blob: ce85f8ac632f5d9b4e2e5276a5125cf01e4a3311 [file] [log] [blame]
David Gibsonad0ebb92012-06-27 14:50:44 +10001/*
2 * QEMU sPAPR IOMMU (TCE) code
3 *
4 * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
Markus Armbruster0b8fa322019-05-23 16:35:07 +020019
Peter Maydell0d755902016-01-26 18:16:58 +000020#include "qemu/osdep.h"
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +100021#include "qemu/error-report.h"
Paolo Bonzini03dd0242015-12-15 13:16:16 +010022#include "qemu/log.h"
Markus Armbruster0b8fa322019-05-23 16:35:07 +020023#include "qemu/module.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010024#include "sysemu/kvm.h"
David Gibsonad0ebb92012-06-27 14:50:44 +100025#include "kvm_ppc.h"
Markus Armbrusterd6454272019-08-12 07:23:45 +020026#include "migration/vmstate.h"
Paolo Bonzini9c17d612012-12-17 18:20:04 +010027#include "sysemu/dma.h"
Paolo Bonzini022c62c2012-12-17 18:19:49 +010028#include "exec/address-spaces.h"
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +100029#include "trace.h"
David Gibsonad0ebb92012-06-27 14:50:44 +100030
Paolo Bonzini0d09e412013-02-05 17:06:20 +010031#include "hw/ppc/spapr.h"
Alexey Kardashevskiyee9a5692015-01-29 16:04:58 +110032#include "hw/ppc/spapr_vio.h"
David Gibsonad0ebb92012-06-27 14:50:44 +100033
34#include <libfdt.h>
35
David Gibsonce2918c2019-03-06 15:35:37 +110036enum SpaprTceAccess {
David Gibsonad0ebb92012-06-27 14:50:44 +100037 SPAPR_TCE_FAULT = 0,
38 SPAPR_TCE_RO = 1,
39 SPAPR_TCE_WO = 2,
40 SPAPR_TCE_RW = 3,
41};
42
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +100043#define IOMMU_PAGE_SIZE(shift) (1ULL << (shift))
44#define IOMMU_PAGE_MASK(shift) (~(IOMMU_PAGE_SIZE(shift) - 1))
45
David Gibsonce2918c2019-03-06 15:35:37 +110046static QLIST_HEAD(, SpaprTceTable) spapr_tce_tables;
David Gibsonad0ebb92012-06-27 14:50:44 +100047
David Gibsonce2918c2019-03-06 15:35:37 +110048SpaprTceTable *spapr_tce_find_by_liobn(target_ulong liobn)
David Gibsonad0ebb92012-06-27 14:50:44 +100049{
David Gibsonce2918c2019-03-06 15:35:37 +110050 SpaprTceTable *tcet;
David Gibsonad0ebb92012-06-27 14:50:44 +100051
David Gibsond4261662013-04-29 18:33:51 +000052 if (liobn & 0xFFFFFFFF00000000ULL) {
53 hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx "\n",
54 liobn);
55 return NULL;
56 }
57
David Gibsonad0ebb92012-06-27 14:50:44 +100058 QLIST_FOREACH(tcet, &spapr_tce_tables, list) {
Thomas Huthf9ce8e02015-05-07 15:33:38 +100059 if (tcet->liobn == (uint32_t)liobn) {
David Gibsonad0ebb92012-06-27 14:50:44 +100060 return tcet;
61 }
62 }
63
64 return NULL;
65}
66
Greg Kurz5709af32015-07-02 16:23:12 +100067static IOMMUAccessFlags spapr_tce_iommu_access_flags(uint64_t tce)
68{
69 switch (tce & SPAPR_TCE_RW) {
70 case SPAPR_TCE_FAULT:
71 return IOMMU_NONE;
72 case SPAPR_TCE_RO:
73 return IOMMU_RO;
74 case SPAPR_TCE_WO:
75 return IOMMU_WO;
76 default: /* SPAPR_TCE_RW */
77 return IOMMU_RW;
78 }
79}
80
Alexey Kardashevskiyfec5d3a2016-05-04 16:52:19 +100081static uint64_t *spapr_tce_alloc_table(uint32_t liobn,
82 uint32_t page_shift,
Alexey Kardashevskiyd6ee2a72017-03-10 12:41:13 +110083 uint64_t bus_offset,
Alexey Kardashevskiyfec5d3a2016-05-04 16:52:19 +100084 uint32_t nb_table,
85 int *fd,
86 bool need_vfio)
87{
88 uint64_t *table = NULL;
Alexey Kardashevskiyfec5d3a2016-05-04 16:52:19 +100089
Alexey Kardashevskiyd6ee2a72017-03-10 12:41:13 +110090 if (kvm_enabled()) {
91 table = kvmppc_create_spapr_tce(liobn, page_shift, bus_offset, nb_table,
92 fd, need_vfio);
Alexey Kardashevskiyfec5d3a2016-05-04 16:52:19 +100093 }
94
95 if (!table) {
96 *fd = -1;
Greg Kurzdec4ec42018-11-27 14:05:18 +010097 table = g_new0(uint64_t, nb_table);
Alexey Kardashevskiyfec5d3a2016-05-04 16:52:19 +100098 }
99
100 trace_spapr_iommu_new_table(liobn, table, *fd);
101
102 return table;
103}
104
105static void spapr_tce_free_table(uint64_t *table, int fd, uint32_t nb_table)
106{
107 if (!kvm_enabled() ||
108 (kvmppc_remove_spapr_tce(table, fd, nb_table) != 0)) {
109 g_free(table);
110 }
111}
112
Paolo Bonzini79e2b9a2015-01-21 12:09:14 +0100113/* Called from RCU critical section */
Alexey Kardashevskiy3df9d742017-07-11 13:56:19 +1000114static IOMMUTLBEntry spapr_tce_translate_iommu(IOMMUMemoryRegion *iommu,
