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Diffstat (limited to 'arch/powerpc/platforms/pseries/pci.c')
-rw-r--r--arch/powerpc/platforms/pseries/pci.c345
1 files changed, 345 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/pseries/pci.c b/arch/powerpc/platforms/pseries/pci.c
new file mode 100644
index 000000000..eab96637d
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/pci.c
@@ -0,0 +1,345 @@
+/*
+ * Copyright (C) 2001 Dave Engebretsen, IBM Corporation
+ * Copyright (C) 2003 Anton Blanchard <anton@au.ibm.com>, IBM
+ *
+ * pSeries specific routines for PCI.
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/init.h>
+#include <linux/ioport.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+
+#include <asm/eeh.h>
+#include <asm/pci-bridge.h>
+#include <asm/prom.h>
+#include <asm/ppc-pci.h>
+#include "pseries.h"
+
+#if 0
+void pcibios_name_device(struct pci_dev *dev)
+{
+ struct device_node *dn;
+
+ /*
+ * Add IBM loc code (slot) as a prefix to the device names for service
+ */
+ dn = pci_device_to_OF_node(dev);
+ if (dn) {
+ const char *loc_code = of_get_property(dn, "ibm,loc-code",
+ NULL);
+ if (loc_code) {
+ int loc_len = strlen(loc_code);
+ if (loc_len < sizeof(dev->dev.name)) {
+ memmove(dev->dev.name+loc_len+1, dev->dev.name,
+ sizeof(dev->dev.name)-loc_len-1);
+ memcpy(dev->dev.name, loc_code, loc_len);
+ dev->dev.name[loc_len] = ' ';
+ dev->dev.name[sizeof(dev->dev.name)-1] = '\0';
+ }
+ }
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_ANY_ID, PCI_ANY_ID, pcibios_name_device);
+#endif
+
+#ifdef CONFIG_PCI_IOV
+#define MAX_VFS_FOR_MAP_PE 256
+struct pe_map_bar_entry {
+ __be64 bar; /* Input: Virtual Function BAR */
+ __be16 rid; /* Input: Virtual Function Router ID */
+ __be16 pe_num; /* Output: Virtual Function PE Number */
+ __be32 reserved; /* Reserved Space */
+};
+
+int pseries_send_map_pe(struct pci_dev *pdev,
+ u16 num_vfs,
+ struct pe_map_bar_entry *vf_pe_array)
+{
+ struct pci_dn *pdn;
+ int rc;
+ unsigned long buid, addr;
+ int ibm_map_pes = rtas_token("ibm,open-sriov-map-pe-number");
+
+ if (ibm_map_pes == RTAS_UNKNOWN_SERVICE)
+ return -EINVAL;
+
+ pdn = pci_get_pdn(pdev);
+ addr = rtas_config_addr(pdn->busno, pdn->devfn, 0);
+ buid = pdn->phb->buid;
+ spin_lock(&rtas_data_buf_lock);
+ memcpy(rtas_data_buf, vf_pe_array,
+ RTAS_DATA_BUF_SIZE);
+ rc = rtas_call(ibm_map_pes, 5, 1, NULL, addr,
+ BUID_HI(buid), BUID_LO(buid),
+ rtas_data_buf,
+ num_vfs * sizeof(struct pe_map_bar_entry));
+ memcpy(vf_pe_array, rtas_data_buf, RTAS_DATA_BUF_SIZE);
+ spin_unlock(&rtas_data_buf_lock);
+
+ if (rc)
+ dev_err(&pdev->dev,
+ "%s: Failed to associate pes PE#%lx, rc=%x\n",
+ __func__, addr, rc);
+
+ return rc;
+}
+
+void pseries_set_pe_num(struct pci_dev *pdev, u16 vf_index, __be16 pe_num)
+{
+ struct pci_dn *pdn;
+
+ pdn = pci_get_pdn(pdev);
+ pdn->pe_num_map[vf_index] = be16_to_cpu(pe_num);
+ dev_dbg(&pdev->dev, "VF %04x:%02x:%02x.%x associated with PE#%x\n",
+ pci_domain_nr(pdev->bus),
+ pdev->bus->number,
+ PCI_SLOT(pci_iov_virtfn_devfn(pdev, vf_index)),
+ PCI_FUNC(pci_iov_virtfn_devfn(pdev, vf_index)),
+ pdn->pe_num_map[vf_index]);
+}
+
+int pseries_associate_pes(struct pci_dev *pdev, u16 num_vfs)
+{
+ struct pci_dn *pdn;
+ int i, rc, vf_index;
+ struct pe_map_bar_entry *vf_pe_array;
+ struct resource *res;
