From: Matthew Gerlach <[email protected]>
In preparation of looking for dfls based on a vendor
specific pcie capability, move code that assumes
Bar0/offset0 as start of DFL to its own function.
Signed-off-by: Matthew Gerlach <[email protected]>
---
v3: no change
v2: remove spurious blank lines
rename find_dfl_in_bar0 to find_dfls_by_default
---
drivers/fpga/dfl-pci.c | 84 +++++++++++++++++++++++-------------------
1 file changed, 47 insertions(+), 37 deletions(-)
diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c
index a2203d03c9e2..b27fae045536 100644
--- a/drivers/fpga/dfl-pci.c
+++ b/drivers/fpga/dfl-pci.c
@@ -119,49 +119,20 @@ static int *cci_pci_create_irq_table(struct pci_dev *pcidev, unsigned int nvec)
return table;
}
-/* enumerate feature devices under pci device */
-static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
+static int find_dfls_by_default(struct pci_dev *pcidev,
+ struct dfl_fpga_enum_info *info)
{
- struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
- int port_num, bar, i, nvec, ret = 0;
- struct dfl_fpga_enum_info *info;
- struct dfl_fpga_cdev *cdev;
resource_size_t start, len;
+ int port_num, bar, i;
void __iomem *base;
- int *irq_table;
+ int ret = 0;
u32 offset;
u64 v;
- /* allocate enumeration info via pci_dev */
- info = dfl_fpga_enum_info_alloc(&pcidev->dev);
- if (!info)
- return -ENOMEM;
-
- /* add irq info for enumeration if the device support irq */
- nvec = cci_pci_alloc_irq(pcidev);
- if (nvec < 0) {
- dev_err(&pcidev->dev, "Fail to alloc irq %d.\n", nvec);
- ret = nvec;
- goto enum_info_free_exit;
- } else if (nvec) {
- irq_table = cci_pci_create_irq_table(pcidev, nvec);
- if (!irq_table) {
- ret = -ENOMEM;
- goto irq_free_exit;
- }
-
- ret = dfl_fpga_enum_info_add_irq(info, nvec, irq_table);
- kfree(irq_table);
- if (ret)
- goto irq_free_exit;
- }
-
- /* start to find Device Feature List in Bar 0 */
+ /* start to find Device Feature List from Bar 0 */
base = cci_pci_ioremap_bar0(pcidev);
- if (!base) {
- ret = -ENOMEM;
- goto irq_free_exit;
- }
+ if (!base)
+ return -ENOMEM;
/*
* PF device has FME and Ports/AFUs, and VF device only has one
@@ -208,12 +179,51 @@ static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
dfl_fpga_enum_info_add_dfl(info, start, len);
} else {
ret = -ENODEV;
- goto irq_free_exit;
}
/* release I/O mappings for next step enumeration */
pcim_iounmap_regions(pcidev, BIT(0));
+ return ret;
+}
+
+/* enumerate feature devices under pci device */
+static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
+{
+ struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
+ struct dfl_fpga_enum_info *info;
+ struct dfl_fpga_cdev *cdev;
+ int nvec, ret = 0;
+ int *irq_table;
+
+ /* allocate enumeration info via pci_dev */
+ info = dfl_fpga_enum_info_alloc(&pcidev->dev);
+ if (!info)
+ return -ENOMEM;
+
+ /* add irq info for enumeration if the device support irq */
+ nvec = cci_pci_alloc_irq(pcidev);
+ if (nvec < 0) {
+ dev_err(&pcidev->dev, "Fail to alloc irq %d.\n", nvec);
+ ret = nvec;
+ goto enum_info_free_exit;
+ } else if (nvec) {
+ irq_table = cci_pci_create_irq_table(pcidev, nvec);
+ if (!irq_table) {
+ ret = -ENOMEM;
+ goto irq_free_exit;
+ }
+
+ ret = dfl_fpga_enum_info_add_irq(info, nvec, irq_table);
+ kfree(irq_table);
+ if (ret)
+ goto irq_free_exit;
+ }
+
+ ret = find_dfls_by_default(pcidev, info);
+ if (ret)
+ goto irq_free_exit;
+
/* start enumeration with prepared enumeration information */
cdev = dfl_fpga_feature_devs_enumerate(info);
if (IS_ERR(cdev)) {
--
2.25.2
On Sat, 28 Nov 2020, Wu, Hao wrote:
>> Subject: [PATCH v3 1/2] fpga: dfl: refactor cci_enumerate_feature_devs()
>>
>> From: Matthew Gerlach <[email protected]>
>>
>> In preparation of looking for dfls based on a vendor
>> specific pcie capability, move code that assumes
>> Bar0/offset0 as start of DFL to its own function.
>
> as the default method to locate the first dfl.
>
How about the following?
In preparation of looking for dfls based on a vendor specific pci
capability, move the code for the default method of finding the first dfl
at offset 0 of Bar 0 to its own function.
