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freebsd/sys/dev/twa/tw_cl_io.c
Vinod Kashyap ff1625c61d twa corresponding to the 9.3.0.1 release on the 3ware website. This driver has 
support for the 9xxxSX controllers, along with the earlier 9xxxS series
controllers.
2005-11-08 22:51:43 +00:00

1491 lines
44 KiB
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/*
* Copyright (c) 2004-05 Applied Micro Circuits Corporation.
* Copyright (c) 2004-05 Vinod Kashyap
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $FreeBSD$
*/
/*
* AMCC'S 3ware driver for 9000 series storage controllers.
*
* Author: Vinod Kashyap
*/
/*
* Common Layer I/O functions.
*/
#include "tw_osl_share.h"
#include "tw_cl_share.h"
#include "tw_cl_fwif.h"
#include "tw_cl_ioctl.h"
#include "tw_cl.h"
#include "tw_cl_externs.h"
#include "tw_osl_ioctl.h"
/*
* Function name: tw_cl_start_io
* Description: Interface to OS Layer for accepting SCSI requests.
*
* Input: ctlr_handle -- controller handle
* req_pkt -- OSL built request packet
* req_handle -- request handle
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cl_start_io(struct tw_cl_ctlr_handle *ctlr_handle,
struct tw_cl_req_packet *req_pkt, struct tw_cl_req_handle *req_handle)
{
struct tw_cli_ctlr_context *ctlr;
struct tw_cli_req_context *req;
struct tw_cl_command_9k *cmd;
struct tw_cl_scsi_req_packet *scsi_req;
TW_INT32 error;
tw_cli_dbg_printf(10, ctlr_handle, tw_osl_cur_func(), "entered");
ctlr = (struct tw_cli_ctlr_context *)(ctlr_handle->cl_ctlr_ctxt);
if (ctlr->state & TW_CLI_CTLR_STATE_RESET_IN_PROGRESS) {
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"I/O during reset: returning busy. Ctlr state = 0x%x",
ctlr->state);
tw_osl_ctlr_busy(ctlr_handle, req_handle);
return(TW_OSL_EBUSY);
}
/*
* If working with a firmware version that does not support multiple
* luns, and this request is directed at a non-zero lun, error it
* back right away.
*/
if ((req_pkt->gen_req_pkt.scsi_req.lun) &&
(ctlr->working_srl < TWA_MULTI_LUN_FW_SRL)) {
req_pkt->status |= (TW_CL_ERR_REQ_INVALID_LUN |
TW_CL_ERR_REQ_SCSI_ERROR);
req_pkt->tw_osl_callback(req_handle);
return(TW_CL_ERR_REQ_SUCCESS);
}
if ((req = tw_cli_get_request(ctlr
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
, req_pkt
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
)) == TW_CL_NULL) {
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"Out of request context packets: returning busy");
tw_osl_ctlr_busy(ctlr_handle, req_handle);
return(TW_OSL_EBUSY);
}
req_handle->cl_req_ctxt = req;
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
req->cmd_pkt = req_pkt->dma_mem;
req->cmd_pkt_phys = req_pkt->dma_mem_phys;
tw_osl_memzero(req->cmd_pkt,
sizeof(struct tw_cl_command_header) +
28 /* max bytes before sglist */);
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
req->req_handle = req_handle;
req->orig_req = req_pkt;
req->tw_cli_callback = tw_cli_complete_io;
req->flags |= TW_CLI_REQ_FLAGS_EXTERNAL;
req->flags |= TW_CLI_REQ_FLAGS_9K;
scsi_req = &(req_pkt->gen_req_pkt.scsi_req);
/* Build the cmd pkt. */
cmd = &(req->cmd_pkt->command.cmd_pkt_9k);
req->cmd_pkt->cmd_hdr.header_desc.size_header = 128;
cmd->res__opcode = BUILD_RES__OPCODE(0, TWA_FW_CMD_EXECUTE_SCSI);
cmd->unit = (TW_UINT8)(scsi_req->unit);
cmd->lun_l4__req_id = TW_CL_SWAP16(
BUILD_LUN_L4__REQ_ID(scsi_req->lun, req->request_id));
cmd->status = 0;
cmd->sgl_offset = 16; /* offset from end of hdr = max cdb len */
tw_osl_memcpy(cmd->cdb, scsi_req->cdb, scsi_req->cdb_len);
if (req_pkt->flags & TW_CL_REQ_CALLBACK_FOR_SGLIST) {
TW_UINT32 num_sgl_entries;
req_pkt->tw_osl_sgl_callback(req_handle, cmd->sg_list,
&num_sgl_entries);
cmd->lun_h4__sgl_entries =
TW_CL_SWAP16(BUILD_LUN_H4__SGL_ENTRIES(scsi_req->lun,
num_sgl_entries));
} else {
cmd->lun_h4__sgl_entries =
TW_CL_SWAP16(BUILD_LUN_H4__SGL_ENTRIES(scsi_req->lun,
scsi_req->sgl_entries));
tw_cli_fill_sg_list(ctlr, scsi_req->sg_list,
cmd->sg_list, scsi_req->sgl_entries);
}
if ((error = tw_cli_submit_cmd(req))) {
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"Could not start request. request = %p, error = %d",
req, error);
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
}
return(error);
}
/*
* Function name: tw_cli_submit_cmd
* Description: Submits a cmd to firmware.
