Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 706a1a8c authored by Pratham Pratap's avatar Pratham Pratap
Browse files

usb: dwc3-msm: Support > 32-bit DMA addresses for GSI 



Fix a few places where only the lower 32-bits of DMA addresses
are being passed to GSI. This includes the ring base address,
GSI doorbell address, and TRBs. Also do the same for DBM
endpoints' link TRB.

Change-Id: I33f7c05f60070ff45d3bedb66f9976491d584186
Signed-off-by: default avatarJack Pham <jackp@codeaurora.org>
Signed-off-by: default avatarPratham Pratap <prathampratap@codeaurora.org>
parent b01489e0

drivers/usb/dwc3/dwc3-msm.c

+44 −37
Original line number Diff line number Diff line
@@ -703,7 +703,7 @@ static int __dwc3_msm_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 
	memset(trb_link, 0, sizeof(*trb_link));



	trb_link->bpl = lower_32_bits(req->trb_dma);

	trb_link->bph = DBM_TRB_BIT |

	trb_link->bph = upper_32_bits(req->trb_dma) | DBM_TRB_BIT |

			DBM_TRB_DMA | DBM_TRB_EP_NUM(dep->number);

	trb_link->size = 0;

	trb_link->ctrl = DWC3_TRBCTL_LINK_TRB | DWC3_TRB_CTRL_HWO;
@@ -712,7 +712,7 @@ static int __dwc3_msm_ep_queue(struct dwc3_ep *dep, struct dwc3_request *req) 
	 * Now start the transfer

	 */

	memset(&params, 0, sizeof(params));

	params.param0 = 0; /* TDAddr High */

	params.param0 = upper_32_bits(req->trb_dma); /* TDAddr High */

	params.param1 = lower_32_bits(req->trb_dma); /* DAddr Low */



	/* DBM requires IOC to be set */
@@ -961,6 +961,8 @@ static int gsi_startxfer_for_ep(struct usb_ep *ep) 


	memset(&params, 0, sizeof(params));

	params.param0 = GSI_TRB_ADDR_BIT_53_MASK | GSI_TRB_ADDR_BIT_55_MASK;

	params.param0 |= upper_32_bits(dwc3_trb_dma_offset(dep,

						&dep->trb_pool[0]) & 0xffff);

	params.param0 |= (ep->ep_intr_num << 16);

	params.param1 = lower_32_bits(dwc3_trb_dma_offset(dep,

						&dep->trb_pool[0]));
@@ -991,7 +993,13 @@ static void gsi_store_ringbase_dbl_info(struct usb_ep *ep, 
	int n = ep->ep_intr_num - 1;



	dwc3_msm_write_reg(mdwc->base, GSI_RING_BASE_ADDR_L(mdwc->gsi_reg, n),

		dwc3_trb_dma_offset(dep, &dep->trb_pool[0]));

		lower_32_bits(dwc3_trb_dma_offset(dep, &dep->trb_pool[0])));

	dwc3_msm_write_reg(mdwc->base, GSI_RING_BASE_ADDR_H(mdwc->gsi_reg, n),

		upper_32_bits(dwc3_trb_dma_offset(dep, &dep->trb_pool[0])));



	dev_dbg(mdwc->dev, "Ring Base Addr %d: %x (LSB) %x (MSB)\n", n,

		lower_32_bits(dwc3_trb_dma_offset(dep, &dep->trb_pool[0])),

		upper_32_bits(dwc3_trb_dma_offset(dep, &dep->trb_pool[0])));



	if (!request->mapped_db_reg_phs_addr_lsb) {

		request->mapped_db_reg_phs_addr_lsb =
@@ -1015,17 +1023,14 @@ static void gsi_store_ringbase_dbl_info(struct usb_ep *ep, 
	 * Replace dummy doorbell address with real one as IPA connection

	 * is setup now and GSI must be ready to handle doorbell updates.