+ u64 size;
+
+ vf_pe_array = kzalloc(RTAS_DATA_BUF_SIZE, GFP_KERNEL);
+ if (!vf_pe_array)
+ return -ENOMEM;
+
+ pdn = pci_get_pdn(pdev);
+ /* create firmware structure to associate pes */
+ for (vf_index = 0; vf_index < num_vfs; vf_index++) {
+ pdn->pe_num_map[vf_index] = IODA_INVALID_PE;
+ for (i = 0; i < PCI_SRIOV_NUM_BARS; i++) {
+ res = &pdev->resource[i + PCI_IOV_RESOURCES];
+ if (!res->parent)
+ continue;
+ size = pcibios_iov_resource_alignment(pdev, i +
+ PCI_IOV_RESOURCES);
+ vf_pe_array[vf_index].bar =
+ cpu_to_be64(res->start + size * vf_index);
+ vf_pe_array[vf_index].rid =
+ cpu_to_be16((pci_iov_virtfn_bus(pdev, vf_index)
+ << 8) | pci_iov_virtfn_devfn(pdev,
+ vf_index));
+ vf_pe_array[vf_index].pe_num =
+ cpu_to_be16(IODA_INVALID_PE);
+ }
+ }
+
+ rc = pseries_send_map_pe(pdev, num_vfs, vf_pe_array);
+ /* Only zero is success */
+ if (!rc)
+ for (vf_index = 0; vf_index < num_vfs; vf_index++)
+ pseries_set_pe_num(pdev, vf_index,
+ vf_pe_array[vf_index].pe_num);
+
+ kfree(vf_pe_array);
+ return rc;
+}
+
+int pseries_pci_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
+{
+ struct pci_dn *pdn;
+ int rc;
+ const int *max_vfs;
+ int max_config_vfs;
+ struct device_node *dn = pci_device_to_OF_node(pdev);
+
+ max_vfs = of_get_property(dn, "ibm,number-of-configurable-vfs", NULL);
+
+ if (!max_vfs)
+ return -EINVAL;
+
+ /* First integer stores max config */
+ max_config_vfs = of_read_number(&max_vfs[0], 1);
+ if (max_config_vfs < num_vfs && num_vfs > MAX_VFS_FOR_MAP_PE) {
+ dev_err(&pdev->dev,
+ "Num VFs %x > %x Configurable VFs\n",
+ num_vfs, (num_vfs > MAX_VFS_FOR_MAP_PE) ?
+ MAX_VFS_FOR_MAP_PE : max_config_vfs);
+ return -EINVAL;
+ }
+
+ pdn = pci_get_pdn(pdev);
+ pdn->pe_num_map = kmalloc_array(num_vfs,
+ sizeof(*pdn->pe_num_map),
+ GFP_KERNEL);
+ if (!pdn->pe_num_map)
+ return -ENOMEM;
+
+ rc = pseries_associate_pes(pdev, num_vfs);
+
+ /* Anything other than zero is failure */
+ if (rc) {
+ dev_err(&pdev->dev, "Failure to enable sriov: %x\n", rc);
+ kfree(pdn->pe_num_map);
+ } else {
+ pci_vf_drivers_autoprobe(pdev, false);
+ }
+
+ return rc;
+}
+
+int pseries_pcibios_sriov_enable(struct pci_dev *pdev, u16 num_vfs)
+{
+ /* Allocate PCI data */
+ add_dev_pci_data(pdev);
+ return pseries_pci_sriov_enable(pdev, num_vfs);
+}
+
+int pseries_pcibios_sriov_disable(struct pci_dev *pdev)
+{
+ struct pci_dn *pdn;
+
+ pdn = pci_get_pdn(pdev);
+ /* Releasing pe_num_map */
+ kfree(pdn->pe_num_map);
+ /* Release PCI data */
+ remove_dev_pci_data(pdev);
+ pci_vf_drivers_autoprobe(pdev, true);
+ return 0;
+}
+#endif
+
+static void __init pSeries_request_regions(void)
+{
+ if (!isa_io_base)
+ return;
+
+ request_region(0x20,0x20,"pic1");
+ request_region(0xa0,0x20,"pic2");
+ request_region(0x00,0x20,"dma1");
+ request_region(0x40,0x20,"timer");
+ request_region(0x80,0x10,"dma page reg");
+ request_region(0xc0,0x20,"dma2");
+}
+
+void __init pSeries_final_fixup(void)
+{
+ pSeries_request_regions();
+
+ eeh_addr_cache_build();
+
+#ifdef CONFIG_PCI_IOV
+ ppc_md.pcibios_sriov_enable = pseries_pcibios_sriov_enable;
+ ppc_md.pcibios_sriov_disable = pseries_pcibios_sriov_disable;
+#endif
+}
+
+/*
+ * Assume the winbond 82c105 is the IDE controller on a
+ * p610/p615/p630. We should probably be more careful in case
+ * someone tries to plug in a similar adapter.
