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The "Message Routing" is in the section 2.2.8, and the "INTx Mechanism Messages" is in the section 2.2.8.1 on the PCI Express Base Specification, Rev 6.1. Signed-off-by: Yoshihiro Shimoda Reviewed-by: Serge Semin Reviewed-by: Manivannan Sadhasivam Acked-by: Bjorn Helgaas Signed-off-by: Frank Li --- drivers/pci/pci.h | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index 2336a8d1edab2..fe42f5d10b010 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -22,6 +22,24 @@ */ #define PCIE_PME_TO_L2_TIMEOUT_US 10000 +/* Message Routing (r[2:0]) */ +#define PCI_MSG_TYPE_R_RC 0 +#define PCI_MSG_TYPE_R_ADDR 1 +#define PCI_MSG_TYPE_R_ID 2 +#define PCI_MSG_TYPE_R_BC 3 +#define PCI_MSG_TYPE_R_LOCAL 4 +#define PCI_MSG_TYPE_R_GATHER 5 + +/* INTx Mechanism Messages */ +#define PCI_MSG_CODE_ASSERT_INTA 0x20 +#define PCI_MSG_CODE_ASSERT_INTB 0x21 +#define PCI_MSG_CODE_ASSERT_INTC 0x22 +#define PCI_MSG_CODE_ASSERT_INTD 0x23 +#define PCI_MSG_CODE_DEASSERT_INTA 0x24 +#define PCI_MSG_CODE_DEASSERT_INTB 0x25 +#define PCI_MSG_CODE_DEASSERT_INTC 0x26 +#define PCI_MSG_CODE_DEASSERT_INTD 0x27 + extern const unsigned char pcie_link_speed[]; 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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?q?aH89jKRaRcDrzwTof0dMeHjY83ib?= =?utf-8?q?rpuXnQMxveX+Hr8Qjs6/E1rt1BW0EG2tLkamsdmFMfVSNFXREHUzZ+qi0QUaGoSQv?= =?utf-8?q?wH3mHYM0U2gkSOjYlWcw7NmqxQzZqFaYy+3sDTed5Zm2pff+SMneTJYvsVDGejeYQ?= =?utf-8?q?xOS6Y0kHQHHscH3Jwp2oLdl/oq58ggOSMNAd1mTrlXP7VM1/kCnOzV9HtSb1AqQux?= =?utf-8?q?bmw8TbZ2UEUfJYuWlTygac18oS1Xrutc7Vjzv86DLHfPqmTRu3DPQSqgU2JWINL1L?= =?utf-8?q?xPeGhcjTsxX2fAQlUMAa11wAqmR14mPWkzIS5nf7r6wQVPdpbosy1YfTnBEdt50+N?= =?utf-8?q?VCVtJ44+KAMFflofu6/A8E/HB8KwQq4fWlP2k0awwIMolGvlDdE4jB24hcUVkL8do?= =?utf-8?q?IyRVspHyYvfalo/1cg4mGhvCSa6LwuvAumLZwWewW1H/myb9dOO3zYUge7sv8wZx+?= =?utf-8?q?pvycH5IsN7mxJdExMv7/aM+JmrvJml2D22KAaSM1JXZtm3ONDVupMTtHMz9QZ2nKN?= =?utf-8?q?OEelSX6jqLnCu3R0kgR2/z7nAtQkIY4pKztT9qsQ6ujWDo6E5/Kl84csZVp21C4cz?= =?utf-8?q?BUk6/GPvRkbw8oa5xD8ejpy5Y4rz/lGUFzHkC/qC3Ss2JmrwrRmKvsB+4Mfymv48w?= =?utf-8?q?Fojeq1lscImfo4qO5KQ/oJNRGw+SQLA0B8BwPVA4llqFt57uCTYTRQ3OMNnLaWt0r?= =?utf-8?q?4v+3LryowxhNwN5tY3EpVuc8VngW3bQgxYpAoF9FTnHhWg5QW3ZDh3Ywm8teqidaN?= =?utf-8?q?29YxR/pVU++6dSFTJhc28dNs0WakZtVbStNC9b1tN9TYrRZFCViW+O6aOdrKV01RZ?= =?utf-8?q?Ig2t6ssIp3/8yVe7h+ICNJec5bhwVO04jZywDkBCYGOUOQ4XkVbAPdN8gKM2xoDg/?= =?utf-8?q?ImmD9PDCP35xDmLwF6YNxPLI6jsVYyV1KiTe1JZZUl+W/kQjt1n9tVH+q9IZ77b/H?= =?utf-8?q?66HgKKquVDRjZDC0LaDYvprfBbNJ53GGR2V6aPf571vzhL7NqjTZa5zNdaiSM5Udb?= =?utf-8?q?hjrKvsKOIuZS8hCRywbaDXfS0seveg4mBvVZQpuGnZXGjcbrI8H0PNTbDMrjvYNVu?= =?utf-8?q?eCkOUbzcKJnL6htCnVpWciUx1kcbZaV6BbFRsDLsVXjluQGeOjGIj9mV91wpMUYWF?= =?utf-8?q?lyyHWT1qVyII4FcC99Hhrud/OeRrb6V1cX40aKRD2gYXAunvY7VmrtZZ9Hh63h4l0?= =?utf-8?q?BQ+OsqUvU7UYKrkHfUoAyEBXJ21oExm/ZnueMn5HDTKSZLDGVNPffmoaeU3LvM7IP?= =?utf-8?q?eUC2Ka+N5gXcssC5sDeaMzGgU+zdLSyhiSgPzgPszSZafbsrIEmb2vvL0oRZmDhCG?= =?utf-8?q?YYgDGhNe5cbQYF07quTMxSQQTt+5MERFoyGXRyTYYnOLw5vvgGXvXF8VtD5zpKbXO?= =?utf-8?q?ANL607KVyqf5upR8/UweXTj5QtAmuKuoMJ+cK2KQVoOhCEUQGHMeKVS4ClXu/wNU6?= =?utf-8?q?i+agbEx8ZNWUN4MuOEqxbKUne6A6qjWDMlSK7Vmlu7KC/2TKlT4pXCXQ=3D?