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Message-ID: <20080217024327.d5a49cac@mailhost.serverengines.com>
Date: Sat, 16 Feb 2008 18:43:27 -0800
From: "Subbu Seetharaman" <subbus@...verengines.com>
To: netdev@...r.kernel.org
Subject: [PATHCH 8/16] ServerEngines 10Gb NIC driver
Event queue, completion queue and management
processor ring creation functions in
beclib.
--------------------------------
diff -uprN orig/linux-2.6.24.2/drivers/message/beclib/eq_ll.c benet/linux-2.6.24.2/drivers/message/beclib/eq_ll.c
--- orig/linux-2.6.24.2/drivers/message/beclib/eq_ll.c 1970-01-01 05:30:00.000000000 +0530
+++ benet/linux-2.6.24.2/drivers/message/beclib/eq_ll.c 2008-02-14 15:23:07.809205584 +0530
@@ -0,0 +1,751 @@
+/*
+ * Copyright (C) 2005 - 2008 ServerEngines
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or at your option any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, 5th Floor
+ * Boston, MA 02110-1301 USA
+ *
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called GPL.
+ *
+ * Contact Information:
+ * linux-drivers@...verengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ *
+ */
+#include "pch.h"
+
+/*
+ *============================================================================
+ * F I L E S C O P E
+ *============================================================================
+ */
+
+/*!
+
+@...ef
+ This routine serializes access to resources maintained through an EQ object.
+
+@...am
+ eq_object - The event queue object to acquire the lock for.
+
+@...urn
+
+@...e
+ IRQL < DISPATCH_LEVEL
+
+*/
+
+STATIC void _be_eq_lock(IN PBE_EQ_OBJECT eq_object)
+{
+ SA_NOT_USED(eq_object);
+ /*
+ * BUG - Work around storport driver dispatch issues.
+ *SA_ASSERT_BLOCKING ();
+ *be_lock_acquire (&eq_object->lock);
+ */
+}
+
+/*!
+
+@...ef
+ This routine removes serialization done by EqObjectLock.
+@...am
+ eq_object - the event queue object to drop the lock for.
+@...urn
+@...e
+ IRQL < DISPATCH_LEVEL
+*/
+STATIC void _be_eq_unlock(IN PBE_EQ_OBJECT eq_object)
+{
+ SA_NOT_USED(eq_object);
+ /*be_lock_release (&eq_object->lock); */
+}
+
+STATIC
+ INLINE
+ PBE_EQ_OBJECT
+_be_eq_id_to_object(IN PBE_FUNCTION_OBJECT function_object, IN u32 eq_id)
+{
+ PBE_EQ_OBJECT eq_cur;
+ PBE_EQ_OBJECT eq_ret = NULL;
+
+ _be_function_lock(function_object);
+
+ SA_FOR_EACH_LIST_ENTRY(eq_cur, function_object->links.eq_list_head,
+ BE_EQ_OBJECT, eq_list) {
+ if (be_eq_get_id(eq_cur) == eq_id) {
+
+ eq_ret = eq_cur;
+ break;
+ }
+ }
+
+ _be_function_unlock(function_object);
+
+ return eq_ret;
+}
+
+/*
+ *============================================================================
+ * P U B L I C R O U T I N E S
+ *============================================================================
+ */
+
+/*!
+
+@...ef
+ This routine creates an event queue based on the client completion
+ queue configuration information.
+
+@...am
+ FunctionObject - Handle to a function object
+@...am
+ EqBaseVa - Base VA for a the EQ ring
+@...am
+ SizeEncoding - The encoded size for the EQ entries. This value is
+ either CEV_EQ_SIZE_4 or CEV_EQ_SIZE_16
+@...am
+ NumEntries - CEV_CQ_CNT_* values.
+@...am
+ Watermark - Enables watermark based coalescing. This parameter
+ must be of the type CEV_WMARK_* if watermarks
+ are enabled. If watermarks to to be disabled
+ this value should be-1.
+@...am
+ TimerDelay - If a timer delay is enabled this value should be the
+ time of the delay in 8 microsecond units. If
+ delays are not used this parameter should be
+ set to -1.
+@...am
+ ppEqObject - Internal EQ Handle returned.
+
+@...urn
+ BE_SUCCESS if successfull,, otherwise a useful error code is returned.
+
+@...e
+ IRQL < DISPATCH_LEVEL
+
+ If the FunctionObject represents an ISCSI function, then the EQID
+ returned will be between 0-31.
+*/
+BESTATUS be_eq_create_internal(PBE_FUNCTION_OBJECT function_object,
+ PSA_SGL sgl, u32 eqe_size, u32 num_entries,
+ u32 watermark, /* CEV_WMARK_* or -1 */
+ u32 timer_delay, /* in 8us units, or -1 */
+ boolean fake_eq, PBE_EQ_OBJECT eq_object)
+{
+ BESTATUS status = BE_SUCCESS;
+ u32 num_entries_encoding, eqe_size_encoding, length;
+ IOCTL_COMMON_EQ_CREATE *ioctl = NULL;
+ MCC_WRB *wrb = NULL;
+
+ ASSERT(sgl);
+ ASSERT(eq_object);
+
+ FUNCTION_ASSERT(function_object);
+
+ /*
+ * To avoid assuming the enumeration values are constant,
+ * I'm using a switch statement instead of calculating this
+ * with sa_log2.
+ */
+ switch (num_entries) {
+ case 256:
+ num_entries_encoding = CEV_EQ_CNT_256;
+ break;
+ case 512:
+ num_entries_encoding = CEV_EQ_CNT_512;
+ break;
+ case 1024:
+ num_entries_encoding = CEV_EQ_CNT_1024;
+ break;
+ case 2048:
+ num_entries_encoding = CEV_EQ_CNT_2048;
+ break;
+ case 4096:
+ num_entries_encoding = CEV_EQ_CNT_4096;
+ break;
+ default:
+ ASSERT(0);
+ return BE_STATUS_INVALID_PARAMETER;
+ }
+
+ /*
+ * To avoid assuming the enumeration values are constant,
+ * I'm using a switch statement instead of calculating
+ * this with sa_log2.
+ */
+ switch (eqe_size) {
+ case 4:
+ eqe_size_encoding = CEV_EQ_SIZE_4;
+ break;
+ case 16:
+ eqe_size_encoding = CEV_EQ_SIZE_16;
+ break;
+ default:
+ ASSERT(0);
+ return BE_STATUS_INVALID_PARAMETER;
+ }
+
+ if ((eqe_size == 4 && num_entries < 1024) ||
+ (eqe_size == 16 && num_entries == 4096)) {
+ TRACE(DL_ERR, "Bad EQ size. eqe_size:%d num_entries:%d",
+ eqe_size, num_entries);
+ ASSERT(0);
+ return BE_STATUS_INVALID_PARAMETER;
+ }
+
+ sa_zero_mem(eq_object, sizeof(*eq_object));
+
+ eq_object->magic = BE_EQ_MAGIC;
+ eq_object->ref_count = 0;
+ eq_object->parent_function = function_object;
+ eq_object->eq_id = 0xFFFFFFFF;
+
+ be_lock_init(&eq_object->lock);
+
+ sa_initialize_list_head(&eq_object->cq_list_head);
+
+ length = num_entries * eqe_size;
+
+ be_lock_wrb_post(function_object);
+
+ wrb = be_function_peek_mcc_wrb(function_object);
+ if (!wrb) {
+ ASSERT(wrb);
+ TRACE(DL_ERR, "No free MCC WRBs in create EQ.");
+ status = BE_STATUS_NO_MCC_WRB;
+ goto Error;
+ }
+ /* Prepares an embedded ioctl, including request/response sizes. */
+ ioctl =
+ BE_FUNCTION_PREPARE_EMBEDDED_IOCTL(function_object, wrb,
+ COMMON_EQ_CREATE);
+
+ ioctl->params.request.num_pages =
+ SA_PAGES_SPANNED(sa_sgl_get_offset(sgl), length);
+
+ /* init the context */
+ ioctl->params.request.context.Func =
+ be_function_get_function_number(function_object);
+ ioctl->params.request.context.valid = TRUE;
+ ioctl->params.request.context.Size = eqe_size_encoding;
+ ioctl->params.request.context.PD =
+ be_function_get_pd_number(function_object);
+ ioctl->params.request.context.Count = num_entries_encoding;
+ /* Let the caller ARM the EQ with the doorbell. */
+ ioctl->params.request.context.Armed = FALSE;
+ ioctl->params.request.context.EventVect =
+ be_function_get_function_number(function_object) * 32;
+
+ if (fake_eq) {
+ ioctl->params.request.context.Cidx = 0;
+ ioctl->params.request.context.Pidx = 2;
+ ioctl->params.request.context.EPIdx = 2;
+ }
+
+ if (watermark != -1) {
+ ioctl->params.request.context.WME = TRUE;
+ ioctl->params.request.context.Watermark = watermark;
+ ASSERT(watermark <= CEV_WMARK_240);
+ } else {
+ ioctl->params.request.context.WME = FALSE;
+ }
+
+ if (timer_delay != -1) {
+ ioctl->params.request.context.TMR = TRUE;
+
+ ASSERT(timer_delay <= 250); /* max value according to EAS */
+ timer_delay = MIN(timer_delay, 250);
+
+ ioctl->params.request.context.Delay = timer_delay;
+
+ } else {
+ ioctl->params.request.context.TMR = FALSE;
+ }
+
+ /* Create a page list for the IOCTL. */
+ be_sgl_to_pa_list(sgl,
+ ioctl->params.request.pages,
+ SA_NUMBER_OF(ioctl->params.request.pages));
+
+ status =
+ be_function_post_mcc_wrb(function_object, wrb, NULL, NULL,
+ ioctl);
+ if (status != BE_SUCCESS) {
+ TRACE(DL_ERR, "MCC to create EQ failed.");
+ goto Error;
+ }
+ /* Get the EQ id. The MPU allocates the IDs. */
+ eq_object->eq_id = ioctl->params.response.eq_id;
+
+ /* insert tracking object */
+ _be_function_add_eq(function_object, eq_object);
+
+ TRACE(DL_INFO,
+ "eq created. function:%d pd:%d eqid:%d bytes:%d eqeBytes:%d"
+ " wm:%d td:%d",
+ be_function_get_function_number(function_object),
+ be_function_get_pd_number(function_object), eq_object->eq_id,
+ num_entries * eqe_size, eqe_size, watermark, timer_delay);
+
+Error:
+ be_unlock_wrb_post(function_object);
+ return status;
+}
+
+BESTATUS be_eq_create(PBE_FUNCTION_OBJECT function_object, PSA_SGL
+ sgl, u32 eqe_size, u32 num_entries,
+ u32 watermark, /* CEV_WMARK_* or -1 */
+ u32 timer_delay, /* in 8us units, or -1 */
+ PBE_EQ_OBJECT eq_object)
+{
+ return be_eq_create_internal(function_object,
+ sgl,
+ eqe_size,
+ num_entries,
+ watermark,
+ timer_delay, FALSE, eq_object);
+}
+
+BESTATUS be_eq_fake_create(PBE_FUNCTION_OBJECT function_object,
+ u32 timer_delay, /* in 8us units, or -1 */
+ PBE_EQ_OBJECT eq_object)
+{
+ SA_SGL sgl;
+
+ sa_sgl_create_contiguous((PVOID) 0xbad0000,
+ (SA_PHYSICAL_ADDRESS) 0xbad00000,
+ SA_PAGE_SIZE, &sgl);
+
+ return be_eq_create_internal(function_object,
+ &sgl,
+ sizeof(EQ_ENTRY),
+ 4096 / sizeof(EQ_ENTRY),
+ 0xFFFFFFFF,
+ timer_delay, TRUE, eq_object);
+}
+
+/*!
