From 4c133c39ae1bc541b3db5903a680da738a0c57e3 Mon Sep 17 00:00:00 2001 From: Ariel Elior Date: Wed, 23 Jan 2013 03:21:54 +0000 Subject: [PATCH] bnx2x: SR-IOV version compatibility bugfix When posting a message on the bulletin board, the PF calculates crc over the message and places the result in the message. When the VF samples the Bulletin Board it copies the message aside and validates this crc. The length of the message is crucial here and must be the same in both parties. Since the PF is running in the Hypervisor and the VF is running in a Vm, they can possibly be of different versions. As the Bulletin Board is designed to grow forward in future versions, in the VF the length must not be the size of the message structure but instead it should be a field in the message itself. Signed-off-by: Ariel Elior Signed-off-by: Yuval Mintz Signed-off-by: David S. Miller --- drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c | 2 +- drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c | 4 ++-- drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h | 3 ++- 3 files changed, 5 insertions(+), 4 deletions(-) diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c index 5e45cb9..6adfa20 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_sriov.c @@ -3124,7 +3124,7 @@ u32 bnx2x_crc_vf_bulletin(struct bnx2x *bp, { return crc32(BULLETIN_CRC_SEED, ((u8 *)bulletin) + sizeof(bulletin->crc), - BULLETIN_CONTENT_SIZE - sizeof(bulletin->crc)); + bulletin->length - sizeof(bulletin->crc)); } /* Check for new posts on the bulletin board */ diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c index 9cef520..3624612 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.c @@ -1631,7 +1631,6 @@ int bnx2x_post_vf_bulletin(struct bnx2x *bp, int vf) dma_addr_t pf_addr = BP_VF_BULLETIN_DMA(bp)->mapping + vf * BULLETIN_CONTENT_SIZE; dma_addr_t vf_addr = bnx2x_vf(bp, vf, bulletin_map); - u32 len = BULLETIN_CONTENT_SIZE; int rc; /* can only update vf after init took place */ @@ -1641,11 +1640,12 @@ int bnx2x_post_vf_bulletin(struct bnx2x *bp, int vf) /* increment bulletin board version and compute crc */ bulletin->version++; + bulletin->length = BULLETIN_CONTENT_SIZE; bulletin->crc = bnx2x_crc_vf_bulletin(bp, bulletin); /* propagate bulletin board via dmae to vm memory */ rc = bnx2x_copy32_vf_dmae(bp, false, pf_addr, bnx2x_vf(bp, vf, abs_vfid), U64_HI(vf_addr), - U64_LO(vf_addr), len/4); + U64_LO(vf_addr), bulletin->length / 4); return rc; } diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h index a74477c..bfc80ba 100644 --- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h +++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h @@ -318,7 +318,8 @@ struct pf_vf_bulletin_content { u32 crc; /* crc of structure to ensure is not in * mid-update */ - u32 version; + u16 version; + u16 length; aligned_u64 valid_bitmap; /* bitmap indicating which fields * hold valid values -- 2.7.4