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Commit e6a0d89d authored by Rama Krishna Phani A's avatar Rama Krishna Phani A
Browse files

msm: mhi_dev: update NHWER after M0 from host 



Host might update NHWER value before issuing M0 to device.
So, update number of HW event rings after M0 is received from host.

Change-Id: I2e0b28a82e299e66b0167977c4c4ed9d7b6c889e
Signed-off-by: default avatarRama Krishna Phani A <rphani@codeaurora.org>
parent 39da7462

drivers/platform/msm/mhi_dev/mhi.c

+4 −0
Original line number Diff line number Diff line
@@ -2364,6 +2364,10 @@ static int mhi_dev_cache_host_cfg(struct mhi_dev *mhi) 
		return rc;

	}



	mhi_log(MHI_MSG_VERBOSE,

		"Number of Event rings : %d, HW Event rings : %d\n",

			mhi->cfg.event_rings, mhi->cfg.hw_event_rings);



	mhi->cmd_ctx_shadow.size = sizeof(struct mhi_dev_cmd_ctx);

	mhi->ev_ctx_shadow.size = sizeof(struct mhi_dev_ev_ctx) *

					mhi->cfg.event_rings;

drivers/platform/msm/mhi_dev/mhi_mmio.c

+11 −3
Original line number Diff line number Diff line
@@ -709,13 +709,21 @@ EXPORT_SYMBOL(mhi_dev_mmio_init); 


int mhi_dev_update_ner(struct mhi_dev *dev)

{

	int rc = 0, mhi_cfg = 0;



	if (WARN_ON(!dev))

		return -EINVAL;



	mhi_dev_mmio_masked_read(dev, MHICFG, MHICFG_NER_MASK,

				  MHICFG_NER_SHIFT, &dev->cfg.event_rings);

	rc = mhi_dev_mmio_read(dev, MHICFG, &mhi_cfg);

	if (rc)

		return rc;



	pr_debug("MHICFG: 0x%x", mhi_cfg);



	pr_debug("NER in HW :%d\n", dev->cfg.event_rings);

	dev->cfg.event_rings =

		(mhi_cfg & MHICFG_NER_MASK) >> MHICFG_NER_SHIFT;

	dev->cfg.hw_event_rings =

		(mhi_cfg & MHICFG_NHWER_MASK) >> MHICFG_NHWER_SHIFT;



	return 0;

}