115 hwaddr addr,
Peter Maydell2c91bcf2018-06-15 14:57:16 +0100116 IOMMUAccessFlags flag,
117 int iommu_idx)
David Gibsonad0ebb92012-06-27 14:50:44 +1000118{
David Gibsonce2918c2019-03-06 15:35:37 +1100119 SpaprTceTable *tcet = container_of(iommu, SpaprTceTable, iommu);
David Gibsonad0ebb92012-06-27 14:50:44 +1000120 uint64_t tce;
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +1000121 IOMMUTLBEntry ret = {
122 .target_as = &address_space_memory,
123 .iova = 0,
124 .translated_addr = 0,
125 .addr_mask = ~(hwaddr)0,
126 .perm = IOMMU_NONE,
127 };
David Gibsonad0ebb92012-06-27 14:50:44 +1000128
Alexey Kardashevskiyee9a5692015-01-29 16:04:58 +1100129 if ((addr >> tcet->page_shift) < tcet->nb_table) {
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +1000130 /* Check if we are in bound */
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000131 hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
132
133 tce = tcet->table[addr >> tcet->page_shift];
134 ret.iova = addr & page_mask;
135 ret.translated_addr = tce & page_mask;
136 ret.addr_mask = ~page_mask;
Greg Kurz5709af32015-07-02 16:23:12 +1000137 ret.perm = spapr_tce_iommu_access_flags(tce);
David Gibson53724ee2012-09-12 16:57:20 +0000138 }
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +1000139 trace_spapr_iommu_xlate(tcet->liobn, addr, ret.iova, ret.perm,
140 ret.addr_mask);
David Gibson53724ee2012-09-12 16:57:20 +0000141
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +1000142 return ret;
Paolo Bonzinia71bfbf2013-04-16 15:05:06 +0200143}
144
Alexey Kardashevskiy5f366662019-03-07 16:05:16 +1100145static void spapr_tce_replay(IOMMUMemoryRegion *iommu_mr, IOMMUNotifier *n)
146{
147 MemoryRegion *mr = MEMORY_REGION(iommu_mr);
148 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_GET_CLASS(iommu_mr);
149 hwaddr addr, granularity;
150 IOMMUTLBEntry iotlb;
David Gibsonce2918c2019-03-06 15:35:37 +1100151 SpaprTceTable *tcet = container_of(iommu_mr, SpaprTceTable, iommu);
Alexey Kardashevskiy5f366662019-03-07 16:05:16 +1100152
153 if (tcet->skipping_replay) {
154 return;
155 }
156
157 granularity = memory_region_iommu_get_min_page_size(iommu_mr);
158
159 for (addr = 0; addr < memory_region_size(mr); addr += granularity) {
160 iotlb = imrc->translate(iommu_mr, addr, IOMMU_NONE, n->iommu_idx);
161 if (iotlb.perm != IOMMU_NONE) {
162 n->notify(n, &iotlb);
163 }
164
165 /*
166 * if (2^64 - MR size) < granularity, it's possible to get an
167 * infinite loop here. This should catch such a wraparound.
168 */
169 if ((addr + granularity) < addr) {
170 break;
171 }
172 }
173}
174
Dr. David Alan Gilbert44b1ff32017-09-25 12:29:12 +0100175static int spapr_tce_table_pre_save(void *opaque)
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000176{
David Gibsonce2918c2019-03-06 15:35:37 +1100177 SpaprTceTable *tcet = SPAPR_TCE_TABLE(opaque);
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000178
179 tcet->mig_table = tcet->table;
180 tcet->mig_nb_table = tcet->nb_table;
181
182 trace_spapr_iommu_pre_save(tcet->liobn, tcet->mig_nb_table,
183 tcet->bus_offset, tcet->page_shift);
Dr. David Alan Gilbert44b1ff32017-09-25 12:29:12 +0100184
185 return 0;
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000186}
187
Alexey Kardashevskiy3df9d742017-07-11 13:56:19 +1000188static uint64_t spapr_tce_get_min_page_size(IOMMUMemoryRegion *iommu)
Alexey Kardashevskiyf682e9c2016-06-21 11:14:01 +1000189{
David Gibsonce2918c2019-03-06 15:35:37 +1100190 SpaprTceTable *tcet = container_of(iommu, SpaprTceTable, iommu);
Alexey Kardashevskiyf682e9c2016-06-21 11:14:01 +1000191
192 return 1ULL << tcet->page_shift;
193}
194
Alexey Kardashevskiy9ded7802018-02-06 11:08:24 -0700195static int spapr_tce_get_attr(IOMMUMemoryRegion *iommu,
196 enum IOMMUMemoryRegionAttr attr, void *data)
197{
David Gibsonce2918c2019-03-06 15:35:37 +1100198 SpaprTceTable *tcet = container_of(iommu, SpaprTceTable, iommu);
Alexey Kardashevskiy9ded7802018-02-06 11:08:24 -0700199
200 if (attr == IOMMU_ATTR_SPAPR_TCE_FD && kvmppc_has_cap_spapr_vfio()) {
201 *(int *) data = tcet->fd;
202 return 0;
203 }
204
205 return -EINVAL;
206}
207
Alexey Kardashevskiy3df9d742017-07-11 13:56:19 +1000208static void spapr_tce_notify_flag_changed(IOMMUMemoryRegion *iommu,
