powerpc/eeh: Cleanup function names in the EEH core

The EEH has been implemented on pSeries platform. The original
code looks a little bit nasty. The patch does cleanup on the
current EEH implementation so that it looks more clean.

        * Try adding prefix "eeh" for functions.
        * Some function names have been adjusted so that they looks
          shorter and meaningful.

Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

4 files changed, 59 insertions, 63 deletions

diff --git a/arch/powerpc/include/asm/ppc-pci.h b/arch/powerpc/include/asm/ppc-pci.h
index 221d82fd8231..605a97000fcf 100644
--- a/arch/powerpc/include/asm/ppc-pci.h
+++ b/arch/powerpc/include/asm/ppc-pci.h
@@ -58,16 +58,16 @@ struct pci_dev *pci_get_device_by_addr(unsigned long addr);
 void eeh_slot_error_detail (struct pci_dn *pdn, int severity);
 #define EEH_THAW_MMIO 2
 #define EEH_THAW_DMA  3
-int rtas_pci_enable(struct pci_dn *pdn, int function);
-int rtas_set_slot_reset (struct pci_dn *);
+int eeh_pci_enable(struct pci_dn *pdn, int function);
+int eeh_reset_pe(struct pci_dn *);
 int eeh_wait_for_slot_status(struct pci_dn *pdn, int max_wait_msecs);
 void eeh_restore_bars(struct pci_dn *);
-void rtas_configure_bridge(struct pci_dn *);
+void eeh_configure_bridge(struct pci_dn *);
 int rtas_write_config(struct pci_dn *, int where, int size, u32 val);
 int rtas_read_config(struct pci_dn *, int where, int size, u32 *val);
 void eeh_mark_slot(struct device_node *dn, int mode_flag);
 void eeh_clear_slot(struct device_node *dn, int mode_flag);
-struct device_node *find_device_pe(struct device_node *dn);
+struct device_node *eeh_find_device_pe(struct device_node *dn);
 
 void eeh_sysfs_add_device(struct pci_dev *pdev);
 void eeh_sysfs_remove_device(struct pci_dev *pdev);
diff --git a/arch/powerpc/platforms/pseries/eeh.c b/arch/powerpc/platforms/pseries/eeh.c
index 5f6d37bdd4f5..fa885891e1c3 100644
--- a/arch/powerpc/platforms/pseries/eeh.c
+++ b/arch/powerpc/platforms/pseries/eeh.c
@@ -130,7 +130,7 @@ static unsigned long slot_resets;
 #define IS_BRIDGE(class_code) (((class_code)<<16) == PCI_BASE_CLASS_BRIDGE)
 
 /**
- * rtas_slot_error_detail - Retrieve error log through RTAS call
+ * eeh_rtas_slot_error_detail - Retrieve error log through RTAS call
  * @pdn: device node
  * @severity: temporary or permanent error log
  * @driver_log: driver log to be combined with the retrieved error log
@@ -139,7 +139,7 @@ static unsigned long slot_resets;
  * This routine should be called to retrieve error log through the dedicated
  * RTAS call.
  */
-static void rtas_slot_error_detail(struct pci_dn *pdn, int severity,
+static void eeh_rtas_slot_error_detail(struct pci_dn *pdn, int severity,
                                    char *driver_log, size_t loglen)
 {
         int config_addr;
@@ -170,7 +170,7 @@ static void rtas_slot_error_detail(struct pci_dn *pdn, int severity,
 }
 
 /**
- * gather_pci_data - Copy assorted PCI config space registers to buff
+ * eeh_gather_pci_data - Copy assorted PCI config space registers to buff
  * @pdn: device to report data for
  * @buf: point to buffer in which to log
  * @len: amount of room in buffer
@@ -178,7 +178,7 @@ static void rtas_slot_error_detail(struct pci_dn *pdn, int severity,
  * This routine captures assorted PCI configuration space data,
  * and puts them into a buffer for RTAS error logging.
  */
-static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
+static size_t eeh_gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
 {
         struct pci_dev *dev = pdn->pcidev;
         u32 cfg;
@@ -258,7 +258,7 @@ static size_t gather_pci_data(struct pci_dn *pdn, char * buf, size_t len)
                 for_each_child_of_node(pdn->node, dn) {
                         pdn = PCI_DN(dn);
                         if (pdn)
-                                n += gather_pci_data(pdn, buf+n, len-n);
+                                n += eeh_gather_pci_data(pdn, buf+n, len-n);
                 }
         }
 
