+++ /dev/null
-/*-
- * BSD LICENSE
- *
- * Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * * Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- * * Neither the name of Intel Corporation nor the names of its
- * contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifdef RTE_LIBRTE_IVSHMEM /* hide it from coverage */
-
-#include <stdint.h>
-#include <unistd.h>
-#include <inttypes.h>
-#include <sys/mman.h>
-#include <sys/file.h>
-#include <string.h>
-#include <sys/queue.h>
-
-#include <rte_log.h>
-#include <rte_pci.h>
-#include <rte_memory.h>
-#include <rte_eal.h>
-#include <rte_eal_memconfig.h>
-#include <rte_string_fns.h>
-#include <rte_errno.h>
-#include <rte_ring.h>
-#include <rte_malloc.h>
-#include <rte_common.h>
-#include <rte_ivshmem.h>
-
-#include "eal_internal_cfg.h"
-#include "eal_private.h"
-
-#define PCI_VENDOR_ID_IVSHMEM 0x1Af4
-#define PCI_DEVICE_ID_IVSHMEM 0x1110
-
-#define IVSHMEM_MAGIC 0x0BADC0DE
-
-#define IVSHMEM_RESOURCE_PATH "/sys/bus/pci/devices/%04x:%02x:%02x.%x/resource2"
-#define IVSHMEM_CONFIG_PATH "/var/run/.%s_ivshmem_config"
-
-#define PHYS 0x1
-#define VIRT 0x2
-#define IOREMAP 0x4
-#define FULL (PHYS|VIRT|IOREMAP)
-
-#define METADATA_SIZE_ALIGNED \
- (RTE_ALIGN_CEIL(sizeof(struct rte_ivshmem_metadata),pagesz))
-
-#define CONTAINS(x,y)\
- (((y).addr_64 >= (x).addr_64) && ((y).addr_64 < (x).addr_64 + (x).len))
-
-#define DIM(x) (sizeof(x)/sizeof(x[0]))
-
-struct ivshmem_pci_device {
- char path[PATH_MAX];
- phys_addr_t ioremap_addr;
-};
-
-/* data type to store in config */
-struct ivshmem_segment {
- struct rte_ivshmem_metadata_entry entry;
- uint64_t align;
- char path[PATH_MAX];
-};
-struct ivshmem_shared_config {
- struct ivshmem_segment segment[RTE_MAX_MEMSEG];
- uint32_t segment_idx;
- struct ivshmem_pci_device pci_devs[RTE_LIBRTE_IVSHMEM_MAX_PCI_DEVS];
- uint32_t pci_devs_idx;
-};
-static struct ivshmem_shared_config * ivshmem_config;
-static int memseg_idx;
-static int pagesz;
-
-/* Tailq heads to add rings to */
-TAILQ_HEAD(rte_ring_list, rte_tailq_entry);
-
-/*
- * Utility functions
- */
-
-static int
-is_ivshmem_device(struct rte_pci_device * dev)
-{
- return dev->id.vendor_id == PCI_VENDOR_ID_IVSHMEM
- && dev->id.device_id == PCI_DEVICE_ID_IVSHMEM;
-}
-
-static void *
-map_metadata(int fd, uint64_t len)
-{
- size_t metadata_len = sizeof(struct rte_ivshmem_metadata);
- size_t aligned_len = METADATA_SIZE_ALIGNED;
-
- return mmap(NULL, metadata_len, PROT_READ | PROT_WRITE,
- MAP_SHARED, fd, len - aligned_len);
-}
-
-static void
-unmap_metadata(void * ptr)
-{
- munmap(ptr, sizeof(struct rte_ivshmem_metadata));
-}
-
-static int
-has_ivshmem_metadata(int fd, uint64_t len)
-{
- struct rte_ivshmem_metadata metadata;
- void * ptr;
-
- ptr = map_metadata(fd, len);
-
- if (ptr == MAP_FAILED)
- return -1;
-
- metadata = *(struct rte_ivshmem_metadata*) (ptr);
-
- unmap_metadata(ptr);
-
- return metadata.magic_number == IVSHMEM_MAGIC;
-}
-
-static void