	 */

	dwc3_msm_write_reg_field(mdwc->base, GSI_DBL_ADDR_H(mdwc->gsi_reg, n),

			~0x0, 0x0);

	dwc3_msm_write_reg(mdwc->base, GSI_DBL_ADDR_H(mdwc->gsi_reg, n),

		upper_32_bits(request->mapped_db_reg_phs_addr_lsb));



	dwc3_msm_write_reg(mdwc->base, GSI_DBL_ADDR_L(mdwc->gsi_reg, n),

		(u32)request->mapped_db_reg_phs_addr_lsb);

	dev_dbg(mdwc->dev, "Ring Base Addr %d: %x (LSB)\n", n,

		dwc3_msm_read_reg(mdwc->base,

			GSI_RING_BASE_ADDR_L(mdwc->gsi_reg, n)));

	dev_dbg(mdwc->dev, "GSI DB Addr %d: %x (LSB)\n", n,

		dwc3_msm_read_reg(mdwc->base,

			GSI_DBL_ADDR_L(mdwc->gsi_reg, n)));

		lower_32_bits(request->mapped_db_reg_phs_addr_lsb));



	dev_dbg(mdwc->dev, "GSI DB Addr %d: %pa\n", n,

		&request->mapped_db_reg_phs_addr_lsb);

}



/**
@@ -1039,7 +1044,7 @@ static void gsi_ring_db(struct usb_ep *ep, struct usb_gsi_request *request) 
{

	void __iomem *gsi_dbl_address_lsb;

	void __iomem *gsi_dbl_address_msb;

	dma_addr_t offset;

	dma_addr_t trb_dma;

	struct dwc3_ep *dep = to_dwc3_ep(ep);

	struct dwc3	*dwc = dep->dwc;

	struct dwc3_msm *mdwc = dev_get_drvdata(dwc->dev->parent);
@@ -1063,17 +1068,14 @@ static void gsi_ring_db(struct usb_ep *ep, struct usb_gsi_request *request) 
		return;

	}



	offset = dwc3_trb_dma_offset(dep, &dep->trb_pool[num_trbs-1]);

	trb_dma = dwc3_trb_dma_offset(dep, &dep->trb_pool[num_trbs-1]);

	dev_dbg(mdwc->dev, "Writing link TRB addr: %pa to %pK (%x) for ep:%s\n",

		&offset, gsi_dbl_address_lsb, request->db_reg_phs_addr_lsb,

		&trb_dma, gsi_dbl_address_lsb, request->db_reg_phs_addr_lsb,

		ep->name);



	dbg_log_string("ep:%s link TRB addr:%pa db:%x\n",

		ep->name, &offset, request->db_reg_phs_addr_lsb);



	writel_relaxed(offset, gsi_dbl_address_lsb);

	writel_relaxed(lower_32_bits(trb_dma), gsi_dbl_address_lsb);

	readl_relaxed(gsi_dbl_address_lsb);

	writel_relaxed(0, gsi_dbl_address_msb);

	writel_relaxed(upper_32_bits(trb_dma), gsi_dbl_address_msb);

	readl_relaxed(gsi_dbl_address_msb);



	iounmap(gsi_dbl_address_lsb);
@@ -1141,6 +1143,7 @@ static int gsi_prepare_trbs(struct usb_ep *ep, struct usb_gsi_request *req) 
	size_t len;

	unsigned long dma_attr;

	dma_addr_t buffer_addr;

	dma_addr_t trb0_dma;

	struct dwc3_ep *dep = to_dwc3_ep(ep);

	struct dwc3		*dwc = dep->dwc;

	struct dwc3_msm *mdwc = dev_get_drvdata(dwc->dev->parent);
@@ -1183,6 +1186,8 @@ static int gsi_prepare_trbs(struct usb_ep *ep, struct usb_gsi_request *req) 
		goto free_trb_buffer;

	}



	trb0_dma = dwc3_trb_dma_offset(dep, &dep->trb_pool[0]);



	dep->num_trbs = num_trbs;

	dma_get_sgtable(dwc->sysdev, &req->sgt_trb_xfer_ring, dep->trb_pool,

		dep->trb_pool_dma, num_trbs * sizeof(struct dwc3_trb));
@@ -1214,7 +1219,7 @@ static int gsi_prepare_trbs(struct usb_ep *ep, struct usb_gsi_request *req) 


			/* Setup n TRBs pointing to valid buffers */

			trb->bpl = lower_32_bits(buffer_addr);

			trb->bph = 0;

			trb->bph = upper_32_bits(buffer_addr);

			trb->size = 0;

			trb->ctrl = DWC3_TRBCTL_NORMAL

					| DWC3_TRB_CTRL_IOC;
@@ -1222,9 +1227,9 @@ static int gsi_prepare_trbs(struct usb_ep *ep, struct usb_gsi_request *req) 


