/***************************************************************************
* Copyright (c) 2005-2009, Broadcom Corporation.
*
* Name: crystalhd_misc . c
*
* Description:
* BCM70012 Linux driver misc routines.
*
* HISTORY:
*
**********************************************************************
* This file is part of the crystalhd device driver.
*
* This driver is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, version 2 of the License.
*
* This driver is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this driver. If not, see <http://www.gnu.org/licenses/>.
**********************************************************************/
#include <linux/slab.h>
#include "crystalhd_misc.h"
#include "crystalhd_lnx.h"
uint32_t g_linklog_level;
static inline uint32_t crystalhd_dram_rd(struct crystalhd_adp *adp, uint32_t mem_off)
{
crystalhd_reg_wr(adp, DCI_DRAM_BASE_ADDR, (mem_off >> 19));
return bc_dec_reg_rd(adp, (0x00380000 | (mem_off & 0x0007FFFF)));
}
static inline void crystalhd_dram_wr(struct crystalhd_adp *adp, uint32_t mem_off, uint32_t val)
{
crystalhd_reg_wr(adp, DCI_DRAM_BASE_ADDR, (mem_off >> 19));
bc_dec_reg_wr(adp, (0x00380000 | (mem_off & 0x0007FFFF)), val);
}
static inline enum BC_STATUS bc_chk_dram_range(struct crystalhd_adp *adp, uint32_t start_off, uint32_t cnt)
{
return BC_STS_SUCCESS;
}
static struct crystalhd_dio_req *crystalhd_alloc_dio(struct crystalhd_adp *adp)
{
unsigned long flags = 0;
struct crystalhd_dio_req *temp = NULL;
if (!adp) {
BCMLOG_ERR("Invalid Arg!!\n");
return temp;
}
spin_lock_irqsave(&adp->lock, flags);
temp = adp->ua_map_free_head;
if (temp)
adp->ua_map_free_head = adp->ua_map_free_head->next;
spin_unlock_irqrestore(&adp->lock, flags);
return temp;
}
static void crystalhd_free_dio(struct crystalhd_adp *adp, struct crystalhd_dio_req *dio)
{
unsigned long flags = 0;
if (!adp || !dio)
return;
spin_lock_irqsave(&adp->lock, flags);
dio->sig = crystalhd_dio_inv;
dio->page_cnt = 0;
dio->fb_size = 0;
memset(&dio->uinfo, 0, sizeof(dio->uinfo));
dio->next = adp->ua_map_free_head;
adp->ua_map_free_head = dio;
spin_unlock_irqrestore(&adp->lock, flags);
}
static struct crystalhd_elem *crystalhd_alloc_elem(struct crystalhd_adp *adp)
{
unsigned long flags = 0;
struct crystalhd_elem *temp = NULL;
if (!adp)
return temp;
spin_lock_irqsave(&adp->lock, flags);
temp = adp->elem_pool_head;
if (temp) {
adp->elem_pool_head = adp->elem_pool_head->flink;
memset(temp, 0, sizeof(*temp));
}
spin_unlock_irqrestore(&adp->lock, flags);
return temp;
}
static void crystalhd_free_elem(struct crystalhd_adp *adp, struct crystalhd_elem *elem)
{
unsigned long flags = 0;
if (!adp || !elem)
return;
spin_lock_irqsave(&adp->lock, flags);
elem->flink = adp->elem_pool_head;
adp->elem_pool_head = elem;
spin_unlock_irqrestore(&adp->lock, flags);
}
static inline void crystalhd_set_sg(struct scatterlist *sg, struct page *page,
unsigned int len, unsigned int offset)
{
sg_set_page(sg, page, len, offset);
#ifdef CONFIG_X86_64
sg->dma_length = len;
#endif
}
static inline void crystalhd_init_sg(struct scatterlist *sg, unsigned int entries)
{
/* http://lkml.org/lkml/2007/11/27/68 */
sg_init_table(sg, entries);
}
/*========================== Extern ========================================*/
/**
* bc_dec_reg_rd - Read 7412's device register.
