linux/drivers/scsi/gvp11.c

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#include <linux/types.h>
#include <linux/mm.h>
include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-24 08:04:11 +00:00
#include <linux/slab.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/amigaints.h>
#include <asm/amigahw.h>
#include <linux/zorro.h>
#include <asm/irq.h>
#include <linux/spinlock.h>
#include "scsi.h"
#include <scsi/scsi_host.h>
#include "wd33c93.h"
#include "gvp11.h"
#include <linux/stat.h>
#define DMA(ptr) ((gvp11_scsiregs *)((ptr)->base))
static irqreturn_t gvp11_intr(int irq, void *_instance)
{
unsigned long flags;
unsigned int status;
struct Scsi_Host *instance = (struct Scsi_Host *)_instance;
status = DMA(instance)->CNTR;
if (!(status & GVP11_DMAC_INT_PENDING))
return IRQ_NONE;
spin_lock_irqsave(instance->host_lock, flags);
wd33c93_intr(instance);
spin_unlock_irqrestore(instance->host_lock, flags);
return IRQ_HANDLED;
}
static int gvp11_xfer_mask = 0;
void gvp11_setup(char *str, int *ints)
{
gvp11_xfer_mask = ints[1];
}
static int dma_setup(struct scsi_cmnd *cmd, int dir_in)
{
struct Scsi_Host *instance = cmd->device->host;
struct WD33C93_hostdata *hdata = shost_priv(instance);
unsigned short cntr = GVP11_DMAC_INT_ENABLE;
unsigned long addr = virt_to_bus(cmd->SCp.ptr);
int bank_mask;
static int scsi_alloc_out_of_range = 0;
/* use bounce buffer if the physical address is bad */
if (addr & hdata->dma_xfer_mask) {
hdata->dma_bounce_len = (cmd->SCp.this_residual + 511) & ~0x1ff;
if (!scsi_alloc_out_of_range) {
hdata->dma_bounce_buffer =
kmalloc(hdata->dma_bounce_len, GFP_KERNEL);
hdata->dma_buffer_pool = BUF_SCSI_ALLOCED;
}
if (scsi_alloc_out_of_range ||
!hdata->dma_bounce_buffer) {
hdata->dma_bounce_buffer =
amiga_chip_alloc(hdata->dma_bounce_len,
"GVP II SCSI Bounce Buffer");
if (!hdata->dma_bounce_buffer) {
hdata->dma_bounce_len = 0;
return 1;
}
hdata->dma_buffer_pool = BUF_CHIP_ALLOCED;
}
/* check if the address of the bounce buffer is OK */
addr = virt_to_bus(hdata->dma_bounce_buffer);
if (addr & hdata->dma_xfer_mask) {
/* fall back to Chip RAM if address out of range */
if (hdata->dma_buffer_pool == BUF_SCSI_ALLOCED) {
kfree(hdata->dma_bounce_buffer);
scsi_alloc_out_of_range = 1;
} else {
amiga_chip_free(hdata->dma_bounce_buffer);
}
hdata->dma_bounce_buffer =
amiga_chip_alloc(hdata->dma_bounce_len,
"GVP II SCSI Bounce Buffer");
if (!hdata->dma_bounce_buffer) {
hdata->dma_bounce_len = 0;
return 1;
}
addr = virt_to_bus(hdata->dma_bounce_buffer);
hdata->dma_buffer_pool = BUF_CHIP_ALLOCED;
}
if (!dir_in) {
/* copy to bounce buffer for a write */
memcpy(hdata->dma_bounce_buffer, cmd->SCp.ptr,
cmd->SCp.this_residual);
}
}
/* setup dma direction */
if (!dir_in)
cntr |= GVP11_DMAC_DIR_WRITE;
hdata->dma_dir = dir_in;
DMA(cmd->device->host)->CNTR = cntr;
/* setup DMA *physical* address */
DMA(cmd->device->host)->ACR = addr;
if (dir_in) {
/* invalidate any cache */
cache_clear(addr, cmd->SCp.this_residual);
} else {
/* push any dirty cache */
cache_push(addr, cmd->SCp.this_residual);
}
bank_mask = (~hdata->dma_xfer_mask >> 18) & 0x01c0;
if (bank_mask)
DMA(cmd->device->host)->BANK = bank_mask & (addr >> 18);
/* start DMA */
DMA(cmd->device->host)->ST_DMA = 1;
/* return success */
return 0;
}
static void dma_stop(struct Scsi_Host *instance, struct scsi_cmnd *SCpnt,
int status)
{
