2 * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
4 * Copyright (C) 2012-2014 Matteo Landi
5 * Copyright (C) 2012-2016 Luigi Rizzo
6 * Copyright (C) 2012-2016 Giuseppe Lettieri
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37 #endif /* __APPLE__ */
40 #include <sys/cdefs.h> /* prerequisite */
41 __FBSDID("$FreeBSD$");
43 #include <sys/types.h>
44 #include <sys/malloc.h>
45 #include <sys/kernel.h> /* MALLOC_DEFINE */
47 #include <vm/vm.h> /* vtophys */
48 #include <vm/pmap.h> /* vtophys */
49 #include <sys/socket.h> /* sockaddrs */
50 #include <sys/selinfo.h>
51 #include <sys/sysctl.h>
53 #include <net/if_var.h>
55 #include <machine/bus.h> /* bus_dmamap_* */
57 /* M_NETMAP only used in here */
58 MALLOC_DECLARE(M_NETMAP);
59 MALLOC_DEFINE(M_NETMAP, "netmap", "Network memory map");
61 #endif /* __FreeBSD__ */
67 #include <net/netmap.h>
68 #include <dev/netmap/netmap_kern.h>
69 #include <net/netmap_virt.h>
70 #include "netmap_mem2.h"
72 #ifdef _WIN32_USE_SMALL_GENERIC_DEVICES_MEMORY
73 #define NETMAP_BUF_MAX_NUM 8*4096 /* if too big takes too much time to allocate */
75 #define NETMAP_BUF_MAX_NUM 20*4096*2 /* large machine */
78 #define NETMAP_POOL_MAX_NAMSZ 32
89 struct netmap_obj_params {
97 struct netmap_obj_pool {
98 char name[NETMAP_POOL_MAX_NAMSZ]; /* name of the allocator */
100 /* ---------------------------------------------------*/
101 /* these are only meaningful if the pool is finalized */
102 /* (see 'finalized' field in netmap_mem_d) */
103 u_int objtotal; /* actual total number of objects. */
104 u_int memtotal; /* actual total memory space */
105 u_int numclusters; /* actual number of clusters */
107 u_int objfree; /* number of free objects. */
109 struct lut_entry *lut; /* virt,phys addresses, objtotal entries */
110 uint32_t *bitmap; /* one bit per buffer, 1 means free */
111 uint32_t *invalid_bitmap;/* one bit per buffer, 1 means invalid */
112 uint32_t bitmap_slots; /* number of uint32 entries in bitmap */
113 int alloc_done; /* we have allocated the memory */
114 /* ---------------------------------------------------*/
117 u_int objminsize; /* minimum object size */
118 u_int objmaxsize; /* maximum object size */
119 u_int nummin; /* minimum number of objects */
120 u_int nummax; /* maximum number of objects */
122 /* these are changed only by config */
123 u_int _objtotal; /* total number of objects */
124 u_int _objsize; /* object size */
125 u_int _clustsize; /* cluster size */
126 u_int _clustentries; /* objects per cluster */
127 u_int _numclusters; /* number of clusters */
129 /* requested values */
134 #define NMA_LOCK_T NM_MTX_T
135 #define NMA_LOCK_INIT(n) NM_MTX_INIT((n)->nm_mtx)
136 #define NMA_LOCK_DESTROY(n) NM_MTX_DESTROY((n)->nm_mtx)
137 #define NMA_LOCK(n) NM_MTX_LOCK((n)->nm_mtx)
138 #define NMA_SPINLOCK(n) NM_MTX_SPINLOCK((n)->nm_mtx)
139 #define NMA_UNLOCK(n) NM_MTX_UNLOCK((n)->nm_mtx)
141 struct netmap_mem_ops {
142 int (*nmd_get_lut)(struct netmap_mem_d *, struct netmap_lut*);
143 int (*nmd_get_info)(struct netmap_mem_d *, uint64_t *size,
144 u_int *memflags, uint16_t *id);
146 vm_paddr_t (*nmd_ofstophys)(struct netmap_mem_d *, vm_ooffset_t);
147 int (*nmd_config)(struct netmap_mem_d *);
148 int (*nmd_finalize)(struct netmap_mem_d *);
149 void (*nmd_deref)(struct netmap_mem_d *);
150 ssize_t (*nmd_if_offset)(struct netmap_mem_d *, const void *vaddr);
151 void (*nmd_delete)(struct netmap_mem_d *);
153 struct netmap_if * (*nmd_if_new)(struct netmap_adapter *,
154 struct netmap_priv_d *);
155 void (*nmd_if_delete)(struct netmap_adapter *, struct netmap_if *);
156 int (*nmd_rings_create)(struct netmap_adapter *);
157 void (*nmd_rings_delete)(struct netmap_adapter *);
160 struct netmap_mem_d {
161 NMA_LOCK_T nm_mtx; /* protect the allocator */
162 u_int nm_totalsize; /* shorthand */
165 #define NETMAP_MEM_FINALIZED 0x1 /* preallocation done */
166 #define NETMAP_MEM_HIDDEN 0x8 /* beeing prepared */
167 int lasterr; /* last error for curr config */
168 int active; /* active users */
170 /* the three allocators */
171 struct netmap_obj_pool pools[NETMAP_POOLS_NR];
173 nm_memid_t nm_id; /* allocator identifier */
174 int nm_grp; /* iommu groupd id */
176 /* list of all existing allocators, sorted by nm_id */
177 struct netmap_mem_d *prev, *next;
179 struct netmap_mem_ops *ops;
181 struct netmap_obj_params params[NETMAP_POOLS_NR];
183 #define NM_MEM_NAMESZ 16
184 char name[NM_MEM_NAMESZ];
188 netmap_mem_get_lut(struct netmap_mem_d *nmd, struct netmap_lut *lut)
193 rv = nmd->ops->nmd_get_lut(nmd, lut);
200 netmap_mem_get_info(struct netmap_mem_d *nmd, uint64_t *size,
201 u_int *memflags, nm_memid_t *memid)
206 rv = nmd->ops->nmd_get_info(nmd, size, memflags, memid);
213 netmap_mem_ofstophys(struct netmap_mem_d *nmd, vm_ooffset_t off)
217 #if defined(__FreeBSD__)
218 /* This function is called by netmap_dev_pager_fault(), which holds a
219 * non-sleepable lock since FreeBSD 12. Since we cannot sleep, we
220 * spin on the trylock. */
225 pa = nmd->ops->nmd_ofstophys(nmd, off);
232 netmap_mem_config(struct netmap_mem_d *nmd)
235 /* already in use. Not fatal, but we
236 * cannot change the configuration
241 return nmd->ops->nmd_config(nmd);
245 netmap_mem_if_offset(struct netmap_mem_d *nmd, const void *off)
250 rv = nmd->ops->nmd_if_offset(nmd, off);
257 netmap_mem_delete(struct netmap_mem_d *nmd)
259 nmd->ops->nmd_delete(nmd);
263 netmap_mem_if_new(struct netmap_adapter *na, struct netmap_priv_d *priv)
265 struct netmap_if *nifp;
266 struct netmap_mem_d *nmd = na->nm_mem;
269 nifp = nmd->ops->nmd_if_new(na, priv);
276 netmap_mem_if_delete(struct netmap_adapter *na, struct netmap_if *nif)
278 struct netmap_mem_d *nmd = na->nm_mem;
281 nmd->ops->nmd_if_delete(na, nif);
286 netmap_mem_rings_create(struct netmap_adapter *na)
289 struct netmap_mem_d *nmd = na->nm_mem;
292 rv = nmd->ops->nmd_rings_create(na);
299 netmap_mem_rings_delete(struct netmap_adapter *na)
301 struct netmap_mem_d *nmd = na->nm_mem;
304 nmd->ops->nmd_rings_delete(na);
308 static int netmap_mem_map(struct netmap_obj_pool *, struct netmap_adapter *);
309 static int netmap_mem_unmap(struct netmap_obj_pool *, struct netmap_adapter *);
310 static int nm_mem_assign_group(struct netmap_mem_d *, struct device *);
311 static void nm_mem_release_id(struct netmap_mem_d *);
314 netmap_mem_get_id(struct netmap_mem_d *nmd)
319 #ifdef NM_DEBUG_MEM_PUTGET
320 #define NM_DBG_REFC(nmd, func, line) \
321 nm_prinf("%d mem[%d] -> %d", line, (nmd)->nm_id, (nmd)->refcount);
323 #define NM_DBG_REFC(nmd, func, line)
326 /* circular list of all existing allocators */
327 static struct netmap_mem_d *netmap_last_mem_d = &nm_mem;
328 NM_MTX_T nm_mem_list_lock;
330 struct netmap_mem_d *
331 __netmap_mem_get(struct netmap_mem_d *nmd, const char *func, int line)
333 NM_MTX_LOCK(nm_mem_list_lock);
335 NM_DBG_REFC(nmd, func, line);
336 NM_MTX_UNLOCK(nm_mem_list_lock);
341 __netmap_mem_put(struct netmap_mem_d *nmd, const char *func, int line)
344 NM_MTX_LOCK(nm_mem_list_lock);
345 last = (--nmd->refcount == 0);
347 nm_mem_release_id(nmd);
348 NM_DBG_REFC(nmd, func, line);
349 NM_MTX_UNLOCK(nm_mem_list_lock);
351 netmap_mem_delete(nmd);
355 netmap_mem_finalize(struct netmap_mem_d *nmd, struct netmap_adapter *na)
358 if (nm_mem_assign_group(nmd, na->pdev) < 0) {
364 if (netmap_mem_config(nmd))
369 nmd->lasterr = nmd->ops->nmd_finalize(nmd);
371 if (!nmd->lasterr && na->pdev) {
372 nmd->lasterr = netmap_mem_map(&nmd->pools[NETMAP_BUF_POOL], na);
376 lasterr = nmd->lasterr;
380 netmap_mem_deref(nmd, na);
386 nm_isset(uint32_t *bitmap, u_int i)
388 return bitmap[ (i>>5) ] & ( 1U << (i & 31U) );
393 netmap_init_obj_allocator_bitmap(struct netmap_obj_pool *p)
397 if (p->bitmap == NULL) {
398 /* Allocate the bitmap */
399 n = (p->objtotal + 31) / 32;
400 p->bitmap = nm_os_malloc(sizeof(p->bitmap[0]) * n);
401 if (p->bitmap == NULL) {
402 nm_prerr("Unable to create bitmap (%d entries) for allocator '%s'", (int)n,
408 memset(p->bitmap, 0, p->bitmap_slots * sizeof(p->bitmap[0]));
413 * Set all the bits in the bitmap that have
414 * corresponding buffers to 1 to indicate they are
417 for (j = 0; j < p->objtotal; j++) {
418 if (p->invalid_bitmap && nm_isset(p->invalid_bitmap, j)) {
419 if (netmap_debug & NM_DEBUG_MEM)
420 nm_prinf("skipping %s %d", p->name, j);
423 p->bitmap[ (j>>5) ] |= ( 1U << (j & 31U) );
428 nm_prinf("%s free %u", p->name, p->objfree);
429 if (p->objfree == 0) {
431 nm_prerr("%s: no objects available", p->name);
439 netmap_mem_init_bitmaps(struct netmap_mem_d *nmd)
443 for (i = 0; i < NETMAP_POOLS_NR; i++) {
444 struct netmap_obj_pool *p = &nmd->pools[i];
446 error = netmap_init_obj_allocator_bitmap(p);
452 * buffers 0 and 1 are reserved
454 if (nmd->pools[NETMAP_BUF_POOL].objfree < 2) {
455 nm_prerr("%s: not enough buffers", nmd->pools[NETMAP_BUF_POOL].name);
459 nmd->pools[NETMAP_BUF_POOL].objfree -= 2;
460 if (nmd->pools[NETMAP_BUF_POOL].bitmap) {
461 /* XXX This check is a workaround that prevents a
462 * NULL pointer crash which currently happens only
463 * with ptnetmap guests.
