Few drivers have own definitions for this constant, so move it to the
PCI core. In addition there are several places where the following
code sequence is used:
1. Read PCI_STATUS
2. Mask out non-error bits
3. Action based on set error bits
4. Write back set error bits to clear them
As this is a repeated pattern, add a helper to the PCI core.
Most affected drivers are network drivers. But as it's about core
PCI functionality, I suppose the series should go through the PCI
tree.
Heiner Kallweit (8):
PCI: add constant PCI_STATUS_ERROR_BITS
PCI: add pci_status_get_and_clear_errors
r8169: use pci_status_get_and_clear_errors
net: cassini: use pci_status_get_and_clear_errors
net: sungem: use pci_status_get_and_clear_errors
net: skfp: use PCI_STATUS_ERROR_BITS
PCI: pci-bridge-emul: use PCI_STATUS_ERROR_BITS
sound: bt87x: use pci_status_get_and_clear_errors
drivers/net/ethernet/marvell/skge.h | 6 -----
drivers/net/ethernet/marvell/sky2.h | 6 -----
drivers/net/ethernet/realtek/r8169_main.c | 15 +++++-------
drivers/net/ethernet/sun/cassini.c | 28 ++++++++-------------
drivers/net/ethernet/sun/sungem.c | 30 +++++++----------------
drivers/net/fddi/skfp/drvfbi.c | 2 +-
drivers/net/fddi/skfp/h/skfbi.h | 5 ----
drivers/pci/pci-bridge-emul.c | 14 ++---------
drivers/pci/pci.c | 23 +++++++++++++++++
include/linux/pci.h | 1 +
include/uapi/linux/pci_regs.h | 7 ++++++
sound/pci/bt87x.c | 7 +-----
12 files changed, 60 insertions(+), 84 deletions(-)
--
2.25.1
Use new constant PCI_STATUS_ERROR_BITS to simplify the code.
Signed-off-by: Heiner Kallweit <[email protected]>
---
drivers/net/fddi/skfp/drvfbi.c | 2 +-
drivers/net/fddi/skfp/h/skfbi.h | 5 -----
2 files changed, 1 insertion(+), 6 deletions(-)
diff --git a/drivers/net/fddi/skfp/drvfbi.c b/drivers/net/fddi/skfp/drvfbi.c
index 9c8aa3a95..d5937aff5 100644
--- a/drivers/net/fddi/skfp/drvfbi.c
+++ b/drivers/net/fddi/skfp/drvfbi.c
@@ -112,7 +112,7 @@ static void card_start(struct s_smc *smc)
*/
outp(ADDR(B0_TST_CTRL), TST_CFG_WRITE_ON) ; /* enable for writes */
word = inpw(PCI_C(PCI_STATUS)) ;
- outpw(PCI_C(PCI_STATUS), word | PCI_ERRBITS) ;
+ outpw(PCI_C(PCI_STATUS), word | PCI_STATUS_ERROR_BITS) ;
outp(ADDR(B0_TST_CTRL), TST_CFG_WRITE_OFF) ; /* disable writes */
/*
diff --git a/drivers/net/fddi/skfp/h/skfbi.h b/drivers/net/fddi/skfp/h/skfbi.h
index 480795681..ccee00b71 100644
--- a/drivers/net/fddi/skfp/h/skfbi.h
+++ b/drivers/net/fddi/skfp/h/skfbi.h
@@ -33,11 +33,6 @@
*/
#define I2C_ADDR_VPD 0xA0 /* I2C address for the VPD EEPROM */
-
-#define PCI_ERRBITS (PCI_STATUS_DETECTED_PARITY | PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_REC_MASTER_ABORT | PCI_STATUS_SIG_TARGET_ABORT | PCI_STATUS_PARITY)
-
-
-
/*
* Control Register File:
* Bank 0
--
2.25.1
Use new helper pci_status_get_and_clear_errors() to simplify the code.
Signed-off-by: Heiner Kallweit <[email protected]>
---
sound/pci/bt87x.c | 7 +------
1 file changed, 1 insertion(+), 6 deletions(-)
diff --git a/sound/pci/bt87x.c b/sound/pci/bt87x.c
index 8c48864c8..656750466 100644
--- a/sound/pci/bt87x.c
+++ b/sound/pci/bt87x.c
@@ -271,13 +271,8 @@ static void snd_bt87x_free_risc(struct snd_bt87x *chip)
static void snd_bt87x_pci_error(struct snd_bt87x *chip, unsigned int status)
{
- u16 pci_status;
+ int pci_status = pci_status_get_and_clear_errors(chip->pci);
- pci_read_config_word(chip->pci, PCI_STATUS, &pci_status);
- pci_status &= PCI_STATUS_PARITY | PCI_STATUS_SIG_TARGET_ABORT |
- PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_REC_MASTER_ABORT |
- PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_DETECTED_PARITY;
- pci_write_config_word(chip->pci, PCI_STATUS, pci_status);
if (pci_status != PCI_STATUS_DETECTED_PARITY)
dev_err(chip->card->dev,
"Aieee - PCI error! status %#08x, PCI status %#04x\n",
--
2.25.1
Use new helper pci_status_get_and_clear_errors() to simplify the code.
