xref: /openbmc/qemu/hw/net/vmxnet3.c (revision 05caa062)
1 /*
2  * QEMU VMWARE VMXNET3 paravirtual NIC
3  *
4  * Copyright (c) 2012 Ravello Systems LTD (http://ravellosystems.com)
5  *
6  * Developed by Daynix Computing LTD (http://www.daynix.com)
7  *
8  * Authors:
9  * Dmitry Fleytman <dmitry@daynix.com>
10  * Tamir Shomer <tamirs@daynix.com>
11  * Yan Vugenfirer <yan@daynix.com>
12  *
13  * This work is licensed under the terms of the GNU GPL, version 2.
14  * See the COPYING file in the top-level directory.
15  *
16  */
17 
18 #include "qemu/osdep.h"
19 #include "hw/hw.h"
20 #include "hw/pci/pci.h"
21 #include "hw/qdev-properties.h"
22 #include "net/tap.h"
23 #include "net/checksum.h"
24 #include "sysemu/sysemu.h"
25 #include "qemu/bswap.h"
26 #include "qemu/log.h"
27 #include "qemu/module.h"
28 #include "hw/pci/msix.h"
29 #include "hw/pci/msi.h"
30 #include "migration/register.h"
31 #include "migration/vmstate.h"
32 
33 #include "vmxnet3.h"
34 #include "vmxnet3_defs.h"
35 #include "vmxnet_debug.h"
36 #include "vmware_utils.h"
37 #include "net_tx_pkt.h"
38 #include "net_rx_pkt.h"
39 #include "qom/object.h"
40 
41 #define PCI_DEVICE_ID_VMWARE_VMXNET3_REVISION 0x1
42 #define VMXNET3_MSIX_BAR_SIZE 0x2000
43 
44 /* Compatibility flags for migration */
45 #define VMXNET3_COMPAT_FLAG_OLD_MSI_OFFSETS_BIT 0
46 #define VMXNET3_COMPAT_FLAG_OLD_MSI_OFFSETS \
47     (1 << VMXNET3_COMPAT_FLAG_OLD_MSI_OFFSETS_BIT)
48 #define VMXNET3_COMPAT_FLAG_DISABLE_PCIE_BIT 1
49 #define VMXNET3_COMPAT_FLAG_DISABLE_PCIE \
50     (1 << VMXNET3_COMPAT_FLAG_DISABLE_PCIE_BIT)
51 
52 #define VMXNET3_EXP_EP_OFFSET (0x48)
53 #define VMXNET3_MSI_OFFSET(s) \
54     ((s)->compat_flags & VMXNET3_COMPAT_FLAG_OLD_MSI_OFFSETS ? 0x50 : 0x84)
55 #define VMXNET3_MSIX_OFFSET(s) \
56     ((s)->compat_flags & VMXNET3_COMPAT_FLAG_OLD_MSI_OFFSETS ? 0 : 0x9c)
57 #define VMXNET3_DSN_OFFSET     (0x100)
58 
59 #define VMXNET3_BAR0_IDX      (0)
60 #define VMXNET3_BAR1_IDX      (1)
61 #define VMXNET3_MSIX_BAR_IDX  (2)
62 
63 #define VMXNET3_OFF_MSIX_TABLE (0x000)
64 #define VMXNET3_OFF_MSIX_PBA(s) \
65     ((s)->compat_flags & VMXNET3_COMPAT_FLAG_OLD_MSI_OFFSETS ? 0x800 : 0x1000)
66 
67 /* Link speed in Mbps should be shifted by 16 */
68 #define VMXNET3_LINK_SPEED      (1000 << 16)
69 
70 /* Link status: 1 - up, 0 - down. */
71 #define VMXNET3_LINK_STATUS_UP  0x1
72 
73 /* Least significant bit should be set for revision and version */
74 #define VMXNET3_UPT_REVISION      0x1
75 #define VMXNET3_DEVICE_REVISION   0x1
76 
77 /* Number of interrupt vectors for non-MSIx modes */
78 #define VMXNET3_MAX_NMSIX_INTRS   (1)
79 
80 /* Macros for rings descriptors access */
81 #define VMXNET3_READ_TX_QUEUE_DESCR8(_d, dpa, field) \
82     (vmw_shmem_ld8(_d, dpa + offsetof(struct Vmxnet3_TxQueueDesc, field)))
83 
84 #define VMXNET3_WRITE_TX_QUEUE_DESCR8(_d, dpa, field, value) \
85     (vmw_shmem_st8(_d, dpa + offsetof(struct Vmxnet3_TxQueueDesc, field, value)))
86 
87 #define VMXNET3_READ_TX_QUEUE_DESCR32(_d, dpa, field) \
88     (vmw_shmem_ld32(_d, dpa + offsetof(struct Vmxnet3_TxQueueDesc, field)))
89 
90 #define VMXNET3_WRITE_TX_QUEUE_DESCR32(_d, dpa, field, value) \
91     (vmw_shmem_st32(_d, dpa + offsetof(struct Vmxnet3_TxQueueDesc, field), value))
92 
93 #define VMXNET3_READ_TX_QUEUE_DESCR64(_d, dpa, field) \
94     (vmw_shmem_ld64(_d, dpa + offsetof(struct Vmxnet3_TxQueueDesc, field)))
95 
96 #define VMXNET3_WRITE_TX_QUEUE_DESCR64(_d, dpa, field, value) \
97     (vmw_shmem_st64(_d, dpa + offsetof(struct Vmxnet3_TxQueueDesc, field), value))
98 
99 #define VMXNET3_READ_RX_QUEUE_DESCR64(_d, dpa, field) \
100     (vmw_shmem_ld64(_d, dpa + offsetof(struct Vmxnet3_RxQueueDesc, field)))
101 
102 #define VMXNET3_READ_RX_QUEUE_DESCR32(_d, dpa, field) \
103     (vmw_shmem_ld32(_d, dpa + offsetof(struct Vmxnet3_RxQueueDesc, field)))
104 
105 #define VMXNET3_WRITE_RX_QUEUE_DESCR64(_d, dpa, field, value) \
106     (vmw_shmem_st64(_d, dpa + offsetof(struct Vmxnet3_RxQueueDesc, field), value))
107 
108 #define VMXNET3_WRITE_RX_QUEUE_DESCR8(_d, dpa, field, value) \
109     (vmw_shmem_st8(_d, dpa + offsetof(struct Vmxnet3_RxQueueDesc, field), value))
110 
111 /* Macros for guest driver shared area access */
112 #define VMXNET3_READ_DRV_SHARED64(_d, shpa, field) \
113     (vmw_shmem_ld64(_d, shpa + offsetof(struct Vmxnet3_DriverShared, field)))
114 
115 #define VMXNET3_READ_DRV_SHARED32(_d, shpa, field) \
116     (vmw_shmem_ld32(_d, shpa + offsetof(struct Vmxnet3_DriverShared, field)))
117 
118 #define VMXNET3_WRITE_DRV_SHARED32(_d, shpa, field, val) \
119     (vmw_shmem_st32(_d, shpa + offsetof(struct Vmxnet3_DriverShared, field), val))
120 
121 #define VMXNET3_READ_DRV_SHARED16(_d, shpa, field) \
122     (vmw_shmem_ld16(_d, shpa + offsetof(struct Vmxnet3_DriverShared, field)))
123 
124 #define VMXNET3_READ_DRV_SHARED8(_d, shpa, field) \
125     (vmw_shmem_ld8(_d, shpa + offsetof(struct Vmxnet3_DriverShared, field)))
126 
127 #define VMXNET3_READ_DRV_SHARED(_d, shpa, field, b, l) \
128     (vmw_shmem_read(_d, shpa + offsetof(struct Vmxnet3_DriverShared, field), b, l))
129 
130 #define VMXNET_FLAG_IS_SET(field, flag) (((field) & (flag)) == (flag))
131 
132 struct VMXNET3Class {
133     PCIDeviceClass parent_class;
134     DeviceRealize parent_dc_realize;
135 };
136 typedef struct VMXNET3Class VMXNET3Class;
137 
138 DECLARE_CLASS_CHECKERS(VMXNET3Class, VMXNET3_DEVICE,
139                        TYPE_VMXNET3)
140 
141 static inline void vmxnet3_ring_init(PCIDevice *d,
142                                      Vmxnet3Ring *ring,
143                                      hwaddr pa,
144                                      uint32_t size,
145                                      uint32_t cell_size,
146                                      bool zero_region)
147 {
148     ring->pa = pa;
149     ring->size = size;
150     ring->cell_size = cell_size;
151     ring->gen = VMXNET3_INIT_GEN;
152     ring->next = 0;
153 
154     if (zero_region) {
155         vmw_shmem_set(d, pa, 0, size * cell_size);
156     }
157 }
158 
159 #define VMXNET3_RING_DUMP(macro, ring_name, ridx, r)                         \
160     macro("%s#%d: base %" PRIx64 " size %u cell_size %u gen %d next %u",  \
161           (ring_name), (ridx),                                               \
162           (r)->pa, (r)->size, (r)->cell_size, (r)->gen, (r)->next)
163 
164 static inline void vmxnet3_ring_inc(Vmxnet3Ring *ring)
165 {
166     if (++ring->next >= ring->size) {
167         ring->next = 0;
168         ring->gen ^= 1;
169     }
170 }
171 
172 static inline void vmxnet3_ring_dec(Vmxnet3Ring *ring)
173 {
174     if (ring->next-- == 0) {
175         ring->next = ring->size - 1;
176         ring->gen ^= 1;
177     }
178 }
179 
180 static inline hwaddr vmxnet3_ring_curr_cell_pa(Vmxnet3Ring *ring)
181 {
182     return ring->pa + ring->next * ring->cell_size;
183 }
184 
185 static inline void vmxnet3_ring_read_curr_cell(PCIDevice *d, Vmxnet3Ring *ring,
186                                                void *buff)
187 {
188     vmw_shmem_read(d, vmxnet3_ring_curr_cell_pa(ring), buff, ring->cell_size);
189 }
190 
191 static inline void vmxnet3_ring_write_curr_cell(PCIDevice *d, Vmxnet3Ring *ring,
192                                                 void *buff)
193 {
194     vmw_shmem_write(d, vmxnet3_ring_curr_cell_pa(ring), buff, ring->cell_size);
195 }
196 
197 static inline size_t vmxnet3_ring_curr_cell_idx(Vmxnet3Ring *ring)
198 {
199     return ring->next;
200 }
201 
202 static inline uint8_t vmxnet3_ring_curr_gen(Vmxnet3Ring *ring)
203 {
204     return ring->gen;
205 }
206 
207 /* Debug trace-related functions */
208 static inline void
209 vmxnet3_dump_tx_descr(struct Vmxnet3_TxDesc *descr)
210 {
211     VMW_PKPRN("TX DESCR: "
212               "addr %" PRIx64 ", len: %d, gen: %d, rsvd: %d, "
213               "dtype: %d, ext1: %d, msscof: %d, hlen: %d, om: %d, "
214               "eop: %d, cq: %d, ext2: %d, ti: %d, tci: %d",
215               descr->addr, descr->len, descr->gen, descr->rsvd,
216               descr->dtype, descr->ext1, descr->msscof, descr->hlen, descr->om,
217               descr->eop, descr->cq, descr->ext2, descr->ti, descr->tci);
218 }
219 
220 static inline void
221 vmxnet3_dump_virt_hdr(struct virtio_net_hdr *vhdr)
222 {
223     VMW_PKPRN("VHDR: flags 0x%x, gso_type: 0x%x, hdr_len: %d, gso_size: %d, "
224               "csum_start: %d, csum_offset: %d",
225               vhdr->flags, vhdr->gso_type, vhdr->hdr_len, vhdr->gso_size,
226               vhdr->csum_start, vhdr->csum_offset);
227 }
228 
229 static inline void
230 vmxnet3_dump_rx_descr(struct Vmxnet3_RxDesc *descr)
231 {
232     VMW_PKPRN("RX DESCR: addr %" PRIx64 ", len: %d, gen: %d, rsvd: %d, "
233               "dtype: %d, ext1: %d, btype: %d",
234               descr->addr, descr->len, descr->gen,
235               descr->rsvd, descr->dtype, descr->ext1, descr->btype);
236 }
237 
238 /* Interrupt management */
239 
240 /*
241  * This function returns sign whether interrupt line is in asserted state
242  * This depends on the type of interrupt used. For INTX interrupt line will
243  * be asserted until explicit deassertion, for MSI(X) interrupt line will
244  * be deasserted automatically due to notification semantics of the MSI(X)
245  * interrupts
246  */
247 static bool _vmxnet3_assert_interrupt_line(VMXNET3State *s, uint32_t int_idx)
248 {
249     PCIDevice *d = PCI_DEVICE(s);
250 
251     if (s->msix_used && msix_enabled(d)) {
252         VMW_IRPRN("Sending MSI-X notification for vector %u", int_idx);
253         msix_notify(d, int_idx);
254         return false;
255     }
256     if (msi_enabled(d)) {
257         VMW_IRPRN("Sending MSI notification for vector %u", int_idx);
258         msi_notify(d, int_idx);
259         return false;
260     }
261 
262     VMW_IRPRN("Asserting line for interrupt %u", int_idx);
263     pci_irq_assert(d);
264     return true;
265 }
266 
267 static void _vmxnet3_deassert_interrupt_line(VMXNET3State *s, int lidx)
268 {
269     PCIDevice *d = PCI_DEVICE(s);
270 
271     /*
272      * This function should never be called for MSI(X) interrupts
273      * because deassertion never required for message interrupts
274      */
275     assert(!s->msix_used || !msix_enabled(d));
276     /*
277      * This function should never be called for MSI(X) interrupts
278      * because deassertion never required for message interrupts
279      */
280     assert(!msi_enabled(d));
281 
282     VMW_IRPRN("Deasserting line for interrupt %u", lidx);
283     pci_irq_deassert(d);
284 }
285 
286 static void vmxnet3_update_interrupt_line_state(VMXNET3State *s, int lidx)
287 {
288     if (!s->interrupt_states[lidx].is_pending &&
289        s->interrupt_states[lidx].is_asserted) {
290         VMW_IRPRN("New interrupt line state for index %d is DOWN", lidx);
291         _vmxnet3_deassert_interrupt_line(s, lidx);
292         s->interrupt_states[lidx].is_asserted = false;
293         return;
294     }
295 
296     if (s->interrupt_states[lidx].is_pending &&
297        !s->interrupt_states[lidx].is_masked &&
298        !s->interrupt_states[lidx].is_asserted) {
299         VMW_IRPRN("New interrupt line state for index %d is UP", lidx);
300         s->interrupt_states[lidx].is_asserted =
