summaryrefslogtreecommitdiff
path: root/libddekit/pci.c
diff options
context:
space:
mode:
Diffstat (limited to 'libddekit/pci.c')
-rw-r--r--libddekit/pci.c392
1 files changed, 392 insertions, 0 deletions
diff --git a/libddekit/pci.c b/libddekit/pci.c
new file mode 100644
index 00000000..35fb7aea
--- /dev/null
+++ b/libddekit/pci.c
@@ -0,0 +1,392 @@
+#include <l4/dde/ddekit/pci.h>
+#include <l4/dde/ddekit/printf.h>
+#include <l4/dde/ddekit/panic.h>
+#include <l4/dde/ddekit/memory.h>
+#include <l4/dde/ddekit/assert.h>
+
+#include <l4/generic_io/types.h>
+#include <l4/generic_io/libio.h>
+#include <l4/env/errno.h>
+#include <l4/log/l4log.h>
+
+#include "config.h"
+
+#define dbg_this 0
+
+#define MAX_PCI_DEVS 32
+
+/** PCI descriptor */
+typedef struct ddekit_pci_dev {
+ int bus; /**< bus ID */
+ int slot; /**< slot ID */
+ int func; /**< function */
+ l4io_pci_dev_t l4dev; /**< L4IO handle */
+ struct ddekit_pci_dev *next; /**< chaining info */
+} ddekit_pci_dev_t;
+
+static ddekit_pci_dev_t ddekit_pci_bus[MAX_PCI_DEVS];
+
+static inline int invalid_device(ddekit_pci_dev_t *d)
+{
+ return d->slot == -1;
+}
+
+
+/** Initialize DDEKit PCI module.
+ *
+ * \ingroup DDEKit_pci
+ *
+ * This function builds a list of devices by querying L4IO.
+ */
+void ddekit_pci_init(void)
+{
+ l4io_pdev_t start = 0;
+
+ int slots_found = 0;
+ int i;
+
+ /* Init device list */
+ for (i = 0; i < MAX_PCI_DEVS; i++)
+ ddekit_pci_bus[i].slot = -1;
+
+ while (1) {
+ l4io_pci_dev_t l4dev;
+ int err;
+
+ /* search next device */
+ err = l4io_pci_find_device(~0, ~0, start, &l4dev);
+ if (err) {
+ if (err == -L4_ENOTFOUND) {
+ LOGd(dbg_this, "no more pci devices");
+ } else {
+ LOGd(dbg_this, "error: scanning pci devices: %s (%d)", l4env_errstr(err), err);
+ }
+ break;
+ }
+
+ /* next search start from here */
+ start = l4dev.handle;
+
+ /* print info */
+
+ /* Pretend all our devices are chained to exactly one bus. */
+ ddekit_pci_bus[slots_found].bus = 0; /*l4dev.bus;*/
+ ddekit_pci_bus[slots_found].slot = slots_found;
+ ddekit_pci_bus[slots_found].func = 0;
+ ddekit_pci_bus[slots_found].l4dev = l4dev;
+
+ LOGd(dbg_this, "pcib_identify: found device (%x, %x, %x), mapped to (%x, %x, %x)",
+ l4dev.bus, l4dev.devfn >> 3, l4dev.devfn & 0x07,
+ ddekit_pci_bus[slots_found].bus,
+ ddekit_pci_bus[slots_found].slot,
+ ddekit_pci_bus[slots_found].func);
+
+ ++slots_found;
+ }
+}
+
+
+/**
+ * Get PCI device (bus, slot, func) for handle.
