patch-2.4.15 linux/drivers/scsi/sym53c8xx_2/sym_glue.c
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- Lines: 3013
- Date:
Fri Nov 9 15:22:54 2001
- Orig file:
v2.4.14/linux/drivers/scsi/sym53c8xx_2/sym_glue.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.14/linux/drivers/scsi/sym53c8xx_2/sym_glue.c linux/drivers/scsi/sym53c8xx_2/sym_glue.c
@@ -0,0 +1,3012 @@
+/*
+ * Device driver for the SYMBIOS/LSILOGIC 53C8XX and 53C1010 family
+ * of PCI-SCSI IO processors.
+ *
+ * Copyright (C) 1999-2001 Gerard Roudier <groudier@free.fr>
+ *
+ * This driver is derived from the Linux sym53c8xx driver.
+ * Copyright (C) 1998-2000 Gerard Roudier
+ *
+ * The sym53c8xx driver is derived from the ncr53c8xx driver that had been
+ * a port of the FreeBSD ncr driver to Linux-1.2.13.
+ *
+ * The original ncr driver has been written for 386bsd and FreeBSD by
+ * Wolfgang Stanglmeier <wolf@cologne.de>
+ * Stefan Esser <se@mi.Uni-Koeln.de>
+ * Copyright (C) 1994 Wolfgang Stanglmeier
+ *
+ * Other major contributions:
+ *
+ * NVRAM detection and reading.
+ * Copyright (C) 1997 Richard Waltham <dormouse@farsrobt.demon.co.uk>
+ *
+ *-----------------------------------------------------------------------------
+ *
+ * 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.
+ * 2. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * Where this Software is combined with software released under the terms of
+ * the GNU Public License ("GPL") and the terms of the GPL would require the
+ * combined work to also be released under the terms of the GPL, the terms
+ * and conditions of this License will apply in addition to those of the
+ * GPL with the exception of any terms or conditions of this License that
+ * conflict with, or are expressly prohibited by, the GPL.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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.
+ */
+#define SYM_GLUE_C
+
+#include <linux/module.h>
+#include "sym_glue.h"
+
+#define NAME53C "sym53c"
+#define NAME53C8XX "sym53c8xx"
+
+/*
+ * Simple Wrapper to kernel PCI bus interface.
+ */
+
+typedef struct pci_dev *pcidev_t;
+#define PCIDEV_NULL (0)
+#define PciBusNumber(d) (d)->bus->number
+#define PciDeviceFn(d) (d)->devfn
+#define PciVendorId(d) (d)->vendor
+#define PciDeviceId(d) (d)->device
+#define PciIrqLine(d) (d)->irq
+
+static u_long __init
+pci_get_base_cookie(struct pci_dev *pdev, int index)
+{
+ u_long base;
+
+#if LINUX_VERSION_CODE > LinuxVersionCode(2,3,12)
+ base = pdev->resource[index].start;
+#else
+ base = pdev->base_address[index];
+#if BITS_PER_LONG > 32
+ if ((base & 0x7) == 0x4)
+ base |= (((u_long)pdev->base_address[++index]) << 32);
+#endif
+#endif
+ return (base & ~0x7ul);
+}
+
+static int __init
+pci_get_base_address(struct pci_dev *pdev, int index, u_long *base)
+{
+ u32 tmp;
+#define PCI_BAR_OFFSET(index) (PCI_BASE_ADDRESS_0 + (index<<2))
+
+ pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
+ *base = tmp;
+ ++index;
+ if ((tmp & 0x7) == 0x4) {
+#if BITS_PER_LONG > 32
+ pci_read_config_dword(pdev, PCI_BAR_OFFSET(index), &tmp);
+ *base |= (((u_long)tmp) << 32);
+#endif
+ ++index;
+ }
+ return index;
+#undef PCI_BAR_OFFSET
+}
+
+#if LINUX_VERSION_CODE < LinuxVersionCode(2,4,0)
+#define pci_enable_device(pdev) (0)
+#endif
+
+#if LINUX_VERSION_CODE < LinuxVersionCode(2,4,4)
+#define scsi_set_pci_device(inst, pdev) do { ;} while (0)
+#endif
+
+/*
+ * Insert a delay in micro-seconds and milli-seconds.
+ */
+void sym_udelay(int us) { udelay(us); }
+void sym_mdelay(int ms) { mdelay(ms); }
+
+/*
+ * SMP threading.
+ *
+ * The whole SCSI sub-system under Linux is basically single-threaded.
+ * Everything, including low-level driver interrupt routine, happens
+ * whith the `io_request_lock' held.
+ * The sym53c8xx-1.x drivers series ran their interrupt code using a
+ * spin mutex per controller. This added complexity without improving
+ * scalability significantly. the sym-2 driver still use a spinlock
+ * per controller for safety, but basically runs with the damned
+ * io_request_lock held.
+ */
+
+spinlock_t sym53c8xx_lock = SPIN_LOCK_UNLOCKED;
+
+#define SYM_LOCK_DRIVER(flags) spin_lock_irqsave(&sym53c8xx_lock, flags)
+#define SYM_UNLOCK_DRIVER(flags) spin_unlock_irqrestore(&sym53c8xx_lock,flags)
+
+#define SYM_INIT_LOCK_HCB(np) spin_lock_init(&np->s.smp_lock);
+#define SYM_LOCK_HCB(np, flags) spin_lock_irqsave(&np->s.smp_lock, flags)
+#define SYM_UNLOCK_HCB(np, flags) spin_unlock_irqrestore(&np->s.smp_lock, flags)
+
+#define SYM_LOCK_SCSI(np, flags) \
+ spin_lock_irqsave(&io_request_lock, flags)
+#define SYM_UNLOCK_SCSI(np, flags) \
+ spin_unlock_irqrestore(&io_request_lock, flags)
+
+/* Ugly, but will make things easier if this locking will ever disappear */
+#define SYM_LOCK_SCSI_NOSAVE(np) spin_lock_irq(&io_request_lock)
+#define SYM_UNLOCK_SCSI_NORESTORE(np) spin_unlock_irq(&io_request_lock)
+
+/*
+ * These simple macros limit expression involving
+ * kernel time values (jiffies) to some that have
+ * chance not to be too much incorrect. :-)
+ */
+#define ktime_get(o) (jiffies + (u_long) o)
+#define ktime_exp(b) ((long)(jiffies) - (long)(b) >= 0)
+#define ktime_dif(a, b) ((long)(a) - (long)(b))
+#define ktime_add(a, o) ((a) + (u_long)(o))
+#define ktime_sub(a, o) ((a) - (u_long)(o))
+
+/*
+ * Wrappers to the generic memory allocator.
+ */
+void *sym_calloc(int size, char *name)
+{
+ u_long flags;
+ void *m;
+ SYM_LOCK_DRIVER(flags);
+ m = sym_calloc_unlocked(size, name);
+ SYM_UNLOCK_DRIVER(flags);
+ return m;
+}
+
+void sym_mfree(void *m, int size, char *name)
+{
+ u_long flags;
+ SYM_LOCK_DRIVER(flags);
+ sym_mfree_unlocked(m, size, name);
+ SYM_UNLOCK_DRIVER(flags);
+}
+
+#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
+
+void *__sym_calloc_dma(m_pool_ident_t dev_dmat, int size, char *name)
+{
+ u_long flags;
+ void *m;
+ SYM_LOCK_DRIVER(flags);
+ m = __sym_calloc_dma_unlocked(dev_dmat, size, name);
+ SYM_UNLOCK_DRIVER(flags);
+ return m;
+}
+
+void __sym_mfree_dma(m_pool_ident_t dev_dmat, void *m, int size, char *name)
+{
+ u_long flags;
+ SYM_LOCK_DRIVER(flags);
+ __sym_mfree_dma_unlocked(dev_dmat, m, size, name);
+ SYM_UNLOCK_DRIVER(flags);
+}
+
+m_addr_t __vtobus(m_pool_ident_t dev_dmat, void *m)
+{
+ u_long flags;
+ m_addr_t b;
+ SYM_LOCK_DRIVER(flags);
+ b = __vtobus_unlocked(dev_dmat, m);
+ SYM_UNLOCK_DRIVER(flags);
+ return b;
+}
+
+#endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
+
+
+/*
+ * Map/unmap a PCI memory window.
+ */
+#ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
+static u_long __init pci_map_mem(u_long base, u_long size)
+{
+ u_long page_base = ((u_long) base) & PAGE_MASK;
+ u_long page_offs = ((u_long) base) - page_base;
+ u_long page_remapped = (u_long) ioremap(page_base, page_offs+size);
+
+ return page_remapped? (page_remapped + page_offs) : 0UL;
+}
+
+static void __init pci_unmap_mem(u_long vaddr, u_long size)
+{
+ if (vaddr)
+ iounmap((void *) (vaddr & PAGE_MASK));
+}
+#endif
+
+/*
+ * Used to retrieve the host structure when the
+ * driver is called from the proc FS.
+ */
+static struct Scsi_Host *first_host = NULL;
+
+/*
+ * /proc directory entry and proc_info.
+ */
+#if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
+static struct proc_dir_entry proc_scsi_sym53c8xx = {
+ PROC_SCSI_SYM53C8XX, 9, NAME53C8XX,
+ S_IFDIR | S_IRUGO | S_IXUGO, 2
+};
+#endif
+
+/*
+ * Transfer direction
+ *
+ * Until some linux kernel version near 2.3.40, low-level scsi
+ * drivers were not told about data transfer direction.
+ */
+#if LINUX_VERSION_CODE > LinuxVersionCode(2, 3, 40)
+
+#define scsi_data_direction(cmd) (cmd->sc_data_direction)
+
+#else
+
+static __inline__ int scsi_data_direction(Scsi_Cmnd *cmd)
+{
+ int direction;
+
+ switch((int) cmd->cmnd[0]) {
+ case 0x08: /* READ(6) 08 */
+ case 0x28: /* READ(10) 28 */
+ case 0xA8: /* READ(12) A8 */
+ direction = SCSI_DATA_READ;
+ break;
+ case 0x0A: /* WRITE(6) 0A */
+ case 0x2A: /* WRITE(10) 2A */
+ case 0xAA: /* WRITE(12) AA */
+ direction = SCSI_DATA_WRITE;
+ break;
+ default:
+ direction = SCSI_DATA_UNKNOWN;
+ break;
+ }
+
+ return direction;
+}
+
+#endif
+
+/*
+ * Driver host data structure.
+ */
+struct host_data {
+ hcb_p ncb;
+};
+
+/*
+ * Some type that fit DMA addresses as seen from BUS.
+ */
+#ifndef SYM_LINUX_DYNAMIC_DMA_MAPPING
+typedef u_long bus_addr_t;
+#else
+#if SYM_CONF_DMA_ADDRESSING_MODE > 0
+typedef dma64_addr_t bus_addr_t;
+#else
+typedef dma_addr_t bus_addr_t;
+#endif
+#endif
+
+/*
+ * Used by the eh thread to wait for command completion.
+ * It is allocated on the eh thread stack.
+ */
+struct sym_eh_wait {
+ struct semaphore sem;
+ struct timer_list timer;
+ void (*old_done)(Scsi_Cmnd *);
+ int to_do;
+ int timed_out;
+};
+
+/*
+ * Driver private area in the SCSI command structure.
+ */
+struct sym_ucmd { /* Override the SCSI pointer structure */
+ SYM_QUEHEAD link_cmdq; /* Must stay at offset ZERO */
+#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
+ bus_addr_t data_mapping;
+ u_char data_mapped;
+#endif
+ struct sym_eh_wait *eh_wait;
+};
+
+typedef struct sym_ucmd *ucmd_p;
+
+#define SYM_UCMD_PTR(cmd) ((ucmd_p)(&(cmd)->SCp))
+#define SYM_SCMD_PTR(ucmd) sym_que_entry(ucmd, Scsi_Cmnd, SCp)
+#define SYM_SOFTC_PTR(cmd) (((struct host_data *)cmd->host->hostdata)->ncb)
+
+/*
+ * Deal with DMA mapping/unmapping.