301             _vmxnet3_assert_interrupt_line(s, lidx);
302         s->interrupt_states[lidx].is_pending = false;
303         return;
304     }
305 }
306 
307 static void vmxnet3_trigger_interrupt(VMXNET3State *s, int lidx)
308 {
309     PCIDevice *d = PCI_DEVICE(s);
310     s->interrupt_states[lidx].is_pending = true;
311     vmxnet3_update_interrupt_line_state(s, lidx);
312 
313     if (s->msix_used && msix_enabled(d) && s->auto_int_masking) {
314         goto do_automask;
315     }
316 
317     if (msi_enabled(d) && s->auto_int_masking) {
318         goto do_automask;
319     }
320 
321     return;
322 
323 do_automask:
324     s->interrupt_states[lidx].is_masked = true;
325     vmxnet3_update_interrupt_line_state(s, lidx);
326 }
327 
328 static bool vmxnet3_interrupt_asserted(VMXNET3State *s, int lidx)
329 {
330     return s->interrupt_states[lidx].is_asserted;
331 }
332 
333 static void vmxnet3_clear_interrupt(VMXNET3State *s, int int_idx)
334 {
335     s->interrupt_states[int_idx].is_pending = false;
336     if (s->auto_int_masking) {
337         s->interrupt_states[int_idx].is_masked = true;
338     }
339     vmxnet3_update_interrupt_line_state(s, int_idx);
340 }
341 
342 static void
343 vmxnet3_on_interrupt_mask_changed(VMXNET3State *s, int lidx, bool is_masked)
344 {
345     s->interrupt_states[lidx].is_masked = is_masked;
346     vmxnet3_update_interrupt_line_state(s, lidx);
347 }
348 
349 static bool vmxnet3_verify_driver_magic(PCIDevice *d, hwaddr dshmem)
350 {
351     return (VMXNET3_READ_DRV_SHARED32(d, dshmem, magic) == VMXNET3_REV1_MAGIC);
352 }
353 
354 #define VMXNET3_GET_BYTE(x, byte_num) (((x) >> (byte_num)*8) & 0xFF)
355 #define VMXNET3_MAKE_BYTE(byte_num, val) \
356     (((uint32_t)((val) & 0xFF)) << (byte_num)*8)
357 
358 static void vmxnet3_set_variable_mac(VMXNET3State *s, uint32_t h, uint32_t l)
359 {
360     s->conf.macaddr.a[0] = VMXNET3_GET_BYTE(l,  0);
361     s->conf.macaddr.a[1] = VMXNET3_GET_BYTE(l,  1);
362     s->conf.macaddr.a[2] = VMXNET3_GET_BYTE(l,  2);
363     s->conf.macaddr.a[3] = VMXNET3_GET_BYTE(l,  3);
364     s->conf.macaddr.a[4] = VMXNET3_GET_BYTE(h, 0);
365     s->conf.macaddr.a[5] = VMXNET3_GET_BYTE(h, 1);
366 
367     VMW_CFPRN("Variable MAC: " MAC_FMT, MAC_ARG(s->conf.macaddr.a));
368 
369     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
370 }
371 
372 static uint64_t vmxnet3_get_mac_low(MACAddr *addr)
373 {
374     return VMXNET3_MAKE_BYTE(0, addr->a[0]) |
375            VMXNET3_MAKE_BYTE(1, addr->a[1]) |
376            VMXNET3_MAKE_BYTE(2, addr->a[2]) |
377            VMXNET3_MAKE_BYTE(3, addr->a[3]);
378 }
379 
380 static uint64_t vmxnet3_get_mac_high(MACAddr *addr)
381 {
382     return VMXNET3_MAKE_BYTE(0, addr->a[4]) |
383            VMXNET3_MAKE_BYTE(1, addr->a[5]);
384 }
385 
386 static void
387 vmxnet3_inc_tx_consumption_counter(VMXNET3State *s, int qidx)
388 {
389     vmxnet3_ring_inc(&s->txq_descr[qidx].tx_ring);
390 }
391 
392 static inline void
393 vmxnet3_inc_rx_consumption_counter(VMXNET3State *s, int qidx, int ridx)
394 {
395     vmxnet3_ring_inc(&s->rxq_descr[qidx].rx_ring[ridx]);
396 }
397 
398 static inline void
399 vmxnet3_inc_tx_completion_counter(VMXNET3State *s, int qidx)
400 {
401     vmxnet3_ring_inc(&s->txq_descr[qidx].comp_ring);
402 }
403 
404 static void
405 vmxnet3_inc_rx_completion_counter(VMXNET3State *s, int qidx)
406 {
407     vmxnet3_ring_inc(&s->rxq_descr[qidx].comp_ring);
408 }
409 
410 static void
411 vmxnet3_dec_rx_completion_counter(VMXNET3State *s, int qidx)
412 {
413     vmxnet3_ring_dec(&s->rxq_descr[qidx].comp_ring);
414 }
415 
416 static void vmxnet3_complete_packet(VMXNET3State *s, int qidx, uint32_t tx_ridx)
417 {
418     struct Vmxnet3_TxCompDesc txcq_descr;
419     PCIDevice *d = PCI_DEVICE(s);
420 
421     VMXNET3_RING_DUMP(VMW_RIPRN, "TXC", qidx, &s->txq_descr[qidx].comp_ring);
422 
423     memset(&txcq_descr, 0, sizeof(txcq_descr));
424     txcq_descr.txdIdx = tx_ridx;
425     txcq_descr.gen = vmxnet3_ring_curr_gen(&s->txq_descr[qidx].comp_ring);
426     txcq_descr.val1 = cpu_to_le32(txcq_descr.val1);
427     txcq_descr.val2 = cpu_to_le32(txcq_descr.val2);
428     vmxnet3_ring_write_curr_cell(d, &s->txq_descr[qidx].comp_ring, &txcq_descr);
429 
430     /* Flush changes in TX descriptor before changing the counter value */
431     smp_wmb();
432 
433     vmxnet3_inc_tx_completion_counter(s, qidx);
434     vmxnet3_trigger_interrupt(s, s->txq_descr[qidx].intr_idx);
435 }
436 
437 static bool
438 vmxnet3_setup_tx_offloads(VMXNET3State *s)
439 {
440     switch (s->offload_mode) {
441     case VMXNET3_OM_NONE:
442         return net_tx_pkt_build_vheader(s->tx_pkt, false, false, 0);
443 
444     case VMXNET3_OM_CSUM:
445         VMW_PKPRN("L4 CSO requested\n");
446         return net_tx_pkt_build_vheader(s->tx_pkt, false, true, 0);
447 
448     case VMXNET3_OM_TSO:
449         VMW_PKPRN("GSO offload requested.");
450         if (!net_tx_pkt_build_vheader(s->tx_pkt, true, true,
451             s->cso_or_gso_size)) {
452             return false;
453         }
454         net_tx_pkt_update_ip_checksums(s->tx_pkt);
455         break;
456 
457     default:
458         g_assert_not_reached();
459         return false;
460     }
461 
462     return true;
463 }
464 
465 static void
466 vmxnet3_tx_retrieve_metadata(VMXNET3State *s,
467                              const struct Vmxnet3_TxDesc *txd)
468 {
469     s->offload_mode = txd->om;
470     s->cso_or_gso_size = txd->msscof;
471     s->tci = txd->tci;
472     s->needs_vlan = txd->ti;
473 }
474 
475 typedef enum {
476     VMXNET3_PKT_STATUS_OK,
477     VMXNET3_PKT_STATUS_ERROR,
478     VMXNET3_PKT_STATUS_DISCARD,/* only for tx */
479     VMXNET3_PKT_STATUS_OUT_OF_BUF /* only for rx */
480 } Vmxnet3PktStatus;
481 
482 static void
483 vmxnet3_on_tx_done_update_stats(VMXNET3State *s, int qidx,
484     Vmxnet3PktStatus status)
485 {
486     size_t tot_len = net_tx_pkt_get_total_len(s->tx_pkt);
487     struct UPT1_TxStats *stats = &s->txq_descr[qidx].txq_stats;
488 
489     switch (status) {
490     case VMXNET3_PKT_STATUS_OK:
491         switch (net_tx_pkt_get_packet_type(s->tx_pkt)) {
492         case ETH_PKT_BCAST:
493             stats->bcastPktsTxOK++;
494             stats->bcastBytesTxOK += tot_len;
495             break;
496         case ETH_PKT_MCAST:
497             stats->mcastPktsTxOK++;
498             stats->mcastBytesTxOK += tot_len;
499             break;
500         case ETH_PKT_UCAST:
501             stats->ucastPktsTxOK++;
502             stats->ucastBytesTxOK += tot_len;
503             break;
504         default:
505             g_assert_not_reached();
506         }
507 
508         if (s->offload_mode == VMXNET3_OM_TSO) {
509             /*
510              * According to VMWARE headers this statistic is a number
511              * of packets after segmentation but since we don't have
512              * this information in QEMU model, the best we can do is to
513              * provide number of non-segmented packets
514              */
515             stats->TSOPktsTxOK++;
516             stats->TSOBytesTxOK += tot_len;
517         }
518         break;
519 
520     case VMXNET3_PKT_STATUS_DISCARD:
521         stats->pktsTxDiscard++;
522         break;
523 
524     case VMXNET3_PKT_STATUS_ERROR:
525         stats->pktsTxError++;
526         break;
527 
528     default:
529         g_assert_not_reached();
530     }
531 }
532 
533 static void
534 vmxnet3_on_rx_done_update_stats(VMXNET3State *s,
535                                 int qidx,
536                                 Vmxnet3PktStatus status)
537 {
538     struct UPT1_RxStats *stats = &s->rxq_descr[qidx].rxq_stats;
539     size_t tot_len = net_rx_pkt_get_total_len(s->rx_pkt);
540 
541     switch (status) {
542     case VMXNET3_PKT_STATUS_OUT_OF_BUF:
543         stats->pktsRxOutOfBuf++;
544         break;
545 
546     case VMXNET3_PKT_STATUS_ERROR:
547         stats->pktsRxError++;
548         break;
549     case VMXNET3_PKT_STATUS_OK:
550         switch (net_rx_pkt_get_packet_type(s->rx_pkt)) {
551         case ETH_PKT_BCAST:
552             stats->bcastPktsRxOK++;
553             stats->bcastBytesRxOK += tot_len;
554             break;
555         case ETH_PKT_MCAST:
556             stats->mcastPktsRxOK++;
557             stats->mcastBytesRxOK += tot_len;
558             break;
559         case ETH_PKT_UCAST:
560             stats->ucastPktsRxOK++;
561             stats->ucastBytesRxOK += tot_len;
562             break;
563         default:
564             g_assert_not_reached();
565         }
566 
567         if (tot_len > s->mtu) {
568             stats->LROPktsRxOK++;
569             stats->LROBytesRxOK += tot_len;
570         }
571         break;
572     default:
573         g_assert_not_reached();
574     }
575 }
576 
577 static inline void
578 vmxnet3_ring_read_curr_txdesc(PCIDevice *pcidev, Vmxnet3Ring *ring,
579                               struct Vmxnet3_TxDesc *txd)
580 {
581     vmxnet3_ring_read_curr_cell(pcidev, ring, txd);
582     txd->addr = le64_to_cpu(txd->addr);
583     txd->val1 = le32_to_cpu(txd->val1);
584     txd->val2 = le32_to_cpu(txd->val2);
585 }
586 
587 static inline bool
588 vmxnet3_pop_next_tx_descr(VMXNET3State *s,
589                           int qidx,
590                           struct Vmxnet3_TxDesc *txd,
591                           uint32_t *descr_idx)
592 {
593     Vmxnet3Ring *ring = &s->txq_descr[qidx].tx_ring;
594     PCIDevice *d = PCI_DEVICE(s);
595 
596     vmxnet3_ring_read_curr_txdesc(d, ring, txd);
597     if (txd->gen == vmxnet3_ring_curr_gen(ring)) {
598         /* Only read after generation field verification */
599         smp_rmb();
600         /* Re-read to be sure we got the latest version */
601         vmxnet3_ring_read_curr_txdesc(d, ring, txd);
602         VMXNET3_RING_DUMP(VMW_RIPRN, "TX", qidx, ring);
603         *descr_idx = vmxnet3_ring_curr_cell_idx(ring);
604         vmxnet3_inc_tx_consumption_counter(s, qidx);
605         return true;
606     }
607 
608     return false;
609 }
610 
611 static bool
612 vmxnet3_send_packet(VMXNET3State *s, uint32_t qidx)
613 {
614     Vmxnet3PktStatus status = VMXNET3_PKT_STATUS_OK;
615 
616     if (!vmxnet3_setup_tx_offloads(s)) {
617         status = VMXNET3_PKT_STATUS_ERROR;
618         goto func_exit;
619     }
620 
621     /* debug prints */
622     vmxnet3_dump_virt_hdr(net_tx_pkt_get_vhdr(s->tx_pkt));
623     net_tx_pkt_dump(s->tx_pkt);
624 
625     if (!net_tx_pkt_send(s->tx_pkt, qemu_get_queue(s->nic))) {
626         status = VMXNET3_PKT_STATUS_DISCARD;
627         goto func_exit;
628     }
629 
630 func_exit:
631     vmxnet3_on_tx_done_update_stats(s, qidx, status);
632     return (status == VMXNET3_PKT_STATUS_OK);
633 }
634 
635 static void vmxnet3_process_tx_queue(VMXNET3State *s, int qidx)
636 {
637     struct Vmxnet3_TxDesc txd;
638     uint32_t txd_idx;
639     uint32_t data_len;
640     hwaddr data_pa;
641 
642     for (;;) {
643         if (!vmxnet3_pop_next_tx_descr(s, qidx, &txd, &txd_idx)) {
644             break;
645         }
646 
647         vmxnet3_dump_tx_descr(&txd);
648 
649         if (!s->skip_current_tx_pkt) {
650             data_len = (txd.len > 0) ? txd.len : VMXNET3_MAX_TX_BUF_SIZE;
651             data_pa = txd.addr;
652 
