diff options
Diffstat (limited to 'arch/powerpc/platforms')
39 files changed, 940 insertions, 119 deletions
diff --git a/arch/powerpc/platforms/44x/Kconfig b/arch/powerpc/platforms/44x/Kconfig index 1624ebf95497..35a1f4b9f827 100644 --- a/arch/powerpc/platforms/44x/Kconfig +++ b/arch/powerpc/platforms/44x/Kconfig @@ -173,6 +173,7 @@ config ISS4xx config CURRITUCK bool "IBM Currituck (476fpe) Support" depends on PPC_47x + select I2C select SWIOTLB select 476FPE select FORCE_PCI diff --git a/arch/powerpc/platforms/44x/idle.c b/arch/powerpc/platforms/44x/idle.c index f533b495e7db..e2eeef8dff78 100644 --- a/arch/powerpc/platforms/44x/idle.c +++ b/arch/powerpc/platforms/44x/idle.c @@ -27,7 +27,7 @@ static void ppc44x_idle(void) isync(); } -int __init ppc44x_idle_init(void) +static int __init ppc44x_idle_init(void) { if (!mode_spin) { /* If we are not setting spin mode diff --git a/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c b/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c index 6f08d07aee3b..e995eb30bf09 100644 --- a/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c +++ b/arch/powerpc/platforms/512x/mpc5121_ads_cpld.c @@ -17,6 +17,8 @@ #include <linux/of_address.h> #include <linux/of_irq.h> +#include "mpc5121_ads.h" + static struct device_node *cpld_pic_node; static struct irq_domain *cpld_pic_host; diff --git a/arch/powerpc/platforms/512x/pdm360ng.c b/arch/powerpc/platforms/512x/pdm360ng.c index ce51cfeeb066..8bbbf78bb42b 100644 --- a/arch/powerpc/platforms/512x/pdm360ng.c +++ b/arch/powerpc/platforms/512x/pdm360ng.c @@ -101,7 +101,7 @@ static inline void __init pdm360ng_touchscreen_init(void) } #endif /* CONFIG_TOUCHSCREEN_ADS7846 */ -void __init pdm360ng_init(void) +static void __init pdm360ng_init(void) { mpc512x_init(); pdm360ng_touchscreen_init(); diff --git a/arch/powerpc/platforms/83xx/suspend.c b/arch/powerpc/platforms/83xx/suspend.c index 9833c36bda83..c9664e46b03d 100644 --- a/arch/powerpc/platforms/83xx/suspend.c +++ b/arch/powerpc/platforms/83xx/suspend.c @@ -261,9 +261,10 @@ static int mpc83xx_suspend_begin(suspend_state_t state) static int agent_thread_fn(void *data) { + set_freezable(); + while (1) { - wait_event_interruptible(agent_wq, pci_pm_state >= 2); - try_to_freeze(); + wait_event_freezable(agent_wq, pci_pm_state >= 2); if (signal_pending(current) || pci_pm_state < 2) continue; diff --git a/arch/powerpc/platforms/85xx/mpc8536_ds.c b/arch/powerpc/platforms/85xx/mpc8536_ds.c index e966b2ad8ecd..b3327a358eb4 100644 --- a/arch/powerpc/platforms/85xx/mpc8536_ds.c +++ b/arch/powerpc/platforms/85xx/mpc8536_ds.c @@ -27,7 +27,7 @@ #include "mpc85xx.h" -void __init mpc8536_ds_pic_init(void) +static void __init mpc8536_ds_pic_init(void) { struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN, 0, 256, " OpenPIC "); diff --git a/arch/powerpc/platforms/85xx/mpc85xx_rdb.c b/arch/powerpc/platforms/85xx/mpc85xx_rdb.c index ec9f60fbebc7..e0cec670d8db 100644 --- a/arch/powerpc/platforms/85xx/mpc85xx_rdb.c +++ b/arch/powerpc/platforms/85xx/mpc85xx_rdb.c @@ -76,7 +76,7 @@ static void __init mpc85xx_rdb_setup_arch(void) /* P1025 has pins muxed for QE and other functions. To * enable QE UEC mode, we need to set bit QE0 for UCC1 * in Eth mode, QE0 and QE3 for UCC5 in Eth mode, QE9 - * and QE12 for QE MII management singals in PMUXCR + * and QE12 for QE MII management signals in PMUXCR * register. */ setbits32(&guts->pmuxcr, MPC85xx_PMUXCR_QE(0) | diff --git a/arch/powerpc/platforms/85xx/mvme2500.c b/arch/powerpc/platforms/85xx/mvme2500.c index 1b59e45a0c64..19122daadb55 100644 --- a/arch/powerpc/platforms/85xx/mvme2500.c +++ b/arch/powerpc/platforms/85xx/mvme2500.c @@ -21,7 +21,7 @@ #include "mpc85xx.h" -void __init mvme2500_pic_init(void) +static void __init mvme2500_pic_init(void) { struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU, diff --git a/arch/powerpc/platforms/85xx/p1010rdb.c b/arch/powerpc/platforms/85xx/p1010rdb.c index 10d6f1fa3327..491895ac8bcf 100644 --- a/arch/powerpc/platforms/85xx/p1010rdb.c +++ b/arch/powerpc/platforms/85xx/p1010rdb.c @@ -24,7 +24,7 @@ #include "mpc85xx.h" -void __init p1010_rdb_pic_init(void) +static void __init p1010_rdb_pic_init(void) { struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU, diff --git a/arch/powerpc/platforms/85xx/p1022_ds.c b/arch/powerpc/platforms/85xx/p1022_ds.c index 0dd786a061a6..adc3a2ee1415 100644 --- a/arch/powerpc/platforms/85xx/p1022_ds.c +++ b/arch/powerpc/platforms/85xx/p1022_ds.c @@ -370,7 +370,7 @@ exit: * * @pixclock: the wavelength, in picoseconds, of the clock */ -void p1022ds_set_pixel_clock(unsigned int pixclock) +static void p1022ds_set_pixel_clock(unsigned int pixclock) { struct device_node *guts_np = NULL; struct ccsr_guts __iomem *guts; @@ -418,7 +418,7 @@ void p1022ds_set_pixel_clock(unsigned int pixclock) /** * p1022ds_valid_monitor_port: set the monitor port for sysfs */ -enum fsl_diu_monitor_port +static enum fsl_diu_monitor_port p1022ds_valid_monitor_port(enum fsl_diu_monitor_port port) { switch (port) { @@ -432,7 +432,7 @@ p1022ds_valid_monitor_port(enum fsl_diu_monitor_port port) #endif -void __init p1022_ds_pic_init(void) +static void __init p1022_ds_pic_init(void) { struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU, diff --git a/arch/powerpc/platforms/85xx/p1022_rdk.c b/arch/powerpc/platforms/85xx/p1022_rdk.c index 25ab6e9c1470..6198299d95b1 100644 --- a/arch/powerpc/platforms/85xx/p1022_rdk.c +++ b/arch/powerpc/platforms/85xx/p1022_rdk.c @@ -40,7 +40,7 @@ * * @pixclock: the wavelength, in picoseconds, of the clock */ -void p1022rdk_set_pixel_clock(unsigned int pixclock) +static void p1022rdk_set_pixel_clock(unsigned int pixclock) { struct device_node *guts_np = NULL; struct ccsr_guts __iomem *guts; @@ -88,7 +88,7 @@ void p1022rdk_set_pixel_clock(unsigned int pixclock) /** * p1022rdk_valid_monitor_port: set the monitor port for sysfs */ -enum fsl_diu_monitor_port +static enum fsl_diu_monitor_port p1022rdk_valid_monitor_port(enum fsl_diu_monitor_port port) { return FSL_DIU_PORT_DVI; @@ -96,7 +96,7 @@ p1022rdk_valid_monitor_port(enum fsl_diu_monitor_port port) #endif -void __init p1022_rdk_pic_init(void) +static void __init p1022_rdk_pic_init(void) { struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN | MPIC_SINGLE_DEST_CPU, diff --git a/arch/powerpc/platforms/85xx/socrates_fpga_pic.c b/arch/powerpc/platforms/85xx/socrates_fpga_pic.c index baa12eff6d5d..60e0b8947ce6 100644 --- a/arch/powerpc/platforms/85xx/socrates_fpga_pic.c +++ b/arch/powerpc/platforms/85xx/socrates_fpga_pic.c @@ -8,6 +8,8 @@ #include <linux/of_irq.h> #include <linux/io.h> +#include "socrates_fpga_pic.h" + /* * The FPGA supports 9 interrupt sources, which can be routed to 3 * interrupt request lines of the MPIC. The line to be used can be diff --git a/arch/powerpc/platforms/85xx/xes_mpc85xx.c b/arch/powerpc/platforms/85xx/xes_mpc85xx.c index 45f257fc1ade..2582427d8d01 100644 --- a/arch/powerpc/platforms/85xx/xes_mpc85xx.c +++ b/arch/powerpc/platforms/85xx/xes_mpc85xx.c @@ -37,7 +37,7 @@ #define MPC85xx_L2CTL_L2I 0x40000000 /* L2 flash invalidate */ #define MPC85xx_L2CTL_L2SIZ_MASK 0x30000000 /* L2 SRAM size (R/O) */ -void __init xes_mpc85xx_pic_init(void) +static void __init xes_mpc85xx_pic_init(void) { struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN, 0, 256, " OpenPIC "); diff --git a/arch/powerpc/platforms/86xx/Kconfig b/arch/powerpc/platforms/86xx/Kconfig index 67467cd6f34c..06b1e5c49d6f 100644 --- a/arch/powerpc/platforms/86xx/Kconfig +++ b/arch/powerpc/platforms/86xx/Kconfig @@ -52,10 +52,3 @@ config MPC8641 select MPIC default y if GEF_SBC610 || GEF_SBC310 || GEF_PPC9A \ || MVME7100 - -config MPC8610 - bool - select HAVE_PCI - select FSL_PCI if PCI - select PPC_UDBG_16550 - select MPIC diff --git a/arch/powerpc/platforms/cell/spufs/inode.c b/arch/powerpc/platforms/cell/spufs/inode.c index 10c1320adfd0..030de2b8c145 100644 --- a/arch/powerpc/platforms/cell/spufs/inode.c +++ b/arch/powerpc/platforms/cell/spufs/inode.c @@ -145,10 +145,11 @@ spufs_evict_inode(struct inode *inode) static void spufs_prune_dir(struct dentry *dir) { - struct dentry *dentry, *tmp; + struct dentry *dentry; + struct hlist_node *n; inode_lock(d_inode(dir)); - list_for_each_entry_safe(dentry, tmp, &dir->d_subdirs, d_child) { + hlist_for_each_entry_safe(dentry, n, &dir->d_children, d_sib) { spin_lock(&dentry->d_lock); if (simple_positive(dentry)) { dget_dlock(dentry); diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c index ef985ba2bf21..0761d98e5be3 100644 --- a/arch/powerpc/platforms/pasemi/setup.c +++ b/arch/powerpc/platforms/pasemi/setup.c @@ -64,7 +64,7 @@ static void __noreturn pas_restart(char *cmd) } #ifdef CONFIG_PPC_PASEMI_NEMO -void pas_shutdown(void) +static void pas_shutdown(void) { /* Set the PLD bit that makes the SB600 think the power button is being pressed */ void __iomem *pld_map = ioremap(0xf5000000,4096); diff --git a/arch/powerpc/platforms/powermac/smp.c b/arch/powerpc/platforms/powermac/smp.c index c83d1e14077e..15644be31990 100644 --- a/arch/powerpc/platforms/powermac/smp.c +++ b/arch/powerpc/platforms/powermac/smp.c @@ -413,7 +413,7 @@ static void __init smp_psurge_setup_cpu(int cpu_nr) printk(KERN_ERR "Couldn't get primary IPI interrupt"); } -void __init smp_psurge_take_timebase(void) +static void __init smp_psurge_take_timebase(void) { if (psurge_type != PSURGE_DUAL) return; @@ -429,7 +429,7 @@ void __init smp_psurge_take_timebase(void) set_dec(tb_ticks_per_jiffy/2); } -void __init smp_psurge_give_timebase(void) +static void __init smp_psurge_give_timebase(void) { /* Nothing to do here */ } diff --git a/arch/powerpc/platforms/powernv/opal-irqchip.c b/arch/powerpc/platforms/powernv/opal-irqchip.c index f9a7001dacb7..56a1f7ce78d2 100644 --- a/arch/powerpc/platforms/powernv/opal-irqchip.c +++ b/arch/powerpc/platforms/powernv/opal-irqchip.c @@ -275,6 +275,8 @@ int __init opal_event_init(void) else name = kasprintf(GFP_KERNEL, "opal"); + if (!name) + continue; /* Install interrupt handler */ rc = request_irq(r->start, opal_interrupt, r->flags & IRQD_TRIGGER_MASK, name, NULL); diff --git a/arch/powerpc/platforms/powernv/opal-powercap.c b/arch/powerpc/platforms/powernv/opal-powercap.c index 7bfe4cbeb35a..ea917266aa17 100644 --- a/arch/powerpc/platforms/powernv/opal-powercap.c +++ b/arch/powerpc/platforms/powernv/opal-powercap.c @@ -196,6 +196,12 @@ void __init opal_powercap_init(void) j = 0; pcaps[i].pg.name = kasprintf(GFP_KERNEL, "%pOFn", node); + if (!pcaps[i].pg.name) { + kfree(pcaps[i].pattrs); + kfree(pcaps[i].pg.attrs); + goto out_pcaps_pattrs; + } + if (has_min) { powercap_add_attr(min, "powercap-min", &pcaps[i].pattrs[j]); diff --git a/arch/powerpc/platforms/powernv/opal-prd.c b/arch/powerpc/platforms/powernv/opal-prd.c index 327e2f76905d..b66b06efcef1 100644 --- a/arch/powerpc/platforms/powernv/opal-prd.c +++ b/arch/powerpc/platforms/powernv/opal-prd.c @@ -66,6 +66,8 @@ static bool opal_prd_range_is_valid(uint64_t addr, uint64_t size) const char *label; addrp = of_get_address(node, 0, &range_size, NULL); + if (!addrp) + continue; range_addr = of_read_number(addrp, 2); range_end = range_addr + range_size; diff --git a/arch/powerpc/platforms/powernv/opal-xscom.c b/arch/powerpc/platforms/powernv/opal-xscom.c index 262cd6fac907..748c2b97fa53 100644 --- a/arch/powerpc/platforms/powernv/opal-xscom.c +++ b/arch/powerpc/platforms/powernv/opal-xscom.c @@ -165,6 +165,11 @@ static int scom_debug_init_one(struct dentry *root, struct device_node *dn, ent->chip = chip; snprintf(ent->name, 16, "%08x", chip); ent->path.data = (void *)kasprintf(GFP_KERNEL, "%pOF", dn); + if (!ent->path.data) { + kfree(ent); + return -ENOMEM; + } + ent->path.size = strlen((char *)ent->path.data); dir = debugfs_create_dir(ent->name, root); diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c index cdf3838f08d3..45dd77e3ccf6 100644 --- a/arch/powerpc/platforms/powernv/opal.c +++ b/arch/powerpc/platforms/powernv/opal.c @@ -424,7 +424,7 @@ static int __init opal_message_init(struct device_node *opal_node) return 0; } -int opal_get_chars(uint32_t vtermno, char *buf, int count) +ssize_t opal_get_chars(uint32_t vtermno, u8 *buf, size_t count) { s64 rc; __be64 evt, len; @@ -441,10 +441,11 @@ int opal_get_chars(uint32_t vtermno, char *buf, int count) return 0; } -static int __opal_put_chars(uint32_t vtermno, const char *data, int total_len, bool atomic) +static ssize_t __opal_put_chars(uint32_t vtermno, const u8 *data, + size_t total_len, bool atomic) { unsigned long flags = 0 /* shut up gcc */; - int written; + ssize_t written; __be64 olen; s64 rc; @@ -484,7 +485,7 @@ static int __opal_put_chars(uint32_t vtermno, const char *data, int total_len, b if (atomic) { /* Should not happen */ pr_warn("atomic console write returned partial " - "len=%d written=%d\n", total_len, written); + "len=%zu written=%zd\n", total_len, written); } if (!written) written = -EAGAIN; @@ -497,7 +498,7 @@ out: return written; } -int opal_put_chars(uint32_t vtermno, const char *data, int total_len) +ssize_t opal_put_chars(uint32_t vtermno, const u8 *data, size_t total_len) { return __opal_put_chars(vtermno, data, total_len, false); } @@ -508,7 +509,8 @@ int opal_put_chars(uint32_t vtermno, const char *data, int total_len) * true at the moment because console space can race with OPAL's console * writes. */ -int opal_put_chars_atomic(uint32_t vtermno, const char *data, int total_len) +ssize_t