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-rw-r--r--arch/powerpc/platforms/powernv/Makefile2
-rw-r--r--arch/powerpc/platforms/powernv/opal-wrappers.S8
-rw-r--r--arch/powerpc/platforms/powernv/pci-ioda.c1341
-rw-r--r--arch/powerpc/platforms/powernv/pci-p5ioc2.c1
-rw-r--r--arch/powerpc/platforms/powernv/pci.c250
-rw-r--r--arch/powerpc/platforms/powernv/pci.h100
-rw-r--r--arch/powerpc/platforms/powernv/smp.c2
7 files changed, 1669 insertions, 35 deletions
diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile
index 31853008b418..bcc3cb48a44e 100644
--- a/arch/powerpc/platforms/powernv/Makefile
+++ b/arch/powerpc/platforms/powernv/Makefile
@@ -2,4 +2,4 @@ obj-y += setup.o opal-takeover.o opal-wrappers.o opal.o
obj-y += opal-rtc.o opal-nvram.o
obj-$(CONFIG_SMP) += smp.o
-obj-$(CONFIG_PCI) += pci.o pci-p5ioc2.o
+obj-$(CONFIG_PCI) += pci.o pci-p5ioc2.o pci-ioda.o
diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S
index 4a3f46d8533e..3bb07e5e43cd 100644
--- a/arch/powerpc/platforms/powernv/opal-wrappers.S
+++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
@@ -99,3 +99,11 @@ OPAL_CALL(opal_write_oppanel, OPAL_WRITE_OPPANEL);
OPAL_CALL(opal_pci_map_pe_dma_window, OPAL_PCI_MAP_PE_DMA_WINDOW);
OPAL_CALL(opal_pci_map_pe_dma_window_real, OPAL_PCI_MAP_PE_DMA_WINDOW_REAL);
OPAL_CALL(opal_pci_reset, OPAL_PCI_RESET);
+OPAL_CALL(opal_pci_get_hub_diag_data, OPAL_PCI_GET_HUB_DIAG_DATA);
+OPAL_CALL(opal_pci_get_phb_diag_data, OPAL_PCI_GET_PHB_DIAG_DATA);
+OPAL_CALL(opal_pci_fence_phb, OPAL_PCI_FENCE_PHB);
+OPAL_CALL(opal_pci_reinit, OPAL_PCI_REINIT);
+OPAL_CALL(opal_pci_mask_pe_error, OPAL_PCI_MASK_PE_ERROR);
+OPAL_CALL(opal_set_slot_led_status, OPAL_SET_SLOT_LED_STATUS);
+OPAL_CALL(opal_get_epow_status, OPAL_GET_EPOW_STATUS);
+OPAL_CALL(opal_set_system_attention_led, OPAL_SET_SYSTEM_ATTENTION_LED);
diff --git a/arch/powerpc/platforms/powernv/pci-ioda.c b/arch/powerpc/platforms/powernv/pci-ioda.c
new file mode 100644
index 000000000000..5e155dfc4320
--- /dev/null
+++ b/arch/powerpc/platforms/powernv/pci-ioda.c
@@ -0,0 +1,1341 @@
+/*
+ * Support PCI/PCIe on PowerNV platforms
+ *
+ * Copyright 2011 Benjamin Herrenschmidt, IBM Corp.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#undef DEBUG
+
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/delay.h>
+#include <linux/string.h>
+#include <linux/init.h>
+#include <linux/bootmem.h>
+#include <linux/irq.h>
+#include <linux/io.h>
+#include <linux/msi.h>
+
+#include <asm/sections.h>
+#include <asm/io.h>
+#include <asm/prom.h>
+#include <asm/pci-bridge.h>
+#include <asm/machdep.h>
+#include <asm/ppc-pci.h>
+#include <asm/opal.h>
+#include <asm/iommu.h>
+#include <asm/tce.h>
+#include <asm/abs_addr.h>
+
+#include "powernv.h"
+#include "pci.h"
+
+struct resource_wrap {
+ struct list_head link;
+ resource_size_t size;
+ resource_size_t align;
+ struct pci_dev *dev; /* Set if it's a device */
+ struct pci_bus *bus; /* Set if it's a bridge */
+};
+
+static int __pe_printk(const char *level, const struct pnv_ioda_pe *pe,
+ struct va_format *vaf)
+{
+ char pfix[32];
+
+ if (pe->pdev)
+ strlcpy(pfix, dev_name(&pe->pdev->dev), sizeof(pfix));
+ else
+ sprintf(pfix, "%04x:%02x ",
+ pci_domain_nr(pe->pbus), pe->pbus->number);
+ return printk("pci %s%s: [PE# %.3d] %pV", level, pfix, pe->pe_number, vaf);
+}
+
+#define define_pe_printk_level(func, kern_level) \
+static int func(const struct pnv_ioda_pe *pe, const char *fmt, ...) \
+{ \
+ struct va_format vaf; \
+ va_list args; \
+ int r; \
+ \
+ va_start(args, fmt); \
+ \
+ vaf.fmt = fmt; \
+ vaf.va = &args; \
+ \
+ r = __pe_printk(kern_level, pe, &vaf); \
+ va_end(args); \
+ \
+ return r; \
+} \
+
+define_pe_printk_level(pe_err, KERN_ERR);
+define_pe_printk_level(pe_warn, KERN_WARNING);
+define_pe_printk_level(pe_info, KERN_INFO);
+
+
+/* Calculate resource usage & alignment requirement of a single
+ * device. This will also assign all resources within the device
+ * for a given type starting at 0 for the biggest one and then
+ * assigning in decreasing order of size.
+ */
+static void __devinit pnv_ioda_calc_dev(struct pci_dev *dev, unsigned int flags,
+ resource_size_t *size,
+ resource_size_t *align)
+{
+ resource_size_t start;
+ struct resource *r;
+ int i;
+
+ pr_devel(" -> CDR %s\n", pci_name(dev));
+
+ *size = *align = 0;
+
+ /* Clear the resources out and mark them all unset */
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ r = &dev->resource[i];
+ if (!(r->flags & flags))
+ continue;
+ if (r->start) {
+ r->end -= r->start;
+ r->start = 0;
+ }
+ r->flags |= IORESOURCE_UNSET;
+ }
+
+ /* We currently keep all memory resources together, we
+ * will handle prefetch & 64-bit separately in the future
+ * but for now we stick everybody in M32
+ */
+ start = 0;
+ for (;;) {
+ resource_size_t max_size = 0;
+ int max_no = -1;
+
+ /* Find next biggest resource */
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ r = &dev->resource[i];
+ if (!(r->flags & IORESOURCE_UNSET) ||
+ !(r->flags & flags))
+ continue;
+ if (resource_size(r) > max_size) {
+ max_size = resource_size(r);
+ max_no = i;
+ }
+ }
+ if (max_no < 0)
+ break;
+ r = &dev->resource[max_no];
+ if (max_size > *align)
+ *align = max_size;
+ *size += max_size;
+ r->start = start;
+ start += max_size;
+ r->end = r->start + max_size - 1;
+ r->flags &= ~IORESOURCE_UNSET;
+ pr_devel(" -> R%d %016llx..%016llx\n",
+ max_no, r->start, r->end);
+ }
+ pr_devel(" <- CDR %s size=%llx align=%llx\n",
+ pci_name(dev), *size, *align);
+}
+
+/* Allocate a resource "wrap" for a given device or bridge and
+ * insert it at the right position in the sorted list
+ */
+static void __devinit pnv_ioda_add_wrap(struct list_head *list,
+ struct pci_bus *bus,
+ struct pci_dev *dev,
+ resource_size_t size,
+ resource_size_t align)
+{
+ struct resource_wrap *w1, *w = kzalloc(sizeof(*w), GFP_KERNEL);
+
+ w->size = size;
+ w->align = align;
+ w->dev = dev;
+ w->bus = bus;
+
+ list_for_each_entry(w1, list, link) {
+ if (w1->align < align) {
+ list_add_tail(&w->link, &w1->link);
+ return;
+ }
+ }
+ list_add_tail(&w->link, list);
+}
+
+/* Offset device resources of a given type */
+static void __devinit pnv_ioda_offset_dev(struct pci_dev *dev,
+ unsigned int flags,
+ resource_size_t offset)
+{
+ struct resource *r;
+ int i;
+
+ pr_devel(" -> ODR %s [%x] +%016llx\n", pci_name(dev), flags, offset);
+
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ r = &dev->resource[i];
+ if (r->flags & flags) {
+ dev->resource[i].start += offset;
+ dev->resource[i].end += offset;
+ }
+ }
+
+ pr_devel(" <- ODR %s [%x] +%016llx\n", pci_name(dev), flags, offset);
+}
+
+/* Offset bus resources (& all children) of a given type */
+static void __devinit pnv_ioda_offset_bus(struct pci_bus *bus,
+ unsigned int flags,
+ resource_size_t offset)
+{
+ struct resource *r;
+ struct pci_dev *dev;
+ struct pci_bus *cbus;
+ int i;
+
+ pr_devel(" -> OBR %s [%x] +%016llx\n",
+ bus->self ? pci_name(bus->self) : "root", flags, offset);
+
+ pci_bus_for_each_resource(bus, r, i) {
+ if (r && (r->flags & flags)) {
+ r->start += offset;
+ r->end += offset;
+ }
+ }
+ list_for_each_entry(dev, &bus->devices, bus_list)
+ pnv_ioda_offset_dev(dev, flags, offset);
+ list_for_each_entry(cbus, &bus->children, node)
+ pnv_ioda_offset_bus(cbus, flags, offset);
+
+ pr_devel(" <- OBR %s [%x]\n",
+ bus->self ? pci_name(bus->self) : "root", flags);
+}
+