653             if (!net_tx_pkt_add_raw_fragment_pci(s->tx_pkt, PCI_DEVICE(s),
654                                                  data_pa, data_len)) {
655                 s->skip_current_tx_pkt = true;
656             }
657         }
658 
659         if (s->tx_sop) {
660             vmxnet3_tx_retrieve_metadata(s, &txd);
661             s->tx_sop = false;
662         }
663 
664         if (txd.eop) {
665             if (!s->skip_current_tx_pkt && net_tx_pkt_parse(s->tx_pkt)) {
666                 if (s->needs_vlan) {
667                     net_tx_pkt_setup_vlan_header(s->tx_pkt, s->tci);
668                 }
669 
670                 vmxnet3_send_packet(s, qidx);
671             } else {
672                 vmxnet3_on_tx_done_update_stats(s, qidx,
673                                                 VMXNET3_PKT_STATUS_ERROR);
674             }
675 
676             vmxnet3_complete_packet(s, qidx, txd_idx);
677             s->tx_sop = true;
678             s->skip_current_tx_pkt = false;
679             net_tx_pkt_reset(s->tx_pkt,
680                              net_tx_pkt_unmap_frag_pci, PCI_DEVICE(s));
681         }
682     }
683 
684     net_tx_pkt_reset(s->tx_pkt, net_tx_pkt_unmap_frag_pci, PCI_DEVICE(s));
685 }
686 
687 static inline void
688 vmxnet3_read_next_rx_descr(VMXNET3State *s, int qidx, int ridx,
689                            struct Vmxnet3_RxDesc *dbuf, uint32_t *didx)
690 {
691     PCIDevice *d = PCI_DEVICE(s);
692 
693     Vmxnet3Ring *ring = &s->rxq_descr[qidx].rx_ring[ridx];
694     *didx = vmxnet3_ring_curr_cell_idx(ring);
695     vmxnet3_ring_read_curr_cell(d, ring, dbuf);
696     dbuf->addr = le64_to_cpu(dbuf->addr);
697     dbuf->val1 = le32_to_cpu(dbuf->val1);
698     dbuf->ext1 = le32_to_cpu(dbuf->ext1);
699 }
700 
701 static inline uint8_t
702 vmxnet3_get_rx_ring_gen(VMXNET3State *s, int qidx, int ridx)
703 {
704     return s->rxq_descr[qidx].rx_ring[ridx].gen;
705 }
706 
707 static inline hwaddr
708 vmxnet3_pop_rxc_descr(VMXNET3State *s, int qidx, uint32_t *descr_gen)
709 {
710     uint8_t ring_gen;
711     struct Vmxnet3_RxCompDesc rxcd;
712 
713     hwaddr daddr =
714         vmxnet3_ring_curr_cell_pa(&s->rxq_descr[qidx].comp_ring);
715 
716     pci_dma_read(PCI_DEVICE(s),
717                  daddr, &rxcd, sizeof(struct Vmxnet3_RxCompDesc));
718     rxcd.val1 = le32_to_cpu(rxcd.val1);
719     rxcd.val2 = le32_to_cpu(rxcd.val2);
720     rxcd.val3 = le32_to_cpu(rxcd.val3);
721     ring_gen = vmxnet3_ring_curr_gen(&s->rxq_descr[qidx].comp_ring);
722 
723     if (rxcd.gen != ring_gen) {
724         *descr_gen = ring_gen;
725         vmxnet3_inc_rx_completion_counter(s, qidx);
726         return daddr;
727     }
728 
729     return 0;
730 }
731 
732 static inline void
733 vmxnet3_revert_rxc_descr(VMXNET3State *s, int qidx)
734 {
735     vmxnet3_dec_rx_completion_counter(s, qidx);
736 }
737 
738 #define RXQ_IDX      (0)
739 #define RX_HEAD_BODY_RING (0)
740 #define RX_BODY_ONLY_RING (1)
741 
742 static bool
743 vmxnet3_get_next_head_rx_descr(VMXNET3State *s,
744                                struct Vmxnet3_RxDesc *descr_buf,
745                                uint32_t *descr_idx,
746                                uint32_t *ridx)
747 {
748     for (;;) {
749         uint32_t ring_gen;
750         vmxnet3_read_next_rx_descr(s, RXQ_IDX, RX_HEAD_BODY_RING,
751                                    descr_buf, descr_idx);
752 
753         /* If no more free descriptors - return */
754         ring_gen = vmxnet3_get_rx_ring_gen(s, RXQ_IDX, RX_HEAD_BODY_RING);
755         if (descr_buf->gen != ring_gen) {
756             return false;
757         }
758 
759         /* Only read after generation field verification */
760         smp_rmb();
761         /* Re-read to be sure we got the latest version */
762         vmxnet3_read_next_rx_descr(s, RXQ_IDX, RX_HEAD_BODY_RING,
763                                    descr_buf, descr_idx);
764 
765         /* Mark current descriptor as used/skipped */
766         vmxnet3_inc_rx_consumption_counter(s, RXQ_IDX, RX_HEAD_BODY_RING);
767 
768         /* If this is what we are looking for - return */
769         if (descr_buf->btype == VMXNET3_RXD_BTYPE_HEAD) {
770             *ridx = RX_HEAD_BODY_RING;
771             return true;
772         }
773     }
774 }
775 
776 static bool
777 vmxnet3_get_next_body_rx_descr(VMXNET3State *s,
778                                struct Vmxnet3_RxDesc *d,
779                                uint32_t *didx,
780                                uint32_t *ridx)
781 {
782     vmxnet3_read_next_rx_descr(s, RXQ_IDX, RX_HEAD_BODY_RING, d, didx);
783 
784     /* Try to find corresponding descriptor in head/body ring */
785     if (d->gen == vmxnet3_get_rx_ring_gen(s, RXQ_IDX, RX_HEAD_BODY_RING)) {
786         /* Only read after generation field verification */
787         smp_rmb();
788         /* Re-read to be sure we got the latest version */
789         vmxnet3_read_next_rx_descr(s, RXQ_IDX, RX_HEAD_BODY_RING, d, didx);
790         if (d->btype == VMXNET3_RXD_BTYPE_BODY) {
791             vmxnet3_inc_rx_consumption_counter(s, RXQ_IDX, RX_HEAD_BODY_RING);
792             *ridx = RX_HEAD_BODY_RING;
793             return true;
794         }
795     }
796 
797     /*
798      * If there is no free descriptors on head/body ring or next free
799      * descriptor is a head descriptor switch to body only ring
800      */
801     vmxnet3_read_next_rx_descr(s, RXQ_IDX, RX_BODY_ONLY_RING, d, didx);
802 
803     /* If no more free descriptors - return */
804     if (d->gen == vmxnet3_get_rx_ring_gen(s, RXQ_IDX, RX_BODY_ONLY_RING)) {
805         /* Only read after generation field verification */
806         smp_rmb();
807         /* Re-read to be sure we got the latest version */
808         vmxnet3_read_next_rx_descr(s, RXQ_IDX, RX_BODY_ONLY_RING, d, didx);
809         assert(d->btype == VMXNET3_RXD_BTYPE_BODY);
810         *ridx = RX_BODY_ONLY_RING;
811         vmxnet3_inc_rx_consumption_counter(s, RXQ_IDX, RX_BODY_ONLY_RING);
812         return true;
813     }
814 
815     return false;
816 }
817 
818 static inline bool
819 vmxnet3_get_next_rx_descr(VMXNET3State *s, bool is_head,
820                           struct Vmxnet3_RxDesc *descr_buf,
821                           uint32_t *descr_idx,
822                           uint32_t *ridx)
823 {
824     if (is_head || !s->rx_packets_compound) {
825         return vmxnet3_get_next_head_rx_descr(s, descr_buf, descr_idx, ridx);
826     } else {
827         return vmxnet3_get_next_body_rx_descr(s, descr_buf, descr_idx, ridx);
828     }
829 }
830 
831 /* In case packet was csum offloaded (either NEEDS_CSUM or DATA_VALID),
832  * the implementation always passes an RxCompDesc with a "Checksum
833  * calculated and found correct" to the OS (cnc=0 and tuc=1, see
834  * vmxnet3_rx_update_descr). This emulates the observed ESXi behavior.
835  *
836  * Therefore, if packet has the NEEDS_CSUM set, we must calculate
837  * and place a fully computed checksum into the tcp/udp header.
838  * Otherwise, the OS driver will receive a checksum-correct indication
839  * (CHECKSUM_UNNECESSARY), but with the actual tcp/udp checksum field
840  * having just the pseudo header csum value.
841  *
842  * While this is not a problem if packet is destined for local delivery,
843  * in the case the host OS performs forwarding, it will forward an
844  * incorrectly checksummed packet.
845  */
846 static void vmxnet3_rx_need_csum_calculate(struct NetRxPkt *pkt,
847                                            const void *pkt_data,
848                                            size_t pkt_len)
849 {
850     struct virtio_net_hdr *vhdr;
851     bool hasip4, hasip6;
852     EthL4HdrProto l4hdr_proto;
853     uint8_t *data;
854     int len;
855 
856     vhdr = net_rx_pkt_get_vhdr(pkt);
857     if (!VMXNET_FLAG_IS_SET(vhdr->flags, VIRTIO_NET_HDR_F_NEEDS_CSUM)) {
858         return;
859     }
860 
861     net_rx_pkt_get_protocols(pkt, &hasip4, &hasip6, &l4hdr_proto);
862     if (!(hasip4 || hasip6) ||
863         (l4hdr_proto != ETH_L4_HDR_PROTO_TCP &&
864          l4hdr_proto != ETH_L4_HDR_PROTO_UDP)) {
865         return;
866     }
867 
868     vmxnet3_dump_virt_hdr(vhdr);
869 
870     /* Validate packet len: csum_start + scum_offset + length of csum field */
871     if (pkt_len < (vhdr->csum_start + vhdr->csum_offset + 2)) {
872         VMW_PKPRN("packet len:%zu < csum_start(%d) + csum_offset(%d) + 2, "
873                   "cannot calculate checksum",
874                   pkt_len, vhdr->csum_start, vhdr->csum_offset);
875         return;
876     }
877 
878     data = (uint8_t *)pkt_data + vhdr->csum_start;
879     len = pkt_len - vhdr->csum_start;
880     /* Put the checksum obtained into the packet */
881     stw_be_p(data + vhdr->csum_offset,
882              net_checksum_finish_nozero(net_checksum_add(len, data)));
883 
884     vhdr->flags &= ~VIRTIO_NET_HDR_F_NEEDS_CSUM;
885     vhdr->flags |= VIRTIO_NET_HDR_F_DATA_VALID;
886 }
887 
888 static void vmxnet3_rx_update_descr(struct NetRxPkt *pkt,
889     struct Vmxnet3_RxCompDesc *rxcd)
890 {
891     int csum_ok, is_gso;
892     bool hasip4, hasip6;
893     EthL4HdrProto l4hdr_proto;
894     struct virtio_net_hdr *vhdr;
895     uint8_t offload_type;
896 
897     if (net_rx_pkt_is_vlan_stripped(pkt)) {
898         rxcd->ts = 1;
899         rxcd->tci = net_rx_pkt_get_vlan_tag(pkt);
900     }
901 
902     vhdr = net_rx_pkt_get_vhdr(pkt);
903     /*
904      * Checksum is valid when lower level tell so or when lower level
905      * requires checksum offload telling that packet produced/bridged
906      * locally and did travel over network after last checksum calculation
907      * or production
908      */
909     csum_ok = VMXNET_FLAG_IS_SET(vhdr->flags, VIRTIO_NET_HDR_F_DATA_VALID) ||
910               VMXNET_FLAG_IS_SET(vhdr->flags, VIRTIO_NET_HDR_F_NEEDS_CSUM);
911 
912     offload_type = vhdr->gso_type & ~VIRTIO_NET_HDR_GSO_ECN;
913     is_gso = (offload_type != VIRTIO_NET_HDR_GSO_NONE) ? 1 : 0;
914 
915     if (!csum_ok && !is_gso) {
916         goto nocsum;
917     }
918 
919     net_rx_pkt_get_protocols(pkt, &hasip4, &hasip6, &l4hdr_proto);
920     if ((l4hdr_proto != ETH_L4_HDR_PROTO_TCP &&
921          l4hdr_proto != ETH_L4_HDR_PROTO_UDP) ||
922         (!hasip4 && !hasip6)) {
923         goto nocsum;
924     }
925 
926     rxcd->cnc = 0;
927     rxcd->v4 = hasip4 ? 1 : 0;
928     rxcd->v6 = hasip6 ? 1 : 0;
929     rxcd->tcp = l4hdr_proto == ETH_L4_HDR_PROTO_TCP;
930     rxcd->udp = l4hdr_proto == ETH_L4_HDR_PROTO_UDP;
931     rxcd->fcs = rxcd->tuc = rxcd->ipc = 1;
932     return;
933 
934 nocsum:
935     rxcd->cnc = 1;
936     return;
937 }
938 
939 static void
940 vmxnet3_pci_dma_writev(PCIDevice *pci_dev,
941                        const struct iovec *iov,
942                        size_t start_iov_off,
943                        hwaddr target_addr,
944                        size_t bytes_to_copy)
945 {
946     size_t curr_off = 0;
947     size_t copied = 0;
948 
949     while (bytes_to_copy) {
950         if (start_iov_off < (curr_off + iov->iov_len)) {
951             size_t chunk_len =
952                 MIN((curr_off + iov->iov_len) - start_iov_off, bytes_to_copy);
953 
954             pci_dma_write(pci_dev, target_addr + copied,
