Merge tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Don't destroy user event fields when removal fails

   User event fields are destroyed before the event is removed from
   visibility. But that can fail leaving the still visible event with no
   fields. Move the destroying of the fields to after the event is
   successfully removed from visibility.

 - Initialize function graph state is fork before calling
   copy_exec_state()

   For non-CLONE_VM forks, copy_exec_state() allocates a new
   task_exec_state. If that allocation fails, ftrace_graph_exit_task()
   will free the tasks ret_stack pointer. Since that pointer is still
   using the parent's ret_stack, it mistakenly frees the parent's
   pointer too.

   Call ftrace_graph_init() on the task first which will NULL out the
   new tasks's ret_stack and if the copy fails, it will not free
   anything.

 - Remove FGRAPH_MAX_INDEX

   The macro FGRAPH_MAX_INDEX was added but never used. Remove it.

 - Save ent_size in function graph printing of nested functions

   The function graph tracer needs to look at the next event to see if
   the next event is the return of the current function entry. If it is,
   it prints a single line:

	ktime_get();

   Otherwise it prints it like a nested function:

	tick_nohz_irq_exit() {
	    ktime_get();
	    kcpustat_irq_exit();
	}

   In order to look at the next event, it must save the current event so
   that it has the information to print from it. It saves the event in
   the iterator descriptor called "ent". What it doesn't save is the
   ent_size of the event which is now used to know if the function graph
   arguments are to be printed. The peek doesn't save the size so the
   size used happens to be that of the size of the last event that was
   seen.

   Save the entry event size in the iterator descriptor so that the
   correct size is used.

 - Fix several errors with freeing data in the histogram code

   The histogram code had a lot of leaked or or incorrect accounting
   when failures happen. Correct them.

 - Fix histogram regression of .percent and .graph modifiers

   Up until 6.3 histogram values could have "percent" or "graph"
   modifiers that changed how they were printed. But a change that added
   restricting histograms values from being strings, stack traces and
   other modifiers inadvertently prevented them from using the percent
   and graph modifiers, which were legal use cases for values.

   Put back the percent and graph modifiers.

 - Fix various typos in the comments

 - Set the trace_clock before initializing a histogram with clock
   argument

   The histogram API allows the user to specific which trace clock to
   use via a "clock=" string. The histogram is set up first before the
   clock is checked. If the passed in clock is not valid, it exits
   without fully fixing up the histogram leaving it on the list and a
   use-after-free can trigger.

   Update the clock argument first and if it fails then exit gracefully
   before the histogram trigger is placed on any lists.

 - Restore :mod: trailer after parsing in ftrace_set_clr_event

   The function ftrace_set_clr_event() modifies the parse string and
   needs to put it back to what was passed in. It searches for ":mod:"
   via a strsep() but fails to put back the first ':' in the string.

   Add back the ':' in the passed in string.

 - Take trace_array reference when opening a tracer options file

   The options files are dynamically created and some tracers add their
   own options. When a tracer adds their own list of options, the
   trace_array holding them has an array to hold the list of options for
   each tracer. This array increases in size via a krealloc(), and the
   new entry gets a newly allocated array to hold the options of the new
   tracer being added.

   The element in each entry of the tracer's option array holds a
   pointer back to the trace_array, a pointer to the tracer it is
   associated to, a pointer to the flags of the option.

   The issue is that these arrays are freed when the trace_array is
   freed when its instance it represents is removed from the instances
   directory. There's a race that an open of one of these options files
   can happen when the instance is being removed.

   Add a new helper function to be called by the open function of the
   options file to iterate all existing trace_arrays under a lock and
   find the one that has the given option element in one of it's tracer
   arrays. If found, then update the associated trace_array's reference
   counter to keep it from being freed. If not found, have the open call
   return -ENODEV.

 - Disable interrupts when acquiring the lock in rb_wake_up_waiters()

   The function rb_wake_up_waiters() assumes it will be called in
   interrupt context and does not disable irqs when taking
   cpu_buffer->reader_lock, which can be called in hard interrupt
   context. The issue is in PREEMPT_RT, this function is called in
   thread context leaving this lock open to a deadlock.

   Take the lock with interrupts disabled.

 - Use rcu_assign_pointer() for tmp_ops filter hash

   The tmp_ops used in update_ftrace_direct_mod() assigns its
   filter_hash field directly, but that field is annotated as __rcu and
   sparse complains. Assign it with rcu_assign_pointer()

 - Fix use-after-free in enable_trigger_private_data_free()

   The trace_event_call is accessed through the event_trigger_data's
   trace_event_file pointer to put the trace_event_call on freeing. The
   issue is that the trace_event_file data may have been freed already
   causing a use-after-free. Add a field to the event_trigger_data that
   points directly to the trace_event_call so that it can decrement its
   reference directly without needing to go through the
   trace_event_file.

 - Fix accounting of buffer data remote headers

   trace_buffer_desc_size() and trace_remote_alloc_buffer() undercount
   the number of pages is needed for the asked for size as it doesn't
   take into account the meta data on each page. Add a helper function
   to do the calculation properly and use that in these functions.

 - Catch nr_page_va overflow in ring_buffer_desc sizing

   The number of pages per remote ring buffer is capped by
   ring_buffer_desc::nr_page_va (32 bits). A buffer_size large enough to
   overflow that field would silently allocate a descriptor smaller than
   what was asked for.

 - Do not resize the subbuf order if any per_cpu buffer is disabled

   The mmapping of ring buffers disables resizing the subbuffers, but it
   is done per-cpu whereas the subbuf size change is done for all the
   per_cpu buffers under the buffer->mutex. It could change the size of
   some while the mapping is happening on others. Have the resize of the
   subbuf order check all the per_cpu buffers under the lock to see if
   any of them is disabled before starting and causing an inconsistency
   between buffers that are being mapped.