+/* This is the guts of our IODA resource allocation. This is called
+ * recursively for each bus in the system. It calculates all the
+ * necessary size and requirements for children and assign them
+ * resources such that:
+ *
+ * - Each function fits in it's own contiguous set of IO/M32
+ * segment
+ *
+ * - All segments behind a P2P bridge are contiguous and obey
+ * alignment constraints of those bridges
+ */
+static void __devinit pnv_ioda_calc_bus(struct pci_bus *bus, unsigned int flags,
+ resource_size_t *size,
+ resource_size_t *align)
+{
+ struct pci_controller *hose = pci_bus_to_host(bus);
+ struct pnv_phb *phb = hose->private_data;
+ resource_size_t dev_size, dev_align, start;
+ resource_size_t min_align, min_balign;
+ struct pci_dev *cdev;
+ struct pci_bus *cbus;
+ struct list_head head;
+ struct resource_wrap *w;
+ unsigned int bres;
+
+ *size = *align = 0;
+
+ pr_devel("-> CBR %s [%x]\n",
+ bus->self ? pci_name(bus->self) : "root", flags);
+
+ /* Calculate alignment requirements based on the type
+ * of resource we are working on
+ */
+ if (flags & IORESOURCE_IO) {
+ bres = 0;
+ min_align = phb->ioda.io_segsize;
+ min_balign = 0x1000;
+ } else {
+ bres = 1;
+ min_align = phb->ioda.m32_segsize;
+ min_balign = 0x100000;
+ }
+
+ /* Gather all our children resources ordered by alignment */
+ INIT_LIST_HEAD(&head);
+
+ /* - Busses */
+ list_for_each_entry(cbus, &bus->children, node) {
+ pnv_ioda_calc_bus(cbus, flags, &dev_size, &dev_align);
+ pnv_ioda_add_wrap(&head, cbus, NULL, dev_size, dev_align);
+ }
+
+ /* - Devices */
+ list_for_each_entry(cdev, &bus->devices, bus_list) {
+ pnv_ioda_calc_dev(cdev, flags, &dev_size, &dev_align);
+ /* Align them to segment size */
+ if (dev_align < min_align)
+ dev_align = min_align;
+ pnv_ioda_add_wrap(&head, NULL, cdev, dev_size, dev_align);
+ }
+ if (list_empty(&head))
+ goto empty;
+
+ /* Now we can do two things: assign offsets to them within that
+ * level and get our total alignment & size requirements. The
+ * assignment algorithm is going to be uber-trivial for now, we
+ * can try to be smarter later at filling out holes.
+ */
+ if (bus->self) {
+ /* No offset for downstream bridges */
+ start = 0;
+ } else {
+ /* Offset from the root */
+ if (flags & IORESOURCE_IO)
+ /* Don't hand out IO 0 */
+ start = hose->io_resource.start + 0x1000;
+ else
+ start = hose->mem_resources[0].start;
+ }
+ while(!list_empty(&head)) {
+ w = list_first_entry(&head, struct resource_wrap, link);
+ list_del(&w->link);
+ if (w->size) {
+ if (start) {
+ start = ALIGN(start, w->align);
+ if (w->dev)
+ pnv_ioda_offset_dev(w->dev,flags,start);
+ else if (w->bus)
+ pnv_ioda_offset_bus(w->bus,flags,start);
+ }
+ if (w->align > *align)
+ *align = w->align;
+ }
+ start += w->size;
+ kfree(w);
+ }
+ *size = start;
+
+ /* Align and setup bridge resources */
+ *align = max_t(resource_size_t, *align,
+ max_t(resource_size_t, min_align, min_balign));
+ *size = ALIGN(*size,
+ max_t(resource_size_t, min_align, min_balign));
+ empty:
+ /* Only setup P2P's, not the PHB itself */
+ if (bus->self) {
+ struct resource *res = bus->resource[bres];
+
+ if (WARN_ON(res == NULL))
+ return;
+
+ /*
+ * FIXME: We should probably export and call
+ * pci_bridge_check_ranges() to properly re-initialize
+ * the PCI portion of the flags here, and to detect
+ * what the bridge actually supports.
+ */
+ res->start = 0;
+ res->flags = (*size) ? flags : 0;
+ res->end = (*size) ? (*size - 1) : 0;
+ }
+
+ pr_devel("<- CBR %s [%x] *size=%016llx *align=%016llx\n",
+ bus->self ? pci_name(bus->self) : "root", flags,*size,*align);
+}
+
+static struct pci_dn *pnv_ioda_get_pdn(struct pci_dev *dev)
+{
+ struct device_node *np;
+
+ np = pci_device_to_OF_node(dev);
+ if (!np)
+ return NULL;
+ return PCI_DN(np);
+}
+
+static void __devinit pnv_ioda_setup_pe_segments(struct pci_dev *dev)
+{
+ struct pci_controller *hose = pci_bus_to_host(dev->bus);
+ struct pnv_phb *phb = hose->private_data;
+ struct pci_dn *pdn = pnv_ioda_get_pdn(dev);
+ unsigned int pe, i;
+ resource_size_t pos;
+ struct resource io_res;
+ struct resource m32_res;
+ struct pci_bus_region region;
+ int rc;
+
+ /* Anything not referenced in the device-tree gets PE#0 */
+ pe = pdn ? pdn->pe_number : 0;
+
+ /* Calculate the device min/max */
+ io_res.start = m32_res.start = (resource_size_t)-1;
+ io_res.end = m32_res.end = 0;
+ io_res.flags = IORESOURCE_IO;
+ m32_res.flags = IORESOURCE_MEM;
+
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ struct resource *r = NULL;
+ if (dev->resource[i].flags & IORESOURCE_IO)
+ r = &io_res;
+ if (dev->resource[i].flags & IORESOURCE_MEM)
+ r = &m32_res;
+ if (!r)
+ continue;
+ if (dev->resource[i].start < r->start)
+ r->start = dev->resource[i].start;
+ if (dev->resource[i].end > r->end)
+ r->end = dev->resource[i].end;
+ }
+
+ /* Setup IO segments */
+ if (io_res.start < io_res.end) {
+ pcibios_resource_to_bus(dev, &region, &io_res);
+ pos = region.start;
+ i = pos / phb->ioda.io_segsize;
+ while(i < phb->ioda.total_pe && pos <= region.end) {
+ if (phb->ioda.io_segmap[i]) {
+ pr_err("%s: Trying to use IO seg #%d which is"
+ " already used by PE# %d\n",
+ pci_name(dev), i,
+ phb->ioda.io_segmap[i]);
+ /* XXX DO SOMETHING TO DISABLE DEVICE ? */
+ break;
+ }
+ phb->ioda.io_segmap[i] = pe;
+ rc = opal_pci_map_pe_mmio_window(phb->opal_id, pe,
+ OPAL_IO_WINDOW_TYPE,
+ 0, i);
+ if (rc != OPAL_SUCCESS) {
+ pr_err("%s: OPAL error %d setting up mapping"
+ " for IO seg# %d\n",
+ pci_name(dev), rc, i);
+ /* XXX DO SOMETHING TO DISABLE DEVICE ? */
+ break;
+ }
+ pos += phb->ioda.io_segsize;
+ i++;
+ };
+ }
+
+ /* Setup M32 segments */
+ if (m32_res.start < m32_res.end) {
+ pcibios_resource_to_bus(dev, &region, &m32_res);
+ pos = region.start;
+ i = pos / phb->ioda.m32_segsize;
+ while(i < phb->ioda.total_pe && pos <= region.end) {
+ if (phb->ioda.m32_segmap[i]) {
+ pr_err("%s: Trying to use M32 seg #%d which is"
+ " already used by PE# %d\n",
+ pci_name(dev), i,
+ phb->ioda.m32_segmap[i]);
+ /* XXX DO SOMETHING TO DISABLE DEVICE ? */
+ break;
+ }
+ phb->ioda.m32_segmap[i] = pe;
+ rc = opal_pci_map_pe_mmio_window(phb->opal_id, pe,
+ OPAL_M32_WINDOW_TYPE,
+ 0, i);
+ if (rc != OPAL_SUCCESS) {
+ pr_err("%s: OPAL error %d setting up mapping"
+ " for M32 seg# %d\n",
+ pci_name(dev), rc, i);
+ /* XXX DO SOMETHING TO DISABLE DEVICE ? */
+ break;
+ }
+ pos += phb->ioda.m32_segsize;
+ i++;
+ }
+ }
+}
+
+/* Check if a resource still fits in the total IO or M32 range
+ * for a given PHB
+ */
+static int __devinit pnv_ioda_resource_fit(struct pci_controller *hose,
+ struct resource *r)
+{
+ struct resource *bounds;
+
+ if (r->flags & IORESOURCE_IO)
+ bounds = &hose->io_resource;
+ else if (r->flags & IORESOURCE_MEM)
+ bounds = &hose->mem_resources[0];
+ else
+ return 1;
+
+ if (r->start >= bounds->start && r->end <= bounds->end)
+ return 1;
+ r->flags = 0;
+ return 0;
+}
+
+static void __devinit pnv_ioda_update_resources(struct pci_bus *bus)
+{
+ struct pci_controller *hose = pci_bus_to_host(bus);
+ struct pci_bus *cbus;
+ struct pci_dev *cdev;
+ unsigned int i;
+
+ /* We used to clear all device enables here. However it looks like
+ * clearing MEM enable causes Obsidian (IPR SCS) to go bonkers,
+ * and shoot fatal errors to the PHB which in turns fences itself
+ * and we can't recover from that ... yet. So for now, let's leave
+ * the enables as-is and hope for the best.
