From: Cheng Xu <chengyou@linux.alibaba.com>
Date: Wed, 22 Mar 2023 09:33:19 +0000 (+0800)
Subject: RDMA/erdma: Minor refactor of device init flow
X-Git-Tag: v6.6.17~4961^2~62
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=901d9d62416baec3979fd9d768249b8a9e8e56ee;p=platform%2Fkernel%2Flinux-rpi.git

RDMA/erdma: Minor refactor of device init flow

After necessary configuration, driver should wait hardware finishing
initialization. The wait sets at CMDQ related function though it has
nothing to do with CMDQ. Refactor this part to make code cleaner.

Signed-off-by: Cheng Xu <chengyou@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230322093319.84045-4-chengyou@linux.alibaba.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
---

diff --git a/drivers/infiniband/hw/erdma/erdma_cmdq.c b/drivers/infiniband/hw/erdma/erdma_cmdq.c
index eb6aaf7..a151a7b 100644
--- a/drivers/infiniband/hw/erdma/erdma_cmdq.c
+++ b/drivers/infiniband/hw/erdma/erdma_cmdq.c
@@ -182,9 +182,8 @@ static int erdma_cmdq_eq_init(struct erdma_dev *dev)
 
 int erdma_cmdq_init(struct erdma_dev *dev)
 {
-	int err, i;
 	struct erdma_cmdq *cmdq = &dev->cmdq;
-	u32 sts, ctrl;
+	int err;
 
 	cmdq->max_outstandings = ERDMA_CMDQ_MAX_OUTSTANDING;
 	cmdq->use_event = false;
@@ -207,34 +206,10 @@ int erdma_cmdq_init(struct erdma_dev *dev)
 	if (err)
 		goto err_destroy_cq;
 
-	ctrl = FIELD_PREP(ERDMA_REG_DEV_CTRL_INIT_MASK, 1);
-	erdma_reg_write32(dev, ERDMA_REGS_DEV_CTRL_REG, ctrl);
-
-	for (i = 0; i < ERDMA_WAIT_DEV_DONE_CNT; i++) {
-		sts = erdma_reg_read32_filed(dev, ERDMA_REGS_DEV_ST_REG,
-					     ERDMA_REG_DEV_ST_INIT_DONE_MASK);
-		if (sts)
-			break;
-
-		msleep(ERDMA_REG_ACCESS_WAIT_MS);
-	}
-
-	if (i == ERDMA_WAIT_DEV_DONE_CNT) {
-		dev_err(&dev->pdev->dev, "wait init done failed.\n");
-		err = -ETIMEDOUT;
-		goto err_destroy_eq;
-	}
-
 	set_bit(ERDMA_CMDQ_STATE_OK_BIT, &cmdq->state);
 
 	return 0;
 
-err_destroy_eq:
-	dma_free_coherent(&dev->pdev->dev,
-			  (cmdq->eq.depth << EQE_SHIFT) +
-				  ERDMA_EXTRA_BUFFER_SIZE,
-			  cmdq->eq.qbuf, cmdq->eq.qbuf_dma_addr);
-
 err_destroy_cq:
 	dma_free_coherent(&dev->pdev->dev,
 			  (cmdq->cq.depth << CQE_SHIFT) +
diff --git a/drivers/infiniband/hw/erdma/erdma_main.c b/drivers/infiniband/hw/erdma/erdma_main.c
index 5dc31e5..2c8fd00 100644
--- a/drivers/infiniband/hw/erdma/erdma_main.c
+++ b/drivers/infiniband/hw/erdma/erdma_main.c
@@ -211,13 +211,36 @@ static int erdma_device_init(struct erdma_dev *dev, struct pci_dev *pdev)
 	return 0;
 }
 
-static void erdma_device_uninit(struct erdma_dev *dev)
+static void erdma_hw_reset(struct erdma_dev *dev)
 {
 	u32 ctrl = FIELD_PREP(ERDMA_REG_DEV_CTRL_RESET_MASK, 1);
 
 	erdma_reg_write32(dev, ERDMA_REGS_DEV_CTRL_REG, ctrl);
 }
 
+static int erdma_wait_hw_init_done(struct erdma_dev *dev)
+{
+	int i;
+
+	erdma_reg_write32(dev, ERDMA_REGS_DEV_CTRL_REG,
+			  FIELD_PREP(ERDMA_REG_DEV_CTRL_INIT_MASK, 1));
+
+	for (i = 0; i < ERDMA_WAIT_DEV_DONE_CNT; i++) {
+		if (erdma_reg_read32_filed(dev, ERDMA_REGS_DEV_ST_REG,
+					   ERDMA_REG_DEV_ST_INIT_DONE_MASK))
+			break;
+
+		msleep(ERDMA_REG_ACCESS_WAIT_MS);
+	}
+
+	if (i == ERDMA_WAIT_DEV_DONE_CNT) {
+		dev_err(&dev->pdev->dev, "wait init done failed.\n");
+		return -ETIMEDOUT;
+	}
+
+	return 0;
+}
+
 static const struct pci_device_id erdma_pci_tbl[] = {
 	{ PCI_DEVICE(PCI_VENDOR_ID_ALIBABA, 0x107f) },
 	{}
@@ -293,16 +316,22 @@ static int erdma_probe_dev(struct pci_dev *pdev)
 	if (err)
 		goto err_uninit_aeq;
 
-	err = erdma_ceqs_init(dev);
+	err = erdma_wait_hw_init_done(dev);
 	if (err)
 		goto err_uninit_cmdq;
 
+	err = erdma_ceqs_init(dev);
+	if (err)
+		goto err_reset_hw;
+
 	erdma_finish_cmdq_init(dev);
 
 	return 0;
 
+err_reset_hw:
+	erdma_hw_reset(dev);
+
 err_uninit_cmdq:
-	erdma_device_uninit(dev);
 	erdma_cmdq_destroy(dev);
 
 err_uninit_aeq:
@@ -334,9 +363,7 @@ static void erdma_remove_dev(struct pci_dev *pdev)
 	struct erdma_dev *dev = pci_get_drvdata(pdev);
 
 	erdma_ceqs_uninit(dev);
-
-	erdma_device_uninit(dev);
-
+	erdma_hw_reset(dev);
 	erdma_cmdq_destroy(dev);
 	erdma_aeq_destroy(dev);
 	erdma_comm_irq_uninit(dev);