* @adp: Adapter instance
* @reg_off: Register offset.
*
* Return:
* 32bit value read
*
* 7412's device register read routine. This interface use
* 7412's device access range mapped from BAR-2 (4M) of PCIe
* configuration space.
*/
uint32_t bc_dec_reg_rd(struct crystalhd_adp *adp, uint32_t reg_off)
{
if (!adp || (reg_off > adp->pci_mem_len)) {
BCMLOG_ERR("dec_rd_reg_off outof range: 0x%08x\n", reg_off);
return 0;
}
return readl(adp->addr + reg_off);
}
/**
* bc_dec_reg_wr - Write 7412's device register
* @adp: Adapter instance
* @reg_off: Register offset.
* @val: Dword value to be written.
*
* Return:
* none.
*
* 7412's device register write routine. This interface use
* 7412's device access range mapped from BAR-2 (4M) of PCIe
* configuration space.
*/
void bc_dec_reg_wr(struct crystalhd_adp *adp, uint32_t reg_off, uint32_t val)
{
if (!adp || (reg_off > adp->pci_mem_len)) {
BCMLOG_ERR("dec_wr_reg_off outof range: 0x%08x\n", reg_off);
return;
}
writel(val, adp->addr + reg_off);
udelay(8);
}
/**
* crystalhd_reg_rd - Read Link's device register.
* @adp: Adapter instance
* @reg_off: Register offset.
*
* Return:
* 32bit value read
*
* Link device register read routine. This interface use
* Link's device access range mapped from BAR-1 (64K) of PCIe
* configuration space.
*
*/
uint32_t crystalhd_reg_rd(struct crystalhd_adp *adp, uint32_t reg_off)
{
if (!adp || (reg_off > adp->pci_i2o_len)) {
BCMLOG_ERR("link_rd_reg_off outof range: 0x%08x\n", reg_off);
return 0;
}
return readl(adp->i2o_addr + reg_off);
}
/**
* crystalhd_reg_wr - Write Link's device register
* @adp: Adapter instance
* @reg_off: Register offset.
* @val: Dword value to be written.
*
* Return:
* none.
*
* Link device register write routine. This interface use
* Link's device access range mapped from BAR-1 (64K) of PCIe
* configuration space.
*
*/
void crystalhd_reg_wr(struct crystalhd_adp *adp, uint32_t reg_off, uint32_t val)
{
if (!adp || (reg_off > adp->pci_i2o_len)) {
BCMLOG_ERR("link_wr_reg_off outof range: 0x%08x\n", reg_off);
return;
}
writel(val, adp->i2o_addr + reg_off);
}
/**
* crystalhd_mem_rd - Read data from 7412's DRAM area.
* @adp: Adapter instance
* @start_off: Start offset.
* @dw_cnt: Count in dwords.
* @rd_buff: Buffer to copy the data from dram.
*
* Return:
* Status.
*
* 7412's Dram read routine.
*/
enum BC_STATUS crystalhd_mem_rd(struct crystalhd_adp *adp, uint32_t start_off,
uint32_t dw_cnt, uint32_t *rd_buff)
{
uint32_t ix = 0;
if (!adp || !rd_buff ||
(bc_chk_dram_range(adp, start_off, dw_cnt) != BC_STS_SUCCESS)) {
BCMLOG_ERR("Invalid arg\n");
return BC_STS_INV_ARG;
}
for (ix = 0; ix < dw_cnt; ix++)
rd_buff[ix] = crystalhd_dram_rd(adp, (start_off + (ix * 4)));
return BC_STS_SUCCESS;
}
/**
* crystalhd_mem_wr - Write data to 7412's DRAM area.
* @adp: Adapter instance
* @start_off: Start offset.
* @dw_cnt: Count in dwords.
* @wr_buff: Data Buffer to be written.
*
* Return:
* Status.
*
* 7412's Dram write routine.
