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Commit 40ba0aea authored by Prudhvi Yarlagadda's avatar Prudhvi Yarlagadda
Browse files

slim-msm-ngd: Add support for slimbus to use LPASS memory 



Add support for slimbus to use LPASS memory instead of DDR
memory for bam transfers.

Change-Id: I74d4e16d0c982ceacb5190872b7f945beeae29cf
Signed-off-by: default avatarPrudhvi Yarlagadda <pyarlaga@codeaurora.org>
parent 786601f4

drivers/slimbus/slim-msm-ngd.c

+45 −16
Original line number Diff line number Diff line
@@ -170,6 +170,10 @@ static int ngd_slim_qmi_new_server(struct qmi_handle *hdl, 
	qmi->svc_info.sq_family = AF_QIPCRTR;

	qmi->svc_info.sq_node = service->node;

	qmi->svc_info.sq_port = service->port;

	if (dev->lpass_mem_usage) {

		dev->lpass_mem->start = dev->lpass_phy_base;

		dev->lpass.base = dev->lpass_virt_base;

	}

	atomic_set(&dev->ssr_in_progress, 0);

	schedule_work(&dev->dsp.dom_up);
@@ -692,8 +696,12 @@ static int ngd_xfer_msg(struct slim_controller *ctrl, struct slim_msg_txn *txn) 
		*(puc++) = (txn->ec & 0xFF);

		*(puc++) = (txn->ec >> 8)&0xFF;

	}

	if (txn->wbuf)

	if (txn->wbuf) {

		if (dev->lpass_mem_usage)

			memcpy_toio(puc, txn->wbuf, txn->len);

		else

			memcpy(puc, txn->wbuf, txn->len);

	}

	if (txn->mt == SLIM_MSG_MT_DEST_REFERRED_USER &&

		(txn->mc == SLIM_USR_MC_CONNECT_SRC ||

		 txn->mc == SLIM_USR_MC_CONNECT_SINK ||
@@ -1750,6 +1758,7 @@ static int ngd_slim_probe(struct platform_device *pdev) 
	int ret;

	struct resource		*bam_mem;

	struct resource		*slim_mem;

	struct resource		*lpass_mem;

	struct resource		*irq, *bam_irq;

	bool			rxreg_access = false;

	bool			slim_mdm = false;
@@ -1790,6 +1799,16 @@ static int ngd_slim_probe(struct platform_device *pdev) 
		dev_err(&pdev->dev, "no memory for MSM slimbus controller\n");

		return PTR_ERR(dev);

	}



	dev->lpass_mem_usage = false;

	lpass_mem = platform_get_resource_byname(pdev, IORESOURCE_MEM,

						"slimbus_lpass_mem");

	if (lpass_mem) {

		dev_dbg(&pdev->dev, "Slimbus lpass memory is used\n");

		dev->lpass_mem_usage = true;

		dev->lpass_phy_base = (unsigned long long)lpass_mem->start;

	}



	dev->wr_comp = kzalloc(sizeof(struct completion *) * MSM_TX_BUFS,

				GFP_KERNEL);

	if (!dev->wr_comp) {
@@ -1849,26 +1868,40 @@ static int ngd_slim_probe(struct platform_device *pdev) 
	} else

		dev->sysfs_created = true;



	dev->base = ioremap(slim_mem->start, resource_size(slim_mem));

	dev->base = devm_ioremap(&pdev->dev, slim_mem->start,

					resource_size(slim_mem));

	if (!dev->base) {

		dev_err(&pdev->dev, "IOremap failed\n");

		ret = -ENOMEM;

		goto err_ioremap_failed;

	}

	dev->bam.base = ioremap(bam_mem->start, resource_size(bam_mem));

	dev->bam.base = devm_ioremap(&pdev->dev, bam_mem->start,

					resource_size(bam_mem));

	if (!dev->bam.base) {

		dev_err(&pdev->dev, "BAM IOremap failed\n");

		ret = -ENOMEM;

		goto err_ioremap_bam_failed;

		goto err_ioremap_failed;

	}



	if (lpass_mem) {

		dev->lpass.base = devm_ioremap(&pdev->dev, lpass_mem->start,

					resource_size(lpass_mem));

		if (!dev->lpass.base) {

			dev_err(&pdev->dev, "LPASS IOremap failed\n");

			ret = -ENOMEM;

			goto err_ioremap_failed;

		}

		dev->lpass_virt_base = dev->lpass.base;

	}



	if (pdev->dev.of_node) {



		ret = of_property_read_u32(pdev->dev.of_node, "cell-index",

					&dev->ctrl.nr);

		if (ret) {

			dev_err(&pdev->dev, "Cell index not specified:%d\n",

								ret);

			goto err_ctrl_failed;

			dev_err(&pdev->dev,

					"Cell index not specified:%d\n", ret);

			goto err_ioremap_failed;