= X-OriginatorOrg: nxp.com X-MS-Exchange-CrossTenant-Network-Message-Id: 2add2321-01cf-4040-8690-08dc2340c7fe X-MS-Exchange-CrossTenant-AuthSource: PAXPR04MB9642.eurprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 01 Feb 2024 16:13:52.0804 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: bI4IkCQyImCsA1kVk5u8IuAtJcCFOnhSfzZuahBc1D6+RdaT1yWgNLyKyyGN3sXna/3A5Yg8RGyfEHdoGuna9Q== X-MS-Exchange-Transport-CrossTenantHeadersStamped: AS8PR04MB9110 From: Yoshihiro Shimoda This is a preparation before adding the Msg-type outbound iATU mapping. The respective update will require two more arguments added to __dw_pcie_prog_outbound_atu(). That will make the already complicated function prototype even more hard to comprehend accepting _eight_ arguments. In order to prevent that and keep the code more-or-less readable all the outbound iATU-related arguments are moved to the new config-structure: struct dw_pcie_ob_atu_cfg pointer to which shall be passed to dw_pcie_prog_outbound_atu(). The structure is supposed to be locally defined and populated with the outbound iATU settings implied by the caller context. As a result of the denoted change there is no longer need in having the two distinctive methods for the Host and End-point outbound iATU setups since the corresponding code can directly call the dw_pcie_prog_outbound_atu() method with the config-structure populated. Thus dw_pcie_prog_ep_outbound_atu() is dropped. Signed-off-by: Yoshihiro Shimoda Reviewed-by: Serge Semin Reviewed-by: Manivannan Sadhasivam Signed-off-by: Frank Li --- drivers/pci/controller/dwc/pcie-designware-ep.c | 21 +++++---- drivers/pci/controller/dwc/pcie-designware-host.c | 52 ++++++++++++++++------- drivers/pci/controller/dwc/pcie-designware.c | 49 ++++++++------------- drivers/pci/controller/dwc/pcie-designware.h | 15 +++++-- 4 files changed, 77 insertions(+), 60 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-ep.c b/drivers/pci/controller/dwc/pcie-designware-ep.c index 5befed2dc02b7..27956b2a73be7 100644 --- a/drivers/pci/controller/dwc/pcie-designware-ep.c +++ b/drivers/pci/controller/dwc/pcie-designware-ep.c @@ -159,9 +159,8 @@ static int dw_pcie_ep_inbound_atu(struct dw_pcie_ep *ep, u8 func_no, int type, return 0; } -static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, u8 func_no, - phys_addr_t phys_addr, - u64 pci_addr, size_t size) +static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, + struct dw_pcie_ob_atu_cfg *atu) { struct dw_pcie *pci = to_dw_pcie_from_ep(ep); u32 free_win; @@ -173,13 +172,13 @@ static int dw_pcie_ep_outbound_atu(struct dw_pcie_ep *ep, u8 func_no, return -EINVAL; } - ret = dw_pcie_prog_ep_outbound_atu(pci, func_no, free_win, PCIE_ATU_TYPE_MEM, - phys_addr, pci_addr, size); + atu->index = free_win; + ret = dw_pcie_prog_outbound_atu(pci, atu); if (ret) return ret; set_bit(free_win, ep->ob_window_map); - ep->outbound_addr[free_win] = phys_addr; + ep->outbound_addr[free_win] = atu->cpu_addr; return 0; } @@ -279,8 +278,14 @@ static int dw_pcie_ep_map_addr(struct pci_epc *epc, u8 func_no, u8 vfunc_no, int ret; struct dw_pcie_ep *ep = epc_get_drvdata(epc); struct dw_pcie *pci = to_dw_pcie_from_ep(ep); - - ret = dw_pcie_ep_outbound_atu(ep, func_no, addr, pci_addr, size); + struct dw_pcie_ob_atu_cfg atu = { 0 }; + + atu.func_no = func_no; + atu.type = PCIE_ATU_TYPE_MEM; + atu.cpu_addr = addr; + atu.pci_addr = pci_addr; + atu.size = size; + ret = dw_pcie_ep_outbound_atu(ep, &atu); if (ret) { dev_err(pci->dev, "Failed to enable address\n"); return ret; diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index