From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) by dpdk.org (Postfix) with ESMTP id 7BA37376D for ; Wed, 15 Jul 2015 18:32:33 +0200 (CEST) Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga101.fm.intel.com with ESMTP; 15 Jul 2015 09:32:31 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,481,1432623600"; d="scan'208";a="524821818" Received: from irvmail001.ir.intel.com ([163.33.26.43]) by FMSMGA003.fm.intel.com with ESMTP; 15 Jul 2015 09:32:30 -0700 Received: from sivswdev02.ir.intel.com (sivswdev02.ir.intel.com [10.237.217.46]) by irvmail001.ir.intel.com (8.14.3/8.13.6/MailSET/Hub) with ESMTP id t6FGWTsQ002519 for ; Wed, 15 Jul 2015 17:32:29 +0100 Received: from sivswdev02.ir.intel.com (localhost [127.0.0.1]) by sivswdev02.ir.intel.com with ESMTP id t6FGWTOp000669 for ; Wed, 15 Jul 2015 17:32:29 +0100 Received: (from smonroy@localhost) by sivswdev02.ir.intel.com with id t6FGWTlK000665 for dev@dpdk.org; Wed, 15 Jul 2015 17:32:29 +0100 From: Sergio Gonzalez Monroy To: dev@dpdk.org Date: Wed, 15 Jul 2015 17:32:25 +0100 Message-Id: <1436977948-589-7-git-send-email-sergio.gonzalez.monroy@intel.com> X-Mailer: git-send-email 1.8.5.4 In-Reply-To: <1436977948-589-1-git-send-email-sergio.gonzalez.monroy@intel.com> References: <1436948793-12867-1-git-send-email-sergio.gonzalez.monroy@intel.com> <1436977948-589-1-git-send-email-sergio.gonzalez.monroy@intel.com> Subject: [dpdk-dev] [PATCH v10 6/9] eal: new rte_memzone_free X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches and discussions about DPDK List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 15 Jul 2015 16:32:34 -0000 Implement rte_memzone_free which, as its name implies, would free a memzone. Currently memzone are tracked in an array and cannot be free. To be able to reuse the same array to track memzones, we have to change how we keep track of reserved memzones. With this patch, any memzone with addr NULL is not used, so we also need to change how we look for the next memzone entry free. Signed-off-by: Sergio Gonzalez Monroy --- lib/librte_eal/bsdapp/eal/rte_eal_version.map | 6 ++ lib/librte_eal/common/eal_common_memzone.c | 68 ++++++++++++++++++++++- lib/librte_eal/common/include/rte_eal_memconfig.h | 2 +- lib/librte_eal/common/include/rte_memzone.h | 11 ++++ lib/librte_eal/linuxapp/eal/eal_ivshmem.c | 8 +-- lib/librte_eal/linuxapp/eal/rte_eal_version.map | 6 ++ 6 files changed, 93 insertions(+), 8 deletions(-) diff --git a/lib/librte_eal/bsdapp/eal/rte_eal_version.map b/lib/librte_eal/bsdapp/eal/rte_eal_version.map index c107b05..e537b42 100644 --- a/lib/librte_eal/bsdapp/eal/rte_eal_version.map +++ b/lib/librte_eal/bsdapp/eal/rte_eal_version.map @@ -111,3 +111,9 @@ DPDK_2.0 { local: *; }; + +DPDK_2.1 { + global: + + rte_memzone_free; +} DPDK_2.0; diff --git a/lib/librte_eal/common/eal_common_memzone.c b/lib/librte_eal/common/eal_common_memzone.c index 31bf6d8..7b1d77e 100644 --- a/lib/librte_eal/common/eal_common_memzone.c +++ b/lib/librte_eal/common/eal_common_memzone.c @@ -77,6 +77,23 @@ memzone_lookup_thread_unsafe(const char *name) return NULL; } +static inline struct rte_memzone * +get_next_free_memzone(void) +{ + struct rte_mem_config *mcfg; + unsigned i = 0; + + /* get pointer to global configuration */ + mcfg = rte_eal_get_configuration()->mem_config; + + for (i = 0; i < RTE_MAX_MEMZONE; i++) { + if (mcfg->memzone[i].addr == NULL) + return &mcfg->memzone[i]; + } + + return NULL; +} + /* This function will return the greatest free block if a heap has been * specified. If no heap has been specified, it will return the heap and * length of the greatest free block available in all heaps */ @@ -117,7 +134,7 @@ memzone_reserve_aligned_thread_unsafe(const char *name, size_t len, mcfg = rte_eal_get_configuration()->mem_config; /* no more room in config */ - if (mcfg->memzone_idx >= RTE_MAX_MEMZONE) { + if (mcfg->memzone_cnt >= RTE_MAX_MEMZONE) { RTE_LOG(ERR, EAL, "%s(): No more room in config\n", __func__); rte_errno = ENOSPC; return NULL; @@ -206,7 +223,16 @@ memzone_reserve_aligned_thread_unsafe(const char *name, size_t len, const struct malloc_elem *elem = malloc_elem_from_data(mz_addr); /* fill the zone in config */ - struct rte_memzone *mz = &mcfg->memzone[mcfg->memzone_idx++]; + struct rte_memzone *mz = get_next_free_memzone(); + + if (mz == NULL) { + RTE_LOG(ERR, EAL, "%s(): Cannot find free memzone but there is room " + "in config!