The patch exports two functions, which base on corresponding OPAL
APIs to retrieve PCI slot status:
pnv_pci_get_power_status() opal_pci_get_power_status()
pnv_pci_get_presence_status() opal_pci_get_presence_status()
Signed-off-by: Gavin Shan <gwshan@xxxxxxxxxxxxxxxxxx>
---
arch/powerpc/include/asm/opal.h | 6 +++-
arch/powerpc/include/asm/pnv-pci.h | 3 ++
arch/powerpc/platforms/powernv/eeh-ioda.c | 34 ++---------------------
arch/powerpc/platforms/powernv/opal-wrappers.S | 2 ++
arch/powerpc/platforms/powernv/pci.c | 38 ++++++++++++++++++++++++++
arch/powerpc/platforms/powernv/pci.h | 1 +
6 files changed, 51 insertions(+), 33 deletions(-)
diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index b59811f..b75be1c 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h
@@ -153,6 +153,8 @@ struct opal_sg_list {
#define OPAL_HANDLE_HMI 98
#define OPAL_REGISTER_DUMP_REGION 101
#define OPAL_UNREGISTER_DUMP_REGION 102
+#define OPAL_PCI_GET_POWER_STATUS 110
+#define OPAL_PCI_GET_PRESENCE_STATUS 111
#ifndef __ASSEMBLY__
@@ -905,7 +907,7 @@ int64_t opal_get_epow_status(__be64 *status);
int64_t opal_set_system_attention_led(uint8_t led_action);
int64_t opal_pci_next_error(uint64_t phb_id, __be64 *first_frozen_pe,
__be16 *pci_error_type, __be16 *severity);
-int64_t opal_pci_poll(uint64_t id);
+int64_t opal_pci_poll(uint64_t id, uint8_t *val);
int64_t opal_return_cpu(void);
int64_t opal_check_token(uint64_t token);
int64_t opal_reinit_cpus(uint64_t flags);
@@ -946,6 +948,8 @@ int64_t opal_handle_hmi(void);
int64_t opal_register_dump_region(uint32_t id, uint64_t start, uint64_t end);
int64_t opal_unregister_dump_region(uint32_t id);
int64_t opal_pci_set_phb_cxl_mode(uint64_t phb_id, uint64_t mode, uint64_t pe_number);
+int64_t opal_pci_get_power_status(uint64_t id, uint8_t *status);
+int64_t opal_pci_get_presence_status(uint64_t id, uint8_t *status);
/* Internal functions */
extern int early_init_dt_scan_opal(unsigned long node, const char *uname,
diff --git a/arch/powerpc/include/asm/pnv-pci.h b/arch/powerpc/include/asm/pnv-pci.h
index f09a22f..527d97a 100644
--- a/arch/powerpc/include/asm/pnv-pci.h
+++ b/arch/powerpc/include/asm/pnv-pci.h
@@ -13,6 +13,9 @@
#include <linux/pci.h>
#include <misc/cxl.h>
+extern int pnv_pci_get_power_status(unsigned int index, unsigned char *status);
+extern int pnv_pci_get_presence_status(unsigned int index, unsigned char *status);
+
int pnv_phb_to_cxl(struct pci_dev *dev);
int pnv_cxl_ioda_msi_setup(struct pci_dev *dev, unsigned int hwirq,
unsigned int virq);
diff --git a/arch/powerpc/platforms/powernv/eeh-ioda.c b/arch/powerpc/platforms/powernv/eeh-ioda.c
index 4bf2fb5..fb66c74 100644
--- a/arch/powerpc/platforms/powernv/eeh-ioda.c
+++ b/arch/powerpc/platforms/powernv/eeh-ioda.c
@@ -490,24 +490,6 @@ static int ioda_eeh_get_state(struct eeh_pe *pe)
return ioda_eeh_get_pe_state(pe);
}
-static s64 ioda_eeh_phb_poll(uint64_t id)
-{
- s64 rc = OPAL_HARDWARE;
-
- while (1) {
- rc = opal_pci_poll(id);
- if (rc <= 0)
- break;
-
- if (system_state < SYSTEM_RUNNING)
- udelay(1000 * rc);
- else
- msleep(rc);
- }
-
- return rc;
-}
-
int ioda_eeh_phb_reset(struct pci_controller *hose, int option)
{
struct pnv_phb *phb = hose->private_data;
@@ -542,13 +524,7 @@ int ioda_eeh_phb_reset(struct pci_controller *hose, int option)
* need the PCI bus settlement delay.
