+++ /dev/null
-/* pci_fire.c: Sun4u platform PCI-E controller support.
- *
- * Copyright (C) 2007 David S. Miller (davem@davemloft.net)
- */
-#include <linux/kernel.h>
-#include <linux/pci.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/msi.h>
-#include <linux/irq.h>
-#include <linux/of_device.h>
-
-#include <asm/prom.h>
-#include <asm/irq.h>
-#include <asm/upa.h>
-
-#include "pci_impl.h"
-
-#define DRIVER_NAME "fire"
-#define PFX DRIVER_NAME ": "
-
-#define FIRE_IOMMU_CONTROL 0x40000UL
-#define FIRE_IOMMU_TSBBASE 0x40008UL
-#define FIRE_IOMMU_FLUSH 0x40100UL
-#define FIRE_IOMMU_FLUSHINV 0x40108UL
-
-static int pci_fire_pbm_iommu_init(struct pci_pbm_info *pbm)
-{
- struct iommu *iommu = pbm->iommu;
- u32 vdma[2], dma_mask;
- u64 control;
- int tsbsize, err;
-
- /* No virtual-dma property on these guys, use largest size. */
- vdma[0] = 0xc0000000; /* base */
- vdma[1] = 0x40000000; /* size */
- dma_mask = 0xffffffff;
- tsbsize = 128;
-
- /* Register addresses. */
- iommu->iommu_control = pbm->pbm_regs + FIRE_IOMMU_CONTROL;
- iommu->iommu_tsbbase = pbm->pbm_regs + FIRE_IOMMU_TSBBASE;
- iommu->iommu_flush = pbm->pbm_regs + FIRE_IOMMU_FLUSH;
- iommu->iommu_flushinv = pbm->pbm_regs + FIRE_IOMMU_FLUSHINV;
-
- /* We use the main control/status register of FIRE as the write
- * completion register.
- */
- iommu->write_complete_reg = pbm->controller_regs + 0x410000UL;
-
- /*
- * Invalidate TLB Entries.
- */
- upa_writeq(~(u64)0, iommu->iommu_flushinv);
-
- err = iommu_table_init(iommu, tsbsize * 8 * 1024, vdma[0], dma_mask,
- pbm->numa_node);
- if (err)
- return err;
-
- upa_writeq(__pa(iommu->page_table) | 0x7UL, iommu->iommu_tsbbase);
-
- control = upa_readq(iommu->iommu_control);
- control |= (0x00000400 /* TSB cache snoop enable */ |
- 0x00000300 /* Cache mode */ |
- 0x00000002 /* Bypass enable */ |
- 0x00000001 /* Translation enable */);
- upa_writeq(control, iommu->iommu_control);
-
- return 0;
-}
-
-#ifdef CONFIG_PCI_MSI
-struct pci_msiq_entry {
- u64 word0;
-#define MSIQ_WORD0_RESV 0x8000000000000000UL
-#define MSIQ_WORD0_FMT_TYPE 0x7f00000000000000UL
-#define MSIQ_WORD0_FMT_TYPE_SHIFT 56
-#define MSIQ_WORD0_LEN 0x00ffc00000000000UL
-#define MSIQ_WORD0_LEN_SHIFT 46
-#define MSIQ_WORD0_ADDR0 0x00003fff00000000UL
-#define MSIQ_WORD0_ADDR0_SHIFT 32
-#define MSIQ_WORD0_RID 0x00000000ffff0000UL
-#define MSIQ_WORD0_RID_SHIFT 16
-#define MSIQ_WORD0_DATA0 0x000000000000ffffUL
-#define MSIQ_WORD0_DATA0_SHIFT 0
-
-#define MSIQ_TYPE_MSG 0x6
-#define MSIQ_TYPE_MSI32 0xb
-#define MSIQ_TYPE_MSI64 0xf
-
- u64 word1;
-#define MSIQ_WORD1_ADDR1 0xffffffffffff0000UL
-#define MSIQ_WORD1_ADDR1_SHIFT 16
-#define MSIQ_WORD1_DATA1 0x000000000000ffffUL
-#define MSIQ_WORD1_DATA1_SHIFT 0
-
- u64 resv[6];
-};
-
-/* All MSI registers are offset from pbm->pbm_regs */
-#define EVENT_QUEUE_BASE_ADDR_REG 0x010000UL
-#define EVENT_QUEUE_BASE_ADDR_ALL_ONES 0xfffc000000000000UL