\n", __func__); + rte_errno = ENOSPC; + return NULL; + } + + mcfg->memzone_cnt++; snprintf(mz->name, sizeof(mz->name), "%s", name); mz->phys_addr = rte_malloc_virt2phy(mz_addr); mz->addr = mz_addr; @@ -277,6 +303,42 @@ rte_memzone_reserve(const char *name, size_t len, int socket_id, flags, RTE_CACHE_LINE_SIZE, 0); } +int +rte_memzone_free(const struct rte_memzone *mz) +{ + struct rte_mem_config *mcfg; + int ret = 0; + void *addr; + unsigned idx; + + if (mz == NULL) + return -EINVAL; + + mcfg = rte_eal_get_configuration()->mem_config; + + rte_rwlock_write_lock(&mcfg->mlock); + + idx = ((uintptr_t)mz - (uintptr_t)mcfg->memzone); + idx = idx / sizeof(struct rte_memzone); + + addr = mcfg->memzone[idx].addr; + if (addr == NULL) + ret = -EINVAL; + else if (mcfg->memzone_cnt == 0) { + rte_panic("%s(): memzone address not NULL but memzone_cnt is 0!\n", + __func__); + } else { + memset(&mcfg->memzone[idx], 0, sizeof(mcfg->memzone[idx])); + mcfg->memzone_cnt--; + } + + rte_rwlock_write_unlock(&mcfg->mlock); + + rte_free(addr); + + return ret; +} + /* * Lookup for the memzone identified by the given name */ @@ -349,7 +411,7 @@ rte_eal_memzone_init(void) rte_rwlock_write_lock(&mcfg->mlock); /* delete all zones */ - mcfg->memzone_idx = 0; + mcfg->memzone_cnt = 0; memset(mcfg->memzone, 0, sizeof(mcfg->memzone)); rte_rwlock_write_unlock(&mcfg->mlock); diff --git a/lib/librte_eal/common/include/rte_eal_memconfig.h b/lib/librte_eal/common/include/rte_eal_memconfig.h index 7de906b..2b5e0b1 100644 --- a/lib/librte_eal/common/include/rte_eal_memconfig.h +++ b/lib/librte_eal/common/include/rte_eal_memconfig.h @@ -67,7 +67,7 @@ struct rte_mem_config { rte_rwlock_t qlock; /**< used for tailq operation for thread safe. */ rte_rwlock_t mplock; /**< only used by mempool LIB for thread-safe. */ - uint32_t memzone_idx; /**< Index of memzone */ + uint32_t memzone_cnt; /**< Number of allocated memzones */ /* memory segments and zones */ struct rte_memseg memseg[RTE_MAX_MEMSEG]; /**< Physmem descriptors. */ diff --git a/lib/librte_eal/common/include/rte_memzone.h b/lib/librte_eal/common/include/rte_memzone.h index de5ae55..38e5f5b 100644 --- a/lib/librte_eal/common/include/rte_memzone.h +++ b/lib/librte_eal/common/include/rte_memzone.h @@ -256,6 +256,17 @@ const struct rte_memzone *rte_memzone_reserve_bounded(const char *name, unsigned flags, unsigned align, unsigned bound); /** + * Free a memzone. + * + * @param mz + * A pointer to the memzone + * @return + * -EINVAL - invalid parameter + * 0 - success + */ +int rte_memzone_free(const struct rte_memzone *mz); + +/** * Lookup for a memzone. * * Get a pointer to a descriptor of an already reserved memory diff --git a/lib/librte_eal/linuxapp/eal/eal_ivshmem.c b/lib/librte_eal/linuxapp/eal/eal_ivshmem.c index facfb80..589019b 100644 --- a/lib/librte_eal/linuxapp/eal/eal_ivshmem.c +++ b/lib/librte_eal/linuxapp/eal/eal_ivshmem.c @@ -768,12 +768,12 @@ rte_eal_ivshmem_obj_init(void) seg = &ivshmem_config->segment[i]; /* add memzone */ - if (mcfg->memzone_idx == RTE_MAX_MEMZONE) { + if (mcfg->memzone_cnt == RTE_MAX_MEMZONE) { RTE_LOG(ERR, EAL, "No more memory zones available!\n"); return -1; } - idx = mcfg->memzone_idx; + 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); @@ -796,13 +796,13 @@ rte_eal_ivshmem_obj_init(void) } } - mcfg->memzone_idx++; + mcfg->memzone_cnt++; } rte_rwlock_write_lock(RTE_EAL_TAILQ_RWLOCK); /* find rings */ - for (i = 0; i < mcfg->memzone_idx; i++) { + for (i = 0; i < mcfg->memzone_cnt; i++) { mz = &mcfg->memzone[i]; /* check if memzone has a ring prefix */ diff --git a/lib/librte_eal/linuxapp/eal/rte_eal_version.map b/lib/librte_eal/linuxapp/eal/rte_eal_version.map index c107b05..e537b42 100644 --- a/lib/librte_eal/linuxapp/eal/rte_eal_version.map +++ b/lib/librte_eal/linuxapp/eal/rte_eal_version.map @@ -111,3 +111,9 @@ DPDK_2.0 { local: *; }; + +DPDK_2.1 { + global: + + rte_memzone_free; +} DPDK_2.0; -- 1.9.3