PCI/ACPI: Remove unnecessary struct hotplug_program_ops

Move the ACPI-specific structs hpx_type0, hpx_type1, hpx_type2 and
hpx_type3 to drivers/pci/pci-acpi.c as they are not used anywhere else.
Then remove the struct hotplug_program_ops that has been shared between
drivers/pci/probe.c and drivers/pci/pci-acpi.c from drivers/pci/pci.h as it
is no longer needed.

The struct hotplug_program_ops was added by 87fcf12e846a ("PCI/ACPI: Remove
the need for 'struct hotplug_params'") and replaced previously used struct
hotplug_params enabling the support for the _HPX Type 3 Setting Record that
was added by f873c51a155a ("PCI/ACPI: Implement _HPX Type 3 Setting
Record").

The new struct allowed for the static functions such program_hpx_type0(),
program_hpx_type1(), etc., from the drivers/pci/probe.c to be called from
the function pci_acpi_program_hp_params() in the drivers/pci/pci-acpi.c.

Previously a programming of _HPX Type 0 was as follows:

  drivers/pci/probe.c:

    program_hpx_type0()
    ...
    pci_configure_device()
      hp_ops = {
        .program_type0 = program_hpx_type0,
        ...
      }
      pci_acpi_program_hp_params(&hp_ops)

  drivers/pci/pci-acpi.c:

    pci_acpi_program_hp_params(&hp_ops)
      acpi_run_hpx(hp_ops)
        decode_type0_hpx_record()
          hp_ops->program_type0     # program_hpx_type0() called via hp_ops

After the ACPI-specific functions, structs, enums, etc., have been moved to
drivers/pci/pci-acpi.c there is no need for the hotplug_program_ops as all
of the _HPX Type 0, 1, 2 and 3 are directly accessible.

Link: https://lore.kernel.org/r/20190827094951.10613-4-kw@linux.com
Signed-off-by: Krzysztof Wilczynski <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>

3 files changed, 76 insertions, 102 deletions

diff --git a/drivers/pci/pci-acpi.c b/drivers/pci/pci-acpi.c
index 0bfabb3f9931..6e65d1ff93da 100644
--- a/drivers/pci/pci-acpi.c
+++ b/drivers/pci/pci-acpi.c
@@ -118,6 +118,15 @@ phys_addr_t acpi_pci_root_get_mcfg_addr(acpi_handle handle)
         return (phys_addr_t)mcfg_addr;
 }
 
+/* _HPX PCI Setting Record (Type 0); same as _HPP */
+struct hpx_type0 {
+        u32 revision;           /* Not present in _HPP */
+        u8  cache_line_size;    /* Not applicable to PCIe */
+        u8  latency_timer;      /* Not applicable to PCIe */
+        u8  enable_serr;
+        u8  enable_perr;
+};
+
 static struct hpx_type0 pci_default_type0 = {
         .revision = 1,
         .cache_line_size = 8,
@@ -126,7 +135,7 @@ static struct hpx_type0 pci_default_type0 = {
         .enable_perr = 0,
 };
 
-void program_hpx_type0(struct pci_dev *dev, struct hpx_type0 *hpx)
+static void program_hpx_type0(struct pci_dev *dev, struct hpx_type0 *hpx)
 {
         u16 pci_cmd, pci_bctl;
 
@@ -187,7 +196,15 @@ static acpi_status decode_type0_hpx_record(union acpi_object *record,
         return AE_OK;
 }
 
-void program_hpx_type1(struct pci_dev *dev, struct hpx_type1 *hpx)
+/* _HPX PCI-X Setting Record (Type 1) */
+struct hpx_type1 {
+        u32 revision;
+        u8  max_mem_read;
+        u8  avg_max_split;
+        u16 tot_max_split;
+};
+
+static void program_hpx_type1(struct pci_dev *dev, struct hpx_type1 *hpx)
 {
         int pos;
 
@@ -243,7 +260,28 @@ static bool pcie_root_rcb_set(struct pci_dev *dev)
         return false;
 }
 