*/
rc = opal_pci_reset(phb->opal_id, reset_scope);
- if (rc > 0)
- rc = ioda_eeh_phb_poll(phb->opal_id);
-
- if (rc != OPAL_SUCCESS)
- return -EIO;
-
- return 0;
+ return pnv_pci_poll(phb->opal_id, rc, NULL);
}
static int __ioda_eeh_bridge_reset(struct pci_dev *dev, int option)
@@ -641,13 +617,7 @@ static int ioda_eeh_bridge_reset(struct pci_dev *dev, int option)
phb = hose->private_data;
id |= ((phb->opal_id << 16) | (dev->bus->number << 8) | (dev->devfn));
rc = opal_pci_reset(id, reset_scope);
- if (rc > 0)
- rc = ioda_eeh_phb_poll(id);
-
- if (rc != OPAL_SUCCESS)
- return -EIO;
-
- return 0;
+ return pnv_pci_poll(id, rc, NULL);
}
static int pnv_pci_dev_reset_type(struct pci_dev *pdev, void *data)
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S
index b6474a1..b2c15ff 100644
--- a/arch/powerpc/platforms/powernv/opal-wrappers.S
+++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
@@ -249,3 +249,5 @@ OPAL_CALL(opal_handle_hmi, OPAL_HANDLE_HMI);
OPAL_CALL(opal_register_dump_region, OPAL_REGISTER_DUMP_REGION);
OPAL_CALL(opal_unregister_dump_region, OPAL_UNREGISTER_DUMP_REGION);
OPAL_CALL(opal_pci_set_phb_cxl_mode, OPAL_PCI_SET_PHB_CXL_MODE);
+OPAL_CALL(opal_pci_get_power_status, OPAL_PCI_GET_POWER_STATUS);
+OPAL_CALL(opal_pci_get_presence_status, OPAL_PCI_GET_PRESENCE_STATUS);
diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index b2187d0..f5bae4f 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -45,6 +45,44 @@
#define cfg_dbg(fmt...) do { } while(0)
//#define cfg_dbg(fmt...) printk(fmt)
+int pnv_pci_poll(uint64_t id, int64_t rval, uint8_t *pval)
+{
+ while (rval > 0) {
+ rval = opal_pci_poll(id, pval);
+ if (rval <= 0)
+ break;
+
+ if (system_state < SYSTEM_RUNNING)
+ udelay(1000 * rval);
+ else
+ msleep(rval);
+ }
+
+ return rval ? -EIO : 0;
+}
+
+int pnv_pci_get_power_status(unsigned int index, unsigned char *status)
+{
+ uint64_t id = (0x1ul << 63);
+ long rc;
+
+ id |= index;
+ rc = opal_pci_get_power_status(id, status);
+ return pnv_pci_poll(id, rc, status);
+}
+EXPORT_SYMBOL_GPL(pnv_pci_get_power_status);
+
+int pnv_pci_get_presence_status(unsigned int index, unsigned char *status)
+{
+ uint64_t id = (0x1ul << 63);
+ long rc;
+
+ id |= index;
+ rc = opal_pci_get_presence_status(id, status);
+ return pnv_pci_poll(id, rc, status);
+}
+EXPORT_SYMBOL_GPL(pnv_pci_get_presence_status);
+
#ifdef CONFIG_PCI_MSI
static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
{
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index 6c02ff8..396fe02 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -217,6 +217,7 @@ extern struct pci_ops pnv_pci_ops;
extern struct pnv_eeh_ops ioda_eeh_ops;
#endif
+int pnv_pci_poll(uint64_t id, int64_t rval, uint8_t *pval);
void pnv_pci_dump_phb_diag_data(struct pci_controller *hose,
unsigned char *log_buff);
int pnv_pci_cfg_read(struct device_node *dn,
--
1.8.3.2
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