@@ -280,23 +280,23 @@ void eeh_slot_error_detail(struct pci_dn *pdn, int severity)
         size_t loglen = 0;
         pci_regs_buf[0] = 0;
 
-        rtas_pci_enable(pdn, EEH_THAW_MMIO);
-        rtas_configure_bridge(pdn);
+        eeh_pci_enable(pdn, EEH_THAW_MMIO);
+        eeh_configure_bridge(pdn);
         eeh_restore_bars(pdn);
-        loglen = gather_pci_data(pdn, pci_regs_buf, EEH_PCI_REGS_LOG_LEN);
+        loglen = eeh_gather_pci_data(pdn, pci_regs_buf, EEH_PCI_REGS_LOG_LEN);
 
-        rtas_slot_error_detail(pdn, severity, pci_regs_buf, loglen);
+        eeh_rtas_slot_error_detail(pdn, severity, pci_regs_buf, loglen);
 }
 
 /**
- * read_slot_reset_state - Read the reset state of a device node's slot
+ * eeh_read_slot_reset_state - Read the reset state of a device node's slot
  * @dn: device node to read
  * @rets: array to return results in
  *
  * Read the reset state of a device node's slot through platform dependent
  * function call.
  */
-static int read_slot_reset_state(struct pci_dn *pdn, int rets[])
+static int eeh_read_slot_reset_state(struct pci_dn *pdn, int rets[])
 {
         int token, outputs;
         int config_addr;
@@ -332,15 +332,14 @@ static int read_slot_reset_state(struct pci_dn *pdn, int rets[])
  * the max allowed wait time is exceeded, in which case
  * a -2 is returned.
  */
-int
-eeh_wait_for_slot_status(struct pci_dn *pdn, int max_wait_msecs)
+int eeh_wait_for_slot_status(struct pci_dn *pdn, int max_wait_msecs)
 {
         int rc;
         int rets[3];
         int mwait;
 
         while (1) {
-                rc = read_slot_reset_state(pdn, rets);
+                rc = eeh_read_slot_reset_state(pdn, rets);
                 if (rc) return rc;
                 if (rets[1] == 0) return -1;  /* EEH is not supported */
 
@@ -389,12 +388,12 @@ static inline unsigned long eeh_token_to_phys(unsigned long token)
 }
 
 /**
- * find_device_pe - Retrieve the PE for the given device
+ * eeh_find_device_pe - Retrieve the PE for the given device
  * @dn: device node
  *
  * Return the PE under which this device lies
  */
-struct device_node * find_device_pe(struct device_node *dn)
+struct device_node *eeh_find_device_pe(struct device_node *dn)
 {
         while ((dn->parent) && PCI_DN(dn->parent) &&
               (PCI_DN(dn->parent)->eeh_mode & EEH_MODE_SUPPORTED)) {
@@ -445,7 +444,7 @@ static void __eeh_mark_slot(struct device_node *parent, int mode_flag)
 void eeh_mark_slot(struct device_node *dn, int mode_flag)
 {
         struct pci_dev *dev;
-        dn = find_device_pe(dn);
+        dn = eeh_find_device_pe(dn);
 
         /* Back up one, since config addrs might be shared */
         if (!pcibios_find_pci_bus(dn) && PCI_DN(dn->parent))
@@ -493,7 +492,7 @@ void eeh_clear_slot(struct device_node *dn, int mode_flag)
         unsigned long flags;
         raw_spin_lock_irqsave(&confirm_error_lock, flags);
         
-        dn = find_device_pe(dn);
+        dn = eeh_find_device_pe(dn);
         
         /* Back up one, since config addrs might be shared */
         if (!pcibios_find_pci_bus(dn) && PCI_DN(dn->parent))
@@ -538,7 +537,7 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
                 no_dn++;
                 return 0;
         }
-        dn = find_device_pe(dn);
+        dn = eeh_find_device_pe(dn);
         pdn = PCI_DN(dn);
 
         /* Access to IO BARs might get this far and still not want checking. */
@@ -585,11 +584,11 @@ int eeh_dn_check_failure(struct device_node *dn, struct pci_dev *dev)
          * function zero of a multi-function device.
          * In any case they must share a common PHB.
          */
-        ret = read_slot_reset_state(pdn, rets);
+        ret = eeh_read_slot_reset_state(pdn, rets);
 
