first version

1 files changed, 533 insertions, 0 deletions

diff --git a/src/dpdk_lib18/librte_eal/common/eal_common_memzone.c b/src/dpdk_lib18/librte_eal/common/eal_common_memzone.c
new file mode 100755
index 00000000..b5a5d727
--- /dev/null
+++ b/src/dpdk_lib18/librte_eal/common/eal_common_memzone.c
@@ -0,0 +1,533 @@
+/*-
+ *   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.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdint.h>
+#include <stdarg.h>
+#include <inttypes.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/queue.h>
+
+#include <rte_log.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_eal_memconfig.h>
+#include <rte_per_lcore.h>
+#include <rte_errno.h>
+#include <rte_string_fns.h>
+#include <rte_common.h>
+
+#include "eal_private.h"
+
+/* internal copy of free memory segments */
+static struct rte_memseg *free_memseg = NULL;
+
+static inline const struct rte_memzone *
+memzone_lookup_thread_unsafe(const char *name)
+{
+	const struct rte_mem_config *mcfg;
+	unsigned i = 0;
+
+	/* get pointer to global configuration */
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	/*
+	 * the algorithm is not optimal (linear), but there are few
+	 * zones and this function should be called at init only
+	 */
+	for (i = 0; i < RTE_MAX_MEMZONE && mcfg->memzone[i].addr != NULL; i++) {
+		if (!strncmp(name, mcfg->memzone[i].name, RTE_MEMZONE_NAMESIZE))
+			return &mcfg->memzone[i];
+	}
+
+	return NULL;
+}
+
+/*
+ * Return a pointer to a correctly filled memzone descriptor. If the
+ * allocation cannot be done, return NULL.
+ */
+const struct rte_memzone *
+rte_memzone_reserve(const char *name, size_t len, int socket_id,
+		      unsigned flags)
+{
+	return rte_memzone_reserve_aligned(name,
+			len, socket_id, flags, RTE_CACHE_LINE_SIZE);
+}
+
+/*
+ * Helper function for memzone_reserve_aligned_thread_unsafe().
+ * Calculate address offset from the start of the segment.
+ * Align offset in that way that it satisfy istart alignmnet and
+ * buffer of the  requested length would not cross specified boundary.
+ */
+static inline phys_addr_t
+align_phys_boundary(const struct rte_memseg *ms, size_t len, size_t align,
+	size_t bound)
+{
+	phys_addr_t addr_offset, bmask, end, start;
+	size_t step;
+
+	step = RTE_MAX(align, bound);
+	bmask = ~((phys_addr_t)bound - 1);
+
+	/* calculate offset to closest alignment */
+	start = RTE_ALIGN_CEIL(ms->phys_addr, align);
+	addr_offset = start - ms->phys_addr;
+
+	while (addr_offset + len < ms->len) {
+
+		/* check, do we meet boundary condition */
+		end = start + len - (len != 0);
+		if ((start & bmask) == (end & bmask))
+			break;
+
+		/* calculate next offset */
+		start = RTE_ALIGN_CEIL(start + 1, step);
+		addr_offset = start - ms->phys_addr;
+	}
+
+	return (addr_offset);
+}
+
+static const struct rte_memzone *
+memzone_reserve_aligned_thread_unsafe(const char *name, size_t len,
+		int socket_id, unsigned flags, unsigned align, unsigned bound)
+{
+	struct rte_mem_config *mcfg;
+	unsigned i = 0;
+	int memseg_idx = -1;
+	uint64_t addr_offset, seg_offset = 0;
+	size_t requested_len;
+	size_t memseg_len = 0;
+	phys_addr_t memseg_physaddr;
+	void *memseg_addr;
+
+	/* get pointer to global configuration */
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	/* no more room in config */