464 * Removed shared-info --> is the bug still there? */
465 nmd->pools[NETMAP_BUF_POOL].bitmap[0] = ~3U;
471 netmap_mem_deref(struct netmap_mem_d *nmd, struct netmap_adapter *na)
475 if (na->active_fds <= 0)
476 netmap_mem_unmap(&nmd->pools[NETMAP_BUF_POOL], na);
477 if (nmd->active == 1) {
480 * Reset the allocator when it falls out of use so that any
481 * pool resources leaked by unclean application exits are
484 netmap_mem_init_bitmaps(nmd);
486 nmd->ops->nmd_deref(nmd);
499 /* accessor functions */
501 netmap_mem2_get_lut(struct netmap_mem_d *nmd, struct netmap_lut *lut)
503 lut->lut = nmd->pools[NETMAP_BUF_POOL].lut;
505 lut->plut = lut->lut;
507 lut->objtotal = nmd->pools[NETMAP_BUF_POOL].objtotal;
508 lut->objsize = nmd->pools[NETMAP_BUF_POOL]._objsize;
513 static struct netmap_obj_params netmap_min_priv_params[NETMAP_POOLS_NR] = {
518 [NETMAP_RING_POOL] = {
522 [NETMAP_BUF_POOL] = {
530 * nm_mem is the memory allocator used for all physical interfaces
531 * running in netmap mode.
532 * Virtual (VALE) ports will have each its own allocator.
534 extern struct netmap_mem_ops netmap_mem_global_ops; /* forward */
535 struct netmap_mem_d nm_mem = { /* Our memory allocator. */
539 .objminsize = sizeof(struct netmap_if),
541 .nummin = 10, /* don't be stingy */
542 .nummax = 10000, /* XXX very large */
544 [NETMAP_RING_POOL] = {
545 .name = "netmap_ring",
546 .objminsize = sizeof(struct netmap_ring),
547 .objmaxsize = 32*PAGE_SIZE,
551 [NETMAP_BUF_POOL] = {
552 .name = "netmap_buf",
556 .nummax = 1000000, /* one million! */
565 [NETMAP_RING_POOL] = {
569 [NETMAP_BUF_POOL] = {
571 .num = NETMAP_BUF_MAX_NUM,
581 .ops = &netmap_mem_global_ops,
587 /* blueprint for the private memory allocators */
588 /* XXX clang is not happy about using name as a print format */
589 static const struct netmap_mem_d nm_blueprint = {
593 .objminsize = sizeof(struct netmap_if),
598 [NETMAP_RING_POOL] = {
600 .objminsize = sizeof(struct netmap_ring),
601 .objmaxsize = 32*PAGE_SIZE,
605 [NETMAP_BUF_POOL] = {
610 .nummax = 1000000, /* one million! */
616 .flags = NETMAP_MEM_PRIVATE,
618 .ops = &netmap_mem_global_ops,
621 /* memory allocator related sysctls */
623 #define STRINGIFY(x) #x
626 #define DECLARE_SYSCTLS(id, name) \
627 SYSBEGIN(mem2_ ## name); \
628 SYSCTL_INT(_dev_netmap, OID_AUTO, name##_size, \
629 CTLFLAG_RW, &nm_mem.params[id].size, 0, "Requested size of netmap " STRINGIFY(name) "s"); \
630 SYSCTL_INT(_dev_netmap, OID_AUTO, name##_curr_size, \
631 CTLFLAG_RD, &nm_mem.pools[id]._objsize, 0, "Current size of netmap " STRINGIFY(name) "s"); \
632 SYSCTL_INT(_dev_netmap, OID_AUTO, name##_num, \
633 CTLFLAG_RW, &nm_mem.params[id].num, 0, "Requested number of netmap " STRINGIFY(name) "s"); \
634 SYSCTL_INT(_dev_netmap, OID_AUTO, name##_curr_num, \
635 CTLFLAG_RD, &nm_mem.pools[id].objtotal, 0, "Current number of netmap " STRINGIFY(name) "s"); \
636 SYSCTL_INT(_dev_netmap, OID_AUTO, priv_##name##_size, \
637 CTLFLAG_RW, &netmap_min_priv_params[id].size, 0, \
638 "Default size of private netmap " STRINGIFY(name) "s"); \
639 SYSCTL_INT(_dev_netmap, OID_AUTO, priv_##name##_num, \
640 CTLFLAG_RW, &netmap_min_priv_params[id].num, 0, \
641 "Default number of private netmap " STRINGIFY(name) "s"); \
644 SYSCTL_DECL(_dev_netmap);
645 DECLARE_SYSCTLS(NETMAP_IF_POOL, if);
646 DECLARE_SYSCTLS(NETMAP_RING_POOL, ring);
647 DECLARE_SYSCTLS(NETMAP_BUF_POOL, buf);
649 /* call with nm_mem_list_lock held */
651 nm_mem_assign_id_locked(struct netmap_mem_d *nmd)
654 struct netmap_mem_d *scan = netmap_last_mem_d;
658 /* we rely on unsigned wrap around */
659 id = scan->nm_id + 1;
660 if (id == 0) /* reserve 0 as error value */
663 if (id != scan->nm_id) {
665 nmd->prev = scan->prev;
667 scan->prev->next = nmd;
669 netmap_last_mem_d = nmd;
671 NM_DBG_REFC(nmd, __FUNCTION__, __LINE__);
675 } while (scan != netmap_last_mem_d);
680 /* call with nm_mem_list_lock *not* held */
682 nm_mem_assign_id(struct netmap_mem_d *nmd)
686 NM_MTX_LOCK(nm_mem_list_lock);
687 ret = nm_mem_assign_id_locked(nmd);
688 NM_MTX_UNLOCK(nm_mem_list_lock);
693 /* call with nm_mem_list_lock held */
695 nm_mem_release_id(struct netmap_mem_d *nmd)
697 nmd->prev->next = nmd->next;
698 nmd->next->prev = nmd->prev;
700 if (netmap_last_mem_d == nmd)
701 netmap_last_mem_d = nmd->prev;
703 nmd->prev = nmd->next = NULL;
706 struct netmap_mem_d *
707 netmap_mem_find(nm_memid_t id)
709 struct netmap_mem_d *nmd;
711 NM_MTX_LOCK(nm_mem_list_lock);
712 nmd = netmap_last_mem_d;
714 if (!(nmd->flags & NETMAP_MEM_HIDDEN) && nmd->nm_id == id) {
716 NM_DBG_REFC(nmd, __FUNCTION__, __LINE__);
717 NM_MTX_UNLOCK(nm_mem_list_lock);
721 } while (nmd != netmap_last_mem_d);
722 NM_MTX_UNLOCK(nm_mem_list_lock);
727 nm_mem_assign_group(struct netmap_mem_d *nmd, struct device *dev)
730 id = nm_iommu_group_id(dev);
731 if (netmap_debug & NM_DEBUG_MEM)
732 nm_prinf("iommu_group %d", id);
739 if (nmd->nm_grp != id) {
741 nm_prerr("iommu group mismatch: %u vs %u",
743 nmd->lasterr = err = ENOMEM;
750 static struct lut_entry *
751 nm_alloc_lut(u_int nobj)
753 size_t n = sizeof(struct lut_entry) * nobj;
754 struct lut_entry *lut;
758 lut = nm_os_malloc(n);
764 nm_free_lut(struct lut_entry *lut, u_int objtotal)
766 bzero(lut, sizeof(struct lut_entry) * objtotal);
774 #if defined(linux) || defined(_WIN32)
775 static struct plut_entry *
776 nm_alloc_plut(u_int nobj)
778 size_t n = sizeof(struct plut_entry) * nobj;
779 struct plut_entry *lut;
785 nm_free_plut(struct plut_entry * lut)
789 #endif /* linux or _WIN32 */
793 * First, find the allocator that contains the requested offset,
794 * then locate the cluster through a lookup table.
