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-rw-r--r--clients/net-snk/kernel/driver/net_support.c534
1 files changed, 534 insertions, 0 deletions
diff --git a/clients/net-snk/kernel/driver/net_support.c b/clients/net-snk/kernel/driver/net_support.c
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--- /dev/null
+++ b/clients/net-snk/kernel/driver/net_support.c
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+/******************************************************************************
+ * Copyright (c) 2004, 2007 IBM Corporation
+ * All rights reserved.
+ * This program and the accompanying materials
+ * are made available under the terms of the BSD License
+ * which accompanies this distribution, and is available at
+ * http://www.opensource.org/licenses/bsd-license.php
+ *
+ * Contributors:
+ * IBM Corporation - initial implementation
+ *****************************************************************************/
+
+
+#include <pci.h>
+#include <net.h>
+#include <netdriver_int.h>
+#include <kernel.h>
+#include <rtas.h>
+#include <stdlib.h>
+#include <of.h>
+#include <types.h>
+
+extern int net_init(pci_config_t * pciconf, char *mac_addr);
+extern int net_term(pci_config_t * pciconf);
+extern int net_xmit(pci_config_t * pciconf, char *buffer, int len);
+extern int net_receive(pci_config_t * pciconf, char *buffer, int len);
+extern int net_ioctl(pci_config_t * conf, int request, void *data);
+extern int load_module(const char *, pci_config_t *);
+
+
+static char *mod_names[] = {
+ "net_e1000",
+ "net_bcm",
+ "net_nx203x",
+ "net_mcmal",
+ "net_spider",
+ 0
+};
+
+net_driver_t *
+find_net_driver(pci_config_t pci_conf)
+{
+ int rc;
+ int i = 0;
+ static net_driver_t module_net_driver;
+
+ /* Loop over module name */
+ while (mod_names[i]) {
+ rc = load_module(mod_names[i], &pci_conf);
+ if (rc == 0) {
+ module_net_driver.net_init = net_init;
+ module_net_driver.net_term = net_term;
+ module_net_driver.net_transmit = net_xmit;
+ module_net_driver.net_receive = net_receive;
+ module_net_driver.net_ioctl = net_ioctl;
+ return &module_net_driver;
+ }
+ i++;
+ }
+ return 0;
+}
+
+static phandle_t
+get_boot_device(void)
+{
+ static int nameprinted = 1;
+ char buf[1024];
+ phandle_t dev = of_finddevice("/chosen");
+
+ if (dev == -1) {
+ printk("/chosen not found\n");
+ dev = of_finddevice("/aliases");
+ if (dev == -1)
+ return dev;
+ printk("/aliases found, net=%s\n", buf);
+ of_getprop(dev, "net", buf, 1024);
+ } else
+ of_getprop(dev, "bootpath", buf, 1024);
+
+// FIXME: This printk is nice add to "Reading MAC from device" from netboot
+// However it is too hackish having "kernel" code finish the application
+// output line
+ if (!nameprinted++)
+ printk("%s: ", buf);
+
+ return of_finddevice(buf);
+}
+
+static void
+get_mac(char *mac)
+{
+ phandle_t net = get_boot_device();
+
+ if (net == -1)
+ return;
+
+ of_getprop(net, "local-mac-address", mac, 6);
+}
+
+void translate_address_dev(uint64_t *, phandle_t);
+
+/**
+ * get_puid walks up in the device tree until it finds a parent
+ * node without a reg property. get_puid is assuming that if the
+ * parent node has no reg property it has found the pci host bridge
+ *
+ * this is not the correct way to find PHBs but it seems to work
+ * for all our systems
+ *
+ * @param node the device for which to find the puid
+ *
+ * @return the puid or 0
+ */
+uint64_t
+get_puid(phandle_t node)
+{
+ uint64_t puid = 0;
+ uint64_t tmp = 0;
+ phandle_t curr_node = of_parent(node);
+ if (!curr_node)
+ /* no parent found */
+ return 0;
+ for (;;) {
+ puid = tmp;
+ if (of_getprop(curr_node, "reg", &tmp, 8) < 8) {
+ /* if the found PHB is not directly under
+ * root we need to translate the found address */
+ translate_address_dev(&puid, node);
+ return puid;
+ }
+ curr_node = of_parent(curr_node);
+ if (!curr_node)
+ return 0;
+ }
+ return 0;
+}
+
+/* Fill in the pci config structure from the device tree */
+int
+set_pci_config(pci_config_t * pci_config)