+
+@...ef
+ Returns the EQ ID for EQ. This is the ID the chip references the queue as.
+
+@...am
+ EqObject - EQ Handle returned from EqObjectCreate.
+
+@...urn
+ EQ ID
+@...e
+ IRQL: any
+
+*/
+u32 be_eq_get_id(IN PBE_EQ_OBJECT eq_object)
+{
+ EQ_ASSERT(eq_object);
+ return eq_object->eq_id;
+}
+
+/*!
+
+@...ef
+ Sets the current callback to be invoked when a EQ entry is made available.
+ This need only be set if the owner of this EQ does not recieve the EQ
+ completions directly. i.e. it does not service interrupts.
+
+@...am
+ eq_object - EQ handle returned from eq_object_create.
+
+@...am
+ callback - function to invoke when the EQ needs processing.
+
+@...am
+ context - opaque context to pass to callback.
+
+@...urn
+ ptr to the previous callback.
+
+@...e
+ IRQL: any
+
+ this routine is currently not synchronized w/ the DPC that may run the EQ.
+ therefore it is the callers responcibility to ensure the EQ will not
+ interrupt while this routine is executing.
+*/
+EQ_CALLBACK
+be_eq_set_callback(IN PBE_EQ_OBJECT eq_object,
+ IN EQ_CALLBACK callback, IN PVOID context)
+{
+ EQ_CALLBACK old_callback;
+
+ EQ_ASSERT(eq_object);
+
+ old_callback = eq_object->callback;
+
+ eq_object->callback = callback;
+ eq_object->callback_context = context;
+
+ return old_callback;
+}
+
+/*!
+
+@...ef
+ This routine handles EQ processing on EQs that were 'unrecognized' by upper
+ level drivers. The only EQs that should be processed by this routine are
+ * iWARP EQ
+ The iWARP EQ will be delegated further for handling by the
+ iWARP device driver
+
+@...am
+ FunctionObject - Handle to a function object
+@...am
+ EqId - The Eq that has just completed processing
+
+@...urn
+
+@...e
+ IRQL: DISPATCH_LEVEL only
+
+ This routine should be called immediately when a EQ from a ULD is not
+ recognized.
+*/
+void
+be_eq_delegate_processing(IN PBE_FUNCTION_OBJECT function_object,
+ IN u32 eq_id)
+{
+ PBE_EQ_OBJECT eq_object;
+
+ FUNCTION_ASSERT(function_object);
+
+ eq_object = _be_eq_id_to_object(function_object, eq_id);
+
+ if (eq_object) {
+
+ eq_object->callback(function_object, eq_object,
+ eq_object->callback_context);
+
+ } else {
+
+ TRACE(DL_WARN, "eq_id %d not found for delegation", eq_id);
+ }
+
+}
+
+/*!
+
+@...ef
+ This routine adds a CQ as a dependent object on the given EQ. This will
+ cause the reference count to be incrmented and the CQ to be placed on
+ the EQ's list of active CQ objects.
+
+@...am
+ eq_object - EQ handle returned from eq_object_create.
+@...am
+ cq_object - CQ handle that is dependent on this EQ
+
+@...urn
+ EQ ID
+@...e
+ IRQL: < DISPATCH_LEVEL
+
+*/
+void _be_eq_add_cq(IN PBE_EQ_OBJECT eq_object, IN PBE_CQ_OBJECT cq_object)
+{
+ EQ_ASSERT(eq_object);
+
+ CQ_ASSERT(cq_object);
+
+ _be_eq_lock(eq_object);
+
+ be_eq_reference(eq_object);
+
+ sa_insert_tail_list(&eq_object->cq_list_head,
+ &cq_object->cqlist_for_eq);
+
+ _be_eq_unlock(eq_object);
+}
+
+/*!
+
+@...ef
+ References the given object. The object is guaranteed to remain active until
+ the reference count drops to zero.
+
+@...am
+ eq_object - CQ handle returned from cq_object_create.
+
+@...urn
+ returns the current reference count on the object
+
+@...e
+ IRQL: any
+
+*/
+u32 be_eq_reference(PBE_EQ_OBJECT eq_object)
+{
+ EQ_ASSERT(eq_object);
+ return sa_atomic_increment(&eq_object->ref_count);
+}
+
+/*!
+
+@...ef
+ Dereferences the given object. The object is guaranteed to remain
+ active until the reference count drops to zero.
+
+@...am
+ eq_object - CQ handle returned from cq_object_create.
+
+@...urn
+ returns the current reference count on the object
+
+@...e
+ IRQL: any
+
+*/
+u32 be_eq_dereference(PBE_EQ_OBJECT eq_object)
+{
+ EQ_ASSERT(eq_object);
+ return sa_atomic_decrement(&eq_object->ref_count);
+}
+
+/*!
+@...ef
+ This routine removes a CQ as a dependent object on the given EQ. This will
+ cause the reference count to be decrmented and the CQ to be removed from
+ the EQ's list of active CQ objects.
+@...am
+ eq_object - EQ handle returned from eq_object_create.
+@...am
+ cq_object - CQ handle that was dependent on this EQ
+@...urn
+ EQ ID
+@...e
+ IRQL: < DISPATCH_LEVEL
+*/
+void
+_be_eq_remove_cq(IN PBE_EQ_OBJECT eq_object, IN PBE_CQ_OBJECT cq_object)
+{
+ EQ_ASSERT(eq_object);
+ CQ_ASSERT(cq_object);
+
+ be_eq_dereference(eq_object);
+
+ _be_eq_lock(eq_object);
+ sa_remove_entry_list(&cq_object->cqlist_for_eq);
+ _be_eq_unlock(eq_object);
+}
+
+/*!
+@...ef
+ Deferences the given object. Once the object's reference count drops to
+ zero, the object is destroyed and all resources that are held by this
+ object are released. The on-chip context is also destroyed along with
+ the queue ID, and any mappings made into the UT.
+@...am
+ eq_object - EQ handle returned from eq_object_create.
+@...urn
+ BE_SUCCESS if successfull, , otherwise a useful error code is returned.
+@...e
+ IRQL: IRQL < DISPATCH_LEVEL
+*/
+BESTATUS be_eq_destroy(PBE_EQ_OBJECT eq_object)
+{
+ BESTATUS status = 0;
+
+ EQ_ASSERT(eq_object);
+
+ ASSERT(eq_object->ref_count == 0);
+ /* no CQs should reference this EQ now */
+ ASSERT(sa_is_list_empty(&eq_object->cq_list_head));
+
+ /* Send ioctl to destroy the EQ. */
+ status =
+ be_function_ring_destroy(eq_object->parent_function,
+ eq_object->eq_id, IOCTL_RING_TYPE_EQ);
+ ASSERT(status == 0);
+
+ /* remove from the function */
+ _be_function_remove_eq(eq_object->parent_function, eq_object);
+
+ /* zero tracking object */
+ sa_zero_mem(eq_object, sizeof(BE_EQ_OBJECT));
+
+ return BE_SUCCESS;
+}
+
+/*
+ *---------------------------------------------------------------------------
+ * Function: be_eq_modify_delay
+ * Changes the EQ delay for a group of EQs.
+ * num_eq - The number of EQs in the eq_array to adjust.
+ * This also is the number of delay values in
+ * the eq_delay_array.
+ * eq_array - Array of BE_EQ_OBJECT pointers to adjust.
+ * eq_delay_array - Array of "num_eq" timer delays in units
+ * of microseconds. The be_eq_query_delay_range
+ * ioctl returns the resolution and range of
+ * legal EQ delays.
+ * callback -
+ * callback_context -
+ * queue_context - Optional. Pointer to a previously allocated
+ * struct. If the MCC WRB ring is full, this
+ * structure is used to queue the operation. It
+ * will be posted to the MCC ring when space
+ * becomes available. All queued commands will
+ * be posted to the ring in the order they are
+ * received. It is always valid to pass a pointer to
+ * a generic BE_GENERIC_QUEUE_CONTEXT. However,
+ * the specific context structs
+ * are generally smaller than the generic struct.
+ * return pend_status - BE_SUCCESS (0) on success.
+ * BE_PENDING (postive value) if the IOCTL
+ * completion is pending. Negative error code on failure.
+ *-------------------------------------------------------------------------
+ */
+BESTATUS
+be_eq_modify_delay(IN PBE_FUNCTION_OBJECT function_object,
+ IN u32 num_eq,
+ IN BE_EQ_OBJECT **eq_array,
+ IN u32 *eq_delay_array,
+ IN MCC_WRB_CQE_CALLBACK callback,
+ IN PVOID callback_context,
+ IN PBE_EQ_MODIFY_DELAY_QUEUE_CONTEXT queue_context)
+{
+ IOCTL_COMMON_MODIFY_EQ_DELAY *ioctl = NULL;
+ MCC_WRB *wrb = NULL;
+ BESTATUS status = 0;
+ PBE_GENERIC_QUEUE_CONTEXT generic_context = NULL;
+ u32 i;
+
+ be_lock_wrb_post(function_object);
+
+ wrb = be_function_peek_mcc_wrb(function_object);
+ if (!wrb) {
+ if (queue_context && callback) {
+ wrb = (MCC_WRB *) &queue_context->wrb_header;
+ generic_context = (PBE_GENERIC_QUEUE_CONTEXT)
+ queue_context;
+ generic_context->context.bytes =
+ sizeof(*queue_context);
+ } else {
+ status = BE_STATUS_NO_MCC_WRB;
+ goto Error;
+ }
+ }
+ /* Prepares an embedded ioctl, including request/response sizes. */
+ ioctl =
+ BE_FUNCTION_PREPARE_EMBEDDED_IOCTL(function_object, wrb,
+ COMMON_MODIFY_EQ_DELAY);
+
+ ASSERT(num_eq > 0);
+ ASSERT(num_eq <= SA_NUMBER_OF(ioctl->params.request.delay));
+ ioctl->params.request.num_eq = num_eq;
+ for (i = 0; i < num_eq; i++) {
+ ioctl->params.request.delay[i].eq_id =
+ be_eq_get_id(eq_array[i]);
+ ioctl->params.request.delay[i].delay_in_microseconds =
+ eq_delay_array[i];
+ }
+
+ /* Post the Ioctl */
+ status =
+ be_function_post_mcc_wrb_with_queue_context(function_object,
+ wrb,
+ generic_context,
+ callback,
+ callback_context,
+ ioctl);
+
+Error:
+ be_unlock_wrb_post(function_object);
+
+ return status;
+
+}
+
+/*
+ *--------------------------------------------------------------------------
+ * Function: be_eq_query_delay_range
+ * Queries the resolution and range allowed for EQ delay.
+ * This is a constant set by the firmware, so it may be queried
+ * one time at system boot. It is the same for all EQs.
+ * This is a synchronous IOCTL.
+ * function_object - Previously created function object
+ * eq_delay_resolution - Resolution of EQ delay in microseconds.
+ * eq_delay_max - Max value of EQ delay in microseconds.
+ * return status - BE_SUCCESS (0) on success. Negative
+ * error code on failure.