*/
enum BC_STATUS crystalhd_mem_wr(struct crystalhd_adp *adp, uint32_t start_off,
uint32_t dw_cnt, uint32_t *wr_buff)
{
uint32_t ix = 0;
if (!adp || !wr_buff ||
(bc_chk_dram_range(adp, start_off, dw_cnt) != BC_STS_SUCCESS)) {
BCMLOG_ERR("Invalid arg\n");
return BC_STS_INV_ARG;
}
for (ix = 0; ix < dw_cnt; ix++)
crystalhd_dram_wr(adp, (start_off + (ix * 4)), wr_buff[ix]);
return BC_STS_SUCCESS;
}
/**
* crystalhd_pci_cfg_rd - PCIe config read
* @adp: Adapter instance
* @off: PCI config space offset.
* @len: Size -- Byte, Word & dword.
* @val: Value read
*
* Return:
* Status.
*
* Get value from Link's PCIe config space.
*/
enum BC_STATUS crystalhd_pci_cfg_rd(struct crystalhd_adp *adp, uint32_t off,
uint32_t len, uint32_t *val)
{
enum BC_STATUS sts = BC_STS_SUCCESS;
int rc = 0;
if (!adp || !val) {
BCMLOG_ERR("Invalid arg\n");
return BC_STS_INV_ARG;
}
switch (len) {
case 1:
rc = pci_read_config_byte(adp->pdev, off, (u8 *)val);
break;
case 2:
rc = pci_read_config_word(adp->pdev, off, (u16 *)val);
break;
case 4:
rc = pci_read_config_dword(adp->pdev, off, (u32 *)val);
break;
default:
rc = -EINVAL;
sts = BC_STS_INV_ARG;
BCMLOG_ERR("Invalid len:%d\n", len);
};
if (rc && (sts == BC_STS_SUCCESS))
sts = BC_STS_ERROR;
return sts;
}
/**
* crystalhd_pci_cfg_wr - PCIe config write
* @adp: Adapter instance
* @off: PCI config space offset.
* @len: Size -- Byte, Word & dword.
* @val: Value to be written
*
* Return:
* Status.
*
* Set value to Link's PCIe config space.
*/
enum BC_STATUS crystalhd_pci_cfg_wr(struct crystalhd_adp *adp, uint32_t off,
uint32_t len, uint32_t val)
{
enum BC_STATUS sts = BC_STS_SUCCESS;
int rc = 0;
if (!adp || !val) {
BCMLOG_ERR("Invalid arg\n");
return BC_STS_INV_ARG;
}
switch (len) {
case 1:
rc = pci_write_config_byte(adp->pdev, off, (u8)val);
break;
case 2:
rc = pci_write_config_word(adp->pdev, off, (u16)val);
break;
case 4:
rc = pci_write_config_dword(adp->pdev, off, val);
break;
default:
rc = -EINVAL;
sts = BC_STS_INV_ARG;
BCMLOG_ERR("Invalid len:%d\n", len);
};
if (rc && (sts == BC_STS_SUCCESS))
sts = BC_STS_ERROR;
return sts;
}
/**
* bc_kern_dma_alloc - Allocate memory for Dma rings
* @adp: Adapter instance
* @sz: Size of the memory to allocate.
* @phy_addr: Physical address of the memory allocated.
* Typedef to system's dma_addr_t (u64)
*
* Return:
* Pointer to allocated memory..
*
* Wrapper to Linux kernel interface.
*
*/
void *bc_kern_dma_alloc(struct crystalhd_adp *adp, uint32_t sz,
dma_addr_t *phy_addr)
{
void *temp = NULL;
if (!adp || !sz || !phy_addr) {
BCMLOG_ERR("Invalide Arg..\n");
return temp;
}
temp = pci_alloc_consistent(adp->pdev, sz, phy_addr);
if (temp)
memset(temp, 0, sz);
return temp;
}
/**
* bc_kern_dma_free - Release Dma ring memory.
* @adp: Adapter instance
* @sz: Size of the memory to allocate.