         /* If the call to firmware failed, punt */
         if (ret != 0) {
-                printk(KERN_WARNING "EEH: read_slot_reset_state() failed; rc=%d dn=%s\n",
+                printk(KERN_WARNING "EEH: eeh_read_slot_reset_state() failed; rc=%d dn=%s\n",
                        ret, dn->full_name);
                 false_positives++;
                 pdn->eeh_false_positives ++;
@@ -687,15 +686,14 @@ EXPORT_SYMBOL(eeh_check_failure);
 
 
 /**
- * rtas_pci_enable - Enable MMIO or DMA transfers for this slot
+ * eeh_pci_enable - Enable MMIO or DMA transfers for this slot
  * @pdn pci device node
  *
  * This routine should be called to reenable frozen MMIO or DMA
  * so that it would work correctly again. It's useful while doing
  * recovery or log collection on the indicated device.
  */
-int
-rtas_pci_enable(struct pci_dn *pdn, int function)
+int eeh_pci_enable(struct pci_dn *pdn, int function)
 {
         int config_addr;
         int rc;
@@ -723,7 +721,7 @@ rtas_pci_enable(struct pci_dn *pdn, int function)
 }
 
 /**
- * rtas_pci_slot_reset - Raises/Lowers the pci #RST line
+ * eeh_slot_reset - Raises/Lowers the pci #RST line
  * @pdn: pci device node
  * @state: 1/0 to raise/lower the #RST
  *
@@ -732,8 +730,7 @@ rtas_pci_enable(struct pci_dn *pdn, int function)
  * and drops the #RST line if 'state is '0'.  This routine is
  * safe to call in an interrupt context.
  */
-static void
-rtas_pci_slot_reset(struct pci_dn *pdn, int state)
+static void eeh_slot_reset(struct pci_dn *pdn, int state)
 {
         int config_addr;
         int rc;
@@ -786,13 +783,13 @@ int pcibios_set_pcie_reset_state(struct pci_dev *dev, enum pcie_reset_state stat
 
         switch (state) {
         case pcie_deassert_reset:
-                rtas_pci_slot_reset(pdn, 0);
+                eeh_slot_reset(pdn, 0);
                 break;
         case pcie_hot_reset:
-                rtas_pci_slot_reset(pdn, 1);
+                eeh_slot_reset(pdn, 1);
                 break;
         case pcie_warm_reset:
-                rtas_pci_slot_reset(pdn, 3);
+                eeh_slot_reset(pdn, 3);
                 break;
         default:
                 return -EINVAL;
@@ -839,7 +836,7 @@ void __eeh_set_pe_freset(struct device_node *parent, unsigned int *freset)
 void eeh_set_pe_freset(struct device_node *dn, unsigned int *freset)
 {
         struct pci_dev *dev;
-        dn = find_device_pe(dn);
+        dn = eeh_find_device_pe(dn);
 
         /* Back up one, since config addrs might be shared */
         if (!pcibios_find_pci_bus(dn) && PCI_DN(dn->parent))
@@ -853,12 +850,12 @@ void eeh_set_pe_freset(struct device_node *dn, unsigned int *freset)
 }
 
 /**
- * __rtas_set_slot_reset - Assert the pci #RST line for 1/4 second
+ * eeh_reset_pe_once - Assert the pci #RST line for 1/4 second
  * @pdn: pci device node to be reset.
  *
  * Assert the PCI #RST line for 1/4 second.
  */
-static void __rtas_set_slot_reset(struct pci_dn *pdn)
+static void eeh_reset_pe_once(struct pci_dn *pdn)
 {
         unsigned int freset = 0;
 
@@ -871,9 +868,9 @@ static void __rtas_set_slot_reset(struct pci_dn *pdn)
         eeh_set_pe_freset(pdn->node, &freset);
 
         if (freset)
-                rtas_pci_slot_reset(pdn, 3);
+                eeh_slot_reset(pdn, 3);
         else
-                rtas_pci_slot_reset(pdn, 1);
+                eeh_slot_reset(pdn, 1);
 
         /* The PCI bus requires that the reset be held high for at least
          * a 100 milliseconds. We wait a bit longer 'just in case'.
@@ -887,7 +884,7 @@ static void __rtas_set_slot_reset(struct pci_dn *pdn)
          */
         eeh_clear_slot(pdn->node, EEH_MODE_ISOLATED);
 
-        rtas_pci_slot_reset(pdn, 0);
+        eeh_slot_reset(pdn, 0);
 
         /* After a PCI slot has been reset, the PCI Express spec requires
          * a 1.5 second idle time for the bus to stabilize, before starting
@@ -898,20 +895,20 @@ static void __rtas_set_slot_reset(struct pci_dn *pdn)
 }
 