opal_put_chars_atomic(uint32_t vtermno, const u8 *data, + size_t total_len) { return __opal_put_chars(vtermno, data, total_len, true); } diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c index 28fac4770073..23f5b5093ec1 100644 --- a/arch/powerpc/platforms/powernv/pci-ioda.c +++ b/arch/powerpc/platforms/powernv/pci-ioda.c @@ -1389,7 +1389,7 @@ static long pnv_pci_ioda2_setup_default_config(struct pnv_ioda_pe *pe) * DMA window can be larger than available memory, which will * cause errors later. */ - const u64 maxblock = 1UL << (PAGE_SHIFT + MAX_ORDER); + const u64 maxblock = 1UL << (PAGE_SHIFT + MAX_PAGE_ORDER); /* * We create the default window as big as we can. The constraint is diff --git a/arch/powerpc/platforms/powernv/subcore.c b/arch/powerpc/platforms/powernv/subcore.c index 191424468f10..393e747541fb 100644 --- a/arch/powerpc/platforms/powernv/subcore.c +++ b/arch/powerpc/platforms/powernv/subcore.c @@ -425,7 +425,8 @@ static int subcore_init(void) if (pvr_ver != PVR_POWER8 && pvr_ver != PVR_POWER8E && - pvr_ver != PVR_POWER8NVL) + pvr_ver != PVR_POWER8NVL && + pvr_ver != PVR_HX_C2000) return 0; /* diff --git a/arch/powerpc/platforms/ps3/Kconfig b/arch/powerpc/platforms/ps3/Kconfig index a44869e5ea70..e9c1087dd42e 100644 --- a/arch/powerpc/platforms/ps3/Kconfig +++ b/arch/powerpc/platforms/ps3/Kconfig @@ -167,16 +167,4 @@ config PS3_LPM profiling support of the Cell processor with programs like perfmon2, then say Y or M, otherwise say N. -config PS3GELIC_UDBG - bool "PS3 udbg output via UDP broadcasts on Ethernet" - depends on PPC_PS3 - help - Enables udbg early debugging output by sending broadcast UDP - via the Ethernet port (UDP port number 18194). - - This driver uses a trivial implementation and is independent - from the main PS3 gelic network driver. - - If in doubt, say N here. - endmenu diff --git a/arch/powerpc/platforms/ps3/Makefile b/arch/powerpc/platforms/ps3/Makefile index 86bf2967a8d4..bc79bb124d1e 100644 --- a/arch/powerpc/platforms/ps3/Makefile +++ b/arch/powerpc/platforms/ps3/Makefile @@ -3,7 +3,7 @@ obj-y += setup.o mm.o time.o hvcall.o htab.o repository.o obj-y += interrupt.o exports.o os-area.o obj-y += system-bus.o -obj-$(CONFIG_PS3GELIC_UDBG) += gelic_udbg.o +obj-$(CONFIG_PPC_EARLY_DEBUG_PS3GELIC) += gelic_udbg.o obj-$(CONFIG_SMP) += smp.o obj-$(CONFIG_SPU_BASE) += spu.o obj-y += device-init.o diff --git a/arch/powerpc/platforms/ps3/device-init.c b/arch/powerpc/platforms/ps3/device-init.c index e87360a0fb40..878bc160246e 100644 --- a/arch/powerpc/platforms/ps3/device-init.c +++ b/arch/powerpc/platforms/ps3/device-init.c @@ -827,6 +827,7 @@ static int ps3_probe_thread(void *data) if (res) goto fail_free_irq; + set_freezable(); /* Loop here processing the requested notification events. */ do { try_to_freeze(); diff --git a/arch/powerpc/platforms/ps3/gelic_udbg.c b/arch/powerpc/platforms/ps3/gelic_udbg.c index 6b298010fd84..a5202c18c236 100644 --- a/arch/powerpc/platforms/ps3/gelic_udbg.c +++ b/arch/powerpc/platforms/ps3/gelic_udbg.c @@ -14,6 +14,7 @@ #include <linux/ip.h> #include <linux/udp.h> +#include <asm/ps3.h> #include <asm/io.h> #include <asm/udbg.h> #include <asm/lv1call.h> diff --git a/arch/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile index 1476c5e4433c..f936962a2946 100644 --- a/arch/powerpc/platforms/pseries/Makefile +++ b/arch/powerpc/platforms/pseries/Makefile @@ -4,6 +4,7 @@ ccflags-$(CONFIG_PPC_PSERIES_DEBUG) += -DDEBUG obj-y := lpar.o hvCall.o nvram.o reconfig.o \ of_helpers.o rtas-work-area.o papr-sysparm.o \ + papr-vpd.o \ setup.o iommu.o event_sources.o ras.o \ firmware.o power.o dlpar.o mobility.o rng.o \ pci.o pci_dlpar.o eeh_pseries.o msi.o \ diff --git a/arch/powerpc/platforms/pseries/eeh_pseries.c b/arch/powerpc/platforms/pseries/eeh_pseries.c index def184da51cf..b1ae0c0d1187 100644 --- a/arch/powerpc/platforms/pseries/eeh_pseries.c +++ b/arch/powerpc/platforms/pseries/eeh_pseries.c @@ -252,7 +252,7 @@ static int pseries_eeh_cap_start(struct pci_dn *pdn) if (!pdn) return 0; - rtas_read_config(pdn, PCI_STATUS, 2, &status); + rtas_pci_dn_read_config(pdn, PCI_STATUS, 2, &status); if (!(status & PCI_STATUS_CAP_LIST)) return 0; @@ -270,11 +270,11 @@ static int pseries_eeh_find_cap(struct pci_dn *pdn, int cap) return 0; while (cnt--) { - rtas_read_config(pdn, pos, 1, &pos); + rtas_pci_dn_read_config(pdn, pos, 1, &pos); if (pos < 0x40) break; pos &= ~3; - rtas_read_config(pdn, pos + PCI_CAP_LIST_ID, 1, &id); + rtas_pci_dn_read_config(pdn, pos + PCI_CAP_LIST_ID, 1, &id); if (id == 0xff) break; if (id == cap) @@ -294,7 +294,7 @@ static int pseries_eeh_find_ecap(struct pci_dn *pdn, int cap) if (!edev || !edev->pcie_cap) return 0; - if (rtas_read_config(pdn, pos, 4, &header) != PCIBIOS_SUCCESSFUL) + if (rtas_pci_dn_read_config(pdn, pos, 4, &header) != PCIBIOS_SUCCESSFUL) return 0; else if (!header) return 0; @@ -307,7 +307,7 @@ static int pseries_eeh_find_ecap(struct pci_dn *pdn, int cap) if (pos < 256) break; - if (rtas_read_config(pdn, pos, 4, &header) != PCIBIOS_SUCCESSFUL) + if (rtas_pci_dn_read_config(pdn, pos, 4, &header) != PCIBIOS_SUCCESSFUL) break; } @@ -412,8 +412,8 @@ static void pseries_eeh_init_edev(struct pci_dn *pdn) if ((pdn->class_code >> 8) == PCI_CLASS_BRIDGE_PCI) { edev->mode |= EEH_DEV_BRIDGE; if (edev->pcie_cap) { - rtas_read_config(pdn, edev->pcie_cap + PCI_EXP_FLAGS, - 2, &pcie_flags); + rtas_pci_dn_read_config(pdn, edev->pcie_cap + PCI_EXP_FLAGS, + 2, &pcie_flags); pcie_flags = (pcie_flags & PCI_EXP_FLAGS_TYPE) >> 4; if (pcie_flags == PCI_EXP_TYPE_ROOT_PORT) edev->mode |= EEH_DEV_ROOT_PORT; @@ -676,7 +676,7 @@ static int pseries_eeh_read_config(struct eeh_dev *edev, int where, int size, u3 { struct pci_dn *pdn = eeh_dev_to_pdn(edev); - return rtas_read_config(pdn, where, size, val); + return rtas_pci_dn_read_config(pdn, where, size, val); } /** @@ -692,7 +692,7 @@ static int pseries_eeh_write_config(struct eeh_dev *edev, int where, int size, u { struct pci_dn *pdn = eeh_dev_to_pdn(edev); - return rtas_write_config(pdn, where, size, val); + return rtas_pci_dn_write_config(pdn, where, size, val); } #ifdef CONFIG_PCI_IOV diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c index a43bfb01720a..3fe3ddb30c04 100644 --- a/arch/powerpc/platforms/pseries/hotplug-memory.c +++ b/arch/powerpc/platforms/pseries/hotplug-memory.c @@ -208,8 +208,10 @@ static int dlpar_change_lmb_state(struct drmem_lmb *lmb, bool online) int rc; mem_block = lmb_to_memblock(lmb); - if (!mem_block) + if (!mem_block) { + pr_err("Failed memory block lookup for LMB 0x%x\n", lmb->drc_index); return -EINVAL; + } if (online && mem_block->dev.offline) rc = device_online(&mem_block->dev); @@ -436,14 +438,15 @@ static int dlpar_memory_remove_by_index(u32 