+ *--------------------------------------------------------------------------
+ */
+BESTATUS
+be_eq_query_delay_range(IN PBE_FUNCTION_OBJECT function_object,
+ OUT u32 *eq_delay_resolution,
+ OUT u32 *eq_delay_max)
+{
+ IOCTL_COMMON_MODIFY_EQ_DELAY *ioctl = NULL;
+ MCC_WRB *wrb = NULL;
+ BESTATUS status = 0;
+
+ FUNCTION_ASSERT(function_object);
+
+ ASSERT(eq_delay_resolution);
+ ASSERT(eq_delay_max);
+
+ be_lock_wrb_post(function_object);
+
+ wrb = be_function_peek_mcc_wrb(function_object);
+ if (!wrb) {
+ ASSERT(wrb);
+ TRACE(DL_ERR, "No free MCC WRBs.");
+ status = BE_STATUS_NO_MCC_WRB;
+ goto Error;
+ }
+ /* Prepares an embedded ioctl, including request/response sizes. */
+ ioctl =
+ BE_FUNCTION_PREPARE_EMBEDDED_IOCTL(function_object, wrb,
+ COMMON_MODIFY_EQ_DELAY);
+
+ /* init the context */
+ ioctl->params.request.num_eq = 0;
+
+ status =
+ be_function_post_mcc_wrb(function_object, wrb, NULL, NULL,
+ ioctl);
+ if (status != BE_SUCCESS) {
+ TRACE(DL_ERR, "Query EQ delay range failed.");
+ goto Error;
+ }
+
+ *eq_delay_resolution =
+ ioctl->params.response.delay_resolution_in_microseconds;
+ *eq_delay_max = ioctl->params.response.delay_max_in_microseconds;
+
+ TRACE(DL_INFO, "eq delay. function:%d pd:%d resolution:%d max:%d",
+ be_function_get_function_number(function_object),
+ be_function_get_pd_number(function_object),
+ *eq_delay_resolution, *eq_delay_max);
+
+Error:
+ be_unlock_wrb_post(function_object);
+ return status;
+
+}
diff -uprN orig/linux-2.6.24.2/drivers/message/beclib/cq_ll.c benet/linux-2.6.24.2/drivers/message/beclib/cq_ll.c
--- orig/linux-2.6.24.2/drivers/message/beclib/cq_ll.c 1970-01-01 05:30:00.000000000 +0530
+++ benet/linux-2.6.24.2/drivers/message/beclib/cq_ll.c 2008-02-14 15:23:07.810205432 +0530
@@ -0,0 +1,443 @@
+/*
+ * Copyright (C) 2005 - 2008 ServerEngines
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or at your option any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, 5th Floor
+ * Boston, MA 02110-1301 USA
+ *
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called GPL.
+ *
+ * Contact Information:
+ * linux-drivers@...verengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ *
+ */
+#include "pch.h"
+
+/*
+ * Completion Queue Objects
+ */
+
+/*!
+@...ef
+ This routines searches for a CqId that is bound to a
+ specified function object.
+@...am
+ function_object - function object the CQ should be bound to.
+@...am
+ cq_id - cq_id to find
+@...urn
+ A pointer to the CQ_OBJECT that represents this CqId. NULL if not found
+@...e
+ IRQL: <= DISPATCH_LEVEL
+*/
+STATIC
+ INLINE
+ PBE_CQ_OBJECT
+be_cq_id_to_object(PBE_FUNCTION_OBJECT function_object, u32 cq_id)
+{
+ PBE_CQ_OBJECT cq_cur;
+ PBE_CQ_OBJECT cq_ret = NULL;
+
+ _be_function_lock(function_object);
+
+ SA_FOR_EACH_LIST_ENTRY(cq_cur, function_object->links.cq_list_head,
+ BE_CQ_OBJECT, cq_list) {
+ if (be_cq_get_id(cq_cur) == cq_id) {
+
+ cq_ret = cq_cur;
+ break;
+ }
+ }
+
+ _be_function_unlock(function_object);
+
+ if (!cq_ret) {
+ TRACE(DL_ERR, "Failed to locate cq_id:%d for processing.",
+ cq_id);
+ }
+
+ return cq_ret;
+}
+
+/*
+ *============================================================================
+ * P U B L I C R O U T I N E S
+ *============================================================================
+ */
+
+/*!
+
+@...ef
+ This routine creates a completion queue based on the client completion
+ queue configuration information.
+
+
+@...am
+ FunctionObject - Handle to a function object
+@...am
+ CqBaseVa - Base VA for a the CQ ring
+@...am
+ NumEntries - CEV_CQ_CNT_* values
+@...am
+ solEventEnable - 0 = All CQEs can generate Events if CQ is eventable
+ 1 = only CQEs with solicited bit set are eventable
+@...am
+ eventable - Eventable CQ, generates interrupts.
+@...am
+ nodelay - 1 = Force interrupt, relevent if CQ eventable.
+ Interrupt is asserted immediately after EQE
+ write is confirmed, regardless of EQ Timer
+ or watermark settings.
+@...am
+ wme - Enable watermark based coalescing
+@...am
+ wmThresh - High watermark(CQ fullness at which event
+ or interrupt should be asserted). These are the
+ CEV_WATERMARK encoded values.
+@...am
+ EqObject - EQ Handle to assign to this CQ
+@...am
+ ppCqObject - Internal CQ Handle returned.
+
+@...urn
+ BE_SUCCESS if successfull, otherwise a useful error code is returned.
+
+@...e
+ IRQL < DISPATCH_LEVEL
+
+*/
+BESTATUS be_cq_create(PBE_FUNCTION_OBJECT function_object,
+ PSA_SGL sgl, u32 length, boolean solicited_eventable,
+ boolean no_delay, u32 wm_thresh,
+ PBE_EQ_OBJECT eq_object, OUT PBE_CQ_OBJECT cq_object)
+{
+ BESTATUS status = BE_SUCCESS;
+ u32 num_entries_encoding;
+ u32 num_entries = length / sizeof(ISCSI_CQ_ENTRY);
+ IOCTL_COMMON_CQ_CREATE *ioctl = NULL;
+ MCC_WRB *wrb = NULL;
+
+ ASSERT(sgl);
+ ASSERT(cq_object);
+ ASSERT(length % sizeof(ISCSI_CQ_ENTRY) == 0);
+
+ FUNCTION_ASSERT(function_object);
+
+ switch (num_entries) {
+ case 256:
+ num_entries_encoding = CEV_CQ_CNT_256;
+ break;
+ case 512:
+ num_entries_encoding = CEV_CQ_CNT_512;
+ break;
+ case 1024:
+ num_entries_encoding = CEV_CQ_CNT_1024;
+ break;
+ default:
+ ASSERT(0);
+ return BE_STATUS_INVALID_PARAMETER;
+ }
+
+ /*
+ * All cq entries all the same size. Use iSCSI version
+ * as a test for the proper sgl length.
+ */
+ sa_zero_mem(cq_object, sizeof(*cq_object));
+
+ cq_object->magic = BE_CQ_MAGIC;
+ cq_object->ref_count = 0;
+ cq_object->parent_function = function_object;
+ cq_object->eq_object = eq_object;
+ cq_object->num_entries = num_entries;
+ /* save for MCC cq processing */
+ cq_object->va = sa_sgl_get_base_va(sgl);
+
+ /* map into UT. */
+ length = num_entries * sizeof(ISCSI_CQ_ENTRY);
+
+ be_lock_wrb_post(function_object);
+
+ wrb = be_function_peek_mcc_wrb(function_object);
+ if (!wrb) {
+ ASSERT(wrb);
+ TRACE(DL_ERR, "No free MCC WRBs in create EQ.");
+ status = BE_STATUS_NO_MCC_WRB;
+ goto Error;
+ }
+ /* Prepares an embedded ioctl, including request/response sizes. */
+ ioctl =
+ BE_FUNCTION_PREPARE_EMBEDDED_IOCTL(function_object, wrb,
+ COMMON_CQ_CREATE);
+
+ ioctl->params.request.num_pages =
+ SA_PAGES_SPANNED(sa_sgl_get_offset(sgl), length);
+
+ /* context */
+ ioctl->params.request.context.valid = TRUE;
+ ioctl->params.request.context.Func =
+ be_function_get_function_number(function_object);
+ ioctl->params.request.context.Eventable = (eq_object != NULL);
+ ioctl->params.request.context.Armed = TRUE;
+ ioctl->params.request.context.EQID =
+ eq_object ? eq_object->eq_id : 0;
+ ioctl->params.request.context.Count = num_entries_encoding;
+ ioctl->params.request.context.PD =
+ be_function_get_pd_number(function_object);
+ ioctl->params.request.context.NoDelay = no_delay;
+ ioctl->params.request.context.SolEvent = solicited_eventable;
+ ioctl->params.request.context.WME = (wm_thresh != 0xFFFFFFFF);
+ ioctl->params.request.context.Watermark =
+ (ioctl->params.request.context.WME ? wm_thresh : 0);
+
+ /* Create a page list for the IOCTL. */
+ be_sgl_to_pa_list(sgl,
+ ioctl->params.request.pages,
+ SA_NUMBER_OF(ioctl->params.request.pages));
+
+ /* Post the Ioctl */
+ status =
+ be_function_post_mcc_wrb(function_object, wrb, NULL, NULL,
+ ioctl);
+ if (status != BE_SUCCESS) {
+ TRACE(DL_ERR, "MCC to create CQ failed.");
+ goto Error;
+ }
+ /* Remember the CQ id. */
+ cq_object->cq_id = ioctl->params.response.cq_id;
+
+ /* insert this cq into eq_object reference */
+ if (eq_object) {
+ _be_eq_add_cq(eq_object, cq_object);
+ }
+ /* insert this cq into function_object */
+ _be_function_add_cq(function_object, cq_object);
+
+ TRACE(DL_INFO,
+ "cq created. function:%d pd:%d cqid:%d bytes:%d eqid:%d"
+ " se:%d nd:%d wm:%d",
+ be_function_get_function_number(function_object),
+ be_function_get_pd_number(function_object), cq_object->cq_id,
+ num_entries * sizeof(ISCSI_CQ_ENTRY),
+ eq_object ? be_eq_get_id(eq_object) : -1,
+ (u32) solicited_eventable, (u32) no_delay, wm_thresh);
+
+Error:
+ be_unlock_wrb_post(function_object);
+ return status;
+}
+
+/*!
+
+@...ef
+ Returns the CQ ID for CQ. This is the ID the chip references the queue as.
+
+@...am
+ cq_object - CQ handle returned from cq_object_create.
+
+@...urn
+ CQ ID
+@...e
+ IRQL: any
+
+*/
+u32 be_cq_get_id(PBE_CQ_OBJECT cq_object)
+{
+ CQ_ASSERT(cq_object);
+ return cq_object->cq_id;
+}
+
+/*!
+
+@...ef
+ Sets the current callback to be invoked when a CQ entry is made available.
+ This need only be set if the owner of this CQ does not recieve the CQ
+ completions directly. i.e. it does not service interrupts.
+
+@...am
+ cq_object - CQ handle returned from cq_object_create.
+
+@...am
+ callback - function to invoke when the CQ needs processing.
+
+@...am
+ context - opaque context to pass to callback.
+
+@...urn
+ ptr to the previous callback.
+
+@...e
+ IRQL: any
+
+ this routine is currently not synchronized w/ the DPC that may run the CQ.
+ therefore it is the callers responsibility to ensure the CQ will not
+ interrupt while this routine is executing.
+*/
+CQ_CALLBACK
+be_cq_object_set_callback(PBE_CQ_OBJECT cq_object,
+ CQ_CALLBACK callback, PVOID context)
+{
+ CQ_CALLBACK old_callback;
+
+ CQ_ASSERT(cq_object);
+
+ old_callback = cq_object->callback;
+
+ cq_object->callback = callback;
+ cq_object->callback_context = context;
+
+ return old_callback;
+}
+
+/*!
+
+@...ef
+ This routine handles CQ processing on CQs that were 'unrecognized' by upper
+ level drivers. The only CQs that should be processed by this routine are
+ MCC CQ and iWARP CQ and of these, only the MCC CQ will be processed
+ in this routine. The iWARP CQ will be delegated further for handling
+ by the iWARP device driver
+
+@...am
+ function_object - handle to a function object
+@...am
+ cq_id - the cq that has just completed processing
+
+@...urn
+
+
+@...e
+ IRQL: DISPATCH_LEVEL only
+
+ this routine should be called immediately when a CQ from a ULD is not
+ recognized.
