mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-06 00:26:40 +07:00
1296 lines
32 KiB
C
1296 lines
32 KiB
C
/*
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* Driver for the Solos PCI ADSL2+ card, designed to support Linux by
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* Traverse Technologies -- http://www.traverse.com.au/
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* Xrio Limited -- http://www.xrio.com/
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*
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*
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* Copyright © 2008 Traverse Technologies
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* Copyright © 2008 Intel Corporation
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*
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* Authors: Nathan Williams <nathan@traverse.com.au>
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* David Woodhouse <dwmw2@infradead.org>
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* Treker Chen <treker@xrio.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#define DEBUG
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#define VERBOSE_DEBUG
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#include <linux/interrupt.h>
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#include <linux/module.h>
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#include <linux/kernel.h>
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#include <linux/errno.h>
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#include <linux/ioport.h>
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#include <linux/types.h>
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#include <linux/pci.h>
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#include <linux/atm.h>
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#include <linux/atmdev.h>
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#include <linux/skbuff.h>
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#include <linux/sysfs.h>
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#include <linux/device.h>
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#include <linux/kobject.h>
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#include <linux/firmware.h>
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#include <linux/ctype.h>
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#include <linux/swab.h>
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#define VERSION "0.07"
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#define PTAG "solos-pci"
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#define CONFIG_RAM_SIZE 128
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#define FLAGS_ADDR 0x7C
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#define IRQ_EN_ADDR 0x78
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#define FPGA_VER 0x74
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#define IRQ_CLEAR 0x70
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#define WRITE_FLASH 0x6C
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#define PORTS 0x68
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#define FLASH_BLOCK 0x64
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#define FLASH_BUSY 0x60
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#define FPGA_MODE 0x5C
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#define FLASH_MODE 0x58
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#define TX_DMA_ADDR(port) (0x40 + (4 * (port)))
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#define RX_DMA_ADDR(port) (0x30 + (4 * (port)))
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#define DATA_RAM_SIZE 32768
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#define BUF_SIZE 4096
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#define FPGA_PAGE 528 /* FPGA flash page size*/
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#define SOLOS_PAGE 512 /* Solos flash page size*/
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#define FPGA_BLOCK (FPGA_PAGE * 8) /* FPGA flash block size*/
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#define SOLOS_BLOCK (SOLOS_PAGE * 8) /* Solos flash block size*/
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#define RX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2)
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#define TX_BUF(card, nr) ((card->buffers) + (nr)*BUF_SIZE*2 + BUF_SIZE)
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#define RX_DMA_SIZE 2048
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static int reset = 0;
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static int atmdebug = 0;
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static int firmware_upgrade = 0;
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static int fpga_upgrade = 0;
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struct pkt_hdr {
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__le16 size;
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__le16 vpi;
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__le16 vci;
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__le16 type;
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};
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struct solos_skb_cb {
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struct atm_vcc *vcc;
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uint32_t dma_addr;
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};
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#define SKB_CB(skb) ((struct solos_skb_cb *)skb->cb)
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#define PKT_DATA 0
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#define PKT_COMMAND 1
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#define PKT_POPEN 3
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#define PKT_PCLOSE 4
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#define PKT_STATUS 5
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struct solos_card {
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void __iomem *config_regs;
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void __iomem *buffers;
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int nr_ports;
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int tx_mask;
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struct pci_dev *dev;
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struct atm_dev *atmdev[4];
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struct tasklet_struct tlet;
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spinlock_t tx_lock;