* @ka: Kernel virtual address returned during _dio_alloc()
* @phy_addr: Physical address of the memory allocated.
* Typedef to system's dma_addr_t (u64)
*
* Return:
* none.
*/
void bc_kern_dma_free(struct crystalhd_adp *adp, uint32_t sz, void *ka,
dma_addr_t phy_addr)
{
if (!adp || !ka || !sz || !phy_addr) {
BCMLOG_ERR("Invalide Arg..\n");
return;
}
pci_free_consistent(adp->pdev, sz, ka, phy_addr);
}
/**
* crystalhd_create_dioq - Create Generic DIO queue
* @adp: Adapter instance
* @dioq_hnd: Handle to the dio queue created
* @cb : Optional - Call back To free the element.
* @cbctx: Context to pass to callback.
*
* Return:
* status
*
* Initialize Generic DIO queue to hold any data. Callback
* will be used to free elements while deleting the queue.
*/
enum BC_STATUS crystalhd_create_dioq(struct crystalhd_adp *adp,
struct crystalhd_dioq **dioq_hnd,
crystalhd_data_free_cb cb, void *cbctx)
{
struct crystalhd_dioq *dioq = NULL;
if (!adp || !dioq_hnd) {
BCMLOG_ERR("Invalid arg!!\n");
return BC_STS_INV_ARG;
}
dioq = kzalloc(sizeof(*dioq), GFP_KERNEL);
if (!dioq)
return BC_STS_INSUFF_RES;
spin_lock_init(&dioq->lock);
dioq->sig = BC_LINK_DIOQ_SIG;
dioq->head = (struct crystalhd_elem *)&dioq->head;
dioq->tail = (struct crystalhd_elem *)&dioq->head;
crystalhd_create_event(&dioq->event);
dioq->adp = adp;
dioq->data_rel_cb = cb;
dioq->cb_context = cbctx;
*dioq_hnd = dioq;
return BC_STS_SUCCESS;
}
/**
* crystalhd_delete_dioq - Delete Generic DIO queue
* @adp: Adapter instance
* @dioq: DIOQ instance..
*
* Return:
* None.
*
* Release Generic DIO queue. This function will remove
* all the entries from the Queue and will release data
* by calling the call back provided during creation.
*
*/
void crystalhd_delete_dioq(struct crystalhd_adp *adp, struct crystalhd_dioq *dioq)
{
void *temp;
if (!dioq || (dioq->sig != BC_LINK_DIOQ_SIG))
return;
do {
temp = crystalhd_dioq_fetch(dioq);
if (temp && dioq->data_rel_cb)
dioq->data_rel_cb(dioq->cb_context, temp);
} while (temp);
dioq->sig = 0;
kfree(dioq);
}
/**
* crystalhd_dioq_add - Add new DIO request element.
* @ioq: DIO queue instance
* @t: DIO request to be added.
* @wake: True - Wake up suspended process.
* @tag: Special tag to assign - For search and get.
*
* Return:
* Status.
*
* Insert new element to Q tail.
*/
enum BC_STATUS crystalhd_dioq_add(struct crystalhd_dioq *ioq, void *data,
bool wake, uint32_t tag)
{
unsigned long flags = 0;
struct crystalhd_elem *tmp;
if (!ioq || (ioq->sig != BC_LINK_DIOQ_SIG) || !data) {
BCMLOG_ERR("Invalid arg!!\n");
return BC_STS_INV_ARG;
}
tmp = crystalhd_alloc_elem(ioq->adp);
if (!tmp) {
BCMLOG_ERR("No free elements.\n");
return BC_STS_INSUFF_RES;
}
tmp->data = data;
tmp->tag = tag;
spin_lock_irqsave(&ioq->lock, flags);
tmp->flink = (struct crystalhd_elem *)&ioq->head;
tmp->blink = ioq->tail;
tmp->flink->blink = tmp;
tmp->blink->flink = tmp;
ioq->count++;
spin_unlock_irqrestore(&ioq->lock, flags);
if (wake)
crystalhd_set_event(&ioq->event);
return BC_STS_SUCCESS;
}
/**
* crystalhd_dioq_fetch - Fetch element from head.