Signed-off-by: Heiner Kallweit <[email protected]>
---
drivers/net/ethernet/sun/sungem.c | 30 +++++++++---------------------
1 file changed, 9 insertions(+), 21 deletions(-)
diff --git a/drivers/net/ethernet/sun/sungem.c b/drivers/net/ethernet/sun/sungem.c
index 8358064fb..2d392a7b1 100644
--- a/drivers/net/ethernet/sun/sungem.c
+++ b/drivers/net/ethernet/sun/sungem.c
@@ -545,37 +545,25 @@ static int gem_pci_interrupt(struct net_device *dev, struct gem *gp, u32 gem_sta
}
if (pci_estat & GREG_PCIESTAT_OTHER) {
- u16 pci_cfg_stat;
+ int pci_errs;
/* Interrogate PCI config space for the
* true cause.
*/
- pci_read_config_word(gp->pdev, PCI_STATUS,
- &pci_cfg_stat);
- netdev_err(dev, "Read PCI cfg space status [%04x]\n",
- pci_cfg_stat);
- if (pci_cfg_stat & PCI_STATUS_PARITY)
+ pci_errs = pci_status_get_and_clear_errors(gp->pdev);
+ netdev_err(dev, "PCI status errors[%04x]\n", pci_errs);
+ if (pci_errs & PCI_STATUS_PARITY)
netdev_err(dev, "PCI parity error detected\n");
- if (pci_cfg_stat & PCI_STATUS_SIG_TARGET_ABORT)
+ if (pci_errs & PCI_STATUS_SIG_TARGET_ABORT)
netdev_err(dev, "PCI target abort\n");
- if (pci_cfg_stat & PCI_STATUS_REC_TARGET_ABORT)
+ if (pci_errs & PCI_STATUS_REC_TARGET_ABORT)
netdev_err(dev, "PCI master acks target abort\n");
- if (pci_cfg_stat & PCI_STATUS_REC_MASTER_ABORT)
+ if (pci_errs & PCI_STATUS_REC_MASTER_ABORT)
netdev_err(dev, "PCI master abort\n");
- if (pci_cfg_stat & PCI_STATUS_SIG_SYSTEM_ERROR)
+ if (pci_errs & PCI_STATUS_SIG_SYSTEM_ERROR)
netdev_err(dev, "PCI system error SERR#\n");
- if (pci_cfg_stat & PCI_STATUS_DETECTED_PARITY)
+ if (pci_errs & PCI_STATUS_DETECTED_PARITY)
netdev_err(dev, "PCI parity error\n");
-
- /* Write the error bits back to clear them. */
- pci_cfg_stat &= (PCI_STATUS_PARITY |
- PCI_STATUS_SIG_TARGET_ABORT |
- PCI_STATUS_REC_TARGET_ABORT |
- PCI_STATUS_REC_MASTER_ABORT |
- PCI_STATUS_SIG_SYSTEM_ERROR |
- PCI_STATUS_DETECTED_PARITY);
- pci_write_config_word(gp->pdev,
- PCI_STATUS, pci_cfg_stat);
}
/* For all PCI errors, we should reset the chip. */
--
2.25.1
Use new constant PCI_STATUS_ERROR_BITS to simplify the code.