Peter Xu5bf3d312016-09-23 13:02:27 +0800209 IOMMUNotifierFlag old,
210 IOMMUNotifierFlag new)
Alexey Kardashevskiy606b5492016-07-04 13:33:03 +1000211{
David Gibsonce2918c2019-03-06 15:35:37 +1100212 struct SpaprTceTable *tbl = container_of(iommu, SpaprTceTable, iommu);
Alexey Kardashevskiy606b5492016-07-04 13:33:03 +1000213
Peter Xu5bf3d312016-09-23 13:02:27 +0800214 if (old == IOMMU_NOTIFIER_NONE && new != IOMMU_NOTIFIER_NONE) {
215 spapr_tce_set_need_vfio(tbl, true);
216 } else if (old != IOMMU_NOTIFIER_NONE && new == IOMMU_NOTIFIER_NONE) {
217 spapr_tce_set_need_vfio(tbl, false);
218 }
Alexey Kardashevskiy606b5492016-07-04 13:33:03 +1000219}
220
Alexey Kardashevskiyee9a5692015-01-29 16:04:58 +1100221static int spapr_tce_table_post_load(void *opaque, int version_id)
222{
David Gibsonce2918c2019-03-06 15:35:37 +1100223 SpaprTceTable *tcet = SPAPR_TCE_TABLE(opaque);
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000224 uint32_t old_nb_table = tcet->nb_table;
225 uint64_t old_bus_offset = tcet->bus_offset;
226 uint32_t old_page_shift = tcet->page_shift;
Alexey Kardashevskiyee9a5692015-01-29 16:04:58 +1100227
228 if (tcet->vdev) {
229 spapr_vio_set_bypass(tcet->vdev, tcet->bypass);
230 }
231
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000232 if (tcet->mig_nb_table != tcet->nb_table) {
233 spapr_tce_table_disable(tcet);
234 }
235
236 if (tcet->mig_nb_table) {
237 if (!tcet->nb_table) {
238 spapr_tce_table_enable(tcet, old_page_shift, old_bus_offset,
239 tcet->mig_nb_table);
240 }
241
242 memcpy(tcet->table, tcet->mig_table,
243 tcet->nb_table * sizeof(tcet->table[0]));
244
245 free(tcet->mig_table);
246 tcet->mig_table = NULL;
247 }
248
249 trace_spapr_iommu_post_load(tcet->liobn, old_nb_table, tcet->nb_table,
250 tcet->bus_offset, tcet->page_shift);
251
Alexey Kardashevskiyee9a5692015-01-29 16:04:58 +1100252 return 0;
253}
254
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000255static bool spapr_tce_table_ex_needed(void *opaque)
256{
David Gibsonce2918c2019-03-06 15:35:37 +1100257 SpaprTceTable *tcet = opaque;
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000258
259 return tcet->bus_offset || tcet->page_shift != 0xC;
260}
261
262static const VMStateDescription vmstate_spapr_tce_table_ex = {
263 .name = "spapr_iommu_ex",
264 .version_id = 1,
265 .minimum_version_id = 1,
266 .needed = spapr_tce_table_ex_needed,
267 .fields = (VMStateField[]) {
David Gibsonce2918c2019-03-06 15:35:37 +1100268 VMSTATE_UINT64(bus_offset, SpaprTceTable),
269 VMSTATE_UINT32(page_shift, SpaprTceTable),
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000270 VMSTATE_END_OF_LIST()
271 },
272};
273
Anthony Liguoria83000f2013-07-18 14:32:58 -0500274static const VMStateDescription vmstate_spapr_tce_table = {
275 .name = "spapr_iommu",
Alexey Kardashevskiy523e7b82014-05-27 15:36:35 +1000276 .version_id = 2,
277 .minimum_version_id = 2,
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000278 .pre_save = spapr_tce_table_pre_save,
Alexey Kardashevskiyee9a5692015-01-29 16:04:58 +1100279 .post_load = spapr_tce_table_post_load,
Alexey Kardashevskiy523e7b82014-05-27 15:36:35 +1000280 .fields = (VMStateField []) {
Anthony Liguoria83000f2013-07-18 14:32:58 -0500281 /* Sanity check */
David Gibsonce2918c2019-03-06 15:35:37 +1100282 VMSTATE_UINT32_EQUAL(liobn, SpaprTceTable, NULL),
Anthony Liguoria83000f2013-07-18 14:32:58 -0500283
284 /* IOMMU state */
David Gibsonce2918c2019-03-06 15:35:37 +1100285 VMSTATE_UINT32(mig_nb_table, SpaprTceTable),
286 VMSTATE_BOOL(bypass, SpaprTceTable),
287 VMSTATE_VARRAY_UINT32_ALLOC(mig_table, SpaprTceTable, mig_nb_table, 0,
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000288 vmstate_info_uint64, uint64_t),
Anthony Liguoria83000f2013-07-18 14:32:58 -0500289
290 VMSTATE_END_OF_LIST()
291 },
Alexey Kardashevskiya26fdf32016-06-01 18:57:34 +1000292 .subsections = (const VMStateDescription*[]) {
293 &vmstate_spapr_tce_table_ex,
294 NULL
295 }
Anthony Liguoria83000f2013-07-18 14:32:58 -0500296};
297
Greg Kurza931ad12017-07-25 19:59:06 +0200298static void spapr_tce_table_realize(DeviceState *dev, Error **errp)
Anthony Liguoria83000f2013-07-18 14:32:58 -0500299{
