svn commit: r363388 - in head/sys: dev/iommu sys x86/iommu
Ruslan Bukin
br at FreeBSD.org
Tue Jul 21 13:50:11 UTC 2020
Author: br
Date: Tue Jul 21 13:50:10 2020
New Revision: 363388
URL: https://svnweb.freebsd.org/changeset/base/363388
Log:
Move sys/iommu.h to dev/iommu/ as a part of generic IOMMU busdma backend.
Reviewed by: kib
Sponsored by: DARPA/AFRL
Differential Revision: https://reviews.freebsd.org/D25750
Added:
head/sys/dev/iommu/iommu.h
- copied unchanged from r363387, head/sys/sys/iommu.h
Deleted:
head/sys/sys/iommu.h
Modified:
head/sys/dev/iommu/busdma_iommu.c
head/sys/dev/iommu/busdma_iommu.h
head/sys/x86/iommu/intel_dmar.h
Modified: head/sys/dev/iommu/busdma_iommu.c
==============================================================================
--- head/sys/dev/iommu/busdma_iommu.c Tue Jul 21 10:38:51 2020 (r363387)
+++ head/sys/dev/iommu/busdma_iommu.c Tue Jul 21 13:50:10 2020 (r363388)
@@ -39,7 +39,6 @@ __FBSDID("$FreeBSD$");
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/interrupt.h>
-#include <sys/iommu.h>
#include <sys/kernel.h>
#include <sys/ktr.h>
#include <sys/lock.h>
@@ -68,6 +67,7 @@ __FBSDID("$FreeBSD$");
#include <x86/include/busdma_impl.h>
#include <x86/iommu/intel_reg.h>
#include <dev/iommu/busdma_iommu.h>
+#include <dev/iommu/iommu.h>
#include <x86/iommu/intel_dmar.h>
#endif
Modified: head/sys/dev/iommu/busdma_iommu.h
==============================================================================
--- head/sys/dev/iommu/busdma_iommu.h Tue Jul 21 10:38:51 2020 (r363387)
+++ head/sys/dev/iommu/busdma_iommu.h Tue Jul 21 13:50:10 2020 (r363388)
@@ -34,7 +34,7 @@
#ifndef __X86_IOMMU_BUSDMA_DMAR_H
#define __X86_IOMMU_BUSDMA_DMAR_H
-#include <sys/iommu.h>
+#include <dev/iommu/iommu.h>
struct bus_dma_tag_iommu {
struct bus_dma_tag_common common;
Copied: head/sys/dev/iommu/iommu.h (from r363387, head/sys/sys/iommu.h)
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/iommu/iommu.h Tue Jul 21 13:50:10 2020 (r363388, copy of r363387, head/sys/sys/iommu.h)
@@ -0,0 +1,168 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2013 The FreeBSD Foundation
+ * All rights reserved.
+ *
+ * This software was developed by Konstantin Belousov <kib at FreeBSD.org>
+ * under sponsorship from the FreeBSD Foundation.
+ *
+ * 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.
+ *
+ * $FreeBSD$
+ */
+
+#ifndef _SYS_IOMMU_H_
+#define _SYS_IOMMU_H_
+
+#include <sys/queue.h>
+#include <sys/taskqueue.h>
+#include <sys/tree.h>
+#include <sys/types.h>
+
+/* Host or physical memory address, after translation. */
+typedef uint64_t iommu_haddr_t;
+/* Guest or bus address, before translation. */
+typedef uint64_t iommu_gaddr_t;
+
+struct bus_dma_tag_common;
+struct iommu_map_entry;
+TAILQ_HEAD(iommu_map_entries_tailq, iommu_map_entry);
+
+struct iommu_qi_genseq {
+ u_int gen;
+ uint32_t seq;
+};
+
+struct iommu_map_entry {
+ iommu_gaddr_t start;
+ iommu_gaddr_t end;
+ iommu_gaddr_t first; /* Least start in subtree */
+ iommu_gaddr_t last; /* Greatest end in subtree */
+ iommu_gaddr_t free_down; /* Max free space below the
+ current R/B tree node */
+ u_int flags;
+ TAILQ_ENTRY(iommu_map_entry) dmamap_link; /* Link for dmamap entries */
+ RB_ENTRY(iommu_map_entry) rb_entry; /* Links for domain entries */
+ TAILQ_ENTRY(iommu_map_entry) unroll_link; /* Link for unroll after
+ dmamap_load failure */
+ struct iommu_domain *domain;
+ struct iommu_qi_genseq gseq;
+};
+
+#define IOMMU_MAP_ENTRY_PLACE 0x0001 /* Fake entry */
+#define IOMMU_MAP_ENTRY_RMRR 0x0002 /* Permanent, not linked by
+ dmamap_link */
+#define IOMMU_MAP_ENTRY_MAP 0x0004 /* Busdma created, linked by
+ dmamap_link */
+#define IOMMU_MAP_ENTRY_UNMAPPED 0x0010 /* No backing pages */
