From: Jingjing Wu <jingjing.wu@intel.com>
Date: Sun, 6 Sep 2015 07:11:44 +0000 (+0800)
Subject: i40e/base: support pre-allocated pages for pd
X-Git-Tag: spdx-start~8431
X-Git-Url: http://git.droids-corp.org/?a=commitdiff_plain;h=4d7fa8714f204bd23c045b7cb86fd1a77cfeab10;p=dpdk.git

i40e/base: support pre-allocated pages for pd

The i40e_add_pd_table_entry() routine is being modified to handle both
cases where a backing page is passed and where backing page is allocated
in i40e_add_pd_table_entry().

For pble resource management, it is more efficient for it to manage its
backing pages. For VF, pble backing page addresses will be send to PF
driver for pble resource.

The i40e_remove_pd_bp() is also modified to not free pre-allocated pages and
free only ones which were allocated in i40e_add_pd_table_entry().

Signed-off-by: Jingjing Wu <jingjing.wu@intel.com>
Acked-by: Helin Zhang <helin.zhang@intel.com>
Tested-by: Huilong Xu <huilongx.xu@intel.com>
---

diff --git a/drivers/net/i40e/base/i40e_hmc.c b/drivers/net/i40e/base/i40e_hmc.c
index 3b29251559..75d38412c4 100644
--- a/drivers/net/i40e/base/i40e_hmc.c
+++ b/drivers/net/i40e/base/i40e_hmc.c
@@ -127,6 +127,7 @@ exit:
  * @hw: pointer to our HW structure
  * @hmc_info: pointer to the HMC configuration information structure
  * @pd_index: which page descriptor index to manipulate
+ * @rsrc_pg: if not NULL, use preallocated page instead of allocating new one.
  *
  * This function:
  *	1. Initializes the pd entry
@@ -140,12 +141,14 @@ exit:
  **/
 enum i40e_status_code i40e_add_pd_table_entry(struct i40e_hw *hw,
 					      struct i40e_hmc_info *hmc_info,
-					      u32 pd_index)
+					      u32 pd_index,
+					      struct i40e_dma_mem *rsrc_pg)
 {
 	enum i40e_status_code ret_code = I40E_SUCCESS;
 	struct i40e_hmc_pd_table *pd_table;
 	struct i40e_hmc_pd_entry *pd_entry;
 	struct i40e_dma_mem mem;
+	struct i40e_dma_mem *page = &mem;
 	u32 sd_idx, rel_pd_idx;
 	u64 *pd_addr;
 	u64 page_desc;
@@ -166,19 +169,25 @@ enum i40e_status_code i40e_add_pd_table_entry(struct i40e_hw *hw,
 	pd_table = &hmc_info->sd_table.sd_entry[sd_idx].u.pd_table;
 	pd_entry = &pd_table->pd_entry[rel_pd_idx];
 	if (!pd_entry->valid) {
-		/* allocate a 4K backing page */
-		ret_code = i40e_allocate_dma_mem(hw, &mem, i40e_mem_bp,
-						 I40E_HMC_PAGED_BP_SIZE,
-						 I40E_HMC_PD_BP_BUF_ALIGNMENT);
-		if (ret_code)
-			goto exit;
+		if (rsrc_pg) {
+			pd_entry->rsrc_pg = true;
+			page = rsrc_pg;
+		} else {
+			/* allocate a 4K backing page */
+			ret_code = i40e_allocate_dma_mem(hw, page, i40e_mem_bp,
+						I40E_HMC_PAGED_BP_SIZE,
+						I40E_HMC_PD_BP_BUF_ALIGNMENT);
+			if (ret_code)
+				goto exit;
+			pd_entry->rsrc_pg = false;
+		}
 
-		i40e_memcpy(&pd_entry->bp.addr, &mem,
+		i40e_memcpy(&pd_entry->bp.addr, page,
 			    sizeof(struct i40e_dma_mem), I40E_NONDMA_TO_NONDMA);
 		pd_entry->bp.sd_pd_index = pd_index;
 		pd_entry->bp.entry_type = I40E_SD_TYPE_PAGED;
 		/* Set page address and valid bit */
-		page_desc = mem.pa | 0x1;
+		page_desc = page->pa | 0x1;
 
 		pd_addr = (u64 *)pd_table->pd_page_addr.va;
 		pd_addr += rel_pd_idx;
@@ -253,7 +262,8 @@ enum i40e_status_code i40e_remove_pd_bp(struct i40e_hw *hw,
 	I40E_INVALIDATE_PF_HMC_PD(hw, sd_idx, idx);
 
 	/* free memory here */
-	ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr));
+	if (!pd_entry->rsrc_pg)
+		ret_code = i40e_free_dma_mem(hw, &(pd_entry->bp.addr));
 	if (I40E_SUCCESS != ret_code)
 		goto exit;
 	if (!pd_table->ref_cnt)
diff --git a/drivers/net/i40e/base/i40e_hmc.h b/drivers/net/i40e/base/i40e_hmc.h
index c2cdc92381..343b251fa0 100644
--- a/drivers/net/i40e/base/i40e_hmc.h
+++ b/drivers/net/i40e/base/i40e_hmc.h
@@ -69,6 +69,7 @@ struct i40e_hmc_bp {
 struct i40e_hmc_pd_entry {
 	struct i40e_hmc_bp bp;
 	u32 sd_index;
+	bool rsrc_pg;
 	bool valid;
 };
 
@@ -225,7 +226,8 @@ enum i40e_status_code i40e_add_sd_table_entry(struct i40e_hw *hw,
 
 enum i40e_status_code i40e_add_pd_table_entry(struct i40e_hw *hw,
 					      struct i40e_hmc_info *hmc_info,
-					      u32 pd_index);
+					      u32 pd_index,
+					      struct i40e_dma_mem *rsrc_pg);
 enum i40e_status_code i40e_remove_pd_bp(struct i40e_hw *hw,
 					struct i40e_hmc_info *hmc_info,
 					u32 idx);
diff --git a/drivers/net/i40e/base/i40e_lan_hmc.c b/drivers/net/i40e/base/i40e_lan_hmc.c
index 3c717d2a46..651176718c 100644
--- a/drivers/net/i40e/base/i40e_lan_hmc.c
+++ b/drivers/net/i40e/base/i40e_lan_hmc.c
@@ -394,7 +394,7 @@ enum i40e_status_code i40e_create_lan_hmc_object(struct i40e_hw *hw,
 				/* update the pd table entry */
 				ret_code = i40e_add_pd_table_entry(hw,
 								info->hmc_info,
-								i);
+								i, NULL);
 				if (I40E_SUCCESS != ret_code) {
 					pd_error = true;
 					break;