Size of pages are held by struct ib_umem in page_size field.
It is better to store it as an exponent, because page size by nature
is always power-of-two and used as a factor, divisor or ilog2's argument.
The conversion of page_size to be page_shift allows to have portable
code and avoid following error while compiling on ARM:
ERROR: "__aeabi_uldivmod" [drivers/infiniband/core/ib_core.ko] undefined!
CC: Selvin Xavier <selvin.xavier@broadcom.com>
CC: Steve Wise <swise@chelsio.com>
CC: Lijun Ou <oulijun@huawei.com>
CC: Shiraz Saleem <shiraz.saleem@intel.com>
CC: Adit Ranadive <aditr@vmware.com>
CC: Dennis Dalessandro <dennis.dalessandro@intel.com>
CC: Ram Amrani <Ram.Amrani@Cavium.com>
Signed-off-by: Artemy Kovalyov <artemyko@mellanox.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Acked-by: Ram Amrani <Ram.Amrani@cavium.com>
Acked-by: Shiraz Saleem <shiraz.saleem@intel.com>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Acked-by: Selvin Xavier <selvin.xavier@broadcom.com>
Acked-by: Adit Ranadive <aditr@vmware.com>
Signed-off-by: Doug Ledford <dledford@redhat.com>
if (!umem)
return ERR_PTR(-ENOMEM);
- umem->context = context;
- umem->length = size;
- umem->address = addr;
- umem->page_size = PAGE_SIZE;
- umem->pid = get_task_pid(current, PIDTYPE_PID);
+ umem->context = context;
+ umem->length = size;
+ umem->address = addr;
+ umem->page_shift = PAGE_SHIFT;
+ umem->pid = get_task_pid(current, PIDTYPE_PID);
/*
* We ask for writable memory if any of the following
* access flags are set. "Local write" and "remote write"
int ib_umem_page_count(struct ib_umem *umem)
{
- int shift;
int i;
int n;
struct scatterlist *sg;
if (umem->odp_data)
return ib_umem_num_pages(umem);
- shift = ilog2(umem->page_size);
-
n = 0;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, i)
- n += sg_dma_len(sg) >> shift;
+ n += sg_dma_len(sg) >> umem->page_shift;
return n;
}
if (!umem)
return ERR_PTR(-ENOMEM);
- umem->context = context;
- umem->length = size;
- umem->address = addr;
- umem->page_size = PAGE_SIZE;
- umem->writable = 1;
+ umem->context = context;
+ umem->length = size;
+ umem->address = addr;
+ umem->page_shift = PAGE_SHIFT;
+ umem->writable = 1;
odp_data = kzalloc(sizeof(*odp_data), GFP_KERNEL);
if (!odp_data) {
* invalidations, so we must make sure we free each page only
* once. */
mutex_lock(&umem->odp_data->umem_mutex);
- for (addr = virt; addr < bound; addr += (u64)umem->page_size) {
+ for (addr = virt; addr < bound; addr += BIT(umem->page_shift)) {
idx = (addr - ib_umem_start(umem)) / PAGE_SIZE;
if (umem->odp_data->page_list[idx]) {
struct page *page = umem->odp_data->page_list[idx];
struct bnxt_re_mr *mr;
struct ib_umem *umem;
u64 *pbl_tbl, *pbl_tbl_orig;
- int i, umem_pgs, pages, page_shift, rc;
+ int i, umem_pgs, pages, rc;
struct scatterlist *sg;
int entry;
}
pbl_tbl_orig = pbl_tbl;
- page_shift = ilog2(umem->page_size);
if (umem->hugetlb) {
dev_err(rdev_to_dev(rdev), "umem hugetlb not supported!");
rc = -EFAULT;
goto fail;
}
- if (umem->page_size != PAGE_SIZE) {
- dev_err(rdev_to_dev(rdev), "umem page size unsupported!");
+
+ if (umem->page_shift != PAGE_SHIFT) {
+ dev_err(rdev_to_dev(rdev), "umem page shift unsupported!");
rc = -EFAULT;
goto fail;
}
/* Map umem buf ptrs to the PBL */
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
- pages = sg_dma_len(sg) >> page_shift;
+ pages = sg_dma_len(sg) >> umem->page_shift;
for (i = 0; i < pages; i++, pbl_tbl++)
- *pbl_tbl = sg_dma_address(sg) + (i << page_shift);