+ */
+static void fixup_winbond_82c105(struct pci_dev* dev)
+{
+ int i;
+ unsigned int reg;
+
+ if (!machine_is(pseries))
+ return;
+
+ printk("Using INTC for W82c105 IDE controller.\n");
+ pci_read_config_dword(dev, 0x40, &reg);
+ /* Enable LEGIRQ to use INTC instead of ISA interrupts */
+ pci_write_config_dword(dev, 0x40, reg | (1<<11));
+
+ for (i = 0; i < DEVICE_COUNT_RESOURCE; ++i) {
+ /* zap the 2nd function of the winbond chip */
+ if (dev->resource[i].flags & IORESOURCE_IO
+ && dev->bus->number == 0 && dev->devfn == 0x81)
+ dev->resource[i].flags &= ~IORESOURCE_IO;
+ if (dev->resource[i].start == 0 && dev->resource[i].end) {
+ dev->resource[i].flags = 0;
+ dev->resource[i].end = 0;
+ }
+ }
+}
+DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_WINBOND, PCI_DEVICE_ID_WINBOND_82C105,
+ fixup_winbond_82c105);
+
+int pseries_root_bridge_prepare(struct pci_host_bridge *bridge)
+{
+ struct device_node *dn, *pdn;
+ struct pci_bus *bus;
+ u32 pcie_link_speed_stats[2];
+ int rc;
+
+ bus = bridge->bus;
+
+ /* Rely on the pcibios_free_controller_deferred() callback. */
+ pci_set_host_bridge_release(bridge, pcibios_free_controller_deferred,
+ (void *) pci_bus_to_host(bus));
+
+ dn = pcibios_get_phb_of_node(bus);
+ if (!dn)
+ return 0;
+
+ for (pdn = dn; pdn != NULL; pdn = of_get_next_parent(pdn)) {
+ rc = of_property_read_u32_array(pdn,
+ "ibm,pcie-link-speed-stats",
+ &pcie_link_speed_stats[0], 2);
+ if (!rc)
+ break;
+ }
+
+ of_node_put(pdn);
+
+ if (rc) {
+ pr_debug("no ibm,pcie-link-speed-stats property\n");
+ return 0;
+ }
+
+ switch (pcie_link_speed_stats[0]) {
+ case 0x01:
+ bus->max_bus_speed = PCIE_SPEED_2_5GT;
+ break;
+ case 0x02:
+ bus->max_bus_speed = PCIE_SPEED_5_0GT;
+ break;
+ case 0x04:
+ bus->max_bus_speed = PCIE_SPEED_8_0GT;
+ break;
+ default:
+ bus->max_bus_speed = PCI_SPEED_UNKNOWN;
+ break;
+ }
+
+ switch (pcie_link_speed_stats[1]) {
+ case 0x01:
+ bus->cur_bus_speed = PCIE_SPEED_2_5GT;
+ break;
+ case 0x02:
+ bus->cur_bus_speed = PCIE_SPEED_5_0GT;
+ break;
+ case 0x04:
+ bus->cur_bus_speed = PCIE_SPEED_8_0GT;
+ break;
+ default:
+ bus->cur_bus_speed = PCI_SPEED_UNKNOWN;
+ break;
+ }
+
+ return 0;
+}
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