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[PARISC] Update ccio-dma from parisc tree
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revert use of %%sr0 in fdc asm.

Thanks to Joel Soete for pointing out this oversight.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

2.6.14-rc2-pa3 fdc/lci should be %r0 instead 0 for index (PA 1.1 compliance)
From: Joel Soete <soete.joel@tiscali.be>
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

Explain why we need insert_resource() instead of request_resource().

Fundementally, this is more convoluted for ccio driver because of
o legacy (HP-PB) transperant bridges.
o support for MMIO behind card-mode Dino (PCI)
o support for above bridges without ccio in the box

SBA driver doesn't have to worry about those issues.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

Use insert_resource instead of request_resource now that the subdevices
will already have their resources claimed

Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>

re-enable use of "inline" for perf critical functions.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

2.6.12-rc4-pa5 fix sign extension of MMIO range

Fixes the problem of claiming a range that is disabled on 64-bit kernel:
ccio_init_resource() claimed CCIO bus address space (ffffffff00000000,
ffffffffffffffff)
also removes use of __FILE__.
Tested on both 32 and 64-bit systems by Joel.

From: Joel Soete <soete.joel@tiscali.be>
Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

2.6.12-rc1-pa7 incorrect BUG_ON in ccio

ccio-dma.c line 1317 was preventing K-class with 4GB RAM from booting.
Any ccio machine with >=2GB of RAM would have (incorrectly) triggered this.

Signed-off-by: Grant Grundler <grundler@parisc-linux.org>

Convert to ioremap and __raw_read/write

Signed-off-by: Matthew Wilcox <willy@parisc-linux.org>

Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
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Grant Grundler authored and Kyle McMartin committed Oct 22, 2005
1 parent 64908ad commit 86a61ee
Showing 1 changed file with 78 additions and 58 deletions.
136 changes: 78 additions & 58 deletions drivers/parisc/ccio-dma.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -100,9 +100,9 @@
#define DBG_RUN_SG(x...)
#endif

#define CCIO_INLINE /* inline */
#define WRITE_U32(value, addr) gsc_writel(value, (u32 *)(addr))
#define READ_U32(addr) gsc_readl((u32 *)(addr))
#define CCIO_INLINE inline
#define WRITE_U32(value, addr) __raw_writel(value, addr)
#define READ_U32(addr) __raw_readl(addr)

#define U2_IOA_RUNWAY 0x580
#define U2_BC_GSC 0x501
Expand All @@ -115,28 +115,28 @@

struct ioa_registers {
/* Runway Supervisory Set */
volatile int32_t unused1[12];
volatile uint32_t io_command; /* Offset 12 */
volatile uint32_t io_status; /* Offset 13 */
volatile uint32_t io_control; /* Offset 14 */
volatile int32_t unused2[1];
int32_t unused1[12];
uint32_t io_command; /* Offset 12 */
uint32_t io_status; /* Offset 13 */
uint32_t io_control; /* Offset 14 */
int32_t unused2[1];

/* Runway Auxiliary Register Set */
volatile uint32_t io_err_resp; /* Offset 0 */
volatile uint32_t io_err_info; /* Offset 1 */
volatile uint32_t io_err_req; /* Offset 2 */
volatile uint32_t io_err_resp_hi; /* Offset 3 */
volatile uint32_t io_tlb_entry_m; /* Offset 4 */
volatile uint32_t io_tlb_entry_l; /* Offset 5 */
volatile uint32_t unused3[1];
volatile uint32_t io_pdir_base; /* Offset 7 */
volatile uint32_t io_io_low_hv; /* Offset 8 */
volatile uint32_t io_io_high_hv; /* Offset 9 */
volatile uint32_t unused4[1];
volatile uint32_t io_chain_id_mask; /* Offset 11 */
volatile uint32_t unused5[2];
volatile uint32_t io_io_low; /* Offset 14 */
volatile uint32_t io_io_high; /* Offset 15 */
uint32_t io_err_resp; /* Offset 0 */
uint32_t io_err_info; /* Offset 1 */
uint32_t io_err_req; /* Offset 2 */
uint32_t io_err_resp_hi; /* Offset 3 */
uint32_t io_tlb_entry_m; /* Offset 4 */
uint32_t io_tlb_entry_l; /* Offset 5 */
uint32_t unused3[1];
uint32_t io_pdir_base; /* Offset 7 */
uint32_t io_io_low_hv; /* Offset 8 */
uint32_t io_io_high_hv; /* Offset 9 */
uint32_t unused4[1];
uint32_t io_chain_id_mask; /* Offset 11 */
uint32_t unused5[2];
uint32_t io_io_low; /* Offset 14 */
uint32_t io_io_high; /* Offset 15 */
};