* tag 'trace-v7.3-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace: (25 commits)
  ring-buffer: Check resize_disabled before publishing the new subbuf order
  tracing/remotes: Catch nr_page_va overflow in ring_buffer_desc sizing
  tracing/remotes: Account for ring buffer page header in size calculation
  tracing: Don't dereference trace_event_file in deferred trigger free
  ftrace: Use rcu_assign_pointer() for tmp_ops filter hash
  ring-buffer: Acquire the lock with irqsave in rb_wake_up_waiters()
  tracing: Take trace_array reference when opening a tracer options file
  tracing: Fix ring_buffer_read_page_size() kernel-doc
  tracing: Restore :mod: trailer after parsing in ftrace_set_clr_event()
  tracing: Fix memory corruption from a "STACKTRACE" histogram key
  tracing: Fix memory corruption from the histogram stacktrace modifier
  tracing: Undo the registration when enabling the histogram trigger fails
  tracing: Take the reference before publishing the named histogram trigger
  tracing: Set the trace clock before registering the histogram trigger
  tracing: Fix typo "preceeded" in comment
  tracing: Fix typo "availabe" in comment
  tracing: Let histogram values keep the percent and graph modifiers
  tracing: Keep the entry count when the histogram stats allocation fails
  tracing: Free histogram the field rejected for a bad modifier
  tracing: Free histogram the var ref when its initialization fails
  ...