-
-#define EVENT_QUEUE_CONTROL_SET(EQ) (0x011000UL + (EQ) * 0x8UL)
-#define EVENT_QUEUE_CONTROL_SET_OFLOW 0x0200000000000000UL
-#define EVENT_QUEUE_CONTROL_SET_EN 0x0000100000000000UL
-
-#define EVENT_QUEUE_CONTROL_CLEAR(EQ) (0x011200UL + (EQ) * 0x8UL)
-#define EVENT_QUEUE_CONTROL_CLEAR_OF 0x0200000000000000UL
-#define EVENT_QUEUE_CONTROL_CLEAR_E2I 0x0000800000000000UL
-#define EVENT_QUEUE_CONTROL_CLEAR_DIS 0x0000100000000000UL
-
-#define EVENT_QUEUE_STATE(EQ) (0x011400UL + (EQ) * 0x8UL)
-#define EVENT_QUEUE_STATE_MASK 0x0000000000000007UL
-#define EVENT_QUEUE_STATE_IDLE 0x0000000000000001UL
-#define EVENT_QUEUE_STATE_ACTIVE 0x0000000000000002UL
-#define EVENT_QUEUE_STATE_ERROR 0x0000000000000004UL
-
-#define EVENT_QUEUE_TAIL(EQ) (0x011600UL + (EQ) * 0x8UL)
-#define EVENT_QUEUE_TAIL_OFLOW 0x0200000000000000UL
-#define EVENT_QUEUE_TAIL_VAL 0x000000000000007fUL
-
-#define EVENT_QUEUE_HEAD(EQ) (0x011800UL + (EQ) * 0x8UL)
-#define EVENT_QUEUE_HEAD_VAL 0x000000000000007fUL
-
-#define MSI_MAP(MSI) (0x020000UL + (MSI) * 0x8UL)
-#define MSI_MAP_VALID 0x8000000000000000UL
-#define MSI_MAP_EQWR_N 0x4000000000000000UL
-#define MSI_MAP_EQNUM 0x000000000000003fUL
-
-#define MSI_CLEAR(MSI) (0x028000UL + (MSI) * 0x8UL)
-#define MSI_CLEAR_EQWR_N 0x4000000000000000UL
-
-#define IMONDO_DATA0 0x02C000UL
-#define IMONDO_DATA0_DATA 0xffffffffffffffc0UL
-
-#define IMONDO_DATA1 0x02C008UL
-#define IMONDO_DATA1_DATA 0xffffffffffffffffUL
-
-#define MSI_32BIT_ADDR 0x034000UL
-#define MSI_32BIT_ADDR_VAL 0x00000000ffff0000UL
-
-#define MSI_64BIT_ADDR 0x034008UL
-#define MSI_64BIT_ADDR_VAL 0xffffffffffff0000UL
-
-static int pci_fire_get_head(struct pci_pbm_info *pbm, unsigned long msiqid,
- unsigned long *head)
-{
- *head = upa_readq(pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid));
- return 0;
-}
-
-static int pci_fire_dequeue_msi(struct pci_pbm_info *pbm, unsigned long msiqid,
- unsigned long *head, unsigned long *msi)
-{
- unsigned long type_fmt, type, msi_num;
- struct pci_msiq_entry *base, *ep;
-
- base = (pbm->msi_queues + ((msiqid - pbm->msiq_first) * 8192));
- ep = &base[*head];
-
- if ((ep->word0 & MSIQ_WORD0_FMT_TYPE) == 0)
- return 0;
-
- type_fmt = ((ep->word0 & MSIQ_WORD0_FMT_TYPE) >>
- MSIQ_WORD0_FMT_TYPE_SHIFT);
- type = (type_fmt >> 3);
- if (unlikely(type != MSIQ_TYPE_MSI32 &&
- type != MSIQ_TYPE_MSI64))
- return -EINVAL;
-
- *msi = msi_num = ((ep->word0 & MSIQ_WORD0_DATA0) >>
- MSIQ_WORD0_DATA0_SHIFT);
-
- upa_writeq(MSI_CLEAR_EQWR_N, pbm->pbm_regs + MSI_CLEAR(msi_num));
-
- /* Clear the entry. */
- ep->word0 &= ~MSIQ_WORD0_FMT_TYPE;
-
- /* Go to next entry in ring. */
- (*head)++;
- if (*head >= pbm->msiq_ent_count)
- *head = 0;
-
- return 1;
-}
-
-static int pci_fire_set_head(struct pci_pbm_info *pbm, unsigned long msiqid,
- unsigned long head)
-{
- upa_writeq(head, pbm->pbm_regs + EVENT_QUEUE_HEAD(msiqid));
- return 0;
-}
-
