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Merge branch 'remotes/lorenzo/pci/endpoint'
- Add a .release() callback for the Endpoint Controller library so an Endpoint driver is removable (Yoshihiro Shimoda) - Fix pci-epf-vntb kernel-doc and whitespace (Frank Li) - Fix pci-epf-vntb error path usage of pci_epc_mem_free_addr() (Frank Li) - Remove pci-epf-vntb unused epf_db_phy (Frank Li) - Fix pci-epf-vntb sparse warnings (Frank Li) * remotes/lorenzo/pci/endpoint: PCI: endpoint: pci-epf-vntb: Fix sparse ntb->reg build warning PCI: endpoint: pci-epf-vntb: Fix sparse build warning for epf_db PCI: endpoint: pci-epf-vntb: Replace hardcoded 4 with sizeof(u32) PCI: endpoint: pci-epf-vntb: Remove unused epf_db_phy struct member PCI: endpoint: pci-epf-vntb: Fix call pci_epc_mem_free_addr() in error path PCI: endpoint: pci-epf-vntb: Fix struct epf_ntb_ctrl indentation PCI: endpoint: pci-epf-vntb: Clean up kernel_doc warning PCI: endpoint: Fix WARN() when an endpoint driver is removed
This commit is contained in:
Bjorn Helgaas
commit
c00a109054
@ -11,7 +11,7 @@
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* Author: Kishon Vijay Abraham I <kishon@ti.com>
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*/
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/**
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/*
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* +------------+ +---------------------------------------+
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* | | | |
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* +------------+ | +--------------+
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@ -99,20 +99,20 @@ enum epf_ntb_bar {
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* NTB Driver NTB Driver
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*/
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struct epf_ntb_ctrl {
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u32 command;
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u32 argument;
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u16 command_status;
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u16 link_status;
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u32 topology;
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u64 addr;
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u64 size;
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u32 num_mws;
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u32 reserved;
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u32 spad_offset;
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u32 spad_count;
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u32 db_entry_size;
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u32 db_data[MAX_DB_COUNT];
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u32 db_offset[MAX_DB_COUNT];
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u32 command;
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u32 argument;
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u16 command_status;
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u16 link_status;
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u32 topology;
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u64 addr;
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u64 size;
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u32 num_mws;
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u32 reserved;
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u32 spad_offset;
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u32 spad_count;
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u32 db_entry_size;
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u32 db_data[MAX_DB_COUNT];
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u32 db_offset[MAX_DB_COUNT];
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} __packed;
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struct epf_ntb {
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@ -136,8 +136,7 @@ struct epf_ntb {
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struct epf_ntb_ctrl *reg;
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phys_addr_t epf_db_phy;
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void __iomem *epf_db;
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u32 *epf_db;
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phys_addr_t vpci_mw_phy[MAX_MW];
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void __iomem *vpci_mw_addr[MAX_MW];
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@ -156,12 +155,14 @@ static struct pci_epf_header epf_ntb_header = {
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};
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/**
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* epf_ntb_link_up() - Raise link_up interrupt to Virtual Host
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* epf_ntb_link_up() - Raise link_up interrupt to Virtual Host (VHOST)
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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* @link_up: true or false indicating Link is UP or Down
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*
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* Once NTB function in HOST invoke ntb_link_enable(),
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* this NTB function driver will trigger a link event to vhost.
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* this NTB function driver will trigger a link event to VHOST.