+*/
+void
+be_cq_object_delegate_processing(PBE_FUNCTION_OBJECT function_object,
+ u32 cq_id)
+{
+ PBE_CQ_OBJECT cq_object;
+
+ FUNCTION_ASSERT(function_object);
+
+ cq_object = be_cq_id_to_object(function_object, cq_id);
+
+ if (cq_object) {
+
+ ASSERT(cq_object->callback);
+ cq_object->callback(function_object, cq_object,
+ cq_object->callback_context);
+
+ } else {
+
+ TRACE(DL_WARN, "cq_id %d not found for delegation", cq_id);
+ }
+
+}
+
+/*!
+
+@...ef
+ References the given object. The object is guaranteed to remain active until
+ the reference count drops to zero.
+
+@...am
+ cq_object - CQ handle returned from cq_object_create.
+
+@...urn
+ returns the current reference count on the object
+
+@...e
+ IRQL: any
+
+*/
+u32 be_cq_object_reference(PBE_CQ_OBJECT cq_object)
+{
+ CQ_ASSERT(cq_object);
+ return sa_atomic_increment(&cq_object->ref_count);
+}
+
+/*!
+
+@...ef
+ Dereferences the given object. The object is guaranteed to
+ remain active until the reference count drops to zero.
+
+@...am
+ cq_object - CQ handle returned from cq_object_create.
+
+@...urn
+ returns the current reference count on the object
+
+@...e
+ IRQL: any
+
+*/
+u32 be_cq_object_dereference(PBE_CQ_OBJECT cq_object)
+{
+ CQ_ASSERT(cq_object);
+ return sa_atomic_decrement(&cq_object->ref_count);
+}
+
+/*!
+
+@...ef
+ Deferences the given object. Once the object's reference count drops to
+ zero, the object is destroyed and all resources that are held by this object
+ are released. The on-chip context is also destroyed along with the queue
+ ID, and any mappings made into the UT.
+
+@...am
+ cq_object - CQ handle returned from cq_object_create.
+
+@...urn
+ returns the current reference count on the object
+
+@...e
+ IRQL: IRQL < DISPATCH_LEVEL
+*/
+BESTATUS be_cq_destroy(PBE_CQ_OBJECT cq_object)
+{
+ BESTATUS status = 0;
+
+ CQ_ASSERT(cq_object);
+ FUNCTION_ASSERT(cq_object->parent_function);
+
+ /* Nothing should reference this CQ at this point. */
+ ASSERT(cq_object->ref_count == 0);
+
+ /* Send ioctl to destroy the CQ. */
+ status =
+ be_function_ring_destroy(cq_object->parent_function,
+ cq_object->cq_id, IOCTL_RING_TYPE_CQ);
+ ASSERT(status == 0);
+
+ /* Remove reference if this is an eventable CQ. */
+ if (cq_object->eq_object)
+ _be_eq_remove_cq(cq_object->eq_object, cq_object);
+
+ /* Remove from the function object. */
+ _be_function_remove_cq(cq_object->parent_function, cq_object);
+
+ /* Zero the software tracking object. */
+ sa_zero_mem(cq_object, sizeof(*cq_object));
+
+ return BE_SUCCESS;
+}
diff -uprN orig/linux-2.6.24.2/drivers/message/beclib/mpu_ll.c benet/linux-2.6.24.2/drivers/message/beclib/mpu_ll.c
--- orig/linux-2.6.24.2/drivers/message/beclib/mpu_ll.c 1970-01-01 05:30:00.000000000 +0530
+++ benet/linux-2.6.24.2/drivers/message/beclib/mpu_ll.c 2008-02-14 15:32:53.337191800 +0530
@@ -0,0 +1,1559 @@
+/*
+ * Copyright (C) 2005 - 2008 ServerEngines
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or at your option any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ * See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, 5th Floor
+ * Boston, MA 02110-1301 USA
+ *
+ *
+ * The full GNU General Public License is included in this distribution
+ * in the file called GPL.
+ *
+ * Contact Information:
+ * linux-drivers@...verengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ *
+ */
+#include "pch.h"
+
+/*
+ *============================================================================
+ * F I L E S C O P E
+ *============================================================================
+ */
+
+void
+_be_mcc_free_wrb_buffers(PBE_MCC_OBJECT mcc,
+ PBE_MCC_WRB_CONTEXT wrb_context);
+
+/*!
+
+@...ef
+ This routine converts from a BladeEngine Mcc wrb completion status to
+ a standard NT status;
+
+@...am
+ MccStatus - BE Mcc WRB completion status to convert
+
+@...urn
+ An NT status
+
+@...e
+ IRQL < DISPATCH_LEVEL
+
+*/
+STATIC BESTATUS be_mcc_wrb_status_to_bestatus(IN u32 mcc_status)
+{
+ /* TODO -- Fix this if we want better status codes. */
+ switch (mcc_status) {
+ case MGMT_STATUS_SUCCESS:
+ return SA_SUCCESS;
+ default:
+ return BE_NOT_OK;
+ }
+}
+
+/*!
+@...ef
+ This routine waits for a previously posted mailbox WRB to be completed.
+ Specifically it waits for the mailbox to say that it's ready to accept
+ more data by setting the LSB of the mailbox pd register to 1.
+
+@...am
+ pcontroller - The function object to post this data to
+
+@...urn
+
+@...e
+ IRQL < DISPATCH_LEVEL
+*/
+STATIC void be_mcc_mailbox_wait(IN PBE_FUNCTION_OBJECT function_object)
+{
+ MPU_MAILBOX_DB mailbox_db;
+ u32 i = 0;
+ u32 tl;
+
+ FUNCTION_ASSERT(function_object);
+
+ if (function_object->emulate) {
+ /* No waiting for mailbox in emulated mode. */
+ return;
+ }
+
+ mailbox_db.dw = PD_READ(function_object, mcc_bootstrap_db);
+
+ tl = sa_trace_set_level(sa_trace_get_level() & ~DL_HW);
+ while (mailbox_db.ready == FALSE) {
+ if ((++i & 0x3FFFF) == 0) {
+ TRACE(DL_WARN,
+ "Waiting for mailbox ready for %dk polls.",
+ i / 1000);
+ }
+
+ sa_dev_stall(function_object->sa_dev, 1);
+
+ mailbox_db.dw = PD_READ(function_object, mcc_bootstrap_db);
+ }
+ sa_trace_set_level(tl);
+
+}
+
+/*!
+
+@...ef
+ This routine tells the MCC mailbox that there is data to processed
+ in the mailbox. It does this by setting the physical address for the
+ mailbox location and clearing the LSB. This routine returns immediately
+ and does not wait for the WRB to be processed.
+
+
+@...am
+ pcontroller - The function object to post this data to
+
+@...urn
+
+@...e
+ IRQL < DISPATCH_LEVEL
+
+*/
+STATIC void be_mcc_mailbox_notify(IN PBE_FUNCTION_OBJECT function_object)
+{
+ MPU_MAILBOX_DB mailbox_db;
+
+ FUNCTION_ASSERT(function_object);
+ ASSERT(function_object->mailbox.pa);
+ ASSERT(function_object->mailbox.va);
+
+ /* If emulated, do not ring the mailbox */
+ if (function_object->emulate) {
+ TRACE(DL_WARN, "MPU disabled. Skipping mailbox notify.");
+ return;
+ }
+
+ function_object->stats.mailbox_wrbs++;
+
+ /* form the higher bits in the address */
+ mailbox_db.dw = 0; /* init */
+ mailbox_db.hi = 1;
+ mailbox_db.ready = 0;
+ SA_C_ASSERT(BE_BIT_SIZE(MPU_MAILBOX_DB, address) == 30);
+ mailbox_db.address =
+ (u32) sa_upper_bits64(function_object->mailbox.pa, 30);
+
+ /* Wait for the MPU to be ready */
+ be_mcc_mailbox_wait(function_object);
+
+ /* Ring doorbell 1st time */
+ PD_WRITE(function_object, mcc_bootstrap_db, mailbox_db);
+
+ /* Wait for 1st write to be acknowledged. */
+ be_mcc_mailbox_wait(function_object);
+
+ /* form the lower bits in the address */
+ mailbox_db.hi = 0;
+ mailbox_db.ready = 0;
+ mailbox_db.address =
+ (u32) sa_bit_range64(function_object->mailbox.pa, 4, 30);
+
+ /* Ring doorbell 2nd time */
+ PD_WRITE(function_object, mcc_bootstrap_db, mailbox_db);
+}
+
+/*!
+@...ef
+ This routine tells the MCC mailbox that there is data to processed
+ in the mailbox. It does this by setting the physical address for the
+ mailbox location and clearing the LSB. This routine spins until the
+ MPU writes a 1 into the LSB indicating that the data has been received
+ and is ready to be processed.
+
+@...am
+ pcontroller - The function object to post this data to
+@...urn
+@...e
+ IRQL < DISPATCH_LEVEL
+*/
+STATIC
+ void
+be_mcc_mailbox_notify_and_wait(IN PBE_FUNCTION_OBJECT function_object)
+{
+ /*
+ * Notify it
+ */
+ be_mcc_mailbox_notify(function_object);
+
+ /*
+ * Now wait for completion of WRB
+ */
+ be_mcc_mailbox_wait(function_object);
+}
+
+void
+be_mcc_process_cqe(PBE_FUNCTION_OBJECT function_object, PMCC_CQ_ENTRY cqe)
+{
+
+ PBE_MCC_WRB_CONTEXT wrb_context = NULL;
+
+ FUNCTION_ASSERT(function_object);
+ ASSERT(cqe);
+
+ /*
+ * A command completed. Commands complete out-of-order.
+ * Determine which command completed from the TAG.
+ */
+ SA_C_ASSERT(sizeof(cqe->mcc_tag) >= sizeof(u64));
+ wrb_context =
+ (PBE_MCC_WRB_CONTEXT) SA_U64_TO_PTR(*((u64 *) cqe->mcc_tag));
+
+ ASSERT(wrb_context);
+
+#ifdef SA_DEBUG
+ /*
+ * Assert that at least one WRB was consumed since we posted this one.
+ * If this assert fires, it indicates that a WRB was completed
+ * before it was consumed.
+ */
+ if (wrb_context->ring_wrb) {
+ ASSERT(C_GT
+ (function_object->stats.consumed_wrbs,
+ wrb_context->consumed_count));
+ }
+#endif
+
+ /*
+ * Perform a response copy if requested.
+ * Only copy data if the IOCTL is successful.