struct WD33C93_hostdata *hdata = shost_priv(instance);
/* stop DMA */
DMA(instance)->SP_DMA = 1;
/* remove write bit from CONTROL bits */
DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
/* copy from a bounce buffer, if necessary */
if (status && hdata->dma_bounce_buffer) {
if (hdata->dma_dir && SCpnt)
memcpy(SCpnt->SCp.ptr, hdata->dma_bounce_buffer,
SCpnt->SCp.this_residual);
if (hdata->dma_buffer_pool == BUF_SCSI_ALLOCED)
kfree(hdata->dma_bounce_buffer);
else
amiga_chip_free(hdata->dma_bounce_buffer);
hdata->dma_bounce_buffer = NULL;
hdata->dma_bounce_len = 0;
}
}
#define CHECK_WD33C93
int __init gvp11_detect(struct scsi_host_template *tpnt)
{
static unsigned char called = 0;
struct Scsi_Host *instance;
unsigned long address;
unsigned int epc;
struct zorro_dev *z = NULL;
unsigned int default_dma_xfer_mask;
struct WD33C93_hostdata *hdata;
wd33c93_regs regs;
int num_gvp11 = 0;
#ifdef CHECK_WD33C93
volatile unsigned char *sasr_3393, *scmd_3393;
unsigned char save_sasr;
unsigned char q, qq;
#endif
if (!MACH_IS_AMIGA || called)
return 0;
called = 1;
tpnt->proc_name = "GVP11";
tpnt->proc_info = &wd33c93_proc_info;
while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
/*
* This should (hopefully) be the correct way to identify
* all the different GVP SCSI controllers (except for the
* SERIES I though).
*/
if (z->id == ZORRO_PROD_GVP_COMBO_030_R3_SCSI ||
z->id == ZORRO_PROD_GVP_SERIES_II)
default_dma_xfer_mask = ~0x00ffffff;
else if (z->id == ZORRO_PROD_GVP_GFORCE_030_SCSI ||
z->id == ZORRO_PROD_GVP_A530_SCSI ||
z->id == ZORRO_PROD_GVP_COMBO_030_R4_SCSI)
default_dma_xfer_mask = ~0x01ffffff;
else if (z->id == ZORRO_PROD_GVP_A1291 ||
z->id == ZORRO_PROD_GVP_GFORCE_040_SCSI_1)
default_dma_xfer_mask = ~0x07ffffff;
else
continue;
/*
* Rumors state that some GVP ram boards use the same product
* code as the SCSI controllers. Therefore if the board-size
* is not 64KB we asume it is a ram board and bail out.
*/
if (z->resource.end - z->resource.start != 0xffff)
continue;
address = z->resource.start;
if (!request_mem_region(address, 256, "wd33c93"))
continue;
#ifdef CHECK_WD33C93
/*
* These darn GVP boards are a problem - it can be tough to tell
* whether or not they include a SCSI controller. This is the
* ultimate Yet-Another-GVP-Detection-Hack in that it actually
* probes for a WD33c93 chip: If we find one, it's extremely
* likely that this card supports SCSI, regardless of Product_
* Code, Board_Size, etc.
*/
/* Get pointers to the presumed register locations and save contents */
sasr_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SASR);
scmd_3393 = &(((gvp11_scsiregs *)(ZTWO_VADDR(address)))->SCMD);
save_sasr = *sasr_3393;
/* First test the AuxStatus Reg */
q = *sasr_3393; /* read it */
if (q & 0x08) /* bit 3 should always be clear */
goto release;
*sasr_3393 = WD_AUXILIARY_STATUS; /* setup indirect address */
if (*sasr_3393 == WD_AUXILIARY_STATUS) { /* shouldn't retain the write */
*sasr_3393 = save_sasr; /* Oops - restore this byte */
goto release;
}
if (*sasr_3393 != q) { /* should still read the same */
*sasr_3393 = save_sasr; /* Oops - restore this byte */
goto release;
}
if (*scmd_3393 != q) /* and so should the image at 0x1f */
goto release;
/*
* Ok, we probably have a wd33c93, but let's check a few other places
* for good measure. Make sure that this works for both 'A and 'B
* chip versions.