797 netmap_mem2_ofstophys(struct netmap_mem_d* nmd, vm_ooffset_t offset)
800 vm_ooffset_t o = offset;
802 struct netmap_obj_pool *p;
806 for (i = 0; i < NETMAP_POOLS_NR; offset -= p[i].memtotal, i++) {
807 if (offset >= p[i].memtotal)
809 // now lookup the cluster's address
811 pa = vtophys(p[i].lut[offset / p[i]._objsize].vaddr) +
812 offset % p[i]._objsize;
814 pa = vtophys(p[i].lut[offset / p[i]._objsize].vaddr);
815 pa.QuadPart += offset % p[i]._objsize;
819 /* this is only in case of errors */
820 nm_prerr("invalid ofs 0x%x out of 0x%x 0x%x 0x%x", (u_int)o,
821 p[NETMAP_IF_POOL].memtotal,
822 p[NETMAP_IF_POOL].memtotal
823 + p[NETMAP_RING_POOL].memtotal,
824 p[NETMAP_IF_POOL].memtotal
825 + p[NETMAP_RING_POOL].memtotal
826 + p[NETMAP_BUF_POOL].memtotal);
828 return 0; /* bad address */
839 * win32_build_virtual_memory_for_userspace
841 * This function get all the object making part of the pools and maps
842 * a contiguous virtual memory space for the userspace
844 * 1 - allocate a Memory Descriptor List wide as the sum
845 * of the memory needed for the pools
846 * 2 - cycle all the objects in every pool and for every object do
848 * 2a - cycle all the objects in every pool, get the list
849 * of the physical address descriptors
850 * 2b - calculate the offset in the array of pages desciptor in the
852 * 2c - copy the descriptors of the object in the main MDL
854 * 3 - return the resulting MDL that needs to be mapped in userland
856 * In this way we will have an MDL that describes all the memory for the
857 * objects in a single object
861 win32_build_user_vm_map(struct netmap_mem_d* nmd)
863 u_int memflags, ofs = 0;
864 PMDL mainMdl, tempMdl;
868 if (netmap_mem_get_info(nmd, &memsize, &memflags, NULL)) {
869 nm_prerr("memory not finalised yet");
873 mainMdl = IoAllocateMdl(NULL, memsize, FALSE, FALSE, NULL);
874 if (mainMdl == NULL) {
875 nm_prerr("failed to allocate mdl");
880 for (i = 0; i < NETMAP_POOLS_NR; i++) {
881 struct netmap_obj_pool *p = &nmd->pools[i];
882 int clsz = p->_clustsize;
883 int clobjs = p->_clustentries; /* objects per cluster */
884 int mdl_len = sizeof(PFN_NUMBER) * BYTES_TO_PAGES(clsz);
885 PPFN_NUMBER pSrc, pDst;
887 /* each pool has a different cluster size so we need to reallocate */
888 tempMdl = IoAllocateMdl(p->lut[0].vaddr, clsz, FALSE, FALSE, NULL);
889 if (tempMdl == NULL) {
891 nm_prerr("fail to allocate tempMdl");
895 pSrc = MmGetMdlPfnArray(tempMdl);
896 /* create one entry per cluster, the lut[] has one entry per object */
897 for (j = 0; j < p->numclusters; j++, ofs += clsz) {
898 pDst = &MmGetMdlPfnArray(mainMdl)[BYTES_TO_PAGES(ofs)];
899 MmInitializeMdl(tempMdl, p->lut[j*clobjs].vaddr, clsz);
900 MmBuildMdlForNonPagedPool(tempMdl); /* compute physical page addresses */
901 RtlCopyMemory(pDst, pSrc, mdl_len); /* copy the page descriptors */
902 mainMdl->MdlFlags = tempMdl->MdlFlags; /* XXX what is in here ? */
913 * helper function for OS-specific mmap routines (currently only windows).
914 * Given an nmd and a pool index, returns the cluster size and number of clusters.
915 * Returns 0 if memory is finalised and the pool is valid, otherwise 1.
916 * It should be called under NMA_LOCK(nmd) otherwise the underlying info can change.
920 netmap_mem2_get_pool_info(struct netmap_mem_d* nmd, u_int pool, u_int *clustsize, u_int *numclusters)
922 if (!nmd || !clustsize || !numclusters || pool >= NETMAP_POOLS_NR)
923 return 1; /* invalid arguments */
924 // NMA_LOCK_ASSERT(nmd);
925 if (!(nmd->flags & NETMAP_MEM_FINALIZED)) {
926 *clustsize = *numclusters = 0;
927 return 1; /* not ready yet */
929 *clustsize = nmd->pools[pool]._clustsize;
930 *numclusters = nmd->pools[pool].numclusters;
931 return 0; /* success */
935 netmap_mem2_get_info(struct netmap_mem_d* nmd, uint64_t* size,
936 u_int *memflags, nm_memid_t *id)
939 error = netmap_mem_config(nmd);
943 if (nmd->flags & NETMAP_MEM_FINALIZED) {
944 *size = nmd->nm_totalsize;
948 for (i = 0; i < NETMAP_POOLS_NR; i++) {
949 struct netmap_obj_pool *p = nmd->pools + i;
950 *size += (p->_numclusters * p->_clustsize);
955 *memflags = nmd->flags;
963 * we store objects by kernel address, need to find the offset
964 * within the pool to export the value to userspace.
965 * Algorithm: scan until we find the cluster, then add the
966 * actual offset in the cluster
969 netmap_obj_offset(struct netmap_obj_pool *p, const void *vaddr)
971 int i, k = p->_clustentries, n = p->objtotal;
974 for (i = 0; i < n; i += k, ofs += p->_clustsize) {
975 const char *base = p->lut[i].vaddr;
976 ssize_t relofs = (const char *) vaddr - base;
978 if (relofs < 0 || relofs >= p->_clustsize)
982 ND("%s: return offset %d (cluster %d) for pointer %p",
983 p->name, ofs, i, vaddr);
986 nm_prerr("address %p is not contained inside any cluster (%s)",
988 return 0; /* An error occurred */
991 /* Helper functions which convert virtual addresses to offsets */
992 #define netmap_if_offset(n, v) \
993 netmap_obj_offset(&(n)->pools[NETMAP_IF_POOL], (v))
995 #define netmap_ring_offset(n, v) \
996 ((n)->pools[NETMAP_IF_POOL].memtotal + \
997 netmap_obj_offset(&(n)->pools[NETMAP_RING_POOL], (v)))
1000 netmap_mem2_if_offset(struct netmap_mem_d *nmd, const void *addr)
1002 return netmap_if_offset(nmd, addr);
1006 * report the index, and use start position as a hint,
1007 * otherwise buffer allocation becomes terribly expensive.
1010 netmap_obj_malloc(struct netmap_obj_pool *p, u_int len, uint32_t *start, uint32_t *index)
1012 uint32_t i = 0; /* index in the bitmap */
1013 uint32_t mask, j = 0; /* slot counter */
1016 if (len > p->_objsize) {
1017 nm_prerr("%s request size %d too large", p->name, len);
1021 if (p->objfree == 0) {
1022 nm_prerr("no more %s objects", p->name);
1028 /* termination is guaranteed by p->free, but better check bounds on i */
1029 while (vaddr == NULL && i < p->bitmap_slots) {
1030 uint32_t cur = p->bitmap[i];
1031 if (cur == 0) { /* bitmask is fully used */
1036 for (j = 0, mask = 1; (cur & mask) == 0; j++, mask <<= 1)
1039 p->bitmap[i] &= ~mask; /* mark object as in use */
1042 vaddr = p->lut[i * 32 + j].vaddr;
1044 *index = i * 32 + j;
1046 ND("%s allocator: allocated object @ [%d][%d]: vaddr %p",p->name, i, j, vaddr);
1055 * free by index, not by address.
1056 * XXX should we also cleanup the content ?
1059 netmap_obj_free(struct netmap_obj_pool *p, uint32_t j)
1061 uint32_t *ptr, mask;
1063 if (j >= p->objtotal) {
1064 nm_prerr("invalid index %u, max %u", j, p->objtotal);
1067 ptr = &p->bitmap[j / 32];
1068 mask = (1 << (j % 32));
1070 nm_prerr("ouch, double free on buffer %d", j);
1080 * free by address. This is slow but is only used for a few
1081 * objects (rings, nifp)
1084 netmap_obj_free_va(struct netmap_obj_pool *p, void *vaddr)
1086 u_int i, j, n = p->numclusters;
1088 for (i = 0, j = 0; i < n; i++, j += p->_clustentries) {
1089 void *base = p->lut[i * p->_clustentries].vaddr;
1090 ssize_t relofs = (ssize_t) vaddr - (ssize_t) base;
1092 /* Given address, is out of the scope of the current cluster.*/
1093 if (base == NULL || vaddr < base || relofs >= p->_clustsize)
1096 j = j + relofs / p->_objsize;
1097 /* KASSERT(j != 0, ("Cannot free object 0")); */
1098 netmap_obj_free(p, j);
1101 nm_prerr("address %p is not contained inside any cluster (%s)",
1106 netmap_mem_bufsize(struct netmap_mem_d *nmd)
1108 return nmd->pools[NETMAP_BUF_POOL]._objsize;
1111 #define netmap_if_malloc(n, len) netmap_obj_malloc(&(n)->pools[NETMAP_IF_POOL], len, NULL, NULL)
1112 #define netmap_if_free(n, v) netmap_obj_free_va(&(n)->pools[NETMAP_IF_POOL], (v))
1113 #define netmap_ring_malloc(n, len) netmap_obj_malloc(&(n)->pools[NETMAP_RING_POOL], len, NULL, NULL)
1114 #define netmap_ring_free(n, v) netmap_obj_free_va(&(n)->pools[NETMAP_RING_POOL], (v))
1115 #define netmap_buf_malloc(n, _pos, _index) \
1116 netmap_obj_malloc(&(n)->pools[NETMAP_BUF_POOL], netmap_mem_bufsize(n), _pos, _index)
1119 #if 0 /* currently unused */
1120 /* Return the index associated to the given packet buffer */
1121 #define netmap_buf_index(n, v) \
1122 (netmap_obj_offset(&(n)->pools[NETMAP_BUF_POOL], (v)) / NETMAP_BDG_BUF_SIZE(n))
1126 * allocate extra buffers in a linked list.
1127 * returns the actual number.