-remove_segment(struct ivshmem_segment * ms, int len, int idx)
-{
- int i;
-
- for (i = idx; i < len - 1; i++)
- memcpy(&ms[i], &ms[i+1], sizeof(struct ivshmem_segment));
- memset(&ms[len-1], 0, sizeof(struct ivshmem_segment));
-}
-
-static int
-overlap(const struct rte_memzone * mz1, const struct rte_memzone * mz2)
-{
- uint64_t start1, end1, start2, end2;
- uint64_t p_start1, p_end1, p_start2, p_end2;
- uint64_t i_start1, i_end1, i_start2, i_end2;
- int result = 0;
-
- /* gather virtual addresses */
- start1 = mz1->addr_64;
- end1 = mz1->addr_64 + mz1->len;
- start2 = mz2->addr_64;
- end2 = mz2->addr_64 + mz2->len;
-
- /* gather physical addresses */
- p_start1 = mz1->phys_addr;
- p_end1 = mz1->phys_addr + mz1->len;
- p_start2 = mz2->phys_addr;
- p_end2 = mz2->phys_addr + mz2->len;
-
- /* gather ioremap addresses */
- i_start1 = mz1->ioremap_addr;
- i_end1 = mz1->ioremap_addr + mz1->len;
- i_start2 = mz2->ioremap_addr;
- i_end2 = mz2->ioremap_addr + mz2->len;
-
- /* check for overlap in virtual addresses */
- if (start1 >= start2 && start1 < end2)
- result |= VIRT;
- if (start2 >= start1 && start2 < end1)
- result |= VIRT;
-
- /* check for overlap in physical addresses */
- if (p_start1 >= p_start2 && p_start1 < p_end2)
- result |= PHYS;
- if (p_start2 >= p_start1 && p_start2 < p_end1)
- result |= PHYS;
-
- /* check for overlap in ioremap addresses */
- if (i_start1 >= i_start2 && i_start1 < i_end2)
- result |= IOREMAP;
- if (i_start2 >= i_start1 && i_start2 < i_end1)
- result |= IOREMAP;
-
- return result;
-}
-
-static int
-adjacent(const struct rte_memzone * mz1, const struct rte_memzone * mz2)
-{
- uint64_t start1, end1, start2, end2;
- uint64_t p_start1, p_end1, p_start2, p_end2;
- uint64_t i_start1, i_end1, i_start2, i_end2;
- int result = 0;
-
- /* gather virtual addresses */
- start1 = mz1->addr_64;
- end1 = mz1->addr_64 + mz1->len;
- start2 = mz2->addr_64;
- end2 = mz2->addr_64 + mz2->len;
-
- /* gather physical addresses */
- p_start1 = mz1->phys_addr;
- p_end1 = mz1->phys_addr + mz1->len;
- p_start2 = mz2->phys_addr;
- p_end2 = mz2->phys_addr + mz2->len;
-
- /* gather ioremap addresses */
- i_start1 = mz1->ioremap_addr;
- i_end1 = mz1->ioremap_addr + mz1->len;
- i_start2 = mz2->ioremap_addr;
- i_end2 = mz2->ioremap_addr + mz2->len;
-
- /* check if segments are virtually adjacent */
- if (start1 == end2)
- result |= VIRT;
- if (start2 == end1)
- result |= VIRT;
-
- /* check if segments are physically adjacent */
- if (p_start1 == p_end2)
- result |= PHYS;
- if (p_start2 == p_end1)
- result |= PHYS;
-
- /* check if segments are ioremap-adjacent */
- if (i_start1 == i_end2)
- result |= IOREMAP;
- if (i_start2 == i_end1)
- result |= IOREMAP;
-
- return result;
-}
-
-static int
-has_adjacent_segments(struct ivshmem_segment * ms, int len)
-{
- int i, j;
-
- for (i = 0; i < len; i++)
- for (j = i + 1; j < len; j++) {
- /* we're only interested in fully adjacent segments; partially
- * adjacent segments can coexist.