-static int pci_fire_msi_setup(struct pci_pbm_info *pbm, unsigned long msiqid,
- unsigned long msi, int is_msi64)
-{
- u64 val;
-
- val = upa_readq(pbm->pbm_regs + MSI_MAP(msi));
- val &= ~(MSI_MAP_EQNUM);
- val |= msiqid;
- upa_writeq(val, pbm->pbm_regs + MSI_MAP(msi));
-
- upa_writeq(MSI_CLEAR_EQWR_N, pbm->pbm_regs + MSI_CLEAR(msi));
-
- val = upa_readq(pbm->pbm_regs + MSI_MAP(msi));
- val |= MSI_MAP_VALID;
- upa_writeq(val, pbm->pbm_regs + MSI_MAP(msi));
-
- return 0;
-}
-
-static int pci_fire_msi_teardown(struct pci_pbm_info *pbm, unsigned long msi)
-{
- unsigned long msiqid;
- u64 val;
-
- val = upa_readq(pbm->pbm_regs + MSI_MAP(msi));
- msiqid = (val & MSI_MAP_EQNUM);
-
- val &= ~MSI_MAP_VALID;
-
- upa_writeq(val, pbm->pbm_regs + MSI_MAP(msi));
-
- return 0;
-}
-
-static int pci_fire_msiq_alloc(struct pci_pbm_info *pbm)
-{
- unsigned long pages, order, i;
-
- order = get_order(512 * 1024);
- pages = __get_free_pages(GFP_KERNEL | __GFP_COMP, order);
- if (pages == 0UL) {
- printk(KERN_ERR "MSI: Cannot allocate MSI queues (o=%lu).\n",
- order);
- return -ENOMEM;
- }
- memset((char *)pages, 0, PAGE_SIZE << order);
- pbm->msi_queues = (void *) pages;
-
- upa_writeq((EVENT_QUEUE_BASE_ADDR_ALL_ONES |
- __pa(pbm->msi_queues)),
- pbm->pbm_regs + EVENT_QUEUE_BASE_ADDR_REG);
-
- upa_writeq(pbm->portid << 6, pbm->pbm_regs + IMONDO_DATA0);
- upa_writeq(0, pbm->pbm_regs + IMONDO_DATA1);
-
- upa_writeq(pbm->msi32_start, pbm->pbm_regs + MSI_32BIT_ADDR);
- upa_writeq(pbm->msi64_start, pbm->pbm_regs + MSI_64BIT_ADDR);
-
- for (i = 0; i < pbm->msiq_num; i++) {
- upa_writeq(0, pbm->pbm_regs + EVENT_QUEUE_HEAD(i));
- upa_writeq(0, pbm->pbm_regs + EVENT_QUEUE_TAIL(i));
- }
-
- return 0;
-}
-
-static void pci_fire_msiq_free(struct pci_pbm_info *pbm)
-{
- unsigned long pages, order;
-
- order = get_order(512 * 1024);
- pages = (unsigned long) pbm->msi_queues;
-
- free_pages(pages, order);
-
- pbm->msi_queues = NULL;
-}
-
-static int pci_fire_msiq_build_irq(struct pci_pbm_info *pbm,
- unsigned long msiqid,
- unsigned long devino)
-{
- unsigned long cregs = (unsigned long) pbm->pbm_regs;
- unsigned long imap_reg, iclr_reg, int_ctrlr;
- unsigned int virt_irq;
- int fixup;
- u64 val;
-
- imap_reg = cregs + (0x001000UL + (devino * 0x08UL));
- iclr_reg = cregs + (0x001400UL + (devino * 0x08UL));
-
- /* XXX iterate amongst the 4 IRQ controllers XXX */
- int_ctrlr = (1UL << 6);
-
- val = upa_readq(imap_reg);
- val |= (1UL << 63) | int_ctrlr;
- upa_writeq(val, imap_reg);
-
- fixup = ((pbm->portid << 6) | devino) - int_ctrlr;
-
- virt_irq = build_irq(fixup, iclr_reg, imap_reg);
- if (!virt_irq)
- return -ENOMEM;
-
- upa_writeq(EVENT_QUEUE_CONTROL_SET_EN,
- pbm->pbm_regs + EVENT_QUEUE_CONTROL_SET(msiqid));
-
- return virt_irq;
-}
-
-static const struct sparc64_msiq_ops pci_fire_msiq_ops = {
- .get_head = pci_fire_get_head,
- .dequeue_msi = pci_fire_dequeue_msi,
- .set_head = pci_fire_set_head,
