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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2016 Joyent, Inc.
*/
#include "cpqary3.h"
static size_t
cpqary3_round_up(size_t offset)
{
size_t gran = 0x20;
return ((offset + (gran - 1)) & ~(gran - 1));
}
static int
cpqary3_check_command_type(cpqary3_command_type_t type)
{
/*
* Note that we leave out the default case in order to utilise
* compiler warnings about missed enum values.
*/
switch (type) {
case CPQARY3_CMDTYPE_ABORTQ:
case CPQARY3_CMDTYPE_SCSA:
case CPQARY3_CMDTYPE_INTERNAL:
return (type);
}
panic("unexpected command type");
}
cpqary3_command_t *
cpqary3_command_alloc(cpqary3_t *cpq, cpqary3_command_type_t type,
int kmflags)
{
cpqary3_command_t *cpcm;
VERIFY(kmflags == KM_SLEEP || kmflags == KM_NOSLEEP);
if ((cpcm = kmem_zalloc(sizeof (*cpcm), kmflags)) == NULL) {
return (NULL);
}
cpcm->cpcm_ctlr = cpq;
cpcm->cpcm_type = cpqary3_check_command_type(type);
size_t contig_size = 0;
size_t errorinfo_offset;
contig_size += cpqary3_round_up(sizeof (CommandList_t));
errorinfo_offset = contig_size;
contig_size += cpqary3_round_up(sizeof (ErrorInfo_t));
/*
* Allocate physmem for CommandList_t (cpcm_va_cmd), and ErrorInfo_t
* (cpcm_va_err).
* XXX
*
* - 0x20 aligned CommandList_t
* header
* request block
* error descriptor
* scatter/gather list
* - 0x20 aligned ErrorInfo_t
* - ...?
*/
if ((cpcm->cpcm_va_cmd = (void *)cpqary3_alloc_phyctgs_mem(cpq,
contig_size, &cpcm->cpcm_pa_cmd, &cpcm->cpcm_phyctg,
kmflags)) == NULL) {
kmem_free(cpcm, sizeof (*cpcm));
return (NULL);
}
cpcm->cpcm_va_err = (void *)((caddr_t)cpcm->cpcm_va_cmd +
errorinfo_offset);
cpcm->cpcm_pa_err = cpcm->cpcm_pa_cmd + errorinfo_offset;
/*
* Ensure we asked for, and received, the correct physical alignment:
*/
VERIFY0(cpcm->cpcm_pa_cmd & 0x1f);
VERIFY0(cpcm->cpcm_pa_err & 0x1f);
/*
* Populate Fields.
*/
bzero(cpcm->cpcm_va_cmd, contig_size);
cpcm->cpcm_va_cmd->ErrDesc.Addr = cpcm->cpcm_pa_err;
cpcm->cpcm_va_cmd->ErrDesc.Len = sizeof (ErrorInfo_t);
/*
* Insert into the per-controller command list.
*/
mutex_enter(&cpq->cpq_mutex);
list_insert_tail(&cpq->cpq_commands, cpcm);
mutex_exit(&cpq->cpq_mutex);
return (cpcm);
}
int
cpqary3_command_attach_internal(cpqary3_t *cpq, cpqary3_command_t *cpcm,
size_t len, int kmflags)
{
cpqary3_command_internal_t *cpcmi;
VERIFY(kmflags == KM_SLEEP || kmflags == KM_NOSLEEP);
if ((cpcmi = kmem_zalloc(sizeof (*cpcmi), kmflags)) == NULL) {
return (ENOMEM);
}
if ((cpcmi->cpcmi_va = (void *)cpqary3_alloc_phyctgs_mem(cpq, len,
&cpcmi->cpcmi_pa, &cpcmi->cpcmi_phyctg, kmflags)) == NULL) {
kmem_free(cpcmi, sizeof (*cpcmi));
return (ENOMEM);
}
bzero(cpcmi->cpcmi_va, cpcmi->cpcmi_len);
cpcm->cpcm_internal = cpcmi;
cpcm->cpcm_va_cmd->SG[0].Addr = cpcmi->cpcmi_pa;
cpcm->cpcm_va_cmd->SG[0].Len = len;
cpcm->cpcm_va_cmd->Header.SGList = 1;
cpcm->cpcm_va_cmd->Header.SGTotal = 1;
return (0);
}
void
cpqary3_command_reuse(cpqary3_command_t *cpcm)
{
cpqary3_t *cpq = cpcm->cpcm_ctlr;
mutex_enter(&cpq->cpq_mutex);
/*
* Make sure the command is not currently inflight, then
* reset the command status.
*/
VERIFY(!(cpcm->cpcm_status & CPQARY3_CMD_STATUS_INFLIGHT));
cpcm->cpcm_status = CPQARY3_CMD_STATUS_REUSED;
/*
* Clear the previous tag value.
*/
cpcm->cpcm_tag = 0;
cpcm->cpcm_va_cmd->Header.Tag.tag_value = 0;
mutex_exit(&cpq->cpq_mutex);
}
void
cpqary3_command_free(cpqary3_command_t *cpcm)
{
cpqary3_t *cpq = cpcm->cpcm_ctlr;
/*
* Ensure the object we are about to free is not currently in the
* inflight AVL.
*/
VERIFY(!(cpcm->cpcm_status & CPQARY3_CMD_STATUS_INFLIGHT));
if (cpcm->cpcm_internal != NULL) {
cpqary3_command_internal_t *cpcmi = cpcm->cpcm_internal;
cpqary3_free_phyctgs_mem(&cpcmi->cpcmi_phyctg,
CPQARY3_FREE_PHYCTG_MEM);
kmem_free(cpcmi, sizeof (*cpcmi));
}
cpqary3_free_phyctgs_mem(&cpcm->cpcm_phyctg, CPQARY3_FREE_PHYCTG_MEM);
mutex_enter(&cpq->cpq_mutex);
list_remove(&cpq->cpq_commands, cpcm);
mutex_exit(&cpq->cpq_mutex);
kmem_free(cpcm, sizeof (*cpcm));
}
cpqary3_command_t *
cpqary3_lookup_inflight(cpqary3_t *cpq, uint32_t tag)
{
VERIFY(MUTEX_HELD(&cpq->cpq_mutex));
cpqary3_command_t srch;
srch.cpcm_tag = tag;
return (avl_find(&cpq->cpq_inflight, &srch, NULL));
}
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