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spinlock_t tx_queue_lock;
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spinlock_t cli_queue_lock;
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spinlock_t param_queue_lock;
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struct list_head param_queue;
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struct sk_buff_head tx_queue[4];
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struct sk_buff_head cli_queue[4];
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struct sk_buff *tx_skb[4];
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struct sk_buff *rx_skb[4];
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wait_queue_head_t param_wq;
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wait_queue_head_t fw_wq;
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int using_dma;
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};
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struct solos_param {
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struct list_head list;
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pid_t pid;
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int port;
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struct sk_buff *response;
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};
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#define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
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MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
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MODULE_DESCRIPTION("Solos PCI driver");
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MODULE_VERSION(VERSION);
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MODULE_LICENSE("GPL");
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MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
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MODULE_PARM_DESC(atmdebug, "Print ATM data");
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MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
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MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
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module_param(reset, int, 0444);
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module_param(atmdebug, int, 0644);
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module_param(firmware_upgrade, int, 0444);
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module_param(fpga_upgrade, int, 0444);
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static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
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struct atm_vcc *vcc);
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static uint32_t fpga_tx(struct solos_card *);
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static irqreturn_t solos_irq(int irq, void *dev_id);
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static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
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static int list_vccs(int vci);
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static void release_vccs(struct atm_dev *dev);
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static int atm_init(struct solos_card *);
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static void atm_remove(struct solos_card *);
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static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
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static void solos_bh(unsigned long);
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static int print_buffer(struct sk_buff *buf);
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static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
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{
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if (vcc->pop)
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vcc->pop(vcc, skb);
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else
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dev_kfree_skb_any(skb);
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}
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static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
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struct solos_card *card = atmdev->dev_data;
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struct solos_param prm;
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struct sk_buff *skb;
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struct pkt_hdr *header;
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int buflen;
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buflen = strlen(attr->attr.name) + 10;
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skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
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if (!skb) {
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dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
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return -ENOMEM;
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}
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header = (void *)skb_put(skb, sizeof(*header));
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buflen = snprintf((void *)&header[1], buflen - 1,
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"L%05d\n%s\n", current->pid, attr->attr.name);
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skb_put(skb, buflen);
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header->size = cpu_to_le16(buflen);
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header->vpi = cpu_to_le16(0);
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header->vci = cpu_to_le16(0);
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header->type = cpu_to_le16(PKT_COMMAND);
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prm.pid = current->pid;
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prm.response = NULL;
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prm.port = SOLOS_CHAN(atmdev);
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spin_lock_irq(&card->param_queue_lock);
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list_add(&prm.list, &card->param_queue);
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spin_unlock_irq(&card->param_queue_lock);
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fpga_queue(card, prm.port, skb, NULL);
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wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