+ */
+
+#ifndef SYM_LINUX_DYNAMIC_DMA_MAPPING
+
+/* Linux versions prior to pci bus iommu kernel interface */
+
+#define __unmap_scsi_data(pdev, cmd) do {; } while (0)
+#define __map_scsi_single_data(pdev, cmd) (__vtobus(pdev,(cmd)->request_buffer))
+#define __map_scsi_sg_data(pdev, cmd) ((cmd)->use_sg)
+#define __sync_scsi_data(pdev, cmd) do {; } while (0)
+
+#define bus_sg_dma_address(sc) vtobus((sc)->address)
+#define bus_sg_dma_len(sc) ((sc)->length)
+
+#else /* Linux version with pci bus iommu kernel interface */
+
+#define bus_unmap_sg(pdev, sgptr, sgcnt, dir) \
+ pci_unmap_sg(pdev, sgptr, sgcnt, dir)
+
+#define bus_unmap_single(pdev, mapping, bufptr, dir) \
+ pci_unmap_single(pdev, mapping, bufptr, dir)
+
+#define bus_map_single(pdev, bufptr, bufsiz, dir) \
+ pci_map_single(pdev, bufptr, bufsiz, dir)
+
+#define bus_map_sg(pdev, sgptr, sgcnt, dir) \
+ pci_map_sg(pdev, sgptr, sgcnt, dir)
+
+#define bus_dma_sync_sg(pdev, sgptr, sgcnt, dir) \
+ pci_dma_sync_sg(pdev, sgptr, sgcnt, dir)
+
+#define bus_dma_sync_single(pdev, mapping, bufsiz, dir) \
+ pci_dma_sync_single(pdev, mapping, bufsiz, dir)
+
+#define bus_sg_dma_address(sc) sg_dma_address(sc)
+#define bus_sg_dma_len(sc) sg_dma_len(sc)
+
+static void __unmap_scsi_data(pcidev_t pdev, Scsi_Cmnd *cmd)
+{
+ int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
+
+ switch(SYM_UCMD_PTR(cmd)->data_mapped) {
+ case 2:
+ bus_unmap_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
+ break;
+ case 1:
+ bus_unmap_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
+ cmd->request_bufflen, dma_dir);
+ break;
+ }
+ SYM_UCMD_PTR(cmd)->data_mapped = 0;
+}
+
+static bus_addr_t __map_scsi_single_data(pcidev_t pdev, Scsi_Cmnd *cmd)
+{
+ bus_addr_t mapping;
+ int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
+
+ mapping = bus_map_single(pdev, cmd->request_buffer,
+ cmd->request_bufflen, dma_dir);
+ if (mapping) {
+ SYM_UCMD_PTR(cmd)->data_mapped = 1;
+ SYM_UCMD_PTR(cmd)->data_mapping = mapping;
+ }
+
+ return mapping;
+}
+
+static int __map_scsi_sg_data(pcidev_t pdev, Scsi_Cmnd *cmd)
+{
+ int use_sg;
+ int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
+
+ use_sg = bus_map_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
+ if (use_sg > 0) {
+ SYM_UCMD_PTR(cmd)->data_mapped = 2;
+ SYM_UCMD_PTR(cmd)->data_mapping = use_sg;
+ }
+
+ return use_sg;
+}
+
+static void __sync_scsi_data(pcidev_t pdev, Scsi_Cmnd *cmd)
+{
+ int dma_dir = scsi_to_pci_dma_dir(cmd->sc_data_direction);
+
+ switch(SYM_UCMD_PTR(cmd)->data_mapped) {
+ case 2:
+ bus_dma_sync_sg(pdev, cmd->buffer, cmd->use_sg, dma_dir);
+ break;
+ case 1:
+ bus_dma_sync_single(pdev, SYM_UCMD_PTR(cmd)->data_mapping,
+ cmd->request_bufflen, dma_dir);
+ break;
+ }
+}
+
+#endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
+
+#define unmap_scsi_data(np, cmd) \
+ __unmap_scsi_data(np->s.device, cmd)
+#define map_scsi_single_data(np, cmd) \
+ __map_scsi_single_data(np->s.device, cmd)
+#define map_scsi_sg_data(np, cmd) \
+ __map_scsi_sg_data(np->s.device, cmd)
+#define sync_scsi_data(np, cmd) \
+ __sync_scsi_data(np->s.device, cmd)
+
+/*
+ * Complete a pending CAM CCB.
+ */
+void sym_xpt_done(hcb_p np, Scsi_Cmnd *ccb)
+{
+ sym_remque(&SYM_UCMD_PTR(ccb)->link_cmdq);
+ unmap_scsi_data(np, ccb);
+ ccb->scsi_done(ccb);
+}
+
+void sym_xpt_done2(hcb_p np, Scsi_Cmnd *ccb, int cam_status)
+{
+ sym_set_cam_status(ccb, cam_status);
+ sym_xpt_done(np, ccb);
+}
+
+
+/*
+ * Print something that identifies the IO.
+ */
+void sym_print_addr (ccb_p cp)
+{
+ Scsi_Cmnd *cmd = cp->cam_ccb;
+ if (cmd)
+ printf("%s:%d:%d:", sym_name(SYM_SOFTC_PTR(cmd)),
+ cmd->target,cmd->lun);
+}
+
+/*
+ * Tell the SCSI layer about a BUS RESET.
+ */
+void sym_xpt_async_bus_reset(hcb_p np)
+{
+ printf_notice("%s: SCSI BUS has been reset.\n", sym_name(np));
+ np->s.settle_time = ktime_get(sym_driver_setup.settle_delay * HZ);
+ np->s.settle_time_valid = 1;
+ if (sym_verbose >= 2)
+ printf_info("%s: command processing suspended for %d seconds\n",
+ sym_name(np), sym_driver_setup.settle_delay);
+}
+
+/*
+ * Tell the SCSI layer about a BUS DEVICE RESET message sent.
+ */
+void sym_xpt_async_sent_bdr(hcb_p np, int target)
+{
+ printf_notice("%s: TARGET %d has been reset.\n", sym_name(np), target);
+}
+
+/*
+ * Tell the SCSI layer about the new transfer parameters.
+ */
+void sym_xpt_async_nego_wide(hcb_p np, int target)
+{
+ if (sym_verbose < 3)
+ return;
+ sym_announce_transfer_rate(np, target);
+}
+
+/*
+ * Choose the more appropriate CAM status if
+ * the IO encountered an extended error.
+ */
+static int sym_xerr_cam_status(int cam_status, int x_status)
+{
+ if (x_status) {
+ if (x_status & XE_PARITY_ERR)
+ cam_status = DID_PARITY;
+ else if (x_status &(XE_EXTRA_DATA|XE_SODL_UNRUN|XE_SWIDE_OVRUN))
+ cam_status = DID_ERROR;
+ else if (x_status & XE_BAD_PHASE)
+ cam_status = DID_ERROR;
+ else
+ cam_status = DID_ERROR;
+ }
+ return cam_status;
+}
+
+/*
+ * Build CAM result for a failed or auto-sensed IO.
+ */
+void sym_set_cam_result_error(hcb_p np, ccb_p cp, int resid)
+{
+ Scsi_Cmnd *csio = cp->cam_ccb;
+ u_int cam_status, scsi_status, drv_status;
+
+ drv_status = 0;
+ cam_status = DID_OK;
+ scsi_status = cp->ssss_status;
+
+ if (cp->host_flags & HF_SENSE) {
+ scsi_status = cp->sv_scsi_status;
+ resid = cp->sv_resid;
+ if (sym_verbose && cp->sv_xerr_status)
+ sym_print_xerr(cp, cp->sv_xerr_status);
+ if (cp->host_status == HS_COMPLETE &&
+ cp->ssss_status == S_GOOD &&
+ cp->xerr_status == 0) {
+ cam_status = sym_xerr_cam_status(DID_OK,
+ cp->sv_xerr_status);
+ drv_status = DRIVER_SENSE;
+ /*
+ * Bounce back the sense data to user.
+ */
+ bzero(&csio->sense_buffer, sizeof(csio->sense_buffer));
+ bcopy(cp->sns_bbuf, csio->sense_buffer,
+ MIN(sizeof(csio->sense_buffer),SYM_SNS_BBUF_LEN));
+#if 0
+ /*
+ * If the device reports a UNIT ATTENTION condition
+ * due to a RESET condition, we should consider all
+ * disconnect CCBs for this unit as aborted.
+ */
+ if (1) {
+ u_char *p;
+ p = (u_char *) csio->sense_data;
+ if (p[0]==0x70 && p[2]==0x6 && p[12]==0x29)
+ sym_clear_tasks(np, DID_ABORT,
+ cp->target,cp->lun, -1);
+ }
+#endif
+ }
+ else
+ cam_status = DID_ERROR;
+ }
+ else if (cp->host_status == HS_COMPLETE) /* Bad SCSI status */
+ cam_status = DID_OK;
+ else if (cp->host_status == HS_SEL_TIMEOUT) /* Selection timeout */
+ cam_status = DID_NO_CONNECT;
+ else if (cp->host_status == HS_UNEXPECTED) /* Unexpected BUS FREE*/
+ cam_status = DID_ERROR;
+ else { /* Extended error */
+ if (sym_verbose) {
+ PRINT_ADDR(cp);
+ printf ("COMMAND FAILED (%x %x %x).\n",
+ cp->host_status, cp->ssss_status,
+ cp->xerr_status);
+ }
+ /*
+ * Set the most appropriate value for CAM status.
+ */
+ cam_status = sym_xerr_cam_status(DID_ERROR, cp->xerr_status);
+ }
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,99)
+ csio->resid = resid;
+#endif
+ csio->result = (drv_status << 24) + (cam_status << 16) + scsi_status;
+}
+
+
+/*
+ * Called on successfull INQUIRY response.
+ */
+void sym_sniff_inquiry(hcb_p np, Scsi_Cmnd *cmd, int resid)
+{
+ int retv;
+
+ if (!cmd || cmd->use_sg)
+ return;
+
+ sync_scsi_data(np, cmd);
+ retv = __sym_sniff_inquiry(np, cmd->target, cmd->lun,
+ (u_char *) cmd->request_buffer,
+ cmd->request_bufflen - resid);
+ if (retv < 0)
+ return;
+ else if (retv)
+ sym_update_trans_settings(np, &np->target[cmd->target]);
+}
+
+/*
+ * Build the scatter/gather array for an I/O.
+ */
+
+static int sym_scatter_no_sglist(hcb_p np, ccb_p cp, Scsi_Cmnd *cmd)
+{
+ struct sym_tblmove *data = &cp->phys.data[SYM_CONF_MAX_SG-1];
+ int segment;
+
+ cp->data_len = cmd->request_bufflen;
+
+ if (cmd->request_bufflen) {
+ bus_addr_t baddr = map_scsi_single_data(np, cmd);
+ if (baddr) {
+ sym_build_sge(np, data, baddr, cmd->request_bufflen);
+ segment = 1;
+ }
+ else
+ segment = -2;
+ }
+ else
+ segment = 0;
+
+ return segment;
+}
+
+static int sym_scatter(hcb_p np, ccb_p cp, Scsi_Cmnd *cmd)
+{
+ int segment;
+ int use_sg = (int) cmd->use_sg;
+
+ cp->data_len = 0;
+
+ if (!use_sg)
+ segment = sym_scatter_no_sglist(np, cp, cmd);
+ else if (use_sg > SYM_CONF_MAX_SG)
+ segment = -1;
+ else if ((use_sg = map_scsi_sg_data(np, cmd)) > 0) {
+ struct scatterlist *scatter = (struct scatterlist *)cmd->buffer;
+ struct sym_tblmove *data;
+
+ data = &cp->phys.data[SYM_CONF_MAX_SG - use_sg];
+
+ for (segment = 0; segment < use_sg; segment++) {
+ bus_addr_t baddr = bus_sg_dma_address(&scatter[segment]);
+ unsigned int len = bus_sg_dma_len(&scatter[segment]);
+
+ sym_build_sge(np, &data[segment], baddr, len);
+ cp->data_len += len;
+ }
+ }
+ else
+ segment = -2;
+
+ return segment;
+}
+
+/*
+ * Queue a SCSI command.
+ */
+static int sym_queue_command(hcb_p np, Scsi_Cmnd *ccb)
+{
+/* Scsi_Device *device = ccb->device; */
+ tcb_p tp;
+ lcb_p lp;
+ ccb_p cp;
+ int order;
+
+ /*
+ * Minimal checkings, so that we will not
+ * go outside our tables.
+ */
+ if (ccb->target == np->myaddr ||
+ ccb->target >= SYM_CONF_MAX_TARGET ||
+ ccb->lun >= SYM_CONF_MAX_LUN) {
+ sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
+ return 0;
+ }
+
+ /*
+ * Retreive the target descriptor.
+ */
+ tp = &np->target[ccb->target];
+
+ /*
+ * Complete the 1st INQUIRY command with error
+ * condition if the device is flagged NOSCAN
+ * at BOOT in the NVRAM. This may speed up
+ * the boot and maintain coherency with BIOS
+ * device numbering. Clearing the flag allows
+ * user to rescan skipped devices later.
+ * We also return error for devices not flagged
+ * for SCAN LUNS in the NVRAM since some mono-lun
+ * devices behave badly when asked for some non
+ * zero LUN. Btw, this is an absolute hack.:-)
+ */
+ if (ccb->cmnd[0] == 0x12 || ccb->cmnd[0] == 0x0) {
+ if ((tp->usrflags & SYM_SCAN_BOOT_DISABLED) ||
+ ((tp->usrflags & SYM_SCAN_LUNS_DISABLED) &&
+ ccb->lun != 0)) {
+ tp->usrflags &= ~SYM_SCAN_BOOT_DISABLED;
+ sym_xpt_done2(np, ccb, CAM_DEV_NOT_THERE);
+ return 0;
+ }
+ }
+
+ /*
+ * Select tagged/untagged.