+ *
+ * \ingroup DDEKit_pci
+ */
+int ddekit_pci_get_device(int nr, int *bus, int *slot, int *func)
+{
+ ddekit_pci_dev_t *dev;
+
+ LOGd(dbg_this, "searching for dev #%d", nr);
+
+ if (nr >= 0 && nr < MAX_PCI_DEVS && !invalid_device(&ddekit_pci_bus[nr])) {
+ dev = &ddekit_pci_bus[nr];
+ *bus = dev->bus;
+ *slot = dev->slot;
+ *func = dev->func;
+ return 0;
+ }
+
+ return -1;
+}
+
+
+ddekit_pci_dev_t *ddekit_pci_find_device(int *bus, int *slot, int *func,
+ ddekit_pci_dev_t *start)
+{
+ Assert(bus);
+ Assert(slot);
+ Assert(func);
+
+ LOGd(dbg_this, "start %p (slot %d)", start, start ? start->slot : -1);
+ int idx = start ? start->slot + 1 : 0;
+
+ for ( ; idx < MAX_PCI_DEVS; ++idx) {
+ ddekit_pci_dev_t *dev = &ddekit_pci_bus[idx];
+ if (!invalid_device(dev) &&
+ (*bus == DDEKIT_PCI_ANY_ID || dev->bus == *bus) &&
+ (*slot == DDEKIT_PCI_ANY_ID || dev->slot == *slot) &&
+ (*func == DDEKIT_PCI_ANY_ID || dev->func == *func)) {
+ *bus = dev->bus;
+ *slot = dev->slot;
+ *func = dev->func;
+ return dev;
+ }
+ }
+
+ return NULL;
+}
+
+int ddekit_pci_read(int bus, int slot, int func, int pos, int len, ddekit_uint32_t *val)
+{
+ switch(len)
+ {
+ case 1:
+ return ddekit_pci_readb(bus, slot, func, pos, (ddekit_uint8_t *)val);
+ case 2:
+ return ddekit_pci_readw(bus, slot, func, pos, (ddekit_uint16_t *)val);
+ case 4:
+ return ddekit_pci_readl(bus, slot, func, pos, val);
+ }
+
+ return -1;
+}
+
+int ddekit_pci_write(int bus, int slot, int func, int pos, int len, ddekit_uint32_t val)
+{
+ switch(len)
+ {
+ case 1:
+ return ddekit_pci_writeb(bus, slot, func, pos, val);
+ case 2:
+ return ddekit_pci_writew(bus, slot, func, pos, val);
+ case 4:
+ return ddekit_pci_writel(bus, slot, func, pos, val);
+ }
+
+ return -1;
+}
+
+
+/** Find PCI device for a given (bus, slot, func) tuple.
+*
+* \ingroup DDEKit_pci
+ *
+ * This function is only used internally by the pci_{read,write}{b,l,w} functions.
+ * It was once called pci_find_device, but this caused confusion with the "real"
+ * find_device() functionality provided by L4IO and the Linux PCI subsystem.
+ */
+static inline ddekit_pci_dev_t *ddekit_pci_find_device_fixed(int bus, int slot, int func)
+{
+ return &ddekit_pci_bus[slot];
+}
+
+
+int ddekit_pci_readb (int bus, int slot, int func, int pos, ddekit_uint8_t *val)
+{
+ ddekit_pci_dev_t *dev = ddekit_pci_find_device_fixed(bus, slot, func);
+ if (dev)
+ return l4io_pci_readb_cfg(dev->l4dev.handle, pos, val);
+ else
+ return -1;
+}
+
+
+int ddekit_pci_readw (int bus, int slot, int func, int pos, ddekit_uint16_t *val)
+{
+ ddekit_pci_dev_t *dev = ddekit_pci_find_device_fixed(bus, slot, func);
+ if (dev)
+ return l4io_pci_readw_cfg(dev->l4dev.handle, pos, val);
+ else
+ return -1;
+}
+
+
+int ddekit_pci_readl (int bus, int slot, int func, int pos, ddekit_uint32_t *val)
+{
+ ddekit_pci_dev_t *dev = ddekit_pci_find_device_fixed(bus, slot, func);
+ if (dev)
+ return l4io_pci_readl_cfg(dev->l4dev.handle, pos, val);
+ else
+ return -1;
+}
+
+
+int ddekit_pci_writeb(int bus, int slot, int func, int pos, ddekit_uint8_t val)
+{
+ ddekit_pci_dev_t *dev = ddekit_pci_find_device_fixed(bus, slot, func);
+ if (dev)
+ return l4io_pci_writeb_cfg(dev->l4dev.handle, pos, val);
+ else
+ return -1;
+}
+
+
+int ddekit_pci_writew(int bus, int slot, int func, int pos, ddekit_uint16_t val)