-void program_hpx_type2(struct pci_dev *dev, struct hpx_type2 *hpx)
+/* _HPX PCI Express Setting Record (Type 2) */
+struct hpx_type2 {
+        u32 revision;
+        u32 unc_err_mask_and;
+        u32 unc_err_mask_or;
+        u32 unc_err_sever_and;
+        u32 unc_err_sever_or;
+        u32 cor_err_mask_and;
+        u32 cor_err_mask_or;
+        u32 adv_err_cap_and;
+        u32 adv_err_cap_or;
+        u16 pci_exp_devctl_and;
+        u16 pci_exp_devctl_or;
+        u16 pci_exp_lnkctl_and;
+        u16 pci_exp_lnkctl_or;
+        u32 sec_unc_err_sever_and;
+        u32 sec_unc_err_sever_or;
+        u32 sec_unc_err_mask_and;
+        u32 sec_unc_err_mask_or;
+};
+
+static void program_hpx_type2(struct pci_dev *dev, struct hpx_type2 *hpx)
 {
         int pos;
         u32 reg32;
@@ -369,6 +407,24 @@ static acpi_status decode_type2_hpx_record(union acpi_object *record,
         return AE_OK;
 }
 
+/* _HPX PCI Express Setting Record (Type 3) */
+struct hpx_type3 {
+        u16 device_type;
+        u16 function_type;
+        u16 config_space_location;
+        u16 pci_exp_cap_id;
+        u16 pci_exp_cap_ver;
+        u16 pci_exp_vendor_id;
+        u16 dvsec_id;
+        u16 dvsec_rev;
+        u16 match_offset;
+        u32 match_mask_and;
+        u32 match_value;
+        u16 reg_offset;
+        u32 reg_mask_and;
+        u32 reg_mask_or;
+};
+
 enum hpx_type3_dev_type {
         HPX_TYPE_ENDPOINT       = BIT(0),
         HPX_TYPE_LEG_END        = BIT(1),
@@ -498,7 +554,7 @@ static void program_hpx_type3_register(struct pci_dev *dev,
                 pos, orig_value, write_reg);
 }
 
-void program_hpx_type3(struct pci_dev *dev, struct hpx_type3 *hpx)
+static void program_hpx_type3(struct pci_dev *dev, struct hpx_type3 *hpx)
 {
         if (!hpx)
                 return;
@@ -529,8 +585,7 @@ static void parse_hpx3_register(struct hpx_type3 *hpx3_reg,
 }
 
 static acpi_status program_type3_hpx_record(struct pci_dev *dev,
-                                           union acpi_object *record,
-                                           const struct hotplug_program_ops *hp_ops)
+                                           union acpi_object *record)
 {
         union acpi_object *fields = record->package.elements;
         u32 desc_count, expected_length, revision;
@@ -554,7 +609,7 @@ static acpi_status program_type3_hpx_record(struct pci_dev *dev,
                 for (i = 0; i < desc_count; i++) {
                         reg_fields = fields + 3 + i * 14;
                         parse_hpx3_register(&hpx3, reg_fields);
-                        hp_ops->program_type3(dev, &hpx3);
+                        program_hpx_type3(dev, &hpx3);
                 }
 
                 break;
@@ -567,8 +622,7 @@ static acpi_status program_type3_hpx_record(struct pci_dev *dev,
         return AE_OK;
 }
 