+ */
+ lp = sym_lp(np, tp, ccb->lun);
+ order = (lp && lp->s.reqtags) ? M_SIMPLE_TAG : 0;
+
+ /*
+ * Queue the SCSI IO.
+ */
+ cp = sym_get_ccb(np, ccb->target, ccb->lun, order);
+ if (!cp)
+ return 1; /* Means resource shortage */
+ (void) sym_queue_scsiio(np, ccb, cp);
+ return 0;
+}
+
+/*
+ * Setup buffers and pointers that address the CDB.
+ */
+static int __inline sym_setup_cdb(hcb_p np, Scsi_Cmnd *ccb, ccb_p cp)
+{
+ u32 cmd_ba;
+ int cmd_len;
+
+ /*
+ * CDB is 16 bytes max.
+ */
+ if (ccb->cmd_len > sizeof(cp->cdb_buf)) {
+ sym_set_cam_status(cp->cam_ccb, CAM_REQ_INVALID);
+ return -1;
+ }
+
+ bcopy(ccb->cmnd, cp->cdb_buf, ccb->cmd_len);
+ cmd_ba = CCB_BA (cp, cdb_buf[0]);
+ cmd_len = ccb->cmd_len;
+
+ cp->phys.cmd.addr = cpu_to_scr(cmd_ba);
+ cp->phys.cmd.size = cpu_to_scr(cmd_len);
+
+ return 0;
+}
+
+/*
+ * Setup pointers that address the data and start the I/O.
+ */
+int sym_setup_data_and_start(hcb_p np, Scsi_Cmnd *csio, ccb_p cp)
+{
+ int dir;
+ tcb_p tp = &np->target[cp->target];
+ lcb_p lp = sym_lp(np, tp, cp->lun);
+
+ /*
+ * Build the CDB.
+ */
+ if (sym_setup_cdb(np, csio, cp))
+ goto out_abort;
+
+ /*
+ * No direction means no data.
+ */
+ dir = scsi_data_direction(csio);
+ if (dir != SCSI_DATA_NONE) {
+ cp->segments = sym_scatter (np, cp, csio);
+ if (cp->segments < 0) {
+ if (cp->segments == -2)
+ sym_set_cam_status(csio, CAM_RESRC_UNAVAIL);
+ else
+ sym_set_cam_status(csio, CAM_REQ_TOO_BIG);
+ goto out_abort;
+ }
+ }
+ else {
+ cp->data_len = 0;
+ cp->segments = 0;
+ }
+
+ /*
+ * Set data pointers.
+ */
+ sym_setup_data_pointers(np, cp, dir);
+
+ /*
+ * When `#ifed 1', the code below makes the driver
+ * panic on the first attempt to write to a SCSI device.
+ * It is the first test we want to do after a driver
+ * change that does not seem obviously safe. :)
+ */
+#if 0
+ switch (cp->cdb_buf[0]) {
+ case 0x0A: case 0x2A: case 0xAA:
+ panic("XXXXXXXXXXXXX WRITE NOT YET ALLOWED XXXXXXXXXXXXXX\n");
+ MDELAY(10000);
+ break;
+ default:
+ break;
+ }
+#endif
+
+ /*
+ * activate this job.
+ */
+ if (lp)
+ sym_start_next_ccbs(np, lp, 2);
+ else
+ sym_put_start_queue(np, cp);
+ return 0;
+
+out_abort:
+ sym_free_ccb(np, cp);
+ sym_xpt_done(np, csio);
+ return 0;
+}
+
+
+/*
+ * timer daemon.
+ *
+ * Misused to keep the driver running when
+ * interrupts are not configured correctly.
+ */
+static void sym_timer (hcb_p np)
+{
+ u_long thistime = ktime_get(0);
+
+#if LINUX_VERSION_CODE < LinuxVersionCode(2, 4, 0)
+ /*
+ * If release process in progress, let's go
+ * Set the release stage from 1 to 2 to synchronize
+ * with the release process.
+ */
+
+ if (np->s.release_stage) {
+ if (np->s.release_stage == 1)
+ np->s.release_stage = 2;
+ return;
+ }
+#endif
+
+ /*
+ * Restart the timer.
+ */
+#ifdef SYM_CONF_PCIQ_BROKEN_INTR
+ np->s.timer.expires = ktime_get((HZ+99)/100);
+#else
+ np->s.timer.expires = ktime_get(SYM_CONF_TIMER_INTERVAL);
+#endif
+ add_timer(&np->s.timer);
+
+ /*
+ * If we are resetting the ncr, wait for settle_time before
+ * clearing it. Then command processing will be resumed.
+ */
+ if (np->s.settle_time_valid) {
+ if (ktime_dif(np->s.settle_time, thistime) <= 0){
+ if (sym_verbose >= 2 )
+ printk("%s: command processing resumed\n",
+ sym_name(np));
+ np->s.settle_time_valid = 0;
+ }
+ return;
+ }
+
+ /*
+ * Nothing to do for now, but that may come.
+ */
+ if (np->s.lasttime + 4*HZ < thistime) {
+ np->s.lasttime = thistime;
+ }
+
+#ifdef SYM_CONF_PCIQ_MAY_MISS_COMPLETIONS
+ /*
+ * Some way-broken PCI bridges may lead to
+ * completions being lost when the clearing
+ * of the INTFLY flag by the CPU occurs
+ * concurrently with the chip raising this flag.
+ * If this ever happen, lost completions will
+ * be reaped here.
+ */
+ sym_wakeup_done(np);
+#endif
+
+#ifdef SYM_CONF_PCIQ_BROKEN_INTR
+ if (INB(nc_istat) & (INTF|SIP|DIP)) {
+
+ /*
+ ** Process pending interrupts.
+ */
+ if (DEBUG_FLAGS & DEBUG_TINY) printk ("{");
+ sym_interrupt(np);
+ if (DEBUG_FLAGS & DEBUG_TINY) printk ("}");
+ }
+#endif /* SYM_CONF_PCIQ_BROKEN_INTR */
+}
+
+
+/*
+ * PCI BUS error handler.
+ */
+void sym_log_bus_error(hcb_p np)
+{
+ u_short pci_sts;
+ pci_read_config_word(np->s.device, PCI_STATUS, &pci_sts);
+ if (pci_sts & 0xf900) {
+ pci_write_config_word(np->s.device, PCI_STATUS,
+ pci_sts);
+ printf("%s: PCI STATUS = 0x%04x\n",
+ sym_name(np), pci_sts & 0xf900);
+ }
+}
+
+
+/*
+ * Requeue awaiting commands.
+ */
+static void sym_requeue_awaiting_cmds(hcb_p np)
+{
+ Scsi_Cmnd *cmd;
+ ucmd_p ucp = SYM_UCMD_PTR(cmd);
+ SYM_QUEHEAD tmp_cmdq;
+ int sts;
+
+ sym_que_move(&np->s.wait_cmdq, &tmp_cmdq);
+
+ while ((ucp = (ucmd_p) sym_remque_head(&tmp_cmdq)) != 0) {
+ sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
+ cmd = SYM_SCMD_PTR(ucp);
+ sts = sym_queue_command(np, cmd);
+ if (sts) {
+ sym_remque(&ucp->link_cmdq);
+ sym_insque_head(&ucp->link_cmdq, &np->s.wait_cmdq);
+ }
+ }
+}
+
+/*
+ * Linux entry point of the queuecommand() function
+ */
+int sym53c8xx_queue_command (Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *))
+{
+ hcb_p np = SYM_SOFTC_PTR(cmd);
+ ucmd_p ucp = SYM_UCMD_PTR(cmd);
+ u_long flags;
+ int sts = 0;
+
+ cmd->scsi_done = done;
+ cmd->host_scribble = NULL;
+ memset(ucp, 0, sizeof(*ucp));
+
+ SYM_LOCK_HCB(np, flags);
+
+ /*
+ * Shorten our settle_time if needed for
+ * this command not to time out.
+ */
+ if (np->s.settle_time_valid && cmd->timeout_per_command) {
+ u_long tlimit = ktime_get(cmd->timeout_per_command);
+ tlimit = ktime_sub(tlimit, SYM_CONF_TIMER_INTERVAL*2);
+ if (ktime_dif(np->s.settle_time, tlimit) > 0) {
+ np->s.settle_time = tlimit;
+ }
+ }
+
+ if (np->s.settle_time_valid || !sym_que_empty(&np->s.wait_cmdq)) {
+ sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
+ goto out;
+ }
+
+ sym_insque_tail(&ucp->link_cmdq, &np->s.busy_cmdq);
+ sts = sym_queue_command(np, cmd);
+ if (sts) {
+ sym_remque(&ucp->link_cmdq);
+ sym_insque_tail(&ucp->link_cmdq, &np->s.wait_cmdq);
+ }
+out:
+ SYM_UNLOCK_HCB(np, flags);
+
+ return 0;
+}
+
+/*
+ * Linux entry point of the interrupt handler.
+ */
+static void sym53c8xx_intr(int irq, void *dev_id, struct pt_regs * regs)
+{
+ unsigned long flags;
+ unsigned long flags1;
+ hcb_p np = (hcb_p) dev_id;
+
+ if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("[");
+
+ SYM_LOCK_SCSI(np, flags1);
+ SYM_LOCK_HCB(np, flags);
+
+ sym_interrupt(np);
+
+ if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
+ sym_requeue_awaiting_cmds(np);
+
+ SYM_UNLOCK_HCB(np, flags);
+ SYM_UNLOCK_SCSI(np, flags1);
+
+ if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n");
+}
+
+/*
+ * Linux entry point of the timer handler
+ */
+static void sym53c8xx_timer(unsigned long npref)
+{
+ hcb_p np = (hcb_p) npref;
+ unsigned long flags;
+ unsigned long flags1;
+
+ SYM_LOCK_SCSI(np, flags1);
+ SYM_LOCK_HCB(np, flags);
+
+ sym_timer(np);
+
+ if (!sym_que_empty(&np->s.wait_cmdq) && !np->s.settle_time_valid)
+ sym_requeue_awaiting_cmds(np);
+
+ SYM_UNLOCK_HCB(np, flags);
+ SYM_UNLOCK_SCSI(np, flags1);
+}
+
+
+/*
+ * What the eh thread wants us to perform.
+ */
+#define SYM_EH_ABORT 0
+#define SYM_EH_DEVICE_RESET 1
+#define SYM_EH_BUS_RESET 2
+#define SYM_EH_HOST_RESET 3
+
+/*
+ * What we will do regarding the involved SCSI command.
+ */
+#define SYM_EH_DO_IGNORE 0
+#define SYM_EH_DO_COMPLETE 1
+#define SYM_EH_DO_WAIT 2
+
+/*
+ * Our general completion handler.
+ */
+static void __sym_eh_done(Scsi_Cmnd *cmd, int timed_out)
+{
+ struct sym_eh_wait *ep = SYM_UCMD_PTR(cmd)->eh_wait;
+ if (!ep)
+ return;
+
+ /* Try to avoid a race here (not 100% safe) */
+ if (!timed_out) {
+ ep->timed_out = 0;
+ if (ep->to_do == SYM_EH_DO_WAIT && !del_timer(&ep->timer))
+ return;
+ }
+
+ /* Revert everything */
+ SYM_UCMD_PTR(cmd)->eh_wait = 0;
+ cmd->scsi_done = ep->old_done;
+
+ /* Wake up the eh thread if it wants to sleep */
+ if (ep->to_do == SYM_EH_DO_WAIT)
+ up(&ep->sem);
+}
+
+/*
+ * scsi_done() alias when error recovery is in progress.
+ */
+static void sym_eh_done(Scsi_Cmnd *cmd) { __sym_eh_done(cmd, 0); }
+
+/*
+ * Some timeout handler to avoid waiting too long.
+ */
+static void sym_eh_timeout(u_long p) { __sym_eh_done((Scsi_Cmnd *)p, 1); }
+
+/*
+ * Generic method for our eh processing.
+ * The 'op' argument tells what we have to do.