+ */
+
+ /* Check if bus resources fit in our IO or M32 range */
+ for (i = 0; bus->self && (i < 2); i++) {
+ struct resource *r = bus->resource[i];
+ if (r && !pnv_ioda_resource_fit(hose, r))
+ pr_err("%s: Bus %d resource %d disabled, no room\n",
+ pci_name(bus->self), bus->number, i);
+ }
+
+ /* Update self if it's not a PHB */
+ if (bus->self)
+ pci_setup_bridge(bus);
+
+ /* Update child devices */
+ list_for_each_entry(cdev, &bus->devices, bus_list) {
+ /* Check if resource fits, if not, disabled it */
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++) {
+ struct resource *r = &cdev->resource[i];
+ if (!pnv_ioda_resource_fit(hose, r))
+ pr_err("%s: Resource %d disabled, no room\n",
+ pci_name(cdev), i);
+ }
+
+ /* Assign segments */
+ pnv_ioda_setup_pe_segments(cdev);
+
+ /* Update HW BARs */
+ for (i = 0; i <= PCI_ROM_RESOURCE; i++)
+ pci_update_resource(cdev, i);
+ }
+
+ /* Update child busses */
+ list_for_each_entry(cbus, &bus->children, node)
+ pnv_ioda_update_resources(cbus);
+}
+
+static int __devinit pnv_ioda_alloc_pe(struct pnv_phb *phb)
+{
+ unsigned long pe;
+
+ do {
+ pe = find_next_zero_bit(phb->ioda.pe_alloc,
+ phb->ioda.total_pe, 0);
+ if (pe >= phb->ioda.total_pe)
+ return IODA_INVALID_PE;
+ } while(test_and_set_bit(pe, phb->ioda.pe_alloc));
+
+ phb->ioda.pe_array[pe].pe_number = pe;
+ return pe;
+}
+
+static void __devinit pnv_ioda_free_pe(struct pnv_phb *phb, int pe)
+{
+ WARN_ON(phb->ioda.pe_array[pe].pdev);
+
+ memset(&phb->ioda.pe_array[pe], 0, sizeof(struct pnv_ioda_pe));
+ clear_bit(pe, phb->ioda.pe_alloc);
+}
+
+/* Currently those 2 are only used when MSIs are enabled, this will change
+ * but in the meantime, we need to protect them to avoid warnings
+ */
+#ifdef CONFIG_PCI_MSI
+static struct pnv_ioda_pe * __devinit __pnv_ioda_get_one_pe(struct pci_dev *dev)
+{
+ struct pci_controller *hose = pci_bus_to_host(dev->bus);
+ struct pnv_phb *phb = hose->private_data;
+ struct pci_dn *pdn = pnv_ioda_get_pdn(dev);
+
+ if (!pdn)
+ return NULL;
+ if (pdn->pe_number == IODA_INVALID_PE)
+ return NULL;
+ return &phb->ioda.pe_array[pdn->pe_number];
+}
+
+static struct pnv_ioda_pe * __devinit pnv_ioda_get_pe(struct pci_dev *dev)
+{
+ struct pnv_ioda_pe *pe = __pnv_ioda_get_one_pe(dev);
+
+ while (!pe && dev->bus->self) {
+ dev = dev->bus->self;
+ pe = __pnv_ioda_get_one_pe(dev);
+ if (pe)
+ pe = pe->bus_pe;
+ }
+ return pe;
+}
+#endif /* CONFIG_PCI_MSI */
+
+static int __devinit pnv_ioda_configure_pe(struct pnv_phb *phb,
+ struct pnv_ioda_pe *pe)
+{
+ struct pci_dev *parent;
+ uint8_t bcomp, dcomp, fcomp;
+ long rc, rid_end, rid;
+
+ /* Bus validation ? */
+ if (pe->pbus) {
+ int count;
+
+ dcomp = OPAL_IGNORE_RID_DEVICE_NUMBER;
+ fcomp = OPAL_IGNORE_RID_FUNCTION_NUMBER;
+ parent = pe->pbus->self;
+ count = pe->pbus->subordinate - pe->pbus->secondary + 1;
+ switch(count) {
+ case 1: bcomp = OpalPciBusAll; break;
+ case 2: bcomp = OpalPciBus7Bits; break;
+ case 4: bcomp = OpalPciBus6Bits; break;
+ case 8: bcomp = OpalPciBus5Bits; break;
+ case 16: bcomp = OpalPciBus4Bits; break;
+ case 32: bcomp = OpalPciBus3Bits; break;
+ default:
+ pr_err("%s: Number of subordinate busses %d"
+ " unsupported\n",
+ pci_name(pe->pbus->self), count);
+ /* Do an exact match only */
+ bcomp = OpalPciBusAll;
+ }
+ rid_end = pe->rid + (count << 8);
+ } else {
+ parent = pe->pdev->bus->self;
+ bcomp = OpalPciBusAll;
+ dcomp = OPAL_COMPARE_RID_DEVICE_NUMBER;
+ fcomp = OPAL_COMPARE_RID_FUNCTION_NUMBER;
+ rid_end = pe->rid + 1;
+ }
+
+ /* Associate PE in PELT */
+ rc = opal_pci_set_pe(phb->opal_id, pe->pe_number, pe->rid,
+ bcomp, dcomp, fcomp, OPAL_MAP_PE);
+ if (rc) {
+ pe_err(pe, "OPAL error %ld trying to setup PELT table\n", rc);
+ return -ENXIO;
+ }
+ opal_pci_eeh_freeze_clear(phb->opal_id, pe->pe_number,
+ OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
+
+ /* Add to all parents PELT-V */
+ while (parent) {
+ struct pci_dn *pdn = pnv_ioda_get_pdn(parent);
+ if (pdn && pdn->pe_number != IODA_INVALID_PE) {
+ rc = opal_pci_set_peltv(phb->opal_id, pdn->pe_number,
+ pe->pe_number, OPAL_ADD_PE_TO_DOMAIN);
+ /* XXX What to do in case of error ? */
+ }
+ parent = parent->bus->self;
+ }
+ /* Setup reverse map */
+ for (rid = pe->rid; rid < rid_end; rid++)
+ phb->ioda.pe_rmap[rid] = pe->pe_number;
+
+ /* Setup one MVTs on IODA1 */
+ if (phb->type == PNV_PHB_IODA1) {
+ pe->mve_number = pe->pe_number;
+ rc = opal_pci_set_mve(phb->opal_id, pe->mve_number,
+ pe->pe_number);
+ if (rc) {
+ pe_err(pe, "OPAL error %ld setting up MVE %d\n",
+ rc, pe->mve_number);
+ pe->mve_number = -1;
+ } else {
+ rc = opal_pci_set_mve_enable(phb->opal_id,
+ pe->mve_number, OPAL_ENABLE_MVE);
+ if (rc) {
+ pe_err(pe, "OPAL error %ld enabling MVE %d\n",
+ rc, pe->mve_number);
+ pe->mve_number = -1;
+ }
+ }
+ } else if (phb->type == PNV_PHB_IODA2)
+ pe->mve_number = 0;
+
+ return 0;
+}
+
+static void __devinit pnv_ioda_link_pe_by_weight(struct pnv_phb *phb,
+ struct pnv_ioda_pe *pe)
+{
+ struct pnv_ioda_pe *lpe;
+
+ list_for_each_entry(lpe, &phb->ioda.pe_list, link) {
+ if (lpe->dma_weight < pe->dma_weight) {
+ list_add_tail(&pe->link, &lpe->link);
+ return;
+ }
+ }
+ list_add_tail(&pe->link, &phb->ioda.pe_list);
+}
+
+static unsigned int pnv_ioda_dma_weight(struct pci_dev *dev)
+{
+ /* This is quite simplistic. The "base" weight of a device
+ * is 10. 0 means no DMA is to be accounted for it.