			/* Set up the Link TRB at the end */

			if (i == (num_trbs - 1)) {

				trb->bpl = dwc3_trb_dma_offset(dep,

							&dep->trb_pool[0]);

				trb->bph = (1 << 23) | (1 << 21)

				trb->bpl = lower_32_bits(trb0_dma);

				trb->bph = upper_32_bits(trb0_dma & 0xffff);

				trb->bph |= (1 << 23) | (1 << 21)

						| (ep->ep_intr_num << 16);

				trb->size = 0;

				trb->ctrl = DWC3_TRBCTL_LINK_TRB
@@ -1239,19 +1244,22 @@ static int gsi_prepare_trbs(struct usb_ep *ep, struct usb_gsi_request *req) 
			memset(trb, 0, sizeof(*trb));

			/* Setup LINK TRB to start with TRB ring */

			if (i == 0) {

				trb->bpl = dwc3_trb_dma_offset(dep,

							&dep->trb_pool[1]);

				trb->bpl =

					lower_32_bits(trb0_dma + sizeof(*trb));

				trb->bph =

					upper_32_bits(trb0_dma + sizeof(*trb));

				trb->ctrl = DWC3_TRBCTL_LINK_TRB;

			} else if (i == (num_trbs - 1)) {

				/* Set up the Link TRB at the end */

				trb->bpl = dwc3_trb_dma_offset(dep,

						&dep->trb_pool[0]);

				trb->bph = (1 << 23) | (1 << 21)

				trb->bpl = lower_32_bits(trb0_dma);

				trb->bph = upper_32_bits(trb0_dma & 0xffff);

				trb->bph |= (1 << 23) | (1 << 21)

						| (ep->ep_intr_num << 16);

				trb->ctrl = DWC3_TRBCTL_LINK_TRB

						| DWC3_TRB_CTRL_HWO;

			} else {

				trb->bpl = lower_32_bits(buffer_addr);

				trb->bph = upper_32_bits(buffer_addr);

				trb->size = req->buf_len;

				buffer_addr += req->buf_len;

				trb->ctrl = DWC3_TRBCTL_NORMAL
@@ -1342,14 +1350,12 @@ static void gsi_configure_ep(struct usb_ep *ep, struct usb_gsi_request *request) 
	int ret;



	/* setup dummy doorbell as IPA connection isn't setup yet */

	dwc3_msm_write_reg_field(mdwc->base, GSI_DBL_ADDR_H(mdwc->gsi_reg, n),

			~0x0, (u32)((u64)mdwc->dummy_gsi_db_dma >> 32));



	dwc3_msm_write_reg_field(mdwc->base, GSI_DBL_ADDR_L(mdwc->gsi_reg, n),

			~0x0, (u32)mdwc->dummy_gsi_db_dma);

	dev_dbg(mdwc->dev, "Dummy DB Addr %pK: %llx %llx (LSB)\n",

		&mdwc->dummy_gsi_db, mdwc->dummy_gsi_db_dma,

		(u32)mdwc->dummy_gsi_db_dma);

	dwc3_msm_write_reg(mdwc->base, GSI_DBL_ADDR_H(mdwc->gsi_reg, n),

			upper_32_bits(mdwc->dummy_gsi_db_dma));

	dwc3_msm_write_reg(mdwc->base, GSI_DBL_ADDR_L(mdwc->gsi_reg, n),

			lower_32_bits(mdwc->dummy_gsi_db_dma));

	dev_dbg(mdwc->dev, "Dummy DB Addr %pK: %llx\n",

		&mdwc->dummy_gsi_db, mdwc->dummy_gsi_db_dma);



	memset(&params, 0x00, sizeof(params));
@@ -2092,6 +2098,7 @@ static void dwc3_msm_notify_event(struct dwc3 *dwc, unsigned int event, 
			dwc3_writel(dwc->regs, DWC3_GEVNTADRLO((i+1)),

				lower_32_bits(evt->dma));

			dwc3_writel(dwc->regs, DWC3_GEVNTADRHI((i+1)),

				(upper_32_bits(evt->dma) & 0xffff) |

				DWC3_GEVNTADRHI_EVNTADRHI_GSI_EN(

				DWC3_GEVENT_TYPE_GSI) |

				DWC3_GEVNTADRHI_EVNTADRHI_GSI_IDX((i+1)));