+ */
+static int sym_eh_handler(int op, char *opname, Scsi_Cmnd *cmd)
+{
+ hcb_p np = SYM_SOFTC_PTR(cmd);
+ unsigned long flags;
+ SYM_QUEHEAD *qp;
+ int to_do = SYM_EH_DO_IGNORE;
+ int sts = -1;
+ struct sym_eh_wait eh, *ep = &eh;
+ char devname[20];
+
+ sprintf(devname, "%s:%d:%d", sym_name(np), cmd->target, cmd->lun);
+
+ printf_warning("%s: %s operation started.\n", devname, opname);
+
+ SYM_LOCK_HCB(np, flags);
+
+#if 0
+ /* This one should be the result of some race, thus to ignore */
+ if (cmd->serial_number != cmd->serial_number_at_timeout)
+ goto prepare;
+#endif
+
+ /* This one is not queued to the core driver -> to complete here */
+ FOR_EACH_QUEUED_ELEMENT(&np->s.wait_cmdq, qp) {
+ if (SYM_SCMD_PTR(qp) == cmd) {
+ to_do = SYM_EH_DO_COMPLETE;
+ goto prepare;
+ }
+ }
+
+ /* This one is queued in some place -> to wait for completion */
+ FOR_EACH_QUEUED_ELEMENT(&np->busy_ccbq, qp) {
+ ccb_p cp = sym_que_entry(qp, struct sym_ccb, link_ccbq);
+ if (cp->cam_ccb == cmd) {
+ to_do = SYM_EH_DO_WAIT;
+ goto prepare;
+ }
+ }
+
+prepare:
+ /* Prepare stuff to either ignore, complete or wait for completion */
+ switch(to_do) {
+ default:
+ case SYM_EH_DO_IGNORE:
+ goto finish;
+ break;
+ case SYM_EH_DO_WAIT:
+#if LINUX_VERSION_CODE > LinuxVersionCode(2,3,0)
+ init_MUTEX_LOCKED(&ep->sem);
+#else
+ ep->sem = MUTEX_LOCKED;
+#endif
+ /* fall through */
+ case SYM_EH_DO_COMPLETE:
+ ep->old_done = cmd->scsi_done;
+ cmd->scsi_done = sym_eh_done;
+ SYM_UCMD_PTR(cmd)->eh_wait = ep;
+ }
+
+ /* Try to proceed the operation we have been asked for */
+ sts = -1;
+ switch(op) {
+ case SYM_EH_ABORT:
+ sts = sym_abort_scsiio(np, cmd, 1);
+ break;
+ case SYM_EH_DEVICE_RESET:
+ sts = sym_reset_scsi_target(np, cmd->target);
+ break;
+ case SYM_EH_BUS_RESET:
+ sym_reset_scsi_bus(np, 1);
+ sts = 0;
+ break;
+ case SYM_EH_HOST_RESET:
+ sym_reset_scsi_bus(np, 0);
+ sym_start_up (np, 1);
+ sts = 0;
+ break;
+ default:
+ break;
+ }
+
+ /* On error, restore everything and cross fingers :) */
+ if (sts) {
+ SYM_UCMD_PTR(cmd)->eh_wait = 0;
+ cmd->scsi_done = ep->old_done;
+ to_do = SYM_EH_DO_IGNORE;
+ }
+
+finish:
+ ep->to_do = to_do;
+ /* Complete the command with locks held as required by the driver */
+ if (to_do == SYM_EH_DO_COMPLETE)
+ sym_xpt_done2(np, cmd, CAM_REQ_ABORTED);
+
+ SYM_UNLOCK_HCB(np, flags);
+
+ /* Wait for completion with locks released, as required by kernel */
+ if (to_do == SYM_EH_DO_WAIT) {
+ init_timer(&ep->timer);
+ ep->timer.expires = jiffies + (5*HZ);
+ ep->timer.function = sym_eh_timeout;
+ ep->timer.data = (u_long)cmd;
+ ep->timed_out = 1; /* Be pessimistic for once :) */
+ add_timer(&ep->timer);
+ SYM_UNLOCK_SCSI_NORESTORE(np);
+ down(&ep->sem);
+ SYM_LOCK_SCSI_NOSAVE(np);
+ if (ep->timed_out)
+ sts = -2;
+ }
+ printf_warning("%s: %s operation %s.\n", devname, opname,
+ sts==0?"complete":sts==-2?"timed-out":"failed");
+ return sts? SCSI_FAILED : SCSI_SUCCESS;
+}
+
+
+/*
+ * Error handlers called from the eh thread (one thread per HBA).
+ */
+int sym53c8xx_eh_abort_handler(Scsi_Cmnd *cmd)
+{
+ return sym_eh_handler(SYM_EH_ABORT, "ABORT", cmd);
+}
+
+int sym53c8xx_eh_device_reset_handler(Scsi_Cmnd *cmd)
+{
+ return sym_eh_handler(SYM_EH_DEVICE_RESET, "DEVICE RESET", cmd);
+}
+
+int sym53c8xx_eh_bus_reset_handler(Scsi_Cmnd *cmd)
+{
+ return sym_eh_handler(SYM_EH_BUS_RESET, "BUS RESET", cmd);
+}
+
+int sym53c8xx_eh_host_reset_handler(Scsi_Cmnd *cmd)
+{
+ return sym_eh_handler(SYM_EH_HOST_RESET, "HOST RESET", cmd);
+}
+
+/*
+ * Tune device queuing depth, according to various limits.
+ */
+static void
+sym_tune_dev_queuing(hcb_p np, int target, int lun, u_short reqtags)
+{
+ tcb_p tp = &np->target[target];
+ lcb_p lp = sym_lp(np, tp, lun);
+ u_short oldtags;
+
+ if (!lp)
+ return;
+
+ oldtags = lp->s.reqtags;
+
+ if (reqtags > lp->s.scdev_depth)
+ reqtags = lp->s.scdev_depth;
+
+ lp->started_limit = reqtags ? reqtags : 2;
+ lp->started_max = 1;
+ lp->s.reqtags = reqtags;
+
+ if (reqtags != oldtags) {
+ printf_info("%s:%d:%d: "
+ "tagged command queuing %s, command queue depth %d.\n",
+ sym_name(np), target, lun,
+ lp->s.reqtags ? "enabled" : "disabled",
+ lp->started_limit);
+ }
+}
+
+#ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
+/*
+ * Linux select queue depths function
+ */
+#define DEF_DEPTH (sym_driver_setup.max_tag)
+#define ALL_TARGETS -2
+#define NO_TARGET -1
+#define ALL_LUNS -2
+#define NO_LUN -1
+
+static int device_queue_depth(hcb_p np, int target, int lun)
+{
+ int c, h, t, u, v;
+ char *p = sym_driver_setup.tag_ctrl;
+ char *ep;
+
+ h = -1;
+ t = NO_TARGET;
+ u = NO_LUN;
+ while ((c = *p++) != 0) {
+ v = simple_strtoul(p, &ep, 0);
+ switch(c) {
+ case '/':
+ ++h;
+ t = ALL_TARGETS;
+ u = ALL_LUNS;
+ break;
+ case 't':
+ if (t != target)
+ t = (target == v) ? v : NO_TARGET;
+ u = ALL_LUNS;
+ break;
+ case 'u':
+ if (u != lun)
+ u = (lun == v) ? v : NO_LUN;
+ break;
+ case 'q':
+ if (h == np->s.unit &&
+ (t == ALL_TARGETS || t == target) &&
+ (u == ALL_LUNS || u == lun))
+ return v;
+ break;
+ case '-':
+ t = ALL_TARGETS;
+ u = ALL_LUNS;
+ break;
+ default:
+ break;
+ }
+ p = ep;
+ }
+ return DEF_DEPTH;
+}
+#else
+#define device_queue_depth(np, t, l) (sym_driver_setup.max_tag)
+#endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
+
+/*
+ * Linux entry point for device queue sizing.
+ */
+static void
+sym53c8xx_select_queue_depths(struct Scsi_Host *host,
+ struct scsi_device *devlist)
+{
+ struct scsi_device *device;
+
+ for (device = devlist; device; device = device->next) {
+ hcb_p np;
+ tcb_p tp;
+ lcb_p lp;
+ int reqtags;
+
+ if (device->host != host)
+ continue;
+
+ np = ((struct host_data *) host->hostdata)->ncb;
+ tp = &np->target[device->id];
+
+ /*
+ * Get user settings for transfer parameters.
+ */
+ tp->inq_byte7_valid = (INQ7_SYNC|INQ7_WIDE16);
+ sym_update_trans_settings(np, tp);
+
+ /*
+ * Allocate the LCB if not yet.
+ * If it fail, we may well be in the sh*t. :)
+ */
+ lp = sym_alloc_lcb(np, device->id, device->lun);
+ if (!lp) {
+ device->queue_depth = 1;
+ continue;
+ }
+
+ /*
+ * Get user flags.
+ */
+ lp->curr_flags = lp->user_flags;
+
+ /*
+ * Select queue depth from driver setup.
+ * Donnot use more than configured by user.
+ * Use at least 2.
+ * Donnot use more than our maximum.
+ */
+ reqtags = device_queue_depth(np, device->id, device->lun);
+ if (reqtags > tp->usrtags)
+ reqtags = tp->usrtags;
+ if (!device->tagged_supported)
+ reqtags = 0;
+#if 1 /* Avoid to locally queue commands for no good reasons */
+ if (reqtags > SYM_CONF_MAX_TAG)
+ reqtags = SYM_CONF_MAX_TAG;
+ device->queue_depth = reqtags ? reqtags : 2;
+#else
+ device->queue_depth = reqtags ? SYM_CONF_MAX_TAG : 2;
+#endif
+ lp->s.scdev_depth = device->queue_depth;
+ sym_tune_dev_queuing(np, device->id, device->lun, reqtags);
+ }
+}
+
+/*
+ * Linux entry point for info() function
+ */
+const char *sym53c8xx_info (struct Scsi_Host *host)
+{
+ return sym_driver_name();
+}
+
+
+#ifdef SYM_LINUX_PROC_INFO_SUPPORT
+/*
+ * Proc file system stuff
+ *
+ * A read operation returns adapter information.
+ * A write operation is a control command.
+ * The string is parsed in the driver code and the command is passed
+ * to the sym_usercmd() function.
+ */
+
+#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
+
+struct sym_usrcmd {
+ u_long target;
+ u_long lun;
+ u_long data;
+ u_long cmd;
+};
+
+#define UC_SETSYNC 10
+#define UC_SETTAGS 11
+#define UC_SETDEBUG 12
+#define UC_SETWIDE 14
+#define UC_SETFLAG 15
+#define UC_SETVERBOSE 17
+#define UC_RESETDEV 18
+#define UC_CLEARDEV 19
+
+static void sym_exec_user_command (hcb_p np, struct sym_usrcmd *uc)
+{
+ tcb_p tp;
+ int t, l;
+
+ switch (uc->cmd) {
+ case 0: return;
+
+#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
+ case UC_SETDEBUG:
+ sym_debug_flags = uc->data;
+ break;
+#endif
+ case UC_SETVERBOSE:
+ np->verbose = uc->data;
+ break;
+ default:
+ /*
+ * We assume that other commands apply to targets.
+ * This should always be the case and avoid the below
+ * 4 lines to be repeated 6 times.