*
* Input: req -- ptr to CL internal request context
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cli_submit_cmd(struct tw_cli_req_context *req)
{
struct tw_cli_ctlr_context *ctlr = req->ctlr;
struct tw_cl_ctlr_handle *ctlr_handle = ctlr->ctlr_handle;
TW_UINT32 status_reg;
TW_INT32 error;
TW_UINT8 notify_osl_of_ctlr_busy = TW_CL_FALSE;
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
TW_SYNC_HANDLE sync_handle;
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
tw_cli_dbg_printf(10, ctlr_handle, tw_osl_cur_func(), "entered");
/* Serialize access to the controller cmd queue. */
tw_osl_get_lock(ctlr_handle, ctlr->io_lock);
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
if (req->flags & TW_CLI_REQ_FLAGS_EXTERNAL) {
if (!(ctlr->flags & TW_CL_DEFERRED_INTR_USED))
tw_osl_sync_isr_block(ctlr_handle, &sync_handle);
} else {
if (ctlr->flags & TW_CL_DEFERRED_INTR_USED)
tw_osl_sync_io_block(ctlr_handle, &sync_handle);
}
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
/* Check to see if we can post a command. */
status_reg = TW_CLI_READ_STATUS_REGISTER(ctlr_handle);
if ((error = tw_cli_check_ctlr_state(ctlr, status_reg)))
goto out;
if (status_reg & TWA_STATUS_COMMAND_QUEUE_FULL) {
struct tw_cl_req_packet *req_pkt =
(struct tw_cl_req_packet *)(req->orig_req);
tw_cli_dbg_printf(7, ctlr_handle, tw_osl_cur_func(),
"Cmd queue full");
if ((req->flags & TW_CLI_REQ_FLAGS_INTERNAL)
#ifndef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
|| ((req_pkt) &&
(req_pkt->flags & TW_CL_REQ_RETRY_ON_BUSY))
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
) {
if (req->state != TW_CLI_REQ_STATE_PENDING) {
tw_cli_dbg_printf(2, ctlr_handle,
tw_osl_cur_func(),
"pending internal/ioctl request");
req->state = TW_CLI_REQ_STATE_PENDING;
tw_cli_req_q_insert_tail(req, TW_CLI_PENDING_Q);
error = 0;
} else
error = TW_OSL_EBUSY;
} else {
notify_osl_of_ctlr_busy = TW_CL_TRUE;
error = TW_OSL_EBUSY;
}
} else {
tw_cli_dbg_printf(10, ctlr_handle, tw_osl_cur_func(),
"Submitting command");
/*
* The controller cmd queue is not full. Mark the request as
* currently being processed by the firmware, and move it into
* the busy queue. Then submit the cmd.
*/
req->state = TW_CLI_REQ_STATE_BUSY;
tw_cli_req_q_insert_tail(req, TW_CLI_BUSY_Q);
TW_CLI_WRITE_COMMAND_QUEUE(ctlr_handle,
req->cmd_pkt_phys +
sizeof(struct tw_cl_command_header));
}
out:
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
if (req->flags & TW_CLI_REQ_FLAGS_EXTERNAL) {
if (!(ctlr->flags & TW_CL_DEFERRED_INTR_USED))
tw_osl_sync_isr_unblock(ctlr_handle, &sync_handle);
} else {
if (ctlr->flags & TW_CL_DEFERRED_INTR_USED)
tw_osl_sync_io_unblock(ctlr_handle, &sync_handle);
}
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
tw_osl_free_lock(ctlr_handle, ctlr->io_lock);
if (status_reg & TWA_STATUS_COMMAND_QUEUE_FULL) {
if (notify_osl_of_ctlr_busy)
tw_osl_ctlr_busy(ctlr_handle, req->req_handle);
/*
* Synchronize access between writes to command and control
* registers in 64-bit environments, on G66.
*/
if (ctlr->state & TW_CLI_CTLR_STATE_G66_WORKAROUND_NEEDED)
tw_osl_get_lock(ctlr_handle, ctlr->io_lock);
/* Unmask command interrupt. */
TW_CLI_WRITE_CONTROL_REGISTER(ctlr_handle,
TWA_CONTROL_UNMASK_COMMAND_INTERRUPT);
if (ctlr->state & TW_CLI_CTLR_STATE_G66_WORKAROUND_NEEDED)
tw_osl_free_lock(ctlr_handle, ctlr->io_lock);
}
return(error);
}
/*
* Function name: tw_cl_fw_passthru
* Description: Interface to OS Layer for accepting firmware
* passthru requests.
* Input: ctlr_handle -- controller handle
* req_pkt -- OSL built request packet
* req_handle -- request handle
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cl_fw_passthru(struct tw_cl_ctlr_handle *ctlr_handle,
struct tw_cl_req_packet *req_pkt, struct tw_cl_req_handle *req_handle)
{
struct tw_cli_ctlr_context *ctlr;
struct tw_cli_req_context *req;
union tw_cl_command_7k *cmd_7k;
struct tw_cl_command_9k *cmd_9k;
struct tw_cl_passthru_req_packet *pt_req;
TW_UINT8 opcode;
TW_UINT8 sgl_offset;
TW_VOID *sgl = TW_CL_NULL;
TW_INT32 error;
tw_cli_dbg_printf(5, ctlr_handle, tw_osl_cur_func(), "entered");
ctlr = (struct tw_cli_ctlr_context *)(ctlr_handle->cl_ctlr_ctxt);
if (ctlr->state & TW_CLI_CTLR_STATE_RESET_IN_PROGRESS) {
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"Passthru request during reset: returning busy. "
"Ctlr state = 0x%x",
ctlr->state);
tw_osl_ctlr_busy(ctlr_handle, req_handle);
return(TW_OSL_EBUSY);
}
if ((req = tw_cli_get_request(ctlr
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
, req_pkt
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
)) == TW_CL_NULL) {
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"Out of request context packets: returning busy");
tw_osl_ctlr_busy(ctlr_handle, req_handle);
return(TW_OSL_EBUSY);
}
req_handle->cl_req_ctxt = req;
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
req->cmd_pkt = req_pkt->dma_mem;
req->cmd_pkt_phys = req_pkt->dma_mem_phys;
tw_osl_memzero(req->cmd_pkt,
sizeof(struct tw_cl_command_header) +
28 /* max bytes before sglist */);
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
req->req_handle = req_handle;
req->orig_req = req_pkt;
req->tw_cli_callback = tw_cli_complete_io;
req->flags |= (TW_CLI_REQ_FLAGS_EXTERNAL | TW_CLI_REQ_FLAGS_PASSTHRU);
pt_req = &(req_pkt->gen_req_pkt.pt_req);
tw_osl_memcpy(req->cmd_pkt, pt_req->cmd_pkt,
pt_req->cmd_pkt_length);
/* Build the cmd pkt. */
if ((opcode = GET_OPCODE(((TW_UINT8 *)
(pt_req->cmd_pkt))[sizeof(struct tw_cl_command_header)]))
== TWA_FW_CMD_EXECUTE_SCSI) {
TW_UINT16 lun_l4, lun_h4;
tw_cli_dbg_printf(5, ctlr_handle, tw_osl_cur_func(),
"passthru: 9k cmd pkt");
req->flags |= TW_CLI_REQ_FLAGS_9K;
cmd_9k = &(req->cmd_pkt->command.cmd_pkt_9k);
lun_l4 = GET_LUN_L4(cmd_9k->lun_l4__req_id);
lun_h4 = GET_LUN_H4(cmd_9k->lun_h4__sgl_entries);
cmd_9k->lun_l4__req_id = TW_CL_SWAP16(
BUILD_LUN_L4__REQ_ID(lun_l4, req->request_id));
if (pt_req->sgl_entries) {
cmd_9k->lun_h4__sgl_entries =
TW_CL_SWAP16(BUILD_LUN_H4__SGL_ENTRIES(lun_h4,
pt_req->sgl_entries));
sgl = (TW_VOID *)(cmd_9k->sg_list);
}
} else {
tw_cli_dbg_printf(5, ctlr_handle, tw_osl_cur_func(),
"passthru: 7k cmd pkt");
cmd_7k = &(req->cmd_pkt->command.cmd_pkt_7k);
cmd_7k->generic.request_id =
(TW_UINT8)(TW_CL_SWAP16(req->request_id));
if ((sgl_offset =
GET_SGL_OFF(cmd_7k->generic.sgl_off__opcode))) {
sgl = (((TW_UINT32 *)cmd_7k) + sgl_offset);
cmd_7k->generic.size += pt_req->sgl_entries *
((ctlr->flags & TW_CL_64BIT_ADDRESSES) ? 3 : 2);
}
}
if (sgl)
tw_cli_fill_sg_list(ctlr, pt_req->sg_list,
sgl, pt_req->sgl_entries);
if ((error = tw_cli_submit_cmd(req))) {
tw_cl_create_event(ctlr_handle, TW_CL_FALSE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR,
0x1100, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Failed to start passthru command",
"error = %d", error);
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
}
return(error);
}
/*
* Function name: tw_cl_ioctl
* Description: Handler of CL supported ioctl cmds.