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spin_lock_irq(&card->param_queue_lock);
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list_del(&prm.list);
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spin_unlock_irq(&card->param_queue_lock);
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if (!prm.response)
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return -EIO;
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buflen = prm.response->len;
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memcpy(buf, prm.response->data, buflen);
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kfree_skb(prm.response);
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return buflen;
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}
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static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
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struct solos_card *card = atmdev->dev_data;
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struct solos_param prm;
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struct sk_buff *skb;
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struct pkt_hdr *header;
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int buflen;
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ssize_t ret;
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buflen = strlen(attr->attr.name) + 11 + count;
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skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
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if (!skb) {
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dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
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return -ENOMEM;
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}
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header = (void *)skb_put(skb, sizeof(*header));
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buflen = snprintf((void *)&header[1], buflen - 1,
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"L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
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skb_put(skb, buflen);
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header->size = cpu_to_le16(buflen);
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header->vpi = cpu_to_le16(0);
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header->vci = cpu_to_le16(0);
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header->type = cpu_to_le16(PKT_COMMAND);
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prm.pid = current->pid;
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prm.response = NULL;
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prm.port = SOLOS_CHAN(atmdev);
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spin_lock_irq(&card->param_queue_lock);
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list_add(&prm.list, &card->param_queue);
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spin_unlock_irq(&card->param_queue_lock);
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fpga_queue(card, prm.port, skb, NULL);
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wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
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spin_lock_irq(&card->param_queue_lock);
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list_del(&prm.list);
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spin_unlock_irq(&card->param_queue_lock);
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skb = prm.response;
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if (!skb)
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return -EIO;
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buflen = skb->len;
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/* Sometimes it has a newline, sometimes it doesn't. */
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if (skb->data[buflen - 1] == '\n')
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buflen--;
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if (buflen == 2 && !strncmp(skb->data, "OK", 2))
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ret = count;
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else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
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ret = -EIO;
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else {
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/* We know we have enough space allocated for this; we allocated
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it ourselves */
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skb->data[buflen] = 0;
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dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
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skb->data);
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ret = -EIO;
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}
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kfree_skb(skb);
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return ret;
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}
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static char *next_string(struct sk_buff *skb)
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{
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int i = 0;
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char *this = skb->data;
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for (i = 0; i < skb->len; i++) {
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if (this[i] == '\n') {
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this[i] = 0;
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skb_pull(skb, i + 1);
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return this;
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}
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if (!isprint(this[i]))
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return NULL;
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}
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return NULL;
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}
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/*
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* Status packet has fields separated by \n, starting with a version number
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* for the information therein. Fields are....
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*
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* packet version
