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Subject[PATCH 14/22] NTB AMD: Move link-related methods being first in the driver
Date
See patch 01 for reasoning of this movement.

Signed-off-by: Serge Semin <fancer.lancer@gmail.com>

---
drivers/ntb/hw/amd/ntb_hw_amd.c | 188 ++++++++++++++++++++--------------------
1 file changed, 94 insertions(+), 94 deletions(-)

diff --git a/drivers/ntb/hw/amd/ntb_hw_amd.c b/drivers/ntb/hw/amd/ntb_hw_amd.c
index 6ccba0d..6704327 100644
--- a/drivers/ntb/hw/amd/ntb_hw_amd.c
+++ b/drivers/ntb/hw/amd/ntb_hw_amd.c
@@ -71,6 +71,97 @@ MODULE_AUTHOR("AMD Inc.");
static const struct file_operations amd_ntb_debugfs_info;
static struct dentry *debugfs_dir;

+static int amd_link_is_up(struct amd_ntb_dev *ndev)
+{
+ if (!ndev->peer_sta)
+ return NTB_LNK_STA_ACTIVE(ndev->cntl_sta);
+
+ /* If peer_sta is reset or D0 event, the ISR has
+ * started a timer to check link status of hardware.
+ * So here just clear status bit. And if peer_sta is
+ * D3 or PME_TO, D0/reset event will be happened when
+ * system wakeup/poweron, so do nothing here.
+ */
+ if (ndev->peer_sta & AMD_PEER_RESET_EVENT)
+ ndev->peer_sta &= ~AMD_PEER_RESET_EVENT;
+ else if (ndev->peer_sta & AMD_PEER_D0_EVENT)
+ ndev->peer_sta = 0;
+
+ return 0;
+}
+
+static int amd_ntb_link_is_up(struct ntb_dev *ntb,
+ enum ntb_speed *speed,
+ enum ntb_width *width)
+{
+ struct amd_ntb_dev *ndev = ntb_ndev(ntb);
+ int ret = 0;
+
+ if (amd_link_is_up(ndev)) {
+ if (speed)
+ *speed = NTB_LNK_STA_SPEED(ndev->lnk_sta);
+ if (width)
+ *width = NTB_LNK_STA_WIDTH(ndev->lnk_sta);
+
+ dev_dbg(ndev_dev(ndev), "link is up.\n");
+
+ ret = 1;
+ } else {
+ if (speed)
+ *speed = NTB_SPEED_NONE;
+ if (width)
+ *width = NTB_WIDTH_NONE;
+
+ dev_dbg(ndev_dev(ndev), "link is down.\n");
+ }
+
+ return ret;
+}
+
+static int amd_ntb_link_enable(struct ntb_dev *ntb,
+ enum ntb_speed max_speed,
+ enum ntb_width max_width)
+{
+ struct amd_ntb_dev *ndev = ntb_ndev(ntb);
+ void __iomem *mmio = ndev->self_mmio;
+ u32 ntb_ctl;
+
+ /* Enable event interrupt */
+ ndev->int_mask &= ~AMD_EVENT_INTMASK;
+ writel(ndev->int_mask, mmio + AMD_INTMASK_OFFSET);
+
+ if (ndev->ntb.topo == NTB_TOPO_SEC)
+ return -EINVAL;
+ dev_dbg(ndev_dev(ndev), "Enabling Link.\n");
+
+ ntb_ctl = readl(mmio + AMD_CNTL_OFFSET);
+ ntb_ctl |= (PMM_REG_CTL | SMM_REG_CTL);
+ writel(ntb_ctl, mmio + AMD_CNTL_OFFSET);
+
+ return 0;
+}
+
+static int amd_ntb_link_disable(struct ntb_dev *ntb)
+{
+ struct amd_ntb_dev *ndev = ntb_ndev(ntb);
+ void __iomem *mmio = ndev->self_mmio;
+ u32 ntb_ctl;
+
+ /* Disable event interrupt */
+ ndev->int_mask |= AMD_EVENT_INTMASK;
+ writel(ndev->int_mask, mmio + AMD_INTMASK_OFFSET);
+
+ if (ndev->ntb.topo == NTB_TOPO_SEC)
+ return -EINVAL;
+ dev_dbg(ndev_dev(ndev), "Enabling Link.\n");
+
+ ntb_ctl = readl(mmio + AMD_CNTL_OFFSET);
+ ntb_ctl &= ~(PMM_REG_CTL | SMM_REG_CTL);
+ writel(ntb_ctl, mmio + AMD_CNTL_OFFSET);
+
+ return 0;
+}
+
static int ndev_mw_to_bar(struct amd_ntb_dev *ndev, int idx)
{
if (idx < 0 || idx > ndev->mw_count)
@@ -194,97 +285,6 @@ static int amd_ntb_mw_set_trans(struct ntb_dev *ntb, int idx,
return 0;
}