4 files changed, 1603 insertions, 0 deletions

diff --git a/drivers/atm/Kconfig b/drivers/atm/Kconfig
new file mode 100644
index 000000000..cb1dd7789
--- /dev/null
+++ b/drivers/atm/Kconfig
@@ -0,0 +1,25 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# ATM device configuration
+#
+
+menuconfig ATM_DRIVERS
+	bool "ATM drivers"
+	depends on NETDEVICES && ATM
+	default y
+	help
+	  Say Y here to get to see options for Asynchronous Transfer Mode
+	  device drivers. This option alone does not add any kernel code.
+
+	  If you say N, all options in this submenu will be skipped and disabled.
+
+if ATM_DRIVERS && NETDEVICES && ATM
+
+config ATM_SOLOS
+	tristate "Solos ADSL2+ PCI Multiport card driver"
+	depends on PCI
+	select FW_LOADER
+	help
+	  Support for the Solos multiport ADSL2+ card.
+
+endif # ATM
diff --git a/drivers/atm/Makefile b/drivers/atm/Makefile
new file mode 100644
index 000000000..b95125a0b
--- /dev/null
+++ b/drivers/atm/Makefile
@@ -0,0 +1,3 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_ATM_SOLOS)		+= solos-pci.o
diff --git a/drivers/atm/solos-attrlist.c b/drivers/atm/solos-attrlist.c
new file mode 100644
index 000000000..1830d1b86
--- /dev/null
+++ b/drivers/atm/solos-attrlist.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0
+SOLOS_ATTR_RO(DriverVersion)
+SOLOS_ATTR_RO(APIVersion)
+SOLOS_ATTR_RO(FirmwareVersion)
+SOLOS_ATTR_RO(Version)
+// SOLOS_ATTR_RO(DspVersion)
+// SOLOS_ATTR_RO(CommonHandshake)
+SOLOS_ATTR_RO(Connected)
+SOLOS_ATTR_RO(OperationalMode)
+SOLOS_ATTR_RO(State)
+SOLOS_ATTR_RO(Watchdog)
+SOLOS_ATTR_RO(OperationProgress)
+SOLOS_ATTR_RO(LastFailed)
+SOLOS_ATTR_RO(TxBitRate)
+SOLOS_ATTR_RO(RxBitRate)
+// SOLOS_ATTR_RO(DeltACTATPds)
+// SOLOS_ATTR_RO(DeltACTATPus)
+SOLOS_ATTR_RO(TxATTNDR)
+SOLOS_ATTR_RO(RxATTNDR)
+SOLOS_ATTR_RO(AnnexType)
+SOLOS_ATTR_RO(GeneralFailure)
+SOLOS_ATTR_RO(InterleaveDpDn)
+SOLOS_ATTR_RO(InterleaveDpUp)
+SOLOS_ATTR_RO(RSCorrectedErrorsDn)
+SOLOS_ATTR_RO(RSUnCorrectedErrorsDn)
+SOLOS_ATTR_RO(RSCorrectedErrorsUp)
+SOLOS_ATTR_RO(RSUnCorrectedErrorsUp)
+SOLOS_ATTR_RO(InterleaveRDn)
+SOLOS_ATTR_RO(InterleaveRUp)
+SOLOS_ATTR_RO(BisRDn)
+SOLOS_ATTR_RO(BisRUp)
+SOLOS_ATTR_RO(INPdown)
+SOLOS_ATTR_RO(INPup)
+SOLOS_ATTR_RO(ShowtimeStart)
+SOLOS_ATTR_RO(ATURVendor)
+SOLOS_ATTR_RO(ATUCCountry)
+SOLOS_ATTR_RO(ATURANSIRev)
+SOLOS_ATTR_RO(ATURANSISTD)
+SOLOS_ATTR_RO(ATUCANSIRev)
+SOLOS_ATTR_RO(ATUCANSIId)
+SOLOS_ATTR_RO(ATUCANSISTD)
+SOLOS_ATTR_RO(DataBoost)
+SOLOS_ATTR_RO(LocalITUCountryCode)
+SOLOS_ATTR_RO(LocalSEF)
+SOLOS_ATTR_RO(LocalEndLOS)
+SOLOS_ATTR_RO(LocalSNRMargin)
+SOLOS_ATTR_RO(LocalLineAttn)
+SOLOS_ATTR_RO(RawAttn)
+SOLOS_ATTR_RO(LocalTxPower)
+SOLOS_ATTR_RO(RemoteTxPower)
+SOLOS_ATTR_RO(RemoteSEF)
+SOLOS_ATTR_RO(RemoteLOS)
+SOLOS_ATTR_RO(RemoteLineAttn)
+SOLOS_ATTR_RO(RemoteSNRMargin)
+SOLOS_ATTR_RO(LineUpCount)
+SOLOS_ATTR_RO(SRACnt)
+SOLOS_ATTR_RO(SRACntUp)
+SOLOS_ATTR_RO(ProfileStatus)
+SOLOS_ATTR_RW(Action)
+SOLOS_ATTR_RW(ActivateLine)
+SOLOS_ATTR_RO(LineStatus)
+SOLOS_ATTR_RW(HostControl)
+SOLOS_ATTR_RW(AutoStart)
+SOLOS_ATTR_RW(Failsafe)
+SOLOS_ATTR_RW(ShowtimeLed)
+SOLOS_ATTR_RW(Retrain)
+SOLOS_ATTR_RW(Defaults)
+SOLOS_ATTR_RW(LineMode)
+SOLOS_ATTR_RW(Profile)
+SOLOS_ATTR_RW(DetectNoise)
+SOLOS_ATTR_RW(BisAForceSNRMarginDn)
+SOLOS_ATTR_RW(BisMForceSNRMarginDn)
+SOLOS_ATTR_RW(BisAMaxMargin)
+SOLOS_ATTR_RW(BisMMaxMargin)
+SOLOS_ATTR_RW(AnnexAForceSNRMarginDn)
+SOLOS_ATTR_RW(AnnexAMaxMargin)
+SOLOS_ATTR_RW(AnnexMMaxMargin)
+SOLOS_ATTR_RO(SupportedAnnexes)
+SOLOS_ATTR_RO(Status)
+SOLOS_ATTR_RO(TotalStart)
+SOLOS_ATTR_RO(RecentShowtimeStart)
+SOLOS_ATTR_RO(TotalRxBlocks)
+SOLOS_ATTR_RO(TotalTxBlocks)
diff --git a/drivers/atm/solos-pci.c b/drivers/atm/solos-pci.c
new file mode 100644
index 000000000..fc0e91a10
--- /dev/null
+++ b/drivers/atm/solos-pci.c
@@ -0,0 +1,1492 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Driver for the Solos PCI ADSL2+ card, designed to support Linux by
+ *  Traverse Technologies -- https://www.traverse.com.au/
+ *  Xrio Limited          -- http://www.xrio.com/
+ *
+ * Copyright © 2008 Traverse Technologies
+ * Copyright © 2008 Intel Corporation
+ *
+ * Authors: Nathan Williams <nathan@traverse.com.au>
+ *          David Woodhouse <dwmw2@infradead.org>
+ *          Treker Chen <treker@xrio.com>
+ */
+
+#define DEBUG
+#define VERBOSE_DEBUG
+
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/ioport.h>
+#include <linux/types.h>
+#include <linux/pci.h>
+#include <linux/atm.h>
+#include <linux/atmdev.h>
+#include <linux/skbuff.h>
+#include <linux/sysfs.h>
+#include <linux/device.h>
+#include <linux/kobject.h>
+#include <linux/firmware.h>
+#include <linux/ctype.h>
+#include <linux/swab.h>
+#include <linux/slab.h>
+
+#define VERSION "1.04"
+#define DRIVER_VERSION 0x01
+#define PTAG "solos-pci"
+
+#define CONFIG_RAM_SIZE	128
+#define FLAGS_ADDR	0x7C
+#define IRQ_EN_ADDR	0x78
+#define FPGA_VER	0x74
+#define IRQ_CLEAR	0x70
+#define WRITE_FLASH	0x6C
+#define PORTS		0x68
+#define FLASH_BLOCK	0x64
+#define FLASH_BUSY	0x60
+#define FPGA_MODE	0x5C
+#define FLASH_MODE	0x58
+#define GPIO_STATUS	0x54
+#define DRIVER_VER	0x50
+#define TX_DMA_ADDR(port)	(0x40 + (4 * (port)))
+#define RX_DMA_ADDR(port)	(0x30 + (4 * (port)))
+
+#define DATA_RAM_SIZE	32768
+#define BUF_SIZE	2048