		}

		rxreg_access = of_property_read_bool(pdev->dev.of_node,

					"qcom,rxreg-access");
@@ -1889,7 +1922,7 @@ static int ngd_slim_probe(struct platform_device *pdev) 
		if (ret) {

			dev_err(dev->dev, "%s: Failed to of_platform_populate %d\n",

				__func__, ret);

			goto err_ctrl_failed;

			goto err_ioremap_failed;

		}

	} else {

		dev->ctrl.nr = pdev->id;
@@ -1918,6 +1951,7 @@ static int ngd_slim_probe(struct platform_device *pdev) 
	dev->ctrl.port_xfer = msm_slim_port_xfer;

	dev->ctrl.port_xfer_status = msm_slim_port_xfer_status;

	dev->bam_mem = bam_mem;

	dev->lpass_mem = lpass_mem;

	dev->rx_slim = ngd_slim_rx;



	init_completion(&dev->reconf);
@@ -1946,7 +1980,7 @@ static int ngd_slim_probe(struct platform_device *pdev) 
	ret = slim_add_numbered_controller(&dev->ctrl);

	if (ret) {

		dev_err(dev->dev, "error adding controller\n");

		goto err_ctrl_failed;

		goto err_ioremap_failed;

	}



	dev->ctrl.dev.parent = &pdev->dev;
@@ -1968,7 +2002,7 @@ static int ngd_slim_probe(struct platform_device *pdev) 


	if (ret) {

		dev_err(&pdev->dev, "request IRQ failed\n");

		goto err_request_irq_failed;

		goto err_ioremap_failed;

	}



	init_completion(&dev->qmi.qmi_comp);
@@ -2015,11 +2049,6 @@ static int ngd_slim_probe(struct platform_device *pdev) 
	kthread_stop(dev->rx_msgq_thread);

err_rx_thread_create_failed:

	free_irq(dev->irq, dev);

err_request_irq_failed:

err_ctrl_failed:

	iounmap(dev->bam.base);

err_ioremap_bam_failed:

	iounmap(dev->base);

err_ioremap_failed:

	if (dev->sysfs_created)

		sysfs_remove_file(&dev->dev->kobj,

drivers/slimbus/slim-msm.c

+19 −8
Original line number Diff line number Diff line
@@ -170,26 +170,37 @@ int msm_slim_sps_mem_alloc( 


	mem->size = len;

	mem->min_size = 0;

	mem->base = dma_alloc_coherent(dma_dev, mem->size, &phys, GFP_KERNEL);

	mem->base = dev->lpass_mem_usage ? dev->lpass.base :

		dma_alloc_coherent(dma_dev, mem->size, &phys, GFP_KERNEL);



	if (!mem->base) {

		dev_err(dma_dev, "dma_alloc_coherent (%d) failed\n", len);

		return -ENOMEM;

	}



	mem->phys_base = phys;

	mem->phys_base = dev->lpass_mem_usage ?

			(unsigned long long)dev->lpass_mem->start : phys;

	if (dev->lpass_mem_usage) {

		memset_io(mem->base, 0x00, mem->size);

		dev->lpass.base = dev->lpass.base + mem->size;

		dev->lpass_mem->start = dev->lpass_mem->start + mem->size;

	} else {

		memset(mem->base, 0x00, mem->size);

	}

	return 0;

}



void

msm_slim_sps_mem_free(struct msm_slim_ctrl *dev, struct sps_mem_buffer *mem)

{

	if (!dev->lpass_mem_usage) {

		if (mem->base && mem->phys_base)

			dma_free_coherent(dev->dev, mem->size, mem->base,

							mem->phys_base);

		else

		dev_err(dev->dev, "cant dma free. they are NULL\n");

			dev_err(dev->dev, "Cannot free DMA as it is NULL\n");

	}



	mem->size = 0;

	mem->base = NULL;

	mem->phys_base = 0;

drivers/slimbus/slim-msm.h

+6 −0
Original line number Diff line number Diff line
@@ -257,6 +257,7 @@ struct msm_slim_bulk_wr { 


struct msm_slim_iommu {

	struct device			*cb_dev;

	struct dma_iommu_mapping	*iommu_map;

	bool				s1_bypass;

};
@@ -266,6 +267,11 @@ struct msm_slim_ctrl { 
	struct device		*dev;

	struct msm_slim_iommu	iommu_desc;

	void __iomem		*base;

	struct msm_slim_sps_bam	lpass;

	struct resource		*lpass_mem;

	u32			lpass_phy_base;

	void __iomem		*lpass_virt_base;

	bool			lpass_mem_usage;

	struct resource		*slew_mem;

	struct resource		*bam_mem;

	u32			curr_bw;