+{
+ unsigned char buf[1024];
+ int len, bar_nr;
+ unsigned int *assigned_ptr;
+ phandle_t net = get_boot_device();
+
+ if (net == -1)
+ return -1;
+ of_getprop(net, "vendor-id", &pci_config->vendor_id, 4);
+ of_getprop(net, "device-id", &pci_config->device_id, 4);
+ of_getprop(net, "revision-id", &pci_config->revision_id, 4);
+ of_getprop(net, "class-code", &pci_config->class_code, 4);
+ of_getprop(net, "interrupts", &pci_config->interrupt_line, 4);
+
+ len = of_getprop(net, "assigned-addresses", buf, 400);
+ if (len <= 0)
+ return -1;
+ assigned_ptr = (unsigned int *) &buf[0];
+ pci_config->bus = (assigned_ptr[0] & 0x00ff0000) >> 16;
+ pci_config->devfn = (assigned_ptr[0] & 0x0000ff00) >> 8;
+
+ while (len > 0) {
+ /* Fixme 64 bit bars */
+ bar_nr = ((assigned_ptr[0] & 0xff) - 0x10) / 4;
+ pci_config->bars[bar_nr].type =
+ (assigned_ptr[0] & 0x0f000000) >> 24;
+ pci_config->bars[bar_nr].addr = assigned_ptr[2];
+ pci_config->bars[bar_nr].size = assigned_ptr[4];
+ assigned_ptr += 5;
+ len -= 5 * sizeof(int);
+ }
+
+ pci_config->puid = get_puid(net);
+
+ return 0;
+}
+
+
+typedef struct {
+ pci_config_t pci_conf;
+ net_driver_t net_driv;
+
+ char mac_addr[6];
+ int running;
+} net_status_t;
+
+static net_status_t net_status;
+
+int
+init_net_driver()
+{
+ int result = 0;
+ net_driver_t *net_driver;
+
+ /* Find net device and initialize pci config */
+ if (set_pci_config(&net_status.pci_conf) == -1) {
+ printk(" No net device found \n");
+ return -1;
+ }
+
+ /* Get mac address from device tree */
+ get_mac(net_status.mac_addr);
+
+ /* Find net device driver */
+
+ net_driver = find_net_driver(net_status.pci_conf);
+ if (net_driver == 0) {
+ printk(" No net device driver found \n");
+ return -1;
+ }
+ net_status.net_driv = *net_driver;
+ /* Init net device driver */
+ result = net_status.net_driv.net_init(&net_status.pci_conf,
+ &net_status.mac_addr[0]);
+ if (result == -1) {
+ net_status.running = 0;
+ return -2;
+ } else {
+ net_status.running = 1;
+ }
+ return 0;
+}
+
+
+void
+term_net_driver()
+{
+ if (net_status.running == 1)
+ net_status.net_driv.net_term(&net_status.pci_conf);
+}
+
+
+int
+_socket(int domain, int type, int proto, char *mac_addr)
+{
+ static int first_time = 1;
+ if (first_time) {
+ switch (init_net_driver()) {
+ case -1:
+ return -1;
+ case -2:
+ return -2;
+ default:
+ break;
+ }
+ first_time = 0;
+ }
+
+ memcpy(mac_addr, &net_status.mac_addr[0], 6);
+ return 0;
+}
+
+
+long
+_recv(int fd, void *packet, int packet_len, int flags)
+{
+ return net_status.net_driv.net_receive(&net_status.pci_conf,
+ packet, packet_len);
+}
+
+
+long
+_sendto(int fd, void *packet, int packet_len, int flags,
+ void *sock_addr, int sock_addr_len)
+{
+ return net_status.net_driv.net_transmit(&net_status.pci_conf,
+ packet, packet_len);
+}
+
+long
+_send(int fd, void *packet, int packet_len, int flags)
+{
+ return net_status.net_driv.net_transmit(&net_status.pci_conf,
+ packet, packet_len);
+}
+
+long
+_ioctl(int fd, int request, void *data)
+{
+ net_driver_t *net_driver;
+
+ /* Find net device and initialize pci config */
+ if (set_pci_config(&net_status.pci_conf) == -1) {
+ printk(" No net device found \n");
+ return -1;
+ }
+
+ /* Find net device driver */
+
+ net_driver = find_net_driver(net_status.pci_conf);
+ if (net_driver == 0) {
+ printk(" No net device driver found \n");
+ return -1;
+ }
+ net_status.net_driv = *net_driver;
+
+ return net_status.net_driv.net_ioctl(&net_status.pci_conf,
+ request, data);
+}
+
+
+void *
+malloc_aligned(size_t size, int align)
+{
+ unsigned long p = (unsigned long) malloc(size + align - 1);
+ p = p + align - 1;
+ p = p & ~(align - 1);
+
+ return (void *) p;
+}
+
+#define CONFIG_SPACE 0
+#define IO_SPACE 1
+#define MEM_SPACE 2
+
+#define ASSIGNED_ADDRESS_PROPERTY 0
+#define REG_PROPERTY 1
+
+#define DEBUG_TRANSLATE_ADDRESS 0
+#if DEBUG_TRANSLATE_ADDRESS != 0
+#define DEBUG_TR(str...) printk(str)
+#else
+#define DEBUG_TR(str...)