- */
- if (adjacent(&ms[i].entry.mz, &ms[j].entry.mz) == FULL)
- return 1;
- }
- return 0;
-}
-
-static int
-has_overlapping_segments(struct ivshmem_segment * ms, int len)
-{
- int i, j;
-
- for (i = 0; i < len; i++)
- for (j = i + 1; j < len; j++)
- if (overlap(&ms[i].entry.mz, &ms[j].entry.mz))
- return 1;
- return 0;
-}
-
-static int
-seg_compare(const void * a, const void * b)
-{
- const struct ivshmem_segment * s1 = (const struct ivshmem_segment*) a;
- const struct ivshmem_segment * s2 = (const struct ivshmem_segment*) b;
-
- /* move unallocated zones to the end */
- if (s1->entry.mz.addr == NULL && s2->entry.mz.addr == NULL)
- return 0;
- if (s1->entry.mz.addr == 0)
- return 1;
- if (s2->entry.mz.addr == 0)
- return -1;
-
- return s1->entry.mz.phys_addr > s2->entry.mz.phys_addr;
-}
-
-#ifdef RTE_LIBRTE_IVSHMEM_DEBUG
-static void
-entry_dump(struct rte_ivshmem_metadata_entry *e)
-{
- RTE_LOG(DEBUG, EAL, "\tvirt: %p-%p\n", e->mz.addr,
- RTE_PTR_ADD(e->mz.addr, e->mz.len));
- RTE_LOG(DEBUG, EAL, "\tphys: 0x%" PRIx64 "-0x%" PRIx64 "\n",
- e->mz.phys_addr,
- e->mz.phys_addr + e->mz.len);
- RTE_LOG(DEBUG, EAL, "\tio: 0x%" PRIx64 "-0x%" PRIx64 "\n",
- e->mz.ioremap_addr,
- e->mz.ioremap_addr + e->mz.len);
- RTE_LOG(DEBUG, EAL, "\tlen: 0x%" PRIx64 "\n", e->mz.len);
- RTE_LOG(DEBUG, EAL, "\toff: 0x%" PRIx64 "\n", e->offset);
-}
-#endif
-
-
-
-/*
- * Actual useful code
- */
-
-/* read through metadata mapped from the IVSHMEM device */
-static int
-read_metadata(char * path, int path_len, int fd, uint64_t flen)
-{
- struct rte_ivshmem_metadata metadata;
- struct rte_ivshmem_metadata_entry * entry;
- int idx, i;
- void * ptr;
-
- ptr = map_metadata(fd, flen);
-
- if (ptr == MAP_FAILED)
- return -1;
-
- metadata = *(struct rte_ivshmem_metadata*) (ptr);
-
- unmap_metadata(ptr);
-
- RTE_LOG(DEBUG, EAL, "Parsing metadata for \"%s\"\n", metadata.name);
-
- idx = ivshmem_config->segment_idx;
-
- for (i = 0; i < RTE_LIBRTE_IVSHMEM_MAX_ENTRIES &&
- idx <= RTE_MAX_MEMSEG; i++) {
-
- if (idx == RTE_MAX_MEMSEG) {
- RTE_LOG(ERR, EAL, "Not enough memory segments!\n");
- return -1;
- }
-
- entry = &metadata.entry[i];
-
- /* stop on uninitialized memzone */
- if (entry->mz.len == 0)
- break;
-
- /* copy metadata entry */
- memcpy(&ivshmem_config->segment[idx].entry, entry,
- sizeof(struct rte_ivshmem_metadata_entry));
-
- /* copy path */
- snprintf(ivshmem_config->segment[idx].path, path_len, "%s", path);
-
- idx++;
- }
- ivshmem_config->segment_idx = idx;
-
- return 0;
-}
-
-/* check through each segment and look for adjacent or overlapping ones. */
-static int
-cleanup_segments(struct ivshmem_segment * ms, int tbl_len)
-{
- struct ivshmem_segment * s, * tmp;
- int i, j, concat, seg_adjacent, seg_overlapping;
- uint64_t start1, start2, end1, end2, p_start1, p_start2, i_start1, i_start2;
-
- qsort(ms, tbl_len, sizeof(struct ivshmem_segment),
- seg_compare);
-
- while (has_overlapping_segments(ms, tbl_len) ||
- has_adjacent_segments(ms, tbl_len)) {
-
- for (i = 0; i < tbl_len; i++) {
- s = &ms[i];
-
- concat = 0;
-
- for (j = i + 1; j < tbl_len; j++) {
- tmp = &ms[j];
-
- /* check if this segment is overlapping with existing segment,
