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solos: Handle attribute show/store in kernel more sanely
There are still a _lot_ of attributes, but for at least the basic ones we want to be able to get/set them from the kernel. Especially the ones we want to inform the ATM core about (link state, speed). Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This commit is contained in:
David Woodhouse
parent
316bea7936
commit
01e2ffac7d
@ -38,6 +38,8 @@
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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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@ -91,11 +93,23 @@ struct solos_card {
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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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wait_queue_head_t param_wq;
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wait_queue_head_t fw_wq;
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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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wait_queue_head_t wq;
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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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@ -131,6 +145,168 @@ static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
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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(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(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 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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@ -195,6 +371,8 @@ static ssize_t console_store(struct device *dev, struct device_attribute *attr,
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}
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static DEVICE_ATTR(console, 0644, console_show, console_store);
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static DEVICE_ATTR(OperationalMode, 0444, solos_param_show, NULL);
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static DEVICE_ATTR(AutoStart, 0644, solos_param_show, solos_param_store);
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static int flash_upgrade(struct solos_card *card, int chip)
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{
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@ -351,6 +529,8 @@ void solos_bh(unsigned long card_arg)
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case PKT_COMMAND:
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default: /* FIXME: Not really, surely? */
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if (process_command(card, port, skb))
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break;
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spin_lock(&card->cli_queue_lock);
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if (skb_queue_len(&card->cli_queue[port]) > 10) {
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if (net_ratelimit())
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@ -671,6 +851,7 @@ static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
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card->dev = dev;
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init_waitqueue_head(&card->fw_wq);
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init_waitqueue_head(&card->param_wq);
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err = pci_enable_device(dev);
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if (err) {
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@ -722,6 +903,8 @@ static int fpga_probe(struct pci_dev *dev, const struct pci_device_id *id)
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spin_lock_init(&card->tx_lock);
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spin_lock_init(&card->tx_queue_lock);
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spin_lock_init(&card->cli_queue_lock);
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spin_lock_init(&card->param_queue_lock);
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INIT_LIST_HEAD(&card->param_queue);
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/*
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// Set Loopback mode
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@ -804,6 +987,10 @@ static int atm_init(struct solos_card *card)
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}
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if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_console))
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dev_err(&card->dev->dev, "Could not register console for ATM device %d\n", i);
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if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_OperationalMode))
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dev_err(&card->dev->dev, "Could not register opmode attr for ATM device %d\n", i);
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if (device_create_file(&card->atmdev[i]->class_dev, &dev_attr_AutoStart))
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dev_err(&card->dev->dev, "Could not register autostart attr for ATM device %d\n", i);
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dev_info(&card->dev->dev, "Registered ATM device %d\n", card->atmdev[i]->number);
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