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Diffstat (limited to 'hw/ppc/spapr_pci.c')
-rw-r--r--hw/ppc/spapr_pci.c839
1 files changed, 839 insertions, 0 deletions
diff --git a/hw/ppc/spapr_pci.c b/hw/ppc/spapr_pci.c
new file mode 100644
index 0000000000..62ff323f73
--- /dev/null
+++ b/hw/ppc/spapr_pci.c
@@ -0,0 +1,839 @@
+/*
+ * QEMU sPAPR PCI host originated from Uninorth PCI host
+ *
+ * Copyright (c) 2011 Alexey Kardashevskiy, IBM Corporation.
+ * Copyright (C) 2011 David Gibson, IBM Corporation.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+#include "hw/hw.h"
+#include "hw/pci/pci.h"
+#include "hw/pci/msi.h"
+#include "hw/pci/msix.h"
+#include "hw/pci/pci_host.h"
+#include "hw/ppc/spapr.h"
+#include "hw/pci-host/spapr.h"
+#include "exec/address-spaces.h"
+#include <libfdt.h>
+#include "trace.h"
+
+#include "hw/pci/pci_bus.h"
+
+/* Copied from the kernel arch/powerpc/platforms/pseries/msi.c */
+#define RTAS_QUERY_FN 0
+#define RTAS_CHANGE_FN 1
+#define RTAS_RESET_FN 2
+#define RTAS_CHANGE_MSI_FN 3
+#define RTAS_CHANGE_MSIX_FN 4
+
+/* Interrupt types to return on RTAS_CHANGE_* */
+#define RTAS_TYPE_MSI 1
+#define RTAS_TYPE_MSIX 2
+
+static sPAPRPHBState *find_phb(sPAPREnvironment *spapr, uint64_t buid)
+{
+ sPAPRPHBState *sphb;
+
+ QLIST_FOREACH(sphb, &spapr->phbs, list) {
+ if (sphb->buid != buid) {
+ continue;
+ }
+ return sphb;
+ }
+
+ return NULL;
+}
+
+static PCIDevice *find_dev(sPAPREnvironment *spapr, uint64_t buid,
+ uint32_t config_addr)
+{
+ sPAPRPHBState *sphb = find_phb(spapr, buid);
+ PCIHostState *phb = PCI_HOST_BRIDGE(sphb);
+ BusState *bus = BUS(phb->bus);
+ BusChild *kid;
+ int devfn = (config_addr >> 8) & 0xFF;
+
+ if (!phb) {
+ return NULL;
+ }
+
+ QTAILQ_FOREACH(kid, &bus->children, sibling) {
+ PCIDevice *dev = (PCIDevice *)kid->child;
+ if (dev->devfn == devfn) {
+ return dev;
+ }
+ }
+
+ return NULL;
+}
+
+static uint32_t rtas_pci_cfgaddr(uint32_t arg)
+{
+ /* This handles the encoding of extended config space addresses */
+ return ((arg >> 20) & 0xf00) | (arg & 0xff);
+}
+
+static void finish_read_pci_config(sPAPREnvironment *spapr, uint64_t buid,
+ uint32_t addr, uint32_t size,
+ target_ulong rets)
+{
+ PCIDevice *pci_dev;
+ uint32_t val;
+
+ if ((size != 1) && (size != 2) && (size != 4)) {
+ /* access must be 1, 2 or 4 bytes */
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+ pci_dev = find_dev(spapr, buid, addr);
+ addr = rtas_pci_cfgaddr(addr);
+
+ if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
+ /* Access must be to a valid device, within bounds and
+ * naturally aligned */
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+ val = pci_host_config_read_common(pci_dev, addr,
+ pci_config_size(pci_dev), size);
+
+ rtas_st(rets, 0, 0);
+ rtas_st(rets, 1, val);
+}
+
+static void rtas_ibm_read_pci_config(sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ uint64_t buid;
+ uint32_t size, addr;
+
+ if ((nargs != 4) || (nret != 2)) {