- * or is adjacent to existing segment */
- seg_overlapping = overlap(&s->entry.mz, &tmp->entry.mz);
- seg_adjacent = adjacent(&s->entry.mz, &tmp->entry.mz);
-
- /* check if segments fully overlap or are fully adjacent */
- if ((seg_adjacent == FULL) || (seg_overlapping == FULL)) {
-
-#ifdef RTE_LIBRTE_IVSHMEM_DEBUG
- RTE_LOG(DEBUG, EAL, "Concatenating segments\n");
- RTE_LOG(DEBUG, EAL, "Segment %i:\n", i);
- entry_dump(&s->entry);
- RTE_LOG(DEBUG, EAL, "Segment %i:\n", j);
- entry_dump(&tmp->entry);
-#endif
-
- start1 = s->entry.mz.addr_64;
- start2 = tmp->entry.mz.addr_64;
- p_start1 = s->entry.mz.phys_addr;
- p_start2 = tmp->entry.mz.phys_addr;
- i_start1 = s->entry.mz.ioremap_addr;
- i_start2 = tmp->entry.mz.ioremap_addr;
- end1 = s->entry.mz.addr_64 + s->entry.mz.len;
- end2 = tmp->entry.mz.addr_64 + tmp->entry.mz.len;
-
- /* settle for minimum start address and maximum length */
- s->entry.mz.addr_64 = RTE_MIN(start1, start2);
- s->entry.mz.phys_addr = RTE_MIN(p_start1, p_start2);
- s->entry.mz.ioremap_addr = RTE_MIN(i_start1, i_start2);
- s->entry.offset = RTE_MIN(s->entry.offset, tmp->entry.offset);
- s->entry.mz.len = RTE_MAX(end1, end2) - s->entry.mz.addr_64;
- concat = 1;
-
-#ifdef RTE_LIBRTE_IVSHMEM_DEBUG
- RTE_LOG(DEBUG, EAL, "Resulting segment:\n");
- entry_dump(&s->entry);
-
-#endif
- }
- /* if segments not fully overlap, we have an error condition.
- * adjacent segments can coexist.
- */
- else if (seg_overlapping > 0) {
- RTE_LOG(ERR, EAL, "Segments %i and %i overlap!\n", i, j);
-#ifdef RTE_LIBRTE_IVSHMEM_DEBUG
- RTE_LOG(DEBUG, EAL, "Segment %i:\n", i);
- entry_dump(&s->entry);
- RTE_LOG(DEBUG, EAL, "Segment %i:\n", j);
- entry_dump(&tmp->entry);
-#endif
- return -1;
- }
- if (concat)
- break;
- }
- /* if we concatenated, remove segment at j */
- if (concat) {
- remove_segment(ms, tbl_len, j);
- tbl_len--;
- break;
- }
- }
- }
-
- return tbl_len;
-}
-
-static int
-create_shared_config(void)
-{
- char path[PATH_MAX];
- int fd;
-
- /* build ivshmem config file path */
- snprintf(path, sizeof(path), IVSHMEM_CONFIG_PATH,
- internal_config.hugefile_prefix);
-
- fd = open(path, O_CREAT | O_RDWR, 0600);
-
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "Could not open %s: %s\n", path, strerror(errno));
- return -1;
- }
-
- /* try ex-locking first - if the file is locked, we have a problem */
- if (flock(fd, LOCK_EX | LOCK_NB) == -1) {
- RTE_LOG(ERR, EAL, "Locking %s failed: %s\n", path, strerror(errno));
- close(fd);
- return -1;
- }
-
- if (ftruncate(fd, sizeof(struct ivshmem_shared_config)) < 0) {
- RTE_LOG(ERR, EAL, "ftruncate failed: %s\n", strerror(errno));
- return -1;
- }
-
- ivshmem_config = mmap(NULL, sizeof(struct ivshmem_shared_config),
- PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
-
- if (ivshmem_config == MAP_FAILED)
- return -1;
-
- memset(ivshmem_config, 0, sizeof(struct ivshmem_shared_config));
-
- /* change the exclusive lock we got earlier to a shared lock */
- if (flock(fd, LOCK_SH | LOCK_NB) == -1) {
- RTE_LOG(ERR, EAL, "Locking %s failed: %s \n", path, strerror(errno));
- return -1;
- }
-
- close(fd);
-
- return 0;
-}
-
-/* open shared config file and, if present, map the config.