- .msi_setup = pci_fire_msi_setup,
- .msi_teardown = pci_fire_msi_teardown,
- .msiq_alloc = pci_fire_msiq_alloc,
- .msiq_free = pci_fire_msiq_free,
- .msiq_build_irq = pci_fire_msiq_build_irq,
-};
-
-static void pci_fire_msi_init(struct pci_pbm_info *pbm)
-{
- sparc64_pbm_msi_init(pbm, &pci_fire_msiq_ops);
-}
-#else /* CONFIG_PCI_MSI */
-static void pci_fire_msi_init(struct pci_pbm_info *pbm)
-{
-}
-#endif /* !(CONFIG_PCI_MSI) */
-
-/* Based at pbm->controller_regs */
-#define FIRE_PARITY_CONTROL 0x470010UL
-#define FIRE_PARITY_ENAB 0x8000000000000000UL
-#define FIRE_FATAL_RESET_CTL 0x471028UL
-#define FIRE_FATAL_RESET_SPARE 0x0000000004000000UL
-#define FIRE_FATAL_RESET_MB 0x0000000002000000UL
-#define FIRE_FATAL_RESET_CPE 0x0000000000008000UL
-#define FIRE_FATAL_RESET_APE 0x0000000000004000UL
-#define FIRE_FATAL_RESET_PIO 0x0000000000000040UL
-#define FIRE_FATAL_RESET_JW 0x0000000000000004UL
-#define FIRE_FATAL_RESET_JI 0x0000000000000002UL
-#define FIRE_FATAL_RESET_JR 0x0000000000000001UL
-#define FIRE_CORE_INTR_ENABLE 0x471800UL
-
-/* Based at pbm->pbm_regs */
-#define FIRE_TLU_CTRL 0x80000UL
-#define FIRE_TLU_CTRL_TIM 0x00000000da000000UL
-#define FIRE_TLU_CTRL_QDET 0x0000000000000100UL
-#define FIRE_TLU_CTRL_CFG 0x0000000000000001UL
-#define FIRE_TLU_DEV_CTRL 0x90008UL
-#define FIRE_TLU_LINK_CTRL 0x90020UL
-#define FIRE_TLU_LINK_CTRL_CLK 0x0000000000000040UL
-#define FIRE_LPU_RESET 0xe2008UL
-#define FIRE_LPU_LLCFG 0xe2200UL
-#define FIRE_LPU_LLCFG_VC0 0x0000000000000100UL
-#define FIRE_LPU_FCTRL_UCTRL 0xe2240UL
-#define FIRE_LPU_FCTRL_UCTRL_N 0x0000000000000002UL
-#define FIRE_LPU_FCTRL_UCTRL_P 0x0000000000000001UL
-#define FIRE_LPU_TXL_FIFOP 0xe2430UL
-#define FIRE_LPU_LTSSM_CFG2 0xe2788UL
-#define FIRE_LPU_LTSSM_CFG3 0xe2790UL
-#define FIRE_LPU_LTSSM_CFG4 0xe2798UL
-#define FIRE_LPU_LTSSM_CFG5 0xe27a0UL
-#define FIRE_DMC_IENAB 0x31800UL
-#define FIRE_DMC_DBG_SEL_A 0x53000UL
-#define FIRE_DMC_DBG_SEL_B 0x53008UL
-#define FIRE_PEC_IENAB 0x51800UL
-
-static void pci_fire_hw_init(struct pci_pbm_info *pbm)
-{
- u64 val;
-
- upa_writeq(FIRE_PARITY_ENAB,
- pbm->controller_regs + FIRE_PARITY_CONTROL);
-
- upa_writeq((FIRE_FATAL_RESET_SPARE |
- FIRE_FATAL_RESET_MB |
- FIRE_FATAL_RESET_CPE |
- FIRE_FATAL_RESET_APE |
- FIRE_FATAL_RESET_PIO |
- FIRE_FATAL_RESET_JW |
- FIRE_FATAL_RESET_JI |
- FIRE_FATAL_RESET_JR),
- pbm->controller_regs + FIRE_FATAL_RESET_CTL);
-
- upa_writeq(~(u64)0, pbm->controller_regs + FIRE_CORE_INTR_ENABLE);
-
- val = upa_readq(pbm->pbm_regs + FIRE_TLU_CTRL);
- val |= (FIRE_TLU_CTRL_TIM |
- FIRE_TLU_CTRL_QDET |
- FIRE_TLU_CTRL_CFG);
- upa_writeq(val, pbm->pbm_regs + FIRE_TLU_CTRL);
- upa_writeq(0, pbm->pbm_regs + FIRE_TLU_DEV_CTRL);
- upa_writeq(FIRE_TLU_LINK_CTRL_CLK,
- pbm->pbm_regs + FIRE_TLU_LINK_CTRL);
-
- upa_writeq(0, pbm->pbm_regs + FIRE_LPU_RESET);
- upa_writeq(FIRE_LPU_LLCFG_VC0, pbm->pbm_regs + FIRE_LPU_LLCFG);