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* RxBitRate (version >= 1)
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* TxBitRate (version >= 1)
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* State (version >= 1)
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* LocalSNRMargin (version >= 1)
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* LocalLineAttn (version >= 1)
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*/
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static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
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{
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char *str, *end, *state_str, *snr, *attn;
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int ver, rate_up, rate_down;
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if (!card->atmdev[port])
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return -ENODEV;
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str = next_string(skb);
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if (!str)
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return -EIO;
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ver = simple_strtol(str, NULL, 10);
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if (ver < 1) {
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dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
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ver);
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return -EIO;
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}
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str = next_string(skb);
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if (!str)
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return -EIO;
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if (!strcmp(str, "ERROR")) {
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dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
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port);
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return 0;
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}
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rate_down = simple_strtol(str, &end, 10);
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if (*end)
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return -EIO;
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str = next_string(skb);
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if (!str)
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return -EIO;
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rate_up = simple_strtol(str, &end, 10);
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if (*end)
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return -EIO;
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state_str = next_string(skb);
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if (!state_str)
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return -EIO;
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/* Anything but 'Showtime' is down */
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if (strcmp(state_str, "Showtime")) {
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card->atmdev[port]->signal = ATM_PHY_SIG_LOST;
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release_vccs(card->atmdev[port]);
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dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
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return 0;
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}
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snr = next_string(skb);
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if (!str)
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return -EIO;
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attn = next_string(skb);
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if (!attn)
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return -EIO;
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dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
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port, state_str, rate_down/1000, rate_up/1000,
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snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
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card->atmdev[port]->link_rate = rate_down / 424;
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card->atmdev[port]->signal = ATM_PHY_SIG_FOUND;
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return 0;
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}
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static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
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{
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struct solos_param *prm;
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unsigned long flags;
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int cmdpid;
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int found = 0;
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if (skb->len < 7)
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return 0;
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if (skb->data[0] != 'L' || !isdigit(skb->data[1]) ||
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!isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
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!isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
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skb->data[6] != '\n')
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return 0;
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cmdpid = simple_strtol(&skb->data[1], NULL, 10);
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spin_lock_irqsave(&card->param_queue_lock, flags);
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list_for_each_entry(prm, &card->param_queue, list) {
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if (prm->port == port && prm->pid == cmdpid) {
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prm->response = skb;
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skb_pull(skb, 7);
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wake_up(&card->param_wq);
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found = 1;
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break;
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}
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}
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spin_unlock_irqrestore(&card->param_queue_lock, flags);