+ */
+
+ /* If it's a bridge, no DMA */
+ if (dev->hdr_type != PCI_HEADER_TYPE_NORMAL)
+ return 0;
+
+ /* Reduce the weight of slow USB controllers */
+ if (dev->class == PCI_CLASS_SERIAL_USB_UHCI ||
+ dev->class == PCI_CLASS_SERIAL_USB_OHCI ||
+ dev->class == PCI_CLASS_SERIAL_USB_EHCI)
+ return 3;
+
+ /* Increase the weight of RAID (includes Obsidian) */
+ if ((dev->class >> 8) == PCI_CLASS_STORAGE_RAID)
+ return 15;
+
+ /* Default */
+ return 10;
+}
+
+static struct pnv_ioda_pe * __devinit pnv_ioda_setup_dev_PE(struct pci_dev *dev)
+{
+ struct pci_controller *hose = pci_bus_to_host(dev->bus);
+ struct pnv_phb *phb = hose->private_data;
+ struct pci_dn *pdn = pnv_ioda_get_pdn(dev);
+ struct pnv_ioda_pe *pe;
+ int pe_num;
+
+ if (!pdn) {
+ pr_err("%s: Device tree node not associated properly\n",
+ pci_name(dev));
+ return NULL;
+ }
+ if (pdn->pe_number != IODA_INVALID_PE)
+ return NULL;
+
+ /* PE#0 has been pre-set */
+ if (dev->bus->number == 0)
+ pe_num = 0;
+ else
+ pe_num = pnv_ioda_alloc_pe(phb);
+ if (pe_num == IODA_INVALID_PE) {
+ pr_warning("%s: Not enough PE# available, disabling device\n",
+ pci_name(dev));
+ return NULL;
+ }
+
+ /* NOTE: We get only one ref to the pci_dev for the pdn, not for the
+ * pointer in the PE data structure, both should be destroyed at the
+ * same time. However, this needs to be looked at more closely again
+ * once we actually start removing things (Hotplug, SR-IOV, ...)
+ *
+ * At some point we want to remove the PDN completely anyways
+ */
+ pe = &phb->ioda.pe_array[pe_num];
+ pci_dev_get(dev);
+ pdn->pcidev = dev;
+ pdn->pe_number = pe_num;
+ pe->pdev = dev;
+ pe->pbus = NULL;
+ pe->tce32_seg = -1;
+ pe->mve_number = -1;
+ pe->rid = dev->bus->number << 8 | pdn->devfn;
+
+ pe_info(pe, "Associated device to PE\n");
+
+ if (pnv_ioda_configure_pe(phb, pe)) {
+ /* XXX What do we do here ? */
+ if (pe_num)
+ pnv_ioda_free_pe(phb, pe_num);
+ pdn->pe_number = IODA_INVALID_PE;
+ pe->pdev = NULL;
+ pci_dev_put(dev);
+ return NULL;
+ }
+
+ /* Assign a DMA weight to the device */
+ pe->dma_weight = pnv_ioda_dma_weight(dev);
+ if (pe->dma_weight != 0) {
+ phb->ioda.dma_weight += pe->dma_weight;
+ phb->ioda.dma_pe_count++;
+ }
+
+ /* Link the PE */
+ pnv_ioda_link_pe_by_weight(phb, pe);
+
+ return pe;
+}
+
+static void pnv_ioda_setup_same_PE(struct pci_bus *bus, struct pnv_ioda_pe *pe)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ struct pci_dn *pdn = pnv_ioda_get_pdn(dev);
+
+ if (pdn == NULL) {
+ pr_warn("%s: No device node associated with device !\n",
+ pci_name(dev));
+ continue;
+ }
+ pci_dev_get(dev);
+ pdn->pcidev = dev;
+ pdn->pe_number = pe->pe_number;
+ pe->dma_weight += pnv_ioda_dma_weight(dev);
+ if (dev->subordinate)
+ pnv_ioda_setup_same_PE(dev->subordinate, pe);
+ }
+}
+
+static void __devinit pnv_ioda_setup_bus_PE(struct pci_dev *dev,
+ struct pnv_ioda_pe *ppe)
+{
+ struct pci_controller *hose = pci_bus_to_host(dev->bus);
+ struct pnv_phb *phb = hose->private_data;
+ struct pci_bus *bus = dev->subordinate;
+ struct pnv_ioda_pe *pe;
+ int pe_num;
+
+ if (!bus) {
+ pr_warning("%s: Bridge without a subordinate bus !\n",
+ pci_name(dev));
+ return;
+ }
+ pe_num = pnv_ioda_alloc_pe(phb);
+ if (pe_num == IODA_INVALID_PE) {
+ pr_warning("%s: Not enough PE# available, disabling bus\n",
+ pci_name(dev));
+ return;
+ }
+
+ pe = &phb->ioda.pe_array[pe_num];
+ ppe->bus_pe = pe;
+ pe->pbus = bus;
+ pe->pdev = NULL;
+ pe->tce32_seg = -1;
+ pe->mve_number = -1;
+ pe->rid = bus->secondary << 8;
+ pe->dma_weight = 0;
+
+ pe_info(pe, "Secondary busses %d..%d associated with PE\n",
+ bus->secondary, bus->subordinate);
+
+ if (pnv_ioda_configure_pe(phb, pe)) {
+ /* XXX What do we do here ? */
+ if (pe_num)
+ pnv_ioda_free_pe(phb, pe_num);
+ pe->pbus = NULL;
+ return;
+ }
+
+ /* Associate it with all child devices */
+ pnv_ioda_setup_same_PE(bus, pe);
+
+ /* Account for one DMA PE if at least one DMA capable device exist
+ * below the bridge
+ */
+ if (pe->dma_weight != 0) {
+ phb->ioda.dma_weight += pe->dma_weight;
+ phb->ioda.dma_pe_count++;
+ }
+
+ /* Link the PE */
+ pnv_ioda_link_pe_by_weight(phb, pe);
+}
+
+static void __devinit pnv_ioda_setup_PEs(struct pci_bus *bus)
+{
+ struct pci_dev *dev;
+ struct pnv_ioda_pe *pe;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ pe = pnv_ioda_setup_dev_PE(dev);
+ if (pe == NULL)
+ continue;
+ /* Leaving the PCIe domain ... single PE# */
+ if (dev->pcie_type == PCI_EXP_TYPE_PCI_BRIDGE)
+ pnv_ioda_setup_bus_PE(dev, pe);
+ else if (dev->subordinate)
+ pnv_ioda_setup_PEs(dev->subordinate);
+ }
+}
+
+static void __devinit pnv_pci_ioda_dma_dev_setup(struct pnv_phb *phb,
+ struct pci_dev *dev)
+{
+ /* We delay DMA setup after we have assigned all PE# */
+}
+
+static void __devinit pnv_ioda_setup_bus_dma(struct pnv_ioda_pe *pe,
+ struct pci_bus *bus)
+{
+ struct pci_dev *dev;
+
+ list_for_each_entry(dev, &bus->devices, bus_list) {
+ set_iommu_table_base(&dev->dev, &pe->tce32_table);
+ if (dev->subordinate)
+ pnv_ioda_setup_bus_dma(pe, dev->subordinate);
+ }
+}
+
+static void __devinit pnv_pci_ioda_setup_dma_pe(struct pnv_phb *phb,
+ struct pnv_ioda_pe *pe,
+ unsigned int base,
+ unsigned int segs)
+{
+
+ struct page *tce_mem = NULL;
+ const __be64 *swinvp;
+ struct iommu_table *tbl;
+ unsigned int i;
+ int64_t rc;
+ void *addr;
+
+ /* 256M DMA window, 4K TCE pages, 8 bytes TCE */
+#define TCE32_TABLE_SIZE ((0x10000000 / 0x1000) * 8)
+
+ /* XXX FIXME: Handle 64-bit only DMA devices */
+ /* XXX FIXME: Provide 64-bit DMA facilities & non-4K TCE tables etc.. */
+ /* XXX FIXME: Allocate multi-level tables on PHB3 */
+
+ /* We shouldn't already have a 32-bit DMA associated */
+ if (WARN_ON(pe->tce32_seg >= 0))
+ return;
+
+ /* Grab a 32-bit TCE table */
+ pe->tce32_seg = base;
+ pe_info(pe, " Setting up 32-bit TCE table at %08x..%08x\n",
+ (base << 28), ((base + segs) << 28) - 1);
+
+ /* XXX Currently, we allocate one big contiguous table for the
+ * TCEs. We only really need one chunk per 256M of TCE space
+ * (ie per segment) but that's an optimization for later, it
+ * requires some added smarts with our get/put_tce implementation
+ */
+ tce_mem = alloc_pages_node(phb->hose->node, GFP_KERNEL,
+ get_order(TCE32_TABLE_SIZE * segs));
+ if (!tce_mem) {
+ pe_err(pe, " Failed to allocate a 32-bit TCE memory\n");
+ goto fail;
+ }
+ addr = page_address(tce_mem);
+ memset(addr, 0, TCE32_TABLE_SIZE * segs);
+
+ /* Configure HW */
+ for (i = 0; i < segs; i++) {
+ rc = opal_pci_map_pe_dma_window(phb->opal_id,
+ pe->pe_number,
+ base + i, 1,
+ __pa(addr) + TCE32_TABLE_SIZE * i,
+ TCE32_TABLE_SIZE, 0x1000);
+ if (rc) {
+ pe_err(pe, " Failed to configure 32-bit TCE table,"
+ " err %ld\n", rc);
+ goto fail;
+ }
+ }
+
+ /* Setup linux iommu table */
+ tbl = &pe->tce32_table;
+ pnv_pci_setup_iommu_table(tbl, addr, TCE32_TABLE_SIZE * segs,
+ base << 28);
+
+ /* OPAL variant of P7IOC SW invalidated TCEs */
+ swinvp = of_get_property(phb->hose->dn, "ibm,opal-tce-kill", NULL);
+ if (swinvp) {
+ /* We need a couple more fields -- an address and a data
+ * to or. Since the bus is only printed out on table free
+ * errors, and on the first pass the data will be a relative
+ * bus number, print that out instead.