+#define OLD_BUF_SIZE	4096 /* For FPGA versions <= 2*/
+/* Old boards use ATMEL AD45DB161D flash */
+#define ATMEL_FPGA_PAGE	528 /* FPGA flash page size*/
+#define ATMEL_SOLOS_PAGE	512 /* Solos flash page size*/
+#define ATMEL_FPGA_BLOCK	(ATMEL_FPGA_PAGE * 8) /* FPGA block size*/
+#define ATMEL_SOLOS_BLOCK	(ATMEL_SOLOS_PAGE * 8) /* Solos block size*/
+/* Current boards use M25P/M25PE SPI flash */
+#define SPI_FLASH_BLOCK	(256 * 64)
+
+#define RX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2)
+#define TX_BUF(card, nr) ((card->buffers) + (nr)*(card->buffer_size)*2 + (card->buffer_size))
+#define FLASH_BUF ((card->buffers) + 4*(card->buffer_size)*2)
+
+#define RX_DMA_SIZE	2048
+
+#define FPGA_VERSION(a,b) (((a) << 8) + (b))
+#define LEGACY_BUFFERS	2
+#define DMA_SUPPORTED	4
+
+static int reset = 0;
+static int atmdebug = 0;
+static int firmware_upgrade = 0;
+static int fpga_upgrade = 0;
+static int db_firmware_upgrade = 0;
+static int db_fpga_upgrade = 0;
+
+struct pkt_hdr {
+	__le16 size;
+	__le16 vpi;
+	__le16 vci;
+	__le16 type;
+};
+
+struct solos_skb_cb {
+	struct atm_vcc *vcc;
+	uint32_t dma_addr;
+};
+
+
+#define SKB_CB(skb)		((struct solos_skb_cb *)skb->cb)
+
+#define PKT_DATA	0
+#define PKT_COMMAND	1
+#define PKT_POPEN	3
+#define PKT_PCLOSE	4
+#define PKT_STATUS	5
+
+struct solos_card {
+	void __iomem *config_regs;
+	void __iomem *buffers;
+	int nr_ports;
+	int tx_mask;
+	struct pci_dev *dev;
+	struct atm_dev *atmdev[4];
+	struct tasklet_struct tlet;
+	spinlock_t tx_lock;
+	spinlock_t tx_queue_lock;
+	spinlock_t cli_queue_lock;
+	spinlock_t param_queue_lock;
+	struct list_head param_queue;
+	struct sk_buff_head tx_queue[4];
+	struct sk_buff_head cli_queue[4];
+	struct sk_buff *tx_skb[4];
+	struct sk_buff *rx_skb[4];
+	unsigned char *dma_bounce;
+	wait_queue_head_t param_wq;
+	wait_queue_head_t fw_wq;
+	int using_dma;
+	int dma_alignment;
+	int fpga_version;
+	int buffer_size;
+	int atmel_flash;
+};
+
+
+struct solos_param {
+	struct list_head list;
+	pid_t pid;
+	int port;
+	struct sk_buff *response;
+};
+
+#define SOLOS_CHAN(atmdev) ((int)(unsigned long)(atmdev)->phy_data)
+
+MODULE_AUTHOR("Traverse Technologies <support@traverse.com.au>");
+MODULE_DESCRIPTION("Solos PCI driver");
+MODULE_VERSION(VERSION);
+MODULE_LICENSE("GPL");
+MODULE_FIRMWARE("solos-FPGA.bin");
+MODULE_FIRMWARE("solos-Firmware.bin");
+MODULE_FIRMWARE("solos-db-FPGA.bin");
+MODULE_PARM_DESC(reset, "Reset Solos chips on startup");
+MODULE_PARM_DESC(atmdebug, "Print ATM data");
+MODULE_PARM_DESC(firmware_upgrade, "Initiate Solos firmware upgrade");
+MODULE_PARM_DESC(fpga_upgrade, "Initiate FPGA upgrade");
+MODULE_PARM_DESC(db_firmware_upgrade, "Initiate daughter board Solos firmware upgrade");
+MODULE_PARM_DESC(db_fpga_upgrade, "Initiate daughter board FPGA upgrade");
+module_param(reset, int, 0444);
+module_param(atmdebug, int, 0644);
+module_param(firmware_upgrade, int, 0444);
+module_param(fpga_upgrade, int, 0444);
+module_param(db_firmware_upgrade, int, 0444);
+module_param(db_fpga_upgrade, int, 0444);
+
+static void fpga_queue(struct solos_card *card, int port, struct sk_buff *skb,
+		       struct atm_vcc *vcc);
+static uint32_t fpga_tx(struct solos_card *);
+static irqreturn_t solos_irq(int irq, void *dev_id);
+static struct atm_vcc* find_vcc(struct atm_dev *dev, short vpi, int vci);
+static int atm_init(struct solos_card *, struct device *);
+static void atm_remove(struct solos_card *);
+static int send_command(struct solos_card *card, int dev, const char *buf, size_t size);
+static void solos_bh(unsigned long);
+static int print_buffer(struct sk_buff *buf);
+
+static inline void solos_pop(struct atm_vcc *vcc, struct sk_buff *skb)
+{
+        if (vcc->pop)
+                vcc->pop(vcc, skb);
+        else
+                dev_kfree_skb_any(skb);
+}
+
+static ssize_t solos_param_show(struct device *dev, struct device_attribute *attr,
+				char *buf)
+{
+	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
+	struct solos_card *card = atmdev->dev_data;
+	struct solos_param prm;
+	struct sk_buff *skb;
+	struct pkt_hdr *header;
+	int buflen;
+
+	buflen = strlen(attr->attr.name) + 10;
+
+	skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
+	if (!skb) {
+		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_show()\n");
+		return -ENOMEM;
+	}
+
+	header = skb_put(skb, sizeof(*header));
+
+	buflen = snprintf((void *)&header[1], buflen - 1,
+			  "L%05d\n%s\n", current->pid, attr->attr.name);
+	skb_put(skb, buflen);
+
+	header->size = cpu_to_le16(buflen);
+	header->vpi = cpu_to_le16(0);
+	header->vci = cpu_to_le16(0);
+	header->type = cpu_to_le16(PKT_COMMAND);
+
+	prm.pid = current->pid;
+	prm.response = NULL;
+	prm.port = SOLOS_CHAN(atmdev);
+
+	spin_lock_irq(&card->param_queue_lock);
+	list_add(&prm.list, &card->param_queue);
+	spin_unlock_irq(&card->param_queue_lock);
+
+	fpga_queue(card, prm.port, skb, NULL);
+
+	wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
+
+	spin_lock_irq(&card->param_queue_lock);
+	list_del(&prm.list);
+	spin_unlock_irq(&card->param_queue_lock);
+
+	if (!prm.response)
+		return -EIO;
+
+	buflen = prm.response->len;
+	memcpy(buf, prm.response->data, buflen);
+	kfree_skb(prm.response);
+
+	return buflen;
+}
+
+static ssize_t solos_param_store(struct device *dev, struct device_attribute *attr,