*
* Input: ctlr -- ptr to per ctlr structure
* cmd -- ioctl cmd
* buf -- ptr to buffer in kernel memory, which is
* a copy of the input buffer in user-space
* Output: buf -- ptr to buffer in kernel memory, which will
* need to be copied to the output buffer in
* user-space
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cl_ioctl(struct tw_cl_ctlr_handle *ctlr_handle, TW_INT32 cmd, TW_VOID *buf)
{
struct tw_cli_ctlr_context *ctlr =
(struct tw_cli_ctlr_context *)(ctlr_handle->cl_ctlr_ctxt);
struct tw_cl_ioctl_packet *user_buf =
(struct tw_cl_ioctl_packet *)buf;
struct tw_cl_event_packet event_buf;
TW_INT32 event_index;
TW_INT32 start_index;
TW_INT32 error = TW_OSL_ESUCCESS;
tw_cli_dbg_printf(5, ctlr_handle, tw_osl_cur_func(), "entered");
/* Serialize access to the AEN queue and the ioctl lock. */
tw_osl_get_lock(ctlr_handle, ctlr->gen_lock);
switch (cmd) {
case TW_CL_IOCTL_GET_FIRST_EVENT:
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get First Event");
if (ctlr->aen_q_wrapped) {
if (ctlr->aen_q_overflow) {
/*
* The aen queue has wrapped, even before some
* events have been retrieved. Let the caller
* know that he missed out on some AEN's.
*/
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_OVERFLOW;
ctlr->aen_q_overflow = TW_CL_FALSE;
} else
user_buf->driver_pkt.status = 0;
event_index = ctlr->aen_head;
} else {
if (ctlr->aen_head == ctlr->aen_tail) {
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_NO_EVENTS;
break;
}
user_buf->driver_pkt.status = 0;
event_index = ctlr->aen_tail; /* = 0 */
}
tw_osl_memcpy(user_buf->data_buf,
&(ctlr->aen_queue[event_index]),
sizeof(struct tw_cl_event_packet));
ctlr->aen_queue[event_index].retrieved = TW_CL_AEN_RETRIEVED;
break;
case TW_CL_IOCTL_GET_LAST_EVENT:
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get Last Event");
if (ctlr->aen_q_wrapped) {
if (ctlr->aen_q_overflow) {
/*
* The aen queue has wrapped, even before some
* events have been retrieved. Let the caller
* know that he missed out on some AEN's.
*/
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_OVERFLOW;
ctlr->aen_q_overflow = TW_CL_FALSE;
} else
user_buf->driver_pkt.status = 0;
} else {
if (ctlr->aen_head == ctlr->aen_tail) {
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_NO_EVENTS;
break;
}
user_buf->driver_pkt.status = 0;
}
event_index = (ctlr->aen_head - 1 + ctlr->max_aens_supported) %
ctlr->max_aens_supported;
tw_osl_memcpy(user_buf->data_buf,
&(ctlr->aen_queue[event_index]),
sizeof(struct tw_cl_event_packet));
ctlr->aen_queue[event_index].retrieved = TW_CL_AEN_RETRIEVED;
break;
case TW_CL_IOCTL_GET_NEXT_EVENT:
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get Next Event");
user_buf->driver_pkt.status = 0;
if (ctlr->aen_q_wrapped) {
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get Next Event: wrapped");
if (ctlr->aen_q_overflow) {
/*
* The aen queue has wrapped, even before some
* events have been retrieved. Let the caller
* know that he missed out on some AEN's.
*/
tw_cli_dbg_printf(2, ctlr_handle,
tw_osl_cur_func(),
"Get Next Event: overflow");
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_OVERFLOW;
ctlr->aen_q_overflow = TW_CL_FALSE;
}
start_index = ctlr->aen_head;
} else {
if (ctlr->aen_head == ctlr->aen_tail) {
tw_cli_dbg_printf(3, ctlr_handle,
tw_osl_cur_func(),
"Get Next Event: empty queue");
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_NO_EVENTS;
break;
}
start_index = ctlr->aen_tail; /* = 0 */
}
tw_osl_memcpy(&event_buf, user_buf->data_buf,
sizeof(struct tw_cl_event_packet));
event_index = (start_index + event_buf.sequence_id -
ctlr->aen_queue[start_index].sequence_id + 1) %
ctlr->max_aens_supported;
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get Next Event: si = %x, ei = %x, ebsi = %x, "
"sisi = %x, eisi = %x",
start_index, event_index, event_buf.sequence_id,
ctlr->aen_queue[start_index].sequence_id,
ctlr->aen_queue[event_index].sequence_id);
if (! (ctlr->aen_queue[event_index].sequence_id >
event_buf.sequence_id)) {
/*
* We don't have any event matching the criterion. So,
* we have to report TW_CL_ERROR_NO_EVENTS. If we also
* encountered an overflow condition above, we cannot
* report both conditions during this call. We choose
* to report NO_EVENTS this time, and an overflow the
* next time we are called.
*/
if (user_buf->driver_pkt.status ==
TW_CL_ERROR_AEN_OVERFLOW) {
/*
* Make a note so we report the overflow
* next time.