+	if (mcfg->memzone_idx >= RTE_MAX_MEMZONE) {
+		RTE_LOG(ERR, EAL, "%s(): No more room in config\n", __func__);
+		rte_errno = ENOSPC;
+		return NULL;
+	}
+
+	/* zone already exist */
+	if ((memzone_lookup_thread_unsafe(name)) != NULL) {
+		RTE_LOG(DEBUG, EAL, "%s(): memzone <%s> already exists\n",
+			__func__, name);
+		rte_errno = EEXIST;
+		return NULL;
+	}
+
+	/* if alignment is not a power of two */
+	if (!rte_is_power_of_2(align)) {
+		RTE_LOG(ERR, EAL, "%s(): Invalid alignment: %u\n", __func__,
+				align);
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	/* alignment less than cache size is not allowed */
+	if (align < RTE_CACHE_LINE_SIZE)
+		align = RTE_CACHE_LINE_SIZE;
+
+
+	/* align length on cache boundary. Check for overflow before doing so */
+	if (len > SIZE_MAX - RTE_CACHE_LINE_MASK) {
+		rte_errno = EINVAL; /* requested size too big */
+		return NULL;
+	}
+
+	len += RTE_CACHE_LINE_MASK;
+	len &= ~((size_t) RTE_CACHE_LINE_MASK);
+
+	/* save minimal requested  length */
+	requested_len = RTE_MAX((size_t)RTE_CACHE_LINE_SIZE,  len);
+
+	/* check that boundary condition is valid */
+	if (bound != 0 &&
+			(requested_len > bound || !rte_is_power_of_2(bound))) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	/* find the smallest segment matching requirements */
+	for (i = 0; i < RTE_MAX_MEMSEG; i++) {
+		/* last segment */
+		if (free_memseg[i].addr == NULL)
+			break;
+
+		/* empty segment, skip it */
+		if (free_memseg[i].len == 0)
+			continue;
+
+		/* bad socket ID */
+		if (socket_id != SOCKET_ID_ANY &&
+		    free_memseg[i].socket_id != SOCKET_ID_ANY &&
+		    socket_id != free_memseg[i].socket_id)
+			continue;
+
+		/*
+		 * calculate offset to closest alignment that
+		 * meets boundary conditions.
+		 */
+		addr_offset = align_phys_boundary(free_memseg + i,
+			requested_len, align, bound);
+
+		/* check len */
+		if ((requested_len + addr_offset) > free_memseg[i].len)
+			continue;
+
+		/* check flags for hugepage sizes */
+		if ((flags & RTE_MEMZONE_2MB) &&
+				free_memseg[i].hugepage_sz == RTE_PGSIZE_1G)
+			continue;
+		if ((flags & RTE_MEMZONE_1GB) &&
+				free_memseg[i].hugepage_sz == RTE_PGSIZE_2M)
+			continue;
+		if ((flags & RTE_MEMZONE_16MB) &&
+				free_memseg[i].hugepage_sz == RTE_PGSIZE_16G)
+			continue;
+		if ((flags & RTE_MEMZONE_16GB) &&
+				free_memseg[i].hugepage_sz == RTE_PGSIZE_16M)
+			continue;
+
+		/* this segment is the best until now */
+		if (memseg_idx == -1) {
+			memseg_idx = i;
+			memseg_len = free_memseg[i].len;
+			seg_offset = addr_offset;
+		}
+		/* find the biggest contiguous zone */
+		else if (len == 0) {
+			if (free_memseg[i].len > memseg_len) {
+				memseg_idx = i;
+				memseg_len = free_memseg[i].len;
+				seg_offset = addr_offset;
+			}
+		}
+		/*
+		 * find the smallest (we already checked that current
+		 * zone length is > len
+		 */
+		else if (free_memseg[i].len + align < memseg_len ||
+				(free_memseg[i].len <= memseg_len + align &&
+				addr_offset < seg_offset)) {
+			memseg_idx = i;
+			memseg_len = free_memseg[i].len;
+			seg_offset = addr_offset;
+		}
+	}
+
+	/* no segment found */
+	if (memseg_idx == -1) {
+		/*
+		 * If RTE_MEMZONE_SIZE_HINT_ONLY flag is specified,
+		 * try allocating again without the size parameter otherwise -fail.