drc_index) } } - if (!lmb_found) + if (!lmb_found) { + pr_debug("Failed to look up LMB for drc index %x\n", drc_index); rc = -EINVAL; - - if (rc) + } else if (rc) { pr_debug("Failed to hot-remove memory at %llx\n", lmb->base_addr); - else + } else { pr_debug("Memory at %llx was hot-removed\n", lmb->base_addr); + } return rc; } @@ -575,6 +578,7 @@ static int dlpar_add_lmb(struct drmem_lmb *lmb) rc = update_lmb_associativity_index(lmb); if (rc) { dlpar_release_drc(lmb->drc_index); + pr_err("Failed to configure LMB 0x%x\n", lmb->drc_index); return rc; } @@ -588,12 +592,14 @@ static int dlpar_add_lmb(struct drmem_lmb *lmb) /* Add the memory */ rc = __add_memory(nid, lmb->base_addr, block_sz, MHP_MEMMAP_ON_MEMORY); if (rc) { + pr_err("Failed to add LMB 0x%x to node %u", lmb->drc_index, nid); invalidate_lmb_associativity_index(lmb); return rc; } rc = dlpar_online_lmb(lmb); if (rc) { + pr_err("Failed to online LMB 0x%x on node %u\n", lmb->drc_index, nid); __remove_memory(lmb->base_addr, block_sz); invalidate_lmb_associativity_index(lmb); } else { diff --git a/arch/powerpc/platforms/pseries/hvconsole.c b/arch/powerpc/platforms/pseries/hvconsole.c index 1ac52963e08b..8803c947998e 100644 --- a/arch/powerpc/platforms/pseries/hvconsole.c +++ b/arch/powerpc/platforms/pseries/hvconsole.c @@ -25,7 +25,7 @@ * firmware. * @count: not used? */ -int hvc_get_chars(uint32_t vtermno, char *buf, int count) +ssize_t hvc_get_chars(uint32_t vtermno, u8 *buf, size_t count) { long ret; unsigned long retbuf[PLPAR_HCALL_BUFSIZE]; @@ -52,7 +52,7 @@ EXPORT_SYMBOL(hvc_get_chars); * firmware. Must be at least 16 bytes, even if count is less than 16. * @count: Send this number of characters. */ -int hvc_put_chars(uint32_t vtermno, const char *buf, int count) +ssize_t hvc_put_chars(uint32_t vtermno, const u8 *buf, size_t count) { unsigned long *lbuf = (unsigned long *) buf; long ret; diff --git a/arch/powerpc/platforms/pseries/iommu.c b/arch/powerpc/platforms/pseries/iommu.c index 496e16c588aa..e8c4129697b1 100644 --- a/arch/powerpc/platforms/pseries/iommu.c +++ b/arch/powerpc/platforms/pseries/iommu.c @@ -574,29 +574,6 @@ static void iommu_table_setparms(struct pci_controller *phb, struct iommu_table_ops iommu_table_lpar_multi_ops; -/* - * iommu_table_setparms_lpar - * - * Function: On pSeries LPAR systems, return TCE table info, given a pci bus. - */ -static void iommu_table_setparms_lpar(struct pci_controller *phb, - struct device_node *dn, - struct iommu_table *tbl, - struct iommu_table_group *table_group, - const __be32 *dma_window) -{ - unsigned long offset, size, liobn; - - of_parse_dma_window(dn, dma_window, &liobn, &offset, &size); - - iommu_table_setparms_common(tbl, phb->bus->number, liobn, offset, size, IOMMU_PAGE_SHIFT_4K, NULL, - &iommu_table_lpar_multi_ops); - - - table_group->tce32_start = offset; - table_group->tce32_size = size; -} - struct iommu_table_ops iommu_table_pseries_ops = { .set = tce_build_pSeries, .clear = tce_free_pSeries, @@ -724,26 +701,71 @@ struct iommu_table_ops iommu_table_lpar_multi_ops = { * dynamic 64bit DMA window, walking up the device tree. */ static struct device_node *pci_dma_find(struct device_node *dn, - const __be32 **dma_window) + struct dynamic_dma_window_prop *prop) { - const __be32 *dw = NULL; + const __be32 *default_prop = NULL; + const __be32 *ddw_prop = NULL; + struct device_node *rdn = NULL; + bool default_win = false, ddw_win = false; for ( ; dn && PCI_DN(dn); dn = dn->parent) { - dw = of_get_property(dn, "ibm,dma-window", NULL); - if (dw) { - if (dma_window) - *dma_window = dw; - return dn; + default_prop = of_get_property(dn, "ibm,dma-window", NULL); + if (default_prop) { + rdn = dn; + default_win = true; + } + ddw_prop = of_get_property(dn, DIRECT64_PROPNAME, NULL); + if (ddw_prop) { + rdn = dn; + ddw_win = true; + break; + } + ddw_prop = of_get_property(dn, DMA64_PROPNAME, NULL); + if (ddw_prop) { + rdn = dn; + ddw_win = true; + break; } - dw = of_get_property(dn, DIRECT64_PROPNAME, NULL); - if (dw) - return dn; - dw = of_get_property(dn, DMA64_PROPNAME, NULL); - if (dw) - return dn; + + /* At least found default window, which is the case for normal boot */ + if (default_win) + break; } - return NULL; + /* For PCI devices there will always be a DMA window, either on the device + * or parent bus + */ + WARN_ON(!(default_win | ddw_win)); + + /* caller doesn't want to get DMA window property */ + if (!prop) + return rdn; + + /* parse DMA window property. During normal system boot, only default + * DMA window is passed in OF. But, for kdump, a dedicated adapter might + * have both default and DDW in FDT. In this scenario, DDW takes precedence + * over default window. + */ + if (ddw_win) { + struct dynamic_dma_window_prop *p; + + p = (struct dynamic_dma_window_prop *)ddw_prop; + prop->liobn = p->liobn; + prop->dma_base = p->dma_base; + prop->tce_shift = p->tce_shift; + prop->window_shift = p->window_shift; + } else if (default_win) { + unsigned long offset, size, liobn; + + of_parse_dma_window(rdn, default_prop, &liobn, &offset, &size); + + prop->liobn = cpu_to_be32((u32)liobn); + prop->dma_base = cpu_to_be64(offset); + prop->tce_shift = cpu_to_be32(IOMMU_PAGE_SHIFT_4K); + prop->window_shift = cpu_to_be32(order_base_2(size)); + } + + return rdn; } static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus) @@ -751,17 +773,20 @@ static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus) struct iommu_table *tbl; struct device_node *dn, *pdn; struct pci_dn *ppci; - const __be32 *dma_window = NULL; + struct dynamic_dma_window_prop prop; dn = pci_bus_to_OF_node(bus); pr_debug("pci_dma_bus_setup_pSeriesLP: setting up bus %pOF\n", dn); - pdn = pci_dma_find(dn, &dma_window); + pdn = pci_dma_find(dn, &prop); - if (dma_window == NULL) - pr_debug(" no ibm,dma-window property !