soc: fsl: qbman: add APIs to retrieve the probing status

Add a couple of new APIs to check the probing status of qman and bman:
 'int bman_is_probed()' and 'int qman_is_probed()'.
They return the following values.
 *  1 if qman/bman were probed correctly
 *  0 if qman/bman were not yet probed
 * -1 if probing of qman/bman failed
Drivers that use qman/bman driver services are required to use these
APIs before calling any functions exported by qman or bman drivers
or otherwise they will crash the kernel.
The APIs will be used in the following couple of qbman portal patches
and later in the series in the dpaa1 ethernet driver.

Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Li Yang <leoyang.li@nxp.com>

diff --git a/drivers/soc/fsl/qbman/bman_ccsr.c b/drivers/soc/fsl/qbman/bman_ccsr.c
index 05c42235dd41de138ebde5b5fce9289ae5a5b4bc..7c3cc968053cd1ddac6230765d6580227e7ee70a 100644 (file)
--- a/drivers/soc/fsl/qbman/bman_ccsr.c
+++ b/drivers/soc/fsl/qbman/bman_ccsr.c
@@ -120,6 +120,7 @@ static void bm_set_memory(u64 ba, u32 size)
  */
 static dma_addr_t fbpr_a;
 static size_t fbpr_sz;
+static int __bman_probed;
 
 static int bman_fbpr(struct reserved_mem *rmem)
 {
@@ -166,6 +167,12 @@ static irqreturn_t bman_isr(int irq, void *ptr)
        return IRQ_HANDLED;
 }
 
+int bman_is_probed(void)
+{
+       return __bman_probed;
+}
+EXPORT_SYMBOL_GPL(bman_is_probed);
+
 static int fsl_bman_probe(struct platform_device *pdev)
 {
        int ret, err_irq;
@@ -175,6 +182,8 @@ static int fsl_bman_probe(struct platform_device *pdev)
        u16 id, bm_pool_cnt;
        u8 major, minor;
 
+       __bman_probed = -1;
+
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res) {
                dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n",
@@ -255,6 +264,8 @@ static int fsl_bman_probe(struct platform_device *pdev)
                return ret;
        }
 
+       __bman_probed = 1;
+
        return 0;
 };
 

diff --git a/drivers/soc/fsl/qbman/qman_ccsr.c b/drivers/soc/fsl/qbman/qman_ccsr.c
index 79cba58387a58f7ebcf19861a9fffcc56cc2c490..6fd5fef5f39b361039397fec94b456ab426aeb5a 100644 (file)
--- a/drivers/soc/fsl/qbman/qman_ccsr.c
+++ b/drivers/soc/fsl/qbman/qman_ccsr.c
@@ -273,6 +273,7 @@ static const struct qman_error_info_mdata error_mdata[] = {
 static u32 __iomem *qm_ccsr_start;
 /* A SDQCR mask comprising all the available/visible pool channels */
 static u32 qm_pools_sdqcr;
+static int __qman_probed;
 
 static inline u32 qm_ccsr_in(u32 offset)
 {
@@ -686,6 +687,12 @@ static int qman_resource_init(struct device *dev)
        return 0;
 }
 
+int qman_is_probed(void)
+{
+       return __qman_probed;
+}
+EXPORT_SYMBOL_GPL(qman_is_probed);
+
 static int fsl_qman_probe(struct platform_device *pdev)
 {
        struct device *dev = &pdev->dev;
@@ -695,6 +702,8 @@ static int fsl_qman_probe(struct platform_device *pdev)
        u16 id;
        u8 major, minor;
 
+       __qman_probed = -1;
+
        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
        if (!res) {
                dev_err(dev, "Can't get %pOF property 'IORESOURCE_MEM'\n",
@@ -828,6 +837,8 @@ static int fsl_qman_probe(struct platform_device *pdev)
        if (ret)
                return ret;
 
+       __qman_probed = 1;
+
        return 0;
 }
 

diff --git a/include/soc/fsl/bman.h b/include/soc/fsl/bman.h
index eaaf56df4086e8453bfdb76244b6036d6bc7943d..5b99cb2ea5ef900b3799c3e9d37474f2788c15d1 100644 (file)
--- a/include/soc/fsl/bman.h
+++ b/include/soc/fsl/bman.h
@@ -126,4 +126,12 @@ int bman_release(struct bman_pool *pool, const struct bm_buffer *bufs, u8 num);
  */
 int bman_acquire(struct bman_pool *pool, struct bm_buffer *bufs, u8 num);
 
+/**
+ * bman_is_probed - Check if bman is probed
+ *
+ * Returns 1 if the bman driver successfully probed, -1 if the bman driver
+ * failed to probe or 0 if the bman driver did not probed yet.
+ */
+int bman_is_probed(void);
+
 #endif /* __FSL_BMAN_H */

diff --git a/include/soc/fsl/qman.h b/include/soc/fsl/qman.h
index d4dfefdee6c10dfb607642e3a0c773144b08cd16..597783b8a3a074e758ddff99adaabe42cbe85b2b 100644 (file)
--- a/include/soc/fsl/qman.h
+++ b/include/soc/fsl/qman.h
@@ -1186,4 +1186,12 @@ int qman_alloc_cgrid_range(u32 *result, u32 count);
  */
 int qman_release_cgrid(u32 id);
 
+/**
+ * qman_is_probed - Check if qman is probed
+ *
+ * Returns 1 if the qman driver successfully probed, -1 if the qman driver
+ * failed to probe or 0 if the qman driver did not probed yet.
+ */
+int qman_is_probed(void);
+
 #endif /* __FSL_QMAN_H */