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path: root/drivers/staging/benet/eq.c
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Diffstat (limited to 'drivers/staging/benet/eq.c')
-rw-r--r--drivers/staging/benet/eq.c299
1 files changed, 299 insertions, 0 deletions
diff --git a/drivers/staging/benet/eq.c b/drivers/staging/benet/eq.c
new file mode 100644
index 000000000000..db92ccd8fed8
--- /dev/null
+++ b/drivers/staging/benet/eq.c
@@ -0,0 +1,299 @@
+/*
+ * 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 version 2
+ * as published by the Free Software Foundation. The full GNU General
+ * Public License is included in this distribution in the file called COPYING.
+ *
+ * Contact Information:
+ * linux-drivers@serverengines.com
+ *
+ * ServerEngines
+ * 209 N. Fair Oaks Ave
+ * Sunnyvale, CA 94085
+ */
+#include "hwlib.h"
+#include "bestatus.h"
+/*
+ This routine creates an event queue based on the client completion
+ queue configuration information.
+
+ FunctionObject - Handle to a function object
+ EqBaseVa - Base VA for a the EQ ring
+ SizeEncoding - The encoded size for the EQ entries. This value is
+ either CEV_EQ_SIZE_4 or CEV_EQ_SIZE_16
+ NumEntries - CEV_CQ_CNT_* values.
+ 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.
+ 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.
+ ppEqObject - Internal EQ Handle returned.
+
+ Returns BE_SUCCESS if successfull,, otherwise a useful error code
+ is returned.
+
+ IRQL < DISPATCH_LEVEL
+*/
+int
+be_eq_create(struct be_function_object *pfob,
+ struct ring_desc *rd, u32 eqe_size, u32 num_entries,
+ u32 watermark, /* CEV_WMARK_* or -1 */
+ u32 timer_delay, /* in 8us units, or -1 */
+ struct be_eq_object *eq_object)
+{
+ int status = BE_SUCCESS;
+ u32 num_entries_encoding, eqe_size_encoding, length;
+ struct FWCMD_COMMON_EQ_CREATE *fwcmd = NULL;
+ struct MCC_WRB_AMAP *wrb = NULL;
+ u32 n;
+ unsigned long irql;
+
+ ASSERT(rd);
+ ASSERT(eq_object);
+
+ 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;
+ }
+
+ 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;
+ }
+
+ memset(eq_object, 0, sizeof(*eq_object));
+
+ atomic_set(&eq_object->ref_count, 0);
+ eq_object->parent_function = pfob;
+ eq_object->eq_id = 0xFFFFFFFF;
+
+ INIT_LIST_HEAD(&eq_object->cq_list_head);
+
+ length = num_entries * eqe_size;
+
+ spin_lock_irqsave(&pfob->post_lock, irql);
+
+ wrb = be_function_peek_mcc_wrb(pfob);
+ 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 fwcmd, including request/response sizes. */
+ fwcmd = BE_PREPARE_EMBEDDED_FWCMD(pfob, wrb, COMMON_EQ_CREATE);
+
+ fwcmd->params.request.num_pages = PAGES_SPANNED(OFFSET_IN_PAGE(rd->va),
+ length);
+ n = pfob->pci_function_number;
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, Func, &fwcmd->params.request.context, n);
+
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, valid, &fwcmd->params.request.context, 1);
+
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, Size,
+ &fwcmd->params.request.context, eqe_size_encoding);
+
+ n = 0; /* Protection Domain is always 0 in Linux driver */
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, PD, &fwcmd->params.request.context, n);
+
+ /* Let the caller ARM the EQ with the doorbell. */
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, Armed, &fwcmd->params.request.context, 0);
+
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, Count, &fwcmd->params.request.context,
+ num_entries_encoding);
+
+ n = pfob->pci_function_number * 32;
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, EventVect,
+ &fwcmd->params.request.context, n);
+ if (watermark != -1) {
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, WME,
+ &fwcmd->params.request.context, 1);
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, Watermark,
+ &fwcmd->params.request.context, watermark);
+ ASSERT(watermark <= CEV_WMARK_240);
+ } else
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, WME,
+ &fwcmd->params.request.context, 0);
+ if (timer_delay != -1) {
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, TMR,
+ &fwcmd->params.request.context, 1);
+
+ ASSERT(timer_delay <= 250); /* max value according to EAS */
+ timer_delay = min(timer_delay, (u32)250);
+
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, Delay,
+ &fwcmd->params.request.context, timer_delay);
+ } else {
+ AMAP_SET_BITS_PTR(EQ_CONTEXT, TMR,
+ &fwcmd->params.request.context, 0);
+ }
+ /* Create a page list for the FWCMD. */
+ be_rd_to_pa_list(rd, fwcmd->params.request.pages,
+ ARRAY_SIZE(fwcmd->params.request.pages));
+
+ status = be_function_post_mcc_wrb(pfob, wrb, NULL, NULL, NULL,
+ NULL, NULL, fwcmd, NULL);
+ 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 = fwcmd->params.response.eq_id;
+
+Error:
+ spin_unlock_irqrestore(&pfob->post_lock, irql);
+
+ if (pfob->pend_queue_driving && pfob->mcc) {
+ pfob->pend_queue_driving = 0;
+ be_drive_mcc_wrb_queue(pfob->mcc);
+ }
+ return status;
+}
+
+/*
+ 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.
