pci: move pci core code to hw/pci

Move files and modify makefiles to pick them at the
new location.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 0 insertions, 562 deletions

diff --git a/hw/msix.c b/hw/msix.c
deleted file mode 100644
index 136ef09373..0000000000
--- a/hw/msix.c
+++ /dev/null
@@ -1,562 +0,0 @@
-/*
- * MSI-X device support
- *
- * This module includes support for MSI-X in pci devices.
- *
- * Author: Michael S. Tsirkin <mst@redhat.com>
- *
- *  Copyright (c) 2009, Red Hat Inc, Michael S. Tsirkin (mst@redhat.com)
- *
- * This work is licensed under the terms of the GNU GPL, version 2.  See
- * the COPYING file in the top-level directory.
- *
- * Contributions after 2012-01-13 are licensed under the terms of the
- * GNU GPL, version 2 or (at your option) any later version.
- */
-
-#include "hw.h"
-#include "msi.h"
-#include "msix.h"
-#include "pci.h"
-#include "range.h"
-
-#define MSIX_CAP_LENGTH 12
-
-/* MSI enable bit and maskall bit are in byte 1 in FLAGS register */
-#define MSIX_CONTROL_OFFSET (PCI_MSIX_FLAGS + 1)
-#define MSIX_ENABLE_MASK (PCI_MSIX_FLAGS_ENABLE >> 8)
-#define MSIX_MASKALL_MASK (PCI_MSIX_FLAGS_MASKALL >> 8)
-
-static MSIMessage msix_get_message(PCIDevice *dev, unsigned vector)
-{
-    uint8_t *table_entry = dev->msix_table + vector * PCI_MSIX_ENTRY_SIZE;
-    MSIMessage msg;
-
-    msg.address = pci_get_quad(table_entry + PCI_MSIX_ENTRY_LOWER_ADDR);
-    msg.data = pci_get_long(table_entry + PCI_MSIX_ENTRY_DATA);
-    return msg;
-}
-
-/*
- * Special API for POWER to configure the vectors through
- * a side channel. Should never be used by devices.
- */
-void msix_set_message(PCIDevice *dev, int vector, struct MSIMessage msg)
-{
-    uint8_t *table_entry = dev->msix_table + vector * PCI_MSIX_ENTRY_SIZE;
-
-    pci_set_quad(table_entry + PCI_MSIX_ENTRY_LOWER_ADDR, msg.address);
-    pci_set_long(table_entry + PCI_MSIX_ENTRY_DATA, msg.data);
-    table_entry[PCI_MSIX_ENTRY_VECTOR_CTRL] &= ~PCI_MSIX_ENTRY_CTRL_MASKBIT;
-}
-
-static uint8_t msix_pending_mask(int vector)
-{
-    return 1 << (vector % 8);
-}
-
-static uint8_t *msix_pending_byte(PCIDevice *dev, int vector)
-{
-    return dev->msix_pba + vector / 8;
-}
-
-static int msix_is_pending(PCIDevice *dev, int vector)
-{
-    return *msix_pending_byte(dev, vector) & msix_pending_mask(vector);
-}
-
-static void msix_set_pending(PCIDevice *dev, int vector)
-{
-    *msix_pending_byte(dev, vector) |= msix_pending_mask(vector);
-}
-
-static void msix_clr_pending(PCIDevice *dev, int vector)
-{
-    *msix_pending_byte(dev, vector) &= ~msix_pending_mask(vector);
-}
-
-static bool msix_vector_masked(PCIDevice *dev, int vector, bool fmask)
-{
-    unsigned offset = vector * PCI_MSIX_ENTRY_SIZE + PCI_MSIX_ENTRY_VECTOR_CTRL;
-    return fmask || dev->msix_table[offset] & PCI_MSIX_ENTRY_CTRL_MASKBIT;
-}
-
-static bool msix_is_masked(PCIDevice *dev, int vector)
-{
-    return msix_vector_masked(dev, vector, dev->msix_function_masked);
-}
-
-static void msix_fire_vector_notifier(PCIDevice *dev,
-                                      unsigned int vector, bool is_masked)
-{
-    MSIMessage msg;
-    int ret;
-