-static int amd_link_is_up(struct amd_ntb_dev *ndev)
-{
- if (!ndev->peer_sta)
- return NTB_LNK_STA_ACTIVE(ndev->cntl_sta);
-
- /* If peer_sta is reset or D0 event, the ISR has
- * started a timer to check link status of hardware.
- * So here just clear status bit. And if peer_sta is
- * D3 or PME_TO, D0/reset event will be happened when
- * system wakeup/poweron, so do nothing here.
- */
- if (ndev->peer_sta & AMD_PEER_RESET_EVENT)
- ndev->peer_sta &= ~AMD_PEER_RESET_EVENT;
- else if (ndev->peer_sta & AMD_PEER_D0_EVENT)
- ndev->peer_sta = 0;
-
- return 0;
-}
-
-static int amd_ntb_link_is_up(struct ntb_dev *ntb,
- enum ntb_speed *speed,
- enum ntb_width *width)
-{
- struct amd_ntb_dev *ndev = ntb_ndev(ntb);
- int ret = 0;
-
- if (amd_link_is_up(ndev)) {
- if (speed)
- *speed = NTB_LNK_STA_SPEED(ndev->lnk_sta);
- if (width)
- *width = NTB_LNK_STA_WIDTH(ndev->lnk_sta);
-
- dev_dbg(ndev_dev(ndev), "link is up.\n");
-
- ret = 1;
- } else {
- if (speed)
- *speed = NTB_SPEED_NONE;
- if (width)
- *width = NTB_WIDTH_NONE;
-
- dev_dbg(ndev_dev(ndev), "link is down.\n");
- }
-
- return ret;
-}
-
-static int amd_ntb_link_enable(struct ntb_dev *ntb,
- enum ntb_speed max_speed,
- enum ntb_width max_width)
-{
- struct amd_ntb_dev *ndev = ntb_ndev(ntb);
- void __iomem *mmio = ndev->self_mmio;
- u32 ntb_ctl;
-
- /* Enable event interrupt */
- ndev->int_mask &= ~AMD_EVENT_INTMASK;
- writel(ndev->int_mask, mmio + AMD_INTMASK_OFFSET);
-
- if (ndev->ntb.topo == NTB_TOPO_SEC)
- return -EINVAL;
- dev_dbg(ndev_dev(ndev), "Enabling Link.\n");
-
- ntb_ctl = readl(mmio + AMD_CNTL_OFFSET);
- ntb_ctl |= (PMM_REG_CTL | SMM_REG_CTL);
- writel(ntb_ctl, mmio + AMD_CNTL_OFFSET);
-
- return 0;
-}
-
-static int amd_ntb_link_disable(struct ntb_dev *ntb)
-{
- struct amd_ntb_dev *ndev = ntb_ndev(ntb);
- void __iomem *mmio = ndev->self_mmio;
- u32 ntb_ctl;
-
- /* Disable event interrupt */
- ndev->int_mask |= AMD_EVENT_INTMASK;
- writel(ndev->int_mask, mmio + AMD_INTMASK_OFFSET);
-
- if (ndev->ntb.topo == NTB_TOPO_SEC)
- return -EINVAL;
- dev_dbg(ndev_dev(ndev), "Enabling Link.\n");
-
- ntb_ctl = readl(mmio + AMD_CNTL_OFFSET);
- ntb_ctl &= ~(PMM_REG_CTL | SMM_REG_CTL);
- writel(ntb_ctl, mmio + AMD_CNTL_OFFSET);
-
- return 0;
-}
-
static u64 amd_ntb_db_valid_mask(struct ntb_dev *ntb)
{
return ntb_ndev(ntb)->db_valid_mask;
@@ -431,12 +431,12 @@ static int amd_ntb_peer_spad_write(struct ntb_dev *ntb,
}

static const struct ntb_dev_ops amd_ntb_ops = {
- .mw_count = amd_ntb_mw_count,
- .mw_get_range = amd_ntb_mw_get_range,
- .mw_set_trans = amd_ntb_mw_set_trans,
.link_is_up = amd_ntb_link_is_up,
.link_enable = amd_ntb_link_enable,
.link_disable = amd_ntb_link_disable,
+ .mw_count = amd_ntb_mw_count,
+ .mw_get_range = amd_ntb_mw_get_range,
+ .mw_set_trans = amd_ntb_mw_set_trans,
.db_valid_mask = amd_ntb_db_valid_mask,
.db_vector_count = amd_ntb_db_vector_count,
.db_vector_mask = amd_ntb_db_vector_mask,
--
2.6.6
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