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return found;
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}
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static ssize_t console_show(struct device *dev, struct device_attribute *attr,
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char *buf)
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{
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struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
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struct solos_card *card = atmdev->dev_data;
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struct sk_buff *skb;
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spin_lock(&card->cli_queue_lock);
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skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
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spin_unlock(&card->cli_queue_lock);
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if(skb == NULL)
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return sprintf(buf, "No data.\n");
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memcpy(buf, skb->data, skb->len);
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dev_dbg(&card->dev->dev, "len: %d\n", skb->len);
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kfree_skb(skb);
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return skb->len;
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}
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static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
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{
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struct sk_buff *skb;
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struct pkt_hdr *header;
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if (size > (BUF_SIZE - sizeof(*header))) {
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dev_dbg(&card->dev->dev, "Command is too big. Dropping request\n");
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return 0;
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}
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skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
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if (!skb) {
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dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
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return 0;
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}
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header = (void *)skb_put(skb, sizeof(*header));
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header->size = cpu_to_le16(size);
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header->vpi = cpu_to_le16(0);
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header->vci = cpu_to_le16(0);
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header->type = cpu_to_le16(PKT_COMMAND);
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memcpy(skb_put(skb, size), buf, size);
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fpga_queue(card, dev, skb, NULL);
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return 0;
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}
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static ssize_t console_store(struct device *dev, struct device_attribute *attr,
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const char *buf, size_t count)
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{
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struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
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struct solos_card *card = atmdev->dev_data;
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int err;
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err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
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return err?:count;
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}
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static DEVICE_ATTR(console, 0644, console_show, console_store);
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|
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#define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
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#define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
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|
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#include "solos-attrlist.c"
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|
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#undef SOLOS_ATTR_RO
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#undef SOLOS_ATTR_RW
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|
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#define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
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|
#define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
|
|
|
|
static struct attribute *solos_attrs[] = {
|
|
#include "solos-attrlist.c"
|
|
NULL
|
|
};
|
|
|
|
static struct attribute_group solos_attr_group = {
|
|
.attrs = solos_attrs,
|
|
.name = "parameters",
|
|
};
|
|
|
|
static int flash_upgrade(struct solos_card *card, int chip)
|
|
{
|
|
const struct firmware *fw;
|
|
const char *fw_name;
|
|
uint32_t data32 = 0;
|
|
int blocksize = 0;
|
|
int numblocks = 0;
|
|
int offset;
|
|
|
|
if (chip == 0) {
|
|
fw_name = "solos-FPGA.bin";
|
|
blocksize = FPGA_BLOCK;
|
|
} else {
|
|
fw_name = "solos-Firmware.bin";
|
|
blocksize = SOLOS_BLOCK;
|
|
}
|
|
|
|
if (request_firmware(&fw, fw_name, &card->dev->dev))
|
|
return -ENOENT;
|
|
|
|
dev_info(&card->dev->dev, "Flash upgrade starting\n");
|
|
|
|
numblocks = fw->size / blocksize;
|
|
dev_info(&card->dev->dev, "Firmware size: %zd\n", fw->size);
|
|
dev_info(&card->dev->dev, "Number of blocks: %d\n", numblocks);
|
|
|
|
dev_info(&card->dev->dev, "Changing FPGA to Update mode\n");
|
|
iowrite32(1, card->config_regs + FPGA_MODE);
|
|
data32 = ioread32(card->config_regs + FPGA_MODE);
|
|
|
|
/* Set mode to Chip Erase */
|
|
dev_info(&card->dev->dev, "Set FPGA Flash mode to %s Chip Erase\n",
|
|
chip?"Solos":"FPGA");
|
|
iowrite32((chip * 2), card->config_regs + FLASH_MODE);
|
|
|
|
|
|
iowrite32(1, card->config_regs + WRITE_FLASH);
|
|
wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
|
|
|
|
for (offset = 0; offset < fw->size; offset += blocksize) {
|
|
int i;
|
|
|
|
/* Clear write flag */
|
|
iowrite32(0, card->config_regs + WRITE_FLASH);
|
|
|
|
/* Set mode to Block Write */
|
|
/* dev_info(&card->dev->dev, "Set FPGA Flash mode to Block Write\n"); */