-    if (!dev->msix_vector_use_notifier) {
-        return;
-    }
-    if (is_masked) {
-        dev->msix_vector_release_notifier(dev, vector);
-    } else {
-        msg = msix_get_message(dev, vector);
-        ret = dev->msix_vector_use_notifier(dev, vector, msg);
-        assert(ret >= 0);
-    }
-}
-
-static void msix_handle_mask_update(PCIDevice *dev, int vector, bool was_masked)
-{
-    bool is_masked = msix_is_masked(dev, vector);
-
-    if (is_masked == was_masked) {
-        return;
-    }
-
-    msix_fire_vector_notifier(dev, vector, is_masked);
-
-    if (!is_masked && msix_is_pending(dev, vector)) {
-        msix_clr_pending(dev, vector);
-        msix_notify(dev, vector);
-    }
-}
-
-static void msix_update_function_masked(PCIDevice *dev)
-{
-    dev->msix_function_masked = !msix_enabled(dev) ||
-        (dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] & MSIX_MASKALL_MASK);
-}
-
-/* Handle MSI-X capability config write. */
-void msix_write_config(PCIDevice *dev, uint32_t addr,
-                       uint32_t val, int len)
-{
-    unsigned enable_pos = dev->msix_cap + MSIX_CONTROL_OFFSET;
-    int vector;
-    bool was_masked;
-
-    if (!msix_present(dev) || !range_covers_byte(addr, len, enable_pos)) {
-        return;
-    }
-
-    was_masked = dev->msix_function_masked;
-    msix_update_function_masked(dev);
-
-    if (!msix_enabled(dev)) {
-        return;
-    }
-
-    pci_device_deassert_intx(dev);
-
-    if (dev->msix_function_masked == was_masked) {
-        return;
-    }
-
-    for (vector = 0; vector < dev->msix_entries_nr; ++vector) {
-        msix_handle_mask_update(dev, vector,
-                                msix_vector_masked(dev, vector, was_masked));
-    }
-}
-
-static uint64_t msix_table_mmio_read(void *opaque, hwaddr addr,
-                                     unsigned size)
-{
-    PCIDevice *dev = opaque;
-
-    return pci_get_long(dev->msix_table + addr);
-}
-
-static void msix_table_mmio_write(void *opaque, hwaddr addr,
-                                  uint64_t val, unsigned size)
-{
-    PCIDevice *dev = opaque;
-    int vector = addr / PCI_MSIX_ENTRY_SIZE;
-    bool was_masked;
-
-    was_masked = msix_is_masked(dev, vector);
-    pci_set_long(dev->msix_table + addr, val);
-    msix_handle_mask_update(dev, vector, was_masked);
-}
-
-static const MemoryRegionOps msix_table_mmio_ops = {
-    .read = msix_table_mmio_read,
-    .write = msix_table_mmio_write,
-    /* TODO: MSIX should be LITTLE_ENDIAN. */
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .valid = {
-        .min_access_size = 4,
-        .max_access_size = 4,
-    },
-};
-
-static uint64_t msix_pba_mmio_read(void *opaque, hwaddr addr,
-                                   unsigned size)
-{
-    PCIDevice *dev = opaque;
-
-    return pci_get_long(dev->msix_pba + addr);
-}
-
-static const MemoryRegionOps msix_pba_mmio_ops = {
-    .read = msix_pba_mmio_read,
-    /* TODO: MSIX should be LITTLE_ENDIAN. */
-    .endianness = DEVICE_NATIVE_ENDIAN,
-    .valid = {
-        .min_access_size = 4,
-        .max_access_size = 4,
-    },
-};
-
-static void msix_mask_all(struct PCIDevice *dev, unsigned nentries)
-{
