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Message-Id: <1597027273-25288-2-git-send-email-yilun.xu@intel.com>
Date: Mon, 10 Aug 2020 10:41:10 +0800
From: Xu Yilun <yilun.xu@...el.com>
To: mdf@...nel.org, linux-fpga@...r.kernel.org,
linux-kernel@...r.kernel.org
Cc: trix@...hat.com, lgoncalv@...hat.com, yilun.xu@...el.com
Subject: [PATCH v4 1/4] fpga: dfl: change data type of feature id to u16
The feature id is stored in a 12 bit field in DFH. So a u16 variable is
enough for feature id.
This patch changes all feature id related places to fit u16.
Signed-off-by: Xu Yilun <yilun.xu@...el.com>
Reviewed-by: Tom Rix <trix@...hat.com>
Acked-by: Wu Hao <hao.wu@...el.com>
---
v3: no change.
v4: no change.
---
drivers/fpga/dfl-fme-perf.c | 2 +-
drivers/fpga/dfl.c | 29 +++++++++++++++--------------
drivers/fpga/dfl.h | 10 +++++-----
3 files changed, 21 insertions(+), 20 deletions(-)
diff --git a/drivers/fpga/dfl-fme-perf.c b/drivers/fpga/dfl-fme-perf.c
index 6ce1ed2..5312662 100644
--- a/drivers/fpga/dfl-fme-perf.c
+++ b/drivers/fpga/dfl-fme-perf.c
@@ -148,7 +148,7 @@ struct fme_perf_priv {
struct device *dev;
void __iomem *ioaddr;
struct pmu pmu;
- u64 id;
+ u16 id;
u32 fab_users;
u32 fab_port_id;
diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c
index 649958a..18575d9 100644
--- a/drivers/fpga/dfl.c
+++ b/drivers/fpga/dfl.c
@@ -58,7 +58,7 @@ static const char *dfl_pdata_key_strings[DFL_ID_MAX] = {
*/
struct dfl_dev_info {
const char *name;
- u32 dfh_id;
+ u16 dfh_id;
struct idr id;
enum dfl_fpga_devt_type devt_type;
};
@@ -134,7 +134,7 @@ static enum dfl_id_type feature_dev_id_type(struct platform_device *pdev)
return DFL_ID_MAX;
}
-static enum dfl_id_type dfh_id_to_type(u32 id)
+static enum dfl_id_type dfh_id_to_type(u16 id)
{
int i;
@@ -454,7 +454,7 @@ struct build_feature_devs_info {
* @nr_irqs: number of irqs of this sub feature.
*/
struct dfl_feature_info {
- u64 fid;
+ u16 fid;
struct resource mmio_res;
void __iomem *ioaddr;
struct list_head node;
@@ -649,7 +649,7 @@ static inline u32 feature_size(void __iomem *start)
return ofst ? ofst : 4096;
}
-static u64 feature_id(void __iomem *start)
+static u16 feature_id(void __iomem *start)
{
u64 v = readq(start + DFH);
u16 id = FIELD_GET(DFH_ID, v);
@@ -667,7 +667,7 @@ static u64 feature_id(void __iomem *start)
}
static int parse_feature_irqs(struct build_feature_devs_info *binfo,
- resource_size_t ofst, u64 fid,
+ resource_size_t ofst, u16 fid,
unsigned int *irq_base, unsigned int *nr_irqs)
{
void __iomem *base = binfo->ioaddr + ofst;
@@ -713,12 +713,12 @@ static int parse_feature_irqs(struct build_feature_devs_info *binfo,
return 0;
}
- dev_dbg(binfo->dev, "feature: 0x%llx, irq_base: %u, nr_irqs: %u\n",
+ dev_dbg(binfo->dev, "feature: 0x%x, irq_base: %u, nr_irqs: %u\n",
fid, ibase, inr);
if (ibase + inr > binfo->nr_irqs) {
dev_err(binfo->dev,
- "Invalid interrupt number in feature 0x%llx\n", fid);
+ "Invalid interrupt number in feature 0x%x\n", fid);
return -EINVAL;
}
@@ -726,7 +726,7 @@ static int parse_feature_irqs(struct build_feature_devs_info *binfo,
virq = binfo->irq_table[ibase + i];
if (virq < 0 || virq > NR_IRQS) {
dev_err(binfo->dev,
- "Invalid irq table entry for feature 0x%llx\n",
+ "Invalid irq table entry for feature 0x%x\n",
fid);
return -EINVAL;
}
@@ -748,7 +748,7 @@ static int parse_feature_irqs(struct build_feature_devs_info *binfo,
static int
create_feature_instance(struct build_feature_devs_info *binfo,
struct dfl_fpga_enum_dfl *dfl, resource_size_t ofst,
- resource_size_t size, u64 fid)
+ resource_size_t size, u16 fid)
{
unsigned int irq_base, nr_irqs;
struct dfl_feature_info *finfo;
@@ -819,9 +819,10 @@ static int parse_feature_fiu(struct build_feature_devs_info *binfo,
struct dfl_fpga_enum_dfl *dfl,
resource_size_t ofst)
{
- u32 id, offset;
- u64 v;
int ret = 0;
+ u32 offset;
+ u16 id;
+ u64 v;
v = readq(dfl->ioaddr + ofst + DFH);
id = FIELD_GET(DFH_ID, v);
@@ -855,8 +856,8 @@ static int parse_feature_private(struct build_feature_devs_info *binfo,
resource_size_t ofst)
{
if (!binfo->feature_dev) {
- dev_err(binfo->dev, "the private feature %llx does not belong to any AFU.\n",
- (unsigned long long)feature_id(dfl->ioaddr + ofst));
+ dev_err(binfo->dev, "the private feature 0x%x does not belong to any AFU.\n",
+ feature_id(dfl->ioaddr + ofst));
return -EINVAL;
}
@@ -1424,7 +1425,7 @@ static int do_set_irq_trigger(struct dfl_feature *feature, unsigned int idx,
return 0;
feature->irq_ctx[idx].name =
- kasprintf(GFP_KERNEL, "fpga-irq[%u](%s-%llx)", idx,
+ kasprintf(GFP_KERNEL, "fpga-irq[%u](%s-%x)", idx,
dev_name(&pdev->dev), feature->id);
if (!feature->irq_ctx[idx].name)
return -ENOMEM;
diff --git a/drivers/fpga/dfl.h b/drivers/fpga/dfl.h
index a32dfba..bc61942 100644
--- a/drivers/fpga/dfl.h
+++ b/drivers/fpga/dfl.h
@@ -197,7 +197,7 @@ int dfl_fpga_check_port_id(struct platform_device *pdev, void *pport_id);
* @id: unique dfl private feature id.
*/
struct dfl_feature_id {
- u64 id;
+ u16 id;
};
/**
@@ -240,7 +240,7 @@ struct dfl_feature_irq_ctx {
*/
struct dfl_feature {
struct platform_device *dev;
- u64 id;
+ u16 id;
int resource_index;
void __iomem *ioaddr;
struct dfl_feature_irq_ctx *irq_ctx;
@@ -365,7 +365,7 @@ struct platform_device *dfl_fpga_inode_to_feature_dev(struct inode *inode)
(feature) < (pdata)->features + (pdata)->num; (feature)++)
static inline
-struct dfl_feature *dfl_get_feature_by_id(struct device *dev, u64 id)
+struct dfl_feature *dfl_get_feature_by_id(struct device *dev, u16 id)
{
struct dfl_feature_platform_data *pdata = dev_get_platdata(dev);
struct dfl_feature *feature;
@@ -378,7 +378,7 @@ struct dfl_feature *dfl_get_feature_by_id(struct device *dev, u64 id)
}
static inline
-void __iomem *dfl_get_feature_ioaddr_by_id(struct device *dev, u64 id)
+void __iomem *dfl_get_feature_ioaddr_by_id(struct device *dev, u16 id)
{
struct dfl_feature *feature = dfl_get_feature_by_id(dev, id);
@@ -389,7 +389,7 @@ void __iomem *dfl_get_feature_ioaddr_by_id(struct device *dev, u64 id)
return NULL;
}
-static inline bool is_dfl_feature_present(struct device *dev, u64 id)
+static inline bool is_dfl_feature_present(struct device *dev, u16 id)
{
return !!dfl_get_feature_ioaddr_by_id(dev, id);
}
--
2.7.4
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