Merge tag 'powerpc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "This was delayed a day or two by some build-breakage on old toolchains
  which we've now fixed.

  There's two PCI commits both acked by Bjorn.

  There's one commit to mm/hugepage.c which is (co)authored by Kirill.

  Highlights:
   - Restructure Linux PTE on Book3S/64 to Radix format from Paul
     Mackerras
   - Book3s 64 MMU cleanup in preparation for Radix MMU from Aneesh
     Kumar K.V
   - Add POWER9 cputable entry from Michael Neuling
   - FPU/Altivec/VSX save/restore optimisations from Cyril Bur
   - Add support for new ftrace ABI on ppc64le from Torsten Duwe

  Various cleanups & minor fixes from:
   - Adam Buchbinder, Andrew Donnellan, Balbir Singh, Christophe Leroy,
     Cyril Bur, Luis Henriques, Madhavan Srinivasan, Pan Xinhui, Russell
     Currey, Sukadev Bhattiprolu, Suraj Jitindar Singh.

  General:
   - atomics: Allow architectures to define their own __atomic_op_*
     helpers from Boqun Feng
   - Implement atomic{, 64}_*_return_* variants and acquire/release/
     relaxed variants for (cmp)xchg from Boqun Feng
   - Add powernv_defconfig from Jeremy Kerr
   - Fix BUG_ON() reporting in real mode from Balbir Singh
   - Add xmon command to dump OPAL msglog from Andrew Donnellan
   - Add xmon command to dump process/task similar to ps(1) from Douglas
     Miller
   - Clean up memory hotplug failure paths from David Gibson

  pci/eeh:
   - Redesign SR-IOV on PowerNV to give absolute isolation between VFs
     from Wei Yang.
   - EEH Support for SRIOV VFs from Wei Yang and Gavin Shan.
   - PCI/IOV: Rename and export virtfn_{add, remove} from Wei Yang
   - PCI: Add pcibios_bus_add_device() weak function from Wei Yang
   - MAINTAINERS: Update EEH details and maintainership from Russell
     Currey

  cxl:
   - Support added to the CXL driver for running on both bare-metal and
     hypervisor systems, from Christophe Lombard and Frederic Barrat.
   - Ignore probes for virtual afu pci devices from Vaibhav Jain

  perf:
   - Export Power8 generic and cache events to sysfs from Sukadev
     Bhattiprolu
   - hv-24x7: Fix usage with chip events, display change in counter
     values, display domain indices in sysfs, eliminate domain suffix in
     event names, from Sukadev Bhattiprolu

  Freescale:
   - Updates from Scott: "Highlights include 8xx optimizations, 32-bit
     checksum optimizations, 86xx consolidation, e5500/e6500 cpu
     hotplug, more fman and other dt bits, and minor fixes/cleanup"

* tag 'powerpc-4.6-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (179 commits)
  powerpc: Fix unrecoverable SLB miss during restore_math()
  powerpc/8xx: Fix do_mtspr_cpu6() build on older compilers
  powerpc/rcpm: Fix build break when SMP=n
  powerpc/book3e-64: Use hardcoded mttmr opcode
  powerpc/fsl/dts: Add "jedec,spi-nor" flash compatible
  powerpc/T104xRDB: add tdm riser card node to device tree
  powerpc32: PAGE_EXEC required for inittext
  powerpc/mpc85xx: Add pcsphy nodes to FManV3 device tree
  powerpc/mpc85xx: Add MDIO bus muxing support to the board device tree(s)
  powerpc/86xx: Introduce and use common dtsi
  powerpc/86xx: Update device tree
  powerpc/86xx: Move dts files to fsl directory
  powerpc/86xx: Switch to kconfig fragments approach
  powerpc/86xx: Update defconfigs
  powerpc/86xx: Consolidate common platform code
  powerpc32: Remove one insn in mulhdu
  powerpc32: small optimisation in flush_icache_range()
  powerpc: Simplify test in __dma_sync()
  powerpc32: move xxxxx_dcache_range() functions inline
  powerpc32: Remove clear_pages() and define clear_page() inline
  ...

1 files changed, 114 insertions, 8 deletions

diff --git a/drivers/misc/cxl/main.c b/drivers/misc/cxl/main.c
index 9fde75ed4fac..ae68c3201156 100644
--- a/drivers/misc/cxl/main.c
+++ b/drivers/misc/cxl/main.c
@@ -32,6 +32,29 @@ uint cxl_verbose;
 module_param_named(verbose, cxl_verbose, uint, 0600);
 MODULE_PARM_DESC(verbose, "Enable verbose dmesg output");
 
+const struct cxl_backend_ops *cxl_ops;
+
+int cxl_afu_slbia(struct cxl_afu *afu)
+{
+	unsigned long timeout = jiffies + (HZ * CXL_TIMEOUT);
+
+	pr_devel("cxl_afu_slbia issuing SLBIA command\n");
+	cxl_p2n_write(afu, CXL_SLBIA_An, CXL_TLB_SLB_IQ_ALL);
+	while (cxl_p2n_read(afu, CXL_SLBIA_An) & CXL_TLB_SLB_P) {
+		if (time_after_eq(jiffies, timeout)) {
+			dev_warn(&afu->dev, "WARNING: CXL AFU SLBIA timed out!\n");
+			return -EBUSY;
+		}
+		/* If the adapter has gone down, we can assume that we
+		 * will PERST it and that will invalidate everything.
+		 */
+		if (!cxl_ops->link_ok(afu->adapter, afu))
+			return -EIO;
+		cpu_relax();
+	}
+	return 0;
+}
+
 static inline void _cxl_slbia(struct cxl_context *ctx, struct mm_struct *mm)
 {
 	struct task_struct *task;
@@ -139,6 +162,32 @@ int cxl_alloc_sst(struct cxl_context *ctx)
 	return 0;
 }
 