 /**
- * rtas_set_slot_reset - Reset the indicated PE
+ * eeh_reset_pe - Reset the indicated PE
  * @pdn: PCI device node
  *
  * This routine should be called to reset indicated device, including
  * PE. A PE might include multiple PCI devices and sometimes PCI bridges
  * might be involved as well.
  */
-int rtas_set_slot_reset(struct pci_dn *pdn)
+int eeh_reset_pe(struct pci_dn *pdn)
 {
         int i, rc;
 
         /* Take three shots at resetting the bus */
         for (i=0; i<3; i++) {
-                __rtas_set_slot_reset(pdn);
+                eeh_reset_pe_once(pdn);
 
                 rc = eeh_wait_for_slot_status(pdn, PCI_BUS_RESET_WAIT_MSEC);
                 if (rc == 0)
@@ -938,14 +935,14 @@ int rtas_set_slot_reset(struct pci_dn *pdn)
  */
 
 /**
- * __restore_bars - Restore the Base Address Registers
+ * eeh_restore_one_device_bars - Restore the Base Address Registers for one device
  * @pdn: pci device node
  *
  * Loads the PCI configuration space base address registers,
  * the expansion ROM base address, the latency timer, and etc.
  * from the saved values in the device node.
  */
-static inline void __restore_bars(struct pci_dn *pdn)
+static inline void eeh_restore_one_device_bars(struct pci_dn *pdn)
 {
         int i;
         u32 cmd;
@@ -999,7 +996,7 @@ void eeh_restore_bars(struct pci_dn *pdn)
                 return;
         
         if ((pdn->eeh_mode & EEH_MODE_SUPPORTED) && !IS_BRIDGE(pdn->class_code))
-                __restore_bars(pdn);
+                eeh_restore_one_device_bars(pdn);
 
         for_each_child_of_node(pdn->node, dn)
                 eeh_restore_bars(PCI_DN(dn));
@@ -1026,15 +1023,14 @@ static void eeh_save_bars(struct pci_dn *pdn)
 }
 
 /**
- * rtas_configure_bridge - Configure PCI bridges for the indicated PE
+ * eeh_configure_bridge - Configure PCI bridges for the indicated PE
  * @pdn: PCI device node
  *
  * PCI bridges might be included in PE. In order to make the PE work
  * again. The included PCI bridges should be recovered after the PE
  * encounters frozen state.
  */
-void
-rtas_configure_bridge(struct pci_dn *pdn)
+void eeh_configure_bridge(struct pci_dn *pdn)
 {
         int config_addr;
         int rc;
@@ -1069,7 +1065,7 @@ struct eeh_early_enable_info {
 };
 
 /**
- * get_pe_addr - Retrieve PE address with given BDF address
+ * eeh_get_pe_addr - Retrieve PE address with given BDF address
  * @config_addr: BDF address
  * @info: BUID of the associated PHB
  *
@@ -1079,7 +1075,7 @@ struct eeh_early_enable_info {
  * the given BDF address. Further more, we prefer PE address on BDF
  * address in EEH core components.
  */
-static int get_pe_addr(int config_addr,
+static int eeh_get_pe_addr(int config_addr,
                         struct eeh_early_enable_info *info)
 {
         unsigned int rets[3];
@@ -1112,7 +1108,7 @@ static int get_pe_addr(int config_addr,
 }
 
 /**
- * early_enable_eeh - Early enable EEH on the indicated device
+ * eeh_early_enable - Early enable EEH on the indicated device
  * @dn: device node
  * @data: BUID
  *
@@ -1120,7 +1116,7 @@ static int get_pe_addr(int config_addr,
  * is expected to be called before real PCI probing is done. However,
  * the PHBs have been initialized at this point.
  */
-static void *early_enable_eeh(struct device_node *dn, void *data)
+static void *eeh_early_enable(struct device_node *dn, void *data)
 {
         unsigned int rets[3];
         struct eeh_early_enable_info *info = data;
@@ -1170,14 +1166,14 @@ static void *early_enable_eeh(struct device_node *dn, void *data)
                         /* If the newer, better, ibm,get-config-addr-info is supported, 
                          * then use that instead.
                          */
-                        pdn->eeh_pe_config_addr = get_pe_addr(pdn->eeh_config_addr, info);
+                        pdn->eeh_pe_config_addr = eeh_get_pe_addr(pdn->eeh_config_addr, info);
 