955                           iov->iov_base + start_iov_off - curr_off,
956                           chunk_len);
957 
958             copied += chunk_len;
959             start_iov_off += chunk_len;
960             curr_off = start_iov_off;
961             bytes_to_copy -= chunk_len;
962         } else {
963             curr_off += iov->iov_len;
964         }
965         iov++;
966     }
967 }
968 
969 static void
970 vmxnet3_pci_dma_write_rxcd(PCIDevice *pcidev, dma_addr_t pa,
971                            struct Vmxnet3_RxCompDesc *rxcd)
972 {
973     rxcd->val1 = cpu_to_le32(rxcd->val1);
974     rxcd->val2 = cpu_to_le32(rxcd->val2);
975     rxcd->val3 = cpu_to_le32(rxcd->val3);
976     pci_dma_write(pcidev, pa, rxcd, sizeof(*rxcd));
977 }
978 
979 static bool
980 vmxnet3_indicate_packet(VMXNET3State *s)
981 {
982     struct Vmxnet3_RxDesc rxd;
983     PCIDevice *d = PCI_DEVICE(s);
984     bool is_head = true;
985     uint32_t rxd_idx;
986     uint32_t rx_ridx = 0;
987 
988     struct Vmxnet3_RxCompDesc rxcd;
989     uint32_t new_rxcd_gen = VMXNET3_INIT_GEN;
990     hwaddr new_rxcd_pa = 0;
991     hwaddr ready_rxcd_pa = 0;
992     struct iovec *data = net_rx_pkt_get_iovec(s->rx_pkt);
993     size_t bytes_copied = 0;
994     size_t bytes_left = net_rx_pkt_get_total_len(s->rx_pkt);
995     uint16_t num_frags = 0;
996     size_t chunk_size;
997 
998     net_rx_pkt_dump(s->rx_pkt);
999 
1000     while (bytes_left > 0) {
1001 
1002         /* cannot add more frags to packet */
1003         if (num_frags == s->max_rx_frags) {
1004             break;
1005         }
1006 
1007         new_rxcd_pa = vmxnet3_pop_rxc_descr(s, RXQ_IDX, &new_rxcd_gen);
1008         if (!new_rxcd_pa) {
1009             break;
1010         }
1011 
1012         if (!vmxnet3_get_next_rx_descr(s, is_head, &rxd, &rxd_idx, &rx_ridx)) {
1013             break;
1014         }
1015 
1016         chunk_size = MIN(bytes_left, rxd.len);
1017         vmxnet3_pci_dma_writev(d, data, bytes_copied, rxd.addr, chunk_size);
1018         bytes_copied += chunk_size;
1019         bytes_left -= chunk_size;
1020 
1021         vmxnet3_dump_rx_descr(&rxd);
1022 
1023         if (ready_rxcd_pa != 0) {
1024             vmxnet3_pci_dma_write_rxcd(d, ready_rxcd_pa, &rxcd);
1025         }
1026 
1027         memset(&rxcd, 0, sizeof(struct Vmxnet3_RxCompDesc));
1028         rxcd.rxdIdx = rxd_idx;
1029         rxcd.len = chunk_size;
1030         rxcd.sop = is_head;
1031         rxcd.gen = new_rxcd_gen;
1032         rxcd.rqID = RXQ_IDX + rx_ridx * s->rxq_num;
1033 
1034         if (bytes_left == 0) {
1035             vmxnet3_rx_update_descr(s->rx_pkt, &rxcd);
1036         }
1037 
1038         VMW_RIPRN("RX Completion descriptor: rxRing: %lu rxIdx %lu len %lu "
1039                   "sop %d csum_correct %lu",
1040                   (unsigned long) rx_ridx,
1041                   (unsigned long) rxcd.rxdIdx,
1042                   (unsigned long) rxcd.len,
1043                   (int) rxcd.sop,
1044                   (unsigned long) rxcd.tuc);
1045 
1046         is_head = false;
1047         ready_rxcd_pa = new_rxcd_pa;
1048         new_rxcd_pa = 0;
1049         num_frags++;
1050     }
1051 
1052     if (ready_rxcd_pa != 0) {
1053         rxcd.eop = 1;
1054         rxcd.err = (bytes_left != 0);
1055 
1056         vmxnet3_pci_dma_write_rxcd(d, ready_rxcd_pa, &rxcd);
1057 
1058         /* Flush RX descriptor changes */
1059         smp_wmb();
1060     }
1061 
1062     if (new_rxcd_pa != 0) {
1063         vmxnet3_revert_rxc_descr(s, RXQ_IDX);
1064     }
1065 
1066     vmxnet3_trigger_interrupt(s, s->rxq_descr[RXQ_IDX].intr_idx);
1067 
1068     if (bytes_left == 0) {
1069         vmxnet3_on_rx_done_update_stats(s, RXQ_IDX, VMXNET3_PKT_STATUS_OK);
1070         return true;
1071     } else if (num_frags == s->max_rx_frags) {
1072         vmxnet3_on_rx_done_update_stats(s, RXQ_IDX, VMXNET3_PKT_STATUS_ERROR);
1073         return false;
1074     } else {
1075         vmxnet3_on_rx_done_update_stats(s, RXQ_IDX,
1076                                         VMXNET3_PKT_STATUS_OUT_OF_BUF);
1077         return false;
1078     }
1079 }
1080 
1081 static void
1082 vmxnet3_io_bar0_write(void *opaque, hwaddr addr,
1083                       uint64_t val, unsigned size)
1084 {
1085     VMXNET3State *s = opaque;
1086 
1087     if (!s->device_active) {
1088         return;
1089     }
1090 
1091     if (VMW_IS_MULTIREG_ADDR(addr, VMXNET3_REG_TXPROD,
1092                         VMXNET3_DEVICE_MAX_TX_QUEUES, VMXNET3_REG_ALIGN)) {
1093         int tx_queue_idx =
1094             VMW_MULTIREG_IDX_BY_ADDR(addr, VMXNET3_REG_TXPROD,
1095                                      VMXNET3_REG_ALIGN);
1096         if (tx_queue_idx <= s->txq_num) {
1097             vmxnet3_process_tx_queue(s, tx_queue_idx);
1098         } else {
1099             qemu_log_mask(LOG_GUEST_ERROR, "vmxnet3: Illegal TX queue %d/%d\n",
1100                           tx_queue_idx, s->txq_num);
1101         }
1102         return;
1103     }
1104 
1105     if (VMW_IS_MULTIREG_ADDR(addr, VMXNET3_REG_IMR,
1106                         VMXNET3_MAX_INTRS, VMXNET3_REG_ALIGN)) {
1107         int l = VMW_MULTIREG_IDX_BY_ADDR(addr, VMXNET3_REG_IMR,
1108                                          VMXNET3_REG_ALIGN);
1109 
1110         VMW_CBPRN("Interrupt mask for line %d written: 0x%" PRIx64, l, val);
1111 
1112         vmxnet3_on_interrupt_mask_changed(s, l, val);
1113         return;
1114     }
1115 
1116     if (VMW_IS_MULTIREG_ADDR(addr, VMXNET3_REG_RXPROD,
1117                         VMXNET3_DEVICE_MAX_RX_QUEUES, VMXNET3_REG_ALIGN) ||
1118        VMW_IS_MULTIREG_ADDR(addr, VMXNET3_REG_RXPROD2,
1119                         VMXNET3_DEVICE_MAX_RX_QUEUES, VMXNET3_REG_ALIGN)) {
1120         return;
1121     }
1122 
1123     VMW_WRPRN("BAR0 unknown write [%" PRIx64 "] = %" PRIx64 ", size %d",
1124               (uint64_t) addr, val, size);
1125 }
1126 
1127 static uint64_t
1128 vmxnet3_io_bar0_read(void *opaque, hwaddr addr, unsigned size)
1129 {
1130     VMXNET3State *s = opaque;
1131 
1132     if (VMW_IS_MULTIREG_ADDR(addr, VMXNET3_REG_IMR,
1133                         VMXNET3_MAX_INTRS, VMXNET3_REG_ALIGN)) {
1134         int l = VMW_MULTIREG_IDX_BY_ADDR(addr, VMXNET3_REG_IMR,
1135                                          VMXNET3_REG_ALIGN);
1136         return s->interrupt_states[l].is_masked;
1137     }
1138 
1139     VMW_CBPRN("BAR0 unknown read [%" PRIx64 "], size %d", addr, size);
1140     return 0;
1141 }
1142 
1143 static void vmxnet3_reset_interrupt_states(VMXNET3State *s)
1144 {
1145     int i;
1146     for (i = 0; i < ARRAY_SIZE(s->interrupt_states); i++) {
1147         s->interrupt_states[i].is_asserted = false;
1148         s->interrupt_states[i].is_pending = false;
1149         s->interrupt_states[i].is_masked = true;
1150     }
1151 }
1152 
1153 static void vmxnet3_reset_mac(VMXNET3State *s)
1154 {
1155     memcpy(&s->conf.macaddr.a, &s->perm_mac.a, sizeof(s->perm_mac.a));
1156     VMW_CFPRN("MAC address set to: " MAC_FMT, MAC_ARG(s->conf.macaddr.a));
1157 }
1158 
1159 static void vmxnet3_deactivate_device(VMXNET3State *s)
1160 {
1161     if (s->device_active) {
1162         VMW_CBPRN("Deactivating vmxnet3...");
1163         net_tx_pkt_uninit(s->tx_pkt);
1164         net_rx_pkt_uninit(s->rx_pkt);
1165         s->device_active = false;
1166     }
1167 }
1168 
1169 static void vmxnet3_reset(VMXNET3State *s)
1170 {
1171     VMW_CBPRN("Resetting vmxnet3...");
1172 
1173     vmxnet3_deactivate_device(s);
1174     vmxnet3_reset_interrupt_states(s);
1175     s->drv_shmem = 0;
1176     s->tx_sop = true;
1177     s->skip_current_tx_pkt = false;
1178 }
1179 
1180 static void vmxnet3_update_rx_mode(VMXNET3State *s)
1181 {
1182     PCIDevice *d = PCI_DEVICE(s);
1183 
1184     s->rx_mode = VMXNET3_READ_DRV_SHARED32(d, s->drv_shmem,
1185                                            devRead.rxFilterConf.rxMode);
1186     VMW_CFPRN("RX mode: 0x%08X", s->rx_mode);
1187 }
1188 
1189 static void vmxnet3_update_vlan_filters(VMXNET3State *s)
1190 {
1191     int i;
1192     PCIDevice *d = PCI_DEVICE(s);
1193 
1194     /* Copy configuration from shared memory */
1195     VMXNET3_READ_DRV_SHARED(d, s->drv_shmem,
1196                             devRead.rxFilterConf.vfTable,
1197                             s->vlan_table,
1198                             sizeof(s->vlan_table));
1199 
1200     /* Invert byte order when needed */
1201     for (i = 0; i < ARRAY_SIZE(s->vlan_table); i++) {
1202         s->vlan_table[i] = le32_to_cpu(s->vlan_table[i]);
1203     }
1204 
1205     /* Dump configuration for debugging purposes */
1206     VMW_CFPRN("Configured VLANs:");
1207     for (i = 0; i < sizeof(s->vlan_table) * 8; i++) {
1208         if (VMXNET3_VFTABLE_ENTRY_IS_SET(s->vlan_table, i)) {
1209             VMW_CFPRN("\tVLAN %d is present", i);
1210         }
1211     }
1212 }
1213 
1214 static void vmxnet3_update_mcast_filters(VMXNET3State *s)
1215 {
1216     PCIDevice *d = PCI_DEVICE(s);
1217 
1218     uint16_t list_bytes =
1219         VMXNET3_READ_DRV_SHARED16(d, s->drv_shmem,
1220                                   devRead.rxFilterConf.mfTableLen);
1221 
1222     s->mcast_list_len = list_bytes / sizeof(s->mcast_list[0]);
1223 
1224     s->mcast_list = g_realloc(s->mcast_list, list_bytes);
1225     if (!s->mcast_list) {
1226         if (s->mcast_list_len == 0) {
1227             VMW_CFPRN("Current multicast list is empty");
1228         } else {
1229             VMW_ERPRN("Failed to allocate multicast list of %d elements",
1230                       s->mcast_list_len);
1231         }
1232         s->mcast_list_len = 0;
1233     } else {
1234         int i;
1235         hwaddr mcast_list_pa =
1236             VMXNET3_READ_DRV_SHARED64(d, s->drv_shmem,
1237                                       devRead.rxFilterConf.mfTablePA);
1238 
1239         pci_dma_read(d, mcast_list_pa, s->mcast_list, list_bytes);
1240 
1241         VMW_CFPRN("Current multicast list len is %d:", s->mcast_list_len);
1242         for (i = 0; i < s->mcast_list_len; i++) {
1243             VMW_CFPRN("\t" MAC_FMT, MAC_ARG(s->mcast_list[i].a));
1244         }
1245     }
1246 }
1247 
1248 static void vmxnet3_setup_rx_filtering(VMXNET3State *s)
1249 {
1250     vmxnet3_update_rx_mode(s);
1251     vmxnet3_update_vlan_filters(s);
1252     vmxnet3_update_mcast_filters(s);
1253 }
1254 
1255 static uint32_t vmxnet3_get_interrupt_config(VMXNET3State *s)
1256 {
1257     uint32_t interrupt_mode = VMXNET3_IT_AUTO | (VMXNET3_IMM_AUTO << 2);
1258     VMW_CFPRN("Interrupt config is 0x%X", interrupt_mode);
1259     return interrupt_mode;
1260 }
1261 
1262 static void vmxnet3_fill_stats(VMXNET3State *s)
1263 {
1264     int i;
1265     PCIDevice *d = PCI_DEVICE(s);
1266 
1267     if (!s->device_active)
1268         return;
1269 
1270     for (i = 0; i < s->txq_num; i++) {
1271         pci_dma_write(d,
1272                       s->txq_descr[i].tx_stats_pa,
1273                       &s->txq_descr[i].txq_stats,
1274                       sizeof(s->txq_descr[i].txq_stats));
1275     }
1276 
1277     for (i = 0; i < s->rxq_num; i++) {
1278         pci_dma_write(d,
1279                       s->rxq_descr[i].rx_stats_pa,
1280                       &s->rxq_descr[i].rxq_stats,
1281                       sizeof(s->rxq_descr[i].rxq_stats));