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*
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* Returns: Zero for success, or an error code in case of failure
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*/
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static int epf_ntb_link_up(struct epf_ntb *ntb, bool link_up)
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{
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@ -175,9 +176,9 @@ static int epf_ntb_link_up(struct epf_ntb *ntb, bool link_up)
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}
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/**
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* epf_ntb_configure_mw() - Configure the Outbound Address Space for vhost
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* to access the memory window of host
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* @ntb: NTB device that facilitates communication between host and vhost
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* epf_ntb_configure_mw() - Configure the Outbound Address Space for VHOST
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* to access the memory window of HOST
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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* @mw: Index of the memory window (either 0, 1, 2 or 3)
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*
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* EP Outbound Window
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@ -194,7 +195,9 @@ static int epf_ntb_link_up(struct epf_ntb *ntb, bool link_up)
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* | | | |
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* | | | |
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* +--------+ +-----------+
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* VHost PCI EP
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* VHOST PCI EP
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*
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* Returns: Zero for success, or an error code in case of failure
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*/
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static int epf_ntb_configure_mw(struct epf_ntb *ntb, u32 mw)
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{
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@ -219,7 +222,7 @@ static int epf_ntb_configure_mw(struct epf_ntb *ntb, u32 mw)
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/**
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* epf_ntb_teardown_mw() - Teardown the configured OB ATU
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* @ntb: NTB device that facilitates communication between HOST and vHOST
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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* @mw: Index of the memory window (either 0, 1, 2 or 3)
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*
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* Teardown the configured OB ATU configured in epf_ntb_configure_mw() using
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@ -234,12 +237,12 @@ static void epf_ntb_teardown_mw(struct epf_ntb *ntb, u32 mw)
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}
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/**
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* epf_ntb_cmd_handler() - Handle commands provided by the NTB Host
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* epf_ntb_cmd_handler() - Handle commands provided by the NTB HOST
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* @work: work_struct for the epf_ntb_epc
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*
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* Workqueue function that gets invoked for the two epf_ntb_epc
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* periodically (once every 5ms) to see if it has received any commands
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* from NTB host. The host can send commands to configure doorbell or
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* from NTB HOST. The HOST can send commands to configure doorbell or
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* configure memory window or to update link status.
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*/
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static void epf_ntb_cmd_handler(struct work_struct *work)
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@ -254,12 +257,10 @@ static void epf_ntb_cmd_handler(struct work_struct *work)
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ntb = container_of(work, struct epf_ntb, cmd_handler.work);
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for (i = 1; i < ntb->db_count; i++) {
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if (readl(ntb->epf_db + i * 4)) {
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if (readl(ntb->epf_db + i * 4))
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ntb->db |= 1 << (i - 1);
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if (ntb->epf_db[i]) {
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ntb->db |= 1 << (i - 1);
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ntb_db_event(&ntb->ntb, i);
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writel(0, ntb->epf_db + i * 4);
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ntb->epf_db[i] = 0;
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}
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}
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@ -321,8 +322,8 @@ reset_handler:
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/**
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* epf_ntb_config_sspad_bar_clear() - Clear Config + Self scratchpad BAR
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* @ntb_epc: EPC associated with one of the HOST which holds peer's outbound
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* address.
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* @ntb: EPC associated with one of the HOST which holds peer's outbound
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* address.
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*
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* Clear BAR0 of EP CONTROLLER 1 which contains the HOST1's config and
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* self scratchpad region (removes inbound ATU configuration). While BAR0 is
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@ -331,8 +332,10 @@ reset_handler:
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* used for self scratchpad from epf_ntb_bar[BAR_CONFIG].
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*
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* Please note the self scratchpad region and config region is combined to
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* a single region and mapped using the same BAR. Also note HOST2's peer
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* scratchpad is HOST1's self scratchpad.
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* a single region and mapped using the same BAR. Also note VHOST's peer
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* scratchpad is HOST's self scratchpad.
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*
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* Returns: void
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*/
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static void epf_ntb_config_sspad_bar_clear(struct epf_ntb *ntb)
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{
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@ -347,13 +350,15 @@ static void epf_ntb_config_sspad_bar_clear(struct epf_ntb *ntb)
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/**
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* epf_ntb_config_sspad_bar_set() - Set Config + Self scratchpad BAR
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* @ntb: NTB device that facilitates communication between HOST and vHOST
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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*
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* Map BAR0 of EP CONTROLLER 1 which contains the HOST1's config and
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* Map BAR0 of EP CONTROLLER which contains the VHOST's config and
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* self scratchpad region.
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*
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* Please note the self scratchpad region and config region is combined to
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* a single region and mapped using the same BAR.
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*
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* Returns: Zero for success, or an error code in case of failure
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*/
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static int epf_ntb_config_sspad_bar_set(struct epf_ntb *ntb)
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{
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@ -380,7 +385,7 @@ static int epf_ntb_config_sspad_bar_set(struct epf_ntb *ntb)
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/**
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* epf_ntb_config_spad_bar_free() - Free the physical memory associated with
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* config + scratchpad region
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* @ntb: NTB device that facilitates communication between HOST and vHOST
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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*/
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static void epf_ntb_config_spad_bar_free(struct epf_ntb *ntb)
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{
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@ -393,11 +398,13 @@ static void epf_ntb_config_spad_bar_free(struct epf_ntb *ntb)
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/**
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* epf_ntb_config_spad_bar_alloc() - Allocate memory for config + scratchpad
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* region
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* @ntb: NTB device that facilitates communication between HOST1 and HOST2
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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*
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* Allocate the Local Memory mentioned in the above diagram. The size of
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* CONFIG REGION is sizeof(struct epf_ntb_ctrl) and size of SCRATCHPAD REGION
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* is obtained from "spad-count" configfs entry.
