From 99c9e0a1d6cfe1ba1169a7a81435ee85bc00e4a1 Mon Sep 17 00:00:00 2001 From: Matthew Wilcox Date: Fri, 5 Oct 2007 15:55:12 -0400 Subject: [PATCH] [SCSI] sym53c8xx: Make interrupt handler capable of returning IRQ_NONE Make sym_interrupt return an irqreturn_t instead of void, and take a Scsi_Host instead of a sym_hcb. Pass the Scsi_Host to the interrupt handler instead of the sym_hcb. Rename the host_data to sym_data. Keep a pci_dev pointer in the sym_data. Rename the Scsi_Host from instance to shost. Signed-off-by: Matthew Wilcox Signed-off-by: James Bottomley --- drivers/scsi/sym53c8xx_2/sym_glue.c | 107 ++++++++++++++-------------- drivers/scsi/sym53c8xx_2/sym_glue.h | 6 +- drivers/scsi/sym53c8xx_2/sym_hipd.c | 16 +++-- drivers/scsi/sym53c8xx_2/sym_hipd.h | 2 +- 4 files changed, 66 insertions(+), 65 deletions(-) diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c index 9521f0ea4129..1c18b3b9aa15 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -39,7 +39,6 @@ */ #include #include -#include #include #include #include @@ -549,21 +548,23 @@ static int sym53c8xx_queue_command(struct scsi_cmnd *cmd, */ static irqreturn_t sym53c8xx_intr(int irq, void *dev_id) { - struct sym_hcb *np = dev_id; + struct Scsi_Host *shost = dev_id; + struct sym_data *sym_data = shost_priv(shost); + irqreturn_t result; /* Avoid spinloop trying to handle interrupts on frozen device */ - if (pci_channel_offline(np->s.device)) + if (pci_channel_offline(sym_data->pdev)) return IRQ_NONE; if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("["); - spin_lock(np->s.host->host_lock); - sym_interrupt(np); - spin_unlock(np->s.host->host_lock); + spin_lock(shost->host_lock); + result = sym_interrupt(shost); + spin_unlock(shost->host_lock); if (DEBUG_FLAGS & DEBUG_TINY) printf_debug ("]\n"); - return IRQ_HANDLED; + return result; } /* @@ -613,22 +614,19 @@ static int sym_eh_handler(int op, char *opname, struct scsi_cmnd *cmd) */ #define WAIT_FOR_PCI_RECOVERY 35 if (pci_channel_offline(pdev)) { - struct host_data *hostdata = shost_priv(host); + struct sym_data *sym_data = shost_priv(host); struct completion *io_reset; int finished_reset = 0; init_completion(&eh_done); spin_lock_irq(host->host_lock); /* Make sure we didn't race */ if (pci_channel_offline(pdev)) { - if (!hostdata->io_reset) - hostdata->io_reset = &eh_done; - io_reset = hostdata->io_reset; + if (!sym_data->io_reset) + sym_data->io_reset = &eh_done; + io_reset = sym_data->io_reset; } else { - io_reset = NULL; - } - - if (!pci_channel_offline(pdev)) finished_reset = 1; + } spin_unlock_irq(host->host_lock); if (!finished_reset) finished_reset = wait_for_completion_timeout(io_reset, @@ -1273,9 +1271,9 @@ static void sym_free_resources(struct sym_hcb *np, struct pci_dev *pdev) static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt, int unit, struct sym_device *dev) { - struct host_data *host_data; + struct sym_data *sym_data; struct sym_hcb *np = NULL; - struct Scsi_Host *instance = NULL; + struct Scsi_Host *shost; struct pci_dev *pdev = dev->pdev; unsigned long flags; struct sym_fw *fw; @@ -1289,15 +1287,12 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt, */ fw = sym_find_firmware(&dev->chip); if (!fw) - goto attach_failed; + return NULL; - /* - * Allocate host_data structure - */ - instance = scsi_host_alloc(tpnt, sizeof(*host_data)); - if (!instance) - goto attach_failed; - host_data = (struct host_data *) instance->hostdata; + shost = scsi_host_alloc(tpnt, sizeof(*sym_data)); + if (!shost) + return NULL; + sym_data = shost_priv(shost); /* * Allocate immediately the host control block, @@ -1310,8 +1305,9 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt, goto attach_failed; np->s.device = pdev; np->bus_dmat = &pdev->dev; /* Result in 1 DMA pool per HBA */ - host_data->ncb = np; - np->s.host = instance; + sym_data->ncb = np; + sym_data->pdev = pdev; + np->s.host = shost; pci_set_drvdata(pdev, np); @@ -1358,7 +1354,7 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt, if (dev->ram_base) np->ram_ba = (u32)dev->ram_base; - if (sym_hcb_attach(instance, fw, dev->nvram)) + if (sym_hcb_attach(shost, fw, dev->nvram)) goto attach_failed; /* @@ -1366,7 +1362,8 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt, * If we synchonize the C code with SCRIPTS on interrupt, * we do not want to share the INTR line at all. */ - if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX, np)) { + if (request_irq(pdev->irq, sym53c8xx_intr, IRQF_SHARED, NAME53C8XX, + shost)) { printf_err("%s: request irq %u failure\n", sym_name(np), pdev->irq); goto attach_failed; @@ -1376,7 +1373,7 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt, * After SCSI devices have been opened, we cannot * reset the bus safely, so we do it here. */ - spin_lock_irqsave(instance->host_lock, flags); + spin_lock_irqsave(shost->host_lock, flags); if (sym_reset_scsi_bus(np, 0)) goto reset_failed; @@ -1398,37 +1395,37 @@ static struct Scsi_Host * __devinit sym_attach(struct scsi_host_template *tpnt, * 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; - instance->unique_id = pci_resource_start(pdev, 0); - instance->cmd_per_lun = SYM_CONF_MAX_TAG; - instance->can_queue = (SYM_CONF_MAX_START-2); - instance->sg_tablesize = SYM_CONF_MAX_SG; - instance->max_cmd_len = 16; + shost->max_channel = 0; + shost->this_id = np->myaddr; + shost->max_id = np->maxwide ? 16 : 8; + shost->max_lun = SYM_CONF_MAX_LUN; + shost->unique_id = pci_resource_start(pdev, 0); + shost->cmd_per_lun = SYM_CONF_MAX_TAG; + shost->can_queue = (SYM_CONF_MAX_START-2); + shost->sg_tablesize = SYM_CONF_MAX_SG; + shost->max_cmd_len = 16; BUG_ON(sym2_transport_template == NULL); - instance->transportt = sym2_transport_template; + shost->transportt = sym2_transport_template; /* 53c896 rev 1 errata: DMA may not cross 16MB boundary */ if (pdev->device == PCI_DEVICE_ID_NCR_53C896 && pdev->revision < 2) - instance->dma_boundary = 0xFFFFFF; + shost->dma_boundary = 0xFFFFFF; - spin_unlock_irqrestore(instance->host_lock, flags); + spin_unlock_irqrestore(shost->host_lock, flags); - return instance; + return shost; reset_failed: printf_err("%s: FATAL ERROR: CHECK SCSI BUS - CABLES, " "TERMINATION, DEVICE POWER etc.!\n", sym_name(np)); - spin_unlock_irqrestore(instance->host_lock, flags); + spin_unlock_irqrestore(shost->host_lock, flags); attach_failed: - if (!instance) + if (!shost) return NULL; printf_info("%s: giving up ...\n", sym_name(np)); if (np) sym_free_resources(np, pdev); - scsi_host_put(instance); + scsi_host_put(shost); return NULL; } @@ -1702,7 +1699,7 @@ static int __devinit sym2_probe(struct pci_dev *pdev, { struct sym_device sym_dev; struct sym_nvram nvram; - struct Scsi_Host *instance; + struct Scsi_Host *shost; memset(&sym_dev, 0, sizeof(sym_dev)); memset(&nvram, 0, sizeof(nvram)); @@ -1729,13 +1726,13 @@ static int __devinit sym2_probe(struct pci_dev *pdev, sym_get_nvram(&sym_dev, &nvram); - instance = sym_attach(&sym2_template, attach_count, &sym_dev); - if (!instance) + shost = sym_attach(&sym2_template, attach_count, &sym_dev); + if (!shost) goto free; - if (scsi_add_host(instance, &pdev->dev)) + if (scsi_add_host(shost, &pdev->dev)) goto detach; - scsi_scan_host(instance); + scsi_scan_host(shost); attach_count++; @@ -1884,12 +1881,12 @@ static void sym2_io_resume(struct pci_dev *pdev) { struct sym_hcb *np = pci_get_drvdata(pdev); struct Scsi_Host *shost = np->s.host; - struct host_data *hostdata = shost_priv(shost); + struct