|
|
iowrite32(((chip * 2) + 1), card->config_regs + FLASH_MODE);
|
|
|
|
/* Copy block to buffer, swapping each 16 bits */
|
|
for(i = 0; i < blocksize; i += 4) {
|
|
uint32_t word = swahb32p((uint32_t *)(fw->data + offset + i));
|
|
iowrite32(word, RX_BUF(card, 3) + i);
|
|
}
|
|
|
|
/* Specify block number and then trigger flash write */
|
|
iowrite32(offset / blocksize, card->config_regs + FLASH_BLOCK);
|
|
iowrite32(1, card->config_regs + WRITE_FLASH);
|
|
wait_event(card->fw_wq, !ioread32(card->config_regs + FLASH_BUSY));
|
|
}
|
|
|
|
release_firmware(fw);
|
|
iowrite32(0, card->config_regs + WRITE_FLASH);
|
|
iowrite32(0, card->config_regs + FPGA_MODE);
|
|
iowrite32(0, card->config_regs + FLASH_MODE);
|
|
dev_info(&card->dev->dev, "Returning FPGA to Data mode\n");
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t solos_irq(int irq, void *dev_id)
|
|
{
|
|
struct solos_card *card = dev_id;
|
|
int handled = 1;
|
|
|
|
iowrite32(0, card->config_regs + IRQ_CLEAR);
|
|
|
|
/* If we're up and running, just kick the tasklet to process TX/RX */
|
|
if (card->atmdev[0])
|
|
tasklet_schedule(&card->tlet);
|
|
else
|
|
wake_up(&card->fw_wq);
|
|
|
|
return IRQ_RETVAL(handled);
|
|
}
|
|
|
|
void solos_bh(unsigned long card_arg)
|
|
{
|
|
struct solos_card *card = (void *)card_arg;
|
|
uint32_t card_flags;
|
|
uint32_t rx_done = 0;
|
|
int port;
|
|
|
|
/*
|
|
* Since fpga_tx() is going to need to read the flags under its lock,
|
|
* it can return them to us so that we don't have to hit PCI MMIO
|
|
* again for the same information
|
|
*/
|
|
card_flags = fpga_tx(card);
|
|
|
|
for (port = 0; port < card->nr_ports; port++) {
|
|
if (card_flags & (0x10 << port)) {
|
|
struct pkt_hdr _hdr, *header;
|
|
struct sk_buff *skb;
|
|
struct atm_vcc *vcc;
|
|
int size;
|
|
|
|
if (card->using_dma) {
|
|
skb = card->rx_skb[port];
|
|
card->rx_skb[port] = NULL;
|
|
|
|
pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
|
|
RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
|
|
|
|
header = (void *)skb->data;
|
|
size = le16_to_cpu(header->size);
|
|
skb_put(skb, size + sizeof(*header));
|
|
skb_pull(skb, sizeof(*header));
|
|
} else {
|
|
header = &_hdr;
|
|
|
|
rx_done |= 0x10 << port;
|
|
|
|
memcpy_fromio(header, RX_BUF(card, port), sizeof(*header));
|
|
|
|
size = le16_to_cpu(header->size);
|
|
|
|
skb = alloc_skb(size + 1, GFP_ATOMIC);
|
|
if (!skb) {
|
|
if (net_ratelimit())
|
|
dev_warn(&card->dev->dev, "Failed to allocate sk_buff for RX\n");
|
|
continue;
|
|
}
|
|
|
|
memcpy_fromio(skb_put(skb, size),
|
|
RX_BUF(card, port) + sizeof(*header),
|
|
size);
|
|
}
|
|
if (atmdebug) {
|
|
dev_info(&card->dev->dev, "Received: device %d\n", port);
|
|
dev_info(&card->dev->dev, "size: %d VPI: %d VCI: %d\n",
|
|
size, le16_to_cpu(header->vpi),
|
|
le16_to_cpu(header->vci));
|
|
print_buffer(skb);
|
|
}
|
|
|
|
switch (le16_to_cpu(header->type)) {
|
|
case PKT_DATA:
|
|
vcc = find_vcc(card->atmdev[port], le16_to_cpu(header->vpi),
|
|
le16_to_cpu(header->vci));
|
|
if (!vcc) {
|
|
if (net_ratelimit())
|
|
dev_warn(&card->dev->dev, "Received packet for unknown VCI.VPI %d.%d on port %d\n",
|
|
le16_to_cpu(header->vci), le16_to_cpu(header->vpi),
|
|
port);
|
|
continue;
|
|
}
|
|
atm_charge(vcc, skb->truesize);
|
|
vcc->push(vcc, skb);
|
|
atomic_inc(&vcc->stats->rx);
|
|
break;
|
|
|
|
case PKT_STATUS:
|
|
if (process_status(card, port, skb) &&
|
|
net_ratelimit()) {
|
|
dev_warn(&card->dev->dev, "Bad status packet of %d bytes on port %d:\n", skb->len, port);
|
|
print_buffer(skb);
|
|
}
|
|
dev_kfree_skb_any(skb);
|
|
break;
|
|
|
|
case PKT_COMMAND:
|
|
default: /* FIXME: Not really, surely? */
|
|
if (process_command(card, port, skb))
|
|
break;
|
|
spin_lock(&card->cli_queue_lock);
|
|
if (skb_queue_len(&card->cli_queue[port]) > 10) {
|
|
if (net_ratelimit())
|
|
dev_warn(&card->dev->dev, "Dropping console response on port %d\n",
|
|
port);
|
|
dev_kfree_skb_any(skb);
|
|
} else
|
|
skb_queue_tail(&card->cli_queue[port], skb);
|
|
spin_unlock(&card->cli_queue_lock);
|
|
break;
|
|
}
|
|
}
|
|
/* Allocate RX skbs for any ports which need them */
|
|
if (card->using_dma && card->atmdev[port] &&
|
|
!card->rx_skb[port]) {
|
|
struct sk_buff *skb = alloc_skb(RX_DMA_SIZE, GFP_ATOMIC);
|
|
if (skb) {
|
|
SKB_CB(skb)->dma_addr =
|
|
pci_map_single(card->dev, skb->data,
|
|
RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
|
|
iowrite32(SKB_CB(skb)->dma_addr,
|
|
card->config_regs + RX_DMA_ADDR(port));
|
|
card->rx_skb[port] = skb;
|
|
} else {
|
|
if (net_ratelimit())
|
|
dev_warn(&card->dev->dev, "Failed to allocate RX skb");
|
|
|
|
/* We'll have to try again later */
|
|
tasklet_schedule(&card->tlet);
|
|
}
|
|
}
|
|
}
|
|
if (rx_done)
|
|
iowrite32(rx_done, card->config_regs + FLAGS_ADDR);
|
|
|
|
return;
|
|
}
|
|
|
|
static struct atm_vcc *find_vcc(struct atm_dev *dev, short vpi, int vci)
|
|
{
|
|
struct hlist_head *head;
|
|
struct atm_vcc *vcc = NULL;
|
|
struct hlist_node *node;
|
|
struct sock *s;
|
|
|
|
read_lock(&vcc_sklist_lock);
|
|
head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
|
|
sk_for_each(s, node, head) {
|
|
vcc = atm_sk(s);
|
|
if (vcc->dev == dev && vcc->vci == vci &&
|
|
vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE)
|
|
goto out;
|
|
}
|
|
vcc = NULL;
|
|
out:
|
|
read_unlock(&vcc_sklist_lock);
|
|
return vcc;
|
|
}
|
|
|
|
static int list_vccs(int vci)
|
|
{
|
|
struct hlist_head *head;
|
|
struct atm_vcc *vcc;
|
|
struct hlist_node *node;
|
|
struct sock *s;
|
|
int num_found = 0;
|
|
int i;
|
|
|
|
read_lock(&vcc_sklist_lock);
|
|
if (vci != 0){
|
|
head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
|
|
sk_for_each(s, node, head) {
|
|
num_found ++;
|
|
vcc = atm_sk(s);
|
|
printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
|
|
vcc->dev->number,
|
|
vcc->vpi,
|
|
vcc->vci);
|
|
}
|
|
} else {
|
|
for(i = 0; i < VCC_HTABLE_SIZE; i++){
|
|
head = &vcc_hash[i];
|
|
sk_for_each(s, node, head) {
|
|
num_found ++;
|
|
vcc = atm_sk(s);
|
|
printk(KERN_DEBUG "Device: %d Vpi: %d Vci: %d\n",
|
|
vcc->dev->number,
|
|
vcc->vpi,
|
|
vcc->vci);
|
|
}
|
|
}
|
|
}
|
|
read_unlock(&vcc_sklist_lock);
|
|
return num_found;
|
|
}
|
|
|
|
static void release_vccs(struct atm_dev *dev)
|
|
{
|
|
int i;
|
|
|
|
write_lock_irq(&vcc_sklist_lock);
|
|
for (i = 0; i < VCC_HTABLE_SIZE; i++) {
|
|
struct hlist_head *head = &vcc_hash[i];
|
|
struct hlist_node *node, *tmp;
|
|
struct sock *s;
|
|
struct atm_vcc *vcc;
|
|
|
|
sk_for_each_safe(s, node, tmp, head) {
|
|
vcc = atm_sk(s);
|
|
if (vcc->dev == dev) {
|
|
vcc_release_async(vcc, -EPIPE);
|
|
sk_del_node_init(s);
|
|
}
|
|
}
|
|
}
|
|
write_unlock_irq(&vcc_sklist_lock);