d5fc31f8345f7..267687ab33cbc 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -549,6 +549,7 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, { struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct dw_pcie_ob_atu_cfg atu = { 0 }; int type, ret; u32 busdev; @@ -571,8 +572,12 @@ static void __iomem *dw_pcie_other_conf_map_bus(struct pci_bus *bus, else type = PCIE_ATU_TYPE_CFG1; - ret = dw_pcie_prog_outbound_atu(pci, 0, type, pp->cfg0_base, busdev, - pp->cfg0_size); + atu.type = type; + atu.cpu_addr = pp->cfg0_base; + atu.pci_addr = busdev; + atu.size = pp->cfg0_size; + + ret = dw_pcie_prog_outbound_atu(pci, &atu); if (ret) return NULL; @@ -584,6 +589,7 @@ static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn, { struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct dw_pcie_ob_atu_cfg atu = { 0 }; int ret; ret = pci_generic_config_read(bus, devfn, where, size, val); @@ -591,9 +597,12 @@ static int dw_pcie_rd_other_conf(struct pci_bus *bus, unsigned int devfn, return ret; if (pp->cfg0_io_shared) { - ret = dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, - pp->io_base, pp->io_bus_addr, - pp->io_size); + atu.type = PCIE_ATU_TYPE_IO; + atu.cpu_addr = pp->io_base; + atu.pci_addr = pp->io_bus_addr; + atu.size = pp->io_size; + + ret = dw_pcie_prog_outbound_atu(pci, &atu); if (ret) return PCIBIOS_SET_FAILED; } @@ -606,6 +615,7 @@ static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn, { struct dw_pcie_rp *pp = bus->sysdata; struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct dw_pcie_ob_atu_cfg atu = { 0 }; int ret; ret = pci_generic_config_write(bus, devfn, where, size, val); @@ -613,9 +623,12 @@ static int dw_pcie_wr_other_conf(struct pci_bus *bus, unsigned int devfn, return ret; if (pp->cfg0_io_shared) { - ret = dw_pcie_prog_outbound_atu(pci, 0, PCIE_ATU_TYPE_IO, - pp->io_base, pp->io_bus_addr, - pp->io_size); + atu.type = PCIE_ATU_TYPE_IO; + atu.cpu_addr = pp->io_base; + atu.pci_addr = pp->io_bus_addr; + atu.size = pp->io_size; + + ret = dw_pcie_prog_outbound_atu(pci, &atu); if (ret) return PCIBIOS_SET_FAILED; } @@ -650,6 +663,7 @@ static struct pci_ops dw_pcie_ops = { static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) { struct dw_pcie *pci = to_dw_pcie_from_pp(pp); + struct dw_pcie_ob_atu_cfg atu = { 0 }; struct resource_entry *entry; int i, ret; @@ -677,10 +691,13 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) if (pci->num_ob_windows <= ++i) break; - ret = dw_pcie_prog_outbound_atu(pci, i, PCIE_ATU_TYPE_MEM, - entry->res->start, - entry->res->start - entry->offset, - resource_size(entry->res)); + atu.index = i; + atu.type = PCIE_ATU_TYPE_MEM; + atu.cpu_addr = entry->res->start; + atu.pci_addr = entry->res->start - entry->offset; + atu.size = resource_size(entry->res); + + ret = dw_pcie_prog_outbound_atu(pci, &atu); if (ret) { dev_err(pci->dev, "Failed to set MEM range %pr\n", entry->res); @@ -690,10 +707,13 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) if (pp->io_size) { if (pci->num_ob_windows > ++i) { - ret = dw_pcie_prog_outbound_atu(pci, i, PCIE_ATU_TYPE_IO, - pp->io_base, - pp->io_bus_addr, - pp->io_size); + atu.index = i; + atu.type = PCIE_ATU_TYPE_IO; + atu.cpu_addr = pp->io_base; + atu.pci_addr = pp->io_bus_addr; + atu.size = pp->io_size; + + ret = dw_pcie_prog_outbound_atu(pci, &atu); if (ret) { dev_err(pci->dev, "Failed