/*
Expand Down Expand Up @@ -226,7 +226,7 @@ struct ioa_registers {
*/

struct ioc {
struct ioa_registers *ioc_hpa; /* I/O MMU base address */
struct ioa_registers __iomem *ioc_regs; /* I/O MMU base address */
u8 *res_map; /* resource map, bit == pdir entry */
u64 *pdir_base; /* physical base address */
u32 pdir_size; /* bytes, function of IOV Space size */
Expand Down Expand Up @@ -595,7 +595,7 @@ ccio_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
** Grab virtual index [0:11]
** Deposit virt_idx bits into I/O PDIR word
*/
asm volatile ("lci 0(%%sr1, %1), %0" : "=r" (ci) : "r" (vba));
asm volatile ("lci %%r0(%%sr1, %1), %0" : "=r" (ci) : "r" (vba));
asm volatile ("extru %1,19,12,%0" : "+r" (ci) : "r" (ci));
asm volatile ("depw %1,15,12,%0" : "+r" (pa) : "r" (ci));

Expand All @@ -613,7 +613,7 @@ ccio_io_pdir_entry(u64 *pdir_ptr, space_t sid, unsigned long vba,
** the real mode coherence index generation of U2, the PDIR entry
** must be flushed to memory to retain coherence."
*/
asm volatile("fdc 0(%0)" : : "r" (pdir_ptr));
asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr));
asm volatile("sync");
}

Expand All @@ -636,7 +636,7 @@ ccio_clear_io_tlb(struct ioc *ioc, dma_addr_t iovp, size_t byte_cnt)
byte_cnt += chain_size;

while(byte_cnt > chain_size) {
WRITE_U32(CMD_TLB_PURGE | iovp, &ioc->ioc_hpa->io_command);
WRITE_U32(CMD_TLB_PURGE | iovp, &ioc->ioc_regs->io_command);
iovp += chain_size;
byte_cnt -= chain_size;
}
Expand Down Expand Up @@ -684,7 +684,7 @@ ccio_mark_invalid(struct ioc *ioc, dma_addr_t iova, size_t byte_cnt)
** Hopefully someone figures out how to patch (NOP) the
** FDC/SYNC out at boot time.
*/
asm volatile("fdc 0(%0)" : : "r" (pdir_ptr[7]));
asm volatile("fdc %%r0(%0)" : : "r" (pdir_ptr[7]));

iovp += IOVP_SIZE;
byte_cnt -= IOVP_SIZE;
Expand Down Expand Up @@ -1314,28 +1314,26 @@ ccio_ioc_init(struct ioc *ioc)

ioc->pdir_size = (iova_space_size / IOVP_SIZE) * sizeof(u64);

BUG_ON(ioc->pdir_size >= 4 * 1024 * 1024); /* max pdir size < 4MB */
BUG_ON(ioc->pdir_size > 8 * 1024 * 1024); /* max pdir size <= 8MB */

/* Verify it's a power of two */
BUG_ON((1 << get_order(ioc->pdir_size)) != (ioc->pdir_size >> PAGE_SHIFT));

DBG_INIT("%s() hpa 0x%lx mem %luMB IOV %dMB (%d bits)\n",
__FUNCTION__,
ioc->ioc_hpa,
DBG_INIT("%s() hpa 0x%p mem %luMB IOV %dMB (%d bits)\n",
__FUNCTION__, ioc->ioc_regs,
(unsigned long) num_physpages >> (20 - PAGE_SHIFT),
iova_space_size>>20,
iov_order + PAGE_SHIFT);

ioc->pdir_base = (u64 *)__get_free_pages(GFP_KERNEL,
get_order(ioc->pdir_size));
if(NULL == ioc->pdir_base) {
panic("%s:%s() could not allocate I/O Page Table\n", __FILE__,
__FUNCTION__);
panic("%s() could not allocate I/O Page Table\n", __FUNCTION__);
}
memset(ioc->pdir_base, 0, ioc->pdir_size);

BUG_ON((((unsigned long)ioc->pdir_base) & PAGE_MASK) != (unsigned long)ioc->pdir_base);
DBG_INIT(" base %p", ioc->pdir_base);
DBG_INIT(" base %p\n", ioc->pdir_base);

/* resource map size dictated by pdir_size */
ioc->res_size = (ioc->pdir_size / sizeof(u64)) >> 3;
Expand All @@ -1344,8 +1342,7 @@ ccio_ioc_init(struct ioc *ioc)
ioc->res_map = (u8 *)__get_free_pages(GFP_KERNEL,
get_order(ioc->res_size));
if(NULL == ioc->res_map) {
panic("%s:%s() could not allocate resource map\n", __FILE__,
__FUNCTION__);
panic("%s() could not allocate resource map\n", __FUNCTION__);
}
memset(ioc->res_map, 0, ioc->res_size);

Expand All @@ -1366,44 +1363,58 @@ ccio_ioc_init(struct ioc *ioc)
** Initialize IOA hardware
*/
WRITE_U32(CCIO_CHAINID_MASK << ioc->chainid_shift,
&ioc->ioc_hpa->io_chain_id_mask);
&ioc->ioc_regs->io_chain_id_mask);

WRITE_U32(virt_to_phys(ioc->pdir_base),
&ioc->ioc_hpa->io_pdir_base);
&ioc->ioc_regs->io_pdir_base);

/*
** Go to "Virtual Mode"
*/
WRITE_U32(IOA_NORMAL_MODE, &ioc->ioc_hpa->io_control);
WRITE_U32(IOA_NORMAL_MODE, &ioc->ioc_regs->io_control);

