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dmaengine: idxd: Update calculation of group offset to be more readable 

Create helper macros to make group offset calculation more readable.

Signed-off-by: Dave Jiang <dave.jiang@intel.com>
Link: https://lore.kernel.org/r/160407294683.839093.10740868559754142070.stgit@djiang5-desk3.ch.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Dave Jiang 2020-10-30 08:49:06 -07:00 committed by Vinod Koul
parent 4749f51ddd
commit 5a71270197
2 changed files with 23 additions and 7 deletions
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12
drivers/dma/idxd/device.c
View File

@ -543,24 +543,22 @@ static void idxd_group_config_write(struct idxd_group *group)
dev_dbg(dev, "Writing group %d cfg registers\n", group->id);
/* setup GRPWQCFG */
for (i = 0; i < 4; i++) {
grpcfg_offset = idxd->grpcfg_offset +
group->id * 64 + i * sizeof(u64);
iowrite64(group->grpcfg.wqs[i],
idxd->reg_base + grpcfg_offset);
for (i = 0; i < GRPWQCFG_STRIDES; i++) {
grpcfg_offset = GRPWQCFG_OFFSET(idxd, group->id, i);
iowrite64(group->grpcfg.wqs[i], idxd->reg_base + grpcfg_offset);
dev_dbg(dev, "GRPCFG wq[%d:%d: %#x]: %#llx\n",
group->id, i, grpcfg_offset,
ioread64(idxd->reg_base + grpcfg_offset));
}
/* setup GRPENGCFG */
grpcfg_offset = idxd->grpcfg_offset + group->id * 64 + 32;
grpcfg_offset = GRPENGCFG_OFFSET(idxd, group->id);
iowrite64(group->grpcfg.engines, idxd->reg_base + grpcfg_offset);
dev_dbg(dev, "GRPCFG engs[%d: %#x]: %#llx\n", group->id,
grpcfg_offset, ioread64(idxd->reg_base + grpcfg_offset));
/* setup GRPFLAGS */
grpcfg_offset = idxd->grpcfg_offset + group->id * 64 + 40;
grpcfg_offset = GRPFLGCFG_OFFSET(idxd, group->id);
iowrite32(group->grpcfg.flags.bits, idxd->reg_base + grpcfg_offset);
dev_dbg(dev, "GRPFLAGS flags[%d: %#x]: %#x\n",
group->id, grpcfg_offset,

18
drivers/dma/idxd/registers.h
View File

@ -356,4 +356,22 @@ union wqcfg {
#define WQCFG_STRIDES(_idxd_dev) ((_idxd_dev)->wqcfg_size / sizeof(u32))
#define GRPCFG_SIZE 64
#define GRPWQCFG_STRIDES 4
/*
* This macro calculates the offset into the GRPCFG register
* idxd - struct idxd *
* n - wq id
* ofs - the index of the 32b dword for the config register
*
* The WQCFG register block is divided into groups per each wq. The n index
* allows us to move to the register group that's for that particular wq.
* Each register is 32bits. The ofs gives us the number of register to access.
*/
#define GRPWQCFG_OFFSET(idxd_dev, n, ofs) ((idxd_dev)->grpcfg_offset +\
(n) * GRPCFG_SIZE + sizeof(u64) * (ofs))
#define GRPENGCFG_OFFSET(idxd_dev, n) ((idxd_dev)->grpcfg_offset + (n) * GRPCFG_SIZE + 32)
#define GRPFLGCFG_OFFSET(idxd_dev, n) ((idxd_dev)->grpcfg_offset + (n) * GRPCFG_SIZE + 40)
#endif