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-rw-r--r--arch/sparc/kernel/pci_fire.c521
1 files changed, 521 insertions, 0 deletions
diff --git a/arch/sparc/kernel/pci_fire.c b/arch/sparc/kernel/pci_fire.c
new file mode 100644
index 000000000000..9462b68f4894
--- /dev/null
+++ b/arch/sparc/kernel/pci_fire.c
@@ -0,0 +1,521 @@
+/* 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);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.