| Message ID | 20230717065535.2065582-1-quic_srichara@quicinc.com |
|---|---|
| State | New |
| Headers | show |
| Series | [V4] PCI: qcom: Fixing broken pcie bring up for 2_3_3 configs ops | expand |
On 7/17/2023 7:09 PM, Greg KH wrote: > On Mon, Jul 17, 2023 at 12:25:35PM +0530, Sricharan Ramabadhran wrote: >> PARF_SLV_ADDR_SPACE_SIZE_2_3_3 macro is used for IPQ8074 >> 2_3_3 post_init ops. PCIe slave addr size was initially set >> to 0x358, but was wrongly changed to 0x168 as a part of >> commit 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from >> register definitions"). Fixing it, by using the right macro >> PARF_SLV_ADDR_SPACE_SIZE and remove the unused >> PARF_SLV_ADDR_SPACE_SIZE_2_3_3. > > Note, you do have a full 72 columns to use, no need to make it smaller. ok sure > >> Without this pcie bring up on IPQ8074 is broken now. > > I do not understand, something that used to work now breaks, or this is > preventing a new chip from being "brought up"? > yes, ipq8074 pcie which was previously working is broken now. This patch fixes it. Regards, Sricharan
On Mon, 17 Jul 2023 at 20:16, Sricharan Ramabadhran <quic_srichara@quicinc.com> wrote: > > > > On 7/17/2023 7:09 PM, Greg KH wrote: > > On Mon, Jul 17, 2023 at 12:25:35PM +0530, Sricharan Ramabadhran wrote: > >> PARF_SLV_ADDR_SPACE_SIZE_2_3_3 macro is used for IPQ8074 > >> 2_3_3 post_init ops. PCIe slave addr size was initially set > >> to 0x358, but was wrongly changed to 0x168 as a part of > >> commit 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from > >> register definitions"). Fixing it, by using the right macro > >> PARF_SLV_ADDR_SPACE_SIZE and remove the unused > >> PARF_SLV_ADDR_SPACE_SIZE_2_3_3. > > > > Note, you do have a full 72 columns to use, no need to make it smaller. > > ok sure > > > > >> Without this pcie bring up on IPQ8074 is broken now. > > > > I do not understand, something that used to work now breaks, or this is > > preventing a new chip from being "brought up"? > > > > yes, ipq8074 pcie which was previously working is broken now. > This patch fixes it. So, you need to describe what is broken and why. Mere "it is broken, fix it" is not enough. > > > Regards, > Sricharan
On 7/17/2023 11:23 PM, Dmitry Baryshkov wrote: > On Mon, 17 Jul 2023 at 20:16, Sricharan Ramabadhran > <quic_srichara@quicinc.com> wrote: >> >> >> >> On 7/17/2023 7:09 PM, Greg KH wrote: >>> On Mon, Jul 17, 2023 at 12:25:35PM +0530, Sricharan Ramabadhran wrote: >>>> PARF_SLV_ADDR_SPACE_SIZE_2_3_3 macro is used for IPQ8074 >>>> 2_3_3 post_init ops. PCIe slave addr size was initially set >>>> to 0x358, but was wrongly changed to 0x168 as a part of >>>> commit 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from >>>> register definitions"). Fixing it, by using the right macro >>>> PARF_SLV_ADDR_SPACE_SIZE and remove the unused >>>> PARF_SLV_ADDR_SPACE_SIZE_2_3_3. >>> >>> Note, you do have a full 72 columns to use, no need to make it smaller. >> >> ok sure >> >>> >>>> Without this pcie bring up on IPQ8074 is broken now. >>> >>> I do not understand, something that used to work now breaks, or this is >>> preventing a new chip from being "brought up"? >>> >> >> yes, ipq8074 pcie which was previously working is broken now. >> This patch fixes it. > > So, you need to describe what is broken and why. Mere "it is broken, > fix it" is not enough. ok sure, will change the subject and explicitly state in commit log how pcie enumeration is broken up. Regards, Sricharan
diff --git a/drivers/pci/controller/dwc/pcie-qcom.c b/drivers/pci/controller/dwc/pcie-qcom.c index 4ab30892f6ef..8418894b3de7 100644 --- a/drivers/pci/controller/dwc/pcie-qcom.c +++ b/drivers/pci/controller/dwc/pcie-qcom.c @@ -43,7 +43,6 @@ #define PARF_PHY_REFCLK 0x4c #define PARF_CONFIG_BITS 0x50 #define PARF_DBI_BASE_ADDR 0x168 -#define PARF_SLV_ADDR_SPACE_SIZE_2_3_3 0x16c /* Register offset specific to IP ver 2.3.3 */ #define PARF_MHI_CLOCK_RESET_CTRL 0x174 #define PARF_AXI_MSTR_WR_ADDR_HALT 0x178 #define PARF_AXI_MSTR_WR_ADDR_HALT_V2 0x1a8 @@ -810,8 +809,7 @@ static int qcom_pcie_post_init_2_3_3(struct qcom_pcie *pcie) u16 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); u32 val; - writel(SLV_ADDR_SPACE_SZ, - pcie->parf + PARF_SLV_ADDR_SPACE_SIZE_2_3_3); + writel(SLV_ADDR_SPACE_SZ, pcie->parf + PARF_SLV_ADDR_SPACE_SIZE); val = readl(pcie->parf + PARF_PHY_CTRL); val &= ~PHY_TEST_PWR_DOWN;
PARF_SLV_ADDR_SPACE_SIZE_2_3_3 macro is used for IPQ8074 2_3_3 post_init ops. PCIe slave addr size was initially set to 0x358, but was wrongly changed to 0x168 as a part of commit 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from register definitions"). Fixing it, by using the right macro PARF_SLV_ADDR_SPACE_SIZE and remove the unused PARF_SLV_ADDR_SPACE_SIZE_2_3_3. Without this pcie bring up on IPQ8074 is broken now. Fixes: 39171b33f652 ("PCI: qcom: Remove PCIE20_ prefix from register definitions") Cc: <Stable@vger.kernel.org> Reviewed-by: Manivannan Sadhasivam <mani@kernel.org> Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org> Signed-off-by: Sricharan Ramabadhran <quic_srichara@quicinc.com> --- [v4] Fix commit sub and added '<mani@kernel.org>' reviewed-by tag [v3] Added reviewed-by tag, fixed subject, commit text [v2] Fixed the 'fixes tag' correctly, subject, right macro usage drivers/pci/controller/dwc/pcie-qcom.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-)