to set IO range %pr\n", entry->res); diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index 250cf7f40b858..df2575ec5f44c 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -465,56 +465,56 @@ static inline u32 dw_pcie_enable_ecrc(u32 val) return val | PCIE_ATU_TD; } -static int __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, - int index, int type, u64 cpu_addr, - u64 pci_addr, u64 size) +int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, + const struct dw_pcie_ob_atu_cfg *atu) { + u64 cpu_addr = atu->cpu_addr; u32 retries, val; u64 limit_addr; if (pci->ops && pci->ops->cpu_addr_fixup) cpu_addr = pci->ops->cpu_addr_fixup(pci, cpu_addr); - limit_addr = cpu_addr + size - 1; + limit_addr = cpu_addr + atu->size - 1; if ((limit_addr & ~pci->region_limit) != (cpu_addr & ~pci->region_limit) || !IS_ALIGNED(cpu_addr, pci->region_align) || - !IS_ALIGNED(pci_addr, pci->region_align) || !size) { + !IS_ALIGNED(atu->pci_addr, pci->region_align) || !atu->size) { return -EINVAL; } - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LOWER_BASE, + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_LOWER_BASE, lower_32_bits(cpu_addr)); - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_BASE, + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_BASE, upper_32_bits(cpu_addr)); - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LIMIT, + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_LIMIT, lower_32_bits(limit_addr)); if (dw_pcie_ver_is_ge(pci, 460A)) - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_LIMIT, + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_LIMIT, upper_32_bits(limit_addr)); - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_LOWER_TARGET, - lower_32_bits(pci_addr)); - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_UPPER_TARGET, - upper_32_bits(pci_addr)); + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_LOWER_TARGET, + lower_32_bits(atu->pci_addr)); + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_TARGET, + upper_32_bits(atu->pci_addr)); - val = type | PCIE_ATU_FUNC_NUM(func_no); + val = atu->type | PCIE_ATU_FUNC_NUM(atu->func_no); if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) && dw_pcie_ver_is_ge(pci, 460A)) val |= PCIE_ATU_INCREASE_REGION_SIZE; if (dw_pcie_ver_is(pci, 490A)) val = dw_pcie_enable_ecrc(val); - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_REGION_CTRL1, val); + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL1, val); - dw_pcie_writel_atu_ob(pci, index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE); + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE); /* * Make sure ATU enable takes effect before any subsequent config * and I/O accesses. */ for (retries = 0; retries < LINK_WAIT_MAX_IATU_RETRIES; retries++) { - val = dw_pcie_readl_atu_ob(pci, index, PCIE_ATU_REGION_CTRL2); + val = dw_pcie_readl_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2); if (val & PCIE_ATU_ENABLE) return 0; @@ -526,21 +526,6 @@ static int __dw_pcie_prog_outbound_atu(struct dw_pcie *pci, u8 func_no, return -ETIMEDOUT; } -int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type, - u64 cpu_addr, u64 pci_addr, u64 size) -{ - return __dw_pcie_prog_outbound_atu(pci, 0, index, type, - cpu_addr, pci_addr, size); -} - -int dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int type, u64 cpu_addr, u64 