+ */
+ for (t = 0; t < SYM_CONF_MAX_TARGET; t++) {
+ if (!((uc->target >> t) & 1))
+ continue;
+ tp = &np->target[t];
+
+ switch (uc->cmd) {
+
+ case UC_SETSYNC:
+ if (!uc->data || uc->data >= 255) {
+ tp->tinfo.goal.options = 0;
+ tp->tinfo.goal.offset = 0;
+ break;
+ }
+ if (uc->data <= 9 && np->minsync_dt) {
+ if (uc->data < np->minsync_dt)
+ uc->data = np->minsync_dt;
+ tp->tinfo.goal.options = PPR_OPT_DT;
+ tp->tinfo.goal.width = 1;
+ tp->tinfo.goal.period = uc->data;
+ tp->tinfo.goal.offset = np->maxoffs_dt;
+ }
+ else {
+ if (uc->data < np->minsync)
+ uc->data = np->minsync;
+ tp->tinfo.goal.options = 0;
+ tp->tinfo.goal.period = uc->data;
+ tp->tinfo.goal.offset = np->maxoffs;
+ }
+ break;
+ case UC_SETWIDE:
+ tp->tinfo.goal.width = uc->data ? 1 : 0;
+ break;
+ case UC_SETTAGS:
+ for (l = 0; l < SYM_CONF_MAX_LUN; l++)
+ sym_tune_dev_queuing(np, t,l, uc->data);
+ break;
+ case UC_RESETDEV:
+ tp->to_reset = 1;
+ np->istat_sem = SEM;
+ OUTB (nc_istat, SIGP|SEM);
+ break;
+ case UC_CLEARDEV:
+ for (l = 0; l < SYM_CONF_MAX_LUN; l++) {
+ lcb_p lp = sym_lp(np, tp, l);
+ if (lp) lp->to_clear = 1;
+ }
+ np->istat_sem = SEM;
+ OUTB (nc_istat, SIGP|SEM);
+ break;
+ case UC_SETFLAG:
+ tp->usrflags = uc->data;
+ break;
+ }
+ }
+ break;
+ }
+}
+
+#define is_digit(c) ((c) >= '0' && (c) <= '9')
+#define digit_to_bin(c) ((c) - '0')
+#define is_space(c) ((c) == ' ' || (c) == '\t')
+
+static int skip_spaces(char *ptr, int len)
+{
+ int cnt, c;
+
+ for (cnt = len; cnt > 0 && (c = *ptr++) && is_space(c); cnt--);
+
+ return (len - cnt);
+}
+
+static int get_int_arg(char *ptr, int len, u_long *pv)
+{
+ int cnt, c;
+ u_long v;
+
+ for (v = 0, cnt = len; cnt > 0 && (c = *ptr++) && is_digit(c); cnt--) {
+ v = (v * 10) + digit_to_bin(c);
+ }
+
+ if (pv)
+ *pv = v;
+
+ return (len - cnt);
+}
+
+static int is_keyword(char *ptr, int len, char *verb)
+{
+ int verb_len = strlen(verb);
+
+ if (len >= strlen(verb) && !memcmp(verb, ptr, verb_len))
+ return verb_len;
+ else
+ return 0;
+
+}
+
+#define SKIP_SPACES(min_spaces) \
+ if ((arg_len = skip_spaces(ptr, len)) < (min_spaces)) \
+ return -EINVAL; \
+ ptr += arg_len; len -= arg_len;
+
+#define GET_INT_ARG(v) \
+ if (!(arg_len = get_int_arg(ptr, len, &(v)))) \
+ return -EINVAL; \
+ ptr += arg_len; len -= arg_len;
+
+
+/*
+ * Parse a control command
+ */
+
+static int sym_user_command(hcb_p np, char *buffer, int length)
+{
+ char *ptr = buffer;
+ int len = length;
+ struct sym_usrcmd cmd, *uc = &cmd;
+ int arg_len;
+ u_long target;
+
+ bzero(uc, sizeof(*uc));
+
+ if (len > 0 && ptr[len-1] == '\n')
+ --len;
+
+ if ((arg_len = is_keyword(ptr, len, "setsync")) != 0)
+ uc->cmd = UC_SETSYNC;
+ else if ((arg_len = is_keyword(ptr, len, "settags")) != 0)
+ uc->cmd = UC_SETTAGS;
+ else if ((arg_len = is_keyword(ptr, len, "setverbose")) != 0)
+ uc->cmd = UC_SETVERBOSE;
+ else if ((arg_len = is_keyword(ptr, len, "setwide")) != 0)
+ uc->cmd = UC_SETWIDE;
+#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
+ else if ((arg_len = is_keyword(ptr, len, "setdebug")) != 0)
+ uc->cmd = UC_SETDEBUG;
+#endif
+ else if ((arg_len = is_keyword(ptr, len, "setflag")) != 0)
+ uc->cmd = UC_SETFLAG;
+ else if ((arg_len = is_keyword(ptr, len, "resetdev")) != 0)
+ uc->cmd = UC_RESETDEV;
+ else if ((arg_len = is_keyword(ptr, len, "cleardev")) != 0)
+ uc->cmd = UC_CLEARDEV;
+ else
+ arg_len = 0;
+
+#ifdef DEBUG_PROC_INFO
+printk("sym_user_command: arg_len=%d, cmd=%ld\n", arg_len, uc->cmd);
+#endif
+
+ if (!arg_len)
+ return -EINVAL;
+ ptr += arg_len; len -= arg_len;
+
+ switch(uc->cmd) {
+ case UC_SETSYNC:
+ case UC_SETTAGS:
+ case UC_SETWIDE:
+ case UC_SETFLAG:
+ case UC_RESETDEV:
+ case UC_CLEARDEV:
+ SKIP_SPACES(1);
+ if ((arg_len = is_keyword(ptr, len, "all")) != 0) {
+ ptr += arg_len; len -= arg_len;
+ uc->target = ~0;
+ } else {
+ GET_INT_ARG(target);
+ uc->target = (1<<target);
+#ifdef DEBUG_PROC_INFO
+printk("sym_user_command: target=%ld\n", target);
+#endif
+ }
+ break;
+ }
+
+ switch(uc->cmd) {
+ case UC_SETVERBOSE:
+ case UC_SETSYNC:
+ case UC_SETTAGS:
+ case UC_SETWIDE:
+ SKIP_SPACES(1);
+ GET_INT_ARG(uc->data);
+#ifdef DEBUG_PROC_INFO
+printk("sym_user_command: data=%ld\n", uc->data);
+#endif
+ break;
+#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
+ case UC_SETDEBUG:
+ while (len > 0) {
+ SKIP_SPACES(1);
+ if ((arg_len = is_keyword(ptr, len, "alloc")))
+ uc->data |= DEBUG_ALLOC;
+ else if ((arg_len = is_keyword(ptr, len, "phase")))
+ uc->data |= DEBUG_PHASE;
+ else if ((arg_len = is_keyword(ptr, len, "queue")))
+ uc->data |= DEBUG_QUEUE;
+ else if ((arg_len = is_keyword(ptr, len, "result")))
+ uc->data |= DEBUG_RESULT;
+ else if ((arg_len = is_keyword(ptr, len, "scatter")))
+ uc->data |= DEBUG_SCATTER;
+ else if ((arg_len = is_keyword(ptr, len, "script")))
+ uc->data |= DEBUG_SCRIPT;
+ else if ((arg_len = is_keyword(ptr, len, "tiny")))
+ uc->data |= DEBUG_TINY;
+ else if ((arg_len = is_keyword(ptr, len, "timing")))
+ uc->data |= DEBUG_TIMING;
+ else if ((arg_len = is_keyword(ptr, len, "nego")))
+ uc->data |= DEBUG_NEGO;
+ else if ((arg_len = is_keyword(ptr, len, "tags")))
+ uc->data |= DEBUG_TAGS;
+ else if ((arg_len = is_keyword(ptr, len, "pointer")))
+ uc->data |= DEBUG_POINTER;
+ else
+ return -EINVAL;
+ ptr += arg_len; len -= arg_len;
+ }
+#ifdef DEBUG_PROC_INFO
+printk("sym_user_command: data=%ld\n", uc->data);
+#endif
+ break;
+#endif /* SYM_LINUX_DEBUG_CONTROL_SUPPORT */
+ case UC_SETFLAG:
+ while (len > 0) {
+ SKIP_SPACES(1);
+ if ((arg_len = is_keyword(ptr, len, "no_disc")))
+ uc->data &= ~SYM_DISC_ENABLED;
+ else
+ return -EINVAL;
+ ptr += arg_len; len -= arg_len;
+ }
+ break;
+ default:
+ break;
+ }
+
+ if (len)
+ return -EINVAL;
+ else {
+ long flags;
+
+ SYM_LOCK_HCB(np, flags);
+ sym_exec_user_command (np, uc);
+ SYM_UNLOCK_HCB(np, flags);
+ }
+ return length;
+}
+
+#endif /* SYM_LINUX_USER_COMMAND_SUPPORT */
+
+
+#ifdef SYM_LINUX_USER_INFO_SUPPORT
+/*
+ * Informations through the proc file system.
+ */
+struct info_str {
+ char *buffer;
+ int length;
+ int offset;
+ int pos;
+};
+
+static void copy_mem_info(struct info_str *info, char *data, int len)
+{
+ if (info->pos + len > info->length)
+ len = info->length - info->pos;
+
+ if (info->pos + len < info->offset) {
+ info->pos += len;
+ return;
+ }
+ if (info->pos < info->offset) {
+ data += (info->offset - info->pos);
+ len -= (info->offset - info->pos);
+ }
+
+ if (len > 0) {
+ memcpy(info->buffer + info->pos, data, len);
+ info->pos += len;
+ }
+}
+
+static int copy_info(struct info_str *info, char *fmt, ...)
+{
+ va_list args;
+ char buf[81];
+ int len;
+
+ va_start(args, fmt);
+ len = vsprintf(buf, fmt, args);
+ va_end(args);
+
+ copy_mem_info(info, buf, len);
+ return len;
+}
+
+/*
+ * Copy formatted information into the input buffer.
+ */
+static int sym_host_info(hcb_p np, char *ptr, off_t offset, int len)
+{
+ struct info_str info;
+
+ info.buffer = ptr;
+ info.length = len;
+ info.offset = offset;
+ info.pos = 0;
+
+ copy_info(&info, "Chip " NAME53C "%s, device id 0x%x, "
+ "revision id 0x%x\n",
+ np->s.chip_name, np->device_id, np->revision_id);
+ copy_info(&info, "On PCI bus %d, device %d, function %d, "
+#ifdef __sparc__
+ "IRQ %s\n",
+#else
+ "IRQ %d\n",
+#endif
+ np->s.bus, (np->s.device_fn & 0xf8) >> 3, np->s.device_fn & 7,
+#ifdef __sparc__
+ __irq_itoa(np->s.irq));
+#else
+ (int) np->s.irq);
+#endif
+ copy_info(&info, "Min. period factor %d, %s SCSI BUS%s\n",
+ (int) (np->minsync_dt ? np->minsync_dt : np->minsync),
+ np->maxwide ? "Wide" : "Narrow",
+ np->minsync_dt ? ", DT capable" : "");
+
+ copy_info(&info, "Max. started commands %d, "
+ "max. commands per LUN %d\n",
+ SYM_CONF_MAX_START, SYM_CONF_MAX_TAG);
+
+ return info.pos > info.offset? info.pos - info.offset : 0;
+}
+#endif /* SYM_LINUX_USER_INFO_SUPPORT */
+
+/*
+ * Entry point of the scsi proc fs of the driver.
+ * - func = 0 means read (returns adapter infos)
+ * - func = 1 means write (not yet merget from sym53c8xx)
+ */
+static int sym53c8xx_proc_info(char *buffer, char **start, off_t offset,
+ int length, int hostno, int func)
+{
+ struct Scsi_Host *host;
+ struct host_data *host_data;
+ hcb_p np = 0;
+ int retv;
+
+ for (host = first_host; host; host = host->next) {
+ if (host->hostt != first_host->hostt)
+ continue;
+ if (host->host_no == hostno) {
+ host_data = (struct host_data *) host->hostdata;
+ np = host_data->ncb;
+ break;
+ }
+ }
+
+ if (!np)
+ return -EINVAL;
+
+ if (func) {
+#ifdef SYM_LINUX_USER_COMMAND_SUPPORT
+ retv = sym_user_command(np, buffer, length);
+#else
+ retv = -EINVAL;
+#endif
+ }
+ else {
+ if (start)
+ *start = buffer;
+#ifdef SYM_LINUX_USER_INFO_SUPPORT
+ retv = sym_host_info(np, buffer, offset, length);
+#else
+ retv = -EINVAL;
+#endif
+ }
+
+ return retv;
+}
+#endif /* SYM_LINUX_PROC_INFO_SUPPORT */
+
+/*
+ * Free controller resources.
+ */
+static void sym_free_resources(hcb_p np)
+{
+ /*
+ * Free O/S specific resources.
+ */
+ if (np->s.irq)
+ free_irq(np->s.irq, np);
+ if (np->s.io_port)
+ release_region(np->s.io_port, np->s.io_ws);
+#ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
+ if (np->s.mmio_va)
+ pci_unmap_mem(np->s.mmio_va, np->s.io_ws);
+ if (np->s.ram_va)
+ pci_unmap_mem(np->s.ram_va, np->ram_ws);
+#endif
+ /*
+ * Free O/S independant resources.
+ */
+ sym_hcb_free(np);
+
+ sym_mfree_dma(np, sizeof(*np), "HCB");
+}
+
+/*
+ * Ask/tell the system about DMA addressing.
+ */
+#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
+static int sym_setup_bus_dma_mask(hcb_p np)
+{
+#if LINUX_VERSION_CODE < LinuxVersionCode(2,4,3)
+ if (!pci_dma_supported(np->s.device, 0xffffffffUL))
+ goto out_err32;
+#else
+#if SYM_CONF_DMA_ADDRESSING_MODE == 0
+ if (pci_set_dma_mask(np->s.device, 0xffffffffUL))
+ goto out_err32;
+#else
+#if SYM_CONF_DMA_ADDRESSING_MODE == 1
+#define PciDmaMask 0xffffffffff
+#elif SYM_CONF_DMA_ADDRESSING_MODE == 2
+#define PciDmaMask 0xffffffffffffffff
+#endif
+ if (np->features & FE_DAC) {
+ if (!pci_set_dma_mask(np->s.device, PciDmaMask)) {
+ np->use_dac = 1;
+ printf_info("%s: using 64 bit DMA addressing\n",
+ sym_name(np));
+ }
+ else {
+ if (!pci_set_dma_mask(np->s.device, 0xffffffffUL))
+ goto out_err32;
+ }
+ }
+#undef PciDmaMask
+#endif
+#endif
+ return 0;
+
+out_err32:
+ printf_warning("%s: 32 BIT DMA ADDRESSING NOT SUPPORTED\n",
+ sym_name(np));
+ return -1;
+}
+#endif /* SYM_LINUX_DYNAMIC_DMA_MAPPING */
+
+/*
+ * Host attach and initialisations.
+ *
+ * Allocate host data and ncb structure.
+ * Request IO region and remap MMIO region.
+ * Do chip initialization.
+ * If all is OK, install interrupt handling and
+ * start the timer daemon.