-    int vector;
-
-    for (vector = 0; vector < nentries; ++vector) {
-        unsigned offset =
-            vector * PCI_MSIX_ENTRY_SIZE + PCI_MSIX_ENTRY_VECTOR_CTRL;
-        bool was_masked = msix_is_masked(dev, vector);
-
-        dev->msix_table[offset] |= PCI_MSIX_ENTRY_CTRL_MASKBIT;
-        msix_handle_mask_update(dev, vector, was_masked);
-    }
-}
-
-/* Initialize the MSI-X structures */
-int msix_init(struct PCIDevice *dev, unsigned short nentries,
-              MemoryRegion *table_bar, uint8_t table_bar_nr,
-              unsigned table_offset, MemoryRegion *pba_bar,
-              uint8_t pba_bar_nr, unsigned pba_offset, uint8_t cap_pos)
-{
-    int cap;
-    unsigned table_size, pba_size;
-    uint8_t *config;
-
-    /* Nothing to do if MSI is not supported by interrupt controller */
-    if (!msi_supported) {
-        return -ENOTSUP;
-    }
-
-    if (nentries < 1 || nentries > PCI_MSIX_FLAGS_QSIZE + 1) {
-        return -EINVAL;
-    }
-
-    table_size = nentries * PCI_MSIX_ENTRY_SIZE;
-    pba_size = QEMU_ALIGN_UP(nentries, 64) / 8;
-
-    /* Sanity test: table & pba don't overlap, fit within BARs, min aligned */
-    if ((table_bar_nr == pba_bar_nr &&
-         ranges_overlap(table_offset, table_size, pba_offset, pba_size)) ||
-        table_offset + table_size > memory_region_size(table_bar) ||
-        pba_offset + pba_size > memory_region_size(pba_bar) ||
-        (table_offset | pba_offset) & PCI_MSIX_FLAGS_BIRMASK) {
-        return -EINVAL;
-    }
-
-    cap = pci_add_capability(dev, PCI_CAP_ID_MSIX, cap_pos, MSIX_CAP_LENGTH);
-    if (cap < 0) {
-        return cap;
-    }
-
-    dev->msix_cap = cap;
-    dev->cap_present |= QEMU_PCI_CAP_MSIX;
-    config = dev->config + cap;
-
-    pci_set_word(config + PCI_MSIX_FLAGS, nentries - 1);
-    dev->msix_entries_nr = nentries;
-    dev->msix_function_masked = true;
-
-    pci_set_long(config + PCI_MSIX_TABLE, table_offset | table_bar_nr);
-    pci_set_long(config + PCI_MSIX_PBA, pba_offset | pba_bar_nr);
-
-    /* Make flags bit writable. */
-    dev->wmask[cap + MSIX_CONTROL_OFFSET] |= MSIX_ENABLE_MASK |
-                                             MSIX_MASKALL_MASK;
-
-    dev->msix_table = g_malloc0(table_size);
-    dev->msix_pba = g_malloc0(pba_size);
-    dev->msix_entry_used = g_malloc0(nentries * sizeof *dev->msix_entry_used);
-
-    msix_mask_all(dev, nentries);
-
-    memory_region_init_io(&dev->msix_table_mmio, &msix_table_mmio_ops, dev,
-                          "msix-table", table_size);
-    memory_region_add_subregion(table_bar, table_offset, &dev->msix_table_mmio);
-    memory_region_init_io(&dev->msix_pba_mmio, &msix_pba_mmio_ops, dev,
-                          "msix-pba", pba_size);
-    memory_region_add_subregion(pba_bar, pba_offset, &dev->msix_pba_mmio);
-
-    return 0;
-}
-
-int msix_init_exclusive_bar(PCIDevice *dev, unsigned short nentries,
-                            uint8_t bar_nr)
-{
-    int ret;
-    char *name;
-
-    /*
-     * Migration compatibility dictates that this remains a 4k
-     * BAR with the vector table in the lower half and PBA in
-     * the upper half.  Do not use these elsewhere!
