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-rw-r--r--sys/dev/pci/pci.c344
1 files changed, 0 insertions, 344 deletions
diff --git a/sys/dev/pci/pci.c b/sys/dev/pci/pci.c
deleted file mode 100644
index 9a8eae4..0000000
--- a/sys/dev/pci/pci.c
+++ /dev/null
@@ -1,344 +0,0 @@
-/*
- * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are met:
- *
- * 1. Redistributions of source code must retain the above copyright notice,
- * this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. Neither the name of Hyra nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
- * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <dev/pci/pci.h>
-#include <dev/pci/pcivar.h>
-#include <sys/cdefs.h>
-#include <sys/panic.h>
-#include <sys/queue.h>
-#include <sys/syslog.h>
-#include <sys/errno.h>
-#include <vm/dynalloc.h>
-#include <machine/bus.h>
-#if defined(__x86_64__)
-#include <machine/io.h>
-#endif
-#include <assert.h>
-
-__MODULE_NAME("pci");
-__KERNEL_META("$Hyra$: pci.c, Ian Marco Moffett, "
- "PCI driver core");
-
-#define pr_trace(fmt, ...) kprintf("pci: " fmt, ##__VA_ARGS__)
-
-static TAILQ_HEAD(, pci_device) device_list;
-static int access_method = PCI_ACCESS_CAM;
-
-/*
- * Read device's legacy PCI CAM space
- *
- * @dev: Device to read.
- * @offset: Offset to read at.
- *
- * XXX: Do not use directly!
- */
-static uint32_t
-pci_cam_read(const struct pci_device *dev, uint32_t offset)
-{
-#if defined(__x86_64__)
- uint32_t address, data;
-
- address = __BIT(31) |
- (offset & ~3) |
- (dev->func << 8) |
- (dev->slot << 11) |
- (dev->bus << 16);
-
- outl(0xCF8, address);
- data = inl(0xCFC) >> ((offset & 3) * 8);
- return data;
-#else
- panic("Invalid arch (%s())\n", __func__);
-#endif
-}
-
-/*
- * Write to device's legacy PCI CAM space
- *
- * @dev: Device to write to.
- * @offset: Offset to write at.
- *
- * XXX: Do not use directly!
- */
-static void
-pci_cam_write(const struct pci_device *dev, uint32_t offset, uint32_t value)
-{
-#if defined(__x86_64__)
- uint32_t address;
-
- address = __BIT(31) |
- (offset & ~3) |
- (dev->func << 8) |
- (dev->slot << 11) |
- (dev->bus << 16);
-
- outl(0xCF8, address);
- outb(0xCFC, value);
-#else
- panic("Invalid arch (%s())\n", __func__);
-#endif
-}
-
-static bool
-pci_device_exists(uint8_t bus, uint8_t slot, uint8_t func)
-{
- uint16_t vendor_id;
- struct pci_device dev_tmp = {
- .bus = bus,
- .slot = slot,
- .func = func
- };
-
- vendor_id = pci_cam_read(&dev_tmp, 0x0) & 0xFFFF;
-
- if (vendor_id == 0xFFFF) {
- return false;
- }
-
- return true;
-}
-
-/*
- * Sets other device information e.g., device id, vendor id, etc
- *
- * @dev: Device descriptor to set up.
- *
- * XXX: Expects device bus, slot and func to be set.
- */
-static void
-pci_set_device_info(struct pci_device *dev)
-{
- uint32_t classrev;
-
- dev->vendor_id = pci_readl(dev, PCIREG_VENDOR_ID) & __MASK(16);
- dev->device_id = pci_readl(dev, PCIREG_DEVICE_ID) & __MASK(16);
- classrev = pci_readl(dev, PCIREG_CLASSREV);
-
- dev->pci_class = PCIREG_CLASS(classrev);
- dev->pci_subclass = PCIREG_SUBCLASS(classrev);
- dev->prog_if = PCIREG_PROGIF(classrev);
-
- dev->bar[0] = pci_readl(dev, PCIREG_BAR0);
- dev->bar[1] = pci_readl(dev, PCIREG_BAR1);
- dev->bar[2] = pci_readl(dev, PCIREG_BAR2);
- dev->bar[3] = pci_readl(dev, PCIREG_BAR3);
- dev->bar[4] = pci_readl(dev, PCIREG_BAR4);
- dev->bar[5] = pci_readl(dev, PCIREG_BAR5);
-
- dev->irq_line = pci_readl(dev, PCIREG_IRQLINE) & __MASK(8);
-}
-
-static void
-pci_register_device(uint8_t bus, uint8_t slot, uint8_t func)
-{
- struct pci_device *dev = NULL;
-
- if (!pci_device_exists(bus, slot, func)) {
- return;
- }
-
- dev = dynalloc(sizeof(struct pci_device));
- __assert(dev != NULL);
-
- dev->bus = bus;
- dev->slot = slot;
- dev->func = func;
-
- pci_set_device_info(dev);
- TAILQ_INSERT_TAIL(&device_list, dev, link);
-}
-
-static void
-pci_scan_bus(uint8_t bus)
-{
- for (int slot = 0; slot < 32; ++slot) {
- for (int func = 0; func < 8; ++func) {
- pci_register_device(bus, slot, func);
- }
- }
-}
-
-/*
- * Convert a BAR number to BAR register offset.