+ */
+static int __init
+sym_attach (Scsi_Host_Template *tpnt, int unit, sym_device *dev)
+{
+ struct host_data *host_data;
+ hcb_p np = 0;
+ struct Scsi_Host *instance = 0;
+ u_long flags = 0;
+ sym_nvram *nvram = dev->nvram;
+ struct sym_fw *fw;
+
+ printk(KERN_INFO
+ "sym%d: <%s> rev 0x%x on pci bus %d device %d function %d "
+#ifdef __sparc__
+ "irq %s\n",
+#else
+ "irq %d\n",
+#endif
+ unit, dev->chip.name, dev->chip.revision_id,
+ dev->s.bus, (dev->s.device_fn & 0xf8) >> 3,
+ dev->s.device_fn & 7,
+#ifdef __sparc__
+ __irq_itoa(dev->s.irq));
+#else
+ dev->s.irq);
+#endif
+
+ /*
+ * Get the firmware for this chip.
+ */
+ fw = sym_find_firmware(&dev->chip);
+ if (!fw)
+ goto attach_failed;
+
+ /*
+ * Allocate host_data structure
+ */
+ if (!(instance = scsi_register(tpnt, sizeof(*host_data))))
+ goto attach_failed;
+ host_data = (struct host_data *) instance->hostdata;
+
+ /*
+ * Allocate immediately the host control block,
+ * since we are only expecting to succeed. :)
+ * We keep track in the HCB of all the resources that
+ * are to be released on error.
+ */
+#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
+ np = __sym_calloc_dma(dev->pdev, sizeof(*np), "HCB");
+ if (np) {
+ np->s.device = dev->pdev;
+ np->bus_dmat = dev->pdev; /* Result in 1 DMA pool per HBA */
+ }
+ else
+ goto attach_failed;
+#else
+ np = sym_calloc_dma(sizeof(*np), "HCB");
+ if (!np)
+ goto attach_failed;
+#endif
+ host_data->ncb = np;
+
+ SYM_INIT_LOCK_HCB(np);
+
+ /*
+ * Copy some useful infos to the HCB.
+ */
+ np->hcb_ba = vtobus(np);
+ np->verbose = sym_driver_setup.verbose;
+ np->s.device = dev->pdev;
+ np->s.unit = unit;
+ np->device_id = dev->chip.device_id;
+ np->revision_id = dev->chip.revision_id;
+ np->s.bus = dev->s.bus;
+ np->s.device_fn = dev->s.device_fn;
+ np->features = dev->chip.features;
+ np->clock_divn = dev->chip.nr_divisor;
+ np->maxoffs = dev->chip.offset_max;
+ np->maxburst = dev->chip.burst_max;
+ np->myaddr = dev->host_id;
+
+ /*
+ * Edit its name.
+ */
+ strncpy(np->s.chip_name, dev->chip.name, sizeof(np->s.chip_name)-1);
+ sprintf(np->s.inst_name, "sym%d", np->s.unit);
+
+ /*
+ * Ask/tell the system about DMA addressing.
+ */
+#ifdef SYM_LINUX_DYNAMIC_DMA_MAPPING
+ if (sym_setup_bus_dma_mask(np))
+ goto attach_failed;
+#endif
+
+ /*
+ * Try to map the controller chip to
+ * virtual and physical memory.
+ */
+ np->mmio_ba = (u32)dev->s.base;
+ np->s.io_ws = (np->features & FE_IO256)? 256 : 128;
+
+#ifndef SYM_CONF_IOMAPPED
+ np->s.mmio_va = pci_map_mem(dev->s.base_c, np->s.io_ws);
+ if (!np->s.mmio_va) {
+ printf_err("%s: can't map PCI MMIO region\n", sym_name(np));
+ goto attach_failed;
+ }
+ else if (sym_verbose > 1)
+ printf_info("%s: using memory mapped IO\n", sym_name(np));
+#endif /* !defined SYM_CONF_IOMAPPED */
+
+ /*
+ * Try to map the controller chip into iospace.
+ */
+ if (dev->s.io_port) {
+ request_region(dev->s.io_port, np->s.io_ws, NAME53C8XX);
+ np->s.io_port = dev->s.io_port;
+ }
+
+ /*
+ * Map on-chip RAM if present and supported.
+ */
+ if (!(np->features & FE_RAM))
+ dev->s.base_2 = 0;
+ if (dev->s.base_2) {
+ np->ram_ba = (u32)dev->s.base_2;
+ if (np->features & FE_RAM8K)
+ np->ram_ws = 8192;
+ else
+ np->ram_ws = 4096;
+#ifndef SYM_OPT_NO_BUS_MEMORY_MAPPING
+ np->s.ram_va = pci_map_mem(dev->s.base_2_c, np->ram_ws);
+ if (!np->s.ram_va) {
+ printf_err("%s: can't map PCI MEMORY region\n",
+ sym_name(np));
+ goto attach_failed;
+ }
+#endif
+ }
+
+ /*
+ * Perform O/S independant stuff.
+ */
+ if (sym_hcb_attach(np, fw, nvram))
+ goto attach_failed;
+
+
+ /*
+ * Install the interrupt handler.
+ * If we synchonize the C code with SCRIPTS on interrupt,
+ * we donnot want to share the INTR line at all.
+ */
+ if (request_irq(dev->s.irq, sym53c8xx_intr, SA_SHIRQ,
+ NAME53C8XX, np)) {
+ printf_err("%s: request irq %d failure\n",
+ sym_name(np), dev->s.irq);
+ goto attach_failed;
+ }
+ np->s.irq = dev->s.irq;
+
+ /*
+ * After SCSI devices have been opened, we cannot
+ * reset the bus safely, so we do it here.
+ */
+ SYM_LOCK_HCB(np, flags);
+ if (sym_reset_scsi_bus(np, 0)) {
+ printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, "
+ "TERMINATION, DEVICE POWER etc.!\n", sym_name(np));
+ SYM_UNLOCK_HCB(np, flags);
+ goto attach_failed;
+ }
+
+ /*
+ * Initialize some queue headers.
+ */
+ sym_que_init(&np->s.wait_cmdq);
+ sym_que_init(&np->s.busy_cmdq);
+
+ /*
+ * Start the SCRIPTS.
+ */
+ sym_start_up (np, 1);
+
+ /*
+ * Start the timer daemon
+ */
+ init_timer(&np->s.timer);
+ np->s.timer.data = (unsigned long) np;
+ np->s.timer.function = sym53c8xx_timer;
+ np->s.lasttime=0;
+ sym_timer (np);
+
+ /*
+ * Done.
+ */
+ if (!first_host)
+ first_host = instance;
+
+ /*
+ * Fill Linux host instance structure
+ * and return success.
+ */
+ instance->max_channel = 0;
+ instance->this_id = np->myaddr;
+ instance->max_id = np->maxwide ? 16 : 8;
+ instance->max_lun = SYM_CONF_MAX_LUN;
+#ifndef SYM_CONF_IOMAPPED
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,29)
+ instance->base = (unsigned long) np->s.mmio_va;
+#else
+ instance->base = (char *) np->s.mmio_va;
+#endif
+#endif
+ instance->irq = np->s.irq;
+ instance->unique_id = np->s.io_port;
+ instance->io_port = np->s.io_port;
+ instance->n_io_port = np->s.io_ws;
+ instance->dma_channel = 0;
+ instance->cmd_per_lun = SYM_CONF_MAX_TAG;
+ instance->can_queue = (SYM_CONF_MAX_START-2);
+ instance->sg_tablesize = SYM_CONF_MAX_SG;
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,0)
+ instance->max_cmd_len = 16;
+#endif
+ instance->select_queue_depths = sym53c8xx_select_queue_depths;
+
+ SYM_UNLOCK_HCB(np, flags);
+
+ scsi_set_pci_device(instance, dev->pdev);
+
+ /*
+ * Now let the generic SCSI driver
+ * look for the SCSI devices on the bus ..
+ */
+ return 0;
+
+attach_failed:
+ if (!instance) return -1;
+ printf_info("%s: giving up ...\n", sym_name(np));
+ if (np)
+ sym_free_resources(np);
+ scsi_unregister(instance);
+
+ return -1;
+ }
+
+
+/*
+ * Detect and try to read SYMBIOS and TEKRAM NVRAM.
+ */
+#if SYM_CONF_NVRAM_SUPPORT
+static void __init sym_get_nvram(sym_device *devp, sym_nvram *nvp)
+{
+ if (!nvp)
+ return;
+
+ devp->nvram = nvp;
+ devp->device_id = devp->chip.device_id;
+ nvp->type = 0;
+
+ /*
+ * Get access to chip IO registers
+ */
+#ifdef SYM_CONF_IOMAPPED
+ request_region(devp->s.io_port, 128, NAME53C8XX);
+#else
+ devp->s.mmio_va = pci_map_mem(devp->s.base_c, 128);
+ if (!devp->s.mmio_va)
+ return;
+#endif
+
+ /*
+ * Try to read SYMBIOS|TEKRAM nvram.
+ */
+ (void) sym_read_nvram(devp, nvp);
+
+ /*
+ * Release access to chip IO registers
+ */
+#ifdef SYM_CONF_IOMAPPED
+ release_region(devp->s.io_port, 128);
+#else
+ pci_unmap_mem((u_long) devp->s.mmio_va, 128ul);
+#endif
+}
+#endif /* SYM_CONF_NVRAM_SUPPORT */
+
+/*
+ * Driver setup from the boot command line
+ */
+#ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
+
+static struct sym_driver_setup
+ sym_driver_safe_setup __initdata = SYM_LINUX_DRIVER_SAFE_SETUP;
+#ifdef MODULE
+char *sym53c8xx = 0; /* command line passed by insmod */
+MODULE_PARM(sym53c8xx, "s");
+#endif
+
+static void __init sym53c8xx_print_driver_setup(void)
+{
+ printf_info (NAME53C8XX ": setup="
+ "mpar:%d,spar:%d,tags:%d,sync:%d,burst:%d,"
+ "led:%d,wide:%d,diff:%d,irqm:%d, buschk:%d\n",
+ sym_driver_setup.pci_parity,
+ sym_driver_setup.scsi_parity,
+ sym_driver_setup.max_tag,
+ sym_driver_setup.min_sync,
+ sym_driver_setup.burst_order,
+ sym_driver_setup.scsi_led,
+ sym_driver_setup.max_wide,
+ sym_driver_setup.scsi_diff,
+ sym_driver_setup.irq_mode,
+ sym_driver_setup.scsi_bus_check);
+ printf_info (NAME53C8XX ": setup="
+ "hostid:%d,offs:%d,luns:%d,pcifix:%d,revprob:%d,"
+ "verb:%d,debug:0x%x,setlle_delay:%d\n",
+ sym_driver_setup.host_id,
+ sym_driver_setup.max_offs,
+ sym_driver_setup.max_lun,
+ sym_driver_setup.pci_fix_up,
+ sym_driver_setup.reverse_probe,
+ sym_driver_setup.verbose,
+ sym_driver_setup.debug,
+ sym_driver_setup.settle_delay);
+#ifdef DEBUG_2_0_X
+MDELAY(5000);
+#endif
+};
+
+#define OPT_PCI_PARITY 1
+#define OPT_SCSI_PARITY 2
+#define OPT_MAX_TAG 3
+#define OPT_MIN_SYNC 4
+#define OPT_BURST_ORDER 5
+#define OPT_SCSI_LED 6
+#define OPT_MAX_WIDE 7
+#define OPT_SCSI_DIFF 8
+#define OPT_IRQ_MODE 9
+#define OPT_SCSI_BUS_CHECK 10
+#define OPT_HOST_ID 11
+#define OPT_MAX_OFFS 12
+#define OPT_MAX_LUN 13
+#define OPT_PCI_FIX_UP 14
+
+#define OPT_REVERSE_PROBE 15
+#define OPT_VERBOSE 16
+#define OPT_DEBUG 17
+#define OPT_SETTLE_DELAY 18
+#define OPT_USE_NVRAM 19
+#define OPT_EXCLUDE 20
+#define OPT_SAFE_SETUP 21
+
+static char setup_token[] __initdata =
+ "mpar:" "spar:"
+ "tags:" "sync:"
+ "burst:" "led:"
+ "wide:" "diff:"
+ "irqm:" "buschk:"
+ "hostid:" "offset:"
+ "luns:" "pcifix:"
+ "revprob:" "verb:"
+ "debug:" "settle:"
+ "nvram:" "excl:"
+ "safe:"
+ ;
+
+#ifdef MODULE
+#define ARG_SEP ' '
+#else
+#define ARG_SEP ','
+#endif
+
+static int __init get_setup_token(char *p)
+{
+ char *cur = setup_token;
+ char *pc;
+ int i = 0;
+
+ while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
+ ++pc;
+ ++i;
+ if (!strncmp(p, cur, pc - cur))
+ return i;
+ cur = pc;
+ }
+ return 0;
+}
+#endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
+
+int __init sym53c8xx_setup(char *str)
+{
+#ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
+ char *cur = str;
+ char *pc, *pv;
+ unsigned long val;
+ int i, c;
+ int xi = 0;
+
+ while (cur != NULL && (pc = strchr(cur, ':')) != NULL) {
+ char *pe;
+
+ val = 0;
+ pv = pc;
+ c = *++pv;
+
+ if (c == 'n')
+ val = 0;
+ else if (c == 'y')
+ val = 1;
+ else
+ val = (int) simple_strtoul(pv, &pe, 0);
+
+ switch (get_setup_token(cur)) {
+ case OPT_MAX_TAG:
+ sym_driver_setup.max_tag = val;
+ if (!(pe && *pe == '/'))
+ break;
+ i = 0;
+ while (*pe && *pe != ARG_SEP &&
+ i < sizeof(sym_driver_setup.tag_ctrl)-1) {
+ sym_driver_setup.tag_ctrl[i++] = *pe++;
+ }
+ sym_driver_setup.tag_ctrl[i] = '\0';
+ break;
+ case OPT_SAFE_SETUP:
+ memcpy(&sym_driver_setup, &sym_driver_safe_setup,
+ sizeof(sym_driver_setup));
+ break;
+ case OPT_EXCLUDE:
+ if (xi < 8)
+ sym_driver_setup.excludes[xi++] = val;
+ break;
+
+#define __SIMPLE_OPTION(NAME, name) \
+ case OPT_ ## NAME : \
+ sym_driver_setup.name = val;\
+ break;
+
+ __SIMPLE_OPTION(PCI_PARITY, pci_parity)
+ __SIMPLE_OPTION(SCSI_PARITY, scsi_parity)
+ __SIMPLE_OPTION(MIN_SYNC, min_sync)
+ __SIMPLE_OPTION(BURST_ORDER, burst_order)
+ __SIMPLE_OPTION(SCSI_LED, scsi_led)
+ __SIMPLE_OPTION(MAX_WIDE, max_wide)
+ __SIMPLE_OPTION(SCSI_DIFF, scsi_diff)
+ __SIMPLE_OPTION(IRQ_MODE, irq_mode)
+ __SIMPLE_OPTION(SCSI_BUS_CHECK, scsi_bus_check)
+ __SIMPLE_OPTION(HOST_ID, host_id)
+ __SIMPLE_OPTION(MAX_OFFS, max_offs)
+ __SIMPLE_OPTION(MAX_LUN, max_lun)
+ __SIMPLE_OPTION(PCI_FIX_UP, pci_fix_up)
+ __SIMPLE_OPTION(REVERSE_PROBE, reverse_probe)
+ __SIMPLE_OPTION(VERBOSE, verbose)
+ __SIMPLE_OPTION(DEBUG, debug)
+ __SIMPLE_OPTION(SETTLE_DELAY, settle_delay)
+ __SIMPLE_OPTION(USE_NVRAM, use_nvram)
+
+#undef __SIMPLE_OPTION
+
+ default:
+ printk("sym53c8xx_setup: unexpected boot option '%.*s' ignored\n", (int)(pc-cur+1), cur);
+ break;
+ }
+
+ if ((cur = strchr(cur, ARG_SEP)) != NULL)
+ ++cur;
+ }
+#endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
+ return 1;
+}
+
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,3,13)
+#ifndef MODULE
+__setup("sym53c8xx=", sym53c8xx_setup);
+#endif
+#endif
+
+#ifdef SYM_CONF_PQS_PDS_SUPPORT
+/*
+ * Detect all NCR PQS/PDS boards and keep track of their bus nr.