                         /* Some older systems (Power4) allow the
                          * ibm,set-eeh-option call to succeed even on nodes
                          * where EEH is not supported. Verify support
                          * explicitly.
                          */
-                        ret = read_slot_reset_state(pdn, rets);
+                        ret = eeh_read_slot_reset_state(pdn, rets);
                         if ((ret == 0) && (rets[1] == 1))
                                 enable = 1;
                 }
@@ -1272,7 +1268,7 @@ void __init eeh_init(void)
 
                 info.buid_lo = BUID_LO(buid);
                 info.buid_hi = BUID_HI(buid);
-                traverse_pci_devices(phb, early_enable_eeh, &info);
+                traverse_pci_devices(phb, eeh_early_enable, &info);
         }
 
         if (eeh_subsystem_enabled)
@@ -1308,7 +1304,7 @@ static void eeh_add_device_early(struct device_node *dn)
 
         info.buid_hi = BUID_HI(phb->buid);
         info.buid_lo = BUID_LO(phb->buid);
-        early_enable_eeh(dn, &info);
+        eeh_early_enable(dn, &info);
 }
 
 /**
diff --git a/arch/powerpc/platforms/pseries/eeh_driver.c b/arch/powerpc/platforms/pseries/eeh_driver.c
index 1b6cb10589e0..5315350bf1a0 100644
--- a/arch/powerpc/platforms/pseries/eeh_driver.c
+++ b/arch/powerpc/platforms/pseries/eeh_driver.c
@@ -282,7 +282,7 @@ static int eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus)
         /* Reset the pci controller. (Asserts RST#; resets config space).
          * Reconfigure bridges and devices. Don't try to bring the system
          * up if the reset failed for some reason. */
-        rc = rtas_set_slot_reset(pe_dn);
+        rc = eeh_reset_pe(pe_dn);
         if (rc)
                 return rc;
 
@@ -295,7 +295,7 @@ static int eeh_reset_device (struct pci_dn *pe_dn, struct pci_bus *bus)
                 struct pci_dn *ppe = PCI_DN(dn);
                 /* On Power4, always true because eeh_pe_config_addr=0 */
                 if (pe_dn->eeh_pe_config_addr == ppe->eeh_pe_config_addr) {
-                        rtas_configure_bridge(ppe);
+                        eeh_configure_bridge(ppe);
                         eeh_restore_bars(ppe);
                 }
                 dn = dn->sibling;
@@ -330,7 +330,7 @@ struct pci_dn * handle_eeh_events (struct eeh_event *event)
         enum pci_ers_result result = PCI_ERS_RESULT_NONE;
         const char *location, *pci_str, *drv_str, *bus_pci_str, *bus_drv_str;
 
-        frozen_dn = find_device_pe(event->dn);
+        frozen_dn = eeh_find_device_pe(event->dn);
         if (!frozen_dn) {
 
                 location = of_get_property(event->dn, "ibm,loc-code", NULL);
@@ -422,7 +422,7 @@ struct pci_dn * handle_eeh_events (struct eeh_event *event)
 
         /* If all devices reported they can proceed, then re-enable MMIO */
         if (result == PCI_ERS_RESULT_CAN_RECOVER) {
-                rc = rtas_pci_enable(frozen_pdn, EEH_THAW_MMIO);
+                rc = eeh_pci_enable(frozen_pdn, EEH_THAW_MMIO);
 
                 if (rc < 0)
                         goto hard_fail;
@@ -436,7 +436,7 @@ struct pci_dn * handle_eeh_events (struct eeh_event *event)
 
         /* If all devices reported they can proceed, then re-enable DMA */
         if (result == PCI_ERS_RESULT_CAN_RECOVER) {
-                rc = rtas_pci_enable(frozen_pdn, EEH_THAW_DMA);
+                rc = eeh_pci_enable(frozen_pdn, EEH_THAW_DMA);
 
                 if (rc < 0)
                         goto hard_fail;
diff --git a/arch/powerpc/platforms/pseries/msi.c b/arch/powerpc/platforms/pseries/msi.c
index 38d24e7e7bb1..109fdb75578d 100644
--- a/arch/powerpc/platforms/pseries/msi.c
+++ b/arch/powerpc/platforms/pseries/msi.c
@@ -217,7 +217,7 @@ static struct device_node *find_pe_dn(struct pci_dev *dev, int *total)
         if (!dn)
                 return NULL;
 
-        dn = find_device_pe(dn);
+        dn = eeh_find_device_pe(dn);
         if (!dn)
                 return NULL;