patch-2.4.3 linux/drivers/scsi/aic7xxx/aic7xxx_linux_pci.c

• Lines: 317
• Date: Tue Mar 6 22:44:16 2001
• Orig file: v2.4.2/linux/drivers/scsi/aic7xxx/aic7xxx_linux_pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.2/linux/drivers/scsi/aic7xxx/aic7xxx_linux_pci.c linux/drivers/scsi/aic7xxx/aic7xxx_linux_pci.c
@@ -0,0 +1,316 @@
+/*
+ * Linux driver attachment glue for PCI based controllers.
+ *
+ * Copyright (c) 2000 Adaptec Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions, and the following disclaimer,
+ *    without modification.
+ * 2. The name of the author may not be used to endorse or promote products
+ *    derived from this software without specific prior written permission.
+ *
+ * Alternatively, this software may be distributed under the terms of the
+ * GNU Public License ("GPL").
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
+ * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $Id: //depot/src/linux/drivers/scsi/aic7xxx/aic7xxx_linux_pci.c#15 $
+ */
+
+#include "aic7xxx_osm.h"
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
+struct pci_device_id
+{
+};
+#endif
+
+static int	ahc_linux_pci_dev_probe(struct pci_dev *pdev,
+					const struct pci_device_id *ent);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+static void	ahc_linux_pci_dev_remove(struct pci_dev *pdev);
+
+/* We do our own ID filtering.  So, grab all SCSI storage class devices. */
+static struct pci_device_id ahc_linux_pci_id_table[] = {
+	{
+		0x9004, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+		PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0
+	},
+	{
+		0x9005, PCI_ANY_ID, PCI_ANY_ID, PCI_ANY_ID,
+		PCI_CLASS_STORAGE_SCSI << 8, 0xFFFF00, 0
+	},
+	{ 0 }
+};
+
+static struct pci_driver aic7xxx_pci_driver = {
+	name:		"aic7xxx",
+	probe:		ahc_linux_pci_dev_probe,
+	remove:		ahc_linux_pci_dev_remove,
+	id_table:	ahc_linux_pci_id_table
+};
+
+static void
+ahc_linux_pci_dev_remove(struct pci_dev *pdev)
+{
+	struct ahc_softc *ahc;
+	struct ahc_softc *list_ahc;
+
+	/*
+	 * We should be able to just perform
+	 * the free directly, but check our
+	 * list for extra sanity.
+	 */
+	ahc = (struct ahc_softc *)pdev->driver_data;
+	TAILQ_FOREACH(list_ahc, &ahc_tailq, links) {
+		if (list_ahc == ahc) {
+			ahc_free(ahc);
+			break;
+		}
+	}
+}
+#endif /* !LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0) */
+
+static int
+ahc_linux_pci_dev_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
+{
+	char	 buf[80];
+	struct	 ahc_softc *ahc;
+	ahc_dev_softc_t pci;
+	struct	 ahc_pci_identity *entry;
+	char	*name;
+	int	 error;
+
+	pci = pdev;
+	entry = ahc_find_pci_device(pci);
+	if (entry == NULL)
+		return (-ENODEV);
+
+	/*
+	 * Allocate a softc for this card and
+	 * set it up for attachment by our
+	 * common detect routine.
+	 */
+	sprintf(buf, "ahc_pci:%d:%d:%d",
+		ahc_get_pci_bus(pci),
+		ahc_get_pci_slot(pci),
+		ahc_get_pci_function(pci));
+	name = malloc(strlen(buf) + 1, M_DEVBUF, M_NOWAIT);
+	if (name == NULL)
+		return (-ENOMEM);
+	strcpy(name, buf);
+	ahc = ahc_alloc(NULL, name);
+	if (ahc == NULL)
+		return (-ENOMEM);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+	if (pci_enable_device(pdev)) {
+		ahc_free(ahc);
+		return (-ENODEV);
+	}
+	pci_set_master(pdev);
+#endif
+	ahc->dev_softc = pci;
+	ahc->platform_data->irq = pdev->irq;
+	error = ahc_pci_config(ahc, entry);
+	if (error != 0) {
+		ahc_free(ahc);
+		return (-error);
+	}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+	pdev->driver_data = ahc;
+	if (aic7xxx_detect_complete)
+		aic7xxx_register_host(ahc, aic7xxx_driver_template);
+#endif
+	return (0);
+}
+
+int
+ahc_linux_pci_probe(Scsi_Host_Template *template)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+	return (pci_module_init(&aic7xxx_pci_driver));
+#else
+	struct pci_dev *pdev;
+	u_int class;
+	int found;
+
+	/* If we don't have a PCI bus, we can't find any adapters. */
+	if (pci_present() == 0)
+		return (0);
+
+	found = 0;
+	pdev = NULL;
+	class = PCI_CLASS_STORAGE_SCSI << 8;
+	while ((pdev = pci_find_class(class, pdev)) != NULL) {
+		struct ahc_softc *ahc;
+		ahc_dev_softc_t pci;
+		int error;
+
+		pci = pdev;
+
+		/*
+		 * Some BIOSen report the same device multiple times.