+ *
+ * The NCR PQS or PDS card is constructed as a DEC bridge
+ * behind which sit a proprietary NCR memory controller and
+ * four or two 53c875s as separate devices. In its usual mode
+ * of operation, the 875s are slaved to the memory controller
+ * for all transfers. We can tell if an 875 is part of a
+ * PQS/PDS or not since if it is, it will be on the same bus
+ * as the memory controller. To operate with the Linux
+ * driver, the memory controller is disabled and the 875s
+ * freed to function independently. The only wrinkle is that
+ * the preset SCSI ID (which may be zero) must be read in from
+ * a special configuration space register of the 875
+ */
+#ifndef SYM_CONF_MAX_PQS_BUS
+#define SYM_CONF_MAX_PQS_BUS 16
+#endif
+static int pqs_bus[SYM_CONF_MAX_PQS_BUS] __initdata = { 0 };
+
+static void __init sym_detect_pqs_pds(void)
+{
+ short index;
+ pcidev_t dev = PCIDEV_NULL;
+
+ for(index=0; index < SYM_CONF_MAX_PQS_BUS; index++) {
+ u_char tmp;
+
+ dev = pci_find_device(0x101a, 0x0009, dev);
+ if (dev == PCIDEV_NULL) {
+ pqs_bus[index] = -1;
+ break;
+ }
+ printf_info(NAME53C8XX ": NCR PQS/PDS memory controller detected on bus %d\n", PciBusNumber(dev));
+ pci_read_config_byte(dev, 0x44, &tmp);
+ /* bit 1: allow individual 875 configuration */
+ tmp |= 0x2;
+ pci_write_config_byte(dev, 0x44, tmp);
+ pci_read_config_byte(dev, 0x45, &tmp);
+ /* bit 2: drive individual 875 interrupts to the bus */
+ tmp |= 0x4;
+ pci_write_config_byte(dev, 0x45, tmp);
+
+ pqs_bus[index] = PciBusNumber(dev);
+ }
+}
+#endif /* SYM_CONF_PQS_PDS_SUPPORT */
+
+/*
+ * Read and check the PCI configuration for any detected NCR
+ * boards and save data for attaching after all boards have
+ * been detected.
+ */
+static int __init
+sym53c8xx_pci_init(Scsi_Host_Template *tpnt, pcidev_t pdev, sym_device *device)
+{
+ u_short vendor_id, device_id, command, status_reg;
+ u_char cache_line_size;
+ u_char suggested_cache_line_size = 0;
+ u_char pci_fix_up = SYM_SETUP_PCI_FIX_UP;
+ u_char revision;
+ u_int irq;
+ u_long base, base_2, io_port;
+ u_long base_c, base_2_c;
+ int i;
+ sym_chip *chip;
+
+ /* Choose some short name for this device */
+ sprintf(device->s.inst_name, "sym.%d.%d.%d",
+ PciBusNumber(pdev),
+ (int) (PciDeviceFn(pdev) & 0xf8) >> 3,
+ (int) (PciDeviceFn(pdev) & 7));
+
+ /*
+ * Read needed minimal info from the PCI config space.
+ */
+ vendor_id = PciVendorId(pdev);
+ device_id = PciDeviceId(pdev);
+ irq = PciIrqLine(pdev);
+
+ i = pci_get_base_address(pdev, 0, &io_port);
+ io_port = pci_get_base_cookie(pdev, 0);
+
+ base_c = pci_get_base_cookie(pdev, i);
+ i = pci_get_base_address(pdev, i, &base);
+
+ base_2_c = pci_get_base_cookie(pdev, i);
+ (void) pci_get_base_address(pdev, i, &base_2);
+
+ io_port &= PCI_BASE_ADDRESS_IO_MASK;
+ base &= PCI_BASE_ADDRESS_MEM_MASK;
+ base_2 &= PCI_BASE_ADDRESS_MEM_MASK;
+
+ pci_read_config_byte(pdev, PCI_CLASS_REVISION, &revision);
+
+ /*
+ * If user excluded this chip, donnot initialize it.
+ */
+ if (io_port) {
+ for (i = 0 ; i < 8 ; i++) {
+ if (sym_driver_setup.excludes[i] == io_port)
+ return -1;
+ }
+ }
+
+ /*
+ * Leave here if another driver attached the chip.
+ */
+ if (io_port && check_region (io_port, 128)) {
+ printf_info("%s: IO region 0x%lx[0..127] is in use\n",
+ sym_name(device), (long) io_port);
+ return -1;
+ }
+
+ /*
+ * Check if the chip is supported.
+ */
+ chip = sym_lookup_pci_chip_table(device_id, revision);
+ if (!chip) {
+ printf_info("%s: device not supported\n", sym_name(device));
+ return -1;
+ }
+
+ /*
+ * Check if the chip has been assigned resources we need.
+ */
+#ifdef SYM_CONF_IOMAPPED
+ if (!io_port) {
+ printf_info("%s: IO base address disabled.\n",
+ sym_name(device));
+ return -1;
+ }
+#else
+ if (!base) {
+ printf_info("%s: MMIO base address disabled.\n",
+ sym_name(device));
+ return -1;
+ }
+#endif
+
+ /*
+ * Ignore Symbios chips controlled by various RAID controllers.
+ * These controllers set value 0x52414944 at RAM end - 16.
+ */
+#if defined(__i386__) && !defined(SYM_OPT_NO_BUS_MEMORY_MAPPING)
+ if (base_2_c) {
+ unsigned int ram_size, ram_val;
+ u_long ram_ptr;
+
+ if (chip->features & FE_RAM8K)
+ ram_size = 8192;
+ else
+ ram_size = 4096;
+
+ ram_ptr = pci_map_mem(base_2_c, ram_size);
+ if (ram_ptr) {
+ ram_val = readl_raw(ram_ptr + ram_size - 16);
+ pci_unmap_mem(ram_ptr, ram_size);
+ if (ram_val == 0x52414944) {
+ printf_info("%s: not initializing, "
+ "driven by RAID controller.\n",
+ sym_name(device));
+ return -1;
+ }
+ }
+ }
+#endif /* i386 and PCI MEMORY accessible */
+
+ /*
+ * Copy the chip description to our device structure,
+ * so we can make it match the actual device and options.
+ */
+ bcopy(chip, &device->chip, sizeof(device->chip));
+ device->chip.revision_id = revision;
+
+ /*
+ * Read additionnal info from the configuration space.
+ */
+ pci_read_config_word(pdev, PCI_COMMAND, &command);
+ pci_read_config_byte(pdev, PCI_CACHE_LINE_SIZE, &cache_line_size);
+
+ /*
+ * Enable missing capabilities in the PCI COMMAND register.
+ */
+#ifdef SYM_CONF_IOMAPPED
+#define PCI_COMMAND_BITS_TO_ENABLE (PCI_COMMAND_IO | \
+ PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_PARITY)
+#else
+#define PCI_COMMAND_BITS_TO_ENABLE \
+ (PCI_COMMAND_MEMORY | PCI_COMMAND_MASTER | PCI_COMMAND_PARITY)
+#endif
+ if ((command & PCI_COMMAND_BITS_TO_ENABLE)
+ != PCI_COMMAND_BITS_TO_ENABLE) {
+ printf_info("%s: setting%s%s%s%s...\n", sym_name(device),
+ (command & PCI_COMMAND_IO) ? "" : " PCI_COMMAND_IO",
+ (command & PCI_COMMAND_MEMORY) ? "" : " PCI_COMMAND_MEMORY",
+ (command & PCI_COMMAND_MASTER) ? "" : " PCI_COMMAND_MASTER",
+ (command & PCI_COMMAND_PARITY) ? "" : " PCI_COMMAND_PARITY");
+ command |= PCI_COMMAND_BITS_TO_ENABLE;
+ pci_write_config_word(pdev, PCI_COMMAND, command);
+ }
+#undef PCI_COMMAND_BITS_TO_ENABLE
+
+ /*
+ * If cache line size is not configured, suggest
+ * a value for well known CPUs.
+ */
+#if defined(__i386__) && !defined(MODULE)
+ if (!cache_line_size && boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) {
+ switch(boot_cpu_data.x86) {
+ case 4: suggested_cache_line_size = 4; break;
+ case 6: if (boot_cpu_data.x86_model > 8) break;
+ case 5: suggested_cache_line_size = 8; break;
+ }
+ }
+#endif /* __i386__ */
+
+ /*
+ * Some features are required to be enabled in order to
+ * work around some chip problems. :) ;)
+ * (ITEM 12 of a DEL about the 896 I haven't yet).
+ * We must ensure the chip will use WRITE AND INVALIDATE.
+ * The revision number limit is for now arbitrary.
+ */
+ if (device_id == PCI_DEVICE_ID_NCR_53C896 && revision < 0x4) {
+ chip->features |= (FE_WRIE | FE_CLSE);
+ pci_fix_up |= 3; /* Force appropriate PCI fix-up */
+ }
+
+#ifdef SYM_CONF_PCI_FIX_UP
+ /*
+ * Try to fix up PCI config according to wished features.