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+ buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
+ size = rtas_ld(args, 3);
+ addr = rtas_ld(args, 0);
+
+ finish_read_pci_config(spapr, buid, addr, size, rets);
+}
+
+static void rtas_read_pci_config(sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ uint32_t size, addr;
+
+ if ((nargs != 2) || (nret != 2)) {
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+ size = rtas_ld(args, 1);
+ addr = rtas_ld(args, 0);
+
+ finish_read_pci_config(spapr, 0, addr, size, rets);
+}
+
+static void finish_write_pci_config(sPAPREnvironment *spapr, uint64_t buid,
+ uint32_t addr, uint32_t size,
+ uint32_t val, target_ulong rets)
+{
+ PCIDevice *pci_dev;
+
+ if ((size != 1) && (size != 2) && (size != 4)) {
+ /* access must be 1, 2 or 4 bytes */
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+ pci_dev = find_dev(spapr, buid, addr);
+ addr = rtas_pci_cfgaddr(addr);
+
+ if (!pci_dev || (addr % size) || (addr >= pci_config_size(pci_dev))) {
+ /* Access must be to a valid device, within bounds and
+ * naturally aligned */
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+ pci_host_config_write_common(pci_dev, addr, pci_config_size(pci_dev),
+ val, size);
+
+ rtas_st(rets, 0, 0);
+}
+
+static void rtas_ibm_write_pci_config(sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ uint64_t buid;
+ uint32_t val, size, addr;
+
+ if ((nargs != 5) || (nret != 1)) {
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+ buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
+ val = rtas_ld(args, 4);
+ size = rtas_ld(args, 3);
+ addr = rtas_ld(args, 0);
+
+ finish_write_pci_config(spapr, buid, addr, size, val, rets);
+}
+
+static void rtas_write_pci_config(sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args,
+ uint32_t nret, target_ulong rets)
+{
+ uint32_t val, size, addr;
+
+ if ((nargs != 3) || (nret != 1)) {
+ rtas_st(rets, 0, -1);
+ return;
+ }
+
+
+ val = rtas_ld(args, 2);
+ size = rtas_ld(args, 1);
+ addr = rtas_ld(args, 0);
+
+ finish_write_pci_config(spapr, 0, addr, size, val, rets);
+}
+
+/*
+ * Find an entry with config_addr or returns the empty one if not found AND
+ * alloc_new is set.
+ * At the moment the msi_table entries are never released so there is
+ * no point to look till the end of the list if we need to find the free entry.
+ */
+static int spapr_msicfg_find(sPAPRPHBState *phb, uint32_t config_addr,
+ bool alloc_new)
+{
+ int i;
+
+ for (i = 0; i < SPAPR_MSIX_MAX_DEVS; ++i) {
+ if (!phb->msi_table[i].nvec) {
+ break;
+ }
+ if (phb->msi_table[i].config_addr == config_addr) {
+ return i;
+ }
+ }
+ if ((i < SPAPR_MSIX_MAX_DEVS) && alloc_new) {
+ trace_spapr_pci_msi("Allocating new MSI config", i, config_addr);
+ return i;
+ }
+
+ return -1;
+}
+
+/*
+ * Set MSI/MSIX message data.
+ * This is required for msi_notify()/msix_notify() which
+ * will write at the addresses via spapr_msi_write().
