|
| From: | BALATON Zoltan |
| Subject: | Re: [Qemu-ppc] [Qemu-devel] [PATCH 10/15] ppc440: Add emulation of plb-pcix controller found in some 440 SoCs |
| Date: | Fri, 25 Aug 2017 00:12:14 +0200 (CEST) |
| User-agent: | Alpine 2.21 (BSF 202 2017-01-01) |
On Sun, 20 Aug 2017, Philippe Mathieu-Daudé wrote:
Hi Zoltan,
Hello, Thanks for the review and comments.
On 08/20/2017 02:23 PM, BALATON Zoltan wrote:This is the PCIX controller found in newer 440 core SoCs e.g. the AMMC 460EX. The device tree refers to this as plb-pcix compared to the plb-pci controller in older 440 SoCs. Signed-off-by: BALATON Zoltan <address@hidden> --- hw/ppc/Makefile.objs | 2 +-hw/ppc/ppc440_pcix.c | 516 +++++++++++++++++++++++++++++++++++++++++++++++++++2 files changed, 517 insertions(+), 1 deletion(-) create mode 100644 hw/ppc/ppc440_pcix.c diff --git a/hw/ppc/Makefile.objs b/hw/ppc/Makefile.objs index 7efc686..fc39fe4 100644 --- a/hw/ppc/Makefile.objs +++ b/hw/ppc/Makefile.objs @@ -13,7 +13,7 @@ endif obj-$(CONFIG_PSERIES) += spapr_rtas_ddw.o # PowerPC 4xx boards obj-y += ppc405_boards.o ppc4xx_devs.o ppc405_uc.o ppc440_bamboo.o -obj-y += ppc4xx_pci.o +obj-y += ppc4xx_pci.o ppc440_pcix.o # PReP obj-$(CONFIG_PREP) += prep.o obj-$(CONFIG_PREP) += prep_systemio.o diff --git a/hw/ppc/ppc440_pcix.c b/hw/ppc/ppc440_pcix.c new file mode 100644 index 0000000..5c2ceec --- /dev/null +++ b/hw/ppc/ppc440_pcix.c @@ -0,0 +1,516 @@ +/* + * Emulation of the ibm,plb-pcix PCI controller + * This is found in some 440 SoCs e.g. the 460EX. + * + * Copyright (c) 2016 BALATON Zoltan + * + * Derived from ppc4xx_pci.c and pci-host/ppce500.c + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, version 2, as + * published by the Free Software Foundation. + * + * 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, see <http://www.gnu.org/licenses/>. + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "hw/hw.h" +#include "hw/ppc/ppc.h" +#include "hw/ppc/ppc4xx.h" +#include "hw/pci/pci.h" +#include "hw/pci/pci_host.h" +#include "exec/address-spaces.h" + +/*#define DEBUG_PCI*/ + +#ifdef DEBUG_PCI +#define DPRINTF(fmt, ...) fprintf(stderr, fmt, ## __VA_ARGS__); +#else +#define DPRINTF(fmt, ...) +#endif /* DEBUG */ + +struct PLBOutMap { + uint64_t la; + uint64_t pcia; + uint32_t sa; + MemoryRegion mr; +}; + +struct PLBInMap { + uint64_t sa; + uint64_t la; + MemoryRegion mr; +}; + +#define TYPE_PPC440_PCIX_HOST_BRIDGE "ppc440-pcix-host" +#define PPC440_PCIX_HOST_BRIDGE(obj) \ + OBJECT_CHECK(PPC440PCIXState, (obj), TYPE_PPC440_PCIX_HOST_BRIDGE) + +#define PPC440_PCIX_NR_POMS 3 +#define PPC440_PCIX_NR_PIMS 3 + +typedef struct PPC440PCIXState { + PCIHostState parent_obj; + + PCIDevice *dev; + struct PLBOutMap pom[PPC440_PCIX_NR_POMS]; + struct PLBInMap pim[PPC440_PCIX_NR_PIMS]; + uint32_t sts; + qemu_irq irq[PCI_NUM_PINS]; + AddressSpace bm_as; + MemoryRegion bm; + + MemoryRegion container; + MemoryRegion iomem; + MemoryRegion busmem; +} PPC440PCIXState; + +#define PPC440_REG_BASE 0x80000 +#define PPC440_REG_SIZE 0xff + +#define PCIC0_CFGADDR 0x0 +#define PCIC0_CFGDATA 0x4 + +#define PCIX0_POM0LAL 0x68 +#define PCIX0_POM0LAH 0x6c +#define PCIX0_POM0SA 0x70 +#define PCIX0_POM0PCIAL 0x74 +#define PCIX0_POM0PCIAH 0x78 +#define PCIX0_POM1LAL 0x7c +#define PCIX0_POM1LAH 0x80 +#define PCIX0_POM1SA 0x84 +#define PCIX0_POM1PCIAL 0x88 +#define PCIX0_POM1PCIAH 0x8c +#define PCIX0_POM2SA 0x90 + +#define PCIX0_PIM0SAL 0x98 +#define PCIX0_PIM0LAL 0x9c +#define PCIX0_PIM0LAH 0xa0 +#define PCIX0_PIM1SA 0xa4 +#define PCIX0_PIM1LAL 0xa8 +#define PCIX0_PIM1LAH 0xac +#define PCIX0_PIM2SAL 