1130 netmap_extra_alloc(struct netmap_adapter *na, uint32_t *head, uint32_t n)
1132 struct netmap_mem_d *nmd = na->nm_mem;
1133 uint32_t i, pos = 0; /* opaque, scan position in the bitmap */
1137 *head = 0; /* default, 'null' index ie empty list */
1138 for (i = 0 ; i < n; i++) {
1139 uint32_t cur = *head; /* save current head */
1140 uint32_t *p = netmap_buf_malloc(nmd, &pos, head);
1142 nm_prerr("no more buffers after %d of %d", i, n);
1143 *head = cur; /* restore */
1146 ND(5, "allocate buffer %d -> %d", *head, cur);
1147 *p = cur; /* link to previous head */
1156 netmap_extra_free(struct netmap_adapter *na, uint32_t head)
1158 struct lut_entry *lut = na->na_lut.lut;
1159 struct netmap_mem_d *nmd = na->nm_mem;
1160 struct netmap_obj_pool *p = &nmd->pools[NETMAP_BUF_POOL];
1161 uint32_t i, cur, *buf;
1163 ND("freeing the extra list");
1164 for (i = 0; head >=2 && head < p->objtotal; i++) {
1166 buf = lut[head].vaddr;
1169 if (netmap_obj_free(p, cur))
1173 nm_prerr("breaking with head %d", head);
1174 if (netmap_debug & NM_DEBUG_MEM)
1175 nm_prinf("freed %d buffers", i);
1179 /* Return nonzero on error */
1181 netmap_new_bufs(struct netmap_mem_d *nmd, struct netmap_slot *slot, u_int n)
1183 struct netmap_obj_pool *p = &nmd->pools[NETMAP_BUF_POOL];
1184 u_int i = 0; /* slot counter */
1185 uint32_t pos = 0; /* slot in p->bitmap */
1186 uint32_t index = 0; /* buffer index */
1188 for (i = 0; i < n; i++) {
1189 void *vaddr = netmap_buf_malloc(nmd, &pos, &index);
1190 if (vaddr == NULL) {
1191 nm_prerr("no more buffers after %d of %d", i, n);
1194 slot[i].buf_idx = index;
1195 slot[i].len = p->_objsize;
1200 ND("%s: allocated %d buffers, %d available, first at %d", p->name, n, p->objfree, pos);
1206 netmap_obj_free(p, slot[i].buf_idx);
1208 bzero(slot, n * sizeof(slot[0]));
1213 netmap_mem_set_ring(struct netmap_mem_d *nmd, struct netmap_slot *slot, u_int n, uint32_t index)
1215 struct netmap_obj_pool *p = &nmd->pools[NETMAP_BUF_POOL];
1218 for (i = 0; i < n; i++) {
1219 slot[i].buf_idx = index;
1220 slot[i].len = p->_objsize;
1227 netmap_free_buf(struct netmap_mem_d *nmd, uint32_t i)
1229 struct netmap_obj_pool *p = &nmd->pools[NETMAP_BUF_POOL];
1231 if (i < 2 || i >= p->objtotal) {
1232 nm_prerr("Cannot free buf#%d: should be in [2, %d[", i, p->objtotal);
1235 netmap_obj_free(p, i);
1240 netmap_free_bufs(struct netmap_mem_d *nmd, struct netmap_slot *slot, u_int n)
1244 for (i = 0; i < n; i++) {
1245 if (slot[i].buf_idx > 1)
1246 netmap_free_buf(nmd, slot[i].buf_idx);
1248 ND("%s: released some buffers, available: %u",
1249 p->name, p->objfree);
1253 netmap_reset_obj_allocator(struct netmap_obj_pool *p)
1259 nm_os_free(p->bitmap);
1261 if (p->invalid_bitmap)
1262 nm_os_free(p->invalid_bitmap);
1263 p->invalid_bitmap = NULL;
1264 if (!p->alloc_done) {
1265 /* allocation was done by somebody else.
1266 * Let them clean up after themselves.
1274 * Free each cluster allocated in
1275 * netmap_finalize_obj_allocator(). The cluster start
1276 * addresses are stored at multiples of p->_clusterentries
1279 for (i = 0; i < p->objtotal; i += p->_clustentries) {
1280 contigfree(p->lut[i].vaddr, p->_clustsize, M_NETMAP);
1282 nm_free_lut(p->lut, p->objtotal);
1293 * Free all resources related to an allocator.
1296 netmap_destroy_obj_allocator(struct netmap_obj_pool *p)
1300 netmap_reset_obj_allocator(p);
1304 * We receive a request for objtotal objects, of size objsize each.
1305 * Internally we may round up both numbers, as we allocate objects
1306 * in small clusters multiple of the page size.
1307 * We need to keep track of objtotal and clustentries,
1308 * as they are needed when freeing memory.
1310 * XXX note -- userspace needs the buffers to be contiguous,
1311 * so we cannot afford gaps at the end of a cluster.
1315 /* call with NMA_LOCK held */
1317 netmap_config_obj_allocator(struct netmap_obj_pool *p, u_int objtotal, u_int objsize)
1320 u_int clustsize; /* the cluster size, multiple of page size */
1321 u_int clustentries; /* how many objects per entry */
1323 /* we store the current request, so we can
1324 * detect configuration changes later */
1325 p->r_objtotal = objtotal;
1326 p->r_objsize = objsize;
1328 #define MAX_CLUSTSIZE (1<<22) // 4 MB
1329 #define LINE_ROUND NM_CACHE_ALIGN // 64
1330 if (objsize >= MAX_CLUSTSIZE) {
1331 /* we could do it but there is no point */
1332 nm_prerr("unsupported allocation for %d bytes", objsize);
1335 /* make sure objsize is a multiple of LINE_ROUND */
1336 i = (objsize & (LINE_ROUND - 1));
1338 nm_prinf("aligning object by %d bytes", LINE_ROUND - i);
1339 objsize += LINE_ROUND - i;
1341 if (objsize < p->objminsize || objsize > p->objmaxsize) {
1342 nm_prerr("requested objsize %d out of range [%d, %d]",
1343 objsize, p->objminsize, p->objmaxsize);
1346 if (objtotal < p->nummin || objtotal > p->nummax) {
1347 nm_prerr("requested objtotal %d out of range [%d, %d]",
1348 objtotal, p->nummin, p->nummax);
1352 * Compute number of objects using a brute-force approach:
1353 * given a max cluster size,
1354 * we try to fill it with objects keeping track of the
1355 * wasted space to the next page boundary.
1357 for (clustentries = 0, i = 1;; i++) {
1358 u_int delta, used = i * objsize;
1359 if (used > MAX_CLUSTSIZE)
1361 delta = used % PAGE_SIZE;
1362 if (delta == 0) { // exact solution
1367 /* exact solution not found */
1368 if (clustentries == 0) {
1369 nm_prerr("unsupported allocation for %d bytes", objsize);
1372 /* compute clustsize */
1373 clustsize = clustentries * objsize;
1374 if (netmap_debug & NM_DEBUG_MEM)
1375 nm_prinf("objsize %d clustsize %d objects %d",
1376 objsize, clustsize, clustentries);
1379 * The number of clusters is n = ceil(objtotal/clustentries)
1380 * objtotal' = n * clustentries
1382 p->_clustentries = clustentries;
1383 p->_clustsize = clustsize;
1384 p->_numclusters = (objtotal + clustentries - 1) / clustentries;
1386 /* actual values (may be larger than requested) */
1387 p->_objsize = objsize;
1388 p->_objtotal = p->_numclusters * clustentries;
1393 /* call with NMA_LOCK held */
1395 netmap_finalize_obj_allocator(struct netmap_obj_pool *p)
1397 int i; /* must be signed */
1401 /* if the lut is already there we assume that also all the
1402 * clusters have already been allocated, possibily by somebody
1403 * else (e.g., extmem). In the latter case, the alloc_done flag
1404 * will remain at zero, so that we will not attempt to
1405 * deallocate the clusters by ourselves in
1406 * netmap_reset_obj_allocator.
1411 /* optimistically assume we have enough memory */
1412 p->numclusters = p->_numclusters;
1413 p->objtotal = p->_objtotal;
1416 p->lut = nm_alloc_lut(p->objtotal);
1417 if (p->lut == NULL) {
1418 nm_prerr("Unable to create lookup table for '%s'", p->name);
1423 * Allocate clusters, init pointers
1427 for (i = 0; i < (int)p->objtotal;) {
1428 int lim = i + p->_clustentries;
1432 * XXX Note, we only need contigmalloc() for buffers attached
1433 * to native interfaces. In all other cases (nifp, netmap rings
1434 * and even buffers for VALE ports or emulated interfaces) we
1435 * can live with standard malloc, because the hardware will not
1436 * access the pages directly.
1438 clust = contigmalloc(n, M_NETMAP, M_NOWAIT | M_ZERO,
1439 (size_t)0, -1UL, PAGE_SIZE, 0);
1440 if (clust == NULL) {
1442 * If we get here, there is a severe memory shortage,
1443 * so halve the allocated memory to reclaim some.
1445 nm_prerr("Unable to create cluster at %d for '%s' allocator",
1447 if (i < 2) /* nothing to halve */
1450 for (i--; i >= lim; i--) {
1451 if (i % p->_clustentries == 0 && p->lut[i].vaddr)
1452 contigfree(p->lut[i].vaddr,
1454 p->lut[i].vaddr = NULL;
1458 /* we may have stopped in the middle of a cluster */
1459 p->numclusters = (i + p->_clustentries - 1) / p->_clustentries;
1463 * Set lut state for all buffers in the current cluster.