+#endif
+
+/**
+ * pci_address_type tries to find the type for which a
+ * mapping should be done. This is PCI specific and is done by
+ * looking at the first 32bit of the phys-addr in
+ * assigned-addresses
+ *
+ * @param node the node of the device which requests
+ * translatation
+ * @param address the address which needs to be translated
+ * @param prop_type the type of the property to search in (either REG_PROPERTY or ASSIGNED_ADDRESS_PROPERTY)
+ * @return the corresponding type (config, i/o, mem)
+ */
+static int
+pci_address_type(phandle_t node, uint64_t address, uint8_t prop_type)
+{
+ char *prop_name = "assigned-addresses";
+ if (prop_type == REG_PROPERTY)
+ prop_name = "reg";
+ /* #address-cells */
+ const unsigned int nac = 3; //PCI
+ /* #size-cells */
+ const unsigned int nsc = 2; //PCI
+ /* up to 11 pairs of (phys-addr(3) size(2)) */
+ unsigned char buf[11 * (nac + nsc) * sizeof(int)];
+ unsigned int *assigned_ptr;
+ int result = -1;
+ int len;
+ len = of_getprop(node, prop_name, buf, 11 * (nac + nsc) * sizeof(int));
+ assigned_ptr = (unsigned int *) &buf[0];
+ while (len > 0) {
+ if ((prop_type == REG_PROPERTY)
+ && ((assigned_ptr[0] & 0xFF) != 0)) {
+ //BARs and Expansion ROM must be in assigned-addresses... so in reg
+ // we only look for those without config space offset set...
+ assigned_ptr += (nac + nsc);
+ len -= (nac + nsc) * sizeof(int);
+ continue;
+ }
+ DEBUG_TR("%s %x size %x\n", prop_name, assigned_ptr[2],
+ assigned_ptr[4]);
+ if (address >= assigned_ptr[2]
+ && address <= assigned_ptr[2] + assigned_ptr[4]) {
+ DEBUG_TR("found a match\n");
+ result = (assigned_ptr[0] & 0x03000000) >> 24;
+ break;
+ }
+ assigned_ptr += (nac + nsc);
+ len -= (nac + nsc) * sizeof(int);
+ }
+ /* this can only handle 32bit memory space and should be
+ * removed as soon as translations for 64bit are available */
+ return (result == 3) ? MEM_SPACE : result;
+}
+
+/**
+ * this is a hack which returns the lower 64 bit of any number of cells
+ * all the higher bits will silently discarded
+ * right now this works pretty good as long 64 bit addresses is all we want
+ *
+ * @param addr a pointer to the first address cell
+ * @param nc number of cells addr points to
+ * @return the lower 64 bit to which addr points
+ */
+static uint64_t
+get_dt_address(uint32_t *addr, uint32_t nc)
+{
+ uint64_t result = 0;
+ while (nc--)
+ result = (result << 32) | *(addr++);
+ return result;
+}
+
+/**
+ * this functions tries to find a mapping for the given address
+ * it assumes that if we have #address-cells == 3 that we are trying
+ * to do a PCI translation
+ *
+ * @param addr a pointer to the address that should be translated
+ * if a translation has been found the address will
+ * be modified
+ * @param type this is required for PCI devices to find the
+ * correct translation
+ * @param ranges this is one "range" containing the translation
+ * information (one range = nac + pnac + nsc)
+ * @param nac the OF property #address-cells
+ * @param nsc the OF property #size-cells
+ * @param pnac the OF property #address-cells from the parent node
+ * @return -1 if no translation was possible; else 0
+ */
+static int
+map_one_range(uint64_t *addr, int type, uint32_t *ranges, uint32_t nac,
+ uint32_t nsc, uint32_t pnac)
+{
+ long offset;
+ /* cm - child mapping */
+ /* pm - parent mapping */
+ uint64_t cm, size, pm;
+ /* only check for the type if nac == 3 (PCI) */
+ DEBUG_TR("type %x, nac %x\n", ranges[0], nac);