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*
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* Returns: Zero for success, or an error code in case of failure
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*/
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static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
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{
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@ -424,7 +431,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
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spad_count = ntb->spad_count;
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ctrl_size = sizeof(struct epf_ntb_ctrl);
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spad_size = 2 * spad_count * 4;
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spad_size = 2 * spad_count * sizeof(u32);
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if (!align) {
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ctrl_size = roundup_pow_of_two(ctrl_size);
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@ -454,7 +461,7 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
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ctrl->num_mws = ntb->num_mws;
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ntb->spad_size = spad_size;
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ctrl->db_entry_size = 4;
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ctrl->db_entry_size = sizeof(u32);
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for (i = 0; i < ntb->db_count; i++) {
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ntb->reg->db_data[i] = 1 + i;
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@ -465,11 +472,13 @@ static int epf_ntb_config_spad_bar_alloc(struct epf_ntb *ntb)
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}
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/**
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* epf_ntb_configure_interrupt() - Configure MSI/MSI-X capaiblity
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* @ntb: NTB device that facilitates communication between HOST and vHOST
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* epf_ntb_configure_interrupt() - Configure MSI/MSI-X capability
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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*
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* Configure MSI/MSI-X capability for each interface with number of
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* interrupts equal to "db_count" configfs entry.
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*
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* Returns: Zero for success, or an error code in case of failure
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*/
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static int epf_ntb_configure_interrupt(struct epf_ntb *ntb)
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{
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@ -511,7 +520,9 @@ static int epf_ntb_configure_interrupt(struct epf_ntb *ntb)
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/**
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* epf_ntb_db_bar_init() - Configure Doorbell window BARs
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* @ntb: NTB device that facilitates communication between HOST and vHOST
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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*
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* Returns: Zero for success, or an error code in case of failure
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*/
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static int epf_ntb_db_bar_init(struct epf_ntb *ntb)
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{
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@ -522,7 +533,7 @@ static int epf_ntb_db_bar_init(struct epf_ntb *ntb)
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struct pci_epf_bar *epf_bar;
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void __iomem *mw_addr;
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enum pci_barno barno;
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size_t size = 4 * ntb->db_count;
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size_t size = sizeof(u32) * ntb->db_count;
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epc_features = pci_epc_get_features(ntb->epf->epc,
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ntb->epf->func_no,
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@ -557,7 +568,7 @@ static int epf_ntb_db_bar_init(struct epf_ntb *ntb)
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return ret;
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err_alloc_peer_mem:
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pci_epc_mem_free_addr(ntb->epf->epc, epf_bar->phys_addr, mw_addr, epf_bar->size);
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pci_epf_free_space(ntb->epf, mw_addr, barno, 0);
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return -1;
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}
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@ -566,7 +577,7 @@ static void epf_ntb_mw_bar_clear(struct epf_ntb *ntb, int num_mws);