1465 * [i, lim) is the set of buffer indexes that cover the
1468 * 'clust' is really the address of the current buffer in
1469 * the current cluster as we index through it with a stride
1472 for (; i < lim; i++, clust += p->_objsize) {
1473 p->lut[i].vaddr = clust;
1474 #if !defined(linux) && !defined(_WIN32)
1475 p->lut[i].paddr = vtophys(clust);
1479 p->memtotal = p->numclusters * p->_clustsize;
1481 nm_prinf("Pre-allocated %d clusters (%d/%dKB) for '%s'",
1482 p->numclusters, p->_clustsize >> 10,
1483 p->memtotal >> 10, p->name);
1488 netmap_reset_obj_allocator(p);
1492 /* call with lock held */
1494 netmap_mem_params_changed(struct netmap_obj_params* p)
1498 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1499 if (p[i].last_size != p[i].size || p[i].last_num != p[i].num) {
1500 p[i].last_size = p[i].size;
1501 p[i].last_num = p[i].num;
1509 netmap_mem_reset_all(struct netmap_mem_d *nmd)
1513 if (netmap_debug & NM_DEBUG_MEM)
1514 nm_prinf("resetting %p", nmd);
1515 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1516 netmap_reset_obj_allocator(&nmd->pools[i]);
1518 nmd->flags &= ~NETMAP_MEM_FINALIZED;
1522 netmap_mem_unmap(struct netmap_obj_pool *p, struct netmap_adapter *na)
1524 int i, lim = p->objtotal;
1525 struct netmap_lut *lut = &na->na_lut;
1527 if (na == NULL || na->pdev == NULL)
1530 #if defined(__FreeBSD__)
1531 /* On FreeBSD mapping and unmapping is performed by the txsync
1532 * and rxsync routine, packet by packet. */
1536 #elif defined(_WIN32)
1540 nm_prerr("unsupported on Windows");
1542 ND("unmapping and freeing plut for %s", na->name);
1543 if (lut->plut == NULL)
1545 for (i = 0; i < lim; i += p->_clustentries) {
1546 if (lut->plut[i].paddr)
1547 netmap_unload_map(na, (bus_dma_tag_t) na->pdev, &lut->plut[i].paddr, p->_clustsize);
1549 nm_free_plut(lut->plut);
1557 netmap_mem_map(struct netmap_obj_pool *p, struct netmap_adapter *na)
1560 int i, lim = p->objtotal;
1561 struct netmap_lut *lut = &na->na_lut;
1563 if (na->pdev == NULL)
1566 #if defined(__FreeBSD__)
1567 /* On FreeBSD mapping and unmapping is performed by the txsync
1568 * and rxsync routine, packet by packet. */
1572 #elif defined(_WIN32)
1576 nm_prerr("unsupported on Windows");
1579 if (lut->plut != NULL) {
1580 ND("plut already allocated for %s", na->name);
1584 ND("allocating physical lut for %s", na->name);
1585 lut->plut = nm_alloc_plut(lim);
1586 if (lut->plut == NULL) {
1587 nm_prerr("Failed to allocate physical lut for %s", na->name);
1591 for (i = 0; i < lim; i += p->_clustentries) {
1592 lut->plut[i].paddr = 0;
1595 for (i = 0; i < lim; i += p->_clustentries) {
1598 if (p->lut[i].vaddr == NULL)
1601 error = netmap_load_map(na, (bus_dma_tag_t) na->pdev, &lut->plut[i].paddr,
1602 p->lut[i].vaddr, p->_clustsize);
1604 nm_prerr("Failed to map cluster #%d from the %s pool", i, p->name);
1608 for (j = 1; j < p->_clustentries; j++) {
1609 lut->plut[i + j].paddr = lut->plut[i + j - 1].paddr + p->_objsize;
1614 netmap_mem_unmap(p, na);
1622 netmap_mem_finalize_all(struct netmap_mem_d *nmd)
1625 if (nmd->flags & NETMAP_MEM_FINALIZED)
1628 nmd->nm_totalsize = 0;
1629 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1630 nmd->lasterr = netmap_finalize_obj_allocator(&nmd->pools[i]);
1633 nmd->nm_totalsize += nmd->pools[i].memtotal;
1635 nmd->lasterr = netmap_mem_init_bitmaps(nmd);
1639 nmd->flags |= NETMAP_MEM_FINALIZED;
1642 nm_prinf("interfaces %d KB, rings %d KB, buffers %d MB",
1643 nmd->pools[NETMAP_IF_POOL].memtotal >> 10,
1644 nmd->pools[NETMAP_RING_POOL].memtotal >> 10,
1645 nmd->pools[NETMAP_BUF_POOL].memtotal >> 20);
1648 nm_prinf("Free buffers: %d", nmd->pools[NETMAP_BUF_POOL].objfree);
1653 netmap_mem_reset_all(nmd);
1654 return nmd->lasterr;
1658 * allocator for private memory
1661 _netmap_mem_private_new(size_t size, struct netmap_obj_params *p,
1662 struct netmap_mem_ops *ops, int *perr)
1664 struct netmap_mem_d *d = NULL;
1667 d = nm_os_malloc(size);
1676 err = nm_mem_assign_id(d);
1679 snprintf(d->name, NM_MEM_NAMESZ, "%d", d->nm_id);
1681 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1682 snprintf(d->pools[i].name, NETMAP_POOL_MAX_NAMSZ,
1683 nm_blueprint.pools[i].name,
1685 d->params[i].num = p[i].num;
1686 d->params[i].size = p[i].size;
1691 err = netmap_mem_config(d);
1695 d->flags &= ~NETMAP_MEM_FINALIZED;
1700 NMA_LOCK_DESTROY(d);
1701 nm_mem_release_id(d);
1710 struct netmap_mem_d *
1711 netmap_mem_private_new(u_int txr, u_int txd, u_int rxr, u_int rxd,
1712 u_int extra_bufs, u_int npipes, int *perr)
1714 struct netmap_mem_d *d = NULL;
1715 struct netmap_obj_params p[NETMAP_POOLS_NR];
1718 /* account for the fake host rings */
1722 /* copy the min values */
1723 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1724 p[i] = netmap_min_priv_params[i];
1727 /* possibly increase them to fit user request */
1728 v = sizeof(struct netmap_if) + sizeof(ssize_t) * (txr + rxr);
1729 if (p[NETMAP_IF_POOL].size < v)
1730 p[NETMAP_IF_POOL].size = v;
1732 if (p[NETMAP_IF_POOL].num < v)
1733 p[NETMAP_IF_POOL].num = v;
1734 maxd = (txd > rxd) ? txd : rxd;
1735 v = sizeof(struct netmap_ring) + sizeof(struct netmap_slot) * maxd;
1736 if (p[NETMAP_RING_POOL].size < v)
1737 p[NETMAP_RING_POOL].size = v;
1738 /* each pipe endpoint needs two tx rings (1 normal + 1 host, fake)
1739 * and two rx rings (again, 1 normal and 1 fake host)
1741 v = txr + rxr + 8 * npipes;
1742 if (p[NETMAP_RING_POOL].num < v)
1743 p[NETMAP_RING_POOL].num = v;
1744 /* for each pipe we only need the buffers for the 4 "real" rings.
1745 * On the other end, the pipe ring dimension may be different from
1746 * the parent port ring dimension. As a compromise, we allocate twice the
1747 * space actually needed if the pipe rings were the same size as the parent rings
1749 v = (4 * npipes + rxr) * rxd + (4 * npipes + txr) * txd + 2 + extra_bufs;
1750 /* the +2 is for the tx and rx fake buffers (indices 0 and 1) */
1751 if (p[NETMAP_BUF_POOL].num < v)
1752 p[NETMAP_BUF_POOL].num = v;
1755 nm_prinf("req if %d*%d ring %d*%d buf %d*%d",
1756 p[NETMAP_IF_POOL].num,
1757 p[NETMAP_IF_POOL].size,
1758 p[NETMAP_RING_POOL].num,
1759 p[NETMAP_RING_POOL].size,
1760 p[NETMAP_BUF_POOL].num,
1761 p[NETMAP_BUF_POOL].size);
1763 d = _netmap_mem_private_new(sizeof(*d), p, &netmap_mem_global_ops, perr);
1769 /* call with lock held */
1771 netmap_mem2_config(struct netmap_mem_d *nmd)
1775 if (!netmap_mem_params_changed(nmd->params))
1778 ND("reconfiguring");
1780 if (nmd->flags & NETMAP_MEM_FINALIZED) {
1781 /* reset previous allocation */
1782 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1783 netmap_reset_obj_allocator(&nmd->pools[i]);
1785 nmd->flags &= ~NETMAP_MEM_FINALIZED;
1788 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1789 nmd->lasterr = netmap_config_obj_allocator(&nmd->pools[i],
1790 nmd->params[i].num, nmd->params[i].size);
1797 return nmd->lasterr;
1801 netmap_mem2_finalize(struct netmap_mem_d *nmd)
1803 if (nmd->flags & NETMAP_MEM_FINALIZED)
1806 if (netmap_mem_finalize_all(nmd))
1812 return nmd->lasterr;
1816 netmap_mem2_delete(struct netmap_mem_d *nmd)
1820 for (i = 0; i < NETMAP_POOLS_NR; i++) {
1821 netmap_destroy_obj_allocator(&nmd->pools[i]);
1824 NMA_LOCK_DESTROY(nmd);
1830 /* doubly linekd list of all existing external allocators */
1831 static struct netmap_mem_ext *netmap_mem_ext_list = NULL;
1832 NM_MTX_T nm_mem_ext_list_lock;
1833 #endif /* WITH_EXTMEM */
1836 netmap_mem_init(void)
1838 NM_MTX_INIT(nm_mem_list_lock);
1839 NMA_LOCK_INIT(&nm_mem);
1840 netmap_mem_get(&nm_mem);
1842 NM_MTX_INIT(nm_mem_ext_list_lock);
1843 #endif /* WITH_EXTMEM */
1848 netmap_mem_fini(void)
1850 netmap_mem_put(&nm_mem);
1854 netmap_free_rings(struct netmap_adapter *na)
1860 for (i = 0; i < netmap_all_rings(na, t); i++) {
1861 struct netmap_kring *kring = NMR(na, t)[i];
1862 struct netmap_ring *ring = kring->ring;
1864 if (ring == NULL || kring->users > 0 || (kring->nr_kflags & NKR_NEEDRING)) {
1865 if (netmap_debug & NM_DEBUG_MEM)
1866 nm_prinf("NOT deleting ring %s (ring %p, users %d neekring %d)",
1867 kring->name, ring, kring->users, kring->nr_kflags & NKR_NEEDRING);
1870 if (netmap_debug & NM_DEBUG_MEM)
1871 nm_prinf("deleting ring %s", kring->name);
1872 if (!(kring->nr_kflags & NKR_FAKERING)) {
1873 ND("freeing bufs for %s", kring->name);
1874 netmap_free_bufs(na->nm_mem, ring->slot, kring->nkr_num_slots);
1876 ND("NOT freeing bufs for %s", kring->name);
1878 netmap_ring_free(na->nm_mem, ring);
1884 /* call with NMA_LOCK held *
1886 * Allocate netmap rings and buffers for this card
1887 * The rings are contiguous, but have variable size.