+/* print buffer content as integers when debugging */
+void cxl_dump_debug_buffer(void *buf, size_t buf_len)
+{
+#ifdef DEBUG
+	int i, *ptr;
+
+	/*
+	 * We want to regroup up to 4 integers per line, which means they
+	 * need to be in the same pr_devel() statement
+	 */
+	ptr = (int *) buf;
+	for (i = 0; i * 4 < buf_len; i += 4) {
+		if ((i + 3) * 4 < buf_len)
+			pr_devel("%.8x %.8x %.8x %.8x\n", ptr[i], ptr[i + 1],
+				ptr[i + 2], ptr[i + 3]);
+		else if ((i + 2) * 4 < buf_len)
+			pr_devel("%.8x %.8x %.8x\n", ptr[i], ptr[i + 1],
+				ptr[i + 2]);
+		else if ((i + 1) * 4 < buf_len)
+			pr_devel("%.8x %.8x\n", ptr[i], ptr[i + 1]);
+		else
+			pr_devel("%.8x\n", ptr[i]);
+	}
+#endif /* DEBUG */
+}
+
 /* Find a CXL adapter by it's number and increase it's refcount */
 struct cxl *get_cxl_adapter(int num)
 {
@@ -152,7 +201,7 @@ struct cxl *get_cxl_adapter(int num)
 	return adapter;
 }
 
-int cxl_alloc_adapter_nr(struct cxl *adapter)
+static int cxl_alloc_adapter_nr(struct cxl *adapter)
 {
 	int i;
 
@@ -174,13 +223,58 @@ void cxl_remove_adapter_nr(struct cxl *adapter)
 	idr_remove(&cxl_adapter_idr, adapter->adapter_num);
 }
 
+struct cxl *cxl_alloc_adapter(void)
+{
+	struct cxl *adapter;
+
+	if (!(adapter = kzalloc(sizeof(struct cxl), GFP_KERNEL)))
+		return NULL;
+
+	spin_lock_init(&adapter->afu_list_lock);
+
+	if (cxl_alloc_adapter_nr(adapter))
+		goto err1;
+
+	if (dev_set_name(&adapter->dev, "card%i", adapter->adapter_num))
+		goto err2;
+
+	return adapter;
+
+err2:
+	cxl_remove_adapter_nr(adapter);
+err1:
+	kfree(adapter);
+	return NULL;
+}
+
+struct cxl_afu *cxl_alloc_afu(struct cxl *adapter, int slice)
+{
+	struct cxl_afu *afu;
+
+	if (!(afu = kzalloc(sizeof(struct cxl_afu), GFP_KERNEL)))
+		return NULL;
+
+	afu->adapter = adapter;
+	afu->dev.parent = &adapter->dev;
+	afu->dev.release = cxl_ops->release_afu;
+	afu->slice = slice;
+	idr_init(&afu->contexts_idr);
+	mutex_init(&afu->contexts_lock);
+	spin_lock_init(&afu->afu_cntl_lock);
+
+	afu->prefault_mode = CXL_PREFAULT_NONE;
+	afu->irqs_max = afu->adapter->user_irqs;
+
+	return afu;
+}
+
 int cxl_afu_select_best_mode(struct cxl_afu *afu)
 {
 	if (afu->modes_supported & CXL_MODE_DIRECTED)
-		return cxl_afu_activate_mode(afu, CXL_MODE_DIRECTED);
+		return cxl_ops->afu_activate_mode(afu, CXL_MODE_DIRECTED);
 
 	if (afu->modes_supported & CXL_MODE_DEDICATED)
-		return cxl_afu_activate_mode(afu, CXL_MODE_DEDICATED);
+		return cxl_ops->afu_activate_mode(afu, CXL_MODE_DEDICATED);
 
 	dev_warn(&afu->dev, "No supported programming modes available\n");
 	/* We don't fail this so the user can inspect sysfs */
@@ -191,9 +285,6 @@ static int __init init_cxl(void)
 {
 	int rc = 0;
 
-	if (!cpu_has_feature(CPU_FTR_HVMODE))
-		return -EPERM;
-
 	if ((rc = cxl_file_init()))
 		return rc;
 
@@ -202,7 +293,17 @@ static int __init init_cxl(void)
 	if ((rc = register_cxl_calls(&cxl_calls)))
 		goto err;
 
-	if ((rc = pci_register_driver(&cxl_pci_driver)))
+	if (cpu_has_feature(CPU_FTR_HVMODE)) {
+		cxl_ops = &cxl_native_ops;
+		rc = pci_register_driver(&cxl_pci_driver);
+	}
+#ifdef CONFIG_PPC_PSERIES
+	else {
+		cxl_ops = &cxl_guest_ops;
+		rc = platform_driver_register(&cxl_of_driver);
+	}
+#endif
+	if (rc)
 		goto err1;
 
 	return 0;
@@ -217,7 +318,12 @@ err:
 
 static void exit_cxl(void)
 {
-	pci_unregister_driver(&cxl_pci_driver);
+	if (cpu_has_feature(CPU_FTR_HVMODE))
+		pci_unregister_driver(&cxl_pci_driver);
+#ifdef CONFIG_PPC_PSERIES
+	else
+		platform_driver_unregister(&cxl_of_driver);
+#endif
 
 	cxl_debugfs_exit();
 	cxl_file_exit();