* @ioq: DIO queue instance
*
* Return:
* data element from the head..
*
* Remove an element from Queue.
*/
void *crystalhd_dioq_fetch(struct crystalhd_dioq *ioq)
{
unsigned long flags = 0;
struct crystalhd_elem *tmp;
struct crystalhd_elem *ret = NULL;
void *data = NULL;
if (!ioq || (ioq->sig != BC_LINK_DIOQ_SIG)) {
BCMLOG_ERR("Invalid arg!!\n");
return data;
}
spin_lock_irqsave(&ioq->lock, flags);
tmp = ioq->head;
if (tmp != (struct crystalhd_elem *)&ioq->head) {
ret = tmp;
tmp->flink->blink = tmp->blink;
tmp->blink->flink = tmp->flink;
ioq->count--;
}
spin_unlock_irqrestore(&ioq->lock, flags);
if (ret) {
data = ret->data;
crystalhd_free_elem(ioq->adp, ret);
}
return data;
}
/**
* crystalhd_dioq_find_and_fetch - Search the tag and Fetch element
* @ioq: DIO queue instance
* @tag: Tag to search for.
*
* Return:
* element from the head..
*
* Search TAG and remove the element.
*/
void *crystalhd_dioq_find_and_fetch(struct crystalhd_dioq *ioq, uint32_t tag)
{
unsigned long flags = 0;
struct crystalhd_elem *tmp;
struct crystalhd_elem *ret = NULL;
void *data = NULL;
if (!ioq || (ioq->sig != BC_LINK_DIOQ_SIG)) {
BCMLOG_ERR("Invalid arg!!\n");
return data;
}
spin_lock_irqsave(&ioq->lock, flags);
tmp = ioq->head;
while (tmp != (struct crystalhd_elem *)&ioq->head) {
if (tmp->tag == tag) {
ret = tmp;
tmp->flink->blink = tmp->blink;
tmp->blink->flink = tmp->flink;
ioq->count--;
break;
}
tmp = tmp->flink;
}
spin_unlock_irqrestore(&ioq->lock, flags);
if (ret) {
data = ret->data;
crystalhd_free_elem(ioq->adp, ret);
}
return data;
}
/**
* crystalhd_dioq_fetch_wait - Fetch element from Head.
* @ioq: DIO queue instance
* @to_secs: Wait timeout in seconds..
*
* Return:
* element from the head..
*
* Return element from head if Q is not empty. Wait for new element
* if Q is empty for Timeout seconds.
*/
void *crystalhd_dioq_fetch_wait(struct crystalhd_dioq *ioq, uint32_t to_secs,
uint32_t *sig_pend)
{
unsigned long flags = 0;
int rc = 0, count;
void *tmp = NULL;
if (!ioq || (ioq->sig != BC_LINK_DIOQ_SIG) || !to_secs || !sig_pend) {
BCMLOG_ERR("Invalid arg!!\n");
return tmp;
}
count = to_secs;
spin_lock_irqsave(&ioq->lock, flags);
while ((ioq->count == 0) && count) {
spin_unlock_irqrestore(&ioq->lock, flags);
crystalhd_wait_on_event(&ioq->event, (ioq->count > 0), 1000, rc, 0);
if (rc == 0) {
goto out;
} else if (rc == -EINTR) {
BCMLOG(BCMLOG_INFO, "Cancelling fetch wait\n");
*sig_pend = 1;
return tmp;
}
spin_lock_irqsave(&ioq->lock, flags);
count--;
}
spin_unlock_irqrestore(&ioq->lock, flags);
out:
return crystalhd_dioq_fetch(ioq);
}
/**
* crystalhd_map_dio - Map user address for DMA
* @adp: Adapter instance
* @ubuff: User buffer to map.
* @ubuff_sz: User buffer size.