-static acpi_status acpi_run_hpx(struct pci_dev *dev, acpi_handle handle,
-                                const struct hotplug_program_ops *hp_ops)
+static acpi_status acpi_run_hpx(struct pci_dev *dev, acpi_handle handle)
 {
         acpi_status status;
         struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL};
@@ -610,24 +664,24 @@ static acpi_status acpi_run_hpx(struct pci_dev *dev, acpi_handle handle,
                         status = decode_type0_hpx_record(record, &hpx0);
                         if (ACPI_FAILURE(status))
                                 goto exit;
-                        hp_ops->program_type0(dev, &hpx0);
+                        program_hpx_type0(dev, &hpx0);
                         break;
                 case 1:
                         memset(&hpx1, 0, sizeof(hpx1));
                         status = decode_type1_hpx_record(record, &hpx1);
                         if (ACPI_FAILURE(status))
                                 goto exit;
-                        hp_ops->program_type1(dev, &hpx1);
+                        program_hpx_type1(dev, &hpx1);
                         break;
                 case 2:
                         memset(&hpx2, 0, sizeof(hpx2));
                         status = decode_type2_hpx_record(record, &hpx2);
                         if (ACPI_FAILURE(status))
                                 goto exit;
-                        hp_ops->program_type2(dev, &hpx2);
+                        program_hpx_type2(dev, &hpx2);
                         break;
                 case 3:
-                        status = program_type3_hpx_record(dev, record, hp_ops);
+                        status = program_type3_hpx_record(dev, record);
                         if (ACPI_FAILURE(status))
                                 goto exit;
                         break;
@@ -643,8 +697,7 @@ static acpi_status acpi_run_hpx(struct pci_dev *dev, acpi_handle handle,
         return status;
 }
 
-static acpi_status acpi_run_hpp(struct pci_dev *dev, acpi_handle handle,
-                                const struct hotplug_program_ops *hp_ops)
+static acpi_status acpi_run_hpp(struct pci_dev *dev, acpi_handle handle)
 {
         acpi_status status;
         struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
@@ -679,20 +732,18 @@ static acpi_status acpi_run_hpp(struct pci_dev *dev, acpi_handle handle,
         hpx0.enable_serr     = fields[2].integer.value;
         hpx0.enable_perr     = fields[3].integer.value;
 
-        hp_ops->program_type0(dev, &hpx0);
+        program_hpx_type0(dev, &hpx0);
 
 exit:
         kfree(buffer.pointer);
         return status;
 }
 
-/* pci_get_hp_params
+/* pci_acpi_program_hp_params
  *
  * @dev - the pci_dev for which we want parameters
- * @hpp - allocated by the caller
  */
-int pci_acpi_program_hp_params(struct pci_dev *dev,
-                               const struct hotplug_program_ops *hp_ops)
+int pci_acpi_program_hp_params(struct pci_dev *dev)
 {
         acpi_status status;
         acpi_handle handle, phandle;
@@ -715,10 +766,10 @@ int pci_acpi_program_hp_params(struct pci_dev *dev,
          * this pci dev.
          */
         while (handle) {
-                status = acpi_run_hpx(dev, handle, hp_ops);
+                status = acpi_run_hpx(dev, handle);
                 if (ACPI_SUCCESS(status))
                         return 0;
-                status = acpi_run_hpp(dev, handle, hp_ops);
+                status = acpi_run_hpp(dev, handle);
                 if (ACPI_SUCCESS(status))
                         return 0;
                 if (acpi_is_root_bridge(handle))
diff --git a/drivers/pci/pci.h b/drivers/pci/pci.h
index dad43c64b350..97180274c60b 100644
--- a/drivers/pci/pci.h
+++ b/drivers/pci/pci.h
@@ -608,80 +608,10 @@ static inline void pci_aer_clear_fatal_status(struct pci_dev *dev) { }
 static inline void pci_aer_clear_device_status(struct pci_dev *dev) { }
 #endif
 