+ */
+static void spapr_msi_setmsg(PCIDevice *pdev, hwaddr addr,
+ bool msix, unsigned req_num)
+{
+ unsigned i;
+ MSIMessage msg = { .address = addr, .data = 0 };
+
+ if (!msix) {
+ msi_set_message(pdev, msg);
+ trace_spapr_pci_msi_setup(pdev->name, 0, msg.address);
+ return;
+ }
+
+ for (i = 0; i < req_num; ++i) {
+ msg.address = addr | (i << 2);
+ msix_set_message(pdev, i, msg);
+ trace_spapr_pci_msi_setup(pdev->name, i, msg.address);
+ }
+}
+
+static void rtas_ibm_change_msi(sPAPREnvironment *spapr,
+ uint32_t token, uint32_t nargs,
+ target_ulong args, uint32_t nret,
+ target_ulong rets)
+{
+ uint32_t config_addr = rtas_ld(args, 0);
+ uint64_t buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
+ unsigned int func = rtas_ld(args, 3);
+ unsigned int req_num = rtas_ld(args, 4); /* 0 == remove all */
+ unsigned int seq_num = rtas_ld(args, 5);
+ unsigned int ret_intr_type;
+ int ndev, irq;
+ sPAPRPHBState *phb = NULL;
+ PCIDevice *pdev = NULL;
+
+ switch (func) {
+ case RTAS_CHANGE_MSI_FN:
+ case RTAS_CHANGE_FN:
+ ret_intr_type = RTAS_TYPE_MSI;
+ break;
+ case RTAS_CHANGE_MSIX_FN:
+ ret_intr_type = RTAS_TYPE_MSIX;
+ break;
+ default:
+ fprintf(stderr, "rtas_ibm_change_msi(%u) is not implemented\n", func);
+ rtas_st(rets, 0, -3); /* Parameter error */
+ return;
+ }
+
+ /* Fins sPAPRPHBState */
+ phb = find_phb(spapr, buid);
+ if (phb) {
+ pdev = find_dev(spapr, buid, config_addr);
+ }
+ if (!phb || !pdev) {
+ rtas_st(rets, 0, -3); /* Parameter error */
+ return;
+ }
+
+ /* Releasing MSIs */
+ if (!req_num) {
+ ndev = spapr_msicfg_find(phb, config_addr, false);
+ if (ndev < 0) {
+ trace_spapr_pci_msi("MSI has not been enabled", -1, config_addr);
+ rtas_st(rets, 0, -1); /* Hardware error */
+ return;
+ }
+ trace_spapr_pci_msi("Released MSIs", ndev, config_addr);
+ rtas_st(rets, 0, 0);
+ rtas_st(rets, 1, 0);
+ return;
+ }
+
+ /* Enabling MSI */
+
+ /* Find a device number in the map to add or reuse the existing one */
+ ndev = spapr_msicfg_find(phb, config_addr, true);
+ if (ndev >= SPAPR_MSIX_MAX_DEVS || ndev < 0) {
+ fprintf(stderr, "No free entry for a new MSI device\n");
+ rtas_st(rets, 0, -1); /* Hardware error */
+ return;
+ }
+ trace_spapr_pci_msi("Configuring MSI", ndev, config_addr);
+
+ /* Check if there is an old config and MSI number has not changed */
+ if (phb->msi_table[ndev].nvec && (req_num != phb->msi_table[ndev].nvec)) {
+ /* Unexpected behaviour */
+ fprintf(stderr, "Cannot reuse MSI config for device#%d", ndev);
+ rtas_st(rets, 0, -1); /* Hardware error */
+ return;
+ }
+
+ /* There is no cached config, allocate MSIs */
+ if (!phb->msi_table[ndev].nvec) {
+ irq = spapr_allocate_irq_block(req_num, false);
+ if (irq < 0) {
+ fprintf(stderr, "Cannot allocate MSIs for device#%d", ndev);
+ rtas_st(rets, 0, -1); /* Hardware error */
+ return;
+ }
+ phb->msi_table[ndev].irq = irq;
+ phb->msi_table[ndev].nvec = req_num;
+ phb->msi_table[ndev].config_addr = config_addr;
+ }
+
+ /* Setup MSI/MSIX vectors in the device (via cfgspace or MSIX BAR) */