* @uv_offset: UV buffer offset.
* @en_422mode: TRUE:422 FALSE:420 Capture mode.
* @dir_tx: TRUE for Tx (To device from host)
* @dio_hnd: Handle to mapped DIO request.
*
* Return:
* Status.
*
* This routine maps user address and lock pages for DMA.
*
*/
enum BC_STATUS crystalhd_map_dio(struct crystalhd_adp *adp, void *ubuff,
uint32_t ubuff_sz, uint32_t uv_offset,
bool en_422mode, bool dir_tx,
struct crystalhd_dio_req **dio_hnd)
{
struct crystalhd_dio_req *dio;
/* FIXME: jarod: should some of these unsigned longs be uint32_t or uintptr_t? */
unsigned long start = 0, end = 0, uaddr = 0, count = 0;
unsigned long spsz = 0, uv_start = 0;
int i = 0, rw = 0, res = 0, nr_pages = 0, skip_fb_sg = 0;
if (!adp || !ubuff || !ubuff_sz || !dio_hnd) {
BCMLOG_ERR("Invalid arg\n");
return BC_STS_INV_ARG;
}
/* Compute pages */
uaddr = (unsigned long)ubuff;
count = (unsigned long)ubuff_sz;
end = (uaddr + count + PAGE_SIZE - 1) >> PAGE_SHIFT;
start = uaddr >> PAGE_SHIFT;
nr_pages = end - start;
if (!count || ((uaddr + count) < uaddr)) {
BCMLOG_ERR("User addr overflow!!\n");
return BC_STS_INV_ARG;
}
dio = crystalhd_alloc_dio(adp);
if (!dio) {
BCMLOG_ERR("dio pool empty..\n");
return BC_STS_INSUFF_RES;
}
if (dir_tx) {
rw = WRITE;
dio->direction = DMA_TO_DEVICE;
} else {
rw = READ;
dio->direction = DMA_FROM_DEVICE;
}
if (nr_pages > dio->max_pages) {
BCMLOG_ERR("max_pages(%d) exceeded(%d)!!\n",
dio->max_pages, nr_pages);
crystalhd_unmap_dio(adp, dio);
return BC_STS_INSUFF_RES;
}
if (uv_offset) {
uv_start = (uaddr + (unsigned long)uv_offset) >> PAGE_SHIFT;
dio->uinfo.uv_sg_ix = uv_start - start;
dio->uinfo.uv_sg_off = ((uaddr + (unsigned long)uv_offset) & ~PAGE_MASK);
}
dio->fb_size = ubuff_sz & 0x03;
if (dio->fb_size) {
res = copy_from_user(dio->fb_va,
(void *)(uaddr + count - dio->fb_size),
dio->fb_size);
if (res) {
BCMLOG_ERR("failed %d to copy %u fill bytes from %p\n",
res, dio->fb_size,
(void *)(uaddr + count-dio->fb_size));
crystalhd_unmap_dio(adp, dio);
return BC_STS_INSUFF_RES;
}
}
down_read(¤t->mm->mmap_sem);
res = get_user_pages(current, current->mm, uaddr, nr_pages, rw == READ,
0, dio->pages, NULL);
up_read(¤t->mm->mmap_sem);
/* Save for release..*/
dio->sig = crystalhd_dio_locked;
if (res < nr_pages) {
BCMLOG_ERR("get pages failed: %d-%d\n", nr_pages, res);
dio->page_cnt = res;
crystalhd_unmap_dio(adp, dio);
return BC_STS_ERROR;
}
dio->page_cnt = nr_pages;
/* Get scatter/gather */
crystalhd_init_sg(dio->sg, dio->page_cnt);
crystalhd_set_sg(&dio->sg[0], dio->pages[0], 0, uaddr & ~PAGE_MASK);
if (nr_pages > 1) {
dio->sg[0].length = PAGE_SIZE - dio->sg[0].offset;
#ifdef CONFIG_X86_64
dio->sg[0].dma_length = dio->sg[0].length;
#endif
count -= dio->sg[0].length;
for (i = 1; i < nr_pages; i++) {
if (count < 4) {
spsz = count;
skip_fb_sg = 1;
} else {
spsz = (count < PAGE_SIZE) ?
