mirror of https://github.com/hak5/openwrt.git
90 lines
3.1 KiB
Diff
90 lines
3.1 KiB
Diff
From 8c4cdce8b1ab044a2ee1d86d5a086f67e32b3c10 Mon Sep 17 00:00:00 2001
|
|
From: Abhishek Sahu <absahu@codeaurora.org>
|
|
Date: Mon, 25 Sep 2017 13:21:25 +0530
|
|
Subject: [PATCH 2/7] mtd: nand: qcom: add command elements in BAM transaction
|
|
|
|
All the QPIC register read/write through BAM DMA requires
|
|
command descriptor which contains the array of command elements.
|
|
|
|
Reviewed-by: Archit Taneja <architt@codeaurora.org>
|
|
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org>
|
|
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
|
|
---
|
|
drivers/mtd/nand/qcom_nandc.c | 19 ++++++++++++++++++-
|
|
1 file changed, 18 insertions(+), 1 deletion(-)
|
|
|
|
--- a/drivers/mtd/nand/qcom_nandc.c
|
|
+++ b/drivers/mtd/nand/qcom_nandc.c
|
|
@@ -22,6 +22,7 @@
|
|
#include <linux/of.h>
|
|
#include <linux/of_device.h>
|
|
#include <linux/delay.h>
|
|
+#include <linux/dma/qcom_bam_dma.h>
|
|
|
|
/* NANDc reg offsets */
|
|
#define NAND_FLASH_CMD 0x00
|
|
@@ -199,6 +200,7 @@ nandc_set_reg(nandc, NAND_READ_LOCATION_
|
|
*/
|
|
#define dev_cmd_reg_addr(nandc, reg) ((nandc)->props->dev_cmd_reg_start + (reg))
|
|
|
|
+#define QPIC_PER_CW_CMD_ELEMENTS 32
|
|
#define QPIC_PER_CW_CMD_SGL 32
|
|
#define QPIC_PER_CW_DATA_SGL 8
|
|
|
|
@@ -221,8 +223,13 @@ nandc_set_reg(nandc, NAND_READ_LOCATION_
|
|
/*
|
|
* This data type corresponds to the BAM transaction which will be used for all
|
|
* NAND transfers.
|
|
+ * @bam_ce - the array of BAM command elements
|
|
* @cmd_sgl - sgl for NAND BAM command pipe
|
|
* @data_sgl - sgl for NAND BAM consumer/producer pipe
|
|
+ * @bam_ce_pos - the index in bam_ce which is available for next sgl
|
|
+ * @bam_ce_start - the index in bam_ce which marks the start position ce
|
|
+ * for current sgl. It will be used for size calculation
|
|
+ * for current sgl
|
|
* @cmd_sgl_pos - current index in command sgl.
|
|
* @cmd_sgl_start - start index in command sgl.
|
|
* @tx_sgl_pos - current index in data sgl for tx.
|
|
@@ -231,8 +238,11 @@ nandc_set_reg(nandc, NAND_READ_LOCATION_
|
|
* @rx_sgl_start - start index in data sgl for rx.
|
|
*/
|
|
struct bam_transaction {
|
|
+ struct bam_cmd_element *bam_ce;
|
|
struct scatterlist *cmd_sgl;
|
|
struct scatterlist *data_sgl;
|
|
+ u32 bam_ce_pos;
|
|
+ u32 bam_ce_start;
|
|
u32 cmd_sgl_pos;
|
|
u32 cmd_sgl_start;
|
|
u32 tx_sgl_pos;
|
|
@@ -462,7 +472,8 @@ alloc_bam_transaction(struct qcom_nand_c
|
|
|
|
bam_txn_size =
|
|
sizeof(*bam_txn) + num_cw *
|
|
- ((sizeof(*bam_txn->cmd_sgl) * QPIC_PER_CW_CMD_SGL) +
|
|
+ ((sizeof(*bam_txn->bam_ce) * QPIC_PER_CW_CMD_ELEMENTS) +
|
|
+ (sizeof(*bam_txn->cmd_sgl) * QPIC_PER_CW_CMD_SGL) +
|
|
(sizeof(*bam_txn->data_sgl) * QPIC_PER_CW_DATA_SGL));
|
|
|
|
bam_txn_buf = devm_kzalloc(nandc->dev, bam_txn_size, GFP_KERNEL);
|
|
@@ -472,6 +483,10 @@ alloc_bam_transaction(struct qcom_nand_c
|
|
bam_txn = bam_txn_buf;
|
|
bam_txn_buf += sizeof(*bam_txn);
|
|
|
|
+ bam_txn->bam_ce = bam_txn_buf;
|
|
+ bam_txn_buf +=
|
|
+ sizeof(*bam_txn->bam_ce) * QPIC_PER_CW_CMD_ELEMENTS * num_cw;
|
|
+
|
|
bam_txn->cmd_sgl = bam_txn_buf;
|
|
bam_txn_buf +=
|
|
sizeof(*bam_txn->cmd_sgl) * QPIC_PER_CW_CMD_SGL * num_cw;
|
|
@@ -489,6 +504,8 @@ static void clear_bam_transaction(struct
|
|
if (!nandc->props->is_bam)
|
|
return;
|
|
|
|
+ bam_txn->bam_ce_pos = 0;
|
|
+ bam_txn->bam_ce_start = 0;
|
|
bam_txn->cmd_sgl_pos = 0;
|
|
bam_txn->cmd_sgl_start = 0;
|
|
bam_txn->tx_sgl_pos = 0;
|