-     */
-#define MSIX_EXCLUSIVE_BAR_SIZE 4096
-#define MSIX_EXCLUSIVE_BAR_TABLE_OFFSET 0
-#define MSIX_EXCLUSIVE_BAR_PBA_OFFSET (MSIX_EXCLUSIVE_BAR_SIZE / 2)
-#define MSIX_EXCLUSIVE_CAP_OFFSET 0
-
-    if (nentries * PCI_MSIX_ENTRY_SIZE > MSIX_EXCLUSIVE_BAR_PBA_OFFSET) {
-        return -EINVAL;
-    }
-
-    name = g_strdup_printf("%s-msix", dev->name);
-    memory_region_init(&dev->msix_exclusive_bar, name, MSIX_EXCLUSIVE_BAR_SIZE);
-    g_free(name);
-
-    ret = msix_init(dev, nentries, &dev->msix_exclusive_bar, bar_nr,
-                    MSIX_EXCLUSIVE_BAR_TABLE_OFFSET, &dev->msix_exclusive_bar,
-                    bar_nr, MSIX_EXCLUSIVE_BAR_PBA_OFFSET,
-                    MSIX_EXCLUSIVE_CAP_OFFSET);
-    if (ret) {
-        memory_region_destroy(&dev->msix_exclusive_bar);
-        return ret;
-    }
-
-    pci_register_bar(dev, bar_nr, PCI_BASE_ADDRESS_SPACE_MEMORY,
-                     &dev->msix_exclusive_bar);
-
-    return 0;
-}
-
-static void msix_free_irq_entries(PCIDevice *dev)
-{
-    int vector;
-
-    for (vector = 0; vector < dev->msix_entries_nr; ++vector) {
-        dev->msix_entry_used[vector] = 0;
-        msix_clr_pending(dev, vector);
-    }
-}
-
-static void msix_clear_all_vectors(PCIDevice *dev)
-{
-    int vector;
-
-    for (vector = 0; vector < dev->msix_entries_nr; ++vector) {
-        msix_clr_pending(dev, vector);
-    }
-}
-
-/* Clean up resources for the device. */
-void msix_uninit(PCIDevice *dev, MemoryRegion *table_bar, MemoryRegion *pba_bar)
-{
-    if (!msix_present(dev)) {
-        return;
-    }
-    pci_del_capability(dev, PCI_CAP_ID_MSIX, MSIX_CAP_LENGTH);
-    dev->msix_cap = 0;
-    msix_free_irq_entries(dev);
-    dev->msix_entries_nr = 0;
-    memory_region_del_subregion(pba_bar, &dev->msix_pba_mmio);
-    memory_region_destroy(&dev->msix_pba_mmio);
-    g_free(dev->msix_pba);
-    dev->msix_pba = NULL;
-    memory_region_del_subregion(table_bar, &dev->msix_table_mmio);
-    memory_region_destroy(&dev->msix_table_mmio);
-    g_free(dev->msix_table);
-    dev->msix_table = NULL;
-    g_free(dev->msix_entry_used);
-    dev->msix_entry_used = NULL;
-    dev->cap_present &= ~QEMU_PCI_CAP_MSIX;
-}
-
-void msix_uninit_exclusive_bar(PCIDevice *dev)
-{
-    if (msix_present(dev)) {
-        msix_uninit(dev, &dev->msix_exclusive_bar, &dev->msix_exclusive_bar);
-        memory_region_destroy(&dev->msix_exclusive_bar);
-    }
-}
-
-void msix_save(PCIDevice *dev, QEMUFile *f)
-{
-    unsigned n = dev->msix_entries_nr;
-
-    if (!msix_present(dev)) {
-        return;
-    }
-
-    qemu_put_buffer(f, dev->msix_table, n * PCI_MSIX_ENTRY_SIZE);
-    qemu_put_buffer(f, dev->msix_pba, (n + 7) / 8);
-}
-
-/* Should be called after restoring the config space. */
-void msix_load(PCIDevice *dev, QEMUFile *f)
-{
-    unsigned n = dev->msix_entries_nr;
-    unsigned int vector;
-
-    if (!msix_present(dev)) {
-        return;
-    }
-
-    msix_clear_all_vectors(dev);
-    qemu_get_buffer(f, dev->msix_table, n * PCI_MSIX_ENTRY_SIZE);
-    qemu_get_buffer(f, dev->msix_pba, (n + 7) / 8);
-    msix_update_function_masked(dev);
-
-    for (vector = 0; vector < n; vector++) {
-        msix_handle_mask_update(dev, vector, true);
-    }
-}
-
-/* Does device support MSI-X? */
-int msix_present(PCIDevice *dev)
-{
-    return dev->cap_present & QEMU_PCI_CAP_MSIX;
-}
-
-/* Is MSI-X enabled? */
-int msix_enabled(PCIDevice *dev)
-{
-    return (dev->cap_present & QEMU_PCI_CAP_MSIX) &&
-        (dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &
-         MSIX_ENABLE_MASK);
-}
-
-/* Send an MSI-X message */
-void msix_notify(PCIDevice *dev, unsigned vector)
-{
-    MSIMessage msg;
-
-    if (vector >= dev->msix_entries_nr || !dev->msix_entry_used[vector])
-        return;
-    if (msix_is_masked(dev, vector)) {
-        msix_set_pending(dev, vector);
-        return;
-    }
-
-    msg = msix_get_message(dev, vector);
-
-    stl_le_phys(msg.address, msg.data);
-}
-
-void msix_reset(PCIDevice *dev)
-{
-    if (!msix_present(dev)) {
-        return;
-    }
-    msix_clear_all_vectors(dev);
-    dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &=
-	    ~dev->wmask[dev->msix_cap + MSIX_CONTROL_OFFSET];
-    memset(dev->msix_table, 0, dev->msix_entries_nr * PCI_MSIX_ENTRY_SIZE);
-    memset(dev->msix_pba, 0, QEMU_ALIGN_UP(dev->msix_entries_nr, 64) / 8);
-    msix_mask_all(dev, dev->msix_entries_nr);
-}
-
-/* PCI spec suggests that devices make it possible for software to configure
- * less vectors than supported by the device, but does not specify a standard
- * mechanism for devices to do so.