(count & ~0x03) : PAGE_SIZE;
}
crystalhd_set_sg(&dio->sg[i], dio->pages[i], spsz, 0);
count -= spsz;
}
} else {
if (count < 4) {
dio->sg[0].length = count;
skip_fb_sg = 1;
} else {
dio->sg[0].length = count - dio->fb_size;
}
#ifdef CONFIG_X86_64
dio->sg[0].dma_length = dio->sg[0].length;
#endif
}
dio->sg_cnt = pci_map_sg(adp->pdev, dio->sg,
dio->page_cnt, dio->direction);
if (dio->sg_cnt <= 0) {
BCMLOG_ERR("sg map %d-%d\n", dio->sg_cnt, dio->page_cnt);
crystalhd_unmap_dio(adp, dio);
return BC_STS_ERROR;
}
if (dio->sg_cnt && skip_fb_sg)
dio->sg_cnt -= 1;
dio->sig = crystalhd_dio_sg_mapped;
/* Fill in User info.. */
dio->uinfo.xfr_len = ubuff_sz;
dio->uinfo.xfr_buff = ubuff;
dio->uinfo.uv_offset = uv_offset;
dio->uinfo.b422mode = en_422mode;
dio->uinfo.dir_tx = dir_tx;
*dio_hnd = dio;
return BC_STS_SUCCESS;
}
/**
* crystalhd_unmap_sgl - Release mapped resources
* @adp: Adapter instance
* @dio: DIO request instance
*
* Return:
* Status.
*
* This routine is to unmap the user buffer pages.
*/
enum BC_STATUS crystalhd_unmap_dio(struct crystalhd_adp *adp, struct crystalhd_dio_req *dio)
{
struct page *page = NULL;
int j = 0;
if (!adp || !dio) {
BCMLOG_ERR("Invalid arg\n");
return BC_STS_INV_ARG;
}
if ((dio->page_cnt > 0) && (dio->sig != crystalhd_dio_inv)) {
for (j = 0; j < dio->page_cnt; j++) {
page = dio->pages[j];
if (page) {
if (!PageReserved(page) &&
(dio->direction == DMA_FROM_DEVICE))
SetPageDirty(page);
page_cache_release(page);
}
}
}
if (dio->sig == crystalhd_dio_sg_mapped)
pci_unmap_sg(adp->pdev, dio->sg, dio->page_cnt, dio->direction);
crystalhd_free_dio(adp, dio);
return BC_STS_SUCCESS;
}
/**
* crystalhd_create_dio_pool - Allocate mem pool for DIO management.
* @adp: Adapter instance
* @max_pages: Max pages for size calculation.
*
* Return:
* system error.
*
* This routine creates a memory pool to hold dio context for
* for HW Direct IO operation.