1282     }
1283 }
1284 
1285 static void vmxnet3_adjust_by_guest_type(VMXNET3State *s)
1286 {
1287     struct Vmxnet3_GOSInfo gos;
1288     PCIDevice *d = PCI_DEVICE(s);
1289 
1290     VMXNET3_READ_DRV_SHARED(d, s->drv_shmem, devRead.misc.driverInfo.gos,
1291                             &gos, sizeof(gos));
1292     s->rx_packets_compound =
1293         (gos.gosType == VMXNET3_GOS_TYPE_WIN) ? false : true;
1294 
1295     VMW_CFPRN("Guest type specifics: RXCOMPOUND: %d", s->rx_packets_compound);
1296 }
1297 
1298 static void
1299 vmxnet3_dump_conf_descr(const char *name,
1300                         struct Vmxnet3_VariableLenConfDesc *pm_descr)
1301 {
1302     VMW_CFPRN("%s descriptor dump: Version %u, Length %u",
1303               name, pm_descr->confVer, pm_descr->confLen);
1304 
1305 };
1306 
1307 static void vmxnet3_update_pm_state(VMXNET3State *s)
1308 {
1309     struct Vmxnet3_VariableLenConfDesc pm_descr;
1310     PCIDevice *d = PCI_DEVICE(s);
1311 
1312     pm_descr.confLen =
1313         VMXNET3_READ_DRV_SHARED32(d, s->drv_shmem, devRead.pmConfDesc.confLen);
1314     pm_descr.confVer =
1315         VMXNET3_READ_DRV_SHARED32(d, s->drv_shmem, devRead.pmConfDesc.confVer);
1316     pm_descr.confPA =
1317         VMXNET3_READ_DRV_SHARED64(d, s->drv_shmem, devRead.pmConfDesc.confPA);
1318 
1319     vmxnet3_dump_conf_descr("PM State", &pm_descr);
1320 }
1321 
1322 static void vmxnet3_update_features(VMXNET3State *s)
1323 {
1324     uint32_t guest_features;
1325     int rxcso_supported;
1326     PCIDevice *d = PCI_DEVICE(s);
1327 
1328     guest_features = VMXNET3_READ_DRV_SHARED32(d, s->drv_shmem,
1329                                                devRead.misc.uptFeatures);
1330 
1331     rxcso_supported = VMXNET_FLAG_IS_SET(guest_features, UPT1_F_RXCSUM);
1332     s->rx_vlan_stripping = VMXNET_FLAG_IS_SET(guest_features, UPT1_F_RXVLAN);
1333     s->lro_supported = VMXNET_FLAG_IS_SET(guest_features, UPT1_F_LRO);
1334 
1335     VMW_CFPRN("Features configuration: LRO: %d, RXCSUM: %d, VLANSTRIP: %d",
1336               s->lro_supported, rxcso_supported,
1337               s->rx_vlan_stripping);
1338     if (s->peer_has_vhdr) {
1339         qemu_set_offload(qemu_get_queue(s->nic)->peer,
1340                          rxcso_supported,
1341                          s->lro_supported,
1342                          s->lro_supported,
1343                          0,
1344                          0,
1345                          0,
1346                          0);
1347     }
1348 }
1349 
1350 static bool vmxnet3_verify_intx(VMXNET3State *s, int intx)
1351 {
1352     return s->msix_used || msi_enabled(PCI_DEVICE(s))
1353         || intx == pci_get_byte(s->parent_obj.config + PCI_INTERRUPT_PIN) - 1;
1354 }
1355 
1356 static void vmxnet3_validate_interrupt_idx(bool is_msix, int idx)
1357 {
1358     int max_ints = is_msix ? VMXNET3_MAX_INTRS : VMXNET3_MAX_NMSIX_INTRS;
1359     if (idx >= max_ints) {
1360         hw_error("Bad interrupt index: %d\n", idx);
1361     }
1362 }
1363 
1364 static void vmxnet3_validate_interrupts(VMXNET3State *s)
1365 {
1366     int i;
1367 
1368     VMW_CFPRN("Verifying event interrupt index (%d)", s->event_int_idx);
1369     vmxnet3_validate_interrupt_idx(s->msix_used, s->event_int_idx);
1370 
1371     for (i = 0; i < s->txq_num; i++) {
1372         int idx = s->txq_descr[i].intr_idx;
1373         VMW_CFPRN("Verifying TX queue %d interrupt index (%d)", i, idx);
1374         vmxnet3_validate_interrupt_idx(s->msix_used, idx);
1375     }
1376 
1377     for (i = 0; i < s->rxq_num; i++) {
1378         int idx = s->rxq_descr[i].intr_idx;
1379         VMW_CFPRN("Verifying RX queue %d interrupt index (%d)", i, idx);
1380         vmxnet3_validate_interrupt_idx(s->msix_used, idx);
1381     }
1382 }
1383 
1384 static bool vmxnet3_validate_queues(VMXNET3State *s)
1385 {
1386     /*
1387     * txq_num and rxq_num are total number of queues
1388     * configured by guest. These numbers must not
1389     * exceed corresponding maximal values.
1390     */
1391 
1392     if (s->txq_num > VMXNET3_DEVICE_MAX_TX_QUEUES) {
1393         qemu_log_mask(LOG_GUEST_ERROR, "vmxnet3: Bad TX queues number: %d\n",
1394                       s->txq_num);
1395         return false;
1396     }
1397 
1398     if (s->rxq_num > VMXNET3_DEVICE_MAX_RX_QUEUES) {
1399         qemu_log_mask(LOG_GUEST_ERROR, "vmxnet3: Bad RX queues number: %d\n",
1400                       s->rxq_num);
1401         return false;
1402     }
1403 
1404     return true;
1405 }
1406 
1407 static void vmxnet3_activate_device(VMXNET3State *s)
1408 {
1409     int i;
1410     static const uint32_t VMXNET3_DEF_TX_THRESHOLD = 1;
1411     PCIDevice *d = PCI_DEVICE(s);
1412     hwaddr qdescr_table_pa;
1413     uint64_t pa;
1414     uint32_t size;
1415 
1416     /* Verify configuration consistency */
1417     if (!vmxnet3_verify_driver_magic(d, s->drv_shmem)) {
1418         VMW_ERPRN("Device configuration received from driver is invalid");
1419         return;
1420     }
1421 
1422     /* Verify if device is active */
1423     if (s->device_active) {
1424         VMW_CFPRN("Vmxnet3 device is active");
1425         return;
1426     }
1427 
1428     s->txq_num =
1429         VMXNET3_READ_DRV_SHARED8(d, s->drv_shmem, devRead.misc.numTxQueues);
1430     s->rxq_num =
1431         VMXNET3_READ_DRV_SHARED8(d, s->drv_shmem, devRead.misc.numRxQueues);
1432 
1433     VMW_CFPRN("Number of TX/RX queues %u/%u", s->txq_num, s->rxq_num);
1434     if (!vmxnet3_validate_queues(s)) {
1435         return;
1436     }
1437 
1438     vmxnet3_adjust_by_guest_type(s);
1439     vmxnet3_update_features(s);
1440     vmxnet3_update_pm_state(s);
1441     vmxnet3_setup_rx_filtering(s);
1442     /* Cache fields from shared memory */
1443     s->mtu = VMXNET3_READ_DRV_SHARED32(d, s->drv_shmem, devRead.misc.mtu);
1444     if (s->mtu < VMXNET3_MIN_MTU || s->mtu > VMXNET3_MAX_MTU) {
1445         qemu_log_mask(LOG_GUEST_ERROR, "vmxnet3: Bad MTU size: %u\n", s->mtu);
1446         return;
1447     }
1448     VMW_CFPRN("MTU is %u", s->mtu);
1449 
1450     s->max_rx_frags =
1451         VMXNET3_READ_DRV_SHARED16(d, s->drv_shmem, devRead.misc.maxNumRxSG);
1452 
1453     if (s->max_rx_frags == 0) {
1454         s->max_rx_frags = 1;
1455     }
1456 
1457     VMW_CFPRN("Max RX fragments is %u", s->max_rx_frags);
1458 
1459     s->event_int_idx =
1460         VMXNET3_READ_DRV_SHARED8(d, s->drv_shmem, devRead.intrConf.eventIntrIdx);
1461     assert(vmxnet3_verify_intx(s, s->event_int_idx));
1462     VMW_CFPRN("Events interrupt line is %u", s->event_int_idx);
1463 
1464     s->auto_int_masking =
1465         VMXNET3_READ_DRV_SHARED8(d, s->drv_shmem, devRead.intrConf.autoMask);
1466     VMW_CFPRN("Automatic interrupt masking is %d", (int)s->auto_int_masking);
1467 
1468     qdescr_table_pa =
1469         VMXNET3_READ_DRV_SHARED64(d, s->drv_shmem, devRead.misc.queueDescPA);
1470     VMW_CFPRN("TX queues descriptors table is at 0x%" PRIx64, qdescr_table_pa);
1471 
1472     /*
1473      * Worst-case scenario is a packet that holds all TX rings space so
1474      * we calculate total size of all TX rings for max TX fragments number
1475      */
1476     s->max_tx_frags = 0;
1477 
1478     /* TX queues */
1479     for (i = 0; i < s->txq_num; i++) {
1480         hwaddr qdescr_pa =
1481             qdescr_table_pa + i * sizeof(struct Vmxnet3_TxQueueDesc);
1482 
1483         /* Read interrupt number for this TX queue */
1484         s->txq_descr[i].intr_idx =
1485             VMXNET3_READ_TX_QUEUE_DESCR8(d, qdescr_pa, conf.intrIdx);
1486         assert(vmxnet3_verify_intx(s, s->txq_descr[i].intr_idx));
1487 
1488         VMW_CFPRN("TX Queue %d interrupt: %d", i, s->txq_descr[i].intr_idx);
1489 
1490         /* Read rings memory locations for TX queues */
1491         pa = VMXNET3_READ_TX_QUEUE_DESCR64(d, qdescr_pa, conf.txRingBasePA);
1492         size = VMXNET3_READ_TX_QUEUE_DESCR32(d, qdescr_pa, conf.txRingSize);
1493         if (size > VMXNET3_TX_RING_MAX_SIZE) {
1494             size = VMXNET3_TX_RING_MAX_SIZE;
1495         }
1496 
1497         vmxnet3_ring_init(d, &s->txq_descr[i].tx_ring, pa, size,
1498                           sizeof(struct Vmxnet3_TxDesc), false);
1499         VMXNET3_RING_DUMP(VMW_CFPRN, "TX", i, &s->txq_descr[i].tx_ring);
1500 
1501         s->max_tx_frags += size;
1502 
1503         /* TXC ring */
1504         pa = VMXNET3_READ_TX_QUEUE_DESCR64(d, qdescr_pa, conf.compRingBasePA);
1505         size = VMXNET3_READ_TX_QUEUE_DESCR32(d, qdescr_pa, conf.compRingSize);
1506         if (size > VMXNET3_TC_RING_MAX_SIZE) {
1507             size = VMXNET3_TC_RING_MAX_SIZE;
1508         }
1509         vmxnet3_ring_init(d, &s->txq_descr[i].comp_ring, pa, size,
1510                           sizeof(struct Vmxnet3_TxCompDesc), true);
1511         VMXNET3_RING_DUMP(VMW_CFPRN, "TXC", i, &s->txq_descr[i].comp_ring);
1512 
1513         s->txq_descr[i].tx_stats_pa =
1514             qdescr_pa + offsetof(struct Vmxnet3_TxQueueDesc, stats);
1515 
1516         memset(&s->txq_descr[i].txq_stats, 0,
1517                sizeof(s->txq_descr[i].txq_stats));
1518 
1519         /* Fill device-managed parameters for queues */
1520         VMXNET3_WRITE_TX_QUEUE_DESCR32(d, qdescr_pa,
1521                                        ctrl.txThreshold,
1522                                        VMXNET3_DEF_TX_THRESHOLD);
1523     }
1524 
1525     /* Preallocate TX packet wrapper */
1526     VMW_CFPRN("Max TX fragments is %u", s->max_tx_frags);
1527     net_tx_pkt_init(&s->tx_pkt, s->max_tx_frags);
1528     net_rx_pkt_init(&s->rx_pkt);
1529 
1530     /* Read rings memory locations for RX queues */
1531     for (i = 0; i < s->rxq_num; i++) {
1532         int j;
1533         hwaddr qd_pa =
1534             qdescr_table_pa + s->txq_num * sizeof(struct Vmxnet3_TxQueueDesc) +
1535             i * sizeof(struct Vmxnet3_RxQueueDesc);
1536 
1537         /* Read interrupt number for this RX queue */
1538         s->rxq_descr[i].intr_idx =
1539             VMXNET3_READ_TX_QUEUE_DESCR8(d, qd_pa, conf.intrIdx);
1540         assert(vmxnet3_verify_intx(s, s->rxq_descr[i].intr_idx));
1541 
1542         VMW_CFPRN("RX Queue %d interrupt: %d", i, s->rxq_descr[i].intr_idx);
1543 
1544         /* Read rings memory locations */
1545         for (j = 0; j < VMXNET3_RX_RINGS_PER_QUEUE; j++) {
1546             /* RX rings */
1547             pa = VMXNET3_READ_RX_QUEUE_DESCR64(d, qd_pa, conf.rxRingBasePA[j]);
1548             size = VMXNET3_READ_RX_QUEUE_DESCR32(d, qd_pa, conf.rxRingSize[j]);
1549             if (size > VMXNET3_RX_RING_MAX_SIZE) {
1550                 size = VMXNET3_RX_RING_MAX_SIZE;
1551             }
1552             vmxnet3_ring_init(d, &s->rxq_descr[i].rx_ring[j], pa, size,
1553                               sizeof(struct Vmxnet3_RxDesc), false);
1554             VMW_CFPRN("RX queue %d:%d: Base: %" PRIx64 ", Size: %d",
1555                       i, j, pa, size);
1556         }
1557 
1558         /* RXC ring */
1559         pa = VMXNET3_READ_RX_QUEUE_DESCR64(d, qd_pa, conf.compRingBasePA);
1560         size = VMXNET3_READ_RX_QUEUE_DESCR32(d, qd_pa, conf.compRingSize);
1561         if (size > VMXNET3_RC_RING_MAX_SIZE) {
1562             size = VMXNET3_RC_RING_MAX_SIZE;
1563         }