0xb0 +#define PCIX0_PIM2LAL 0xb4 +#define PCIX0_PIM2LAH 0xb8 +#define PCIX0_PIM0SAH 0xf8 +#define PCIX0_PIM2SAH 0xfc + +#define PCIX0_STS 0xe0 + +#define PCI_ALL_SIZE (PPC440_REG_BASE + PPC440_REG_SIZE) + +static void ppc440_pcix_clear_region(MemoryRegion *parent, + MemoryRegion *mem) +{ + if (memory_region_is_mapped(mem)) { + memory_region_del_subregion(parent, mem); + object_unparent(OBJECT(mem)); + } +} + +/* DMA mapping */ +static void ppc440_pcix_update_pim(PPC440PCIXState *s, int idx) +{ + MemoryRegion *mem = &s->pim[idx].mr; + char *name; + uint64_t size; + + /* Before we modify anything, unmap and destroy the region */ + ppc440_pcix_clear_region(&s->bm, mem); + + if (!(s->pim[idx].sa & 1)) { + /* Not enabled, nothing to do */ + return; + } + + name = g_strdup_printf("PCI Inbound Window %d", idx); + size = ~(s->pim[idx].sa & ~7ULL) + 1; + memory_region_init_alias(mem, OBJECT(s), name, get_system_memory(), + s->pim[idx].la, size); + memory_region_add_subregion_overlap(&s->bm, 0, mem, -1); + g_free(name); + + DPRINTF("%s: Added window %d of size=%#"PRIx64" to CPU=%#"PRIx64"\n", + __func__, idx, size, s->pim[idx].la); +} + +/* BAR mapping */ +static void ppc440_pcix_update_pom(PPC440PCIXState *s, int idx) +{ + MemoryRegion *mem = &s->pom[idx].mr; + MemoryRegion *address_space_mem = get_system_memory(); + char *name; + uint32_t size; + + /* Before we modify anything, unmap and destroy the region */ + ppc440_pcix_clear_region(address_space_mem, mem); + + if (!(s->pom[idx].sa & 1)) { + /* Not enabled, nothing to do */ + return; + } + + name = g_strdup_printf("PCI Outbound Window %d", idx); + size = ~(s->pom[idx].sa & 0xfffffffe) + 1; + if (!size) { + size = 0xffffffff; + } + memory_region_init_alias(mem, OBJECT(s), name, &s->busmem, + s->pom[idx].pcia, size); + memory_region_add_subregion(address_space_mem, s->pom[idx].la, mem); + g_free(name); + + DPRINTF("%s: Added window %d of size=%#x from CPU=%#"PRIx64 + " to PCI=%#"PRIx64"\n", __func__, idx, size, s->pom[idx].la, + s->pom[idx].pcia); +} + +static void ppc440_pcix_reg_write4(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + struct PPC440PCIXState *s = opaque; + + DPRINTF("%s: addr 0x%"PRIx64 " = %"PRIx64 "\n", __func__, addr, val); + switch (addr) { + case PCI_VENDOR_ID ... PCI_MAX_LAT: + stl_le_p(s->dev->config + addr, val); + break; + + case PCIX0_POM0LAL:Those lines ...+ s->pom[0].la &= 0xffffffff00000000ULL; + s->pom[0].la |= val;equivs to: s->pom[0].la = deposit64(s->pom[0].la, 0, 32, val);+ ppc440_pcix_update_pom(s, 0); + break; + case PCIX0_POM0LAH:Those+ s->pom[0].la &= 0xffffffffULL; + s->pom[0].la |= val << 32;to: s->pom[0].la = deposit64(s->pom[0].la, 32, 32, val);
Except that deposit64 also seems to call an (in this case) unnecessary assert. Not sure how much overhead is that and I don't think this is performance critical as these regs are probably not accessed too frequently but why not avoid an unneded call for such simple operation? The deposit and extract functions are not currently used in most other device models as it seems so I'm happy with the current way unless there's a good reason to change it other than one line instead of two. But the current version could also be written as one I line just found this easier to read but it's personal taste I guess so everyone can have different view on this what's more readable to them. If less lines is preferred I would rather make them one line without calling deposit here. But that would increase the number of paranthesis. Maybe I could define some macros for this and use those instead.