*/
ctlr->aen_q_overflow = TW_CL_TRUE;
}
user_buf->driver_pkt.status = TW_CL_ERROR_AEN_NO_EVENTS;
break;
}
/* Copy the event -- even if there has been an overflow. */
tw_osl_memcpy(user_buf->data_buf,
&(ctlr->aen_queue[event_index]),
sizeof(struct tw_cl_event_packet));
ctlr->aen_queue[event_index].retrieved = TW_CL_AEN_RETRIEVED;
break;
case TW_CL_IOCTL_GET_PREVIOUS_EVENT:
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get Previous Event");
user_buf->driver_pkt.status = 0;
if (ctlr->aen_q_wrapped) {
if (ctlr->aen_q_overflow) {
/*
* The aen queue has wrapped, even before some
* events have been retrieved. Let the caller
* know that he missed out on some AEN's.
*/
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_OVERFLOW;
ctlr->aen_q_overflow = TW_CL_FALSE;
}
start_index = ctlr->aen_head;
} else {
if (ctlr->aen_head == ctlr->aen_tail) {
user_buf->driver_pkt.status =
TW_CL_ERROR_AEN_NO_EVENTS;
break;
}
start_index = ctlr->aen_tail; /* = 0 */
}
tw_osl_memcpy(&event_buf, user_buf->data_buf,
sizeof(struct tw_cl_event_packet));
event_index = (start_index + event_buf.sequence_id -
ctlr->aen_queue[start_index].sequence_id - 1) %
ctlr->max_aens_supported;
if (! (ctlr->aen_queue[event_index].sequence_id <
event_buf.sequence_id)) {
/*
* We don't have any event matching the criterion. So,
* we have to report TW_CL_ERROR_NO_EVENTS. If we also
* encountered an overflow condition above, we cannot
* report both conditions during this call. We choose
* to report NO_EVENTS this time, and an overflow the
* next time we are called.
*/
if (user_buf->driver_pkt.status ==
TW_CL_ERROR_AEN_OVERFLOW) {
/*
* Make a note so we report the overflow
* next time.
*/
ctlr->aen_q_overflow = TW_CL_TRUE;
}
user_buf->driver_pkt.status = TW_CL_ERROR_AEN_NO_EVENTS;
break;
}
/* Copy the event -- even if there has been an overflow. */
tw_osl_memcpy(user_buf->data_buf,
&(ctlr->aen_queue[event_index]),
sizeof(struct tw_cl_event_packet));
ctlr->aen_queue[event_index].retrieved = TW_CL_AEN_RETRIEVED;
break;
case TW_CL_IOCTL_GET_LOCK:
{
struct tw_cl_lock_packet lock_pkt;
TW_TIME cur_time;
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get ioctl lock");
cur_time = tw_osl_get_local_time();
tw_osl_memcpy(&lock_pkt, user_buf->data_buf,
sizeof(struct tw_cl_lock_packet));
if ((ctlr->ioctl_lock.lock == TW_CLI_LOCK_FREE) ||
(lock_pkt.force_flag) ||
(cur_time >= ctlr->ioctl_lock.timeout)) {
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"GET_LOCK: Getting lock!");
ctlr->ioctl_lock.lock = TW_CLI_LOCK_HELD;
ctlr->ioctl_lock.timeout =
cur_time + (lock_pkt.timeout_msec / 1000);
lock_pkt.time_remaining_msec = lock_pkt.timeout_msec;
user_buf->driver_pkt.status = 0;
} else {
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"GET_LOCK: Lock already held!");
lock_pkt.time_remaining_msec = (TW_UINT32)(
(ctlr->ioctl_lock.timeout - cur_time) * 1000);
user_buf->driver_pkt.status =
TW_CL_ERROR_IOCTL_LOCK_ALREADY_HELD;
}
tw_osl_memcpy(user_buf->data_buf, &lock_pkt,
sizeof(struct tw_cl_lock_packet));
break;
}
case TW_CL_IOCTL_RELEASE_LOCK:
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Release ioctl lock");
if (ctlr->ioctl_lock.lock == TW_CLI_LOCK_FREE) {
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"twa_ioctl: RELEASE_LOCK: Lock not held!");
user_buf->driver_pkt.status =
TW_CL_ERROR_IOCTL_LOCK_NOT_HELD;
} else {
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"RELEASE_LOCK: Releasing lock!");
ctlr->ioctl_lock.lock = TW_CLI_LOCK_FREE;
user_buf->driver_pkt.status = 0;
}
break;
case TW_CL_IOCTL_GET_COMPATIBILITY_INFO:
{
struct tw_cl_compatibility_packet comp_pkt;
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Get compatibility info");
tw_osl_memcpy(comp_pkt.driver_version,
TW_OSL_DRIVER_VERSION_STRING,
sizeof(TW_OSL_DRIVER_VERSION_STRING));
comp_pkt.working_srl = ctlr->working_srl;
comp_pkt.working_branch = ctlr->working_branch;
comp_pkt.working_build = ctlr->working_build;
comp_pkt.driver_srl_high = TWA_CURRENT_FW_SRL;
comp_pkt.driver_branch_high =
TWA_CURRENT_FW_BRANCH(ctlr->arch_id);
comp_pkt.driver_build_high =
TWA_CURRENT_FW_BUILD(ctlr->arch_id);
comp_pkt.driver_srl_low = TWA_BASE_FW_SRL;
comp_pkt.driver_branch_low = TWA_BASE_FW_BRANCH;
comp_pkt.driver_build_high = TWA_BASE_FW_BUILD;
comp_pkt.fw_on_ctlr_srl = ctlr->fw_on_ctlr_srl;
comp_pkt.fw_on_ctlr_branch = ctlr->fw_on_ctlr_branch;
comp_pkt.fw_on_ctlr_build = ctlr->fw_on_ctlr_build;
user_buf->driver_pkt.status = 0;
/* Copy compatibility information to user space. */
tw_osl_memcpy(user_buf->data_buf, &comp_pkt,
(sizeof(struct tw_cl_compatibility_packet) <
user_buf->driver_pkt.buffer_length) ?
sizeof(struct tw_cl_compatibility_packet) :
user_buf->driver_pkt.buffer_length);
break;
}
default:
/* Unknown opcode. */
tw_cli_dbg_printf(3, ctlr_handle, tw_osl_cur_func(),
"Unknown ioctl cmd 0x%x", cmd);
error = TW_OSL_ENOTTY;
}
tw_osl_free_lock(ctlr_handle, ctlr->gen_lock);
return(error);
}
/*
* Function name: tw_cli_get_param
* Description: Get a firmware parameter.