-/* _HPX PCI Setting Record (Type 0); same as _HPP */
-struct hpx_type0 {
-        u32 revision;           /* Not present in _HPP */
-        u8  cache_line_size;    /* Not applicable to PCIe */
-        u8  latency_timer;      /* Not applicable to PCIe */
-        u8  enable_serr;
-        u8  enable_perr;
-};
-
-/* _HPX PCI-X Setting Record (Type 1) */
-struct hpx_type1 {
-        u32 revision;
-        u8  max_mem_read;
-        u8  avg_max_split;
-        u16 tot_max_split;
-};
-
-/* _HPX PCI Express Setting Record (Type 2) */
-struct hpx_type2 {
-        u32 revision;
-        u32 unc_err_mask_and;
-        u32 unc_err_mask_or;
-        u32 unc_err_sever_and;
-        u32 unc_err_sever_or;
-        u32 cor_err_mask_and;
-        u32 cor_err_mask_or;
-        u32 adv_err_cap_and;
-        u32 adv_err_cap_or;
-        u16 pci_exp_devctl_and;
-        u16 pci_exp_devctl_or;
-        u16 pci_exp_lnkctl_and;
-        u16 pci_exp_lnkctl_or;
-        u32 sec_unc_err_sever_and;
-        u32 sec_unc_err_sever_or;
-        u32 sec_unc_err_mask_and;
-        u32 sec_unc_err_mask_or;
-};
-
-/* _HPX PCI Express Setting Record (Type 3) */
-struct hpx_type3 {
-        u16 device_type;
-        u16 function_type;
-        u16 config_space_location;
-        u16 pci_exp_cap_id;
-        u16 pci_exp_cap_ver;
-        u16 pci_exp_vendor_id;
-        u16 dvsec_id;
-        u16 dvsec_rev;
-        u16 match_offset;
-        u32 match_mask_and;
-        u32 match_value;
-        u16 reg_offset;
-        u32 reg_mask_and;
-        u32 reg_mask_or;
-};
-
-void program_hpx_type0(struct pci_dev *dev, struct hpx_type0 *hpx);
-void program_hpx_type1(struct pci_dev *dev, struct hpx_type1 *hpx);
-void program_hpx_type2(struct pci_dev *dev, struct hpx_type2 *hpx);
-void program_hpx_type3(struct pci_dev *dev, struct hpx_type3 *hpx);
-
-struct hotplug_program_ops {
-        void (*program_type0)(struct pci_dev *dev, struct hpx_type0 *hpx);
-        void (*program_type1)(struct pci_dev *dev, struct hpx_type1 *hpx);
-        void (*program_type2)(struct pci_dev *dev, struct hpx_type2 *hpx);
-        void (*program_type3)(struct pci_dev *dev, struct hpx_type3 *hpx);
-};
-
 #ifdef CONFIG_ACPI
-int pci_acpi_program_hp_params(struct pci_dev *dev,
-                               const struct hotplug_program_ops *hp_ops);
+int pci_acpi_program_hp_params(struct pci_dev *dev);
 #else
-static inline int pci_acpi_program_hp_params(struct pci_dev *dev,
-                                    const struct hotplug_program_ops *hp_ops)
+static inline int pci_acpi_program_hp_params(struct pci_dev *dev)
 {
         return -ENODEV;
 }
diff --git a/drivers/pci/probe.c b/drivers/pci/probe.c
index 5847b557dc9a..cdf34a3c531a 100644
--- a/drivers/pci/probe.c
+++ b/drivers/pci/probe.c
@@ -2100,13 +2100,6 @@ static void pci_configure_serr(struct pci_dev *dev)
 
 static void pci_configure_device(struct pci_dev *dev)
 {
-        static const struct hotplug_program_ops hp_ops = {
-                .program_type0 = program_hpx_type0,
-                .program_type1 = program_hpx_type1,
-                .program_type2 = program_hpx_type2,
-                .program_type3 = program_hpx_type3,
-        };
-
         pci_configure_mps(dev);
         pci_configure_extended_tags(dev, NULL);
         pci_configure_relaxed_ordering(dev);
@@ -2114,7 +2107,7 @@ static void pci_configure_device(struct pci_dev *dev)
         pci_configure_eetlp_prefix(dev);
         pci_configure_serr(dev);
 
-        pci_acpi_program_hp_params(dev, &hp_ops);
+        pci_acpi_program_hp_params(dev);
 }
 
 static void pci_release_capabilities(struct pci_dev *dev)