- * having no config file is not an error condition, as we later check if
- * ivshmem_config is NULL (if it is, that means nothing was mapped). */
-static int
-open_shared_config(void)
-{
- char path[PATH_MAX];
- int fd;
-
- /* build ivshmem config file path */
- snprintf(path, sizeof(path), IVSHMEM_CONFIG_PATH,
- internal_config.hugefile_prefix);
-
- fd = open(path, O_RDONLY);
-
- /* if the file doesn't exist, just return success */
- if (fd < 0 && errno == ENOENT)
- return 0;
- /* else we have an error condition */
- else if (fd < 0) {
- RTE_LOG(ERR, EAL, "Could not open %s: %s\n",
- path, strerror(errno));
- return -1;
- }
-
- /* try ex-locking first - if the lock *does* succeed, this means it's a
- * stray config file, so it should be deleted.
- */
- if (flock(fd, LOCK_EX | LOCK_NB) != -1) {
-
- /* if we can't remove the file, something is wrong */
- if (unlink(path) < 0) {
- RTE_LOG(ERR, EAL, "Could not remove %s: %s\n", path,
- strerror(errno));
- return -1;
- }
-
- /* release the lock */
- flock(fd, LOCK_UN);
- close(fd);
-
- /* return success as having a stray config file is equivalent to not
- * having config file at all.
- */
- return 0;
- }
-
- ivshmem_config = mmap(NULL, sizeof(struct ivshmem_shared_config),
- PROT_READ, MAP_SHARED, fd, 0);
-
- if (ivshmem_config == MAP_FAILED)
- return -1;
-
- /* place a shared lock on config file */
- if (flock(fd, LOCK_SH | LOCK_NB) == -1) {
- RTE_LOG(ERR, EAL, "Locking %s failed: %s \n", path, strerror(errno));
- return -1;
- }
-
- close(fd);
-
- return 0;
-}
-
-/*
- * This function does the following:
- *
- * 1) Builds a table of ivshmem_segments with proper offset alignment
- * 2) Cleans up that table so that we don't have any overlapping or adjacent
- * memory segments
- * 3) Creates memsegs from this table and maps them into memory.
- */
-static inline int
-map_all_segments(void)
-{
- struct ivshmem_segment ms_tbl[RTE_MAX_MEMSEG];
- struct ivshmem_pci_device * pci_dev;
- struct rte_mem_config * mcfg;
- struct ivshmem_segment * seg;
- int fd, fd_zero;
- unsigned i, j;
- struct rte_memzone mz;
- struct rte_memseg ms;
- void * base_addr;
- uint64_t align, len;
- phys_addr_t ioremap_addr;
-
- ioremap_addr = 0;
-
- memset(ms_tbl, 0, sizeof(ms_tbl));
- memset(&mz, 0, sizeof(struct rte_memzone));
- memset(&ms, 0, sizeof(struct rte_memseg));
-
- /* first, build a table of memsegs to map, to avoid failed mmaps due to
- * overlaps
- */
- for (i = 0; i < ivshmem_config->segment_idx && i <= RTE_MAX_MEMSEG; i++) {
- if (i == RTE_MAX_MEMSEG) {
- RTE_LOG(ERR, EAL, "Too many segments requested!\n");
- return -1;
- }
-
- seg = &ivshmem_config->segment[i];
-
- /* copy segment to table */
- memcpy(&ms_tbl[i], seg, sizeof(struct ivshmem_segment));
-
- /* find ioremap addr */
- for (j = 0; j < DIM(ivshmem_config->pci_devs); j++) {
- pci_dev = &ivshmem_config->pci_devs[j];
