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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /ANDROID_3.4.5/arch/powerpc/platforms/powernv/pci.c | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'ANDROID_3.4.5/arch/powerpc/platforms/powernv/pci.c')
-rw-r--r-- | ANDROID_3.4.5/arch/powerpc/platforms/powernv/pci.c | 609 |
1 files changed, 0 insertions, 609 deletions
diff --git a/ANDROID_3.4.5/arch/powerpc/platforms/powernv/pci.c b/ANDROID_3.4.5/arch/powerpc/platforms/powernv/pci.c deleted file mode 100644 index be3cfc5c..00000000 --- a/ANDROID_3.4.5/arch/powerpc/platforms/powernv/pci.c +++ /dev/null @@ -1,609 +0,0 @@ -/* - * Support PCI/PCIe on PowerNV platforms - * - * Currently supports only P5IOC2 - * - * 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. - */ - -#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 <asm/firmware.h> - -#include "powernv.h" -#include "pci.h" - -/* Delay in usec */ -#define PCI_RESET_DELAY_US 3000000 - -#define cfg_dbg(fmt...) do { } while(0) -//#define cfg_dbg(fmt...) printk(fmt) - -#ifdef CONFIG_PCI_MSI -static int pnv_msi_check_device(struct pci_dev* pdev, int nvec, int type) -{ - struct pci_controller *hose = pci_bus_to_host(pdev->bus); - struct pnv_phb *phb = hose->private_data; - - return (phb && phb->msi_map) ? 0 : -ENODEV; -} - -static unsigned int pnv_get_one_msi(struct pnv_phb *phb) -{ - unsigned long flags; - unsigned int id, rc; - - spin_lock_irqsave(&phb->lock, flags); - - 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) { - rc = 0; - goto out; - } - __set_bit(id, phb->msi_map); - 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_irqsave(&phb->lock, flags); - __clear_bit(id, phb->msi_map); - spin_unlock_irqrestore(&phb->lock, flags); -} - -static int pnv_setup_msi_irqs(struct pci_dev *pdev, int nvec, int type) -{ - struct pci_controller *hose = pci_bus_to_host(pdev->bus); - struct pnv_phb *phb = hose->private_data; - struct msi_desc *entry; - struct msi_msg msg; - unsigned int hwirq, virq; - int rc; - - if (WARN_ON(!phb)) - return -ENODEV; - - list_for_each_entry(entry, &pdev->msi_list, list) { - if (!entry->msi_attrib.is_64 && !phb->msi32_support) { - pr_warn("%s: Supports only 64-bit MSIs\n", - pci_name(pdev)); - return -ENXIO; - } - hwirq = pnv_get_one_msi(phb); - if (!hwirq) { - pr_warn("%s: Failed to find a free MSI\n", - pci_name(pdev)); - return -ENOSPC; - } - virq = irq_create_mapping(NULL, hwirq); - if (virq == NO_IRQ) { - pr_warn("%s: Failed to map MSI to linux irq\n", - pci_name(pdev)); - pnv_put_msi(phb, hwirq); - return -ENOMEM; - } - rc = phb->msi_setup(phb, pdev, hwirq, entry->msi_attrib.is_64, - &msg); - if (rc) { - pr_warn("%s: Failed to setup MSI\n", pci_name(pdev)); - irq_dispose_mapping(virq); - pnv_put_msi(phb, hwirq); - return rc; - } - irq_set_msi_desc(virq, entry); - write_msi_msg(virq, &msg); - } - return 0; -} - -static void pnv_teardown_msi_irqs(struct pci_dev *pdev) -{ - struct pci_controller *hose = pci_bus_to_host(pdev->bus); - struct pnv_phb *phb = hose->private_data; - struct msi_desc *entry; - - if (WARN_ON(!phb)) - return; - - list_for_each_entry(entry, &pdev->msi_list, list) { - if (entry->irq == NO_IRQ) - continue; - irq_set_msi_desc(entry->irq, NULL); - pnv_put_msi(phb, virq_to_hw(entry->irq)); - irq_dispose_mapping(entry->irq); - } -} -#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) -{ - s64 rc; - u8 fstate; - u16 pcierr; - u32 pe_no; - - /* Get PE# if we support IODA */ - pe_no = phb->bdfn_to_pe ? phb->bdfn_to_pe(phb, bus, bdfn & 0xff) : 0; - - /* Read freeze status */ - rc = opal_pci_eeh_freeze_status(phb->opal_id, pe_no, &fstate, &pcierr, - NULL); - if (rc) { - pr_warning("PCI %d: Failed to read EEH status for PE#%d," - " err %lld\n", phb->hose->global_number, pe_no, rc); - return; - } - cfg_dbg(" -> EEH check, bdfn=%04x PE%d fstate=%x\n", - bdfn, pe_no, fstate); - if (fstate != 0) - pnv_pci_handle_eeh_config(phb, pe_no); -} - -static int pnv_pci_read_config(struct pci_bus *bus, - unsigned int devfn, - int where, int size, u32 *val) -{ - struct pci_controller *hose = pci_bus_to_host(bus); - struct pnv_phb *phb = hose->private_data; - u32 bdfn = (((uint64_t)bus->number) << 8) | devfn; - s64 rc; - - if (hose == NULL) - return PCIBIOS_DEVICE_NOT_FOUND; - - switch (size) { - case 1: { - u8 v8; - rc = opal_pci_config_read_byte(phb->opal_id, bdfn, where, &v8); - *val = (rc == OPAL_SUCCESS) ? v8 : 0xff; - break; - } - case 2: { - u16 v16; - rc = opal_pci_config_read_half_word(phb->opal_id, bdfn, where, - &v16); - *val = (rc == OPAL_SUCCESS) ? v16 : 0xffff; - break; - } - case 4: { - u32 v32; - rc = opal_pci_config_read_word(phb->opal_id, bdfn, where, &v32); - *val = (rc == OPAL_SUCCESS) ? v32 : 0xffffffff; - break; - } - default: - return PCIBIOS_FUNC_NOT_SUPPORTED; - } - cfg_dbg("pnv_pci_read_config bus: %x devfn: %x +%x/%x -> %08x\n", - bus->number, devfn, where, size, *val); - - /* Check if the PHB got frozen due to an error (no response) */ - pnv_pci_config_check_eeh(phb, bus, bdfn); - - return PCIBIOS_SUCCESSFUL; -} - -static int pnv_pci_write_config(struct pci_bus *bus, - unsigned int devfn, - int where, int size, u32 val) -{ - struct pci_controller *hose = pci_bus_to_host(bus); - struct pnv_phb *phb = hose->private_data; - u32 bdfn = (((uint64_t)bus->number) << 8) | devfn; - - if (hose == NULL) - return PCIBIOS_DEVICE_NOT_FOUND; - - cfg_dbg("pnv_pci_write_config bus: %x devfn: %x +%x/%x -> %08x\n", - bus->number, devfn, where, size, val); - switch (size) { - case 1: - opal_pci_config_write_byte(phb->opal_id, bdfn, where, val); - break; - case 2: - opal_pci_config_write_half_word(phb->opal_id, bdfn, where, val); - break; - case 4: - opal_pci_config_write_word(phb->opal_id, bdfn, where, val); - break; - default: - return PCIBIOS_FUNC_NOT_SUPPORTED; - } - /* Check if the PHB got frozen due to an error (no response) */ - pnv_pci_config_check_eeh(phb, bus, bdfn); - - return PCIBIOS_SUCCESSFUL; -} - -struct pci_ops pnv_pci_ops = { - .read = pnv_pci_read_config, - .