*
* Input: ctlr -- ptr to per ctlr structure
* table_id -- parameter table #
* param_id -- index of the parameter in the table
* param_size -- size of the parameter in bytes
* callback -- ptr to function, if any, to be called
* back on completion; TW_CL_NULL if no callback.
* Output: param_data -- param value
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cli_get_param(struct tw_cli_ctlr_context *ctlr, TW_INT32 table_id,
TW_INT32 param_id, TW_VOID *param_data, TW_INT32 param_size,
TW_VOID (* callback)(struct tw_cli_req_context *req))
{
struct tw_cli_req_context *req;
union tw_cl_command_7k *cmd;
struct tw_cl_param_9k *param = TW_CL_NULL;
TW_INT32 error = TW_OSL_EBUSY;
tw_cli_dbg_printf(4, ctlr->ctlr_handle, tw_osl_cur_func(), "entered");
/* Get a request packet. */
if ((req = tw_cli_get_request(ctlr
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
, TW_CL_NULL
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
)) == TW_CL_NULL)
goto out;
/* Make sure this is the only CL internal request at this time. */
if (ctlr->state & TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY) {
error = TW_OSL_EBUSY;
goto out;
}
ctlr->state |= TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
req->cmd_pkt = ctlr->cmd_pkt_buf;
req->cmd_pkt_phys = ctlr->cmd_pkt_phys;
tw_osl_memzero(req->cmd_pkt,
sizeof(struct tw_cl_command_header) +
28 /* max bytes before sglist */);
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
req->data = ctlr->internal_req_data;
req->data_phys = ctlr->internal_req_data_phys;
req->length = TW_CLI_SECTOR_SIZE;
req->flags |= TW_CLI_REQ_FLAGS_INTERNAL;
/* Initialize memory to read data into. */
param = (struct tw_cl_param_9k *)(req->data);
tw_osl_memzero(param, sizeof(struct tw_cl_param_9k) - 1 + param_size);
/* Build the cmd pkt. */
cmd = &(req->cmd_pkt->command.cmd_pkt_7k);
req->cmd_pkt->cmd_hdr.header_desc.size_header = 128;
cmd->param.sgl_off__opcode =
BUILD_SGL_OFF__OPCODE(2, TWA_FW_CMD_GET_PARAM);
cmd->param.request_id =
(TW_UINT8)(TW_CL_SWAP16(req->request_id));
cmd->param.host_id__unit = BUILD_HOST_ID__UNIT(0, 0);
cmd->param.param_count = TW_CL_SWAP16(1);
if (ctlr->flags & TW_CL_64BIT_ADDRESSES) {
((struct tw_cl_sg_desc64 *)(cmd->param.sgl))[0].address =
TW_CL_SWAP64(req->data_phys);
((struct tw_cl_sg_desc64 *)(cmd->param.sgl))[0].length =
TW_CL_SWAP32(req->length);
cmd->param.size = 2 + 3;
} else {
((struct tw_cl_sg_desc32 *)(cmd->param.sgl))[0].address =
TW_CL_SWAP32(req->data_phys);
((struct tw_cl_sg_desc32 *)(cmd->param.sgl))[0].length =
TW_CL_SWAP32(req->length);
cmd->param.size = 2 + 2;
}
/* Specify which parameter we need. */
param->table_id = TW_CL_SWAP16(table_id | TWA_9K_PARAM_DESCRIPTOR);
param->parameter_id = (TW_UINT8)(param_id);
param->parameter_size_bytes = TW_CL_SWAP16(param_size);
/* Submit the command. */
if (callback == TW_CL_NULL) {
/* There's no call back; wait till the command completes. */
error = tw_cli_submit_and_poll_request(req,
TW_CLI_REQUEST_TIMEOUT_PERIOD);
if (error == TW_OSL_ETIMEDOUT)
/* Clean-up done by tw_cli_submit_and_poll_request. */
return(error);
if (error)
goto out;
if ((error = cmd->param.status)) {
tw_cli_create_ctlr_event(ctlr,
TW_CL_MESSAGE_SOURCE_CONTROLLER_ERROR,
&(req->cmd_pkt->cmd_hdr));
goto out;
}
tw_osl_memcpy(param_data, param->data, param_size);
ctlr->state &= ~TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
} else {
/* There's a call back. Simply submit the command. */
req->tw_cli_callback = callback;
if ((error = tw_cli_submit_cmd(req)))
goto out;
}
return(0);
out:
tw_cl_create_event(ctlr->ctlr_handle, TW_CL_FALSE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR,
0x1101, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"get_param failed",
"error = %d", error);
if (param)
ctlr->state &= ~TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
if (req)
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
return(1);
}
/*
* Function name: tw_cli_set_param
* Description: Set a firmware parameter.
*
* Input: ctlr -- ptr to per ctlr structure
* table_id -- parameter table #
* param_id -- index of the parameter in the table
* param_size -- size of the parameter in bytes
* callback -- ptr to function, if any, to be called
* back on completion; TW_CL_NULL if no callback.