+ spapr_msi_setmsg(pdev, phb->msi_win_addr | (ndev << 16),
+ ret_intr_type == RTAS_TYPE_MSIX, req_num);
+
+ rtas_st(rets, 0, 0);
+ rtas_st(rets, 1, req_num);
+ rtas_st(rets, 2, ++seq_num);
+ rtas_st(rets, 3, ret_intr_type);
+
+ trace_spapr_pci_rtas_ibm_change_msi(func, req_num);
+}
+
+static void rtas_ibm_query_interrupt_source_number(sPAPREnvironment *spapr,
+ uint32_t token,
+ uint32_t nargs,
+ target_ulong args,
+ uint32_t nret,
+ target_ulong rets)
+{
+ uint32_t config_addr = rtas_ld(args, 0);
+ uint64_t buid = ((uint64_t)rtas_ld(args, 1) << 32) | rtas_ld(args, 2);
+ unsigned int intr_src_num = -1, ioa_intr_num = rtas_ld(args, 3);
+ int ndev;
+ sPAPRPHBState *phb = NULL;
+
+ /* Fins sPAPRPHBState */
+ phb = find_phb(spapr, buid);
+ if (!phb) {
+ rtas_st(rets, 0, -3); /* Parameter error */
+ return;
+ }
+
+ /* Find device descriptor and start IRQ */
+ ndev = spapr_msicfg_find(phb, config_addr, false);
+ if (ndev < 0) {
+ trace_spapr_pci_msi("MSI has not been enabled", -1, config_addr);
+ rtas_st(rets, 0, -1); /* Hardware error */
+ return;
+ }
+
+ intr_src_num = phb->msi_table[ndev].irq + ioa_intr_num;
+ trace_spapr_pci_rtas_ibm_query_interrupt_source_number(ioa_intr_num,
+ intr_src_num);
+
+ rtas_st(rets, 0, 0);
+ rtas_st(rets, 1, intr_src_num);
+ rtas_st(rets, 2, 1);/* 0 == level; 1 == edge */
+}
+
+static int pci_spapr_swizzle(int slot, int pin)
+{
+ return (slot + pin) % PCI_NUM_PINS;
+}
+
+static int pci_spapr_map_irq(PCIDevice *pci_dev, int irq_num)
+{
+ /*
+ * Here we need to convert pci_dev + irq_num to some unique value
+ * which is less than number of IRQs on the specific bus (4). We
+ * use standard PCI swizzling, that is (slot number + pin number)
+ * % 4.
+ */
+ return pci_spapr_swizzle(PCI_SLOT(pci_dev->devfn), irq_num);
+}
+
+static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
+{
+ /*
+ * Here we use the number returned by pci_spapr_map_irq to find a
+ * corresponding qemu_irq.
+ */
+ sPAPRPHBState *phb = opaque;
+
+ trace_spapr_pci_lsi_set(phb->dtbusname, irq_num, phb->lsi_table[irq_num].irq);
+ qemu_set_irq(spapr_phb_lsi_qirq(phb, irq_num), level);
+}
+
+static uint64_t spapr_io_read(void *opaque, hwaddr addr,
+ unsigned size)
+{
+ switch (size) {
+ case 1:
+ return cpu_inb(addr);
+ case 2:
+ return cpu_inw(addr);
+ case 4:
+ return cpu_inl(addr);
+ }
+ assert(0);
+}
+
+static void spapr_io_write(void *opaque, hwaddr addr,
+ uint64_t data, unsigned size)
+{
+ switch (size) {
+ case 1:
+ cpu_outb(addr, data);
+ return;
+ case 2:
+ cpu_outw(addr, data);
+ return;
+ case 4:
+ cpu_outl(addr, data);
+ return;
+ }
+ assert(0);
+}
+
+static const MemoryRegionOps spapr_io_ops = {
+ .endianness = DEVICE_LITTLE_ENDIAN,
+ .read = spapr_io_read,
+ .write = spapr_io_write
+};
+
+/*
+ * MSI/MSIX memory region implementation.
+ * The handler handles both MSI and MSIX.
+ * For MSI-X, the vector number is encoded as a part of the address,
+ * data is set to 0.
+ * For MSI, the vector number is encoded in least bits in data.