- *
- * @dev: Device of BAR to check.
- * @bar: Bar number.
- */
-static uint8_t
-pci_get_barreg(struct pci_device *dev, uint8_t bar)
-{
- switch (bar) {
- case 0: return PCIREG_BAR0;
- case 1: return PCIREG_BAR1;
- case 2: return PCIREG_BAR2;
- case 3: return PCIREG_BAR3;
- case 4: return PCIREG_BAR4;
- case 5: return PCIREG_BAR5;
- default: return 0;
- }
-}
-
-/*
- * Get size length of memory region that a PCI(e) BAR
- * covers. A returned value of zero is invalid and indicates
- * an error.
- *
- * @dev: Device of BAR to get.
- * @bar: BAR number.
- */
-uint32_t
-pci_bar_size(struct pci_device *dev, uint8_t bar)
-{
- uint8_t bar_reg = pci_get_barreg(dev, bar);
- uint32_t tmp, size;
-
- if (bar_reg == 0) {
- return 0;
- }
-
- /*
- * Get the length of the region this BAR covers by writing a
- * mask of 32 bits into the BAR register and seeing how many
- * bits are unset. We can use this to compute the size of the
- * region. We know that log2(len) bits must be unset.
- */
- tmp = pci_readl(dev, bar_reg);
- pci_writel(dev, bar_reg, __MASK(32));
- size = pci_readl(dev, bar_reg);
- size = ~size + 1;
-
- /* Now we need to restore the previous value */
- pci_writel(dev, bar_reg, tmp);
- return size;
-}
-
-/*
- * Read PCI(e) configuration space.
- *
- * @dev: Device to read from.
- * @offset: Offset to read at.
- */
-uint32_t
-pci_readl(struct pci_device *dev, uint32_t offset)
-{
- if (access_method == PCI_ACCESS_CAM) {
- return pci_cam_read(dev, offset);
- }
-
- panic("Invalid access method (%s())\n", __func__);
- __builtin_unreachable();
-}
-
-/*
- * Write to PCI(e) configuration space.
- *
- * @dev: Device to write to.
- * @offset: Offset to write at.
- */
-void
-pci_writel(struct pci_device *dev, uint32_t offset, uint32_t val)
-{
- if (access_method == PCI_ACCESS_CAM) {
- pci_cam_write(dev, offset, val);
- return;
- }
-
- panic("Invalid access method (%s())\n", __func__);
- __builtin_unreachable();
-}
-
-/*
- * Set command register bits.
- *
- * @dev: Device whose command register to modify.
- * @bits: Bits to set.
- */
-void
-pci_set_cmdreg(struct pci_device *dev, uint16_t bits)
-{
- uint32_t tmp;
-
- tmp = pci_readl(dev, 0x4) | bits;
- pci_writel(dev, 0x4, tmp);
-}
-
-struct pci_device *
-pci_get_device(struct pci_lookup lookup, uint16_t lookup_type)
-{
- struct pci_device *dev;
- uint16_t lookup_matches = 0;
-
- TAILQ_FOREACH(dev, &device_list, link) {
- if (__TEST(lookup_type, PCI_DEVICE_ID)) {
- /* Check device ID */
- if (lookup.device_id == dev->device_id)
- lookup_matches |= PCI_DEVICE_ID;
- }
-
- if (__TEST(lookup_type, PCI_VENDOR_ID)) {
- /* Check vendor ID */
- if (lookup.vendor_id == dev->vendor_id)
- lookup_matches |= PCI_VENDOR_ID;
- }
-
- if (__TEST(lookup_type, PCI_CLASS)) {
- /* Check PCI class */
- if (lookup.pci_class == dev->pci_class)
- lookup_matches |= PCI_CLASS;
- }
-
- if (__TEST(lookup_type, PCI_SUBCLASS)) {
- /* Check PCI subclass */
- if (lookup.pci_subclass == dev->pci_subclass)
- lookup_matches |= PCI_SUBCLASS;
- }
-
- if (lookup_type == lookup_matches) {
- /* We found the device! */
- return dev;
- }
- lookup_matches = 0;
- }
-
- return NULL;
-}
-
-int
-pci_init(void)
-{
- TAILQ_INIT(&device_list);
-
- pr_trace("Scanning each bus...\n");
-
- for (uint16_t i = 0; i < 256; ++i) {
- pci_scan_bus(i);
- }
-
- return 0;
-}
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