|
|
}
|
|
|
|
|
|
static int popen(struct atm_vcc *vcc)
|
|
{
|
|
struct solos_card *card = vcc->dev->dev_data;
|
|
struct sk_buff *skb;
|
|
struct pkt_hdr *header;
|
|
|
|
if (vcc->qos.aal != ATM_AAL5) {
|
|
dev_warn(&card->dev->dev, "Unsupported ATM type %d\n",
|
|
vcc->qos.aal);
|
|
return -EINVAL;
|
|
}
|
|
|
|
skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
|
|
if (!skb && net_ratelimit()) {
|
|
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
|
|
return -ENOMEM;
|
|
}
|
|
header = (void *)skb_put(skb, sizeof(*header));
|
|
|
|
header->size = cpu_to_le16(0);
|
|
header->vpi = cpu_to_le16(vcc->vpi);
|
|
header->vci = cpu_to_le16(vcc->vci);
|
|
header->type = cpu_to_le16(PKT_POPEN);
|
|
|
|
fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
|
|
|
|
set_bit(ATM_VF_ADDR, &vcc->flags);
|
|
set_bit(ATM_VF_READY, &vcc->flags);
|
|
list_vccs(0);
|
|
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void pclose(struct atm_vcc *vcc)
|
|
{
|
|
struct solos_card *card = vcc->dev->dev_data;
|
|
struct sk_buff *skb;
|
|
struct pkt_hdr *header;
|
|
|
|
skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
|
|
if (!skb) {
|
|
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
|
|
return;
|
|
}
|
|
header = (void *)skb_put(skb, sizeof(*header));
|
|
|
|
header->size = cpu_to_le16(0);
|
|
header->vpi = cpu_to_le16(vcc->vpi);
|
|
header->vci = cpu_to_le16(vcc->vci);
|
|
header->type = cpu_to_le16(PKT_PCLOSE);
|
|
|
|
fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, NULL);
|
|
|
|
clear_bit(ATM_VF_ADDR, &vcc->flags);
|
|
clear_bit(ATM_VF_READY, &vcc->flags);
|
|
|
|
return;
|
|
}
|
|
|
|
static int print_buffer(struct sk_buff *buf)
|
|
{
|
|
int len,i;
|
|
char msg[500];
|
|
char item[10];
|
|
|
|
len = buf->len;
|
|
for (i = 0; i < len; i++){
|
|
if(i % 8 == 0)
|
|
sprintf(msg, "%02X: ", i);
|
|
|
|
sprintf(item,"%02X ",*(buf->data + i));
|
|
strcat(msg, item);
|
|
if(i % 8 == 7) {
|
|
sprintf(item, "\n");
|
|
strcat(msg, item);
|
|
printk(KERN_DEBUG "%s", msg);
|
|
}
|
|
}
|
|
if (i % 8 != 0) {
|
|
sprintf(item, "\n");
|
|
strcat(msg, item);
|
|
printk(KERN_DEBUG "%s", msg);
|
|
}
|
|
printk(KERN_DEBUG "\n");
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
|
|
struct atm_vcc *vcc)
|
|
{
|
|
int old_len;
|
|
unsigned long flags;
|
|
|
|
SKB_CB(skb)->vcc = vcc;
|
|
|
|
spin_lock_irqsave(&card->tx_queue_lock, flags);
|
|
old_len = skb_queue_len(&card->tx_queue[port]);
|
|
skb_queue_tail(&card->tx_queue[port], skb);
|
|
if (!old_len)
|
|
card->tx_mask |= (1 << port);
|
|
spin_unlock_irqrestore(&card->tx_queue_lock, flags);
|
|
|
|
/* Theoretically we could just schedule the tasklet here, but
|
|
that introduces latency we don't want -- it's noticeable */
|
|
if (!old_len)
|
|
fpga_tx(card);
|
|
}
|
|
|
|
static uint32_t fpga_tx(struct solos_card *card)
|
|
{
|
|
uint32_t tx_pending, card_flags;
|
|
uint32_t tx_started = 0;
|
|
struct sk_buff *skb;
|
|
struct atm_vcc *vcc;
|
|
unsigned char port;
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&card->tx_lock, flags);
|
|
|
|
card_flags = ioread32(card->config_regs + FLAGS_ADDR);
|
|
/*
|
|
* The queue lock is required for _writing_ to tx_mask, but we're
|
|
* OK to read it here without locking. The only potential update
|
|
* that we could race with is in fpga_queue() where it sets a bit
|
|
* for a new port... but it's going to call this function again if
|
|
* it's doing that, anyway.
|
|
*/
|
|
tx_pending = card->tx_mask & ~card_flags;
|
|
|
|
for (port = 0; tx_pending; tx_pending >>= 1, port++) {
|
|
if (tx_pending & 1) {
|
|
struct sk_buff *oldskb = card->tx_skb[port];
|
|
if (oldskb)
|
|
pci_unmap_single(card->dev, SKB_CB(oldskb)->dma_addr,
|
|
oldskb->len, PCI_DMA_TODEVICE);
|
|
|
|
spin_lock(&card->tx_queue_lock);
|
|
skb = skb_dequeue(&card->tx_queue[port]);
|
|
if (!skb)
|
|
card->tx_mask &= ~(1 << port);
|
|
spin_unlock(&card->tx_queue_lock);
|
|
|
|
if (skb && !card->using_dma) {
|
|
memcpy_toio(TX_BUF(card, port), skb->data, skb->len);
|
|
tx_started |= 1 << port;
|
|
oldskb = skb; /* We're done with this skb already */
|
|
} else if (skb && card->using_dma) {
|
|
SKB_CB(skb)->dma_addr = pci_map_single(card->dev, skb->data,
|
|
skb->len, PCI_DMA_TODEVICE);
|
|
iowrite32(SKB_CB(skb)->dma_addr,
|
|
card->config_regs + TX_DMA_ADDR(port));
|
|
}
|
|
|
|
if (!oldskb)
|
|
continue;
|
|
|
|
/* Clean up and free oldskb now it's gone */
|
|
if (atmdebug) {
|
|
dev_info(&card->dev->dev, "Transmitted: port %d\n",
|
|
port);
|
|
print_buffer(oldskb);
|
|
}
|
|
|
|
vcc = SKB_CB(oldskb)->vcc;
|
|
|
|
if (vcc) {
|
|
atomic_inc(&vcc->stats->tx);
|
|
solos_pop(vcc, oldskb);
|
|
} else
|
|
dev_kfree_skb_irq(oldskb);
|
|
|
|
}
|
|
}
|
|
/* For non-DMA TX, write the 'TX start' bit for all four ports simultaneously */
|
|
if (tx_started)
|
|
iowrite32(tx_started, card->config_regs + FLAGS_ADDR);
|
|
|
|
spin_unlock_irqrestore(&card->tx_lock, flags);
|
|
return card_flags;
|
|
}
|
|
|
|
static int psend(struct atm_vcc *vcc, struct sk_buff *skb)
|
|
{
|
|
struct solos_card *card = vcc->dev->dev_data;
|
|
struct pkt_hdr *header;
|
|
int pktlen;
|
|
|
|
pktlen = skb->len;
|
|
if (pktlen > (BUF_SIZE - sizeof(*header))) {
|
|
dev_warn(&card->dev->dev, "Length of PDU is too large. Dropping PDU.\n");
|
|
solos_pop(vcc, skb);
|
|
return 0;
|
|
}
|
|
|
|
if (!skb_clone_writable(skb, sizeof(*header))) {
|
|
int expand_by = 0;
|
|
int ret;
|
|
|
|
if (skb_headroom(skb) < sizeof(*header))
|
|
expand_by = sizeof(*header) - skb_headroom(skb);
|
|
|
|
ret = pskb_expand_head(skb, expand_by, 0, GFP_ATOMIC);
|
|
if (ret) {
|
|
dev_warn(&card->dev->dev, "pskb_expand_head failed.\n");
|
|
solos_pop(vcc, skb);
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
header = (void *)skb_push(skb, sizeof(*header));
|
|
|
|
/* This does _not_ include the size of the header */
|
|
header->size = cpu_to_le16(pktlen);
|
|
header->vpi = cpu_to_le16(vcc->vpi);
|
|
header->vci = cpu_to_le16(vcc->vci);
|
|
header->type = cpu_to_le16(PKT_DATA);
|
|
|
|
fpga_queue(card, SOLOS_CHAN(vcc->dev), skb, vcc);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct atmdev_ops fpga_ops = {
|
|
.open = popen,
|
|
.close = pclose,
|
|
.ioctl = NULL,
|
|
.getsockopt = NULL,
|
|
.setsockopt = NULL,
|
|
.send = psend,
|
|
.send_oam = NULL,
|
|
.phy_put = NULL,
|
|
.phy_get = NULL,
|
|
.change_qos = NULL,
|
|
.proc_read = NULL,
|
|
.owner = THIS_MODULE
|
|
};
|
|
|
|
static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
|
|
{
|
|
int err;
|
|
uint16_t fpga_ver;
|
|
uint8_t major_ver, minor_ver;
|
|
uint32_t data32;
|
|
struct solos_card *card;
|
|
|
|
card = kzalloc(sizeof(*card), GFP_KERNEL);
|
|
if (!card)
|
|
return -ENOMEM;
|
|
|
|
card->dev = dev;
|
|