\n"); + /* In PPC architecture, there will always be DMA window on bus or one of the + * parent bus. During reboot, there will be ibm,dma-window property to + * define DMA window. For kdump, there will at least be default window or DDW + * or both. + */ ppci = PCI_DN(pdn); @@ -771,13 +796,24 @@ static void pci_dma_bus_setup_pSeriesLP(struct pci_bus *bus) if (!ppci->table_group) { ppci->table_group = iommu_pseries_alloc_group(ppci->phb->node); tbl = ppci->table_group->tables[0]; - if (dma_window) { - iommu_table_setparms_lpar(ppci->phb, pdn, tbl, - ppci->table_group, dma_window); - if (!iommu_init_table(tbl, ppci->phb->node, 0, 0)) - panic("Failed to initialize iommu table"); - } + iommu_table_setparms_common(tbl, ppci->phb->bus->number, + be32_to_cpu(prop.liobn), + be64_to_cpu(prop.dma_base), + 1ULL << be32_to_cpu(prop.window_shift), + be32_to_cpu(prop.tce_shift), NULL, + &iommu_table_lpar_multi_ops); + + /* Only for normal boot with default window. Doesn't matter even + * if we set these with DDW which is 64bit during kdump, since + * these will not be used during kdump. + */ + ppci->table_group->tce32_start = be64_to_cpu(prop.dma_base); + ppci->table_group->tce32_size = 1 << be32_to_cpu(prop.window_shift); + + if (!iommu_init_table(tbl, ppci->phb->node, 0, 0)) + panic("Failed to initialize iommu table"); + iommu_register_group(ppci->table_group, pci_domain_nr(bus), 0); pr_debug(" created table: %p\n", ppci->table_group); @@ -968,6 +1004,12 @@ static void find_existing_ddw_windows_named(const char *name) continue; } + /* If at the time of system initialization, there are DDWs in OF, + * it means this is during kexec. DDW could be direct or dynamic. + * We will just mark DDWs as "dynamic" since this is kdump path, + * no need to worry about perforance. ddw_list_new_entry() will + * set window->direct = false. + */ window = ddw_list_new_entry(pdn, dma64); if (!window) { of_node_put(pdn); @@ -1524,8 +1566,8 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) { struct device_node *pdn, *dn; struct iommu_table *tbl; - const __be32 *dma_window = NULL; struct pci_dn *pci; + struct dynamic_dma_window_prop prop; pr_debug("pci_dma_dev_setup_pSeriesLP: %s\n", pci_name(dev)); @@ -1538,7 +1580,7 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) dn = pci_device_to_OF_node(dev); pr_debug(" node is %pOF\n", dn); - pdn = pci_dma_find(dn, &dma_window); + pdn = pci_dma_find(dn, &prop); if (!pdn || !PCI_DN(pdn)) { printk(KERN_WARNING "pci_dma_dev_setup_pSeriesLP: " "no DMA window found for pci dev=%s dn=%pOF\n", @@ -1551,8 +1593,20 @@ static void pci_dma_dev_setup_pSeriesLP(struct pci_dev *dev) if (!pci->table_group) { pci->table_group = iommu_pseries_alloc_group(pci->phb->node); tbl = pci->table_group->tables[0]; - iommu_table_setparms_lpar(pci->phb, pdn, tbl, - pci->table_group, dma_window); + + iommu_table_setparms_common(tbl, pci->phb->bus->number, + be32_to_cpu(prop.liobn), + be64_to_cpu(prop.dma_base), + 1ULL << be32_to_cpu(prop.window_shift), + be32_to_cpu(prop.tce_shift), NULL, + &iommu_table_lpar_multi_ops); + + /* Only for normal boot with default window. Doesn't matter even + * if we set these with DDW which is 64bit during kdump, since + * these will not be used during kdump. + */ + pci->table_group->tce32_start = be64_to_cpu(prop.dma_base); + pci->table_group->tce32_size = 1 << be32_to_cpu(prop.window_shift); iommu_init_table(tbl, pci->phb->node, 0, 0); iommu_register_group(pci->table_group, diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c index 4561667832ed..4e9916bb03d7 100644 --- a/arch/powerpc/platforms/pseries/lpar.c +++ b/arch/powerpc/platforms/pseries/lpar.c @@ -662,8 +662,12 @@ u64 pseries_paravirt_steal_clock(int cpu) { struct lppaca *lppaca = &lppaca_of(cpu); - return be64_to_cpu(READ_ONCE(lppaca->enqueue_dispatch_tb)) + - be64_to_cpu(READ_ONCE(lppaca->ready_enqueue_tb)); + /* + * VPA steal time counters are reported at TB frequency. Hence do a + * conversion to ns before returning + */ + return tb_to_ns(be64_to_cpu(READ_ONCE(lppaca->enqueue_dispatch_tb)) + + be64_to_cpu(READ_ONCE(lppaca->ready_enqueue_tb))); } #endif diff --git a/arch/powerpc/platforms/pseries/papr-sysparm.c b/arch/powerpc/platforms/pseries/papr-sysparm.c index fedc61599e6c..7063ce8884e4 100644 --- a/arch/powerpc/platforms/pseries/papr-sysparm.c +++ b/arch/powerpc/platforms/pseries/papr-sysparm.c @@ -2,14 +2,20 @@ #define pr_fmt(fmt) "papr-sysparm: " fmt +#include <linux/anon_inodes.h> #include <linux/bug.h> +#include <linux/file.h> +#include <linux/fs.h> #include <linux/init.h> #include <linux/kernel.h> +#include <linux/miscdevice.h> #include <linux/printk.h> #include <linux/slab.h> -#include <asm/rtas.h> +#include <linux/uaccess.h> +#include <asm/machdep.h> #include <asm/papr-sysparm.h> #include <asm/rtas-work-area.h> +#include <asm/rtas.h> struct papr_sysparm_buf *papr_sysparm_buf_alloc(void) { @@ -23,6 +29,46 @@ void papr_sysparm_buf_free(struct papr_sysparm_buf *buf) kfree(buf); } +static size_t papr_sysparm_buf_get_length(const struct papr_sysparm_buf *buf) +{ + return be16_to_cpu(buf->len); +} + +static void papr_sysparm_buf_set_length(struct papr_sysparm_buf *buf, size_t length) +{ + WARN_ONCE(length > sizeof(buf->val), + "bogus length %zu, clamping to safe value", length); + length = min(sizeof(buf->val), length); + buf->len = cpu_to_be16(length); +} + +/* + * For use on buffers returned from ibm,get-system-parameter before + * returning them to callers. Ensures the encoded length of valid data + * cannot overrun buf->val[]. + */ +static void papr_sysparm_buf_clamp_length(struct papr_sysparm_buf *buf) +{ + papr_sysparm_buf_set_length(buf, papr_sysparm_buf_get_length(buf)); +} + +/* + * Perform some basic diligence on the system parameter buffer before + * submitting it to RTAS. + */ +static bool papr_sysparm_buf_can_submit(const struct papr_sysparm_buf *buf) +{ + /* + * Firmware ought to reject buffer lengths that exceed the + * maximum specified in PAPR, but there's no reason for the + * kernel to allow them either. + */ + if (papr_sysparm_buf_get_length(buf) > sizeof(buf->val)) + return false; + + return true; +} + /** * papr_sysparm_get() - Retrieve the value of a PAPR system parameter. * @param: PAPR system parameter token as described in @@ -47,7 +93,6 @@ void papr_sysparm_buf_free(struct papr_sysparm_buf *buf) * * Return: 0 on success, -errno otherwise. @buf is unmodified on error. */ - int papr_sysparm_get(papr_sysparm_t param, struct papr_sysparm_buf *buf) { const s32 token = rtas_function_token(RTAS_FN_IBM_GET_SYSTEM_PARAMETER); @@ -63,6 +108,9 @@ int papr_sysparm_get(papr_sysparm_t param, struct papr_sysparm_buf *buf) if (token == RTAS_UNKNOWN_SERVICE) return -ENOENT; + if (!papr_sysparm_buf_can_submit(buf)) + return -EINVAL; + work_area = rtas_work_area_alloc(sizeof(*buf)); memcpy(rtas_work_area_raw_buf(work_area), buf, sizeof(*buf)); @@ -77,6 +125,7 @@ int papr_sysparm_get(papr_sysparm_t param, struct papr_sysparm_buf *buf) case 0: ret = 0; memcpy(buf, rtas_work_area_raw_buf(work_area), sizeof(*buf)); + papr_sysparm_buf_clamp_length(buf); break; case -3: /* parameter not implemented */ ret = -EOPNOTSUPP; @@ -115,6 +164,9 @@ int papr_sysparm_set(papr_sysparm_t param, const struct papr_sysparm_buf *buf) if (token == RTAS_UNKNOWN_SERVICE) return -ENOENT; + if (!papr_sysparm_buf_can_submit(buf)) + return -EINVAL; + work_area = rtas_work_area_alloc(sizeof(*buf)); memcpy(rtas_work_area_raw_buf(work_area), buf, sizeof(*buf)); @@ -149,3 +201,152 @@ int papr_sysparm_set(papr_sysparm_t param, const struct papr_sysparm_buf *buf) return ret; } + +static struct papr_sysparm_buf * +papr_sysparm_buf_from_user(const struct papr_sysparm_io_block __user *user_iob) +{ + struct papr_sysparm_buf *kern_spbuf; + long err; + u16 len; + + /* + * The length of valid data that userspace claims to be in + * user_iob->data[]. + */ + if (get_user(len, &user_iob->length)) + return ERR_PTR(-EFAULT); + + static_assert(sizeof(user_iob->data) >= PAPR_SYSPARM_MAX_INPUT); + static_assert(sizeof(kern_spbuf->val) >= PAPR_SYSPARM_MAX_INPUT); + + if (len > PAPR_SYSPARM_MAX_INPUT) + return ERR_PTR(-EINVAL); + + kern_spbuf = papr_sysparm_buf_alloc(); + if (!kern_spbuf) + return ERR_PTR(-ENOMEM); + + papr_sysparm_buf_set_length(kern_spbuf, len); + + if (len > 0 && copy_from_user(kern_spbuf->val, user_iob->data, len)) { + err = -EFAULT; + goto free_sysparm_buf; + } + + return kern_spbuf; + +free_sysparm_buf: + papr_sysparm_buf_free(kern_spbuf); + return ERR_PTR(err); +} + +static int papr_sysparm_buf_to_user(const struct papr_sysparm_buf *kern_spbuf, + struct papr_sysparm_io_block __user *user_iob) +{ + u16 len_out = papr_sysparm_buf_get_length(kern_spbuf); + + if (put_user(len_out, &user_iob->length)) + return -EFAULT; + + static_assert(sizeof(user_iob->data) >= PAPR_SYSPARM_MAX_OUTPUT); + static_assert(sizeof(kern_spbuf->val) >= PAPR_SYSPARM_MAX_OUTPUT); + + if (copy_to_user(user_iob->data, kern_spbuf->val, PAPR_SYSPARM_MAX_OUTPUT)) + return -EFAULT; + + return 0; +} + +static long papr_sysparm_ioctl_get(struct papr_sysparm_io_block __user *user_iob) +{ + struct papr_sysparm_buf *kern_spbuf; + papr_sysparm_t param; + long ret; + + if (get_user(param.token, &user_iob->parameter)) + return -EFAULT; + + kern_spbuf = papr_sysparm_buf_from_user(user_iob); + if (IS_ERR(kern_spbuf)) + return PTR_ERR(kern_spbuf); + + ret = papr_sysparm_get(param, kern_spbuf); + if (ret) + goto free_sysparm_buf; + + ret = papr_sysparm_buf_to_user(kern_spbuf, user_iob); + if (ret) + goto free_sysparm_buf; + + ret = 0; + +free_sysparm_buf: + papr_sysparm_buf_free(kern_spbuf); + return ret; +} + + +static long papr_sysparm_ioctl_set(struct papr_sysparm_io_block __user *user_iob) +{ + struct papr_sysparm_buf *kern_spbuf; + papr_sysparm_t param; + long ret; + + if (get_user(param.token, &user_iob->parameter)) + return -EFAULT; + + kern_spbuf = papr_sysparm_buf_from_user(user_iob); + if (IS_ERR(kern_spbuf)) + return PTR_ERR(kern_spbuf); + + ret = papr_sysparm_set(param, kern_spbuf); + if (ret) + goto free_sysparm_buf; + + ret = 0; + +free_sysparm_buf: + papr_sysparm_buf_free(kern_spbuf); + return ret; +} + +static long papr_sysparm_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) +{ + void __user *argp = (__force void __user *)arg; + long ret; + + switch (ioctl) { + case PAPR_SYSPARM_IOC_GET: + ret = papr_sysparm_ioctl_get(argp); + break; + case PAPR_SYSPARM_IOC_SET: + if (filp->f_mode & FMODE_WRITE) + ret = papr_sysparm_ioctl_set(argp); + else + ret = -EBADF; + break; + default: + ret = -ENOIOCTLCMD; + break; + } + return ret; +} + +static const struct file_operations papr_sysparm_ops = { + .unlocked_ioctl = papr_sysparm_ioctl, +}; + +static struct miscdevice papr_sysparm_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "papr-sysparm", + .fops = &papr_sysparm_ops, +}; + +static __init int papr_sysparm_init(void) +{ + if (!rtas_function_implemented(RTAS_FN_IBM_GET_SYSTEM_PARAMETER)) + return -ENODEV; + + return misc_register(&papr_sysparm_dev); +} +machine_device_initcall(pseries, papr_sysparm_init); diff --git a/arch/powerpc/platforms/pseries/papr-vpd.c b/arch/powerpc/platforms/pseries/papr-vpd.c new file mode 100644 index 000000000000..c29e85db5f35 --- /dev/null +++ b/arch/powerpc/platforms/pseries/papr-vpd.c @@ -0,0 +1,541 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#define pr_fmt(fmt) "papr-vpd: " fmt + +#include <linux/anon_inodes.h> +#include <linux/build_bug.h> +#include <linux/file.h> +#include <linux/fs.h> +#include <linux/init.h> +#include <linux/lockdep.h> +#include <linux/kernel.h> +#include <linux/miscdevice.h> +#include <linux/signal.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/string_helpers.h> +#include <linux/uaccess.h> +#include <asm/machdep.h> +#include <asm/papr-vpd.h> +#include <asm/rtas-work-area.h> +#include <asm/rtas.h> +#include <uapi/asm/papr-vpd.h> + +/* + * Function-specific return values for ibm,get-vpd, derived from PAPR+ + * v2.13 7.3.20 "ibm,get-vpd RTAS Call". + */ +#define RTAS_IBM_GET_VPD_COMPLETE 0 /* All VPD has been retrieved. */ +#define RTAS_IBM_GET_VPD_MORE_DATA 1 /* More VPD is available. */ +#define RTAS_IBM_GET_VPD_START_OVER -4 /* VPD changed, restart call sequence. */ + +/** + * struct rtas_ibm_get_vpd_params - Parameters (in and out) for ibm,get-vpd. + * @loc_code: In: Caller-provided location code buffer. Must be RTAS-addressable. + * @work_area: In: Caller-provided work area buffer for results. + * @sequence: In: Sequence number. Out: Next sequence number. + * @written: Out: Bytes written by ibm,get-vpd to @work_area. + * @status: Out: RTAS call status. + */ +struct rtas_ibm_get_vpd_params { + const struct papr_location_code *loc_code; + struct rtas_work_area *work_area; + u32 sequence; + u32 written; + s32 status; +}; + +/** + * rtas_ibm_get_vpd() - Call ibm,get-vpd to fill a work area buffer. + * @params: See &struct rtas_ibm_get_vpd_params. + * + * Calls ibm,get-vpd until it errors or successfully deposits data + * into the supplied work area. Handles RTAS retry statuses. Maps RTAS + * error statuses to reasonable errno values. + * + * The caller is expected to invoke rtas_ibm_get_vpd() multiple times + * to retrieve all the VPD for the provided location code. Only one + * sequence should be in progress at any time; starting a new sequence + * will disrupt any sequence already in progress. Serialization of VPD + * retrieval sequences is the responsibility of the caller. + * + * The caller should inspect @params.status to determine whether more + * calls are needed to complete the sequence. + * + * Context: May sleep. + * Return: -ve on error, 0 otherwise. + */ +static int rtas_ibm_get_vpd(struct rtas_ibm_get_vpd_params *params) +{ + const struct papr_location_code *loc_code = params->loc_code; + struct rtas_work_area *work_area = params->work_area; + u32 rets[2]; + s32 fwrc; + int ret; + + lockdep_assert_held(&rtas_ibm_get_vpd_lock); + + do { + fwrc = rtas_call(rtas_function_token(RTAS_FN_IBM_GET_VPD), 4, 3, + rets, + __pa(loc_code), + rtas_work_area_phys(work_area), + rtas_work_area_size(work_area), + params->sequence); + } while (rtas_busy_delay(fwrc)); + + switch (fwrc) { + case RTAS_HARDWARE_ERROR: + ret = -EIO; + break; + case RTAS_INVALID_PARAMETER: + ret = -EINVAL; + break; + case RTAS_IBM_GET_VPD_START_OVER: + ret = -EAGAIN; + break; + case RTAS_IBM_GET_VPD_MORE_DATA: + params->sequence = rets[0]; + fallthrough; + case RTAS_IBM_GET_VPD_COMPLETE: + params->written = rets[1]; + /* + * Kernel or firmware bug, do not continue. + */ + if (WARN(params->written > rtas_work_area_size(work_area), + "possible write beyond end of work area")) + ret = -EFAULT; + else + ret = 0; + break; + default: + ret = -EIO; + pr_err_ratelimited("unexpected ibm,get-vpd status %d\n", fwrc); + break; + } + + params->status = fwrc; + return ret; +} + +/* + * Internal VPD "blob" APIs for accumulating ibm,get-vpd results into + * an immutable buffer to be attached to a file descriptor. + */ +struct vpd_blob { + const char *data; + size_t len; +}; + +static bool vpd_blob_has_data(const struct vpd_blob *blob) +{ + return blob->data && blob->len; +} + +static void vpd_blob_free(const struct vpd_blob *blob) +{ + if (blob) { + kvfree(blob->data); + kfree(blob); + } +} + +/** + * vpd_blob_extend() - Append data to a &struct vpd_blob. + * @blob: The blob to extend. + * @data: The new data to append to @blob. + * @len: The length of @data. + * + * Context: May sleep. + * Return: -ENOMEM on allocation failure, 0 otherwise. + */ +static int vpd_blob_extend(struct vpd_blob *blob, const char *data, size_t len) +{ + const size_t new_len = blob->len + len; + const size_t old_len = blob->len; + const char *old_ptr = blob->data; + char *new_ptr; + + new_ptr = old_ptr ? + kvrealloc(old_ptr, old_len, new_len, GFP_KERNEL_ACCOUNT) : + kvmalloc(len, GFP_KERNEL_ACCOUNT); + + if (!new_ptr) + return -ENOMEM; + + memcpy(&new_ptr[old_len], data, len); + blob->data = new_ptr; + blob->len = new_len; + return 0; +} + +/** + * vpd_blob_generate() - Construct a new &struct vpd_blob. + * @generator: Function that supplies the blob data. + * @arg: Context pointer supplied by caller, passed to @generator. + * + * The @generator callback is invoked until it returns NULL. @arg is + * passed to @generator in its first argument on each call. When + * @generator returns data, it should store the data length in its + * second argument. + * + * Context: May sleep. + * Return: A completely populated &struct vpd_blob, or NULL on error. + */ +static const struct vpd_blob * +vpd_blob_generate(const char * (*generator)(void *, size_t *), void *arg) +{ + struct vpd_blob *blob; + const char *buf; + size_t len; + int err = 0; + + blob = kzalloc(sizeof(*blob), GFP_KERNEL_ACCOUNT); + if (!blob) + return NULL; + + while (err == 0 && (buf = generator(arg, &len))) + err = vpd_blob_extend(blob, buf, len); + + if (err != 0 || !vpd_blob_has_data(blob)) + goto free_blob; + + return blob; +free_blob: + vpd_blob_free(blob); + return NULL; +} + +/* + * Internal VPD sequence APIs. A VPD sequence is a series of calls to + * ibm,get-vpd for a given location code. The sequence ends when an + * error is encountered or all VPD for the location code has been + * returned. + */ + +/** + * struct vpd_sequence - State for managing a VPD sequence. + * @error: Shall be zero as long as the sequence has not encountered an error, + * -ve errno otherwise. Use vpd_sequence_set_err() to update this. + * @params: Parameter block to pass to rtas_ibm_get_vpd(). + */ +struct vpd_sequence { + int error; + struct rtas_ibm_get_vpd_params params; +}; + +/** + * vpd_sequence_begin() - Begin a VPD retrieval sequence. + * @seq: Uninitialized sequence state. + * @loc_code: Location code that defines the scope of the VPD to return. + * + * Initializes @seq with the resources necessary to carry out a VPD + * sequence. Callers must pass @seq to vpd_sequence_end() regardless + * of whether the sequence succeeds. + * + * Context: May sleep. + */ +static void vpd_sequence_begin(struct vpd_sequence *seq, + const struct papr_location_code *loc_code) +{ + /* + * Use a static data structure for the location code passed to + * RTAS to ensure it's in the RMA and avoid a separate work + * area allocation. Guarded by the function lock. + */ + static struct papr_location_code static_loc_code; + + /* + * We could allocate the work area before acquiring the + * function lock, but that would allow concurrent requests to + * exhaust the limited work area pool for no benefit. So + * allocate the work area under the lock. + */ + mutex_lock(&rtas_ibm_get_vpd_lock); + static_loc_code = *loc_code; + *seq = (struct vpd_sequence) { + .params = { + .work_area = rtas_work_area_alloc(SZ_4K), + .loc_code = &static_loc_code, + .sequence = 1, + }, + }; +} + +/** + * vpd_sequence_end() - Finalize a VPD retrieval sequence. + * @seq: Sequence state. + * + * Releases resources obtained by vpd_sequence_begin(). + */ +static void vpd_sequence_end(struct vpd_sequence *seq) +{ + rtas_work_area_free(seq->params.work_area); + mutex_unlock(&rtas_ibm_get_vpd_lock); +} + +/** + * vpd_sequence_should_stop() - Determine whether a VPD retrieval sequence + * should continue. + * @seq: VPD sequence state. + * + * Examines the sequence error state and outputs of the last call to + * ibm,get-vpd to determine whether the sequence in progress should + * continue or stop. + * + * Return: True if the sequence has encountered an error or if all VPD for + * this sequence has been retrieved. False otherwise. + */ +static bool vpd_sequence_should_stop(const struct vpd_sequence *seq) +{ + bool done; + + if (seq->error) + return true; + + switch (seq->params.status) { + case 0: + if (seq->params.written == 0) + done = false; /* Initial state. */ + else + done = true; /* All data consumed. */ + break; + case 1: + done = false; /* More data available. */ + break; + default: + done = true; /* Error encountered. */ + break; + } + + return done; +} + +static int vpd_sequence_set_err(struct vpd_sequence *seq, int err) +{ + /* Preserve the first error recorded. */ + if (seq->error == 0) + seq->error = err; + + return seq->error; +} + +/* + * Generator function to be passed to vpd_blob_generate(). + */ +static const char *vpd_sequence_fill_work_area(void *arg, size_t *len) +{ + struct vpd_sequence *seq = arg; + struct rtas_ibm_get_vpd_params *p = &seq->params; + + if (vpd_sequence_should_stop(seq)) + return NULL; + if (vpd_sequence_set_err(seq, rtas_ibm_get_vpd(p))) + return NULL; + *len = p->written; + return rtas_work_area_raw_buf(p->work_area); +} + +/* + * Higher-level VPD retrieval code below. These functions use the + * vpd_blob_* and vpd_sequence_* APIs defined above to create fd-based + * VPD handles for consumption by user space. + */ + +/** + * papr_vpd_run_sequence() - Run a single VPD retrieval sequence. + * @loc_code: Location code that defines the scope of VPD to return. + * + * Context: May sleep. Holds a mutex and an RTAS work area for its + * duration. Typically performs