+ */
+ if (cqe->completion_status == MGMT_STATUS_SUCCESS &&
+ wrb_context->copy.length > 0) {
+ ASSERT(wrb_context->wrb);
+ ASSERT(wrb_context->wrb->embedded);
+ ASSERT(wrb_context->copy.va);
+ ASSERT(wrb_context->copy.ioctl_offset +
+ wrb_context->copy.length <= SA_SIZEOF_FIELD(MCC_WRB,
+ payload));
+ sa_memcpy(wrb_context->copy.va,
+ (u8 *) &wrb_context->wrb->payload +
+ wrb_context->copy.ioctl_offset,
+ wrb_context->copy.length);
+ }
+
+ /* internal callback */
+ if (wrb_context->internal_callback) {
+ wrb_context->internal_callback(wrb_context->
+ internal_callback_context,
+ be_mcc_wrb_status_to_bestatus
+ (cqe->completion_status),
+ wrb_context->wrb);
+ }
+
+ /* callback */
+ if (wrb_context->callback) {
+ wrb_context->callback(wrb_context->callback_context,
+ be_mcc_wrb_status_to_bestatus(cqe->completion_status),
+ wrb_context->wrb);
+ }
+ /* Free the context structure */
+ _be_mcc_free_wrb_context(function_object, wrb_context);
+}
+
+void be_drive_mcc_wrb_queue(IN PBE_MCC_OBJECT mcc)
+{
+ PBE_FUNCTION_OBJECT function_object = NULL;
+ BESTATUS status = BE_PENDING;
+ PBE_GENERIC_QUEUE_CONTEXT queue_context;
+ PSA_LIST_ENTRY entry;
+ MCC_WRB *wrb;
+ MCC_WRB *queue_wrb;
+ u32 length;
+
+ MCC_ASSERT(mcc);
+
+ function_object = mcc->parent_function;
+
+ be_lock_wrb_post(function_object);
+
+ if (mcc->driving_backlog) {
+ be_unlock_wrb_post(function_object);
+ return;
+ }
+ /* Acquire the flag to limit 1 thread to redrive posts. */
+ mcc->driving_backlog = 1;
+
+ while (!sa_is_list_empty(&mcc->backlog)) {
+
+ wrb = _be_mpu_peek_ring_wrb(mcc, TRUE); /* Driving the queue */
+ if (!wrb) {
+ break; /* No space in the ring yet. */
+ }
+ /* Get the next queued entry to process. */
+ entry = sa_remove_head_list(&mcc->backlog);
+ ASSERT(entry);
+ queue_context =
+ SA_CONTAINING_RECORD(entry, BE_GENERIC_QUEUE_CONTEXT,
+ context.list);
+ function_object->links.mcc->backlog_length--;
+
+ /*
+ * Compute the required length of the WRB.
+ * Since the queue element may be smaller than
+ * the complete WRB, copy only the required number of bytes.
+ */
+ queue_wrb = (MCC_WRB *) &queue_context->wrb_header;
+ if (queue_wrb->embedded) {
+ length =
+ sizeof(BE_MCC_WRB_HEADER) +
+ queue_wrb->payload_length;
+ } else {
+ ASSERT(queue_wrb->sge_count == 1); /* only 1 frag. */
+ length = sizeof(BE_MCC_WRB_HEADER) +
+ queue_wrb->sge_count * sizeof(MCC_SGE);
+ }
+
+ /*
+ * Truncate the length based on the size of the
+ * queue element. Some elements that have output parameters
+ * can be smaller than the payload_length field would
+ * indicate. We really only need to copy the request
+ * parameters, not the response.
+ */
+ ASSERT(queue_context->context.bytes >=
+ SA_FIELD_OFFSET(BE_GENERIC_QUEUE_CONTEXT,
+ wrb_header));
+ length =
+ MIN(length,
+ queue_context->context.bytes -
+ SA_FIELD_OFFSET(BE_GENERIC_QUEUE_CONTEXT,
+ wrb_header));
+
+ /* Copy the queue element WRB into the ring. */
+ sa_memcpy(wrb, &queue_context->wrb_header, length);
+
+ /* Post the wrb. This should not fail assuming we have
+ * enough context structs. */
+ status = be_function_post_mcc_wrb_complete(function_object,
+ wrb, NULL, /* Do not queue */
+ queue_context->context.
+ callback,
+ queue_context->context.
+ callback_context,
+ queue_context->context.
+ internal_callback,
+ queue_context->context.
+ internal_callback_context,
+ queue_context->context.
+ optional_ioctl_va,
+ queue_context->context.copy);
+
+ if (status == BE_SUCCESS) {
+
+ /*
+ * Synchronous completion. Since it was queued,
+ * we will invoke the callback.
+ * To the user, this is an asynchronous request.
+ */
+ be_unlock_wrb_post(function_object);
+
+ ASSERT(queue_context->context.callback);
+
+ queue_context->context.callback(queue_context->context.
+ callback_context,
+ BE_SUCCESS, NULL);
+
+ be_lock_wrb_post(function_object);
+
+ } else if (status != BE_PENDING) {
+ /*
+ * Another resource failed. Should never happen
+ * if we have sufficient MCC_WRB_CONTEXT structs.
+ * Return to head of the queue.
+ */
+ TRACE(DL_WARN,
+ "beclib : failed to post a queued WRB. 0x%x",
+ status);
+ sa_insert_head_list(&mcc->backlog,
+ &queue_context->context.list);
+ function_object->links.mcc->backlog_length++;
+ break;
+ }
+ }
+
+ function_object->stats.queue_length =
+ function_object->links.mcc->backlog_length;
+
+ /* Free the flag to limit 1 thread to redrive posts. */
+ mcc->driving_backlog = 0;
+
+ be_unlock_wrb_post(function_object);
+}
+
+/* This function asserts that the WRB was consumed in order. */
+#ifdef SA_DEBUG
+u32 be_mcc_wrb_consumed_in_order(PBE_MCC_OBJECT mcc, PMCC_CQ_ENTRY cqe)
+{
+ PBE_FUNCTION_OBJECT function_object = mcc->parent_function;
+ PBE_MCC_WRB_CONTEXT wrb_context = NULL;
+ u32 wrb_index;
+ u32 wrb_consumed_in_order;
+
+ FUNCTION_ASSERT(function_object);
+ ASSERT(cqe);
+
+ /*
+ * A command completed. Commands complete out-of-order.
+ * Determine which command completed from the TAG.
+ */
+ SA_C_ASSERT(sizeof(cqe->mcc_tag) >= sizeof(u64));
+ wrb_context =
+ (PBE_MCC_WRB_CONTEXT) SA_U64_TO_PTR(*((u64 *) cqe->mcc_tag));
+
+ ASSERT(wrb_context);
+
+ wrb_index =
+ (u32) (((SA_PTR_TO_U64(wrb_context->ring_wrb) -
+ SA_PTR_TO_U64(mcc->sq.ring.va))) / sizeof(MCC_WRB));
+ ASSERT(wrb_index < sa_ring_num(&mcc->sq.ring));
+
+ wrb_consumed_in_order = (u32) (wrb_index == mcc->consumed_index);
+ mcc->consumed_index =
+ sa_addc(mcc->consumed_index, 1, sa_ring_num(&mcc->sq.ring));
+
+ return wrb_consumed_in_order;
+}
+#endif
+
+BESTATUS be_mcc_process_cq(IN PBE_MCC_OBJECT mcc, IN boolean rearm)
+{
+ PBE_FUNCTION_OBJECT function_object = NULL;
+ PMCC_CQ_ENTRY cqe;
+ CQ_DB db;
+ PSA_RING cq_ring = &mcc->cq.ring;
+ PSA_RING mcc_ring = &mcc->sq.ring;
+ u32 num_processed = 0;
+ u32 consumed = 0;
+
+ function_object = mcc->parent_function;
+ FUNCTION_ASSERT(function_object);
+
+ be_lock_cq_process(function_object);
+
+ function_object->stats.processed_cq++;
+
+ /*
+ * Verify that only one thread is processing the CQ at once.
+ * We cannot hold the lock while processing the CQ due to
+ * the callbacks into the OS. Therefore, this flag is used
+ * to control it. If any of the threads want to
+ * rearm the CQ, we need to honor that.
+ */
+ if (mcc->processing != 0) {
+ mcc->rearm = mcc->rearm || rearm;
+ goto Error;
+ } else {
+ mcc->processing = 1; /* lock processing for this thread. */
+ mcc->rearm = rearm; /* set our rearm setting */
+ }
+
+ be_unlock_cq_process(function_object);
+
+ cqe = sa_ring_current(cq_ring);
+ while (cqe->valid) {
+
+ function_object->stats.cq_entries++;
+
+ if (num_processed >= 8) {
+ /* coalesce doorbells, but free space in cq
+ * ring while processing. */
+ db.dw = 0; /* clear */
+ db.qid = cq_ring->id;
+ db.rearm = FALSE; /* Rearm at the end! */
+ db.event = FALSE;
+ db.num_popped = num_processed;
+ num_processed = 0;
+
+ PD_WRITE(function_object, cq_db, db);
+ }
+
+ if (cqe->async_event) {
+ /* This is an asynchronous event. */
+ ASYNC_EVENT_TRAILER *async_trailer =
+ (ASYNC_EVENT_TRAILER *)
+ ((u8 *) cqe + sizeof(MCC_CQ_ENTRY) -
+ sizeof(ASYNC_EVENT_TRAILER));
+
+ /* The async_event bit must be in the same
+ * location in both structs. */
+ SA_C_ASSERT(BE_WORD_OFFSET
+ (MCC_CQ_ENTRY,
+ async_event) * 32 +
+ BE_BIT_OFFSET(MCC_CQ_ENTRY,
+ async_event) ==
+ BE_BIT_OFFSET(ASYNC_EVENT_TRAILER,
+ async_event) +
+ 8 * (sizeof(MCC_CQ_ENTRY) -
+ sizeof(ASYNC_EVENT_TRAILER)));
+
+ ASSERT(async_trailer->async_event == 1);
+ ASSERT(async_trailer->valid == 1);
+
+ function_object->stats.async_events++;
+
+ /* Call the async event handler if it is installed. */
+ if (mcc->async_callback) {
+ TRACE(DL_INFO,
+ "Async event. Type:0x%x Code:0x%x",
+ async_trailer->event_type,
+ async_trailer->event_code);
+ mcc->async_callback(mcc->async_context,
+ (u32) async_trailer->
+ event_code,
+ (PVOID) cqe);
+ } else {
+ TRACE(DL_WARN,
+ "No async callback for event."
+ " Type:0x%x Code:0x%x",
+ async_trailer->event_type,
+ async_trailer->event_code);
+ function_object->stats.
+ ignored_async_events++;
+ }
+
+ } else {
+ /* This is a completion entry. */
+
+ /* No vm forwarding in this driver. */
+ ASSERT(cqe->hpi_buffer_completion == 0);
+
+ if (cqe->consumed) {
+ /*
+ * A command on the MCC ring was consumed.
+ * Update the consumer index.
+ * These occur in order.
+ */
+ ASSERT(be_mcc_wrb_consumed_in_order
+ (mcc, cqe));
+ consumed++;
+ function_object->stats.consumed_wrbs++;
+ }
+
+ if (cqe->completed) {
+ /* A command completed. Use tag to
+ * determine which command. */
+ be_mcc_process_cqe(function_object, cqe);
+ function_object->stats.completed_wrbs++;
+ }
+ }
+
+ /* Reset the CQE */
+ cqe->valid = FALSE;
+ num_processed++;
+
+ TRACE(DL_IOCTL, " update the cidx now cidx=%x",
+ cq_ring->cidx);
+ /* Update our tracking for the CQ ring. */
+ cqe = sa_ring_next(cq_ring);
+ }
+
+ TRACE(DL_INFO, "num_processed:0x%x, and consumed:0x%x",
+ num_processed, consumed);
+ /*
+ * Grab the CQ lock to synchronize the "rearm" setting for
+ * the doorbell, and for clearing the "processing" flag.
+ */
+ be_lock_cq_process(function_object);
+
+ /*
+ * Rearm the cq. This is done based on the global mcc->rearm
+ * flag which combines the rearm parameter from the current
+ * call to process_cq and any other threads
+ * that tried to process the CQ while this one was active.
+ * This handles the situation where a sync. ioctl was processing
+ * the CQ while the interrupt/dpc tries to process it.
+ * The sync process gets to continue -- but it is now
+ * responsible for the rearming.
+ */
+ if (num_processed > 0 || mcc->rearm == TRUE) {
+ db.dw = 0; /* clear */
+ db.qid = cq_ring->id;
+ db.rearm = mcc->rearm;
+ db.event = FALSE;
+ db.num_popped = num_processed;
+
+ PD_WRITE(function_object, cq_db, db);
+ }
+ /*
+ * Update the consumer index after ringing the CQ doorbell.
+ * We don't want another thread to post more WRBs before we
+ * have CQ space available.