pci_addr, - u64 size) -{ - return __dw_pcie_prog_outbound_atu(pci, func_no, index, type, - cpu_addr, pci_addr, size); -} - static inline u32 dw_pcie_readl_atu_ib(struct dw_pcie *pci, u32 index, u32 reg) { return dw_pcie_readl_atu(pci, PCIE_ATU_REGION_DIR_IB, index, reg); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 26dae48374627..d21db82e586d5 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -299,6 +299,15 @@ enum dw_pcie_ltssm { DW_PCIE_LTSSM_UNKNOWN = 0xFFFFFFFF, }; +struct dw_pcie_ob_atu_cfg { + int index; + int type; + u8 func_no; + u64 cpu_addr; + u64 pci_addr; + u64 size; +}; + struct dw_pcie_host_ops { int (*init)(struct dw_pcie_rp *pp); void (*deinit)(struct dw_pcie_rp *pp); @@ -434,10 +443,8 @@ void dw_pcie_write_dbi2(struct dw_pcie *pci, u32 reg, size_t size, u32 val); int dw_pcie_link_up(struct dw_pcie *pci); void dw_pcie_upconfig_setup(struct dw_pcie *pci); int dw_pcie_wait_for_link(struct dw_pcie *pci); -int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, int index, int type, - u64 cpu_addr, u64 pci_addr, u64 size); -int dw_pcie_prog_ep_outbound_atu(struct dw_pcie *pci, u8 func_no, int index, - int type, u64 cpu_addr, u64 pci_addr, u64 size); +int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, + const struct dw_pcie_ob_atu_cfg *atu); int dw_pcie_prog_inbound_atu(struct dw_pcie *pci, int index, int type, u64 cpu_addr, u64 pci_addr, u64 size); int dw_pcie_prog_ep_inbound_atu(struct dw_pcie *pci, u8 func_no, int index, From patchwork Thu Feb 1 16:13:27 2024 Content-Type: text/plain; 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PCIE_ATU_INHIBIT_PAYLOAD is set to issue TLP type of Msg instead of MsgD. So, this implementation supports the data-less messages only for now. Signed-off-by: Yoshihiro Shimoda Reviewed-by: Serge Semin Reviewed-by: Manivannan Sadhasivam Signed-off-by: Frank Li --- drivers/pci/controller/dwc/pcie-designware.c | 9 +++++++-- drivers/pci/controller/dwc/pcie-designware.h | 4 ++++ 2 files changed, 11 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index df2575ec5f44c..ba909fade9db1 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -499,7 +499,7 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_UPPER_TARGET, upper_32_bits(atu->pci_addr)); - val = atu->type | PCIE_ATU_FUNC_NUM(atu->func_no); + val = atu->type | atu->routing | PCIE_ATU_FUNC_NUM(atu->func_no); if (upper_32_bits(limit_addr) > upper_32_bits(cpu_addr) && dw_pcie_ver_is_ge(pci, 460A)) val |= PCIE_ATU_INCREASE_REGION_SIZE; @@ -507,7 +507,12 @@ int dw_pcie_prog_outbound_atu(struct dw_pcie *pci, val = dw_pcie_enable_ecrc(val); dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL1, val); - dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, PCIE_ATU_ENABLE); + val = PCIE_ATU_ENABLE; + if (atu->type == PCIE_ATU_TYPE_MSG) { + /* The data-less messages only for now */ + val |= PCIE_ATU_INHIBIT_PAYLOAD | atu->code; + } + dw_pcie_writel_atu_ob(pci, atu->index, PCIE_ATU_REGION_CTRL2, val); /* * Make sure ATU enable takes effect before any subsequent config diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index d21db82e586d5..703b50bc5e0f1 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -148,11 +148,13 @@ #define PCIE_ATU_TYPE_IO 0x2 #define PCIE_ATU_TYPE_CFG0 0x4 #define PCIE_ATU_TYPE_CFG1 0x5 +#define PCIE_ATU_TYPE_MSG 0x10 #define PCIE_ATU_TD BIT(8) #define PCIE_ATU_FUNC_NUM(pf) ((pf) << 