/*
** Initialize all I/O TLB entries to 0 (Valid bit off).
*/
WRITE_U32(0, &ioc->ioc_hpa->io_tlb_entry_m);
WRITE_U32(0, &ioc->ioc_hpa->io_tlb_entry_l);
WRITE_U32(0, &ioc->ioc_regs->io_tlb_entry_m);
WRITE_U32(0, &ioc->ioc_regs->io_tlb_entry_l);

for(i = 1 << CCIO_CHAINID_SHIFT; i ; i--) {
WRITE_U32((CMD_TLB_DIRECT_WRITE | (i << ioc->chainid_shift)),
&ioc->ioc_hpa->io_command);
&ioc->ioc_regs->io_command);
}
}

static void
ccio_init_resource(struct resource *res, char *name, unsigned long ioaddr)
ccio_init_resource(struct resource *res, char *name, void __iomem *ioaddr)
{
int result;

res->parent = NULL;
res->flags = IORESOURCE_MEM;
res->start = (unsigned long)(signed) __raw_readl(ioaddr) << 16;
res->end = (unsigned long)(signed) (__raw_readl(ioaddr + 4) << 16) - 1;
/*
* bracing ((signed) ...) are required for 64bit kernel because
* we only want to sign extend the lower 16 bits of the register.
* The upper 16-bits of range registers are hardcoded to 0xffff.
*/
res->start = (unsigned long)((signed) READ_U32(ioaddr) << 16);
res->end = (unsigned long)((signed) (READ_U32(ioaddr + 4) << 16) - 1);
res->name = name;
/*
* Check if this MMIO range is disable
*/
if (res->end + 1 == res->start)
return;
result = request_resource(&iomem_resource, res);

/* On some platforms (e.g. K-Class), we have already registered
* resources for devices reported by firmware. Some are children
* of ccio.
* "insert" ccio ranges in the mmio hierarchy (/proc/iomem).
*/
result = insert_resource(&iomem_resource, res);
if (result < 0) {
printk(KERN_ERR "%s: failed to claim CCIO bus address space (%08lx,%08lx)\n",
__FILE__, res->start, res->end);
printk(KERN_ERR "%s() failed to claim CCIO bus address space (%08lx,%08lx)\n",
__FUNCTION__, res->start, res->end);
}
}

Expand All @@ -1414,9 +1425,8 @@ static void __init ccio_init_resources(struct ioc *ioc)

sprintf(name, "GSC Bus [%d/]", ioc->hw_path);

ccio_init_resource(res, name, (unsigned long)&ioc->ioc_hpa->io_io_low);
ccio_init_resource(res + 1, name,
(unsigned long)&ioc->ioc_hpa->io_io_low_hv);
ccio_init_resource(res, name, &ioc->ioc_regs->io_io_low);
ccio_init_resource(res + 1, name, &ioc->ioc_regs->io_io_low_hv);
}

static int new_ioc_area(struct resource *res, unsigned long size,
Expand All @@ -1427,7 +1437,12 @@ static int new_ioc_area(struct resource *res, unsigned long size,

res->start = (max - size + 1) &~ (align - 1);
res->end = res->start + size;
if (!request_resource(&iomem_resource, res))

/* We might be trying to expand the MMIO range to include
* a child device that has already registered it's MMIO space.
* Use "insert" instead of request_resource().
*/
if (!insert_resource(&iomem_resource, res))
return 0;

return new_ioc_area(res, size, min, max - size, align);
Expand Down Expand Up @@ -1486,15 +1501,15 @@ int ccio_allocate_resource(const struct parisc_device *dev,

if (!expand_ioc_area(parent, size, min, max, align)) {
__raw_writel(((parent->start)>>16) | 0xffff0000,
(unsigned long)&(ioc->ioc_hpa->io_io_low));
&ioc->ioc_regs->io_io_low);
__raw_writel(((parent->end)>>16) | 0xffff0000,
(unsigned long)&(ioc->ioc_hpa->io_io_high));
&ioc->ioc_regs->io_io_high);
} else if (!expand_ioc_area(parent + 1, size, min, max, align)) {
parent++;
__raw_writel(((parent->start)>>16) | 0xffff0000,
(unsigned long)&(ioc->ioc_hpa->io_io_low_hv));
&ioc->ioc_regs->io_io_low_hv);
__raw_writel(((parent->end)>>16) | 0xffff0000,
(unsigned long)&(ioc->ioc_hpa->io_io_high_hv));
&ioc->ioc_regs->io_io_high_hv);
} else {
return -EBUSY;
}
Expand All @@ -1521,7 +1536,12 @@ int ccio_request_resource(const struct parisc_device *dev,
return -EBUSY;
}

return request_resource(parent, res);
/* "transparent" bus bridges need to register MMIO resources
* firmware assigned them. e.g. children of hppb.c (e.g. K-class)
* registered their resources in the PDC "bus walk" (See
* arch/parisc/kernel/inventory.c).
*/
return insert_resource(parent, res);
}

/**
Expand Down

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