+ *pbl_tbl = sg_dma_address(sg) + (i << umem->page_shift);
}
rc = bnxt_qplib_reg_mr(&rdev->qplib_res, &mr->qplib_mr, pbl_tbl_orig,
umem_pgs, false);
return ERR_PTR(err);
}
- shift = ffs(mhp->umem->page_size) - 1;
+ shift = mhp->umem->page_shift;
n = mhp->umem->nmap;
len = sg_dma_len(sg) >> shift;
for (k = 0; k < len; ++k) {
pages[i++] = cpu_to_be64(sg_dma_address(sg) +
- mhp->umem->page_size * k);
+ (k << shift));
if (i == PAGE_SIZE / sizeof *pages) {
err = iwch_write_pbl(mhp, pages, i, n);
if (err)
return ERR_PTR(err);
}
- shift = ffs(mhp->umem->page_size) - 1;
+ shift = mhp->umem->page_shift;
n = mhp->umem->nmap;
err = alloc_pbl(mhp, n);
len = sg_dma_len(sg) >> shift;
for (k = 0; k < len; ++k) {
pages[i++] = cpu_to_be64(sg_dma_address(sg) +
- mhp->umem->page_size * k);
+ (k << shift));
if (i == PAGE_SIZE / sizeof *pages) {
err = write_pbl(&mhp->rhp->rdev,
pages,
return PTR_ERR(*umem);
ret = hns_roce_mtt_init(hr_dev, ib_umem_page_count(*umem),
- ilog2((unsigned int)(*umem)->page_size),
- &buf->hr_mtt);
+ (*umem)->page_shift, &buf->hr_mtt);
if (ret)
goto err_buf;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
len = sg_dma_len(sg) >> mtt->page_shift;
for (k = 0; k < len; ++k) {
- pages[i++] = sg_dma_address(sg) + umem->page_size * k;
+ pages[i++] = sg_dma_address(sg) +
+ (k << umem->page_shift);
if (i == PAGE_SIZE / sizeof(u64)) {
ret = hns_roce_write_mtt(hr_dev, mtt, n, i,
pages);
}
n = ib_umem_page_count(mr->umem);
- if (mr->umem->page_size != HNS_ROCE_HEM_PAGE_SIZE) {
- dev_err(dev, "Just support 4K page size but is 0x%x now!\n",
- mr->umem->page_size);
+ if (mr->umem->page_shift != HNS_ROCE_HEM_PAGE_SHIFT) {
+ dev_err(dev, "Just support 4K page size but is 0x%lx now!\n",
+ BIT(mr->umem->page_shift));
ret = -EINVAL;
goto err_umem;
}
}
ret = hns_roce_mtt_init(hr_dev, ib_umem_page_count(hr_qp->umem),
- ilog2((unsigned int)hr_qp->umem->page_size),
- &hr_qp->mtt);
+ hr_qp->umem->page_shift, &hr_qp->mtt);
if (ret) {
dev_err(dev, "hns_roce_mtt_init error for create qp\n");
goto err_buf;
{
struct ib_umem *region = iwmr->region;
struct i40iw_pbl *iwpbl = &iwmr->iwpbl;
- int chunk_pages, entry, pg_shift, i;
+ int chunk_pages, entry, i;
struct i40iw_pble_alloc *palloc = &iwpbl->pble_alloc;
struct i40iw_pble_info *pinfo;
struct scatterlist *sg;
pinfo = (level == I40IW_LEVEL_1) ? NULL : palloc->level2.leaf;
- pg_shift = ffs(region->page_size) - 1;
for_each_sg(region->sg_head.sgl, sg, region->nmap, entry) {
- chunk_pages = sg_dma_len(sg) >> pg_shift;
+ chunk_pages = sg_dma_len(sg) >> region->page_shift;
if ((iwmr->type == IW_MEMREG_TYPE_QP) &&
!iwpbl->qp_mr.sq_page)
iwpbl->qp_mr.sq_page = sg_page(sg);
for (i = 0; i < chunk_pages; i++) {
- pg_addr = sg_dma_address(sg) + region->page_size * i;
+ pg_addr = sg_dma_address(sg) +
+ (i << region->page_shift);
if ((entry + i) == 0)
*pbl = cpu_to_le64(pg_addr & iwmr->page_msk);
iwmr->ibmr.device = pd->device;
ucontext = to_ucontext(pd->uobject->context);
- iwmr->page_size = region->page_size;
+ iwmr->page_size = PAGE_SIZE;
iwmr->page_msk = PAGE_MASK;
if (region->hugetlb && (req.reg_type == IW_MEMREG_TYPE_MEM))
return PTR_ERR(*umem);
err = mlx4_mtt_init(dev->dev, ib_umem_page_count(*umem),
- ilog2((*umem)->page_size), &buf->mtt);
+ (*umem)->page_shift, &buf->mtt);
if (err)
goto err_buf;
len = sg_dma_len(sg) >> mtt->page_shift;
for (k = 0; k < len; ++k) {
pages[i++] = sg_dma_address(sg) +
- umem->page_size * k;
+ (k << umem->page_shift);
/*
* Be friendly to mlx4_write_mtt() and
* pass it chunks of appropriate size.