+ ppc440_pcix_update_pom(s, 0); + break; + case PCIX0_POM0SA: + s->pom[0].sa = val; + ppc440_pcix_update_pom(s, 0); + break; + case PCIX0_POM0PCIAL: + s->pom[0].pcia &= 0xffffffff00000000ULL; + s->pom[0].pcia |= val;and so on+ ppc440_pcix_update_pom(s, 0); + break; + case PCIX0_POM0PCIAH: + s->pom[0].pcia &= 0xffffffffULL; + s->pom[0].pcia |= val << 32; + ppc440_pcix_update_pom(s, 0); + break; + case PCIX0_POM1LAL: + s->pom[1].la &= 0xffffffff00000000ULL; + s->pom[1].la |= val; + ppc440_pcix_update_pom(s, 1); + break; + case PCIX0_POM1LAH: + s->pom[1].la &= 0xffffffffULL; + s->pom[1].la |= val << 32; + ppc440_pcix_update_pom(s, 1); + break; + case PCIX0_POM1SA: + s->pom[1].sa = val; + ppc440_pcix_update_pom(s, 1); + break; + case PCIX0_POM1PCIAL: + s->pom[1].pcia &= 0xffffffff00000000ULL; + s->pom[1].pcia |= val; + ppc440_pcix_update_pom(s, 1); + break; + case PCIX0_POM1PCIAH: + s->pom[1].pcia &= 0xffffffffULL; + s->pom[1].pcia |= val << 32; + ppc440_pcix_update_pom(s, 1); + break; + case PCIX0_POM2SA: + s->pom[2].sa = val; + break; + + case PCIX0_PIM0SAL: + s->pim[0].sa &= 0xffffffff00000000ULL; + s->pim[0].sa |= val; + ppc440_pcix_update_pim(s, 0); + break; + case PCIX0_PIM0LAL: + s->pim[0].la &= 0xffffffff00000000ULL; + s->pim[0].la |= val; + ppc440_pcix_update_pim(s, 0); + break; + case PCIX0_PIM0LAH: + s->pim[0].la &= 0xffffffffULL; + s->pim[0].la |= val << 32; + ppc440_pcix_update_pim(s, 0); + break; + case PCIX0_PIM1SA: + s->pim[1].sa = val; + ppc440_pcix_update_pim(s, 1); + break; + case PCIX0_PIM1LAL: + s->pim[1].la &= 0xffffffff00000000ULL; + s->pim[1].la |= val; + ppc440_pcix_update_pim(s, 1); + break; + case PCIX0_PIM1LAH: + s->pim[1].la &= 0xffffffffULL; + s->pim[1].la |= val << 32; + ppc440_pcix_update_pim(s, 1); + break; + case PCIX0_PIM2SAL: + s->pim[2].sa &= 0xffffffff00000000ULL; + s->pim[2].sa = val; + ppc440_pcix_update_pim(s, 2); + break; + case PCIX0_PIM2LAL: + s->pim[2].la &= 0xffffffff00000000ULL; + s->pim[2].la |= val; + ppc440_pcix_update_pim(s, 2); + break; + case PCIX0_PIM2LAH: + s->pim[2].la &= 0xffffffffULL; + s->pim[2].la |= val << 32; + ppc440_pcix_update_pim(s, 2); + break; + + case PCIX0_STS: + s->sts = val; + break; + + case PCIX0_PIM0SAH: + s->pim[0].sa &= 0xffffffffULL; + s->pim[0].sa |= val << 32; + ppc440_pcix_update_pim(s, 0); + break; + case PCIX0_PIM2SAH: + s->pim[2].sa &= 0xffffffffULL; + s->pim[2].sa |= val << 32; + ppc440_pcix_update_pim(s, 2); + break; + + default: + printf("%s: unhandled PCI internal register 0x%lx\n", __func__, + (unsigned long)addr); + break; + } +} + +static uint64_t ppc440_pcix_reg_read4(void *opaque, hwaddr addr, + unsigned size) +{ + struct PPC440PCIXState *s = opaque; + uint32_t val; + + switch (addr) { + case PCI_VENDOR_ID ... PCI_MAX_LAT: + val = ldl_le_p(s->dev->config + addr); + break; + + case PCIX0_POM0LAL: + val = s->pom[0].la;This should be val = s->pom[0].la & 0xffffffffULL;