+				 const char *buf, size_t count)
+{
+	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
+	struct solos_card *card = atmdev->dev_data;
+	struct solos_param prm;
+	struct sk_buff *skb;
+	struct pkt_hdr *header;
+	int buflen;
+	ssize_t ret;
+
+	buflen = strlen(attr->attr.name) + 11 + count;
+
+	skb = alloc_skb(sizeof(*header) + buflen, GFP_KERNEL);
+	if (!skb) {
+		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in solos_param_store()\n");
+		return -ENOMEM;
+	}
+
+	header = skb_put(skb, sizeof(*header));
+
+	buflen = snprintf((void *)&header[1], buflen - 1,
+			  "L%05d\n%s\n%s\n", current->pid, attr->attr.name, buf);
+
+	skb_put(skb, buflen);
+	header->size = cpu_to_le16(buflen);
+	header->vpi = cpu_to_le16(0);
+	header->vci = cpu_to_le16(0);
+	header->type = cpu_to_le16(PKT_COMMAND);
+
+	prm.pid = current->pid;
+	prm.response = NULL;
+	prm.port = SOLOS_CHAN(atmdev);
+
+	spin_lock_irq(&card->param_queue_lock);
+	list_add(&prm.list, &card->param_queue);
+	spin_unlock_irq(&card->param_queue_lock);
+
+	fpga_queue(card, prm.port, skb, NULL);
+
+	wait_event_timeout(card->param_wq, prm.response, 5 * HZ);
+
+	spin_lock_irq(&card->param_queue_lock);
+	list_del(&prm.list);
+	spin_unlock_irq(&card->param_queue_lock);
+
+	skb = prm.response;
+
+	if (!skb)
+		return -EIO;
+
+	buflen = skb->len;
+
+	/* Sometimes it has a newline, sometimes it doesn't. */
+	if (skb->data[buflen - 1] == '\n')
+		buflen--;
+
+	if (buflen == 2 && !strncmp(skb->data, "OK", 2))
+		ret = count;
+	else if (buflen == 5 && !strncmp(skb->data, "ERROR", 5))
+		ret = -EIO;
+	else {
+		/* We know we have enough space allocated for this; we allocated 
+		   it ourselves */
+		skb->data[buflen] = 0;
+	
+		dev_warn(&card->dev->dev, "Unexpected parameter response: '%s'\n",
+			 skb->data);
+		ret = -EIO;
+	}
+	kfree_skb(skb);
+
+	return ret;
+}
+
+static char *next_string(struct sk_buff *skb)
+{
+	int i = 0;
+	char *this = skb->data;
+	
+	for (i = 0; i < skb->len; i++) {
+		if (this[i] == '\n') {
+			this[i] = 0;
+			skb_pull(skb, i + 1);
+			return this;
+		}
+		if (!isprint(this[i]))
+			return NULL;
+	}
+	return NULL;
+}
+
+/*
+ * Status packet has fields separated by \n, starting with a version number
+ * for the information therein. Fields are....
+ *
+ *     packet version
+ *     RxBitRate	(version >= 1)
+ *     TxBitRate	(version >= 1)
+ *     State		(version >= 1)
+ *     LocalSNRMargin	(version >= 1)
+ *     LocalLineAttn	(version >= 1)
+ */       
+static int process_status(struct solos_card *card, int port, struct sk_buff *skb)
+{
+	char *str, *state_str, *snr, *attn;
+	int ver, rate_up, rate_down, err;
+
+	if (!card->atmdev[port])
+		return -ENODEV;
+
+	str = next_string(skb);
+	if (!str)
+		return -EIO;
+
+	err = kstrtoint(str, 10, &ver);
+	if (err) {
+		dev_warn(&card->dev->dev, "Unexpected status interrupt version\n");
+		return err;
+	}
+	if (ver < 1) {
+		dev_warn(&card->dev->dev, "Unexpected status interrupt version %d\n",
+			 ver);
+		return -EIO;
+	}
+
+	str = next_string(skb);
+	if (!str)
+		return -EIO;
+	if (!strcmp(str, "ERROR")) {
+		dev_dbg(&card->dev->dev, "Status packet indicated Solos error on port %d (starting up?)\n",
+			 port);
+		return 0;
+	}
+
+	err = kstrtoint(str, 10, &rate_down);
+	if (err)
+		return err;
+
+	str = next_string(skb);
+	if (!str)
+		return -EIO;
+	err = kstrtoint(str, 10, &rate_up);
+	if (err)
+		return err;
+
+	state_str = next_string(skb);
+	if (!state_str)
+		return -EIO;
+
+	/* Anything but 'Showtime' is down */
+	if (strcmp(state_str, "Showtime")) {
+		atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_LOST);
+		dev_info(&card->dev->dev, "Port %d: %s\n", port, state_str);
+		return 0;
+	}
+
+	snr = next_string(skb);
+	if (!snr)
+		return -EIO;
+	attn = next_string(skb);
+	if (!attn)
+		return -EIO;
+
+	dev_info(&card->dev->dev, "Port %d: %s @%d/%d kb/s%s%s%s%s\n",
+		 port, state_str, rate_down/1000, rate_up/1000,
+		 snr[0]?", SNR ":"", snr, attn[0]?", Attn ":"", attn);
+	
+	card->atmdev[port]->link_rate = rate_down / 424;
+	atm_dev_signal_change(card->atmdev[port], ATM_PHY_SIG_FOUND);
+
+	return 0;
+}
+
+static int process_command(struct solos_card *card, int port, struct sk_buff *skb)
+{
+	struct solos_param *prm;
+	unsigned long flags;
+	int cmdpid;
+	int found = 0, err;
+
+	if (skb->len < 7)
+		return 0;
+
+	if (skb->data[0] != 'L'    || !isdigit(skb->data[1]) ||
+	    !isdigit(skb->data[2]) || !isdigit(skb->data[3]) ||
+	    !isdigit(skb->data[4]) || !isdigit(skb->data[5]) ||
+	    skb->data[6] != '\n')
+		return 0;
+
+	err = kstrtoint(&skb->data[1], 10, &cmdpid);
+	if (err)
+		return err;
+
+	spin_lock_irqsave(&card->param_queue_lock, flags);
+	list_for_each_entry(prm, &card->param_queue, list) {
+		if (prm->port == port && prm->pid == cmdpid) {
+			prm->response = skb;
+			skb_pull(skb, 7);
+			wake_up(&card->param_wq);
+			found = 1;
+			break;
+		}
+	}
+	spin_unlock_irqrestore(&card->param_queue_lock, flags);
+	return found;
+}
+
+static ssize_t console_show(struct device *dev, struct device_attribute *attr,
+			    char *buf)
+{
+	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
+	struct solos_card *card = atmdev->dev_data;
+	struct sk_buff *skb;
+	unsigned int len;
+
+	spin_lock_bh(&card->cli_queue_lock);
+	skb = skb_dequeue(&card->cli_queue[SOLOS_CHAN(atmdev)]);