}
n = ib_umem_page_count(mr->umem);
- shift = ilog2(mr->umem->page_size);
+ shift = mr->umem->page_shift;
err = mlx4_mr_alloc(dev->dev, to_mpd(pd)->pdn, virt_addr, length,
convert_access(access_flags), n, shift, &mr->mmr);
goto release_mpt_entry;
}
n = ib_umem_page_count(mmr->umem);
- shift = ilog2(mmr->umem->page_size);
+ shift = mmr->umem->page_shift;
err = mlx4_mr_rereg_mem_write(dev->dev, &mmr->mmr,
virt_addr, length, n, shift,
}
err = mlx4_mtt_init(dev->dev, ib_umem_page_count(qp->umem),
- ilog2(qp->umem->page_size), &qp->mtt);
+ qp->umem->page_shift, &qp->mtt);
if (err)
goto err_buf;
}
err = mlx4_mtt_init(dev->dev, ib_umem_page_count(srq->umem),
- ilog2(srq->umem->page_size), &srq->mtt);
+ srq->umem->page_shift, &srq->mtt);
if (err)
goto err_buf;
u64 pfn;
struct scatterlist *sg;
int entry;
- unsigned long page_shift = ilog2(umem->page_size);
+ unsigned long page_shift = umem->page_shift;
/* With ODP we must always match OS page size. */
if (umem->odp_data) {
int page_shift, size_t offset, size_t num_pages,
__be64 *pas, int access_flags)
{
- unsigned long umem_page_shift = ilog2(umem->page_size);
+ unsigned long umem_page_shift = umem->page_shift;
int shift = page_shift - umem_page_shift;
int mask = (1 << shift) - 1;
int i, k, idx;
* but they will write 0s as well, so no difference in the end result.
*/
- for (addr = start; addr < end; addr += (u64)umem->page_size) {
+ for (addr = start; addr < end; addr += BIT(umem->page_shift)) {
idx = (addr - ib_umem_start(umem)) / PAGE_SIZE;
/*
* Strive to write the MTTs in chunks, but avoid overwriting
goto err;
}
- shift = ffs(mr->umem->page_size) - 1;
+ shift = mr->umem->page_shift;
n = mr->umem->nmap;
mr->mtt = mthca_alloc_mtt(dev, n);
for_each_sg(mr->umem->sg_head.sgl, sg, mr->umem->nmap, entry) {
len = sg_dma_len(sg) >> shift;
for (k = 0; k < len; ++k) {
- pages[i++] = sg_dma_address(sg) +
- mr->umem->page_size * k;
+ pages[i++] = sg_dma_address(sg) + (k << shift);
/*
* Be friendly to write_mtt and pass it chunks
* of appropriate size.