+
+ eq_object - EQ handle returned from eq_object_create.
+
+ Returns BE_SUCCESS if successfull, otherwise a useful error code
+ is returned.
+
+ IRQL: IRQL < DISPATCH_LEVEL
+*/
+int be_eq_destroy(struct be_eq_object *eq_object)
+{
+ int status = 0;
+
+ ASSERT(atomic_read(&eq_object->ref_count) == 0);
+ /* no CQs should reference this EQ now */
+ ASSERT(list_empty(&eq_object->cq_list_head));
+
+ /* Send fwcmd to destroy the EQ. */
+ status = be_function_ring_destroy(eq_object->parent_function,
+ eq_object->eq_id, FWCMD_RING_TYPE_EQ,
+ NULL, NULL, NULL, NULL);
+ ASSERT(status == 0);
+
+ 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 struct 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
+ * fwcmd returns the resolution and range of
+ * legal EQ delays.
+ * cb -
+ * cb_context -
+ * q_ctxt - 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_q_cntxt. 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 FWCMD
+ * completion is pending. Negative error code on failure.
+ *-------------------------------------------------------------------------
+ */
+int
+be_eq_modify_delay(struct be_function_object *pfob,
+ u32 num_eq, struct be_eq_object **eq_array,
+ u32 *eq_delay_array, mcc_wrb_cqe_callback cb,
+ void *cb_context, struct be_eq_modify_delay_q_ctxt *q_ctxt)
+{
+ struct FWCMD_COMMON_MODIFY_EQ_DELAY *fwcmd = NULL;
+ struct MCC_WRB_AMAP *wrb = NULL;
+ int status = 0;
+ struct be_generic_q_ctxt *gen_ctxt = NULL;
+ u32 i;
+ unsigned long irql;
+
+ spin_lock_irqsave(&pfob->post_lock, irql);
+
+ wrb = be_function_peek_mcc_wrb(pfob);
+ if (!wrb) {
+ if (q_ctxt && cb) {
+ wrb = (struct MCC_WRB_AMAP *) &q_ctxt->wrb_header;
+ gen_ctxt = (struct be_generic_q_ctxt *) q_ctxt;
+ gen_ctxt->context.bytes = sizeof(*q_ctxt);
+ } else {
+ status = BE_STATUS_NO_MCC_WRB;
+ goto Error;
+ }
+ }
+ /* Prepares an embedded fwcmd, including request/response sizes. */
+ fwcmd = BE_PREPARE_EMBEDDED_FWCMD(pfob, wrb, COMMON_MODIFY_EQ_DELAY);
+
+ ASSERT(num_eq > 0);
+ ASSERT(num_eq <= ARRAY_SIZE(fwcmd->params.request.delay));
+ fwcmd->params.request.num_eq = num_eq;
+ for (i = 0; i < num_eq; i++) {
+ fwcmd->params.request.delay[i].eq_id = eq_array[i]->eq_id;
+ fwcmd->params.request.delay[i].delay_in_microseconds =
+ eq_delay_array[i];
+ }
+
+ /* Post the f/w command */
+ status = be_function_post_mcc_wrb(pfob, wrb, gen_ctxt,
+ cb, cb_context, NULL, NULL, fwcmd, NULL);
+
+Error:
+ spin_unlock_irqrestore(&pfob->post_lock, irql);
+
+ if (pfob->pend_queue_driving && pfob->mcc) {
+ pfob->pend_queue_driving = 0;
+ be_drive_mcc_wrb_queue(pfob->mcc);
+ }
+ return status;
+}
+