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Message-ID: <1496848826-20534-9-git-send-email-john.garry@huawei.com>
Date: Wed, 7 Jun 2017 23:20:11 +0800
From: John Garry <john.garry@...wei.com>
To: <martin.petersen@...cle.com>, <jejb@...ux.vnet.ibm.com>
CC: <linuxarm@...wei.com>, <arnd@...db.de>,
<linux-scsi@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<hch@...radead.org>, John Garry <john.garry@...wei.com>
Subject: [PATCH v4 08/23] scsi: hisi_sas: create hisi_sas_get_fw_info()
Move the functionality to retrieve the fw info into
a dedicated device type-agnostic function,
hisi_sas_get_fw_info().
The reasoning is that this function will be required
for future pci-based platforms.
Also add some debug logs for failure.
Signed-off-by: John Garry <john.garry@...wei.com>
---
drivers/scsi/hisi_sas/hisi_sas.h | 1 +
drivers/scsi/hisi_sas/hisi_sas_main.c | 107 ++++++++++++++++++++++------------
2 files changed, 71 insertions(+), 37 deletions(-)
diff --git a/drivers/scsi/hisi_sas/hisi_sas.h b/drivers/scsi/hisi_sas/hisi_sas.h
index 84cac98..c1f6669 100644
--- a/drivers/scsi/hisi_sas/hisi_sas.h
+++ b/drivers/scsi/hisi_sas/hisi_sas.h
@@ -371,6 +371,7 @@ struct hisi_sas_command_table_ssp {
extern void hisi_sas_sata_done(struct sas_task *task,
struct hisi_sas_slot *slot);
extern int hisi_sas_get_ncq_tag(struct sas_task *task, u32 *tag);
+extern int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba);
extern int hisi_sas_probe(struct platform_device *pdev,
const struct hisi_sas_hw *ops);
extern int hisi_sas_remove(struct platform_device *pdev);
diff --git a/drivers/scsi/hisi_sas/hisi_sas_main.c b/drivers/scsi/hisi_sas/hisi_sas_main.c
index ff033bd..1a6adf7 100644
--- a/drivers/scsi/hisi_sas/hisi_sas_main.c
+++ b/drivers/scsi/hisi_sas/hisi_sas_main.c
@@ -1725,66 +1725,99 @@ static void hisi_sas_rst_work_handler(struct work_struct *work)
hisi_sas_controller_reset(hisi_hba);
}
-static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
- const struct hisi_sas_hw *hw)
+int hisi_sas_get_fw_info(struct hisi_hba *hisi_hba)
{
- struct resource *res;
- struct Scsi_Host *shost;
- struct hisi_hba *hisi_hba;
- struct device *dev = &pdev->dev;
- struct device_node *np = pdev->dev.of_node;
+ struct device *dev = hisi_hba->dev;
+ struct platform_device *pdev = hisi_hba->platform_dev;
+ struct device_node *np = pdev ? pdev->dev.of_node : NULL;
struct clk *refclk;
- shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
- if (!shost) {
- dev_err(dev, "scsi host alloc failed\n");
- return NULL;
- }
- hisi_hba = shost_priv(shost);
-
- INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
- hisi_hba->hw = hw;
- hisi_hba->platform_dev = pdev;
- hisi_hba->dev = dev;
- hisi_hba->shost = shost;
- SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
-
- init_timer(&hisi_hba->timer);
-
if (device_property_read_u8_array(dev, "sas-addr", hisi_hba->sas_addr,
- SAS_ADDR_SIZE))
- goto err_out;
+ SAS_ADDR_SIZE)) {
+ dev_err(dev, "could not get property sas-addr\n");
+ return -ENOENT;
+ }
if (np) {
+ /*
+ * These properties are only required for platform device-based
+ * controller with DT firmware.
+ */
hisi_hba->ctrl = syscon_regmap_lookup_by_phandle(np,
"hisilicon,sas-syscon");
- if (IS_ERR(hisi_hba->ctrl))
- goto err_out;
+ if (IS_ERR(hisi_hba->ctrl)) {
+ dev_err(dev, "could not get syscon\n");
+ return -ENOENT;
+ }
if (device_property_read_u32(dev, "ctrl-reset-reg",
- &hisi_hba->ctrl_reset_reg))
- goto err_out;
+ &hisi_hba->ctrl_reset_reg)) {
+ dev_err(dev,
+ "could not get property ctrl-reset-reg\n");
+ return -ENOENT;
+ }
if (device_property_read_u32(dev, "ctrl-reset-sts-reg",
- &hisi_hba->ctrl_reset_sts_reg))
- goto err_out;
+ &hisi_hba->ctrl_reset_sts_reg)) {
+ dev_err(dev,
+ "could not get property ctrl-reset-sts-reg\n");
+ return -ENOENT;
+ }
if (device_property_read_u32(dev, "ctrl-clock-ena-reg",
- &hisi_hba->ctrl_clock_ena_reg))
- goto err_out;
+ &hisi_hba->ctrl_clock_ena_reg)) {
+ dev_err(dev,
+ "could not get property ctrl-clock-ena-reg\n");
+ return -ENOENT;
+ }
}
- refclk = devm_clk_get(&pdev->dev, NULL);
+ refclk = devm_clk_get(dev, NULL);
if (IS_ERR(refclk))
dev_dbg(dev, "no ref clk property\n");
else
hisi_hba->refclk_frequency_mhz = clk_get_rate(refclk) / 1000000;
- if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy))
- goto err_out;
+ if (device_property_read_u32(dev, "phy-count", &hisi_hba->n_phy)) {
+ dev_err(dev, "could not get property phy-count\n");
+ return -ENOENT;
+ }
if (device_property_read_u32(dev, "queue-count",
- &hisi_hba->queue_count))
+ &hisi_hba->queue_count)) {
+ dev_err(dev, "could not get property queue-count\n");
+ return -ENOENT;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(hisi_sas_get_fw_info);
+
+static struct Scsi_Host *hisi_sas_shost_alloc(struct platform_device *pdev,
+ const struct hisi_sas_hw *hw)
+{
+ struct resource *res;
+ struct Scsi_Host *shost;
+ struct hisi_hba *hisi_hba;
+ struct device *dev = &pdev->dev;
+
+ shost = scsi_host_alloc(&hisi_sas_sht, sizeof(*hisi_hba));
+ if (!shost) {
+ dev_err(dev, "scsi host alloc failed\n");
+ return NULL;
+ }
+ hisi_hba = shost_priv(shost);
+
+ INIT_WORK(&hisi_hba->rst_work, hisi_sas_rst_work_handler);
+ hisi_hba->hw = hw;
+ hisi_hba->dev = dev;
+ hisi_hba->platform_dev = pdev;
+ hisi_hba->shost = shost;
+ SHOST_TO_SAS_HA(shost) = &hisi_hba->sha;
+
+ init_timer(&hisi_hba->timer);
+
+ if (hisi_sas_get_fw_info(hisi_hba) < 0)
goto err_out;
if (dma_set_mask_and_coherent(dev, DMA_BIT_MASK(64)) &&
--
1.9.1
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