1888 * The kring array must follow the layout described
1889 * in netmap_krings_create().
1892 netmap_mem2_rings_create(struct netmap_adapter *na)
1899 for (i = 0; i < netmap_all_rings(na, t); i++) {
1900 struct netmap_kring *kring = NMR(na, t)[i];
1901 struct netmap_ring *ring = kring->ring;
1904 if (ring || (!kring->users && !(kring->nr_kflags & NKR_NEEDRING))) {
1905 /* uneeded, or already created by somebody else */
1906 if (netmap_debug & NM_DEBUG_MEM)
1907 nm_prinf("NOT creating ring %s (ring %p, users %d neekring %d)",
1908 kring->name, ring, kring->users, kring->nr_kflags & NKR_NEEDRING);
1911 if (netmap_debug & NM_DEBUG_MEM)
1912 nm_prinf("creating %s", kring->name);
1913 ndesc = kring->nkr_num_slots;
1914 len = sizeof(struct netmap_ring) +
1915 ndesc * sizeof(struct netmap_slot);
1916 ring = netmap_ring_malloc(na->nm_mem, len);
1918 nm_prerr("Cannot allocate %s_ring", nm_txrx2str(t));
1921 ND("txring at %p", ring);
1923 *(uint32_t *)(uintptr_t)&ring->num_slots = ndesc;
1924 *(int64_t *)(uintptr_t)&ring->buf_ofs =
1925 (na->nm_mem->pools[NETMAP_IF_POOL].memtotal +
1926 na->nm_mem->pools[NETMAP_RING_POOL].memtotal) -
1927 netmap_ring_offset(na->nm_mem, ring);
1929 /* copy values from kring */
1930 ring->head = kring->rhead;
1931 ring->cur = kring->rcur;
1932 ring->tail = kring->rtail;
1933 *(uint32_t *)(uintptr_t)&ring->nr_buf_size =
1934 netmap_mem_bufsize(na->nm_mem);
1935 ND("%s h %d c %d t %d", kring->name,
1936 ring->head, ring->cur, ring->tail);
1937 ND("initializing slots for %s_ring", nm_txrx2str(t));
1938 if (!(kring->nr_kflags & NKR_FAKERING)) {
1939 /* this is a real ring */
1940 if (netmap_debug & NM_DEBUG_MEM)
1941 nm_prinf("allocating buffers for %s", kring->name);
1942 if (netmap_new_bufs(na->nm_mem, ring->slot, ndesc)) {
1943 nm_prerr("Cannot allocate buffers for %s_ring", nm_txrx2str(t));
1947 /* this is a fake ring, set all indices to 0 */
1948 if (netmap_debug & NM_DEBUG_MEM)
1949 nm_prinf("NOT allocating buffers for %s", kring->name);
1950 netmap_mem_set_ring(na->nm_mem, ring->slot, ndesc, 0);
1953 *(uint16_t *)(uintptr_t)&ring->ringid = kring->ring_id;
1954 *(uint16_t *)(uintptr_t)&ring->dir = kring->tx;
1961 /* we cannot actually cleanup here, since we don't own kring->users
1962 * and kring->nr_klags & NKR_NEEDRING. The caller must decrement
1963 * the first or zero-out the second, then call netmap_free_rings()
1971 netmap_mem2_rings_delete(struct netmap_adapter *na)
1973 /* last instance, release bufs and rings */
1974 netmap_free_rings(na);
1978 /* call with NMA_LOCK held */
1980 * Allocate the per-fd structure netmap_if.
1982 * We assume that the configuration stored in na
1983 * (number of tx/rx rings and descs) does not change while
1984 * the interface is in netmap mode.
1986 static struct netmap_if *
1987 netmap_mem2_if_new(struct netmap_adapter *na, struct netmap_priv_d *priv)
1989 struct netmap_if *nifp;
1990 ssize_t base; /* handy for relative offsets between rings and nifp */
1991 u_int i, len, n[NR_TXRX], ntot;
1996 /* account for the (eventually fake) host rings */
1997 n[t] = netmap_all_rings(na, t);
2001 * the descriptor is followed inline by an array of offsets
2002 * to the tx and rx rings in the shared memory region.
2005 len = sizeof(struct netmap_if) + (ntot * sizeof(ssize_t));
2006 nifp = netmap_if_malloc(na->nm_mem, len);
2008 NMA_UNLOCK(na->nm_mem);
2012 /* initialize base fields -- override const */
2013 *(u_int *)(uintptr_t)&nifp->ni_tx_rings = na->num_tx_rings;
2014 *(u_int *)(uintptr_t)&nifp->ni_rx_rings = na->num_rx_rings;
2015 strlcpy(nifp->ni_name, na->name, sizeof(nifp->ni_name));
2018 * fill the slots for the rx and tx rings. They contain the offset
2019 * between the ring and nifp, so the information is usable in
2020 * userspace to reach the ring from the nifp.
2022 base = netmap_if_offset(na->nm_mem, nifp);
2023 for (i = 0; i < n[NR_TX]; i++) {
2024 /* XXX instead of ofs == 0 maybe use the offset of an error
2025 * ring, like we do for buffers? */
2028 if (na->tx_rings[i]->ring != NULL && i >= priv->np_qfirst[NR_TX]
2029 && i < priv->np_qlast[NR_TX]) {
2030 ofs = netmap_ring_offset(na->nm_mem,
2031 na->tx_rings[i]->ring) - base;
2033 *(ssize_t *)(uintptr_t)&nifp->ring_ofs[i] = ofs;
2035 for (i = 0; i < n[NR_RX]; i++) {
2036 /* XXX instead of ofs == 0 maybe use the offset of an error
2037 * ring, like we do for buffers? */
2040 if (na->rx_rings[i]->ring != NULL && i >= priv->np_qfirst[NR_RX]
2041 && i < priv->np_qlast[NR_RX]) {
2042 ofs = netmap_ring_offset(na->nm_mem,
2043 na->rx_rings[i]->ring) - base;
2045 *(ssize_t *)(uintptr_t)&nifp->ring_ofs[i+n[NR_TX]] = ofs;
2052 netmap_mem2_if_delete(struct netmap_adapter *na, struct netmap_if *nifp)
2057 if (nifp->ni_bufs_head)
2058 netmap_extra_free(na, nifp->ni_bufs_head);
2059 netmap_if_free(na->nm_mem, nifp);
2063 netmap_mem2_deref(struct netmap_mem_d *nmd)
2066 if (netmap_debug & NM_DEBUG_MEM)
2067 nm_prinf("active = %d", nmd->active);
2071 struct netmap_mem_ops netmap_mem_global_ops = {
2072 .nmd_get_lut = netmap_mem2_get_lut,
2073 .nmd_get_info = netmap_mem2_get_info,
2074 .nmd_ofstophys = netmap_mem2_ofstophys,
2075 .nmd_config = netmap_mem2_config,
2076 .nmd_finalize = netmap_mem2_finalize,
2077 .nmd_deref = netmap_mem2_deref,
2078 .nmd_delete = netmap_mem2_delete,
2079 .nmd_if_offset = netmap_mem2_if_offset,
2080 .nmd_if_new = netmap_mem2_if_new,
2081 .nmd_if_delete = netmap_mem2_if_delete,
2082 .nmd_rings_create = netmap_mem2_rings_create,
2083 .nmd_rings_delete = netmap_mem2_rings_delete
2087 netmap_mem_pools_info_get(struct nmreq_pools_info *req,
2088 struct netmap_mem_d *nmd)
2092 ret = netmap_mem_get_info(nmd, &req->nr_memsize, NULL,
2099 req->nr_if_pool_offset = 0;
2100 req->nr_if_pool_objtotal = nmd->pools[NETMAP_IF_POOL].objtotal;
2101 req->nr_if_pool_objsize = nmd->pools[NETMAP_IF_POOL]._objsize;
2103 req->nr_ring_pool_offset = nmd->pools[NETMAP_IF_POOL].memtotal;
2104 req->nr_ring_pool_objtotal = nmd->pools[NETMAP_RING_POOL].objtotal;
2105 req->nr_ring_pool_objsize = nmd->pools[NETMAP_RING_POOL]._objsize;
2107 req->nr_buf_pool_offset = nmd->pools[NETMAP_IF_POOL].memtotal +
2108 nmd->pools[NETMAP_RING_POOL].memtotal;
2109 req->nr_buf_pool_objtotal = nmd->pools[NETMAP_BUF_POOL].objtotal;
2110 req->nr_buf_pool_objsize = nmd->pools[NETMAP_BUF_POOL]._objsize;
2117 struct netmap_mem_ext {
2118 struct netmap_mem_d up;
2120 struct nm_os_extmem *os;
2121 struct netmap_mem_ext *next, *prev;
2124 /* call with nm_mem_list_lock held */
2126 netmap_mem_ext_register(struct netmap_mem_ext *e)
2128 NM_MTX_LOCK(nm_mem_ext_list_lock);
2129 if (netmap_mem_ext_list)
2130 netmap_mem_ext_list->prev = e;
2131 e->next = netmap_mem_ext_list;
2132 netmap_mem_ext_list = e;
2134 NM_MTX_UNLOCK(nm_mem_ext_list_lock);
2137 /* call with nm_mem_list_lock held */
2139 netmap_mem_ext_unregister(struct netmap_mem_ext *e)
2142 e->prev->next = e->next;
2144 netmap_mem_ext_list = e->next;
2146 e->next->prev = e->prev;
2147 e->prev = e->next = NULL;
2150 static struct netmap_mem_ext *
2151 netmap_mem_ext_search(struct nm_os_extmem *os)
2153 struct netmap_mem_ext *e;
2155 NM_MTX_LOCK(nm_mem_ext_list_lock);
2156 for (e = netmap_mem_ext_list; e; e = e->next) {
2157 if (nm_os_extmem_isequal(e->os, os)) {
2158 netmap_mem_get(&e->up);
2162 NM_MTX_UNLOCK(nm_mem_ext_list_lock);
2168 netmap_mem_ext_delete(struct netmap_mem_d *d)
2171 struct netmap_mem_ext *e =
2172 (struct netmap_mem_ext *)d;
2174 netmap_mem_ext_unregister(e);
2176 for (i = 0; i < NETMAP_POOLS_NR; i++) {
2177 struct netmap_obj_pool *p = &d->pools[i];
2180 nm_free_lut(p->lut, p->objtotal);
2185 nm_os_extmem_delete(e->os);
2186 netmap_mem2_delete(d);
2190 netmap_mem_ext_config(struct netmap_mem_d *nmd)
2195 struct netmap_mem_ops netmap_mem_ext_ops = {
2196 .nmd_get_lut = netmap_mem2_get_lut,
2197 .nmd_get_info = netmap_mem2_get_info,
2198 .nmd_ofstophys = netmap_mem2_ofstophys,
2199 .nmd_config = netmap_mem_ext_config,
2200 .nmd_finalize = netmap_mem2_finalize,
2201 .nmd_deref = netmap_mem2_deref,
