[PATCH 11/18] common/idpf: allocate static buffer at initialization

[Wenjing Qiao]

Some OSs don't allow allocating DMA memory at runtime. So create an
initial static buffer at initialization to hold this data.

Signed-off-by: Christopher Pau <christopher....@intel.com>
Signed-off-by: Wenjing Qiao <wenjing.q...@intel.com>
---
 drivers/common/idpf/base/idpf_common.c | 26 +++++++++++++++-----------
 1 file changed, 15 insertions(+), 11 deletions(-)

diff --git a/drivers/common/idpf/base/idpf_common.c 
b/drivers/common/idpf/base/idpf_common.c
index de82c3458f..f4a5707272 100644
--- a/drivers/common/idpf/base/idpf_common.c
+++ b/drivers/common/idpf/base/idpf_common.c
@@ -6,6 +6,7 @@
 #include "idpf_prototype.h"
 #include "virtchnl.h"
 
+struct idpf_dma_mem send_dma_mem = { 0 };
 
 /**
  * idpf_set_mac_type - Sets MAC type
@@ -132,6 +133,15 @@ int idpf_init_hw(struct idpf_hw *hw, struct idpf_ctlq_size 
ctlq_size)
 
        idpf_free(hw, q_info);
 
+       /*
+        * Need an initial static buffer to copy DMA memory to send
+        * for drivers that do not allow this allocation at runtime
+        */
+       send_dma_mem.va = (struct idpf_dma_mem *)
+               idpf_alloc_dma_mem(hw, &send_dma_mem, 4096);
+       if (!send_dma_mem.va)
+               return -ENOMEM;
+
        return 0;
 }
 
@@ -152,7 +162,6 @@ int idpf_send_msg_to_cp(struct idpf_hw *hw, int v_opcode,
                        int v_retval, u8 *msg, u16 msglen)
 {
        struct idpf_ctlq_msg ctlq_msg = { 0 };
-       struct idpf_dma_mem dma_mem = { 0 };
        int status;
 
        ctlq_msg.opcode = idpf_mbq_opc_send_msg_to_pf;
@@ -162,19 +171,11 @@ int idpf_send_msg_to_cp(struct idpf_hw *hw, int v_opcode,
        ctlq_msg.cookie.mbx.chnl_opcode = v_opcode;
 
        if (msglen > 0) {
-               dma_mem.va = (struct idpf_dma_mem *)
-                         idpf_alloc_dma_mem(hw, &dma_mem, msglen);
-               if (!dma_mem.va)
-                       return -ENOMEM;
-
-               idpf_memcpy(dma_mem.va, msg, msglen, IDPF_NONDMA_TO_DMA);
-               ctlq_msg.ctx.indirect.payload = &dma_mem;
+               idpf_memcpy(send_dma_mem.va, msg, msglen, IDPF_NONDMA_TO_DMA);
+               ctlq_msg.ctx.indirect.payload = &send_dma_mem;
        }
        status = idpf_ctlq_send(hw, hw->asq, 1, &ctlq_msg);
 
-       if (dma_mem.va)
-               idpf_free_dma_mem(hw, &dma_mem);
-
        return status;
 }
 
@@ -262,6 +263,9 @@ int idpf_clean_arq_element(struct idpf_hw *hw,
  */
 int idpf_deinit_hw(struct idpf_hw *hw)
 {
+       if (send_dma_mem.va)
+               idpf_free_dma_mem(hw, &send_dma_mem);
+
        hw->asq = NULL;
        hw->arq = NULL;
 
-- 
2.25.1