David Gibsonce2918c2019-03-06 15:35:37 +1100300 SpaprTceTable *tcet = SPAPR_TCE_TABLE(dev);
Alexey Kardashevskiyb4b6eb72016-06-01 18:57:35 +1000301 Object *tcetobj = OBJECT(tcet);
Greg Kurza205a052017-07-25 19:58:40 +0200302 gchar *tmp;
Anthony Liguoria83000f2013-07-18 14:32:58 -0500303
Alexey Kardashevskiyfec5d3a2016-05-04 16:52:19 +1000304 tcet->fd = -1;
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000305 tcet->need_vfio = false;
Greg Kurza205a052017-07-25 19:58:40 +0200306 tmp = g_strdup_printf("tce-root-%x", tcet->liobn);
Alexey Kardashevskiyb4b6eb72016-06-01 18:57:35 +1000307 memory_region_init(&tcet->root, tcetobj, tmp, UINT64_MAX);
Greg Kurza205a052017-07-25 19:58:40 +0200308 g_free(tmp);
Alexey Kardashevskiyb4b6eb72016-06-01 18:57:35 +1000309
Greg Kurza205a052017-07-25 19:58:40 +0200310 tmp = g_strdup_printf("tce-iommu-%x", tcet->liobn);
Alexey Kardashevskiy1221a472017-07-11 13:56:20 +1000311 memory_region_init_iommu(&tcet->iommu, sizeof(tcet->iommu),
312 TYPE_SPAPR_IOMMU_MEMORY_REGION,
313 tcetobj, tmp, 0);
Greg Kurza205a052017-07-25 19:58:40 +0200314 g_free(tmp);
Anthony Liguoria83000f2013-07-18 14:32:58 -0500315
316 QLIST_INSERT_HEAD(&spapr_tce_tables, tcet, list);
317
Alexey Kardashevskiy00d4f522014-05-12 18:46:32 +1000318 vmstate_register(DEVICE(tcet), tcet->liobn, &vmstate_spapr_tce_table,
319 tcet);
Anthony Liguoria83000f2013-07-18 14:32:58 -0500320}
321
David Gibsonce2918c2019-03-06 15:35:37 +1100322void spapr_tce_set_need_vfio(SpaprTceTable *tcet, bool need_vfio)
David Gibsonc10325d2015-10-01 10:46:10 +1000323{
324 size_t table_size = tcet->nb_table * sizeof(uint64_t);
Alexey Kardashevskiyf5509b62017-07-20 17:22:29 +1000325 uint64_t *oldtable;
326 int newfd = -1;
David Gibsonc10325d2015-10-01 10:46:10 +1000327
Alexey Kardashevskiyf5509b62017-07-20 17:22:29 +1000328 g_assert(need_vfio != tcet->need_vfio);
David Gibsonc10325d2015-10-01 10:46:10 +1000329
Alexey Kardashevskiyf5509b62017-07-20 17:22:29 +1000330 tcet->need_vfio = need_vfio;
David Gibsonc10325d2015-10-01 10:46:10 +1000331
Alexey Kardashevskiy9ded7802018-02-06 11:08:24 -0700332 if (!need_vfio || (tcet->fd != -1 && kvmppc_has_cap_spapr_vfio())) {
333 return;
334 }
335
Alexey Kardashevskiyf5509b62017-07-20 17:22:29 +1000336 oldtable = tcet->table;
David Gibsonc10325d2015-10-01 10:46:10 +1000337
Alexey Kardashevskiyf5509b62017-07-20 17:22:29 +1000338 tcet->table = spapr_tce_alloc_table(tcet->liobn,
339 tcet->page_shift,
340 tcet->bus_offset,
341 tcet->nb_table,
342 &newfd,
343 need_vfio);
344 memcpy(tcet->table, oldtable, table_size);
David Gibsonc10325d2015-10-01 10:46:10 +1000345
Alexey Kardashevskiyf5509b62017-07-20 17:22:29 +1000346 spapr_tce_free_table(oldtable, tcet->fd, tcet->nb_table);
David Gibsonc10325d2015-10-01 10:46:10 +1000347
Alexey Kardashevskiyf5509b62017-07-20 17:22:29 +1000348 tcet->fd = newfd;
David Gibsonc10325d2015-10-01 10:46:10 +1000349}
350
David Gibsonce2918c2019-03-06 15:35:37 +1100351SpaprTceTable *spapr_tce_new_table(DeviceState *owner, uint32_t liobn)
David Gibsonad0ebb92012-06-27 14:50:44 +1000352{
David Gibsonce2918c2019-03-06 15:35:37 +1100353 SpaprTceTable *tcet;
Greg Kurza205a052017-07-25 19:58:40 +0200354 gchar *tmp;
David Gibsonad0ebb92012-06-27 14:50:44 +1000355
David Gibson8b1853e2012-12-03 16:42:13 +0000356 if (spapr_tce_find_by_liobn(liobn)) {
Cédric Le Goaterce9863b2016-08-02 19:38:00 +0200357 error_report("Attempted to create TCE table with duplicate"
358 " LIOBN 0x%x", liobn);
David Gibson8b1853e2012-12-03 16:42:13 +0000359 return NULL;
360 }
361
Anthony Liguoria83000f2013-07-18 14:32:58 -0500362 tcet = SPAPR_TCE_TABLE(object_new(TYPE_SPAPR_TCE_TABLE));
David Gibsonad0ebb92012-06-27 14:50:44 +1000363 tcet->liobn = liobn;
David Gibsonad0ebb92012-06-27 14:50:44 +1000364
Greg Kurza205a052017-07-25 19:58:40 +0200365 tmp = g_strdup_printf("tce-table-%x", liobn);
Alexey Kardashevskiydea1b3c2015-05-07 15:33:37 +1000366 object_property_add_child(OBJECT(owner), tmp, OBJECT(tcet), NULL);
Greg Kurza205a052017-07-25 19:58:40 +0200367 g_free(tmp);
Michael Roth8dc97852017-07-25 20:00:09 +0200368 object_unref(OBJECT(tcet));
David Gibsonad0ebb92012-06-27 14:50:44 +1000369