+	spin_unlock_bh(&card->cli_queue_lock);
+	if(skb == NULL)
+		return sprintf(buf, "No data.\n");
+
+	len = skb->len;
+	memcpy(buf, skb->data, len);
+
+	kfree_skb(skb);
+	return len;
+}
+
+static int send_command(struct solos_card *card, int dev, const char *buf, size_t size)
+{
+	struct sk_buff *skb;
+	struct pkt_hdr *header;
+
+	if (size > (BUF_SIZE - sizeof(*header))) {
+		dev_dbg(&card->dev->dev, "Command is too big.  Dropping request\n");
+		return 0;
+	}
+	skb = alloc_skb(size + sizeof(*header), GFP_ATOMIC);
+	if (!skb) {
+		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in send_command()\n");
+		return 0;
+	}
+
+	header = skb_put(skb, sizeof(*header));
+
+	header->size = cpu_to_le16(size);
+	header->vpi = cpu_to_le16(0);
+	header->vci = cpu_to_le16(0);
+	header->type = cpu_to_le16(PKT_COMMAND);
+
+	skb_put_data(skb, buf, size);
+
+	fpga_queue(card, dev, skb, NULL);
+
+	return 0;
+}
+
+static ssize_t console_store(struct device *dev, struct device_attribute *attr,
+			     const char *buf, size_t count)
+{
+	struct atm_dev *atmdev = container_of(dev, struct atm_dev, class_dev);
+	struct solos_card *card = atmdev->dev_data;
+	int err;
+
+	err = send_command(card, SOLOS_CHAN(atmdev), buf, count);
+
+	return err?:count;
+}
+
+struct geos_gpio_attr {
+	struct device_attribute attr;
+	int offset;
+};
+
+#define SOLOS_GPIO_ATTR(_name, _mode, _show, _store, _offset)	\
+	struct geos_gpio_attr gpio_attr_##_name = {		\
+		.attr = __ATTR(_name, _mode, _show, _store),	\
+		.offset = _offset }
+
+static ssize_t geos_gpio_store(struct device *dev, struct device_attribute *attr,
+			       const char *buf, size_t count)
+{
+	struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
+	struct solos_card *card = dev_get_drvdata(dev);
+	uint32_t data32;
+
+	if (count != 1 && (count != 2 || buf[1] != '\n'))
+		return -EINVAL;
+
+	spin_lock_irq(&card->param_queue_lock);
+	data32 = ioread32(card->config_regs + GPIO_STATUS);
+	if (buf[0] == '1') {
+		data32 |= 1 << gattr->offset;
+		iowrite32(data32, card->config_regs + GPIO_STATUS);
+	} else if (buf[0] == '0') {
+		data32 &= ~(1 << gattr->offset);
+		iowrite32(data32, card->config_regs + GPIO_STATUS);
+	} else {
+		count = -EINVAL;
+	}
+	spin_unlock_irq(&card->param_queue_lock);
+	return count;
+}
+
+static ssize_t geos_gpio_show(struct device *dev, struct device_attribute *attr,
+			      char *buf)
+{
+	struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
+	struct solos_card *card = dev_get_drvdata(dev);
+	uint32_t data32;
+
+	data32 = ioread32(card->config_regs + GPIO_STATUS);
+	data32 = (data32 >> gattr->offset) & 1;
+
+	return sprintf(buf, "%d\n", data32);
+}
+
+static ssize_t hardware_show(struct device *dev, struct device_attribute *attr,
+			     char *buf)
+{
+	struct geos_gpio_attr *gattr = container_of(attr, struct geos_gpio_attr, attr);
+	struct solos_card *card = dev_get_drvdata(dev);
+	uint32_t data32;
+
+	data32 = ioread32(card->config_regs + GPIO_STATUS);
+	switch (gattr->offset) {
+	case 0:
+		/* HardwareVersion */
+		data32 = data32 & 0x1F;
+		break;
+	case 1:
+		/* HardwareVariant */
+		data32 = (data32 >> 5) & 0x0F;
+		break;
+	}
+	return sprintf(buf, "%d\n", data32);
+}
+
+static DEVICE_ATTR_RW(console);
+
+
+#define SOLOS_ATTR_RO(x) static DEVICE_ATTR(x, 0444, solos_param_show, NULL);
+#define SOLOS_ATTR_RW(x) static DEVICE_ATTR(x, 0644, solos_param_show, solos_param_store);
+
+#include "solos-attrlist.c"
+
+static SOLOS_GPIO_ATTR(GPIO1, 0644, geos_gpio_show, geos_gpio_store, 9);
+static SOLOS_GPIO_ATTR(GPIO2, 0644, geos_gpio_show, geos_gpio_store, 10);
+static SOLOS_GPIO_ATTR(GPIO3, 0644, geos_gpio_show, geos_gpio_store, 11);
+static SOLOS_GPIO_ATTR(GPIO4, 0644, geos_gpio_show, geos_gpio_store, 12);
+static SOLOS_GPIO_ATTR(GPIO5, 0644, geos_gpio_show, geos_gpio_store, 13);
+static SOLOS_GPIO_ATTR(PushButton, 0444, geos_gpio_show, NULL, 14);
+static SOLOS_GPIO_ATTR(HardwareVersion, 0444, hardware_show, NULL, 0);
+static SOLOS_GPIO_ATTR(HardwareVariant, 0444, hardware_show, NULL, 1);
+#undef SOLOS_ATTR_RO
+#undef SOLOS_ATTR_RW
+
+#define SOLOS_ATTR_RO(x) &dev_attr_##x.attr,
+#define SOLOS_ATTR_RW(x) &dev_attr_##x.attr,
+
+static struct attribute *solos_attrs[] = {
+#include "solos-attrlist.c"
+	NULL
+};
+
+static const struct attribute_group solos_attr_group = {
+	.attrs = solos_attrs,
+	.name = "parameters",
+};
+
+static struct attribute *gpio_attrs[] = {
+	&gpio_attr_GPIO1.attr.attr,
+	&gpio_attr_GPIO2.attr.attr,
+	&gpio_attr_GPIO3.attr.attr,
+	&gpio_attr_GPIO4.attr.attr,
+	&gpio_attr_GPIO5.attr.attr,
+	&gpio_attr_PushButton.attr.attr,
+	&gpio_attr_HardwareVersion.attr.attr,
+	&gpio_attr_HardwareVariant.attr.attr,
+	NULL
+};
+
+static const struct attribute_group gpio_attr_group = {
+	.attrs = gpio_attrs,
+	.name = "gpio",
+};
+
+static int flash_upgrade(struct solos_card *card, int chip)
+{
+	const struct firmware *fw;
+	const char *fw_name;
+	int blocksize = 0;
+	int numblocks = 0;
+	int offset;
+
+	switch (chip) {
+	case 0:
+		fw_name = "solos-FPGA.bin";
+		if (card->atmel_flash)
+			blocksize = ATMEL_FPGA_BLOCK;
+		else
+			blocksize = SPI_FLASH_BLOCK;
+		break;
+	case 1:
+		fw_name = "solos-Firmware.bin";
+		if (card->atmel_flash)
+			blocksize = ATMEL_SOLOS_BLOCK;
+		else
+			blocksize = SPI_FLASH_BLOCK;