- upa_writeq((FIRE_LPU_FCTRL_UCTRL_N | FIRE_LPU_FCTRL_UCTRL_P),
- pbm->pbm_regs + FIRE_LPU_FCTRL_UCTRL);
- upa_writeq(((0xffff << 16) | (0x0000 << 0)),
- pbm->pbm_regs + FIRE_LPU_TXL_FIFOP);
- upa_writeq(3000000, pbm->pbm_regs + FIRE_LPU_LTSSM_CFG2);
- upa_writeq(500000, pbm->pbm_regs + FIRE_LPU_LTSSM_CFG3);
- upa_writeq((2 << 16) | (140 << 8),
- pbm->pbm_regs + FIRE_LPU_LTSSM_CFG4);
- upa_writeq(0, pbm->pbm_regs + FIRE_LPU_LTSSM_CFG5);
-
- upa_writeq(~(u64)0, pbm->pbm_regs + FIRE_DMC_IENAB);
- upa_writeq(0, pbm->pbm_regs + FIRE_DMC_DBG_SEL_A);
- upa_writeq(0, pbm->pbm_regs + FIRE_DMC_DBG_SEL_B);
-
- upa_writeq(~(u64)0, pbm->pbm_regs + FIRE_PEC_IENAB);
-}
-
-static int __init pci_fire_pbm_init(struct pci_pbm_info *pbm,
- struct of_device *op, u32 portid)
-{
- const struct linux_prom64_registers *regs;
- struct device_node *dp = op->node;
- int err;
-
- pbm->numa_node = -1;
-
- pbm->pci_ops = &sun4u_pci_ops;
- pbm->config_space_reg_bits = 12;
-
- pbm->index = pci_num_pbms++;
-
- pbm->portid = portid;
- pbm->op = op;
- pbm->name = dp->full_name;
-
- regs = of_get_property(dp, "reg", NULL);
- pbm->pbm_regs = regs[0].phys_addr;
- pbm->controller_regs = regs[1].phys_addr - 0x410000UL;
-
- printk("%s: SUN4U PCIE Bus Module\n", pbm->name);
-
- pci_determine_mem_io_space(pbm);
-
- pci_get_pbm_props(pbm);
-
- pci_fire_hw_init(pbm);
-
- err = pci_fire_pbm_iommu_init(pbm);
- if (err)
- return err;
-
- pci_fire_msi_init(pbm);
-
- pbm->pci_bus = pci_scan_one_pbm(pbm, &op->dev);
-
- /* XXX register error interrupt handlers XXX */
-
- pbm->next = pci_pbm_root;
- pci_pbm_root = pbm;
-
- return 0;
-}
-
-static int __devinit fire_probe(struct of_device *op,
- const struct of_device_id *match)
-{
- struct device_node *dp = op->node;
- struct pci_pbm_info *pbm;
- struct iommu *iommu;
- u32 portid;
- int err;
-
- portid = of_getintprop_default(dp, "portid", 0xff);
-
- err = -ENOMEM;
- pbm = kzalloc(sizeof(*pbm), GFP_KERNEL);
- if (!pbm) {
- printk(KERN_ERR PFX "Cannot allocate pci_pbminfo.\n");
- goto out_err;
- }
-
- iommu = kzalloc(sizeof(struct iommu), GFP_KERNEL);
- if (!iommu) {
- printk(KERN_ERR PFX "Cannot allocate PBM iommu.\n");
- goto out_free_controller;
- }
-
- pbm->iommu = iommu;
-
- err = pci_fire_pbm_init(pbm, op, portid);
- if (err)
- goto out_free_iommu;
-
- dev_set_drvdata(&op->dev, pbm);
-
- return 0;
-
-out_free_iommu:
- kfree(pbm->iommu);
-
-out_free_controller:
- kfree(pbm);
-
-out_err:
- return err;
-}
-
-static struct of_device_id __initdata fire_match[] = {
- {
- .name = "pci",
- .compatible = "pciex108e,80f0",
- },
- {},
-};
-
-static struct of_platform_driver fire_driver = {
- .name = DRIVER_NAME,
- .match_table = fire_match,
- .probe = fire_probe,
-};
-
-static int __init fire_init(void)
-{
- return of_register_driver(&fire_driver, &of_bus_type);
-}
-
-subsys_initcall(fire_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff