From: Stephen Rothwell Date: Fri, 19 May 2006 06:42:49 +0000 (+1000) Subject: [PATCH] powerpc: tidy up iseries/pci.c X-Git-Tag: firefly_0821_release~35458^2~225^2~96 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=b58b7f98670ab6dd7774b67ff1655a787321209f;p=firefly-linux-kernel-4.4.55.git [PATCH] powerpc: tidy up iseries/pci.c Remove some unused counters. No need to allocate iomm_table and iobar_table, which means that iomm_table_initialize is not longer needed. Use kzalloc where sensible. Signed-off-by: Stephen Rothwell Signed-off-by: Paul Mackerras --- diff --git a/arch/powerpc/platforms/iseries/pci.c b/arch/powerpc/platforms/iseries/pci.c index 428ffb5cf044..91a94747eda9 100644 --- a/arch/powerpc/platforms/iseries/pci.c +++ b/arch/powerpc/platforms/iseries/pci.c @@ -57,15 +57,6 @@ LIST_HEAD(iSeries_Global_Device_List); static int DeviceCount; -/* Counters and control flags. */ -static long Pci_Io_Read_Count; -static long Pci_Io_Write_Count; -#if 0 -static long Pci_Cfg_Read_Count; -static long Pci_Cfg_Write_Count; -#endif -static long Pci_Error_Count; - static int Pci_Retry_Max = 3; /* Only retry 3 times */ static int Pci_Error_Flag = 1; /* Set Retry Error on. */ @@ -79,40 +70,18 @@ static struct pci_ops iSeries_pci_ops; #define IOMM_TABLE_ENTRY_SIZE 0x0000000000400000UL #define BASE_IO_MEMORY 0xE000000000000000UL -static unsigned long max_io_memory = 0xE000000000000000UL; +static unsigned long max_io_memory = BASE_IO_MEMORY; static long current_iomm_table_entry; /* * Lookup Tables. */ -static struct device_node **iomm_table; -static u8 *iobar_table; +static struct device_node *iomm_table[IOMM_TABLE_MAX_ENTRIES]; +static u8 iobar_table[IOMM_TABLE_MAX_ENTRIES]; -/* - * Static and Global variables - */ -static char *pci_io_text = "iSeries PCI I/O"; +static const char pci_io_text[] = "iSeries PCI I/O"; static DEFINE_SPINLOCK(iomm_table_lock); -/* - * iomm_table_initialize - * - * Allocates and initalizes the Address Translation Table and Bar - * Tables to get them ready for use. Must be called before any - * I/O space is handed out to the device BARs. - */ -static void iomm_table_initialize(void) -{ - spin_lock(&iomm_table_lock); - iomm_table = kmalloc(sizeof(*iomm_table) * IOMM_TABLE_MAX_ENTRIES, - GFP_KERNEL); - iobar_table = kmalloc(sizeof(*iobar_table) * IOMM_TABLE_MAX_ENTRIES, - GFP_KERNEL); - spin_unlock(&iomm_table_lock); - if ((iomm_table == NULL) || (iobar_table == NULL)) - panic("PCI: I/O tables allocation failed.\n"); -} - /* * iomm_table_allocate_entry * @@ -140,9 +109,8 @@ static void iomm_table_allocate_entry(struct pci_dev *dev, int bar_num) */ spin_lock(&iomm_table_lock); bar_res->name = pci_io_text; - bar_res->start = + bar_res->start = BASE_IO_MEMORY + IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry; - bar_res->start += BASE_IO_MEMORY; bar_res->end = bar_res->start + bar_size - 1; /* * Allocate the number of table entries needed for BAR. @@ -154,7 +122,7 @@ static void iomm_table_allocate_entry(struct pci_dev *dev, int bar_num) ++current_iomm_table_entry; } max_io_memory = BASE_IO_MEMORY + - (IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry); + IOMM_TABLE_ENTRY_SIZE * current_iomm_table_entry; spin_unlock(&iomm_table_lock); } @@ -171,13 +139,10 @@ static void iomm_table_allocate_entry(struct pci_dev *dev, int bar_num) */ static void allocate_device_bars(struct pci_dev *dev) { - struct resource *bar_res; int bar_num; - for (bar_num = 0; bar_num <= PCI_ROM_RESOURCE; ++bar_num) { - bar_res = &dev->resource[bar_num]; + for (bar_num = 0; bar_num <= PCI_ROM_RESOURCE; ++bar_num) iomm_table_allocate_entry(dev, bar_num); - } } /* @@ -205,10 +170,9 @@ static struct device_node *build_device_node(HvBusNumber Bus, struct device_node *node; struct pci_dn *pdn; - node = kmalloc(sizeof(struct device_node), GFP_KERNEL); + node = kzalloc(sizeof(struct device_node), GFP_KERNEL); if (node == NULL) return NULL; - memset(node, 0, sizeof(struct device_node)); pdn = kzalloc(sizeof(*pdn), GFP_KERNEL); if (pdn == NULL) { kfree(node); @@ -224,7 +188,7 @@ static struct device_node *build_device_node(HvBusNumber Bus, } /* - * unsigned long __init find_and_init_phbs(void) + * iSeries_pcibios_init * * Description: * This function checks for all possible system PCI host bridges that connect @@ -232,7 +196,7 @@ static struct device_node *build_device_node(HvBusNumber Bus, * ownership status. A pci_controller is built for any bus which is partially * owned or fully owned by this guest partition. */ -unsigned long __init find_and_init_phbs(void) +void iSeries_pcibios_init(void) { struct pci_controller *phb; HvBusNumber bus; @@ -263,18 +227,6 @@ unsigned long __init find_and_init_phbs(void) printk(KERN_ERR "Unexpected Return on Probe(0x%04X): 0x%04X", bus, ret); } - return 0; -} - -/* - * iSeries_pcibios_init - * - * Chance to initialize and structures or variable before PCI Bus walk. - */ -void iSeries_pcibios_init(void) -{ - iomm_table_initialize(); - find_and_init_phbs(); } /* @@ -331,8 +283,7 @@ static void scan_PHB_slots(struct pci_controller *Phb) int IdSel; const int MaxAgents = 8; - DevInfo = (struct HvCallPci_DeviceInfo*) - kmalloc(sizeof(struct HvCallPci_DeviceInfo), GFP_KERNEL); + DevInfo = kmalloc(sizeof(struct HvCallPci_DeviceInfo), GFP_KERNEL); if (DevInfo == NULL) return; @@ -622,7 +573,6 @@ static int CheckReturnCode(char *TextHdr, struct device_node *DevNode, if (ret != 0) { struct pci_dn *pdn = PCI_DN(DevNode); - ++Pci_Error_Count; (*retry)++; printk("PCI: %s: Device 0x%04X:%02X I/O Error(%2d): 0x%04X\n", TextHdr, pdn->busno, pdn->devfn, @@ -704,7 +654,6 @@ u8 iSeries_Read_Byte(const volatile void __iomem *IoAddress) return 0xff; } do { - ++Pci_Io_Read_Count; HvCall3Ret16(HvCallPciBarLoad8, &ret, dsa, BarOffset, 0); } while (CheckReturnCode("RDB", DevNode, &retry, ret.rc) != 0); @@ -734,7 +683,6 @@ u16 iSeries_Read_Word(const volatile void __iomem *IoAddress) return 0xffff; } do { - ++Pci_Io_Read_Count; HvCall3Ret16(HvCallPciBarLoad16, &ret, dsa, BarOffset, 0); } while (CheckReturnCode("RDW", DevNode, &retry, ret.rc) != 0); @@ -765,7 +713,6 @@ u32 iSeries_Read_Long(const volatile void __iomem *IoAddress) return 0xffffffff; } do { - ++Pci_Io_Read_Count; HvCall3Ret16(HvCallPciBarLoad32, &ret, dsa, BarOffset, 0); } while (CheckReturnCode("RDL", DevNode, &retry, ret.rc) != 0); @@ -803,7 +750,6 @@ void iSeries_Write_Byte(u8 data, volatile void __iomem *IoAddress) return; } do { - ++Pci_Io_Write_Count; rc = HvCall4(HvCallPciBarStore8, dsa, BarOffset, data, 0); } while (CheckReturnCode("WWB", DevNode, &retry, rc) != 0); } @@ -831,7 +777,6 @@ void iSeries_Write_Word(u16 data, volatile void __iomem *IoAddress) return; } do { - ++Pci_Io_Write_Count; rc = HvCall4(HvCallPciBarStore16, dsa, BarOffset, swab16(data), 0); } while (CheckReturnCode("WWW", DevNode, &retry, rc) != 0); } @@ -859,7 +804,6 @@ void iSeries_Write_Long(u32 data, volatile void __iomem *IoAddress) return; } do { - ++Pci_Io_Write_Count; rc = HvCall4(HvCallPciBarStore32, dsa, BarOffset, swab32(data), 0); } while (CheckReturnCode("WWL", DevNode, &retry, rc) != 0); }