {
+
+ u8 cmd; /*00h */
+ u8 sense_len; /*01h */
+ u8 cmd_status; /*02h */
+ u8 scsi_status; /*03h */
+
+ u8 target_id; /*04h */
+ u8 access_byte; /*05h */
+ u8 reserved_0; /*06h */
+ u8 sge_count; /*07h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 timeout; /*12h */
+ u32 lba_count; /*14h */
+
+ u32 sense_buf_phys_addr_lo; /*18h */
+ u32 sense_buf_phys_addr_hi; /*1Ch */
+
+ u32 start_lba_lo; /*20h */
+ u32 start_lba_hi; /*24h */
+
+ union megasas_sgl sgl; /*28h */
+
+} __attribute__ ((packed));
+
+struct megasas_pthru_frame {
+
+ u8 cmd; /*00h */
+ u8 sense_len; /*01h */
+ u8 cmd_status; /*02h */
+ u8 scsi_status; /*03h */
+
+ u8 target_id; /*04h */
+ u8 lun; /*05h */
+ u8 cdb_len; /*06h */
+ u8 sge_count; /*07h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 timeout; /*12h */
+ u32 data_xfer_len; /*14h */
+
+ u32 sense_buf_phys_addr_lo; /*18h */
+ u32 sense_buf_phys_addr_hi; /*1Ch */
+
+ u8 cdb[16]; /*20h */
+ union megasas_sgl sgl; /*30h */
+
+} __attribute__ ((packed));
+
+struct megasas_dcmd_frame {
+
+ u8 cmd; /*00h */
+ u8 reserved_0; /*01h */
+ u8 cmd_status; /*02h */
+ u8 reserved_1[4]; /*03h */
+ u8 sge_count; /*07h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 timeout; /*12h */
+
+ u32 data_xfer_len; /*14h */
+ u32 opcode; /*18h */
+
+ union { /*1Ch */
+ u8 b[12];
+ u16 s[6];
+ u32 w[3];
+ } mbox;
+
+ union megasas_sgl sgl; /*28h */
+
+} __attribute__ ((packed));
+
+struct megasas_abort_frame {
+
+ u8 cmd; /*00h */
+ u8 reserved_0; /*01h */
+ u8 cmd_status; /*02h */
+
+ u8 reserved_1; /*03h */
+ u32 reserved_2; /*04h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 reserved_3; /*12h */
+ u32 reserved_4; /*14h */
+
+ u32 abort_context; /*18h */
+ u32 pad_1; /*1Ch */
+
+ u32 abort_mfi_phys_addr_lo; /*20h */
+ u32 abort_mfi_phys_addr_hi; /*24h */
+
+ u32 reserved_5[6]; /*28h */
+
+} __attribute__ ((packed));
+
+struct megasas_smp_frame {
+
+ u8 cmd; /*00h */
+ u8 reserved_1; /*01h */
+ u8 cmd_status; /*02h */
+ u8 connection_status; /*03h */
+
+ u8 reserved_2[3]; /*04h */
+ u8 sge_count; /*07h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 timeout; /*12h */
+
+ u32 data_xfer_len; /*14h */
+ u64 sas_addr; /*18h */
+
+ union {
+ struct megasas_sge32 sge32[2]; /* [0]: resp [1]: req */
+ struct megasas_sge64 sge64[2]; /* [0]: resp [1]: req */
+ } sgl;
+
+} __attribute__ ((packed));
+
+struct megasas_stp_frame {
+
+ u8 cmd; /*00h */
+ u8 reserved_1; /*01h */
+ u8 cmd_status; /*02h */
+ u8 reserved_2; /*03h */
+
+ u8 target_id; /*04h */
+ u8 reserved_3[2]; /*05h */
+ u8 sge_count; /*07h */
+
+ u32 context; /*08h */
+ u32 pad_0; /*0Ch */
+
+ u16 flags; /*10h */
+ u16 timeout; /*12h */
+
+ u32 data_xfer_len; /*14h */
+
+ u16 fis[10]; /*18h */
+ u32 stp_flags;
+
+ union {
+ struct megasas_sge32 sge32[2]; /* [0]: resp [1]: data */
+ struct megasas_sge64 sge64[2]; /* [0]: resp [1]: data */
