2 * QEMU sPAPR IOMMU (TCE) code
4 * Copyright (c) 2010 David Gibson, IBM Corporation <dwg@au1.ibm.com>
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.
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.
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/>.
20 #include "sysemu/kvm.h"
23 #include "sysemu/dma.h"
24 #include "exec/address-spaces.h"
27 #include "hw/ppc/spapr.h"
28 #include "hw/ppc/spapr_vio.h"
39 #define IOMMU_PAGE_SIZE(shift) (1ULL << (shift))
40 #define IOMMU_PAGE_MASK(shift) (~(IOMMU_PAGE_SIZE(shift) - 1))
42 static QLIST_HEAD(spapr_tce_tables
, sPAPRTCETable
) spapr_tce_tables
;
44 sPAPRTCETable
*spapr_tce_find_by_liobn(target_ulong liobn
)
48 if (liobn
& 0xFFFFFFFF00000000ULL
) {
49 hcall_dprintf("Request for out-of-bounds LIOBN 0x" TARGET_FMT_lx
"\n",
54 QLIST_FOREACH(tcet
, &spapr_tce_tables
, list
) {
55 if (tcet
->liobn
== (uint32_t)liobn
) {
63 /* Called from RCU critical section */
64 static IOMMUTLBEntry
spapr_tce_translate_iommu(MemoryRegion
*iommu
, hwaddr addr
,
67 sPAPRTCETable
*tcet
= container_of(iommu
, sPAPRTCETable
, iommu
);
70 .target_as
= &address_space_memory
,
73 .addr_mask
= ~(hwaddr
)0,
77 if ((addr
>> tcet
->page_shift
) < tcet
->nb_table
) {
78 /* Check if we are in bound */
79 hwaddr page_mask
= IOMMU_PAGE_MASK(tcet
->page_shift
);
81 tce
= tcet
->table
[addr
>> tcet
->page_shift
];
82 ret
.iova
= addr
& page_mask
;
83 ret
.translated_addr
= tce
& page_mask
;
84 ret
.addr_mask
= ~page_mask
;
85 ret
.perm
= tce
& IOMMU_RW
;
87 trace_spapr_iommu_xlate(tcet
->liobn
, addr
, ret
.iova
, ret
.perm
,
93 static int spapr_tce_table_post_load(void *opaque
, int version_id
)
95 sPAPRTCETable
*tcet
= SPAPR_TCE_TABLE(opaque
);
98 spapr_vio_set_bypass(tcet
->vdev
, tcet
->bypass
);
104 static const VMStateDescription vmstate_spapr_tce_table
= {
105 .name
= "spapr_iommu",
107 .minimum_version_id
= 2,
108 .post_load
= spapr_tce_table_post_load
,
109 .fields
= (VMStateField
[]) {
111 VMSTATE_UINT32_EQUAL(liobn
, sPAPRTCETable
),
112 VMSTATE_UINT32_EQUAL(nb_table
, sPAPRTCETable
),
115 VMSTATE_BOOL(bypass
, sPAPRTCETable
),
116 VMSTATE_VARRAY_UINT32(table
, sPAPRTCETable
, nb_table
, 0, vmstate_info_uint64
, uint64_t),
118 VMSTATE_END_OF_LIST()
122 static MemoryRegionIOMMUOps spapr_iommu_ops
= {
123 .translate
= spapr_tce_translate_iommu
,
126 static int spapr_tce_table_realize(DeviceState
*dev
)
128 sPAPRTCETable
*tcet
= SPAPR_TCE_TABLE(dev
);
129 uint64_t window_size
= (uint64_t)tcet
->nb_table
<< tcet
->page_shift
;
131 if (kvm_enabled() && !(window_size
>> 32)) {
132 tcet
->table
= kvmppc_create_spapr_tce(tcet
->liobn
,
139 size_t table_size
= tcet
->nb_table
* sizeof(uint64_t);
140 tcet
->table
= g_malloc0(table_size
);
143 trace_spapr_iommu_new_table(tcet
->liobn
, tcet
, tcet
->table
, tcet
->fd
);
145 memory_region_init_iommu(&tcet
->iommu
, OBJECT(dev
), &spapr_iommu_ops
,
147 (uint64_t)tcet
->nb_table
<< tcet
->page_shift
);
149 QLIST_INSERT_HEAD(&spapr_tce_tables
, tcet
, list
);
151 vmstate_register(DEVICE(tcet
), tcet
->liobn
, &vmstate_spapr_tce_table
,
157 sPAPRTCETable
*spapr_tce_new_table(DeviceState
*owner
, uint32_t liobn
,
166 if (spapr_tce_find_by_liobn(liobn
)) {
167 fprintf(stderr
, "Attempted to create TCE table with duplicate"
168 " LIOBN 0x%x\n", liobn
);
176 tcet
= SPAPR_TCE_TABLE(object_new(TYPE_SPAPR_TCE_TABLE