+ */
+static void spapr_msi_write(void *opaque, hwaddr addr,
+ uint64_t data, unsigned size)
+{
+ sPAPRPHBState *phb = opaque;
+ int ndev = addr >> 16;
+ int vec = ((addr & 0xFFFF) >> 2) | data;
+ uint32_t irq = phb->msi_table[ndev].irq + vec;
+
+ trace_spapr_pci_msi_write(addr, data, irq);
+
+ qemu_irq_pulse(xics_get_qirq(spapr->icp, irq));
+}
+
+static const MemoryRegionOps spapr_msi_ops = {
+ /* There is no .read as the read result is undefined by PCI spec */
+ .read = NULL,
+ .write = spapr_msi_write,
+ .endianness = DEVICE_LITTLE_ENDIAN
+};
+
+/*
+ * PHB PCI device
+ */
+static DMAContext *spapr_pci_dma_context_fn(PCIBus *bus, void *opaque,
+ int devfn)
+{
+ sPAPRPHBState *phb = opaque;
+
+ return phb->dma;
+}
+
+static int spapr_phb_init(SysBusDevice *s)
+{
+ sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
+ PCIHostState *phb = PCI_HOST_BRIDGE(s);
+ const char *busname;
+ char *namebuf;
+ int i;
+ PCIBus *bus;
+
+ if (sphb->index != -1) {
+ hwaddr windows_base;
+
+ if ((sphb->buid != -1) || (sphb->dma_liobn != -1)
+ || (sphb->mem_win_addr != -1)
+ || (sphb->io_win_addr != -1)
+ || (sphb->msi_win_addr != -1)) {
+ fprintf(stderr, "Either \"index\" or other parameters must"
+ " be specified for PAPR PHB, not both\n");
+ return -1;
+ }
+
+ sphb->buid = SPAPR_PCI_BASE_BUID + sphb->index;
+ sphb->dma_liobn = SPAPR_PCI_BASE_LIOBN + sphb->index;
+
+ windows_base = SPAPR_PCI_WINDOW_BASE
+ + sphb->index * SPAPR_PCI_WINDOW_SPACING;
+ sphb->mem_win_addr = windows_base + SPAPR_PCI_MMIO_WIN_OFF;
+ sphb->io_win_addr = windows_base + SPAPR_PCI_IO_WIN_OFF;
+ sphb->msi_win_addr = windows_base + SPAPR_PCI_MSI_WIN_OFF;
+ }
+
+ if (sphb->buid == -1) {
+ fprintf(stderr, "BUID not specified for PHB\n");
+ return -1;
+ }
+
+ if (sphb->dma_liobn == -1) {
+ fprintf(stderr, "LIOBN not specified for PHB\n");
+ return -1;
+ }
+
+ if (sphb->mem_win_addr == -1) {
+ fprintf(stderr, "Memory window address not specified for PHB\n");
+ return -1;
+ }
+
+ if (sphb->io_win_addr == -1) {
+ fprintf(stderr, "IO window address not specified for PHB\n");
+ return -1;
+ }
+
+ if (sphb->msi_win_addr == -1) {
+ fprintf(stderr, "MSI window address not specified for PHB\n");
+ return -1;
+ }
+
+ if (find_phb(spapr, sphb->buid)) {
+ fprintf(stderr, "PCI host bridges must have unique BUIDs\n");
+ return -1;
+ }
+
+ sphb->dtbusname = g_strdup_printf("pci@%" PRIx64, sphb->buid);
+
+ namebuf = alloca(strlen(sphb->dtbusname) + 32);
+
+ /* Initialize memory regions */
+ sprintf(namebuf, "%s.mmio", sphb->dtbusname);
+ memory_region_init(&sphb->memspace, namebuf, INT64_MAX);
+
+ sprintf(namebuf, "%s.mmio-alias", sphb->dtbusname);
+ memory_region_init_alias(&sphb->memwindow, namebuf, &sphb->memspace,
+ SPAPR_PCI_MEM_WIN_BUS_OFFSET, sphb->mem_win_size);
+ memory_region_add_subregion(get_system_memory(), sphb->mem_win_addr,