+ */
+ sa_ring_consume_multiple(mcc_ring, consumed);
+
+ /* Clear the processing flag. */
+ mcc->processing = 0;
+
+Error:
+
+ be_unlock_cq_process(function_object);
+
+ /*
+ * Use the local variable to detect if the current thread
+ * holds the WRB post lock. If rearm is FALSE, this is
+ * either a synchronous command, or the upper layer driver is polling
+ * from a thread. We do not drive the queue from that
+ * context since the driver may hold the
+ * wrb post lock already.
+ */
+ if (rearm) {
+ be_drive_mcc_wrb_queue(mcc);
+ } else {
+ function_object->pend_queue_driving = 1;
+ }
+
+ return BE_SUCCESS;
+}
+
+/*
+ *============================================================================
+ * P U B L I C R O U T I N E S
+ *============================================================================
+ */
+
+/*!
+
+@...ef
+ This routine creates an MCC object. This object contains an MCC send queue
+ and a CQ private to the MCC.
+
+@...am
+ pcontroller - Handle to a function object
+
+@...am
+ EqObject - EQ object that will be used to dispatch this MCC
+
+@...am
+ ppMccObject - Pointer to an internal Mcc Object returned.
+
+@...urn
+ BE_SUCCESS if successfull,, otherwise a useful error code is returned.
+
+@...e
+ IRQL < DISPATCH_LEVEL
+
+*/
+BESTATUS
+be_mcc_ring_create(IN PBE_FUNCTION_OBJECT function_object,
+ IN PSA_SGL sgl,
+ IN u32 length,
+ IN PBE_MCC_WRB_CONTEXT context_array,
+ IN u32 num_context_entries,
+ IN PBE_CQ_OBJECT cq, IN PBE_MCC_OBJECT mcc)
+{
+ BESTATUS status = 0;
+
+ IOCTL_COMMON_MCC_CREATE *ioctl = NULL;
+ MCC_WRB *wrb = NULL;
+ u32 num_entries_encoded;
+ PVOID va = NULL;
+ u32 i;
+
+ if (length < sizeof(MCC_WRB) * 2) {
+ TRACE(DL_ERR, "Invalid MCC ring length:%d", length);
+ return BE_NOT_OK;
+ }
+ /*
+ * Reduce the actual ring size to be less than the number
+ * of context entries. This ensures that we run out of
+ * ring WRBs first so the queuing works correctly. We never
+ * queue based on context structs.
+ */
+ if (num_context_entries + 1 < length / sizeof(MCC_WRB) - 1) {
+
+ u32 max_length =
+ (num_context_entries + 2) * sizeof(MCC_WRB);
+
+ length = sa_gt_power2(max_length) / 2;
+ ASSERT(length <= max_length);
+
+ TRACE(DL_WARN,
+ "MCC ring length reduced based on context entries."
+ " length:%d wrbs:%d context_entries:%d",
+ length,
+ length / sizeof(MCC_WRB), num_context_entries);
+ }
+
+ be_lock_wrb_post(function_object);
+
+ num_entries_encoded =
+ be_ring_length_to_encoding(length, sizeof(MCC_WRB));
+
+ /* Init MCC object. */
+ SA_ZERO_MEM(mcc);
+ mcc->magic = BE_MCC_MAGIC;
+ mcc->parent_function = function_object;
+ mcc->cq_object = cq;
+
+ sa_initialize_list_head(&mcc->backlog);
+
+ wrb = be_function_peek_mcc_wrb(function_object);
+ if (!wrb) {
+ ASSERT(wrb);
+ TRACE(DL_ERR, "No free MCC WRBs in create EQ.");
+ status = BE_STATUS_NO_MCC_WRB;
+ goto error;
+ }
+ /* Prepares an embedded ioctl, including request/response sizes. */
+ ioctl =
+ BE_FUNCTION_PREPARE_EMBEDDED_IOCTL(function_object, wrb,
+ COMMON_MCC_CREATE);
+
+ ioctl->params.request.num_pages = sa_ceiling(length, SA_PAGE_SIZE);
+ ASSERT(ioctl->params.request.num_pages <=
+ sa_sgl_get_page_count(sgl));
+
+ /*
+ * Program MCC ring context
+ */
+ ioctl->params.request.context.pdid =
+ be_function_get_pd_number(function_object);
+ ioctl->params.request.context.invalid = FALSE;
+ ioctl->params.request.context.ring_size = num_entries_encoded;
+ ioctl->params.request.context.cq_id = be_cq_get_id(cq);
+
+ /* Create a page list for the IOCTL. */
+ be_sgl_to_pa_list(sgl, ioctl->params.request.pages,
+ SA_NUMBER_OF(ioctl->params.request.pages));
+
+ /* Post the Ioctl */
+ status =
+ be_function_post_mcc_wrb(function_object, wrb, NULL, NULL,
+ ioctl);
+ if (status != BE_SUCCESS) {
+ TRACE(DL_ERR, "MCC to create CQ failed.");
+ goto error;
+ }
+ /*
+ * Create a linked list of context structures
+ */
+ mcc->wrb_context.base = context_array;
+ mcc->wrb_context.num = num_context_entries;
+ sa_initialize_list_head(&mcc->wrb_context.list_head);
+ sa_zero_mem(context_array,
+ sizeof(BE_MCC_WRB_CONTEXT) * num_context_entries);
+ for (i = 0; i < mcc->wrb_context.num; i++) {
+ sa_insert_tail_list(&mcc->wrb_context.list_head,
+ &context_array[i].next);
+ }
+
+ /*
+ *
+ * Create an SA_RING for tracking WRB hw ring
+ */
+ va = sa_sgl_get_base_va(sgl);
+ ASSERT(va);
+ sa_ring_create(&mcc->sq.ring,
+ length / sizeof(MCC_WRB), sizeof(MCC_WRB), va);
+ mcc->sq.ring.id = ioctl->params.response.id; /* save the butler id! */
+
+ /*
+ * Init a SA_RING for tracking the MCC CQ.
+ */
+ ASSERT(cq->va);
+ sa_ring_create(&mcc->cq.ring, cq->num_entries,
+ sizeof(ISCSI_CQ_ENTRY), cq->va);
+ mcc->cq.ring.id = be_cq_get_id(cq);
+
+ /* Force zeroing of CQ. */
+ sa_zero_mem(cq->va, cq->num_entries * sizeof(ISCSI_CQ_ENTRY));
+
+ /* Initialize debug index. */
+ mcc->consumed_index = 0;
+
+ be_cq_object_reference(cq);
+ _be_function_add_mcc(function_object, mcc);
+
+ TRACE(DL_INFO,
+ "MCC ring created. id:%d bytes:%d cq_id:%d cq_entries:%d"
+ " num_context:%d",
+ ioctl->params.response.id,
+ length,
+ be_cq_get_id(cq), cq->num_entries, num_context_entries);
+
+error:
+ be_unlock_wrb_post(function_object);
+ return status;
+}
+
+u32 be_mcc_get_id(PBE_MCC_OBJECT mcc)
+{
+ MCC_ASSERT(mcc);
+ return mcc->sq.ring.id;
+}
+
+/*!
+
+@...ef
+ This routine destroys an MCC send queue
+
+@...am
+ MccObject - Internal Mcc Object to be destroyed.
+
+@...urn
+ BE_SUCCESS if successfull,, otherwise a useful error code is returned.
+
+@...e
+ IRQL < DISPATCH_LEVEL
+
+ The caller of this routine must ensure that no other WRB may be posted
+ until this routine returns.
+
+*/
+BESTATUS be_mcc_ring_destroy(IN PBE_MCC_OBJECT mcc)
+{
+ BESTATUS status = 0;
+
+ MCC_ASSERT(mcc);
+
+ ASSERT(mcc->processing == 0);
+
+ /*
+ * Remove the ring from the function object.
+ * This transitions back to mailbox mode.
+ */
+ _be_function_remove_mcc(mcc->parent_function, mcc);
+
+ /* Send ioctl to destroy the queue. (Using the mailbox.) */
+ status =
+ be_function_ring_destroy(mcc->parent_function, mcc->sq.ring.id,
+ IOCTL_RING_TYPE_MCC);
+ ASSERT(status == 0);
+
+ /* Release the SQ reference to the CQ */
+ be_cq_object_dereference(mcc->cq_object);
+
+ return status;
+}
+
+STATIC void
+mcc_wrb_sync_callback(IN PVOID context,
+ IN BESTATUS completion_status, IN PMCC_WRB wrb)
+{
+ PBE_MCC_WRB_CONTEXT wrb_context = (PBE_MCC_WRB_CONTEXT) context;
+
+ SA_NOT_USED(wrb);
+
+ ASSERT(wrb_context);
+
+ *wrb_context->users_final_status = completion_status;
+}
+
+/*!
+
+@...ef
+ This routine posts a command to the MCC send queue
+
+@...am
+ MccObject - Internal Mcc Object to be destroyed.
+
+@...am
+ wrb - wrb to post.
+
+
+@...am
+ CompletionCallback - Address of a callback routine to invoke once the WRB
+ is completed.
+
+@...am
+ CompletionCallbackContext - Opaque context to be passed during the call to
+ the CompletionCallback.
+
+@...urn
+ BE_SUCCESS if successfull,, otherwise a useful error code is returned.
+
+@...e
+ IRQL < DISPATCH_LEVEL if CompletionCallback is not NULL
+ IRQL <=DISPATCH_LEVEL if CompletionCallback is NULL
+
+ If this routine is called with CompletionCallback != NULL the
+ call is considered to be asynchronous and will return as soon
+ as the WRB is posted to the MCC with BE_PENDING.
+
+ If CompletionCallback is NULL, then this routine will not return until
+ a completion for this MCC command has been processed.
+ If called at DISPATCH_LEVEL the CompletionCallback must be NULL.
+
+ This routine should only be called if the MPU has been boostraped past
+ mailbox mode.
+
+
+*/
+BESTATUS
+_be_mpu_post_wrb_ring(IN PBE_MCC_OBJECT mcc,
+ IN PMCC_WRB wrb, IN PBE_MCC_WRB_CONTEXT wrb_context)
+{
+
+ PMCC_WRB ring_wrb = NULL;
+ BESTATUS status = BE_PENDING;
+ volatile BESTATUS final_status = BE_PENDING;
+ MCC_WRB_CQE_CALLBACK callback = NULL;
+ MCC_DB mcc_db;
+
+ MCC_ASSERT(mcc);
+ ASSERT(sa_ring_num_empty(&mcc->sq.ring) > 0);
+
+ /*
+ * Input wrb is most likely the next wrb in the ring, since the client
+ * can peek at the address.
+ */
+ ring_wrb = sa_ring_producer_ptr(&mcc->sq.ring);
+ if (wrb != ring_wrb) {
+ /* If not equal, copy it into the ring. */
+ sa_memcpy(ring_wrb, wrb, sizeof(MCC_WRB));
+ }
+ /* Minimal verification of posted WRB. */
+ ASSERT(wrb->embedded || wrb->sge_count > 0);
+
+ SA_DBG_ONLY(wrb_context->ring_wrb = ring_wrb;)
+
+ if (ring_wrb->embedded) {
+ /* embedded commands will have the response within the WRB. */
+ wrb_context->wrb = ring_wrb;
+ } else {
+ /*
+ * non-embedded commands will not have the response
+ * within the WRB, and they may complete out-of-order.
+ * The WRB will not be valid to inspect
+ * during the completion.
