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

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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 <[email protected]>
Signed-off-by: Li Yang <[email protected]>
This commit is contained in:
Laurentiu Tudor 2018-09-26 16:22:30 +03:00 • committed by Li Yang
commit 853dc104e6
4 changed files with 38 additions and 0 deletions
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11
drivers/soc/fsl/qbman/bman_ccsr.c
View file

@ -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;
};

11
drivers/soc/fsl/qbman/qman_ccsr.c
View file

@ -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;
}