+ */
+ tbl->it_busno = 0;
+ tbl->it_index = (unsigned long)ioremap(be64_to_cpup(swinvp), 8);
+ tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE
+ | TCE_PCI_SWINV_PAIR;
+ }
+ iommu_init_table(tbl, phb->hose->node);
+
+ if (pe->pdev)
+ set_iommu_table_base(&pe->pdev->dev, tbl);
+ else
+ pnv_ioda_setup_bus_dma(pe, pe->pbus);
+
+ return;
+ fail:
+ /* XXX Failure: Try to fallback to 64-bit only ? */
+ if (pe->tce32_seg >= 0)
+ pe->tce32_seg = -1;
+ if (tce_mem)
+ __free_pages(tce_mem, get_order(TCE32_TABLE_SIZE * segs));
+}
+
+static void __devinit pnv_ioda_setup_dma(struct pnv_phb *phb)
+{
+ struct pci_controller *hose = phb->hose;
+ unsigned int residual, remaining, segs, tw, base;
+ struct pnv_ioda_pe *pe;
+
+ /* If we have more PE# than segments available, hand out one
+ * per PE until we run out and let the rest fail. If not,
+ * then we assign at least one segment per PE, plus more based
+ * on the amount of devices under that PE
+ */
+ if (phb->ioda.dma_pe_count > phb->ioda.tce32_count)
+ residual = 0;
+ else
+ residual = phb->ioda.tce32_count -
+ phb->ioda.dma_pe_count;
+
+ pr_info("PCI: Domain %04x has %ld available 32-bit DMA segments\n",
+ hose->global_number, phb->ioda.tce32_count);
+ pr_info("PCI: %d PE# for a total weight of %d\n",
+ phb->ioda.dma_pe_count, phb->ioda.dma_weight);
+
+ /* Walk our PE list and configure their DMA segments, hand them
+ * out one base segment plus any residual segments based on
+ * weight
+ */
+ remaining = phb->ioda.tce32_count;
+ tw = phb->ioda.dma_weight;
+ base = 0;
+ list_for_each_entry(pe, &phb->ioda.pe_list, link) {
+ if (!pe->dma_weight)
+ continue;
+ if (!remaining) {
+ pe_warn(pe, "No DMA32 resources available\n");
+ continue;
+ }
+ segs = 1;
+ if (residual) {
+ segs += ((pe->dma_weight * residual) + (tw / 2)) / tw;
+ if (segs > remaining)
+ segs = remaining;
+ }
+ pe_info(pe, "DMA weight %d, assigned %d DMA32 segments\n",
+ pe->dma_weight, segs);
+ pnv_pci_ioda_setup_dma_pe(phb, pe, base, segs);
+ remaining -= segs;
+ base += segs;
+ }
+}
+
+#ifdef CONFIG_PCI_MSI
+static int pnv_pci_ioda_msi_setup(struct pnv_phb *phb, struct pci_dev *dev,
+ unsigned int hwirq, unsigned int is_64,
+ struct msi_msg *msg)
+{
+ struct pnv_ioda_pe *pe = pnv_ioda_get_pe(dev);
+ unsigned int xive_num = hwirq - phb->msi_base;
+ uint64_t addr64;
+ uint32_t addr32, data;
+ int rc;
+
+ /* No PE assigned ? bail out ... no MSI for you ! */
+ if (pe == NULL)
+ return -ENXIO;
+
+ /* Check if we have an MVE */
+ if (pe->mve_number < 0)
+ return -ENXIO;
+
+ /* Assign XIVE to PE */
+ rc = opal_pci_set_xive_pe(phb->opal_id, pe->pe_number, xive_num);
+ if (rc) {
+ pr_warn("%s: OPAL error %d setting XIVE %d PE\n",
+ pci_name(dev), rc, xive_num);
+ return -EIO;
+ }
+
+ if (is_64) {
+ rc = opal_get_msi_64(phb->opal_id, pe->mve_number, xive_num, 1,
+ &addr64, &data);
+ if (rc) {
+ pr_warn("%s: OPAL error %d getting 64-bit MSI data\n",
+ pci_name(dev), rc);
+ return -EIO;
+ }
+ msg->address_hi = addr64 >> 32;
+ msg->address_lo = addr64 & 0xfffffffful;
+ } else {
+ rc = opal_get_msi_32(phb->opal_id, pe->mve_number, xive_num, 1,
+ &addr32, &data);
+ if (rc) {
+ pr_warn("%s: OPAL error %d getting 32-bit MSI data\n",
+ pci_name(dev), rc);
+ return -EIO;
+ }
+ msg->address_hi = 0;
+ msg->address_lo = addr32;
+ }
+ msg->data = data;
+
+ pr_devel("%s: %s-bit MSI on hwirq %x (xive #%d),"
+ " address=%x_%08x data=%x PE# %d\n",
+ pci_name(dev), is_64 ? "64" : "32", hwirq, xive_num,
+ msg->address_hi, msg->address_lo, data, pe->pe_number);
+
+ return 0;
+}
+
+static void pnv_pci_init_ioda_msis(struct pnv_phb *phb)
+{
+ unsigned int bmap_size;
+ const __be32 *prop = of_get_property(phb->hose->dn,
+ "ibm,opal-msi-ranges", NULL);
+ if (!prop) {
+ /* BML Fallback */
+ prop = of_get_property(phb->hose->dn, "msi-ranges", NULL);
+ }
+ if (!prop)
+ return;
+
+ phb->msi_base = be32_to_cpup(prop);
+ phb->msi_count = be32_to_cpup(prop + 1);
+ bmap_size = BITS_TO_LONGS(phb->msi_count) * sizeof(unsigned long);
+ phb->msi_map = zalloc_maybe_bootmem(bmap_size, GFP_KERNEL);
+ if (!phb->msi_map) {
+ pr_err("PCI %d: Failed to allocate MSI bitmap !\n",
+ phb->hose->global_number);
+ return;
+ }
+ phb->msi_setup = pnv_pci_ioda_msi_setup;
+ phb->msi32_support = 1;
+ pr_info(" Allocated bitmap for %d MSIs (base IRQ 0x%x)\n",
+ phb->msi_count, phb->msi_base);
+}
+#else
+static void pnv_pci_init_ioda_msis(struct pnv_phb *phb) { }
+#endif /* CONFIG_PCI_MSI */
+
+/* This is the starting point of our IODA specific resource
+ * allocation process
+ */
+static void __devinit pnv_pci_ioda_fixup_phb(struct pci_controller *hose)
+{
+ resource_size_t size, align;
+ struct pci_bus *child;
+
+ /* Associate PEs per functions */
+ pnv_ioda_setup_PEs(hose->bus);
+
+ /* Calculate all resources */
+ pnv_ioda_calc_bus(hose->bus, IORESOURCE_IO, &size, &align);
+ pnv_ioda_calc_bus(hose->bus, IORESOURCE_MEM, &size, &align);
+
+ /* Apply then to HW */
+ pnv_ioda_update_resources(hose->bus);
+
+ /* Setup DMA */
+ pnv_ioda_setup_dma(hose->private_data);
+
+ /* Configure PCI Express settings */
+ list_for_each_entry(child, &hose->bus->children, node) {
+ struct pci_dev *self = child->self;
+ if (!self)
+ continue;
+ pcie_bus_configure_settings(child, self->pcie_mpss);
+ }
+}
+
+/* Prevent enabling devices for which we couldn't properly
+ * assign a PE
+ */
+static int __devinit pnv_pci_enable_device_hook(struct pci_dev *dev)
+{
+ struct pci_dn *pdn = pnv_ioda_get_pdn(dev);
+
+ if (!pdn || pdn->pe_number == IODA_INVALID_PE)
+ return -EINVAL;
+ return 0;
+}
+
+static u32 pnv_ioda_bdfn_to_pe(struct pnv_phb *phb, struct pci_bus *bus,
+ u32 devfn)
+{
+ return phb->ioda.pe_rmap[(bus->number << 8) | devfn];
+}
+
+void __init pnv_pci_init_ioda1_phb(struct device_node *np)
+{
+ struct pci_controller *hose;
+ static int primary = 1;
+ struct pnv_phb *phb;
+ unsigned long size, m32map_off, iomap_off, pemap_off;
+ const u64 *prop64;
+ u64 phb_id;
+ void *aux;
+ long rc;
+
+ pr_info(" Initializing IODA OPAL PHB %s\n", np->full_name);
+
+ prop64 = of_get_property(np, "ibm,opal-phbid", NULL);
+ if (!prop64) {
+ pr_err(" Missing \"ibm,opal-phbid\" property !\n");
+ return;
+ }
+ phb_id = be64_to_cpup(prop64);
+ pr_debug(" PHB-ID : 0x%016llx\n", phb_id);
+
+ phb = alloc_bootmem(sizeof(struct pnv_phb));
+ if (phb) {
+ memset(phb, 0, sizeof(struct pnv_phb));
+ phb->hose = hose = pcibios_alloc_controller(np);
+ }
+ if (!phb || !phb->hose) {
+ pr_err("PCI: Failed to allocate PCI controller for %s\n",
+ np->full_name);
+ return;
+ }
+
+ spin_lock_init(&phb->lock);
+ /* XXX Use device-tree */
+ hose->first_busno = 0;
+ hose->last_busno = 0xff;
+ hose->private_data = phb;
+ phb->opal_id = phb_id;
+ phb->type = PNV_PHB_IODA1;