+		 */
+		if ((flags & RTE_MEMZONE_SIZE_HINT_ONLY)  &&
+		    ((flags & RTE_MEMZONE_1GB) || (flags & RTE_MEMZONE_2MB)
+		|| (flags & RTE_MEMZONE_16MB) || (flags & RTE_MEMZONE_16GB)))
+			return memzone_reserve_aligned_thread_unsafe(name,
+				len, socket_id, 0, align, bound);
+
+		rte_errno = ENOMEM;
+		return NULL;
+	}
+
+	/* save aligned physical and virtual addresses */
+	memseg_physaddr = free_memseg[memseg_idx].phys_addr + seg_offset;
+	memseg_addr = RTE_PTR_ADD(free_memseg[memseg_idx].addr,
+			(uintptr_t) seg_offset);
+
+	/* if we are looking for a biggest memzone */
+	if (len == 0) {
+		if (bound == 0)
+			requested_len = memseg_len - seg_offset;
+		else
+			requested_len = RTE_ALIGN_CEIL(memseg_physaddr + 1,
+				bound) - memseg_physaddr;
+	}
+
+	/* set length to correct value */
+	len = (size_t)seg_offset + requested_len;
+
+	/* update our internal state */
+	free_memseg[memseg_idx].len -= len;
+	free_memseg[memseg_idx].phys_addr += len;
+	free_memseg[memseg_idx].addr =
+		(char *)free_memseg[memseg_idx].addr + len;
+
+	/* fill the zone in config */
+	struct rte_memzone *mz = &mcfg->memzone[mcfg->memzone_idx++];
+	snprintf(mz->name, sizeof(mz->name), "%s", name);
+	mz->phys_addr = memseg_physaddr;
+	mz->addr = memseg_addr;
+	mz->len = requested_len;
+	mz->hugepage_sz = free_memseg[memseg_idx].hugepage_sz;
+	mz->socket_id = free_memseg[memseg_idx].socket_id;
+	mz->flags = 0;
+	mz->memseg_id = memseg_idx;
+
+	return mz;
+}
+
+/*
+ * Return a pointer to a correctly filled memzone descriptor (with a
+ * specified alignment). If the allocation cannot be done, return NULL.
+ */
+const struct rte_memzone *
+rte_memzone_reserve_aligned(const char *name, size_t len,
+		int socket_id, unsigned flags, unsigned align)
+{
+	struct rte_mem_config *mcfg;
+	const struct rte_memzone *mz = NULL;
+
+	/* both sizes cannot be explicitly called for */
+	if (((flags & RTE_MEMZONE_1GB) && (flags & RTE_MEMZONE_2MB))
+		|| ((flags & RTE_MEMZONE_16MB) && (flags & RTE_MEMZONE_16GB))) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	/* get pointer to global configuration */
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	rte_rwlock_write_lock(&mcfg->mlock);
+
+	mz = memzone_reserve_aligned_thread_unsafe(
+		name, len, socket_id, flags, align, 0);
+
+	rte_rwlock_write_unlock(&mcfg->mlock);
+
+	return mz;
+}
+
+/*
+ * Return a pointer to a correctly filled memzone descriptor (with a
+ * specified alignment and boundary).
+ * If the allocation cannot be done, return NULL.
+ */
+const struct rte_memzone *
+rte_memzone_reserve_bounded(const char *name, size_t len,
+		int socket_id, unsigned flags, unsigned align, unsigned bound)
+{
+	struct rte_mem_config *mcfg;
+	const struct rte_memzone *mz = NULL;
+
+	/* both sizes cannot be explicitly called for */
+	if (((flags & RTE_MEMZONE_1GB) && (flags & RTE_MEMZONE_2MB))
+		|| ((flags & RTE_MEMZONE_16MB) && (flags & RTE_MEMZONE_16GB))) {
+		rte_errno = EINVAL;
+		return NULL;
+	}
+
+	/* get pointer to global configuration */
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	rte_rwlock_write_lock(&mcfg->mlock);
+
+	mz = memzone_reserve_aligned_thread_unsafe(
+		name, len, socket_id, flags, align, bound);
+
+	rte_rwlock_write_unlock(&mcfg->mlock);
+
+	return mz;
+}
+
+
+/*
+ * Lookup for the memzone identified by the given name
+ */
+const struct rte_memzone *
+rte_memzone_lookup(const char *name)
+{
+	struct rte_mem_config *mcfg;
+	const struct rte_memzone *memzone = NULL;
+
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	rte_rwlock_read_lock(&mcfg->mlock);
+
+	memzone = memzone_lookup_thread_unsafe(name);