20) #define PCIE_ATU_REGION_CTRL2 0x004 #define PCIE_ATU_ENABLE BIT(31) #define PCIE_ATU_BAR_MODE_ENABLE BIT(30) +#define PCIE_ATU_INHIBIT_PAYLOAD BIT(22) #define PCIE_ATU_FUNC_NUM_MATCH_EN BIT(19) #define PCIE_ATU_LOWER_BASE 0x008 #define PCIE_ATU_UPPER_BASE 0x00C @@ -303,6 +305,8 @@ struct dw_pcie_ob_atu_cfg { int index; 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Thu, 1 Feb 2024 16:13:59 +0000 From: Frank Li Date: Thu, 01 Feb 2024 11:13:28 -0500 Subject: [PATCH v2 4/6] PCI: Add PME_TURN_OFF message macro Message-Id: <20240201-pme_msg-v2-4-6767052fe6a4@nxp.com> References: <20240201-pme_msg-v2-0-6767052fe6a4@nxp.com> In-Reply-To: <20240201-pme_msg-v2-0-6767052fe6a4@nxp.com> To: Bjorn Helgaas , Jingoo Han , Gustavo Pimentel , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , imx@lists.linux.dev Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, Frank Li X-Mailer: b4 0.13-dev-c87ef X-Developer-Signature: v=1; a=ed25519-sha256; t=1706804020; l=581; i=Frank.Li@nxp.com; s=20240130; h=from:subject:message-id; bh=D3OVyPoQgbl9xXSYR/1BiTXAJm+k9I1uFEMvcHMr1z8=; b=Z/MykaJG4lN7Eiy498ABqEaB5K84jhUBMRuzNHiZIQonpO8C+NfdT7mGWSyLdCdXZ/K0/12S8 wHVy0K+btKfCFkUfiSO2NUHSAPSbJ0ZcfPhorZYcRN7PR6NVVJuUPNt X-Developer-Key: i=Frank.Li@nxp.com; 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Signed-off-by: Frank Li --- drivers/pci/pci.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h index fe42f5d10b010..46bbd815efccf 100644 --- a/drivers/pci/pci.h +++ b/drivers/pci/pci.h @@ -40,6 +40,8 @@ #define PCI_MSG_CODE_DEASSERT_INTC 0x26 #define PCI_MSG_CODE_DEASSERT_INTD 0x27 +#define PCI_MSG_CODE_PME_TURN_OFF 0x19 + extern const unsigned char pcie_link_speed[]; extern bool pci_early_dump; From patchwork Thu Feb 1 16:13:29 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Frank Li X-Patchwork-Id: 13541355 Received: from EUR03-DBA-obe.outbound.protection.outlook.com (mail-dbaeur03on2089.outbound.protection.outlook.com [40.107.104.89]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 4623A163A8D; Thu, 1 Feb 2024 16:14:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; 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So all platforms can use common method to send out PME_Turn_Off message by using one outbound iATU. Signed-off-by: Frank Li --- Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml index 022055edbf9e6..25a5420a9ce1e 100644 --- a/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml +++ b/Documentation/devicetree/bindings/pci/snps,dw-pcie.yaml @@ -101,6 +101,10 @@ properties: Outbound iATU-capable memory-region which will be used to access the peripheral PCIe devices configuration space. const: config + - description: + Outbound iATU-capable memory-region which will be used to send + PCIe message (such as PME_Turn_Off) to peripheral. + const: msg - description: Vendor-specific CSR names. Consider using the generic names above for new bindings. 