+
+ /* Detect specific models for error handling */
+ if (of_device_is_compatible(np, "ibm,p7ioc-pciex"))
+ phb->model = PNV_PHB_MODEL_P7IOC;
+ else
+ phb->model = PNV_PHB_MODEL_UNKNOWN;
+
+ /* We parse "ranges" now since we need to deduce the register base
+ * from the IO base
+ */
+ pci_process_bridge_OF_ranges(phb->hose, np, primary);
+ primary = 0;
+
+ /* Magic formula from Milton */
+ phb->regs = of_iomap(np, 0);
+ if (phb->regs == NULL)
+ pr_err(" Failed to map registers !\n");
+
+
+ /* XXX This is hack-a-thon. This needs to be changed so that:
+ * - we obtain stuff like PE# etc... from device-tree
+ * - we properly re-allocate M32 ourselves
+ * (the OFW one isn't very good)
+ */
+
+ /* Initialize more IODA stuff */
+ phb->ioda.total_pe = 128;
+
+ phb->ioda.m32_size = resource_size(&hose->mem_resources[0]);
+ /* OFW Has already off top 64k of M32 space (MSI space) */
+ phb->ioda.m32_size += 0x10000;
+
+ phb->ioda.m32_segsize = phb->ioda.m32_size / phb->ioda.total_pe;
+ phb->ioda.m32_pci_base = hose->mem_resources[0].start -
+ hose->pci_mem_offset;
+ phb->ioda.io_size = hose->pci_io_size;
+ phb->ioda.io_segsize = phb->ioda.io_size / phb->ioda.total_pe;
+ phb->ioda.io_pci_base = 0; /* XXX calculate this ? */
+
+ /* Allocate aux data & arrays */
+ size = _ALIGN_UP(phb->ioda.total_pe / 8, sizeof(unsigned long));
+ m32map_off = size;
+ size += phb->ioda.total_pe;
+ iomap_off = size;
+ size += phb->ioda.total_pe;
+ pemap_off = size;
+ size += phb->ioda.total_pe * sizeof(struct pnv_ioda_pe);
+ aux = alloc_bootmem(size);
+ memset(aux, 0, size);
+ phb->ioda.pe_alloc = aux;
+ phb->ioda.m32_segmap = aux + m32map_off;
+ phb->ioda.io_segmap = aux + iomap_off;
+ phb->ioda.pe_array = aux + pemap_off;
+ set_bit(0, phb->ioda.pe_alloc);
+
+ INIT_LIST_HEAD(&phb->ioda.pe_list);
+
+ /* Calculate how many 32-bit TCE segments we have */
+ phb->ioda.tce32_count = phb->ioda.m32_pci_base >> 28;
+
+ /* Clear unusable m64 */
+ hose->mem_resources[1].flags = 0;
+ hose->mem_resources[1].start = 0;
+ hose->mem_resources[1].end = 0;
+ hose->mem_resources[2].flags = 0;
+ hose->mem_resources[2].start = 0;
+ hose->mem_resources[2].end = 0;
+
+#if 0
+ rc = opal_pci_set_phb_mem_window(opal->phb_id,
+ window_type,
+ window_num,
+ starting_real_address,
+ starting_pci_address,
+ segment_size);
+#endif
+
+ pr_info(" %d PE's M32: 0x%x [segment=0x%x] IO: 0x%x [segment=0x%x]\n",
+ phb->ioda.total_pe,
+ phb->ioda.m32_size, phb->ioda.m32_segsize,
+ phb->ioda.io_size, phb->ioda.io_segsize);
+
+ if (phb->regs) {
+ pr_devel(" BUID = 0x%016llx\n", in_be64(phb->regs + 0x100));
+ pr_devel(" PHB2_CR = 0x%016llx\n", in_be64(phb->regs + 0x160));
+ pr_devel(" IO_BAR = 0x%016llx\n", in_be64(phb->regs + 0x170));
+ pr_devel(" IO_BAMR = 0x%016llx\n", in_be64(phb->regs + 0x178));
+ pr_devel(" IO_SAR = 0x%016llx\n", in_be64(phb->regs + 0x180));
+ pr_devel(" M32_BAR = 0x%016llx\n", in_be64(phb->regs + 0x190));
+ pr_devel(" M32_BAMR = 0x%016llx\n", in_be64(phb->regs + 0x198));
+ pr_devel(" M32_SAR = 0x%016llx\n", in_be64(phb->regs + 0x1a0));
+ }
+ phb->hose->ops = &pnv_pci_ops;
+
+ /* Setup RID -> PE mapping function */
+ phb->bdfn_to_pe = pnv_ioda_bdfn_to_pe;
+
+ /* Setup TCEs */
+ phb->dma_dev_setup = pnv_pci_ioda_dma_dev_setup;
+
+ /* Setup MSI support */
+ pnv_pci_init_ioda_msis(phb);
+
+ /* We set both probe_only and PCI_REASSIGN_ALL_RSRC. This is an
+ * odd combination which essentially means that we skip all resource
+ * fixups and assignments in the generic code, and do it all
+ * ourselves here
+ */
+ pci_probe_only = 1;
+ ppc_md.pcibios_fixup_phb = pnv_pci_ioda_fixup_phb;
+ ppc_md.pcibios_enable_device_hook = pnv_pci_enable_device_hook;
+ pci_add_flags(PCI_REASSIGN_ALL_RSRC);
+
+ /* Reset IODA tables to a clean state */
+ rc = opal_pci_reset(phb_id, OPAL_PCI_IODA_TABLE_RESET, OPAL_ASSERT_RESET);
+ if (rc)
+ pr_warning(" OPAL Error %ld performing IODA table reset !\n", rc);
+ opal_pci_set_pe(phb_id, 0, 0, 7, 1, 1 , OPAL_MAP_PE);
+}
+
+void __init pnv_pci_init_ioda_hub(struct device_node *np)
+{
+ struct device_node *phbn;
+ const u64 *prop64;
+ u64 hub_id;
+
+ pr_info("Probing IODA IO-Hub %s\n", np->full_name);
+
+ prop64 = of_get_property(np, "ibm,opal-hubid", NULL);
+ if (!prop64) {
+ pr_err(" Missing \"ibm,opal-hubid\" property !\n");
+ return;
+ }
+ hub_id = be64_to_cpup(prop64);
+ pr_devel(" HUB-ID : 0x%016llx\n", hub_id);
+
+ /* Count child PHBs */
+ for_each_child_of_node(np, phbn) {
+ /* Look for IODA1 PHBs */
+ if (of_device_is_compatible(phbn, "ibm,ioda-phb"))
+ pnv_pci_init_ioda1_phb(phbn);
+ }
+}
diff --git a/arch/powerpc/platforms/powernv/pci-p5ioc2.c b/arch/powerpc/platforms/powernv/pci-p5ioc2.c
index 4c80f7c77d56..264967770c3a 100644
--- a/arch/powerpc/platforms/powernv/pci-p5ioc2.c
+++ b/arch/powerpc/platforms/powernv/pci-p5ioc2.c
@@ -137,6 +137,7 @@ static void __init pnv_pci_init_p5ioc2_phb(struct device_node *np,
phb->hose->private_data = phb;
phb->opal_id = phb_id;
phb->type = PNV_PHB_P5IOC2;
+ phb->model = PNV_PHB_MODEL_P5IOC2;
phb->regs = of_iomap(np, 0);
diff --git a/arch/powerpc/platforms/powernv/pci.c b/arch/powerpc/platforms/powernv/pci.c
index 85bb66d7f933..f92b9ef7340e 100644
--- a/arch/powerpc/platforms/powernv/pci.c
+++ b/arch/powerpc/platforms/powernv/pci.c
@@ -52,32 +52,38 @@ static int pnv_msi_check_device(struct pci_dev* pdev, int nvec, int type)
static unsigned int pnv_get_one_msi(struct pnv_phb *phb)
{
- unsigned int id;
+ unsigned long flags;
+ unsigned int id, rc;
+
+ spin_lock_irqsave(&phb->lock, flags);
- spin_lock(&phb->lock);
id = find_next_zero_bit(phb->msi_map, phb->msi_count, phb->msi_next);
if (id >= phb->msi_count && phb->msi_next)
id = find_next_zero_bit(phb->msi_map, phb->msi_count, 0);
if (id >= phb->msi_count) {
- spin_unlock(&phb->lock);
- return 0;
+ rc = 0;
+ goto out;
}
__set_bit(id, phb->msi_map);
- spin_unlock(&phb->lock);
- return id + phb->msi_base;
+ rc = id + phb->msi_base;
+out:
+ spin_unlock_irqrestore(&phb->lock, flags);
+ return rc;
}
static void pnv_put_msi(struct pnv_phb *phb, unsigned int hwirq)
{
+ unsigned long flags;
unsigned int id;
if (WARN_ON(hwirq < phb->msi_base ||
hwirq >= (phb->msi_base + phb->msi_count)))
return;
id = hwirq - phb->msi_base;
- spin_lock(&phb->lock);
+
+ spin_lock_irqsave(&phb->lock, flags);
__clear_bit(id, phb->msi_map);
- spin_unlock(&phb->lock);
+ spin_unlock_irqrestore(&phb->lock, flags);
}
static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type)
@@ -144,6 +150,112 @@ static void pnv_teardown_msi_irqs(struct pci_dev *pdev)
}
#endif /* CONFIG_PCI_MSI */
+static void pnv_pci_dump_p7ioc_diag_data(struct pnv_phb *phb)
+{
+ struct OpalIoP7IOCPhbErrorData *data = &phb->diag.p7ioc;
+ int i;
+