- *
- * We support this by asking devices to declare vectors software is going to
- * actually use, and checking this on the notification path. Devices that
- * don't want to follow the spec suggestion can declare all vectors as used. */
-
-/* Mark vector as used. */
-int msix_vector_use(PCIDevice *dev, unsigned vector)
-{
-    if (vector >= dev->msix_entries_nr)
-        return -EINVAL;
-    dev->msix_entry_used[vector]++;
-    return 0;
-}
-
-/* Mark vector as unused. */
-void msix_vector_unuse(PCIDevice *dev, unsigned vector)
-{
-    if (vector >= dev->msix_entries_nr || !dev->msix_entry_used[vector]) {
-        return;
-    }
-    if (--dev->msix_entry_used[vector]) {
-        return;
-    }
-    msix_clr_pending(dev, vector);
-}
-
-void msix_unuse_all_vectors(PCIDevice *dev)
-{
-    if (!msix_present(dev)) {
-        return;
-    }
-    msix_free_irq_entries(dev);
-}
-
-unsigned int msix_nr_vectors_allocated(const PCIDevice *dev)
-{
-    return dev->msix_entries_nr;
-}
-
-static int msix_set_notifier_for_vector(PCIDevice *dev, unsigned int vector)
-{
-    MSIMessage msg;
-
-    if (msix_is_masked(dev, vector)) {
-        return 0;
-    }
-    msg = msix_get_message(dev, vector);
-    return dev->msix_vector_use_notifier(dev, vector, msg);
-}
-
-static void msix_unset_notifier_for_vector(PCIDevice *dev, unsigned int vector)
-{
-    if (msix_is_masked(dev, vector)) {
-        return;
-    }
-    dev->msix_vector_release_notifier(dev, vector);
-}
-
-int msix_set_vector_notifiers(PCIDevice *dev,
-                              MSIVectorUseNotifier use_notifier,
-                              MSIVectorReleaseNotifier release_notifier)
-{
-    int vector, ret;
-
-    assert(use_notifier && release_notifier);
-
-    dev->msix_vector_use_notifier = use_notifier;
-    dev->msix_vector_release_notifier = release_notifier;
-
-    if ((dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &
-        (MSIX_ENABLE_MASK | MSIX_MASKALL_MASK)) == MSIX_ENABLE_MASK) {
-        for (vector = 0; vector < dev->msix_entries_nr; vector++) {
-            ret = msix_set_notifier_for_vector(dev, vector);
-            if (ret < 0) {
-                goto undo;
-            }
-        }
-    }
-    return 0;
-
-undo:
-    while (--vector >= 0) {
-        msix_unset_notifier_for_vector(dev, vector);
-    }
-    dev->msix_vector_use_notifier = NULL;
-    dev->msix_vector_release_notifier = NULL;
-    return ret;
-}
-
-void msix_unset_vector_notifiers(PCIDevice *dev)
-{
-    int vector;
-
-    assert(dev->msix_vector_use_notifier &&
-           dev->msix_vector_release_notifier);
-
-    if ((dev->config[dev->msix_cap + MSIX_CONTROL_OFFSET] &
-        (MSIX_ENABLE_MASK | MSIX_MASKALL_MASK)) == MSIX_ENABLE_MASK) {
-        for (vector = 0; vector < dev->msix_entries_nr; vector++) {
-            msix_unset_notifier_for_vector(dev, vector);
-        }
-    }
-    dev->msix_vector_use_notifier = NULL;
-    dev->msix_vector_release_notifier = NULL;
-}