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cli_set_param(struct tw_cli_ctlr_context *ctlr, TW_INT32 table_id,
TW_INT32 param_id, TW_INT32 param_size, TW_VOID *data,
TW_VOID (* callback)(struct tw_cli_req_context *req))
{
struct tw_cli_req_context *req;
union tw_cl_command_7k *cmd;
struct tw_cl_param_9k *param = TW_CL_NULL;
TW_INT32 error = TW_OSL_EBUSY;
tw_cli_dbg_printf(4, ctlr->ctlr_handle, tw_osl_cur_func(), "entered");
/* Get a request packet. */
if ((req = tw_cli_get_request(ctlr
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
, TW_CL_NULL
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
)) == TW_CL_NULL)
goto out;
/* Make sure this is the only CL internal request at this time. */
if (ctlr->state & TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY) {
error = TW_OSL_EBUSY;
goto out;
}
ctlr->state |= TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
req->cmd_pkt = ctlr->cmd_pkt_buf;
req->cmd_pkt_phys = ctlr->cmd_pkt_phys;
tw_osl_memzero(req->cmd_pkt,
sizeof(struct tw_cl_command_header) +
28 /* max bytes before sglist */);
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
req->data = ctlr->internal_req_data;
req->data_phys = ctlr->internal_req_data_phys;
req->length = TW_CLI_SECTOR_SIZE;
req->flags |= TW_CLI_REQ_FLAGS_INTERNAL;
/* Initialize memory to send data using. */
param = (struct tw_cl_param_9k *)(req->data);
tw_osl_memzero(param, sizeof(struct tw_cl_param_9k) - 1 + param_size);
/* Build the cmd pkt. */
cmd = &(req->cmd_pkt->command.cmd_pkt_7k);
req->cmd_pkt->cmd_hdr.header_desc.size_header = 128;
cmd->param.sgl_off__opcode =
BUILD_SGL_OFF__OPCODE(2, TWA_FW_CMD_SET_PARAM);
cmd->param.request_id = (TW_UINT8)(TW_CL_SWAP16(req->request_id));
cmd->param.host_id__unit = BUILD_HOST_ID__UNIT(0, 0);
cmd->param.param_count = TW_CL_SWAP16(1);
if (ctlr->flags & TW_CL_64BIT_ADDRESSES) {
((struct tw_cl_sg_desc64 *)(cmd->param.sgl))[0].address =
TW_CL_SWAP64(req->data_phys);
((struct tw_cl_sg_desc64 *)(cmd->param.sgl))[0].length =
TW_CL_SWAP32(req->length);
cmd->param.size = 2 + 3;
} else {
((struct tw_cl_sg_desc32 *)(cmd->param.sgl))[0].address =
TW_CL_SWAP32(req->data_phys);
((struct tw_cl_sg_desc32 *)(cmd->param.sgl))[0].length =
TW_CL_SWAP32(req->length);
cmd->param.size = 2 + 2;
}
/* Specify which parameter we want to set. */
param->table_id = TW_CL_SWAP16(table_id | TWA_9K_PARAM_DESCRIPTOR);
param->parameter_id = (TW_UINT8)(param_id);
param->parameter_size_bytes = TW_CL_SWAP16(param_size);
tw_osl_memcpy(param->data, data, param_size);
/* Submit the command. */
if (callback == TW_CL_NULL) {
/* There's no call back; wait till the command completes. */
error = tw_cli_submit_and_poll_request(req,
TW_CLI_REQUEST_TIMEOUT_PERIOD);
if (error == TW_OSL_ETIMEDOUT)
/* Clean-up done by tw_cli_submit_and_poll_request. */
return(error);
if (error)
goto out;
if ((error = cmd->param.status)) {
tw_cli_create_ctlr_event(ctlr,
TW_CL_MESSAGE_SOURCE_CONTROLLER_ERROR,
&(req->cmd_pkt->cmd_hdr));
goto out;
}
ctlr->state &= ~TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
} else {
/* There's a call back. Simply submit the command. */
req->tw_cli_callback = callback;
if ((error = tw_cli_submit_cmd(req)))
goto out;
}
return(error);
out:
tw_cl_create_event(ctlr->ctlr_handle, TW_CL_FALSE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR,
0x1102, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"set_param failed",
"error = %d", error);
if (param)
ctlr->state &= ~TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
if (req)
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
return(error);
}
/*
* Function name: tw_cli_submit_and_poll_request
* Description: Sends down a firmware cmd, and waits for the completion
* in a tight loop.
*
* Input: req -- ptr to request pkt
* timeout -- max # of seconds to wait before giving up
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cli_submit_and_poll_request(struct tw_cli_req_context *req,
TW_UINT32 timeout)
{
struct tw_cli_ctlr_context *ctlr = req->ctlr;
TW_TIME end_time;
TW_INT32 error;
tw_cli_dbg_printf(4, ctlr->ctlr_handle, tw_osl_cur_func(), "entered");
/*
* If the cmd queue is full, tw_cli_submit_cmd will queue this
* request in the pending queue, since this is an internal request.
*/
if ((error = tw_cli_submit_cmd(req))) {
tw_cl_create_event(ctlr->ctlr_handle, TW_CL_FALSE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR,
0x1103, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Failed to start internal request",
"error = %d", error);
return(error);
}
/*
* Poll for the response until the command gets completed, or there's
* a timeout.
*/
end_time = tw_osl_get_local_time() + timeout;
do {
if ((error = req->error_code))
/*
* This will take care of completion due to a reset,
* or a failure in tw_cli_submit_pending_queue.
* The caller should do the clean-up.
*/
return(error);
/* See if the command completed. */
tw_cli_process_resp_intr(ctlr);
if ((req->state != TW_CLI_REQ_STATE_BUSY) &&
(req->state != TW_CLI_REQ_STATE_PENDING))
return(req->state != TW_CLI_REQ_STATE_COMPLETE);
} while (tw_osl_get_local_time() <= end_time);
/* Time out! */
tw_cl_create_event(ctlr->ctlr_handle, TW_CL_FALSE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR,
0x1104, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Internal request timed out",
"request = %p", req);
/*
* We will reset the controller only if the request has already been
* submitted, so as to not lose the request packet. If a busy request
* timed out, the reset will take care of freeing resources. If a
* pending request timed out, we will free resources for that request,
* right here, thereby avoiding a reset. So, the caller is expected
* to NOT cleanup when TW_OSL_ETIMEDOUT is returned.
*/
/*
* We have to make sure that this timed out request, if it were in the
* pending queue, doesn't get submitted while we are here, from
* tw_cli_submit_pending_queue. There could be a race in that case.
* Need to revisit.
*/
if (req->state != TW_CLI_REQ_STATE_PENDING)
tw_cl_reset_ctlr(ctlr->ctlr_handle);
else {
tw_cli_dbg_printf(3, ctlr->ctlr_handle, tw_osl_cur_func(),
"Removing request from pending queue");
/*
* Request was never submitted. Clean up. Note that we did
* not do a reset. So, we have to remove the request ourselves
* from the pending queue (as against tw_cli_drain_pendinq_queue
* taking care of it).
*/
tw_cli_req_q_remove_item(req, TW_CLI_PENDING_Q);
if (req->data)
ctlr->state &= ~TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
}
return(TW_OSL_ETIMEDOUT);
}
/*
* Function name: tw_cl_reset_ctlr
* Description: Soft resets and then initializes the controller;
* drains any incomplete requests.
*
* Input: ctlr -- ptr to per ctlr structure
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cl_reset_ctlr(struct tw_cl_ctlr_handle *ctlr_handle)
{
struct tw_cli_ctlr_context *ctlr =
(struct tw_cli_ctlr_context *)(ctlr_handle->cl_ctlr_ctxt);
TW_INT32 reset_attempt = 1;
TW_INT32 error;
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(), "entered");
ctlr->state |= TW_CLI_CTLR_STATE_RESET_IN_PROGRESS;
/*
* Error back all requests in the complete, busy, and pending queues.