init_waitqueue_head(&card->fw_wq);
|
|
init_waitqueue_head(&card->param_wq);
|
|
|
|
err = pci_enable_device(dev);
|
|
if (err) {
|
|
dev_warn(&dev->dev, "Failed to enable PCI device\n");
|
|
goto out;
|
|
}
|
|
|
|
err = pci_set_dma_mask(dev, DMA_32BIT_MASK);
|
|
if (err) {
|
|
dev_warn(&dev->dev, "Failed to set 32-bit DMA mask\n");
|
|
goto out;
|
|
}
|
|
|
|
err = pci_request_regions(dev, "solos");
|
|
if (err) {
|
|
dev_warn(&dev->dev, "Failed to request regions\n");
|
|
goto out;
|
|
}
|
|
|
|
card->config_regs = pci_iomap(dev, 0, CONFIG_RAM_SIZE);
|
|
if (!card->config_regs) {
|
|
dev_warn(&dev->dev, "Failed to ioremap config registers\n");
|
|
goto out_release_regions;
|
|
}
|
|
card->buffers = pci_iomap(dev, 1, DATA_RAM_SIZE);
|
|
if (!card->buffers) {
|
|
dev_warn(&dev->dev, "Failed to ioremap data buffers\n");
|
|
goto out_unmap_config;
|
|
}
|
|
|
|
if (reset) {
|
|
iowrite32(1, card->config_regs + FPGA_MODE);
|
|
data32 = ioread32(card->config_regs + FPGA_MODE);
|
|
|
|
iowrite32(0, card->config_regs + FPGA_MODE);
|
|
data32 = ioread32(card->config_regs + FPGA_MODE);
|
|
}
|
|
|
|
data32 = ioread32(card->config_regs + FPGA_VER);
|
|
fpga_ver = (data32 & 0x0000FFFF);
|
|
major_ver = ((data32 & 0xFF000000) >> 24);
|
|
minor_ver = ((data32 & 0x00FF0000) >> 16);
|
|
dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
|
|
major_ver, minor_ver, fpga_ver);
|
|
|
|
if (0 && fpga_ver > 27)
|
|
card->using_dma = 1;
|
|
else {
|
|
/* Set RX empty flag for all ports */
|
|
iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
|
|
}
|
|
|
|
data32 = ioread32(card->config_regs + PORTS);
|
|
card->nr_ports = (data32 & 0x000000FF);
|
|
|
|
pci_set_drvdata(dev, card);
|
|
|
|
tasklet_init(&card->tlet, solos_bh, (unsigned long)card);
|
|
spin_lock_init(&card->tx_lock);
|
|
spin_lock_init(&card->tx_queue_lock);
|
|
spin_lock_init(&card->cli_queue_lock);
|
|
spin_lock_init(&card->param_queue_lock);
|
|
INIT_LIST_HEAD(&card->param_queue);
|
|
|
|
err = request_irq(dev->irq, solos_irq, IRQF_SHARED,
|
|
"solos-pci", card);
|
|
if (err) {
|
|
dev_dbg(&card->dev->dev, "Failed to request interrupt IRQ: %d\n", dev->irq);
|
|
goto out_unmap_both;
|
|
}
|
|
|
|
iowrite32(1, card->config_regs + IRQ_EN_ADDR);
|
|
|
|
if (fpga_upgrade)
|
|
flash_upgrade(card, 0);
|
|
|
|
if (firmware_upgrade)
|
|
flash_upgrade(card, 1);
|
|
|
|
err = atm_init(card);
|
|
if (err)
|
|
goto out_free_irq;
|
|
|
|
return 0;
|
|
|
|
out_free_irq:
|
|
iowrite32(0, card->config_regs + IRQ_EN_ADDR);
|
|
free_irq(dev->irq, card);
|
|
tasklet_kill(&card->tlet);
|
|
|
|
out_unmap_both:
|
|
pci_set_drvdata(dev, NULL);
|
|
pci_iounmap(dev, card->config_regs);
|
|
out_unmap_config:
|
|
pci_iounmap(dev, card->buffers);
|
|
out_release_regions:
|
|
pci_release_regions(dev);
|
|
out:
|
|
kfree(card);
|
|
return err;
|
|
}
|
|
|
|
static int atm_init(struct solos_card *card)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < card->nr_ports; i++) {
|
|
struct sk_buff *skb;
|
|
struct pkt_hdr *header;
|
|
|
|
skb_queue_head_init(&card->tx_queue[i]);
|
|
skb_queue_head_init(&card->cli_queue[i]);
|
|
|
|
card->atmdev[i] = atm_dev_register("solos-pci", &fpga_ops, -1, NULL);
|
|
if (!card->atmdev[i]) {
|
|
dev_err(&card->dev->dev, "Could not register ATM device %d\n", i);
|
|
atm_remove(card);
|
|
return -ENODEV;
|
|
}
|
|
if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
|
|
dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
|
|
if (sysfs_create_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group))
|
|
dev_err(&card->dev->dev, "Could not register parameter group for ATM device %d\n", i);
|
|
|
|
dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
|
|
|
|
card->atmdev[i]->ci_range.vpi_bits = 8;
|
|
card->atmdev[i]->ci_range.vci_bits = 16;
|
|
card->atmdev[i]->dev_data = card;
|
|
card->atmdev[i]->phy_data = (void *)(unsigned long)i;
|
|
card->atmdev[i]->signal = ATM_PHY_SIG_UNKNOWN;
|
|
|
|
skb = alloc_skb(sizeof(*header), GFP_ATOMIC);
|
|
if (!skb) {
|
|
dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
|
|
continue;
|
|
}
|
|
|
|
header = (void *)skb_put(skb, sizeof(*header));
|
|
|
|
header->size = cpu_to_le16(0);
|
|
header->vpi = cpu_to_le16(0);
|
|
header->vci = cpu_to_le16(0);
|
|
header->type = cpu_to_le16(PKT_STATUS);
|
|
|
|
fpga_queue(card, i, skb, NULL);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void atm_remove(struct solos_card *card)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < card->nr_ports; i++) {
|
|
if (card->atmdev[i]) {
|
|
struct sk_buff *skb;
|
|
|
|
dev_info(&card->dev->dev, "Unregistering ATM device %d\n", card->atmdev[i]->number);
|
|
|
|
sysfs_remove_group(&card->atmdev[i]->class_dev.kobj, &solos_attr_group);
|
|
atm_dev_deregister(card->atmdev[i]);
|
|
|
|
skb = card->rx_skb[i];
|
|
if (skb) {
|
|
pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
|
|
RX_DMA_SIZE, PCI_DMA_FROMDEVICE);
|
|
dev_kfree_skb(skb);
|
|
}
|
|
skb = card->tx_skb[i];
|
|
if (skb) {
|
|
pci_unmap_single(card->dev, SKB_CB(skb)->dma_addr,
|
|
skb->len, PCI_DMA_TODEVICE);
|
|
dev_kfree_skb(skb);
|
|
}
|
|
while ((skb = skb_dequeue(&card->tx_queue[i])))
|
|
dev_kfree_skb(skb);
|
|
|
|
}
|
|
}
|
|
}
|
|
|
|
static void fpga_remove(struct pci_dev *dev)
|
|
{
|
|
struct solos_card *card = pci_get_drvdata(dev);
|
|
|
|
/* Disable IRQs */
|
|
iowrite32(0, card->config_regs + IRQ_EN_ADDR);
|
|
|
|
/* Reset FPGA */
|
|
iowrite32(1, card->config_regs + FPGA_MODE);
|
|
(void)ioread32(card->config_regs + FPGA_MODE);
|
|
|
|
atm_remove(card);
|
|
|
|
free_irq(dev->irq, card);
|
|
tasklet_kill(&card->tlet);
|
|
|
|
/* Release device from reset */
|
|
iowrite32(0, card->config_regs + FPGA_MODE);
|
|
(void)ioread32(card->config_regs + FPGA_MODE);
|
|
|
|
pci_iounmap(dev, card->buffers);
|
|
pci_iounmap(dev, card->config_regs);
|
|
|
|
pci_release_regions(dev);
|
|
pci_disable_device(dev);
|
|
|
|
pci_set_drvdata(dev, NULL);
|
|
kfree(card);
|
|
}
|
|
|
|
static struct pci_device_id fpga_pci_tbl[] __devinitdata = {
|
|
{ 0x10ee, 0x0300, PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
|
|
{ 0, }
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(pci,fpga_pci_tbl);
|
|
|
|
static struct pci_driver fpga_driver = {
|
|
.name = "solos",
|
|
.id_table = fpga_pci_tbl,
|
|
.probe = fpga_probe,
|
|
.remove = fpga_remove,
|
|
};
|
|
|
|
|
|
static int __init solos_pci_init(void)
|
|
{
|
|
printk(KERN_INFO "Solos PCI Driver Version %s\n", VERSION);
|
|
return pci_register_driver(&fpga_driver);
|
|
}
|
|
|
|
static void __exit solos_pci_exit(void)
|
|
{
|
|
pci_unregister_driver(&fpga_driver);
|
|
printk(KERN_INFO "Solos PCI Driver %s Unloaded\n", VERSION);
|
|
}
|
|
|
|
module_init(solos_pci_init);
|
|
module_exit(solos_pci_exit);
|