+ &sphb->memwindow);
+
+ /* On ppc, we only have MMIO no specific IO space from the CPU
+ * perspective. In theory we ought to be able to embed the PCI IO
+ * memory region direction in the system memory space. However,
+ * if any of the IO BAR subregions use the old_portio mechanism,
+ * that won't be processed properly unless accessed from the
+ * system io address space. This hack to bounce things via
+ * system_io works around the problem until all the users of
+ * old_portion are updated */
+ sprintf(namebuf, "%s.io", sphb->dtbusname);
+ memory_region_init(&sphb->iospace, namebuf, SPAPR_PCI_IO_WIN_SIZE);
+ /* FIXME: fix to support multiple PHBs */
+ memory_region_add_subregion(get_system_io(), 0, &sphb->iospace);
+
+ sprintf(namebuf, "%s.io-alias", sphb->dtbusname);
+ memory_region_init_io(&sphb->iowindow, &spapr_io_ops, sphb,
+ namebuf, SPAPR_PCI_IO_WIN_SIZE);
+ memory_region_add_subregion(get_system_memory(), sphb->io_win_addr,
+ &sphb->iowindow);
+
+ /* As MSI/MSIX interrupts trigger by writing at MSI/MSIX vectors,
+ * we need to allocate some memory to catch those writes coming
+ * from msi_notify()/msix_notify() */
+ if (msi_supported) {
+ sprintf(namebuf, "%s.msi", sphb->dtbusname);
+ memory_region_init_io(&sphb->msiwindow, &spapr_msi_ops, sphb,
+ namebuf, SPAPR_MSIX_MAX_DEVS * 0x10000);
+ memory_region_add_subregion(get_system_memory(), sphb->msi_win_addr,
+ &sphb->msiwindow);
+ }
+
+ /*
+ * Selecting a busname is more complex than you'd think, due to
+ * interacting constraints. If the user has specified an id
+ * explicitly for the phb , then we want to use the qdev default
+ * of naming the bus based on the bridge device (so the user can
+ * then assign devices to it in the way they expect). For the
+ * first / default PCI bus (index=0) we want to use just "pci"
+ * because libvirt expects there to be a bus called, simply,
+ * "pci". Otherwise, we use the same name as in the device tree,
+ * since it's unique by construction, and makes the guest visible
+ * BUID clear.
+ */
+ if (s->qdev.id) {
+ busname = NULL;
+ } else if (sphb->index == 0) {
+ busname = "pci";
+ } else {
+ busname = sphb->dtbusname;
+ }
+ bus = pci_register_bus(DEVICE(s), busname,
+ pci_spapr_set_irq, pci_spapr_map_irq, sphb,
+ &sphb->memspace, &sphb->iospace,
+ PCI_DEVFN(0, 0), PCI_NUM_PINS, TYPE_PCI_BUS);
+ phb->bus = bus;
+
+ sphb->dma_window_start = 0;
+ sphb->dma_window_size = 0x40000000;
+ sphb->dma = spapr_tce_new_dma_context(sphb->dma_liobn, sphb->dma_window_size);
+ if (!sphb->dma) {
+ fprintf(stderr, "Unable to create TCE table for %s\n", sphb->dtbusname);
+ return -1;
+ }
+ pci_setup_iommu(bus, spapr_pci_dma_context_fn, sphb);
+
+ QLIST_INSERT_HEAD(&spapr->phbs, sphb, list);
+
+ /* Initialize the LSI table */
+ for (i = 0; i < PCI_NUM_PINS; i++) {
+ uint32_t irq;
+