+ pr_info("PHB %d diagnostic data:\n", phb->hose->global_number);
+
+ pr_info(" brdgCtl = 0x%08x\n", data->brdgCtl);
+
+ pr_info(" portStatusReg = 0x%08x\n", data->portStatusReg);
+ pr_info(" rootCmplxStatus = 0x%08x\n", data->rootCmplxStatus);
+ pr_info(" busAgentStatus = 0x%08x\n", data->busAgentStatus);
+
+ pr_info(" deviceStatus = 0x%08x\n", data->deviceStatus);
+ pr_info(" slotStatus = 0x%08x\n", data->slotStatus);
+ pr_info(" linkStatus = 0x%08x\n", data->linkStatus);
+ pr_info(" devCmdStatus = 0x%08x\n", data->devCmdStatus);
+ pr_info(" devSecStatus = 0x%08x\n", data->devSecStatus);
+
+ pr_info(" rootErrorStatus = 0x%08x\n", data->rootErrorStatus);
+ pr_info(" uncorrErrorStatus = 0x%08x\n", data->uncorrErrorStatus);
+ pr_info(" corrErrorStatus = 0x%08x\n", data->corrErrorStatus);
+ pr_info(" tlpHdr1 = 0x%08x\n", data->tlpHdr1);
+ pr_info(" tlpHdr2 = 0x%08x\n", data->tlpHdr2);
+ pr_info(" tlpHdr3 = 0x%08x\n", data->tlpHdr3);
+ pr_info(" tlpHdr4 = 0x%08x\n", data->tlpHdr4);
+ pr_info(" sourceId = 0x%08x\n", data->sourceId);
+
+ pr_info(" errorClass = 0x%016llx\n", data->errorClass);
+ pr_info(" correlator = 0x%016llx\n", data->correlator);
+
+ pr_info(" p7iocPlssr = 0x%016llx\n", data->p7iocPlssr);
+ pr_info(" p7iocCsr = 0x%016llx\n", data->p7iocCsr);
+ pr_info(" lemFir = 0x%016llx\n", data->lemFir);
+ pr_info(" lemErrorMask = 0x%016llx\n", data->lemErrorMask);
+ pr_info(" lemWOF = 0x%016llx\n", data->lemWOF);
+ pr_info(" phbErrorStatus = 0x%016llx\n", data->phbErrorStatus);
+ pr_info(" phbFirstErrorStatus = 0x%016llx\n", data->phbFirstErrorStatus);
+ pr_info(" phbErrorLog0 = 0x%016llx\n", data->phbErrorLog0);
+ pr_info(" phbErrorLog1 = 0x%016llx\n", data->phbErrorLog1);
+ pr_info(" mmioErrorStatus = 0x%016llx\n", data->mmioErrorStatus);
+ pr_info(" mmioFirstErrorStatus = 0x%016llx\n", data->mmioFirstErrorStatus);
+ pr_info(" mmioErrorLog0 = 0x%016llx\n", data->mmioErrorLog0);
+ pr_info(" mmioErrorLog1 = 0x%016llx\n", data->mmioErrorLog1);
+ pr_info(" dma0ErrorStatus = 0x%016llx\n", data->dma0ErrorStatus);
+ pr_info(" dma0FirstErrorStatus = 0x%016llx\n", data->dma0FirstErrorStatus);
+ pr_info(" dma0ErrorLog0 = 0x%016llx\n", data->dma0ErrorLog0);
+ pr_info(" dma0ErrorLog1 = 0x%016llx\n", data->dma0ErrorLog1);
+ pr_info(" dma1ErrorStatus = 0x%016llx\n", data->dma1ErrorStatus);
+ pr_info(" dma1FirstErrorStatus = 0x%016llx\n", data->dma1FirstErrorStatus);
+ pr_info(" dma1ErrorLog0 = 0x%016llx\n", data->dma1ErrorLog0);
+ pr_info(" dma1ErrorLog1 = 0x%016llx\n", data->dma1ErrorLog1);
+
+ for (i = 0; i < OPAL_P7IOC_NUM_PEST_REGS; i++) {
+ if ((data->pestA[i] >> 63) == 0 &&
+ (data->pestB[i] >> 63) == 0)
+ continue;
+ pr_info(" PE[%3d] PESTA = 0x%016llx\n", i, data->pestA[i]);
+ pr_info(" PESTB = 0x%016llx\n", data->pestB[i]);
+ }
+}
+
+static void pnv_pci_dump_phb_diag_data(struct pnv_phb *phb)
+{
+ switch(phb->model) {
+ case PNV_PHB_MODEL_P7IOC:
+ pnv_pci_dump_p7ioc_diag_data(phb);
+ break;
+ default:
+ pr_warning("PCI %d: Can't decode this PHB diag data\n",
+ phb->hose->global_number);
+ }
+}
+
+static void pnv_pci_handle_eeh_config(struct pnv_phb *phb, u32 pe_no)
+{
+ unsigned long flags, rc;
+ int has_diag;
+
+ spin_lock_irqsave(&phb->lock, flags);
+
+ rc = opal_pci_get_phb_diag_data(phb->opal_id, phb->diag.blob, PNV_PCI_DIAG_BUF_SIZE);
+ has_diag = (rc == OPAL_SUCCESS);
+
+ rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no,
+ OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
+ if (rc) {
+ pr_warning("PCI %d: Failed to clear EEH freeze state"
+ " for PE#%d, err %ld\n",
+ phb->hose->global_number, pe_no, rc);
+
+ /* For now, let's only display the diag buffer when we fail to clear
+ * the EEH status. We'll do more sensible things later when we have
+ * proper EEH support. We need to make sure we don't pollute ourselves
+ * with the normal errors generated when probing empty slots
+ */
+ if (has_diag)
+ pnv_pci_dump_phb_diag_data(phb);
+ else
+ pr_warning("PCI %d: No diag data available\n",
+ phb->hose->global_number);
+ }
+
+ spin_unlock_irqrestore(&phb->lock, flags);
+}
+
static void pnv_pci_config_check_eeh(struct pnv_phb *phb, struct pci_bus *bus,
u32 bdfn)
{
@@ -165,15 +277,8 @@ static void pnv_pci_config_check_eeh(struct pnv_phb *phb, struct pci_bus *bus,
}
cfg_dbg(" -> EEH check, bdfn=%04x PE%d fstate=%x\n",
bdfn, pe_no, fstate);
- if (fstate != 0) {
- rc = opal_pci_eeh_freeze_clear(phb->opal_id, pe_no,
- OPAL_EEH_ACTION_CLEAR_FREEZE_ALL);
- if (rc) {
- pr_warning("PCI %d: Failed to clear EEH freeze state"
- " for PE#%d, err %lld\n",
- phb->hose->global_number, pe_no, rc);
- }
- }
+ if (fstate != 0)
+ pnv_pci_handle_eeh_config(phb, pe_no);
}
static int pnv_pci_read_config(struct pci_bus *bus,
@@ -257,12 +362,54 @@ struct pci_ops pnv_pci_ops = {
.write = pnv_pci_write_config,
};
+
+static void pnv_tce_invalidate(struct iommu_table *tbl,
+ u64 *startp, u64 *endp)
+{
+ u64 __iomem *invalidate = (u64 __iomem *)tbl->it_index;
+ unsigned long start, end, inc;
+
+ start = __pa(startp);
+ end = __pa(endp);
+
+
+ /* BML uses this case for p6/p7/galaxy2: Shift addr and put in node */
+ if (tbl->it_busno) {
+ start <<= 12;
+ end <<= 12;
+ inc = 128 << 12;
+ start |= tbl->it_busno;
+ end |= tbl->it_busno;
+ }
+ /* p7ioc-style invalidation, 2 TCEs per write */
+ else if (tbl->it_type & TCE_PCI_SWINV_PAIR) {
+ start |= (1ull << 63);
+ end |= (1ull << 63);
+ inc = 16;
+ }
+ /* Default (older HW) */
+ else
+ inc = 128;
+
+ end |= inc - 1; /* round up end to be different than start */
+
+ mb(); /* Ensure above stores are visible */
+ while (start <= end) {
+ __raw_writeq(start, invalidate);
+ start += inc;
+ }
+ /* The iommu layer will do another mb() for us on build() and
+ * we don't care on free()
+ */
+}
+
+
static int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
unsigned long uaddr, enum dma_data_direction direction,
struct dma_attrs *attrs)
{
u64 proto_tce;
- u64 *tcep;
+ u64 *tcep, *tces;
u64 rpn;
proto_tce = TCE_PCI_READ; // Read allowed
@@ -270,25 +417,33 @@ static int pnv_tce_build(struct iommu_table *tbl, long index, long npages,
if (direction != DMA_TO_DEVICE)
proto_tce |= TCE_PCI_WRITE;
- tcep = ((u64 *)tbl->it_base) + index;
+ tces = tcep = ((u64 *)tbl->it_base) + index - tbl->it_offset;
+ rpn = __pa(uaddr) >> TCE_SHIFT;
- while (npages--) {
- /* can't move this out since we might cross LMB boundary */
- rpn = (virt_to_abs(uaddr)) >> TCE_SHIFT;
- *tcep = proto_tce | (rpn & TCE_RPN_MASK) << TCE_RPN_SHIFT;
+ while (npages--)
+ *(tcep++) = proto_tce | (rpn++ << TCE_RPN_SHIFT);
+
+ /* Some implementations won't cache invalid TCEs and thus may not
+ * need that flush. We'll probably turn it_type into a bit mask
+ * of flags if that becomes the case