+ */
+ wrb_context->wrb = NULL;
+ }
+
+ callback = wrb_context->callback;
+
+ if (callback == NULL) {
+ /* Assign our internal callback if this is a
+ * synchronous call. */
+ wrb_context->callback = mcc_wrb_sync_callback;
+ wrb_context->callback_context = wrb_context;
+ wrb_context->users_final_status = &final_status;
+
+ mcc->parent_function->stats.synchronous_wrbs++;
+ }
+ /* Increment producer index */
+ sa_ring_produce(&mcc->sq.ring);
+
+ mcc_db.dw = 0; /* initialize */
+ mcc_db.rid = mcc->sq.ring.id;
+ mcc_db.numPosted = 1;
+
+ mcc->parent_function->stats.posted_wrbs++;
+
+ PD_WRITE(mcc->parent_function, mpu_mcc_db, mcc_db); /* Ring doorbell */
+ TRACE(DL_INFO, "pidx: %x and cidx: %x.", mcc->sq.ring.pidx,
+ mcc->sq.ring.cidx);
+
+ if (callback == NULL) {
+
+ i32 polls = 0; /* At >= 1 us per poll */
+
+ /* Wait until this command completes, polling the CQ. */
+ do {
+
+ TRACE(DL_INFO,
+ "IOCTL submitted in the poll mode.");
+ /* Do not rearm CQ in this context. */
+ be_mcc_process_cq(mcc, FALSE);
+
+ if (final_status == BE_PENDING) {
+ if ((++polls & 0x7FFFF) == 0) {
+ TRACE(DL_WARN,
+ "Warning : polling MCC CQ for %d"
+ "ms.", polls / 1000);
+ }
+
+ sa_dev_stall(mcc->parent_function->sa_dev, 1);
+ }
+
+ } while (final_status == BE_PENDING);
+
+ status = final_status;
+ }
+
+ return status;
+}
+
+PMCC_WRB
+_be_mpu_peek_ring_wrb(IN PBE_MCC_OBJECT mcc, boolean driving_queue)
+{
+ MCC_ASSERT(mcc);
+
+ /* If we have queued items, do not allow a post to bypass the queue. */
+ if (!driving_queue && !sa_is_list_empty(&mcc->backlog)) {
+ return NULL;
+ }
+
+ if (sa_ring_num_empty(&mcc->sq.ring) <= 0) {
+ return NULL;
+ }
+
+ return (PMCC_WRB) sa_ring_producer_ptr(&mcc->sq.ring);
+}
+
+BESTATUS
+be_mpu_init_mailbox(IN PBE_FUNCTION_OBJECT function_object,
+ IN PSA_SGL mailbox)
+{
+ FUNCTION_ASSERT(function_object);
+ ASSERT(mailbox);
+
+ function_object->mailbox.va = sa_sgl_get_base_va(mailbox);
+ function_object->mailbox.pa =
+ sa_sgl_get_page(mailbox, 0) + sa_sgl_get_offset(mailbox);
+ function_object->mailbox.length =
+ MIN(SA_PAGE_SIZE - sa_sgl_get_offset(mailbox),
+ sa_sgl_get_byte_count(mailbox));
+
+ ASSERT((SA_PTR_TO_U32(function_object->mailbox.va) & 0xf) == 0);
+ ASSERT((SA_PTR_TO_U32(function_object->mailbox.pa) & 0xf) == 0);
+ /*
+ * Issue the WRB to set MPU endianness
+ */
+ {
+ u8 *endian_check = (u8 *) &function_object->mailbox.va->wrb;
+ *endian_check++ = 0xFF; /* byte 0 */
+ *endian_check++ = 0x12; /* byte 1 */
+ *endian_check++ = 0x34; /* byte 2 */
+ *endian_check++ = 0xFF; /* byte 3 */
+ *endian_check++ = 0xFF; /* byte 4 */
+ *endian_check++ = 0x56; /* byte 5 */
+ *endian_check++ = 0x78; /* byte 6 */
+ *endian_check++ = 0xFF; /* byte 7 */
+ }
+
+ be_mcc_mailbox_notify_and_wait(function_object);
+
+ return BE_SUCCESS;
+}
+
+BESTATUS be_mpu_uninit_mailbox(IN PBE_FUNCTION_OBJECT function_object)
+{
+ FUNCTION_ASSERT(function_object);
+ ASSERT(function_object->mailbox.va);
+ ASSERT((SA_PTR_TO_U32(function_object->mailbox.va) & 0xf) == 0);
+ ASSERT((SA_PTR_TO_U32(function_object->mailbox.pa) & 0xf) == 0);
+ /*
+ * Issue the WRB to indicate mailbox teardown
+ */
+ {
+ u8 *mbox_unint = (u8 *) &function_object->mailbox.va->wrb;
+ *mbox_unint++ = 0xFF; /* byte 0 */
+ *mbox_unint++ = 0xAA; /* byte 1 */
+ *mbox_unint++ = 0xBB; /* byte 2 */
+ *mbox_unint++ = 0xFF; /* byte 3 */
+ *mbox_unint++ = 0xFF; /* byte 4 */
+ *mbox_unint++ = 0xCC; /* byte 5 */
+ *mbox_unint++ = 0xDD; /* byte 6 */
+ *mbox_unint++ = 0xFF; /* byte 7 */
+ }
+
+ be_mcc_mailbox_notify_and_wait(function_object);
+
+ return BE_SUCCESS;
+}
+
+void be_mpu_cleanup_mailbox(PBE_FUNCTION_OBJECT function_object)
+{
+
+ FUNCTION_ASSERT(function_object);
+ /*function_object->mailbox.sgl = NULL; */
+ function_object->mailbox.va = NULL;
+ function_object->mailbox.pa = 0ULL;
+ function_object->mailbox.length = 0UL;
+}
+
+/*!
+@...ef
+ This routine posts a command to the MCC mailbox.
+@...am
+ FuncObj - Function Object to post the WRB on behalf of.
+@...am
+ wrb - wrb to post.
+@...am
+ CompletionCallback - Address of a callback routine to invoke once the WRB
+ is completed.
+@...am
+ CompletionCallbackContext - Opaque context to be passed during the call to
+ the CompletionCallback.
+@...urn
+ BE_SUCCESS if successfull,, otherwise a useful error code is returned.
+@...e
+ IRQL <=DISPATCH_LEVEL if CompletionCallback is NULL
+
+ This routine will block until a completion for this MCC command has been
+ processed. If called at DISPATCH_LEVEL the CompletionCallback must be NULL.
+
+ This routine should only be called if the MPU has not been boostraped past
+ mailbox mode.
+*/
+BESTATUS
+_be_mpu_post_wrb_mailbox(IN PBE_FUNCTION_OBJECT function_object,
+ IN PMCC_WRB wrb,
+ IN PBE_MCC_WRB_CONTEXT wrb_context)
+{
+ PMCC_MAILBOX mailbox = NULL;
+
+ FUNCTION_ASSERT(function_object);
+ ASSERT(function_object->links.mcc == NULL);
+
+ mailbox = function_object->mailbox.va;
+ ASSERT(mailbox);
+
+ if ((PMCC_WRB) &mailbox->wrb != wrb) {
+ SA_ZERO_MEM(mailbox);
+ sa_memcpy(&mailbox->wrb, wrb, sizeof(MCC_WRB));
+ }
+ /* The callback can inspect the final WRB to get output parameters. */
+ wrb_context->wrb = &mailbox->wrb;
+
+ be_mcc_mailbox_notify_and_wait(function_object);
+
+ /* A command completed. Use tag to determine which command. */
+ be_mcc_process_cqe(function_object, &mailbox->cq);
+
+ return be_mcc_wrb_status_to_bestatus(mailbox->cq.
+ completion_status);
+}
+
+PBE_MCC_WRB_CONTEXT
+_be_mcc_allocate_wrb_context(PBE_FUNCTION_OBJECT function_object)
+{
+ PBE_MCC_WRB_CONTEXT context = NULL;
+ SA_IRQ irq;
+
+ FUNCTION_ASSERT(function_object);
+
+ sa_acquire_spinlock(&function_object->mcc_context_lock, &irq);
+
+ if (!function_object->mailbox.default_context_allocated) {
+ /* Use the single default context that we
+ * always have allocated. */
+ function_object->mailbox.default_context_allocated = TRUE;
+ context = &function_object->mailbox.default_context;
+ } else if (function_object->links.mcc) {
+ /* Get a context from the free list. If any are available. */
+ if (!sa_is_list_empty
+ (&function_object->links.mcc->wrb_context.list_head)) {
+ PSA_LIST_ENTRY list_entry =
+ sa_remove_head_list(&function_object->links.
+ mcc->wrb_context.
+ list_head);
+ context =
+ SA_CONTAINING_RECORD(list_entry,
+ BE_MCC_WRB_CONTEXT, next);
+ }
+ }
+
+ sa_release_spinlock(&function_object->mcc_context_lock, &irq);
+
+ return context;
+}
+
+void
+_be_mcc_free_wrb_context(PBE_FUNCTION_OBJECT function_object,
+ PBE_MCC_WRB_CONTEXT context)
+{
+ SA_IRQ irq;
+
+ FUNCTION_ASSERT(function_object);
+ ASSERT(context);
+
+ /*
+ * Zero during free to try and catch any bugs where the context
+ * is accessed after a free.
+ */
+ sa_zero_mem(context, sizeof(context));
+
+ sa_acquire_spinlock(&function_object->mcc_context_lock, &irq);
+
+ if (context == &function_object->mailbox.default_context) {
+ /* Free the default context. */
+ ASSERT(function_object->mailbox.default_context_allocated);
+ function_object->mailbox.default_context_allocated = FALSE;
+ } else {
+ /* Add to free list. */
+ ASSERT(function_object->links.mcc);
+ sa_insert_tail_list(&function_object->links.mcc->
+ wrb_context.list_head, &context->next);
+ }
+
+ sa_release_spinlock(&function_object->mcc_context_lock, &irq);
+}
+
+BESTATUS
+be_mcc_add_async_event_callback(IN BE_MCC_OBJECT *mcc_object,
+ IN MCC_ASYNC_EVENT_CALLBACK callback,
+ IN PVOID callback_context)
+{
+ MCC_ASSERT(mcc_object);
+
+ /* Lock against anyone trying to change the callback/context pointers
+ * while being used. */
+ be_lock_cq_process(mcc_object->parent_function);
+
+ /* Assign the async callback. */
+ mcc_object->async_context = callback_context;
+ mcc_object->async_callback = callback;
+
+ be_unlock_cq_process(mcc_object->parent_function);
+
+ return BE_SUCCESS;
+}
+
+#define MPU_EP_CONTROL 0
+#define MPU_EP_SEMAPHORE 0xac
+
+/*
+ *-------------------------------------------------------------------
+ * Function: be_wait_for_POST_complete
+ * Waits until the BladeEngine POST completes (either in error or success).
+ * function_object -
+ * return status - BE_SUCCESS (0) on success. Negative error code on failure.
+ *-------------------------------------------------------------------
+ */
+BESTATUS be_wait_for_POST_complete(IN PBE_FUNCTION_OBJECT function_object)
+{
+ MGMT_HBA_POST_STATUS_STRUCT postStatus;
+ BESTATUS status;
+
+ const u32 us_per_loop = 1000; /* 1000us */
+ const u32 print_frequency_loops = 1000000 / us_per_loop;
+ const u32 max_loops = 60 * print_frequency_loops;
+ u32 loops = 0;
+
+ /*
+ * Wait for arm fw indicating it is done or a fatal error happened.
+ * Note: POST can take some time to complete depending on configuration
+ * settings (consider ARM attempts to acquire an IP address
+ * over DHCP!!!).
