patch-2.4.19 linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c

• Lines: 417
• Date: Fri Aug 2 17:39:44 2002
• Orig file: linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -urN linux-2.4.18/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c linux-2.4.19/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c
@@ -0,0 +1,416 @@
+/*
+ * Linux driver attachment glue for PCI based controllers.
+ *
+ * Copyright (c) 2000-2001 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. Redistributions in binary form must reproduce at minimum a disclaimer
+ *    substantially similar to the "NO WARRANTY" disclaimer below
+ *    ("Disclaimer") and any redistribution must be conditioned upon
+ *    including a substantially similar Disclaimer requirement for further
+ *    binary redistribution.
+ * 3. Neither the names of the above-listed copyright holders nor the names
+ *    of any contributors may 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 General Public License ("GPL") version 2 as published by the Free
+ * Software Foundation.
+ *
+ * NO WARRANTY
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR 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 DAMAGES.
+ *
+ * $Id: //depot/aic7xxx/linux/drivers/scsi/aic7xxx/aic7xxx_osm_pci.c#32 $
+ */
+
+#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);
+static int	ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc,
+						u_long *base);
+#ifdef MMAPIO
+static int	ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
+						 u_long *bus_addr,
+						 uint8_t **maddr);
+#endif /* MMAPIO */
+#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 }
+};
+
+MODULE_DEVICE_TABLE(pci, ahc_linux_pci_id_table);
+
+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;
+	u_long l;
+
+	/*
+	 * We should be able to just perform
+	 * the free directly, but check our
+	 * list for extra sanity.
+	 */
+	ahc_list_lock(&l);
+	ahc = ahc_find_softc((struct ahc_softc *)pdev->driver_data);
+	if (ahc != NULL) {
+		u_long s;
+
+		ahc_lock(ahc, &s);
+		ahc_intr_enable(ahc, FALSE);
+		ahc_unlock(ahc, &s);
+		ahc_free(ahc);
+	}
+	ahc_list_unlock(&l);
+}
+#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;
+
+	/*
+	 * 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. */
+		return (-ENODEV);
+	}
+
+	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);
+
+	if (sizeof(bus_addr_t) > 4
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,3)
+	 && ahc_linux_get_memsize() > 0x80000000
+	 && pci_set_dma_mask(pdev, 0x7FFFFFFFFFULL) == 0) {
+#else
+	 && ahc_linux_get_memsize() > 0x80000000) {
+
+		ahc->dev_softc->dma_mask = 
+		    (bus_addr_t)(0x7FFFFFFFFFULL & (bus_addr_t)~0);
+#endif
+		ahc->flags |= AHC_39BIT_ADDRESSING;
+		ahc->platform_data->hw_dma_mask =
+		    (bus_addr_t)(0x7FFFFFFFFFULL & (bus_addr_t)~0);
+	}
+#endif
+	ahc->dev_softc = pci;
+	error = ahc_pci_config(ahc, entry);
+	if (error != 0) {
+		ahc_free(ahc);
+		return (-error);
+	}
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+	pci_set_drvdata(pdev, ahc);
+	if (aic7xxx_detect_complete)
+		ahc_linux_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) {
+		ahc_dev_softc_t pci;
+		int error;
+
+		pci = pdev;
+		error = ahc_linux_pci_dev_probe(pdev, /*pci_devid*/NULL);
+		if (error == 0)
+			found++;
+	}
+	return (found);
+#endif
+}
+
+static int
+ahc_linux_pci_reserve_io_region(struct ahc_softc *ahc, u_long *base)
+{
+#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)
+		return (ENOMEM);
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,0)
+	if (check_region(*base, 256) != 0)
+		return (ENOMEM);
+	else
+		request_region(*base, 256, "aic7xxx");
+#else
+	if (request_region(*base, 256, "aic7xxx") == 0)
+		return (ENOMEM);
+#endif
+	return (0);
+}
+
+#ifdef MMAPIO
+static int
+ahc_linux_pci_reserve_mem_region(struct ahc_softc *ahc,
+				 u_long *bus_addr,
+				 uint8_t **maddr)
+{
+	u_long	start;
+	u_long	base_page;
+	u_long	base_offset;
+	int	error;
+
+	error = 0;
+#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) {
+		*bus_addr = start;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+		if (request_mem_region(start, 0x1000, "aic7xxx") == 0)
+			error = ENOMEM;
+#endif
+		if (error == 0) {
+			*maddr = ioremap_nocache(base_page, base_offset + 256);
+			if (*maddr == NULL) {
+				error = ENOMEM;
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+				release_mem_region(start, 0x1000);
+#endif
+			} else
+				*maddr += base_offset;
+		}
+	} else
+		error = ENOMEM;
+	return (error);
+}
+#endif /* MMAPIO */
+
+int
+ahc_pci_map_registers(struct ahc_softc *ahc)
+{
+	uint32_t command;
+	u_long	 base;
+	uint8_t	*maddr;
+	int	 error;
+
+	/*
+	 * If its allowed, we prefer memory mapped access.