Alexey Kardashevskiye4c35b72014-05-27 15:36:34 +1000370 object_property_set_bool(OBJECT(tcet), true, "realized", NULL);
David Gibsonad0ebb92012-06-27 14:50:44 +1000371
Paolo Bonzini2b7dc942013-04-10 17:30:48 +0200372 return tcet;
373}
374
David Gibsonce2918c2019-03-06 15:35:37 +1100375void spapr_tce_table_enable(SpaprTceTable *tcet,
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000376 uint32_t page_shift, uint64_t bus_offset,
377 uint32_t nb_table)
378{
379 if (tcet->nb_table) {
Alistair Francis3dc6f862017-07-12 06:57:41 -0700380 warn_report("trying to enable already enabled TCE table");
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000381 return;
382 }
383
384 tcet->bus_offset = bus_offset;
385 tcet->page_shift = page_shift;
386 tcet->nb_table = nb_table;
387 tcet->table = spapr_tce_alloc_table(tcet->liobn,
388 tcet->page_shift,
Alexey Kardashevskiyd6ee2a72017-03-10 12:41:13 +1100389 tcet->bus_offset,
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000390 tcet->nb_table,
391 &tcet->fd,
392 tcet->need_vfio);
393
Alexey Kardashevskiy3df9d742017-07-11 13:56:19 +1000394 memory_region_set_size(MEMORY_REGION(&tcet->iommu),
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000395 (uint64_t)tcet->nb_table << tcet->page_shift);
Alexey Kardashevskiy3df9d742017-07-11 13:56:19 +1000396 memory_region_add_subregion(&tcet->root, tcet->bus_offset,
397 MEMORY_REGION(&tcet->iommu));
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000398}
399
David Gibsonce2918c2019-03-06 15:35:37 +1100400void spapr_tce_table_disable(SpaprTceTable *tcet)
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000401{
402 if (!tcet->nb_table) {
403 return;
404 }
405
Alexey Kardashevskiy3df9d742017-07-11 13:56:19 +1000406 memory_region_del_subregion(&tcet->root, MEMORY_REGION(&tcet->iommu));
407 memory_region_set_size(MEMORY_REGION(&tcet->iommu), 0);
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000408
409 spapr_tce_free_table(tcet->table, tcet->fd, tcet->nb_table);
410 tcet->fd = -1;
411 tcet->table = NULL;
412 tcet->bus_offset = 0;
413 tcet->page_shift = 0;
414 tcet->nb_table = 0;
415}
416
David Gibson5f9490d2014-12-08 13:48:02 +1100417static void spapr_tce_table_unrealize(DeviceState *dev, Error **errp)
Paolo Bonzini2b7dc942013-04-10 17:30:48 +0200418{
David Gibsonce2918c2019-03-06 15:35:37 +1100419 SpaprTceTable *tcet = SPAPR_TCE_TABLE(dev);
Anthony Liguoria83000f2013-07-18 14:32:58 -0500420
Greg Kurzea359d22017-07-25 20:00:22 +0200421 vmstate_unregister(DEVICE(tcet), &vmstate_spapr_tce_table, tcet);
422
Paolo Bonzini2b7dc942013-04-10 17:30:48 +0200423 QLIST_REMOVE(tcet, list);
424
Alexey Kardashevskiydf7625d2016-06-01 18:57:33 +1000425 spapr_tce_table_disable(tcet);
Paolo Bonzini2b7dc942013-04-10 17:30:48 +0200426}
427
David Gibsonce2918c2019-03-06 15:35:37 +1100428MemoryRegion *spapr_tce_get_iommu(SpaprTceTable *tcet)
Paolo Bonzinia84bb432013-04-11 12:35:33 +0200429{
Alexey Kardashevskiyb4b6eb72016-06-01 18:57:35 +1000430 return &tcet->root;
Paolo Bonzinia84bb432013-04-11 12:35:33 +0200431}
432
Anthony Liguoria83000f2013-07-18 14:32:58 -0500433static void spapr_tce_reset(DeviceState *dev)
David Gibsoneddeed22012-09-12 16:57:14 +0000434{
David Gibsonce2918c2019-03-06 15:35:37 +1100435 SpaprTceTable *tcet = SPAPR_TCE_TABLE(dev);
Alexey Kardashevskiy523e7b82014-05-27 15:36:35 +1000436 size_t table_size = tcet->nb_table * sizeof(uint64_t);
David Gibsoneddeed22012-09-12 16:57:14 +0000437
David Gibson57c0eb12016-08-08 10:06:25 +1000438 if (tcet->nb_table) {
439 memset(tcet->table, 0, table_size);
440 }
David Gibsoneddeed22012-09-12 16:57:14 +0000441}
442
David Gibsonce2918c2019-03-06 15:35:37 +1100443static target_ulong put_tce_emu(SpaprTceTable *tcet, target_ulong ioba,
David Gibsonedded452012-06-27 14:50:46 +1000444 target_ulong tce)
David Gibsonad0ebb92012-06-27 14:50:44 +1000445{
Paolo Bonzinia84bb432013-04-11 12:35:33 +0200446 IOMMUTLBEntry entry;
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000447 hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
Alexey Kardashevskiy1b8ecee2014-05-27 15:36:37 +1000448 unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift;
David Gibsonad0ebb92012-06-27 14:50:44 +1000449