sym_data *sym_data = shost_priv(shost); spin_lock_irq(shost->host_lock); - if (hostdata->io_reset) - complete_all(hostdata->io_reset); - hostdata->io_reset = NULL; + if (sym_data->io_reset) + complete_all(sym_data->io_reset); + sym_data->io_reset = NULL; spin_unlock_irq(shost->host_lock); } diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.h b/drivers/scsi/sym53c8xx_2/sym_glue.h index ab2de1ca9438..98261a5af87d 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.h +++ b/drivers/scsi/sym53c8xx_2/sym_glue.h @@ -42,6 +42,7 @@ #include #include +#include #include #include #include @@ -217,14 +218,15 @@ struct sym_device { /* * Driver host data structure. */ -struct host_data { +struct sym_data { struct sym_hcb *ncb; struct completion *io_reset; /* PCI error handling */ + struct pci_dev *pdev; }; static inline struct sym_hcb * sym_get_hcb(struct Scsi_Host *host) { - return ((struct host_data *)host->hostdata)->ncb; + return ((struct sym_data *)host->hostdata)->ncb; } #include "sym_fw.h" diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.c b/drivers/scsi/sym53c8xx_2/sym_hipd.c index 13fd5b2c56fc..5d2079f9e596 100644 --- a/drivers/scsi/sym53c8xx_2/sym_hipd.c +++ b/drivers/scsi/sym53c8xx_2/sym_hipd.c @@ -2760,8 +2760,9 @@ reset_all: * Use at your own decision and risk. */ -void sym_interrupt (struct sym_hcb *np) +irqreturn_t sym_interrupt(struct Scsi_Host *shost) { + struct sym_hcb *np = sym_get_hcb(shost); u_char istat, istatc; u_char dstat; u_short sist; @@ -2786,7 +2787,7 @@ void sym_interrupt (struct sym_hcb *np) } if (!(istat & (SIP|DIP))) - return; + return (istat & INTF) ? IRQ_HANDLED : IRQ_NONE; #if 0 /* We should never get this one */ if (istat & CABRT) @@ -2818,7 +2819,7 @@ void sym_interrupt (struct sym_hcb *np) * never clear. */ if (unlikely(sist == 0xffff && dstat == 0xff)) { if (pci_channel_offline(np->s.device)) - return; + return IRQ_NONE; } } while (istatc & (SIP|DIP)); @@ -2856,7 +2857,7 @@ void sym_interrupt (struct sym_hcb *np) else if (dstat & SIR) sym_int_sir(np); else if (dstat & SSI) OUTONB_STD(); else goto unknown_int; - return; + return IRQ_HANDLED; } /* @@ -2873,7 +2874,7 @@ void sym_interrupt (struct sym_hcb *np) if (sist & RST) { printf("%s: SCSI BUS reset detected.\n", sym_name(np)); sym_start_up (np, 1); - return; + return IRQ_HANDLED; } OUTB(np, nc_ctest3, np->rv_ctest3 | CLF); /* clear dma fifo */ @@ -2885,7 +2886,7 @@ void sym_interrupt (struct sym_hcb *np) else if (sist & STO) sym_int_sto (np); else if (sist & UDC) sym_int_udc (np); else goto unknown_int; - return; + return IRQ_HANDLED; } /* @@ -2900,7 +2901,7 @@ void sym_interrupt (struct sym_hcb *np) if ((sist & (GEN|HTH|SGE)) || (dstat & (MDPE|BF|ABRT|IID))) { sym_start_reset(np); - return; + return IRQ_HANDLED; } unknown_int: @@ -2911,6 +2912,7 @@ unknown_int: printf( "%s: unknown interrupt(s) ignored, " "ISTAT=0x%x DSTAT=0x%x SIST=0x%x\n", sym_name(np), istat, dstat, sist); + return IRQ_NONE; } /* diff --git a/drivers/scsi/sym53c8xx_2/sym_hipd.h b/drivers/scsi/sym53c8xx_2/sym_hipd.h index 4354571a63ef..a9c08668b98c 100644 --- a/drivers/scsi/sym53c8xx_2/sym_hipd.h +++ b/drivers/scsi/sym53c8xx_2/sym_hipd.h @@ -1056,7 +1056,7 @@ void sym_start_next_ccbs(struct sym_hcb *np, struct sym_lcb *lp, int maxn); void sym_put_start_queue(struct sym_hcb *np, struct sym_ccb *cp); #endif void sym_start_up(struct sym_hcb *np, int reason); -void sym_interrupt(struct sym_hcb *np); +irqreturn_t sym_interrupt(struct Scsi_Host *); int sym_clear_tasks(struct sym_hcb *np, int cam_status, int target, int lun, int task); struct sym_ccb *sym_get_ccb(struct sym_hcb *np, struct scsi_cmnd *cmd, u_char tag_order); void sym_free_ccb(struct sym_hcb *np, struct sym_ccb *cp); -- 2.20.1