multiple sleepable slab + * allocations. + * + * Return: A populated &struct vpd_blob on success. Encoded error + * pointer otherwise. + */ +static const struct vpd_blob *papr_vpd_run_sequence(const struct papr_location_code *loc_code) +{ + const struct vpd_blob *blob; + struct vpd_sequence seq; + + vpd_sequence_begin(&seq, loc_code); + blob = vpd_blob_generate(vpd_sequence_fill_work_area, &seq); + if (!blob) + vpd_sequence_set_err(&seq, -ENOMEM); + vpd_sequence_end(&seq); + + if (seq.error) { + vpd_blob_free(blob); + return ERR_PTR(seq.error); + } + + return blob; +} + +/** + * papr_vpd_retrieve() - Return the VPD for a location code. + * @loc_code: Location code that defines the scope of VPD to return. + * + * Run VPD sequences against @loc_code until a blob is successfully + * instantiated, or a hard error is encountered, or a fatal signal is + * pending. + * + * Context: May sleep. + * Return: A fully populated VPD blob when successful. Encoded error + * pointer otherwise. + */ +static const struct vpd_blob *papr_vpd_retrieve(const struct papr_location_code *loc_code) +{ + const struct vpd_blob *blob; + + /* + * EAGAIN means the sequence errored with a -4 (VPD changed) + * status from ibm,get-vpd, and we should attempt a new + * sequence. PAPR+ v2.13 R1–7.3.20–5 indicates that this + * should be a transient condition, not something that happens + * continuously. But we'll stop trying on a fatal signal. + */ + do { + blob = papr_vpd_run_sequence(loc_code); + if (!IS_ERR(blob)) /* Success. */ + break; + if (PTR_ERR(blob) != -EAGAIN) /* Hard error. */ + break; + pr_info_ratelimited("VPD changed during retrieval, retrying\n"); + cond_resched(); + } while (!fatal_signal_pending(current)); + + return blob; +} + +static ssize_t papr_vpd_handle_read(struct file *file, char __user *buf, size_t size, loff_t *off) +{ + const struct vpd_blob *blob = file->private_data; + + /* bug: we should not instantiate a handle without any data attached. */ + if (!vpd_blob_has_data(blob)) { + pr_err_once("handle without data\n"); + return -EIO; + } + + return simple_read_from_buffer(buf, size, off, blob->data, blob->len); +} + +static int papr_vpd_handle_release(struct inode *inode, struct file *file) +{ + const struct vpd_blob *blob = file->private_data; + + vpd_blob_free(blob); + + return 0; +} + +static loff_t papr_vpd_handle_seek(struct file *file, loff_t off, int whence) +{ + const struct vpd_blob *blob = file->private_data; + + return fixed_size_llseek(file, off, whence, blob->len); +} + + +static const struct file_operations papr_vpd_handle_ops = { + .read = papr_vpd_handle_read, + .llseek = papr_vpd_handle_seek, + .release = papr_vpd_handle_release, +}; + +/** + * papr_vpd_create_handle() - Create a fd-based handle for reading VPD. + * @ulc: Location code in user memory; defines the scope of the VPD to + * retrieve. + * + * Handler for PAPR_VPD_IOC_CREATE_HANDLE ioctl command. Validates + * @ulc and instantiates an immutable VPD "blob" for it. The blob is + * attached to a file descriptor for reading by user space. The memory + * backing the blob is freed when the file is released. + * + * The entire requested VPD is retrieved by this call and all + * necessary RTAS interactions are performed before returning the fd + * to user space. This keeps the read handler simple and ensures that + * the kernel can prevent interleaving of ibm,get-vpd call sequences. + * + * Return: The installed fd number if successful, -ve errno otherwise. + */ +static long papr_vpd_create_handle(struct papr_location_code __user *ulc) +{ + struct papr_location_code klc; + const struct vpd_blob *blob; + struct file *file; + long err; + int fd; + + if (copy_from_user(&klc, ulc, sizeof(klc))) + return -EFAULT; + + if (!string_is_terminated(klc.str, ARRAY_SIZE(klc.str))) + return -EINVAL; + + blob = papr_vpd_retrieve(&klc); + if (IS_ERR(blob)) + return PTR_ERR(blob); + + fd = get_unused_fd_flags(O_RDONLY | O_CLOEXEC); + if (fd < 0) { + err = fd; + goto free_blob; + } + + file = anon_inode_getfile("[papr-vpd]", &papr_vpd_handle_ops, + (void *)blob, O_RDONLY); + if (IS_ERR(file)) { + err = PTR_ERR(file); + goto put_fd; + } + + file->f_mode |= FMODE_LSEEK | FMODE_PREAD; + fd_install(fd, file); + return fd; +put_fd: + put_unused_fd(fd); +free_blob: + vpd_blob_free(blob); + return err; +} + +/* + * Top-level ioctl handler for /dev/papr-vpd. + */ +static long papr_vpd_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) +{ + void __user *argp = (__force void __user *)arg; + long ret; + + switch (ioctl) { + case PAPR_VPD_IOC_CREATE_HANDLE: + ret = papr_vpd_create_handle(argp); + break; + default: + ret = -ENOIOCTLCMD; + break; + } + return ret; +} + +static const struct file_operations papr_vpd_ops = { + .unlocked_ioctl = papr_vpd_dev_ioctl, +}; + +static struct miscdevice papr_vpd_dev = { + .minor = MISC_DYNAMIC_MINOR, + .name = "papr-vpd", + .fops = &papr_vpd_ops, +}; + +static __init int papr_vpd_init(void) +{ + if (!rtas_function_implemented(RTAS_FN_IBM_GET_VPD)) + return -ENODEV; + + return misc_register(&papr_vpd_dev); +} +machine_device_initcall(pseries, papr_vpd_init); diff --git a/arch/powerpc/platforms/pseries/pci_dlpar.c b/arch/powerpc/platforms/pseries/pci_dlpar.c index 4ba824568119..4448386268d9 100644 --- a/arch/powerpc/platforms/pseries/pci_dlpar.c +++ b/arch/powerpc/platforms/pseries/pci_dlpar.c @@ -35,6 +35,8 @@ struct pci_controller *init_phb_dynamic(struct device_node *dn) pseries_msi_allocate_domains(phb); + ppc_iommu_register_device(phb); + /* Create EEH devices for the PHB */ eeh_phb_pe_create(phb); @@ -76,6 +78,8 @@ int remove_phb_dynamic(struct pci_controller *phb) } } + ppc_iommu_unregister_device(phb); + pseries_msi_free_domains(phb); /* Keep a reference so phb isn't freed yet */ diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h index 8376f03f932a..bba4ad192b0f 100644 --- a/arch/powerpc/platforms/pseries/pseries.h +++ b/arch/powerpc/platforms/pseries/pseries.h @@ -55,6 +55,7 @@ extern int dlpar_detach_node(struct device_node *); extern int dlpar_acquire_drc(u32 drc_index); extern int dlpar_release_drc(u32 drc_index); extern int dlpar_unisolate_drc(u32 drc_index); +extern void post_mobility_fixup(void); void queue_hotplug_event(struct pseries_hp_errorlog *hp_errlog); int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_errlog); diff --git a/arch/powerpc/platforms/pseries/suspend.c b/arch/powerpc/platforms/pseries/suspend.c index 5c43435472cc..382003dfdb9a 100644 --- a/arch/powerpc/platforms/pseries/suspend.c +++ b/arch/powerpc/platforms/pseries/suspend.c @@ -13,6 +13,7 @@ #include <asm/mmu.h> #include <asm/rtas.h> #include <asm/topology.h> +#include "pseries.h" static struct device suspend_dev; |