* If any request is already on its way to getting submitted, it's in
* none of these queues and so, will not be completed. That request
* will continue its course and get submitted to the controller after
* the reset is done (and io_lock is released).
*/
tw_cli_dbg_printf(2, ctlr_handle, tw_osl_cur_func(),
"Draining all queues following reset");
tw_cli_drain_complete_queue(ctlr);
tw_cli_drain_busy_queue(ctlr);
tw_cli_drain_pending_queue(ctlr);
tw_cli_disable_interrupts(ctlr);
/* Soft reset the controller. */
try_reset:
if ((error = tw_cli_soft_reset(ctlr))) {
tw_cl_create_event(ctlr_handle, TW_CL_TRUE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT,
0x1105, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Controller reset failed",
"error = %d; attempt %d", error, reset_attempt++);
if (reset_attempt <= TW_CLI_MAX_RESET_ATTEMPTS)
goto try_reset;
else
goto out;
}
/* Re-establish logical connection with the controller. */
if ((error = tw_cli_init_connection(ctlr,
(TW_UINT16)(ctlr->max_simult_reqs),
0, 0, 0, 0, 0, TW_CL_NULL, TW_CL_NULL, TW_CL_NULL,
TW_CL_NULL, TW_CL_NULL))) {
tw_cl_create_event(ctlr_handle, TW_CL_TRUE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT,
0x1106, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Can't initialize connection after reset",
"error = %d", error);
goto out;
}
tw_cl_create_event(ctlr_handle, TW_CL_TRUE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT,
0x1107, 0x3, TW_CL_SEVERITY_INFO_STRING,
"Controller reset done!",
" ");
out:
ctlr->state &= ~TW_CLI_CTLR_STATE_RESET_IN_PROGRESS;
/*
* Enable interrupts, and also clear attention and response interrupts.
*/
tw_cli_enable_interrupts(ctlr);
/* Request for a bus re-scan. */
if (!error)
tw_osl_scan_bus(ctlr_handle);
return(error);
}
/*
* Function name: tw_cli_soft_reset
* Description: Does the actual soft reset.
*
* Input: ctlr -- ptr to per ctlr structure
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cli_soft_reset(struct tw_cli_ctlr_context *ctlr)
{
struct tw_cl_ctlr_handle *ctlr_handle = ctlr->ctlr_handle;
TW_UINT32 status_reg;
TW_UINT32 error;
tw_cli_dbg_printf(1, ctlr_handle, tw_osl_cur_func(), "entered");
tw_cl_create_event(ctlr_handle, TW_CL_TRUE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT,
0x1108, 0x3, TW_CL_SEVERITY_INFO_STRING,
"Resetting controller...",
" ");
/* Don't let any new commands get submitted to the controller. */
tw_osl_get_lock(ctlr_handle, ctlr->io_lock);
TW_CLI_SOFT_RESET(ctlr_handle);
if (ctlr->device_id == TW_CL_DEVICE_ID_9K_X) {
/*
* There's a hardware bug in the G133 ASIC, which can lead to
* PCI parity errors and hangs, if the host accesses any
* registers when the firmware is resetting the hardware, as
* part of a hard/soft reset. The window of time when the
* problem can occur is about 10 ms. Here, we will handshake
* with the firmware to find out when the firmware is pulling
* down the hardware reset pin, and wait for about 500 ms to
* make sure we don't access any hardware registers (for
* polling) during that window.
*/
ctlr->state |= TW_CLI_CTLR_STATE_RESET_PHASE1_IN_PROGRESS;
while (tw_cli_find_response(ctlr,
TWA_RESET_PHASE1_NOTIFICATION_RESPONSE) != TW_OSL_ESUCCESS)
tw_osl_delay(10);
tw_osl_delay(TWA_RESET_PHASE1_WAIT_TIME_MS * 1000);
ctlr->state &= ~TW_CLI_CTLR_STATE_RESET_PHASE1_IN_PROGRESS;
}
if ((error = tw_cli_poll_status(ctlr,
TWA_STATUS_MICROCONTROLLER_READY |
TWA_STATUS_ATTENTION_INTERRUPT,
TW_CLI_RESET_TIMEOUT_PERIOD))) {
tw_cl_create_event(ctlr_handle, TW_CL_TRUE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT,
0x1109, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Micro-ctlr not ready/No attn intr after reset",
"error = %d", error);
tw_osl_free_lock(ctlr_handle, ctlr->io_lock);
return(error);
}
TW_CLI_WRITE_CONTROL_REGISTER(ctlr_handle,
TWA_CONTROL_CLEAR_ATTENTION_INTERRUPT);
if ((error = tw_cli_drain_response_queue(ctlr))) {
tw_cl_create_event(ctlr_handle, TW_CL_FALSE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR,
0x110A, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Can't drain response queue after reset",
"error = %d", error);
tw_osl_free_lock(ctlr_handle, ctlr->io_lock);
return(error);
}
tw_osl_free_lock(ctlr_handle, ctlr->io_lock);
if ((error = tw_cli_drain_aen_queue(ctlr))) {
tw_cl_create_event(ctlr_handle, TW_CL_FALSE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_ERROR,
0x110B, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Can't drain AEN queue after reset",
"error = %d", error);
return(error);
}
if ((error = tw_cli_find_aen(ctlr, TWA_AEN_SOFT_RESET))) {
tw_cl_create_event(ctlr_handle, TW_CL_TRUE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT,
0x110C, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Reset not reported by controller",
"error = %d", error);
return(error);
}
status_reg = TW_CLI_READ_STATUS_REGISTER(ctlr_handle);
if ((error = TW_CLI_STATUS_ERRORS(status_reg)) ||
(error = tw_cli_check_ctlr_state(ctlr, status_reg))) {
tw_cl_create_event(ctlr_handle, TW_CL_TRUE,
TW_CL_MESSAGE_SOURCE_COMMON_LAYER_EVENT,
0x110D, 0x1, TW_CL_SEVERITY_ERROR_STRING,
"Controller errors detected after reset",
"error = %d", error);
return(error);
}
return(TW_OSL_ESUCCESS);
}
/*
* Function name: tw_cli_send_scsi_cmd
* Description: Sends down a scsi cmd to fw.