- if (!strncmp(pci_dev->path, seg->path, sizeof(pci_dev->path))) {
- ioremap_addr = pci_dev->ioremap_addr;
- break;
- }
- }
- if (ioremap_addr == 0) {
- RTE_LOG(ERR, EAL, "Cannot find ioremap addr!\n");
- return -1;
- }
-
- /* work out alignments */
- align = seg->entry.mz.addr_64 -
- RTE_ALIGN_FLOOR(seg->entry.mz.addr_64, 0x1000);
- len = RTE_ALIGN_CEIL(seg->entry.mz.len + align, 0x1000);
-
- /* save original alignments */
- ms_tbl[i].align = align;
-
- /* create a memory zone */
- mz.addr_64 = seg->entry.mz.addr_64 - align;
- mz.len = len;
- mz.hugepage_sz = seg->entry.mz.hugepage_sz;
- mz.phys_addr = seg->entry.mz.phys_addr - align;
-
- /* find true physical address */
- mz.ioremap_addr = ioremap_addr + seg->entry.offset - align;
-
- ms_tbl[i].entry.offset = seg->entry.offset - align;
-
- memcpy(&ms_tbl[i].entry.mz, &mz, sizeof(struct rte_memzone));
- }
-
- /* clean up the segments */
- memseg_idx = cleanup_segments(ms_tbl, ivshmem_config->segment_idx);
-
- if (memseg_idx < 0)
- return -1;
-
- mcfg = rte_eal_get_configuration()->mem_config;
-
- fd_zero = open("/dev/zero", O_RDWR);
-
- if (fd_zero < 0) {
- RTE_LOG(ERR, EAL, "Cannot open /dev/zero: %s\n", strerror(errno));
- return -1;
- }
-
- /* create memsegs and put them into DPDK memory */
- for (i = 0; i < (unsigned) memseg_idx; i++) {
-
- seg = &ms_tbl[i];
-
- ms.addr_64 = seg->entry.mz.addr_64;
- ms.hugepage_sz = seg->entry.mz.hugepage_sz;
- ms.len = seg->entry.mz.len;
- ms.nchannel = rte_memory_get_nchannel();
- ms.nrank = rte_memory_get_nrank();
- ms.phys_addr = seg->entry.mz.phys_addr;
- ms.ioremap_addr = seg->entry.mz.ioremap_addr;
- ms.socket_id = seg->entry.mz.socket_id;
-
- base_addr = mmap(ms.addr, ms.len,
- PROT_READ | PROT_WRITE, MAP_PRIVATE, fd_zero, 0);
-
- if (base_addr == MAP_FAILED || base_addr != ms.addr) {
- RTE_LOG(ERR, EAL, "Cannot map /dev/zero!\n");
- return -1;
- }
-
- fd = open(seg->path, O_RDWR);
-
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "Cannot open %s: %s\n", seg->path,
- strerror(errno));
- return -1;
- }
-
- munmap(ms.addr, ms.len);
-
- base_addr = mmap(ms.addr, ms.len,
- PROT_READ | PROT_WRITE, MAP_SHARED, fd,
- seg->entry.offset);
-
-
- if (base_addr == MAP_FAILED || base_addr != ms.addr) {
- RTE_LOG(ERR, EAL, "Cannot map segment into memory: "
- "expected %p got %p (%s)\n", ms.addr, base_addr,
- strerror(errno));
- return -1;
- }
-
- RTE_LOG(DEBUG, EAL, "Memory segment mapped: %p (len %" PRIx64 ") at "
- "offset 0x%" PRIx64 "\n",
- ms.addr, ms.len, seg->entry.offset);
-
- /* put the pointers back into their real positions using original
- * alignment */
- ms.addr_64 += seg->align;
- ms.phys_addr += seg->align;
- ms.ioremap_addr += seg->align;
- ms.len -= seg->align;
-
- /* at this point, the rest of DPDK memory is not initialized, so we
- * expect memsegs to be empty */
- memcpy(&mcfg->memseg[i], &ms,