+		 */
+		TAILQ_FOREACH(ahc, &ahc_tailq, links) {
+			struct pci_dev *probed_pdev;
+
+			probed_pdev = ahc->dev_softc;
+			if (probed_pdev->bus->number == pdev->bus->number
+			 && probed_pdev->devfn == pdev->devfn)
+				break;
+		}
+		if (ahc != NULL) {
+			/* Skip duplicate. */
+			continue;
+		}
+
+		error = ahc_linux_pci_dev_probe(pdev, /*pci_devid*/NULL);
+		if (error == 0)
+			found++;
+	}
+	return (found);
+#endif
+}
+
+int
+ahc_pci_map_registers(struct ahc_softc *ahc)
+{
+	uint32_t command;
+	u_long	 base;
+#ifdef MMAPIO
+	u_long	 start;
+	u_long	 base_page;
+	u_long	 base_offset;
+#endif
+	uint8_t *maddr;
+
+	command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
+	base = 0;
+	maddr = NULL;
+#ifdef MMAPIO
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+	start = pci_resource_start(ahc->dev_softc, 1);
+	base_page = start & PAGE_MASK;
+	base_offset = start - base_page;
+#else
+	start = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS+4, 4);
+	base_offset = start & PCI_BASE_ADDRESS_MEM_MASK;
+	base_page = base_offset & PAGE_MASK;
+	base_offset -= base_page;
+#endif
+	if (start != 0) {
+		ahc->platform_data->mem_busaddr = start;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+		if (request_mem_region(start, 0x1000, "aic7xxx") == 0) {
+			printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
+			       "in use. Cannot map device.\n",
+			       ahc_get_pci_bus(ahc->dev_softc),
+			       ahc_get_pci_slot(ahc->dev_softc),
+			       ahc_get_pci_function(ahc->dev_softc),
+			       start);
+		} else
+#endif
+			maddr = ioremap_nocache(base_page, base_offset + 256);
+		if (maddr != NULL) {
+			ahc->tag = BUS_SPACE_MEMIO;
+			ahc->bsh.maddr = maddr + base_offset;
+			command |= PCIM_CMD_MEMEN;
+			ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
+					     command, 4);
+
+			/*
+			 * Do a quick test to see if memory mapped
+			 * I/O is functioning correctly.
+			 */
+			if (ahc_inb(ahc, HCNTRL) == 0xFF) {
+				printf("aic7xxx: PCI Device %d:%d:%d "
+				       "failed memory mapped test\n",
+				       ahc_get_pci_bus(ahc->dev_softc),
+				       ahc_get_pci_slot(ahc->dev_softc),
+				       ahc_get_pci_function(ahc->dev_softc));
+				iounmap((void *)base_page);
+				maddr = NULL;
+			} else {
+				command &= ~PCIM_CMD_PORTEN;
+				ahc_pci_write_config(ahc->dev_softc,
+						    PCIR_COMMAND, command, 4);
+			}
+		}
+	}
+#endif
+
+	/*
+	 * We always prefer memory mapped access.  Only
+	 * complain about our ioport conflicting with
+	 * another device if we are going to use it.
+	 */
+	if (maddr == NULL) {
+		ahc->tag = BUS_SPACE_PIO;
+		command &= ~(PCIM_CMD_MEMEN|PCIM_CMD_PORTEN);
+		ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,3,0)
+		base = pci_resource_start(ahc->dev_softc, 0);
+#else
+		base = ahc_pci_read_config(ahc->dev_softc, PCIR_MAPS, 4);
+		base &= PCI_BASE_ADDRESS_IO_MASK;
+#endif
+		if (base == 0) {
+			printf("aic7xxx: PCI%d:%d:%d No mapping available. "
+			       "Cannot map device.\n",
+			       ahc_get_pci_bus(ahc->dev_softc),
+			       ahc_get_pci_slot(ahc->dev_softc),
+			       ahc_get_pci_function(ahc->dev_softc));
+			return (ENXIO);
+		}
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
+		if (check_region(base, 256) != 0) {
+#else
+		if (request_region(base, 256, "aic7xxx") == 0) {
+#endif
+			printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
+			       "in use. Cannot map device.\n",
+			       ahc_get_pci_bus(ahc->dev_softc),
+			       ahc_get_pci_slot(ahc->dev_softc),
+			       ahc_get_pci_function(ahc->dev_softc),
+			       base);
+			base = 0;
+			return (EBUSY);
+		}
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
+		request_region(base, 256, "aic7xxx");
+#endif
+		ahc->bsh.ioport = base;
+		command |= PCIM_CMD_PORTEN;
+		ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
+	}
+	return (0);
+}
+
+int
+ahc_pci_map_int(struct ahc_softc *ahc)
+{
+	int error;
+
+	ahc->platform_data->irq = ahc->dev_softc->irq;
+	error = request_irq(ahc->platform_data->irq, aic7xxx_isr,
+			    SA_INTERRUPT|SA_SHIRQ, "aic7xxx", ahc);
+	if (error < 0)
+		error = request_irq(ahc->platform_data->irq, aic7xxx_isr,
+				    SA_SHIRQ, "aic7xxx", ahc);
+	
+	return (-error);
+}