Alexey Kardashevskiy1b8ecee2014-05-27 15:36:37 +1000450 if (index >= tcet->nb_table) {
David Gibsonb55519a2013-04-29 18:33:52 +0000451 hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x"
David Gibsonad0ebb92012-06-27 14:50:44 +1000452 TARGET_FMT_lx "\n", ioba);
453 return H_PARAMETER;
454 }
455
Alexey Kardashevskiy1b8ecee2014-05-27 15:36:37 +1000456 tcet->table[index] = tce;
David Gibsonad0ebb92012-06-27 14:50:44 +1000457
Paolo Bonzinia84bb432013-04-11 12:35:33 +0200458 entry.target_as = &address_space_memory,
Alexey Kardashevskiyd78c19b2016-05-26 09:43:23 -0600459 entry.iova = (ioba - tcet->bus_offset) & page_mask;
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000460 entry.translated_addr = tce & page_mask;
461 entry.addr_mask = ~page_mask;
Greg Kurz5709af32015-07-02 16:23:12 +1000462 entry.perm = spapr_tce_iommu_access_flags(tce);
Peter Maydellcb1efcf2018-06-15 14:57:16 +0100463 memory_region_notify_iommu(&tcet->iommu, 0, entry);
Paolo Bonzinia84bb432013-04-11 12:35:33 +0200464
David Gibsonad0ebb92012-06-27 14:50:44 +1000465 return H_SUCCESS;
466}
467
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000468static target_ulong h_put_tce_indirect(PowerPCCPU *cpu,
David Gibsonce2918c2019-03-06 15:35:37 +1100469 SpaprMachineState *spapr,
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000470 target_ulong opcode, target_ulong *args)
471{
472 int i;
473 target_ulong liobn = args[0];
474 target_ulong ioba = args[1];
475 target_ulong ioba1 = ioba;
476 target_ulong tce_list = args[2];
477 target_ulong npages = args[3];
Alexey Kardashevskiyf1215ea2015-05-07 15:33:29 +1000478 target_ulong ret = H_PARAMETER, tce = 0;
David Gibsonce2918c2019-03-06 15:35:37 +1100479 SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000480 CPUState *cs = CPU(cpu);
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000481 hwaddr page_mask, page_size;
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000482
483 if (!tcet) {
484 return H_PARAMETER;
485 }
486
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000487 if ((npages > 512) || (tce_list & SPAPR_TCE_PAGE_MASK)) {
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000488 return H_PARAMETER;
489 }
490
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000491 page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
492 page_size = IOMMU_PAGE_SIZE(tcet->page_shift);
493 ioba &= page_mask;
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000494
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000495 for (i = 0; i < npages; ++i, ioba += page_size) {
Greg Kurz4d9ab7d2015-07-02 16:23:11 +1000496 tce = ldq_be_phys(cs->as, tce_list + i * sizeof(target_ulong));
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000497
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000498 ret = put_tce_emu(tcet, ioba, tce);
499 if (ret) {
500 break;
501 }
502 }
503
504 /* Trace last successful or the first problematic entry */
505 i = i ? (i - 1) : 0;
Alexey Kardashevskiyd9d96a32015-05-07 15:33:33 +1000506 if (SPAPR_IS_PCI_LIOBN(liobn)) {
507 trace_spapr_iommu_pci_indirect(liobn, ioba1, tce_list, i, tce, ret);
508 } else {
509 trace_spapr_iommu_indirect(liobn, ioba1, tce_list, i, tce, ret);
510 }
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000511 return ret;
512}
513
David Gibsonce2918c2019-03-06 15:35:37 +1100514static target_ulong h_stuff_tce(PowerPCCPU *cpu, SpaprMachineState *spapr,
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000515 target_ulong opcode, target_ulong *args)
516{
517 int i;
518 target_ulong liobn = args[0];
519 target_ulong ioba = args[1];
520 target_ulong tce_value = args[2];
521 target_ulong npages = args[3];
522 target_ulong ret = H_PARAMETER;
David Gibsonce2918c2019-03-06 15:35:37 +1100523 SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000524 hwaddr page_mask, page_size;
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000525
526 if (!tcet) {
527 return H_PARAMETER;
528 }
529
530 if (npages > tcet->nb_table) {
531 return H_PARAMETER;
532 }
533
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000534 page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
535 page_size = IOMMU_PAGE_SIZE(tcet->page_shift);
536 ioba &= page_mask;
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000537