- sizeof(struct rte_memseg));
-
- close(fd);
-
- RTE_LOG(DEBUG, EAL, "IVSHMEM segment found, size: 0x%lx\n",
- ms.len);
- }
-
- return 0;
-}
-
-/* this happens at a later stage, after general EAL memory initialization */
-int
-rte_eal_ivshmem_obj_init(void)
-{
- struct rte_ring_list* ring_list = NULL;
- struct rte_mem_config * mcfg;
- struct ivshmem_segment * seg;
- struct rte_memzone * mz;
- struct rte_ring * r;
- struct rte_tailq_entry *te;
- unsigned i, ms, idx;
- uint64_t offset;
-
- /* secondary process would not need any object discovery - it'll all
- * already be in shared config */
- if (rte_eal_process_type() != RTE_PROC_PRIMARY || ivshmem_config == NULL)
- return 0;
-
- /* check that we have an initialised ring tail queue */
- ring_list = RTE_TAILQ_LOOKUP(RTE_TAILQ_RING_NAME, rte_ring_list);
- if (ring_list == NULL) {
- RTE_LOG(ERR, EAL, "No rte_ring tailq found!\n");
- return -1;
- }
-
- mcfg = rte_eal_get_configuration()->mem_config;
-
- /* create memzones */
- for (i = 0; i < ivshmem_config->segment_idx && i <= RTE_MAX_MEMZONE; i++) {
-
- seg = &ivshmem_config->segment[i];
-
- /* add memzone */
- if (mcfg->memzone_cnt == RTE_MAX_MEMZONE) {
- RTE_LOG(ERR, EAL, "No more memory zones available!\n");
- return -1;
- }
-
- idx = mcfg->memzone_cnt;
-
- RTE_LOG(DEBUG, EAL, "Found memzone: '%s' at %p (len 0x%" PRIx64 ")\n",
- seg->entry.mz.name, seg->entry.mz.addr, seg->entry.mz.len);
-
- memcpy(&mcfg->memzone[idx], &seg->entry.mz,
- sizeof(struct rte_memzone));
-
- /* find ioremap address */
- for (ms = 0; ms <= RTE_MAX_MEMSEG; ms++) {
- if (ms == RTE_MAX_MEMSEG) {
- RTE_LOG(ERR, EAL, "Physical address of segment not found!\n");
- return -1;
- }
- if (CONTAINS(mcfg->memseg[ms], mcfg->memzone[idx])) {
- offset = mcfg->memzone[idx].addr_64 -
- mcfg->memseg[ms].addr_64;
- mcfg->memzone[idx].ioremap_addr = mcfg->memseg[ms].ioremap_addr +
- offset;
- break;
- }
- }
-
- mcfg->memzone_cnt++;
- }
-
- rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK);
-
- /* find rings */
- for (i = 0; i < mcfg->memzone_cnt; i++) {
- mz = &mcfg->memzone[i];
-
- /* check if memzone has a ring prefix */
- if (strncmp(mz->name, RTE_RING_MZ_PREFIX,
- sizeof(RTE_RING_MZ_PREFIX) - 1) != 0)
- continue;
-
- r = (struct rte_ring*) (mz->addr_64);
-
- te = rte_zmalloc("RING_TAILQ_ENTRY", sizeof(*te), 0);
- if (te == NULL) {
- RTE_LOG(ERR, EAL, "Cannot allocate ring tailq entry!\n");
- return -1;
- }
-
- te->data = (void *) r;
-
- TAILQ_INSERT_TAIL(ring_list, te, next);
-
- RTE_LOG(DEBUG, EAL, "Found ring: '%s' at %p\n", r->name, mz->addr);
- }
- rte_rwlock_write_unlock(RTE_EAL_TAILQ_RWLOCK);
-
-#ifdef RTE_LIBRTE_IVSHMEM_DEBUG
- rte_memzone_dump(stdout);
- rte_ring_list_dump(stdout);
-#endif
-
- return 0;
-}
-
-/* initialize ivshmem structures */
-int rte_eal_ivshmem_init(void)
-{
- struct rte_pci_device * dev;
- struct rte_pci_resource * res;