>>
>> Signed-off-by: Matthew Gerlach <[email protected]>
>> ---
>> v3: no change
>>
>> v2: remove spurious blank lines
>> rename find_dfl_in_bar0 to find_dfls_by_default
>> ---
>> drivers/fpga/dfl-pci.c | 84 +++++++++++++++++++++++-------------------
>> 1 file changed, 47 insertions(+), 37 deletions(-)
>>
>> diff --git a/drivers/fpga/dfl-pci.c b/drivers/fpga/dfl-pci.c
>> index a2203d03c9e2..b27fae045536 100644
>> --- a/drivers/fpga/dfl-pci.c
>> +++ b/drivers/fpga/dfl-pci.c
>> @@ -119,49 +119,20 @@ static int *cci_pci_create_irq_table(struct pci_dev
>> *pcidev, unsigned int nvec)
>> return table;
>> }
>>
>> -/* enumerate feature devices under pci device */
>> -static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
>> +static int find_dfls_by_default(struct pci_dev *pcidev,
>> + struct dfl_fpga_enum_info *info)
>
> Please add one line comment to describe this is the default method
> is finding it in bar 0 and offset 0.
>
>> {
>> - struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
>> - int port_num, bar, i, nvec, ret = 0;
>> - struct dfl_fpga_enum_info *info;
>> - struct dfl_fpga_cdev *cdev;
>> resource_size_t start, len;
>> + int port_num, bar, i;
>> void __iomem *base;
>> - int *irq_table;
>> + int ret = 0;
>
> can be put into one line as previous code.
Ok, I can fix that.
>
> Other places look good to me.
>
> with above fixings,
> Acked-by: Wu Hao <[email protected]>
>
> Thanks
> Hao
>
>> u32 offset;
>> u64 v;
>>
>> - /* allocate enumeration info via pci_dev */
>> - info = dfl_fpga_enum_info_alloc(&pcidev->dev);
>> - if (!info)
>> - return -ENOMEM;
>> -
>> - /* add irq info for enumeration if the device support irq */
>> - nvec = cci_pci_alloc_irq(pcidev);
>> - if (nvec < 0) {
>> - dev_err(&pcidev->dev, "Fail to alloc irq %d.\n", nvec);
>> - ret = nvec;
>> - goto enum_info_free_exit;
>> - } else if (nvec) {
>> - irq_table = cci_pci_create_irq_table(pcidev, nvec);
>> - if (!irq_table) {
>> - ret = -ENOMEM;
>> - goto irq_free_exit;
>> - }
>> -
>> - ret = dfl_fpga_enum_info_add_irq(info, nvec, irq_table);
>> - kfree(irq_table);
>> - if (ret)
>> - goto irq_free_exit;
>> - }
>> -
>> - /* start to find Device Feature List in Bar 0 */
>> + /* start to find Device Feature List from Bar 0 */
>> base = cci_pci_ioremap_bar0(pcidev);
>> - if (!base) {
>> - ret = -ENOMEM;
>> - goto irq_free_exit;
>> - }
>> + if (!base)
>> + return -ENOMEM;
>>
>> /*
>> * PF device has FME and Ports/AFUs, and VF device only has one
>> @@ -208,12 +179,51 @@ static int cci_enumerate_feature_devs(struct
>> pci_dev *pcidev)
>> dfl_fpga_enum_info_add_dfl(info, start, len);
>> } else {
>> ret = -ENODEV;
>> - goto irq_free_exit;
>> }
>>
>> /* release I/O mappings for next step enumeration */
>> pcim_iounmap_regions(pcidev, BIT(0));
>>
>> + return ret;
>> +}
>> +
>> +/* enumerate feature devices under pci device */
>> +static int cci_enumerate_feature_devs(struct pci_dev *pcidev)
>> +{
>> + struct cci_drvdata *drvdata = pci_get_drvdata(pcidev);
>> + struct dfl_fpga_enum_info *info;
>> + struct dfl_fpga_cdev *cdev;
>> + int nvec, ret = 0;
>> + int *irq_table;
>> +
>> + /* allocate enumeration info via pci_dev */
>> + info = dfl_fpga_enum_info_alloc(&pcidev->dev);
>> + if (!info)
>> + return -ENOMEM;
>> +
>> + /* add irq info for enumeration if the device support irq */
>> + nvec = cci_pci_alloc_irq(pcidev);
>> + if (nvec < 0) {
>> + dev_err(&pcidev->dev, "Fail to alloc irq %d.\n", nvec);
>> + ret = nvec;
>> + goto enum_info_free_exit;
>> + } else if (nvec) {
>> + irq_table = cci_pci_create_irq_table(pcidev, nvec);
>> + if (!irq_table) {
>> + ret = -ENOMEM;
>> + goto irq_free_exit;
>> + }
>> +
>> + ret = dfl_fpga_enum_info_add_irq(info, nvec, irq_table);
>> + kfree(irq_table);
>> + if (ret)
>> + goto irq_free_exit;
>> + }
>> +
>> + ret = find_dfls_by_default(pcidev, info);
>> + if (ret)
>> + goto irq_free_exit;
>> +
>> /* start enumeration with prepared enumeration information */
>> cdev = dfl_fpga_feature_devs_enumerate(info);
>> if (IS_ERR(cdev)) {
>> --
>> 2.25.2
>
>