Signed-off-by: Heiner Kallweit <[email protected]>
---
drivers/pci/pci-bridge-emul.c | 14 ++------------
1 file changed, 2 insertions(+), 12 deletions(-)
diff --git a/drivers/pci/pci-bridge-emul.c b/drivers/pci/pci-bridge-emul.c
index fffa77093..93d8e8910 100644
--- a/drivers/pci/pci-bridge-emul.c
+++ b/drivers/pci/pci-bridge-emul.c
@@ -50,12 +50,7 @@ static const struct pci_bridge_reg_behavior pci_regs_behavior[] = {
(PCI_STATUS_CAP_LIST | PCI_STATUS_66MHZ |
PCI_STATUS_FAST_BACK | PCI_STATUS_DEVSEL_MASK) << 16),
.rsvd = GENMASK(15, 10) | ((BIT(6) | GENMASK(3, 0)) << 16),
- .w1c = (PCI_STATUS_PARITY |
- PCI_STATUS_SIG_TARGET_ABORT |
- PCI_STATUS_REC_TARGET_ABORT |
- PCI_STATUS_REC_MASTER_ABORT |
- PCI_STATUS_SIG_SYSTEM_ERROR |
- PCI_STATUS_DETECTED_PARITY) << 16,
+ .w1c = PCI_STATUS_ERROR_BITS << 16;
},
[PCI_CLASS_REVISION / 4] = { .ro = ~0 },
@@ -100,12 +95,7 @@ static const struct pci_bridge_reg_behavior pci_regs_behavior[] = {
PCI_STATUS_DEVSEL_MASK) << 16) |
GENMASK(11, 8) | GENMASK(3, 0)),
- .w1c = (PCI_STATUS_PARITY |
- PCI_STATUS_SIG_TARGET_ABORT |
- PCI_STATUS_REC_TARGET_ABORT |
- PCI_STATUS_REC_MASTER_ABORT |
- PCI_STATUS_SIG_SYSTEM_ERROR |
- PCI_STATUS_DETECTED_PARITY) << 16,
+ .w1c = PCI_STATUS_ERROR_BITS << 16;
.rsvd = ((BIT(6) | GENMASK(4, 0)) << 16),
},
--
2.25.1
Few drivers use the following code sequence:
1. Read PCI_STATUS
2. Mask out non-error bits
3. Action based on error bits set
4. Write back set error bits to clear them
As this is a repeated pattern, add a helper to the PCI core.
Signed-off-by: Heiner Kallweit <[email protected]>
---
drivers/pci/pci.c | 23 +++++++++++++++++++++++
include/linux/pci.h | 1 +
2 files changed, 24 insertions(+)
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
index d828ca835..c16b0ba2a 100644
--- a/drivers/pci/pci.c
+++ b/drivers/pci/pci.c
@@ -173,6 +173,29 @@ unsigned char pci_bus_max_busnr(struct pci_bus *bus)
}
EXPORT_SYMBOL_GPL(pci_bus_max_busnr);
+/**
+ * pci_status_get_and_clear_errors - return and clear error bits in PCI_STATUS
+ * @pdev: the PCI device
+ *
+ * Returns error bits set in PCI_STATUS and clears them.
+ */
+int pci_status_get_and_clear_errors(struct pci_dev *pdev)
+{
+ u16 status;
+ int ret;
+
+ ret = pci_read_config_word(pdev, PCI_STATUS, &status);
+ if (ret != PCIBIOS_SUCCESSFUL)
+ return -EIO;
+
+ status &= PCI_STATUS_ERROR_BITS;
+ if (status)
+ pci_write_config_word(pdev, PCI_STATUS, status);
+
+ return status;
+}
+EXPORT_SYMBOL_GPL(pci_status_get_and_clear_errors);
+
#ifdef CONFIG_HAS_IOMEM
void __iomem *pci_ioremap_bar(struct pci_dev *pdev, int bar)
{
diff --git a/include/linux/pci.h b/include/linux/pci.h
index 3840a541a..7a75aae04 100644
--- a/include/linux/pci.h
+++ b/include/linux/pci.h
@@ -1203,6 +1203,7 @@ int pci_select_bars(struct pci_dev *dev, unsigned long flags);
bool pci_device_is_present(struct pci_dev *pdev);
void pci_ignore_hotplug(struct pci_dev *dev);
struct pci_dev *pci_real_dma_dev(struct pci_dev *dev);
+int pci_status_get_and_clear_errors(struct pci_dev *pdev);
int __printf(6, 7) pci_request_irq(struct pci_dev *dev, unsigned int nr,
irq_handler_t handler, irq_handler_t thread_fn, void *dev_id,
--
2.25.1
This constant is used (with different names) in more than one driver,
so move it to the PCI core.