+ *
+ */
+ do {
+ postStatus.dw =
+ BeCsrRead(function_object->sa_dev, MPU_EP_SEMAPHORE, NULL);
+ if (0 == (loops % print_frequency_loops)) {
+ /* Print current status */
+ TRACE(DL_INFO, "POST status = 0x%x (stage = 0x%x)",
+ postStatus.dw, postStatus.stage);
+ }
+ sa_dev_stall(function_object->sa_dev, us_per_loop);
+ } while ((postStatus.error != 1) &&
+ (postStatus.stage != POST_STAGE_ARMFW_READY) &&
+ (++loops < max_loops));
+
+ if (postStatus.error == 1) {
+ TRACE(DL_ERR, "POST error! Status = 0x%x (stage = 0x%x)",
+ postStatus.dw, postStatus.stage);
+ status = BE_NOT_OK;
+ } else if (postStatus.stage != POST_STAGE_ARMFW_READY) {
+ TRACE(DL_ERR,
+ "POST time-out! Status = 0x%x (stage = 0x%x)",
+ postStatus.dw, postStatus.stage);
+ status = BE_NOT_OK;
+ } else {
+ status = BE_SUCCESS;
+ }
+
+ return status;
+}
+
+/*
+ *-------------------------------------------------------------------
+ * Function: be_kickoff_and_wait_for_POST
+ * Interacts with the BladeEngine management processor to initiate POST, and
+ * subsequently waits until POST completes (either in error or success).
+ * The caller must acquire the reset semaphore before initiating POST
+ * to prevent multiple drivers interacting with the management processor.
+ * Once POST is complete the caller must release the reset semaphore.
+ * Callers who only want to wait for POST complete may call
+ * be_wait_for_POST_complete.
+ * function_object -
+ * return status - BE_SUCCESS (0) on success. Negative error code on failure.
+ *-------------------------------------------------------------------
+ */
+BESTATUS
+be_kickoff_and_wait_for_POST(IN PBE_FUNCTION_OBJECT function_object)
+{
+ MGMT_HBA_POST_STATUS_STRUCT postStatus;
+ BESTATUS status;
+
+ const u32 us_per_loop = 1000; /* 1000us */
+ const u32 print_frequency_loops = 1000000 / us_per_loop;
+ const u32 max_loops = 5 * print_frequency_loops;
+ u32 loops = 0;
+
+ /* Wait for arm fw awaiting host ready or a fatal error happened. */
+ TRACE(DL_INFO, "Wait for BladeEngine ready to POST");
+ do {
+ postStatus.dw =
+ BeCsrRead(function_object->sa_dev, MPU_EP_SEMAPHORE, NULL);
+ if (0 == (loops % print_frequency_loops)) {
+ /* Print current status */
+ TRACE(DL_INFO, "POST status = 0x%x (stage = 0x%x)",
+ postStatus.dw, postStatus.stage);
+ }
+ sa_dev_stall(function_object->sa_dev, us_per_loop);
+ } while ((postStatus.error != 1) &&
+ (postStatus.stage < POST_STAGE_AWAITING_HOST_RDY) &&
+ (++loops < max_loops));
+
+ if (postStatus.error == 1) {
+ TRACE(DL_ERR,
+ "Pre-POST error! Status = 0x%x (stage = 0x%x)",
+ postStatus.dw, postStatus.stage);
+ status = BE_NOT_OK;
+ } else if (postStatus.stage == POST_STAGE_AWAITING_HOST_RDY) {
+ BeCsrWrite(function_object->sa_dev, MPU_EP_SEMAPHORE,
+ POST_STAGE_HOST_RDY, NULL);
+
+ /* Wait for POST to complete */
+ status = be_wait_for_POST_complete(function_object);
+ } else {
+ /*
+ * Either a timeout waiting for host ready signal or POST has
+ * moved ahead without requiring a host ready signal.
+ * Might as well give POST a chance to complete
+ * (or timeout again).
+ */
+ status = be_wait_for_POST_complete(function_object);
+ }
+
+ return status;
+}
+
+/*
+ *-------------------------------------------------------------------
+ * Function: be_pci_soft_reset
+ * This function is called to issue a BladeEngine soft reset.
+ * Callers should acquire the soft reset semaphore before calling this
+ * function. Additionaly, callers should ensure they cannot be pre-empted
+ * while the routine executes. Upon completion of this routine, callers
+ * should release the reset semaphore. This routine implicitly waits
+ * for BladeEngine POST to complete.
+ * function_object -
+ * return status - BE_SUCCESS (0) on success. Negative error code on failure.
+ *-------------------------------------------------------------------
+ */
+BESTATUS be_pci_soft_reset(PBE_FUNCTION_OBJECT function_object)
+{
+ PCICFG_SOFT_RESET_CSR pciSoftReset;
+ PCICFG_ONLINE0_CSR pciOnline0;
+ PCICFG_ONLINE1_CSR pciOnline1;
+ EP_CONTROL_CSR epControlCsr;
+ BESTATUS status = BE_SUCCESS;
+ u32 i;
+
+ TRACE(DL_NOTE, "PCI reset...");
+
+ /* Issue soft reset #1 to get BladeEngine into a known state. */
+ pciSoftReset.dw = PCICFG0_READ(function_object, soft_reset);
+ pciSoftReset.softreset = 1;
+ PCICFG0_WRITE(function_object, soft_reset, pciSoftReset);
+
+ /*
+ * wait til soft reset is deasserted - hardware
+ * deasserts after some time.
+ */
+ i = 0;
+ while (pciSoftReset.softreset && (i++ < 1024)) {
+ sa_dev_stall(function_object->sa_dev, 50);
+ pciSoftReset.dw =
+ PCICFG0_READ(function_object, soft_reset);
+ };
+ if (pciSoftReset.softreset != 0) {
+ TRACE(DL_ERR,
+ "Soft-reset #1 did not deassert as expected.");
+ status = BE_NOT_OK;
+ goto Error_label;
+ }
+ /* Mask everything */
+ PCICFG0_WRITE_CONST(function_object, ue_status_low_mask,
+ 0xFFFFFFFF);
+ PCICFG0_WRITE_CONST(function_object, ue_status_hi_mask,
+ 0xFFFFFFFF);
+
+ /*
+ * Set everything offline except MPU IRAM (it is offline with
+ * the soft-reset, but soft-reset does not reset the PCICFG registers!)
+ */
+ pciOnline0.dw = 0;
+ pciOnline1.dw = 0;
+ pciOnline1.mpu_iram_online = 1;
+ PCICFG0_WRITE(function_object, online0, pciOnline0);
+ PCICFG0_WRITE(function_object, online1, pciOnline1);
+
+ sa_dev_stall(function_object->sa_dev, 50000); /* delay 5ms */
+
+ /* Issue soft reset #2. */
+ pciSoftReset.softreset = 1;
+ PCICFG0_WRITE(function_object, soft_reset, pciSoftReset);
+
+ /*
+ * wait til soft reset is deasserted - hardware
+ * deasserts after some time.
+ */
+ i = 0;
+ while (pciSoftReset.softreset && (i++ < 1024)) {
+ sa_dev_stall(function_object->sa_dev, 50);
+ pciSoftReset.dw =
+ PCICFG0_READ(function_object, soft_reset);
+ };
+ if (pciSoftReset.softreset != 0) {
+ TRACE(DL_ERR,
+ "Soft-reset #2 did not deassert as expected.");
+ status = BE_NOT_OK;
+ goto Error_label;
+ }
+
+ sa_dev_stall(function_object->sa_dev, 50000); /* delay 5ms */
+
+ /* Take MPU out of reset. */
+
+ /*epControlCsr.dw = CSR_READ(function_object, mpu.ep.ep_control); */
+ epControlCsr.dw =
+ BeCsrRead(function_object->sa_dev, MPU_EP_CONTROL, NULL);
+ epControlCsr.CPU_reset = 0;
+ /*CSR_WRITE(function_object, mpu.ep.ep_control, epControlCsr); */
+ BeCsrWrite(function_object->sa_dev, MPU_EP_CONTROL,
+ epControlCsr.dw, NULL);
+
+ /* Kickoff BE POST and wait for completion */
+ status = be_kickoff_and_wait_for_POST(function_object);
+
+Error_label:
+ return status;
+}
+
+/*
+ *-------------------------------------------------------------------
+ * Function: be_acquire_reset_semaphore
+ * Acquires the reset semaphore. If success is returned, the
+ * caller owns the reset semaphore. Otherwise the caller does not
+ * own the reset semaphore. Callers must acquire the reset semaphore
+ * before inducing a BladeEngine runtime reset. Callers must
+ * also release the reset semaphore once they are done with a
+ * soft reset. Release of the reset semaphore is accomplished with
+ * be_release_reset_semaphore.
+ * function_object -
+ * return status - BE_SUCCESS (0) on success. Negative error code on failure.
+ *-------------------------------------------------------------------
+ */
+BESTATUS be_acquire_reset_semaphore(IN PBE_FUNCTION_OBJECT function_object)
+{
+ ASSERT(FALSE == function_object->own_semaphore);
+ if (FALSE == function_object->own_semaphore) {
+ if (0 == PCICFG0_READ(function_object, semaphore[2])) {
+ /* This driver now owns the resource */
+ function_object->own_semaphore = TRUE;
+ return BE_SUCCESS;
+ } else {
+ /* Some other driver owns the resource */
+ return BE_NOT_OK;
+ }
+ }
+
+ return BE_SUCCESS;
+}
+
+/*
+ *-------------------------------------------------------------------
+ * Function: be_release_reset_semaphore
+ * Releases the reset semaphore. Callers must release the reset
+ * semaphore once they are done with a soft reset.
+ * function_object -
+ * return return_type -
+ *-------------------------------------------------------------------
+ */
+void be_release_reset_semaphore(IN PBE_FUNCTION_OBJECT function_object)
+{
+ ASSERT(TRUE == function_object->own_semaphore);
+
+ if (TRUE == function_object->own_semaphore) {
+ PCICFG0_WRITE_CONST(function_object, semaphore[2], 0);
+ function_object->own_semaphore = FALSE;
+ }
+
+ return;
+}
+
+/*
+ *-------------------------------------------------------------------
+ * Function: be_pci_reset_required
+ * This private function is called to detect if a host entity is
+ * required to issue a PCI soft reset and subsequently drive
+ * BladeEngine POST. Scenarios where this is required:
+ * 1) BIOS-less configuration
+ * 2) Hot-swap/plug/power-on
+ * function_object -
+ * return TRUE if a reset is required, FALSE otherwise
+ *-------------------------------------------------------------------
+ */
+boolean be_pci_reset_required(IN PBE_FUNCTION_OBJECT function_object)
+{
+ MGMT_HBA_POST_STATUS_STRUCT postStatus;
+ boolean doReset = FALSE;
+
+ /*
+ * Read the POST status register
+ *postStatus.dw = CSR_READ(function_object, mpu.ep.ep_semaphore);
+ */
+ postStatus.dw =
+ BeCsrRead(function_object->sa_dev, MPU_EP_SEMAPHORE, NULL);
+
+ if (postStatus.stage <= POST_STAGE_AWAITING_HOST_RDY) {
+ /*
+ * If BladeEngine is waiting for host ready indication,
+ * we want to do a PCI reset.
+ */
+ doReset = TRUE;
+ }
+
+ return doReset;
+}
+
+/*
+ *-------------------------------------------------------------------
+ * Function: be_drive_POST
+ * This function is called to drive BladeEngine POST. The
+ * caller should ensure they cannot be pre-empted while this routine executes.
+ * function_object -
+ * return status - BE_SUCCESS (0) on success. Negative error code on failure.
+ *-------------------------------------------------------------------
+ */
+BESTATUS be_drive_POST(IN PBE_FUNCTION_OBJECT function_object)
+{
+ BESTATUS status;
+
+ if (FALSE != be_pci_reset_required(function_object)) {
+ /* PCI reset is needed (implicitly starts and waits for POST) */
+ status = be_pci_soft_reset(function_object);
+ } else {
+ /* No PCI reset is needed, start POST */
+ status = be_kickoff_and_wait_for_POST(function_object);
+ }
+
+ return status;
+}
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