*/
*sasr_3393 = WD_SCSI_STATUS;
q = *scmd_3393;
*sasr_3393 = WD_SCSI_STATUS;
*scmd_3393 = ~q;
*sasr_3393 = WD_SCSI_STATUS;
qq = *scmd_3393;
*sasr_3393 = WD_SCSI_STATUS;
*scmd_3393 = q;
if (qq != q) /* should be read only */
goto release;
*sasr_3393 = 0x1e; /* this register is unimplemented */
q = *scmd_3393;
*sasr_3393 = 0x1e;
*scmd_3393 = ~q;
*sasr_3393 = 0x1e;
qq = *scmd_3393;
*sasr_3393 = 0x1e;
*scmd_3393 = q;
if (qq != q || qq != 0xff) /* should be read only, all 1's */
goto release;
*sasr_3393 = WD_TIMEOUT_PERIOD;
q = *scmd_3393;
*sasr_3393 = WD_TIMEOUT_PERIOD;
*scmd_3393 = ~q;
*sasr_3393 = WD_TIMEOUT_PERIOD;
qq = *scmd_3393;
*sasr_3393 = WD_TIMEOUT_PERIOD;
*scmd_3393 = q;
if (qq != (~q & 0xff)) /* should be read/write */
goto release;
#endif
instance = scsi_register(tpnt, sizeof(struct WD33C93_hostdata));
if (instance == NULL)
goto release;
instance->base = ZTWO_VADDR(address);
instance->irq = IRQ_AMIGA_PORTS;
instance->unique_id = z->slotaddr;
hdata = shost_priv(instance);
if (gvp11_xfer_mask)
hdata->dma_xfer_mask = gvp11_xfer_mask;
else
hdata->dma_xfer_mask = default_dma_xfer_mask;
DMA(instance)->secret2 = 1;
DMA(instance)->secret1 = 0;
DMA(instance)->secret3 = 15;
while (DMA(instance)->CNTR & GVP11_DMAC_BUSY)
;
DMA(instance)->CNTR = 0;
DMA(instance)->BANK = 0;
epc = *(unsigned short *)(ZTWO_VADDR(address) + 0x8000);
/*
* Check for 14MHz SCSI clock
*/
regs.SASR = &(DMA(instance)->SASR);
regs.SCMD = &(DMA(instance)->SCMD);
hdata->no_sync = 0xff;
hdata->fast = 0;
hdata->dma_mode = CTRL_DMA;
wd33c93_init(instance, regs, dma_setup, dma_stop,
(epc & GVP_SCSICLKMASK) ? WD33C93_FS_8_10
: WD33C93_FS_12_15);
if (request_irq(IRQ_AMIGA_PORTS, gvp11_intr, IRQF_SHARED,
"GVP11 SCSI", instance))
goto unregister;
DMA(instance)->CNTR = GVP11_DMAC_INT_ENABLE;
num_gvp11++;
continue;
unregister:
scsi_unregister(instance);
release:
release_mem_region(address, 256);
}
return num_gvp11;
}
static int gvp11_bus_reset(struct scsi_cmnd *cmd)
{
/* FIXME perform bus-specific reset */
/* FIXME 2: shouldn't we no-op this function (return
FAILED), and fall back to host reset function,
wd33c93_host_reset ? */
spin_lock_irq(cmd->device->host->host_lock);
wd33c93_host_reset(cmd);
spin_unlock_irq(cmd->device->host->host_lock);
return SUCCESS;
}
#define HOSTS_C
#include "gvp11.h"
static struct scsi_host_template driver_template = {
.proc_name = "GVP11",
.name = "GVP Series II SCSI",
.detect = gvp11_detect,
.release = gvp11_release,
.queuecommand = wd33c93_queuecommand,
.eh_abort_handler = wd33c93_abort,
.eh_bus_reset_handler = gvp11_bus_reset,
.eh_host_reset_handler = wd33c93_host_reset,
.can_queue = CAN_QUEUE,
.this_id = 7,
.sg_tablesize = SG_ALL,
.cmd_per_lun = CMD_PER_LUN,
.use_clustering = DISABLE_CLUSTERING
};
#include "scsi_module.c"
int gvp11_release(struct Scsi_Host *instance)
{
#ifdef MODULE
DMA(instance)->CNTR = 0;
release_mem_region(ZTWO_PADDR(instance->base), 256);
free_irq(IRQ_AMIGA_PORTS, instance);
#endif
return 1;
}
MODULE_LICENSE("GPL");