[PATCH net-next v3 03/22] bnx2x: Add to VF <-> PF channel the release request

Ariel Elior
2012-12-10T15:44:08Z

VF driver uses this request when removed. The PF driver
reclaims all resources allocated for that VF at this
time.

Signed-off-by: Ariel Elior <ariele@broadcom.com>
Signed-off-by: Eilon Greenstein <eilong@broadcom.com>
---
drivers/net/ethernet/broadcom/bnx2x/bnx2x.h | 1 +
drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c | 45 ++++++++++++++++++++++
drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h | 16 +++++++-
3 files changed, 61 insertions(+), 1 deletions(-)

diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
index a201ab2..6cafa4e 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x.h
@@ -2220,6 +2220,7 @@ static inline u32 reg_poll(struct bnx2x *bp, u32 reg, u32 expected, int ms,
int bnx2x_get_vf_id(struct bnx2x *bp, u32 *vf_id);
int bnx2x_send_msg2pf(struct bnx2x *bp, u8 *done, dma_addr_t msg_mapping);
int bnx2x_vfpf_acquire(struct bnx2x *bp, u8 tx_count, u8 rx_count);
+int bnx2x_vfpf_release(struct bnx2x *bp);
/* Congestion management fairness mode */
#define CMNG_FNS_NONE 0
#define CMNG_FNS_MINMAX 1
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
index 061c25b..2a8c4c2 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_main.c
@@ -12364,6 +12364,9 @@ static void bnx2x_remove_one(struct pci_dev *pdev)

/* Make sure RESET task is not scheduled before continuing */
cancel_delayed_work_sync(&bp->sp_rtnl_task);
+ /* send message via vfpf channel to release the resources of this vf */
+ if (IS_VF(bp))
+ bnx2x_vfpf_release(bp);

if (bp->regview)
iounmap(bp->regview);
@@ -13345,3 +13348,45 @@ int bnx2x_vfpf_acquire(struct bnx2x *bp, u8 tx_count, u8 rx_count)

return 0;
}
+
+int bnx2x_vfpf_release(struct bnx2x *bp)
+{
+ struct vfpf_release_tlv *req = &bp->vf2pf_mbox->req.release;
+ struct pfvf_general_resp_tlv *resp = &bp->vf2pf_mbox->resp.general_resp;
+ u32 rc = 0, vf_id;
+
+ /* clear mailbox and prep first tlv */
+ bnx2x_vfpf_prep(bp, &req->first_tlv, CHANNEL_TLV_RELEASE, sizeof(*req));
+
+ if (bnx2x_get_vf_id(bp, &vf_id))
+ return -EAGAIN;
+
+ req->vf_id = vf_id;
+
+ /* add list termination tlv */
+ bnx2x_add_tlv(bp, req, req->first_tlv.tl.length, CHANNEL_TLV_LIST_END,
+ sizeof(struct channel_list_end_tlv));
+
+ /* output tlvs list */
+ bnx2x_dp_tlv_list(bp, req);
+
+ /* send release request */
+ rc = bnx2x_send_msg2pf(bp, &resp->hdr.status, bp->vf2pf_mbox_mapping);
+
+ /* PF timeout */
+ if (rc)
+ return rc;
+
+ /* PF released us */
+ if (resp->hdr.status == PFVF_STATUS_SUCCESS) {
+ DP(BNX2X_MSG_SP, "vf released\n");
+
+ /* PF reports error */
+ } else {
+ BNX2X_ERR("PF failed our release request - are we out of sync? response status: %d\n",
+ resp->hdr.status);
+ return -EAGAIN;
+ }
+
+ return 0;
+}
diff --git a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h
index f201a53..763d1c2 100644
--- a/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h
+++ b/drivers/net/ethernet/broadcom/bnx2x/bnx2x_vfpf.h
@@ -68,6 +68,10 @@ struct pfvf_tlv {
u8 padding[3];
};

+/* response tlv used for most tlvs */
+struct pfvf_general_resp_tlv {
+ struct pfvf_tlv hdr;
+};
/* used to terminate and pad a tlv list */
struct channel_list_end_tlv {
struct channel_tlv tl;
@@ -125,6 +129,13 @@ struct pfvf_acquire_resp_tlv {
} resc;
};

+/* release the VF's acquired resources */
+struct vfpf_release_tlv {
+ struct vfpf_first_tlv first_tlv;
+ u16 vf_id;
+ u8 padding[2];
+};
+
struct tlv_buffer_size {
u8 tlv_buffer[TLV_BUFFER_SIZE];
};
@@ -132,11 +143,13 @@ struct tlv_buffer_size {
union vfpf_tlvs {
struct vfpf_first_tlv first_tlv;
struct vfpf_acquire_tlv acquire;
+ struct vfpf_release_tlv release;
struct channel_list_end_tlv list_end;
struct tlv_buffer_size tlv_buf_size;
};

union pfvf_tlvs {
+ struct pfvf_general_resp_tlv general_resp;
struct pfvf_acquire_resp_tlv acquire_resp;
struct channel_list_end_tlv list_end;
struct tlv_buffer_size tlv_buf_size;
@@ -145,8 +158,9 @@ union pfvf_tlvs {
#define MAX_TLVS_IN_LIST 50

enum channel_tlvs {
- CHANNEL_TLV_NONE, /* ends tlv sequence */
+ CHANNEL_TLV_NONE,
CHANNEL_TLV_ACQUIRE,
+ CHANNEL_TLV_RELEASE,
CHANNEL_TLV_LIST_END,
CHANNEL_TLV_MAX
};
--
1.7.9.GIT