#include "eal_memalloc.h"
#include "eal_private.h"
#include "eal_internal_cfg.h"
+#include "malloc_heap.h"
/*
* Try to mmap *size bytes in /dev/zero. If it is successful, return the
* Current known limitations are 39 or 40 bits. Setting the starting address
* at 4GB implies there are 508GB or 1020GB for mapping the available
* hugepages. This is likely enough for most systems, although a device with
- * addressing limitations should call rte_eal_check_dma_mask for ensuring all
+ * addressing limitations should call rte_mem_check_dma_mask for ensuring all
* memory is within supported range.
*/
static uint64_t baseaddr = 0x100000000;
return 1;
}
-#if defined(RTE_ARCH_64)
#define MAX_DMA_MASK_BITS 63
-#else
-#define MAX_DMA_MASK_BITS 31
-#endif
/* check memseg iovas are within the required range based on dma mask */
-int __rte_experimental
-rte_eal_check_dma_mask(uint8_t maskbits)
+static int __rte_experimental
+check_dma_mask(uint8_t maskbits, bool thread_unsafe)
{
struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
uint64_t mask;
+ int ret;
- /* sanity check */
+ /* Sanity check. We only check width can be managed with 64 bits
+ * variables. Indeed any higher value is likely wrong. */
if (maskbits > MAX_DMA_MASK_BITS) {
RTE_LOG(ERR, EAL, "wrong dma mask size %u (Max: %u)\n",
maskbits, MAX_DMA_MASK_BITS);
/* create dma mask */
mask = ~((1ULL << maskbits) - 1);
- if (rte_memseg_walk(check_iova, &mask))
+ if (thread_unsafe)
+ ret = rte_memseg_walk_thread_unsafe(check_iova, &mask);
+ else
+ ret = rte_memseg_walk(check_iova, &mask);
+
+ if (ret)
/*
* Dma mask precludes hugepage usage.
* This device can not be used and we do not need to keep
return 0;
}
+int __rte_experimental
+rte_mem_check_dma_mask(uint8_t maskbits)
+{
+ return check_dma_mask(maskbits, false);
+}
+
+int __rte_experimental
+rte_mem_check_dma_mask_thread_unsafe(uint8_t maskbits)
+{
+ return check_dma_mask(maskbits, true);
+}
+
+/*
+ * Set dma mask to use when memory initialization is done.
+ *
+ * This function should ONLY be used by code executed before the memory
+ * initialization. PMDs should use rte_mem_check_dma_mask if addressing
+ * limitations by the device.
+ */
+void __rte_experimental
+rte_mem_set_dma_mask(uint8_t maskbits)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+
+ mcfg->dma_maskbits = mcfg->dma_maskbits == 0 ? maskbits :
+ RTE_MIN(mcfg->dma_maskbits, maskbits);
+}
+
/* return the number of memory channels */
unsigned rte_memory_get_nchannel(void)
{
return -1;
}
+ /* segment fd API is not supported for external segments */
+ if (msl->external) {
+ rte_errno = ENOTSUP;
+ return -1;
+ }
+
ret = eal_memalloc_get_seg_fd(msl_idx, seg_idx);
if (ret < 0) {
rte_errno = -ret;
return -1;
}
+ /* segment fd API is not supported for external segments */
+ if (msl->external) {
+ rte_errno = ENOTSUP;
+ return -1;
+ }
+
ret = eal_memalloc_get_seg_fd_offset(msl_idx, seg_idx, offset);
if (ret < 0) {
rte_errno = -ret;
return ret;
}
+int __rte_experimental
+rte_extmem_register(void *va_addr, size_t len, rte_iova_t iova_addrs[],
+ unsigned int n_pages, size_t page_sz)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ unsigned int socket_id, n;
+ int ret = 0;
+
+ if (va_addr == NULL || page_sz == 0 || len == 0 ||
+ !rte_is_power_of_2(page_sz) ||
+ RTE_ALIGN(len, page_sz) != len ||
+ ((len / page_sz) != n_pages && iova_addrs != NULL) ||
+ !rte_is_aligned(va_addr, page_sz)) {
+ rte_errno = EINVAL;
+ return -1;
+ }
+ rte_rwlock_write_lock(&mcfg->memory_hotplug_lock);
+
+ /* make sure the segment doesn't already exist */
+ if (malloc_heap_find_external_seg(va_addr, len) != NULL) {
+ rte_errno = EEXIST;
+ ret = -1;
+ goto unlock;
+ }
+
+ /* get next available socket ID */
+ socket_id = mcfg->next_socket_id;
+ if (socket_id > INT32_MAX) {
+ RTE_LOG(ERR, EAL, "Cannot assign new socket ID's\n");
+ rte_errno = ENOSPC;
+ ret = -1;
+ goto unlock;
+ }
+
+ /* we can create a new memseg */
+ n = len / page_sz;
+ if (malloc_heap_create_external_seg(va_addr, iova_addrs, n,
+ page_sz, "extmem", socket_id) == NULL) {
+ ret = -1;
+ goto unlock;
+ }
+
+ /* memseg list successfully created - increment next socket ID */
+ mcfg->next_socket_id++;
+unlock:
+ rte_rwlock_write_unlock(&mcfg->memory_hotplug_lock);
+ return ret;
+}
+
+int __rte_experimental
+rte_extmem_unregister(void *va_addr, size_t len)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct rte_memseg_list *msl;
+ int ret = 0;
+
+ if (va_addr == NULL || len == 0) {
+ rte_errno = EINVAL;
+ return -1;
+ }
+ rte_rwlock_write_lock(&mcfg->memory_hotplug_lock);
+
+ /* find our segment */
+ msl = malloc_heap_find_external_seg(va_addr, len);
+ if (msl == NULL) {
+ rte_errno = ENOENT;
+ ret = -1;
+ goto unlock;
+ }
+
+ ret = malloc_heap_destroy_external_seg(msl);
+unlock:
+ rte_rwlock_write_unlock(&mcfg->memory_hotplug_lock);
+ return ret;
+}
+
+static int
+sync_memory(void *va_addr, size_t len, bool attach)
+{
+ struct rte_mem_config *mcfg = rte_eal_get_configuration()->mem_config;
+ struct rte_memseg_list *msl;
+ int ret = 0;
+
+ if (va_addr == NULL || len == 0) {
+ rte_errno = EINVAL;
+ return -1;
+ }
+ rte_rwlock_write_lock(&mcfg->memory_hotplug_lock);
+
+ /* find our segment */
+ msl = malloc_heap_find_external_seg(va_addr, len);
+ if (msl == NULL) {
+ rte_errno = ENOENT;
+ ret = -1;
+ goto unlock;
+ }
+ if (attach)
+ ret = rte_fbarray_attach(&msl->memseg_arr);
+ else
+ ret = rte_fbarray_detach(&msl->memseg_arr);
+
+unlock:
+ rte_rwlock_write_unlock(&mcfg->memory_hotplug_lock);
+ return ret;
+}
+
+int __rte_experimental
+rte_extmem_attach(void *va_addr, size_t len)
+{
+ return sync_memory(va_addr, len, true);
+}
+
+int __rte_experimental
+rte_extmem_detach(void *va_addr, size_t len)
+{
+ return sync_memory(va_addr, len, false);
+}
+
/* init memory subsystem */
int
rte_eal_memory_init(void)
git.droids-corp.org / dpdk.git / blobdiff