+ } sgl;
+
+} __attribute__ ((packed));
+
+union megasas_frame {
+
+ struct megasas_header hdr;
+ struct megasas_init_frame init;
+ struct megasas_io_frame io;
+ struct megasas_pthru_frame pthru;
+ struct megasas_dcmd_frame dcmd;
+ struct megasas_abort_frame abort;
+ struct megasas_smp_frame smp;
+ struct megasas_stp_frame stp;
+
+ u8 raw_bytes[64];
+};
+
+struct megasas_cmd;
+
+union megasas_evt_class_locale {
+
+ struct {
+ u16 locale;
+ u8 reserved;
+ s8 class;
+ } __attribute__ ((packed)) members;
+
+ u32 word;
+
+} __attribute__ ((packed));
+
+struct megasas_evt_log_info {
+ u32 newest_seq_num;
+ u32 oldest_seq_num;
+ u32 clear_seq_num;
+ u32 shutdown_seq_num;
+ u32 boot_seq_num;
+
+} __attribute__ ((packed));
+
+struct megasas_progress {
+
+ u16 progress;
+ u16 elapsed_seconds;
+
+} __attribute__ ((packed));
+
+struct megasas_evtarg_ld {
+
+ u16 target_id;
+ u8 ld_index;
+ u8 reserved;
+
+} __attribute__ ((packed));
+
+struct megasas_evtarg_pd {
+ u16 device_id;
+ u8 encl_index;
+ u8 slot_number;
+
+} __attribute__ ((packed));
+
+struct megasas_evt_detail {
+
+ u32 seq_num;
+ u32 time_stamp;
+ u32 code;
+ union megasas_evt_class_locale cl;
+ u8 arg_type;
+ u8 reserved1[15];
+
+ union {
+ struct {
+ struct megasas_evtarg_pd pd;
+ u8 cdb_length;
+ u8 sense_length;
+ u8 reserved[2];
+ u8 cdb[16];
+ u8 sense[64];
+ } __attribute__ ((packed)) cdbSense;
+
+ struct megasas_evtarg_ld ld;
+
+ struct {
+ struct megasas_evtarg_ld ld;
+ u64 count;
+ } __attribute__ ((packed)) ld_count;
+
+ struct {
+ u64 lba;
+ struct megasas_evtarg_ld ld;
+ } __attribute__ ((packed)) ld_lba;
+
+ struct {
+ struct megasas_evtarg_ld ld;
+ u32 prevOwner;
+ u32 newOwner;
+ } __attribute__ ((packed)) ld_owner;
+
+ struct {
+ u64 ld_lba;
+ u64 pd_lba;
+ struct megasas_evtarg_ld ld;
+ struct megasas_evtarg_pd pd;
+ } __attribute__ ((packed)) ld_lba_pd_lba;
+
+ struct {
+ struct megasas_evtarg_ld ld;
+ struct megasas_progress prog;
+ } __attribute__ ((packed)) ld_prog;
+
+ struct {
+ struct megasas_evtarg_ld ld;
+ u32 prev_state;
+ u32 new_state;
+ } __attribute__ ((packed)) ld_state;
+
+ struct {
+ u64 strip;
+ struct megasas_evtarg_ld ld;
+ } __attribute__ ((packed)) ld_strip;
+
+ struct megasas_evtarg_pd pd;
+
+ struct {
+ struct megasas_evtarg_pd pd;
+ u32 err;
+ } __attribute__ ((packed)) pd_err;
+
+ struct {
+ u64 lba;
+ struct megasas_evtarg_pd pd;
+ } __attribute__ ((packed)) pd_lba;
+
+ struct {
+ u64 lba;
+ struct megasas_evtarg_pd pd;
+ struct megasas_evtarg_ld ld;
+ } __attribute__ ((packed)) pd_lba_ld;
+
+ struct {
+ struct megasas_evtarg_pd pd;
+ struct megasas_progress prog;
+ } __attribute__ ((packed)) pd_prog;
+
+ struct {
+ struct megasas_evtarg_pd pd;
+ u32 prevState;
+ u32 newState;
+ } __attribute__ ((packed)) pd_state;
+
+ struct {
+ u16 vendorId;
+ u16 deviceId;
+ u16 subVendorId;
+ u16 subDeviceId;
+ } __attribute__ ((packed)) pci;