Since val is uint32_t the value should be automatically truncated to 32 bit, shouldn't it? Is there a reason explicit masks are needed here? Is this truncation not well defined and some compilers may do it differently?
Thank you, BALATON Zoltan
or: val = extract64(s->pom[0].la, 0, 32);+ break; + case PCIX0_POM0LAH: + val = s->pom[0].la >> 32;or to be consistent: val = extract64(s->pom[0].la, 32, 32);+ break; + case PCIX0_POM0SA: + val = s->pom[0].sa; + break; + case PCIX0_POM0PCIAL: + val = s->pom[0].pcia;also 32-bit masked+ break; + case PCIX0_POM0PCIAH: + val = s->pom[0].pcia >> 32; + break; + case PCIX0_POM1LAL: + val = s->pom[1].la;also 32-bit masked+ break; + case PCIX0_POM1LAH: + val = s->pom[1].la >> 32; + break; + case PCIX0_POM1SA: + val = s->pom[1].sa;also 32-bit masked, etc...+ break; + case PCIX0_POM1PCIAL: + val = s->pom[1].pcia; + break; + case PCIX0_POM1PCIAH: + val = s->pom[1].pcia >> 32; + break; + case PCIX0_POM2SA: + val = s->pom[2].sa; + break; + + case PCIX0_PIM0SAL: + val = s->pim[0].sa; + break; + case PCIX0_PIM0LAL: + val = s->pim[0].la; + break; + case PCIX0_PIM0LAH: + val = s->pim[0].la >> 32; + break; + case PCIX0_PIM1SA: + val = s->pim[1].sa; + break; + case PCIX0_PIM1LAL: + val = s->pim[1].la; + break; + case PCIX0_PIM1LAH: + val = s->pim[1].la >> 32; + break; + case PCIX0_PIM2SAL: + val = s->pim[2].sa; + break; + case PCIX0_PIM2LAL: + val = s->pim[2].la; + break; + case PCIX0_PIM2LAH: + val = s->pim[2].la >> 32; + break; + + case PCIX0_STS: + val = s->sts; + break; + + case PCIX0_PIM0SAH: + val = s->pim[0].sa >> 32; + break; + case PCIX0_PIM2SAH: + val = s->pim[2].sa >> 32; + break; + + default: + printf("%s: invalid PCI internal register 0x%lx\n", __func__, + (unsigned long)addr); + val = 0; + } + + DPRINTF("%s: addr 0x%"PRIx64 " = %"PRIx32 "\n", __func__, addr, val); + return val; +} + +static const MemoryRegionOps pci_reg_ops = { + .read = ppc440_pcix_reg_read4, + .write = ppc440_pcix_reg_write4, + .endianness = DEVICE_LITTLE_ENDIAN, +}; + +static void ppc440_pcix_reset(DeviceState *dev) +{ + struct PPC440PCIXState *s = PPC440_PCIX_HOST_BRIDGE(dev); + int i; + + for (i = 0; i < PPC440_PCIX_NR_POMS; i++) { + ppc440_pcix_clear_region(get_system_memory(), &s->pom[i].mr); + } + for (i = 0; i < PPC440_PCIX_NR_PIMS; i++) { + ppc440_pcix_clear_region(&s->bm, &s->pim[i].mr); + } + memset(s->pom, 0, sizeof(s->pom)); + memset(s->pim, 0, sizeof(s->pim)); + for (i = 0; i < PPC440_PCIX_NR_PIMS; i++) { + s->pim[i].sa = 0xffffffff00000000ULL; + } + s->sts = 0; +} + +/* All pins from each slot are tied to a single board IRQ. + * This may need further refactoring