From 75bcfde6c1131371adc2388b9226db7b2465e4c1 Mon Sep 17 00:00:00 2001 From: Alex Elder Date: Wed, 9 Jun 2021 17:35:01 -0500 Subject: [PATCH] net: ipa: validate memory regions based on version Introduce ipa_mem_id_valid(), and use it to check defined memory regions to ensure they are valid for a given version of IPA. Signed-off-by: Alex Elder Signed-off-by: David S. Miller --- drivers/net/ipa/ipa_mem.c | 61 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) diff --git a/drivers/net/ipa/ipa_mem.c b/drivers/net/ipa/ipa_mem.c index 29c626c..e5ca6a2 100644 --- a/drivers/net/ipa/ipa_mem.c +++ b/drivers/net/ipa/ipa_mem.c @@ -99,6 +99,61 @@ int ipa_mem_setup(struct ipa *ipa) return 0; } +/* Is the given memory region ID is valid for the current IPA version? */ +static bool ipa_mem_id_valid(struct ipa *ipa, enum ipa_mem_id mem_id) +{ + enum ipa_version version = ipa->version; + + switch (mem_id) { + case IPA_MEM_UC_SHARED: + case IPA_MEM_UC_INFO: + case IPA_MEM_V4_FILTER_HASHED: + case IPA_MEM_V4_FILTER: + case IPA_MEM_V6_FILTER_HASHED: + case IPA_MEM_V6_FILTER: + case IPA_MEM_V4_ROUTE_HASHED: + case IPA_MEM_V4_ROUTE: + case IPA_MEM_V6_ROUTE_HASHED: + case IPA_MEM_V6_ROUTE: + case IPA_MEM_MODEM_HEADER: + case IPA_MEM_AP_HEADER: + case IPA_MEM_MODEM_PROC_CTX: + case IPA_MEM_AP_PROC_CTX: + case IPA_MEM_MODEM: + case IPA_MEM_UC_EVENT_RING: + case IPA_MEM_PDN_CONFIG: + case IPA_MEM_STATS_QUOTA_MODEM: + case IPA_MEM_STATS_QUOTA_AP: + case IPA_MEM_END_MARKER: /* pseudo region */ + break; + + case IPA_MEM_STATS_TETHERING: + case IPA_MEM_STATS_DROP: + if (version < IPA_VERSION_4_0) + return false; + break; + + case IPA_MEM_STATS_V4_FILTER: + case IPA_MEM_STATS_V6_FILTER: + case IPA_MEM_STATS_V4_ROUTE: + case IPA_MEM_STATS_V6_ROUTE: + if (version < IPA_VERSION_4_0 || version > IPA_VERSION_4_2) + return false; + break; + + case IPA_MEM_NAT_TABLE: + case IPA_MEM_STATS_FILTER_ROUTE: + if (version < IPA_VERSION_4_5) + return false; + break; + + default: + return false; + } + + return true; +} + /* Must the given memory region be present in the configuration? */ static bool ipa_mem_id_required(struct ipa *ipa, enum ipa_mem_id mem_id) { @@ -135,6 +190,12 @@ static bool ipa_mem_valid_one(struct ipa *ipa, const struct ipa_mem *mem) enum ipa_mem_id mem_id = mem->id; u16 size_multiple; + /* Make sure the memory region is valid for this version of IPA */ + if (!ipa_mem_id_valid(ipa, mem_id)) { + dev_err(dev, "region id %u not valid\n", mem_id); + return false; + } + /* Other than modem memory, sizes must be a multiple of 8 */ size_multiple = mem_id == IPA_MEM_MODEM ? 4 : 8; if (mem->size % size_multiple) -- 2.7.4