+
+	rte_rwlock_read_unlock(&mcfg->mlock);
+
+	return memzone;
+}
+
+/* Dump all reserved memory zones on console */
+void
+rte_memzone_dump(FILE *f)
+{
+	struct rte_mem_config *mcfg;
+	unsigned i = 0;
+
+	/* get pointer to global configuration */
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	rte_rwlock_read_lock(&mcfg->mlock);
+	/* dump all zones */
+	for (i=0; i<RTE_MAX_MEMZONE; i++) {
+		if (mcfg->memzone[i].addr == NULL)
+			break;
+		fprintf(f, "Zone %u: name:<%s>, phys:0x%"PRIx64", len:0x%zx"
+		       ", virt:%p, socket_id:%"PRId32", flags:%"PRIx32"\n", i,
+		       mcfg->memzone[i].name,
+		       mcfg->memzone[i].phys_addr,
+		       mcfg->memzone[i].len,
+		       mcfg->memzone[i].addr,
+		       mcfg->memzone[i].socket_id,
+		       mcfg->memzone[i].flags);
+	}
+	rte_rwlock_read_unlock(&mcfg->mlock);
+}
+
+/*
+ * called by init: modify the free memseg list to have cache-aligned
+ * addresses and cache-aligned lengths
+ */
+static int
+memseg_sanitize(struct rte_memseg *memseg)
+{
+	unsigned phys_align;
+	unsigned virt_align;
+	unsigned off;
+
+	phys_align = memseg->phys_addr & RTE_CACHE_LINE_MASK;
+	virt_align = (unsigned long)memseg->addr & RTE_CACHE_LINE_MASK;
+
+	/*
+	 * sanity check: phys_addr and addr must have the same
+	 * alignment
+	 */
+	if (phys_align != virt_align)
+		return -1;
+
+	/* memseg is really too small, don't bother with it */
+	if (memseg->len < (2 * RTE_CACHE_LINE_SIZE)) {
+		memseg->len = 0;
+		return 0;
+	}
+
+	/* align start address */
+	off = (RTE_CACHE_LINE_SIZE - phys_align) & RTE_CACHE_LINE_MASK;
+	memseg->phys_addr += off;
+	memseg->addr = (char *)memseg->addr + off;
+	memseg->len -= off;
+
+	/* align end address */
+	memseg->len &= ~((uint64_t)RTE_CACHE_LINE_MASK);
+
+	return 0;
+}
+
+/*
+ * Init the memzone subsystem
+ */
+int
+rte_eal_memzone_init(void)
+{
+	struct rte_mem_config *mcfg;
+	const struct rte_memseg *memseg;
+	unsigned i = 0;
+
+	/* get pointer to global configuration */
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	/* mirror the runtime memsegs from config */
+	free_memseg = mcfg->free_memseg;
+
+	/* secondary processes don't need to initialise anything */
+	if (rte_eal_process_type() == RTE_PROC_SECONDARY)
+		return 0;
+
+	memseg = rte_eal_get_physmem_layout();
+	if (memseg == NULL) {
+		RTE_LOG(ERR, EAL, "%s(): Cannot get physical layout\n", __func__);
+		return -1;
+	}
+
+	rte_rwlock_write_lock(&mcfg->mlock);
+
+	/* fill in uninitialized free_memsegs */
+	for (i = 0; i < RTE_MAX_MEMSEG; i++) {
+		if (memseg[i].addr == NULL)
+			break;
+		if (free_memseg[i].addr != NULL)
+			continue;
+		memcpy(&free_memseg[i], &memseg[i], sizeof(struct rte_memseg));
+	}
+
+	/* make all zones cache-aligned */
+	for (i = 0; i < RTE_MAX_MEMSEG; i++) {
+		if (free_memseg[i].addr == NULL)
+			break;
+		if (memseg_sanitize(&free_memseg[i]) < 0) {
+			RTE_LOG(ERR, EAL, "%s(): Sanity check failed\n", __func__);
+			rte_rwlock_write_unlock(&mcfg->mlock);
+			return -1;
+		}
+	}
+
+	/* delete all zones */
+	mcfg->memzone_idx = 0;
+	memset(mcfg->memzone, 0, sizeof(mcfg->memzone));
+
+	rte_rwlock_write_unlock(&mcfg->mlock);
+
+	return 0;
+}
+
+/* Walk all reserved memory zones */
+void rte_memzone_walk(void (*func)(const struct rte_memzone *, void *),
+		      void *arg)
+{
+	struct rte_mem_config *mcfg;
+	unsigned i;
+
+	mcfg = rte_eal_get_configuration()->mem_config;
+
+	rte_rwlock_read_lock(&mcfg->mlock);
+	for (i=0; i<RTE_MAX_MEMZONE; i++) {
+		if (mcfg->memzone[i].addr != NULL)
+			(*func)(&mcfg->memzone[i], arg);
+	}
+	rte_rwlock_read_unlock(&mcfg->mlock);
+}