1564         vmxnet3_ring_init(d, &s->rxq_descr[i].comp_ring, pa, size,
1565                           sizeof(struct Vmxnet3_RxCompDesc), true);
1566         VMW_CFPRN("RXC queue %d: Base: %" PRIx64 ", Size: %d", i, pa, size);
1567 
1568         s->rxq_descr[i].rx_stats_pa =
1569             qd_pa + offsetof(struct Vmxnet3_RxQueueDesc, stats);
1570         memset(&s->rxq_descr[i].rxq_stats, 0,
1571                sizeof(s->rxq_descr[i].rxq_stats));
1572     }
1573 
1574     vmxnet3_validate_interrupts(s);
1575 
1576     /* Make sure everything is in place before device activation */
1577     smp_wmb();
1578 
1579     vmxnet3_reset_mac(s);
1580 
1581     s->device_active = true;
1582 }
1583 
1584 static void vmxnet3_handle_command(VMXNET3State *s, uint64_t cmd)
1585 {
1586     s->last_command = cmd;
1587 
1588     switch (cmd) {
1589     case VMXNET3_CMD_GET_PERM_MAC_HI:
1590         VMW_CBPRN("Set: Get upper part of permanent MAC");
1591         break;
1592 
1593     case VMXNET3_CMD_GET_PERM_MAC_LO:
1594         VMW_CBPRN("Set: Get lower part of permanent MAC");
1595         break;
1596 
1597     case VMXNET3_CMD_GET_STATS:
1598         VMW_CBPRN("Set: Get device statistics");
1599         vmxnet3_fill_stats(s);
1600         break;
1601 
1602     case VMXNET3_CMD_ACTIVATE_DEV:
1603         VMW_CBPRN("Set: Activating vmxnet3 device");
1604         vmxnet3_activate_device(s);
1605         break;
1606 
1607     case VMXNET3_CMD_UPDATE_RX_MODE:
1608         VMW_CBPRN("Set: Update rx mode");
1609         vmxnet3_update_rx_mode(s);
1610         break;
1611 
1612     case VMXNET3_CMD_UPDATE_VLAN_FILTERS:
1613         VMW_CBPRN("Set: Update VLAN filters");
1614         vmxnet3_update_vlan_filters(s);
1615         break;
1616 
1617     case VMXNET3_CMD_UPDATE_MAC_FILTERS:
1618         VMW_CBPRN("Set: Update MAC filters");
1619         vmxnet3_update_mcast_filters(s);
1620         break;
1621 
1622     case VMXNET3_CMD_UPDATE_FEATURE:
1623         VMW_CBPRN("Set: Update features");
1624         vmxnet3_update_features(s);
1625         break;
1626 
1627     case VMXNET3_CMD_UPDATE_PMCFG:
1628         VMW_CBPRN("Set: Update power management config");
1629         vmxnet3_update_pm_state(s);
1630         break;
1631 
1632     case VMXNET3_CMD_GET_LINK:
1633         VMW_CBPRN("Set: Get link");
1634         break;
1635 
1636     case VMXNET3_CMD_RESET_DEV:
1637         VMW_CBPRN("Set: Reset device");
1638         vmxnet3_reset(s);
1639         break;
1640 
1641     case VMXNET3_CMD_QUIESCE_DEV:
1642         VMW_CBPRN("Set: VMXNET3_CMD_QUIESCE_DEV - deactivate the device");
1643         vmxnet3_deactivate_device(s);
1644         break;
1645 
1646     case VMXNET3_CMD_GET_CONF_INTR:
1647         VMW_CBPRN("Set: VMXNET3_CMD_GET_CONF_INTR - interrupt configuration");
1648         break;
1649 
1650     case VMXNET3_CMD_GET_ADAPTIVE_RING_INFO:
1651         VMW_CBPRN("Set: VMXNET3_CMD_GET_ADAPTIVE_RING_INFO - "
1652                   "adaptive ring info flags");
1653         break;
1654 
1655     case VMXNET3_CMD_GET_DID_LO:
1656         VMW_CBPRN("Set: Get lower part of device ID");
1657         break;
1658 
1659     case VMXNET3_CMD_GET_DID_HI:
1660         VMW_CBPRN("Set: Get upper part of device ID");
1661         break;
1662 
1663     case VMXNET3_CMD_GET_DEV_EXTRA_INFO:
1664         VMW_CBPRN("Set: Get device extra info");
1665         break;
1666 
1667     default:
1668         VMW_CBPRN("Received unknown command: %" PRIx64, cmd);
1669         break;
1670     }
1671 }
1672 
1673 static uint64_t vmxnet3_get_command_status(VMXNET3State *s)
1674 {
1675     uint64_t ret;
1676 
1677     switch (s->last_command) {
1678     case VMXNET3_CMD_ACTIVATE_DEV:
1679         ret = (s->device_active) ? 0 : 1;
1680         VMW_CFPRN("Device active: %" PRIx64, ret);
1681         break;
1682 
1683     case VMXNET3_CMD_RESET_DEV:
1684     case VMXNET3_CMD_QUIESCE_DEV:
1685     case VMXNET3_CMD_GET_QUEUE_STATUS:
1686     case VMXNET3_CMD_GET_DEV_EXTRA_INFO:
1687         ret = 0;
1688         break;
1689 
1690     case VMXNET3_CMD_GET_LINK:
1691         ret = s->link_status_and_speed;
1692         VMW_CFPRN("Link and speed: %" PRIx64, ret);
1693         break;
1694 
1695     case VMXNET3_CMD_GET_PERM_MAC_LO:
1696         ret = vmxnet3_get_mac_low(&s->perm_mac);
1697         break;
1698 
1699     case VMXNET3_CMD_GET_PERM_MAC_HI:
1700         ret = vmxnet3_get_mac_high(&s->perm_mac);
1701         break;
1702 
1703     case VMXNET3_CMD_GET_CONF_INTR:
1704         ret = vmxnet3_get_interrupt_config(s);
1705         break;
1706 
1707     case VMXNET3_CMD_GET_ADAPTIVE_RING_INFO:
1708         ret = VMXNET3_DISABLE_ADAPTIVE_RING;
1709         break;
1710 
1711     case VMXNET3_CMD_GET_DID_LO:
1712         ret = PCI_DEVICE_ID_VMWARE_VMXNET3;
1713         break;
1714 
1715     case VMXNET3_CMD_GET_DID_HI:
1716         ret = VMXNET3_DEVICE_REVISION;
1717         break;
1718 
1719     default:
1720         VMW_WRPRN("Received request for unknown command: %x", s->last_command);
1721         ret = 0;
1722         break;
1723     }
1724 
1725     return ret;
1726 }
1727 
1728 static void vmxnet3_set_events(VMXNET3State *s, uint32_t val)
1729 {
1730     uint32_t events;
1731     PCIDevice *d = PCI_DEVICE(s);
1732 
1733     VMW_CBPRN("Setting events: 0x%x", val);
1734     events = VMXNET3_READ_DRV_SHARED32(d, s->drv_shmem, ecr) | val;
1735     VMXNET3_WRITE_DRV_SHARED32(d, s->drv_shmem, ecr, events);
1736 }
1737 
1738 static void vmxnet3_ack_events(VMXNET3State *s, uint32_t val)
1739 {
1740     PCIDevice *d = PCI_DEVICE(s);
1741     uint32_t events;
1742 
1743     VMW_CBPRN("Clearing events: 0x%x", val);
1744     events = VMXNET3_READ_DRV_SHARED32(d, s->drv_shmem, ecr) & ~val;
1745     VMXNET3_WRITE_DRV_SHARED32(d, s->drv_shmem, ecr, events);
1746 }
1747 
1748 static void
1749 vmxnet3_io_bar1_write(void *opaque,
1750                       hwaddr addr,
1751                       uint64_t val,
1752                       unsigned size)
1753 {
1754     VMXNET3State *s = opaque;
1755 
1756     switch (addr) {
1757     /* Vmxnet3 Revision Report Selection */
1758     case VMXNET3_REG_VRRS:
1759         VMW_CBPRN("Write BAR1 [VMXNET3_REG_VRRS] = %" PRIx64 ", size %d",
1760                   val, size);
1761         break;
1762 
1763     /* UPT Version Report Selection */
1764     case VMXNET3_REG_UVRS:
1765         VMW_CBPRN("Write BAR1 [VMXNET3_REG_UVRS] = %" PRIx64 ", size %d",
1766                   val, size);
1767         break;
1768 
1769     /* Driver Shared Address Low */
1770     case VMXNET3_REG_DSAL:
1771         VMW_CBPRN("Write BAR1 [VMXNET3_REG_DSAL] = %" PRIx64 ", size %d",
1772                   val, size);
1773         /*
1774          * Guest driver will first write the low part of the shared
1775          * memory address. We save it to temp variable and set the
1776          * shared address only after we get the high part
1777          */
1778         if (val == 0) {
1779             vmxnet3_deactivate_device(s);
1780         }
1781         s->temp_shared_guest_driver_memory = val;
1782         s->drv_shmem = 0;
1783         break;
1784 
1785     /* Driver Shared Address High */
1786     case VMXNET3_REG_DSAH:
1787         VMW_CBPRN("Write BAR1 [VMXNET3_REG_DSAH] = %" PRIx64 ", size %d",
1788                   val, size);
1789         /*
1790          * Set the shared memory between guest driver and device.
1791          * We already should have low address part.
1792          */
1793         s->drv_shmem = s->temp_shared_guest_driver_memory | (val << 32);
1794         break;
1795 
1796     /* Command */
1797     case VMXNET3_REG_CMD:
1798         VMW_CBPRN("Write BAR1 [VMXNET3_REG_CMD] = %" PRIx64 ", size %d",
1799                   val, size);
1800         vmxnet3_handle_command(s, val);
1801         break;
1802 
1803     /* MAC Address Low */
1804     case VMXNET3_REG_MACL:
1805         VMW_CBPRN("Write BAR1 [VMXNET3_REG_MACL] = %" PRIx64 ", size %d",
1806                   val, size);
1807         s->temp_mac = val;
1808         break;
1809 
1810     /* MAC Address High */
1811     case VMXNET3_REG_MACH:
1812         VMW_CBPRN("Write BAR1 [VMXNET3_REG_MACH] = %" PRIx64 ", size %d",
1813                   val, size);
1814         vmxnet3_set_variable_mac(s, val, s->temp_mac);
1815         break;
1816 
1817     /* Interrupt Cause Register */
1818     case VMXNET3_REG_ICR:
1819         VMW_CBPRN("Write BAR1 [VMXNET3_REG_ICR] = %" PRIx64 ", size %d",
1820                   val, size);
1821         qemu_log_mask(LOG_GUEST_ERROR,
1822                       "%s: write to read-only register VMXNET3_REG_ICR\n",
1823                       TYPE_VMXNET3);
1824         break;
1825 
1826     /* Event Cause Register */
1827     case VMXNET3_REG_ECR:
1828         VMW_CBPRN("Write BAR1 [VMXNET3_REG_ECR] = %" PRIx64 ", size %d",
1829                   val, size);
1830         vmxnet3_ack_events(s, val);
1831         break;
1832 
1833     default:
1834         VMW_CBPRN("Unknown Write to BAR1 [%" PRIx64 "] = %" PRIx64 ", size %d",
1835                   addr, val, size);
1836         break;
1837     }
1838 }
1839 
1840 static uint64_t
1841 vmxnet3_io_bar1_read(void *opaque, hwaddr addr, unsigned size)
1842 {
1843         VMXNET3State *s = opaque;
1844         uint64_t ret = 0;
1845 
1846         switch (addr) {
1847         /* Vmxnet3 Revision Report Selection */
1848         case VMXNET3_REG_VRRS:
1849             VMW_CBPRN("Read BAR1 [VMXNET3_REG_VRRS], size %d", size);
1850             ret = VMXNET3_DEVICE_REVISION;
1851             break;
1852 
1853         /* UPT Version Report Selection */
1854         case VMXNET3_REG_UVRS:
1855             VMW_CBPRN("Read BAR1 [VMXNET3_REG_UVRS], size %d", size);
1856             ret = VMXNET3_UPT_REVISION;
1857             break;
1858 
1859         /* Command */
1860         case VMXNET3_REG_CMD:
1861             VMW_CBPRN("Read BAR1 [VMXNET3_REG_CMD], size %d", size);
1862             ret = vmxnet3_get_command_status(s);
1863             break;
1864 
1865         /* MAC Address Low */
1866         case VMXNET3_REG_MACL:
1867             VMW_CBPRN("Read BAR1 [VMXNET3_REG_MACL], size %d", size);
1868             ret = vmxnet3_get_mac_low(&s->conf.macaddr);
1869             break;
1870 
1871         /* MAC Address High */
1872         case VMXNET3_REG_MACH:
1873             VMW_CBPRN("Read BAR1 [VMXNET3_REG_MACH], size %d", size);
1874             ret = vmxnet3_get_mac_high(&s->conf.macaddr);
1875             break;
1876 
1877         /*
1878          * Interrupt Cause Register
1879          * Used for legacy interrupts only so interrupt index always 0
1880          */
1881         case VMXNET3_REG_ICR:
1882             VMW_CBPRN("Read BAR1 [VMXNET3_REG_ICR], size %d", size);
1883             if (vmxnet3_interrupt_asserted(s, 0)) {
1884                 vmxnet3_clear_interrupt(s, 0);
1885                 ret = true;
1886             } else {
1887                 ret = false;
1888             }
1889             break;
1890 
1891         default:
1892             VMW_CBPRN("Unknown read BAR1[%" PRIx64 "], %d bytes", addr, size);
1893             break;
1894         }
1895 
1896         return ret;
1897 }
1898 
1899 static int
1900 vmxnet3_can_receive(NetClientState *nc)
1901 {
1902     VMXNET3State *s = qemu_get_nic_opaque(nc);