2202 .nmd_delete = netmap_mem_ext_delete,
2203 .nmd_if_offset = netmap_mem2_if_offset,
2204 .nmd_if_new = netmap_mem2_if_new,
2205 .nmd_if_delete = netmap_mem2_if_delete,
2206 .nmd_rings_create = netmap_mem2_rings_create,
2207 .nmd_rings_delete = netmap_mem2_rings_delete
2210 struct netmap_mem_d *
2211 netmap_mem_ext_create(uint64_t usrptr, struct nmreq_pools_info *pi, int *perror)
2215 struct netmap_mem_ext *nme;
2218 struct nm_os_extmem *os = NULL;
2221 // XXX sanity checks
2222 if (pi->nr_if_pool_objtotal == 0)
2223 pi->nr_if_pool_objtotal = netmap_min_priv_params[NETMAP_IF_POOL].num;
2224 if (pi->nr_if_pool_objsize == 0)
2225 pi->nr_if_pool_objsize = netmap_min_priv_params[NETMAP_IF_POOL].size;
2226 if (pi->nr_ring_pool_objtotal == 0)
2227 pi->nr_ring_pool_objtotal = netmap_min_priv_params[NETMAP_RING_POOL].num;
2228 if (pi->nr_ring_pool_objsize == 0)
2229 pi->nr_ring_pool_objsize = netmap_min_priv_params[NETMAP_RING_POOL].size;
2230 if (pi->nr_buf_pool_objtotal == 0)
2231 pi->nr_buf_pool_objtotal = netmap_min_priv_params[NETMAP_BUF_POOL].num;
2232 if (pi->nr_buf_pool_objsize == 0)
2233 pi->nr_buf_pool_objsize = netmap_min_priv_params[NETMAP_BUF_POOL].size;
2234 if (netmap_verbose & NM_DEBUG_MEM)
2235 nm_prinf("if %d %d ring %d %d buf %d %d",
2236 pi->nr_if_pool_objtotal, pi->nr_if_pool_objsize,
2237 pi->nr_ring_pool_objtotal, pi->nr_ring_pool_objsize,
2238 pi->nr_buf_pool_objtotal, pi->nr_buf_pool_objsize);
2240 os = nm_os_extmem_create(usrptr, pi, &error);
2242 nm_prerr("os extmem creation failed");
2246 nme = netmap_mem_ext_search(os);
2248 nm_os_extmem_delete(os);
2251 if (netmap_verbose & NM_DEBUG_MEM)
2252 nm_prinf("not found, creating new");
2254 nme = _netmap_mem_private_new(sizeof(*nme),
2255 (struct netmap_obj_params[]){
2256 { pi->nr_if_pool_objsize, pi->nr_if_pool_objtotal },
2257 { pi->nr_ring_pool_objsize, pi->nr_ring_pool_objtotal },
2258 { pi->nr_buf_pool_objsize, pi->nr_buf_pool_objtotal }},
2259 &netmap_mem_ext_ops,
2264 nr_pages = nm_os_extmem_nr_pages(os);
2266 /* from now on pages will be released by nme destructor;
2267 * we let res = 0 to prevent release in out_unmap below
2270 os = NULL; /* pass ownership */
2272 clust = nm_os_extmem_nextpage(nme->os);
2274 for (i = 0; i < NETMAP_POOLS_NR; i++) {
2275 struct netmap_obj_pool *p = &nme->up.pools[i];
2276 struct netmap_obj_params *o = &nme->up.params[i];
2278 p->_objsize = o->size;
2279 p->_clustsize = o->size;
2280 p->_clustentries = 1;
2282 p->lut = nm_alloc_lut(o->num);
2283 if (p->lut == NULL) {
2288 p->bitmap_slots = (o->num + sizeof(uint32_t) - 1) / sizeof(uint32_t);
2289 p->invalid_bitmap = nm_os_malloc(sizeof(uint32_t) * p->bitmap_slots);
2290 if (p->invalid_bitmap == NULL) {
2295 if (nr_pages == 0) {
2302 for (j = 0; j < o->num && nr_pages > 0; j++) {
2305 p->lut[j].vaddr = clust + off;
2306 #if !defined(linux) && !defined(_WIN32)
2307 p->lut[j].paddr = vtophys(p->lut[j].vaddr);
2309 ND("%s %d at %p", p->name, j, p->lut[j].vaddr);
2310 noff = off + p->_objsize;
2311 if (noff < PAGE_SIZE) {
2315 ND("too big, recomputing offset...");
2316 while (noff >= PAGE_SIZE) {
2317 char *old_clust = clust;
2319 clust = nm_os_extmem_nextpage(nme->os);
2321 ND("noff %zu page %p nr_pages %d", noff,
2322 page_to_virt(*pages), nr_pages);
2323 if (noff > 0 && !nm_isset(p->invalid_bitmap, j) &&
2325 old_clust + PAGE_SIZE != clust))
2327 /* out of space or non contiguous,
2330 p->invalid_bitmap[ (j>>5) ] |= 1U << (j & 31U);
2331 ND("non contiguous at off %zu, drop", noff);
2339 p->numclusters = p->objtotal;
2340 p->memtotal = j * p->_objsize;
2341 ND("%d memtotal %u", j, p->memtotal);
2344 netmap_mem_ext_register(nme);
2349 netmap_mem_put(&nme->up);
2352 nm_os_extmem_delete(os);
2359 #endif /* WITH_EXTMEM */
2362 #ifdef WITH_PTNETMAP
2364 struct mem_pt_if *next;
2366 unsigned int nifp_offset;
2369 /* Netmap allocator for ptnetmap guests. */
2370 struct netmap_mem_ptg {
2371 struct netmap_mem_d up;
2373 vm_paddr_t nm_paddr; /* physical address in the guest */
2374 void *nm_addr; /* virtual address in the guest */
2375 struct netmap_lut buf_lut; /* lookup table for BUF pool in the guest */
2376 nm_memid_t host_mem_id; /* allocator identifier in the host */
2377 struct ptnetmap_memdev *ptn_dev;/* ptnetmap memdev */
2378 struct mem_pt_if *pt_ifs; /* list of interfaces in passthrough */
2381 /* Link a passthrough interface to a passthrough netmap allocator. */
2383 netmap_mem_pt_guest_ifp_add(struct netmap_mem_d *nmd, struct ifnet *ifp,
2384 unsigned int nifp_offset)
2386 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2387 struct mem_pt_if *ptif = nm_os_malloc(sizeof(*ptif));
2396 ptif->nifp_offset = nifp_offset;
2398 if (ptnmd->pt_ifs) {
2399 ptif->next = ptnmd->pt_ifs;
2401 ptnmd->pt_ifs = ptif;
2405 nm_prinf("ifp=%s,nifp_offset=%u",
2406 ptif->ifp->if_xname, ptif->nifp_offset);
2411 /* Called with NMA_LOCK(nmd) held. */
2412 static struct mem_pt_if *
2413 netmap_mem_pt_guest_ifp_lookup(struct netmap_mem_d *nmd, struct ifnet *ifp)
2415 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2416 struct mem_pt_if *curr;
2418 for (curr = ptnmd->pt_ifs; curr; curr = curr->next) {
2419 if (curr->ifp == ifp) {
2427 /* Unlink a passthrough interface from a passthrough netmap allocator. */
2429 netmap_mem_pt_guest_ifp_del(struct netmap_mem_d *nmd, struct ifnet *ifp)
2431 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2432 struct mem_pt_if *prev = NULL;
2433 struct mem_pt_if *curr;
2438 for (curr = ptnmd->pt_ifs; curr; curr = curr->next) {
2439 if (curr->ifp == ifp) {
2441 prev->next = curr->next;
2443 ptnmd->pt_ifs = curr->next;
2445 D("removed (ifp=%p,nifp_offset=%u)",
2446 curr->ifp, curr->nifp_offset);
2460 netmap_mem_pt_guest_get_lut(struct netmap_mem_d *nmd, struct netmap_lut *lut)
2462 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2464 if (!(nmd->flags & NETMAP_MEM_FINALIZED)) {
2468 *lut = ptnmd->buf_lut;
2473 netmap_mem_pt_guest_get_info(struct netmap_mem_d *nmd, uint64_t *size,
2474 u_int *memflags, uint16_t *id)
2478 error = nmd->ops->nmd_config(nmd);
2483 *size = nmd->nm_totalsize;
2485 *memflags = nmd->flags;
2495 netmap_mem_pt_guest_ofstophys(struct netmap_mem_d *nmd, vm_ooffset_t off)
2497 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2499 /* if the offset is valid, just return csb->base_addr + off */
2500 paddr = (vm_paddr_t)(ptnmd->nm_paddr + off);
2501 ND("off %lx padr %lx", off, (unsigned long)paddr);
2506 netmap_mem_pt_guest_config(struct netmap_mem_d *nmd)
2508 /* nothing to do, we are configured on creation
2509 * and configuration never changes thereafter
2515 netmap_mem_pt_guest_finalize(struct netmap_mem_d *nmd)
2517 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2527 if (nmd->flags & NETMAP_MEM_FINALIZED)
2530 if (ptnmd->ptn_dev == NULL) {
2531 D("ptnetmap memdev not attached");
2535 /* Map memory through ptnetmap-memdev BAR. */
2536 error = nm_os_pt_memdev_iomap(ptnmd->ptn_dev, &ptnmd->nm_paddr,
2537 &ptnmd->nm_addr, &mem_size);
2541 /* Initialize the lut using the information contained in the
2542 * ptnetmap memory device. */
2543 bufsize = nm_os_pt_memdev_ioread(ptnmd->ptn_dev,
2544 PTNET_MDEV_IO_BUF_POOL_OBJSZ);
2545 nbuffers = nm_os_pt_memdev_ioread(ptnmd->ptn_dev,
2546 PTNET_MDEV_IO_BUF_POOL_OBJNUM);
2548 /* allocate the lut */
2549 if (ptnmd->buf_lut.lut == NULL) {
2550 D("allocating lut");
2551 ptnmd->buf_lut.lut = nm_alloc_lut(nbuffers);
2552 if (ptnmd->buf_lut.lut == NULL) {
2553 D("lut allocation failed");
2558 /* we have physically contiguous memory mapped through PCI BAR */
2559 poolofs = nm_os_pt_memdev_ioread(ptnmd->ptn_dev,
2560 PTNET_MDEV_IO_BUF_POOL_OFS);
2561 vaddr = (char *)(ptnmd->nm_addr) + poolofs;
2562 paddr = ptnmd->nm_paddr + poolofs;
2564 for (i = 0; i < nbuffers; i++) {
2565 ptnmd->buf_lut.lut[i].vaddr = vaddr;
2570 ptnmd->buf_lut.objtotal = nbuffers;
2571 ptnmd->buf_lut.objsize = bufsize;
2572 nmd->nm_totalsize = (unsigned int)mem_size;
2574 /* Initialize these fields as are needed by
2575 * netmap_mem_bufsize().
