+/* Allocates and Initializes the BAM transaction */
+static struct bam_transaction *
+alloc_bam_transaction(struct qcom_nand_controller *nandc, unsigned
int
num_cw)
+{
+ struct bam_transaction *bam_txn;
+
+ bam_txn = devm_kzalloc(nandc->dev, sizeof(*bam_txn), GFP_KERNEL);
+
+ if (!bam_txn)
+ return NULL;
+
+ bam_txn->bam_ce =
+ devm_kzalloc(nandc->dev, sizeof(*bam_txn->bam_ce) *
+ num_cw * QPIC_PER_CW_MAX_CMD_ELEMENTS, GFP_KERNEL);
+ if (!bam_txn->bam_ce)
+ return NULL;
+
+ bam_txn->cmd_sgl =
+ devm_kzalloc(nandc->dev, sizeof(*bam_txn->cmd_sgl) * num_cw *
+ QPIC_PER_CW_MAX_CMD_SGL, GFP_KERNEL);
+ if (!bam_txn->cmd_sgl)
+ return NULL;
+
+ bam_txn->data_sg =
+ devm_kzalloc(nandc->dev, sizeof(*bam_txn->data_sg) *
+ num_cw * QPIC_PER_CW_MAX_DATA_SGL, GFP_KERNEL);
+ if (!bam_txn->data_sg)
+ return NULL;
+
+ nandc->max_cwperpage = num_cw;
+
+ return bam_txn;
+}
+
static inline struct qcom_nand_host *to_qcom_nand_host(struct
nand_chip
*chip)
{
return container_of(chip, struct qcom_nand_host, chip);
@@ -1868,6 +1958,8 @@ static int qcom_nand_host_setup(struct
qcom_nand_host *host)
mtd_set_ooblayout(mtd, &qcom_nand_ooblayout_ops);
cwperpage = mtd->writesize / ecc->size;
+ nandc->max_cwperpage = max_t(unsigned int, nandc->max_cwperpage,
+ cwperpage);
/*
* DATA_UD_BYTES varies based on whether the read/write command
protects
@@ -2010,6 +2102,19 @@ static int qcom_nandc_alloc(struct
qcom_nand_controller *nandc)
dev_err(nandc->dev, "failed to request cmd channel\n");
return -ENODEV;
}
+
+ /*
+ * Initially allocate BAM transaction to read ONFI param page.
+ * After detecting all the devices, this BAM transaction will
+ * be freed and the next BAM tranasction will be allocated with
+ * maximum codeword size
+ */
+ nandc->bam_txn = alloc_bam_transaction(nandc, 1);
+ if (!nandc->bam_txn) {
+ dev_err(nandc->dev,
+ "failed to allocate bam transaction\n");
+ return -ENOMEM;
+ }
}
INIT_LIST_HEAD(&nandc->desc_list);
@@ -2153,6 +2258,17 @@ static int qcom_probe_nand_devices(struct
qcom_nand_controller *nandc)
if (list_empty(&nandc->host_list))
return -ENODEV;
+ if (nandc->dma_bam_enabled) {
+ free_bam_transaction(nandc);
+ nandc->bam_txn = alloc_bam_transaction(nandc,
+ nandc->max_cwperpage);