1903     return s->device_active &&
1904            VMXNET_FLAG_IS_SET(s->link_status_and_speed, VMXNET3_LINK_STATUS_UP);
1905 }
1906 
1907 static inline bool
1908 vmxnet3_is_registered_vlan(VMXNET3State *s, const void *data)
1909 {
1910     uint16_t vlan_tag = eth_get_pkt_tci(data) & VLAN_VID_MASK;
1911     if (IS_SPECIAL_VLAN_ID(vlan_tag)) {
1912         return true;
1913     }
1914 
1915     return VMXNET3_VFTABLE_ENTRY_IS_SET(s->vlan_table, vlan_tag);
1916 }
1917 
1918 static bool
1919 vmxnet3_is_allowed_mcast_group(VMXNET3State *s, const uint8_t *group_mac)
1920 {
1921     int i;
1922     for (i = 0; i < s->mcast_list_len; i++) {
1923         if (!memcmp(group_mac, s->mcast_list[i].a, sizeof(s->mcast_list[i]))) {
1924             return true;
1925         }
1926     }
1927     return false;
1928 }
1929 
1930 static bool
1931 vmxnet3_rx_filter_may_indicate(VMXNET3State *s, const void *data,
1932     size_t size)
1933 {
1934     struct eth_header *ehdr = PKT_GET_ETH_HDR(data);
1935 
1936     if (VMXNET_FLAG_IS_SET(s->rx_mode, VMXNET3_RXM_PROMISC)) {
1937         return true;
1938     }
1939 
1940     if (!vmxnet3_is_registered_vlan(s, data)) {
1941         return false;
1942     }
1943 
1944     switch (net_rx_pkt_get_packet_type(s->rx_pkt)) {
1945     case ETH_PKT_UCAST:
1946         if (!VMXNET_FLAG_IS_SET(s->rx_mode, VMXNET3_RXM_UCAST)) {
1947             return false;
1948         }
1949         if (memcmp(s->conf.macaddr.a, ehdr->h_dest, ETH_ALEN)) {
1950             return false;
1951         }
1952         break;
1953 
1954     case ETH_PKT_BCAST:
1955         if (!VMXNET_FLAG_IS_SET(s->rx_mode, VMXNET3_RXM_BCAST)) {
1956             return false;
1957         }
1958         break;
1959 
1960     case ETH_PKT_MCAST:
1961         if (VMXNET_FLAG_IS_SET(s->rx_mode, VMXNET3_RXM_ALL_MULTI)) {
1962             return true;
1963         }
1964         if (!VMXNET_FLAG_IS_SET(s->rx_mode, VMXNET3_RXM_MCAST)) {
1965             return false;
1966         }
1967         if (!vmxnet3_is_allowed_mcast_group(s, ehdr->h_dest)) {
1968             return false;
1969         }
1970         break;
1971 
1972     default:
1973         g_assert_not_reached();
1974     }
1975 
1976     return true;
1977 }
1978 
1979 static ssize_t
1980 vmxnet3_receive(NetClientState *nc, const uint8_t *buf, size_t size)
1981 {
1982     VMXNET3State *s = qemu_get_nic_opaque(nc);
1983     size_t bytes_indicated;
1984 
1985     if (!vmxnet3_can_receive(nc)) {
1986         VMW_PKPRN("Cannot receive now");
1987         return -1;
1988     }
1989 
1990     if (s->peer_has_vhdr) {
1991         net_rx_pkt_set_vhdr(s->rx_pkt, (struct virtio_net_hdr *)buf);
1992         buf += sizeof(struct virtio_net_hdr);
1993         size -= sizeof(struct virtio_net_hdr);
1994     }
1995 
1996     net_rx_pkt_set_packet_type(s->rx_pkt,
1997         get_eth_packet_type(PKT_GET_ETH_HDR(buf)));
1998 
1999     if (vmxnet3_rx_filter_may_indicate(s, buf, size)) {
2000         struct iovec iov = {
2001             .iov_base = (void *)buf,
2002             .iov_len = size
2003         };
2004 
2005         net_rx_pkt_set_protocols(s->rx_pkt, &iov, 1, 0);
2006         vmxnet3_rx_need_csum_calculate(s->rx_pkt, buf, size);
2007         net_rx_pkt_attach_data(s->rx_pkt, buf, size, s->rx_vlan_stripping);
2008         bytes_indicated = vmxnet3_indicate_packet(s) ? size : -1;
2009         if (bytes_indicated < size) {
2010             VMW_PKPRN("RX: %zu of %zu bytes indicated", bytes_indicated, size);
2011         }
2012     } else {
2013         VMW_PKPRN("Packet dropped by RX filter");
2014         bytes_indicated = size;
2015     }
2016 
2017     assert(size > 0);
2018     assert(bytes_indicated != 0);
2019     return bytes_indicated;
2020 }
2021 
2022 static void vmxnet3_set_link_status(NetClientState *nc)
2023 {
2024     VMXNET3State *s = qemu_get_nic_opaque(nc);
2025 
2026     if (nc->link_down) {
2027         s->link_status_and_speed &= ~VMXNET3_LINK_STATUS_UP;
2028     } else {
2029         s->link_status_and_speed |= VMXNET3_LINK_STATUS_UP;
2030     }
2031 
2032     vmxnet3_set_events(s, VMXNET3_ECR_LINK);
2033     vmxnet3_trigger_interrupt(s, s->event_int_idx);
2034 }
2035 
2036 static NetClientInfo net_vmxnet3_info = {
2037         .type = NET_CLIENT_DRIVER_NIC,
2038         .size = sizeof(NICState),
2039         .receive = vmxnet3_receive,
2040         .link_status_changed = vmxnet3_set_link_status,
2041 };
2042 
2043 static bool vmxnet3_peer_has_vnet_hdr(VMXNET3State *s)
2044 {
2045     NetClientState *nc = qemu_get_queue(s->nic);
2046 
2047     if (qemu_has_vnet_hdr(nc->peer)) {
2048         return true;
2049     }
2050 
2051     return false;
2052 }
2053 
2054 static void vmxnet3_net_uninit(VMXNET3State *s)
2055 {
2056     g_free(s->mcast_list);
2057     vmxnet3_deactivate_device(s);
2058     qemu_del_nic(s->nic);
2059 }
2060 
2061 static void vmxnet3_net_init(VMXNET3State *s)
2062 {
2063     DeviceState *d = DEVICE(s);
2064 
2065     VMW_CBPRN("vmxnet3_net_init called...");
2066 
2067     qemu_macaddr_default_if_unset(&s->conf.macaddr);
2068 
2069     /* Windows guest will query the address that was set on init */
2070     memcpy(&s->perm_mac.a, &s->conf.macaddr.a, sizeof(s->perm_mac.a));
2071 
2072     s->mcast_list = NULL;
2073     s->mcast_list_len = 0;
2074 
2075     s->link_status_and_speed = VMXNET3_LINK_SPEED | VMXNET3_LINK_STATUS_UP;
2076 
2077     VMW_CFPRN("Permanent MAC: " MAC_FMT, MAC_ARG(s->perm_mac.a));
2078 
2079     s->nic = qemu_new_nic(&net_vmxnet3_info, &s->conf,
2080                           object_get_typename(OBJECT(s)),
2081                           d->id, &d->mem_reentrancy_guard, s);
2082 
2083     s->peer_has_vhdr = vmxnet3_peer_has_vnet_hdr(s);
2084     s->tx_sop = true;
2085     s->skip_current_tx_pkt = false;
2086     s->tx_pkt = NULL;
2087     s->rx_pkt = NULL;
2088     s->rx_vlan_stripping = false;
2089     s->lro_supported = false;
2090 
2091     if (s->peer_has_vhdr) {
2092         qemu_set_vnet_hdr_len(qemu_get_queue(s->nic)->peer,
2093             sizeof(struct virtio_net_hdr));
2094     }
2095 
2096     qemu_format_nic_info_str(qemu_get_queue(s->nic), s->conf.macaddr.a);
2097 }
2098 
2099 static void
2100 vmxnet3_unuse_msix_vectors(VMXNET3State *s, int num_vectors)
2101 {
2102     PCIDevice *d = PCI_DEVICE(s);
2103     int i;
2104     for (i = 0; i < num_vectors; i++) {
2105         msix_vector_unuse(d, i);
2106     }
2107 }
2108 
2109 static void
2110 vmxnet3_use_msix_vectors(VMXNET3State *s, int num_vectors)
2111 {
2112     PCIDevice *d = PCI_DEVICE(s);
2113     int i;
2114     for (i = 0; i < num_vectors; i++) {
2115         msix_vector_use(d, i);
2116     }
2117 }
2118 
2119 static bool
2120 vmxnet3_init_msix(VMXNET3State *s)
2121 {
2122     PCIDevice *d = PCI_DEVICE(s);
2123     int res = msix_init(d, VMXNET3_MAX_INTRS,
2124                         &s->msix_bar,
2125                         VMXNET3_MSIX_BAR_IDX, VMXNET3_OFF_MSIX_TABLE,
2126                         &s->msix_bar,
2127                         VMXNET3_MSIX_BAR_IDX, VMXNET3_OFF_MSIX_PBA(s),
2128                         VMXNET3_MSIX_OFFSET(s), NULL);
2129 
2130     if (0 > res) {
2131         VMW_WRPRN("Failed to initialize MSI-X, error %d", res);
2132         s->msix_used = false;
2133     } else {
2134         vmxnet3_use_msix_vectors(s, VMXNET3_MAX_INTRS);
2135         s->msix_used = true;
2136     }
2137     return s->msix_used;
2138 }
2139 
2140 static void
2141 vmxnet3_cleanup_msix(VMXNET3State *s)
2142 {
2143     PCIDevice *d = PCI_DEVICE(s);
2144 
2145     if (s->msix_used) {
2146         vmxnet3_unuse_msix_vectors(s, VMXNET3_MAX_INTRS);
2147         msix_uninit(d, &s->msix_bar, &s->msix_bar);
2148     }
2149 }
2150 
2151 static void
2152 vmxnet3_cleanup_msi(VMXNET3State *s)
2153 {
2154     PCIDevice *d = PCI_DEVICE(s);
2155 
2156     msi_uninit(d);
2157 }
2158 
2159 static const MemoryRegionOps b0_ops = {
2160     .read = vmxnet3_io_bar0_read,
2161     .write = vmxnet3_io_bar0_write,
2162     .endianness = DEVICE_LITTLE_ENDIAN,
2163     .impl = {
2164             .min_access_size = 4,
2165             .max_access_size = 4,
2166     },
2167 };
2168 
2169 static const MemoryRegionOps b1_ops = {
2170     .read = vmxnet3_io_bar1_read,
2171     .write = vmxnet3_io_bar1_write,
2172     .endianness = DEVICE_LITTLE_ENDIAN,
2173     .impl = {
2174             .min_access_size = 4,
2175             .max_access_size = 4,
2176     },
2177 };
2178 
2179 static uint64_t vmxnet3_device_serial_num(VMXNET3State *s)
2180 {
2181     uint64_t dsn_payload;
2182     uint8_t *dsnp = (uint8_t *)&dsn_payload;
2183 
2184     dsnp[0] = 0xfe;
2185     dsnp[1] = s->conf.macaddr.a[3];
2186     dsnp[2] = s->conf.macaddr.a[4];
2187     dsnp[3] = s->conf.macaddr.a[5];
2188     dsnp[4] = s->conf.macaddr.a[0];
2189     dsnp[5] = s->conf.macaddr.a[1];
2190     dsnp[6] = s->conf.macaddr.a[2];
2191     dsnp[7] = 0xff;
2192     return dsn_payload;
2193 }
2194 
2195 
2196 #define VMXNET3_USE_64BIT         (true)
2197 #define VMXNET3_PER_VECTOR_MASK   (false)
2198 
2199 static void vmxnet3_pci_realize(PCIDevice *pci_dev, Error **errp)
2200 {
2201     VMXNET3State *s = VMXNET3(pci_dev);
2202     int ret;
2203 
2204     VMW_CBPRN("Starting init...");
2205 
2206     memory_region_init_io(&s->bar0, OBJECT(s), &b0_ops, s,
2207                           "vmxnet3-b0", VMXNET3_PT_REG_SIZE);
2208     pci_register_bar(pci_dev, VMXNET3_BAR0_IDX,
2209                      PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar0);
2210 
2211     memory_region_init_io(&s->bar1, OBJECT(s), &b1_ops, s,
2212                           "vmxnet3-b1", VMXNET3_VD_REG_SIZE);
2213     pci_register_bar(pci_dev, VMXNET3_BAR1_IDX,
2214                      PCI_BASE_ADDRESS_SPACE_MEMORY, &s->bar1);
2215 
2216     memory_region_init(&s->msix_bar, OBJECT(s), "vmxnet3-msix-bar",
2217                        VMXNET3_MSIX_BAR_SIZE);
2218     pci_register_bar(pci_dev, VMXNET3_MSIX_BAR_IDX,
2219                      PCI_BASE_ADDRESS_SPACE_MEMORY, &s->msix_bar);
2220 
2221     vmxnet3_reset_interrupt_states(s);
2222 
2223     /* Interrupt pin A */
2224     pci_dev->config[PCI_INTERRUPT_PIN] = 0x01;
2225 
2226     ret = msi_init(pci_dev, VMXNET3_MSI_OFFSET(s), VMXNET3_MAX_NMSIX_INTRS,
2227                    VMXNET3_USE_64BIT, VMXNET3_PER_VECTOR_MASK, NULL);
2228     /* Any error other than -ENOTSUP(board's MSI support is broken)
2229      * is a programming error. Fall back to INTx silently on -ENOTSUP */
2230     assert(!ret || ret == -ENOTSUP);
2231 
2232     if (!vmxnet3_init_msix(s)) {
2233         VMW_WRPRN("Failed to initialize MSI-X, configuration is inconsistent.");
2234     }
2235 
2236     vmxnet3_net_init(s);
2237 
2238     if (pci_is_express(pci_dev)) {
2239         if (pci_bus_is_express(pci_get_bus(pci_dev))) {
2240             pcie_endpoint_cap_init(pci_dev, VMXNET3_EXP_EP_OFFSET);
2241         }
2242 
2243         pcie_dev_ser_num_init(pci_dev, VMXNET3_DSN_OFFSET,
2244                               vmxnet3_device_serial_num(s));
2245     }
2246 }
2247 
2248 static void vmxnet3_instance_init(Object *obj)
2249 {
2250     VMXNET3State *s = VMXNET3(obj);
2251     device_add_bootindex_property(obj, &s->conf.bootindex,
2252                                   "bootindex", "/ethernet-phy@0",