- int fd, ret;
- char path[PATH_MAX];
-
- /* initialize everything to 0 */
- memset(path, 0, sizeof(path));
- ivshmem_config = NULL;
-
- pagesz = getpagesize();
-
- RTE_LOG(DEBUG, EAL, "Searching for IVSHMEM devices...\n");
-
- if (rte_eal_process_type() == RTE_PROC_SECONDARY) {
-
- if (open_shared_config() < 0) {
- RTE_LOG(ERR, EAL, "Could not open IVSHMEM config!\n");
- return -1;
- }
- }
- else {
-
- TAILQ_FOREACH(dev, &pci_device_list, next) {
-
- if (is_ivshmem_device(dev)) {
-
- /* IVSHMEM memory is always on BAR2 */
- res = &dev->mem_resource[2];
-
- /* if we don't have a BAR2 */
- if (res->len == 0)
- continue;
-
- /* construct pci device path */
- snprintf(path, sizeof(path), IVSHMEM_RESOURCE_PATH,
- dev->addr.domain, dev->addr.bus, dev->addr.devid,
- dev->addr.function);
-
- /* try to find memseg */
- fd = open(path, O_RDWR);
- if (fd < 0) {
- RTE_LOG(ERR, EAL, "Could not open %s\n", path);
- return -1;
- }
-
- /* check if it's a DPDK IVSHMEM device */
- ret = has_ivshmem_metadata(fd, res->len);
-
- /* is DPDK device */
- if (ret == 1) {
-
- /* config file creation is deferred until the first
- * DPDK device is found. then, it has to be created
- * only once. */
- if (ivshmem_config == NULL &&
- create_shared_config() < 0) {
- RTE_LOG(ERR, EAL, "Could not create IVSHMEM config!\n");
- close(fd);
- return -1;
- }
-
- if (read_metadata(path, sizeof(path), fd, res->len) < 0) {
- RTE_LOG(ERR, EAL, "Could not read metadata from"
- " device %02x:%02x.%x!\n", dev->addr.bus,
- dev->addr.devid, dev->addr.function);
- close(fd);
- return -1;
- }
-
- if (ivshmem_config->pci_devs_idx == RTE_LIBRTE_IVSHMEM_MAX_PCI_DEVS) {
- RTE_LOG(WARNING, EAL,
- "IVSHMEM PCI device limit exceeded. Increase "
- "CONFIG_RTE_LIBRTE_IVSHMEM_MAX_PCI_DEVS in "
- "your config file.\n");
- break;
- }
-
- RTE_LOG(INFO, EAL, "Found IVSHMEM device %02x:%02x.%x\n",
- dev->addr.bus, dev->addr.devid, dev->addr.function);
-
- ivshmem_config->pci_devs[ivshmem_config->pci_devs_idx].ioremap_addr = res->phys_addr;
- snprintf(ivshmem_config->pci_devs[ivshmem_config->pci_devs_idx].path,
- sizeof(ivshmem_config->pci_devs[ivshmem_config->pci_devs_idx].path),
- "%s", path);
-
- ivshmem_config->pci_devs_idx++;
- }
- /* failed to read */
- else if (ret < 0) {
- RTE_LOG(ERR, EAL, "Could not read IVSHMEM device: %s\n",
- strerror(errno));
- close(fd);
- return -1;
- }
- /* not a DPDK device */
- else
- RTE_LOG(DEBUG, EAL, "Skipping non-DPDK IVSHMEM device\n");
-
- /* close the BAR fd */
- close(fd);
- }
- }
- }
-
- /* ivshmem_config is not NULL only if config was created and/or mapped */
- if (ivshmem_config) {
- if (map_all_segments() < 0) {
- RTE_LOG(ERR, EAL, "Mapping IVSHMEM segments failed!\n");
- return -1;
- }
- }
- else {
- RTE_LOG(DEBUG, EAL, "No IVSHMEM configuration found! \n");
- }
-
- return 0;
-}
-
-#endif
Code Review / deb_dpdk.git / blobdiff