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/**
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* epf_ntb_db_bar_clear() - Clear doorbell BAR and free memory
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* allocated in peer's outbound address space
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* @ntb: NTB device that facilitates communication between HOST and vHOST
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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*/
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static void epf_ntb_db_bar_clear(struct epf_ntb *ntb)
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{
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@ -582,8 +593,9 @@ static void epf_ntb_db_bar_clear(struct epf_ntb *ntb)
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/**
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* epf_ntb_mw_bar_init() - Configure Memory window BARs
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* @ntb: NTB device that facilitates communication between HOST and vHOST
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* @ntb: NTB device that facilitates communication between HOST and VHOST
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*
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* Returns: Zero for success, or an error code in case of failure
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*/
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static int epf_ntb_mw_bar_init(struct epf_ntb *ntb)
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{
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@ -639,7 +651,7 @@ err_alloc_mem:
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|
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/**
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* epf_ntb_mw_bar_clear() - Clear Memory window BARs
|
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* @ntb: NTB device that facilitates communication between HOST and vHOST
|
||||
* @ntb: NTB device that facilitates communication between HOST and VHOST
|
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*/
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static void epf_ntb_mw_bar_clear(struct epf_ntb *ntb, int num_mws)
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{
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@ -662,7 +674,7 @@ static void epf_ntb_mw_bar_clear(struct epf_ntb *ntb, int num_mws)
|
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|
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/**
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* epf_ntb_epc_destroy() - Cleanup NTB EPC interface
|
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* @ntb: NTB device that facilitates communication between HOST and vHOST
|
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* @ntb: NTB device that facilitates communication between HOST and VHOST
|
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*
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* Wrapper for epf_ntb_epc_destroy_interface() to cleanup all the NTB interfaces
|
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*/
|
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@ -675,7 +687,9 @@ static void epf_ntb_epc_destroy(struct epf_ntb *ntb)
|
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/**
|
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* epf_ntb_init_epc_bar() - Identify BARs to be used for each of the NTB
|
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* constructs (scratchpad region, doorbell, memorywindow)
|
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* @ntb: NTB device that facilitates communication between HOST and vHOST
|
||||
* @ntb: NTB device that facilitates communication between HOST and VHOST
|
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*
|
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* Returns: Zero for success, or an error code in case of failure
|
||||
*/
|
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static int epf_ntb_init_epc_bar(struct epf_ntb *ntb)
|
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{
|
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@ -716,11 +730,13 @@ static int epf_ntb_init_epc_bar(struct epf_ntb *ntb)
|
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|
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/**
|
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* epf_ntb_epc_init() - Initialize NTB interface
|
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* @ntb: NTB device that facilitates communication between HOST and vHOST2
|
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* @ntb: NTB device that facilitates communication between HOST and VHOST
|
||||
*
|
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* Wrapper to initialize a particular EPC interface and start the workqueue
|
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* to check for commands from host. This function will write to the
|
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* to check for commands from HOST. This function will write to the
|
||||
* EP controller HW for configuring it.
|
||||
*
|
||||
* Returns: Zero for success, or an error code in case of failure
|
||||
*/