+		break;
+	case 2:
+		if (card->fpga_version > LEGACY_BUFFERS){
+			fw_name = "solos-db-FPGA.bin";
+			if (card->atmel_flash)
+				blocksize = ATMEL_FPGA_BLOCK;
+			else
+				blocksize = SPI_FLASH_BLOCK;
+		} else {
+			dev_info(&card->dev->dev, "FPGA version doesn't support"
+					" daughter board upgrades\n");
+			return -EPERM;
+		}
+		break;
+	case 3:
+		if (card->fpga_version > LEGACY_BUFFERS){
+			fw_name = "solos-Firmware.bin";
+			if (card->atmel_flash)
+				blocksize = ATMEL_SOLOS_BLOCK;
+			else
+				blocksize = SPI_FLASH_BLOCK;
+		} else {
+			dev_info(&card->dev->dev, "FPGA version doesn't support"
+					" daughter board upgrades\n");
+			return -EPERM;
+		}
+		break;
+	default:
+		return -ENODEV;
+	}
+
+	if (request_firmware(&fw, fw_name, &card->dev->dev))
+		return -ENOENT;
+
+	dev_info(&card->dev->dev, "Flash upgrade starting\n");
+
+	/* New FPGAs require driver version before permitting flash upgrades */
+	iowrite32(DRIVER_VERSION, card->config_regs + DRIVER_VER);
+
+	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);
+	(void) ioread32(card->config_regs + FPGA_MODE); 
+
+	/* Set mode to Chip Erase */
+	if(chip == 0 || chip == 2)
+		dev_info(&card->dev->dev, "Set FPGA Flash mode to FPGA Chip Erase\n");
+	if(chip == 1 || chip == 3)
+		dev_info(&card->dev->dev, "Set FPGA Flash mode to Solos Chip Erase\n");
+	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 Atmel flash */
+		for(i = 0; i < blocksize; i += 4) {
+			uint32_t word;
+			if (card->atmel_flash)
+				word = swahb32p((uint32_t *)(fw->data + offset + i));
+			else
+				word = *(uint32_t *)(fw->data + offset + i);
+			if(card->fpga_version > LEGACY_BUFFERS)
+				iowrite32(word, FLASH_BUF + i);
+			else
+				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);
+}
+
+static 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;
+
+				dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
+						 RX_DMA_SIZE, DMA_FROM_DEVICE);
+
+				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);
+				if (size > (card->buffer_size - sizeof(*header))){
+					dev_warn(&card->dev->dev, "Invalid buffer size\n");
+					continue;
+				}
+
+				/* Use netdev_alloc_skb() because it adds NET_SKB_PAD of
+				 * headroom, and ensures we can route packets back out an
+				 * Ethernet interface (for example) without having to
+				 * reallocate. Adding NET_IP_ALIGN also ensures that both
+				 * PPPoATM and PPPoEoBR2684 packets end up aligned. */
+				skb = netdev_alloc_skb_ip_align(NULL, size + 1);
+				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: port %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 VPI.VCI %d.%d on port %d\n",
+							 le16_to_cpu(header->vpi), le16_to_cpu(header->vci),
+							 port);
+					dev_kfree_skb_any(skb);
+					break;
+				}
+				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]) {
+			/* Unlike the MMIO case (qv) we can't add NET_IP_ALIGN
+			 * here; the FPGA can only DMA to addresses which are
+			 * aligned to 4 bytes. */
+			struct sk_buff *skb = dev_alloc_skb(RX_DMA_SIZE);
+			if (skb) {
+				SKB_CB(skb)->dma_addr =
+					dma_map_single(&card->dev->dev, skb->data,
+						       RX_DMA_SIZE, DMA_FROM_DEVICE);
+				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 sock *s;
+
+	read_lock(&vcc_sklist_lock);
+	head = &vcc_hash[vci & (VCC_HTABLE_SIZE -1)];
+	sk_for_each(s, head) {
+		vcc = atm_sk(s);
+		if (vcc->dev == dev && vcc->vci == vci &&
+		    vcc->vpi == vpi && vcc->qos.rxtp.traffic_class != ATM_NONE &&
+		    test_bit(ATM_VF_READY, &vcc->flags))
+			goto out;
+	}
+	vcc = NULL;
+ out:
+	read_unlock(&vcc_sklist_lock);
+	return vcc;
+}
+
+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_KERNEL);
+	if (!skb) {
+		if (net_ratelimit())
+			dev_warn(&card->dev->dev, "Failed to allocate sk_buff in popen()\n");
+		return -ENOMEM;
+	}
+	header = 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);
+
+	return 0;
+}
+
+static void pclose(struct atm_vcc *vcc)
+{
+	struct solos_card *card = vcc->dev->dev_data;
+	unsigned char port = SOLOS_CHAN(vcc->dev);
+	struct sk_buff *skb, *tmpskb;
+	struct pkt_hdr *header;
+
+	/* Remove any yet-to-be-transmitted packets from the pending queue */
+	spin_lock_bh(&card->tx_queue_lock);
+	skb_queue_walk_safe(&card->tx_queue[port], skb, tmpskb) {
+		if (SKB_CB(skb)->vcc == vcc) {
+			skb_unlink(skb, &card->tx_queue[port]);
+			solos_pop(vcc, skb);
+		}
+	}
+	spin_unlock_bh(&card->tx_queue_lock);
+
+	skb = alloc_skb(sizeof(*header), GFP_KERNEL);
+	if (!skb) {
+		dev_warn(&card->dev->dev, "Failed to allocate sk_buff in pclose()\n");
+		return;
+	}
+	header = 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);
+
+	skb_get(skb);
+	fpga_queue(card, port, skb, NULL);
+
+	if (!wait_event_timeout(card->param_wq, !skb_shared(skb), 5 * HZ))
+		dev_warn(&card->dev->dev,
+			 "Timeout waiting for VCC close on port %d\n", port);
+
+	dev_kfree_skb(skb);
+
+	/* Hold up vcc_destroy_socket() (our caller) until solos_bh() in the
+	   tasklet has finished processing any incoming packets (and, more to
+	   the point, using the vcc pointer). */
+	tasklet_unlock_wait(&card->tlet);
+
+	clear_bit(ATM_VF_ADDR, &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) {
+				dma_unmap_single(&card->dev->dev, SKB_CB(oldskb)->dma_addr,