+
+ u32 rate;
+ char str[96];
+
+ struct {
+ u32 rtc;
+ u32 elapsedSeconds;
+ } __attribute__ ((packed)) time;
+
+ struct {
+ u32 ecar;
+ u32 elog;
+ char str[64];
+ } __attribute__ ((packed)) ecc;
+
+ u8 b[96];
+ u16 s[48];
+ u32 w[24];
+ u64 d[12];
+ } args;
+
+ char description[128];
+
+} __attribute__ ((packed));
+
+struct megasas_instance {
+
+ u32 *producer;
+ dma_addr_t producer_h;
+ u32 *consumer;
+ dma_addr_t consumer_h;
+
+ u32 *reply_queue;
+ dma_addr_t reply_queue_h;
+
+ unsigned long base_addr;
+ struct megasas_register_set __iomem *reg_set;
+
+ s8 init_id;
+ u8 reserved[3];
+
+ u16 max_num_sge;
+ u16 max_fw_cmds;
+ u32 max_sectors_per_req;
+
+ struct megasas_cmd **cmd_list;
+ struct list_head cmd_pool;
+ spinlock_t cmd_pool_lock;
+ struct dma_pool *frame_dma_pool;
+ struct dma_pool *sense_dma_pool;
+
+ struct megasas_evt_detail *evt_detail;
+ dma_addr_t evt_detail_h;
+ struct megasas_cmd *aen_cmd;
+ struct semaphore aen_mutex;
+ struct semaphore ioctl_sem;
+
+ struct Scsi_Host *host;
+
+ wait_queue_head_t int_cmd_wait_q;
+ wait_queue_head_t abort_cmd_wait_q;
+
+ struct pci_dev *pdev;
+ u32 unique_id;
+
+ u32 fw_outstanding;
+ u32 hw_crit_error;
+ spinlock_t instance_lock;
+};
+
+#define MEGASAS_IS_LOGICAL(scp) \
+ (scp->device->channel < MEGASAS_MAX_PD_CHANNELS) ? 0 : 1
+
+#define MEGASAS_DEV_INDEX(inst, scp) \
+ ((scp->device->channel % 2) * MEGASAS_MAX_DEV_PER_CHANNEL) + \
+ scp->device->id
+
+struct megasas_cmd {
+
+ union megasas_frame *frame;
+ dma_addr_t frame_phys_addr;
+ u8 *sense;
+ dma_addr_t sense_phys_addr;
+
+ u32 index;
+ u8 sync_cmd;
+ u8 cmd_status;
+ u16 abort_aen;
+
+ struct list_head list;
+ struct scsi_cmnd *scmd;
+ struct megasas_instance *instance;
+ u32 frame_count;
+};
+
+#define MAX_MGMT_ADAPTERS 1024
+#define MAX_IOCTL_SGE 16
+
+struct megasas_iocpacket {
+
+ u16 host_no;
+ u16 __pad1;
+ u32 sgl_off;
+ u32 sge_count;
+ u32 sense_off;
+ u32 sense_len;
+ union {
+ u8 raw[128];
+ struct megasas_header hdr;
+ } frame;
+
+ struct iovec sgl[MAX_IOCTL_SGE];
+
+} __attribute__ ((packed));
+
+struct megasas_aen {
+ u16 host_no;
+ u16 __pad1;
+ u32 seq_num;
+ u32 class_locale_word;
+} __attribute__ ((packed));
+
+#ifdef CONFIG_COMPAT
+struct compat_megasas_iocpacket {
+ u16 host_no;
+ u16 __pad1;
+ u32 sgl_off;
+ u32 sge_count;
+ u32 sense_off;
+ u32 sense_len;
+ union {
+ u8 raw[128];
+ struct megasas_header hdr;
+ } frame;
+ struct compat_iovec sgl[MAX_IOCTL_SGE];
+} __attribute__ ((packed));
+
+#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct compat_megasas_iocpacket)
+#else
+#define MEGASAS_IOC_FIRMWARE _IOWR('M', 1, struct megasas_iocpacket)
+#endif
+
+#define MEGASAS_IOC_GET_AEN _IOW('M', 3, struct megasas_aen)
+
+struct megasas_mgmt_info {
+
+ u16 count;
+ struct megasas_instance *instance[MAX_MGMT_ADAPTERS];
+ int max_index;
+};
+
+#endif /*LSI_MEGARAID_SAS_H */