|
||||
static int epf_ntb_epc_init(struct epf_ntb *ntb)
|
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{
|
||||
@ -787,7 +803,7 @@ err_config_interrupt:
|
||||
|
||||
/**
|
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* epf_ntb_epc_cleanup() - Cleanup all NTB interfaces
|
||||
* @ntb: NTB device that facilitates communication between HOST1 and HOST2
|
||||
* @ntb: NTB device that facilitates communication between HOST and VHOST
|
||||
*
|
||||
* Wrapper to cleanup all NTB interfaces.
|
||||
*/
|
||||
@ -951,6 +967,8 @@ static const struct config_item_type ntb_group_type = {
|
||||
*
|
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* Add configfs directory specific to NTB. This directory will hold
|
||||
* NTB specific properties like db_count, spad_count, num_mws etc.,
|
||||
*
|
||||
* Returns: Pointer to config_group
|
||||
*/
|
||||
static struct config_group *epf_ntb_add_cfs(struct pci_epf *epf,
|
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struct config_group *group)
|
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@ -1101,11 +1119,11 @@ static int vntb_epf_link_enable(struct ntb_dev *ntb,
|
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static u32 vntb_epf_spad_read(struct ntb_dev *ndev, int idx)
|
||||
{
|
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struct epf_ntb *ntb = ntb_ndev(ndev);
|
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int off = ntb->reg->spad_offset, ct = ntb->reg->spad_count * 4;
|
||||
int off = ntb->reg->spad_offset, ct = ntb->reg->spad_count * sizeof(u32);
|
||||
u32 val;
|
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void __iomem *base = ntb->reg;
|
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void __iomem *base = (void __iomem *)ntb->reg;
|
||||
|
||||
val = readl(base + off + ct + idx * 4);
|
||||
val = readl(base + off + ct + idx * sizeof(u32));
|
||||
return val;
|
||||
}
|
||||
|
||||
@ -1113,10 +1131,10 @@ static int vntb_epf_spad_write(struct ntb_dev *ndev, int idx, u32 val)
|
||||
{
|
||||
struct epf_ntb *ntb = ntb_ndev(ndev);
|
||||
struct epf_ntb_ctrl *ctrl = ntb->reg;
|
||||
int off = ctrl->spad_offset, ct = ctrl->spad_count * 4;
|
||||
void __iomem *base = ntb->reg;
|
||||
int off = ctrl->spad_offset, ct = ctrl->spad_count * sizeof(u32);
|
||||
void __iomem *base = (void __iomem *)ntb->reg;
|
||||
|
||||
writel(val, base + off + ct + idx * 4);
|
||||
writel(val, base + off + ct + idx * sizeof(u32));
|
||||
return 0;
|
||||
}
|
||||
|
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@ -1125,10 +1143,10 @@ static u32 vntb_epf_peer_spad_read(struct ntb_dev *ndev, int pidx, int idx)
|
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struct epf_ntb *ntb = ntb_ndev(ndev);
|
||||
struct epf_ntb_ctrl *ctrl = ntb->reg;
|
||||
int off = ctrl->spad_offset;
|
||||
void __iomem *base = ntb->reg;
|
||||
void __iomem *base = (void __iomem *)ntb->reg;
|
||||
u32 val;
|
||||
|
||||
val = readl(base + off + idx * 4);
|
||||
val = readl(base + off + idx * sizeof(u32));
|
||||
return val;
|
||||
}
|
||||
|
||||
@ -1137,9 +1155,9 @@ static int vntb_epf_peer_spad_write(struct ntb_dev *ndev, int pidx, int idx, u32
|
||||
struct epf_ntb *ntb = ntb_ndev(ndev);
|
||||
struct epf_ntb_ctrl *ctrl = ntb->reg;
|
||||
int off = ctrl->spad_offset;
|
||||
void __iomem *base = ntb->reg;
|
||||
void __iomem *base = (void __iomem *)ntb->reg;
|
||||
|
||||
writel(val, base + off + idx * 4);
|
||||
writel(val, base + off + idx * sizeof(u32));
|
||||
return 0;
|
||||
}
|
||||
|
||||
@ -1292,6 +1310,8 @@ static struct pci_driver vntb_pci_driver = {
|
||||
* Invoked when a primary interface or secondary interface is bound to EPC
|
||||
* device. This function will succeed only when EPC is bound to both the
|
||||
* interfaces.
|
||||
*
|
||||
* Returns: Zero for success, or an error code in case of failure
|
||||
*/
|
||||
static int epf_ntb_bind(struct pci_epf *epf)
|
||||
{
|
||||
@ -1377,6 +1397,8 @@ static struct pci_epf_ops epf_ntb_ops = {
|
||||
*
|
||||
* Probe NTB function driver when endpoint function bus detects a NTB
|
||||
* endpoint function.
|
||||
*
|
||||
* Returns: Zero for success, or an error code in case of failure
|
||||
*/
|
||||
static int epf_ntb_probe(struct pci_epf *epf)
|
||||
{
|
||||
|
||||
@ -724,7 +724,6 @@ void pci_epc_destroy(struct pci_epc *epc)
|
||||
{
|
||||
pci_ep_cfs_remove_epc_group(epc->group);
|
||||
device_unregister(&epc->dev);
|
||||
kfree(epc);
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(pci_epc_destroy);
|
||||
|
||||
@ -746,6 +745,11 @@ void devm_pci_epc_destroy(struct device *dev, struct pci_epc *epc)
|
||||
}
|
||||
EXPORT_SYMBOL_GPL(devm_pci_epc_destroy);
|
||||
|
||||
static void pci_epc_release(struct device *dev)
|
||||
{
|
||||
kfree(to_pci_epc(dev));
|
||||
}
|
||||
|
||||
/**
|
||||
* __pci_epc_create() - create a new endpoint controller (EPC) device
|
||||
* @dev: device that is creating the new EPC
|
||||
@ -779,6 +783,7 @@ __pci_epc_create(struct device *dev, const struct pci_epc_ops *ops,
|
||||
device_initialize(&epc->dev);
|
||||
epc->dev.class = pci_epc_class;
|
||||
epc->dev.parent = dev;
|
||||
epc->dev.release = pci_epc_release;
|
||||
epc->ops = ops;
|
||||
|
||||
ret = dev_set_name(&epc->dev, "%s", dev_name(dev));
|
||||
|
||||
Loading…
Reference in New Issue
Block a user