}
nes_debug(NES_DBG_MR, "User base = 0x%lX, Virt base = 0x%lX, length = %u,"
- " offset = %u, page size = %u.\n",
+ " offset = %u, page size = %lu.\n",
(unsigned long int)start, (unsigned long int)virt, (u32)length,
- ib_umem_offset(region), region->page_size);
+ ib_umem_offset(region), BIT(region->page_shift));
skip_pages = ((u32)ib_umem_offset(region)) >> 12;
pbe = (struct ocrdma_pbe *)pbl_tbl->va;
pbe_cnt = 0;
- shift = ilog2(umem->page_size);
+ shift = umem->page_shift;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
pages = sg_dma_len(sg) >> shift;
for (pg_cnt = 0; pg_cnt < pages; pg_cnt++) {
/* store the page address in pbe */
pbe->pa_lo =
- cpu_to_le32(sg_dma_address
- (sg) +
- (umem->page_size * pg_cnt));
+ cpu_to_le32(sg_dma_address(sg) +
+ (pg_cnt << shift));
pbe->pa_hi =
- cpu_to_le32(upper_32_bits
- ((sg_dma_address
- (sg) +
- umem->page_size * pg_cnt)));
+ cpu_to_le32(upper_32_bits(sg_dma_address(sg) +
+ (pg_cnt << shift)));
pbe_cnt += 1;
total_num_pbes += 1;
pbe++;
if (status)
goto umem_err;
- mr->hwmr.pbe_size = mr->umem->page_size;
+ mr->hwmr.pbe_size = BIT(mr->umem->page_shift);
mr->hwmr.fbo = ib_umem_offset(mr->umem);
mr->hwmr.va = usr_addr;
mr->hwmr.len = len;
pbe_cnt = 0;
- shift = ilog2(umem->page_size);
+ shift = umem->page_shift;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
pages = sg_dma_len(sg) >> shift;
for (pg_cnt = 0; pg_cnt < pages; pg_cnt++) {
/* store the page address in pbe */
pbe->lo = cpu_to_le32(sg_dma_address(sg) +
- umem->page_size * pg_cnt);
+ (pg_cnt << shift));
addr = upper_32_bits(sg_dma_address(sg) +
- umem->page_size * pg_cnt);
+ (pg_cnt << shift));
pbe->hi = cpu_to_le32(addr);
pbe_cnt++;
total_num_pbes++;
mr->hw_mr.pbl_ptr = mr->info.pbl_table[0].pa;
mr->hw_mr.pbl_two_level = mr->info.pbl_info.two_layered;
mr->hw_mr.pbl_page_size_log = ilog2(mr->info.pbl_info.pbl_size);
- mr->hw_mr.page_size_log = ilog2(mr->umem->page_size);
+ mr->hw_mr.page_size_log = mr->umem->page_shift;
mr->hw_mr.fbo = ib_umem_offset(mr->umem);
mr->hw_mr.length = len;
mr->hw_mr.vaddr = usr_addr;
len = sg_dma_len(sg) >> PAGE_SHIFT;
for (j = 0; j < len; j++) {
dma_addr_t addr = sg_dma_address(sg) +
- umem->page_size * j;
+ (j << umem->page_shift);
ret = pvrdma_page_dir_insert_dma(pdir, i, addr);
if (ret)
mr->mr.access_flags = mr_access_flags;
mr->umem = umem;
- if (is_power_of_2(umem->page_size))
- mr->mr.page_shift = ilog2(umem->page_size);
+ mr->mr.page_shift = umem->page_shift;
m = 0;
n = 0;
for_each_sg(umem->sg_head.sgl, sg, umem->nmap, entry) {
goto bail_inval;
}
mr->mr.map[m]->segs[n].vaddr = vaddr;
- mr->mr.map[m]->segs[n].length = umem->page_size;
- trace_rvt_mr_user_seg(&mr->mr, m, n, vaddr, umem->page_size);
+ mr->mr.map[m]->segs[n].length = BIT(umem->page_shift);
+ trace_rvt_mr_user_seg(&mr->mr, m, n, vaddr,
+ BIT(umem->page_shift));
n++;
if (n == RVT_SEGSZ) {
m++;
goto err1;
}
- WARN_ON_ONCE(!is_power_of_2(umem->page_size));
-
- mem->page_shift = ilog2(umem->page_size);
- mem->page_mask = umem->page_size - 1;
+ mem->page_shift = umem->page_shift;
+ mem->page_mask = BIT(umem->page_shift) - 1;
num_buf = 0;
map = mem->map;
}
buf->addr = (uintptr_t)vaddr;
- buf->size = umem->page_size;
+ buf->size = BIT(umem->page_shift);
num_buf++;
buf++;
struct ib_ucontext *context;
size_t length;
unsigned long address;
- int page_size;
+ int page_shift;
int writable;
int hugetlb;
struct work_struct work;
/* Returns the offset of the umem start relative to the first page. */
static inline int ib_umem_offset(struct ib_umem *umem)
{
- return umem->address & ((unsigned long)umem->page_size - 1);
+ return umem->address & (BIT(umem->page_shift) - 1);
}
/* Returns the first page of an ODP umem. */
projects / users / willy / pagecache.git / commitdiff