+#define IOMMU_MAP_ENTRY_QI_NF 0x0020 /* qi task, do not free entry */
+#define IOMMU_MAP_ENTRY_READ 0x1000 /* Read permitted */
+#define IOMMU_MAP_ENTRY_WRITE 0x2000 /* Write permitted */
+#define IOMMU_MAP_ENTRY_SNOOP 0x4000 /* Snoop */
+#define IOMMU_MAP_ENTRY_TM 0x8000 /* Transient */
+
+struct iommu_unit {
+ struct mtx lock;
+ int unit;
+
+ int dma_enabled;
+
+ /* Busdma delayed map load */
+ struct task dmamap_load_task;
+ TAILQ_HEAD(, bus_dmamap_iommu) delayed_maps;
+ struct taskqueue *delayed_taskqueue;
+};
+
+/*
+ * Locking annotations:
+ * (u) - Protected by iommu unit lock
+ * (d) - Protected by domain lock
+ * (c) - Immutable after initialization
+ */
+
+struct iommu_domain {
+ struct iommu_unit *iommu; /* (c) */
+ struct mtx lock; /* (c) */
+ struct task unload_task; /* (c) */
+ u_int entries_cnt; /* (d) */
+ struct iommu_map_entries_tailq unload_entries; /* (d) Entries to
+ unload */
+};
+
+struct iommu_ctx {
+ struct iommu_domain *domain; /* (c) */
+ struct bus_dma_tag_iommu *tag; /* (c) Root tag */
+ u_long loads; /* atomic updates, for stat only */
+ u_long unloads; /* same */
+ u_int flags; /* (u) */
+};
+
+/* struct iommu_ctx flags */
+#define IOMMU_CTX_FAULTED 0x0001 /* Fault was reported,
+ last_fault_rec is valid */
+#define IOMMU_CTX_DISABLED 0x0002 /* Device is disabled, the
+ ephemeral reference is kept
+ to prevent context destruction */
+
+#define IOMMU_LOCK(unit) mtx_lock(&(unit)->lock)
+#define IOMMU_UNLOCK(unit) mtx_unlock(&(unit)->lock)
+#define IOMMU_ASSERT_LOCKED(unit) mtx_assert(&(unit)->lock, MA_OWNED)
+
+#define IOMMU_DOMAIN_LOCK(dom) mtx_lock(&(dom)->lock)
+#define IOMMU_DOMAIN_UNLOCK(dom) mtx_unlock(&(dom)->lock)
+#define IOMMU_DOMAIN_ASSERT_LOCKED(dom) mtx_assert(&(dom)->lock, MA_OWNED)
+
+static inline bool
+iommu_test_boundary(iommu_gaddr_t start, iommu_gaddr_t size,
+ iommu_gaddr_t boundary)
+{
+
+ if (boundary == 0)
+ return (true);
+ return (start + size <= ((start + boundary) & ~(boundary - 1)));
+}
+
+void iommu_free_ctx(struct iommu_ctx *ctx);
+void iommu_free_ctx_locked(struct iommu_unit *iommu, struct iommu_ctx *ctx);
+struct iommu_ctx *iommu_get_ctx(struct iommu_unit *, device_t dev,
+ uint16_t rid, bool id_mapped, bool rmrr_init);
+struct iommu_unit *iommu_find(device_t dev, bool verbose);
+void iommu_domain_unload_entry(struct iommu_map_entry *entry, bool free);
+void iommu_domain_unload(struct iommu_domain *domain,
+ struct iommu_map_entries_tailq *entries, bool cansleep);
+
+struct iommu_ctx *iommu_instantiate_ctx(struct iommu_unit *iommu,
+ device_t dev, bool rmrr);
+device_t iommu_get_requester(device_t dev, uint16_t *rid);
+int iommu_init_busdma(struct iommu_unit *unit);
+void iommu_fini_busdma(struct iommu_unit *unit);
+struct iommu_map_entry *iommu_map_alloc_entry(struct iommu_domain *iodom,
+ u_int flags);
+void iommu_map_free_entry(struct iommu_domain *, struct iommu_map_entry *);
+int iommu_map(struct iommu_domain *iodom,
+ const struct bus_dma_tag_common *common, iommu_gaddr_t size, int offset,
+ u_int eflags, u_int flags, vm_page_t *ma, struct iommu_map_entry **res);
+int iommu_map_region(struct iommu_domain *domain,
+ struct iommu_map_entry *entry, u_int eflags, u_int flags, vm_page_t *ma);
+
+#endif /* !_SYS_IOMMU_H_ */
Modified: head/sys/x86/iommu/intel_dmar.h
==============================================================================
--- head/sys/x86/iommu/intel_dmar.h Tue Jul 21 10:38:51 2020 (r363387)
+++ head/sys/x86/iommu/intel_dmar.h Tue Jul 21 13:50:10 2020 (r363388)
@@ -34,7 +34,7 @@
#ifndef __X86_IOMMU_INTEL_DMAR_H
#define __X86_IOMMU_INTEL_DMAR_H
-#include <sys/iommu.h>
+#include <dev/iommu/iommu.h>
struct dmar_unit;
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