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000538 for (i = 0; i < npages; ++i, ioba += page_size) {
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000539 ret = put_tce_emu(tcet, ioba, tce_value);
540 if (ret) {
541 break;
542 }
543 }
Alexey Kardashevskiyd9d96a32015-05-07 15:33:33 +1000544 if (SPAPR_IS_PCI_LIOBN(liobn)) {
545 trace_spapr_iommu_pci_stuff(liobn, ioba, tce_value, npages, ret);
546 } else {
547 trace_spapr_iommu_stuff(liobn, ioba, tce_value, npages, ret);
548 }
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000549
550 return ret;
551}
552
David Gibsonce2918c2019-03-06 15:35:37 +1100553static target_ulong h_put_tce(PowerPCCPU *cpu, SpaprMachineState *spapr,
David Gibsonedded452012-06-27 14:50:46 +1000554 target_ulong opcode, target_ulong *args)
555{
556 target_ulong liobn = args[0];
557 target_ulong ioba = args[1];
558 target_ulong tce = args[2];
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +1000559 target_ulong ret = H_PARAMETER;
David Gibsonce2918c2019-03-06 15:35:37 +1100560 SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
David Gibsonedded452012-06-27 14:50:46 +1000561
David Gibsonedded452012-06-27 14:50:46 +1000562 if (tcet) {
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000563 hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
564
565 ioba &= page_mask;
566
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +1000567 ret = put_tce_emu(tcet, ioba, tce);
David Gibsonedded452012-06-27 14:50:46 +1000568 }
Alexey Kardashevskiyd9d96a32015-05-07 15:33:33 +1000569 if (SPAPR_IS_PCI_LIOBN(liobn)) {
570 trace_spapr_iommu_pci_put(liobn, ioba, tce, ret);
571 } else {
572 trace_spapr_iommu_put(liobn, ioba, tce, ret);
573 }
David Gibsonedded452012-06-27 14:50:46 +1000574
Alexey Kardashevskiy7e472262013-08-29 18:05:00 +1000575 return ret;
David Gibsonedded452012-06-27 14:50:46 +1000576}
577
David Gibsonce2918c2019-03-06 15:35:37 +1100578static target_ulong get_tce_emu(SpaprTceTable *tcet, target_ulong ioba,
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100579 target_ulong *tce)
580{
Alexey Kardashevskiy1b8ecee2014-05-27 15:36:37 +1000581 unsigned long index = (ioba - tcet->bus_offset) >> tcet->page_shift;
582
583 if (index >= tcet->nb_table) {
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100584 hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x"
585 TARGET_FMT_lx "\n", ioba);
586 return H_PARAMETER;
587 }
588
Alexey Kardashevskiy1b8ecee2014-05-27 15:36:37 +1000589 *tce = tcet->table[index];
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100590
591 return H_SUCCESS;
592}
593
David Gibsonce2918c2019-03-06 15:35:37 +1100594static target_ulong h_get_tce(PowerPCCPU *cpu, SpaprMachineState *spapr,
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100595 target_ulong opcode, target_ulong *args)
596{
597 target_ulong liobn = args[0];
598 target_ulong ioba = args[1];
599 target_ulong tce = 0;
600 target_ulong ret = H_PARAMETER;
David Gibsonce2918c2019-03-06 15:35:37 +1100601 SpaprTceTable *tcet = spapr_tce_find_by_liobn(liobn);
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100602
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100603 if (tcet) {
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000604 hwaddr page_mask = IOMMU_PAGE_MASK(tcet->page_shift);
605
606 ioba &= page_mask;
607
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100608 ret = get_tce_emu(tcet, ioba, &tce);
609 if (!ret) {
610 args[0] = tce;
611 }
612 }
Alexey Kardashevskiyd9d96a32015-05-07 15:33:33 +1000613 if (SPAPR_IS_PCI_LIOBN(liobn)) {
614 trace_spapr_iommu_pci_get(liobn, ioba, ret, tce);
615 } else {
616 trace_spapr_iommu_get(liobn, ioba, ret, tce);
617 }
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100618
619 return ret;
620}
621
David Gibsonad0ebb92012-06-27 14:50:44 +1000622int spapr_dma_dt(void *fdt, int node_off, const char *propname,
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000623 uint32_t liobn, uint64_t window, uint32_t size)
David Gibsonad0ebb92012-06-27 14:50:44 +1000624{
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000625 uint32_t dma_prop[5];
626 int ret;
David Gibsonad0ebb92012-06-27 14:50:44 +1000627