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So one MMIO write can trigger a PCI message, such as PME_Turn_Off. Add common dw_pcie_send_pme_turn_off_by_atu() function. Call dw_pcie_send_pme_turn_off_by_atu() to send out PME_Turn_Off message in general dw_pcie_suspend_noirq() if there are not platform callback pme_turn_off() exist. Signed-off-by: Frank Li --- drivers/pci/controller/dwc/pcie-designware-host.c | 51 +++++++++++++++++++++-- drivers/pci/controller/dwc/pcie-designware.c | 8 ++++ drivers/pci/controller/dwc/pcie-designware.h | 3 ++ 3 files changed, 58 insertions(+), 4 deletions(-) diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c index 267687ab33cbc..2a281060f3aad 100644 --- a/drivers/pci/controller/dwc/pcie-designware-host.c +++ b/drivers/pci/controller/dwc/pcie-designware-host.c @@ -728,6 +728,8 @@ static int dw_pcie_iatu_setup(struct dw_pcie_rp *pp) dev_warn(pci->dev, "Ranges exceed outbound iATU size (%d)\n", pci->num_ob_windows); + pci->msg_atu_index = i; + i = 0; resource_list_for_each_entry(entry, &pp->bridge->dma_ranges) { if (resource_type(entry->res) != IORESOURCE_MEM) @@ -833,11 +835,49 @@ int dw_pcie_setup_rc(struct dw_pcie_rp *pp) } EXPORT_SYMBOL_GPL(dw_pcie_setup_rc); +static int dw_pcie_send_pme_turn_off_by_atu(struct dw_pcie *pci) +{ + struct dw_pcie_ob_atu_cfg atu = { 0 }; + void __iomem *m; + int ret = 0; + + if (pci->num_ob_windows <= pci->msg_atu_index) + return -EINVAL; + + atu.code = PCI_MSG_CODE_PME_TURN_OFF; + atu.routing = PCI_MSG_TYPE_R_BC; + atu.type = PCIE_ATU_TYPE_MSG; + atu.size = pci->msg_io_size; + + if (!atu.size) { + dev_dbg(pci->dev, + "atu memory map windows is zero, please check 'msg' reg in dts\n"); + return -ENOMEM; + } + + atu.cpu_addr = pci->msg_io_base; + + ret = dw_pcie_prog_outbound_atu(pci, &atu); + if (ret) + return ret; + + m = ioremap(atu.cpu_addr, PAGE_SIZE); + if (!m) + return -ENOMEM; + + /* A dummy write is converted to a Msg TLP */ + writel(0, m); + + iounmap(m); + + return ret; +} + int dw_pcie_suspend_noirq(struct dw_pcie *pci) { u8 offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); u32 val; - int ret; + int ret = 0; /* * If L1SS is supported, then do not put the link into L2 as some @@ -849,10 +889,13 @@ int dw_pcie_suspend_noirq(struct dw_pcie *pci) if (dw_pcie_get_ltssm(pci) <= DW_PCIE_LTSSM_DETECT_ACT) return 0; - if (!pci->pp.ops->pme_turn_off) - return 0; + if (pci->pp.ops->pme_turn_off) + pci->pp.ops->pme_turn_off(&pci->pp); + else + ret = dw_pcie_send_pme_turn_off_by_atu(pci); - pci->pp.ops->pme_turn_off(&pci->pp); + if (ret) + return ret; ret = read_poll_timeout(dw_pcie_get_ltssm, val, val == DW_PCIE_LTSSM_L2_IDLE, PCIE_PME_TO_L2_TIMEOUT_US/10, diff --git a/drivers/pci/controller/dwc/pcie-designware.c b/drivers/pci/controller/dwc/pcie-designware.c index ba909fade9db1..eb24362009bb6 100644 --- a/drivers/pci/controller/dwc/pcie-designware.c +++ b/drivers/pci/controller/dwc/pcie-designware.c @@ -155,6 +155,14 @@ int dw_pcie_get_resources(struct dw_pcie *pci) } } + if (!pci->msg_io_base) { + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "msg"); + if (res) { + pci->msg_io_base = res->start; + pci->msg_io_size = res->end - res->start + 1; + } + } + /* LLDD is supposed to manually switch the clocks and resets state */ if (dw_pcie_cap_is(pci, REQ_RES)) { ret = dw_pcie_get_clocks(pci); diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h index 703b50bc5e0f1..866ab44df9fd1 100644 --- a/drivers/pci/controller/dwc/pcie-designware.h +++ b/drivers/pci/controller/dwc/pcie-designware.h @@ -424,6 +424,9 @@ struct dw_pcie { struct reset_control_bulk_data core_rsts[DW_PCIE_NUM_CORE_RSTS]; struct gpio_desc *pe_rst; bool suspended; + int msg_atu_index; + phys_addr_t msg_io_base; + size_t msg_io_size; }; #define to_dw_pcie_from_pp(port) container_of((port), struct dw_pcie, pp)