+ */
+ if ((pci_fix_up & 1) && (chip->features & FE_CLSE) &&
+ !cache_line_size && suggested_cache_line_size) {
+ cache_line_size = suggested_cache_line_size;
+ pci_write_config_byte(pdev,
+ PCI_CACHE_LINE_SIZE, cache_line_size);
+ printf_info("%s: PCI_CACHE_LINE_SIZE set to %d.\n",
+ sym_name(device), cache_line_size);
+ }
+
+ if ((pci_fix_up & 2) && cache_line_size &&
+ (chip->features & FE_WRIE) && !(command & PCI_COMMAND_INVALIDATE)) {
+ printf_info("%s: setting PCI_COMMAND_INVALIDATE.\n",
+ sym_name(device));
+ command |= PCI_COMMAND_INVALIDATE;
+ pci_write_config_word(pdev, PCI_COMMAND, command);
+ }
+#endif /* SYM_CONF_PCI_FIX_UP */
+
+ /*
+ * Work around for errant bit in 895A. The 66Mhz
+ * capable bit is set erroneously. Clear this bit.
+ * (Item 1 DEL 533)
+ *
+ * Make sure Config space and Features agree.
+ *
+ * Recall: writes are not normal to status register -
+ * write a 1 to clear and a 0 to leave unchanged.
+ * Can only reset bits.
+ */
+ pci_read_config_word(pdev, PCI_STATUS, &status_reg);
+ if (chip->features & FE_66MHZ) {
+ if (!(status_reg & PCI_STATUS_66MHZ))
+ chip->features &= ~FE_66MHZ;
+ }
+ else {
+ if (status_reg & PCI_STATUS_66MHZ) {
+ status_reg = PCI_STATUS_66MHZ;
+ pci_write_config_word(pdev, PCI_STATUS, status_reg);
+ pci_read_config_word(pdev, PCI_STATUS, &status_reg);
+ }
+ }
+
+ /*
+ * Initialise device structure with items required by sym_attach.
+ */
+ device->pdev = pdev;
+ device->s.bus = PciBusNumber(pdev);
+ device->s.device_fn = PciDeviceFn(pdev);
+ device->s.base = base;
+ device->s.base_2 = base_2;
+ device->s.base_c = base_c;
+ device->s.base_2_c = base_2_c;
+ device->s.io_port = io_port;
+ device->s.irq = irq;
+ device->attach_done = 0;
+
+ return 0;
+}
+
+/*
+ * List of supported NCR chip ids
+ */
+static u_short sym_chip_ids[] __initdata = {
+ PCI_ID_SYM53C810,
+ PCI_ID_SYM53C815,
+ PCI_ID_SYM53C825,
+ PCI_ID_SYM53C860,
+ PCI_ID_SYM53C875,
+ PCI_ID_SYM53C875_2,
+ PCI_ID_SYM53C885,
+ PCI_ID_SYM53C875A,
+ PCI_ID_SYM53C895,
+ PCI_ID_SYM53C896,
+ PCI_ID_SYM53C895A,
+ PCI_ID_LSI53C1510D,
+ PCI_ID_LSI53C1010,
+ PCI_ID_LSI53C1010_2
+};
+
+/*
+ * Detect all 53c8xx hosts and then attach them.
+ *
+ * If we are using NVRAM, once all hosts are detected, we need to
+ * check any NVRAM for boot order in case detect and boot order
+ * differ and attach them using the order in the NVRAM.
+ *
+ * If no NVRAM is found or data appears invalid attach boards in
+ * the the order they are detected.
+ */
+int __init sym53c8xx_detect(Scsi_Host_Template *tpnt)
+{
+ pcidev_t pcidev;
+ int i, j, chips, hosts, count;
+ int attach_count = 0;
+ sym_device *devtbl, *devp;
+ sym_nvram nvram;
+#if SYM_CONF_NVRAM_SUPPORT
+ sym_nvram nvram0, *nvp;
+#endif
+
+ /*
+ * PCI is required.
+ */
+ if (!pci_present())
+ return 0;
+
+ /*
+ * Initialize driver general stuff.
+ */
+#ifdef SYM_LINUX_PROC_INFO_SUPPORT
+#if LINUX_VERSION_CODE < LinuxVersionCode(2,3,27)
+ tpnt->proc_dir = &proc_scsi_sym53c8xx;
+#else
+ tpnt->proc_name = NAME53C8XX;
+#endif
+ tpnt->proc_info = sym53c8xx_proc_info;
+#endif
+
+#ifdef SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT
+#ifdef MODULE
+if (sym53c8xx)
+ sym53c8xx_setup(sym53c8xx);
+#endif
+#ifdef SYM_LINUX_DEBUG_CONTROL_SUPPORT
+ sym_debug_flags = sym_driver_setup.debug;
+#endif
+ if (boot_verbose >= 2)
+ sym53c8xx_print_driver_setup();
+#endif /* SYM_LINUX_BOOT_COMMAND_LINE_SUPPORT */
+
+ /*
+ * Allocate the device table since we donnot want to
+ * overflow the kernel stack.
+ * 1 x 4K PAGE is enough for more than 40 devices for i386.
+ */
+ devtbl = sym_calloc(PAGE_SIZE, "DEVTBL");
+ if (!devtbl)
+ return 0;
+
+ /*
+ * Detect all NCR PQS/PDS memory controllers.
+ */
+#ifdef SYM_CONF_PQS_PDS_SUPPORT
+ sym_detect_pqs_pds();
+#endif
+
+ /*
+ * Detect all 53c8xx hosts.
+ * Save the first Symbios NVRAM content if any
+ * for the boot order.
+ */
+ chips = sizeof(sym_chip_ids) / sizeof(sym_chip_ids[0]);
+ hosts = PAGE_SIZE / sizeof(*devtbl);
+#if SYM_CONF_NVRAM_SUPPORT
+ nvp = (sym_driver_setup.use_nvram & 0x1) ? &nvram0 : 0;
+#endif
+ j = 0;
+ count = 0;
+ pcidev = PCIDEV_NULL;
+ while (1) {
+ char *msg = "";
+ if (count >= hosts)
+ break;
+ if (j >= chips)
+ break;
+ i = sym_driver_setup.reverse_probe ? chips - 1 - j : j;
+ pcidev = pci_find_device(PCI_VENDOR_ID_NCR, sym_chip_ids[i],
+ pcidev);
+ if (pcidev == PCIDEV_NULL) {
+ ++j;
+ continue;
+ }
+ /* This one is guaranteed by AC to do nothing :-) */
+ if (pci_enable_device(pcidev))
+ continue;
+ /* Some HW as the HP LH4 may report twice PCI devices */
+ for (i = 0; i < count ; i++) {
+ if (devtbl[i].s.bus == PciBusNumber(pcidev) &&
+ devtbl[i].s.device_fn == PciDeviceFn(pcidev))
+ break;
+ }
+ if (i != count) /* Ignore this device if we already have it */
+ continue;
+ devp = &devtbl[count];
+ devp->host_id = SYM_SETUP_HOST_ID;
+ devp->attach_done = 0;
+ if (sym53c8xx_pci_init(tpnt, pcidev, devp)) {
+ continue;
+ }
+ ++count;
+#if SYM_CONF_NVRAM_SUPPORT
+ if (nvp) {
+ sym_get_nvram(devp, nvp);
+ switch(nvp->type) {
+ case SYM_SYMBIOS_NVRAM:
+ /*
+ * Switch to the other nvram buffer, so that
+ * nvram0 will contain the first Symbios
+ * format NVRAM content with boot order.
+ */
+ nvp = &nvram;
+ msg = "with Symbios NVRAM";
+ break;
+ case SYM_TEKRAM_NVRAM:
+ msg = "with Tekram NVRAM";
+ break;
+ }
+ }
+#endif
+#ifdef SYM_CONF_PQS_PDS_SUPPORT
+ /*
+ * Match the BUS number for PQS/PDS devices.
+ * Read the SCSI ID from a special register mapped
+ * into the configuration space of the individual
+ * 875s. This register is set up by the PQS bios
+ */
+ for(i = 0; i < SYM_CONF_MAX_PQS_BUS && pqs_bus[i] != -1; i++) {
+ u_char tmp;
+ if (pqs_bus[i] == PciBusNumber(pcidev)) {
+ pci_read_config_byte(pcidev, 0x84, &tmp);
+ devp->pqs_pds = 1;
+ devp->host_id = tmp;
+ break;
+ }
+ }
+ if (devp->pqs_pds)
+ msg = "(NCR PQS/PDS)";
+#endif
+ if (boot_verbose)
+ printf_info("%s: 53c%s detected %s\n",
+ sym_name(devp), devp->chip.name, msg);
+ }
+
+ /*
+ * If we have found a SYMBIOS NVRAM, use first the NVRAM boot
+ * sequence as device boot order.
+ * check devices in the boot record against devices detected.
+ * attach devices if we find a match. boot table records that
+ * do not match any detected devices will be ignored.
+ * devices that do not match any boot table will not be attached
+ * here but will attempt to be attached during the device table
+ * rescan.
+ */
+#if SYM_CONF_NVRAM_SUPPORT
+ if (!nvp || nvram0.type != SYM_SYMBIOS_NVRAM)
+ goto next;
+ for (i = 0; i < 4; i++) {
+ Symbios_host *h = &nvram0.data.Symbios.host[i];
+ for (j = 0 ; j < count ; j++) {
+ devp = &devtbl[j];
+ if (h->device_fn != devp->s.device_fn ||
+ h->bus_nr != devp->s.bus ||
+ h->device_id != devp->chip.device_id)
+ continue;
+ if (devp->attach_done)
+ continue;
+ if (h->flags & SYMBIOS_INIT_SCAN_AT_BOOT) {
+ sym_get_nvram(devp, nvp);
+ if (!sym_attach (tpnt, attach_count, devp))
+ attach_count++;
+ }
+ else if (!(sym_driver_setup.use_nvram & 0x80))
+ printf_info(
+ "%s: 53c%s state OFF thus not attached\n",
+ sym_name(devp), devp->chip.name);
+ else
+ continue;
+
+ devp->attach_done = 1;
+ break;
+ }
+ }
+next:
+#endif
+
+ /*
+ * Rescan device list to make sure all boards attached.
+ * Devices without boot records will not be attached yet
+ * so try to attach them here.
+ */
+ for (i= 0; i < count; i++) {
+ devp = &devtbl[i];
+ if (!devp->attach_done) {
+ devp->nvram = &nvram;
+ nvram.type = 0;
+#if SYM_CONF_NVRAM_SUPPORT
+ sym_get_nvram(devp, nvp);
+#endif
+ if (!sym_attach (tpnt, attach_count, devp))
+ attach_count++;
+ }
+ }
+
+ sym_mfree(devtbl, PAGE_SIZE, "DEVTBL");
+
+ return attach_count;
+}
+
+
+
+#ifdef MODULE
+/*
+ * Linux release module stuff.
+ *
+ * Called before unloading the module.
+ * Detach the host.
+ * We have to free resources and halt the NCR chip.
+ *
+ */
+static int sym_detach(hcb_p np)
+{
+ printk("%s: detaching ...\n", sym_name(np));
+
+ /*
+ * Try to delete the timer.
+ * In the unlikely situation where this failed,
+ * try to synchronize with the timer handler.
+ */
+#if LINUX_VERSION_CODE < LinuxVersionCode(2, 4, 0)
+ np->s.release_stage = 1;
+ if (!del_timer(&np->s.timer)) {
+ int i = 1000;
+ int k = 1;
+ while (1) {
+ u_long flags;
+ SYM_LOCK_HCB(np, flags);
+ k = np->s.release_stage;
+ SYM_UNLOCK_HCB(np, flags);
+ if (k == 2 || !--i)
+ break;
+ MDELAY(5);
+ }
+ if (!i)
+ printk("%s: failed to kill timer!\n", sym_name(np));
+ }
+ np->s.release_stage = 2;
+#else
+ (void)del_timer_sync(&np->s.timer);
+#endif
+
+ /*
+ * Reset NCR chip.
+ * We should use sym_soft_reset(), but we donnot want to do
+ * so, since we may not be safe if interrupts occur.
+ */
+ printk("%s: resetting chip\n", sym_name(np));
+ OUTB (nc_istat, SRST);
+ UDELAY (10);
+ OUTB (nc_istat, 0);
+
+ /*
+ * Free host resources
+ */
+ sym_free_resources(np);
+
+ return 1;
+}
+
+int sym53c8xx_release(struct Scsi_Host *host)
+{
+ sym_detach(((struct host_data *) host->hostdata)->ncb);
+
+ return 0;
+}
+#endif /* MODULE */
+
+/*
+ * For bigots to keep silent. :)
+ */
+#ifdef MODULE_LICENSE
+MODULE_LICENSE("Dual BSD/GPL");
+#endif
+
+/*
+ * Driver host template.
+ */
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,0)
+static
+#endif
+#if LINUX_VERSION_CODE >= LinuxVersionCode(2,4,0) || defined(MODULE)
+Scsi_Host_Template driver_template = SYM53C8XX;
+#include "../scsi_module.c"
+#endif
FUNET's LINUX-ADM group, linux-adm@nic.funet.fi
TCL-scripts by Sam Shen (who was at: slshen@lbl.gov)