for other boards. */ +static int ppc440_pcix_map_irq(PCIDevice *pci_dev, int irq_num) +{ + int slot = pci_dev->devfn >> 3; + + DPRINTF("%s: devfn %x irq %d -> %d\n", __func__, + pci_dev->devfn, irq_num, slot); + + return slot - 1; +} + +static void ppc440_pcix_set_irq(void *opaque, int irq_num, int level) +{ + qemu_irq *pci_irqs = opaque; + + DPRINTF("%s: PCI irq %d\n", __func__, irq_num); + if (irq_num < 0) { + error_report("%s: PCI irq %d", __func__, irq_num); + return; + } + qemu_set_irq(pci_irqs[irq_num], level); +} ++static AddressSpace *ppc440_pcix_set_iommu(PCIBus *b, void *opaque, int devfn)+{ + PPC440PCIXState *s = opaque; + + return &s->bm_as; +} + +static int ppc440_pcix_initfn(SysBusDevice *dev) +{ + PPC440PCIXState *s; + PCIHostState *h; + int i; + + h = PCI_HOST_BRIDGE(dev); + s = PPC440_PCIX_HOST_BRIDGE(dev); + + for (i = 0; i < ARRAY_SIZE(s->irq); i++) { + sysbus_init_irq(dev, &s->irq[i]); + } ++ memory_region_init(&s->busmem, OBJECT(dev), "pci bus memory", UINT64_MAX);+ h->bus = pci_register_bus(DEVICE(dev), NULL, ppc440_pcix_set_irq, + ppc440_pcix_map_irq, s->irq, &s->busmem,+ get_system_io(), PCI_DEVFN(0, 0), 4, TYPE_PCI_BUS);++ s->dev = pci_create_simple(h->bus, PCI_DEVFN(0, 0), "ppc4xx-host-bridge");+ + memory_region_init(&s->bm, OBJECT(s), "bm-ppc440-pcix", UINT64_MAX); + memory_region_add_subregion(&s->bm, 0x0, &s->busmem); + address_space_init(&s->bm_as, &s->bm, "pci-bm"); + pci_setup_iommu(h->bus, ppc440_pcix_set_iommu, s); ++ memory_region_init(&s->container, OBJECT(s), "pci-container", PCI_ALL_SIZE); + memory_region_init_io(&h->conf_mem, OBJECT(s), &pci_host_conf_le_ops, h,+ "pci-conf-idx", 4);+ memory_region_init_io(&h->data_mem, OBJECT(s), &pci_host_data_le_ops, h,+ "pci-conf-data", 4); + memory_region_init_io(&s->iomem, OBJECT(s), &pci_reg_ops, s, + "pci.reg", PPC440_REG_SIZE);+ memory_region_add_subregion(&s->container, PCIC0_CFGADDR, &h->conf_mem); + memory_region_add_subregion(&s->container, PCIC0_CFGDATA, &h->data_mem); + memory_region_add_subregion(&s->container, PPC440_REG_BASE, &s->iomem);+ sysbus_init_mmio(dev, &s->container); + + return 0; +} + +static void ppc440_pcix_class_init(ObjectClass *klass, void *data) +{ + SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass); + DeviceClass *dc = DEVICE_CLASS(klass); + + k->init = ppc440_pcix_initfn; + dc->reset = ppc440_pcix_reset; +} + +static const TypeInfo ppc440_pcix_info = { + .name = TYPE_PPC440_PCIX_HOST_BRIDGE, + .parent = TYPE_PCI_HOST_BRIDGE, + .instance_size = sizeof(PPC440PCIXState), + .class_init = ppc440_pcix_class_init, +}; + +static void ppc440_pcix_register_types(void) +{ + type_register_static(&ppc440_pcix_info); +} + +type_init(ppc440_pcix_register_types)
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