[PATCH v10 5/6] PCI: endpoint: makeup pci-epf-vntb.c

Frank Li
2022-09-13T21:11:31Z

Remove unused field: epf_db_phy.
Remove __iomem before epf_db.
Remove dupicate check if (readl(ntb->epf_db + i * 4)).
Using readl_relaxed instead of readl.
Using marco ENTRY_SIZE instead of number 4 at all place.

Signed-off-by: Frank Li <Frank.Li@nxp.com>
---
drivers/pci/endpoint/functions/pci-epf-vntb.c | 38 +++++++++----------
1 file changed, 19 insertions(+), 19 deletions(-)

diff --git a/drivers/pci/endpoint/functions/pci-epf-vntb.c b/drivers/pci/endpoint/functions/pci-epf-vntb.c
index 1466dd1904175..17f030befde52 100644
--- a/drivers/pci/endpoint/functions/pci-epf-vntb.c
+++ b/drivers/pci/endpoint/functions/pci-epf-vntb.c
@@ -67,6 +67,8 @@ static struct workqueue_struct *kpcintb_workqueue;
#define MAX_DB_COUNT 32
#define MAX_MW 4

+#define ENTRY_SIZE 4
+
enum epf_ntb_bar {
BAR_CONFIG,
BAR_DB,
@@ -136,8 +138,7 @@ struct epf_ntb {

struct epf_ntb_ctrl *reg;

- phys_addr_t epf_db_phy;
- void __iomem *epf_db;
+ void *epf_db;

phys_addr_t vpci_mw_phy[MAX_MW];
void __iomem *vpci_mw_addr[MAX_MW];
@@ -254,12 +255,9 @@ static void epf_ntb_cmd_handler(struct work_struct *work)
ntb = container_of(work, struct epf_ntb, cmd_handler.work);

for (i = 1; i < ntb->db_count; i++) {
- if (readl(ntb->epf_db + i * 4)) {
- if (readl(ntb->epf_db + i * 4))
- ntb->db |= 1 << (i - 1);
-
+ if (readl_relaxed(ntb->epf_db + i * ENTRY_SIZE)) {
ntb_db_event(&ntb->ntb, i);
- writel(0, ntb->epf_db + i * 4);
+ writel(0, ntb->epf_db + i * ENTRY_SIZE);
}
}

@@ -424,7 +422,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
spad_count = ntb->spad_count;

ctrl_size = sizeof(struct epf_ntb_ctrl);
- spad_size = 2 * spad_count * 4;
+ spad_size = 2 * spad_count * ENTRY_SIZE;

if (!align) {
ctrl_size = roundup_pow_of_two(ctrl_size);
@@ -454,7 +452,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
ctrl->num_mws = ntb->num_mws;
ntb->spad_size = spad_size;

- ctrl->db_entry_size = 4;
+ ctrl->db_entry_size = ENTRY_SIZE;

for (i = 0; i < ntb->db_count; i++) {
ntb->reg->db_data[i] = 1 + i;
@@ -516,13 +514,15 @@ static int epf_ntb_configure_interrupt(struct epf_ntb *ntb)
static int epf_ntb_db_bar_init(struct epf_ntb *ntb)
{
const struct pci_epc_features *epc_features;
- u32 align;
struct device *dev = &ntb->epf->dev;
- int ret;
struct pci_epf_bar *epf_bar;
- void __iomem *mw_addr;
enum pci_barno barno;
- size_t size = 4 * ntb->db_count;
+ void *mw_addr;
+ size_t size;
+ u32 align;
+ int ret;
+
+ size = ENTRY_SIZE * ntb->db_count;

epc_features = pci_epc_get_features(ntb->epf->epc,
ntb->epf->func_no,
@@ -1084,11 +1084,11 @@ static int vntb_epf_link_enable(struct ntb_dev *ntb,
static u32 vntb_epf_spad_read(struct ntb_dev *ndev, int idx)
{
struct epf_ntb *ntb = ntb_ndev(ndev);
- int off = ntb->reg->spad_offset, ct = ntb->reg->spad_count * 4;
+ int off = ntb->reg->spad_offset, ct = ntb->reg->spad_count * ENTRY_SIZE;
u32 val;
void __iomem *base = ntb->reg;

- val = readl(base + off + ct + idx * 4);
+ val = readl(base + off + ct + idx * ENTRY_SIZE);
return val;
}

@@ -1096,10 +1096,10 @@ static int vntb_epf_spad_write(struct ntb_dev *ndev, int idx, u32 val)
{
struct epf_ntb *ntb = ntb_ndev(ndev);
struct epf_ntb_ctrl *ctrl = ntb->reg;
- int off = ctrl->spad_offset, ct = ctrl->spad_count * 4;
+ int off = ctrl->spad_offset, ct = ctrl->spad_count * ENTRY_SIZE;
void __iomem *base = ntb->reg;

- writel(val, base + off + ct + idx * 4);
+ writel(val, base + off + ct + idx * ENTRY_SIZE);
return 0;
}

@@ -1111,7 +1111,7 @@ static u32 vntb_epf_peer_spad_read(struct ntb_dev *ndev, int pidx, int idx)
void __iomem *base = ntb->reg;
u32 val;

- val = readl(base + off + idx * 4);
+ val = readl(base + off + idx * ENTRY_SIZE);
return val;
}

@@ -1122,7 +1122,7 @@ static int vntb_epf_peer_spad_write(struct ntb_dev *ndev, int pidx, int idx, u32
int off = ctrl->spad_offset;
void __iomem *base = ntb->reg;

- writel(val, base + off + idx * 4);
+ writel(val, base + off + idx * ENTRY_SIZE);
return 0;
}

--
2.35.1