*/
int crystalhd_create_dio_pool(struct crystalhd_adp *adp, uint32_t max_pages)
{
uint32_t asz = 0, i = 0;
uint8_t *temp;
struct crystalhd_dio_req *dio;
if (!adp || !max_pages) {
BCMLOG_ERR("Invalid Arg!!\n");
return -EINVAL;
}
/* Get dma memory for fill byte handling..*/
adp->fill_byte_pool = pci_pool_create("crystalhd_fbyte",
adp->pdev, 8, 8, 0);
if (!adp->fill_byte_pool) {
BCMLOG_ERR("failed to create fill byte pool\n");
return -ENOMEM;
}
/* Get the max size from user based on 420/422 modes */
asz = (sizeof(*dio->pages) * max_pages) +
(sizeof(*dio->sg) * max_pages) + sizeof(*dio);
BCMLOG(BCMLOG_DBG, "Initializing Dio pool %d %d %x %p\n",
BC_LINK_SG_POOL_SZ, max_pages, asz, adp->fill_byte_pool);
for (i = 0; i < BC_LINK_SG_POOL_SZ; i++) {
temp = kzalloc(asz, GFP_KERNEL);
if ((temp) == NULL) {
BCMLOG_ERR("Failed to alloc %d mem\n", asz);
return -ENOMEM;
}
dio = (struct crystalhd_dio_req *)temp;
temp += sizeof(*dio);
dio->pages = (struct page **)temp;
temp += (sizeof(*dio->pages) * max_pages);
dio->sg = (struct scatterlist *)temp;
dio->max_pages = max_pages;
dio->fb_va = pci_pool_alloc(adp->fill_byte_pool, GFP_KERNEL,
&dio->fb_pa);
if (!dio->fb_va) {
BCMLOG_ERR("fill byte alloc failed.\n");
return -ENOMEM;
}
crystalhd_free_dio(adp, dio);
}
return 0;
}
/**
* crystalhd_destroy_dio_pool - Release DIO mem pool.
* @adp: Adapter instance
*
* Return:
* none.
*
* This routine releases dio memory pool during close.
*/
void crystalhd_destroy_dio_pool(struct crystalhd_adp *adp)
{
struct crystalhd_dio_req *dio;
int count = 0;
if (!adp) {
BCMLOG_ERR("Invalid Arg!!\n");
return;
}
do {
dio = crystalhd_alloc_dio(adp);
if (dio) {
if (dio->fb_va)
pci_pool_free(adp->fill_byte_pool,
dio->fb_va, dio->fb_pa);
count++;
kfree(dio);
}
} while (dio);
if (adp->fill_byte_pool) {
pci_pool_destroy(adp->fill_byte_pool);
adp->fill_byte_pool = NULL;
}
BCMLOG(BCMLOG_DBG, "Released dio pool %d\n", count);
}
/**
* crystalhd_create_elem_pool - List element pool creation.
* @adp: Adapter instance
* @pool_size: Number of elements in the pool.
*
* Return:
* 0 - success, <0 error
*
* Create general purpose list element pool to hold pending,
* and active requests.
*/
int __devinit crystalhd_create_elem_pool(struct crystalhd_adp *adp,
uint32_t pool_size)
{
uint32_t i;
struct crystalhd_elem *temp;
if (!adp || !pool_size)
return -EINVAL;
for (i = 0; i < pool_size; i++) {
temp = kzalloc(sizeof(*temp), GFP_KERNEL);
if (!temp) {
BCMLOG_ERR("kalloc failed\n");
return -ENOMEM;
}
crystalhd_free_elem(adp, temp);
}
BCMLOG(BCMLOG_DBG, "allocated %d elem\n", pool_size);
return 0;
}
/**
* crystalhd_delete_elem_pool - List element pool deletion.
* @adp: Adapter instance
*
* Return:
* none
*
* Delete general purpose list element pool.
*/
void crystalhd_delete_elem_pool(struct crystalhd_adp *adp)
{
struct crystalhd_elem *temp;
int dbg_cnt = 0;
if (!adp)
return;
do {
temp = crystalhd_alloc_elem(adp);
if (temp) {
kfree(temp);
dbg_cnt++;
}
} while (temp);
BCMLOG(BCMLOG_DBG, "released %d elem\n", dbg_cnt);
}
/*================ Debug support routines.. ================================*/
void crystalhd_show_buffer(uint32_t off, uint8_t *buff, uint32_t dwcount)
{
uint32_t i, k = 1;
for (i = 0; i < dwcount; i++) {
if (k == 1)
BCMLOG(BCMLOG_DATA, "0x%08X : ", off);
BCMLOG(BCMLOG_DATA, " 0x%08X ", *((uint32_t *)buff));
buff += sizeof(uint32_t);
off += sizeof(uint32_t);
k++;
if ((i == dwcount - 1) || (k > 4)) {
BCMLOG(BCMLOG_DATA, "\n");
k = 1;
}
}
}