+						 oldskb->len, DMA_TO_DEVICE);
+				card->tx_skb[port] = NULL;
+			}
+			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) {
+				unsigned char *data = skb->data;
+				if ((unsigned long)data & card->dma_alignment) {
+					data = card->dma_bounce + (BUF_SIZE * port);
+					memcpy(data, skb->data, skb->len);
+				}
+				SKB_CB(skb)->dma_addr = dma_map_single(&card->dev->dev, data,
+								       skb->len, DMA_TO_DEVICE);
+				card->tx_skb[port] = skb;
+				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) {
+				struct pkt_hdr *header = (void *)oldskb->data;
+				int size = le16_to_cpu(header->size);
+
+				skb_pull(oldskb, sizeof(*header));
+				dev_info(&card->dev->dev, "Transmitted: port %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(oldskb);
+			}
+
+			vcc = SKB_CB(oldskb)->vcc;
+
+			if (vcc) {
+				atomic_inc(&vcc->stats->tx);
+				solos_pop(vcc, oldskb);
+			} else {
+				dev_kfree_skb_irq(oldskb);
+				wake_up(&card->param_wq);
+			}
+		}
+	}
+	/* 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 = 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 const struct atmdev_ops fpga_ops = {
+	.open =		popen,
+	.close =	pclose,
+	.ioctl =	NULL,
+	.send =		psend,
+	.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_obj(*card);
+	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 = dma_set_mask_and_coherent(&dev->dev, DMA_BIT_MASK(32));
+	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");
+		err = -ENOMEM;
+		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");
+		err = -ENOMEM;
+		goto out_unmap_config;
+	}
+
+	if (reset) {
+		iowrite32(1, card->config_regs + FPGA_MODE);
+		ioread32(card->config_regs + FPGA_MODE);
+
+		iowrite32(0, card->config_regs + FPGA_MODE);
+		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);
+	card->fpga_version = FPGA_VERSION(major_ver,minor_ver);
+	if (card->fpga_version > LEGACY_BUFFERS)
+		card->buffer_size = BUF_SIZE;
+	else
+		card->buffer_size = OLD_BUF_SIZE;
+	dev_info(&dev->dev, "Solos FPGA Version %d.%02d svn-%d\n",
+		 major_ver, minor_ver, fpga_ver);
+
+	if (fpga_ver < 37 && (fpga_upgrade || firmware_upgrade ||
+			      db_fpga_upgrade || db_firmware_upgrade)) {
+		dev_warn(&dev->dev,
+			 "FPGA too old; cannot upgrade flash. Use JTAG.\n");
+		fpga_upgrade = firmware_upgrade = 0;
+		db_fpga_upgrade = db_firmware_upgrade = 0;
+	}
+
+	/* Stopped using Atmel flash after 0.03-38 */
+	if (fpga_ver < 39)
+		card->atmel_flash = 1;
+	else
+		card->atmel_flash = 0;
+
+	data32 = ioread32(card->config_regs + PORTS);
+	card->nr_ports = (data32 & 0x000000FF);
+
+	if (card->fpga_version >= DMA_SUPPORTED) {
+		pci_set_master(dev);
+		card->using_dma = 1;
+		if (1) { /* All known FPGA versions so far */
+			card->dma_alignment = 3;
+			card->dma_bounce = kmalloc_array(card->nr_ports,
+							 BUF_SIZE, GFP_KERNEL);
+			if (!card->dma_bounce) {
+				dev_warn(&card->dev->dev, "Failed to allocate DMA bounce buffers\n");
+				err = -ENOMEM;
+				/* Fallback to MMIO doesn't work */
+				goto out_unmap_both;
+			}
+		}
+	} else {
+		card->using_dma = 0;
+		/* Set RX empty flag for all ports */
+		iowrite32(0xF0, card->config_regs + FLAGS_ADDR);
+	}
+
+	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);
+
+	if (db_fpga_upgrade)
+		flash_upgrade(card, 2);
+
+	if (db_firmware_upgrade)
+		flash_upgrade(card, 3);
+
+	err = atm_init(card, &dev->dev);
+	if (err)
+		goto out_free_irq;
+
+	if (card->fpga_version >= DMA_SUPPORTED &&
+	    sysfs_create_group(&card->dev->dev.kobj, &gpio_attr_group))
+		dev_err(&card->dev->dev, "Could not register parameter group for GPIOs\n");
+
+	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:
+	kfree(card->dma_bounce);
+	pci_iounmap(dev, card->buffers);
+ out_unmap_config:
+	pci_iounmap(dev, card->config_regs);
+ out_release_regions:
+	pci_release_regions(dev);
+ out:
+	kfree(card);
+	return err;
+}
+
+static int atm_init(struct solos_card *card, struct device *parent)
+{
+	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", parent, &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;
+		atm_dev_signal_change(card->atmdev[i], ATM_PHY_SIG_FOUND);
+
+		skb = alloc_skb(sizeof(*header), GFP_KERNEL);
+		if (!skb) {
+			dev_warn(&card->dev->dev, "Failed to allocate sk_buff in atm_init()\n");
+			continue;
+		}
+
+		header = 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) {
+				dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
+						 RX_DMA_SIZE, DMA_FROM_DEVICE);
+				dev_kfree_skb(skb);
+			}
+			skb = card->tx_skb[i];
+			if (skb) {
+				dma_unmap_single(&card->dev->dev, SKB_CB(skb)->dma_addr,
+						 skb->len, DMA_TO_DEVICE);
+				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); 
+
+	if (card->fpga_version >= DMA_SUPPORTED)
+		sysfs_remove_group(&card->dev->dev.kobj, &gpio_attr_group);
+
+	atm_remove(card);
+
+	free_irq(dev->irq, card);
+	tasklet_kill(&card->tlet);
+
+	kfree(card->dma_bounce);
+
+	/* 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);
+
+	kfree(card);
+}
+
+static const struct pci_device_id fpga_pci_tbl[] = {
+	{ PCI_DEVICE(0x10ee, 0x0300) },
+	{ }
+};
+
+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)
+{
+	BUILD_BUG_ON(sizeof(struct solos_skb_cb) > sizeof(((struct sk_buff *)0)->cb));
+
+	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);