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000628 dma_prop[0] = cpu_to_be32(liobn);
629 dma_prop[1] = cpu_to_be32(window >> 32);
630 dma_prop[2] = cpu_to_be32(window & 0xFFFFFFFF);
631 dma_prop[3] = 0; /* window size is 32 bits */
632 dma_prop[4] = cpu_to_be32(size);
David Gibsonad0ebb92012-06-27 14:50:44 +1000633
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000634 ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-address-cells", 2);
635 if (ret < 0) {
636 return ret;
637 }
David Gibsonad0ebb92012-06-27 14:50:44 +1000638
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000639 ret = fdt_setprop_cell(fdt, node_off, "ibm,#dma-size-cells", 2);
640 if (ret < 0) {
641 return ret;
642 }
643
644 ret = fdt_setprop(fdt, node_off, propname, dma_prop, sizeof(dma_prop));
645 if (ret < 0) {
646 return ret;
David Gibsonad0ebb92012-06-27 14:50:44 +1000647 }
648
649 return 0;
650}
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000651
652int spapr_tcet_dma_dt(void *fdt, int node_off, const char *propname,
David Gibsonce2918c2019-03-06 15:35:37 +1100653 SpaprTceTable *tcet)
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000654{
Paolo Bonzini2b7dc942013-04-10 17:30:48 +0200655 if (!tcet) {
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000656 return 0;
657 }
658
Paolo Bonzini2b7dc942013-04-10 17:30:48 +0200659 return spapr_dma_dt(fdt, node_off, propname,
Alexey Kardashevskiy650f33a2014-05-27 15:36:36 +1000660 tcet->liobn, 0, tcet->nb_table << tcet->page_shift);
Alexey Kardashevskiy5c4cbcf2012-08-07 16:10:38 +0000661}
Anthony Liguoria83000f2013-07-18 14:32:58 -0500662
663static void spapr_tce_table_class_init(ObjectClass *klass, void *data)
664{
665 DeviceClass *dc = DEVICE_CLASS(klass);
Greg Kurza931ad12017-07-25 19:59:06 +0200666 dc->realize = spapr_tce_table_realize;
Anthony Liguoria83000f2013-07-18 14:32:58 -0500667 dc->reset = spapr_tce_reset;
David Gibson5f9490d2014-12-08 13:48:02 +1100668 dc->unrealize = spapr_tce_table_unrealize;
Thomas Huth1f98e552017-08-17 16:19:16 +0200669 /* Reason: This is just an internal device for handling the hypercalls */
670 dc->user_creatable = false;
Anthony Liguoria83000f2013-07-18 14:32:58 -0500671
672 QLIST_INIT(&spapr_tce_tables);
673
674 /* hcall-tce */
675 spapr_register_hypercall(H_PUT_TCE, h_put_tce);
Laurent Dufoura0fcac92014-02-21 10:29:06 +0100676 spapr_register_hypercall(H_GET_TCE, h_get_tce);
Alexey Kardashevskiyda953242014-05-27 15:36:30 +1000677 spapr_register_hypercall(H_PUT_TCE_INDIRECT, h_put_tce_indirect);
678 spapr_register_hypercall(H_STUFF_TCE, h_stuff_tce);
Anthony Liguoria83000f2013-07-18 14:32:58 -0500679}
680
681static TypeInfo spapr_tce_table_info = {
682 .name = TYPE_SPAPR_TCE_TABLE,
683 .parent = TYPE_DEVICE,
David Gibsonce2918c2019-03-06 15:35:37 +1100684 .instance_size = sizeof(SpaprTceTable),
Anthony Liguoria83000f2013-07-18 14:32:58 -0500685 .class_init = spapr_tce_table_class_init,
Anthony Liguoria83000f2013-07-18 14:32:58 -0500686};
687
Alexey Kardashevskiy1221a472017-07-11 13:56:20 +1000688static void spapr_iommu_memory_region_class_init(ObjectClass *klass, void *data)
689{
690 IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
691
692 imrc->translate = spapr_tce_translate_iommu;
Alexey Kardashevskiy5f366662019-03-07 16:05:16 +1100693 imrc->replay = spapr_tce_replay;
Alexey Kardashevskiy1221a472017-07-11 13:56:20 +1000694 imrc->get_min_page_size = spapr_tce_get_min_page_size;
695 imrc->notify_flag_changed = spapr_tce_notify_flag_changed;
Alexey Kardashevskiy9ded7802018-02-06 11:08:24 -0700696 imrc->get_attr = spapr_tce_get_attr;
Alexey Kardashevskiy1221a472017-07-11 13:56:20 +1000697}
698
699static const TypeInfo spapr_iommu_memory_region_info = {
700 .parent = TYPE_IOMMU_MEMORY_REGION,
701 .name = TYPE_SPAPR_IOMMU_MEMORY_REGION,
702 .class_init = spapr_iommu_memory_region_class_init,
703};
704
Anthony Liguoria83000f2013-07-18 14:32:58 -0500705static void register_types(void)
706{
707 type_register_static(&spapr_tce_table_info);
Alexey Kardashevskiy1221a472017-07-11 13:56:20 +1000708 type_register_static(&spapr_iommu_memory_region_info);
Anthony Liguoria83000f2013-07-18 14:32:58 -0500709}
710
711type_init(register_types);