2576 * XXX please improve this, why do we need this
2577 * replication? maybe we nmd->pools[] should no be
2578 * there for the guest allocator? */
2579 nmd->pools[NETMAP_BUF_POOL]._objsize = bufsize;
2580 nmd->pools[NETMAP_BUF_POOL]._objtotal = nbuffers;
2582 nmd->flags |= NETMAP_MEM_FINALIZED;
2588 netmap_mem_pt_guest_deref(struct netmap_mem_d *nmd)
2590 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2592 if (nmd->active == 1 &&
2593 (nmd->flags & NETMAP_MEM_FINALIZED)) {
2594 nmd->flags &= ~NETMAP_MEM_FINALIZED;
2595 /* unmap ptnetmap-memdev memory */
2596 if (ptnmd->ptn_dev) {
2597 nm_os_pt_memdev_iounmap(ptnmd->ptn_dev);
2599 ptnmd->nm_addr = NULL;
2600 ptnmd->nm_paddr = 0;
2605 netmap_mem_pt_guest_if_offset(struct netmap_mem_d *nmd, const void *vaddr)
2607 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)nmd;
2609 return (const char *)(vaddr) - (char *)(ptnmd->nm_addr);
2613 netmap_mem_pt_guest_delete(struct netmap_mem_d *nmd)
2618 D("deleting %p", nmd);
2619 if (nmd->active > 0)
2620 D("bug: deleting mem allocator with active=%d!", nmd->active);
2622 D("done deleting %p", nmd);
2623 NMA_LOCK_DESTROY(nmd);
2627 static struct netmap_if *
2628 netmap_mem_pt_guest_if_new(struct netmap_adapter *na, struct netmap_priv_d *priv)
2630 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)na->nm_mem;
2631 struct mem_pt_if *ptif;
2632 struct netmap_if *nifp = NULL;
2634 ptif = netmap_mem_pt_guest_ifp_lookup(na->nm_mem, na->ifp);
2636 D("Error: interface %p is not in passthrough", na->ifp);
2640 nifp = (struct netmap_if *)((char *)(ptnmd->nm_addr) +
2647 netmap_mem_pt_guest_if_delete(struct netmap_adapter *na, struct netmap_if *nifp)
2649 struct mem_pt_if *ptif;
2651 ptif = netmap_mem_pt_guest_ifp_lookup(na->nm_mem, na->ifp);
2653 D("Error: interface %p is not in passthrough", na->ifp);
2658 netmap_mem_pt_guest_rings_create(struct netmap_adapter *na)
2660 struct netmap_mem_ptg *ptnmd = (struct netmap_mem_ptg *)na->nm_mem;
2661 struct mem_pt_if *ptif;
2662 struct netmap_if *nifp;
2665 ptif = netmap_mem_pt_guest_ifp_lookup(na->nm_mem, na->ifp);
2667 D("Error: interface %p is not in passthrough", na->ifp);
2672 /* point each kring to the corresponding backend ring */
2673 nifp = (struct netmap_if *)((char *)ptnmd->nm_addr + ptif->nifp_offset);
2674 for (i = 0; i < netmap_all_rings(na, NR_TX); i++) {
2675 struct netmap_kring *kring = na->tx_rings[i];
2678 kring->ring = (struct netmap_ring *)
2679 ((char *)nifp + nifp->ring_ofs[i]);
2681 for (i = 0; i < netmap_all_rings(na, NR_RX); i++) {
2682 struct netmap_kring *kring = na->rx_rings[i];
2685 kring->ring = (struct netmap_ring *)
2687 nifp->ring_ofs[netmap_all_rings(na, NR_TX) + i]);
2696 netmap_mem_pt_guest_rings_delete(struct netmap_adapter *na)
2703 for (i = 0; i < nma_get_nrings(na, t) + 1; i++) {
2704 struct netmap_kring *kring = &NMR(na, t)[i];
2712 static struct netmap_mem_ops netmap_mem_pt_guest_ops = {
2713 .nmd_get_lut = netmap_mem_pt_guest_get_lut,
2714 .nmd_get_info = netmap_mem_pt_guest_get_info,
2715 .nmd_ofstophys = netmap_mem_pt_guest_ofstophys,
2716 .nmd_config = netmap_mem_pt_guest_config,
2717 .nmd_finalize = netmap_mem_pt_guest_finalize,
2718 .nmd_deref = netmap_mem_pt_guest_deref,
2719 .nmd_if_offset = netmap_mem_pt_guest_if_offset,
2720 .nmd_delete = netmap_mem_pt_guest_delete,
2721 .nmd_if_new = netmap_mem_pt_guest_if_new,
2722 .nmd_if_delete = netmap_mem_pt_guest_if_delete,
2723 .nmd_rings_create = netmap_mem_pt_guest_rings_create,
2724 .nmd_rings_delete = netmap_mem_pt_guest_rings_delete
2727 /* Called with nm_mem_list_lock held. */
2728 static struct netmap_mem_d *
2729 netmap_mem_pt_guest_find_memid(nm_memid_t mem_id)
2731 struct netmap_mem_d *mem = NULL;
2732 struct netmap_mem_d *scan = netmap_last_mem_d;
2735 /* find ptnetmap allocator through host ID */
2736 if (scan->ops->nmd_deref == netmap_mem_pt_guest_deref &&
2737 ((struct netmap_mem_ptg *)(scan))->host_mem_id == mem_id) {
2740 NM_DBG_REFC(mem, __FUNCTION__, __LINE__);
2744 } while (scan != netmap_last_mem_d);
2749 /* Called with nm_mem_list_lock held. */
2750 static struct netmap_mem_d *
2751 netmap_mem_pt_guest_create(nm_memid_t mem_id)
2753 struct netmap_mem_ptg *ptnmd;
2756 ptnmd = nm_os_malloc(sizeof(struct netmap_mem_ptg));
2757 if (ptnmd == NULL) {
2762 ptnmd->up.ops = &netmap_mem_pt_guest_ops;
2763 ptnmd->host_mem_id = mem_id;
2764 ptnmd->pt_ifs = NULL;
2766 /* Assign new id in the guest (We have the lock) */
2767 err = nm_mem_assign_id_locked(&ptnmd->up);
2771 ptnmd->up.flags &= ~NETMAP_MEM_FINALIZED;
2772 ptnmd->up.flags |= NETMAP_MEM_IO;
2774 NMA_LOCK_INIT(&ptnmd->up);
2776 snprintf(ptnmd->up.name, NM_MEM_NAMESZ, "%d", ptnmd->up.nm_id);
2781 netmap_mem_pt_guest_delete(&ptnmd->up);
2786 * find host id in guest allocators and create guest allocator
2787 * if it is not there
2789 static struct netmap_mem_d *
2790 netmap_mem_pt_guest_get(nm_memid_t mem_id)
2792 struct netmap_mem_d *nmd;
2794 NM_MTX_LOCK(nm_mem_list_lock);
2795 nmd = netmap_mem_pt_guest_find_memid(mem_id);
2797 nmd = netmap_mem_pt_guest_create(mem_id);
2799 NM_MTX_UNLOCK(nm_mem_list_lock);
2805 * The guest allocator can be created by ptnetmap_memdev (during the device
2806 * attach) or by ptnetmap device (ptnet), during the netmap_attach.
2808 * The order is not important (we have different order in LINUX and FreeBSD).
2809 * The first one, creates the device, and the second one simply attaches it.
2812 /* Called when ptnetmap_memdev is attaching, to attach a new allocator in
2814 struct netmap_mem_d *
2815 netmap_mem_pt_guest_attach(struct ptnetmap_memdev *ptn_dev, nm_memid_t mem_id)
2817 struct netmap_mem_d *nmd;
2818 struct netmap_mem_ptg *ptnmd;
2820 nmd = netmap_mem_pt_guest_get(mem_id);
2822 /* assign this device to the guest allocator */
2824 ptnmd = (struct netmap_mem_ptg *)nmd;
2825 ptnmd->ptn_dev = ptn_dev;
2831 /* Called when ptnet device is attaching */
2832 struct netmap_mem_d *
2833 netmap_mem_pt_guest_new(struct ifnet *ifp,
2834 unsigned int nifp_offset,
2837 struct netmap_mem_d *nmd;
2843 nmd = netmap_mem_pt_guest_get((nm_memid_t)memid);
2846 netmap_mem_pt_guest_ifp_add(nmd, ifp, nifp_offset);
2852 #endif /* WITH_PTNETMAP */