Signed-off-by: Heiner Kallweit <[email protected]>
---
drivers/net/ethernet/marvell/skge.h | 6 ------
drivers/net/ethernet/marvell/sky2.h | 6 ------
include/uapi/linux/pci_regs.h | 7 +++++++
3 files changed, 7 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/marvell/skge.h b/drivers/net/ethernet/marvell/skge.h
index 6fa7b6a34..e149bdfe1 100644
--- a/drivers/net/ethernet/marvell/skge.h
+++ b/drivers/net/ethernet/marvell/skge.h
@@ -15,12 +15,6 @@
#define PCI_VPD_ROM_SZ 7L<<14 /* VPD ROM size 0=256, 1=512, ... */
#define PCI_REV_DESC 1<<2 /* Reverse Descriptor bytes */
-#define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
- PCI_STATUS_SIG_SYSTEM_ERROR | \
- PCI_STATUS_REC_MASTER_ABORT | \
- PCI_STATUS_REC_TARGET_ABORT | \
- PCI_STATUS_PARITY)
-
enum csr_regs {
B0_RAP = 0x0000,
B0_CTST = 0x0004,
diff --git a/drivers/net/ethernet/marvell/sky2.h b/drivers/net/ethernet/marvell/sky2.h
index b02b65230..851d8ed34 100644
--- a/drivers/net/ethernet/marvell/sky2.h
+++ b/drivers/net/ethernet/marvell/sky2.h
@@ -252,12 +252,6 @@ enum {
};
-#define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
- PCI_STATUS_SIG_SYSTEM_ERROR | \
- PCI_STATUS_REC_MASTER_ABORT | \
- PCI_STATUS_REC_TARGET_ABORT | \
- PCI_STATUS_PARITY)
-
enum csr_regs {
B0_RAP = 0x0000,
B0_CTST = 0x0004,
diff --git a/include/uapi/linux/pci_regs.h b/include/uapi/linux/pci_regs.h
index 543769048..9b84a1278 100644
--- a/include/uapi/linux/pci_regs.h
+++ b/include/uapi/linux/pci_regs.h
@@ -68,6 +68,13 @@
#define PCI_STATUS_SIG_SYSTEM_ERROR 0x4000 /* Set when we drive SERR */
#define PCI_STATUS_DETECTED_PARITY 0x8000 /* Set on parity error */
+#define PCI_STATUS_ERROR_BITS (PCI_STATUS_DETECTED_PARITY | \
+ PCI_STATUS_SIG_SYSTEM_ERROR | \
+ PCI_STATUS_REC_MASTER_ABORT | \
+ PCI_STATUS_REC_TARGET_ABORT | \
+ PCI_STATUS_SIG_TARGET_ABORT | \
+ PCI_STATUS_PARITY)
+
#define PCI_CLASS_REVISION 0x08 /* High 24 bits are class, low 8 revision */
#define PCI_REVISION_ID 0x08 /* Revision ID */
#define PCI_CLASS_PROG 0x09 /* Reg. Level Programming Interface */
--
2.25.1
Use new helper pci_status_get_and_clear_errors() to simplify the code.
Signed-off-by: Heiner Kallweit <[email protected]>
---
drivers/net/ethernet/realtek/r8169_main.c | 15 ++++++---------
1 file changed, 6 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/realtek/r8169_main.c b/drivers/net/ethernet/realtek/r8169_main.c
index f081007a2..4495a3cf9 100644
--- a/drivers/net/ethernet/realtek/r8169_main.c
+++ b/drivers/net/ethernet/realtek/r8169_main.c
@@ -4357,13 +4357,15 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev)
{
struct rtl8169_private *tp = netdev_priv(dev);
struct pci_dev *pdev = tp->pci_dev;
- u16 pci_status, pci_cmd;
+ int pci_status_errs;
+ u16 pci_cmd;
pci_read_config_word(pdev, PCI_COMMAND, &pci_cmd);
- pci_read_config_word(pdev, PCI_STATUS, &pci_status);
- netif_err(tp, intr, dev, "PCI error (cmd = 0x%04x, status = 0x%04x)\n",
- pci_cmd, pci_status);
+ pci_status_errs = pci_status_get_and_clear_errors(pdev);
+
+ netif_err(tp, intr, dev, "PCI error (cmd = 0x%04x, status_errs = 0x%04x)\n",
+ pci_cmd, pci_status_errs);
/*
* The recovery sequence below admits a very elaborated explanation:
@@ -4380,11 +4382,6 @@ static void rtl8169_pcierr_interrupt(struct net_device *dev)
pci_write_config_word(pdev, PCI_COMMAND, pci_cmd);
- pci_write_config_word(pdev, PCI_STATUS,
- pci_status & (PCI_STATUS_DETECTED_PARITY |
- PCI_STATUS_SIG_SYSTEM_ERROR | PCI_STATUS_REC_MASTER_ABORT |
- PCI_STATUS_REC_TARGET_ABORT | PCI_STATUS_SIG_TARGET_ABORT));
-
rtl_schedule_task(tp, RTL_FLAG_TASK_RESET_PENDING);
}
--
2.25.1
Use new helper pci_status_get_and_clear_errors() to simplify the code.