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, *tces; - u64 rpn; - - proto_tce = TCE_PCI_READ; // Read allowed - - if (direction != DMA_TO_DEVICE) - proto_tce |= TCE_PCI_WRITE; - - tces = tcep = ((u64 *)tbl->it_base) + index - tbl->it_offset; - rpn = __pa(uaddr) >> TCE_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); - - return 0; -} - -static void pnv_tce_free(struct iommu_table *tbl, long index, long npages) -{ - 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, - void *tce_mem, u64 tce_size, - u64 dma_offset) -{ - tbl->it_blocksize = 16; - tbl->it_base = (unsigned long)tce_mem; - tbl->it_offset = dma_offset >> IOMMU_PAGE_SHIFT; - tbl->it_index = 0; - tbl->it_size = tce_size >> 3; - tbl->it_busno = 0; - tbl->it_type = TCE_PCI; -} - -static struct iommu_table * __devinit -pnv_pci_setup_bml_iommu(struct pci_controller *hose) -{ - struct iommu_table *tbl; - 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); - return NULL; - } - tbl = kzalloc_node(sizeof(struct iommu_table), GFP_KERNEL, hose->node); - if (WARN_ON(!tbl)) - return NULL; - 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; -} - -static void __devinit pnv_pci_dma_fallback_setup(struct pci_controller *hose, - struct pci_dev *pdev) -{ - struct device_node *np = pci_bus_to_OF_node(hose->bus); - struct pci_dn *pdn; - - if (np == NULL) - return; - pdn = PCI_DN(np); - if (!pdn->iommu_table) - pdn->iommu_table = pnv_pci_setup_bml_iommu(hose); - if (!pdn->iommu_table) - return; - set_iommu_table_base(&pdev->dev, pdn->iommu_table); -} - -static void __devinit pnv_pci_dma_dev_setup(struct pci_dev *pdev) -{ - struct pci_controller *hose = pci_bus_to_host(pdev->bus); - struct pnv_phb *phb = hose->private_data; - - /* If we have no phb structure, try to setup a fallback based on - * the device-tree (RTAS PCI for example) - */ - if (phb && phb->dma_dev_setup) - phb->dma_dev_setup(phb, pdev); - else - 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); - const __be64 *tstamp; - u64 now, target; - - - /* We hijack this as a way to ensure we have waited long - * enough since the reset was lifted on the PCI bus - */ - if (bus != hose->bus) - return PCI_PROBE_NORMAL; - tstamp = of_get_property(hose->dn, "reset-clear-timestamp", NULL); - if (!tstamp || !*tstamp) - return PCI_PROBE_NORMAL; - - now = mftb() / tb_ticks_per_usec; - target = (be64_to_cpup(tstamp) / tb_ticks_per_usec) - + PCI_RESET_DELAY_US; - - pr_devel("pci %04d: Reset target: 0x%llx now: 0x%llx\n", - hose->global_number, target, now); - - if (now < target) - msleep((target - now + 999) / 1000); - - return PCI_PROBE_NORMAL; -} - -void __init pnv_pci_init(void) -{ - struct device_node *np; - - pci_add_flags(PCI_CAN_SKIP_ISA_ALIGN); - - /* OPAL absent, try POPAL first then RTAS detection of PHBs */ - if (!firmware_has_feature(FW_FEATURE_OPAL)) { -#ifdef CONFIG_PPC_POWERNV_RTAS - init_pci_config_tokens(); - find_and_init_phbs(); -#endif /* CONFIG_PPC_POWERNV_RTAS */ - } - /* 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 */ - 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 */ - pci_devs_phb_init(); - - /* Configure IOMMU DMA hooks */ - ppc_md.pci_dma_dev_setup = pnv_pci_dma_dev_setup; - ppc_md.tce_build = pnv_tce_build; - ppc_md.tce_free = pnv_tce_free; - ppc_md.pci_probe_mode = pnv_pci_probe_mode; - set_pci_dma_ops(&dma_iommu_ops); - - /* Configure MSIs */ -#ifdef CONFIG_PCI_MSI - ppc_md.msi_check_device = pnv_msi_check_device; - ppc_md.setup_msi_irqs = pnv_setup_msi_irqs; - ppc_md.teardown_msi_irqs = pnv_teardown_msi_irqs; -#endif -} |