));
178 tcet
->bus_offset
= bus_offset
;
179 tcet
->page_shift
= page_shift
;
180 tcet
->nb_table
= nb_table
;
181 tcet
->vfio_accel
= vfio_accel
;
183 snprintf(tmp
, sizeof(tmp
), "tce-table-%x", liobn
);
184 object_property_add_child(OBJECT(owner
), tmp
, OBJECT(tcet
), NULL
);
186 object_property_set_bool(OBJECT(tcet
), true, "realized", NULL
);
191 static void spapr_tce_table_unrealize(DeviceState
*dev
, Error
**errp
)
193 sPAPRTCETable
*tcet
= SPAPR_TCE_TABLE(dev
);
195 QLIST_REMOVE(tcet
, list
);
197 if (!kvm_enabled() ||
198 (kvmppc_remove_spapr_tce(tcet
->table
, tcet
->fd
,
199 tcet
->nb_table
) != 0)) {
204 MemoryRegion
*spapr_tce_get_iommu(sPAPRTCETable
*tcet
)
209 static void spapr_tce_reset(DeviceState
*dev
)
211 sPAPRTCETable
*tcet
= SPAPR_TCE_TABLE(dev
);
212 size_t table_size
= tcet
->nb_table
* sizeof(uint64_t);
214 memset(tcet
->table
, 0, table_size
);
217 static target_ulong
put_tce_emu(sPAPRTCETable
*tcet
, target_ulong ioba
,
221 hwaddr page_mask
= IOMMU_PAGE_MASK(tcet
->page_shift
);
222 unsigned long index
= (ioba
- tcet
->bus_offset
) >> tcet
->page_shift
;
224 if (index
>= tcet
->nb_table
) {
225 hcall_dprintf("spapr_vio_put_tce on out-of-bounds IOBA 0x"
226 TARGET_FMT_lx
"\n", ioba
);
230 tcet
->table
[index
] = tce
;
232 entry
.target_as
= &address_space_memory
,
233 entry
.iova
= ioba
& page_mask
;
234 entry
.translated_addr
= tce
& page_mask
;
235 entry
.addr_mask
= ~page_mask
;
236 entry
.perm
= tce
& IOMMU_RW
;
237 memory_region_notify_iommu(&tcet
->iommu
, entry
);
242 static target_ulong
h_put_tce_indirect(PowerPCCPU
*cpu
,
243 sPAPREnvironment
*spapr
,
244 target_ulong opcode
, target_ulong
*args
)
247 target_ulong liobn
= args
[0];
248 target_ulong ioba
= args
[1];
249 target_ulong ioba1
= ioba
;
250 target_ulong tce_list
= args
[2];
251 target_ulong npages
= args
[3];
252 target_ulong ret
= H_PARAMETER
, tce
= 0;
253 sPAPRTCETable
*tcet
= spapr_tce_find_by_liobn(liobn
);
254 CPUState
*cs
= CPU(cpu
);
255 hwaddr page_mask
, page_size
;
261 if ((npages
> 512) || (tce_list
& SPAPR_TCE_PAGE_MASK
)) {
265 page_mask
= IOMMU_PAGE_MASK(tcet
->page_shift
);
266 page_size
= IOMMU_PAGE_SIZE(tcet
->page_shift
);
269 for (i
= 0; i
< npages
; ++i
, ioba
+= page_size
) {
270 target_ulong off
= (tce_list
& ~SPAPR_TCE_RW
) +
271 i
* sizeof(target_ulong
);
272 tce
= ldq_be_phys(cs
->as
, off
);
274 ret
= put_tce_emu(tcet
, ioba
, tce
);
280 /* Trace last successful or the first problematic entry */
282 if (SPAPR_IS_PCI_LIOBN(liobn
)) {
283 trace_spapr_iommu_pci_indirect(liobn
, ioba1
, tce_list
, i
, tce
, ret
);
285 trace_spapr_iommu_indirect(liobn
, ioba1
, tce_list
, i
, tce
, ret
);
290 static target_ulong
h_stuff_tce(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
291 target_ulong opcode
, target_ulong
*args
)
294 target_ulong liobn
= args
[0];
295 target_ulong ioba
= args
[1];
296 target_ulong tce_value
= args
[2];
297 target_ulong npages
= args
[3];
298 target_ulong ret
= H_PARAMETER
;
299 sPAPRTCETable
*tcet
= spapr_tce_find_by_liobn(liobn
);
300 hwaddr page_mask
, page_size
;
306 if (npages
> tcet
->nb_table
) {
310 page_mask
= IOMMU_PAGE_MASK(tcet
->page_shift
);
311 page_size
= IOMMU_PAGE_SIZE(tcet
->page_shift
);
314 for (i
= 0; i
< npages
; ++i
, ioba
+= page_size
) {
315 ret
= put_tce_emu(tcet
, ioba