+ if (((ranges[0] & 0x03000000) >> 24) != type && nac == 3)
+ return -1;
+ /* okay, it is the same type let's see if we find a mapping */
+ size = get_dt_address(ranges + nac + pnac, nsc);
+ if (nac == 3) /* skip type if PCI */
+ cm = get_dt_address(ranges + 1, nac - 1);
+ else
+ cm = get_dt_address(ranges, nac);
+
+ DEBUG_TR("\t\tchild_mapping %lx\n", cm);
+ DEBUG_TR("\t\tsize %lx\n", size);
+ DEBUG_TR("\t\t*address %lx\n", (uint64_t) * addr);
+ if (cm + size <= (uint64_t) * addr || cm > (uint64_t) * addr)
+ /* it is not inside the mapping range */
+ return -1;
+ /* get the offset */
+ offset = *addr - cm;
+ /* and add the offset on the parent mapping */
+ if (pnac == 3) /* skip type if PCI */
+ pm = get_dt_address(ranges + nac + 1, pnac - 1);
+ else
+ pm = get_dt_address(ranges + nac, pnac);
+ DEBUG_TR("\t\tparent_mapping %lx\n", pm);
+ *addr = pm + offset;
+ DEBUG_TR("\t\t*address %lx\n", *addr);
+ return 0;
+}
+
+/**
+ * translate_address_dev tries to translate the device specific address
+ * to a host specific address by walking up in the device tree
+ *
+ * @param address a pointer to a 64 bit value which will be
+ * translated
+ * @param current_node phandle of the device from which the
+ * translation will be started
+ */
+void
+translate_address_dev(uint64_t *addr, phandle_t current_node)
+{
+ unsigned char buf[1024];
+ phandle_t parent;
+ unsigned int pnac;
+ unsigned int nac;
+ unsigned int nsc;
+ int addr_type;
+ int len;
+ unsigned int *ranges;
+ unsigned int one_range;
+ DEBUG_TR("translate address %lx, node: %lx\n", *addr, current_node);
+ of_getprop(current_node, "name", buf, 400);
+ DEBUG_TR("current node: %s\n", buf);
+ addr_type =
+ pci_address_type(current_node, *addr, ASSIGNED_ADDRESS_PROPERTY);
+ if (addr_type == -1) {
+ // check in "reg" property if not found in "assigned-addresses"
+ addr_type = pci_address_type(current_node, *addr, REG_PROPERTY);
+ }
+ DEBUG_TR("address_type %x\n", addr_type);
+ current_node = of_parent(current_node);
+ while (1) {
+ parent = of_parent(current_node);
+ if (!parent) {
+ DEBUG_TR("reached root node...\n");
+ break;
+ }
+ of_getprop(current_node, "#address-cells", &nac, 4);
+ of_getprop(current_node, "#size-cells", &nsc, 4);
+ of_getprop(parent, "#address-cells", &pnac, 4);
+ one_range = nac + pnac + nsc;
+ len = of_getprop(current_node, "ranges", buf, 400);
+ if (len < 0) {
+ DEBUG_TR("no 'ranges' property; not translatable\n");
+ return;
+ }
+ ranges = (unsigned int *) &buf[0];
+ while (len > 0) {
+ if (!map_one_range
+ ((uint64_t *) addr, addr_type, ranges, nac, nsc,
+ pnac))
+ /* after a successful mapping we stop
+ * going through the ranges */
+ break;
+ ranges += one_range;
+ len -= one_range * sizeof(int);
+ }
+ DEBUG_TR("address %lx\n", *addr);
+ of_getprop(current_node, "name", buf, 400);
+ DEBUG_TR("current node: %s\n", buf);
+ DEBUG_TR("\t#address-cells: %x\n", nac);
+ DEBUG_TR("\t#size-cells: %x\n", nsc);
+ of_getprop(parent, "name", buf, 400);
+ DEBUG_TR("parent node: %s\n", buf);
+ DEBUG_TR("\t#address-cells: %x\n", pnac);
+ current_node = parent;
+ }
+}
+
+/**
+ * translate_address tries to translate the device specific address
+ * of the boot device to a host specific address
+ *
+ * @param address a pointer to a 64 bit value which will be
+ * translated
+ */
+void
+translate_address(uint64_t *addr)
+{
+ translate_address_dev(addr, get_boot_device());
+}
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