Signed-off-by: Heiner Kallweit <[email protected]>
---
drivers/net/ethernet/sun/cassini.c | 28 ++++++++++------------------
1 file changed, 10 insertions(+), 18 deletions(-)
diff --git a/drivers/net/ethernet/sun/cassini.c b/drivers/net/ethernet/sun/cassini.c
index 6ec9163e2..e6d1aa882 100644
--- a/drivers/net/ethernet/sun/cassini.c
+++ b/drivers/net/ethernet/sun/cassini.c
@@ -1716,34 +1716,26 @@ static int cas_pci_interrupt(struct net_device *dev, struct cas *cp,
pr_cont("\n");
if (stat & PCI_ERR_OTHER) {
- u16 cfg;
+ int pci_errs;
/* Interrogate PCI config space for the
* true cause.
*/
- pci_read_config_word(cp->pdev, PCI_STATUS, &cfg);
- netdev_err(dev, "Read PCI cfg space status [%04x]\n", cfg);
- if (cfg & PCI_STATUS_PARITY)
+ pci_errs = pci_status_get_and_clear_errors(cp->pdev);
+
+ netdev_err(dev, "PCI status errors[%04x]\n", pci_errs);
+ if (pci_errs & PCI_STATUS_PARITY)
netdev_err(dev, "PCI parity error detected\n");
- if (cfg & PCI_STATUS_SIG_TARGET_ABORT)
+ if (pci_errs & PCI_STATUS_SIG_TARGET_ABORT)
netdev_err(dev, "PCI target abort\n");
- if (cfg & PCI_STATUS_REC_TARGET_ABORT)
+ if (pci_errs & PCI_STATUS_REC_TARGET_ABORT)
netdev_err(dev, "PCI master acks target abort\n");
- if (cfg & PCI_STATUS_REC_MASTER_ABORT)
+ if (pci_errs & PCI_STATUS_REC_MASTER_ABORT)
netdev_err(dev, "PCI master abort\n");
- if (cfg & PCI_STATUS_SIG_SYSTEM_ERROR)
+ if (pci_errs & PCI_STATUS_SIG_SYSTEM_ERROR)
netdev_err(dev, "PCI system error SERR#\n");
- if (cfg & PCI_STATUS_DETECTED_PARITY)
+ if (pci_errs & PCI_STATUS_DETECTED_PARITY)
netdev_err(dev, "PCI parity error\n");
-
- /* Write the error bits back to clear them. */
- cfg &= (PCI_STATUS_PARITY |
- PCI_STATUS_SIG_TARGET_ABORT |
- PCI_STATUS_REC_TARGET_ABORT |
- PCI_STATUS_REC_MASTER_ABORT |
- PCI_STATUS_SIG_SYSTEM_ERROR |
- PCI_STATUS_DETECTED_PARITY);
- pci_write_config_word(cp->pdev, PCI_STATUS, cfg);
}
/* For all PCI errors, we should reset the chip. */
--
2.25.1
From: Heiner Kallweit <[email protected]>
Date: Mon, 24 Feb 2020 22:20:08 +0100
> Few drivers have own definitions for this constant, so move it to the
> PCI core. In addition there are several places where the following
> code sequence is used:
> 1. Read PCI_STATUS
> 2. Mask out non-error bits
> 3. Action based on set error bits
> 4. Write back set error bits to clear them
>
> As this is a repeated pattern, add a helper to the PCI core.
>
> Most affected drivers are network drivers. But as it's about core
> PCI functionality, I suppose the series should go through the PCI
> tree.
Heiner, something is up with this submission.
The subject line here says 0/9, but the patches say N/8 and patch #8 never
showed up on the list.
Sort out what this should be and resubmit, thank you.
On 25.02.2020 00:33, David Miller wrote:
> From: Heiner Kallweit <[email protected]>
> Date: Mon, 24 Feb 2020 22:20:08 +0100
>
>> Few drivers have own definitions for this constant, so move it to the
>> PCI core. In addition there are several places where the following
>> code sequence is used:
>> 1. Read PCI_STATUS
>> 2. Mask out non-error bits
>> 3. Action based on set error bits
>> 4. Write back set error bits to clear them
>>
>> As this is a repeated pattern, add a helper to the PCI core.
>>
>> Most affected drivers are network drivers. But as it's about core
>> PCI functionality, I suppose the series should go through the PCI
>> tree.
>
> Heiner, something is up with this submission.
>
> The subject line here says 0/9, but the patches say N/8 and patch #8 never
> showed up on the list.
>
> Sort out what this should be and resubmit, thank you.
>
Oops, sorry. I'll resubmit.