+{
+ ddekit_pci_dev_t *dev = ddekit_pci_find_device_fixed(bus, slot, func);
+ if (dev)
+ return l4io_pci_writew_cfg(dev->l4dev.handle, pos, val);
+ else
+ return -1;
+}
+
+
+int ddekit_pci_writel(int bus, int slot, int func, int pos, ddekit_uint32_t val)
+{
+ ddekit_pci_dev_t *dev = ddekit_pci_find_device_fixed(bus, slot, func);
+ if (dev)
+ return l4io_pci_writel_cfg(dev->l4dev.handle, pos, val);
+ else
+ return -1;
+}
+
+int ddekit_pci_enable_device(struct ddekit_pci_dev *dev)
+{
+ return l4io_pci_enable(dev->l4dev.handle);
+}
+
+int ddekit_pci_disable_device(struct ddekit_pci_dev *dev)
+{
+ return l4io_pci_disable(dev->l4dev.handle);
+}
+
+/********************************************************************************
+ ** Accessor functions for the various kinds of information that are available **
+ ** from struct l4io_pci_dev (which is not handed through to the DDEs, because **
+ ** it still contains L4 types). **
+ ********************************************************************************/
+
+/**
+ * Get PCI device vendor ID.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+unsigned short ddekit_pci_get_vendor(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.vendor;
+}
+
+
+/**
+ * Get PCI device ID.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+unsigned short ddekit_pci_get_device_id(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.device;
+}
+
+
+/**
+ * Get PCI device subvendor ID.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+unsigned short ddekit_pci_get_sub_vendor(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.sub_vendor;
+}
+
+
+/**
+ * Get PCI device subdevice ID.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+unsigned short ddekit_pci_get_sub_device(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.sub_device;
+}
+
+
+/**
+ * Get PCI device class ID.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+unsigned ddekit_pci_get_dev_class(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.dev_class;
+}
+
+
+/**
+ * Get PCI device IRQ number.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+unsigned long ddekit_pci_get_irq(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.irq;
+}
+
+
+/**
+ * Get PCI device name.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+char *ddekit_pci_get_name(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.name;
+}
+
+
+/**
+ * Get PCI device slot name.
+ *
+ * \param dev device
+ *
+ * \ingroup DDEKit_pci
+ */
+char *ddekit_pci_get_slot_name(struct ddekit_pci_dev *dev)
+{
+ return dev->l4dev.slot_name;
+}
+
+
+/**
+ * Get PCI device resource at index.
+ *
+ * \param dev device
+ * \param idx resource index
+ *
+ * \ingroup DDEKit_pci
+ */
+ddekit_pci_res_t *ddekit_pci_get_resource(struct ddekit_pci_dev *dev, unsigned int idx)
+{
+ if (idx > L4IO_PCIDEV_RES)
+ return NULL;
+
+ return (ddekit_pci_res_t *)(&(dev->l4dev.res[idx]));
+}
+
+
+/**
+ * Set PCI bus mastering for device.
+ *
+ * \ingroup DDEKit_pci
+ */
+void ddekit_pci_set_master(struct ddekit_pci_dev *dev)
+{
+ l4io_pci_set_master(dev->l4dev.handle);
+}
+
+int ddekit_pci_irq_enable(int bus, int slot, int func, int pin, int *irq)
+{
+ return 0;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-17 10:44:37 +0000