+ */
+ if (tbl->it_type & TCE_PCI_SWINV_CREATE)
+ pnv_tce_invalidate(tbl, tces, tcep - 1);
- uaddr += TCE_PAGE_SIZE;
- tcep++;
- }
return 0;
}
static void pnv_tce_free(struct iommu_table *tbl, long index, long npages)
{
- u64 *tcep = ((u64 *)tbl->it_base) + index;
+ u64 *tcep, *tces;
+
+ tces = tcep = ((u64 *)tbl->it_base) + index - tbl->it_offset;
while (npages--)
*(tcep++) = 0;
+
+ if (tbl->it_type & TCE_PCI_SWINV_FREE)
+ pnv_tce_invalidate(tbl, tces, tcep - 1);
}
void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
@@ -308,13 +463,14 @@ static struct iommu_table * __devinit
pnv_pci_setup_bml_iommu(struct pci_controller *hose)
{
struct iommu_table *tbl;
- const __be64 *basep;
+ const __be64 *basep, *swinvp;
const __be32 *sizep;
basep = of_get_property(hose->dn, "linux,tce-base", NULL);
sizep = of_get_property(hose->dn, "linux,tce-size", NULL);
if (basep == NULL || sizep == NULL) {
- pr_err("PCI: %s has missing tce entries !\n", hose->dn->full_name);
+ pr_err("PCI: %s has missing tce entries !\n",
+ hose->dn->full_name);
return NULL;
}
tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, hose->node);
@@ -323,6 +479,15 @@ pnv_pci_setup_bml_iommu(struct pci_controller *hose)
pnv_pci_setup_iommu_table(tbl, __va(be64_to_cpup(basep)),
be32_to_cpup(sizep), 0);
iommu_init_table(tbl, hose->node);
+
+ /* Deal with SW invalidated TCEs when needed (BML way) */
+ swinvp = of_get_property(hose->dn, "linux,tce-sw-invalidate-info",
+ NULL);
+ if (swinvp) {
+ tbl->it_busno = swinvp[1];
+ tbl->it_index = (unsigned long)ioremap(swinvp[0], 8);
+ tbl->it_type = TCE_PCI_SWINV_CREATE | TCE_PCI_SWINV_FREE;
+ }
return tbl;
}
@@ -356,6 +521,13 @@ static void __devinit pnv_pci_dma_dev_setup(struct pci_dev *pdev)
pnv_pci_dma_fallback_setup(hose, pdev);
}
+/* Fixup wrong class code in p7ioc root complex */
+static void __devinit pnv_p7ioc_rc_quirk(struct pci_dev *dev)
+{
+ dev->class = PCI_CLASS_BRIDGE_PCI << 8;
+}
+DECLARE_PCI_FIXUP_EARLY(PCI_VENDOR_ID_IBM, 0x3b9, pnv_p7ioc_rc_quirk);
+
static int pnv_pci_probe_mode(struct pci_bus *bus)
{
struct pci_controller *hose = pci_bus_to_host(bus);
@@ -400,12 +572,24 @@ void __init pnv_pci_init(void)
init_pci_config_tokens();
find_and_init_phbs();
#endif /* CONFIG_PPC_POWERNV_RTAS */
- } else {
- /* OPAL is here, do our normal stuff */
+ }
+ /* OPAL is here, do our normal stuff */
+ else {
+ int found_ioda = 0;
+
+ /* Look for IODA IO-Hubs. We don't support mixing IODA
+ * and p5ioc2 due to the need to change some global
+ * probing flags
+ */
+ for_each_compatible_node(np, NULL, "ibm,ioda-hub") {
+ pnv_pci_init_ioda_hub(np);
+ found_ioda = 1;
+ }
/* Look for p5ioc2 IO-Hubs */
- for_each_compatible_node(np, NULL, "ibm,p5ioc2")
- pnv_pci_init_p5ioc2_hub(np);
+ if (!found_ioda)
+ for_each_compatible_node(np, NULL, "ibm,p5ioc2")
+ pnv_pci_init_p5ioc2_hub(np);
}
/* Setup the linkage between OF nodes and PHBs */
diff --git a/arch/powerpc/platforms/powernv/pci.h b/arch/powerpc/platforms/powernv/pci.h
index d4dbc4950936..8bc479634643 100644
--- a/arch/powerpc/platforms/powernv/pci.h
+++ b/arch/powerpc/platforms/powernv/pci.h
@@ -9,9 +9,63 @@ enum pnv_phb_type {
PNV_PHB_IODA2,
};
+/* Precise PHB model for error management */
+enum pnv_phb_model {
+ PNV_PHB_MODEL_UNKNOWN,
+ PNV_PHB_MODEL_P5IOC2,
+ PNV_PHB_MODEL_P7IOC,
+};
+
+#define PNV_PCI_DIAG_BUF_SIZE 4096
+
+/* Data associated with a PE, including IOMMU tracking etc.. */
+struct pnv_ioda_pe {
+ /* A PE can be associated with a single device or an
+ * entire bus (& children). In the former case, pdev
+ * is populated, in the later case, pbus is.
+ */
+ struct pci_dev *pdev;
+ struct pci_bus *pbus;
+
+ /* Effective RID (device RID for a device PE and base bus
+ * RID with devfn 0 for a bus PE)
+ */
+ unsigned int rid;
+
+ /* PE number */
+ unsigned int pe_number;
+
+ /* "Weight" assigned to the PE for the sake of DMA resource
+ * allocations
+ */
+ unsigned int dma_weight;
+
+ /* This is a PCI-E -> PCI-X bridge, this points to the
+ * corresponding bus PE
+ */
+ struct pnv_ioda_pe *bus_pe;
+
+ /* "Base" iommu table, ie, 4K TCEs, 32-bit DMA */
+ int tce32_seg;
+ int tce32_segcount;
+ struct iommu_table tce32_table;
+
+ /* XXX TODO: Add support for additional 64-bit iommus */
+
+ /* MSIs. MVE index is identical for for 32 and 64 bit MSI
+ * and -1 if not supported. (It's actually identical to the
+ * PE number)
+ */
+ int mve_number;
+
+ /* Link in list of PE#s */
+ struct list_head link;
+};
+
struct pnv_phb {
struct pci_controller *hose;
enum pnv_phb_type type;
+ enum pnv_phb_model model;
u64 opal_id;
void __iomem *regs;
spinlock_t lock;
@@ -34,7 +88,52 @@ struct pnv_phb {
struct {
struct iommu_table iommu_table;
} p5ioc2;
+
+ struct {
+ /* Global bridge info */
+ unsigned int total_pe;
+ unsigned int m32_size;
+ unsigned int m32_segsize;
+ unsigned int m32_pci_base;
+ unsigned int io_size;
+ unsigned int io_segsize;
+ unsigned int io_pci_base;
+
+ /* PE allocation bitmap */
+ unsigned long *pe_alloc;
+
+ /* M32 & IO segment maps */
+ unsigned int *m32_segmap;
+ unsigned int *io_segmap;
+ struct pnv_ioda_pe *pe_array;
+
+ /* Reverse map of PEs, will have to extend if
+ * we are to support more than 256 PEs, indexed
+ * bus { bus, devfn }
+ */
+ unsigned char pe_rmap[0x10000];
+
+ /* 32-bit TCE tables allocation */
+ unsigned long tce32_count;
+
+ /* Total "weight" for the sake of DMA resources
+ * allocation
+ */
+ unsigned int dma_weight;
+ unsigned int dma_pe_count;
+
+ /* Sorted list of used PE's, sorted at
+ * boot for resource allocation purposes
+ */
+ struct list_head pe_list;
+ } ioda;
};
+
+ /* PHB status structure */
+ union {
+ unsigned char blob[PNV_PCI_DIAG_BUF_SIZE];
+ struct OpalIoP7IOCPhbErrorData p7ioc;
+ } diag;
};
extern struct pci_ops pnv_pci_ops;
@@ -43,6 +142,7 @@ extern void pnv_pci_setup_iommu_table(struct iommu_table *tbl,
void *tce_mem, u64 tce_size,
u64 dma_offset);
extern void pnv_pci_init_p5ioc2_hub(struct device_node *np);
+extern void pnv_pci_init_ioda_hub(struct device_node *np);
#endif /* __POWERNV_PCI_H */
diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c
index e87736685243..17210c526c52 100644
--- a/arch/powerpc/platforms/powernv/smp.c
+++ b/arch/powerpc/platforms/powernv/smp.c
@@ -75,7 +75,7 @@ int __devinit pnv_smp_kick_cpu(int nr)
/* On OPAL v2 the CPU are still spinning inside OPAL itself,
* get them back now
*/
- if (firmware_has_feature(FW_FEATURE_OPALv2)) {
+ if (!paca[nr].cpu_start && firmware_has_feature(FW_FEATURE_OPALv2)) {
pr_devel("OPAL: Starting CPU %d (HW 0x%x)...\n", nr, pcpu);
rc = opal_start_cpu(pcpu, start_here);
if (rc != OPAL_SUCCESS)
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-02 06:32:17 +0300