, tce_value
);
320 if (SPAPR_IS_PCI_LIOBN(liobn
)) {
321 trace_spapr_iommu_pci_stuff(liobn
, ioba
, tce_value
, npages
, ret
);
323 trace_spapr_iommu_stuff(liobn
, ioba
, tce_value
, npages
, ret
);
329 static target_ulong
h_put_tce(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
330 target_ulong opcode
, target_ulong
*args
)
332 target_ulong liobn
= args
[0];
333 target_ulong ioba
= args
[1];
334 target_ulong tce
= args
[2];
335 target_ulong ret
= H_PARAMETER
;
336 sPAPRTCETable
*tcet
= spapr_tce_find_by_liobn(liobn
);
339 hwaddr page_mask
= IOMMU_PAGE_MASK(tcet
->page_shift
);
343 ret
= put_tce_emu(tcet
, ioba
, tce
);
345 if (SPAPR_IS_PCI_LIOBN(liobn
)) {
346 trace_spapr_iommu_pci_put(liobn
, ioba
, tce
, ret
);
348 trace_spapr_iommu_put(liobn
, ioba
, tce
, ret
);
354 static target_ulong
get_tce_emu(sPAPRTCETable
*tcet
, target_ulong ioba
,
357 unsigned long index
= (ioba
- tcet
->bus_offset
) >> tcet
->page_shift
;
359 if (index
>= tcet
->nb_table
) {
360 hcall_dprintf("spapr_iommu_get_tce on out-of-bounds IOBA 0x"
361 TARGET_FMT_lx
"\n", ioba
);
365 *tce
= tcet
->table
[index
];
370 static target_ulong
h_get_tce(PowerPCCPU
*cpu
, sPAPREnvironment
*spapr
,
371 target_ulong opcode
, target_ulong
*args
)
373 target_ulong liobn
= args
[0];
374 target_ulong ioba
= args
[1];
375 target_ulong tce
= 0;
376 target_ulong ret
= H_PARAMETER
;
377 sPAPRTCETable
*tcet
= spapr_tce_find_by_liobn(liobn
);
380 hwaddr page_mask
= IOMMU_PAGE_MASK(tcet
->page_shift
);
384 ret
= get_tce_emu(tcet
, ioba
, &tce
);
389 if (SPAPR_IS_PCI_LIOBN(liobn
)) {
390 trace_spapr_iommu_pci_get(liobn
, ioba
, ret
, tce
);
392 trace_spapr_iommu_get(liobn
, ioba
, ret
, tce
);
398 int spapr_dma_dt(void *fdt
, int node_off
, const char *propname
,
399 uint32_t liobn
, uint64_t window
, uint32_t size
)
401 uint32_t dma_prop
[5];
404 dma_prop
[0] = cpu_to_be32(liobn
);
405 dma_prop
[1] = cpu_to_be32(window
>> 32);
406 dma_prop
[2] = cpu_to_be32(window
& 0xFFFFFFFF);
407 dma_prop
[3] = 0; /* window size is 32 bits */
408 dma_prop
[4] = cpu_to_be32(size
);
410 ret
= fdt_setprop_cell(fdt
, node_off
, "ibm,#dma-address-cells", 2);
415 ret
= fdt_setprop_cell(fdt
, node_off
, "ibm,#dma-size-cells", 2);
420 ret
= fdt_setprop(fdt
, node_off
, propname
, dma_prop
, sizeof(dma_prop
));
428 int spapr_tcet_dma_dt(void *fdt
, int node_off
, const char *propname
,
435 return spapr_dma_dt(fdt
, node_off
, propname
,
436 tcet
->liobn
, 0, tcet
->nb_table
<< tcet
->page_shift
);
439 static void spapr_tce_table_class_init(ObjectClass
*klass
, void *data
)
441 DeviceClass
*dc
= DEVICE_CLASS(klass
);
442 dc
->init
= spapr_tce_table_realize
;
443 dc
->reset
= spapr_tce_reset
;
444 dc
->unrealize
= spapr_tce_table_unrealize
;
446 QLIST_INIT(&spapr_tce_tables
);
449 spapr_register_hypercall(H_PUT_TCE
, h_put_tce
);
450 spapr_register_hypercall(H_GET_TCE
, h_get_tce
);
451 spapr_register_hypercall(H_PUT_TCE_INDIRECT
, h_put_tce_indirect
);
452 spapr_register_hypercall(H_STUFF_TCE
, h_stuff_tce
);
455 static TypeInfo spapr_tce_table_info
= {
456 .name
= TYPE_SPAPR_TCE_TABLE
,
457 .parent
= TYPE_DEVICE
,
458 .instance_size
= sizeof(sPAPRTCETable
),
459 .class_init
= spapr_tce_table_class_init
,
462 static void register_types(void)
464 type_register_static(&spapr_tce_table_info
);
467 type_init(register_types
);