+ irq = spapr_allocate_lsi(0);
+ if (!irq) {
+ return -1;
+ }
+
+ sphb->lsi_table[i].irq = irq;
+ }
+
+ return 0;
+}
+
+static void spapr_phb_reset(DeviceState *qdev)
+{
+ SysBusDevice *s = SYS_BUS_DEVICE(qdev);
+ sPAPRPHBState *sphb = SPAPR_PCI_HOST_BRIDGE(s);
+
+ /* Reset the IOMMU state */
+ spapr_tce_reset(sphb->dma);
+}
+
+static Property spapr_phb_properties[] = {
+ DEFINE_PROP_INT32("index", sPAPRPHBState, index, -1),
+ DEFINE_PROP_HEX64("buid", sPAPRPHBState, buid, -1),
+ DEFINE_PROP_HEX32("liobn", sPAPRPHBState, dma_liobn, -1),
+ DEFINE_PROP_HEX64("mem_win_addr", sPAPRPHBState, mem_win_addr, -1),
+ DEFINE_PROP_HEX64("mem_win_size", sPAPRPHBState, mem_win_size,
+ SPAPR_PCI_MMIO_WIN_SIZE),
+ DEFINE_PROP_HEX64("io_win_addr", sPAPRPHBState, io_win_addr, -1),
+ DEFINE_PROP_HEX64("io_win_size", sPAPRPHBState, io_win_size,
+ SPAPR_PCI_IO_WIN_SIZE),
+ DEFINE_PROP_HEX64("msi_win_addr", sPAPRPHBState, msi_win_addr, -1),
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void spapr_phb_class_init(ObjectClass *klass, void *data)
+{
+ SysBusDeviceClass *sdc = SYS_BUS_DEVICE_CLASS(klass);
+ DeviceClass *dc = DEVICE_CLASS(klass);
+
+ sdc->init = spapr_phb_init;
+ dc->props = spapr_phb_properties;
+ dc->reset = spapr_phb_reset;
+}
+
+static const TypeInfo spapr_phb_info = {
+ .name = TYPE_SPAPR_PCI_HOST_BRIDGE,
+ .parent = TYPE_PCI_HOST_BRIDGE,
+ .instance_size = sizeof(sPAPRPHBState),
+ .class_init = spapr_phb_class_init,
+};
+
+PCIHostState *spapr_create_phb(sPAPREnvironment *spapr, int index)
+{
+ DeviceState *dev;
+
+ dev = qdev_create(NULL, TYPE_SPAPR_PCI_HOST_BRIDGE);
+ qdev_prop_set_uint32(dev, "index", index);
+ qdev_init_nofail(dev);
+
+ return PCI_HOST_BRIDGE(dev);
+}
+
+/* Macros to operate with address in OF binding to PCI */
+#define b_x(x, p, l) (((x) & ((1<<(l))-1)) << (p))
+#define b_n(x) b_x((x), 31, 1) /* 0 if relocatable */
+#define b_p(x) b_x((x), 30, 1) /* 1 if prefetchable */
+#define b_t(x) b_x((x), 29, 1) /* 1 if the address is aliased */
+#define b_ss(x) b_x((x), 24, 2) /* the space code */
+#define b_bbbbbbbb(x) b_x((x), 16, 8) /* bus number */
+#define b_ddddd(x) b_x((x), 11, 5) /* device number */
+#define b_fff(x) b_x((x), 8, 3) /* function number */
+#define b_rrrrrrrr(x) b_x((x), 0, 8) /* register number */
+
+int spapr_populate_pci_dt(sPAPRPHBState *phb,
+ uint32_t xics_phandle,
+ void *fdt)
+{
+ int bus_off, i, j;
+ char nodename[256];
+ uint32_t bus_range[] = { cpu_to_be32(0), cpu_to_be32(0xff) };
+ struct {
+ uint32_t hi;
+ uint64_t child;
+ uint64_t parent;
+ uint64_t size;
+ } QEMU_PACKED ranges[] = {
+ {
+ cpu_to_be32(b_ss(1)), cpu_to_be64(0),
+ cpu_to_be64(phb->io_win_addr),
+ cpu_to_be64(memory_region_size(&phb->iospace)),
+ },
+ {
+ cpu_to_be32(b_ss(2)), cpu_to_be64(SPAPR_PCI_MEM_WIN_BUS_OFFSET),
+ cpu_to_be64(phb->mem_win_addr),