+	 */
+	command = ahc_pci_read_config(ahc->dev_softc, PCIR_COMMAND, 4);
+	command &= ~(PCIM_CMD_PORTEN|PCIM_CMD_MEMEN);
+	base = 0;
+	maddr = NULL;
+#ifdef MMAPIO
+	error = ahc_linux_pci_reserve_mem_region(ahc, &base, &maddr);
+	if (error == 0) {
+		ahc->platform_data->mem_busaddr = base;
+		ahc->tag = BUS_SPACE_MEMIO;
+		ahc->bsh.maddr = maddr;
+		ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND,
+				     command | PCIM_CMD_MEMEN, 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 *)((u_long)maddr & PAGE_MASK));
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+			release_mem_region(ahc->platform_data->mem_busaddr,
+					   0x1000);
+#endif
+			ahc->bsh.maddr = NULL;
+			maddr = NULL;
+		} else
+			command |= PCIM_CMD_MEMEN;
+	} else {
+		printf("aic7xxx: PCI%d:%d:%d MEM region 0x%lx "
+		       "unavailable. Cannot memory 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);
+	}
+#endif /* MMAPIO */
+
+	/*
+	 * We always prefer memory mapped access.
+	 */
+	if (maddr == NULL) {
+
+		error = ahc_linux_pci_reserve_io_region(ahc, &base);
+		if (error == 0) {
+			ahc->tag = BUS_SPACE_PIO;
+			ahc->bsh.ioport = base;
+			command |= PCIM_CMD_PORTEN;
+		} else {
+			printf("aic7xxx: PCI%d:%d:%d IO region 0x%lx[0..255] "
+			       "unavailable. 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);
+		}
+	}
+	ahc_pci_write_config(ahc->dev_softc, PCIR_COMMAND, command, 4);
+	return (error);
+}
+
+int
+ahc_pci_map_int(struct ahc_softc *ahc)
+{
+	int error;
+
+	error = request_irq(ahc->dev_softc->irq, ahc_linux_isr,
+			    SA_SHIRQ, "aic7xxx", ahc);
+	if (error == 0)
+		ahc->platform_data->irq = ahc->dev_softc->irq;
+	
+	return (-error);
+}
+
+void
+ahc_power_state_change(struct ahc_softc *ahc, ahc_power_state new_state)
+{
+#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,4,0)
+	pci_set_power_state(ahc->dev_softc, new_state);
+#else
+	uint32_t cap;
+	u_int cap_offset;
+
+	/*
+	 * Traverse the capability list looking for
+	 * the power management capability.
+	 */
+	cap = 0;
+	cap_offset = ahc_pci_read_config(ahc->dev_softc,
+					 PCIR_CAP_PTR, /*bytes*/1);
+	while (cap_offset != 0) {
+
+		cap = ahc_pci_read_config(ahc->dev_softc,
+					  cap_offset, /*bytes*/4);
+		if ((cap & 0xFF) == 1
+		 && ((cap >> 16) & 0x3) > 0) {
+			uint32_t pm_control;
+
+			pm_control = ahc_pci_read_config(ahc->dev_softc,
+							 cap_offset + 4,
+							 /*bytes*/4);
+			pm_control &= ~0x3;
+			pm_control |= new_state;
+			ahc_pci_write_config(ahc->dev_softc,
+					     cap_offset + 4,
+					     pm_control, /*bytes*/2);
+			break;
+		}
+		cap_offset = (cap >> 8) & 0xFF;
+	}
+#endif 
+}