2253                                   DEVICE(obj));
2254 }
2255 
2256 static void vmxnet3_pci_uninit(PCIDevice *pci_dev)
2257 {
2258     VMXNET3State *s = VMXNET3(pci_dev);
2259 
2260     VMW_CBPRN("Starting uninit...");
2261 
2262     vmxnet3_net_uninit(s);
2263 
2264     vmxnet3_cleanup_msix(s);
2265 
2266     vmxnet3_cleanup_msi(s);
2267 }
2268 
2269 static void vmxnet3_qdev_reset(DeviceState *dev)
2270 {
2271     PCIDevice *d = PCI_DEVICE(dev);
2272     VMXNET3State *s = VMXNET3(d);
2273 
2274     VMW_CBPRN("Starting QDEV reset...");
2275     vmxnet3_reset(s);
2276 }
2277 
2278 static bool vmxnet3_mc_list_needed(void *opaque)
2279 {
2280     return true;
2281 }
2282 
2283 static int vmxnet3_mcast_list_pre_load(void *opaque)
2284 {
2285     VMXNET3State *s = opaque;
2286 
2287     s->mcast_list = g_malloc(s->mcast_list_buff_size);
2288 
2289     return 0;
2290 }
2291 
2292 
2293 static int vmxnet3_pre_save(void *opaque)
2294 {
2295     VMXNET3State *s = opaque;
2296 
2297     s->mcast_list_buff_size = s->mcast_list_len * sizeof(MACAddr);
2298 
2299     return 0;
2300 }
2301 
2302 static const VMStateDescription vmxstate_vmxnet3_mcast_list = {
2303     .name = "vmxnet3/mcast_list",
2304     .version_id = 1,
2305     .minimum_version_id = 1,
2306     .pre_load = vmxnet3_mcast_list_pre_load,
2307     .needed = vmxnet3_mc_list_needed,
2308     .fields = (const VMStateField[]) {
2309         VMSTATE_VBUFFER_UINT32(mcast_list, VMXNET3State, 0, NULL,
2310             mcast_list_buff_size),
2311         VMSTATE_END_OF_LIST()
2312     }
2313 };
2314 
2315 static const VMStateDescription vmstate_vmxnet3_ring = {
2316     .name = "vmxnet3-ring",
2317     .version_id = 0,
2318     .fields = (const VMStateField[]) {
2319         VMSTATE_UINT64(pa, Vmxnet3Ring),
2320         VMSTATE_UINT32(size, Vmxnet3Ring),
2321         VMSTATE_UINT32(cell_size, Vmxnet3Ring),
2322         VMSTATE_UINT32(next, Vmxnet3Ring),
2323         VMSTATE_UINT8(gen, Vmxnet3Ring),
2324         VMSTATE_END_OF_LIST()
2325     }
2326 };
2327 
2328 static const VMStateDescription vmstate_vmxnet3_tx_stats = {
2329     .name = "vmxnet3-tx-stats",
2330     .version_id = 0,
2331     .fields = (const VMStateField[]) {
2332         VMSTATE_UINT64(TSOPktsTxOK, struct UPT1_TxStats),
2333         VMSTATE_UINT64(TSOBytesTxOK, struct UPT1_TxStats),
2334         VMSTATE_UINT64(ucastPktsTxOK, struct UPT1_TxStats),
2335         VMSTATE_UINT64(ucastBytesTxOK, struct UPT1_TxStats),
2336         VMSTATE_UINT64(mcastPktsTxOK, struct UPT1_TxStats),
2337         VMSTATE_UINT64(mcastBytesTxOK, struct UPT1_TxStats),
2338         VMSTATE_UINT64(bcastPktsTxOK, struct UPT1_TxStats),
2339         VMSTATE_UINT64(bcastBytesTxOK, struct UPT1_TxStats),
2340         VMSTATE_UINT64(pktsTxError, struct UPT1_TxStats),
2341         VMSTATE_UINT64(pktsTxDiscard, struct UPT1_TxStats),
2342         VMSTATE_END_OF_LIST()
2343     }
2344 };
2345 
2346 static const VMStateDescription vmstate_vmxnet3_txq_descr = {
2347     .name = "vmxnet3-txq-descr",
2348     .version_id = 0,
2349     .fields = (const VMStateField[]) {
2350         VMSTATE_STRUCT(tx_ring, Vmxnet3TxqDescr, 0, vmstate_vmxnet3_ring,
2351                        Vmxnet3Ring),
2352         VMSTATE_STRUCT(comp_ring, Vmxnet3TxqDescr, 0, vmstate_vmxnet3_ring,
2353                        Vmxnet3Ring),
2354         VMSTATE_UINT8(intr_idx, Vmxnet3TxqDescr),
2355         VMSTATE_UINT64(tx_stats_pa, Vmxnet3TxqDescr),
2356         VMSTATE_STRUCT(txq_stats, Vmxnet3TxqDescr, 0, vmstate_vmxnet3_tx_stats,
2357                        struct UPT1_TxStats),
2358         VMSTATE_END_OF_LIST()
2359     }
2360 };
2361 
2362 static const VMStateDescription vmstate_vmxnet3_rx_stats = {
2363     .name = "vmxnet3-rx-stats",
2364     .version_id = 0,
2365     .fields = (const VMStateField[]) {
2366         VMSTATE_UINT64(LROPktsRxOK, struct UPT1_RxStats),
2367         VMSTATE_UINT64(LROBytesRxOK, struct UPT1_RxStats),
2368         VMSTATE_UINT64(ucastPktsRxOK, struct UPT1_RxStats),
2369         VMSTATE_UINT64(ucastBytesRxOK, struct UPT1_RxStats),
2370         VMSTATE_UINT64(mcastPktsRxOK, struct UPT1_RxStats),
2371         VMSTATE_UINT64(mcastBytesRxOK, struct UPT1_RxStats),
2372         VMSTATE_UINT64(bcastPktsRxOK, struct UPT1_RxStats),
2373         VMSTATE_UINT64(bcastBytesRxOK, struct UPT1_RxStats),
2374         VMSTATE_UINT64(pktsRxOutOfBuf, struct UPT1_RxStats),
2375         VMSTATE_UINT64(pktsRxError, struct UPT1_RxStats),
2376         VMSTATE_END_OF_LIST()
2377     }
2378 };
2379 
2380 static const VMStateDescription vmstate_vmxnet3_rxq_descr = {
2381     .name = "vmxnet3-rxq-descr",
2382     .version_id = 0,
2383     .fields = (const VMStateField[]) {
2384         VMSTATE_STRUCT_ARRAY(rx_ring, Vmxnet3RxqDescr,
2385                              VMXNET3_RX_RINGS_PER_QUEUE, 0,
2386                              vmstate_vmxnet3_ring, Vmxnet3Ring),
2387         VMSTATE_STRUCT(comp_ring, Vmxnet3RxqDescr, 0, vmstate_vmxnet3_ring,
2388                        Vmxnet3Ring),
2389         VMSTATE_UINT8(intr_idx, Vmxnet3RxqDescr),
2390         VMSTATE_UINT64(rx_stats_pa, Vmxnet3RxqDescr),
2391         VMSTATE_STRUCT(rxq_stats, Vmxnet3RxqDescr, 0, vmstate_vmxnet3_rx_stats,
2392                        struct UPT1_RxStats),
2393         VMSTATE_END_OF_LIST()
2394     }
2395 };
2396 
2397 static int vmxnet3_post_load(void *opaque, int version_id)
2398 {
2399     VMXNET3State *s = opaque;
2400 
2401     net_tx_pkt_init(&s->tx_pkt, s->max_tx_frags);
2402     net_rx_pkt_init(&s->rx_pkt);
2403 
2404     if (s->msix_used) {
2405         vmxnet3_use_msix_vectors(s, VMXNET3_MAX_INTRS);
2406     }
2407 
2408     if (!vmxnet3_validate_queues(s)) {
2409         return -1;
2410     }
2411     vmxnet3_validate_interrupts(s);
2412 
2413     return 0;
2414 }
2415 
2416 static const VMStateDescription vmstate_vmxnet3_int_state = {
2417     .name = "vmxnet3-int-state",
2418     .version_id = 0,
2419     .fields = (const VMStateField[]) {
2420         VMSTATE_BOOL(is_masked, Vmxnet3IntState),
2421         VMSTATE_BOOL(is_pending, Vmxnet3IntState),
2422         VMSTATE_BOOL(is_asserted, Vmxnet3IntState),
2423         VMSTATE_END_OF_LIST()
2424     }
2425 };
2426 
2427 static const VMStateDescription vmstate_vmxnet3 = {
2428     .name = "vmxnet3",
2429     .version_id = 1,
2430     .minimum_version_id = 1,
2431     .pre_save = vmxnet3_pre_save,
2432     .post_load = vmxnet3_post_load,
2433     .fields = (const VMStateField[]) {
2434             VMSTATE_PCI_DEVICE(parent_obj, VMXNET3State),
2435             VMSTATE_MSIX(parent_obj, VMXNET3State),
2436             VMSTATE_BOOL(rx_packets_compound, VMXNET3State),
2437             VMSTATE_BOOL(rx_vlan_stripping, VMXNET3State),
2438             VMSTATE_BOOL(lro_supported, VMXNET3State),
2439             VMSTATE_UINT32(rx_mode, VMXNET3State),
2440             VMSTATE_UINT32(mcast_list_len, VMXNET3State),
2441             VMSTATE_UINT32(mcast_list_buff_size, VMXNET3State),
2442             VMSTATE_UINT32_ARRAY(vlan_table, VMXNET3State, VMXNET3_VFT_SIZE),
2443             VMSTATE_UINT32(mtu, VMXNET3State),
2444             VMSTATE_UINT16(max_rx_frags, VMXNET3State),
2445             VMSTATE_UINT32(max_tx_frags, VMXNET3State),
2446             VMSTATE_UINT8(event_int_idx, VMXNET3State),
2447             VMSTATE_BOOL(auto_int_masking, VMXNET3State),
2448             VMSTATE_UINT8(txq_num, VMXNET3State),
2449             VMSTATE_UINT8(rxq_num, VMXNET3State),
2450             VMSTATE_UINT32(device_active, VMXNET3State),
2451             VMSTATE_UINT32(last_command, VMXNET3State),
2452             VMSTATE_UINT32(link_status_and_speed, VMXNET3State),
2453             VMSTATE_UINT32(temp_mac, VMXNET3State),
2454             VMSTATE_UINT64(drv_shmem, VMXNET3State),
2455             VMSTATE_UINT64(temp_shared_guest_driver_memory, VMXNET3State),
2456 
2457             VMSTATE_STRUCT_ARRAY(txq_descr, VMXNET3State,
2458                 VMXNET3_DEVICE_MAX_TX_QUEUES, 0, vmstate_vmxnet3_txq_descr,
2459                 Vmxnet3TxqDescr),
2460             VMSTATE_STRUCT_ARRAY(rxq_descr, VMXNET3State,
2461                 VMXNET3_DEVICE_MAX_RX_QUEUES, 0, vmstate_vmxnet3_rxq_descr,
2462                 Vmxnet3RxqDescr),
2463             VMSTATE_STRUCT_ARRAY(interrupt_states, VMXNET3State,
2464                 VMXNET3_MAX_INTRS, 0, vmstate_vmxnet3_int_state,
2465                 Vmxnet3IntState),
2466 
2467             VMSTATE_END_OF_LIST()
2468     },
2469     .subsections = (const VMStateDescription * const []) {
2470         &vmxstate_vmxnet3_mcast_list,
2471         NULL
2472     }
2473 };
2474 
2475 static Property vmxnet3_properties[] = {
2476     DEFINE_NIC_PROPERTIES(VMXNET3State, conf),
2477     DEFINE_PROP_BIT("x-old-msi-offsets", VMXNET3State, compat_flags,
2478                     VMXNET3_COMPAT_FLAG_OLD_MSI_OFFSETS_BIT, false),
2479     DEFINE_PROP_BIT("x-disable-pcie", VMXNET3State, compat_flags,
2480                     VMXNET3_COMPAT_FLAG_DISABLE_PCIE_BIT, false),
2481     DEFINE_PROP_END_OF_LIST(),
2482 };
2483 
2484 static void vmxnet3_realize(DeviceState *qdev, Error **errp)
2485 {
2486     VMXNET3Class *vc = VMXNET3_DEVICE_GET_CLASS(qdev);
2487     PCIDevice *pci_dev = PCI_DEVICE(qdev);
2488     VMXNET3State *s = VMXNET3(qdev);
2489 
2490     if (!(s->compat_flags & VMXNET3_COMPAT_FLAG_DISABLE_PCIE)) {
2491         pci_dev->cap_present |= QEMU_PCI_CAP_EXPRESS;
2492     }
2493 
2494     vc->parent_dc_realize(qdev, errp);
2495 }
2496 
2497 static void vmxnet3_class_init(ObjectClass *class, void *data)
2498 {
2499     DeviceClass *dc = DEVICE_CLASS(class);
2500     PCIDeviceClass *c = PCI_DEVICE_CLASS(class);
2501     VMXNET3Class *vc = VMXNET3_DEVICE_CLASS(class);
2502 
2503     c->realize = vmxnet3_pci_realize;
2504     c->exit = vmxnet3_pci_uninit;
2505     c->vendor_id = PCI_VENDOR_ID_VMWARE;
2506     c->device_id = PCI_DEVICE_ID_VMWARE_VMXNET3;
2507     c->revision = PCI_DEVICE_ID_VMWARE_VMXNET3_REVISION;
2508     c->romfile = "efi-vmxnet3.rom";
2509     c->class_id = PCI_CLASS_NETWORK_ETHERNET;
2510     c->subsystem_vendor_id = PCI_VENDOR_ID_VMWARE;
2511     c->subsystem_id = PCI_DEVICE_ID_VMWARE_VMXNET3;
2512     device_class_set_parent_realize(dc, vmxnet3_realize,
2513                                     &vc->parent_dc_realize);
2514     dc->desc = "VMWare Paravirtualized Ethernet v3";
2515     dc->reset = vmxnet3_qdev_reset;
2516     dc->vmsd = &vmstate_vmxnet3;
2517     device_class_set_props(dc, vmxnet3_properties);
2518     set_bit(DEVICE_CATEGORY_NETWORK, dc->categories);
2519 }
2520 
2521 static const TypeInfo vmxnet3_info = {
2522     .name          = TYPE_VMXNET3,
2523     .parent        = TYPE_PCI_DEVICE,
2524     .class_size    = sizeof(VMXNET3Class),
2525     .instance_size = sizeof(VMXNET3State),
2526     .class_init    = vmxnet3_class_init,
2527     .instance_init = vmxnet3_instance_init,
2528     .interfaces = (InterfaceInfo[]) {
2529         { INTERFACE_PCIE_DEVICE },
2530         { INTERFACE_CONVENTIONAL_PCI_DEVICE },
2531         { }
2532     },
2533 };
2534 
2535 static void vmxnet3_register_types(void)
2536 {
2537     VMW_CBPRN("vmxnet3_register_types called...");
2538     type_register_static(&vmxnet3_info);
2539 }
2540 
2541 type_init(vmxnet3_register_types)
2542