+ cpu_to_be64(memory_region_size(&phb->memwindow)),
+ },
+ };
+ uint64_t bus_reg[] = { cpu_to_be64(phb->buid), 0 };
+ uint32_t interrupt_map_mask[] = {
+ cpu_to_be32(b_ddddd(-1)|b_fff(0)), 0x0, 0x0, cpu_to_be32(-1)};
+ uint32_t interrupt_map[PCI_SLOT_MAX * PCI_NUM_PINS][7];
+
+ /* Start populating the FDT */
+ sprintf(nodename, "pci@%" PRIx64, phb->buid);
+ bus_off = fdt_add_subnode(fdt, 0, nodename);
+ if (bus_off < 0) {
+ return bus_off;
+ }
+
+#define _FDT(exp) \
+ do { \
+ int ret = (exp); \
+ if (ret < 0) { \
+ return ret; \
+ } \
+ } while (0)
+
+ /* Write PHB properties */
+ _FDT(fdt_setprop_string(fdt, bus_off, "device_type", "pci"));
+ _FDT(fdt_setprop_string(fdt, bus_off, "compatible", "IBM,Logical_PHB"));
+ _FDT(fdt_setprop_cell(fdt, bus_off, "#address-cells", 0x3));
+ _FDT(fdt_setprop_cell(fdt, bus_off, "#size-cells", 0x2));
+ _FDT(fdt_setprop_cell(fdt, bus_off, "#interrupt-cells", 0x1));
+ _FDT(fdt_setprop(fdt, bus_off, "used-by-rtas", NULL, 0));
+ _FDT(fdt_setprop(fdt, bus_off, "bus-range", &bus_range, sizeof(bus_range)));
+ _FDT(fdt_setprop(fdt, bus_off, "ranges", &ranges, sizeof(ranges)));
+ _FDT(fdt_setprop(fdt, bus_off, "reg", &bus_reg, sizeof(bus_reg)));
+ _FDT(fdt_setprop_cell(fdt, bus_off, "ibm,pci-config-space-type", 0x1));
+
+ /* Build the interrupt-map, this must matches what is done
+ * in pci_spapr_map_irq
+ */
+ _FDT(fdt_setprop(fdt, bus_off, "interrupt-map-mask",
+ &interrupt_map_mask, sizeof(interrupt_map_mask)));
+ for (i = 0; i < PCI_SLOT_MAX; i++) {
+ for (j = 0; j < PCI_NUM_PINS; j++) {
+ uint32_t *irqmap = interrupt_map[i*PCI_NUM_PINS + j];
+ int lsi_num = pci_spapr_swizzle(i, j);
+
+ irqmap[0] = cpu_to_be32(b_ddddd(i)|b_fff(0));
+ irqmap[1] = 0;
+ irqmap[2] = 0;
+ irqmap[3] = cpu_to_be32(j+1);
+ irqmap[4] = cpu_to_be32(xics_phandle);
+ irqmap[5] = cpu_to_be32(phb->lsi_table[lsi_num].irq);
+ irqmap[6] = cpu_to_be32(0x8);
+ }
+ }
+ /* Write interrupt map */
+ _FDT(fdt_setprop(fdt, bus_off, "interrupt-map", &interrupt_map,
+ sizeof(interrupt_map)));
+
+ spapr_dma_dt(fdt, bus_off, "ibm,dma-window",
+ phb->dma_liobn, phb->dma_window_start,
+ phb->dma_window_size);
+
+ return 0;
+}
+
+void spapr_pci_rtas_init(void)
+{
+ spapr_rtas_register("read-pci-config", rtas_read_pci_config);
+ spapr_rtas_register("write-pci-config", rtas_write_pci_config);
+ spapr_rtas_register("ibm,read-pci-config", rtas_ibm_read_pci_config);
+ spapr_rtas_register("ibm,write-pci-config", rtas_ibm_write_pci_config);
+ if (msi_supported) {
+ spapr_rtas_register("ibm,query-interrupt-source-number",
+ rtas_ibm_query_interrupt_source_number);
+ spapr_rtas_register("ibm,change-msi", rtas_ibm_change_msi);
+ }
+}
+
+static void spapr_pci_register_types(void)
+{
+ type_register_static(&spapr_phb_info);
+}
+
+type_init(spapr_pci_register_types)
generated by cgit v1.2.3 (git 2.26.2) at 2024-11-27 18:59:20 +0000