*
* Input: req -- ptr to request pkt
* cmd -- opcode of scsi cmd to send
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cli_send_scsi_cmd(struct tw_cli_req_context *req, TW_INT32 cmd)
{
struct tw_cl_command_packet *cmdpkt;
struct tw_cl_command_9k *cmd9k;
struct tw_cli_ctlr_context *ctlr;
TW_INT32 error;
ctlr = req->ctlr;
tw_cli_dbg_printf(4, ctlr->ctlr_handle, tw_osl_cur_func(), "entered");
/* Make sure this is the only CL internal request at this time. */
if (ctlr->state & TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY)
return(TW_OSL_EBUSY);
ctlr->state |= TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
req->data = ctlr->internal_req_data;
req->data_phys = ctlr->internal_req_data_phys;
tw_osl_memzero(req->data, TW_CLI_SECTOR_SIZE);
req->length = TW_CLI_SECTOR_SIZE;
/* Build the cmd pkt. */
cmdpkt = req->cmd_pkt;
cmdpkt->cmd_hdr.header_desc.size_header = 128;
cmd9k = &(cmdpkt->command.cmd_pkt_9k);
cmd9k->res__opcode =
BUILD_RES__OPCODE(0, TWA_FW_CMD_EXECUTE_SCSI);
cmd9k->unit = 0;
cmd9k->lun_l4__req_id = TW_CL_SWAP16(req->request_id);
cmd9k->status = 0;
cmd9k->sgl_offset = 16; /* offset from end of hdr = max cdb len */
cmd9k->lun_h4__sgl_entries = TW_CL_SWAP16(1);
if (req->ctlr->flags & TW_CL_64BIT_ADDRESSES) {
((struct tw_cl_sg_desc64 *)(cmd9k->sg_list))[0].address =
TW_CL_SWAP64(req->data_phys);
((struct tw_cl_sg_desc64 *)(cmd9k->sg_list))[0].length =
TW_CL_SWAP32(req->length);
} else {
((struct tw_cl_sg_desc32 *)(cmd9k->sg_list))[0].address =
TW_CL_SWAP32(req->data_phys);
((struct tw_cl_sg_desc32 *)(cmd9k->sg_list))[0].length =
TW_CL_SWAP32(req->length);
}
cmd9k->cdb[0] = (TW_UINT8)cmd;
cmd9k->cdb[4] = 128;
if ((error = tw_cli_submit_cmd(req)))
if (error != TW_OSL_EBUSY) {
tw_cli_dbg_printf(1, ctlr->ctlr_handle,
tw_osl_cur_func(),
"Failed to start SCSI command",
"request = %p, error = %d", req, error);
return(TW_OSL_EIO);
}
return(TW_OSL_ESUCCESS);
}
/*
* Function name: tw_cli_get_aen
* Description: Sends down a Request Sense cmd to fw to fetch an AEN.
*
* Input: ctlr -- ptr to per ctlr structure
* Output: None
* Return value: 0 -- success
* non-zero-- failure
*/
TW_INT32
tw_cli_get_aen(struct tw_cli_ctlr_context *ctlr)
{
struct tw_cli_req_context *req;
TW_INT32 error;
tw_cli_dbg_printf(4, ctlr->ctlr_handle, tw_osl_cur_func(), "entered");
if ((req = tw_cli_get_request(ctlr
#ifdef TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST
, TW_CL_NULL
#endif /* TW_OSL_NON_DMA_MEM_ALLOC_PER_REQUEST */
)) == TW_CL_NULL)
return(TW_OSL_EBUSY);
#ifdef TW_OSL_DMA_MEM_ALLOC_PER_REQUEST
req->cmd_pkt = ctlr->cmd_pkt_buf;
req->cmd_pkt_phys = ctlr->cmd_pkt_phys;
tw_osl_memzero(req->cmd_pkt,
sizeof(struct tw_cl_command_header) +
28 /* max bytes before sglist */);
#endif /* TW_OSL_DMA_MEM_ALLOC_PER_REQUEST */
req->flags |= TW_CLI_REQ_FLAGS_INTERNAL;
req->flags |= TW_CLI_REQ_FLAGS_9K;
req->tw_cli_callback = tw_cli_aen_callback;
if ((error = tw_cli_send_scsi_cmd(req, 0x03 /* REQUEST_SENSE */))) {
tw_cli_dbg_printf(1, ctlr->ctlr_handle, tw_osl_cur_func(),
"Could not send SCSI command",
"request = %p, error = %d", req, error);
if (req->data)
ctlr->state &= ~TW_CLI_CTLR_STATE_INTERNAL_REQ_BUSY;
tw_cli_req_q_insert_tail(req, TW_CLI_FREE_Q);
}
return(error);
}
/*
* Function name: tw_cli_fill_sg_list
* Description: Fills in the scatter/gather list.
*
* Input: ctlr -- ptr to per ctlr structure
* sgl_src -- ptr to fill the sg list from
* sgl_dest-- ptr to sg list
* nsegments--# of segments
* Output: None
* Return value: None
*/
TW_VOID
tw_cli_fill_sg_list(struct tw_cli_ctlr_context *ctlr, TW_VOID *sgl_src,
TW_VOID *sgl_dest, TW_INT32 num_sgl_entries)
{
TW_INT32 i;
tw_cli_dbg_printf(10, ctlr->ctlr_handle, tw_osl_cur_func(), "entered");
if (ctlr->flags & TW_CL_64BIT_ADDRESSES) {
struct tw_cl_sg_desc64 *sgl_s =
(struct tw_cl_sg_desc64 *)sgl_src;
struct tw_cl_sg_desc64 *sgl_d =
(struct tw_cl_sg_desc64 *)sgl_dest;
tw_cli_dbg_printf(10, ctlr->ctlr_handle, tw_osl_cur_func(),
"64 bit addresses");
for (i = 0; i < num_sgl_entries; i++) {
sgl_d[i].address = TW_CL_SWAP64(sgl_s->address);
sgl_d[i].length = TW_CL_SWAP32(sgl_s->length);
sgl_s++;
if (ctlr->flags & TW_CL_64BIT_SG_LENGTH)
sgl_s = (struct tw_cl_sg_desc64 *)
(((TW_INT8 *)(sgl_s)) + 4);
}
} else {
struct tw_cl_sg_desc32 *sgl_s =
(struct tw_cl_sg_desc32 *)sgl_src;
struct tw_cl_sg_desc32 *sgl_d =
(struct tw_cl_sg_desc32 *)sgl_dest;
tw_cli_dbg_printf(10, ctlr->ctlr_handle, tw_osl_cur_func(),
"32 bit addresses");
for (i = 0; i < num_sgl_entries; i++) {
sgl_d[i].address = TW_CL_SWAP32(sgl_s[i].address);
sgl_d[i].length = TW_CL_SWAP32(sgl_s[i].length);
}
}
}
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